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Pan X, Bi S, Xu Y, Cai Y, Lao F, Wu J. Alteration of volatile profiles in heat-sterilized cloudy muskmelon juice as affected by pectin fractions. J Sci Food Agric 2024; 104:3532-3542. [PMID: 38146066 DOI: 10.1002/jsfa.13238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 12/27/2023]
Abstract
BACKGROUND Flavor is considered as a key quality attribute of fruit juice affecting consumer acceptance. During processing, the flavor loss of cloudy juice always occurs due to the variations of juice cloud particles. Pectin, a major component of cloud particles, plays an important role in cloud stability. In this work, we focused on the effects of variation of three pectin fractions caused by gentle centrifugation and clarification on the physicochemical properties, volatile content and sensory profile of heat-sterilized muskmelon cloudy juice. RESULTS Centrifugation treatment reduced the total soluble solids and viscosity of cloudy juice and increased cloud stability. With centrifugation increased, the contents of most monosaccharides in the three pectin fractions were reduced. Most aroma-active aldehydes and alcohols, such as (2E,6Z)-nonadienal, 1-octen-3-ol and (E)-non-2-enal, after gentle centrifugation and clarification, were maintained, but most esters were decreased. The volatile compositions were highly related to the three pectin fractions. The addition of chelator-soluble pectin and sodium carbonate-soluble pectin could decrease the formation of dimethyl trisulfide and dimethyl disulfide in clarified juice, thereby improving the sensory profile. CONCLUSION The results suggested that endogenous chelator-soluble pectin and sodium carbonate-soluble pectin can be used in heat-sterilized fruit juice to improve flavor quality, with an emphasis on a significant reduction in volatile sulfur compounds. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Xin Pan
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing, China
| | - Shuang Bi
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing, China
- College of Food and Health, Beijing Technology and Business University (BTBU), Beijing, China
| | - Yingying Xu
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing, China
| | - Yanpei Cai
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing, China
| | - Fei Lao
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing, China
| | - Jihong Wu
- College of Food Science and Nutritional Engineering, China Agricultural University; National Engineering Research Center for Fruit & Vegetable Processing; Key Laboratory of Fruit & Vegetable Processing, Ministry of Agriculture and Rural Affairs; Beijing Key Laboratory for Food Non-thermal Processing, Beijing, China
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2
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Héroux ME, Gandevia SC. Proprioception: Clarification of low-level and high-level-Response to Wali and Block 2024. J Appl Physiol (1985) 2024; 136:511-513. [PMID: 38423517 DOI: 10.1152/japplphysiol.00088.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024] Open
Affiliation(s)
- Martin E Héroux
- Neuroscience Research Australia, Sydney, New South Wales, Australia
- School of Biomedical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Simon C Gandevia
- Neuroscience Research Australia, Sydney, New South Wales, Australia
- School of Clinical Medicine, University of New South Wales, Sydney, New South Wales, Australia
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3
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Rahane SB, Gupta A, Szymanski P, Kinzlmaier D, McGee P, Goodrich E. Concentration of clarified pool by single-pass tangential flow filtration to improve productivity of protein A capture step: Impact of clarification strategies. Biotechnol Bioeng 2024; 121:1090-1101. [PMID: 38151902 DOI: 10.1002/bit.28634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 12/08/2023] [Accepted: 12/10/2023] [Indexed: 12/29/2023]
Abstract
Protein A capture chromatography remains a high-cost and relatively low-productivity step for downstream processing of monoclonal antibodies. As bioprocessing transitions toward intensified processes, maximizing the efficiency of individual steps is key to achieving economic targets. This study was performed to assess the impact of inline concentration of clarified cell culture fluid (CCF), using single-pass tangential flow filtration, on protein A chromatography purification productivity. CCF with varying levels of impurities and turbidity were obtained dependent upon the clarification method. These CCFs were concentrated and processed over a protein A capture step. Productivity increases of 1.8- to 2.6-fold were achieved as compared to a protein A capture step with no CCF concentration. Achieving such targeted improvements requires careful consideration of the multiple components in the clarification strategy before implementation.
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Jafari S, Shiekh KA, Mishra DK, Kijpatanasilp I, Assatarakul K. Combined Effects of Clarifying Agents Improve Physicochemical, Microbial and Sensorial Qualities of Fresh Indian Gooseberry ( Phyllanthus emblica L.) Juice during Refrigerated Storage. Foods 2024; 13:290. [PMID: 38254591 PMCID: PMC10815077 DOI: 10.3390/foods13020290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/22/2023] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Using clarifying agents is essential in the production of fruit juice. This study utilized gelatin and bentonite as clarifying agents to improve the quality and shelf-life of Indian gooseberry juice (IGBJ). Different treatments were prepared using varying levels of gelatin and bentonite alone or in combination (1.5-2 mg/mL and 1-2 mg/mL, respectively). The untreated IGBJ was used as a control. The results showed the combined treatment of 1.5 mg/mL gelatin and 1 mg/mL bentonite significantly (p ≤ 0.05) improved the transmittance, △E value, total acidity, vitamin C, and antioxidant activity of the IGBJ sample. During storage for 49 days at 4 °C, the quality changes in the IGBJ were minimal with the use of 1.5 mg/mL gelatin and 1 mg/mL bentonite compared to the control (p > 0.05). The treated samples showed no signs of spoilage bacteria, yeast, or mold during cold storage. The combined use of gelatin and bentonite (1.5 mg/mL gelatin and 1 mg/mL bentonite) was found to effectively preserve the sensory quality, bioactivity, and color properties of IGBJ, thereby extending its shelf-life. Thus, gelatin and bentonite can be used as preferred filtering aids for quality and shelf-life extension in the food industry, as they have synergistic effects.
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Affiliation(s)
- Saeid Jafari
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (S.J.); (K.A.S.); (I.K.)
| | - Khursheed Ahmad Shiekh
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (S.J.); (K.A.S.); (I.K.)
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853, USA
| | - Dharmendra K. Mishra
- Department of Food Science, Purdue University, 745 Agriculture Mall Dr, West Lafayette, IN 47907, USA;
| | - Isaya Kijpatanasilp
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (S.J.); (K.A.S.); (I.K.)
| | - Kitipong Assatarakul
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (S.J.); (K.A.S.); (I.K.)
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5
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Pérez K, Cassano A, Ruby-Figueroa R. The Optimization of Operating Conditions in the Cross-Flow Microfiltration of Grape Marc Extract by Response Surface Methodology. Foods 2023; 13:20. [PMID: 38201048 PMCID: PMC10778125 DOI: 10.3390/foods13010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024] Open
Abstract
The recovery of valuable compounds like phenolic compounds and sugars from grape marc extracts implies different steps, including clarification. In this study, a response surface methodology (RSM) was used as a statistical tool to study the effects of operating conditions such as transmembrane pressure (TMP), temperature and feed flow rate on the performance of a microfiltration (MF) monotubular ceramic membrane with a pore size of 0.14 μm in the clarification of grape marc extract from the Carménère variety, as well to optimize the process conditions by implementing the Box-Behnken statistical design. The desirability function approach was applied to analyze the regression model equations in order to maximize the permeate flux and concentration of malvidin-3-O-glucoside, glucose and fructose in the clarified extract. The optimal operating conditions were found to be 1 bar, 29.01 °C and 5.64 L/min. Under these conditions, the permeate flux and concentration of malvidin-3-O-glucoside, glucose and fructose resulted in 65.78 L/m2h, 43.73 mg/L, 305.89 mg/L, and 274.85 mg/L, respectively.
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Affiliation(s)
- Karla Pérez
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile;
| | - Alfredo Cassano
- Institute on Membrane Technology, ITM-CNR, University of Calabria, via P. Bucci, 17/C, 87036 Rende, Italy
| | - René Ruby-Figueroa
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile;
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6
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Mamabolo MM, Tabit FT. Process optimisation for enzymatic clarification of indigenous wild watermelon ( Citrullus lanatus) juice. FOOD SCI TECHNOL INT 2023; 29:779-788. [PMID: 35903911 PMCID: PMC10621027 DOI: 10.1177/10820132221117457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 07/14/2022] [Indexed: 11/16/2022]
Abstract
A fundamental step in improving the quality and consumer acceptability of wild watermelon (Citrullus lanatus) is the process of juice clarification. The aim of this research was to investigate the physicochemical properties of crude wild watermelon (Citrullus lanatus) juice and to optimise the processing conditions, incubation time, incubation temperature and enzyme concentration for the enzymatic clarification of the crude juice. Crude wild watermelon juice samples were treated with pectinase enzyme in different concentrations (0.05 to 0.15 w/w%), at different incubation temperatures (30-50 oC) and for different incubation durations (60-180 min). The effects of the different treatments on turbidity, clarity, viscosity, lightness, and brix were determined. The response models adequately predicted turbidity, clarity, and viscosity at R2 > 0.5, but not lightness considering that R2 < 0.5. The model was statistically significant in predicting turbidity (R2 = 0.86), clarity (R2 = 0.81), viscosity (R2 = 0.97) and brix (R2 = 0.94) - but not lightness (R2 = 0.24) at p < 0.05. The enzyme concentration did not significantly affect turbidity, clarity, and lightness, but it did significantly affect brix positively (p < 0.05). Response surface methodology software was used to determine optimal clarification conditions. In conclusion, the optimum conditions for crude watermelon juice clarification were 0.15 w/w% enzyme concentration, 60 min incubation time and 60 oC incubation temperature. The optimum output parameters were 14.18 NTU for turbidity, 0.04 Abs for clarity, 52.30 L* value for lightness, 1.96 cps for viscosity and 3.08% for Brix.
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Affiliation(s)
- Moselo Maureen Mamabolo
- Department of Life and Consumer Sciences, University of South Africa, Florida, Roodepoort, South Africa
| | - Frederick Tawi Tabit
- Department of Life and Consumer Sciences, University of South Africa, Florida, Roodepoort, South Africa
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7
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Shirvani A, Mirzaaghaei M, Goli SAH. Application of natural fining agents to clarify fruit juices. Compr Rev Food Sci Food Saf 2023; 22:4190-4216. [PMID: 37615977 DOI: 10.1111/1541-4337.13207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/11/2023] [Accepted: 06/13/2023] [Indexed: 08/25/2023]
Abstract
The consumption of fruit juices has been increasingly growing all over the world. The clarification process is considered as one of the most important stages in fruit juice production, which can provide the products with desired clear visual appearance. Nowadays, the tendency of consumers to use the natural-clarified fruit juices encourages the researchers to allocate much attention on utilization of natural clarifying agents to clarify different fruit juices. This review article has first introduced the most frequent causes of turbidity in fruit juices including polysaccharides (i.e., cellulose, hemicelluloses, lignin, starch, and pectic substances), proteins and polyphenols (especially tannins) as well as their removal mechanisms. After that, a comprehensive summary of research on natural fining agents, including clay minerals, polysaccharides, proteins, enzymes (free and immobilized forms), and activated carbon is provided with a focus on their application in the juice clarification process. The chemical composition of natural substances, their efficiency on reduction of turbidity-causing compounds and the changes in properties of clarified juices such as turbidity (clarity), total phenolic content, total anthocyanins, viscosity, and sensory evaluation followed by their stability during the storage have been deeply discussed.
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Affiliation(s)
- Atefe Shirvani
- Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
| | - Marzieh Mirzaaghaei
- Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
| | - Sayed Amir Hossein Goli
- Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
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8
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da Silva PM, Esparza-Flores EE, Virgili AH, de Menezes EW, Fernandez-Lafuente R, Dal Magro L, Rodrigues RC. Effect of Support Matrix and Crosslinking Agents on Nutritional Properties of Orange Juice during Enzyme Clarification: A Comparative Study. Foods 2023; 12:3919. [PMID: 37959038 PMCID: PMC10647825 DOI: 10.3390/foods12213919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/17/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
This study investigated the impact of a support matrix and active group on the support to the nutritional properties of orange juice after juice clarification. Pectinase was immobilized on chitosan and aminated silica supports, activated with genipin or glutaraldehyde, and applied for juice clarification. The effects on various juice properties, including reducing sugars, total soluble solids, vitamin C, and phenolic compounds, juice color, and pH, were evaluated. The results revealed that the immobilization on chitosan activated using genipin resulted in the highest biocatalyst activity (1211.21 U·g-1). The juice treatments using the biocatalysts led to turbidity reduction in the juice (up to 90%), with the highest reductions observed in treatments involving immobilized enzyme on chitosan. Importantly, the enzymatic treatments preserved the natural sugar content, total soluble solids, and pH of the juice. Color differences between treated and raw juice samples were especially relevant for those treated using enzymes, with significant differences in L* and b*, showing loss of yellow vivid color. Analysis of phenolic compounds and vitamin C showed no significant alterations after the enzymatic treatment of the raw juice. According to our results, the clarification of orange juice using immobilized enzymes can be a compromise in turbidity reduction and color reduction to maintain juice quality.
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Affiliation(s)
- Pâmela M. da Silva
- Biocatalysis and Enzyme Technology Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, P.O. Box 15090, Porto Alegre 91501-970, RS, Brazil; (P.M.d.S.); (E.E.E.-F.)
| | - Eli Emanuel Esparza-Flores
- Biocatalysis and Enzyme Technology Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, P.O. Box 15090, Porto Alegre 91501-970, RS, Brazil; (P.M.d.S.); (E.E.E.-F.)
| | - Anike H. Virgili
- LSS—Laboratory of Solids and Surfaces, Instituto de Química, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, RS, Brazil; (A.H.V.); (E.W.d.M.)
| | - Eliana W. de Menezes
- LSS—Laboratory of Solids and Surfaces, Instituto de Química, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, RS, Brazil; (A.H.V.); (E.W.d.M.)
| | | | - Lucas Dal Magro
- Instituto Federal de Educação Ciência e Tecnologia Sul-Rio-Grandense—IFSul, Pelotas 96015-360, RS, Brazil;
| | - Rafael C. Rodrigues
- Biocatalysis and Enzyme Technology Laboratory, Food Science and Technology Institute, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, P.O. Box 15090, Porto Alegre 91501-970, RS, Brazil; (P.M.d.S.); (E.E.E.-F.)
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Lorenzo E, Miranda L, Gòdia F, Cervera L. Downstream process design for Gag HIV-1 based virus-like particles. Biotechnol Bioeng 2023; 120:2672-2684. [PMID: 37148527 DOI: 10.1002/bit.28419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 04/05/2023] [Accepted: 04/10/2023] [Indexed: 05/08/2023]
Abstract
Virus-like particles-based vaccines have been gaining interest in recent years. The manufacturing of these particles includes their production by cell culture followed by their purification to meet the requirements of its final use. The presence of host cell extracellular vesicles represents a challenge for better virus-like particles purification, because both share similar characteristics which hinders their separation. The present study aims to compare some of the most used downstream processing technologies for capture and purification of virus-like particles. Four steps of the purification process were studied, including a clarification step by depth filtration and filtration, an intermediate step by tangential flow filtration or multimodal chromatography, a capture step by ion exchange, heparin affinity and hydrophobic interaction chromatography and finally, a polishing step by size exclusion chromatography. In each step, the yields were evaluated by percentage of recovery of the particles of interest, purity, and elimination of main contaminants. Finally, a complete purification train was implemented using the best results obtained in each step. A final concentration of 1.40 × 1010 virus-like particles (VLPs)/mL with a purity of 64% after the polishing step was achieved, with host cell DNA and protein levels complaining with regulatory standards, and an overall recovery of 38%. This work has resulted in the development of a purification process for HIV-1 Gag-eGFP virus-like particles suitable for scale-up.
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Affiliation(s)
- Elianet Lorenzo
- Departament d'Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Laia Miranda
- Departament d'Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, Bellaterra, Spain
- University College London, London, UK
| | - Francesc Gòdia
- Departament d'Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Laura Cervera
- Departament d'Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, Bellaterra, Spain
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10
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Chibrikov V, Vakuliuk P, Sobczuk H. Sweet sorghum juice clarification and concentration: a review. Crit Rev Food Sci Nutr 2023:1-21. [PMID: 37578772 DOI: 10.1080/10408398.2023.2245033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Sweet sorghum is a promising biomaterial, considering its nutritional and energy value, unpretentiousness in cultivation and its promising economic parameters of processing. The concentrate of sweet sorghum juice is an outstanding material for food purposes, meeting the emerging trends of the industry. This review presents data on the physicochemical properties of sweet sorghum juice and sirup, as well as technological details on the processes of its pretreatment, clarification, and concentration. Physicochemical properties of raw juice of sweet sorghum, as well as purified juice and sirup, are discussed in terms of material pretreatment, methods of clarification and concentration, and storage conditions. Comprehensive theoretical principles, methodological details and explanations of the consistency of sweet sorghum juice processing are given. This work focuses entirely on the relationship between sweet sorghum juice treatment methods and its composition and provides versatile source of information for food science community, farmers, and entrepreneurs.
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Affiliation(s)
- Vadym Chibrikov
- Institute of Agrophysics, Polish Academy of Sciences, Lublin, Poland
| | | | - Henryk Sobczuk
- Institute of Technology and Life Sciences, Falenty, Poland
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Saballus M, Filz TJ, Pollard D, Kampmann M. Cost-efficient cell clarification using an intensified fluidized bed centrifugation platform approach. Biotechnol Bioeng 2023. [PMID: 37334463 DOI: 10.1002/bit.28475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 05/22/2023] [Accepted: 06/07/2023] [Indexed: 06/20/2023]
Abstract
The intensification of industrial biopharmaceutical production and the integration of process steps pave the way for patients to access affordable treatments. The predominantly batchwise biomanufacturing of established cell clarification technologies, stainless steel disc stack centrifugation (DSC) and single-use (SU) depth filtration (DF), pose technological and economical bottlenecks, that include low biomass loading capacities and low product recoveries. Therefore, a novel SU-based clarification platform was developed combining fluidized bed centrifugation (FBC) with integrated filtration. The feasibility of this approach was investigated for high cell concentration with more than 100E6 cells/mL. Furthermore, scalability to 200 L bioreactor scale was tested for moderate cell concentrations. In both trials, low harvest turbidities (4 NTU) and superior antibody recoveries (95%) were achieved. The impact on the overall economics of industrial SU biomanufacturing using an up-scaled FBC approach was compared with DSC and DF technologies for different process parameters. As a result, the FBC showed to be the most cost-effective alternative for annual mAb production below 500 kg. In addition, the FBC clarification of increasing cell concentrations was found to have minimal impact on overall process costs, in contrast to established technologies, demonstrating that the FBC approach is particularly suitable for intensified processes.
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Affiliation(s)
| | | | - David Pollard
- Sartorius, Corporate Research, Boston, Massachusetts, USA
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12
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Sarbatly R, Sariau J, Krishnaiah D. Recent Developments of Membrane Technology in the Clarification and Concentration of Fruit Juices. Food Eng Rev 2023; 15:420-437. [PMCID: PMC10257186 DOI: 10.1007/s12393-023-09346-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 05/21/2023] [Indexed: 11/06/2023]
Abstract
Fruit juices are traditionally processed thermally to avoid microorganisms’ growth and increase their shelf-life. The concentration of juices by thermal evaporation is carried out to reduce their volume and consequently the storage and transportation costs. However, many studies revealed that the high-temperature operation destroys many valuable nutrients and the aroma of the juice. Currently, membrane technology has emerged as an alternative to conventional processes to clarify and concentrate fruit juices due to its ability to improve juices’ safety, quality, and nutritional values. Low-cost, low-energy requirement, and minimal footprint make membrane technology an attractive choice for industrial adoption. The low-temperature operation that preserves the nutritional and sensorial quality of the juice can fulfill the market demand for healthy juice products. In this review, the pressure-driven membrane processes, including microfiltration, ultrafiltration, and reverse osmosis; osmotic distillation; membrane distillation; and forward osmosis that have been widely investigated in recent years, are discussed.
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Affiliation(s)
- Rosalam Sarbatly
- Chemical Engineering, Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, 88400 Sabah, Malaysia
- Nanofiber and Membrane Research Laboratory, Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, 88400 Sabah, Malaysia
| | - Jamilah Sariau
- Chemical Engineering, Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, 88400 Sabah, Malaysia
| | - Duduku Krishnaiah
- Department of Chemical Engineering, University of Anurag, Hyderabad, 500088 India
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13
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Chu LK, Borujeni EE, Xu X, Ghose S, Zydney AL. Comparison of host cell protein removal by depth filters with diatomaceous earth and synthetic silica filter aids using model proteins. Biotechnol Bioeng 2023. [PMID: 36929487 DOI: 10.1002/bit.28386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/24/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023]
Abstract
A number of studies have demonstrated that depth filtration can provide significant adsorptive removal of host cell proteins (HCP), but there is still considerable uncertainty regarding the underlying factors controlling HCP binding. This study compared the binding characteristics of two fine grade depth filters, the X0SP (polyacrylic fiber with a synthetic silica filter aid) and X0HC (cellulose fibers with diatomaceous earth as a filter aid), using a series of model proteins with well-defined physical characteristics. Protein binding to the X0SP filter was dominated by electrostatic interactions with greatest capacity for positively-charged proteins. In contrast, the X0HC filter showed greater binding of more hydrophobic proteins although electrostatic interactions also played a role. In addition, ovotransferrin showed unusually high binding capacity to the X0HC, likely due to interactions with metals in the diatomaceous earth. Scanning electron microscopy with energy dispersive spectroscopy was used to obtain additional understanding of the binding behavior. These results provide important insights into the physical phenomena governing HCP binding to both fully synthetic and natural (cellulose + diatomaceous earth) depth filters. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Liang-Kai Chu
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802
| | - Ehsan Espah Borujeni
- Bristol Myers Squibb, Biologics Process Development, Global Product Development and Supply, Devens, MA, 01434
| | - Xuankuo Xu
- Bristol Myers Squibb, Biologics Process Development, Global Product Development and Supply, Devens, MA, 01434
| | - Sanchayita Ghose
- Bristol Myers Squibb, Biologics Process Development, Global Product Development and Supply, Devens, MA, 01434
| | - Andrew L Zydney
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA, 16802
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Buchheim A, Kernberg OF, Netzer N, Buchheim P, Perchtold-Stefan C, Sperner-Unterweger B, Beckenbauer F, Labek K. Differential neural response to psychoanalytic intervention techniques during structural interviewing: A single-case analysis using EEG. Front Hum Neurosci 2023; 16:1054518. [PMID: 36684843 PMCID: PMC9846161 DOI: 10.3389/fnhum.2022.1054518] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 12/02/2022] [Indexed: 01/05/2023] Open
Abstract
Background Previous studies detected changes in the electroencephalographic (EEG) signal as an effect of psychoanalytic interventions. However, no study has investigated neural correlates of specific psychoanalytic interventions in the EEG power spectrum yet. In the present case study, we contrasted three types of interventions (clarification, confrontation, and interpretation) and a neutral control condition during a structural psychoanalytic interview conducted while EEG was recorded. Methods A 27-year-old male patient diagnosed with major depressive disorder and borderline personality disorder with recurrent suicidal and self-injurious behavior underwent a structural interview while recording EEG. Two independent experts selected by consensus the characteristic episodes of the four conditions (clarification, confrontation, interpretation, and neutral control) within the interview, which were included in the EEG analyses. Fast Fourier transformation (FFT) was applied to subsegments of the intervention type to analyze the EEG power spectra. Alpha and beta power from central, frontal, and parietal sites were considered in linear mixed-effects models with segments as a random factor with maximum-likelihood estimates due to the lack of balance in the length of the interview segments. Results The interventions "interpretation" and "confrontation" showed a significantly lower alpha power compared with the control condition in the central electrodes. In the frontal and parietal sites of the alpha power and all beta power sites, the omnibus tests (full model/model without intervention) and comparisons relative to control conditions showed no significant overall result or failed significance after alpha error correction. Conclusion Incisive interventions, such as confrontation with discrepancies and interpretation of unconscious intrapsychic conflicts, may have provoked temporary emotional lability, leading to a change in psychic processing akin to interference from external stimuli. This conclusion is consistent with the finding that interpretations, which are potentially the most concise interventions, had the strongest effects on alpha power. Using EEG during therapeutic psychoanalytic intervention techniques might be a helpful tool to evaluate differential responses to the psychotherapeutic process on a neural level. However, this single-case result has to be replicated in a larger sample and does not allow generalizations.
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Affiliation(s)
- Anna Buchheim
- Institute of Psychology, University of Innsbruck, Innsbruck, Austria,*Correspondence: Anna Buchheim,
| | - Otto F. Kernberg
- New York-Presbyterian Hospital–Westchester Division, New York, NY, United States
| | - Nikolaus Netzer
- Hermann Buhl Institute, University of Innsbruck, Eurac Research, Innsbruck, Austria,Eurac Research, Bolzano, Italy
| | - Peter Buchheim
- Department of Psychosomatic Medicine and Psychotherapy, Technical University of Munich, Munich, Germany
| | | | - Barbara Sperner-Unterweger
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical University Innsbruck, Innsbruck, Austria
| | | | - Karin Labek
- Institute of Psychology, University of Innsbruck, Innsbruck, Austria
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Behfar M, Heshmati A, Mehri F, Khaneghah AM. Removal of Ochratoxin A from Grape Juice by Clarification: A Response Surface Methodology Study. Foods 2022; 11:1432. [PMID: 35627005 DOI: 10.3390/foods11101432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/06/2022] [Accepted: 05/10/2022] [Indexed: 01/23/2023] Open
Abstract
This study achieved maximum removal of ochratoxin A (OTA) during the grape juice clarification process with minimal reduction in antioxidant compounds (phenolic acid, flavonoids, and antioxidant capacity by FRAP) by the RSM method. Independent variables included three types of clarifiers—gelatin, bentonite, and diatomite (diatomaceous earth)—at a concentration level of 0.25–0.75% and clarification time of 1–3 h. OTA was measured by high-performance liquid chromatography with fluorescence detection. Clarifying agent concentration and clarification time affected the reduction amount of OTA and antioxidant compounds in grape juice. There was a direct linear correlation between the reduction amounts of OTA and antioxidant compounds and capacity with the concentration of bentonite, gelatin, and diatomite, and the clarification time. The reduction amount of OTA and antioxidant capacity followed the linear mode. However, the decreased phenolic acid and flavonoid values followed the quadratic model. The study results showed that if the concentrations of bentonite, gelatin, and diatomite and clarification time were 0.45, 0.62, 0.25%, and 1 h, respectively, the maximum amount of OTA reduction (41.67%) occurred. Furthermore, the phenolic acid, flavonoid, and antioxidant activity decrease amounts were at their lowest levels, i.e., 23.86, 7.20, and 17.27%, respectively.
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Díaz-García V, Contreras-Trigo B, Rodríguez C, Coelho P, Oyarzún P. A Simple Yet Effective Preanalytical Strategy Enabling the Application of Aptamer-Conjugated Gold Nanoparticles for the Colorimetric Detection of Antibiotic Residues in Raw Milk. Sensors (Basel) 2022; 22:s22031281. [PMID: 35162026 PMCID: PMC8837955 DOI: 10.3390/s22031281] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 12/10/2022]
Abstract
The misuse of antibiotics in the cattle sector can lead to milk contamination, with concomitant effects on the dairy industry and human health. Biosensors can be applied in this field; however, the influence of the milk matrix on their activity has been poorly studied in light of the preanalytical process. Herein, aptamer-conjugated gold nanoparticles (nanoaptasensors) were investigated for the colorimetric detection in raw milk of four antibiotics used in cattle. The effect of milk components on the colorimetric response of the nanoaptasensors was analyzed by following the selective aggregation of the nanoparticles, using the absorption ratio A520/A720. A preanalytical strategy was developed to apply the nanoaptasensors to antibiotic-contaminated raw milk samples, which involves a clarification step with Carrez reagents followed by the removal of cations through dilution, chelation (EDTA) or precipitation (NaHCO3). The colorimetric signals were detected in spiked samples at concentrations of antibiotics as low as 0.25-fold the maximum residue limits (MRLs) for kanamycin (37.5 μg/L), oxytetracycline (25 μg/L), sulfadimethoxine (6.25 μg/L) and ampicillin (1 μg/L), according to European and Chilean legislation. Overall, we conclude that this methodology holds potential for the semiquantitative analysis of antibiotic residues in raw milk obtained directly from dairy farms.
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Ravlić S, Brgles M, Hiršl L, Jonjić S, Halassy B. Production- and Purification-Relevant Properties of Human and Murine Cytomegalovirus. Viruses 2021; 13:2481. [PMID: 34960750 DOI: 10.3390/v13122481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/01/2021] [Accepted: 12/09/2021] [Indexed: 11/17/2022] Open
Abstract
There is a large unmet need for a prophylactic vaccine against human cytomegalovirus (HCMV) to combat the ubiquitous infection that is ongoing with this pathogen. A vaccination against HCMV could protect immunocompromised patients and prevent birth defects caused by congenital HCMV infections. Moreover, cytomegalovirus (CMV) has a number of features that make it a very interesting vector platform for gene therapy. In both cases, preparation of a highly purified virus is a prerequisite for safe and effective application. Murine CMV (MCMV) is by far the most studied model for HCMV infections with regard to the principles that govern the immune surveillance of CMVs. Knowledge transfer from MCMV and mice to HCMV and humans could be facilitated by better understanding and characterization of the biological and biophysical properties of both viruses. We carried out a detailed investigation of HCMV and MCMV growth kinetics as well as stability under the influence of clarification and different storage conditions. Further, we investigated the possibilities to concentrate and purify both viruses by ultracentrifugation and ion-exchange chromatography. Defective enveloped particles were not separately analyzed; however, the behavior of exosomes was examined during all experiments. The effectiveness of procedures was monitored using CCID50 assay, Nanoparticle tracking analysis, ELISA for host cell proteins, and quantitative PCR for host cell DNA. MCMV generally proved to be more robust in handling. Despite its greater sensitivity, HCMV was efficiently (100% recovery) purified and concentrated by anion-exchange chromatography using QA monolithic support. The majority of the host genomic DNA as well as most of the host cell proteins were removed by this procedure.
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Wang J, Li GD, Yang JJ, Shen B, Pu CX, Zhu XX. Taxonomic studies on the genus Isotrema (Aristolochiaceae) from China III: I.pseudohei, a new species from Yunnan, Southwest China. PhytoKeys 2021; 186:43-52. [PMID: 34975274 PMCID: PMC8671711 DOI: 10.3897/phytokeys.186.63543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 10/25/2021] [Indexed: 06/14/2023]
Abstract
Isotremapseudohei, a new species from Yunnan, Southwest China, is described and illustrated. It is morphologically similar to I.hei and I.moupinense, but differs from the former in the colour of flower and throat, the size of throat and the shape of gynostemium lobes, and from the latter in the shape of lamina and gynostemium lobes.
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Affiliation(s)
- Jun Wang
- College of Life Sciences, Xinyang Normal University, Xinyang 464000, Henan, ChinaXinyang Normal UniversityXinyangChina
| | - Guo-Dong Li
- College of Life Sciences, Xinyang Normal University, Xinyang 464000, Henan, ChinaXinyang Normal UniversityXinyangChina
| | - Juan-Juan Yang
- College of Life Sciences, Xinyang Normal University, Xinyang 464000, Henan, ChinaXinyang Normal UniversityXinyangChina
| | - Bin Shen
- Shanghai Zuibaichi Park, Shanghai 201600, ChinaShanghai Zuibaichi ParkShanghaiChina
| | - Chun-Xia Pu
- Faculty of Traditional Chinese Pharmacy, Yunnan University of Chinese Medicine, Kunming 650500, Yunnan, ChinaYunnan University of Chinese MedicineKunmingChina
| | - Xin-Xin Zhu
- College of Life Sciences, Xinyang Normal University, Xinyang 464000, Henan, ChinaXinyang Normal UniversityXinyangChina
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Almeida A, Chau D, Coolidge T, El-Sabbahy H, Hager S, Jose K, Nakamura M, Voloshin A. Chromatographic capture of cells to achieve single stage clarification in recombinant protein purification. Biotechnol Prog 2021; 38:e3227. [PMID: 34854259 PMCID: PMC9286051 DOI: 10.1002/btpr.3227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/18/2021] [Accepted: 11/29/2021] [Indexed: 12/02/2022]
Abstract
Recent advancements in cell culture engineering have allowed drug manufacturers to achieve higher productivity by driving higher product titers through cell line engineering and high‐cell densities. However, these advancements have shifted the burden to clarification and downstream processing where the difficulties now revolve around removing higher levels of process‐ and product‐related impurities. As a result, a lot of research efforts have turned to developing new approaches and technologies or process optimization to still deliver high quality biological products while controlling cost of goods. Here, we explored the impact of a novel single use technology employing chromatographic principle‐based clarification for a process‐intensified cell line technology. In this study, a 16% economic benefit ($/g) was observed using a single‐use chromatographic clarification compared to traditional single‐use clarification technology by improving the overall product cost through decreased operational complexity, higher loading capacity, increased product recovery, and higher impurity clearance. In the end, the described novel chromatographic approach significantly simplified and enhanced the cell culture fluid harvest unit operation by combining the reduction of insoluble and key soluble contaminants of the harvest fluid into a single stage.
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Affiliation(s)
- Aaron Almeida
- Manufacturing Process Optimization, Catalent Biologics, Madison, Wisconsin, USA
| | - David Chau
- Separation and Purification Sciences Division, 3M Company, Saint Paul, Minnesota, USA
| | - Thomas Coolidge
- Manufacturing Process Optimization, Catalent Biologics, Madison, Wisconsin, USA
| | - Hani El-Sabbahy
- Separation and Purification Sciences Division, 3M Company, Saint Paul, Minnesota, USA
| | - Steven Hager
- Manufacturing Process Optimization, Catalent Biologics, Madison, Wisconsin, USA
| | - Kevin Jose
- Manufacturing Process Optimization, Catalent Biologics, Madison, Wisconsin, USA
| | - Masa Nakamura
- Separation and Purification Sciences Division, 3M Company, Saint Paul, Minnesota, USA
| | - Alexei Voloshin
- Separation and Purification Sciences Division, 3M Company, Saint Paul, Minnesota, USA
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20
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González-Domínguez I, Lorenzo E, Bernier A, Cervera L, Gòdia F, Kamen A. A Four-Step Purification Process for Gag VLPs: From Culture Supernatant to High-Purity Lyophilized Particles. Vaccines (Basel) 2021; 9:vaccines9101154. [PMID: 34696262 PMCID: PMC8539588 DOI: 10.3390/vaccines9101154] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 01/15/2023] Open
Abstract
Gag-based virus-like particles (VLPs) have high potential as scaffolds for the development of chimeric vaccines and delivery strategies. The production of purified preparations that can be preserved independently from cold chains is highly desirable to facilitate distribution and access worldwide. In this work, a nimble purification has been developed, facilitating the production of Gag VLPs. Suspension-adapted HEK 293 cells cultured in chemically defined cell culture media were used to produce the VLPs. A four-step downstream process (DSP) consisting of membrane filtration, ion-exchange chromatography, polishing, and lyophilization was developed. The purification of VLPs from other contaminants such as host cell proteins (HCP), double-stranded DNA, or extracellular vesicles (EVs) was confirmed after their DSP. A concentration of 2.2 ± 0.8 × 109 VLPs/mL in the lyophilized samples was obtained after its storage at room temperature for two months. Morphology and structural integrity of purified VLPs was assessed by cryo-TEM and NTA. Likewise, the purification methodologies proposed here could be easily scaled up and applied to purify similar enveloped viruses and vesicles.
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Affiliation(s)
- Irene González-Domínguez
- Departament d’Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; (E.L.); (L.C.); (F.G.)
- Correspondence:
| | - Elianet Lorenzo
- Departament d’Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; (E.L.); (L.C.); (F.G.)
| | - Alice Bernier
- Department of Bioengineering, McGill University, Montreal, QC H3A 0E9, Canada; (A.B.); (A.K.)
| | - Laura Cervera
- Departament d’Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; (E.L.); (L.C.); (F.G.)
| | - Francesc Gòdia
- Departament d’Enginyeria Química Biològica i Ambiental, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain; (E.L.); (L.C.); (F.G.)
| | - Amine Kamen
- Department of Bioengineering, McGill University, Montreal, QC H3A 0E9, Canada; (A.B.); (A.K.)
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21
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Ikram Ul Haq, Shakoor S, Nawaz A, Arshad Y, Mukhtar H. Purification and Characterization of Mannanase from Aspergillus awamori for Fruit Juice Clarification. Protein Pept Lett 2021; 28:459-468. [PMID: 32938340 DOI: 10.2174/0929866527666200916142305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 07/26/2020] [Accepted: 08/25/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Fruit juice clarification is a challenging aspect of beverage industry which needs to be addressed for economical and hygienic production of fruit juices. OBJECTIVE Current study is focused on the complete purification, characterization and thermodynamic analysis of an efficient mannanase enzyme to analyze its applicability in biological clarification fruit juice. METHODS Mannanase production using Aspergillus awamori IIB037 in a 25 L stirred fermenter at pre optimized reaction conditions was carried out. Enzyme purification was carried out via series of steps. Characterization of enzyme along with kinetics and thermodynamic studies was conducted. Purified and characterized enzyme was assessed for its applicability in fruit juice clarification through clarification experiments on fresh apple juice. RESULTS Purification fold of 3.98 was obtained along with 86.80% purification yield of mannanase with specific activity of 158.16 U/mg. The molecular size of purified enzyme was determined as 66 kDa. The enzyme depicted 56% residual activity at 60°C after 8 hrs. Thermodynamic studies of an enzyme revealed enthalpy of activation (ΔH) and activation energy (Ea) as 30.53KJ/mol, 27.76KJ/mol, respectively. The enzyme activity increased in the presence of ß-mercaptoethanol surprisingly. On the other hand, methyl alcohol, ethanol, Hg2+ and Cu2+ inhibited enzyme activity. The enzyme showed Km and Vmax values of 11.07 mM and 19.08 μM min-1 for Locust Bean Gum (LBG) under optimal conditions. Juice treated with mannanase showed decrease in absorbance and increase in reducing sugar content. CONCLUSION The current study demonstrated that mannanase from Aspergillus awamori in its purified form has significant characteristics to be employed industrially for juice clarification.
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Affiliation(s)
- Ikram Ul Haq
- Institute of Industrial Biotechnology, Government College University, Lahore, Pakistan
| | - Sheeba Shakoor
- Institute of Industrial Biotechnology, Government College University, Lahore, Pakistan
| | - Ali Nawaz
- Institute of Industrial Biotechnology, Government College University, Lahore, Pakistan
| | - Yesra Arshad
- Institute of Industrial Biotechnology, Government College University, Lahore, Pakistan
| | - Hamid Mukhtar
- Institute of Industrial Biotechnology, Government College University, Lahore, Pakistan
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Mejia JAA, Yáñez-Fernandez J. Clarification Processes of Orange Prickly Pear Juice ( Opuntia spp.) by Microfiltration. Membranes (Basel) 2021; 11:354. [PMID: 34065923 DOI: 10.3390/membranes11050354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 05/06/2021] [Accepted: 05/06/2021] [Indexed: 11/16/2022]
Abstract
In this study, fresh orange prickly pear juice (Opuntia spp.) was clarified by a cross-flow microfiltration (MF) process on a laboratory scale. The viability of the process-in terms of productivity (permeate flux of 77.80 L/h) and the rejection of selected membranes towards specific compounds-was analyzed. The quality of the clarified juice was also analyzed for total antioxidants (TEAC), betalains content (mg/100 g wet base), turbidity (NTU) and colorimetry parameters (L, a*, b*, Croma and H). The MF process permitted an excellent level of clarification, reducing the suspended solids and turbidity of the fresh juice. In the clarified juice, a decrease in total antioxidants (2.03 TEAC) and betalains content (4.54 mg/100 g wet basis) was observed as compared to the fresh juice. Furthermore, there were significant changes in color properties due to the effects of the L, a*, b*, C and h° values after removal of turbidity of the juice. The turbidity also decreased (from 164.33 to 0.37 NTU).
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Perreault V, Gouin N, Bérubé A, Villeneuve W, Pouliot Y, Doyen A. Effect of Pectinolytic Enzyme Pretreatment on the Clarification of Cranberry Juice by Ultrafiltration. Membranes (Basel) 2021; 11:55. [PMID: 33466623 PMCID: PMC7828648 DOI: 10.3390/membranes11010055] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 01/01/2023]
Abstract
Cranberries, mainly processed as juice, have garnered interest over the past decade due to their high content of phytochemical compounds related to promising health benefits. To meet consumer expectations, a juice clarification step is usually incorporated to remove suspended solids. The use of pectinolytic enzyme and membrane processes are commonly applied to the production of clarified juices, but no studies have been done on cranberry juice. In this study, the effects of 60 (D60) and 120 min (D120) of depectinization by pectinolytic enzymes coupled to clarification by ultrafiltration (UF) (membrane molecular weight cut-off (MWCO) of 50, 100 and 500 kDa) was evaluated on the filtration performance, membrane fouling and cranberry juice composition. Compared to fresh juice, depectinization for 60 and 120 min reduced the UF duration by 16.7 and 20 min, respectively. The best filtration performance, in terms of permeate fluxes, was obtained with the 500 kDa MWCO UF membrane despite the highest total flux decline (41.5 to 57.6%). The fouling layer at the membrane surface was composed of polyphenols and anthocyanins. Compared to fresh juice, anthocyanin decreased (44% and 58% for D60 and D120, respectively) in depectinized juices whereas proanthocyanidin (PAC) content increased by 16%. In view of the industrial application, a 60 min depectinization coupled to clarification by a 500 kDa UF membrane could be viewed as a good compromise between the enhancement of filtration performance and the loss of polyphenols and their fouling at the membrane surface.
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Affiliation(s)
| | | | | | | | | | - Alain Doyen
- Department of Food Sciences, Institute of Nutrition and Functional Foods (INAF), Université Laval, Quebec, QC G1V 0A6, Canada; (V.P.); (N.G.); (A.B.); (W.V.); (Y.P.)
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Molet-Rodríguez A, Martín-Belloso O, Salvia-Trujillo L. Formation and Stabilization of W 1/O/W 2 Emulsions with Gelled Lipid Phases. Molecules 2021; 26:E312. [PMID: 33435343 DOI: 10.3390/molecules26020312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/02/2021] [Accepted: 01/04/2021] [Indexed: 11/16/2022] Open
Abstract
Water-in-oil-in-water (W1/O/W2) emulsions are emulsion-based systems where the dispersed phase is an emulsion itself, offering great potential for the encapsulation of hydrophilic bioactive compounds. However, their formation and stabilization is still a challenge mainly due to water migration, which could be reduced by lipid phase gelation. This study aimed to assess the impact of lipid phase state being liquid or gelled using glyceryl stearate (GS) at 1% (w/w) as well as the hydrophilic emulsifier (T80: Tween 80 or lecithin) and the oil type (MCT:medium chain triglyceride or corn oil (CO) as long chain triglyceride) on the formation and stabilization of chlorophyllin W1/O/W2 emulsions. Their colloidal stability against temperature and light exposure conditions was evaluated. Gelling both lipid phases (MCT and CO) rendered smaller W1 droplets during the first emulsification step, followed by formation of W1/O/W2 emulsions with smaller W1/O droplet size and more stable against clarification. The stability of W1/O/W2 emulsions was sensitive to a temperature increase, which might be related to the lower gelling degree of the lipid phase at higher temperatures. This study provides valuable insight for the formation and stabilization of W1/O/W2 emulsions with gelled lipid phases as delivery systems of hydrophilic bioactive compounds under common food storage conditions.
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Tomczak W, Gryta M. Comparison of Polypropylene and Ceramic Microfiltration Membranes Applied for Separation of 1,3-PD Fermentation Broths and Saccharomyces cerevisiae Yeast Suspensions. Membranes (Basel) 2021; 11:44. [PMID: 33435635 DOI: 10.3390/membranes11010044] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/02/2021] [Accepted: 01/05/2021] [Indexed: 01/18/2023]
Abstract
In recent years, microfiltration (MF) has gained great interest as an excellent technique for clarification of biological suspensions. This paper addresses a direct comparison of efficiency, performance and susceptibility to cleaning of the ceramic and polymeric MF membranes applied for purification of 1,3-propanediol (1,3-PD) fermentation broths and suspensions of yeast Saccharomyces cerevisiae. For this purpose, ceramic, titanium dioxide (TiO2) based membranes and polypropylene (PP) membranes were used. It has been found that both TiO2 and PP membranes provide sterile permeate during filtration of 1,3-PD broths. However, the ceramic membrane, due to the smaller pore diameter, allowed obtaining a better quality permeate. All the membranes used were highly susceptible to fouling with the components of the clarified broths and yeast suspensions. The significant impact of the feed flow velocity and fermentation broth composition on the relative permeate flux has been demonstrated. Suitable cleaning agents with selected concentration and duration of action effectively cleaned the ceramic membrane. In turn, the use of aggressive cleaning solutions led to degradation of the PP membranes matrix. Findings of this study add to a growing body of literature on the use of ceramic and polypropylene MF membranes for the clarification of biological suspensions.
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van Wyk NC. Care for carers: A concept analysis of support for carers of ill relatives. Nurs Forum 2020; 56:202-207. [PMID: 33125730 DOI: 10.1111/nuf.12520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/04/2020] [Accepted: 10/09/2020] [Indexed: 11/28/2022]
Abstract
The aim of the study is to clarify the concept "care for carers," and enhance our understanding of caring for carers of ill relatives. Healthcare professionals often refer to "care for carers" when discussing methods to support the carers of ill family relatives. These carers do not always receive the support they need. A literature search of electronic databases and search engines, using the keywords carer, caregiver, caring for the carer, caring for the caregiver was done. Peer-reviewed research articles published between 2014 and 2019 and written in the English language were analyzed. Following retrieval, research articles were analyzed to describe the uses, attributes, antecedents, consequences, and empirical referents of the concept "care for carers." Research articles describing borderline, related, contrary, and illegitimate examples were included. "Care for carers" addresses the unique support needs of those taking care of ill family members. Carers may derive a sense of empowerment from receiving individualized and proactively rendered support. Carers should be supported to develop control over their circumstances, to find meaning in their caring, to become resilient when experiencing challenges, and to confirm their identity as carers of their ill relatives.
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Affiliation(s)
- Neltjie C van Wyk
- Department of Nursing Science, University of Pretoria, Pretoria, South Africa
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Conidi C, Drioli E, Cassano A. Perspective of Membrane Technology in Pomegranate Juice Processing: A Review. Foods 2020; 9:E889. [PMID: 32645857 PMCID: PMC7404809 DOI: 10.3390/foods9070889] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/05/2020] [Accepted: 06/12/2020] [Indexed: 12/20/2022] Open
Abstract
Pomegranate (Punica granatum L.) juice is well recognized for its high content of phytochemicals with proven health-promoting effects. Conventional processing techniques including clarification with fining agents, pasteurization and thermal concentration have significant influences on bioactive compounds and antioxidant activity of the juice. The growing consumers demand for high-quality pomegranate juice as well as the industrial interest for the production of functional foods, nutraceuticals, and cosmetics from its bioactive compounds have promoted the interest for minimal processing technologies. In this context, membrane-based operations represent an innovative approach to improve the overall quality of pomegranate juice production. This review focuses on the recent advances and developments related to the application of membrane technology in pomegranate juice processing. Conventional pressure-driven membrane operations and innovative membrane operations, such as osmotic distillation and pervaporation, are discussed in relation to their potential in juice clarification, fractionation, concentration and aroma recovery. Their implementation in integrated systems offer new opportunities to improve the healthiness and quality of the juice as well as to recover, purify and concentrate bioactive compounds for the formulation of functional ingredients.
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Affiliation(s)
- Carmela Conidi
- Institute on Membrane Technology, ITM-CNR, Via P. Bucci 17/C, 87036 Rende (CS), Italy; (C.C.); (E.D.)
| | - Enrico Drioli
- Institute on Membrane Technology, ITM-CNR, Via P. Bucci 17/C, 87036 Rende (CS), Italy; (C.C.); (E.D.)
- Department of Engineering and of the Environment, University of Calabria, Via P. Bucci 45/A, 87036 Rende (CS), Italy
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
- Center of Excellence in Desalination Technology, King Abdulaziz University (KAU-CEDT), Jeddah 21589, Saudi Arabia
| | - Alfredo Cassano
- Institute on Membrane Technology, ITM-CNR, Via P. Bucci 17/C, 87036 Rende (CS), Italy; (C.C.); (E.D.)
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Nejatishahidein N, Borujeni EE, Roush DJ, Zydney AL. Effectiveness of host cell protein removal using depth filtration with a filter containing diatomaceous earth. Biotechnol Prog 2020; 36:e3028. [PMID: 32447812 DOI: 10.1002/btpr.3028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 05/13/2020] [Accepted: 05/19/2020] [Indexed: 11/09/2022]
Abstract
The increased cell density and product titer in biomanufacturing have led to greater use of depth filtration as part of the initial clarification of cell culture fluid, either as a stand-alone unit operation or after centrifugation. Several recent studies have shown that depth filters can also reduce the concentration of smaller impurities like host cell proteins (HCP) and DNA, decreasing the burden on subsequent chromatographic operations. The objective of this study was to evaluate the HCP removal properties of the Pall PDH4 depth filter media, a model depth filter containing diatomaceous earth, cellulose fibers, and a binder. Experiments were performed with both cell culture fluid (CCF) and a series of model proteins with defined pI, molecular weight, and hydrophobicity chosen to match the range of typical HCP. The location of adsorbed (fluorescently labeled) proteins within the depth filters was determined using confocal scanning laser microscopy. Protein binding was greater for proteins that were positively charged and more hydrophobic, consistent with adsorption to the negatively charged diatomaceous earth. The lowest degree of binding was seen with proteins near their pI, which were poorly removed by this filter. These results provide new mechanistic insights into the factors governing the filter capacity and performance characteristics of depth filters containing diatomaceous earth that are widely used in the clarification of CCF.
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Affiliation(s)
- Negin Nejatishahidein
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Ehsan E Borujeni
- Biologics Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey, USA
| | - David J Roush
- Biologics Process Research and Development, Merck & Co., Inc., Kenilworth, New Jersey, USA
| | - Andrew L Zydney
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
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Mora F, Pérez K, Quezada C, Herrera C, Cassano A, Ruby-Figueroa R. Impact of Membrane Pore Size on the Clarification Performance of Grape Marc Extract by Microfiltration. Membranes (Basel) 2019; 9:membranes9110146. [PMID: 31698840 PMCID: PMC6918468 DOI: 10.3390/membranes9110146] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 10/31/2019] [Accepted: 11/04/2019] [Indexed: 01/11/2023]
Abstract
The influence of membrane pore size on the permeate flux, fouling mechanism, and rejection of soluble and suspended solids, as well as of phenolics and anthocyanins, in the clarification of grape marc extract by microfiltration (MF) was studied. MF was operated by using three monotubular ceramic membranes with a pore size of 0.14, 0.2, and 0.8 µm, respectively, according to a batch concentration configuration in selected operating conditions (2.25 bar as operating pressure, 4.93 L/min as feed flow rate, and 25 °C as operating temperature). No significant differences in the permeate flux values were appreciated despite the difference in pore size. The mathematical analyses of the flux behavior revealed that intermediate pore blocking is the predominant mechanism for 0.14 and 0.2 µm membranes, whereas complete pore blocking prevails for the 0.8 µm membrane. Differences in the fouling mechanism were associated with differences in the total phenols rejection: the highest rejection was observed for the 0.8 µm membrane followed by 0.2 and 0.14 µm membranes. All selected membranes showed low rejection of sugars, with values lower than 10%, and no retention towards anthocyanins. All the clarified extracts showed a turbidity lower than 4.87 NTU. Based on the experimental results, the 0.14 µm membrane appeared as the best option for the clarification of grape marc extract.
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Affiliation(s)
- Francisca Mora
- Department of Chemistry, Universidad Tecnológica Metropolitana, Las Palmeras 3360, Ñuñoa, Santiago 7800003, Chile;
| | - Karla Pérez
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile; (K.P.); (C.Q.); (C.H.)
| | - Carolina Quezada
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile; (K.P.); (C.Q.); (C.H.)
| | - Carla Herrera
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile; (K.P.); (C.Q.); (C.H.)
| | - Alfredo Cassano
- Institute on Membrane Technology, ITM-CNR, c/o University of Calabria, via P. Bucci, 17/C, I-87030 Rende, Italy;
| | - René Ruby-Figueroa
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile; (K.P.); (C.Q.); (C.H.)
- Correspondence: ; Tel.: +56-2-2787-7907
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Yang KR, Yu HC, Huang CY, Kuo JM, Chang C, Shieh CJ, Kuo CH. Bioprocessed Production of Resveratrol-Enriched Rice Wine: Simultaneous Rice Wine Fermentation, Extraction, and Transformation of Piceid to Resveratrol from Polygonum cuspidatum Roots. Foods 2019; 8:E258. [PMID: 31311091 DOI: 10.3390/foods8070258] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 12/11/2022] Open
Abstract
A new bioprocess to produce resveratrol-enriched rice wine was established and the effects of adding Polygonum cuspidatum root powder to rice wine fermentation were investigated. In this new process, piceid and resveratrol were extracted from P. cuspidatum roots to rice wine and piceid was converted to resveratrol by β-glucosidase during fermentation. After 10 days co-fermentation, rice wine with high levels of resveratrol was obtained, which contained ~14% (v/v) ethanol, 122 mg/L piceid, and 86 mg/L resveratrol. The resveratrol-enriched rice wine had enhanced antioxidant activity with significantly stronger 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferric ion reducing power, and ferrous ion chelating capability. Ultrafiltration (UF) was employed in this study using hollow fibers to clarify the end product, increase shelf life without heat treatment, and maintain the quality of the phenolic compounds. The boiled and UF-treated rice wine were evaluated for ethanol, piceid, resveratrol, clarity, aerobic plate count, total acidity, pH, reducing sugars, and amino acids. The quality of the resveratrol-enriched rice wine was maintained after four weeks storage at normal refrigeration temperatures.
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Kruse T, Schmidt A, Kampmann M, Strube J. Integrated Clarification and Purification of Monoclonal Antibodies by Membrane Based Separation of Aqueous Two-Phase Systems. Antibodies (Basel) 2019; 8:antib8030040. [PMID: 31544846 PMCID: PMC6784141 DOI: 10.3390/antib8030040] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/18/2019] [Accepted: 06/18/2019] [Indexed: 11/16/2022] Open
Abstract
Therapeutic monoclonal antibodies (mAb) are used for the treatment of numerous serious diseases, which have led to an increasing demand over the last decades. Increased cell density and mAb titer of the cultivation broth lead to great challenges for the subsequent clarification and capture operations in the downstream process. As an alternative approach to the conventional downstream process, a selective mAb extraction via an aqueous two-phase system (ATPS) directly from the cultivation broth of a mAb producing industrial relevant chinese hamster ovary (CHO) cell line was investigated. An efficient purification of the mAb was accomplished by the ATPS composition. The phase separation was realized by a newly developed membrane based phase separator. Moreover, a complete cell removal was integrated into this process by the used membrane. A selectivity between both phases was achieved by membrane modification. Yields up to 93% in the light phase and removal of process related impurities were obtained after aqueous two-phase extraction (ATPE). Phase separation performance as well as contact angles on the membrane were characterized for different ATPS. ATPE directly from the cultivation broth in combination with the new membrane based phase separation led to a mAb yield of 78% with a simultaneous reduction of deoxyribonucleic acid (DNA) and host cell protein (HCP) load.
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Affiliation(s)
- Thomas Kruse
- Institute for Separation and Process Technology, Clausthal University of Technology, Leibnizstraße 15, 38678 Clausthal-Zellerfeld, Germany
- Sartorius Stedim Biotech GmbH, August Spindler Straße 11, 37079 Göttingen, Germany
| | - Axel Schmidt
- Institute for Separation and Process Technology, Clausthal University of Technology, Leibnizstraße 15, 38678 Clausthal-Zellerfeld, Germany
| | - Markus Kampmann
- Sartorius Stedim Biotech GmbH, August Spindler Straße 11, 37079 Göttingen, Germany
| | - Jochen Strube
- Institute for Separation and Process Technology, Clausthal University of Technology, Leibnizstraße 15, 38678 Clausthal-Zellerfeld, Germany.
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Laakso M, Salmenlinna I, Aaltonen T, Koskela I, Ruusuvuori J. Open-class repair initiations in conversations involving middle-aged hearing aid users with mild to moderate loss. Int J Lang Commun Disord 2019; 54:620-633. [PMID: 30859679 DOI: 10.1111/1460-6984.12466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 02/06/2019] [Accepted: 02/15/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND To manage conversational breakdowns, individuals with hearing loss (HL) often have to request their interlocutors to repeat or clarify. AIMS To examine how middle-aged hearing aid (HA) users manage conversational breakdowns by using open-class repair initiations (e.g., questions such as sorry, what and huh), and whether their use of repair initiations differs from their normally hearing interlocutors. METHODS & PROCEDURES Eighteen 45-64-year-old adults with acquired mild to moderate HL participated in the study. The participants were videotaped in everyday interactions at their homes and workplaces and in clinical encounters with hearing health professionals. Interactions were transcribed and open-class repair initiations of participants with HL and their interlocutors were identified using conversation analysis. The frequencies of initiations were analyzed statistically between the groups, and the contexts and structure of repair sequences dealing with communication breakdown were analyzed. OUTCOMES & RESULTS Before acquiring HA the participants with HL reported intense use of open-class repair initiation. After HAs were acquired, there was no statistically significant difference in the frequency of open-class repair initiations between HA users and their interlocutors. The most common means for open-class repair initiation in the data was interrogative word mitä ('what'). Vocalization hä ('huh'), apologetic expression anteeksi ('sorry') and clausal initiations (e.g., 'what did you say'/'I didn't hear') occurred less often. Open-class repair initiations emerged in contexts where they typically occur in conversation, such as topical shifts, overlapping talk and action, background noise, and disagreements. When used, open-class repair initiations most often led to repetition by the interlocutor, which immediately repaired the conversational breakdown. Long clarification sequences with multiple repair initiations did not occur. CONCLUSIONS & IMPLICATIONS Participants with mild to moderate HL using hearing amplification initiate open-class repair similarly to their normally hearing conversational partners when the frequency, types, contexts and structure of repair are considered. The findings diminish the stigma related to HL, HAs and the use of open-class repair. The findings suggest that HA amplifies hearing successfully in everyday conversation when the level of HL is mild to moderate. However, the evidence for the benefit of HAs remains indirect.
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Affiliation(s)
- Minna Laakso
- University of Helsinki, Faculty of Medicine, Department of Psychology and Logopedics, Helsinki, Finland
| | - Inkeri Salmenlinna
- University of Helsinki, Faculty of Medicine, Department of Psychology and Logopedics, Helsinki, Finland
| | - Tarja Aaltonen
- University of Helsinki, Faculty of Medicine, Department of Psychology and Logopedics, Helsinki, Finland
| | - Inka Koskela
- Finnish Institute of Occupational Health, Helsinki, Finland
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Abstract
Peter Draper has offered a critique of concept analysis in nursing, suggesting that many concept analysis studies can be regarded as low-grade literature reviews. Although I will argue en passant that he was right, defending Draper is not my main concern in this paper. Instead, I undertake a close reading of a single study, and identify a series of puzzles about what it says. The puzzles pertain to the distinction between concept and phenomenon; the function of definition; discriminating between the concept of interest and other concepts; how defining attributes are derived; in what sense concept analysis clarifies the concept; whether concept analysis can adjudicate current debates; the role of model cases. The point is to show how a precise and detailed interrogation of this kind sets an agenda of questions which can be asked about other examples of the same genre. The approach gives rise to concerns about the politics of reading in the current academic environment, and I refer to these concerns briefly at the end.
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Affiliation(s)
- John Paley
- College of Health, Life and Environmental Science, University of Worcester, Worcester, UK
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35
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El-Sabbahy H, Ward D, Ogonah O, Deakin L, Jellum GM, Bracewell DG. The effect of feed quality due to clarification strategy on the design and performance of protein A periodic counter-current chromatography. Biotechnol Prog 2018; 34:1380-1392. [PMID: 30281957 PMCID: PMC6902848 DOI: 10.1002/btpr.2709] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 08/13/2018] [Indexed: 11/30/2022]
Abstract
The impact of two different quality feeds, derived using two different harvest clarification processes, on protein A periodic counter‐current chromatography (PCC) design and performance is investigated. Data from batch experiments were input into a model to design optimal PCC operating parameters specific to each feed material. The two clarification methods were: depth filtration using a wetlaid matrix which has Q‐functionality; and a combination of depth filtration and chromatographic clarification, using a Q‐functional nonwoven with a high anion exchange capacity (Emphaze™ AEX Hybrid Purifier) in which key impurities such as host cell DNA (HCDNA) and host cell proteins (HCP) are removed. The model predicted 34% better productivity for the chromatographically clarified cell culture fluid (CCCF) using a 4 column system, and productivity gains of 28% using only 3 columns enabling the option to simplify the protein A PCC strategy. Experimental validation of the predicted optimized PCC operating parameters using industrially relevant monoclonal antibody (mAb) CCCF feedstock over 100 cycles showed productivity gains of 49% for the chromatographically clarified material. HCP concentration was 11‐fold lower, and HCDNA concentration was reduced by 4.4 Log Reduction Value (LRV) in the protein A PCC eluates. This work, therefore, demonstrates that the removal of HCDNA and HCP during clarification is an effective strategy for improving protein A PCC performance. This was achieved using the Emphaze™ AEX Hybrid Purifier which can be easily incorporated into a batch or continuous process, in a scalable fashion, without adding additional separate unit operations. © 2018 American Institute of Chemical Engineers Biotechnol. Prog., 34:1380–1392, 2018
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Affiliation(s)
- Hani El-Sabbahy
- Separation and Purification Sciences Div., 3M United Kingdom PLC, 3M Centre, Bracknell, RG12 8HT, U.K
| | - David Ward
- Dept. of Biochemical Engineering, University College London, London, WC1E 6BT, U.K
| | - Olotu Ogonah
- Dept. of Biochemical Engineering, University College London, London, WC1E 6BT, U.K
| | - Lynne Deakin
- Separation and Purification Sciences Div., 3M United Kingdom PLC, 3M Centre, Bracknell, RG12 8HT, U.K
| | - Gregory M Jellum
- Separation and Purification Sciences Div., 3M Centre, St. Paul, MN, 55144
| | - Daniel G Bracewell
- Dept. of Biochemical Engineering, University College London, London, WC1E 6BT, UK
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Poonsuk K, Giménez-Lirola LG, Magtoto RL, Ji J, Baum DH, Rademacher CJ, Brown JT, Zhang J, Wang C, Main RG, Zimmerman JJ. The effect of chemical clarification of oral fluids on porcine epidemic diarrhea virus antibody responses. J Vet Diagn Invest 2018; 30:937-941. [PMID: 30204059 DOI: 10.1177/1040638718798672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Routine testing of breeding herd oral fluid (OF) samples for porcine epidemic diarrhea virus (PEDV) IgG and/or IgA is used to track levels of PEDV immunity over time. However, OFs contain particles of feed, feces, and inorganic material that detract from the quality of the sample. We clarified swine OF samples using lyophilized chitosan-based formulas (A-C) tested by PEDV IgG and IgA ELISAs. To evaluate both the immediate and residual effects of treatment on antibody detection, samples were tested immediately post-treatment, then stored at 4°C and retested at 2, 4, and 6 days post-treatment (DPT). Formulations were shown to effectively clarify samples. Statistical analysis comparing treated to untreated OF samples at 0 DPT found that neither chitosan nor Tween 20 affected the OF ELISA IgA and IgG sample-to-positive (S/P) ratio results ( p > 0.05). Furthermore, pairwise comparisons of 0 DPT to 2, 4, and 6 DPT results detected no significant differences ( p > 0.05) in IgA and IgG S/P ratios (i.e., treated OF samples were stable over time). Therefore, chitosan efficiently clarified OF specimens without affecting the results of the PEDV IgG and IgA antibody ELISAs.
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Affiliation(s)
- Korakrit Poonsuk
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Luis G Giménez-Lirola
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Ronaldo L Magtoto
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Ju Ji
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - David H Baum
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Christopher J Rademacher
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Justin T Brown
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Jianqiang Zhang
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Chong Wang
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Rodger G Main
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
| | - Jeffrey J Zimmerman
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine (Poonsuk, Giménez-Lirola, Magtoto, Baum, Rademacher, Brown, Zhang, Main, Zimmerman), Iowa State University, Ames, IA.,Department of Statistics, College of Liberal Arts and Sciences (Ji, Wang), Iowa State University, Ames, IA
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Ratanapariyanuch K, Shim YY, Emami S, Reaney MJT. Production of Protein Concentrate and 1,3-Propanediol by Wheat-Based Thin Stillage Fermentation. J Agric Food Chem 2017; 65:3858-3867. [PMID: 28453269 DOI: 10.1021/acs.jafc.7b00772] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fermentation of wheat with yeast produces thin stillage (W-TS) and distiller's wet grains. A subsequent fermentation of W-TS (two-stage fermentation, TSF) with endemic bacteria at 25 and 37 °C decreased glycerol and lactic acid concentrations, while 1,3-propanediol (1,3-PD) and acetic acid accumulated with greater 1,3-PD and acetic acid produced at 37 °C. During TSF, W-TS colloids coagulated and floated in the fermentation medium producing separable liquid and slurry fractions. The predominant endemic bacteria in W-TS were Lactobacillus panis, L. gallinarum, and L. helveticus, and this makeup did not change substantially as fermentation progressed. As nutrients were exhausted, floating particles precipitated. Protein contents of slurry and clarified liquid increased and decreased, respectively, as TSF progressed. The liquid was easily filtered through an ultrafiltration membrane. These results suggested that TSF is a novel method for W-TS clarification and production of protein concentrates and 1,3-PD from W-TS.
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Affiliation(s)
- Kornsulee Ratanapariyanuch
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Youn Young Shim
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
- Prairie Tide Chemicals Incorporated, 102 Melville Street, Saskatoon, Saskatchewan S7J 0R1, Canada
- Guangdong Saskatchewan Oilseed Joint Laboratory, Department of Food Science and Engineering, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Shahram Emami
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Martin J T Reaney
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
- Prairie Tide Chemicals Incorporated, 102 Melville Street, Saskatoon, Saskatchewan S7J 0R1, Canada
- Guangdong Saskatchewan Oilseed Joint Laboratory, Department of Food Science and Engineering, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
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Hurtado A, Guàrdia MD, Picouet P, Jofré A, Ros JM, Bañón S. Stabilization of red fruit-based smoothies by high-pressure processing. Part A. Effects on microbial growth, enzyme activity, antioxidant capacity and physical stability. J Sci Food Agric 2017; 97:770-776. [PMID: 27170492 DOI: 10.1002/jsfa.7796] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 04/28/2016] [Accepted: 05/01/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Non-thermal pasteurization by high-pressure processing (HPP) is increasingly replacing thermal processing (TP) to maintain the properties of fresh fruit products. However, most of the research on HPP-fruit products only partially addresses fruit-pressure interaction, which limits its practical interest. The objective of this study was to assess the use of a mild HPP treatment to stabilize red fruit-based smoothies (microbial, enzymatic, oxidative and physical stability). RESULTS HPP (350 MPa/10 °C/5 min) was slightly less effective than TP (85 °C/7 min) in inactivating microbes (mesophilic and psychrophilic bacteria, coliforms, yeasts and moulds) in smoothies kept at 4 °C for up to 28 days. The main limitation of using HPP was its low efficacy in inactivating oxidative (polyphenol oxidase and peroxidase) and hydrolytic (pectin methyl esterase) enzymes. Data on antioxidant status, colour parameters, browning index, transmittance, turbidity and viscosity confirmed that the HPP-smoothies have a greater tendency towards oxidation and clarification, which might lead to undesirable sensory and nutritional changes (see Part B). CONCLUSION The microbial quality of smoothies was adequately controlled by mild HPP treatment without affecting their physical-chemical characteristics; however, oxidative and hydrolytic enzymes are highly pressure-resistant, which suggests that additional strategies should be used to stabilize smoothies. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Adriana Hurtado
- Department of Food Science & Technology and Human Nutrition, Faculty of Veterinary Science, University of Murcia, Espinardo, E-30100, Murcia, Spain
| | - Maria Dolors Guàrdia
- IRTA-Food Technology Program, Finca Camps i Armet, Monells, E-17121, Girona, Spain
| | - Pierre Picouet
- IRTA-Food Technology Program, Finca Camps i Armet, Monells, E-17121, Girona, Spain
| | - Anna Jofré
- IRTA-Food Safety Program, Finca Camps i Armet, Monells, E-17121, Girona, Spain
| | - José María Ros
- Department of Food Science & Technology and Human Nutrition, Faculty of Veterinary Science, University of Murcia, Espinardo, E-30100, Murcia, Spain
| | - Sancho Bañón
- Department of Food Science & Technology and Human Nutrition, Faculty of Veterinary Science, University of Murcia, Espinardo, E-30100, Murcia, Spain
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Yin L, Ye J, Kuang S, Guan Y, You R. Induction, purification, and characterization of a thermo and pH stable laccase from Abortiporus biennis J2 and its application on the clarification of litchi juice. Biosci Biotechnol Biochem 2017; 81:1033-1040. [PMID: 28095737 DOI: 10.1080/09168451.2017.1279850] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A fungus J2 producing laccase with high yield was screened in soils and identified as Abortiporus biennis. The production of laccase was induced by 0.1 mM Cu2+, 0.1 mM tannic acid, and 0.5 M ethanol. The laccase from Abortiporus biennis J2 was purified to electrophoretic homogeneity by a couple of steps. The N-terminal amino acid sequence of the enzyme was AIGPTADLNISNADI. The properties of the purified laccase were investigated. The result showed the laccase from Abortiporus biennis J2 is a thermo and pH stable enzyme. The laccase activity was inhibited by Hg2+, Cd2+, Fe2+, Ag+, Cu2+, and Zn2+, while promoted by Mg2+, Mn2+ at 10 mM level. Purified laccase was used to the clarification of litchi juice. After treatment with this laccase, the phenolic content of litchi juice had been found to be greatly reduced along with an increase in the clarity of the juice. The result indicated the potential of this laccase for application in juice procession.
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Affiliation(s)
- Liang Yin
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Jiayin Ye
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Sibi Kuang
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Yanqing Guan
- a School of Life Science , South China Normal University , Guangzhou , China
| | - Rong You
- a School of Life Science , South China Normal University , Guangzhou , China
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40
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Gutierre RC, Vannucci Campos D, Mortara RA, Coppi AA, Arida RM. Reflection imaging of China ink-perfused brain vasculature using confocal laser-scanning microscopy after clarification of brain tissue by the Spalteholz method. J Anat 2017; 230:601-606. [PMID: 28054714 DOI: 10.1111/joa.12578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2016] [Indexed: 11/28/2022] Open
Abstract
Confocal laser-scanning microscopy is a useful tool for visualizing neurons and glia in transparent preparations of brain tissue from laboratory animals. Currently, imaging capillaries and venules in transparent brain tissues requires the use of fluorescent proteins. Here, we show that vessels can be imaged by confocal laser-scanning microscopy in transparent cortical, hippocampal and cerebellar preparations after clarification of China ink-injected specimens by the Spalteholz method. This method may be suitable for global, three-dimensional, quantitative analyses of vessels, including stereological estimations of total volume and length and of surface area of vessels, which constitute indirect approaches to investigate angiogenesis.
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Affiliation(s)
- R C Gutierre
- Department of Neurology and Neurosurgery, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil.,Department of Physiology, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Braz
| | - D Vannucci Campos
- Department of Neurology and Neurosurgery, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil.,Department of Physiology, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Braz
| | - R A Mortara
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - A A Coppi
- Faculty of Health and Medical Sciences, School of Veterinary Medicine, University of Surrey, Guildford, Surrey, UK
| | - R M Arida
- Department of Neurology and Neurosurgery, Escola Paulista de Medicina, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
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41
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Abstract
Two-stage fermentation (TSF) of saccharified wheat with a consortium of endemic lactobacilli produced CO2 and induced colloid separation of fermented solution to produce a protein concentrate (PC). Protein-rich slurry (50%, db) was obtained by decanting solution or skimming floating material during or after TSF. Washing and drying processes were explored to improve protein content, extend storage life of slurry, and yield converted stillage for compound recovery. Centrifuging and washing slurry afforded a PC and clarified solution. PC protein content increased to 60% (w/w, db). The PC was dried in a spray dryer or drum dryer or tray dryer. Dried PC water activity ranged 0.23-0.30. The dried PC lysine content was low, but lysine availability (95%) was excellent. Liquid from TSF and washing was readily microfiltered. Mass recovery of protein, glycerol, 1,3-propanediol, lactic acid, acetic acid, and glycerylphosphorylcholine from combined TSF, washing, and filtration were 66, 76, 72, 77, 74, and 84%, respectively.
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Affiliation(s)
- Kornsulee Ratanapariyanuch
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Youn Young Shim
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
- Prairie Tide Chemicals Inc. , 102 Melville Street, Saskatoon, Saskatchewan S7J 0R1, Canada
- Guangdong Saskatchewan Oilseed Joint Laboratory, Department of Food Science and Engineering, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
| | - Shahram Emami
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
| | - Martin J T Reaney
- Department of Plant Sciences, University of Saskatchewan , 51 Campus Drive, Saskatoon, Saskatchewan S7N 5A8, Canada
- Prairie Tide Chemicals Inc. , 102 Melville Street, Saskatoon, Saskatchewan S7J 0R1, Canada
- Guangdong Saskatchewan Oilseed Joint Laboratory, Department of Food Science and Engineering, Jinan University , 601 Huangpu Avenue West, Guangzhou, Guangdong 510632, China
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Singh N, Arunkumar A, Peck M, Voloshin AM, Moreno AM, Tan Z, Hester J, Borys MC, Li ZJ. Development of adsorptive hybrid filters to enable two-step purification of biologics. MAbs 2016; 9:350-363. [PMID: 27929735 PMCID: PMC5297532 DOI: 10.1080/19420862.2016.1267091] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/18/2016] [Accepted: 11/28/2016] [Indexed: 10/20/2022] Open
Abstract
Recent progress in mammalian cell culture process has resulted in significantly increased product titers, but also a substantial increase in process- and product-related impurities. Due to the diverse physicochemical properties of these impurities, there is constant need for new technologies that offer higher productivity and improved economics without sacrificing the process robustness required to meet final drug substance specifications. Here, we examined the use of new synthetic adsorptive hybrid filters (AHF) modified with the high binding capacity of quaternary amine (Emphaze™ AEX) and salt-tolerant biomimetic (Emphaze™ ST-AEX) ligands for clearance of process-related impurities like host cell protein (HCP), residual DNA, and virus. The potential to remove soluble aggregates was also examined. Our aim was to develop a mechanistic understanding of the interactions governing adsorptive removal of impurities during filtration by evaluating the effect of various filter types, feed streams, and process conditions on impurity removal. The ionic capacity of these filters was measured and correlated with their ability to remove impurities for multiple molecules. The ionic capacity of AHF significantly exceeded that of traditional adsorptive depth filters (ADF) by 40% for the Emphaze™ AEX and by 700% for the Emphaze™ ST-AEX, providing substantially higher reduction of soluble anionic impurities, including DNA, HCPs and model virus. Nevertheless, we determined that ADF with filter aid provided additional hydrophobic functionality that resulted in removal of higher molecular weight species than AHF. Implementing AHF demonstrated improved process-related impurity removal and viral clearance after Protein A chromatography and enabled a two-step purification process. The consequences of enhanced process performance are far reaching because it allows the downstream polishing train to be restructured and simplified, and chromatographic purity standards to be met with a reduced number of chromatographic steps.
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Affiliation(s)
- Nripen Singh
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Abhiram Arunkumar
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Michael Peck
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Alexei M. Voloshin
- Life Science Process Technologies, 3M Purification Inc., St Paul, MN, USA
| | - Angela M. Moreno
- Life Science Process Technologies, 3M Purification Inc., St Paul, MN, USA
| | - Zhijun Tan
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Jonathan Hester
- Life Science Process Technologies, 3M Purification Inc., St Paul, MN, USA
| | - Michael C. Borys
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Zheng Jian Li
- Biologics Development, Global Manufacturing and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
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43
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Fernandes JP, Neto R, Centeno F, De Fátima Teixeira M, Gomes AC. Unveiling the potential of novel yeast protein extracts in white wines clarification and stabilization. Front Chem 2015; 3:20. [PMID: 25853122 PMCID: PMC4364169 DOI: 10.3389/fchem.2015.00020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 03/02/2015] [Indexed: 11/21/2022] Open
Abstract
Fining agents derived from animal and mineral sources are widely used to clarify and stabilize white wines. Nevertheless, health and environmental problems are being raised, concerning the allergenic and environmental impact of some of those fining products. In this study, our aim is to validate the potential of yeast protein extracts, obtained from an alternative and safe source, naturally present in wine: oenological yeasts. Three untreated white wines were used in this work in order to evaluate the impact of these novel yeast protein extracts (YPE) in terms of the wine clarification and stabilization improvement. Two separated fining trials were thus conducted at laboratory scale and the yeast alternatives were compared with reference fining agents, obtained from mineral, animal and vegetable origins. Our results indicate that YPE were capable to promote (i) brilliance/color improvement, (ii) turbidity reduction (76–89% comparing with the untreated wines), and (iii) production of compact and homogeneous lees (44% smaller volume than obtained with bentonite). Additionally, after submitting wines to natural and forced oxidations, YPE treatments revealed (iv) different forms of colloidal stabilization, by presenting comparable or superior effects when particularly compared to casein. Altogether, this study reveals that YPE represent a promising alternative for white wine fining, since they are resultant from a natural and more sustainable origin, at present not regarded as potential allergenic according to Regulation (EC) No. 1169/2011.
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Affiliation(s)
| | | | - Filipe Centeno
- PROENOL - Indústria Biotecnológica, Lda. Canelas, Portugal
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44
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Noyes A, Huffman B, Berrill A, Merchant N, Godavarti R, Titchener-Hooker N, Coffman J, Sunasara K, Mukhopadhyay T. High throughput screening of particle conditioning operations: II. Evaluation of scale-up heuristics with prokaryotically expressed polysaccharide vaccines. Biotechnol Bioeng 2015; 112:1568-82. [PMID: 25727194 DOI: 10.1002/bit.25580] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 02/15/2015] [Accepted: 02/17/2015] [Indexed: 11/08/2022]
Abstract
Multivalent polysaccharide conjugate vaccines are typically comprised of several different polysaccharides produced with distinct and complex production processes. Particle conditioning steps, such as precipitation and flocculation, may be used to aid the recovery and purification of such microbial vaccine products. An ultra scale-down approach to purify vaccine polysaccharides at the micro-scale would greatly enhance productivity, robustness, and speed the development of novel conjugate vaccines. In part one of this series, we described a modular and high throughput approach to develop particle conditioning processes (HTPC) for biologicals that combines flocculation, solids removal, and streamlined analytics. In this second part of the series, we applied HTPC to industrially relevant feedstreams comprised of capsular polysaccharides (CPS) from several bacterial species. The scalability of HTPC was evaluated between 0.8 mL and 13 L scales, with several different scaling methodologies examined. Clarification, polysaccharide yield, impurity clearance, and product quality achieved with HTPC were reproducible and comparable with larger scales. Particle sizing was the response with greatest sensitivity to differences in processing scale and enabled the identification of useful scaling rules. Scaling with constant impeller tip speed or power per volume in the impeller swept zone offered the most accurate scale up, with evidence that time integration of these values provided the optimal basis for scaling. The capability to develop a process at the micro-scale combined with evidence-based scaling metrics provide a significant advance for purification process development of vaccine processes. The USD system offers similar opportunities for HTPC of proteins and other complex biological molecules.
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Affiliation(s)
- Aaron Noyes
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Bernard Katz Building, Gordon Street, London, WC1E 7JE, UK.,Pfizer Bioprocess R&D, Andover, Massachusetts
| | - Ben Huffman
- Pfizer Bioprocess R&D, Chesterfield, Missouri
| | | | | | | | - Nigel Titchener-Hooker
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Bernard Katz Building, Gordon Street, London, WC1E 7JE, UK
| | | | | | - Tarit Mukhopadhyay
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Bernard Katz Building, Gordon Street, London, WC1E 7JE, UK.
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45
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Noyes A, Huffman B, Godavarti R, Titchener-Hooker N, Coffman J, Sunasara K, Mukhopadhyay T. High throughput screening of particle conditioning operations: I. System design and method development. Biotechnol Bioeng 2015; 112:1554-67. [PMID: 25728932 DOI: 10.1002/bit.25575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 02/15/2015] [Accepted: 02/17/2015] [Indexed: 11/06/2022]
Abstract
The biotech industry is under increasing pressure to decrease both time to market and development costs. Simultaneously, regulators are expecting increased process understanding. High throughput process development (HTPD) employs small volumes, parallel processing, and high throughput analytics to reduce development costs and speed the development of novel therapeutics. As such, HTPD is increasingly viewed as integral to improving developmental productivity and deepening process understanding. Particle conditioning steps such as precipitation and flocculation may be used to aid the recovery and purification of biological products. In this first part of two articles, we describe an ultra scale-down system (USD) for high throughput particle conditioning (HTPC) composed of off-the-shelf components. The apparatus is comprised of a temperature-controlled microplate with magnetically driven stirrers and integrated with a Tecan liquid handling robot. With this system, 96 individual reaction conditions can be evaluated in parallel, including downstream centrifugal clarification. A comprehensive suite of high throughput analytics enables measurement of product titer, product quality, impurity clearance, clarification efficiency, and particle characterization. HTPC at the 1 mL scale was evaluated with fermentation broth containing a vaccine polysaccharide. The response profile was compared with the Pilot-scale performance of a non-geometrically similar, 3 L reactor. An engineering characterization of the reactors and scale-up context examines theoretical considerations for comparing this USD system with larger scale stirred reactors. In the second paper, we will explore application of this system to industrially relevant vaccines and test different scale-up heuristics.
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Affiliation(s)
- Aaron Noyes
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Bernard Katz Building, Gordon Street, London, WC1E 7JE, UK.,Pfizer Bioprocess R&D, Andover, Massachusetts
| | - Ben Huffman
- Pfizer Bioprocess R&D, Chesterfield, Missouri
| | | | - Nigel Titchener-Hooker
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Bernard Katz Building, Gordon Street, London, WC1E 7JE, UK
| | | | | | - Tarit Mukhopadhyay
- The Advanced Centre for Biochemical Engineering, Department of Biochemical Engineering, University College London, Bernard Katz Building, Gordon Street, London, WC1E 7JE, UK.
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46
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Thai CCD, Moghaddam L, Doherty WOS. Calcium phosphate flocs and the clarification of sugar cane juice from whole of crop harvesting. J Agric Food Chem 2015; 63:1573-1581. [PMID: 25574835 DOI: 10.1021/jf502229f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Sugar cane biomass is one of the most viable feedstocks for the production of renewable fuels and chemicals. Therefore, processing the whole of crop (WC) (i.e., stalk and trash, instead of stalk only) will increase the amount of available biomass for this purpose. However, effective clarification of juice expressed from WC for raw sugar manufacture is a major challenge because of the amounts and types of non-sucrose impurities (e.g., polysaccharides, inorganics, proteins, etc.) present. Calcium phosphate flocs are important during sugar cane juice clarification because they are responsible for the removal of impurities. Therefore, to gain a better understanding of the role of calcium phosphate flocs during the juice clarification process, the effects of impurities on the physicochemical properties of calcium phosphate flocs were examined using small-angle laser light scattering technique, attenuated total reflectance Fourier transformed infrared spectroscopy, and X-ray powder diffraction. Results on synthetic sugar juice solutions showed that the presence of SiO2 and Na(+) ions affected floc size and floc structure. Starch and phosphate ions did not affect the floc structure; however, the former reduced the floc size, whereas the latter increased the floc size. The study revealed that high levels of Na(+) ions would negatively affect the clarification process the most, as they would reduce the amount of suspended particles trapped by the flocs. A complementary study on prepared WC juice using cold and cold/intermediate liming techniques was conducted. The study demonstrated that, in comparison to the one-stage (i.e., conventional) clarification process, a two-stage clarification process using cold liming removed more polysaccharides (≤19%), proteins (≤82%), phosphorus (≤53%), and SiO2 (≤23%) in WC juice but increased Ca(2+) (≤136%) and sulfur (≤200%).
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Affiliation(s)
- Caroline C D Thai
- Centre for Tropical Crops and Biocommodities, Queensland University of Technology , Brisbane, QLD 4000, Australia
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47
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Abstract
Effects of acidity on cloud stability in pasteurized carrot juice were examined over the pH range of 3.5-6.2. Cloud sedimentation, particle diameter, and ζ potential were measured at each pH condition to quantify juice cloud stability and clarification during 3 days of storage. Acidification below pH 4.9 resulted in a less negative ζ potential, an increased particle size, and an unstable cloud, leading to juice clarification. As the acidity increased, clarification occurred more rapidly and to a greater extent. Only a weak effect of ionic strength was observed when sodium salts were added to the juice, but the addition of calcium salts significantly reduced the cloud stability.
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Affiliation(s)
- Alison K Schultz
- Department of Food Science and Technology, and §Department of Chemical Engineering and Materials Science, University of California, Davis , Davis, California 95616, United States
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48
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Dixit S, Upadhyay SK, Singh H, Pandey B, Chandrashekar K, Verma PC. Pectin methylesterase of Datura species, purification, and characterization from Datura stramonium and its application. Plant Signal Behav 2013; 8:doi: 10.4161/psb.25681. [PMID: 23887498 PMCID: PMC4091111 DOI: 10.4161/psb.25681] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 07/08/2013] [Accepted: 07/09/2013] [Indexed: 05/29/2023]
Abstract
Pectin methylesterases (PME; EC 3.1.1.11) involved in de-esterification of pectin and have applicability in food, textiles, wines, pulp, and paper industries. In the present study, we compared PME activity of different parts of 3 Datura species and found that fruit coat showed maximum PME activity followed by leaf and seed. PME from leaves of D. stramonium (DsPME) was purified and characterized. DsPME showed optimum activity at 60 °C and pH 9 in the presence of 0.3 M NaCl. DsPME was stable at 70 °C and retained more than 40% activity after 60 min of incubation. However, enzyme activity completely abolished at 80 after 5 min of incubation. It follows Michaelis-Menten enzyme kinetics. Km and Vmax with citrus pectin were 0.008 mg/ml and 16.96 µmol/min, respectively. DsPME in combination with polygalactourenase (PGA) increased the clarity of orange, apple, pomegranate and pineapple juices by 2.9, 2.6, 2.3, and 3.6 fold, respectively in comparison to PGA alone. Due to very high de-esterification activity, easy denaturation and significant efficacy in incrementing clarification of fruit juice makes DsPME useful for industrial application.
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Affiliation(s)
- Sameer Dixit
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP India
| | - Santosh Kumar Upadhyay
- Department of Biotechnology; National Agri - Food Biotechnology Institute; Ministry of Science and Technology; Mohali, Punjab, India
| | - Harpal Singh
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP India
| | - Bindu Pandey
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP India
| | - Krishnappa Chandrashekar
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP India
| | - Praveen Chandra Verma
- CSIR-National Botanical Research Institute; Council of Scientific and Industrial Research; Rana Pratap Marg; Lucknow, UP India
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49
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Steinberg PI. Two techniques of supportive psychotherapy. Can Fam Physician 1989; 35:1139-1143. [PMID: 21248948 PMCID: PMC2280366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This paper describes two techniques of supportive psychotherapy - clarification and confrontation - which can be used by family physicians. Case examples are offered to illustrate the application of these techniques. The author discusses what supportive psychotherapy is, and what it is not.
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