301
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Alizadeh Tabatabai SA, Schippers JC, Kennedy MD. Effect of coagulation on fouling potential and removal of algal organic matter in ultrafiltration pretreatment to seawater reverse osmosis. WATER RESEARCH 2014; 59:283-294. [PMID: 24810744 DOI: 10.1016/j.watres.2014.04.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 02/15/2014] [Accepted: 04/02/2014] [Indexed: 06/03/2023]
Abstract
This paper investigated the effect of coagulation on fouling potential and removal of algal organic matter (AOM) in seawater ultrafiltration (UF) systems. AOM harvested from a strain of bloom forming marine diatom, Chaetoceros affinis, was coagulated with ferric chloride under different coagulation modes and conditions. The effect of coagulation on fouling potential was determined with the Modified Fouling Index-Ultrafiltration (MFI-UF). Removal of AOM was studied for three different modes of coagulation, namely, coagulation followed by sedimentation, coagulation followed by sedimentation and filtration through 0.45 μm, and inline coagulation followed by filtration through 150 kDa UF membranes. Liquid chromatography - organic carbon detection was used to determine the removal of AOM with particular emphasis on biopolymers. AOM (as biopolymers) had a high fouling potential as measured by MFI-UF, which strongly depended on filtration flux. Moreover, the developed cake/gel layer on the membrane was fairly compressible during filtration; manifested as higher fouling potential at higher filtration flux and non-linear development of pressure in filtration tests. Coagulation substantially reduced fouling potential and compressibility of the AOM cake/gel layer. The impact of coagulation was particularly significant at coagulant doses >1 mg Fe/L. Coagulation also substantially reduced the flux-dependency of AOM fouling potential, resulting in linear development of pressure in filtration tests at constant flux. This was attributed to adsorption of biopolymers on precipitated iron hydroxide and formation of Fe-biopolymer aggregates, such that the fouling characteristics of iron hydroxide precipitates prevailed and AOM fouling characteristics diminished. At low coagulant dose, inline coagulation/UF was more effective in removing AOM than the other two coagulation modes tested. At high coagulant dose where sweep floc conditions prevailed, AOM removal was considerably higher and controlled by coagulant dose rather than coagulation mode.
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302
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Pop OL, Brandau T, Schwinn J, Vodnar DC, Socaciu C. The influence of different polymers on viability of Bifidobacterium lactis 300b during encapsulation, freeze-drying and storage. Journal of Food Science and Technology 2014; 52:4146-55. [PMID: 26139879 DOI: 10.1007/s13197-014-1441-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/23/2014] [Accepted: 06/03/2014] [Indexed: 01/09/2023]
Abstract
Seven different types of natural polymers namely hydroxypropyl methylcellulose (HPMC), sodium-carboxymethyl cellulose (Na-CMC), microcrystalline cellulose (MCC), starch BR-07, starch BR-08, dextrin and pullulan were used in order to develop the optimal formula for the entrapment of Bifidobacterium lactis 300B in Ca-alginate based granules. Laminar flow drip casting with Brace-Encapsulator was used in order to prepare the granules. The results showed that alginate/pullulan and alginate/HPMC formulation provide high protection for the bacterial strain used for encapsulation. These two formulations were further used to obtain freeze dried granules, for which the viability in time and at different temperatures was tested. The final results showed a higher viability than the level of the therapeutic minimum (>10(7) CFU/g) after 15 days of storage. Other parameters like entrapment efficiency, production rate, sphericity, flowability were also discussed.
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Affiliation(s)
- Oana Lelia Pop
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5 Manastur str., Cluj-Napoca, 400372 Romania
| | | | - Jens Schwinn
- Brace GmbH, Am Mittelberg 5, Karlstein am Main, D-63791 Germany
| | - Dan Cristian Vodnar
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5 Manastur str., Cluj-Napoca, 400372 Romania
| | - Carmen Socaciu
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5 Manastur str., Cluj-Napoca, 400372 Romania
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303
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Preparation of maltotriose from fermentation broth by hydrolysis of pullulan using pullulanase. Carbohydr Polym 2014; 107:94-7. [DOI: 10.1016/j.carbpol.2014.02.050] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 02/10/2014] [Accepted: 02/15/2014] [Indexed: 11/19/2022]
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304
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Wang D, Ju X, Zhou D, Wei G. Efficient production of pullulan using rice hull hydrolysate by adaptive laboratory evolution of Aureobasidium pullulans. BIORESOURCE TECHNOLOGY 2014; 164:12-9. [PMID: 24835913 DOI: 10.1016/j.biortech.2014.04.036] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 04/09/2014] [Accepted: 04/10/2014] [Indexed: 05/09/2023]
Abstract
Pullulan production by Aureobasidium pullulans CCTCC M 2012259 using rice hull hydrolysate as the carbon source was conducted. The acetic acid in the hydrolysate was demonstrated to exert a negative effect on pullulan biosynthesis. Instead of employing expensive methods to remove acetic acid from the hydrolysate, a mutant A. pullulans ARH-1 was isolated following 20 cycles of adaptive laboratory evolution of the parental strain on medium containing acetic acid. The maximum pullulan production achieved by the adapted mutant at 48 h using the hydrolysate of untreated rice hull was 22.2 g L(-1), while that obtained by the parental strain at 60 h was 15.6 g L(-1). The assay of key enzymes associated with pullulan biosynthesis revealed that acetic acid inhibited enzyme activity rather than suppressing enzyme synthesis. These results demonstrated that adaptive evolution highly improved the efficiency of pullulan production by A. pullulans using the hydrolysate of untreated rice hull.
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Affiliation(s)
- Dahui Wang
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Xiaomin Ju
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Donghai Zhou
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China
| | - Gongyuan Wei
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou 215123, PR China; State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, PR China.
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305
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Kong L, Ziegler GR. Rheological aspects in fabricating pullulan fibers by electro-wet-spinning. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.12.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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306
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Sugumaran K, Shobana P, Mohan Balaji P, Ponnusami V, Gowdhaman D. Statistical optimization of pullulan production from Asian palm kernel and evaluation of its properties. Int J Biol Macromol 2014; 66:229-35. [DOI: 10.1016/j.ijbiomac.2014.02.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 02/19/2014] [Indexed: 10/25/2022]
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307
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Drying process of pullulan edible films forming solutions studied by ATR-FTIR with two-dimensional correlation spectroscopy. Food Chem 2014; 150:267-73. [DOI: 10.1016/j.foodchem.2013.10.122] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 09/29/2013] [Accepted: 10/22/2013] [Indexed: 11/17/2022]
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308
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de Arce Velasquez A, Ferreira LM, Stangarlin MFL, da Silva CDB, Rolim CMB, Cruz L. Novel Pullulan–Eudragit® S100 blend microparticles for oral delivery of risedronate: Formulation, in vitro evaluation and tableting of blend microparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 38:212-7. [DOI: 10.1016/j.msec.2014.02.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 01/24/2014] [Accepted: 02/04/2014] [Indexed: 01/23/2023]
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309
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Jahanshahi-Anbuhi S, Pennings K, Leung V, Liu M, Carrasquilla C, Kannan B, Li Y, Pelton R, Brennan JD, Filipe CDM. Pullulan Encapsulation of Labile Biomolecules to Give Stable Bioassay Tablets. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403222] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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310
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Jahanshahi-Anbuhi S, Pennings K, Leung V, Liu M, Carrasquilla C, Kannan B, Li Y, Pelton R, Brennan JD, Filipe CDM. Pullulan Encapsulation of Labile Biomolecules to Give Stable Bioassay Tablets. Angew Chem Int Ed Engl 2014; 53:6155-8. [PMID: 24764260 DOI: 10.1002/anie.201403222] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Sana Jahanshahi-Anbuhi
- Departments of Chemical Engineering, Chemistry & Chemical Biology, and Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4M1 (Canada)
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311
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Giavasis I. Bioactive fungal polysaccharides as potential functional ingredients in food and nutraceuticals. Curr Opin Biotechnol 2014; 26:162-73. [DOI: 10.1016/j.copbio.2014.01.010] [Citation(s) in RCA: 192] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 01/17/2014] [Accepted: 01/17/2014] [Indexed: 12/12/2022]
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312
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Shen S, Li H, Yang W. The preliminary evaluation on cholesterol-modified pullulan as a drug nanocarrier. Drug Deliv 2014; 21:501-8. [DOI: 10.3109/10717544.2014.895068] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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313
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Morsy MK, Khalaf HH, Sharoba AM, El-Tanahi HH, Cutter CN. Incorporation of essential oils and nanoparticles in pullulan films to control foodborne pathogens on meat and poultry products. J Food Sci 2014; 79:M675-84. [PMID: 24621108 DOI: 10.1111/1750-3841.12400] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 01/19/2014] [Indexed: 11/29/2022]
Abstract
The incorporation of essential oils and nanotechnology into edible films has the potential to improve the microbiological safety of foods. The aim of this study was to evaluate the effectiveness of pullulan films containing essential oils and nanoparticles against 4 foodborne pathogens. Initial experiments using plate overlay assays demonstrated that 2% oregano essential oil was active against Staphylococcus aureus and Salmonella Typhimurium, whereas Listeria monocytogenes and Escherichia coli O157:H7 were not inhibited. Two percent rosemary essential oil was active against S. aureus, L. monocytogenes, E. coli O157:H7, and S. Typhimurium, when compared with 1%. Zinc oxide nanoparticles at 110 nm were active against S. aureus, L. monocytogenes, E. coli O157:H7, and S. Typhimurium, when compared with 100 or 130 nm. Conversely, 100 nm silver (Ag) nanoparticles were more active against S. aureus than L. monocytogenes. Using the results from these experiments, the compounds exhibiting the greatest activity were incorporated into pullulan films and found to inhibit all or some of the 4 pathogens in plate overlay assays. In challenge studies, pullulan films containing the compounds effectively inhibited the pathogens associated with vacuum packaged meat and poultry products stored at 4 °C for up to 3 wk, as compared to control films. Additionally, the structure and cross-section of the films were evaluated using electron microscopy. The results from this study demonstrate that edible films made from pullulan and incorporated with essential oils or nanoparticles may improve the safety of refrigerated, fresh or further processed meat and poultry products.
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Affiliation(s)
- Mohamed K Morsy
- Dept. of Food Science, Faculty of Agriculture, Benha Univ, Qaluobia, Egypt
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314
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Gniewosz M, Synowiec A, Kraśniewska K, Przybył JL, Bączek K, Węglarz Z. The antimicrobial activity of pullulan film incorporated with meadowsweet flower extracts (Filipendulae ulmariae flos) on postharvest quality of apples. Food Control 2014. [DOI: 10.1016/j.foodcont.2013.09.049] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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315
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Fernandes SC, Sadocco P, Causio J, Silvestre AJ, Mondragon I, Freire CS. Antimicrobial pullulan derivative prepared by grafting with 3-aminopropyltrimethoxysilane: Characterization and ability to form transparent films. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.05.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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316
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Zhu G, Sheng L, Tong Q. Preparation and characterization of carboxymethyl-gellan and pullulan blend films. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.06.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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317
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Farris S, Unalan IU, Introzzi L, Fuentes-Alventosa JM, Cozzolino CA. Pullulan-based films and coatings for food packaging: Present applications, emerging opportunities, and future challenges. J Appl Polym Sci 2014. [DOI: 10.1002/app.40539] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Stefano Farris
- Department of Food Environmental and Nutritional Sciences (DeFENS); Packaging Division; University of Milan; Via Celoria 2 Milan I- 20133 Italy
| | - Ilke Uysal Unalan
- Department of Food Environmental and Nutritional Sciences (DeFENS); Packaging Division; University of Milan; Via Celoria 2 Milan I- 20133 Italy
| | - Laura Introzzi
- Department of Food Environmental and Nutritional Sciences (DeFENS); Packaging Division; University of Milan; Via Celoria 2 Milan I- 20133 Italy
| | - José Maria Fuentes-Alventosa
- Centro de Investigación y Formación Agraria “Alameda del Obispo,” Instituto de Investigación y Formación Agraria y Pesquera (IFAPA); Avda. Menéndez Pidal s/n Córdoba 14004 Spain
| | - Carlo A. Cozzolino
- Department of Food Environmental and Nutritional Sciences (DeFENS); Packaging Division; University of Milan; Via Celoria 2 Milan I- 20133 Italy
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318
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Synytsya A, Novak M. Structural analysis of glucans. ANNALS OF TRANSLATIONAL MEDICINE 2014; 2:17. [PMID: 25332993 PMCID: PMC4202478 DOI: 10.3978/j.issn.2305-5839.2014.02.07] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 02/14/2014] [Indexed: 11/14/2022]
Abstract
Glucans are most widespread polysaccharides in the nature. There is a large diversity in their molecular weight and configuration depending on the original source. According to the anomeric structure of glucose units it is possible to distinguish linear and branched α-, β- as well as mixed α,β-glucans with various glycoside bond positions and molecular masses. Isolation of glucans from raw sources needs removal of ballast compounds including proteins, lipids, polyphenols and other polysaccharides. Purity control of glucan fractions is necessary to evaluate the isolation and purification steps; more rigorous structural analyses of purified polysaccharides are required to clarify their structure. A set of spectroscopic, chemical and separation methods are used for this purpose. Among them, NMR spectroscopy is known as a powerful tool in structural analysis of glucans both in solution and in solid state. Along with chemolytic methods [methylation analysis (MA), periodate oxidation, partial chemical or enzymatic hydrolysis, etc.], correlation NMR experiments are able to determine the exact structure of tested polysaccharides. Vibration spectroscopic methods (FTIR, Raman) are sensitive to anomeric structure of glucans and can be used for purity control as well. Molecular weight distribution, homogeneity and branching of glucans can be estimated by size-exclusion chromatography (SEC), laser light scattering (LLS) and viscometry.
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Affiliation(s)
- Andriy Synytsya
- Department of Carbohydrates and Cereals, Institute of Chemical Technology, Prague, Czech Republic
| | - Miroslav Novak
- Department of Carbohydrates and Cereals, Institute of Chemical Technology, Prague, Czech Republic
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319
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Ponnusami V, Gunasekar V. Production of Pullulan by Microbial Fermentation. POLYSACCHARIDES 2014. [DOI: 10.1007/978-3-319-03751-6_58-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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320
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Microbial of Extracellular Polysaccharide Production from Biomass Sources. POLYSACCHARIDES 2014. [DOI: 10.1007/978-3-319-03751-6_51-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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321
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Bioconversion of industrial solid waste—Cassava bagasse for pullulan production in solid state fermentation. Carbohydr Polym 2014; 99:22-30. [DOI: 10.1016/j.carbpol.2013.08.039] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 08/16/2013] [Accepted: 08/16/2013] [Indexed: 11/20/2022]
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322
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Xiao Q, Tong Q. Thermodynamic properties of moisture sorption in pullulan–sodium alginate based edible films. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.09.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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323
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Development and characterization of novel probiotic-residing pullulan/starch edible films. Food Chem 2013; 141:1041-9. [DOI: 10.1016/j.foodchem.2013.03.103] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/27/2013] [Accepted: 03/28/2013] [Indexed: 10/27/2022]
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324
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Freitas F, Alves VD, Reis MA, Crespo JG, Coelhoso IM. Microbial polysaccharide-based membranes: Current and future applications. J Appl Polym Sci 2013. [DOI: 10.1002/app.40047] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Filomena Freitas
- Chemistry Department; REQUIMTE/CQFB, FCT/Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - Vítor D. Alves
- CEER-Biosystems Engineering; ISA/University of Lisbon; Tapada da Ajuda 1349-017 Lisboa Portugal
| | - Maria A. Reis
- Chemistry Department; REQUIMTE/CQFB, FCT/Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - João G. Crespo
- Chemistry Department; REQUIMTE/CQFB, FCT/Universidade Nova de Lisboa; 2829-516 Caparica Portugal
| | - Isabel M. Coelhoso
- Chemistry Department; REQUIMTE/CQFB, FCT/Universidade Nova de Lisboa; 2829-516 Caparica Portugal
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325
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Gualandi C, Zucchelli A, Fernández Osorio M, Belcari J, Focarete ML. Nanovascularization of polymer matrix: generation of nanochannels and nanotubes by sacrificial electrospun fibers. NANO LETTERS 2013; 13:5385-5390. [PMID: 24144429 DOI: 10.1021/nl402930x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Several methods for creating vascular structures, made of either discrete or interconnected channels have been developed. The currently employed methods enable the formation of channels with diameters in the millimetric and micrometric scale. However, the formation of an interconnected three-dimensional (3D) vasculature by using a rapid and scalable process is a challenge and largely limits the fields of applicability of these innovative materials. Here, we propose the use of electrospun nonwoven mats as sacrificial fibers to easily generate 3D macroscale vascularized composites containing interconnected networks with channels and tubes having submicrometric and nanometric diameters. The novel approach has the potentialities to give rise to a novel generation of composites potentially displaying new and enhanced functionalities thanks to the nanoscale features of the cavities.
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Affiliation(s)
- Chiara Gualandi
- Advanced Mechanics and Materials - Interdepartmental Center for Industrial Research, (AMM ICIR) and ‡Department of Industrial Engineering (DIN), University of Bologna , viale Risorgimento 2, 40136, Bologna, Italy
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326
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Choudhury AR, Bhattacharjee P, Prasad GS. Development of suitable solvent system for downstream processing of biopolymer pullulan using response surface methodology. PLoS One 2013; 8:e77071. [PMID: 24143200 PMCID: PMC3797140 DOI: 10.1371/journal.pone.0077071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Accepted: 09/06/2013] [Indexed: 11/29/2022] Open
Abstract
Downstream processing is an important aspect of all biotechnological processes and has significant implications on quality and yield of the final product. Several solvents were examined for their efficacy on pullulan precipitation from fermentation broth. Interactions among four selected solvents and their effect on pullulan yield were studied using response surface methodology. A polynomial model was developed using D-optimal design and three contour plots were generated by performing 20 different experiments and the model was validated by performing optimization experiments. The results indicated that lower concentration of ethanol in combination with the other three solvents has resulted in higher yield of polymer from fermentation broth and the optimized solvent system was able to recover 1.44 times more pullulan as compared to the conventional ethanolic precipitation method. These observations may help in enhancing efficiency of pullulan recovery from fermentation broth and also result in reduced cost of production for the final product.
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Affiliation(s)
- Anirban Roy Choudhury
- CSIR-Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
| | - Paramita Bhattacharjee
- Department of Food Technology & Bio-Chemical Engineering, Jadavpur University, Kolkata, India
| | - Gandham S. Prasad
- CSIR-Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Chandigarh, India
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327
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Controlled Production of Exopolysaccharides from Enterobacter A47 as a Function of Carbon Source with Demonstration of Their Film and Emulsifying Abilities. Appl Biochem Biotechnol 2013; 172:641-57. [DOI: 10.1007/s12010-013-0560-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 09/27/2013] [Indexed: 11/26/2022]
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328
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Yu XH, Gu ZX. Direct production of feruloyl oligosaccharides and hemicellulase inducement and distribution in a newly isolated Aureobasidium pullulans strain. World J Microbiol Biotechnol 2013; 30:747-55. [PMID: 24078110 DOI: 10.1007/s11274-013-1503-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 09/20/2013] [Indexed: 10/26/2022]
Abstract
Studies were carried out to screen and identify strains that are able to directly produce ferulic oligosaccharides (FOs) from wheat bran (WB). The inducement and distribution of hemicellulases from strain 2012, which was identified as a non-melanin secreting strain of Aureobasidium pullulans (A. pullulans), were also determined. In a 60 g/L WB solution, A. pullulans could produce 545 nmol/L FOs, 64.12 IU/mL xylanase and 0.14 IU/mL ferulic acid esterase (FAE). A. pullulans was cultivated in media with WB, glucose, xylose, sucrose, lactose or xylan as the carbon source, and hemicellulases were mainly induced by xylan and WB and inhibited by glucose and sucrose. Xylanase and FAE were mainly present in the culture filtrate, xylosidase in the hyphal filaments and arabinofuranosidase was a membrane-bound enzyme. The yield of FOs was positively correlated to the hemicellulases activity, and significantly positively (P < 0.05) correlated to the xylanase activity (r = 0.992).
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329
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Statistical studies on high molecular weight pullulan production in solid state fermentation using jack fruit seed. Carbohydr Polym 2013; 98:854-60. [DOI: 10.1016/j.carbpol.2013.06.071] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 06/20/2013] [Accepted: 06/28/2013] [Indexed: 11/18/2022]
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330
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Freitas F, Alves V, Coelhoso I, Reis M. Production and Food Applications of Microbial Biopolymers. CONTEMPORARY FOOD ENGINEERING 2013. [DOI: 10.1201/b15426-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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331
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Vijayendra SVN, Shamala TR. Film forming microbial biopolymers for commercial applications—A review. Crit Rev Biotechnol 2013; 34:338-57. [DOI: 10.3109/07388551.2013.798254] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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332
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333
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Zhu G, Sheng L, Li J, Tong Q. Preparation and characterisation of gellan/pullulan composite blend films. Int J Food Sci Technol 2013. [DOI: 10.1111/ijfs.12235] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guilan Zhu
- School of Food Science and Technology; Jiangnan University; Wuxi 214122 China
- Department of Life Science; Hefei Normal University; Hefei 230061 China
| | - Long Sheng
- School of Food Science and Technology; Jiangnan University; Wuxi 214122 China
| | - Juan Li
- School of Food Science and Technology; Jiangnan University; Wuxi 214122 China
- State Key Laboratory of Food Science and Technology; Jiangnan University; Jiangsu Wuxi Wuxi 214122 China
| | - Qunyi Tong
- School of Food Science and Technology; Jiangnan University; Wuxi 214122 China
- State Key Laboratory of Food Science and Technology; Jiangnan University; Jiangsu Wuxi Wuxi 214122 China
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334
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Pullulan production and physiological characteristics of Aureobasidium pullulans under acid stress. Appl Microbiol Biotechnol 2013; 97:8069-77. [DOI: 10.1007/s00253-013-5094-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 06/30/2013] [Accepted: 07/01/2013] [Indexed: 10/26/2022]
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335
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Polyak D, Eldar-Boock A, Baabur-Cohen H, Satchi-Fainaro R. Polymer conjugates for focal and targeted delivery of drugs. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3158] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Dina Polyak
- Department of Physiology and Pharmacology; Sackler School of Medicine, Tel Aviv University; Tel Aviv 69978 Israel
| | - Anat Eldar-Boock
- Department of Physiology and Pharmacology; Sackler School of Medicine, Tel Aviv University; Tel Aviv 69978 Israel
| | - Hemda Baabur-Cohen
- Department of Physiology and Pharmacology; Sackler School of Medicine, Tel Aviv University; Tel Aviv 69978 Israel
| | - Ronit Satchi-Fainaro
- Department of Physiology and Pharmacology; Sackler School of Medicine, Tel Aviv University; Tel Aviv 69978 Israel
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336
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Lipase production by diverse phylogenetic clades of Aureobasidium pullulans. Biotechnol Lett 2013; 35:1701-6. [DOI: 10.1007/s10529-013-1268-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 05/28/2013] [Indexed: 01/24/2023]
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337
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Jiang L, Li X, Liu L, Zhang Q. Cellular uptake mechanism and intracellular fate of hydrophobically modified pullulan nanoparticles. Int J Nanomedicine 2013; 8:1825-34. [PMID: 23674894 PMCID: PMC3652563 DOI: 10.2147/ijn.s44342] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The cellular uptake mechanism and intracellular fate of self-assembled nanoparticles (NPs) of cholesterol-modified pullulan (CHSP) by human hepatocellular carcinoma (HepG2) cells were investigated. Covalent conjugation with fluorescein isothiocyanate (FITC) yielded stably labeled CHSP (FITC-CHSP), which was successfully formulated into NPs (mean particle size 63.0 ± 1.9 nm) by dialysis. A cytotoxicity assay clearly indicated that the CHSP NPs did not show significant toxicity in HepG2 cells. The effects of NP concentration, incubation time, and temperature on the cellular uptake of the NPs were systematically evaluated by fluorometry, and the results suggested that cellular uptake of the NPs was concentration-,time-, and temperature-dependent. In vitro experiments with endocytic inhibitors revealed that clathrin-mediated endocytosis and macropinocytosis were involved in the internalization of CHSP NPs. The intracellular trafficking study demonstrated that CHSP NPs were entrapped in the lysosomes at 1 hour after incubation; colocalization of NPs with either the Golgi apparatus or the endoplasmic reticula was not observed during the entire course of the study. These results suggested that the CHSP NPs may serve as a versatile carrier for intracellular delivery of therapeutic agents.
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Affiliation(s)
- Liqin Jiang
- Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, People's Republic of China
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338
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Sajna KV, Sukumaran RK, Gottumukkala LD, Jayamurthy H, Dhar KS, Pandey A. Studies on structural and physical characteristics of a novel exopolysaccharide from Pseudozyma sp. NII 08165. Int J Biol Macromol 2013; 59:84-9. [PMID: 23597707 DOI: 10.1016/j.ijbiomac.2013.04.025] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 03/09/2013] [Accepted: 04/09/2013] [Indexed: 11/27/2022]
Abstract
The aim of this work was to study the production of exopolysaccharide (EPS) from a novel ustilaginomycetes yeast strain Pseudozyma sp. NII 08165. The culture produced 3.5g/l EPS on fourth day of fermentation in a glucose-based medium. The structural characterization revealed that the EPS was a polymer of glucose, galactose and mannose in the ratio of 2.4:5.0:2.6 with a molecular weight of 1.7MDa. The pseudoplastic behaviour of aqueous EPS with a thermal stability up to 220°C indicated its potential utility as a thickening or gelling agent in food industry. SEM studies of the EPS showed that it had compact film-like structure, which could make it a useful in preparing plasticized films. The AFM studies showed that EPS had spike-shaped microstructure. Physical properties of the exopolysaccharide determined further indicated its possible potential in different industrial applications.
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Affiliation(s)
- Kuttuvan Valappil Sajna
- Biotechnology Division, CSIR - National Institute for Interdisciplinary Science and Technology, Trivandrum 695019, India
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339
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Babu RP, O'Connor K, Seeram R. Current progress on bio-based polymers and their future trends. Prog Biomater 2013; 2:8. [PMID: 29470779 PMCID: PMC5151099 DOI: 10.1186/2194-0517-2-8] [Citation(s) in RCA: 348] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 02/21/2013] [Indexed: 01/19/2023] Open
Abstract
This article reviews the recent trends, developments, and future applications of bio-based polymers produced from renewable resources. Bio-based polymers are attracting increased attention due to environmental concerns and the realization that global petroleum resources are finite. Bio-based polymers not only replace existing polymers in a number of applications but also provide new combinations of properties for new applications. A range of bio-based polymers are presented in this review, focusing on general methods of production, properties, and commercial applications. The review examines the technological and future challenges discussed in bringing these materials to a wide range of applications, together with potential solutions, as well as discusses the major industry players who are bringing these materials to the market.
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Affiliation(s)
- Ramesh P Babu
- Centre for Research Adoptive Nanostructures and Nano Devices, Trinity College, Dublin 2, Ireland
- School of Physics, Trinity College Dublin, Dublin 2, Ireland
| | - Kevin O'Connor
- School of Biomolecular and Biomedical Sciences, Centre for Synthesis and Chemical Biology, UCD Conway Institute, and Earth Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Ramakrishna Seeram
- NUSNNI, National University of Singapore, 2 Engineering Drive 3, Singapore, 117581 Singapore
- Institute of Materials Research and Engineering, Singapore, 117602 Singapore
- Jinan University, Guangzhou, China
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340
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Pinto RJ, Almeida A, Fernandes SC, Freire CS, Silvestre AJ, Neto CP, Trindade T. Antifungal activity of transparent nanocomposite thin films of pullulan and silver against Aspergillus niger. Colloids Surf B Biointerfaces 2013. [DOI: 10.1016/j.colsurfb.2012.09.045] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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341
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Structural characterization of novel extracellular liamocins (mannitol oils) produced by Aureobasidium pullulans strain NRRL 50380. Carbohydr Res 2013; 370:24-32. [PMID: 23435167 DOI: 10.1016/j.carres.2013.01.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/12/2013] [Accepted: 01/21/2013] [Indexed: 11/22/2022]
Abstract
Aureobasidium pullulans is a common, ubiquitous fungus, which is used industrially to produce the polysaccharide pullulan. We have previously shown that A. pullulans produces various heavier-than-water oils, first named here as liamocins, that accumulate in fermentations. Here we report the structural characterization of four liamocins, A1, A2, B1, and B2, produced by A. pullulans strain NRRL 50380 using a combination of MALDI-TOF/MS, quadrupole-TOF/MS, isotopic labeling, NMR, GC/MS, and classical carbohydrate analysis. The data showed that the liamocins are composed of a single mannitol headgroup partially O-acylated with three (for liamocin A1 and A2) or four (for liamocin B1 and B2) 3,5-dihydroxydecanoic ester groups. Liamocins A1 and B1 are non-acetylated, whereas A2 and B2 each contain a single 3'-O-acetyl group. Each of these compounds is characterized by pseudomolecular [M+Na](+) ions in the MALDI-TOF/MS spectra at m/z 763.22, 949.35, 805.22, and 991.37, respectively. The 186Da mass difference between A-type and B-type liamocins corresponds to one O-linked 3,5-dihydroxydecanoate group. HMBC NMR showed that one 3,5-dihydroxydecanoate carbonyl group is ester linked to a primary hydroxyl on the mannitol. Other long range (13)C-(1)H couplings across 1,5-ester bridges showed that the 3,5-dihydroxydecanoate groups form 1-5-linked polyester chains, similar in structure to the antibiotic substance exophilin A. Moreover, the MS analysis identified several non-conjugated poly-3,5-dihydroxydecanoate esters as minor components that are tentatively assigned as exophilins A1, A2, B1, and B2. The liamocins, and three of the exophilins, are new, previously unreported structures.
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342
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Öner ET. Microbial Production of Extracellular Polysaccharides from Biomass. PRETREATMENT TECHNIQUES FOR BIOFUELS AND BIOREFINERIES 2013. [DOI: 10.1007/978-3-642-32735-3_2] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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343
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Synytsya A, Novák M. Structural diversity of fungal glucans. Carbohydr Polym 2013; 92:792-809. [DOI: 10.1016/j.carbpol.2012.09.077] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 09/27/2012] [Accepted: 09/27/2012] [Indexed: 10/27/2022]
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344
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Sugumaran K, Gowthami E, Swathi B, Elakkiya S, Srivastava S, Ravikumar R, Gowdhaman D, Ponnusami V. Production of pullulan by Aureobasidium pullulans from Asian palm kernel: A novel substrate. Carbohydr Polym 2013; 92:697-703. [DOI: 10.1016/j.carbpol.2012.09.062] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 09/14/2012] [Accepted: 09/24/2012] [Indexed: 10/27/2022]
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345
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Tong Q, Xiao Q, Lim LT. Effects of glycerol, sorbitol, xylitol and fructose plasticisers on mechanical and moisture barrier properties of pullulan-alginate-carboxymethylcellulose blend films. Int J Food Sci Technol 2012. [DOI: 10.1111/ijfs.12039] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Qian Xiao
- School of Food Science and Technology; Jiangnan University; Jiangsu Wuxi; 214122; China
| | - Loong-Tak Lim
- Department of Food Science; University of Guelph; Guelph; ON; N1G, 2W1; Canada
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346
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Kreyenschulte D, Krull R, Margaritis A. Recent Advances in Microbial Biopolymer Production and Purification. Crit Rev Biotechnol 2012. [DOI: 10.3109/07388551.2012.743501] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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347
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348
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West TP. Pullulan Production by Aureobasidium pullulans ATCC 201253 Cells Adsorbed onto Cellulose Anion and Cation Exchangers. ISRN MICROBIOLOGY 2012; 2012:140951. [PMID: 23762749 PMCID: PMC3664200 DOI: 10.5402/2012/140951] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 08/30/2012] [Indexed: 11/23/2022]
Abstract
The anion exchanger phosphocellulose and the cation exchanger triethylaminoethyl cellulose were used to immobilize cells of the fungus Aureobasidium pullulans ATCC 201253 and the adsorbed cells were subsequently investigated for their ability to produce the polysaccharide pullulan using batch fermentation. The cells adsorbed on the triethylaminoethyl cellulose at pH 7.5 produced higher pullulan levels than those cells immobilized on phosphocellulose at pH 4.0 for 2 cycles of 168 h at 30 °C. Relative to the initial cycle of 168 h, pullulan production by the cells immobilized on the triethylaminoethyl cellulose decreased slightly after 168 h of the second production cycle while pullulan production by the phosphocellulose-immobilized cells remained about the same after 168 h of the second production cycle.
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Affiliation(s)
- Thomas P. West
- Department of Biology and Microbiology, South Dakota State University, Brookings, SD 57007, USA
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349
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Production of poly(β-l-malic acid) (PMA) from agricultural biomass substrates by Aureobasidium pullulans. Biotechnol Lett 2012; 35:83-9. [DOI: 10.1007/s10529-012-1045-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 08/21/2012] [Indexed: 10/27/2022]
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350
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Pullulan fermentation using a prototype rotational reciprocating plate impeller. Bioprocess Biosyst Eng 2012; 36:603-11. [DOI: 10.1007/s00449-012-0816-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 08/19/2012] [Indexed: 10/27/2022]
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