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Tsermoula P, Rostved Bechshøft M, Friis C, Balling Engelsen S, Khakimov B. Screening of non-protein nitrogen compounds in lactose refining streams from industrial whey permeate processing. Food Chem 2022; 405:134716. [DOI: 10.1016/j.foodchem.2022.134716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/10/2022] [Accepted: 10/20/2022] [Indexed: 11/27/2022]
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2
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Shi T, Guan Y, Chen L, Huang S, Zhu W, Jin C. Application of Near-Infrared Spectroscopy Analysis Technology to Total Nucleosides Quality Control in the Fermented Cordyceps Powder Production Process. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2020; 2020:8850437. [PMID: 33354379 PMCID: PMC7737463 DOI: 10.1155/2020/8850437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 09/27/2020] [Accepted: 11/06/2020] [Indexed: 06/12/2023]
Abstract
Product quality control is a prerequisite for ensuring safety, effectiveness, and stability. However, because of the different strain species and fermentation processes, there was a significant difference in quality. As a result, they should be clearly distinguished in clinical use. Among them, the fermentation process is critical to achieving consistent product quality. This study aims to introduce near-infrared spectroscopy analysis technology into the production process of fermented Cordyceps powder, including strain culture, strain passage, strain fermentation, strain filtration, strain drying, strain pulverizing, and strain mixing. First, high performance liquid chromatography (HPLC) was used to measure the total nucleosides content in the production process of 30 batches of fermented Cordyceps powder, including uracil, uridine, adenine, guanosine, adenosine, and the process stability and interbatch consistency were analyzed with traditional Chinese medicine (TCM) fingerprinting, followed by the near-infrared spectroscopy (NIRS) combined with partial least squares regression (PLSR) to establish a quantitative analysis model of total nucleosides for online process monitoring of fermented Cordyceps powder preparation products. The model parameters indicate that the established model with good robustness and high measurement precision. It further clarifies that the model can be used for online process monitoring of fermented Cordyceps powder preparation products.
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Affiliation(s)
- Tiannv Shi
- Key Laboratory of Modern Chinese Medicine Preparation, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Yongmei Guan
- Key Laboratory of Modern Chinese Medicine Preparation, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Lihua Chen
- Key Laboratory of Modern Chinese Medicine Preparation, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Shiyu Huang
- Key Laboratory of Modern Chinese Medicine Preparation, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Weifeng Zhu
- Key Laboratory of Modern Chinese Medicine Preparation, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Chen Jin
- Key Laboratory of Modern Chinese Medicine Preparation, Ministry of Education, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
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Abstract
Water resources are closely linked to human productivity and life. Owing to the deteriorating water resources environment, accurate and rapid determination of the main water quality parameters has become a current research hotspot. Ultraviolet-visible (UV-Vis) spectroscopy offers an effective tool for qualitative analysis and quantitative detection of contaminants in a water environment. In this review, the principle and application of UV-Vis technology in water quality detection were studied. The principle of UV-Vis spectroscopy for detecting water quality parameters and the method of modeling and analysis of spectral data were presented. Various UV-Vis technologies for water quality detection were reviewed according to the types of pollutants, such as chemical oxygen demand, heavy metal ions, nitrate nitrogen, and dissolved organic carbon. Finally, the future development of UV-Vis spectroscopy for the determination of water quality was discussed.
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Emil Eskildsen C, Næs T. Sample-Specific Prediction Error Measures in Spectroscopy. APPLIED SPECTROSCOPY 2020; 74:791-798. [PMID: 32116011 PMCID: PMC7745614 DOI: 10.1177/0003702820913562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 02/19/2020] [Indexed: 06/10/2023]
Abstract
In applied spectroscopy, the purpose of multivariate calibration is almost exclusively to relate analyte concentrations and spectroscopic measurements. The multivariate calibration model provides estimates of analyte concentrations based on the spectroscopic measurements. Predictive performance is often evaluated based on a mean squared error. While this average measure can be used in model selection, it is not satisfactory for evaluating the uncertainty of individual predictions. For a calibration, the uncertainties are sample specific. This is especially true for multivariate calibration, where interfering compounds may be present. Consider in-line spectroscopic measurements during a chemical reaction, production, etc. Here, reference values are not necessarily available. Hence, one should know the uncertainty of a given prediction in order to use that prediction for telling the state of the chemical reaction, adjusting the process, etc. In this paper, we discuss the influence of variance and bias on sample-specific prediction errors in multivariate calibration. We compare theoretical formulae with results obtained on experimental data. The results point towards the fact that bias contribution cannot necessarily be neglected when assessing sample-specific prediction ability in practice.
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Affiliation(s)
- Carl Emil Eskildsen
- Nofima AS, Norwegian Institute for Food, Fisheries and Aquaculture Research, Ås, Norway
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Tormod Næs
- Nofima AS, Norwegian Institute for Food, Fisheries and Aquaculture Research, Ås, Norway
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Vitzilaiou E, Aunsbjerg SD, Mahyudin NA, Knøchel S. Stress Tolerance of Yeasts Dominating Reverse Osmosis Membranes for Whey Water Treatment. Front Microbiol 2020; 11:816. [PMID: 32431679 PMCID: PMC7214788 DOI: 10.3389/fmicb.2020.00816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 04/06/2020] [Indexed: 11/13/2022] Open
Abstract
Filamentous yeast species belonging to the closely related Saprochaete clavata and Magnusiomyces spicifer were recently found to dominate biofilm communities on the retentate and permeate surface of Reverse Osmosis (RO) membranes used in a whey water treatment system after CIP (Cleaning-In-Place). Microscopy revealed that the two filamentous yeast species can cover extensive areas due to their large cell size and long hyphae formation. Representative strains from these species were here further characterized and displayed similar physiological and biochemical characteristics. Both strains tested were able to grow in twice RO-filtrated permeate water and metabolize the urea present. Little is known about the survival characteristics of these strains. Here, their tolerance toward heat (60, 70, and 80°C) and Ultraviolet light (UV-C) treatment at 255 nm using UV-LED was assessed as well as their ability to form biofilm and withstand cleaning associated stress. According to the heat tolerance experiments, the D60°C of S. clavata and M. spicifer is 16.37 min and 7.24 min, respectively, while a reduction of 3.5 to >4.5 log (CFU/mL) was ensured within 5 min at 70°C. UV-C light at a dose level 10 mJ/cm2 had little effect, while doses of 40 mJ/cm2 and upward ensured a ≥4log reduction in a static laboratory scale set-up. The biofilm forming potential of one filamentous yeast and one budding yeast, Sporopachydermia lactativora, both isolated from the same biofilm, was compared in assays employing flat-bottomed polystyrene microwells and peg lids, respectively. In these systems, employing both nutrient rich as well as nutrient poor media, only the filamentous yeast was able to create biofilm. However, on RO membrane coupons in static systems, both the budding yeast and a filamentous yeast were capable of forming single strain biofilms and when these coupons were exposed to different simulations of CIP treatments both the filamentous and budding yeast survived these. The dominance of these yeasts in some filter systems tested, their capacity to adhere and their tolerance toward relevant stresses as demonstrated here, suggest that these slow growing yeasts are well suited to initiate microbial biofouling on surfaces in low nutrient environments.
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Affiliation(s)
- Eirini Vitzilaiou
- Laboratory of Microbiology and Fermentation, Department of Food Science, University of Copenhagen, Copenhagen, Denmark
| | - Stina D. Aunsbjerg
- Laboratory of Microbiology and Fermentation, Department of Food Science, University of Copenhagen, Copenhagen, Denmark
| | - N. A. Mahyudin
- Department of Food Service and Management, Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
| | - Susanne Knøchel
- Laboratory of Microbiology and Fermentation, Department of Food Science, University of Copenhagen, Copenhagen, Denmark
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Pontius K, Praticò G, Larsen FH, Skov T, Arneborg N, Lantz AE, Bevilacqua M. Fast measurement of phosphates and ammonium in fermentation-like media: A feasibility study. N Biotechnol 2020; 56:54-62. [DOI: 10.1016/j.nbt.2019.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 11/07/2019] [Accepted: 11/18/2019] [Indexed: 11/30/2022]
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Monitoring yeast fermentations by nonlinear infrared technology and chemometrics-understanding process correlations and indirect predictions. Appl Microbiol Biotechnol 2020; 104:5315-5335. [PMID: 32328682 DOI: 10.1007/s00253-020-10604-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/19/2020] [Accepted: 04/01/2020] [Indexed: 10/24/2022]
Abstract
Fermentation processes are still compromised by a lack of monitoring strategies providing integrated process data online, ensuring process understanding, control, and thus, optimal reactor efficiency. The crucial demand for online monitoring strategies, not only encouraged by the PAT initiative but also motivated by modern paradigms such as circular economy and sustainability, has driven research and industry to provide "next-generation process technology": in other words, technology tailored toward industrial needs. Mid-infrared (MIR) spectroscopy as such is superior to near-infrared (NIR) spectroscopy since it provides significantly enhanced selectivity. However, due to high costs and a lack of instrumental robustness, MIR spectroscopy is outcompeted by NIR when it comes to industrial application. The lack of chemometric expertise, model understanding, and practical guidance might add to the slow acceptance of industrial MIR application. This work demonstrates the use of novel MIR, so-called non-linear infrared (NLIR) technology and the importance of model understanding, exemplarily investigated on a lab-scale yeast fermentation process. The six analytes glucose, ethanol, glycerol, acetate, ammonium, and phosphate were modeled by partial least squares (PLS) based on spectral data, demonstrating the potential of the novel technology facilitating online data acquisition and the necessity of investigating indirect predictions. KEY POINTS: • NLIR spectra were acquired online during a yeast fermentation process • PLS models were constructed for six components based on uncorrelated samples • Glucose, ethanol, ammonium, and phosphates were modeled with errors of less than 15% • Acetate and glycerol were shown to rely on indirect predictions.
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Microbiological Constraints for Use of Reclaimed and Reconditioned Water in Food Production and Processing Operations. Food Microbiol 2019. [DOI: 10.1128/9781555819972.ch41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Visual tool for real-time monitoring of membrane fouling via Raman spectroscopy and process model based on principal component analysis. Sci Rep 2018; 8:11057. [PMID: 30038320 PMCID: PMC6056556 DOI: 10.1038/s41598-018-29268-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 07/06/2018] [Indexed: 11/08/2022] Open
Abstract
Membrane fouling, i.e. accumulation of unwanted material on the surface of the membrane is a significant problem in filtration processes since it commonly degrades membrane performance and increases operating costs. Therefore, the advantages of early stage monitoring and control of fouling are widely recognized. In this work, the potential of using Raman spectroscopy coupled to chemometrics in order to quantify degree of membrane fouling in real-time was investigated. The Raman data set collected from adsorption experiments with varying pHs and concentrations of model compound vanillin was used to develop a predictive model based on principal component analysis (PCA) for the quantification of the vanillin adsorbed on the membrane. The correspondence between the predicted concentrations based on the PCA model and actual measured concentrations of adsorbed vanillin was moderately good. The model developed was successful in monitoring both adsorption and desorption processes. Furthermore, the model was able to detect abnormally proceeding experiment based on differentiating PCA score and loading values. The results indicated that the presented approach of using Raman spectroscopy combined with a PCA model has potential for use in monitoring and control of fouling and cleaning in membrane processes.
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Wang Y, Si Y, Huang B, Lou Z. Survey on the theoretical research and engineering applications of multivariate statistics process monitoring algorithms: 2008-2017. CAN J CHEM ENG 2018. [DOI: 10.1002/cjce.23249] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Youqing Wang
- College of Electrical Engineering and Automation; Shandong University of Science and Technology
- College of Information Science and Technology; Beijing University of Chemical Technology
| | - Yabin Si
- College of Information Science and Technology; Beijing University of Chemical Technology
| | - Biao Huang
- Department of Chemical and Materials Engineering; University of Alberta
| | - Zhijiang Lou
- College of Information Science and Technology; Beijing University of Chemical Technology
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Lai X, Li J, Gong X, Lin X, Tang G, Li R, Jia C, Wang D, Ji S. Rapid Simultaneous Determination of Andrographolides in Andrographis paniculata by Near-Infrared Spectroscopy. ANAL LETT 2018. [DOI: 10.1080/00032719.2018.1450416] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xiudi Lai
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Junni Li
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xue Gong
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiaojing Lin
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Gengqiu Tang
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Rong Li
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Canchao Jia
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Dong Wang
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Shengguo Ji
- Department of Pharmaceutical Analysis, School of Traditional Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
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Skou PB, Khakimov B, Hansen TH, Aunsbjerg SD, Knøchel S, Thaysen D, van den Berg F. Chemical characterization by gas chromatography-mass spectrometry and inductively coupled plasma-optical emission spectroscopy of membrane permeates from an industrial dairy ingredient production used as process water. J Dairy Sci 2017; 101:135-146. [PMID: 29055547 DOI: 10.3168/jds.2017-12950] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 08/24/2017] [Indexed: 11/19/2022]
Abstract
Reusing reverse osmosis (RO) membrane permeate instead of potable water in the dairy industry is a very appealing tactic. However, to ensure safe use, the quality of reclaimed water must be guaranteed. To do this, qualitative and quantitative information about which compounds permeate the membranes must be established. In the present study, we provide a detailed characterization of ultrafiltration, RO, and RO polisher (ROP) permeate with regard to organic and inorganic compounds. Results indicate that smaller molecules and elements (such as phosphate, but mainly urea and boron) pass the membrane, and a small set of larger molecules (long-chain fatty acids, glycerol-phosphate, and glutamic acid) are found as well, though in minute concentrations (<0.2 µM). Growth experiments with 2 urease-positive microorganisms, isolated from RO permeate, showed that the nutrient content in the ROP permeate supports limited growth of 1 of the 2 isolates, indicating that the ROP permeate may not be guaranteed to be stable during protracted storage.
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Affiliation(s)
- Peter B Skou
- Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark.
| | - Bekzod Khakimov
- Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Thomas H Hansen
- Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Stina D Aunsbjerg
- Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Susanne Knøchel
- Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
| | - Dorrit Thaysen
- Arla Foods Ingredients, Sønderupvej 26, DK-6920 Videbæk, Denmark
| | - Frans van den Berg
- Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark
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