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Yao JW, Huang XY, Lin YH, Liu CG, Bai FW. Online monitoring lignocellulosic particles by focus beam reflectance measurement for efficient bioprocessing. BIORESOURCE TECHNOLOGY 2024; 406:131053. [PMID: 38944318 DOI: 10.1016/j.biortech.2024.131053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/26/2024] [Accepted: 06/26/2024] [Indexed: 07/01/2024]
Abstract
Lignocellulose presents a promising alternative to fossil fuels. Monitoring the mass and size changes of lignocellulosic particles without disrupting the process can assist in adjusting pretreatment and enzymatic hydrolysis, where conventional sieving methods fall short. A method utilizing focused beam reflectance measurement (FBRM) was developed to establish mathematical correlations between FBRM chord information (chord length and count) and particle characteristics (weight and size) quantified through sieving. Results indicate particle size exhibits a linear correlation with the square weighted median chord length (Lsqr) with R2 at 0.93. Further, real-time bulk particle mass can be predicted using Lsqr and chord count (R2 0.98). These correlations are applicable in range 53 μm to 358.5 μm. Real-time monitoring of enzymatic hydrolysis of corn stalks has demonstrated the practical applicability of FBRM. This study introduces a novel approach for online characterization of lignocellulosic particles, thereby enhancing lignocellulosic biorefineries.
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Affiliation(s)
- Ji-Wen Yao
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiao-Yan Huang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yen-Han Lin
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, S7N 5A9, Canada
| | - Chen-Guang Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Feng-Wu Bai
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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Belpaire TER, Pešek J, Lories B, Verstrepen KJ, Steenackers HP, Ramon H, Smeets B. Permissive aggregative group formation favors coexistence between cooperators and defectors in yeast. THE ISME JOURNAL 2022; 16:2305-2312. [PMID: 35778439 PMCID: PMC9477849 DOI: 10.1038/s41396-022-01275-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 06/08/2022] [Accepted: 06/16/2022] [Indexed: 06/01/2023]
Abstract
In Saccharomyces cerevisiae, the FLO1 gene encodes flocculins that lead to formation of multicellular flocs, that offer protection to the constituent cells. Flo1p was found to preferentially bind to fellow cooperators compared to defectors lacking FLO1 expression, enriching cooperators within the flocs. Given this dual function in cooperation and kin recognition, FLO1 has been termed a "green beard gene". Because of the heterophilic nature of the Flo1p bond however, we hypothesize that kin recognition is permissive and depends on the relative stability of the FLO1+/flo1- versus FLO1+/FLO1+ detachment force F. We combine single-cell measurements of adhesion, individual cell-based simulations of cluster formation, and in vitro flocculation to study the impact of relative bond stability on the evolutionary stability of cooperation. We identify a trade-off between both aspects of the green beard mechanism, with reduced relative bond stability leading to increased kin recognition at the expense of cooperative benefits. We show that the fitness of FLO1 cooperators decreases as their frequency in the population increases, arising from the observed permissive character (F+- = 0.5 F++) of the Flo1p bond. Considering the costs associated with FLO1 expression, this asymmetric selection often results in a stable coexistence between cooperators and defectors.
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Affiliation(s)
- Tom E R Belpaire
- Division of Mechatronics, Biostatistics, and Sensors, KU Leuven, 3001, Leuven, Belgium.
- Centre for Microbial and Plant Genetics, KU Leuven, 3001, Leuven, Belgium.
| | - Jiří Pešek
- Team SIMBIOTX, Inria Saclay, 91120, Palaiseau, France
| | - Bram Lories
- Centre for Microbial and Plant Genetics, KU Leuven, 3001, Leuven, Belgium
| | - Kevin J Verstrepen
- Centre for Microbial and Plant Genetics, KU Leuven, 3001, Leuven, Belgium
- Laboratory of Systems Biology, VIB-KU Leuven Center for Microbiology, 3001, Leuven, Belgium
| | - Hans P Steenackers
- Centre for Microbial and Plant Genetics, KU Leuven, 3001, Leuven, Belgium
| | - Herman Ramon
- Division of Mechatronics, Biostatistics, and Sensors, KU Leuven, 3001, Leuven, Belgium
| | - Bart Smeets
- Division of Mechatronics, Biostatistics, and Sensors, KU Leuven, 3001, Leuven, Belgium
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Mehta DV, Curtis SJ, Rudolph AB, Mary CS, Goodrich R, Schneider KR, MacIntosh AJ. A Mini Review: The History of Yeast Flocculation with an Emphasis on Measurement Techniques. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2020. [DOI: 10.1080/03610470.2020.1806006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Devanshu V. Mehta
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, FL, U.S.A
| | - Savanna J. Curtis
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, FL, U.S.A
| | - Arthur B. Rudolph
- Chemistry Research Unit, Center for Medical, Agricultural, and Veterinary Entomology, Agricultural Research Service, United States Department of Agriculture, Gainesville, FL, U.S.A
| | - Colette St. Mary
- Department of Biology, University of Florida, Gainesville, FL, U.S.A
| | - Renee Goodrich
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, FL, U.S.A
| | - Keith R. Schneider
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, FL, U.S.A
| | - Andrew J. MacIntosh
- Department of Food Science and Human Nutrition, University of Florida, Gainesville, FL, U.S.A
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An X, Kang Y, Li G. The interaction between chitosan and tannic acid calculated based on the density functional theory. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.12.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rahgoshay M, Feiznia S, Arian M, Hashemi SAA. Modeling daily suspended sediment load using improved support vector machine model and genetic algorithm. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:35693-35706. [PMID: 30357665 DOI: 10.1007/s11356-018-3533-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 10/18/2018] [Indexed: 05/14/2023]
Abstract
Prediction of sediment volume and sediment load is always one of the important issues for decision-makers of watershed basins. The present study investigated the daily suspended sediment load in a watershed basin using the improved support vector machine method. Since in most of the previous studies, the coefficients of the support vector machine method had been calculated based on trial and error, in the present study, the combination of the support vector machine and the genetic algorithm is used. In the first step, the unknown parameters of the support vector machine are calculated and then, the sediment load simulation is performed. Two case studies in the present work involve two earth dams in Semnan Province called Veynakeh and Royan. Furthermore, multivariate adaptive regression spline (MARS) and MT tree model (M5T) methods are used for comparison. The results indicated that the input combination of discharge data at the current time and one, two, and three previous days has the best performance for all models. Also, the support vector machine-genetic algorithm (SVM-GA) model has a lower root mean square error (RMSE) and mean absolute error (MAE) compared to the MARS and M5T models for both stations. In addition, comparing observational data with simulation data based on the R2 coefficient suggested that the SVM-GA model offers more accurate results than the other two methods. Accordingly, the SVM-GA method used in this study has a high potential for simulating sediment volume.
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Affiliation(s)
- Mitra Rahgoshay
- Department of Earth Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Sadat Feiznia
- Faculty of Natural Resources, University of Tehran, Karaj, Iran.
| | - Mehran Arian
- Department of Earth Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Seyed Ali Asghar Hashemi
- Department of Watershed Management, Agricultural and Natural Resources Research and Education Center, Semnan, Iran
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