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Wu Y, Niu J, Yuan X, Liu Y, Zhai S, Zhao Y. Polydopamine and calcium functionalized fiber carrier for enhancing microbial attachment and Cr(VI) resistance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166626. [PMID: 37643709 DOI: 10.1016/j.scitotenv.2023.166626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/25/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
The formation of biofilm determines the performance and stability of biofilm system. Increasing the hydrophilicity of the carrier surface could efficiently accelerate the attachment and growth of microorganisms. Here, the surface of polypropylene (PP) fiber carrier was modified with polydopamine (PDA) and calcium (Ca(II)) to enhance microbial attachment and toxicity resistance. The results of surface characteristic confirmed the self-polymerization of PDA and the chelation mechanism of Ca(II). Subsequently, the biofilm formation experiments were conducted in sequencing batch biofilm reactors using both normal and chromium-containing wastewater. The biofilm on the surface of the modified carrier exhibited better nitrogen removal and Cr(VI) reduction ability. The biomass of the modified carrier was significantly increased, and the maximum microbial attachment amounts in normal wastewater and chrome-containing wastewater were 1153.34 and 511.78 mg/g carrier, respectively. Furthermore, the confocal laser scanning microscope (CLSM) indicated that the modified carrier coated with PDA and Ca(II) were both biocompatible, and the cell activity was significantly increased. 16S rRNA sequencing results showed that the modified carrier efficiently enriched both denitrification bacteria (Thauera and Flavobacterium) and chrome-reducing bacteria (Simplicispira and Arenimonas) to improve system stability and Cr(VI) resistance. Microbial phenotype prediction based on BugBase analysis further verified the enrichment effect of modified carriers on microorganisms responsible for biofilm formation and oxidative stress resistance. Overall, this work proposed a novel functional carrier that could provide references for advancing the application of biofilm systems in wastewater treatment.
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Affiliation(s)
- Yichen Wu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Jiaojiao Niu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Xin Yuan
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yinuo Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Siyuan Zhai
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
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Nan Z, Floquet P, Combes D, Tendero C, Castelain M. Surface Conditioning Effects on Submerged Optical Sensors: A Comparative Study of Fused Silica, Titanium Dioxide, Aluminum Oxide, and Parylene C. SENSORS (BASEL, SWITZERLAND) 2023; 23:9546. [PMID: 38067919 PMCID: PMC10708880 DOI: 10.3390/s23239546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/17/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023]
Abstract
Optical sensors excel in performance but face efficacy challenges when submerged due to potential surface colonization, leading to signal deviation. This necessitates robust solutions for sustained accuracy. Protein and microorganism adsorption on solid surfaces is crucial in antibiofilm studies, contributing to conditioning film and biofilm formation. Most studies focus on surface characteristics (hydrophilicity, roughness, charge, and composition) individually for their adhesion impact. In this work, we tested four materials: silica, titanium dioxide, aluminum oxide, and parylene C. Bovine Serum Albumin (BSA) served as the biofouling conditioning model, assessed with X-ray photoelectron spectroscopy (XPS). Its effect on microorganism adhesion (modeled with functionalized microbeads) was quantified using a shear stress flow chamber. Surface features and adhesion properties were correlated via Principal Component Analysis (PCA). Protein adsorption is influenced by nanoscale roughness, hydrophilicity, and likely correlated with superficial electron distribution and bond nature. Conditioning films alter the surface interaction with microbeads, affecting hydrophilicity and local charge distribution. Silica shows a significant increase in microbead adhesion, while parylene C exhibits a moderate increase, and titanium dioxide shows reduced adhesion. Alumina demonstrates notable stability, with the conditioning film minimally impacting adhesion, which remains low.
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Affiliation(s)
- Zibin Nan
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
| | - Pascal Floquet
- LGC, Université de Toulouse, CNRS, INPT, UPS—ENSIACET 4, allée Émile Monso, 31030 Toulouse, France;
| | - Didier Combes
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
| | - Claire Tendero
- CIRIMAT, Université de Toulouse, CNRS, INPT, UPS—ENSIACET 4, allée Émile Monso, 31030 Toulouse, France;
| | - Mickaël Castelain
- TBI, Université de Toulouse, CNRS UMR5504, INRAe UMR792—INSA 135, avenue de Rangueil, 31055 Toulouse, France
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Shen C, Ma Y, Wu D, Liu P, He Y, Chen K. Preparation of covalent organic framework-based nanofibrous films with temperature-responsive release of thymol for active food packaging. Food Chem 2023; 410:135460. [PMID: 36641909 DOI: 10.1016/j.foodchem.2023.135460] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/11/2022] [Accepted: 01/09/2023] [Indexed: 01/12/2023]
Abstract
Thymol (THY) is commonly used in active food packaging, however because of its high volatility, poor water solubility, and strong aromatic odor, the application of THY is facing challenges. Herein, covalent organic frameworks (COFs) were synthesized in room temperature by asymmetric monomer exchange method for THY encapsulation, and solution blow spinning was used to fabricate the THY@COF/polycaprolactone (PCL) nanofibrous films. The synthesized COFs had a large specific surface area, porous structure, and loading capacity of 30.35% for THY, and THY@COFs possessed good thermal stability. Characterization analysis showed that THY@COFs were successfully incorporated into the PCL films and increased the barrier property of the films. Besides, the films showed good biocompatibility and antibacterial activity. Moreover, THY@COF/PCL films exhibited temperature-responsive THY release profiles, which is important for practical preservation applications, especially for preserving food in warm environments. Overall, THY@COF/PCL films possess promising potential in active food packaging.
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Affiliation(s)
- Chaoyi Shen
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China
| | - Yuting Ma
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering Zhejiang University, Hangzhou 310027, PR China
| | - Di Wu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China; College of Agriculture & Biotechnology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou 310058, PR China; Zhejiang University Zhongyuan Institute, Zhengzhou 450000, PR China.
| | - Pingwei Liu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering Zhejiang University, Hangzhou 310027, PR China
| | - Yong He
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China
| | - Kunsong Chen
- College of Agriculture & Biotechnology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology/The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Hangzhou 310058, PR China
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Shen C, Deng Z, Rao J, Yang Z, Li Y, Wu D, Chen K. Characterization of glycosylated gelatin/pullulan nanofibers fabricated by multi-fluid mixing solution blow spinning. Int J Biol Macromol 2022; 214:512-521. [PMID: 35718154 DOI: 10.1016/j.ijbiomac.2022.06.082] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/31/2022] [Accepted: 06/11/2022] [Indexed: 01/22/2023]
Abstract
In this work, multi-fluid mixing solution blow spinning was applied to develop gelatin/pullulan composite nanofibers, and then the nanofibers were glycated to enhance the physical properties. The results show that the grafting degree of the nanofibers increased significantly from 17.5 % to 36.0 % as the glycation time increased, and the morphology results indicated that 72 h of glycation did not destroy the structure of the nanofibers. FTIR results show that the glycation consumed the the-NH2 groups, cleaved sugar units of polysaccharide, and affected the secondary structure of the protein. The glycation enhanced the thermal stability and improved the rigidity of the nanofibers. Besides, after 120 h of glycation, the water contact angle of nanofibers increased from 0° to 79.1°, and the water vapor transmission rates decreased from 12.49 to 8.97 g mm/m2 h kPa, indicating the enhanced hydrophobicity and barrier properties. In addition, the glycation improved the water stability of the nanofibers, which increased the applicability of the gelatin/pullulan nanofibers in food packaging. The present work provides a green and efficient method for improving the physical properties of gelatin/pullulan nanofibers.
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Affiliation(s)
- Chaoyi Shen
- College of Biosystems Engineering and Food Science, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China; College of Agriculture & Biotechnology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Zian Deng
- College of Agriculture & Biotechnology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Jingshan Rao
- College of Agriculture & Biotechnology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Zhichao Yang
- College of Agriculture & Biotechnology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
| | - Yonghui Li
- Department of Grain Science and Industry, Kansas State University, Manhattan, KS 66506, USA
| | - Di Wu
- College of Biosystems Engineering and Food Science, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China; College of Agriculture & Biotechnology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China; Zhejiang University Zhongyuan Institute, Zhengzhou 450000, PR China.
| | - Kunsong Chen
- College of Agriculture & Biotechnology, Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou 310058, PR China
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Shen C, Yang Z, Rao J, Wu J, Sun C, Sun C, Wu D, Chen K. Chlorogenic acid-loaded sandwich-structured nanofibrous film developed by solution blow spinning: Characterization, release behavior and antimicrobial activity. Food Packag Shelf Life 2022. [DOI: 10.1016/j.fpsl.2022.100854] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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6
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Cao Y, Shen C, Yang Z, Cai Z, Deng Z, Wu D. Polycaprolactone/polyvinyl pyrrolidone nanofibers developed by solution blow spinning for encapsulation of chlorogenic acid. FOOD QUALITY AND SAFETY 2022. [DOI: 10.1093/fqsafe/fyac014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Study on the application of nanofibers in food active packaging has been a research hotspot in recent years. In this work, the solution blow spinning (SBS) was applied to rapidly fabricate the polycaprolactone (PCL), polyvinyl pyrrolidone (PVP), and PCL/PVP nanofibrous films to encapsulate chlorogenic acid (CGA). All the films showed uniform and smooth nanofibers, and the FTIR and XRD proved the success of mixed spinning of PCL and PVP. With the increase of PVP content, the thermal stability of the PCL/PVP nanofibrous films improved. The PCL/PVP (4:1) film possessed better mechanical properties than PCL and PVP films because of the stronger fiber-fiber interactions. The addition of PCL endowed the hydrophobic surfaces to the PCL/PVP films, and the PCL/PVP films had better water vapor barrier ability. The PCL/PVP (4:1) film exhibited the best long-term continuous release of CGA during 72 h. The PVP nanofibrous film exhibited no inhibition against S. aureus and E. coli due to the low encapsulation efficiency, but the PCL and PCL/PVP films exhibited good antimicrobial activity. The above results suggested that the nanofibrous films developed by SBS possessed the promising prospects in food packaging.
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Huang Z, Dai H, Zhang X, Wang Q, Sun J, Deng Y, Shi P. BSC2 induces multidrug resistance via contributing to the formation of biofilm in Saccharomyces cerevisiae. Cell Microbiol 2021; 23:e13391. [PMID: 34482605 DOI: 10.1111/cmi.13391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 08/31/2021] [Accepted: 09/01/2021] [Indexed: 01/18/2023]
Abstract
Biofilm plays an important role in fungal multidrug resistance (MDR). Our previous studies showed that BSC2 is involved in resistance to amphotericin B (AMB) through antioxidation in Saccharomyces cerevisiae. In this study, the overexpression of BSC2 and IRC23 induced strong MDR in S. cerevisiae. BSC2-overexpression affected cellular flocculation, cell surface hydrophobicity, biofilm formation and invasive growth. However, it failed to induce caspofungin (CAS) resistance and affect the invasive growth in FLO mutant strains (FLO11Δ, FLO1Δ, FLO8Δ and TUP1Δ). Furthermore, the overexpression of BSC2 compensated for chitin synthesis defects to maintain the cell wall integrity and significantly reduced the cell morphology abnormality induced by CAS. However, it could not repair the cell wall damage caused by CAS in the FLO mutant strains. Although BSC2 overexpression increased the level of mannose in the cell wall, DPM1 overexpression in both BY4741 and bsc2∆ could confer resistance to CAS and AMB. In addition, BSC2 overexpression significantly increased the mRNA expression of FLO11, FLO1, FLO8 and TUP1. BSC2 may function as a regulator of FLO genes and be involved in cell wall integrity in yeast. Taken together, our data demonstrate that BSC2 induces MDR in a FLO pathway-dependent manner via contributing to the formation of biofilms in S. cerevisiae. TAKE AWAYS: Overexpression of BSC2 induced strong MDR in S. cerevisiae. BSC2 affected cellular flocculation, CSH, biofilm formation and invasive growth. BSC2 could not repair the cell wall damage caused by CAS in the FLO mutants. BSC2 may function as a regulator of FLO genes to maintain cell wall integrity. BSC2 promotes biofilm formation in a FLO pathway-dependent manner to induce MDR.
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Affiliation(s)
- Zhiwei Huang
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Hongsheng Dai
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Xiaoyu Zhang
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Qiao Wang
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Jing Sun
- Qinghai Provincial Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, The Chinese Academy of Sciences, Xining, China
| | - Yunxia Deng
- Key Lab of Science & Technology of Eco-textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Ping Shi
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China
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Shen C, Cao Y, Rao J, Zou Y, Zhang H, Wu D, Chen K. Application of solution blow spinning to rapidly fabricate natamycin-loaded gelatin/zein/polyurethane antimicrobial nanofibers for food packaging. Food Packag Shelf Life 2021. [DOI: 10.1016/j.fpsl.2021.100721] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Kumar A. The Complex Genetic Basis and Multilayered Regulatory Control of Yeast Pseudohyphal Growth. Annu Rev Genet 2021; 55:1-21. [PMID: 34280314 DOI: 10.1146/annurev-genet-071719-020249] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Eukaryotic cells are exquisitely responsive to external and internal cues, achieving precise control of seemingly diverse growth processes through a complex interplay of regulatory mechanisms. The budding yeast Saccharomyces cerevisiae provides a fascinating model of cell growth in its stress-responsive transition from planktonic single cells to a filamentous pseudohyphal growth form. During pseudohyphal growth, yeast cells undergo changes in morphology, polarity, and adhesion to form extended and invasive multicellular filaments. This pseudohyphal transition has been studied extensively as a model of conserved signaling pathways regulating cell growth and for its relevance in understanding the pathogenicity of the related opportunistic fungus Candida albicans, wherein filamentous growth is required for virulence. This review highlights the broad gene set enabling yeast pseudohyphal growth, signaling pathways that regulate this process, the role and regulation of proteins conferring cell adhesion, and interesting regulatory mechanisms enabling the pseudohyphal transition. Expected final online publication date for the Annual Review of Genetics, Volume 55 is November 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Anuj Kumar
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan 48109, USA;
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Kerdi S, Qamar A, Vrouwenvelder JS, Ghaffour N. Effect of localized hydrodynamics on biofilm attachment and growth in a cross-flow filtration channel. WATER RESEARCH 2021; 188:116502. [PMID: 33065413 DOI: 10.1016/j.watres.2020.116502] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/28/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
Biofilm attachment and growth in membrane filtration systems are considerably influenced by the localized flow inside the feed channel. The present work aims to map the biofilm attachment/growth mechanism under varying flow conditions. Effect of varying clearance region (space between the spacer filament and membrane surface) on biofouling pattern is investigated by using three 3D-printed pillar spacers having different filament diameters of 340, 500, and 1000 µm while maintaining the same pillar orientation, diameter and height. Direct Numerical Simulations (DNS) and Optical Coherence Tomography (OCT) were carried out to accurately predict the local hydrodynamics behavior and in-situ monitor the biofilm formation. On spacer filaments, biofouling attachment is primarily observed in the regions where low and non-fluctuating shear stresses are present. Conversely, on membrane surface, highest biofouling attachment was observed under spacer filaments where high shear stresses are prevalent along with low clearance height. Furthermore, as filtration time progresses, the biofilm grows faster on the membrane in the center of spacer cells where low shear stress with steady hydrodynamics conditions are prevalent. The proposed hydrodynamics approach envisages a full spectrum of spacer design constraints that can lead to intrinsic biofilm mitigation while improving filtration performance of membranes based water treatment.
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Affiliation(s)
- Sarah Kerdi
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia
| | - Adnan Qamar
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia
| | - Johannes S Vrouwenvelder
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia
| | - Noreddine Ghaffour
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia.
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Yongabi D, Jooken S, Givanoudi S, Khorshid M, Deschaume O, Bartic C, Losada-Pérez P, Wübbenhorst M, Wagner P. Ionic strength controls long-term cell-surface interactions - A QCM-D study of S. cerevisiae adhesion, retention and detachment. J Colloid Interface Sci 2020; 585:583-595. [PMID: 33127054 DOI: 10.1016/j.jcis.2020.10.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/09/2020] [Accepted: 10/11/2020] [Indexed: 01/18/2023]
Abstract
Understanding microbial adhesion and retention is crucial for controlling many processes, including biofilm formation, antimicrobial therapy as well as cell sorting and cell detection platforms. Cell detachment is inextricably linked to cell adhesion and retention and plays an important part in the mechanisms involved in these processes. Physico-chemical and biological forces play a crucial role in microbial adhesion interactions and altering the medium ionic strength offers a potential means for modulating these interactions. Real-time studies on the effect of ionic strength on microbial adhesion are often limited to short-term bacterial adhesion. Therefore, there is a need, not only for long-term bacterial adhesion studies, but also for similar studies focusing on eukaryotic microbes, such as yeast. Hereby, we monitored, in real-time, S. cerevisiae adhesion on gold and silica as examples of surfaces with different surface charge properties to disclose long-term adhesion, retention and detachment as a function of ionic strength using quartz crystal microbalance with dissipation monitoring. Our results show that short- and long-term cell adhesion levels in terms of mass-loading increase with increasing ionic strength, while cells dispersed in a medium of higher ionic strength experience longer retention and detachment times. The positive correlation between the cell zeta potential and ionic strength suggests that zeta potential plays a role on cell retention and detachment. These trends are similar for measurements on silica and gold, with shorter retention and detachment times for silica due to strong short-range repulsions originating from a high electron-donicity. Furthermore, the results are comparable with measurements in standard yeast culture medium, implying that the overall effect of ionic strength applies for cells in nutrient-rich and nutrient-deficient media.
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Affiliation(s)
- Derick Yongabi
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium.
| | - Stijn Jooken
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Stella Givanoudi
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Mehran Khorshid
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Olivier Deschaume
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Carmen Bartic
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Patricia Losada-Pérez
- Université Libre de Bruxelles (ULB), Experimental Soft Matter and Thermal Physics Group, Campus La Plaine, CP223, Boulevard du Triomphe, 1050 Brussels, Belgium
| | - Michael Wübbenhorst
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Patrick Wagner
- KU Leuven, Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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Bioremediation of Aquaculture Wastewater with Algal-Bacterial Biofilm Combined with the Production of Selenium Rich Biofertilizer. WATER 2020. [DOI: 10.3390/w12072071] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The discharge of aquaculture wastewater and the excessive selenium in aquaculture effluent caused by selenium addition to aquatic feed are posing a serious risk for the marine environment. In this study, batch tests were carried out to investigate the feasibility of utilizing algal–bacterial biofilm for the treatment of selenium-rich aquaculture wastewater. The effects of four different types of commercial biofilm carriers on the attached growth of biofilms and the contaminant removal capacity were examined. The braided cotton biofilm carrier had the best performance on biofilm growth, while in an exponential growth period the dry weight density of the biofilm was above 2.0 g L−1. By utilizing the braided cotton carrier with a hydraulic retention time (HRT) of 6 days, the removal rate of N and P from the raw aquaculture wastewater was 88.5 ± 6.2% and 99.8 ± 0.2%, respectively. After that, the effects of different initial wastewater load ratios (IWLR) and HRT on the effluent quality of the treatment process were studied. The decrease in IWLR and the extension of HRT could improve the treatment performance. The effluent N, P and Se concentrations in the group with 50% IWLR and 6-day HRT were 0.75 ± 0.10 mg L−1, 0.015 ± 0.02 mg L−1, 35.2 ± 3.2 μg L−1, respectively, indicating an effective removal of the main contaminants. The algal–bacterial biofilm harvested from the batch test was rich in N, P and Se, where the Se content was 21.8 ± 3.4 mg kg−1, which has the potential to be used as an Se-rich biofertilizer.
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Enhanced Hydrophilic and Electrophilic Properties of Polyvinyl Chloride (PVC) Biofilm Carrier. Polymers (Basel) 2020; 12:polym12061240. [PMID: 32485913 PMCID: PMC7361826 DOI: 10.3390/polym12061240] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 05/26/2020] [Accepted: 05/27/2020] [Indexed: 02/02/2023] Open
Abstract
Polyvinyl chloride (PVC) biofilm carrier is used as a carrier for bacterial adsorption in wastewater treatment. The hydrophilicity and electrophilicity of its surface play an important role in the adsorption of bacteria. The PVC biofilm carrier was prepared by extruder, and its surface properties were investigated. In order to improve the hydrophilicity and electrophilic properties of the PVC biofilm carrier, polyvinyl alcohol (PVA) and cationic polyacrylamide (cPAM) were incorporated into polyvinyl chloride (PVC) by blending. Besides, the surface area of the PVC biofilm carrier was increased by azodicarbonamide modified with 10% by weight of zinc oxide (mAC). The surface contact angle of PVC applied by PVA and cPAM at 5 wt %, 15 wt % was 81.6°, which was 18.0% lower than pure PVC. It shows the significant improvement of the hydrophilicity of PVC. The zeta potential of pure PVC was −9.59 mV, while the modified PVC was 14.6 mV, which proves that the surface charge of PVC changed from negative to positive. Positive charge is more conducive to the adsorption of bacteria. It is obvious from the scanning electron microscope (SEM) images that holes appeared on the surface of the PVC biofilm carrier after adding mAC, which indicates the increase of PVC surface area.
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14
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Yongabi D, Khorshid M, Gennaro A, Jooken S, Duwé S, Deschaume O, Losada-Pérez P, Dedecker P, Bartic C, Wübbenhorst M, Wagner P. QCM-D Study of Time-Resolved Cell Adhesion and Detachment: Effect of Surface Free Energy on Eukaryotes and Prokaryotes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:18258-18272. [PMID: 32223273 DOI: 10.1021/acsami.0c00353] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cell-material interactions are crucial for many biomedical applications, including medical implants, tissue engineering, and biosensors. For implants, while the adhesion of eukaryotic host cells is desirable, bacterial adhesion often leads to infections. Surface free energy (SFE) is an important parameter that controls short- and long-term eukaryotic and prokaryotic cell adhesion. Understanding its effect at a fundamental level is essential for designing materials that minimize bacterial adhesion. Most cell adhesion studies for implants have focused on correlating surface wettability with mammalian cell adhesion and are restricted to short-term time scales. In this work, we used quartz crystal microbalance with dissipation monitoring (QCM-D) and electrical impedance analysis to characterize the adhesion and detachment of S. cerevisiae and E. coli, serving as model eukaryotic and prokaryotic cells within extended time scales. Measurements were performed on surfaces displaying different surface energies (Au, SiO2, and silanized SiO2). Our results demonstrate that tuning the surface free energy of materials is a useful strategy for selectively promoting eukaryotic cell adhesion and preventing bacterial adhesion. Specifically, we show that under flow and steady-state conditions and within time scales up to ∼10 h, a high SFE, especially its polar component, enhances S. cerevisiae adhesion and hinders E. coli adhesion. In the long term, however, both cells tend to detach, but less detachment occurs on surfaces with a high dispersive SFE contribution. The conclusions on S. cerevisiae are also valid for a second eukaryotic cell type, being the human embryonic kidney (HEK) cells on which we performed the same analysis for comparison. Furthermore, each cell adhesion phase is associated with unique cytoskeletal viscoelastic states, which are cell-type-specific and surface free energy-dependent and provide insights into the underlying adhesion mechanisms.
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Affiliation(s)
- Derick Yongabi
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Mehran Khorshid
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Alessia Gennaro
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Stijn Jooken
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Sam Duwé
- Department of Chemistry, Laboratory for Nanobiology, KU Leuven, Celestinenlaan 200 G, B-3001, Leuven, Belgium
| | - Olivier Deschaume
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Patricia Losada-Pérez
- Experimental Soft Matter and Thermal Physics Group, Université Libre de Bruxelles (ULB), Campus La Plaine, CP223, Boulevard du Triomphe, 1050 Brussels, Belgium
| | - Peter Dedecker
- Department of Chemistry, Laboratory for Nanobiology, KU Leuven, Celestinenlaan 200 G, B-3001, Leuven, Belgium
| | - Carmen Bartic
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Michael Wübbenhorst
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
| | - Patrick Wagner
- Department of Physics and Astronomy, Laboratory for Soft Matter and Biophysics, KU Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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15
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Clementz AL, Manuale D, Sanchez E, Vera C, Yori JC. Use of discards of bovine bone, yeast and carrots for producing second generation bio-ethanol. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101392] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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16
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Dimopoulou M, Renault M, Dols-Lafargue M, Albertin W, Herry JM, Bellon-Fontaine MN, Masneuf-Pomarede I. Microbiological, biochemical, physicochemical surface properties and biofilm forming ability of Brettanomyces bruxellensis. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01503-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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17
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Zhao Y, Liu D, Huang W, Yang Y, Ji M, Nghiem LD, Trinh QT, Tran NH. Insights into biofilm carriers for biological wastewater treatment processes: Current state-of-the-art, challenges, and opportunities. BIORESOURCE TECHNOLOGY 2019; 288:121619. [PMID: 31202712 DOI: 10.1016/j.biortech.2019.121619] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/03/2019] [Accepted: 06/05/2019] [Indexed: 06/09/2023]
Abstract
Biofilm carriers play an important role in attached growth systems for wastewater treatment processes. This study systematically summarizes the traditional and novel biofilm carriers utilized in biofilm-based wastewater treatment technology. The advantages and disadvantages of traditional biofilm carriers are evaluated and discussed in light of basic property, biocompatibility and applicability. The characteristics, applications performance, and mechanism of novel carriers (including slow-release carriers, hydrophilic/electrophilic modified carriers, magnetic carriers and redox mediator carriers) in wastewater biological treatment were deeply analyzed. Slow release biofilm carriers are used to provide a solid substrate and electron donor for the growth of microorganisms and denitrification for anoxic and/or anaerobic bioreactors. Carriers with hydrophilic/electrophilic modified surface are applied for promoting biofilm formation. Magnetic materials-based carriers are employed to shorten the start-up time of bioreactor. Biofilm carriers acting as redox mediators are used to accelerate biotransformation of recalcitrant pollutants in industrial wastewater.
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Affiliation(s)
- Yingxin Zhao
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Duo Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Wenli Huang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ying Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Long Duc Nghiem
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Quang Thang Trinh
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam
| | - Ngoc Han Tran
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; NUS Environmental Research Institute, National University of Singapore, 1-Create Way, #15-02 Create Tower, Singapore 138602, Singapore.
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18
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Yuan H, Zhang X, Jiang Z, Chen X, Zhang X. Quantitative Criterion to Predict Cell Adhesion by Identifying Dominant Interaction between Microorganisms and Abiotic Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3524-3533. [PMID: 30580526 DOI: 10.1021/acs.langmuir.8b03465] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cell adhesion is ubiquitous and plays an important role in various scientific and engineering problems. Herein, a quantitative criterion to predict cell adhesion was proposed by identifying the dominant interaction between microorganisms and abiotic surfaces. According to the criterion, the dominant interaction in cell adhesion could be identified as a Lewis acid-base (AB) interaction or electrostatic (EL) interaction via comparison of two expressions containing the electron-donor characteristics of the microorganism (γmv-) and abiotic surface (γsv-) and their ζ potentials (ζm, ζs). The results revealed that when dominated by the AB interaction, adhesion would decrease with increasing [Formula: see text]. However, when the EL interaction was dominant, adhesion would decrease with increasing (ζm + ζs)2. We have verified the criterion based on the adhesion of microalgae, bacteria, and fungi onto various surfaces obtained via our experiments and available in literature studies. The results demonstrated that the criterion had important implications in the prediction of cell adhesion in various applications.
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Wang SY, Sun XF, Gao WJ, Wang YF, Jiang BB, Afzal MZ, Song C, Wang SG. Mitigation of membrane biofouling by d-amino acids: Effect of bacterial cell-wall property and d-amino acid type. Colloids Surf B Biointerfaces 2018; 164:20-26. [DOI: 10.1016/j.colsurfb.2017.12.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 12/23/2017] [Accepted: 12/30/2017] [Indexed: 01/28/2023]
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20
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Ko J, Cho K, Han SW, Sung HK, Baek SW, Koh WG, Yoon JS. Hydrophilic surface modification of poly(methyl methacrylate)-based ocular prostheses using poly(ethylene glycol) grafting. Colloids Surf B Biointerfaces 2017; 158:287-294. [DOI: 10.1016/j.colsurfb.2017.07.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/13/2017] [Accepted: 07/05/2017] [Indexed: 10/19/2022]
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Nowlin K, Boseman A, Covell A, LaJeunesse D. Adhesion-dependent rupturing of Saccharomyces cerevisiae on biological antimicrobial nanostructured surfaces. J R Soc Interface 2015; 12:20140999. [PMID: 25551144 DOI: 10.1098/rsif.2014.0999] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Recent studies have shown that some nanostructured surfaces (NSS), many of which are derived from surfaces found on insect cuticles, rupture and kill adhered prokaryotic microbes. Most important, the nanoscale topography is directly responsible for this effect. Although parameters such as cell adhesion and cell wall rigidity have been suggested to play significant roles in this process, there is little experimental evidence regarding the underlying mechanisms involving NSS-induced microbial rupture. In this work, we report the NSS-induced rupturing of a eukaryotic microorganism, Saccharomyces cerevisiae. We show that the amount of NSS-induced rupture of S. cerevisiae is dependent on both the adhesive qualities of the yeast cell and the nanostructure geometry of the NSS. Thus, we are providing the first empirical evidence that these parameters play a direct role in the rupturing of microbes on NSS. Our observations of this phenomenon with S. cerevisiae, particularly the morphological changes, are strikingly similar to that reported for bacteria despite the differences in the yeast cell wall structure. Consequently, NSS provide a novel approach for the control of microbial growth and development of broad-spectrum microbicidal surfaces.
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Boons K, Noriega E, Verherstraeten N, David CC, Hofkens J, Van Impe JF. The effect of medium structure complexity on the growth of Saccharomyces cerevisiae in gelatin-dextran systems. Int J Food Microbiol 2015; 199:8-14. [PMID: 25621715 DOI: 10.1016/j.ijfoodmicro.2014.12.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/31/2014] [Accepted: 12/14/2014] [Indexed: 11/29/2022]
Abstract
As most food systems are (semi-)solid, the effect of food structure on bacterial growth has been widely acknowledged. However, studies on the growth dynamics of yeasts have neglected the effect of food structure. In this paper, the growth dynamics of the spoilage yeast Saccharomyces cerevisiae was investigated at 23.5 °C in broth, singular, homogeneous biopolymer systems and binary biopolymer systems with a heterogeneous microstructure. The biopolymers gelatin and dextran were used to introduce the different levels of structure. The metabolizing ability of gelatin and dextran by S. cerevisiae was examined. To study microbial behavior in the binary systems at the micro level, mixtures were imaged with confocal laser scanning microscopy (CLSM). Growth dynamics and microscopic images of S. cerevisiae were compared with those obtained for Escherichia coli in the same model system (Boons et al., 2014). Different phase-separated, heterogeneous microstructures were obtained by changing the amount of added gelatin and dextran. Regardless of the microstructure, S. cerevisiae was preferentially located in the dextran phase. Metabolizing ability-tests indicated that gelatin could be consumed by S. cerevisiae but in the presence of glucose, no change in gelatin concentration was observed. No indication of dextran metabolizing ability was observed. When supplementing broth with gelatin or dextran alone, an enhanced growth rate and maximum cell density were observed. This enhancement was further increased by adding a second biopolymer, introducing a heterogeneous microstructure and hence increasing the medium structure complexity. The results obtained indicate that food structure complexity plays a significant role in the growth dynamics of S. cerevisiae, an important food spoiler.
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Affiliation(s)
- Kathleen Boons
- CPMF(2)-Flemish Cluster Predictive Microbiology in Foods, Belgium(1); BioTeC-Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Leuven, Belgium.
| | - Estefanía Noriega
- CPMF(2)-Flemish Cluster Predictive Microbiology in Foods, Belgium(1); BioTeC-Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Leuven, Belgium.
| | - Niels Verherstraeten
- BioTeC-Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Leuven, Belgium.
| | | | - Johan Hofkens
- Molecular Visualization and Photonics, KU Leuven, Leuven, Belgium.
| | - Jan F Van Impe
- CPMF(2)-Flemish Cluster Predictive Microbiology in Foods, Belgium(1); BioTeC-Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Leuven, Belgium.
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24
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Potter G, Budge SM, Speers RA. Flocculation, cell surface hydrophobicity and 3-OH oxylipins in the SMA strain ofSaccharomyces pastorianus. JOURNAL OF THE INSTITUTE OF BREWING 2015. [DOI: 10.1002/jib.186] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Greg Potter
- Process Engineering and Applied Science; Dalhousie University; Halifax NS B3J 2X4 Canada
- The International Centre for Brewing and Distilling, School of Life Sciences; Heriot-Watt University; Riccarton Edinburgh EH14 4AS UK
| | - Suzanne M. Budge
- Process Engineering and Applied Science; Dalhousie University; Halifax NS B3J 2X4 Canada
| | - R. Alex Speers
- The International Centre for Brewing and Distilling, School of Life Sciences; Heriot-Watt University; Riccarton Edinburgh EH14 4AS UK
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25
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Tran CT, Kondyurin A, Chrzanowski W, Bilek MM, McKenzie DR. Increasing binding density of yeast cells by control of surface charge with allylamine grafting to ion modified polymer surfaces. Colloids Surf B Biointerfaces 2014; 122:537-544. [DOI: 10.1016/j.colsurfb.2014.07.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 06/20/2014] [Accepted: 07/15/2014] [Indexed: 10/25/2022]
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26
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Bao Y, Dai G. Time-Gradient Nitric Acid Modification of CF Biofilm-Carrier and Surface Nature Effects on Microorganism Immobilization Behavior in Wastewater. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/bbeq.2013.0054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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27
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Wang Y, Lee SM, Dykes G. The physicochemical process of bacterial attachment to abiotic surfaces: Challenges for mechanistic studies, predictability and the development of control strategies. Crit Rev Microbiol 2014; 41:452-64. [DOI: 10.3109/1040841x.2013.866072] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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28
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Tran CT, Kondyurin A, Chrzanowski W, Bilek MM, McKenzie DR. Influence of pH on yeast immobilization on polystyrene surfaces modified by energetic ion bombardment. Colloids Surf B Biointerfaces 2013; 104:145-52. [DOI: 10.1016/j.colsurfb.2012.11.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 11/12/2012] [Accepted: 11/19/2012] [Indexed: 11/25/2022]
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29
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Cell aggregations in yeasts and their applications. Appl Microbiol Biotechnol 2013; 97:2305-18. [PMID: 23397484 DOI: 10.1007/s00253-013-4735-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 01/19/2013] [Accepted: 01/21/2013] [Indexed: 12/23/2022]
Abstract
Yeasts can display four types of cellular aggregation: sexual, flocculation, biofilm formation, and filamentous growth. These cell aggregations arise, in some yeast strains, as a response to environmental or physiological changes. Sexual aggregation is part of the yeast mating process, representing the first step of meiotic recombination. The flocculation phenomenon is a calcium-dependent asexual reversible cellular aggregation that allows the yeast to withstand adverse conditions. Biofilm formation consists of multicellular aggregates that adhere to solid surfaces and are embedded in a protein matrix; this gives the yeast strain either the ability to colonize new environments or to survive harsh environmental conditions. Finally, the filamentous growth is the ability of some yeast strains to grow in filament forms. Filamentous growth can be attained by two different means, with the formation of either hyphae or pseudohyphae. Both hyphae and pseudohyphae arise when the yeast strain is under nutrient starvation conditions and they represent a means for the microbial strain to spread over a wide area to survey for food sources, without increasing its biomass. Additionally, this filamentous growth is also responsible for the invasive growth of some yeast.
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30
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Vallejo JA, Serrat M, Pérez-Portuondo I, Sánchez-Pérez A, Ageitos JM, Villa TG. A novel Kluyveromyces marxianus strain with an inducible flocculation phenotype. AMB Express 2012; 2:38. [PMID: 22838397 PMCID: PMC3431993 DOI: 10.1186/2191-0855-2-38] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 07/20/2012] [Indexed: 12/03/2022] Open
Abstract
Flocculation is a very useful phenotype for industrial yeast strains, since it facilitates cell harvest and represents an easy way of cell immobilization in continuous fermentation processes. The present work represents the first time that an inducible flocculation phenotype has been generated in a non flocculent strain of Kluyveromyces marxianus. This was accomplished by expressing Saccharomyces cerevisiae FLO5 gene in K. marxianus CECT 11769 strain. The FLO 5 gene was placed under the control of an EPG promoter, not repressed by glucose and induced by anoxia. Our experimental approach successfully generated two novel K. marxianus flocculent phenotypes: one inducible and one constitutive. The constitutive phenotype originated from deletions in the FLO5 promoter region, indicating the existence of putative upstream repressor site involved in oxygen regulation of the EPG1 promoter. The novel strains here generated had a unique set of characteristics that provided an advantage, over the wild-type strain, for the industrial co-production of ethanol and polygalacturonase.
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31
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Subhi N, Verliefde AR, Chen V, Le-Clech P. Assessment of physicochemical interactions in hollow fibre ultrafiltration membrane by contact angle analysis. J Memb Sci 2012. [DOI: 10.1016/j.memsci.2012.02.007] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Kuřec M, Brányik T. The role of physicochemical interactions and FLO genes expression in the immobilization of industrially important yeasts by adhesion. Colloids Surf B Biointerfaces 2011; 84:491-7. [DOI: 10.1016/j.colsurfb.2011.02.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 12/13/2010] [Accepted: 02/01/2011] [Indexed: 11/29/2022]
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33
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Cell signals, cell contacts, and the organization of yeast communities. EUKARYOTIC CELL 2011; 10:466-73. [PMID: 21296916 DOI: 10.1128/ec.00313-10] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Even relatively simple species have evolved mechanisms to organize individual organisms into communities, such that the fitness of the group is greater than the fitness of isolated individuals. Within the fungal kingdom, the ability of many yeast species to organize into communities is crucial for their growth and survival, and this property has important impacts both on the economy and on human health. Over the last few years, studies of Saccharomyces cerevisiae have revealed several fundamental properties of yeast communities. First, strain-to-strain variation in the structures of these groups is attributable in part to variability in the expression and functions of adhesin proteins. Second, the extracellular matrix surrounding these communities can protect them from environmental stress and may also be important in cell signaling. Finally, diffusible signals between cells contribute to community organization so that different regions of a community express different genes and adopt different cell fates. These findings provide an arena in which to view fundamental mechanisms by which contacts and signals between individual organisms allow them to assemble into functional communities.
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Abdel Aal GZ, Atekwana EA, Rossbach S, Werkema DD. Sensitivity of geoelectrical measurements to the presence of bacteria in porous media. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jg001279] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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White JS, Walker GM. Influence of cell surface characteristics on adhesion of Saccharomyces cerevisiae to the biomaterial hydroxylapatite. Antonie van Leeuwenhoek 2010; 99:201-9. [DOI: 10.1007/s10482-010-9477-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 06/15/2010] [Indexed: 10/19/2022]
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36
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Edlich A, Magdanz V, Rasch D, Demming S, Aliasghar Zadeh S, Segura R, Kähler C, Radespiel R, Büttgenbach S, Franco-Lara E, Krull R. Microfluidic reactor for continuous cultivation of Saccharomyces cerevisiae. Biotechnol Prog 2010; 26:1259-70. [DOI: 10.1002/btpr.449] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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37
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Verstrepen KJ, Fink GR. Genetic and epigenetic mechanisms underlying cell-surface variability in protozoa and fungi. Annu Rev Genet 2009; 43:1-24. [PMID: 19640229 DOI: 10.1146/annurev-genet-102108-134156] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Eukaryotic microorganisms have evolved ingenious mechanisms to generate variability at their cell surface, permitting differential adherence, rapid adaptation to changing environments, and evasion of immune surveillance. Fungi such as Saccharomyces cerevisiae and the pathogen Candida albicans carry a family of mucin and adhesin genes that allow adhesion to various surfaces and tissues. Trypanosoma cruzi, T. brucei, and Plasmodium falciparum likewise contain large arsenals of different cell surface adhesion genes. In both yeasts and protozoa, silencing and differential expression of the gene family results in surface variability. Here, we discuss unexpected similarities in the structure and genomic location of the cell surface genes, the role of repeated DNA sequences, and the genetic and epigenetic mechanisms-all of which contribute to the remarkable cell surface variability in these highly divergent microbes.
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Bayoudh S, Othmane A, Mora L, Ben Ouada H. Assessing bacterial adhesion using DLVO and XDLVO theories and the jet impingement technique. Colloids Surf B Biointerfaces 2009; 73:1-9. [DOI: 10.1016/j.colsurfb.2009.04.030] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Revised: 04/05/2009] [Accepted: 04/21/2009] [Indexed: 10/20/2022]
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39
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Direct observation of bacterial deposition onto clean and organic-fouled polyamide membranes. J Colloid Interface Sci 2009; 336:13-20. [DOI: 10.1016/j.jcis.2009.03.063] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2008] [Revised: 03/28/2009] [Accepted: 03/30/2009] [Indexed: 11/21/2022]
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40
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Tang H, Cao T, Liang X, Wang A, Salley SO, McAllister J, Ng KYS. Influence of silicone surface roughness and hydrophobicity on adhesion and colonization ofStaphylococcus epidermidis. J Biomed Mater Res A 2009; 88:454-63. [DOI: 10.1002/jbm.a.31788] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Vennapusa RR, Tari C, Cabrera R, Fernandez-Lahore M. Surface energetics to assess biomass attachment onto hydrophobic interaction adsorbents in expanded beds. Biochem Eng J 2009. [DOI: 10.1016/j.bej.2008.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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42
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Castelain M, Pignon F, Piau JM, Magnin A. The initial single yeast cell adhesion on glass via optical trapping and Derjaguin-Landau-Verwey-Overbeek predictions. J Chem Phys 2008; 128:135101. [PMID: 18397108 DOI: 10.1063/1.2842078] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We used an optical tweezer to investigate the adhesion of yeast Saccharomyces cerevisiae onto a glass substrate at the initial contact. Micromanipulation of free-living objects with single-beam gradient optical trap enabled to highlight mechanisms involved in this initial contact. As a function of the ionic strength and with a displacement parallel to the glass surface, the yeast adheres following different successive ways: (i) Slipping and rolling at 1.5 mM NaCl, (ii) slipping, rolling, and sticking at 15 mM NaCl, and (iii) only sticking at 150 mM. These observations were numerous and reproducible. A kinetic evolution of these adhesion phenomena during yeast movement was clearly established. The nature, range, and relative intensity of forces involved in these different adhesion mechanisms have been worked out as a quantitative analysis from Derjaguin-Landau-Verwey-Overbeek (DLVO) and extended DLVO theories. Calculations show that the adhesion mechanisms observed and their affinity with ionic strength were mainly governed by the Lifshitz-van der Waals interaction forces and the electrical double-layer repulsion to which are added specific contact forces linked to "sticky" glycoprotein secretion, considered to be the main forces capable of overcoming the short-range Lewis acid-base repulsions.
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Affiliation(s)
- Mickaël Castelain
- Laboratoire de Rhéologie, Université Joseph Fourier Grenoble I, Institut National Polytechnique de Grenoble, CNRS, UMR 5520, B.P. 53, F-38041 Grenoble Cedex 9, France
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Lichter JA, Thompson MT, Delgadillo M, Nishikawa T, Rubner MF, Van Vliet KJ. Substrata mechanical stiffness can regulate adhesion of viable bacteria. Biomacromolecules 2008; 9:1571-8. [PMID: 18452330 DOI: 10.1021/bm701430y] [Citation(s) in RCA: 183] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The competing mechanisms that regulate adhesion of bacteria to surfaces and subsequent biofilm formation remain unclear, though nearly all studies have focused on the role of physical and chemical properties of the material surface. Given the large monetary and health costs of medical-device colonization and hospital-acquired infections due to bacteria, there is considerable interest in better understanding of material properties that can limit bacterial adhesion and viability. Here we employ weak polyelectrolyte multilayer (PEM) thin films comprised of poly(allylamine) hydrochloride (PAH) and poly(acrylic acid) (PAA), assembled over a range of conditions, to explore the physicochemical and mechanical characteristics of material surfaces controlling adhesion of Staphylococcus epidermidis bacteria and subsequent colony growth. Although it is increasingly appreciated that eukaryotic cells possess subcellular structures and biomolecular pathways to sense and respond to local chemomechanical environments, much less is known about mechanoselective adhesion of prokaryotes such as these bacteria. We find that adhesion of viable S. epidermidis correlates positively with the stiffness of these polymeric substrata, independently of the roughness, interaction energy, and charge density of these materials. Quantitatively similar trends observed for wild-type and actin analogue mutant Escherichia coli suggest that these results are not confined to only specific bacterial strains, shapes, or cell envelope types. These results indicate the plausibility of mechanoselective adhesion mechanisms in prokaryotes and suggest that mechanical stiffness of substrata materials represents an additional parameter that can regulate adhesion of and subsequent colonization by viable bacteria.
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Affiliation(s)
- Jenny A Lichter
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Electrical detection and characterization of bacterial adhesion using electrochemical impedance spectroscopy-based flow chamber. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.01.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Vennapusa R, Hunegnaw SM, Cabrera RB, Fernández-Lahore M. Assessing adsorbent-biomass interactions during expanded bed adsorption onto ion exchangers utilizing surface energetics. J Chromatogr A 2007; 1181:9-20. [PMID: 18199439 DOI: 10.1016/j.chroma.2007.11.078] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Accepted: 11/26/2007] [Indexed: 11/17/2022]
Abstract
Biomass adhesion onto an adsorbent matrix or "interaction" as well as biological particle co-adhesion or "aggregation" can severely affect the overall performance of many direct-contact methods for downstream processing of bioproducts. Studies to quantitatively describe this biomass-adsorbent interaction were developed utilizing surface energetics. An indirect thermodynamic approach via contact angle and zeta potential measurements was utilized. Intact yeast cells, yeast homogenates, and disrupted bacterial paste were employed as model system. Various surfaces that are relevant to biochemical and environmental applications were characterized. The extended Derjaguin, Landau, Verwey, Overbeek (XDLVO) theory was found to appropriately predict biomass adhesion behaviour. It was observed that cell attachment onto anion-exchange supports is promoted by strong and close interaction within a secondary energy minimum followed by moderate multilayer cell aggregation. On the other hand, cell interaction with cation-exchange materials can take place within a reversible secondary energy minimum and at longer separation distance. The influence of particle charge and size, as well as the influence of the nature of the material under study were summarized in the form of energy vs. distance profiles. These investigations lead to many process-related conclusions: (a) process buffer conductivity windows can be recommended for anion-exchange chromatography (AEX) vs. cation-exchange chromatography (CEX) systems, (b) increased hydrodynamic shear is required to prevent biomass attachment onto AEX as compared to CEX, and (c) aggregation phenomena is a function of contact time and biomass concentration. Understanding biomass-adsorbent interaction at the particle (local) level is opening the pave for optimized operation of expanded bed adsorption methods at the process (macro) scale. A universal methodological approach is presented to guide both process and material design.
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Affiliation(s)
- RamiReddy Vennapusa
- Downstream Processing Laboratory, Jacobs University, Campus Ring 1, D-28759 Bremen, Germany
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Power L, Itier S, Hawton M, Schraft H. Time lapse confocal microscopy studies of bacterial adhesion to self-assembled monolayers and confirmation of a novel approach to the thermodynamic model. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:5622-9. [PMID: 17408298 DOI: 10.1021/la070099o] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In this study, we use thermodynamic theory to develop a novel model that allows for the quantitative determination of the Gibbs free energy of adhesion for the initial bacterial attachment process. This model eliminates the need to calculate interfacial free energies and instead relies on easily measurable contact angles to determine DeltaG(adh). We experimentally verify our model using real-time observation of the initial attachment of Pseudomonas putida to methyl- and hydroxyl-terminated self-assembled monolayers. We also test the applicability of our model to a variety of experimental conditions using data available in the literature. We show that the initial attachment process is governed by dispersion forces and is accurately predicted by our model. Also, we find that our model is simple to apply and accurate for a variety of experimental conditions.
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Affiliation(s)
- Laura Power
- Department of Physics, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1
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Sun L, Peng C, Liu H, Hu Y, Jiang J. Analogy in the adsorption of random copolymers and homopolymers at solid-liquid interface: A Monte Carlo simulation study. J Chem Phys 2007; 126:094905. [PMID: 17362125 DOI: 10.1063/1.2567301] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The adsorption of random copolymers at solid-liquid interface from a nonselective solvent has been studied by Monte Carlo simulation in a cubic lattice. The polymeric molecules are modeled as self-avoiding linear chains composed of two types of segments A and B. The effects of copolymer composition (A/B ratio), segment-surface interaction, and bulk concentration are examined on the thermodynamic and structural adsorption properties including surface coverage, adsorption amount, adsorption layer thickness, and microscopic density distribution. At a given newly introduced effective adsorption energy, random copolymers are found to behave quantitatively as homopolymers regardless of the copolymer composition and surface affinity. This remarkable analogy provides an efficient way in predicting the adsorption of random copolymers from homopolymers.
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Affiliation(s)
- Lei Sun
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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Khorasani MT, Moemenbellah S, Mirzadeh H, Sadatnia B. Effect of surface charge and hydrophobicity of polyurethanes and silicone rubbers on L929 cells response. Colloids Surf B Biointerfaces 2006; 51:112-9. [PMID: 16872811 DOI: 10.1016/j.colsurfb.2006.06.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2006] [Revised: 05/08/2006] [Accepted: 06/01/2006] [Indexed: 11/19/2022]
Abstract
Wettability and zeta potential studies were performed to characterize the hydrophobicity and surface charge of virgin and oxygen plasma irradiated silicone rubbers and polyurethane (polyether and polyesther) samples and evaluate the effect of hydrophobicity and surface charge on fibroblast cells attachment and growth. The surface properties of polyurethanes and silicones and plasma irradiated surfaces were compared by water drop contact angle and zeta potential measurement. Using SEM photomicrographs to study the morphology of virgin and plasma irradiated samples surfaces and light microscopy for study the behavior of cell attachment on these surfaces. Water drop contact angle measurements show that in despite of the silicones, the polyurethanes become more hydrophobic and have stable surface than silicones. Results show that wettability of plasma treated silicones increase and after 48 h recovery take place. Zeta potential measurements noticed that plasma treated polyetherurethane surface is more negatively charge, and consequently attachment of the L929 fibroblast cells decreased whereas on silicones surfaces, negatively charge surfaces show increase cells attachment.
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Affiliation(s)
- M T Khorasani
- Biomaterial Department of Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran.
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Current awareness on yeast. Yeast 2006. [DOI: 10.1002/yea.1316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
Yeast cells possess a remarkable capacity to adhere to abiotic surfaces, cells and tissues. These adhesion properties are of medical and industrial relevance. Pathogenic yeasts such as Candida albicans and Candida glabrata adhere to medical devices and form drug-resistant biofilms. In contrast, cell-cell adhesion (flocculation) is a desirable property of industrial Saccharomyces cerevisiae strains that allows the easy separation of cells from the fermentation product. Adhesion is conferred by a class of special cell wall proteins, called adhesins. Cells carry several different adhesins, each allowing adhesion to specific substrates. Several signalling cascades including the Ras/cAMP/PKA and MAP kinase (MAPK)-dependent filamentous growth pathways tightly control synthesis of the different adhesins. Together, these pathways trigger adhesion in response to stress, nutrient limitation or small molecules produced by the host, such as auxin in plants or NAD in mammals. In addition, adhesins are subject to subtelomeric epigenetic switching, resulting in stochastic expression patterns. Internal tandem repeats within adhesin genes trigger recombination events and the formation of novel adhesins, thereby offering fungi an endless reservoir of adhesion properties. These aspects of fungal adhesion exemplify the impressive phenotypic plasticity of yeasts, allowing them to adapt quickly to stressful environments and exploit new opportunities.
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Affiliation(s)
- Kevin J Verstrepen
- Harvard University Bauer Center for Genomics Research, 7 Divinity Avenue, Room 104, Cambridge, MA 02138, USA.
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