1
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Melchior S, Carini E, Gigliotti M, Ciuffarin F, Marino M, Innocente N, Nicoli MC, Calligaris S. Unraveling the role of probiotics in affecting the structure of monoglyceride gelled emulsions: A low-field 1H NMR study. Curr Res Food Sci 2024; 8:100724. [PMID: 38617093 PMCID: PMC11015334 DOI: 10.1016/j.crfs.2024.100724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/19/2024] [Accepted: 03/25/2024] [Indexed: 04/16/2024] Open
Abstract
The capacity of monoglyceride (MG) gelled emulsions (MEs) in protecting probiotic cells of Lacticaseibacillus rhamnosus against stresses suffered during food processing, storage, and human digestion has been recently demonstrated. These findings open new perspectives on the possible participation of probiotics in the stabilization of emulsion structure. To unravel this aspect, rheological analysis and Low-Field 1H NMR investigations were performed on MEs having different aqueous phases (water or skimmed milk) and stored for increasing time (1 and 14 days) at 4 °C. Loaded and unloaded samples were considered. Results highlighted that probiotics initially hindered the ability of MG to self-assemble in the multiphase environment, interacting in some way with MG crystalline lamellar structure, as confirmed by rheological and 1H NMR analysis. During storage, an increase of proton compartmentation was observed in loaded MEs indicating the role of probiotics in stabilizing MG structure at a molecular level. Such a result was more evident when the system was composed of milk, suggesting that the presence of milk-native components (i.e., lactose, proteins, and minerals) favored the cell-structure interactions. Such preliminary results could open new perspectives in considering probiotic cells as having an active role in the stabilization of food structure.
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Affiliation(s)
- Sofia Melchior
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/a, Udine, Italy
| | - Eleonora Carini
- Department of Food and Drug, University of Parma, Parco Area delle Scienze, 47/A, Parma, Italy
| | - Marcello Gigliotti
- Department of Food and Drug, University of Parma, Parco Area delle Scienze, 47/A, Parma, Italy
| | - Francesco Ciuffarin
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/a, Udine, Italy
| | - Marilena Marino
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/a, Udine, Italy
| | - Nadia Innocente
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/a, Udine, Italy
| | - Maria Cristina Nicoli
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/a, Udine, Italy
| | - Sonia Calligaris
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/a, Udine, Italy
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2
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Xie Z, Atherton TJ. Jamming on convex deformable surfaces. SOFT MATTER 2024; 20:1070-1078. [PMID: 38206105 DOI: 10.1039/d2sm01608g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Jamming is a fundamental transition that governs the behavior of particulate media, including sand, foams and dense suspensions. Upon compression, such media change from freely flowing to a disordered, marginally stable solid that exhibits non-Hookean elasticity. While the jamming process is well established for fixed geometries, the nature and dynamics of jamming for a diverse class of soft materials and deformable substrates, including emulsions and biological matter, remains unknown. Here we propose a new scenario, metric jamming, where rigidification occurs on a surface that has been deformed from its ground state. Unlike classical jamming processes that exhibit discrete mechanical transitions, surprisingly we find that metric jammed states possess mechanical properties continuously tunable between those of classically jammed and conventional elastic media. The compact and curved geometry significantly alters the vibrational spectra of the structures relative to jamming in flat Euclidean space, and metric jammed systems also possess new types of vibrational mode that couple particle and shape degrees of freedom. Our work provides a theoretical framework that unifies our understanding of solidification processes that take place on deformable media and lays the groundwork to exploit jamming for the control and stabilization of shape in self-assembly processes.
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Affiliation(s)
- Zhaoyu Xie
- Department of Physics & Astronomy, Tufts University, 574 Boston Ave, Medford, MA 02155, USA.
| | - Timothy J Atherton
- Department of Physics & Astronomy, Tufts University, 574 Boston Ave, Medford, MA 02155, USA.
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3
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Nejadmansouri M, Eskandari MH, Yousefi GH, Riazi M, Hosseini SMH. Promising application of probiotic microorganisms as Pickering emulsions stabilizers. Sci Rep 2023; 13:15915. [PMID: 37741896 PMCID: PMC10517997 DOI: 10.1038/s41598-023-43087-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 09/19/2023] [Indexed: 09/25/2023] Open
Abstract
The purpose of this work was to study the ability of nineteen food-grade microorganisms as Pickering emulsion (PE) stabilizers. Medium-chain triacylglycerol (MCT) oil-in-water (50:50) PEs were fabricated by 10 wt% or 15 wt% of thermally-inactivated yeast, cocci, Bacillus spp. and lactobacilli cells. The characteristics of microorganisms related to "Pickering stabilization" including morphology, surface charge, interfacial tension, and "contact angle" were firstly studied. After that, the cells-stabilized PEs were characterized from both kinetic and thermodynamic viewpoints, microstructure and rheological properties. The interfacial tension and "contact angle" values of various microorganisms ranged from 16.33 to 38.31 mN/m, and from 15° to 106°, respectively. The mean droplet size of PEs ranged from 11.51 to 57.69 µm. Generally, the physical stability of cell-stabilized PEs followed this order: lactobacilli > Bacillus spp. > cocci > yeast. These variations were attributed to the morphology and cell wall composition. Increasing the microorganism concentration significantly increased the physical stability of PEs from a maximum of 12 days at 10 wt% to 35 days at 15 wt% as a result of better interface coverage. Shear-thinning and dominant elastic behaviors were observed in PEs. Physical stability was affected by the free energy of detachment. Therefore, food-grade microorganisms are suggested for stabilizing PEs.
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Affiliation(s)
- Maryam Nejadmansouri
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran
| | - Mohammad Hadi Eskandari
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran
| | - Gholam Hossein Yousefi
- Department of Pharmaceutics, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Masoud Riazi
- Enhanced Oil Recovery (EOR) Research Centre, IOR/EOR Research Institute, Shiraz University, Shiraz, Iran
- Department of Petroleum Engineering, School of Chemical and Petroleum Eng, Shiraz University, Shiraz, Iran
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4
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Prasad M, Obana N, Lin SZ, Zhao S, Sakai K, Blanch-Mercader C, Prost J, Nomura N, Rupprecht JF, Fattaccioli J, Utada AS. Alcanivorax borkumensis biofilms enhance oil degradation by interfacial tubulation. Science 2023; 381:748-753. [PMID: 37590351 DOI: 10.1126/science.adf3345] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 06/21/2023] [Indexed: 08/19/2023]
Abstract
During the consumption of alkanes, Alcanivorax borkumensis will form a biofilm around an oil droplet, but the role this plays during degradation remains unclear. We identified a shift in biofilm morphology that depends on adaptation to oil consumption: Longer exposure leads to the appearance of dendritic biofilms optimized for oil consumption effected through tubulation of the interface. In situ microfluidic tracking enabled us to correlate tubulation to localized defects in the interfacial cell ordering. We demonstrate control over droplet deformation by using confinement to position defects, inducing dimpling in the droplets. We developed a model that elucidates biofilm morphology, linking tubulation to decreased interfacial tension and increased cell hydrophobicity.
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Affiliation(s)
- M Prasad
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - N Obana
- Transborder Medical Research Center, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - S-Z Lin
- Aix Marseille Univ, Université de Toulon, CNRS, CPT (UMR 7332), Turing Centre for Living systems, Marseille, France
| | - S Zhao
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - K Sakai
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL Université, Sorbonne Université, CNRS, 75005 Paris, France
- Institut Pierre-Gilles de Gennes pour la Microfluidique, 75005 Paris, France
| | - C Blanch-Mercader
- Laboratoire Physico-Chimie Curie UMR168, Institut Curie, Paris Sciences et Lettres, Centre National de la Recherche Scientifique, Sorbonne Université, 75248 Paris, France
| | - J Prost
- Laboratoire Physico-Chimie Curie UMR168, Institut Curie, Paris Sciences et Lettres, Centre National de la Recherche Scientifique, Sorbonne Université, 75248 Paris, France
- Mechanobiology Institute, National University of Singapore, 117411 Singapore
| | - N Nomura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- TARA center, Univeristy of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - J-F Rupprecht
- Aix Marseille Univ, Université de Toulon, CNRS, CPT (UMR 7332), Turing Centre for Living systems, Marseille, France
| | - J Fattaccioli
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL Université, Sorbonne Université, CNRS, 75005 Paris, France
- Institut Pierre-Gilles de Gennes pour la Microfluidique, 75005 Paris, France
| | - A S Utada
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
- Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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5
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Zhang H, Zhang W, Zong Y, Kong D, Zhao K. Factors Influencing Pseudomonas aeruginosa Initial Adhesion and Evolution at the Dodecane-Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:11274-11282. [PMID: 37524061 DOI: 10.1021/acs.langmuir.3c00901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Bacterial adhesion and evolution at the oil-water interface are important for a broad range of applications such as food manufacturing and microbial-enhanced oil recovery, etc. However, our understanding on bacterial interfacial adhesion and evolution, particularly at the single-cell level, is still far from complete. In this work, by employing Pseudomonas aeruginosa PAO1 at the dodecane-water interface as a model system, we have studied the effects of different factors on bacterial interfacial adhesion and the dynamic evolution of bacterial interfacial behavior at the single-cell level. The results show that PAO1 cells displayed a chemotactic behavior toward dodecane. Among the tested factors, bacterial initial interfacial attachment showed a negative correlation with the secreted cell-surface associated lipopolysaccharide and Psl while a positive correlation with type IV pili. Adding nonbiological surfactant Pluronic F-127, as expected, greatly reduced the cell interfacial adhesion. More importantly, the dynamics analysis of cell attachment/detachment at the dodecane-water interface over a long-time scale revealed a reversible to irreversible attachment transition of cells. This transition is accompanied with the interface aging resulting from bacterial activities, which led to an increase of the interfacial viscoelasticity with time and finally the formation of the gel-like interface. Further analysis demonstrated the important role of exopolysaccharides in the latter process. Our findings provide more details of bacterial oil-water interfacial behavior at the single-cell level and may shed light on developing new strategies for controlling bacterial colonization at the oil-water interface.
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Affiliation(s)
- Hong Zhang
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Wenchao Zhang
- School of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yiwu Zong
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Dongyang Kong
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Kun Zhao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
- The Sichuan Provincial Key Laboratory for Human Disease Gene Study and The Institute of Laboratory Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
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6
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Das S. Cell surface hydrophobicity and petroleum hydrocarbon degradation by biofilm-forming marine bacterium Pseudomonas furukawaii PPS-19 under different physicochemical stressors. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131795. [PMID: 37301070 DOI: 10.1016/j.jhazmat.2023.131795] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/19/2023] [Accepted: 06/05/2023] [Indexed: 06/12/2023]
Abstract
Biofilm-forming marine bacterium Pseudomonas furukawaii PPS-19 showed strong hydrophobicity under different physicochemical stressors, such as pH and salinity. Strong aggregation of P. furukawaii PPS-19 was observed at hydrophobic interfaces of n-dodecane and crude oil, while uptake of pyrene resulted in blue fluorescence of the bacterium. Changes in biofilm microcolonies were observed under different physicochemical stressors with maximum biofilm thickness of 15.15 µm and 15.77 µm at pH 7% and 1% salinity, respectively. Relative expression analysis of alkB2 gene revealed the maximum expression in n-dodecane (10.5 fold) at pH 7 (1 fold) and 1% salinity (8.3 fold). During the degradation process, a significant drop in surface tension resulted in increased emulsification activity. P. furukawaii PPS-19 showed the respective n-dodecane and pyrene degradation of 94.3% and 81.5% at pH 7% and 94.5% and 83% at 1% salinity. A significant positive correlation was obtained between cell surface hydrophobicity (CSH), biofilm formation, and PHs degradation (P < 0.05) under all the physicochemical stressors, with the highest value at pH 7% and 1% salinity. Analysis of metabolites indicated that mono-terminal oxidation and multiple pathways were followed for n-dodecane and pyrene biodegradation, respectively. Thus, P. furukawaii PPS-19 is an efficient hydrocarbonoclastic bacterium that may be exploited for large-scale oil pollution abatement.
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Affiliation(s)
- Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela 769 008, Odisha, India.
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7
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Dong R, Wan Z, Wang X, Bai Y, Bao M, Li H. The Role of Bacteria in the Formation and Migration of Oil-Particle Aggregates (OPAs) after Marine Oil Spills and the Associated Mechanism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7018-7028. [PMID: 37083415 DOI: 10.1021/acs.est.3c00647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Oil spills interact with mineral particles to form oil-particle aggregates (OPAs), which promotes the oil's natural diffusion and biodegradation. We investigated the effect of bacteria on the formation and vertical migration of OPAs under different concentrations and types of particles and proposed and elucidated an oil-particle-bacteria coupling mechanism. The depth of particle penetration into oil droplets (13-17 μm) was more than twice that of the nonbacterial group. Oil that remained in the water column and deposited to the bottom decreased from 87% to 49% and increased from 14% to 15% at high/low concentration, respectively. Interestingly, the median droplet diameter showed a negative correlation (R2 = 0.83) and positive correlation (R2 = 0.60) at high/low concentration, respectively, with the relative penetration depth first proposed. We further demonstrated that bacteria increased the penetrating depth by a combination of reducing/increasing the interfacial tension, reducing the oil amount (C17-C38) in the OPAs, and increasing the particle width. These effects reduced the droplet size and ultimately changed the vertical migration of OPAs. Finally, we provided a simple assessment of the vertical distribution of OPAs in nearshore environments based on experimental data and suggested that the role of bacteria in increasing the depth of particles penetrating into the oil droplets should not be ignored. These findings will broaden the research perspective of marine oil spill migration.
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Affiliation(s)
- Ranran Dong
- Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, People's Republic of China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China
| | - Zhifeng Wan
- School of Marine Sciences, Sun Yat-sen University/Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, People's Republic of China
| | - Xinping Wang
- North China Sea Environmental Monitoring Center, State Oceanic Administration, Qingdao 266033, People's Republic of China
| | - Yan Bai
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, People's Republic of China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, People's Republic of China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China
| | - Haoshuai Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, People's Republic of China
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, People's Republic of China
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8
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Mohd Isa NS, El Kadri H, Vigolo D, Gkatzionis K. The Effect of Bacteria on the Stability of Microfluidic-Generated Water-in-Oil Droplet. MICROMACHINES 2022; 13:2067. [PMID: 36557366 PMCID: PMC9785555 DOI: 10.3390/mi13122067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/02/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Microencapsulation in emulsion droplets has great potential for various applications such as food which require formation of highly stable emulsions. Bacterial-emulsion interactions affect the physiological status of bacteria while bacterial cell characteristics such as surface-active properties and metabolic activity can affect emulsion stability. In this study, the viability and growth of two different bacterial species, Gram-negative Escherichia coli and Gram-positive Lactobacillus paracasei, encapsulated in water-in-oil (W/O) droplets or as planktonic cells, were monitored and their effect on droplet stability was determined. Microencapsulation of bacteria in W/O droplets with growth media or water was achieved by using a flow-focusing microfluidic device to ensure the production of highly monodispersed droplets. Stability of W/O droplets was monitored during 5 days of storage. Fluorescence microscopy was used to observe bacterial growth behaviour. Encapsulated cells showed different growth to planktonic cells. Encapsulated E. coli grew faster initially followed by a decline in viability while encapsulated L. paracasei showed a slow gradual growth throughout storage. The presence of bacteria increased droplet stability and a higher number of dead cells was found to provide better stability due to high affinity towards the interface. The stability of the droplets is also species dependent, with E. coli providing better stability as compared to Lactobacillus paracasei.
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Affiliation(s)
- Nur Suaidah Mohd Isa
- School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia
| | - Hani El Kadri
- School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
| | - Daniele Vigolo
- School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
- School of Biomedical Engineering, The University of Sydney, Sydney, NSW 2006, Australia
- The University of Sydney Nano Institute, The University of Sydney, Sydney, NSW 2006, Australia
| | - Konstantinos Gkatzionis
- School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UK
- Department of Food Science and Nutrition, University of the Aegean, Metropolite Ioakeim 2, 81400 Myrina, Lemnos, Greece
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9
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Enzymatic modification and adsorption of hydrophobic zein proteins on lactic acid bacteria stabilize Pickering emulsions. Food Res Int 2022; 161:111783. [DOI: 10.1016/j.foodres.2022.111783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/08/2022] [Accepted: 08/17/2022] [Indexed: 11/22/2022]
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10
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Mycoprotein as novel functional ingredient: Mapping of functionality, composition and structure throughout the Quorn fermentation process. Food Chem 2022; 396:133736. [PMID: 35872494 DOI: 10.1016/j.foodchem.2022.133736] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 07/08/2022] [Accepted: 07/15/2022] [Indexed: 11/21/2022]
Abstract
This study provides the first mapping of mycoprotein functionality, composition and structure throughout the Quorn fermentation process. The fermentation broth, RNA-reduced broth (RNA-broth), centrate and their centrifugation deposits and supernatants were characterised. The broth, RNA-broth and their deposits displayed high concentrations of fungal filaments, which contributed to their high gelling properties (with a 5,320 Pa elastic modulus reported for RNA-broth deposits gels). Foams prepared with RNA-broth and centrate supernatants via frothing exhibited high stability (380 min), with high concentrations of a foam-positive cerato-platanin reported in these samples. Emulsions prepared with the broth and broth supernatant showed high emulsifying activity and stability indexes (12.80 m2/g and 15.84 mins for the broth supernatant) and low oil droplet sizes (18.09 µm for the broth). This study identified previously unreported gelling, foaming and/or emulsifying properties for the different Quorn streams, highlighting opportunities to develop novel sustainable alternatives to animal-derived functional ingredients using mycoprotein material.
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11
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Pan T, Liu C, Wang M, Zhang J. Interfacial biodegradation of phenanthrene in bacteria-carboxymethyl cellulose-stabilized Pickering emulsions. Appl Microbiol Biotechnol 2022; 106:3829-3836. [PMID: 35536403 DOI: 10.1007/s00253-022-11952-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/25/2022] [Accepted: 04/29/2022] [Indexed: 11/27/2022]
Abstract
The limited bioavailability of PAHs in non-aqueous phase liquid (NAPL) limits their degradation. The biodegradation of phenanthrene in n-tetradecane by hydrophilic bacterium Moraxella sp. CFP312 was studied with the assistance of two polymers, chitosan and carboxymethyl cellulose (CMC). Both chitosan and CMC improved the cell hydrophobicity of CFP312 and increased the contact angle of CFP312 cells from 30.4 to 78.5 and 88.5, respectively. However, CMC increased the degradation ratio of phenanthrene from 45 to nearly 100%, while chitosan did not cause any improvement. We found that CMC was more effective than chitosan in promoting CFP312 to stabilize Pickering emulsion. In the bacteria-CMC complex system, oil was dispersed into small droplets to obtain a high emulsification index and large specific surface area. Moreover, according to the microscopic image of the bacteria-CMC emulsion droplet, we observed that the droplet surface was tightly covered by the CFP312 cells. Therefore, CFP312 cells joined with CMC can utilize phenanthrene in oil phase at the oil-water interface. This study will offer a new strategy for effective microbial degradation of hydrophobic compounds in NAPLs by hydrophilic bacteria. KEY POINTS: • Biodegradation of phenanthrene in Pickering emulsions • Pickering emulsions stabilized by hydrophilic CFP312 joined with CMC. • Phenanthrene was degraded by CFP312 at oil-water interface.
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Affiliation(s)
- Tao Pan
- Jiangxi Province Key Laboratory of Mining and Metallurgy Environmental Pollution Control, and School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China.
| | - Congyang Liu
- Jiangxi Province Key Laboratory of Mining and Metallurgy Environmental Pollution Control, and School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Meini Wang
- Jiangxi Province Key Laboratory of Mining and Metallurgy Environmental Pollution Control, and School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Jiameng Zhang
- Jiangxi Province Key Laboratory of Mining and Metallurgy Environmental Pollution Control, and School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
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12
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Werner M, Glück MS, Bräuer B, Bismarck A, Lieberzeit PA. Investigations on sub-structures within cavities of surface imprinted polymers using AFM and PF-QNM. SOFT MATTER 2022; 18:2245-2251. [PMID: 35234796 DOI: 10.1039/d2sm00137c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Investigations on lithographically formed cavities of surface-imprinted polymers (SIP) can help to gain deeper understanding on cell recognition with SIPs: it is known that surface topography and biomolecules transferred during surface imprinting contribute to cell adhesion. In this work, SIPs synthesized via two different imprinting techniques, namely stamp imprinting and polymerization of Pickering emulsions, were investigated and compared to each other, using atomic force microscopy (AFM) and Peak Force Quantitative Nano Mechanics (PF-QNM). We focused on SIPs based on poly(styrene-co-divinylbenzene) as model polymer and E. coli as model template for cell imprinting. Both imprinting approaches led to cavities that revealed nanostructures within the imprints. Stamp imprinting cavities feature low surface roughness and channel structures that resemble the negative pattern of the bacteria on the stamp and their filaments, while SIPs synthesized via polymerization of Pickering emulsions reveal globular nanostructures accumulating in the imprints. AFM phase imaging and adhesion mapping using PF-QNM show that these globular structures are remainders of the imprinted E. coli cells, most likely lipopolysaccarides, which is not observable in imprints resulting from stamp imprinting.
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Affiliation(s)
- Martin Werner
- University of Vienna, Faculty for Chemistry, Department of Physical Chemistry, Währingerstraße 42, 1090 Vienna, Austria.
| | - Matthias S Glück
- University of Vienna, Faculty for Chemistry, Department of Physical Chemistry, Währingerstraße 42, 1090 Vienna, Austria.
| | - Birgit Bräuer
- University of Vienna, Faculty for Chemistry, Department of Physical Chemistry, Währingerstraße 42, 1090 Vienna, Austria.
| | - Alexander Bismarck
- University of Vienna, Faculty for Chemistry, Department of Materials Chemistry, Währingerstraße 42, 1090 Vienna, Austria
| | - Peter A Lieberzeit
- University of Vienna, Faculty for Chemistry, Department of Physical Chemistry, Währingerstraße 42, 1090 Vienna, Austria.
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13
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Koroleva MY, Yurtov EV. Pickering emulsions: properties, structure, using as colloidosomes and stimuli-responsive emulsions. RUSSIAN CHEMICAL REVIEWS 2022. [DOI: 10.1070/rcr5024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach. COLLOIDS AND INTERFACES 2021. [DOI: 10.3390/colloids5040049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
For microbial enhanced oil recovery (MEOR), different mechanisms have been introduced. In some of these papers, the phenomena and mechanisms related to biosurfactants produced by certain microorganisms were discussed, while others studied the direct impacts of the properties of microorganisms on the related mechanisms. However, there are only very few papers dealing with the direct impacts of microorganisms on interfacial properties. In the present work, the interfacial properties of three bacteria MJ02 (Bacillus Subtilis type), MJ03 (Pseudomonas Aeruginosa type), and RAG1 (Acinetobacter Calcoaceticus type) with the hydrophobicity factors 2, 34, and 79% were studied, along with their direct impact on the water/heptane interfacial tension (IFT), dilational interfacial visco-elasticity, and emulsion stability. A relationship between the adsorption dynamics and IFT reduction with the hydrophobicity of the bacteria cells is found. The cells with highest hydrophobicity (79%) exhibit a very fast dynamic of adsorption and lead to relatively large interfacial elasticity values at short adsorption time. The maximum elasticity values (at the studied frequencies) are observed for bacteria cells with the intermediate hydrophobicity factor (34%); however, at longer adsorption times. The emulsification studies show that among the three bacteria, just RAG1 provides a good capability to stabilize crude oil in brine emulsions, which correlates with the observed fast dynamics of adsorption and high elasticity values at short times. The salinity of the aqueous phase is also discussed as an important factor for the emulsion formation and stabilization.
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15
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Santos TP, Michelon M, Carvalho MS, Cunha RL. Formation and stability of oil-in-water emulsions based on components of bioprocesses: A microfluidic analysis. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Chen X, Hou Y, Cheng H, Bao M, Li Y. Rapid capturing of oil-degrading bacteria by engineered attapulgite and their synergistic remediation for oil spill. J Colloid Interface Sci 2021; 604:272-280. [PMID: 34265685 DOI: 10.1016/j.jcis.2021.06.137] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 05/31/2021] [Accepted: 06/23/2021] [Indexed: 11/17/2022]
Abstract
HYPOTHESIS High-efficiency dispersion and enhanced biodegradation play important roles in the treatment of oily wastewater. Due to the flaws of chemical surfactants, it is necessary to study the alternative dispersants that are eco-friendly and sustainable. Therefore, applying natural attapulgite (ATP) to coat Brevibacillus parabrevis for dispersion and biodegradation was studied. EXPERIMENTS To capture negatively charged bacteria in water, ATP was modified by positively charged Poly (allylamine hydrochloride) (PAH). The capturing capability of Poly (allylamine hydrochloride)-attapulgite (PAH-ATP) particles for bacterial cells, emulsification of PAH-ATP particles and bacteria on oil, toxicity of PAH-ATP to bacteria, biodegradation of oil, etc., were comprehensively investigated. FINDINGS PAH-ATP modified bacteria show a highly effective emulsification for oil due to the synergism of PAH-ATP and bacteria. The emulsion stabilized by (PAH-ATP)@bacteria presents small and stable oil droplets in one month, which is benefit for the following biodegradation. Compared with bare bacteria and PAH-ATP, PAH-ATP can capture bacteria to the surface of the oil droplets which can greatly improve the degradation of oil pollution. Importantly, the presence of PAH-ATP does not inhibit the reproduction and activity of bacteria. Treatment of oily wastewater by combining natural nanoparticles and oil-degrading bacteria has the advantages of economy, environmental protection, and sustainability.
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Affiliation(s)
- Xiuping Chen
- Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China
| | - Yajie Hou
- Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China
| | - Hua Cheng
- Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China
| | - Yiming Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, P.R. China.
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Jiang X, Shekarforoush E, Muhammed MK, Whitehead K, Simonsen AC, Arneborg N, Risbo J. Efficient chemical hydrophobization of lactic acid bacteria - One-step formation of double emulsion. Food Res Int 2021; 147:110460. [PMID: 34399460 DOI: 10.1016/j.foodres.2021.110460] [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: 02/28/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 10/21/2022]
Abstract
A novel concept of stabilizing multiple-phase food structure such as emulsion using solely the constitutional bacteria enables an all-natural food grade formulation and thus a clean label declaration. In this paper, we propose an efficient approach to hydrophobically modifying the surface of lactic acid bacteria Lactobacillus rhamnosus (LGG) using lauroyl ahloride (LC) in non-aqueous media. Compared to the unmodified bacteria, cell hydrophobicity was dramatically altered upon modification, according to the higher percentages of microbial adhesion to hexadecane (MATH) and water contact angles (WCA) of LC-modified bacteria. No evident changes were found in bacterial surface charge before and after LC modification. By using one-step homogenization, all the modified bacteria were able to generate stabile water-in-oil-in-water (W/O/W) double emulsions where bacteria were observed on oil-water interfaces of the primary and secondary droplets. Modification using high LC concentrations (10 and 20 w/w%) led to rapid autoaggregation of bacteria in aqueous solution. A long-term lethal effect of modification primarily came from lyophilization and no apparent impact was detected on the instantaneous culturability of modified bacteria.
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Affiliation(s)
- Xiaoyi Jiang
- University of Copenhagen, Department of Food Science, Rolighedsvej 30, DK-1958 Copenhagen, Denmark
| | | | - Musemma Kedir Muhammed
- University of Copenhagen, Department of Food Science, Rolighedsvej 30, DK-1958 Copenhagen, Denmark
| | - Kathryn Whitehead
- Manchester Metropolitan University, Department of Life Sciences, Chester St, Manchester M15GD, United Kingdom
| | - Adam Cohen Simonsen
- University of Southern Denmark, Department of Physics, Chemistry and Pharmacy (FKF), Campusvej 55, DK-5230 Odense M, Denmark
| | - Nils Arneborg
- University of Copenhagen, Department of Food Science, Rolighedsvej 30, DK-1958 Copenhagen, Denmark
| | - Jens Risbo
- University of Copenhagen, Department of Food Science, Rolighedsvej 30, DK-1958 Copenhagen, Denmark.
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18
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Dupont H, Maingret V, Schmitt V, Héroguez V. New Insights into the Formulation and Polymerization of Pickering Emulsions Stabilized by Natural Organic Particles. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00225] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hanaé Dupont
- Centre de Recherche Paul Pascal, CNRS, UMR 5031, Univ. Bordeaux, 115 avenue du Dr Albert Schweitzer, 33600 Pessac, France
- Laboratoire de Chimie des Polymères Organiques, CNRS, Bordeaux INP, UMR 5629, Bordeaux, Univ. Bordeaux, 16 Avenue Pey-Berland, F-33607 Pessac, France
| | - Valentin Maingret
- Centre de Recherche Paul Pascal, CNRS, UMR 5031, Univ. Bordeaux, 115 avenue du Dr Albert Schweitzer, 33600 Pessac, France
- Laboratoire de Chimie des Polymères Organiques, CNRS, Bordeaux INP, UMR 5629, Bordeaux, Univ. Bordeaux, 16 Avenue Pey-Berland, F-33607 Pessac, France
| | - Véronique Schmitt
- Centre de Recherche Paul Pascal, CNRS, UMR 5031, Univ. Bordeaux, 115 avenue du Dr Albert Schweitzer, 33600 Pessac, France
| | - Valérie Héroguez
- Laboratoire de Chimie des Polymères Organiques, CNRS, Bordeaux INP, UMR 5629, Bordeaux, Univ. Bordeaux, 16 Avenue Pey-Berland, F-33607 Pessac, France
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19
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Xie H, Zhao W, Ali DC, Zhang X, Wang Z. Interfacial biocatalysis in bacteria-stabilized Pickering emulsions for microbial transformation of hydrophobic chemicals. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02243h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The Pickering emulsion interface is an exceptional habitat for bacteria to grow by simultaneously utilizing hydrophobic and hydrophilic chemicals.
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Affiliation(s)
- Haisheng Xie
- State Key Laboratory of Microbial Metabolism
- Engineering Research Center of Cell & Therapeutic Antibody
- Ministry of Education
- School of Pharmacy
- Shanghai Jiao Tong University
| | - Wenyu Zhao
- State Key Laboratory of Microbial Metabolism
- Engineering Research Center of Cell & Therapeutic Antibody
- Ministry of Education
- School of Pharmacy
- Shanghai Jiao Tong University
| | - Daniel Chikere Ali
- State Key Laboratory of Microbial Metabolism
- Engineering Research Center of Cell & Therapeutic Antibody
- Ministry of Education
- School of Pharmacy
- Shanghai Jiao Tong University
| | - Xuehong Zhang
- State Key Laboratory of Microbial Metabolism
- School of Life Science and Biotechnology
- Shanghai Jiao Tong University
- Shanghai 200240
- China
| | - Zhilong Wang
- State Key Laboratory of Microbial Metabolism
- Engineering Research Center of Cell & Therapeutic Antibody
- Ministry of Education
- School of Pharmacy
- Shanghai Jiao Tong University
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20
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Designing biotechnological processes to reduce emulsions formation and improve oil recovery: Study of antifoams application. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107745] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Benhamou M, Kaidi H, Hachem EK. Effective pair-potentials between droplets with end-grafted polymers within Pickering emulsions versus grafting-density, solvent quality and monomer concentration and phase diagrams architectures. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Leonaviciene G, Leonavicius K, Meskys R, Mazutis L. Multi-step processing of single cells using semi-permeable capsules. LAB ON A CHIP 2020; 20:4052-4062. [PMID: 33006353 DOI: 10.1039/d0lc00660b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Droplet microfluidics technology provides a powerful approach to isolate and process millions of single cells simultaneously. Despite many exciting applications that have emerged based on this technology, workflows based on multi-step operations, including molecular biology and cell-based phenotypic screening assays, cannot be easily adapted to droplet format. Here, we present a microfluidics-based technique to isolate single cells, or biological samples, into semi-permeable hydrogel capsules and perform multi-step biological workflows on thousands to millions of individual cells simultaneously. The biochemical reactions are performed by changing the aqueous buffer surrounding the capsules, without needing sophisticated equipment. The semi-permeable nature of the capsules' shell retains large encapsulated biomolecules (such as genome) while allowing smaller molecules (such as proteins) to passively diffuse. In contrast to conventional hydrogel bead assays, the approach presented here improves bacterial cell retention during multi-step procedures as well as the efficiency of biochemical reactions. We showcase two examples of capsule use for single genome amplification of bacteria, and expansion of individual clones into isogenic microcolonies for later screening for biodegradable plastic production.
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Affiliation(s)
- Greta Leonaviciene
- Institute of Biotechnology, Life Science Centre, Vilnius University, 7 Sauletekio av., Vilnius, LT-10257, Lithuania.
| | - Karolis Leonavicius
- Institute of Biotechnology, Life Science Centre, Vilnius University, 7 Sauletekio av., Vilnius, LT-10257, Lithuania.
| | - Rolandas Meskys
- Institute of Biochemistry, Life Science Centre, Vilnius University, 7 Sauletekio av., Vilnius, LT-10257, Lithuania
| | - Linas Mazutis
- Institute of Biotechnology, Life Science Centre, Vilnius University, 7 Sauletekio av., Vilnius, LT-10257, Lithuania.
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23
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Biophysical methods to quantify bacterial behaviors at oil-water interfaces. J Ind Microbiol Biotechnol 2020; 47:725-738. [PMID: 32743734 DOI: 10.1007/s10295-020-02293-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 07/16/2020] [Indexed: 02/03/2023]
Abstract
Motivated by the need for improved understanding of physical processes involved in bacterial biodegradation of catastrophic oil spills, we review biophysical methods to probe bacterial motility and adhesion at oil-water interfaces. This review summarizes methods that probe bulk, average behaviors as well as local, microscopic behaviors, and highlights opportunities for future work to bridge the gap between biodegradation and biophysics.
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24
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Medina-Moreno SA, Conde-Báez L, Jiménez-González A, Aguilar-López R, Rodríguez-Vázquez R, Tec-Caamal EN. Modelling hexadecane uptake strategies of a rhizospheric bacterial consortium under different hydrodynamic draft-tube airlift reactor conditions. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Almoughrabie S, Ngari C, Guillier L, Briandet R, Poulet V, Dubois-Brissonnet F. Rapid assessment and prediction of the efficiency of two preservatives against S. aureus in cosmetic products using High Content Screening-Confocal Laser Scanning Microscopy. PLoS One 2020; 15:e0236059. [PMID: 32716948 PMCID: PMC7384607 DOI: 10.1371/journal.pone.0236059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 06/26/2020] [Indexed: 11/18/2022] Open
Abstract
Most cosmetic products are susceptible to microbiological spoilage due to contaminations that could happen during fabrication or by consumer’s repetitive manipulation. The composition of cosmetic products must guarantee efficient bacterial inactivation all along with the product shelf life, which is usually assessed by challenge-tests. A challenge-test consists in inoculating specific bacteria, i.e. Staphylococcus aureus, in the formula and then investigating the bacterial log reduction over time. The main limitation of this method is relative to the time-consuming protocol, where 30 days are needed to obtain results. In this study, we have proposed a rapid alternative method coupling High Content Screening—Confocal Laser Scanning Microscopy (HCS-CLSM), image analysis and modeling. It consists in acquiring real-time S. aureus inactivation kinetics on short-time periods (typically 4h) and in predicting the efficiency of preservatives on longer scale periods (up to 7 days). The action of two preservatives, chlorphenesin and benzyl alcohol, was evaluated against S. aureus at several concentrations in a cosmetic matrix. From these datasets, we compared two secondary models to determine the logarithm reduction time (Dc) for each preservative concentration. Afterwards, we used two primary inactivation models to predict log reductions for up to 7 days and we compared them to observed log reductions. The IQ model better fits datasets and the Q value gives information about the matrix level of interference.
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Affiliation(s)
- Samia Almoughrabie
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, France
| | | | - Laurent Guillier
- Direction de l’évaluation des risques, ANSES, Agence nationale de sécurité de l’alimentation, de l’environnement et du travail, Maisons-Alfort, France
| | - Romain Briandet
- Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, Jouy-en-Josas, France
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26
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Dumont E, Picard C, Guillerm M, Granero Fernandez E, Stavrakakis C, Norrant E, Juery C, Lesage N, Rouxel F, Balannec B, Amrane A, Couvert A. Separation of silicone oil droplets dispersed in activated sludge. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1758942] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Eric Dumont
- UMR CNRS 6144 GEPEA, École des Mines de Nantes, La Chantrerie, Nantes, France
| | - Charlotte Picard
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, Rennes, France
| | - Maxime Guillerm
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, Rennes, France
| | | | | | - Edith Norrant
- UCB BioPharma Sprl, Avenue de l’Industrie, Braine l’Alleud, Belgium
| | | | | | | | - Beatrice Balannec
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, Rennes, France
| | - Abdeltif Amrane
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, Rennes, France
| | - Annabelle Couvert
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR 6226, Rennes, France
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27
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Mosaic-CLSM Assessment of Bacterial Spatial Distribution in Cosmetic Matrices According to Matrix Viscosity and Bacterial Hydrophobicity. COSMETICS 2020. [DOI: 10.3390/cosmetics7020032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The reliability of the challenge test depends, among other parameters, on the spatial distribution of microorganisms in the matrix. The present study aims to quickly identify factors that are susceptible to impair a uniform distribution of inoculated bacteria in cosmetic matrices in this context. We used mosaic confocal laser scanning microscopy (M-CLSM) to obtain rapid assessment of the impact of the composition and viscosity of cosmetic matrices on S. aureus spatial distribution. Several models of cosmetic matrices were formulated with different concentrations of two thickeners and were inoculated with three S. aureus strains having different levels of hydrophobicity. The spatial distribution of S. aureus in each matrix was evaluated according to the frequency distribution of the fluorescence values of at least 1350 CLSM images. We showed that, whatever the thickener used, an increasingly concentration of thickener results in increasingly bacterial clustered distribution. Moreover, higher bacterial hydrophobicity also resulted in a more clustered spatial distribution. In conclusion, CLSM-based method allows a rapid characterization of bacterial spatial distribution in complex emulsified systems. Both matrix viscosity and bacterial surface hydrophobicity affect the bacterial spatial distribution which can have an impact on the reliability of bacterial enumeration during challenge test.
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28
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Wiltschi B, Cernava T, Dennig A, Galindo Casas M, Geier M, Gruber S, Haberbauer M, Heidinger P, Herrero Acero E, Kratzer R, Luley-Goedl C, Müller CA, Pitzer J, Ribitsch D, Sauer M, Schmölzer K, Schnitzhofer W, Sensen CW, Soh J, Steiner K, Winkler CK, Winkler M, Wriessnegger T. Enzymes revolutionize the bioproduction of value-added compounds: From enzyme discovery to special applications. Biotechnol Adv 2020; 40:107520. [DOI: 10.1016/j.biotechadv.2020.107520] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 10/18/2019] [Accepted: 01/13/2020] [Indexed: 12/11/2022]
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29
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Thermostable endoglucanase gene derived by amplification from the genomic DNA of a cellulose-enriched mixed culture from mudspring water of Mt. Makiling, Laguna, Philippines. World J Microbiol Biotechnol 2020; 36:51. [PMID: 32157408 DOI: 10.1007/s11274-020-02825-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 02/29/2020] [Indexed: 10/24/2022]
Abstract
Culture-independent molecular-based approaches can be used to identify genes of interest from environmental sources that have desirable properties such as thermo activity. For this study, a putative thermo stable endoglucanase gene was identified from a mixed culture resulting from the inoculation of Brock-CMcellulose (1%) broth with mudspring water from Mt. Makiling, Laguna, Philippines that had been incubated at 90 °C. Genomic DNA was extracted from the cellulose-enriched mixed culture and endo1949 forward and reverse primers were used to amplify the endoglucanase gene, which was cloned into pCR-script plasmid vector. Blastn alignment of the sequenced insert revealed 99.69% similarity to the glycosyl hydrolase, sso1354 (CelA1; Q97YG7) from Saccharolobus solfataricus. The endoglucanase gene (GenBank accession number MK984682) was determined to be 1,021 nucleotide bases in length, corresponding to 333 amino acids with a molecular mass of ~ 37 kDa. The endoglucanase gene was inserted into a pET21 vector and transformed in E. coli BL21 for expression. Partially purified recombinant Mt. Makiling endoglucanase (MM-Engl) showed a specific activity of 187.61 U/mg and demonstrated heat stability up to 80 °C. The thermo-acid stable endoglucanase can be used in a supplementary hydrolysis step to further hydrolyze the lignocellulosic materials that were previously treated under high temperature-dilute acid conditions, thereby enhancing the release of more glucose sugars for bioethanol production.
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Desai N, Ardekani AM. Biofilms at interfaces: microbial distribution in floating films. SOFT MATTER 2020; 16:1731-1750. [PMID: 31976509 DOI: 10.1039/c9sm02038a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cellular motility is a key function guiding microbial adhesion to interfaces, which is the first step in the formation of biofilms. The close association of biofilms and bioremediation has prompted extensive research aimed at comprehending the physics of microbial locomotion near interfaces. We study the dynamics and statistics of microorganisms in a 'floating biofilm', i.e., a confinement with an air-liquid interface on one side and a liquid-liquid interface on the other. We use a very general mathematical model, based on a multipole representation and probabilistic simulations, to ascertain the spatial distribution of microorganisms in films of different viscosities. Our results reveal that microorganisms can be distributed symmetrically or asymmetrically across the height of the film, depending on their morphology and the ratio of the film's viscosity to that of the fluid substrate. Long-flagellated, elongated bacteria exhibit stable swimming parallel to the liquid-liquid interface when the bacterial film is less viscous than the underlying fluid. Bacteria with shorter flagella on the other hand, swim away from the liquid-liquid interface and accumulate at the free surface. We also analyze microorganism dynamics in a flowing film and show how a microorganism's ability to resist 'flow-induced-erosion' from interfaces is affected by its elongation and mode of propulsion. Our study generalizes past efforts on understanding microorganism dynamics under confinement by interfaces and provides key insights on biofilm initiation at liquid-liquid interfaces.
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Affiliation(s)
- Nikhil Desai
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Arezoo M Ardekani
- School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA.
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31
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Cheng H, Li Z, Li Y, Shi Z, Bao M, Han C, Wang Z. Multi-functional magnetic bacteria as efficient and economical Pickering emulsifiers for encapsulation and removal of oil from water. J Colloid Interface Sci 2020; 560:349-358. [DOI: 10.1016/j.jcis.2019.10.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 12/19/2022]
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32
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Lonchamp J, Akintoye M, Clegg PS, Euston SR. Sonicated extracts from the Quorn fermentation co-product as oil-lowering emulsifiers and foaming agents. Eur Food Res Technol 2020. [DOI: 10.1007/s00217-020-03443-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Abstract
This study assessed the impact of sonication on the structure and properties of a functional extract (retentate 100 or R100) from the Quorn fermentation co-product (centrate). In a previous study, we reported that the R100 fraction displayed good foaming, emulsifying and rheological properties. Sonication of a R100 solution led to the breakdown of the large hyphal structures characteristic of this extract into smaller fragments. Foams prepared with sonicated R100 displayed a higher foaming ability than with untreated R100 and a high foam stability but lower than untreated R100 ones. Oil-in-water emulsions prepared with sonicated R100 displayed smaller oil droplet size distributions than with untreated R100. Confocal micrographs suggested that small fungal fragments contributed to the stabilisation of oil droplets. 50% oil-reduced R100 emulsions were prepared by mixing R100 emulsions (untreated or sonicated) with a sonicated R100 solution at a 1:1 ratio. Smaller oil droplet size distributions were reported for the oil-reduced emulsions. These results showed that the addition of small hyphal fragments or surface-active molecules and molecular aggregates released during sonication contributed to the formation and stabilisation of smaller oil droplets. This study highlighted the potential to modulate the structure, emulsifying and foaming properties of functional extracts from the Quorn fermentation co-product by sonication and the potential of these extracts as oil-lowering agents in emulsion-based products through the reduction of oil droplet size and their stabilisation.
Graphical abstract
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33
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Song J, Babayekhorasani F, Spicer PT. Soft Bacterial Cellulose Microcapsules with Adaptable Shapes. Biomacromolecules 2019; 20:4437-4446. [PMID: 31661248 DOI: 10.1021/acs.biomac.9b01143] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Microcapsules with controlled stability and permeability are in high demand for applications in separation and encapsulation. We have developed a biointerfacial process to fabricate strong, but flexible, porous microcapsules from bacterial cellulose at an oil-water emulsion interface. A broad range of microcapsule sizes has been successfully produced, from 100 μm to 5 cm in diameter. The three-dimensional capsule microstructure was imaged using confocal microscopy, showing a cellulose membrane thickness of around 30 μm that is highly porous, with some pores larger than 0.5 μm that are permeable to most macromolecules by free diffusion but can exclude larger structures like bacteria. The mechanical deformation of cellulose microcapsules reveals their flexibility, enabling them to pass through constrictions with a much smaller diameter than their initial size by bending and folding. Our work provides a new approach for producing soft, permeable, and biocompatible microcapsules for substance encapsulation and protection. The capsules may offer a replacement for suspended polymer beads in commercial applications and could potentially act as a framework for artificial cells.
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Affiliation(s)
- Jie Song
- School of Chemical Engineering , UNSW Australia , Sydney NSW 2052 , Australia
| | | | - Patrick T Spicer
- School of Chemical Engineering , UNSW Australia , Sydney NSW 2052 , Australia
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Albert C, Beladjine M, Tsapis N, Fattal E, Agnely F, Huang N. Pickering emulsions: Preparation processes, key parameters governing their properties and potential for pharmaceutical applications. J Control Release 2019; 309:302-332. [DOI: 10.1016/j.jconrel.2019.07.003] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Revised: 07/05/2019] [Accepted: 07/06/2019] [Indexed: 12/18/2022]
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Tarazanova M, Huppertz T, Starrenburg M, Todt T, van Hijum S, Kok J, Bachmann H. Transcriptional response of Lactococcus lactis during bacterial emulsification. PLoS One 2019; 14:e0220048. [PMID: 31344087 PMCID: PMC6657864 DOI: 10.1371/journal.pone.0220048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 07/08/2019] [Indexed: 12/25/2022] Open
Abstract
Microbial surface properties are important for interactions with the environment in which cells reside. Surface properties of lactic acid bacteria significantly vary and some strains can form strong emulsions when mixed with a hydrocarbon. Lactococcus lactis NCDO712 forms oil-in-water emulsions upon mixing of a cell suspension with petroleum. In the emulsion the bacteria locate at the oil-water interphase which is consistent with Pickering stabilization. Cells of strain NCDO712 mixed with sunflower seed oil did not stabilize the oil droplets. This study shows that the addition of either ethanol or ammonium sulfate led to cell aggregation, which subsequently allowed stabilizing oil-in-water emulsions. From this, we conclude that bacterial cell aggregation is important for emulsion droplet stabilization. To determine how bacterial emulsification influences the microbial transcriptome RNAseq analysis was performed on lactococci taken from the oil-water interphase. In comparison to cells in suspension 72 genes were significantly differentially expressed with a more than 4-fold difference. The majority of these genes encode proteins involved in transport processes and the metabolism of amino acids, carbohydrates and ions. Especially the proportion of genes belonging to the CodY regulon was high. Our results also point out that in a complex environment such as food fermentations a heterogeneous response of microbes might be caused by microbe-matrix interactions. In addition, microdroplet technologies are increasingly used in research. The understanding of interactions between bacterial cells and oil-water interphases is of importance for conducting and interpreting such experiments.
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Affiliation(s)
- Mariya Tarazanova
- TI Food and Nutrition, AN Wageningen, The Netherlands
- NIZO, Ede BA, The Netherlands
- Molecular Genetics, University of Groningen, Groningen, The Netherlands
| | - Thom Huppertz
- TI Food and Nutrition, AN Wageningen, The Netherlands
- NIZO, Ede BA, The Netherlands
| | - Marjo Starrenburg
- TI Food and Nutrition, AN Wageningen, The Netherlands
- NIZO, Ede BA, The Netherlands
- Molecular Genetics, University of Groningen, Groningen, The Netherlands
| | - Tilman Todt
- Radboud University Medical Centre CMBI, Geert Grooteplein Nijmegen, The Netherlands
- HAN, University of Applied Sciences, PGL Nijmegen, The Netherlands
| | - Sacha van Hijum
- TI Food and Nutrition, AN Wageningen, The Netherlands
- NIZO, Ede BA, The Netherlands
- Radboud University Medical Centre CMBI, Geert Grooteplein Nijmegen, The Netherlands
| | - Jan Kok
- TI Food and Nutrition, AN Wageningen, The Netherlands
- Molecular Genetics, University of Groningen, Groningen, The Netherlands
| | - Herwig Bachmann
- TI Food and Nutrition, AN Wageningen, The Netherlands
- NIZO, Ede BA, The Netherlands
- * E-mail:
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Röllig R, Plikat C, Ansorge‐Schumacher MB. Efficient and Selective Carboligation with Whole‐Cell Biocatalysts in Pickering Emulsion. Angew Chem Int Ed Engl 2019; 58:12960-12963. [DOI: 10.1002/anie.201907209] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Robert Röllig
- Chair of Molecular Biotechnology Technische Universität Dresden 01062 Dresden Germany
| | - Christoph Plikat
- Chair of Molecular Biotechnology Technische Universität Dresden 01062 Dresden Germany
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Röllig R, Plikat C, Ansorge‐Schumacher MB. Efficient and Selective Carboligation with Whole‐Cell Biocatalysts in Pickering Emulsion. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907209] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Robert Röllig
- Chair of Molecular Biotechnology Technische Universität Dresden 01062 Dresden Germany
| | - Christoph Plikat
- Chair of Molecular Biotechnology Technische Universität Dresden 01062 Dresden Germany
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García-Cruz NU, Valdivia-Rivera S, Narciso-Ortiz L, García-Maldonado JQ, Uribe-Flores MM, Aguirre-Macedo ML, Lizardi-Jiménez MA. Diesel uptake by an indigenous microbial consortium isolated from sediments of the Southern Gulf of Mexico: Emulsion characterisation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 250:849-855. [PMID: 31085470 DOI: 10.1016/j.envpol.2019.04.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/09/2019] [Accepted: 04/22/2019] [Indexed: 05/23/2023]
Abstract
In this study a microbial consortium, dominated by members of the genera Marinobacter and Alcanivorax (Gammaproteobacteria) isolated from marine sediments of Southern Gulf of Mexico, was assessed to grow in a bubble column bioreactor using 13 g L-1 of diesel (aliphatic and aromatic hydrocarbons mix including nonane and hexadecane) as the sole carbon source. The consortium was able to produce 3.3 g L-1 of biomass, measured as suspended solids. Microbial growth was detectable, even substrate depletion, after 8 days of cultivation. The emulsifier activity and its influence on the droplet size were also evaluated: it was observed that droplet diameter decreases as emulsifier activity increases. The bubble column bioreactor system proposed in this research could be used as a biotechnological process for the remediation of a contaminated body in important petrochemical regions, for example, Veracruz, México, where some points of sea and fresh-water bodies were analysed to find nonane and hexadecane in all sample water. It is important due to a lack of information, regarding hydrocarbon pollution in this port area, is filled.
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Affiliation(s)
- N U García-Cruz
- Centro de Investigación y de Estudios Avanzados-Mérida, Antigua carretera a Progreso Km 6, Cordemex, Loma Bonita Xcumpich, C.P. 97310, Mérida, Yucatán, Mexico
| | - S Valdivia-Rivera
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C. Unidad Sureste, Tableje Catastral 31264 Km 5.5, Carretera Sierra Papacal-Chuburna Puerto, Parque Científico Tecnológico de Yucatán, C.P. 97302, Mérida, Yucatán, Mexico
| | - L Narciso-Ortiz
- Instituto Tecnológico Superior de Tierra Blanca, Avenida Veracruz Sin Número Esquina Héroes de Puebla, Colonia Pemex, C.P. 95180, Tierra Blanca, Veracruz, Mexico
| | - J Q García-Maldonado
- CONACYT- Centro de Investigación y de Estudios Avanzados-Mérida, Antigua carretera a Progreso Km 6, Cordemex, Loma Bonita Xcumpich, C.P. 97310, Mérida, Yucatán, Mexico
| | - M M Uribe-Flores
- Centro de Investigación y de Estudios Avanzados-Mérida, Antigua carretera a Progreso Km 6, Cordemex, Loma Bonita Xcumpich, C.P. 97310, Mérida, Yucatán, Mexico
| | - M L Aguirre-Macedo
- Centro de Investigación y de Estudios Avanzados-Mérida, Antigua carretera a Progreso Km 6, Cordemex, Loma Bonita Xcumpich, C.P. 97310, Mérida, Yucatán, Mexico
| | - M A Lizardi-Jiménez
- CONACYT-Universidad Autónoma de San Luis Potosí, Sierra Leona 550, Lomas Segunda Sección, C.P. 78210, San Luis Potosí, Mexico.
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Foaming, emulsifying and rheological properties of extracts from a co-product of the Quorn fermentation process. Eur Food Res Technol 2019. [DOI: 10.1007/s00217-019-03287-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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40
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Li K, Qian J, Wang P, Wang C, Fan X, Lu B, Tian X, Jin W, He X, Guo W. Toxicity of Three Crystalline TiO 2 Nanoparticles in Activated Sludge: Bacterial Cell Death Modes Differentially Weaken Sludge Dewaterability. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4542-4555. [PMID: 30888807 DOI: 10.1021/acs.est.8b04991] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The eco-toxicities of different crystalline phases of TiO2-NPs are controversial, and the effects and mechanisms on activated sludge are unclear. Therefore, we assessed the acute-toxicities (8-h exposure) of P25, anatase, and rutile TiO2-NPs in activated sludge using flow cytometry under simulated sunlight (hereafter-sun) and evaluated the relationship between sludge dewatering and bacterial cell death modes using Pearson's correlation coefficients ( r). Additionally, the response of the microbial community structure was examined by high throughput sequencing. Bacterial survival and death were observed by confocal laser scanning microscopy. Toxicity indicators (e.g., lactate dehydrogenase (LDH) and reactive oxygen species (ROS)) were determined. Overall, TiO2-NPs toxicity was concentration-dependent and crystalline-phase-dependent. The responses of bacterial communities to crystalline phases were more obvious than that of dosage. P25-sun and anatase-sun caused necrosis-like cell death via strong photo-oxidation confirmed by 131%/123% (1 mg/L) and 301%/254% (50 mg/L) LDH released by the control, while rutile-sun induced apoptosis-like death via intracellular ROS production increased to 165% (1 mg/L) and 420% (50 mg/L) of the control. P25 and anatase NPs had higher protein and polysaccharide affinities, while rutile NPs exhibited stronger attachment onto phospholipids. TiO2-NPs-sun reduced activated sludge dewaterability. Specific resistance to filtration (SRF) showed the strongest positive correlation with tightly bound extracellular polymeric substances (EPS) and total soluble microbial byproducts ( r = 0.974, p < 0.01) and was closely related to EPS content and composition, especially the increased bound water (BW) content and sludge protein concentrations. High Pearson correlation coefficients were observed between early apoptotic cells and BW content ( r = 0.952, p < 0.01) resulting from massive polysaccharides and between necrotic (including late apoptotic) cells and SRF ( r = 0.959, p < 0.01) resulting from high protein and EPS concentrations. Thus, in response to TiO2-NPs, bacterial cell death modes differentially weakened sludge dewatering.
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Affiliation(s)
- Kun Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Jin Qian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Xiulei Fan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Bianhe Lu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Xin Tian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Wen Jin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Xixian He
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education , Hohai University , Nanjing , People's Republic of China , 210098
- College of Environment , Hohai University , Nanjing , People's Republic of China , 210098
| | - Wenzhou Guo
- College of Science , Hohai University , Nanjing , People's Republic of China , 210098
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41
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Jiang X, Yucel Falco C, Dalby KN, Siegumfeldt H, Arneborg N, Risbo J. Surface engineered bacteria as Pickering stabilizers for foams and emulsions. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.10.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Shintani M, Sugiyama K, Sakurai T, Yamada K, Kimbara K. Biodegradation of A-fuel oil in soil samples with bacterial mixtures of Rhodococcus and Gordonia strains under low temperature conditions. J Biosci Bioeng 2018; 127:197-200. [PMID: 30082218 DOI: 10.1016/j.jbiosc.2018.07.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 07/13/2018] [Accepted: 07/19/2018] [Indexed: 11/18/2022]
Abstract
Bioaugmentation is an effective treatment to clean up polluted sites using contaminant-degrading bacteria. However, this treatment is influenced by various environmental conditions, including temperature. In this study, an effective bioaugmentation system under low temperature condition was developed with three Rhodococcus (strains A, C, and D) and one Gordonia (strain B) oil-degraders, which are officially permitted for bioaugmentation applications in Japan. The oil-degrading ability of each strain and mixture was assessed in liquid culture and in model soils supplemented with A-fuel oil. In liquid culture, Rhodococcus strains A and C degraded the A-fuel oil in cold temperature conditions (15°C and 10°C) as well as in mesophilic condition (30°C). In the model soil samples, the mixture of four degraders was the most effective at removing the A-fuel oil under mesophilic condition (>90%), suggesting that strains B and/or D might have factors that promote degradation. In contrast, A-fuel oil was efficiently removed (>80%) in the soil samples inoculated with A or C as well as that with mixture in cold temperature condition, suggesting that strains A and C were the major degraders under cold condition. Our results indicate that the four degraders could be applied to the bioaugmentation in cold areas.
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Affiliation(s)
- Masaki Shintani
- Applied Chemistry and Biochemical Engineering Course, Department of Engineering, Graduate School of Integrated Science and Technology, 3-5-1 Johoku, Nakaku-ku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Kengo Sugiyama
- Applied Chemistry and Biochemical Engineering Course, Department of Engineering, Graduate School of Integrated Science and Technology, 3-5-1 Johoku, Nakaku-ku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Takuma Sakurai
- Applied Chemistry and Biochemical Engineering Course, Department of Engineering, Graduate School of Integrated Science and Technology, 3-5-1 Johoku, Nakaku-ku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Kota Yamada
- Department of Environment and Energy System, Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Nakaku-ku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Kazuhide Kimbara
- Applied Chemistry and Biochemical Engineering Course, Department of Engineering, Graduate School of Integrated Science and Technology, 3-5-1 Johoku, Nakaku-ku, Hamamatsu, Shizuoka 432-8561, Japan; Department of Environment and Energy System, Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Nakaku-ku, Hamamatsu, Shizuoka 432-8561, Japan.
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43
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Qian J, Li K, Wang P, Wang C, Liu J, Tian X, Lu B, Guan W. Unraveling adsorption behavior and mechanism of perfluorooctane sulfonate (PFOS) on aging aquatic sediments contaminated with engineered nano-TiO 2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:17878-17889. [PMID: 29679275 DOI: 10.1007/s11356-018-1984-4] [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: 11/06/2017] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
Engineered nano-TiO2 (Enano-TiO2) have inevitably discharged into aquatic sediments that resulted from their widespread use. The physicochemical characteristics of sediments might be changed because of remarkable properties of Enano-TiO2 and affected by the aging of sediments, thereby altering the environmental behavior and bioavailability of other pollutants such as perfluorooctane sulfonate (PFOS) in sediments. Here, adsorption behavior and mechanism of PFOS on aging aquatic sediments spiked with Enano-TiO2 at a weight ratio of 5.0% were investigated. The results showed that Enano-TiO2 significantly altered zero points of charge (pHzpc) and pore surface properties of sediments, manifested as pHzpc, the total surface area (SBET), the micro-pore surface area (Smicro), and the external surface area (Sext) of sediment particles contaminated with Enano-TiO2 clearly increased, instead average pore size decreased. Rapid intra-particle diffusion processes were well fitted by the pseudo-second-order rate model with the sorption rate (K2) following the order single (5.764 mg/(g·h)) > binary systems (3.393 mg/(g·h)). Freundlich model best described the sorption isotherm data with the larger sorption capacity (KF) and sorption affinity (1/n) of sediments spiked with Enano-TiO2 than that of sediments only. Additionally, Enano-TiO2 changed the adsorption thermodynamics of PFOS on the sediments with the absolute value of ∆G0, ∆H0, and ∆S0 increased. Fourier transform infrared (FT-IR) spectroscopy suggested possible formation of a negative charge-assisted H-bond between PFOS and the functionalities on sediment surfaces, including O-H of carboxyl, alcohol, phenols, and chemisorbed H2O as well as carbonyl groups (C=O) of ketone groups. Furthermore, the multilayer sorption of PFOS on sediments contaminated with Enano-TiO2 is plausible because of bridging effect of Cu2+ and Pb2+.
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Affiliation(s)
- Jin Qian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China.
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China.
| | - Kun Li
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China
| | - Peifang Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China.
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China.
| | - Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China
| | - Jingjing Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China
| | - Xin Tian
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China
| | - Bianhe Lu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China
| | - Wenyi Guan
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 210098, Nanjing, People's Republic of China
- College of Environment, Hohai University, 210098, Nanjing, People's Republic of China
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Abbasi A, Bothun GD, Bose A. Attachment of Alcanivorax borkumensis to Hexadecane-In-Artificial Sea Water Emulsion Droplets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5352-5357. [PMID: 29656641 DOI: 10.1021/acs.langmuir.8b00082] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Alcanivorax borkumensis (AB) is a marine bacterium that dominates bacterial communities around many oil spills because it enzymatically degrades the oil while using it as a nutrient source. Several dispersants have been used to produce oil-in-water emulsions following a spill. Compared to surface slicks, the additional oil-water surface area produced by emulsification provides greater access to the oil and accelerates its degradation. We deliberately cultured AB cells using hexadecane as the only nutrient source. We then examined the first critical step of the biodegradation process, the attachment of these AB cells to hexadecane-water interfaces, using fluorescence microscopy and cryogenic scanning electron microscopy. The hexadecane-in-artificial sea water (ASW) emulsions were produced by gentle shaking and were stabilized either by AB alone, by Corexit 9500, by Tween 20, or by carbon black particles. When no dispersants were used, AB stabilizes the emulsion, and bacterial cells attach to the hexadecane droplets within the first 3 days. When Corexit 9500 was used as the dispersant, AB did not attach to the hexadecane droplets over 3 days, and many AB cells in the aqueous phase appeared dead. Only limited attachment was observed after 7 days. No AB attachment was observed over 3 days when Tween 20 was used as the dispersant. However, the bacteria used Tween 20 in the ASW as a nutrient. Large amounts of AB attached to carbon black stabilized hexadecane droplets within 3 days. An analysis that accounts for van der Waals and electrostatic interactions is unable to predict all of these observations, indicating that the attachment of AB to the hexadecane is a complex phenomenon that goes beyond simple physiochemical effects. While these experiments do not mimic conditions in the open ocean where the large amount of water dilutes any emulsion stabilizer, they provide important insights on bacteria adhesion to oil, a critical step in the oil degradation process following a marine spill.
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Affiliation(s)
- Akram Abbasi
- Department of Chemical Engineering , University of Rhode Island , Kingston , Rhode Island 02881 , United States
| | - Geoffrey D Bothun
- Department of Chemical Engineering , University of Rhode Island , Kingston , Rhode Island 02881 , United States
| | - Arijit Bose
- Department of Chemical Engineering , University of Rhode Island , Kingston , Rhode Island 02881 , United States
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45
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El Kadri H, Lalou S, Mantzouridou F, Gkatzionis K. Utilisation of water-in-oil-water (W 1 /O/W 2 ) double emulsion in a set-type yogurt model for the delivery of probiotic Lactobacillus paracasei. Food Res Int 2018; 107:325-336. [DOI: 10.1016/j.foodres.2018.02.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/15/2018] [Accepted: 02/18/2018] [Indexed: 12/25/2022]
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46
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Pedraza-de la Cuesta S, Keijzers L, van der Wielen LAM, Cuellar MC. Integration of Gas Enhanced Oil Recovery in Multiphase Fermentations for the Microbial Production of Fuels and Chemicals. Biotechnol J 2018; 13:e1700478. [DOI: 10.1002/biot.201700478] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 12/21/2017] [Indexed: 11/07/2022]
Affiliation(s)
| | - Lore Keijzers
- Department of Biotechnology, Delft University of Technology; van der Maasweg 9 2629HZ Delft The Netherlands
| | - Luuk A. M. van der Wielen
- Department of Biotechnology, Delft University of Technology; van der Maasweg 9 2629HZ Delft The Netherlands
- Bernal Institute, University of Limerick; Castletroy Limerick Ireland
- BE-Basic Foundation; Mijnbouwstraat 120 2628 RX Delft The Netherlands
| | - Maria C. Cuellar
- Department of Biotechnology, Delft University of Technology; van der Maasweg 9 2629HZ Delft The Netherlands
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47
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McLay RB, Nguyen HN, Jaimes-Lizcano YA, Dewangan NK, Alexandrova S, Rodrigues DF, Cirino PC, Conrad JC. Level of Fimbriation Alters the Adhesion of Escherichia coli Bacteria to Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1133-1142. [PMID: 28976770 DOI: 10.1021/acs.langmuir.7b02447] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Adhesion of bacteria to interfaces is the first step in pathogenic infection, in biofilm formation, and in bioremediation of oil spills and other pollutants. Bacteria use a variety of surface structures to promote interfacial adhesion, with the level of expression of these structures varying in response to local conditions and environmental signals. Here, we investigated how overexpression of type 1 fimbriae, one such appendage, modifies the ability of Escherichia coli to adhere to solid substrates, via biofilm formation and yeast agglomeration, and to oil/water interfaces, via a microbial adhesion to hydrocarbon assay. A plasmid that enables inducible expression of E. coli MG1655 type 1 fimbriae was transformed into fimbriae-deficient mutant strain MG1655ΔfimA. The level of fimH gene expression in the engineered strain, measured using quantitative real-time PCR, could be tuned by changing the concentration of inducer isopropyl β-d-1-thiogalactopyranoside (IPTG), and was higher than that in strain MG1655. Increasing the degree of fimbriation only slightly modified the surface energy and zeta potential of the bacteria, but enhanced their ability to agglomerate yeast cells and to adhere to solid substrates (as measured by biofilm formation) and to oil/water interfaces. We anticipate that the tunable extent of fimbriation accessible with this engineered strain can be used to investigate how adhesin expression modifies the ability of bacteria to adhere to interfaces and to actively self-assemble there.
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Affiliation(s)
- Ryan B McLay
- Department of Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204-4004, United States
| | - Hang N Nguyen
- Department of Civil and Environmental Engineering, University of Houston , Houston, Texas 77204-4003, United States
| | - Yuly Andrea Jaimes-Lizcano
- Department of Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204-4004, United States
| | - Narendra K Dewangan
- Department of Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204-4004, United States
| | - Simone Alexandrova
- Department of Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204-4004, United States
| | - Debora F Rodrigues
- Department of Civil and Environmental Engineering, University of Houston , Houston, Texas 77204-4003, United States
| | - Patrick C Cirino
- Department of Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204-4004, United States
- Department of Biology and Biochemistry, University of Houston , Houston, Texas 77204-5008, United States
| | - Jacinta C Conrad
- Department of Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204-4004, United States
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48
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Kryachko Y. Novel approaches to microbial enhancement of oil recovery. J Biotechnol 2018; 266:118-123. [DOI: 10.1016/j.jbiotec.2017.12.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 12/01/2017] [Accepted: 12/18/2017] [Indexed: 01/06/2023]
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Li Y, Gong H, Cheng H, Wang L, Bao M. Individually immobilized and surface-modified hydrocarbon-degrading bacteria for oil emulsification and biodegradation. MARINE POLLUTION BULLETIN 2017; 125:433-439. [PMID: 28969907 DOI: 10.1016/j.marpolbul.2017.09.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 09/05/2017] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
Effective emulsification plays an important role in the treatment of marine oil spills. The negative effects of chemical surfactants have necessitated a search for alternative dispersant that are sustainable and environmentally-friendly. To identify alternate dispersants, oil-in-seawater emulsions stabilized by hydrocarbon-degrading bacteria were investigated. After individual immobilization and surface-modification, the hydrocarbon-degrading bacteria, Bacillus cereus S-1, was found to produce a stable oil-in-seawater Pickering emulsion, which was similar to particle emulsifiers. The individual immobilization and surface-modification process improved the surface hydrophobicity and wettability of the bacterial cells, which was responsible for their effective adsorption at the oil-water interface. Through effective emulsification, the biodegradation of oil was remarkably facilitated by these treated bacteria, because of the increased interfacial area. By combining the emulsification and biodegradation, the results of this reported work demonstrated a novel approach for developing environmentally-friendly bioremediation technology in the field of oil treatment.
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Affiliation(s)
- Yiming Li
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China
| | - Haiyue Gong
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China
| | - Hua Cheng
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China
| | - Lisha Wang
- College of Chemistry and Chemical Engineering, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China
| | - Mutai Bao
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Songling Road, Qingdao 266100, Shandong Province, China.
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50
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Incorporation of water-in-oil-in-water (W 1 /O/W 2 ) double emulsion in a set-type yogurt model. Food Res Int 2017; 100:122-131. [DOI: 10.1016/j.foodres.2017.08.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 08/07/2017] [Accepted: 08/12/2017] [Indexed: 11/18/2022]
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