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Optimization of the incubation parameters for biogenic synthesis of WO 3 nanoparticles using Taguchi method. Heliyon 2022; 8:e10640. [PMID: 36158110 PMCID: PMC9494235 DOI: 10.1016/j.heliyon.2022.e10640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/05/2022] [Accepted: 09/08/2022] [Indexed: 11/21/2022] Open
Abstract
Green synthesis of metal nanoparticles is gathering attention due to eco-friendly processing. Tungsten oxide (WO3) nanoparticles have immense applications as semiconductors, antimicrobials and photo thermal materials but their synthesis using biological systems is hitherto unpublicized. The paper discusses synthesis of WO3 nanoparticles using Stenotrophomonas maltophilia and the optimization of physico-chemical parameters of incubation which influence the growth and metabolism of the bacterium and consequently the size of the WO3 nanoparticles. The biogenic synthesis of WO3 nanoparticles was confirmed by ATR-FTIR and X-ray diffraction analysis. Taguchi and analysis of variance method was applied to optimize the physico-chemical parameters (pH, temperature, time, aeration rate and concentration), considering particle size and poly dispersity index (PDI) of the nanoparticles as the experimental responses. Under the design of experiments technique, Taguchi's L27 array was selected to determine the optimal process parameters which could significantly reduce the particle size and PDI of WO3 nanoparticles. Statistical analysis by signal-to-noise ratio, regression analysis and ANOVA (95% confidence level) on experimental responses confirmed pH and aeration as most influential while temperature and time as least influential parameters. pH 8, Temperature 40 °C, aeration 200 RPM, time 3 days and concentration of sodium tungstate at 1 mM (p3t3r3d3c1) was the most effective level and parameters combination for smallest particle size and PDI of WO3 nanoparticles. Regression models developed for particle size and PDI exhibited a linear regression of 97.80% and 90.89% respectively, while the confirmation test validated the size and PDI of the experimental values against predicted results. SEM image of WO3 nanoparticles illustrated the same particle size as that predicted, further validating the model. The study can be applied to optimize any process parameters in the industry or on biological systems.
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MOREIRA ELIZANDRAR, OTTONI JÚLIAR, DE OLIVEIRA VALÉRIAM, PASSARINI MICHELRODRIGOZ. Potential for resistance to freezing by non-virulent bacteria isolated from Antarctica. AN ACAD BRAS CIENC 2022; 94:e20210459. [DOI: 10.1590/0001-3765202220210459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 10/08/2021] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - JÚLIA R. OTTONI
- Universidade Federal da Integração Latino-Americana (UNILA), Brazil
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Delavar MA, Wang J. Modeling coupled temperature and transport effects on biofilm growth using thermal lattice Boltzmann model. AIChE J 2021. [DOI: 10.1002/aic.17122] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Junye Wang
- Faculty of Science and Technology Athabasca University Athabasca Alberta Canada
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François DX, Godfroy A, Mathien C, Aubé J, Cathalot C, Lesongeur F, L'Haridon S, Philippon X, Roussel EG. Persephonella atlantica sp. nov.: How to adapt to physico-chemical gradients in high temperature hydrothermal habitats. Syst Appl Microbiol 2020; 44:126176. [PMID: 33422731 DOI: 10.1016/j.syapm.2020.126176] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/18/2020] [Accepted: 12/18/2020] [Indexed: 10/22/2022]
Abstract
A novel thermophilic, microaerophilic and anaerobic, hydrogen- sulphur- and thiosulphate-oxidising bacterium, designated MO1340T, was isolated from a deep-sea hydrothermal chimney collected from the Lucky Strike hydrothermal vent field on the Mid-Atlantic Ridge. Cells were short, motile rods of 1.4-2.2μm length and 0.5-0.8μm width. Optimal growth was observed for a NaCl concentration of 2.5 % (w/v) at pH 6.5. As for other members of the genus Persephonella, strain MO1340T was strictly chemolithoautotrophic and could oxidise hydrogen, elemental sulphur or thiosulphate using oxygen as electron acceptor. Anaerobic nitrate reduction using hydrogen could also be performed. Each catabolic reaction had a different optimal growth temperature (65 to 75°C) and an optimal dissolved oxygen concentration (11.4 to 119.7 μM at 70°C for aerobic reactions) that varied according to the electron donors utilised. These experimental results are consistent with the distribution of these catabolic substrates along the temperature gradient observed in active hydrothermal systems. They strongly suggest that this adaptive strategy could confer a selective advantage for strain MO1340T in the dynamic part of the ecosystem where hot, reduced hydrothermal fluid mixes with cold, oxygenated seawater. Phylogenetic analysis indicated that strain MO1340T was a member of the genus Persephonella within the order Hydrogenothermales as it shared a 16S rRNA gene sequence similarity <95.5 % and ANI respectively 75.66 % with closest described Persephonella (P. hydrogeniphila 29WT). On the basis of the physiological and genomic properties of the new isolate, the name Persephonella atlantica sp. nov. is proposed. The type strain is MO1340T (=UBOCC-M-3359T =JCM 34026T).
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Affiliation(s)
- David X François
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Anne Godfroy
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Clémentine Mathien
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Johanne Aubé
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Cécile Cathalot
- Ifremer, Laboratoire Cycle Géochimique et Ressources (LCG/GM/REM), F-29280, Plouzané, France
| | - Françoise Lesongeur
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Stéphane L'Haridon
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Xavier Philippon
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France
| | - Erwan G Roussel
- Univ Brest, Ifremer, CNRS, Laboratoire de Microbiologie des Environnements Extrêmes UMR6197, F-29280, Plouzané, France.
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Lueangwattanapong K, Ammam F, Mason PM, Whitehead C, McQueen-Mason SJ, Gomez LD, Smith JAC, Thompson IP. Anaerobic digestion of Crassulacean Acid Metabolism plants: Exploring alternative feedstocks for semi-arid lands. BIORESOURCE TECHNOLOGY 2020; 297:122262. [PMID: 31711909 DOI: 10.1016/j.biortech.2019.122262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/09/2019] [Accepted: 10/11/2019] [Indexed: 06/10/2023]
Abstract
In this work, five Crassulacean Acid Metabolism (CAM) species from the five different genera (Agave, Ananas, Euphorbia, Kalanchoe, and Opuntia) were selected as alternative feedstocks and their biochemical methane potentials (BMP) were investigated. Batch assays were performed using sludge and rumen fluid as inocula under uncontrolled pH and at mesophilic temperature (39 °C). Mean methane yields from the CAM plants inoculated with AD sludge ranged from 281 to 382 ml/gVS. These values were not significantly different from the methane yield obtained from maize, a feedstock for biomethane and volatile fatty acid (VFA), suggesting that CAM plants may be viable as bioenergy crops on poor-quality soils in areas with low rainfall that are unsuitable for cultivation of food crops.
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Affiliation(s)
| | - Fariza Ammam
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom
| | - P Michael Mason
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom
| | - Caragh Whitehead
- Department of Biology, Centre for Novel Agricultural Products, University of York, Wentworth Way, Heslington, York YO10 5DD, United Kingdom
| | - Simon J McQueen-Mason
- Department of Biology, Centre for Novel Agricultural Products, University of York, Wentworth Way, Heslington, York YO10 5DD, United Kingdom
| | - Leonardo D Gomez
- Department of Biology, Centre for Novel Agricultural Products, University of York, Wentworth Way, Heslington, York YO10 5DD, United Kingdom
| | - J Andrew C Smith
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3RB, United Kingdom
| | - Ian P Thompson
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom.
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Extremophilic exopolysaccharides: A review and new perspectives on engineering strategies and applications. Carbohydr Polym 2019; 205:8-26. [DOI: 10.1016/j.carbpol.2018.10.011] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/20/2018] [Accepted: 10/04/2018] [Indexed: 12/16/2022]
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Tian X, Wang C, Trzcinski AP, Lin L, Ng WJ. Interpreting the synergistic effect in combined ultrasonication-ozonation sewage sludge pre-treatment. CHEMOSPHERE 2015; 140:63-71. [PMID: 25282627 DOI: 10.1016/j.chemosphere.2014.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 08/19/2014] [Accepted: 09/02/2014] [Indexed: 06/03/2023]
Abstract
The sequential combination of ultrasonication and ozonation as sewage sludge treatment prior to anaerobic digestion was investigated. Synergistic volatile suspended solids (VSS) solubilization was observed when low energy ultrasonication (⩽12kJg(-1) TS) was followed by ozonation. 0.048gO3g(-1) TS ozonation induced the maximum VSS solubilization of 41.3% when the sludge was pre-ultrasonicated at 9kJg(-1) TS; while, the same ozone dosage applied without prior ultrasonication only induced 21.1% VSS solubilization. High molecular weight (MW) components (MW>500kDa) were found to be the main solubilization products when sludge was only ozonated. However, solubilization products by ozone were mainly in the form of low MW components (MW<27kDa) when sludge was pre-ultrasonicated. The high MW products generated by ultrasound were effectively degraded in the subsequent ozonation. Anaerobic biodegradability increased by 34.7% when ultrasonication (9kJg(-1) TS) and ozonation (0.036gO3g(-1) TS) were combined sequentially. The maximum methane production rate increased from 3.53 to 4.32, 4.21 and 4.54mL CH4d(-1) after ultrasonication, ozonation and ultrasonication-ozonation pre-treatments, respectively.
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Affiliation(s)
- Xinbo Tian
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Chong Wang
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Antoine Prandota Trzcinski
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore
| | - Leonard Lin
- Public Utilities Board, Water Reclamation (Plants) Department, 20 Pioneer Road, Singapore 628507, Singapore
| | - Wun Jern Ng
- Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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Jeong HH, Jeong SG, Park A, Jang SC, Hong SG, Lee CS. Effect of temperature on biofilm formation by Antarctic marine bacteria in a microfluidic device. Anal Biochem 2014; 446:90-5. [PMID: 24513116 DOI: 10.1016/j.ab.2013.10.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 09/25/2013] [Accepted: 10/17/2013] [Indexed: 12/12/2022]
Abstract
Polar biofilms have become an increasingly popular biological issue because new materials and phenotypes have been discovered in microorganisms in the polar region. Various environmental factors affect the functionality and adaptation of microorganisms. Because the polar region represents an extremely cold environment, polar microorganisms have a functionality different from that of normal microorganisms. Thus, determining the effective temperature for the development of polar biofilms is crucial. Here, we present a simple, novel one-pot assay for analysis of the effect of temperature on formation of Antarctic bacterial biofilm using a microfluidic system where continuous temperature gradients are generated. We find that a specific range of temperature is required for the growth of biofilms. Thus, this microfluidic approach provides precise information regarding the effective temperature for polar biofilm development with a new high-throughput screening format.
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Responses of unsaturated Pseudomonas putida CZ1 biofilms to environmental stresses in relation to the EPS composition and surface morphology. World J Microbiol Biotechnol 2014; 30:3081-90. [DOI: 10.1007/s11274-014-1735-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 08/31/2014] [Indexed: 10/24/2022]
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Aslam SN, Cresswell-Maynard T, Thomas DN, Underwood GJC. Production and Characterization of the Intra- and Extracellular Carbohydrates and Polymeric Substances (EPS) of Three Sea-Ice Diatom Species, and Evidence for a Cryoprotective Role for EPS. JOURNAL OF PHYCOLOGY 2012; 48:1494-509. [PMID: 27009999 DOI: 10.1111/jpy.12004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 05/09/2012] [Indexed: 05/15/2023]
Abstract
Diatoms and their associated extracellular polymeric substances (EPS) are major constituents of the microalgal assemblages present within sea ice. Yields and chemical composition of soluble and cell-associated polysaccharides produced by three sea-ice diatoms, Synedropsis sp., Fragilariopsis curta, and F. cylindrus, were compared. Colloidal carbohydrates (CC) contained heteropolysaccharides rich in mannose, xylose, galactose, and glucose. Synedropsis sp. CC consisted mainly of carbohydrates <8 kDa size, with relatively soluble EPS, compared to high proportions of less-soluble EPS produced by both Fragilariopsis spp. F. curta colloidal EPS contained high concentrations of amino sugars (AS). Both Fragilariopsis species had high yields of hot bicarbonate (HB) soluble EPS, rich in xylose, mannose, galactose, and fucose (and AS in F. cylindrus). All species had frustule-associated EPS rich in glucose-mannose. Nutrient limitation resulted in declines in EPS yields and in glucose content of all EPS fractions. Significant similarities between EPS fractions from cultures and different components of natural EPS from Antarctic sea ice were found. Increased salinity (52) reduced growth, but increased yields of EPS in Fragilariopsis cylindrus. Ice formation was inhibited byF. cylindrus, EPS, and by enhanced EPS content (additional xanthan gum) down to -12°C, with growth rate reduced in the presence of xanthan. Differences in the production and composition of EPS between Synedropsis sp. and Fragilariopsis spp., and the association between EPS, freezing and cell survival, supports the hypothesis that EPS production is a strategy to assist polar ice diatoms to survive the cold and saline conditions present in sea ice.
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Affiliation(s)
- Shazia N Aslam
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK
| | | | - David N Thomas
- Ocean Sciences, College of Natural Science, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK
- Finnish Environment Institute (SYKE), Marine Research Centre, P.O. Box 140, Helsinki, FI-00251, Finland
| | - Graham J C Underwood
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester, CO4 3SQ, UK
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Characterization of a novel antarctic plant growth-promoting bacterial strain and its interaction with antarctic hair grass (Deschampsia antarctica Desv). Polar Biol 2012. [DOI: 10.1007/s00300-012-1264-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Marx JG, Carpenter SD, Deming JW. Production of cryoprotectant extracellular polysaccharide substances (EPS) by the marine psychrophilic bacteriumColwellia psychrerythraeastrain 34H under extreme conditionsThis article is one of a selection of papers in the Special Issue on Polar and Alpine Microbiology. Can J Microbiol 2009; 55:63-72. [DOI: 10.1139/w08-130] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Extracellular polysaccharide substances (EPS) play critical roles in microbial ecology, including the colonization of extreme environments in the ocean, from sea ice to the deep sea. After first developing a sugar-free growth medium, we examined the relative effects of temperature, pressure, and salinity on EPS production (on a per cell basis) by the obligately marine and psychrophilic γ-proteobacterium, Colwellia psychrerythraea strain 34H. Over growth-permissive temperatures of ~10 to –4 °C, EPS production did not change, but from –8 to –14 °C when samples froze, EPS production rose dramatically. Similarly, at growth-permissive hydrostatic pressures of 1–200 atm (1 atm = 101.325 kPa) (at –1 and 8 °C), EPS production was unchanged, but at higher pressures of 400 and 600 atm EPS production rose markedly. In salinity tests at 10‰–100‰ (and –1 and 5 °C), EPS production increased at the freshest salinity tested. Extreme environmental conditions thus appear to stimulate EPS production by this strain. Furthermore, strain 34H recovered best from deep-freezing to –80 °C (not found for Earthly environments) if first supplemented with a preparation of its own EPS, rather than other cryoprotectants like glycerol, suggesting EPS production as both a survival strategy and source of compounds with potentially novel properties for biotechnological and other applications.
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Affiliation(s)
- Joseph G. Marx
- School of Oceanography, University of Washington, Seattle, WA 98195, USA
| | | | - Jody W. Deming
- School of Oceanography, University of Washington, Seattle, WA 98195, USA
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