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sulfate reducing bacteria

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https://www.readbyqxmd.com/read/28533768/novel-large-sulfur-bacteria-in-the-metagenomes-of-groundwater-fed-chemosynthetic-microbial-mats-in-the-lake-huron-basin
#1
Allison M Sharrar, Beverly E Flood, Jake V Bailey, Daniel S Jones, Bopaiah A Biddanda, Steven A Ruberg, Daniel N Marcus, Gregory J Dick
Little is known about large sulfur bacteria (LSB) that inhabit sulfidic groundwater seeps in large lakes. To examine how geochemically relevant microbial metabolisms are partitioned among community members, we conducted metagenomic analysis of a chemosynthetic microbial mat in the Isolated Sinkhole, which is in a deep, aphotic environment of Lake Huron. For comparison, we also analyzed a white mat in an artesian fountain that is fed by groundwater similar to Isolated Sinkhole, but that sits in shallow water and is exposed to sunlight...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28529500/co-existence-of-methanogenesis-and-sulfate-reduction-with-common-substrates-in-sulfate-rich-estuarine-sediments
#2
Michal Sela-Adler, Zeev Ronen, Barak Herut, Gilad Antler, Hanni Vigderovich, Werner Eckert, Orit Sivan
The competition between sulfate reducing bacteria and methanogens over common substrates has been proposed as a critical control for methane production. In this study, we examined the co-existence of methanogenesis and sulfate reduction with shared substrates over a large range of sulfate concentrations and rates of sulfate reduction in estuarine systems, where these processes are the key terminal sink for organic carbon. Incubation experiments were carried out with sediment samples from the sulfate-methane transition zone of the Yarqon (Israel) estuary with different substrates and inhibitors along a sulfate concentrations gradient from 1 to 10 mM...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28521206/decontamination-of-multiple-heavy-metals-containing-effluents-through-microbial-biotechnology
#3
Minxi Wu, Jingjing Liang, Jie Tang, Guang Li, Shiping Shan, Zhaohui Guo, Le Deng
To decontaminate heavy metal-containing waste water, a microbial biotechnology was developed by using the synergy between Sulfate reducing bacteria (SRB), Bacillus cereus (B. cereus) and Camellia oleifera cake (COC). In this process the COC degradation assisted by B.cereus, created an anoxic environment and provided energy and nutrition for SRB. Both of B. cereus and SRB played significant roles through biosorption, bioaccumulation and biosurfactant production. Meanwhile, a flotation technology commonly used in many effluent treatments has been led into this system for increasing the efficiency as well...
May 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28520899/increased-urinary-trimethylamine-n-oxide-tmao-following-cryptosporidium-infection-and-protein-malnutrition-independent-of-microbiome-effects
#4
D T Bolick, J Mayneris-Perxachs, G L Medlock, G L Kolling, J Papin, J R Swann, R L Guerrant
Cryptosporidium infections have been associated with growth stunting even in the absence of diarrhea. Having previously detailed the effects of protein deficiency on both microbiome and metabolome in this model, we now describe the specific gut microbial and biochemical effects of Cryptosporidium infection. Protein deficient mice were infected with Cryptosporidium parvum oocysts for 6-13 days and compared to uninfected controls. Following infection there was an increase in the urinary excretion of choline- and amino acid-derived metabolites...
May 17, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28520474/survival-of-deinococcus-geothermalis-in-biofilms-under-desiccation-and-simulated-space-and-martian-conditions
#5
Jan Frösler, Corinna Panitz, Jost Wingender, Hans-Curt Flemming, Petra Rettberg
Biofilm formation represents a successful survival strategy for bacteria. In biofilms, cells are embedded in a matrix of extracellular polymeric substances (EPS). As they are often more stress-tolerant than single cells, biofilm cells might survive the conditions present in space and on Mars. To investigate this topic, the bacterium Deinococcus geothermalis was chosen as a model organism due to its tolerance toward desiccation and radiation. Biofilms cultivated on membranes and, for comparison, planktonically grown cells deposited on membranes were air-dried and exposed to individual stressors that included prolonged desiccation, extreme temperatures, vacuum, simulated martian atmosphere, and UV irradiation, and they were exposed to combinations of stressors that simulate space (desiccation + vacuum + UV) or martian (desiccation + Mars atmosphere + UV) conditions...
May 2017: Astrobiology
https://www.readbyqxmd.com/read/28503173/microbial-community-response-to-simulated-petroleum-seepage-in-caspian-sea-sediments
#6
Marion H Stagars, Sonakshi Mishra, Tina Treude, Rudolf Amann, Katrin Knittel
Anaerobic microbial hydrocarbon degradation is a major biogeochemical process at marine seeps. Here we studied the response of the microbial community to petroleum seepage simulated for 190 days in a sediment core from the Caspian Sea using a sediment-oil-flow-through (SOFT) system. Untreated (without simulated petroleum seepage) and SOFT sediment microbial communities shared 43% bacterial genus-level 16S rRNA-based operational taxonomic units (OTU0.945) but shared only 23% archaeal OTU0.945. The community differed significantly between sediment layers...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28487680/diversity-of-metabolically-active-bacteria-in-water-flooded-high-temperature-heavy-oil-reservoir
#7
Tamara N Nazina, Natalya M Shestakova, Ekaterina M Semenova, Alena V Korshunova, Nadezda K Kostrukova, Tatiana P Tourova, Liu Min, Qingxian Feng, Andrey B Poltaraus
The goal of this work was to study the overall genomic diversity of microorganisms of the Dagang high-temperature oilfield (PRC) and to characterize the metabolically active fraction of these populations. At this water-flooded oilfield, the microbial community of formation water from the near-bottom zone of an injection well where the most active microbial processes of oil degradation occur was investigated using molecular, cultural, radiotracer, and physicochemical techniques. The samples of microbial DNA and RNA from back-flushed water were used to obtain the clone libraries for the 16S rRNA gene and cDNA of 16S rRNA, respectively...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28484799/distribution-of-anaerobic-hydrocarbon-degrading-bacteria-in-soils-from-king-george-island-maritime-antarctica
#8
Dayanna Souza Sampaio, Juliana Rodrigues Barboza Almeida, Hugo E de Jesus, Alexandre S Rosado, Lucy Seldin, Diogo Jurelevicius
Anaerobic diesel fuel Arctic (DFA) degradation has already been demonstrated in Antarctic soils. However, studies comparing the distribution of anaerobic bacterial groups and of anaerobic hydrocarbon-degrading bacteria in Antarctic soils containing different concentrations of DFA are scarce. In this study, functional genes were used to study the diversity and distribution of anaerobic hydrocarbon-degrading bacteria (bamA, assA, and bssA) and of sulfate-reducing bacteria (SRB-apsR) in highly, intermediate, and non-DFA-contaminated soils collected during the summers of 2009, 2010, and 2011 from King George Island, Antarctica...
May 8, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28482103/prevention-of-escherichia-coli-infection-in-broiler-chickens-with-lactobacillus-plantarum-b1
#9
S Wang, Q Peng, H M Jia, X F Zeng, J L Zhu, C L Hou, X T Liu, F J Yang, S Y Qiao
Two studies were performed to assess the efficacy of Lactobacillus plantarum B1 in prevention of pathogenic Escherichia coli K88 gastrointestinal infection in broilers. In an in vitro study, L. plantarum B1 showed resistance to acid and bile and inhibited the growth of E. coli K88. Additionally, L. plantarum B1 exhibited high ability to adhere to broiler embryo ileal epithelium. In an animal trial, 240 broilers at 1 d of age were randomly assigned to one of 4 treatment arms: negative control (NC) broilers fed a basal diet and not challenged; positive control (PC) broilers fed a basal diet and challenged with E...
May 6, 2017: Poultry Science
https://www.readbyqxmd.com/read/28475991/effect-of-co-substrates-on-biogas-production-and-anaerobic-decomposition-of-pentachlorophenol
#10
Mohammad Danish Khan, Nishat Khan, Abdul-Sattar Nizami, Mohammad Rehan, Suhail Sabir, Mohammad Zain Khan
This study aims to examine the effect of different co-substrates on the anaerobic degradation of pentachlorophenol (PCP) with simultaneous production of biogas. Acetate and glucose were added as co-substrates to monitor and compare the methanogenic reaction during PCP degradation. During the experiment, a chemical oxygen demand (COD) removal efficiency of 80% was achieved. Methane (CH4) production was higher in glucose-fed anaerobic reactors with the highest amount of CH4 (303.3µL) produced at 200ppm of PCP...
April 25, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28469616/guar-gum-stimulates-biogenic-sulfide-production-at-elevated-pressures-implications-for-shale-gas-extraction
#11
Sophie L Nixon, Leanne Walker, Matthew D T Streets, Bob Eden, Christopher Boothman, Kevin G Taylor, Jonathan R Lloyd
Biogenic sulfide production is a common problem in the oil industry, and can lead to costly hydrocarbon processing and corrosion of extraction infrastructure. The same phenomenon has recently been identified in shale gas extraction by hydraulic fracturing, and organic additives in fracturing fluid have been hypothesized to stimulate this process. Constraining the relative effects of the numerous organic additives on microbial metabolism in situ is, however, extremely challenging. Using a bespoke bioreactor system we sought to assess the potential for guar gum, the most commonly used gelling agent in fracturing fluids, to stimulate biogenic sulfide production by sulfate-reducing microorganisms at elevated pressure...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28464847/glycosaminoglycans-are-involved-in-bacterial-adherence-to-lung-cells
#12
Olga Rajas, Luis M Quirós, Mara Ortega, Emma Vazquez-Espinosa, Jesús Merayo-Lloves, Fernando Vazquez, Beatriz García
BACKGROUND: Lower respiratory infections are among the top ten causes of death worldwide. Since pathogen to cell adhesion is a crucial step in the infection progress, blocking the interaction between eukaryotic receptors and bacterial ligands may enable the pathogenesis process to be stopped. Cell surface glycosaminoglycans (GAGs) are known to be mediators in the adhesion of diverse bacteria to different cell types, making it of interest to examine their involvement in the attachment of various pathogenic bacteria to lung cells, including epithelial cells and fibroblasts...
May 2, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28458201/reduction-of-adsorbed-as-v-on-nano-tio2-by-sulfate-reducing-bacteria
#13
Ting Luo, Li Ye, Cheng Ding, Jinlong Yan, Chuanyong Jing
Reduction of surface-bound arsenate [As(V)] and subsequent release into the aqueous phase contribute to elevated As in groundwater. However, this natural process is not fully understood, especially in the presence of sulfate-reducing bacteria (SRB). Gaining mechanistic insights into solid-As(V)-SRB interactions motivated our molecular level study on the fate of nano-TiO2 bound As(V) in the presence of Desulfovibrio vulgaris DP4, a strain of SRB, using incubation and in situ ATR-FTIR experiments. The incubation results clearly revealed the reduction of As(V), either adsorbed on nano-TiO2 or dissolved, in the presence of SRB...
April 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28445245/ectopic-expression-of-innate-immune-protein-lipocalin-2-in-lactococcus-lactis-protects-against-gut-and-environmental-stressors
#14
Piu Saha, Benoit Chassaing, Beng San Yeoh, Emilie Viennois, Xia Xiao, Mary J Kennett, Vishal Singh, Matam Vijay-Kumar
BACKGROUND: Lipocalin-2 (Lcn2) is a multifunctional innate immune protein that exhibits antimicrobial activity by the sequestration of bacterial siderophores, regulates iron homeostasis, and augments cellular tolerance to oxidative stress. Studies in the murine model of colitis have demonstrated that Lcn2 deficiency exacerbates colitogenesis; however, the therapeutic potential of Lcn2 supplementation has yet to be elucidated. In light of its potential mucoprotective functions, we, herein, investigated whether expression of Lcn2 in the probiotic bacterium can be exploited to alleviate experimental colitis...
April 25, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28444419/the-role-of-localized-acidity-generation-in-microbially-influenced-corrosion
#15
REVIEW
Yuriy Kryachko, Sean M Hemmingsen
Microbially influenced corrosion is of great industrial concern. Microbial coupling of metal oxidation to sulfate-, nitrate-, nitrite-, or CO2-reduction is proton-mediated, and some sulfate-reducing prokaryotes are capable of regulating extracellular pH. The analysis of the corrosive processes catalyzed by nitrate reducing bacteria and methanogenic archaea indicates that these microorganisms may be capable of regulating extracellular pH as well. It is proposed that nutrient limitation at metal-biofilm interfaces may induce activation of enzymatic proton-producing/proton-secreting functions in respiratory and methanogenic microorganisms to make them capable of using Fe(0) as the electron donor...
April 26, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28433879/sulfamethoxazole-degradation-in-anaerobic-sulfate-reducing-bacteria-sludge-system
#16
Yanyan Jia, Samir Kumar Khanal, Huiqun Zhang, Guang-Hao Chen, Hui Lu
Sulfamethoxazole (SMX) is one of the most commonly used antibiotics. SMX degradation in sulfate-reducing bacteria (SRB) sludge systems has not been reported so far. This research investigated the SMX degradation using SRB sludge in a sulfate-reducing up-flow sludge bed reactor. Moreover, the mechanisms and kinetics of SMX removal were also investigated using SRB sludge via a series of batch experiments. The results showed that SMX removal was characterized by a rapid sorption onto SRB sludge, and desorption from SRB sludge to aqueous phase until achieving equilibrium, and then followed by slow biodegradation...
April 17, 2017: Water Research
https://www.readbyqxmd.com/read/28432623/performance-of-cstr-egsb-sbr-system-for-treating-sulfate-rich-cellulosic-ethanol-wastewater-and-microbial-community-analysis
#17
Lili Shan, Zhaohan Zhang, Yanling Yu, John Justo Ambuchi, Yujie Feng
Performance and microbial community composition were evaluated in a two-phase anaerobic and aerobic system treating sulfate-rich cellulosic ethanol wastewater (CEW). The system was operated at five different chemical oxygen demand (COD)/SO4(2-) ratios (63.8, 26.3, 17.8, 13.7, and 10.7). Stable performance was obtained for total COD removal efficiency (94.5%), sulfate removal (89.3%), and methane production rate (11.5 L/day) at an organic loading rate of 32.4 kg COD/(m(3)·day). The acidogenic reactor made a positive contribution to net VFAs production (2318...
April 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28422054/growth-inhibition-of-sulfate-reducing-bacteria-in-produced-water-from-the-petroleum-industry-using-essential-oils
#18
Pamella Macedo de Souza, Fátima Regina de Vasconcelos Goulart, Joana Montezano Marques, Humberto Ribeiro Bizzo, Arie Fitzgerald Blank, Claudia Groposo, Maíra Paula de Sousa, Vanessa Vólaro, Celuta Sales Alviano, Daniela Sales Alviano Moreno, Lucy Seldin
Strategies for the control of sulfate-reducing bacteria (SRB) in the oil industry involve the use of high concentrations of biocides, but these may induce bacterial resistance and/or be harmful to public health and the environment. Essential oils (EO) produced by plants inhibit the growth of different microorganisms and are a possible alternative for controlling SRB. We aimed to characterize the bacterial community of produced water obtained from a Brazilian petroleum facility using molecular methods, as well as to evaluate the antimicrobial activity of EO from different plants and their major components against Desulfovibrio alaskensis NCIMB 13491 and against SRB growth directly in the produced water...
April 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28401391/temporal-abundance-and-activity-trends-of-vinyl-chloride-vc-degrading-bacteria-in-a-dilute-vc-plume-at-naval-air-station-oceana
#19
Yi Liang, Laura J Cook, Timothy E Mattes
Assessment and monitoring of microbial community dynamics is useful when tracking the progress of vinyl chloride (VC) bioremediation strategies, particularly in dilute plumes where apparent VC attenuation rates are low. In a long-term field study, the abundance and the activity of microbial VC degraders were tracked in three monitoring wells (MW05, MW25, and MW19) along a dilute VC plume at Naval Air Station (NAS) Oceana. High-throughput sequencing of partial 16S ribosomal RNA (rRNA) genes and transcripts revealed diverse groundwater microbial communities and showed that methanotrophs and anaerobic respirers (e...
April 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28399481/chlorinated-phenol-treatment-and-in-situ-hydrogen-peroxide-production-in-a-sulfate-reducing-bacteria-enriched-bioelectrochemical-system
#20
Waheed Miran, Mohsin Nawaz, Jiseon Jang, Dae Sung Lee
Wastewaters are increasingly being considered as renewable resources for the sustainable production of electricity, fuels, and chemicals. In recent years, bioelectrochemical treatment has come to light as a prospective technology for the production of energy from wastewaters. In this study, a bioelectrochemical system (BES) enriched with sulfate-reducing bacteria (SRB) in the anodic chamber was proposed and evaluated for the biodegradation of recalcitrant chlorinated phenol, electricity generation (in the microbial fuel cell (MFC)), and production of hydrogen peroxide (H2O2) (in the microbial electrolysis cell (MEC)), which is a very strong oxidizing agent and often used for the degradation of complex organics...
June 15, 2017: Water Research
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