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https://www.readbyqxmd.com/read/28231272/vibrio-japonicus-sp-nov-a-novel-member-of-the-nereis-clade-in-the-genus-vibrio-isolated-from-the-coast-of-japan
#1
Hiroyasu Doi, Ikuko Osawa, Hayamitsu Adachi, Manabu Kawada
A novel Vibrio strain, JCM 31412T, was isolated from seawater collected from the Inland Sea (Setonaikai), Japan, and characterized as a Gram-negative, oxidase-positive, catalase-negative, facultatively anaerobic, motile, ovoid-shaped bacterium with one polar flagellum. Based on 16S rDNA gene identity, strain JCM 31412T showed a close relationship with type strains of Vibrio brasiliensis (LMG 20546T, 98.2% identity), V. harveyi (NBRC 15634T, 98.2%), V. caribbeanicus (ATCC BAA-2122T, 97.8%) and V. proteolyticus (NBRC 13287T, 97...
2017: PloS One
https://www.readbyqxmd.com/read/28230207/enhanced-fenton-like-degradation-of-trichloroethylene-by-hydrogen-peroxide-activated-with-nanoscale-zero-valent-iron-loaded-on-biochar
#2
Jingchun Yan, Linbo Qian, Weiguo Gao, Yun Chen, Da Ouyang, Mengfang Chen
Composite of nanoscale Zero Valent Iron (nZVI) loaded on Biochar (BC) was prepared and characterized as hydrogen peroxide (H2O2) activator for the degradation of trichloroethylene (TCE). nZVI is homogeneously loaded on lamellarly structured BC surfaces to form nZVI/BC with specific surface area (SBET) of 184.91 m(2) g(-1), which can efficiently activate H2O2 to achieve TCE degradation efficiency of 98.9% with TOC removal of 78.2% within 30 min under the conditions of 0.10 mmol L(-1) TCE, 1.13 g L(-1) nZVI/BC and 1...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229575/effects-of-a-low-volume-plyometric-training-in-anaerobic-performance-of-adolescent-athletes
#3
Ari R Assunção, Martim Bottaro, Euler A Cardoso, Daiane P Dantas da Silva, Marcelo Ferraz, Carlos A Vieira, Paulo Gentil
BACKGROUND: Parameters related to the anaerobic capacity and power may be important for the performance of many sports whose skills are related to high-intensity and short- duration efforts. Although plyometric training (PT) has been widely used in the regular strength and conditioning programs of young athletes, its effects on anaerobic performance are still controversial. Therefore, the purpose of the present study was to evaluate the effects of PT in anaerobic performance in young athletes...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28229521/microbial-potential-for-carbon-and-nutrient-cycling-in-a-geogenic-supercritical-carbon-dioxide-reservoir
#4
Adam J E Freedman, BoonFei Tan, Janelle R Thompson
Microorganisms catalyze carbon cycling and biogeochemical reactions in the deep subsurface and thus may be expected to influence the fate of injected supercritical (sc) CO2 following geological carbon sequestration (GCS). We hypothesized that natural subsurface scCO2 reservoirs, which serve as analogs for the long-term fate of sequestered scCO2 , harbor a "deep carbonated biosphere" with carbon cycling potential. We sampled subsurface fluids from scCO2 -water separators at a natural scCO2 reservoir at McElmo Dome, Colorado for analysis of 16S rRNA gene diversity and metagenome content...
February 22, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28229332/the-role-of-riboflavin-in-decolourisation-of-congo-red-and-bioelectricity-production-using-shewanella-oneidensis-mr1-under-mfc-and-non-mfc-conditions
#5
Ola M Gomaa, Segun Fapetu, Godfrey Kyazze, Tajalli Keshavarz
Dissimilatory metal reducing bacteria can exchange electrons extracellularly and hold great promise for their use in simultaneous wastewater treatment and electricity production. This study investigated the role of riboflavin, an electron carrier, in the decolourisation of Congo red in microbial fuel cells (MFCs) using Shewanella oneidensis MR-1 as a model organism. The contribution of the membrane-bound protein MtrC to the decolourisation process was also investigated. Within the range of riboflavin concentrations tested, 20 µM was found to be the best with >95% of the dye (initial concentration 200 mg/L) decolourised in MFCs within 50 h compared to 90% in the case where no riboflavin was added...
March 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28229216/enhanced-biotransformation-of-triclocarban-by-ochrobactrum-sp-tcc-1-under-anoxic-nitrate-respiration-conditions
#6
Hui Yun, Bin Liang, Deyong Kong, Zhiling Li, Guoshu Qi, Aijie Wang
Antimicrobial triclocarban (3,4,4'-trichlorocarbanilide, TCC) is frequently detected in soils and sediments for the widely reclaim of sewage sludge or biosolid in recent decades. This resulted from a weak removal of TCC during wastewater treatment, and most of it adsorbed onto sewage sludge. As the toxicity and persistence of TCC in the environment, the elimination of TCC from the source of output is of great importance, particularly in anoxic process. In this study, the biotransformation of TCC by a newly isolated TCC-degrading strain Ochrobactrum sp...
February 22, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28228396/case-of-a-cerebral-abscess-caused-by-porphyromonas-gingivalis-in-a-subject-with-periodontitis
#7
Frederic Van der Cruyssen, Koenraad Grisar, Honorine Maes, Constantinus Politis
We report the case of a 65-year-old man presenting with generalised seizures after developing a right frontal brain abscess. Stereotactic aspiration and subsequent matrix assisted laser desorption/ionisation time-of-flight analyzer (MALDI-TOF) spectrometry revealed Porphyromonas gingivalis as the only causative anaerobe microorganism. Secondary incision and drainage was required due to neurological deterioration with increased dimensions of the abscess, intracranial pressure and formation of a subdural occipitoparietal empyema...
February 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28228359/influence-of-process-parameters-on-the-extraction-of-soluble-substances-from-ofmsw-and-methane-production
#8
Rosalinda Campuzano, Simón González-Martínez
Microorganisms involved in anaerobic digestion require dissolved substrates to transport them through the cell wall to different processing units and finally to be disposed as waste, such as methane and carbon dioxide. In order to increase methane production, this work proposes to separate the soluble substances from OFMSW and analyse methane production from extracts and OFMSW. Using water as solvent, four extraction parameters were proposed: (1) Number of consecutive extractions, (2) Duration of mixing for every consecutive extraction, (3) OFMSW to water mass ratios 1:1, 1:2, and 1:3 and, (4) The influence of temperature on the extraction process...
February 19, 2017: Waste Management
https://www.readbyqxmd.com/read/28228327/enhancing-biomethanogenic-treatment-of-fresh-incineration-leachate-using-single-chambered-microbial-electrolysis-cells
#9
REVIEW
Yan Gao, Dezhi Sun, Yan Dang, Yuqing Lei, Jiayang Ji, Tingwei Lv, Rui Bian, Zhihui Xiao, Liangming Yan, Dawn E Holmes
Methanogenic treatment of municipal solid waste (MSW) incineration leachate can be hindered by high concentrations of refractory organic matter and humification of compounds in the leachate. In an attempt to overcome some of these impediments, microbial electrolysis cells (MECs) were incorporated into anaerobic digesters (ADMECs). COD removal efficiencies and methane production were 8.7% and 44.3% higher in ADMECs than in controls, and ADMEC reactors recovered more readily from souring caused by high organic loading rates...
February 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28228239/spatial-distribution-and-removal-performance-of-pharmaceuticals-in-municipal-wastewater-treatment-plants-in-china
#10
Hou-Qi Liu, James C W Lam, Wen-Wei Li, Han-Qing Yu, Paul K S Lam
Municipal wastewater treatment plants (WWTPs) are an important source of pharmaceuticals released into the environment. Understanding how various pharmaceuticals are distributed and handled in WWTPs is a prerequisite to optimize their abatement. Here we investigated the spatial distribution and removal efficiencies pharmaceuticals in China's WWTPs. A total of 35 pharmaceuticals in wastewater samples from 12 WWTPs at different cities of China were analyzed. Among these detected pharmaceuticals, caffeine showed the highest concentration (up to 1775...
February 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28228237/groundwater-nitrate-reduction-versus-dissolved-gas-production-a-tale-of-two-catchments
#11
E B McAleer, C E Coxon, K G Richards, M M R Jahangir, J Grant, Per E Mellander
At the catchment scale, a complex mosaic of environmental, hydrogeological and physicochemical characteristics combine to regulate the distribution of groundwater and stream nitrate (NO3(-)). The efficiency of NO3(-) removal (via denitrification) versus the ratio of accumulated reaction products, dinitrogen (excess N2) & nitrous oxide (N2O), remains poorly understood. Groundwater was investigated in two well drained agricultural catchments (10km(2)) in Ireland with contrasting subsurface lithologies (sandstone vs...
February 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28225763/elucidation-of-the-biosynthesis-of-the-methane-catalyst-coenzyme-f430
#12
Simon J Moore, Sven T Sowa, Christopher Schuchardt, Evelyne Deery, Andrew D Lawrence, José Vazquez Ramos, Susan Billig, Claudia Birkemeyer, Peter T Chivers, Mark J Howard, Stephen E J Rigby, Gunhild Layer, Martin J Warren
Methane biogenesis in methanogens is mediated by methyl-coenzyme M reductase, an enzyme that is also responsible for the utilization of methane through anaerobic methane oxidation. The enzyme uses an ancillary factor called coenzyme F430, a nickel-containing modified tetrapyrrole that promotes catalysis through a methyl radical/Ni(ii)-thiolate intermediate. However, it is unclear how coenzyme F430 is synthesized from the common primogenitor uroporphyrinogen iii, incorporating 11 steric centres into the macrocycle, although the pathway must involve chelation, amidation, macrocyclic ring reduction, lactamization and carbocyclic ring formation...
February 22, 2017: Nature
https://www.readbyqxmd.com/read/28225489/immunoregulation-effects-of-different-%C3%AE-%C3%AE-t-cells-and-toll-like-receptor-signaling-pathways-in-neonatal-necrotizing-enterocolitis
#13
Lei Hui, Yi Dai, Zhi Guo, Jiahui Zhang, Fang Zheng, Xiangli Bian, Zhimin Wu, Qin Jiang, Miaomiao Guo, Ke Ma, Jinping Zhang
The aim of the study was to observe cytokine and T-cell-related toll-like-receptor (TLR) changes in intestinal samples of neonatal necrotizing enterocolitis patients.Four necrotic bowels were collected from neonatal NEC patients with gestational ages of 28 to 29 weeks in our hospital, whereas 4 neonatal patients who underwent intestinal atresia surgery served as the controls. Intestinal flora was examined and IL-1, IL-2, IL-4, IL-6, IL-8, IL-10, TNF-α, IFN-γ, and IL-17 expressions in resected intestine samples, as well as in isolated gamma delta T (γδT) cells, were analyzed immunohistochemically and via quantitative RT-PCR...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28225252/luminescent-re-i-carbonyl-complexes-as-trackable-photocorms-for-co-delivery-to-cellular-targets
#14
Indranil Chakraborty, Jorge Jimenez, W M C Sameera, Masako Kato, Pradip K Mascharak
A family of Re(I) carbonyl complexes of general formula [ReX(CO)3(phen)](0/1+) (where X = Cl(-), CF3SO3(-), MeCN, PPh3, and methylimidazole) derived from 1,10-phenanthroline (phen) exhibits variable emission characteristics depending on the presence of the sixth ancillary ligand/group (X). All complexes but with X = MeCN exhibit moderate CO release upon irradiation with low-power UV light and are indefinitely stable in anaerobic/aerobic environment in solution as well as in solid state when kept under dark condition...
February 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28224653/air-sacculitis-in-three-rhesus-macaques-macaca-mulatta-and-one-japanese-macaque-m-%C3%A2-fuscata
#15
Cassandra O Cullin, Lois M A Colgin, Anne D Lewis
Bacterial infection of the laryngeal air sacs (air sacculitis) is infrequently reported in nonhuman primates, where it leads to chronic respiratory disease. It is particularly uncommon in macaques; however, we report here suppurative air sacculitis with extension to adjacent cervical tissues in three rhesus macaques and one Japanese macaque. Staphylococcus aureus, Streptococcus sp., and an anaerobic bacterium were isolated.
February 22, 2017: Journal of Medical Primatology
https://www.readbyqxmd.com/read/28224117/perc-manipulates-metabolism-and-surface-antigens-in-enteropathogenic-escherichia-coli
#16
Jay L Mellies, Amy Platenkamp, Jossef Osborn, Lily Ben-Avi
Enteropathogenic Escherichia coli is an important cause of profuse, watery diarrhea in infants living in developing regions of the world. Typical strains of EPEC (tEPEC) possess a virulence plasmid, while related clinical isolates that lack the pEAF plasmid are termed atypical EPEC (aEPEC). tEPEC and aEPEC tend to cause acute vs. more chronic type infections, respectively. The pEAF plasmid encodes an attachment factor as well as a regulatory operon, perABC. PerC, a poorly understood regulator, was previously shown to regulate expression of the type III secretion system through Ler...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28224040/massilioclostridium-coli-gen-nov-sp-nov-a-new-member-of-the-clostridiaceae-family-isolated-from-the-left-colon-of-a-27-year-old-woman
#17
C I Lo, M Mailhe, D Ricaboni, V Vitton, A Benezech, C Michelle, N Armstrong, F Bittar, P-E Fournier, D Raoult, J-C Lagier
Massilioclostridium coli strain Marseille-P2976(T) (= CSUR P2976 = DSM 103344) is a new bacterial genus isolated from the left colon of a patient who underwent colonoscopy for colorectal cancer screening. Massilioclostridium coli is a Gram-negative bacillus, strict anaerobic, nonsporogenous and nonmotile organism. We describe here the strain Marseille-P2976(T) and provide its complete annotated genome sequence according to taxonogenomics concepts. Its genome is 2 985 330 bp long and contains 2562 predicted genes and 75 RNA genes...
March 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28223460/mechanism-of-h2s-oxidation-by-the-dissimilatory-perchlorate-reducing-microorganism-azospira-suillum-ps
#18
Misha G Mehta-Kolte, Dana Loutey, Ouwei Wang, Matthew D Youngblut, Christopher G Hubbard, Kelly M Wetmore, Mark E Conrad, John D Coates
The genetic and biochemical basis of perchlorate-dependent H2S oxidation (PSOX) was investigated in the dissimilatory perchlorate-reducing microorganism (DPRM) Azospira suillum PS (PS). Previously, it was shown that all known DPRMs innately oxidize H2S, producing elemental sulfur (S(o)). Although the process involving PSOX is thermodynamically favorable (ΔG°' = -206 kJ ⋅ mol(-1) H2S), the underlying biochemical and genetic mechanisms are currently unknown. Interestingly, H2S is preferentially utilized over physiological electron donors such as lactate or acetate although no growth benefit is obtained from the metabolism...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28223393/novel-bacterial-topoisomerase-inhibitors-with-potent-broad-spectrum-activity-against-drug-resistant-bacteria
#19
Cédric Charrier, Anne-Marie Salisbury, Victoria J Savage, Thomas Duffy, Emmanuel Moyo, Nathan Chaffer-Malam, Nicola Ooi, Rebecca Newman, Jonathan Cheung, Richard Metzger, David McGarry, Mark Pichowicz, Ralph Sigerson, Ian R Cooper, Gary Nelson, Hayley S Butler, Mark Craighead, Andrew J Ratcliffe, Stuart A Best, Neil R Stokes
The Novel Bacterial Topoisomerase Inhibitor class is an investigational type of antibacterial inhibitor of DNA gyrase and topoisomerase IV that do not have cross-resistance with the quinolones. Here, we report the evaluation of the in vitro properties of a new series of this type of small molecules. Exemplar compounds selectively and potently inhibited the catalytic activities of Escherichia coli DNA gyrase and topoisomerase IV but did not block the DNA breakage-reunion step. Compounds showed broad-spectrum inhibitory activity against a wide range of Gram-positive and Gram-negative pathogens, including biodefence microorganisms, and Mycobacterium tuberculosis No cross-resistance with quinolone-resistant Staphylococcus aureus and E...
February 21, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28223348/immunoactive-clostridial-membrane-vesicle-production-is-regulated-by-a-sporulation-factor
#20
Nozomu Obana, Ryoma Nakao, Kyoko Nagayama, Kouji Nakamura, Hidenobu Senpuku, Nobuhiko Nomura
Recently, many Gram-positive bacteria as well as gram-negative bacteria have been reported to produce MVs, but little is known regarding the regulators involved in MV formation. We found that a Gram-positive anaerobic pathogen, Clostridium perfringens, produces MVs predominantly containing membrane proteins and cell wall components. These MVs stimulated pro-inflammatory cytokine production in mouse macrophage-like cells. We suggested that MVs induced IL-6 production through the TLR2 signaling pathway. Thus, the MV could have a role in the bacteria-host interaction and bacterial infection pathogenesis...
February 21, 2017: Infection and Immunity
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