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"Nitrate"

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https://www.readbyqxmd.com/read/27911255/euzebyella-marina-sp-nov-isolated-from-seawater
#1
Yan-Jiao Zhang, Jia-Rui Zhao, Xi-Ying Zhang, Guo-Zhong Chen, Ming-Yang Zhou, Xu-Hua Mo, Hai-Lun He, Shiyong Chen
A Gram-negative, aerobic, yellow-pigmented, non-flagellated, non-gliding, oxidase- and catalase- positive bacterium, designated CY01T, was isolated from seawater of the Yellow Sea. Strain CY01T grew at 15-37 C (optimum, 30 C), at pH 5-8 (optimum, 6.5-7.5) and with 0.5-12 % (w/v) NaCl (optimum, 0.5-3.5 %). It could not produce flexirubin-type pigment or reduce nitrate to nitrite. Strain CY01T showed the highest 16S rRNA gene sequence similarity to type strain of Euzebyella saccharophila (97.0 %) and clustered tightly with the Euzebyella species in the phylogenetic trees based on the 16S rRNA gene sequences...
December 1, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27910842/comparison-of-hydrogen-bonds-and-diverse-weak-interactions-of-the-nitro-group-in-2-methyl-4-nitroanilinium-nitrate-bisulfate-and-two-hexafluoridosilicates-elementary-graph-set-approach
#2
Marek Daszkiewicz, Agnieszka Mielcarek
Crystal structures of (H2m4na)NO3 (1), (H2m4na)HSO4 (2), (H2m4na)2SiF6 (3) and (H2m4na)2SiF6·2H2O (4), where 2m4na = 2-methyl-4-nitroaniline, are presented. Two layers of interactions occur in the structures, N-H...O/F hydrogen bonds and interactions with the nitro group. Although diverse, hydrogen-bonding patterns are compared with each other by means of interrelations among elementary graph-set descriptors and descriptors of hydrogen-bonding patterns. Using mathematical relations, the gradual expansion of the ring patterns was shown in the crystal structures...
December 1, 2016: Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials
https://www.readbyqxmd.com/read/27909784/statement-of-concern-re-the-effects-of-organic-nitrates-on-osteoporosis-a-systematic-review
#3
S A Jamal, L S Reid, C J Hamilton
No abstract text is available yet for this article.
December 1, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27909783/retraction-to-nitrate-use-and-changes-in-bone-mineral-density-the-canadian-multicentre-osteoporosis-study
#4
S A Jamal, D Goltzman, D A Hanley, A Papaioannou, J C Prior, R G Josse
No abstract text is available yet for this article.
December 1, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27909733/nitrogen-gas-plasma-treatment-of-bacterial-spores-induces-oxidative-stress-that-damages-the-genomic-dna
#5
Akikazu Sakudo, Yoichi Toyokawa, Tetsuji Nakamura, Yoshihito Yagyu, Yuichiro Imanishi
Gas plasma, produced by a short high‑voltage pulse generated from a static induction thyristor power supply [1.5 kilo pulse/sec (kpps)], was demonstrated to inactivate Geobacillus stearothermophilus spores (decimal reduction time at 15 min, 2.48 min). Quantitative polymerase chain reaction and enzyme‑linked immunosorbent assays further indicated that nitrogen gas plasma treatment for 15 min decreased the level of intact genomic DNA and increased the level of 8-hydroxy-2'-deoxyguanosine, a major product of DNA oxidation...
November 29, 2016: Molecular Medicine Reports
https://www.readbyqxmd.com/read/27909430/bacterial-active-community-cycling-in-response-to-solar-radiation-and-their-influence-on-nutrient-changes-in-a-high-altitude-wetland
#6
Verónica Molina, Klaudia Hernández, Cristina Dorador, Yoanna Eissler, Martha Hengst, Vilma Pérez, Chris Harrod
Microbial communities inhabiting high-altitude spring ecosystems are subjected to extreme changes in solar irradiance and temperature throughout the diel cycle. Here, using 16S rRNA gene tag pyrosequencing (cDNA) we determined the composition of actively transcribing bacteria from spring waters experimentally exposed through the day (morning, noon, and afternoon) to variable levels of solar radiation and light quality, and evaluated their influence on nutrient recycling. Solar irradiance, temperature, and changes in nutrient dynamics were associated with changes in the active bacterial community structure, predominantly by Cyanobacteria, Verrucomicrobia, Proteobacteria, and 35 other Phyla, including the recently described Candidate Phyla Radiation (e...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27909231/influence-of-dietary-nitrate-supplementation-on-physiological-and-muscle-metabolic-adaptations-to-sprint-interval-training
#7
Christopher Thompson, Lee J Wylie, Jamie R Blackwell, Jonathan Fulford, Matthew I Black, James Kelly, Sinead T J McDonagh, James Carter, Stephen J Bailey, Anni Vanhatalo, Andrew M Jones
We hypothesized that 4 weeks of dietary nitrate supplementation would enhance exercise performance and muscle metabolic adaptations to sprint interval training (SIT). Thirty six recreationally-active subjects, matched on key variables at baseline, completed a series of exercise tests before and following a 4 week period in which they were allocated to one of the following groups: 1) SIT and NO3(-)-depleted beetroot juice as a placebo (SIT+PL); 2) SIT and NO3(-)-rich beetroot juice (~13mmol NO3(-)/day; SIT+BR); or 3) no training and NO3(-)-rich beetroot juice (NT+BR)...
December 1, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27908452/kinetics-and-mechanisms-of-nitrate-and-ammonium-formation-during-ozonation-of-dissolved-organic-nitrogen
#8
Glen Andrew de Vera, Wolfgang Gernjak, Howard Weinberg, Maria José Farré, Jurg Keller, Urs von Gunten
Dissolved organic nitrogen (DON) is an emerging concern in oxidative water treatment because it exerts oxidant demand and may form nitrogenous oxidation/disinfection by-products. In this study, we investigated the reactions of ozone with DON with a special emphasis on the formation of nitrate (NO3(-)) and ammonium (NH4(+)). In batch ozonation experiments, the formation of NO3(-) and NH4(+) was investigated for natural organic matter standards, surface water, and wastewater effluent samples. A good correlation was found between NO3(-) formation and the O3 exposure (R(2) > 0...
October 8, 2016: Water Research
https://www.readbyqxmd.com/read/27908107/can-dispersion-corrections-annihilate-the-dispersion-driven-nano-aggregation-of-non-polar-groups-an-ab-initio-molecular-dynamics-study-of-ionic-liquid-systems
#9
Dzmitry S Firaha, Martin Thomas, Oldamur Hollóczki, Martin Korth, Barbara Kirchner
In this study, we aim at understanding the influence of dispersion correction on the ab initio molecular dynamics simulations of ionic liquid (IL) systems. We investigated a large bulk system of the 1-butyl-3-methylimidazolium triflate IL and a small cluster system of ethylamine in ethylammonium nitrate both under periodic boundary conditions. The large system displays several changes upon neglect of dispersion correction, the most striking one is the surprising decrease of the well-known microheterogeneity which is accompanied by an increase of side chain hydrogen atom-anion interplay...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27907839/influence-of-picolinic-acid-on-seizure-susceptibility-in-mice
#10
Anna Cioczek-Czuczwar, Piotr Czuczwar, Waldemar Andrzej Turski, Jolanta Parada-Turska
BACKGROUND: The mechanism of drug resistance in epilepsy remains unknown. Picolinic acid (PIC) is an endogenous metabolite of the kynurenine pathway and a chelating agent added to dietary supplements. Both inhibitory and excitatory properties of PIC were reported. The aim of this study was to determine the influence of exogenously applied PIC upon the electroconvulsive threshold and the activity of chemical convulsants in eight models of epilepsy in mice. METHODS: All experiments were performed on adult male Swiss albino mice...
October 12, 2016: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/27907207/optimized-jasmonic-acid-production-by-lasiodiplodia-theobromae-reveals-formation-of-valuable-plant-secondary-metabolites
#11
Felipe Eng, Sven Haroth, Kirstin Feussner, Dorothea Meldau, Dmitrij Rekhter, Till Ischebeck, Florian Brodhun, Ivo Feussner
Jasmonic acid is a plant hormone that can be produced by the fungus Lasiodiplodia theobromae via submerged fermentation. From a biotechnological perspective jasmonic acid is a valuable feedstock as its derivatives serve as important ingredients in different cosmetic products and in the future it may be used for pharmaceutical applications. The objective of this work was to improve the production of jasmonic acid by L. theobromae strain 2334. We observed that jasmonic acid formation is dependent on the culture volume...
2016: PloS One
https://www.readbyqxmd.com/read/27907130/environmental-nitrogen-losses-from-commercial-crop-production-systems-in-the-suwannee-river-basin-of-florida
#12
Rishi Prasad, George J Hochmuth
The springs and the Suwannee river of northern Florida in Middle Suwanee River Basin (MSRB) are among several examples in this planet that have shown a temporal trend of increasing nitrate concentration primarily due to the impacts of non-point sources such as agriculture. The rate of nitrate increase in the river as documented by Ham and Hatzell (1996) was 0.02 mg N L-1 y-1. Best management practices (BMPs) for nutrients were adopted by the commercial farms in the MSRB region to reduce the amounts of pollutants entering the water bodies, however the effectiveness of BMPs remains a topic of interest and discussion among the researchers, environmental administrators and policy makers about the loads of nitrogen entering into groundwater and river systems...
2016: PloS One
https://www.readbyqxmd.com/read/27907028/oxidative-and-anti-oxidative-stress-markers-in-chronic-glaucoma-a-systematic-review-and-meta-analysis
#13
Cédric Benoist d'Azy, Bruno Pereira, Frédéric Chiambaretta, Frédéric Dutheil
Chronic glaucoma is a multifactorial disease among which oxidative stress may play a major pathophysiological role. We conducted a systematic review and meta-analysis to evaluate the levels of oxidative and antioxidative stress markers in chronic glaucoma compared with a control group. The PubMed, Cochrane Library, Embase and Science Direct databases were searched for studies reporting oxidative and antioxidative stress markers in chronic glaucoma and in healthy controls using the following keywords: "oxidative stress" or "oxidant stress" or "nitrative stress" or "oxidative damage" or "nitrative damage" or "antioxidative stress" or "antioxidant stress" or "antinitrative stress" and "glaucoma"...
2016: PloS One
https://www.readbyqxmd.com/read/27906145/nitrobacter-sp-extract-mediated-biosynthesis-of-ag2o-nps-with-excellent-antioxidant-and-antibacterial-potential-for-biomedical-application
#14
Gopalu Karunakaran, Matheswaran Jagathambal, Alexander Gusev, Nguyen Van Minh, Evgeny Kolesnikov, Arup Ratan Mandal, Denis Kuznetsov
In this study, extracellular extract of plant growth promoting bacterium, Nitrobacter sp. is used for the bioconversion of AgNO3 (silver nitrate) into Ag2O (silver oxide nanoparticles). It is an easy, ecofriendly and single step method for Ag2O NPs synthesis. The bio-synthesized nanoparticles were characterized using different techniques. UV-Vis results showed the maximum absorbance around 450 nm. XRD result shows the particles to have faced centered cubic (fcc) crystalline nature. FTIR analysis reveals the functional groups that are involved in bioconversion such as C-N, N-H and C=O...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27906141/green-synthesis-of-zno-nanoparticles-by-olive-olea-europaea
#15
Shahla Hashemi, Zahra Asrar, Shahram Pourseyedi, Nazi Nadernejad
Green synthesis of nanoparticles is superior to physical and chemical methods as it is environment-friendly and cost-effective. The present study was carried out for inducing nanoparticles synthesis by zinc nitrate in the leaves extracts of olive. Further leaves extracts were evaluated for antiradical scavenging activity by 1, 1-diphenyl-2-picryl-hydrazyl assay. Morphological and structural properties of the synthesised ZnO nanoparticles have been characterised using UV-Vis spectrophotometer, FTIR, TEM, XRD and dynamic light scattering (DLS) analysis...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27906136/rapid-synthesis-of-silver-nanoparticles-by-pseudomonas-stutzeri-isolated-from-textile-soil-under-optimised-conditions-and-evaluation-of-their-antimicrobial-and-cytotoxicity-properties
#16
Nishant Rajora, Sanket Kaushik, Anupam Jyoti, Shanker L Kothari
Present study utilised textile soil isolated bacterium Pseudomonas stutzeri to synthesise extracellular silver nanoparticles (AgNPs) under optimised conditions. The synthesised AgNPs were characterised using ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). Optimisation showed AgNPs synthesis within 8 h using 2mM Ag nitrate at pH9, temperature 80°C and maximum absorbance toward 400 nm. TEM analysis revealed spherical shape AgNPs and reduction in size upto 8 nm was observed under optimised conditions...
December 2016: IET Nanobiotechnology
https://www.readbyqxmd.com/read/27904648/editing-of-the-urease-gene-by-crispr-cas-in-the-diatom-thalassiosira-pseudonana
#17
Amanda Hopes, Vladimir Nekrasov, Sophien Kamoun, Thomas Mock
BACKGROUND: CRISPR-Cas is a recent and powerful addition to the molecular toolbox which allows programmable genome editing. It has been used to modify genes in a wide variety of organisms, but only two alga to date. Here we present a methodology to edit the genome of Thalassiosira pseudonana, a model centric diatom with both ecological significance and high biotechnological potential, using CRISPR-Cas. RESULTS: A single construct was assembled using Golden Gate cloning...
2016: Plant Methods
https://www.readbyqxmd.com/read/27903988/metabolic-syndrome-in-relation-to-risk-of-meningioma
#18
Corinna Seliger, Christoph R Meier, Claudia Becker, Susan S Jick, Martin Proescholdt, Ulrich Bogdahn, Peter Hau, Michael F Leitzmann
BACKGROUND: Meningioma is a frequent primary intracranial tumor, the etiology of which is potentially related to adiposity. Metabolic syndrome (MetS) is an increasingly common disease characterized by having at least three of the following conditions: central adiposity, arterial hypertension, dyslipidemia, and insulin resistance. Only one prior study investigated MetS in relation to meningioma risk and found a positive association between the two. RESULTS: Among 2,027 cases and 20,269 controls, body mass index was positively associated with meningioma (p-value for trend < 0...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27903568/effects-of-trans-endocardial-delivery-of-bone-marrow-derived-cd133-cells-on-left-ventricle-perfusion-and-function-in-patients-with-refractory-angina-final-results-of-randomized-double-blinded-placebo-controlled-regent-vsel-trial
#19
Wojciech Wojakowski, Tomasz Jadczyk, Aleksandra Michalewska-Wludarczyk, Zofia Parma, Miroslaw Markiewicz, Wojciech Rychlik, Magdalena Kostkiewicz, Katarzyna Gruszczynska, Anna Blach, Monika Dzierzak-Mietla, Wojciech Wanha, Joanna Ciosek, Beata Ochala, Lukasz Rzeszutko, Wieslaw Cybulski, Lukasz Partyka, Wojciech Zasada, Witold Wludarczyk, Sebastian Dworowy, Waclaw B Kuczmik, Grzegorz Smolka, Tomasz Z Pawlowski, Andrzej Ochala, Michal Tendera
RATIONALE: New therapies for refractory angina are needed. OBJECTIVE: Assessment of trans-endocardial delivery of bone marrow (BM) CD133(+)cells in patients with refractory angina. METHODS AND RESULTS: Randomized, double-blinded, placebo-controlled trial enrolled 31 patients with recurrent CCS II-IV angina despite optimal medical therapy, ≥ one myocardial segment with inducible ischemia in Tc-99m SPECT who underwent BM biopsy and were allocated to cells (n=16) or placebo (n=15)...
November 30, 2016: Circulation Research
https://www.readbyqxmd.com/read/27902337/thermodesulfitimonas-autotrophica-gen-nov-sp-nov-a-thermophilic-obligate-sulfite-reducing-bacterium-isolated-from-a-terrestrial-hot-spring
#20
G B Slobodkina, R V Baslerov, A A Novikov, E A Bonch-Osmolovskaya, A I Slobodkin
A novel thermophilic, anaerobic, chemolithoautotrophic bacterium, strain SF97T, was isolated from a terrestrial hot spring (Kuril Islands, Russia). Cells of strain SF97T were rod-shaped and motile with a Gram-positive cell-wall type. The novel isolate grew at 45-72oC (optimum 65oC) and pH 5.5-8.5 (optimum 6.0-6.5). The strain grew chemolithoautotrophically with molecular hydrogen as electron donor, sodium sulfite or SO2 gas as electron acceptor and bicarbonate/CO2 as a carbon source. Sulfate, thiosulfate, elemental sulfur, Fe(III) or nitrate were not used as an electron acceptors either with H2 or organic electron donors...
October 27, 2016: International Journal of Systematic and Evolutionary Microbiology
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