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https://www.readbyqxmd.com/read/28445543/comparative-genomic-analysis-between-corynebacterium-pseudotuberculosis-strains-isolated-from-buffalo
#1
Marcus Vinicius Canário Viana, Henrique Figueiredo, Rommel Ramos, Luis Carlos Guimarães, Felipe Luiz Pereira, Fernanda Alves Dorella, Salah Abdel Karim Selim, Mohammad Salaheldean, Artur Silva, Alice R Wattam, Vasco Azevedo
Corynebacterium pseudotuberculosis is a Gram-positive, pleomorphic, facultative intracellular pathogen that causes Oedematous Skin Disease (OSD) in buffalo. To better understand the pathogenic mechanisms of OSD, we performed a comparative genomic analysis of 11 strains of C. pseudotuberculosis isolated from different buffalo found to be infected in Egypt during an outbreak that occurred in 2008. Sixteen previously described pathogenicity islands (PiCp) were present in all of the new buffalo strains, but one of them, PiCp12, had an insertion that contained both a corynephage and a diphtheria toxin gene, both of which may play a role in the adaptation of C...
2017: PloS One
https://www.readbyqxmd.com/read/28445231/the-effects-of-multi-day-vs-single-pre-exercise-nitrate-supplement-dosing-on-simulated-cycling-time-trial-performance-and-skeletal-muscle-oxygenation
#2
Edward Jo, Michelle Fischer, Alexandra T Auslander, Alan Beigarten, Bruce Daggy, Ken Hansen, Lisa Kessler, Adam Osmond, Hong Wang, Rachel Wes
A transient augmentation in the metabolic efficiency of skeletal muscle is the purported basis for dietary nitrate supplementation amongst competitive and recreational athletes alike. Previous studies support the ergogenic effects of nitrate supplementation as findings indicated improved microvascular blood flow, exercise economy, and performance with relatively short-term supplementation. As with most ergogenic aids, the optimum duration of supplementation prior to performance or competition, i.e. loading phase, is a critical determinant for efficacy...
April 18, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28444690/strobilurins-as-growth-promoting-compounds-how-stroby-regulates-arabidopsis-leaf-growth
#3
Judith Van Dingenen, Chrystalla Antoniou, Panagiota Filippou, Jacob Pollier, Nathalie Gonzalez, Stijn Dhondt, Alain Goossens, Vasileios Fotopoulos, Dirk Inzé
Strobilurins are an important class of agrochemical fungicides used throughout the world on a wide variety of crops as protection against fungal pathogens. In addition to this protective role, they are reported to also positively influence plant physiology. In this study, we analyzed the effect of Stroby® WG, a commercially available fungicide consisting of 50% (w/w) kresoxim-methyl (KM) as active strobilurin compound, on Arabidopsis leaf growth. Treatment of seedlings with Stroby resulted in larger leaves due to an increase in cell number...
April 25, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28444566/improvement-of-rice-seedling-growth-and-nitrogen-use-efficiency-by-seed-inoculation-with-endophytic-denitrifiers
#4
Wenfeng Wang, Yanyan Zhai, Lixiang Cao, Hongming Tan, Renduo Zhang
The aim of the present study is to investigate the effect of seed inoculation with endophytic denitrifiers on rice seedling growth and nitrogen use efficiency under low- and high-urea conditions. Pseudomonas sp. B2, Streptomyces sp. A9, and Fusarium sp. F3 were isolated from rice plant tissues. Rice seeds inoculated with the denitrifiers were sown in soil fertilized with 100 and 300 mg/kg urea concentrations, respectively. The denitrifiers increased soil ammonia concentrations or kept high ammonia concentration for a longer time in soils...
April 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28444419/the-role-of-localized-acidity-generation-in-microbially-influenced-corrosion
#5
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/28443934/hg-ii-and-pd-ii-complexes-with-a-new-selenoether-bridged-biscarbene-ligand-efficient-mono-and-bis-arylation-of-methyl-acrylate-with-a-pincer-biscarbene-pd-ii-precatalyst
#6
Rishu, Billa Prashanth, Deependra Bawari, Ushnish Mandal, Aditya Verma, Angshuman Roy Choudhury, Sanjay Singh
Two equivalents of 1-benzyl-3-bromoethylbenzimidazolium bromide couple with Na2Se to produce the first selenoether bridged bis-benzimidazolium salt (LH2)Br2. The nitrate (LH2)(NO3)2 and tetrafluoroborate (LH2)(BF4)2 salts were also synthesized from (LH2)Br2. The reaction of Hg(OAc)2 with (LH2)Br2 gave the first pseudo pincer carbene mercury complex, [Hg(L-κ(2)C)][HgBr4] (C1). Different complexes of Pd(ii) with selenoether bridged carbene were obtained using (LH2)Br2 and (LH2)(NO3)2. Syntheses of these complexes were dependent on the counter anion and the temperature...
April 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28443900/toward-wearable-sensors-optical-sensor-for-detection-of-ammonium-nitrate-based-explosives-anfo-and-annm
#7
Sara Sheykhi, Lorenzo Mosca, Pavel Anzenbacher
Increasing security needs require compact and portable detection tools for the rapid and reliable identification of explosives used in improvised explosive devices (IEDs). We report of an easy-to-use optical sensor for both vapour-phase and solution-phase identification of explosive mixtures that uses a cross-reactive fluorimetric sensor array comprising chemically responsive fluorimetric indicators composed of aromatic aldehydes and polyethyleneimine. Ammonium nitrate-nitromethane (ANNM) was analyzed by paper microzone arrays and nanofiber sensor mats...
April 26, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28443363/a-mathematical-model-of-aerobic-methane-oxidation-coupled-to-denitrification
#8
Oskar Modin
Aerobic methanotrophic bacteria use methane as their only source of energy and carbon. They release organic compounds that can serve as electron donors for co-existing denitrifiers. This interaction between methanotrophs and denitrifiers is known to contribute to nitrogen losses in natural environments and has also been exploited by researchers for denitrification of nitrate-contaminated wastewater. The purpose of this study was to develop a mathematical model describing aerobic methane oxidation coupled to denitrification in suspended growth reactors...
April 26, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28442768/synergistic-effect-of-nitrate-doped-tio2-aerosols-on-the-fast-photochemical-oxidation-of-formaldehyde
#9
Jing Shang, Wei Wei Xu, Chun Xiang Ye, Christian George, Tong Zhu
The uptake of formaldehyde (HCHO) on mineral dust affects its budget as well as particle properties, yet the process has not yet been fully investigate. Here, TiO2 and nitrate-doped TiO2 aerosols were used as proxies for mineral dust, and the uptake of HCHO was explored in a chamber under both dark and illuminated conditions. The uptake loss of HCHO on UV-illuminated aerosols is 2-9 times faster than its gaseous photolysis in our experimental system. The uptake coefficient in the range of 0.43-1.68 × 10(-7) is 1-2 orders of magnitude higher than previous reports on model mineral dust particles...
April 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28442008/biotransformation-of-rdx-and-hmx-by-anaerobic-granular-sludge-with-enriched-sulfate-and-nitrate
#10
Chunjiang An, Yarong Shi, Yanling He, Guohe Huang, Yonghong Liu, Shucheng Yang
  RDX and HMX are widely used energetic materials and they are recognized as environmental contaminants at numerous locations. The present study investigated the biotransformation of RDX and HMX by anaerobic granular sludge under sulfate- and nitrate-enriched conditions. The results showed that RDX and HMX could be transformed by anaerobic granular sludge when nitrate was present. However, the biotransformation of RDX and HMX was negatively influenced, especially with high nitrate concentrations. Sulfate-enriched conditions were more favorable for the removal of ammunition compounds by anaerobic granular sludge than nitrate-enriched conditions...
May 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28441628/potassium-deficiency-affects-the-carbon-nitrogen-balance-in-cotton-leaves
#11
Wei Hu, Taylor D Coomer, Dimitra A Loka, Derrick M Oosterhuis, Zhiguo Zhou
Potassium (K) plays important roles in the metabolism of carbon (C) and nitrogen (N), but studies of K deficiency affecting C-N balance are lacking. This study explored the influence of K deficiency on C-N interaction in cotton leaves by conducting a field experiment with cotton cultivar DP0912 under two K rates (K0: 0 kg K2O ha(-1) and K67: 67 kg K2O ha(-1)) and a controlled environment experiment with K-deficient solution (K1: 0 mM K(+)) and K-sufficient solution (K2: 6 mM K(+)). The results showed that leaf K content, leaf number, leaf area, boll number, reproductive dry weight and total dry weight were significant lower under K deficiency (K0 or K1)...
April 6, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28441606/growth-inhibition-and-antibiofilm-potential-of-ag-nanoparticles-coated-with-lectin-an-arthropod-immune-molecule
#12
Sangily Jayanthi, Sathappan Shanthi, Baskaralingam Vaseeharan, Narayanan Gopi, Marimuthu Govindarajan, Naiyf S Alharbi, Shine Kadaikunnan, Jamal M Khaled, Giovanni Benelli
Lectins from the haemolymph of arthropods, including crustaceans, are molecules potentially involved in the immune recognition and phagocytosis. Here, lectin was purified from the haemolymph of blue swimmer crab Portunus pelagicus, using mannose-coupled sepharose CL-4B affinity column chromatography. In SDS-PAGE analysis, lectin showed a molecular mass of approximately 155kDa. The synthesis of lectin-coated silver nanoparticles (lectin-coated AgNPs) was confirmed by UV-Vis spectroscopy, XRD, FTIR, SEM, TEM, SAED, and EDX analysis...
April 13, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28441597/differences-in-nitrate-and-phosphorus-export-between-wooded-and-grassed-riparian-zones-from-farmland-to-receiving-waterways-under-varying-rainfall-conditions
#13
Amanda D Neilen, Chengrong R Chen, Brett M Parker, Stephen J Faggotter, Michele A Burford
Agricultural activities in catchments can cause excessive nutrient loads in waterways. Catchment nitrogen (N) and phosphorus (P) flows may be intercepted and assimilated by riparian vegetation. While prior studies suggest that woody vegetation is preferable for reducing P loads, the question remains: is woody vegetation or grass cover more effective at reducing catchment N and P exports to waterways. To address this we investigated the relative importance of vegetation type, hydrologic and soil microbial processes on N and P losses from soil to a stream...
April 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28441345/levels-and-distribution-of-pollutants-in-the-waters-of-an-aquatic-ecosystem-in-northern-mexico
#14
Jesús Manuel Ochoa-Rivero, Ana Victoria Reyes-Fierro, Ma Del Rosario Peralta-Pérez, Francisco Javier Zavala-Díaz de la Serna, Lourdes Ballinas-Casarrubias, Ivan Salmerón, Héctor Rubio-Arias, Beatriz A Rocha-Gutiérrez
The availability of good quality water resources is essential to ensure healthy crops and livestock. The objective of this study was to evaluate the level of pollution in Bustillos Lagoon in northern Mexico. Physical-chemical parameters like sodium, chloride, sulfate, electrical conductivity, nitrates, and the pesticide dichlorodiphenyltrichloroethane (DDT) were analyzed to determine the water quality available in the lagoon. Although DDT has been banned in several countries, it is still used for agricultural purposes in Mexico and its presence in this area had not been analyzed previously...
April 25, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28441286/behavior-of-americium-in-simulated-wounds-in-nonhuman-primates
#15
Deepesh Poudel, Raymond A Guilmette, Luiz Bertelli, John A Klumpp, Richard R Brey
An americium solution injected intramuscularly into several nonhuman primates (NHPs) was found to behave differently than predicted by the wound models described in the NCRP Report 156. This was because the injection was made along with a citrate solution, which is known to be more soluble than chlorides, oxides, or nitrates on which the NCRP Report was based. A multi-exponential wound model specific to the injected americium solution was developed based on the retention in the intramuscular sites. The model was coupled with the americium systemic model to interpret the urinary excretion data and assess the intake, and it was determined that the models were adequate to predict early urinary excretion in most cases but unable to predict late urinary excretion...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28440629/relevant-features-of-a-triethylene-glycol-dimethyl-ether-based-electrolyte-for-application-in-lithium-battery
#16
Lorenzo Carbone, Daniele Di Lecce, Mallory Gobet, Stephen Munoz, Matthew Devany, Steve Greenbaum, Jusef Hassoun
Triethylene glycol dimethyl ether (TREGDME) dissolving lithium trifluoromethane sulfonate (LiCF3SO3) is studied as a suitable electrolyte medium for lithium battery. Thermal and rheological characteristics, transport properties of the dissolved species, and the electrochemical behavior in lithium cell represent the most relevant investigated properties of the new electrolyte. The self-diffusion coefficients, the lithium transference numbers, the ionic conductivity, and the ion association degree of the solution are determined by pulse field gradient nuclear magnetic resonance and electrochemical impedance spectroscopy...
April 25, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28440581/the-toxicity-of-silver-to-soil-organisms-exposed-to-silver-nanoparticles-and-silver-nitrate-in-biosolids-amended-field-soil
#17
Alexander H Jesmer, Jessica R Velicogna, Dina M Schwertfeger, Richard P Scroggins, Juliska I Princz
The use of engineered silver nanoparticles (AgNP) is widespread, with expected release to the terrestrial environment through the application of biosolids onto agricultural lands. The toxicity of AgNP and AgNO3 (as ionic Ag(+) ) to plant (Elymus lanceolatus and Trifolium pratense) and soil invertebrate (Eisenia andrei and Folsomia candida) species was assessed using silver-amended biosolids applied to a natural sandy loam soil. Bioavailable Ag(+) in soil samples was estimated using an ion-exchange technique applied to KNO3 soil extracts while exposure to dispersible AgNP was verified by single particle-ICP-MS and TEM-EDS analysis...
April 25, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28439265/bacterial-and-fungal-community-structures-in-loess-plateau-grasslands-with-different-grazing-intensities
#18
Huhe, Xianjiang Chen, Fujiang Hou, Yanpei Wu, Yunxiang Cheng
The Loess Plateau of China is one of the most fragile ecosystems worldwide; thus, human production activities need to be conducted very cautiously. In this study, MiSeq high-throughput sequencing was applied to assess the relationship between bacterial and fungal community structures and changes in vegetation and soil physical and chemical properties induced by grazing, in four grasslands with different levels of grazing intensity (0, 2.67, 5.33, and 8.67 sheep/ha) in the semiarid region of the Loess Plateau...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28439264/benthic-diatom-based-indices-for-water-quality-assessment-in-two-subtropical-streams
#19
Xiang Tan, Quanfa Zhang, Michele A Burford, Fran Sheldon, Stuart E Bunn
Benthic diatoms have been universally used as indicators to assess water quality in lotic ecosystems. However, most diatom-based indices developed in Europe have not been widely used or tested in other continents such as Asia or Oceania. This study compared the performance of 14 widely-applied diatom indices in assessing ecological conditions in subtropical streams in South East Queensland (SEQ) in Australia and in the upper Han River in China. Most water quality variables in the upper Han River including dissolved organic carbon (DOC), total nitrogen (TN), and soluble reactive phosphorus (SRP) had strong relationships with at least one diatom index, with the exception of IDAP (Index Diatom Artois-Picardie), and TDI (Trophic Diatom Index)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28439033/genome-wide-identification-of-resd-nsrr-and-fur-binding-in-bacillus-subtilis-during-anaerobic-fermentative-growth-by-in-vivo-footprinting
#20
Onuma Chumsakul, Divya P Anantsri, Tai Quirke, Taku Oshima, Kensuke Nakamura, Shu Ishikawa, Michiko M Nakano
Upon oxygen limitation, the Bacillus subtilis ResE sensor kinase and its cognate ResD response regulator play primary roles in transcriptional activation of genes functioning in anaerobic respiration. The nitric oxide (NO)-sensitive NsrR repressor controls transcription to support nitrate respiration. In addition, the ferric uptake repressor (Fur) can modulate transcription under anaerobic conditions. However, whether these controls are direct or indirect has been investigated only in a gene-specific manner...
April 24, 2017: Journal of Bacteriology
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