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https://www.readbyqxmd.com/read/29342204/bulk-metal-concentrations-versus-total-suspended-solids-in-rivers-time-invariant-catchment-specific-relationships
#1
Touraj Nasrabadi, Hermann Ruegner, Marc Schwientek, Jeremy Bennett, Shahin Fazel Valipour, Peter Grathwohl
Suspended particles in rivers can act as carriers of potentially bioavailable metal species and are thus an emerging area of interest in river system monitoring. The delineation of bulk metals concentrations in river water into dissolved and particulate components is also important for risk assessment. Linear relationships between bulk metal concentrations in water (CW,tot) and total suspended solids (TSS) in water can be used to easily evaluate dissolved (CW, intercept) and particle-bound metal fluxes (CSUS, slope) in streams (CW,tot = CW + CSUS TSS)...
2018: PloS One
https://www.readbyqxmd.com/read/29342197/molecular-discrimination-of-tall-fescue-morphotypes-in-association-with-festuca-relatives
#2
Shyamal K Talukder, Perumal Azhaguvel, Konstantin Chekhovskiy, Malay C Saha
Tall fescue (Festuca arundinacea Schreb.) is an important cool-season perennial grass species used as forage and turf, and in conservation plantings. There are three morphotypes in hexaploid tall fescue: Continental, Mediterranean and Rhizomatous. This study was conducted to develop morphotype-specific molecular markers to distinguish Continental and Mediterranean tall fescues, and establish their relationships with other species of the Festuca genus for genomic inference. Chloroplast sequence variation and simple sequence repeat (SSR) polymorphism were explored in 12 genotypes of three tall fescue morphotypes and four Festuca species...
2018: PloS One
https://www.readbyqxmd.com/read/29341852/emissions-of-organic-compounds-from-produced-water-ponds-ii-evaluation-of-flux-chamber-measurements-with-inverse-modeling-techniques
#3
Huy N Q Tran, Seth N Lyman, Marc L Mansfield, Trevor O'Neil, Richard L Bowers, Ann P Smith, Cara Keslar
In this study, we apply two different dispersion models to evaluate flux chamber measurements of emissions of 58 organic compounds, including C2-C11 hydrocarbons and methanol, ethanol, and isopropanol from oil and gas produced water ponds in the Uintah Basin. Field measurement campaigns using the flux chamber technique were performed at a limited number of produced water ponds in the Basin throughout 2013-2016. Inverse modeling results showed significantly higher emissions than were measured by the flux chamber...
January 17, 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/29341829/climatic-modulation-of-neurotransmitter-release-in-amphibian-neuromuscular-junctions-role-of-dynorphin-a
#4
Dengyun Ge, Nickolas Anastasios Lavidis
Amphibian neuromuscular junctions become relatively more silent during the dry-winter season in Australia. Endogenous opioid peptides play an important role in the regulation of the physiological functions of active and dormant vertebrates. Previous findings suggest that dynorphin-A is more potent than other opiates in decreasing evoked neurotransmission in amphibian neuromuscular junctions. Dynorphin-A has been shown not to alter the amplitude or the frequency of spontaneous quantal neurotransmitter release...
January 17, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29341794/preseason-strength-assessment-of-the-rotator-muscles-and-shoulder-injury-in-handball-players
#5
Bénédicte Forthomme, Jean-Louis Croisier, François Delvaux, Jean-François Kaux, Jean-Michel Crielaard, Sophie Gleizes-Cervera
CONTEXT:   Few researchers have identified intrinsic risk factors for shoulder injury in team handball players by analyzing measurements of maximal isokinetic rotator muscle strength. OBJECTIVE:   To identify possible intrinsic risk factors for shoulder injury by analyzing measurements of maximal isokinetic rotator muscle strength. DESIGN:   Cross-sectional study. SETTING:   Male team handball senior divisions (the highest level) in France and Belgium...
January 17, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29341791/population-level-evidence-for-seasonality-of-the-human-microbiome
#6
Christina Korownyk, Fangwei Liu, Scott Garrison
The objective of this study is to determine whether human body odors undergo seasonal modulation. We utilized google trends search volume from the United States of America from January 1, 2010 to June 24, 2017 for a number of predetermined body odors. Regression modeling of time series data was completed. Our primary outcome was to determine the proportion of the variability in Internet searches for each unpleasant odor (about the mean) that is explained by a seasonal model. We determined that the seasonal (sinusoidal) model provided a significantly better fit than the null model (best straight line fit) for all searches relating to human body odors (P <...
January 17, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29341607/in-vitro-pharmacokinetic-optimizations-of-am2-s31n-channel-blockers-led-to-the-discovery-of-slow-binding-inhibitors-with-potent-antiviral-activity-against-drug-resistant-influenza-a-viruses
#7
Yuanxiang Wang, Yanmei Hu, Shuting Xu, Yongtao Zhang, Rami Musharrafieh, Raymond Kin Hau, Chunlong Ma, Jun Wang
Influenza viruses are respiratory pathogens that are responsible for both seasonal influenza epidemics and occasional influenza pandemics. The narrow therapeutic window of oseltamivir, coupled with the emergence of drug resistance, calls for the next-generation of antivirals. With our continuous interest in developing AM2-S31N inhibitors as oral influenza antivirals, we report here the progress of optimizing the in vitro pharmacokinetic (PK) properties of AM2-S31N inhibitors. Several AM2-S31N inhibitors, including compound 10b, were discovered to have potent channel blockage, single to submicromolar antiviral activity, and favorable in vitro PK properties...
January 17, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29341358/thermal-and-hydrologic-responses-to-climate-change-predict-marked-alterations-in-boreal-stream-invertebrate-assemblages
#8
Kaisa-Riikka Mustonen, Heikki Mykrä, Hannu Marttila, Romain Sarremejane, Noora Veijalainen, Kalle Sippel, Timo Muotka, Charles P Hawkins
Air temperature at the northernmost latitudes is predicted to increase steeply and precipitation to become more variable by the end of the 21st century, resulting in altered thermal and hydrological regimes. We applied five climate scenarios to predict the future (2070 to 2100) benthic macroinvertebrate assemblages at 239 near-pristine sites across Finland (ca. 1200 km latitudinal span). We used a multitaxon distribution model with air temperature and modeled daily flow as predictors. As expected, projected air temperature increased the most in northernmost Finland...
January 17, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29341100/underdiagnosis-of-influenza-virus-infection-in-hospitalized-older-adults
#9
Lauren Hartman, Yuwei Zhu, Kathryn M Edwards, Marie R Griffin, H Keipp Talbot
OBJECTIVE: To describe factors associated with provider-ordered influenza testing among hospitalized adults. DESIGN: Information on patient demographics, symptoms, and provider-ordered influenza testing were collected by questionnaire and chart review. We conducted prospective laboratory-based surveillance using reverse-transcriptase polymerase chain reaction (RT-PCR), the gold-standard for diagnosis of influenza, to determine how patient characteristics and provider-ordered testing impacted accurate influenza diagnosis...
January 17, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29341029/in-vitro-and-in-situ-absorption-and-metabolism-of-sesquiterpenes-from-petasites-hybridus-extracts
#10
Lucia Disch, Kristina Forsch, Beate Siewert, Jürgen Drewe, Gert Fricker
Petasites hybridus extract is used in the treatment of seasonal allergic rhinitis. The aim of this study was to evaluate the active constituent petasin and its isomers isopetasin and neopetasin (petasins) in the P. hybridus extract Ze 339 for liberation, dissolution, absorption, and metabolism. The determination of pH-dependent thermodynamic solubility was performed via the shake-flask method. Petasins exhibited a low solubility that was pH independent. In vivo, the concentration of solute drugs is decreased continuously by intestinal absorption...
January 16, 2018: Planta Medica
https://www.readbyqxmd.com/read/29340852/a-geochemical-view-into-continental-palaeotemperatures-of-the-end-permian-using-oxygen-and-hydrogen-isotope-composition-of-secondary-silica-in-chert-rubble-breccia-kaibab-formation-grand-canyon-usa
#11
Ray Kenny
The upper carbonate member of the Kaibab Formation in northern Arizona (USA) was subaerially exposed during the end Permian and contains fractured and zoned chert rubble lag deposits typical of karst topography. The karst chert rubble has secondary (authigenic) silica precipitates suitable for estimating continental weathering temperatures during the end Permian karst event. New oxygen and hydrogen isotope ratios of secondary silica precipitates in the residual rubble breccia: (1) yield continental palaeotemperature estimates between 17 and 22 °C; and, (2) indicate that meteoric water played a role in the crystallization history of the secondary silica...
January 16, 2018: Geochemical Transactions
https://www.readbyqxmd.com/read/29340714/taxonomical-resolution-and-distribution-of-bacterioplankton-along-the-vertical-gradient-reveals-pronounced-spatiotemporal-patterns-in-contrasted-temperate-freshwater-lakes
#12
J Keshri, A S Pradeep Ram, P A Nana, T Sime-Ngando
We examined the relationship between viruses and co-occurring bacterial communities across spatiotemporal scale in two contrasting freshwater lakes, namely meromictic Lake Pavin and dimictic Lake Aydat (Central France). Next-generation sequencing of 16S rRNA genes suggested distinct patterns in bacterioplankton community composition (BCC) between the lakes over depths and seasons. BCC were generally dominated by members of Actinobacteria, Proteobacteria, and Bacteroidetes covering about 95% of all sequences...
January 16, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29340454/human-leptospirosis-in-the-federal-district-brazil-2011-2015-eco-epidemiological-characterization
#13
Ivanildo de Oliveira Correia Santos, Marina Frota de Albuquerque Landi, Laurício Monteiro Cruz, Maria Isabel Rao Bofill, Divino Eterno Dos Santos, Eduardo Maurício Mendes de Lima, Márcio Botelho de Castro
INTRODUCTION: Leptospirosis is an infectious disease that affects more than 5,000 people per year in Brazil. The Federal District (FD) lacks epidemiological studies of human leptospirosis and presents concerning rates of this disease, especially considering its lethality. METHODS: Seventy-nine autochthonous human cases of leptospirosis between 2011 and 2015 were analyzed, with the probable infection location serving as a basis for the collection and analysis of the environmental and epidemiological variables...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29340327/trimethoprim-sulfamethoxazole-reduces-rates-of-melioidosis-in-high-risk-hemodialysis-patients
#14
Sandawana William Majoni, Jaquelyne T Hughes, Bianca Heron, Bart J Currie
Introduction: Melioidosis causes sepsis and death in the Top End of Northern Australia during the monsoonal wet season. Dialysis-dependent adults suffer higher melioidosis rates compared to low rates among renal transplant patients who routinely receive trimethoprim+sulfamethoxazole prophylaxis. Methods: We performed a prospective interventional study to determine the efficacy and safety of daily trimethoprim+sulfamethoxazole prophylaxis in hemodialysis patients during the wet season, from 1 November 2014 to 30 April 2015...
January 2018: KI Reports
https://www.readbyqxmd.com/read/29340234/achilles-heel-of-a-powerful-invader-restrictions-on-distribution-and-disappearance-of-feral-pigs-from-a-protected-area-in-northern-pantanal-western-brazil
#15
Jose L P Cordeiro, Gabriel S Hofmann, Carlos Fonseca, Luiz Flamarion B Oliveira
This paper focuses on a rare case of natural disappearance of feral pigs (Sus scrofa) in an extensive area without using traditional methods of eradication programs. The study was conducted both in the Private Reserve of Natural Heritage (PRNH) Sesc Pantanal and in an adjacent traditional private cattle ranch. In 1998, feral pigs were abundant and widely distributed in the PRNH. However, the feral pigs gradually disappeared from the area and currently, the absence of pigs in the PRNH contrasts with the adjacent cattle ranch where the species is abundant...
2018: PeerJ
https://www.readbyqxmd.com/read/29339970/a-new-image-based-tool-for-the-high-throughput-phenotyping-of-pollen-viability-evaluation-of-inter-and-intra-cultivar-diversity-in-grapevine
#16
Javier Tello, María Ignacia Montemayor, Astrid Forneck, Javier Ibáñez
Background: Low pollen viability may limit grapevine yield under certain conditions, causing relevant economic losses to grape-growers. It is usually evaluated by the quantification of the number of viable and non-viable pollen grains that are present in a sample after an adequate pollen grain staining procedure. Although the manual counting of both types of grains is the simplest and most sensitive approach, it is a laborious and time-demanding process. In this regard, novel image-based approaches can assist in the objective, accurate and cost-effective phenotyping of this trait...
2018: Plant Methods
https://www.readbyqxmd.com/read/29339780/extractable-pool-of-biochar-controls-on-crop-productivity-rather-than-greenhouse-gas-emission-from-a-rice-paddy-under-rice-wheat-rotation
#17
Punhoon Khan Korai, Xin Xia, Xiaoyu Liu, Rongjun Bian, Morris Oduor Omondi, Alphonse Nahayo, Genxing Pan
The role of extractable pool of biochar in crop productivity and soil greenhouse gas (GHGs) emission is not yet clear. In this study, two biochars with and without extraction was added to a paddy before rice transplantation at 20 t·ha-1. Crop yield, plant traits and greenhouse gas emission monitored throughout a rice-wheat rotation. Between the biochar treatments, changes in bulk density and microbial biomass carbon were insignificant. However, the increase in organic carbon was similar between maize and wheat biochars while higher under bulk wheat biochar than extracted one...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339427/pandemic-paradox-early-life-h2n2-pandemic-influenza-infection-enhanced-susceptibility-to-death-during-the-2009-h1n1-pandemic
#18
Alain Gagnon, Enrique Acosta, Stacey Hallman, Robert Bourbeau, Lisa Y Dillon, Nadine Ouellette, David J D Earn, D Ann Herring, Kris Inwood, Joaquin Madrenas, Matthew S Miller
Recent outbreaks of H5, H7, and H9 influenza A viruses in humans have served as a vivid reminder of the potentially devastating effects that a novel pandemic could exert on the modern world. Those who have survived infections with influenza viruses in the past have been protected from subsequent antigenically similar pandemics through adaptive immunity. For example, during the 2009 H1N1 "swine flu" pandemic, those exposed to H1N1 viruses that circulated between 1918 and the 1940s were at a decreased risk for mortality as a result of their previous immunity...
January 16, 2018: MBio
https://www.readbyqxmd.com/read/29339343/an-integrated-evaluation-of-some-faecal-indicator-bacteria-fib-and-chemical-markers-as-potential-tools-for-monitoring-sewage-contamination-in-subtropical-estuaries
#19
Ana Caroline Cabral, Jonathan S Stark, Hedda E Kolm, César C Martins
Sewage input and the relationship between chemical markers (linear alkylbenzenes and coprostanol) and fecal indicator bacteria (FIB, Escherichia coli and enterococci), were evaluated in order to establish thresholds values for chemical markers in suspended particulate matter (SPM) as indicators of sewage contamination in two subtropical estuaries in South Atlantic Brazil. Both chemical markers presented no linear relationship with FIB due to high spatial microbiological variability, however, microbiological water quality was related to coprostanol values when analyzed by logistic regression, indicating that linear models may not be the best representation of the relationship between both classes of indicators...
January 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29339182/interrelationship-among-annual-cycles-of-sex-steroids-corticosterone-and-body-condition-in-nyctibatrachus-humayuni
#20
A M Joshi, E J Narayan, N P Gramapurohit
Synergism between extrinsic and intrinsic factors is crucial for the seasonality of reproduction. Environmental factors such as photoperiod and temperature activate the hypothalamus-pituitary-gonadal axis leading to the secretion of steroid hormones that are crucial for reproduction. Sex steroids are not only essential for the maturation of gonads, but also for development of secondary sexual characters in males and reproductive behaviour of both the sexes. In the present study, we quantified the urinary testosterone (UTM) and corticosterone (UCM) metabolites in males and urinary estradiol metabolites (UEM) and UCM in females of Nyctibatrachus humayuni for two consecutive years to determine annual and seasonal variation in the levels of sex steroids, corticosterone and body condition index (BCI)...
January 12, 2018: General and Comparative Endocrinology
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