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https://www.readbyqxmd.com/read/28918505/purification-and-characterization-of-skeletal-muscle-pyruvate-kinase-from-the-hibernating-ground-squirrel-urocitellus-richardsonii-potential-regulation-by-posttranslational-modification-during-torpor
#1
Ryan A V Bell, Kenneth B Storey
Ground squirrel torpor during winter hibernation is characterized by numerous physiological and biochemical changes, including alterations to fuel metabolism. During torpor, many tissues switch from carbohydrate to lipid catabolism, often by regulating key enzymes within glycolytic and lipolytic pathways. This study investigates the potential regulation of pyruvate kinase (PK), a key member of the glycolytic pathway, within the skeletal muscle of hibernating ground squirrels. PK was purified from the skeletal muscle of control and torpid Richardson's ground squirrels, and PK kinetics, structural stability, and posttranslational modifications were subsequently assessed...
September 16, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28918458/cadmium-losses-in-overland-flow-from-an-agricultural-soil
#2
Colin William Gray, Ross Martin Monaghan, Tom Orchiston, Seth Laurenson, Jo-Anne Cavanagh
Cadmium (Cd) transport in overland flow from agricultural soils is potentially important when trying to predict future soil Cd concentrations, but at present there is little information on the magnitude of loss from this pathway. This study measured Cd concentrations and fluxes in overland flow from a catchment where cattle winter-grazed a forage crop (kale) (Brassica oleracea) in year one and measurements continued in year two when the catchment was returned to pasture and grazed by sheep. Flow-weighted mean concentrations (FWMC) of total, particulate and dissolved Cd in overland flow events from the forage crop were 0...
September 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28918281/distribution-of-vocs-in-urban-and-rural-atmospheres-of-subtropical-india-temporal-variation-source-attribution-ratios-ofp-and-risk-assessment
#3
Amit Kumar, Deepak Singh, Krishan Kumar, Braj Bihari Singh, Vinod Kumar Jain
This paper reports the first study which comprises the seasonal, diurnal variability, source characterization, ozone forming potential and risk assessment of volatile organic compounds (VOCs) at three sites (two urban and one rural) in the National Capital Territory of Delhi, India. The study was performed during three seasons of the year 2013-14 and two different categories of VOCs (aromatics and halogenated) have been selected. The study used the sampling and analytical procedures of NIOSH methods. Results showed that the mean concentration of sum of VOCs (∑VOC) is significantly higher at urban sites (110...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918279/seasonal-variation-of-chloro-s-triazines-in-the-hartbeespoort-dam-catchment-south-africa
#4
Cornelius Rimayi, David Odusanya, Jana M Weiss, Jacob de Boer, Luke Chimuka
Seasonal variation of eight chloro-s-triazine herbicides and seven major atrazine and terbuthylazine degradation products was monitored in the Hartbeespoort Dam catchment using gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS/MS). Lake, river and groundwater were sampled from the Hartbeespoort Dam catchment over four seasons and the downstream Jukskei River was monitored during the winter season. Triazine herbicide concentrations in the Hartbeespoort Dam were in the order atrazine>simazine>propazine>ametryn>prometryn throughout the four seasons sampled...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28918142/mortality-and-health-treatment-rates-of-dairy-calves-in-automated-milk-feeding-systems-in-the-upper-midwest-of-the-united-states
#5
M W Jorgensen, A Adams-Progar, A M de Passillé, J Rushen, J A Salfer, M I Endres
Automated calf feeding systems are increasing in use across the United States, yet information regarding health and mortality outcomes of animals in these systems is limited. The objective of this study was to investigate the relationship between farm management practices, housing, and environmental factors with mortality and health treatment rates of preweaned dairy calves housed in groups with automated feeding systems. Farm records were collected for health treatments and mortality on 26 farms in the Upper Midwest of the United States...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28917222/validation-of-summer-and-winter-elisa-measurements-of-serum-25-hydroxyvitamin-d-concentrations-in-mongolia
#6
Sabri Bromage, Daria Tselmen, Gary Bradwin, Michael F Holick, Davaasaambuu Ganmaa
BACKGROUND AND OBJECTIVES: Assay cost, quality, and availability pose challenges for vitamin D surveys in limited resource settings. This study aimed to validate an inexpensive vitamin D assay (ELISA) under real-world conditions in Mongolia, the northernmost developing country, to characterize the assay's usefulness and inform the design of epidemiologic studies in similar regions. METHODS AND STUDY DESIGN: We collected paired summer and winter serum samples from 120 men and women (aged 20-57 years) in urban and rural Mongolia, analyzed each sample for 25(OH)D concentration using both Immunodiagnostic Systems ELISA and DiaSorin LIAISON 25(OH)D TOTAL, and compared the assays using multiple statistics...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28916503/altered-serotonergic-and-gabaergic-neurotransmission-in-a-mice-model-of-obsessive-compulsive-disorder
#7
Christine Winter, Dana M Greene, Paraskevi Mavrogiorgou, Helge Schaper, Reinhard Sohr, Abel Bult-Ito, Georg Juckel
There is ample evidence that obsessive-compulsive disorder (OCD) is based on reduced serotonergic function. Replicated bidirectional selection for thermoregulatory nest-building behavior in the laboratory house mouse (Mus musculus) resulted in compulsive-like, non-compulsive-like and randomly bred control mice that represent a non-induced animal model of OCD. The present study aimed at investigating the neurochemical patterns in specific brain regions of compulsive-like (HA) versus non-compulsive-like (LA) and normal (CA) mice...
September 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28916120/does-early-and-appropriate-antibiotic-administration-improve-mortality-in-emergency-department-patients-with-severe-sepsis-or-septic-shock
#8
Robert Sherwin, Michael E Winters, Gary M Vilke, Gabriel Wardi
BACKGROUND: Severe sepsis and septic shock remain significant public health concerns. Appropriate emergency department management includes early recognition, hemodynamic resuscitation, source control, and prompt antibiotic administration. Current international guidelines strongly recommend administration of early and appropriate antibiotics for patients with severe sepsis and septic shock. Interestingly, a recent Cochrane Review found insufficient evidence to provide a similar recommendation on antibiotic administration...
September 12, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28915923/season-but-not-symbiont-state-drives-microbiome-structure-in-the-temperate-coral-astrangia-poculata
#9
Koty H Sharp, Zoe A Pratte, Allison H Kerwin, Randi D Rotjan, Frank J Stewart
BACKGROUND: Understanding the associations among corals, their photosynthetic zooxanthella symbionts (Symbiodinium), and coral-associated prokaryotic microbiomes is critical for predicting the fidelity and strength of coral symbioses in the face of growing environmental threats. Most coral-microbiome associations are beneficial, yet the mechanisms that determine the composition of the coral microbiome remain largely unknown. Here, we characterized microbiome diversity in the temperate, facultatively symbiotic coral Astrangia poculata at four seasonal time points near the northernmost limit of the species range...
September 15, 2017: Microbiome
https://www.readbyqxmd.com/read/28915877/vole-abundance-and-reindeer-carcasses-determine-breeding-activity-of-arctic-foxes-in-low-arctic-yamal-russia
#10
Dorothee Ehrich, Maite Cerezo, Anna Y Rodnikova, Natalya A Sokolova, Eva Fuglei, Victor G Shtro, Aleksandr A Sokolov
BACKGROUND: High latitude ecosystems are at present changing rapidly under the influence of climate warming, and specialized Arctic species at the southern margin of the Arctic may be particularly affected. The Arctic fox (Vulpes lagopus), a small mammalian predator endemic to northern tundra areas, is able to exploit different resources in the context of varying tundra ecosystems. Although generally widespread, it is critically endangered in subarctic Fennoscandia, where a fading out of the characteristic lemming cycles and competition with abundant red foxes have been identified as main threats...
September 16, 2017: BMC Ecology
https://www.readbyqxmd.com/read/28915873/a-prospective-cohort-study-on-ambient-air-pollution-and-respiratory-morbidities-including-childhood-asthma-in-adolescents-from-the-western-cape-province-study-protocol
#11
Toyib Olaniyan, Mohamed Jeebhay, Martin Röösli, Rajen Naidoo, Roslynn Baatjies, Nino Künzil, Ming Tsai, Mark Davey, Kees de Hoogh, Dilys Berman, Bhawoodien Parker, Joy Leaner, Mohamed Aqiel Dalvie
BACKGROUND: There is evidence from existing literature that ambient air pollutant exposure in early childhood likely plays an important role in asthma exacerbation and other respiratory symptoms, with greater effect among asthmatic children. However, there is inconclusive evidence on the role of ambient air pollutant exposures in relation to increasing asthma prevalence as well as asthma induction in children. At the population level, little is known about the potential synergistic effects between pollen allergens and air pollutants since this type of association poses challenges in uncontrolled real life settings...
September 16, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28915545/air-pollution-at-rochester-ny-long-term-trends-and-multivariate-analysis-of-upwind-so2-source-impacts
#12
Fereshteh Emami, Mauro Masiol, Philip K Hopke
There have been many changes in the air pollutant sources in the northeastern United States since 2001. To assess the effect of these changes, trend analyses of the monthly average values were performed on PM2.5 and its components including major ions, elemental carbon (EC), organic carbon (OC), and gaseous pollutant concentrations measured between 2001 (in some cases 1999) and 2015 at the NYS Department of Environmental Conservation sites in Rochester, NY. Mann-Kendall regression with Sen's slope was applied to estimate the trends and seasonality...
September 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915541/temporal-variability-in-aerosol-characteristics-and-its-radiative-properties-over-patiala-northwestern-part-of-india-impact-of-agricultural-biomass-burning-emissions
#13
D Sharma, A K Srivastava, K Ram, A Singh, D Singh
A comprehensive measurements of aerosol optical depth (AOD), particulate matter (PM) and black carbon (BC) mass concentrations have been carried out over Patiala, a semi-urban site in northwest India during October 2008 to September 2010. The measured aerosol data was incorporated in an aerosol optical model to estimate various aerosol optical parameters, which were subsequently used for radiative forcing estimation. The measured AOD at 500 nm (AOD500) shows a significant seasonal variability, with maximum value of 0...
September 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28915461/forecasting-wheat-and-barley-crop-production-in-arid-and-semi-arid-regions-using-remotely-sensed-primary-productivity-and-crop-phenology-a-case-study-in-iraq
#14
Sarchil Hama Qader, Jadunandan Dash, Peter M Atkinson
Crop production and yield estimation using remotely sensed data have been studied widely, but such information is generally scarce in arid and semi-arid regions. In these regions, inter-annual variation in climatic factors (such as rainfall) combined with anthropogenic factors (such as civil war) pose major risks to food security. Thus, an operational crop production estimation and forecasting system is required to help decision-makers to make early estimates of potential food availability. Data from NASA's MODIS with official crop statistics were combined to develop an empirical regression-based model to forecast winter wheat and barley production in Iraq...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915064/the-immunopathologic-effects-of-mycoplasma-pneumoniae-and-cards-toxin-a-primate-model
#15
Diego J Maselli, Jorge L Medina, Edward G Brooks, Jacqueline J Coalson, Thirumalai R Kannan, Vicki T Winter, Molly Principe, Marianna P Cagle, Joel B Baseman, Peter H Dube, Jay I Peters
Mycoplasma pneumoniae infection has been linked to poor asthma outcomes. M. pneumoniae produces an ADP-ribosylating and vacuolating toxin called Community Acquired Respiratory Distress Syndrome (CARDS) toxin that has a major role in inflammation and airway dysfunction. The objective was to evaluate the immunopathological effects in primates exposed to M. pneumoniae or CARDS toxin. Thirteen baboons were exposed to M. pneumoniae or CARDS toxin. At day 7 and 14, bronchoalveolar lavage fluid was collected and analyzed for cell count, percent of each type of cell, CARDS toxin by PCR, CARDS toxin by antigen capture, eosinophilic cationic protein, and cytokine profiles...
September 15, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28914972/seasonal-patterns-of-acute-and-recurrent-idiopathic-pericarditis
#16
Yoav Hammer, Jihad Bishara, Alon Eisen, Zaza Iakobishvili, Ran Kornowski, Aviv Mager
BACKGROUND: Idiopathic pericarditis is presumed to result from viral infection. The incidence rates of some viral infections have typical seasonal patterns. The data in the literature on a possible seasonal pattern of acute pericarditis are very limited. The mechanism and possible seasonality of recurrent episodes are not well established . HYPOTHESIS: The incidence of acute idiopathic pericarditis has a seasonal pattern. METHODS: The computerized database of a tertiary, university-affiliated hospital was searched for all patients admitted with a first episode of acute idiopathic pericarditis between January 1, 2010 and December 31, 2015...
September 15, 2017: Clinical Cardiology
https://www.readbyqxmd.com/read/28914773/vitamin-d-nutritional-status-and-its-related-factors-for-chinese-children-and-adolescents-in-2010-2012
#17
Yichun Hu, Jing Chen, Rui Wang, Min Li, Chunfeng Yun, Weidong Li, Yanhua Yang, Jianhua Piao, Xiaoguang Yang, Lichen Yang
Vitamin D plays a critical role in calcium and phosphate metabolism and helps maintain skeletal integrity in childhood, yet vitamin D status in Chinese children and adolescents is not well documented. The aim of this study was to assess the vitamin D status and analyze the risk factors for vitamin D deficiency in Chinese children and adolescents aged 6-17 years. Serum 25 hydroxyvitamin D (25(OH)D) was measured with a radioimmunoassay kit in 15,000 children and adolescent participants in the Chinese national nutrition and health survey (CNNHS) 2010-2012...
September 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28914608/models-and-materials-for-generalized-kitaev-magnetism
#18
Stephen M Winter, Alexander A Tsirlin, Maria Daghofer, Jeroen van den Brink, Yogesh Singh, Philipp Gegenwart, Roser Valenti
The exactly solvable Kitaev model on the honeycomb lattice has recently received enormous attention linked to the hope of achieving novel spin-liquid states with fractionalized Majorana-like excitations. In this review, we analyze the mechanism proposed by G. Jackeli and G. Khaliullin to identify Kitaev materials based on spin-orbital dependent bond interactions and provide a comprehensive overview of its implications in real materials. We set the focus on experimental results and current theoretical understanding of planar honeycomb systems (Na2IrO3, γ-Li2IrO3, and α-RuCl3), three-dimensional Kitaev materials (β- and γ-Li2IrO3), and other potential candidates, completing the review with the list of open questions awaiting new insights...
September 15, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28914603/synaptic-up-scaling-preserves-motor-circuit-output-after-chronic-natural-inactivity
#19
Joseph M Santin, Mauricio Vallejo, Lynn K Hartzler
Neural systems use homeostatic plasticity to maintain normal brain functions and to prevent abnormal activity.  Surprisingly, homeostatic mechanisms that regulate circuit output have mainly been demonstrated during artificial and/or pathological perturbations.  Natural, physiological scenarios that activate these stabilizing mechanisms in neural networks of mature animals remain elusive.  To establish the extent to which a naturally inactive circuit engages mechanisms of homeostatic plasticity, we utilized the respiratory motor circuit in bullfrogs that normally remains inactive for several months during the winter...
September 15, 2017: ELife
https://www.readbyqxmd.com/read/28914491/nirs-type-denitrifying-bacterial-assemblages-respond-to-environmental-conditions-of-a-shallow-estuary
#20
Jessica A Lisa, Amal Jayakumar, Bess B Ward, Bongkeun Song
Molecular analysis of dissimilatory nitrite reductase genes (nirS) was conducted using a customized microarray containing 165 nirS probes (archetypes) to identify members of sedimentary denitrifying communities. The goal of this study was to examine denitrifying community responses to changing environmental variables over spatial and temporal scales in the New River Estuary (NRE), NC, USA. Multivariate statistical analyses revealed three denitrifier assemblages and uncovered "generalist" and "specialist" archetypes based on the distribution of archetypes within these assemblages...
September 15, 2017: Environmental Microbiology Reports
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