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https://www.readbyqxmd.com/read/28214881/attenuation-of-low-ambient-temperature-induced-myocardial-hypertrophy-by-atorvastatin-via-promoting-bcl-2-expression
#1
Jing Liang, Kun Yin, Xuefeng Cao, Zhenbo Han, Qi Huang, Lai Zhang, Wenya Ma, Fengzhi Ding, Chongwei Bi, Dan Feng, Zhenwei Pan, Yu Liu
BACKGROUND/AIMS: It is well documented that myocardial hypertrophy is associated with low ambient temperature. Atorvastatin (Atv) has been shown to protect against atherosclerosis, cardiac fibrosis, ischemia/reperfusion injury, etc. In this study, we aim to determine whether atorvastatin is effective in the treatment of myocardial hypertrophy induced by cold exposure and to shed light on underlying mechanism. METHODS: The mice aged 4-week were randomized to Control (Ctl) group (raised at room temperature), Cold group (raised at 3-5ºC) and Atv treatment group (raised at 3-5ºC followed by 10mg/kg/day Atv infusion)...
January 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28210860/a-heat-vulnerability-index-to-improve-urban-public-health-management-in-san-juan-puerto-rico
#2
Pablo Méndez-Lázaro, Frank E Muller-Karger, Daniel Otis, Matthew J McCarthy, Ernesto Rodríguez
Increased frequency and length of high heat episodes are leading to more cardiovascular issues and asthmatic responses among the population of San Juan, the capital of the island of Puerto Rico, USA. An urban heat island effect, which leads to foci of higher temperatures in some urban areas, can raise heat-related mortality. The objective of this research is to map the risk of high temperature in particular locations by creating heat maps of the city of San Juan. The heat vulnerability index (HVI) maps were developed using images collected by satellite-based remote sensing combined with census data...
February 17, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28208592/relationship-between-deck-level-body-surface-temperature-and-carcass-damages-in-italian-heavy-pigs-after-short-journeys-at-different-unloading-environmental-conditions
#3
Agnese Arduini, Veronica Redaelli, Fabio Luzi, Stefania Dall'Olio, Vincenzo Pace, Leonardo Nanni Costa
In order to evaluate the relationships between deck level, body surface temperature and carcass damages after a short journey (30 min), 10 deliveries of Italian heavy pigs, including a total of 1400 animals from one farm, were examined. Within 5 min after the arrival at the abattoir, the vehicles were unloaded. Environmental temperature and relative humidity were recorded and a Temperature Humidity Index (THI) was calculated. After unloading, maximum temperatures of dorsal and ocular regions were measured by a thermal camera on groups of pigs from each of the unloaded decks...
February 10, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/28207294/validity-of-core-temperature-measurements-at-3-rectal-depths-during-rest-exercise-cold-water-immersion-and-recovery
#4
Kevin C Miller, Lexie E Hughes, Blaine C Long, William M Adams, Douglas J Casa
CONTEXT:  No evidence-based recommendation exists regarding how far clinicians should insert a rectal thermistor to obtain the most valid estimate of core temperature. Knowing the validity of temperatures at different rectal depths has implications for exertional heat-stroke (EHS) management. OBJECTIVE:  To determine whether rectal temperature (Trec) taken at 4 cm, 10 cm, or 15 cm from the anal sphincter provides the most valid estimate of core temperature (as determined by esophageal temperature [Teso]) during similar stressors an athlete with EHS may experience...
February 16, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28198757/effect-of-temperature-on-heart-rate-variability-in-neonatal-icu-patients-with-hypoxic-ischemic-encephalopathy
#5
An N Massaro, Heather E Campbell, Marina Metzler, Tareq Al-Shargabi, Yunfei Wang, Adre du Plessis, Rathinaswamy B Govindan
OBJECTIVE: To determine whether measures of heart rate variability are related to changes in temperature during rewarming after therapeutic hypothermia for hypoxic-ischemic encephalopathy. DESIGN: Prospective observational study. SETTING: Level 4 neonatal ICU in a free-standing academic children's hospital. PATIENTS: Forty-four infants with moderate to severe hypoxic-ischemic encephalopathy treated with therapeutic hypothermia...
February 14, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28183862/the-mechanisms-underlying-the-muscle-metaboreflex-modulation-of-sweating-and-cutaneous-blood-flow-in-passively-heated-humans
#6
Baies Haqani, Naoto Fujii, Narihiko Kondo, Glen P Kenny
Metaboreceptors can modulate cutaneous blood flow and sweating during heat stress but the mechanisms remain unknown. Fourteen participants (31 ± 13 years) performed 1-min bout of isometric handgrip (IHG) exercise at 60% of their maximal voluntary contraction followed by a 3-min occlusion (OCC), each separated by 10 min, initially under low (LHS, to activate sweating without changes in core temperature) and high (HHS, whole-body heating to a core temperature increase of 1.0°C) heat stress conditions. Cutaneous vascular conductance (CVC) and sweat rate were measured continuously at four forearm skin sites perfused with 1) lactated Ringer's solution (Control), 2) 10 mmol L-NAME [inhibits nitric oxide synthase (NOS)], 3) 10 mmol Ketorolac [inhibits cyclooxygenase (COX)], or 4) 4 mmol theophylline (THEO; inhibits adenosine receptors)...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28183661/a-microstructural-study-of-the-degradation-and-calcium-release-from-hydroxyapatite-calcium-oxide-ceramics-made-by-infiltration
#7
Qinghao Zhang, Eva Schmelzer, Jörg C Gerlach, Ian Nettleship
Hydroxyapatite pellets, partially densified in a low-temperature heat treatment, were infiltrated with calcium nitrate solution followed by in-situ precipitation of Ca(OH)2 and CaCO3. The infiltrated bodies were then densified to high relative density and the calcium carbonate transformed to calcium oxide during sintering and resulted in biphasic hydroxyapatite-CaO ceramics. This work investigated the influence of the infiltration on surface morphology, weight change, and microstructural-level degradation caused by exposure to saline at pH=7...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28177396/growth-heterogeneity-in-broiler-breeder-pullets-is-settled-before-the-onset-of-feed-restriction-but-is-not-predicted-by-size-at-hatch
#8
C Lindholm, J Jönsson, A Calais, A Middelkoop, N Yngwe, E Berndtson, J J Lees, E Hult, J Altimiras
Uniform growth is a desirable trait in all large-scale animal production systems because it simplifies animal management and increases profitability. In parental broiler flocks, so-called broiler breeders, low growth uniformity is largely attributed to the feed competition that arises from quantitatively restricted feeding. As feed restriction is crucial to maintaining healthy and fertile breeders, several practices for reducing feed competition and the associated growth heterogeneity have been suggested and range from nutrient dilution by increasing fiber content in feed to intermittent fasting with increased portion size ("skip a day"), but no practice appears to be entirely effective...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28177296/a-first-principles-model-for-anomalous-segregation-in-dilute-ternary-tungsten-rhenium-vacancy-alloys
#9
Jan Wrobel, Duc Nguyen-Manh, Sergei Dudarev, Krzysztof Kurzydłowski
The occurrence of segregation in dilute alloys under irradiation is a highly unusual phenomenon that has recently attracted attention, simulated by the interest in the fundamental properties of alloys as well as by applications. The fact that solute atoms segregate in alloys that, according to equilibrium thermodynamics, should exhibit full solubility, has significant practical implications, as the formation of precipitates strongly affects physical and mechanical properties. A lattice Hamiltonian model, generalizing so-called "ABV" Ising model and including collective many-body inter-atomic interactions, has been developed to treat rhenium solute atoms and vacancies in tungsten as components of a ternary alloy...
February 8, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28176192/effect-of-the-up-front-heat-treatment-of-gelatin-particles-dispersed-in-calcium-phosphate-cements-on-the-in-vivo-material-resorption-and-concomitant-bone-formation
#10
Shoko Yamamoto, Yuta Matsushima, Yoshitaka Kanayama, Azusa Seki, Haruya Honda, Hidero Unuma, Yasuo Sakai
Calcium phosphate cements (CPCs), consisting of a mixture of calcium phosphate powders and setting liquid, have been widely used in orthopedic applications. One of the drawbacks of CPCs is their poor resorbability in the living body, which hinders substitution with natural bones. One of the strategies to facilitate the resorption of CPCs is the incorporation of bioresorbable or water-soluble pore-generating particles (porogens), such as gelatin, in the CPC matrices. In spite of numerous reports, however, little is known about the effect of the dissolution/resorption rate of the porogens on concomitant bone regeneration...
March 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28161689/bioactivity-cytocompatibility-and-thermal-properties-of-experimental-bioglass-reinforced-composites-as-potential-root-canal-filling-materials
#11
Raghad Abdulrazzaq Alhashimi, Francesco Mannocci, Salvatore Sauro
To evaluate the bioactivity and the cytocompatibility of experimental Bioglass-reinforced polyethylene-based root-canal filling materials. The thermal properties of the experimental materials were also evaluated using differential scanning calorimetry, while their radiopacity was assessed using a grey-scale value (GSV) aluminium step wedge and a phosphor plate digital system. Bioglass 45S5 (BAG), polyethylene and Strontium oxide (SrO) were used to create tailored composite fibres. The filler distribution within the composites was assessed using SEM, while their bioactivity was evaluated through infrared spectroscopy (FTIR) after storage in simulated body fluid (SBF)...
January 15, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28161500/gold-nanocages-decorated-biocompatible-amine-functionalized-graphene-as-an-efficient-dopamine-sensor-platform
#12
Sahar Daemi, Ali Akbar Ashkarran, Ali Bahari, Shahram Ghasemi
Nanocomposite of gold nanocages and chemically modified graphene oxide (GNCs/CMG) was synthesized in N,N-dimethylformamide (DMF) for sensitive detection of dopamine (DA). DA is widely spread in central nervous system which can regulates essential body functions like movement and emotional behaviour. In this regard sensitive and fast detection of DA level in human body is still challenging considering its interference with other biomolecules in biological samples. CMG was synthesized through amine modification of graphene oxide (GO) with DMF at relatively high temperature followed by attachment of GNCs, fabricated using a galvanic replacement between silver nanocubes and HAuCl4 solution in the DMF...
May 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28159269/characterization-of-lentinus-edodes-%C3%AE-glucan-influencing-the-in-vitro-starch-digestibility-of-wheat-starch-gel
#13
Haining Zhuang, Zhongqiu Chen, Tao Feng, Yan Yang, Jingsong Zhang, Guodong Liu, Zhaofeng Li, Ran Ye
Lentinus edodes β-glucan (abbreviated LEBG) was prepared from fruiting bodies of Lentinus edodes. The average molecular weight (Mw) and polydispersity index (Mw/Mn) of LEBG were measured to be 1.868×10(6)g/mol and 1.007, respectively. In addition, the monosaccharide composition of LEBG was composed of arabinose, galactose, glucose, xylose, mannose with a molar ratio of 5:11:18:644:16. After adding LEBG, both G' and G″ of starch gel increased. This is mainly because the connecting points between the molecular chains of LEBG and starch formed so that gel network structures were enhanced...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28150692/ultrahigh-charpy-impact-toughness-450j-achieved-in-high-strength-ferrite-martensite-laminated-steels
#14
Wenquan Cao, Mingda Zhang, Chongxiang Huang, Shuyang Xiao, Han Dong, Yuqing Weng
Strength and toughness are a couple of paradox as similar as strength-ductility trade-off in homogenous materials, body-centered-cubic steels in particular. Here we report a simple way to get ultrahigh toughness without sacrificing strength. By simple alloying design and hot rolling the 5Mn3Al steels in ferrite/austenite dual phase temperature region, we obtain a series of ferrite/martensite laminated steels that show up-to 400-450J Charpy V-notch impact energy combined with a tensile strength as high as 1...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28145422/proximate-causes-for-diet-induced-obesity-in-laboratory-mice-a-case-study
#15
REVIEW
C Kless, N Rink, J Rozman, M Klingenspor
BACKGROUND/OBJECTIVES: Detailed protocols and recommendations for the assessment of energy balance have been provided to address the problems associated with different body mass and body composition as apparent for mouse models in obesity research. Here, we applied these guidelines to investigate energy balance in two inbred mouse strains with contrasting susceptibilities for diet-induced obesity (DIO). Mice of the AKR/J strain are highly susceptible, whereas the SWR/J mice are almost completely resistant...
February 1, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28143947/saccharomyces-cerevisiae-flo1-gene-demonstrates-genetic-linkage-to-increased-fermentation-rate-at-low-temperatures
#16
Rebecca C Deed, Bruno Fedrizzi, Richard C Gardner
Low fermentation temperatures are of importance to food and beverage industries working with Saccharomyces cerevisiae Therefore, the identification of genes demonstrating a positive impact on fermentation kinetics is of significant interest. A set of 121 mapped F1 progeny, derived from a cross between haploid strains BY4716, a derivative of the laboratory yeast S288C, and wine yeast RM11-1a, were fermented in New Zealand Sauvignon Blanc grape juice at 12.5 °C. Analyses of five key fermentation kinetic parameters amongst the F1 progeny identified a quantitative trait locus on chromosome I with a significant degree of linkage to maximal fermentation rate (Vmax) at low temperature...
January 30, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28141620/cold-water-mediates-greater-reductions-in-limb-blood-flow-than-whole-body-cryotherapy
#17
Chris Mawhinney, David A Low, Helen Jones, Daniel J Green, Joseph T Costello, Warren Gregson
PURPOSE: Cold-water immersion (CWI) and whole body cryotherapy (WBC) are widely used recovery methods in an attempt to limit exercise-induced muscle damage, soreness and functional deficits after strenuous exercise. The aim of this study was to compare the effects of ecologically-valid CWI and WBC protocols on post-exercise lower limb thermoregulatory, femoral artery and cutaneous blood flow responses. METHODS: Ten males completed a continuous cycle exercise protocol at 70% maximal oxygen uptake until a rectal temperature of 38°C was attained...
January 30, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28133747/on-the-potential-for-rf-heating-in-mri-to-affect-metabolic-rates-and-18-fdg-signal-in-pet-mr-simulations-of-long-duration-maximum-normal-mode-heating
#18
Giuseppe Carluccio, Yu-Shin Ding, Jean Logan, Christopher M Collins
PURPOSE: To examine the possibility that MR-induced RF power deposition (SAR) and the resulting effects on temperature-dependent metabolic rates or perfusion rates might affect observed 18FDG signal in PET/MR. METHODS: Using numerical simulations of the SAR, consequent temperature increase, effect on rates of metabolism or perfusion, and [18FDG] throughout the body, we simulated the potential effect of maximum-allowable whole-body SAR for the entire duration of an hour-long PET/MR scan on observed PET signal for two different 18FDG injection times: one hour before onset of imaging and concurrent with the beginning of imaging...
December 9, 2016: Medical Physics
https://www.readbyqxmd.com/read/28131916/low-concentration-of-uncouplers-of-oxidative-phosphorylation-decreases-the-tnf-induced-endothelial-permeability-and-lethality-in-mice
#19
Vlada V Zakharova, Olga Yu Pletjushkina, Ivan I Galkin, Roman A Zinovkin, Boris V Chernyak, Dmitri V Krysko, Claus Bachert, Olga Krysko, Vladimir P Skulachev, Ekaterina N Popova
Mitochondrial dysfunctions occur in many diseases linked to the systemic inflammatory response syndrome (SIRS). Mild uncoupling of oxidative phosphorylation is known to rescue model animals from pathologies related to mitochondrial dysfunctions and overproduction of reactive oxygen species (ROS). To study the potential of SIRS therapy by uncoupling, we tested protonophore dinitrophenol (DNP) and a free fatty acid (FFA) anion carrier, lipophilic cation dodecyltriphenylphosphonium (C12TPP) in mice and in vitro models of SIRS...
January 26, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28128911/emergency-percutaneous-nephrostomy-versus-emergency-percutaneous-nephrolithotomy-in-patients-with-sepsis-associated-with-large-uretero-pelvic-junction-stone-impaction-a-randomized-controlled-trial
#20
Chi-Sen Hsu, Chung-Jing Wang, Chien-Hsing Chang, Po-Chao Tsai, Hung-Wen Chen, Yi-Chun Su
INTRODUCTION: A randomized trial was conducted prospectively to evaluate the efficacy, related complications, and convalescence of emergency percutaneous nephrolithotomy compared to percutaneous nephrostomy for decompression of the collecting system in cases of sepsis associated with large uretero-pelvic junction stone impaction. MATERIALS AND METHODS: The inclusion criteria included a WBC count of 10.000/mm3 or more and/or a temperature of 38°C or higher. Besides, all enrolled patients should maintain stable hemodynamic status and proper organ perfusions...
January 27, 2017: International Braz J Urol: Official Journal of the Brazilian Society of Urology
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