Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"thermoneutral"”.
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Determination of the thermoneutral zone in young males and females
To determine the thermoneutral zone (TNZ) in young men and women, 14 women and 6 men between the ages of 18 and 37 were studied. Rectal temperature, skin temperature (seven sites), heart rate, blood pressure, VO2 (ml/kg/min), and a perceived comfort index were measured while resting for 2 hours in …
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Thermoneutral Housing Did Not Impact the Combined Effects of External Loading and Raloxifene on Bone Morphology and Mechanical Properties in Growing Female Mice
… to a strain level of 2050µε and were housed in thermoneutral conditions (32°C) for 6 weeks. We investigated bone morphology through microcomputed tomography (µCT) and mechanical properties via four-point bending and fracture toughness testing. Results indicated a combined improvement by external …
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Physiological consequences of exposure to heat stress and the mycotoxin zearalenone
… The first experiment compared the effects of thermoneutral, thermoneutral + hyperinsulinemic-hypoglycemic clamp (HHC), environmental heat stress, and heat stress + euglycemic clamp (EC) on milk production, milk components, and circulating glucose concentrations. Milk production, as expected, …
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Effects of Environmental Temperature on Sleep and Waking in Normal Rats and Rats With Basal Forebrain Damage
… stress--animals spend the most time asleep at thermoneutral temperatures, and amounts of sleep decline in the heat and in the cold. Amounts of rapid-eye-movement (REM) sleep in normal rats vary within the thermoneutral zone defined by minimal metabolic rate--25 to 31(DEGREES)C--peaking toward …
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The effects of different thermal environments on performance of manual handling tasks.
… on consecutive weekdays in five environments: thermoneutral, 21 °C, 45% RH (17°C WBGT); warm-dry, 30°C, 25% RH (22°C WBGT); warm-humid, 30°C, 65% RH (27°C WBGT); hot-dry, 39°C, 22% RH (27°C WBGT); hot-humid, 38°C, 70% RH (34°C WBGT) and three lift …
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The time-course of physiological variation in rate function and acid-base disturbance in the domestic pig subjected to thermal stress
… variation was also monitored during a 48 hour thermoneutral recovery (25 $\pm$ 2$\sp\circ$C) period (TN).
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Metabolic and endocrine adaptations to heat stress in lactating dairy cows
… (PF) to the intake of HS group but housed in thermoneutral conditions, in order to eliminate the confounding factors result from differentiated feed intakes, showed that HS increased circulating insulin and decreased plasma non-esterified fatty acid (NEFA) in lactating cow, the opposite …
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The use of implantable microchips for body temperature collection in cattle
… devices correlate to RT in cattle exposed to thermoneutral and elevated environmental temperatures, with and without a lipopolysaccharide challenge, and in mature cattle during the periparturient phase (parturition and early lactation disease detection) and around the time of estrus. In the …
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Quantifying the Relationship of Bilateral Blood Flow in Glabrous Skin at Rest and During Sympathetic Perturbations
… via laser Doppler flowmetry, while at rest in a thermoneutral room for 20 minutes and in response to 4 randomized sympathetic perturbations (2 breath holds and 2 cold stimuli) while centrally vasodilated via heating of the back. Correlation coefficients while at thermoneutral rest were high (0.80 …
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Effects of gestational heat stress on the lactational performance of gilts and growth performance and carcass characteristics of second-generation offspring
… at slaughter compared to pigs gestated under thermoneutral conditions (gTN). The objectives of this study were to 1) determine whether gHS impacts the lactational performance of affected gilts (F1 generation), and 2) determine whether these effects of gHS are also evident in the next …
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Effect of Palm Temperature on Fatigue During High Intensity Bench Press Exercise
… volume in resistance trained subjects in a thermoneutral environment and that local palm heating will have no effect. METHODS: Sixteen male subjects (mean±SD, age = 26±6 yr, height = 178±7 cm, body mass = 81.5±11.3kg, 1RM Bench press = 123.5±12.6 kg, % body fat = 10.3±5.4%, weight training …
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Influência da treonina sobre o desempenho e a morfometria intestinal de frangos de corte submetidos a estresse por calor de 1 a 15 dias de idade
… factorial, considering two rearing temperatures (thermoneutral and heat stress) and two threonine levels (basal and high). Diets were formulated according to nutritional requirements considering basal and high threonine levels in the pre-initial (0.857% and 0.956%) and initial phases (0.764% and …
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Use of physiological and perceptual dimensions of clothing comfort to evaluate nonwoven protective fabrics through wear testing of limited-use coveralls
… performing moderate-intensity exercise in thermoneutral and hot, humid environments. Physiological responses included skin temperature, body temperature, heart rate, sweat rate, and fluid loss. Perceptual responses included moisture sensation, thermal sensation, Rating of Perceived …
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Effects of Supplemental Ascorbic Acid on Energy Conversion and Performance of the Domestic Fowl Exposed to High Ambient Temperatures
… in ad libitum fed birds maintained under thermoneutral conditions. Supplemental AA increased (7.8%) the percentage of whole carcass protein in 35-day-old birds. This was accompanied by a substantial reduction (4.3%) in the percentage of whole carcass lipid. Supplemental AA does not appear …
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Dissecting NAMPT Signaling Pathways in Beige Adipocyte Development, Impairment and Maintenance
… “whitening” during aging, overnutrition, and thermoneutrality. The NAD(^+) biosynthetic enzyme nicotinamide phosphoribosyltransferase (NAMPT) regulates cellular stress responses and immune–metabolic crosstalk, yet its roles in thermogenic adipocyte development, maintenance, and failure remain …
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Effect of glycerol hyperhydration before exercise in trained triathletes on endurance performance and cardiovascular and thermoregulatory responses
… cycling exercise at 65% VO[subscript 2] max in a thermoneutral climate, which could improve core temperature, but not HR. With respect to the endurance performance test, the comparison of the mean of each group reveals that glycerol hyperhydration did not increase time to exhaustion."--Résumé …
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Effects of fescue toxicosis and chronic heat stress on murine hepatic gene expression
… (E-) fescue seed for two wks under thermoneutral conditions. A two-stage ANOVA of microarray data identified thirty-six genes differentially expressed between mice fed E+ and E- diets. The E+ diet resulted in down-regulation of genes involved in sex-steroid pathway and in cholesterol …
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The effects of hydration status on markers of oxidative and cellular stress during prolonged exercise in hyperthermic environments
… a warm environment (DE-W), 3) euhydration in a thermoneutral environment (EU-T), and 4) dehydration in a thermoneutral environment (DE-T) (W: 33.9 ± 0.9°C; T: 23.0 ± 1.0°C). Whole blood oxidised glutathione (GSSG) increased significantly post exercise in dehydration trials only (DE-W: p < 0.01, …
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Periconceptional Heat Stress of Holstein Cows Affects Subsequent Production Parameters Measured During Adulthood
… the heat stress-conceieved (HSC) cows and thermoneutral-conceived (TNC) cows. National Dairy Herd Improvement Association data was obtained from Dairy Records Management Systems. Records (n =14,189,891) included cows born between 1977 and 2010 in FL, GA, SC, MS, LA, AL, and TX. Records were …
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