Relationship between respiratory heat loss, panting rate and body temperature in conscious ducks under heat stress

1982 ◽  
Vol 394 (S1) ◽  
pp. R37-R37 ◽  
Author(s):  
Elisabeth Geisthövel ◽  
Eckhart Simon
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Heat Loss ◽  
Respiratory Heat Loss

scholarly journals Brain Cooling: An Economy Mode of Temperature Regulation in Artiodactyls

Physiology ◽  
1998 ◽  
Vol 13 (6) ◽  
pp. 281-286 ◽  
Author(s):  
Claus Jessen
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Heat Loss ◽  
Temperature Regulation ◽  
Thermal Damage ◽  
Brain Temperature ◽  
Brain Cooling ◽  
Selective Brain Cooling ◽  
Free Ranging ◽  
The Brain

Artiodactyls employ selective brain cooling (SBC) regularly during experimental hyperthermia. In free-ranging antelopes, however, SBC often was present when body temperature was low but absent when brain temperature was near 42°C. The primary effect of SBC is to adjust the activity of the heat loss mechanisms to the magnitude of the heat stress rather than to the protection of the brain from thermal damage.

Comparison of the effect of isopropyl alcohol and chlorhexidine solution rinses on body temperature of female cats undergoing sterilization surgery

2021 ◽  
pp. 1098612X2097956
Author(s):  
Rachael E Kreisler ◽  
Michelle L Douglas ◽  
Karissa N Harder
Keyword(s):  
Body Temperature ◽  
Heat Loss ◽  
Isopropyl Alcohol ◽  
Body Condition Score ◽  
High Volume ◽  
Veterinary Students ◽  
Reversal Agents ◽  
Duration Of Surgery ◽  
Chlorhexidine Solution ◽  
Recovery Temperature

Objectives Isopropyl alcohol 70% as a rinse agent for chlorhexidine scrub has been shown to decrease body temperature more quickly than chlorhexidine solution in mice prepared aseptically prior to surgery. For this reason, some high-quality, high-volume (HQHV) surgical sterilization clinics use chlorhexidine solution rather than alcohol. We sought to determine if temperature upon entry to recovery, heat loss per kg and rate of temperature decline during surgery were different between cats rinsed with chlorhexidine solution vs 70% isopropyl alcohol following surgical scrub, and if there were significant predictors of recovery temperature. Methods Female cats admitted for surgery to trap–neuter–return (TNR) clinics at a veterinary college were assigned chlorhexidine solution or alcohol rinse agents via block randomization. Veterinary students and veterinarians performed spay surgeries using HQHV techniques. In recovery, heat support and reversal agents were available for cats with a low body temperature or that were slow to recover. Baseline values, outcome variables and duration of each stage (preparation, surgery, recovery) were assessed using Wilcoxon rank-sum and t-tests. Recovery temperature was evaluated using random effects multiple linear regression. Results The recovery temperature, heat loss per kg, heat loss per min, need for reversal and need for heat support in recovery were not significantly different between rinse groups. Weight <2.3 kg, body condition score <4, duration of surgery and postinduction temperature were predictors of recovery temperature. The rate of heat loss in the first 30 mins of surgery was slightly lower for cats in the alcohol rinse group and the recovery duration was shorter for cats weighing less <2.3 kg in the alcohol rinse group. Conclusions and relevance There were no clinically meaningful differences in body temperature between chlorhexidine and alcohol rinses. Both chlorhexidine solution and isopropyl alcohol 70% are appropriate rinse agents for aseptic preparation of feline spay surgeries.

scholarly journals Wind Velocity as it Affects Body Temperature, Water Consumption and Feed Consumption During Heat Stress of Roosters

1971 ◽  
Vol 50 (5) ◽  
pp. 1535-1537 ◽  
Author(s):  
M.A. Boone ◽  
B.L. Hughes
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Wind Velocity ◽  
Water Consumption ◽  
Feed Consumption ◽  
Temperature Water

scholarly journals Heat Stress and Cardiovascular, Hormonal, and Heat Shock Proteins in Humans

2012 ◽  
Vol 47 (2) ◽  
pp. 184-190 ◽  
Author(s):  
Masaki Iguchi ◽  
Andrew E. Littmann ◽  
Shuo-Hsiu Chang ◽  
Lydia A. Wester ◽  
Jane S. Knipper ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heat Stress ◽  
Heat Shock ◽  
Body Temperature ◽  
Controlled Trial ◽  
Whole Body ◽  
Cord Injury ◽  
Whole Body Heat Stress ◽  
Body Heat

Context: Conditions such as osteoarthritis, obesity, and spinal cord injury limit the ability of patients to exercise, preventing them from experiencing many well-documented physiologic stressors. Recent evidence indicates that some of these stressors might derive from exercise-induced body temperature increases. Objective: To determine whether whole-body heat stress without exercise triggers cardiovascular, hormonal, and extra-cellular protein responses of exercise. Design: Randomized controlled trial. Setting: University research laboratory. Patients or Other Participants: Twenty-five young, healthy adults (13 men, 12 women; age = 22.1 ± 2.4 years, height = 175.2 ± 11.6 cm, mass = 69.4 ± 14.8 kg, body mass index = 22.6 ± 4.0) volunteered. Intervention(s): Participants sat in a heat stress chamber with heat (73°C) and without heat (26°C) stress for 30 minutes on separate days. We obtained blood samples from a subset of 13 participants (7 men, 6 women) before and after exposure to heat stress. Main Outcome Measure(s): Extracellular heat shock protein (HSP72) and catecholamine plasma concentration, heart rate, blood pressure, and heat perception. Results: After 30 minutes of heat stress, body temperature measured via rectal sensor increased by 0.8°C. Heart rate increased linearly to 131.4 ± 22.4 beats per minute (F6,24 = 186, P &lt; .001) and systolic and diastolic blood pressure decreased by 16 mm Hg (F6,24 = 10.1, P &lt; .001) and 5 mm Hg (F6,24 = 5.4, P &lt; .001), respectively. Norepinephrine (F1,12 = 12.1, P = .004) and prolactin (F1,12 = 30.2, P &lt; .001) increased in the plasma (58% and 285%, respectively) (P &lt; .05). The HSP72 (F1,12 = 44.7, P &lt; .001) level increased with heat stress by 48.7% ± 53.9%. No cardiovascular or blood variables showed changes during the control trials (quiet sitting in the heat chamber with no heat stress), resulting in differences between heat and control trials. Conclusions: We found that whole-body heat stress triggers some of the physiologic responses observed with exercise. Future studies are necessary to investigate whether carefully prescribed heat stress constitutes a method to augment or supplement exercise.

The comparative performance of tropical crossbred and local shorthorn beef cattle on native pasture at Katherine, NT

1967 ◽  
Vol 7 (26) ◽  
pp. 217 ◽  
Author(s):  
MJT Norman
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Peanut Meal ◽  
Average Weight ◽  
Wet Season ◽  
Comparative Performance ◽  
Native Pasture ◽  
Weight Gains ◽  
Adaptation To Heat ◽  
Dressing Percentage

The liveweight performance and carcase characteristics of Brahman x Hereford, Africander x Hereford and Africander x Shorthorn F, crossbred spayed heifers were compared with those of local Shorthorn spayed heifers on native pasture at Katherine, N.T., between 1962 and 1965. The breed groups were divided for planes of winter nutrition, viz., with and without 2 lb a day of peanut meal from early June until the start of the wet season. Without supplement, the average weight gains of B x H, A x H, A x S, and Shorthorn cattle between June 1962 and May 1965 were 0.49, 0.37, 0.36, and 0.23 lb a day respectively. With supplement, cattle reached slaughter weight a year earlier ; the average weight gains of B x H, A x H, and Shorthorn cattle between June 1962 and May 1964 were 0.61, 0.63, and 0.50 lb a day respectively. (There was no A x S supplemented group). Without supplement, the dressing percentage and estimated proportion of fat of B x H cattle was higher and the estimated proportion of muscle and bone lower than those of other breeds. With supplement, there were no significant differences in dressing percentage or carcase composition between breeds. Measurements made of thermoregulatory attributes indicated that the local Shorthorn cattle, through body temperature control, showed adaptation to heat stress.

Respiratory water and heat loss of the black duck during flight at different ambient temperatures

1971 ◽  
Vol 49 (5) ◽  
pp. 767-774 ◽  
Author(s):  
M. Berger ◽  
J. S. Hart ◽  
O. Z. Roy
Keyword(s):  
Heat Loss ◽  
Water Loss ◽  
Pulmonary Ventilation ◽  
Evaporative Heat Loss ◽  
Total Heat Loss ◽  
Ambient Temperatures ◽  
Black Duck ◽  
Respiratory Heat Loss ◽  
Metabolic Water ◽  
Expired Air

Pulmonary ventilation and temperature of expired air and of the respiratory passages has been measured by telemetry during flight in the black duck (Anas rubripes) and the respiratory water and heat loss has been calculated.During flight, temperature of expired air was higher than at rest and decreased with decreasing ambient temperatures. Accordingly, respiratory water loss as well as evaporative heat loss decreased at low ambient temperatures, whereas heat loss by warming of the inspired air increased. The data indicated respiratory water loss exceeded metabolic water production except at very low ambient temperatures. In the range between −16 °C to +19 °C, the total respiratory heat loss was fairly constant and amounted to 19% of the heat production. Evidence for the independence of total heat loss and production from changes in ambient temperature during flight is discussed.

Differences in body temperature, cell viability, and HSP-70 concentrations between Pelibuey and Suffolk sheep under heat stress

2013 ◽  
Vol 45 (8) ◽  
pp. 1691-1696 ◽  
Author(s):  
Rosita Denny Romero ◽  
Arnulfo Montero Pardo ◽  
Hugo Horacio Montaldo ◽  
Ana Delia Rodríguez ◽  
Joel Hernández Cerón
Keyword(s):  
Heat Stress ◽  
Body Temperature ◽  
Cell Viability ◽  
Hsp 70 ◽  
Suffolk Sheep
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