ADAPTATION OF WHITE MICE (MUS MUSCULUS) TO REPEATED COOLING

1967 ◽  
Vol 45 (3) ◽  
pp. 321-327 ◽  
Author(s):  
David M. Ogilvie
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
Cold Exposure ◽  
Mus Musculus ◽  
Room Temperature ◽  
The Body ◽  
Progressive Decrease

The effects, on the body temperature of white mice, of repeated short exposures to cold were investigated using two methods of restraint. Animals held in a flattened posture became hypothermic at room temperature, cooled more than five times as fast at −10 °C as mice that could adopt a heat-conserving posture, and continued to cool for some time after they were removed from the cold. With repeated tests, cooling at room temperature decreased, and an improvement in re warming ability was observed. In addition, with lightly restrained mice, the fall in rectal temperature during cold exposure showed a progressive decrease, a phenomenon not observed with severely restrained animals.

Effect of continuous cold exposure on nocturnal body temperatures of man

1959 ◽  
Vol 14 (1) ◽  
pp. 43-45 ◽  
Author(s):  
M. B. Kreider ◽  
P. F. Iampietro ◽  
E. R. Buskirk ◽  
David E. Bass
Keyword(s):  
Body Temperature ◽  
Cold Stress ◽  
Skin Temperature ◽  
Rectal Temperature ◽  
Cold Exposure ◽  
Control Period ◽  
Cold Period ◽  
Body Temperatures ◽  
Temperature Responses

Effects of continuous cold stress on 24-hour patterns of body temperature were studied in five men. Cold stress consisted in living at 15.6℃ (60℉) for 14 days wearing only shorts. The cold period was preceded and followed by 2 weeks at 26.7℃ (80℉). Activity (minimal) and diet were the same for all periods. One blanket was used at night. Rectal temperature (Tr) and skin temperature (Ts) were measured. Tr during sleep fell more rapidly and to lower values during cold exposure (35.6℃) than during the control period (36.1℃). Ts during sleep was slightly lower in the cold than in the control period; also, Ts did not exhibit the gradual drop characteristic of sleep in the control period. Comparison of Tr and Ts between early and later cold days revealed the following differences: a) nocturnal Tr fell to lower levels on the later cold days; b) nocturnal toe temperatures were 15℃ (27℉) higher on the later cold days. The arch temperatures followed the same pattern as the toes. No significant differences were found in daytime temperatures between early and later cold days. The data suggest that evidence for acclimatization to cold in terms of altered body temperature responses may be fruitfully sought in responses during rewarming and/or sleep. Submitted on September 19, 1958

V.—Observations on the Body Temperature of some Diving and Swimming Birds

1913 ◽  
Vol 32 ◽  
pp. 19-35 ◽  
Author(s):  
Sutherland Simpson
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
The Body ◽  
Orkney Islands ◽  
Cayuga Lake ◽  
Firth Of Forth

SUMMARYObservations were made on the body temperature of a large number of diving and swimming birds of eighteen different species in the Orkney Islands and Firth of Forth, Scotland, and on and around Cayuga Lake, N.Y., U.S.A., immediately after they were killed by shooting.1. In all the species examined, where the sex was determined, it was found that the rectal temperature of the male was slightly below that of the female.2. Of the orders examined the highest temperatures were found in the Longipennes and the lowest in the Tubinares. When arranged according to body temperature the series does not run parallel with the zoological series.In conclusion, I wish to express my indebtedness to Dr H. D. Reed and Dr A. H. Wright for help in identifying the specimens obtained from Cayuga Lake and the surrounding district.

Ontogeny of feeding controls in suckling and weanling rats

1979 ◽  
Vol 237 (3) ◽  
pp. R187-R191 ◽  
Author(s):  
S. J. Henning ◽  
S. S. Chang ◽  
E. G. Gisel
Keyword(s):  
Body Temperature ◽  
Room Temperature ◽  
Temporal Correlation ◽  
Maternal Deprivation ◽  
The Body ◽  
Foster Mother ◽  
Appetitive Behavior ◽  
Critical Effect ◽  
Rat Pups ◽  
Weanling Rats

To rationalize conflicting data in the literature, the latency of attachment of fed and fasted rat pups to the nipples of their anesthetized mother has been studied at various postnatal ages. At 10 and 14 days of age, the mode of fasting had a critical effect on the results: pups fasted in a 30 degrees C incubator had shorter attachment latencies than fed pups, whereas when pups were fasted in a 34 degrees C incubator or with a nonlactating foster mother at room temperature, their latencies were no different from those of fed pups. Thus maternal deprivation has an important influence on attachment latencies, unless other steps are taken to maintain the body temperature of fasted pups. When this variable is controlled, it is apparent that at 10 and 14 days of age, the feeding behavior of rat pups is not related to nutritional status. In contrast, from 17 days onward, latencies of fed pups were significantly longer than those of faster pups, regardless of the mode of fasting. This appearance of appetitive behavior during the 3rd postnatal wk was shown to have a temporal correlation with the beginning of weaning, as measured by the appearance of chow in the stomachs.

XI.—An Investigation into the Effects of Seasonal Changes on Body Temperature

1913 ◽  
Vol 32 ◽  
pp. 110-135 ◽  
Author(s):  
Sutherland Simpson
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
Egg Production ◽  
Weather Conditions ◽  
Barometric Pressure ◽  
Temperature Curve ◽  
The Body ◽  
The Mean ◽  
One Year ◽  
June July

SummaryMonthly observations, extending over one year, were made on the rectal temperature of 114 domestic fowls (Gallus gallus, ♀) and records from forty-one of these were obtained for two years. Six different breeds were used, each located in a separate pen, all under similar conditions, and the mean temperatures for each group were plotted out to form an annual temperature curve. It was found that—1. The lowest temperatures occur in December, January, and February, and the highest in June, July, and August, corresponding in a general way with the temperature of the external air.2. Barometric pressure does not appear to have any influence on the body temperature of the hen.3. The curve of egg-production does not coincide with the annual temperature curve, the former reaching its highest level in April and May, the latter in June, July, and August.If we compare the mean rectal temperature at two periods of the year when the external or weather conditions are approximately the same (April-May and September-October), but when the vitality of the birds, as indicated by the curve of egg-production, moulting, etc., is at a maximum and minimum respectively, we find that the figures are practically identical. This would seem to show that cyclical bodily changes have little effect on body temperature as compared with outside influences.

A Non-Invasive Body Temperature Measurements in Cow using IR Thermometry

2021 ◽  
Author(s):  
S MURUGESWARI ◽  
Kalpana Murugan ◽  
R. Sundaraprem
Keyword(s):  
Body Temperature ◽  
Rectal Temperature ◽  
Body Surface ◽  
The Body ◽  
Temperature Measurements ◽  
Extreme Temperatures ◽  
Non Invasive ◽  
Surface Temperatures ◽  
Abdominal Region ◽  
Measuring Surface

Abstract This research deals with continuous surface body temperature measurements in cow using IR based thermometry. Body surface temperatures were estimated contactless utilizing recordings from an IR thermometry fixed at a specific region in the cow. The body surface temperatures were dissected reflectively at two regions: the rectal region (behind the tail) and abdominal region (nearer the stomach) in the cow. The traditional invasive rectal temperature filled in as a kind of perspective temperature and was estimated with a computerized thermometer at the comparing time point. An aggregate of ten cows (Redsindhi, HF cross, Kangayam ) was inspected. The normal most extreme temperatures of the territory of the rectal (mean ± SD: 38.69 ± 0.5°C) and the abdominal region (38.4 ± 0.51°C). The temperatures of these regions in the cow were 95% accurate than the traditional invasive rectal temperature measurements. Notwithstanding, the most extreme temperatures as estimated utilizing IR thermometry expanded with an expansion in cow rectal temperature. These temperature readings are then been communicate to the remote server for continuous monitoring of the condition of cows. This communication is carried out by using Bluetooth/Wifi medium. Since this framework comes out with a non-invasive fashion measuring surface body temperature, will be an alternate way of taking a reading of temperature rather than computing the internal body temperature in an invasive fashion. Subsequently, this IR thermometry shows potential as a marker for consistent temperature estimations in cows.

Modeling of Temperature Measurement Using Newton’s Law of Cooling

2016 ◽  
pp. 3576-3580
Author(s):  
Alalibo Thompson Ngiangia ◽  
C. P. Ononugbo
Keyword(s):  
Body Temperature ◽  
Temperature Measurement ◽  
Room Temperature ◽  
Initial Conditions ◽  
The Body ◽  
Port Harcourt ◽  
Physics Department

The room temperature of Physics Department University of Port Harcourt at 7am was taken and the body temperature of the researcher was also taken at that time. Temperature of the body was taken at regular intervals and compared with that obtained usingNewton’s law of cooling with given initial conditions. Comparison showed that it fits well with minimal approximation.

Influence of water temperature on heart rate and rectal temperature of swimming rats

1964 ◽  
Vol 207 (5) ◽  
pp. 1073-1076 ◽  
Author(s):  
Mary Ann Baker ◽  
Steven M. Horvath
Keyword(s):  
Heart Rate ◽  
Body Temperature ◽  
Rectal Temperature ◽  
Cold Water ◽  
Submaximal Exercise ◽  
The Body ◽  
Small Animals ◽  
Influence Of Water ◽  
Relationship Of ◽  
The Relationship

The heart rate and rectal temperature of 12 adult male hooded rats were studied during 10-min swims in water of 37, 20, and 42 C. Both the heart rate and the rectal temperature stabilized in water of 37 C, suggesting that swimming in thermoneutral water is a submaximal exercise for rats. In water of 20 C, rectal temperature and heart rate of swimming animals fell exponentially to 28 C and 251 beats/min, respectively. The relationship of heart rate to rectal temperature in these swimming, cooling animals was not different from that reported in the literature for unanesthetized, inactive, hypothermic rats. It appeared that exercise had no effect on the heart rate of rats when the body temperature was dropping. In water of 42 C the rectal temperature rose exponentially to 42.2 C. The heart rate rose to 521 beats/min at the 8th min of swimming and remained stable thereafter. It is suggested that inadequate cardiac output resulting from severe changes in body temperature may be one factor which limits swimming capacity of small animals in hot and cold water.

Tolerance of cooled animals to acute hypoxia during rewarming

1959 ◽  
Vol 197 (6) ◽  
pp. 1357-1358 ◽  
Author(s):  
J. Davidović ◽  
Ines Wesley
Keyword(s):  
Survival Rate ◽  
Body Temperature ◽  
Rectal Temperature ◽  
Acute Hypoxia ◽  
The Body ◽  
Simulated Altitude ◽  
Closed Vessel ◽  
Interesting Phenomenon ◽  
Hypoxic Tolerance ◽  
Tolerance To Hypoxia

Rats cooled to a rectal temperature of 20°C were permitted to rewarm at a simulated altitude of 11,500 m. A greater survival rate was observed in animals so treated than in controls not previously exposed to hypothermia. The loss of hypoxic tolerance was more pronounced within the range of 28°–36°C than in the range of 22°–28°C. The depth of cooling has a notable influence on the tolerance to hypoxia during rewarming when the body temperature of 33°C is reached. Thus far, the most resistant were rats cooled by the closed vessel technique to 18°C and those cooled by immersion to 22°C. The mechanism of this interesting phenomenon is unknown.

scholarly journals PSX-13 Correlation between superficial body temperatures measured with an infrared thermometer in alpacas

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 463-464
Author(s):  
jorge L Vilela ◽  
Jorge Ascue ◽  
Milagros Callan ◽  
Gianella Goycochea ◽  
Andrea Jauregui ◽  
...  
Keyword(s):  
Body Temperature ◽  
Temperature Measurement ◽  
Rectal Temperature ◽  
Animal Health ◽  
Outer Zone ◽  
The Body ◽  
Body Temperatures ◽  
Infrared Thermometer ◽  
Technological Unit ◽  
Body Temperature Measurement

Abstract The temperature measurement is essential during the physical examination since it helps to detect abnormalities on animal health. In addition, it should be done in the shortest possible time to avoid stress. The objective of this research is to calculate the correlation between rectal temperature and the superficial body temperature by means of a digital infrared thermometer. Ten alpacas huacaya from the center of development Alpaquero (CEDAT-DESCOSUR), located in Arequipa region at 4,365 m.a.s.l, and eight alpacas huacaya of the zootechnical and technological unit (UZYT) of the Universidad Cientifica del Sur, located in Lima at 0 m.a.s.l., were used. Rectal temperature measurement (RECTAL) was done with a veterinary clinical thermometer for one minute. Superficial body temperature measurement was conducted with infrared thermometer model CENTER 350®, at a distance of between 20 to 25 cm. Six measuring points were established by infrared thermometer: the outer zone of the nose (ON), the inner zone of the nose (IN), the extreme zone of ear (EE), middle zone of ear (ME), lower zone of the ear (LE) and the belly of the animal (BE). Rectal temperatures were measured at the same time as superficial body temperatures. Pearson’s correlation coefficient and graphs were calculated using an R software package called “CORRGRAM.” The results are presented in Table 1. Mean and deviation standard for rectal temperature from CEDAT-DESCOSUR and UZYT were 38.03 ± 0.37 and 37.46 ± 0.35 ° C, respectively. The results showed that there is a major correlation between rectal temperature and the temperature of the middle of the ear and the outer zone of the nose. In conclusion, there is a highly significant correlation between rectal temperature and superficial body temperature in some areas of the body, being an alternative option for the prediction of temperature in alpacas.

Effects of adrenaline and noradrenaline on the heat production of warm- and cold-acclimated sheep

1981 ◽  
Vol 59 (9) ◽  
pp. 985-993 ◽  
Author(s):  
A. D. Graham ◽  
R. J. Christopherson
Keyword(s):  
Heart Rate ◽  
Body Temperature ◽  
Dose Rate ◽  
Respiration Rate ◽  
Rectal Temperature ◽  
Heat Production ◽  
Cold Exposure ◽  
Gas Analysis ◽  
Dose Rates ◽  
Temperature Responses

The heat production (HP), heart rate (HR), respiration rate, rumen motility, and body temperature responses to 2.5-h adrenaline (A) and noradrenaline (NA) intrajugular infusions at 0.00, 0.15, 0.30, 0.60, and 0.90 μg∙kg−1∙min−1 were studied in 10 shorn wethers which had been chronically (3–8 weeks) exposed to warm (19–24 °C) or moderately cold (8–13 °C) temperatures. Heat production, as estimated from respired gas analysis, increased 40–45% with all doses of A and the effect was potentiated by chronic cold exposure. Only the higher dose rates of NA induced an increase in HP. The maximum HP increase due to NA was 30% and the effect was not influenced by chronic cold exposure. Thermoneutral HP was greater by 16–19% in cold-acclimated as compared with warm-acclimated sheep. Corresponding to the HP effects of A and NA, all doses of A and the highest dose of NA resulted in slight increases in rectal temperature. Respiration rate increased with increased dose rate of NA but only the highest dose of A resulted in an increase in respiration rate. HR, rectal temperature, and respiration rate responses to A and NA were not influenced by cold acclimation.

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