SEARCH · PubMed Health

Results for “Body Temperature--analysis”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

30 records · Page 2Linked to original sources

PubMed1986

Conditioning exercise decreases premenstrual symptoms. A prospective controlled three month trial.

Conditioning exercise decreased premenstrual symptoms during 3 months of a prospective controlled training study. Eight women with normal ovulatory menstrual cycles began a running exercise training programme while completing intensity-graded questionnaires concerning molimina. Six sedentary control women followed the same protocol for 3 months but did not exercise. Oral basal temperatures evaluated by mean temperature analysis were obtained for all cycles. Exercise distance and time, average exercise heart rate, basal and maximal heart rate and body weights were recorded prospectively and evaluated during the control (0) and 3rd month of the study. Mid-luteal phase progesterone and estrogen levels were sampled during the analyzed cycles for the exercise group. Molimina did not change over 3 months time in the control group. The exercise group, after increasing distance run to 51.0 +/- 18.1 km/cycle at 3 months, showed decreases in overall molimina (scores on a 9-point scale) 6.5 +/- 1.8 to 3.5 +/- 0.9, p less than 0.01). Breast symptoms decreased from 8.3 +/- 0.7, p less than 0.005. Fluid symptoms also decreased from 7.3 +/- 1.8 to 5.5 +/- 0.9, p less than 0.025. Menstrual cycle intervals, luteal lengths, body weights and mid-luteal estrogen and progesterone levels were normal and unchanged. Moderate exercise training without major weight, hormonal or menstrual cycle alteration significantly decreased premenstrual symptoms.

Adult↗

PubMed1994

De novo design and structural characterization of an alpha-helical hairpin peptide: a model system for the study of protein folding intermediates.

The de novo design and structural characterization of an alpha-helical hairpin peptide (alpha-helix/turn/alpha-helix, alpha t alpha) are reported. The peptide is intended to provide a model system for the study of the interactions of secondary structural elements during protein folding. Both the diffusion-collision and framework models of protein folding envision that the earliest intermediates in protein folding are transient secondary structures or microdomains which interact and become mutually stabilizing. Design principles for the alpha t alpha peptide were drawn from the large body of work on the structure of peptides in solution. Computer modeling was not used in the design process. Study of alpha t alpha by circular dichroism and two-dimensional nuclear magnetic resonance indicates that the designed peptide is monomeric, helical, and stable in aqueous solution at room temperature. Analysis of two-dimensional nuclear magnetic resonance experiments indicates that the two helices and the turn form in the intended positions and that the helices associate in the designed orientation. Development of alpha t alpha represents an advance in protein design in that both the secondary structural elements and designed tertiary interactions have been realized and can be detected in solution by nuclear magnetic resonance. The resulting model system resembles a protein folding intermediate and will allow the study of interacting helices in a context that approximates an early stage in protein folding.

Amino Acid Sequence↗

PubMed1987

Assessment of myocardial blood flow by real-time infrared imaging.

In order to evaluate the applicability of infrared imaging for the assessment of myocardial perfusion, 10 open-chested dogs were studied by a real-time infrared imaging system. The left anterior descending coronary artery was occluded for 90 min followed by 210 min of reperfusion. During the experiment, myocardial surface temperature was mapped by an infrared imaging system with a thermal resolution power of 0.1 degree C and correlated with regional myocardial blood flow measured using radiolabeled microspheres. Following the experiment, acute myocardial injury was evaluated using triphenyltetrazolium chloride staining. After 90 min of ischemia, there was a significant correlation between myocardial blood flow and myocardial surface temperature (R = 0.694, P less than 0.001). After reperfusion, temperature did not correlate with blood flow, but there was a significant correlation between temperature and ischemic myocardial injury (R = 0.551, P less than 0.05). Temperature changes during acute regional ischemia and reperfusion may be regulated by the changes in myocardial blood flow and myocardial metabolism. Temperature analysis using real-time infrared imaging may be a useful means for the evaluation of myocardial blood flow and myocardial injury during ischemia and reperfusion.

Animals↗

PubMed1990

Enzymatic and envelope-converting activities of pars recta oviductal fluid from Xenopus laevis.

Conversion of the coelomic egg envelope to the vitelline envelope of the Xenopus laevis egg is known to take place in the pars recta (PR) region of the oviduct. A method for collecting fluid generated from PR cultured in vitro was devised which enhanced the recovery of envelope-converting factors. By the criteria of melting temperature analysis, sodium dodecyl sulfate-polyacrylamide gel electrophoresis, 125I labeling, ferritin binding, and in vitro fertilization assays, the secretions collected from PR cultured in vitro were capable of modifying the envelope in a manner analogous to that which occurred in vivo, including the limited hydrolysis of one envelope glycoprotein. Hydrolytic activities present in PR fluid were assayed with a number of peptide and carbohydrate substrates. Enzymes which hydrolyzed t-butyloxycarbonyl-Leu-Ser-Thr-Arg-methylcoumarylamide, t-butyloxycarbonyl-Phe-Ser-Arg-methylcoumarylamide, and t-butyloxycarbonyl-Val-Leu-Lys-methylcoumarylamide were found to be present in PR fluid at levels elevated by threefold or more over amounts found in a comparable volume of blood plasma.

Amino Acid Sequence↗

PubMed1995

Energy intakes are higher during the luteal phase of ovulatory menstrual cycles.

We compared energy and macronutrient intakes across the menstrual cycle in participants (n = 42) in a study that assessed the frequency of ovulatory disturbances in regularly cycling vegetarians and nonvegetarians. Women kept daily basal body temperature records for six consecutive menstrual cycles and provided 3-d diet records near the beginning, middle, and end of different cycles. On completion of the study, temperature records were quantitatively analyzed to determine whether cycles were ovulatory, and if so, the date the luteal phase began. Diet records kept near the beginning and end of cycles were matched with temperature analysis results, and women were grouped according to whether the end-of-cycle record was kept during the luteal phase of an ovulatory cycle (group 1, n = 29), or during an anovulatory cycle or before luteal phase onset of a short luteal phase cycle (group 2, n = 13). Group 1 had higher energy intakes during the luteal than during the follicular phase (9.27 +/- 2.69 vs 8.01 +/- 2.36 MJ/d, P < 0.0001), whereas intakes of group 2 did not differ across the cycle (7.91 +/- 2.18 vs 8.20 +/- 1.48 MJ/d, NS). Both groups' macronutrient intakes were similar in records kept near the beginning and end of cycles. Documentation of ovulation is necessary in studies assessing premenopausal women's energy intakes.

Adult↗

PubMed1984

[Determination of the time of death based on simultaneous measurement of brain and rectal temperatures].

Analysis of the data on 21 corpses (brain and rectal temperatures which had been recorded simultaneously) yielded the following results and conclusions with regard to separate or combined computations of time of death: In the range of a standardized brain temperature (QH) 0.5 less than or equal to QH less than 1.0 (approx. up to 6.5 hpm), the most precise computations of time of death are achieved by exclusive application of brain temperature (standard deviation around dt = 0 "s0" = +/- 0.75; variation: 3.3 h). In the range of 0.3 less than or equal to QH less than 0.5 (approx. 6.5-10.5 hpm), combined computation of time of death balanced in the ratio of 6:4 (brain/rectum) is comparatively the most precise one (s0 = +/- 1.18; variation: 5 h). In the range of 0.07 less than or equal to QH less than 0.03 (beyond 10.5 hpm), the most precise computation of time of death (s0 = +/- 1.62; variation: 6.6 h) is achieved by exclusive application of rectal temperature. An "integrated" approach composed of both computation formulae, and thus possibly eliminating temperature in the occurrence of death, seems to be appropriate in the range of about 0.5 less than or equal to QH greater than 1.0 to avoid major errors in computing times of death, e.g., in cases involving fever in the occurrence of death (s0 = +/- 0.69; variation: 2.7 h).

Body Temperature↗

PubMed1985

Effect of age and ambient temperature on n-pentane production in adult housefly, Musca domestica.

The objective of this study was to examine the relationship between lipid peroxidation and aging in the male housefly. Metabolic rate of flies is known to be higher and life span shorter at elevated ambient temperature. Evolution of n-pentane and level of thiobarbituric acid (TBA) reactive material were used as indicators of lipid peroxidation. n-Pentane accumulated by houseflies in vivo and by whole body homogenates of houseflies, in response to tert-butyl hydroperoxide (1 mM), increased with age. n-Pentane accumulation in vivo was markedly higher at higher ambient temperature. Furthermore, n-pentane generated by flies in vivo and by fly homogenates in vitro tended to be lower in flies raised at a lower ambient temperature. TBA-reactive material, elicited by tert-butyl hydroperoxide, was augmented in older flies, but no significant difference was found between flies aged at different ambient temperatures. Analysis of fatty acids in housefly homogenates indicated an age-associated increase in the ratio of polyunsaturated to saturated fatty acids.

Aging↗

PubMed1993

Thermoradiotherapy in locally advanced deep seated tumours--thermal parameters and treatment results.

From October 1987 to December 1990 a total of 37 patients with deep seated tumours of the pelvis (n = 34), the abdomen (n = 2), or lower leg (n = 1) were treated with radiotherapy and regional hyperthermia. Hyperthermia was produced by the BSD-1000 system and the annular phased array (AA) applicator usually driven at 60-80 MHz, or the BSD-2000 system and the Sigma-60 (S 60) applicator usually driven at 70-90 MHz. Detailed thermal mapping and temperature analysis was performed on 29 patients. The overall mean maximum, average and minimum temperature observed was 42.9 +/- 2.4 degrees C, 40.9 +/- 1.5 degrees C, and 39.3 +/- 0.9 degrees C for all treatments. The time-averaged tumour temperatures achieved in 20%, 50% and 90% of all measured temperature sites were 41.8 +/- 2.1 degrees C (T20), 40.9 +/- 1.6 degrees C (T50), and 39.9 +/- 1.2 degrees C (T90). In addition, the overall mean maximum, average and minimum temperature measured in normal tissue was 42.4 +/- 1.4 degrees C, 40.6 +/- 1.0 degrees C, and 39.2 +/- 0.9 degrees C. The time averaged normal tissue temperatures achieved in 20%, 50% and 90% of all measured temperature sites were 41.3 +/- 1.1 degrees C, 40.6 +/- 1.1 degrees C, and 39.6 +/- 1.0 degrees C. In 36 assessable patients, the overall objective response rate was 31%: 2 complete responses (CR) and 9 partial responses (PR).

Adult↗

PubMed1988

Carbon dioxide elimination during total cardiopulmonary bypass in infants and children.

The authors measured the rate of carbon dioxide elimination (VCO2) in 25 pediatric patients (age 2 days to 9 yr) during total cardiopulmonary bypass at average venous blood temperatures ranging from 19.5 to 35.9 degrees C. A multiplexed mass spectrometer was connected to the gas inlet and exhaust ports of the bubble oxygenator, and the gas-phase Fick principle was used to determine VCO2. A curvilinear relationship was found between log VCO2 and venous blood temperature, and a quadratic regression equation (r2 = 0.74) was fit to the data. Q10 (the ratio of VCO2 before and after a 10 degree C temperature change) was estimated to be 2.7 or 3.0, depending on the analytic method used. Venous blood temperature as a predictor variable explained a greater proportion of the variability of log VCO2 than did nasopharyngeal or rectal temperatures. Analysis of covariance revealed that total circulatory arrest during bypass (utilized in 10 patients for 34 +/- 4 min, mean +/- SEM) affected the relationship of venous blood temperature with log VCO2, by increasing the y-intercept (P = .008) but not the slope. These data, with associated 95% prediction intervals, define the expected CO2 elimination rates at various temperatures during standard bypass conditions in our patients. Real-time measurement of VCO2 using mass spectrometry can be a useful routine monitor during CPB that may help to assess patient metabolic function, adequacy of perfusion, and oxygenator performance.

Blood Physiological Phenomena↗

PubMed1991

Axillary, tympanic, and esophageal temperature measurement: descriptive comparisons in postanesthesia patients.

Body temperature in postanesthesia patients is considered to be an important vital sign; yet, measurement sites may vary from oral to axillary and rectal to tympanic membrane. The reviewed literature indicated that axillary and rectal temperatures are measures of shell temperature and esophageal and tympanic temperatures are measures of core temperature. This study compared temperatures measured with axillary mercury-in-glass and electronic thermometers with those measured by tympanic and esophageal thermometers in 96 postanesthesia patients. Analysis of the data using paired t test indicated there was no significant difference between the esophageal and tympanic temperatures; however, significant differences were found between mercury and electronic axillary temperatures. Analysis of variance indicated no significant difference between the axillary temperatures as measured by mercury and electronic methods in the arm extended on an arm board during surgery. Further studies are needed using a larger, randomly selected sample to validate this study's findings.

Adult↗

PubMed1982

Task categorization and the limits of human performance in extreme heat.

This paper examines human performance limitations in differing task categories in conditions of elevated ambient temperature. Analysis of extant data affirms that decrement in the three task categories, namely: 1.) mental and cognitive skills; 2.) tracking and 3.) dual task performance, may be expected as environmental exposure exceeds 85 degrees F, effective temperature (E.T.). Further, the systematic changes in impairment onset with tasks requiring differing levels of response complexity in varying time, E.T. conditions, are documented. These changes imply earlier heat stress related decrement in those task categories which require greater response complexity. The proposed thresholds of performance impairment are subsequently equated with absolute, physiologically noncompensable, rises in deep body temperature. Support for the notion that prescribed rises in deep body temperature may delimit efficient performance in each category is found in studies which have examined task performance in situations where deep body temperature has been independently manipulated. Performer skill level is posited as potentially most influential in the mitigation of such heat induced decrement.

Body Temperature↗

PubMedDate not supplied

[The relationship between oxygen consumption and the the rate of rewarming during extracorporeal circulation with induced hypothermia].

This study was performed to investigate the relation between total oxygen consumption (VO2) and the velocity of reheating in patients undergoing cardiopulmonary bypass with hypothermia. A total of 17 males undergoing this procedure were studied prospectively (mean age: 63 years, range: 52-72); during surgery they were cooled at 28 degrees C whole-body temperature. Before rewarming, patients were divided at random in two groups. Group A (n = 8) was reheated between 10 and 25 minutes, and group B (n = 9) between 26 and 50 minutes. In group A, VO2 expressed in ml.min-1 x m-2 increased from 76.6 +/- 6.99 at 28 degrees C until 100.0 +/- 6.72 at 34 degrees C; in group B increased from 68.4 +/- 4.55 until 129.1 +/- 4.73 at similar temperatures (analysis of variance: p < 0.01 at 28 degrees C). A greater VO2 in group B could indicate that slow rewarming would cause an even distribution of temperature with enough time for tissues to rid of their oxygen debt.

Aged↗