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International journal of chronobiology最新文献

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Chronobiology in Russia. 俄罗斯的时间生物学。
International journal of chronobiology Pub Date : 1977-01-01
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引用次数: 0
Vaginal temperature rhythms in sheep. 绵羊阴道温度节律。
International journal of chronobiology Pub Date : 1977-01-01
W G Hunsaker, B Reiser, M Wolynetz
{"title":"Vaginal temperature rhythms in sheep.","authors":"W G Hunsaker,&nbsp;B Reiser,&nbsp;M Wolynetz","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Six ovariectomized adult sheep were tethered in a temperature--and light--controlled room and given feed and water ad lib. Vaginal temperatures were recorded at 10m intervals for 12 or 17d. Hourly means were calculated and subjected to statistical anlayses by time--series procedures. Initial analysis revealed a positive linear trend in most animals suggesting a low frequency rhythm with a period greater than the 17d experimental period. All subsequent analyses were, therefore, conducted on data adjusted for a linear trend. The periodogram, correlogram and spectral density analyses revealed a predominant circadian rhythm in 5 of the 6 animals. Ultradian rhythms, with periods of 12 and 8h, were also present in some animals. The magnitude of the rhythmic change in vaginal temperature, as estimated from the amplitude of the circadian component, varied from 0.05 degrees to 0.16 degrees C. Calculation of the external acrophase indicated that the daily maximum temperature occurred between 0851 and 1727.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 3","pages":"151-62"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12058718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The chronomutagenic effect of deuterium oxide on the period and entrainment of a biological rhythm. II. The reestablishment of lost entrainment by artificial LD cycles. 氧化氘对生物节律周期和夹带的致时效应。2用人工LD循环重建丢失的夹带。
International journal of chronobiology Pub Date : 1976-01-01
C J Hayes, J D Palmer
{"title":"The chronomutagenic effect of deuterium oxide on the period and entrainment of a biological rhythm. II. The reestablishment of lost entrainment by artificial LD cycles.","authors":"C J Hayes,&nbsp;J D Palmer","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Mice caused to ingest 25% or 30% deuterium oxide could no longer be entrained to a 12:12 light-dark cycle. Reentrainment could be established by artificially lengthening the light-dark cycle from a natural 24-hours one, to LD 13:13 or 14:14. It is noted that the relationship between biological rhythms and the ambient LD cycle is strikingly similar to that between coupled unidirectional physical oscillators. It is concluded that while the similarity between the responses of a great many organismic rhythms to deuterium oxide administration suggests that the biological clocks of all organisms are very similar, if not the same, a substance with more specificity to key biological processes than D2O will be required to eventually elucidate the escapement mechanism of the enigmatic living clock.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 1","pages":"63-9"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Irradiation-induced changes in circadian DDT-susceptibility and metabolic rhythms in the housefly. 照射诱导的家蝇ddt易感性和代谢节律的昼夜变化。
International journal of chronobiology Pub Date : 1976-01-01
E Shipp, J Otton
{"title":"Irradiation-induced changes in circadian DDT-susceptibility and metabolic rhythms in the housefly.","authors":"E Shipp,&nbsp;J Otton","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The diel pattern of susceptibility to DDT of houseflies, reared under LD 14 : 10, was shown to be affected by 10 Krads of gamma radiation administered at the pupal stage. An additional peak in susceptibility of the flies to DDT corresponded to the time of irradiation of the pupae. Irradiated flies had higher general LD50 values than untreated flies. Flies reared in darkness demonstrated no discernable group rhythm apart from an altered susceptibility at the pupal irradiation time. Respiration rates of irradiated flies were slightly lower than the control flies and did not change at the time of irradiation. Groups of flies reared in darkness have no significant respiration rhythm.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 2","pages":"71-81"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms. 确定人类昼夜节律中早晚性的自我评估问卷。
International journal of chronobiology Pub Date : 1976-01-01
J A Horne, O Ostberg
{"title":"A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms.","authors":"J A Horne,&nbsp;O Ostberg","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An English language self-assessment Morningness-Eveningness questionnaire is presented and evaluated against individual differences in the circadian vatiation of oral temperature. 48 subjects falling into Morning, Evening and Intermediate type categories regularly took their temperature. Circadian peak time were identified from the smoothed temperature curves of each subject. Results showed that Morning types and a significantly earlier peak time than Evening types and tended to have a higher daytime temperature and lower post peak temperature. The Intermediate type had temperatures between those of the other groups. Although no significant differences in sleep lengths were found between the three types, Morning types retired and arose significantly earlier than Evening types. Whilst these time significatly correlated with peak time, the questionnaire showed a higher peak time correlation. Although sleep habits are an important déterminant of peak time there are other contibutory factors, and these appear to be partly covered by the questionnaire. Although the questionnaire appears to be valid, further evaluation using a wider subject population is required.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 2","pages":"97-110"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two biological rhythms of perception distinguishing between intact and relatively damaged brain function in man. 两种生物感知节律区分完好的和相对受损的人脑功能。
International journal of chronobiology Pub Date : 1976-01-01
J W Lovett Doust
{"title":"Two biological rhythms of perception distinguishing between intact and relatively damaged brain function in man.","authors":"J W Lovett Doust","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A simple test of perception, the Critical Flicker Fusion threshold (CFF) was given successively for 20 mins. to 69 healthy subjects aged 7-63 and to 53 comparable neuropsychiatric patients. The latter could be divided into a functionally sick group and a group with brain damage. Auto-correlation analysis revealed significant sine-wave cycles of amplitude and ultradian frequency for the CFF mean scores and the CFF \"Scatter* scores. Both cycles of recurrence showed frequencies which distinguished significantly between the total healthy subjects and the patients. Further analysis showed no difference between controls and emotionally sick patients (i.e. those with sociopathy, schizophrenia and manic depressive psychosis) but there was a highly significant difference between these three groups and patients with relatively damaged C.N.S. (i.e. those with mental deficiency, organic brain syndrome and organic dementia). Even among the control group a progressive increase in frequency of these perceptual cycles occurred with advancing age. These CFF results point to the existence of a cycle of perceptual acuity and another of vigilance in the organism. Both appear to relate to the neural integrity of the C.N.S.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 1","pages":"39-49"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of meal timing on circadian rhythms in 9 physiologic variables of young healthy but obese women on a calorie restricted diet. 限制卡路里饮食的年轻健康肥胖女性进餐时间对生理节律的9个生理变量的影响
International journal of chronobiology Pub Date : 1976-01-01
M Apfelbaum, A Reinberg, D Lacatis
{"title":"Effects of meal timing on circadian rhythms in 9 physiologic variables of young healthy but obese women on a calorie restricted diet.","authors":"M Apfelbaum,&nbsp;A Reinberg,&nbsp;D Lacatis","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 1","pages":"29-37"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Acetabulaira mediterranea: circadian rhythms of photosynthesis and associated changes in molecular structure of the thylakoid membranes. 地中海髋臼:光合作用的昼夜节律和类囊体膜分子结构的相关变化。
International journal of chronobiology Pub Date : 1976-01-01
T Vanden Driessche, E Dujardin, A Magnusson, C Sironval
{"title":"Acetabulaira mediterranea: circadian rhythms of photosynthesis and associated changes in molecular structure of the thylakoid membranes.","authors":"T Vanden Driessche,&nbsp;E Dujardin,&nbsp;A Magnusson,&nbsp;C Sironval","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Acetabularia mediterranea algae, grown in three different light-dark regimes, were frozen in liquid nitrogen at c.t.(1) 0 and c.t. 6 and a record made of 77 degrees K fluorescence emission spectra of their chloroplasts. Algae grown under LD cycles exhibited a clear circadian rhythm of oxygen production. The low temperature fluorescence emission spectrum at c.t.0 was different from that at c.t.6 and this difference was increased by submitting the algae to successive \"freeze-thaw\" treatment. Similar results were obtained in DD, and the photosynthesis rhythm remained fully expressed. Algae grown in LL, where no rhythm of photosynthesis could be detected in the samples because there is a great individual variability in period lenght under these conditions, exhibited a similar difference in their low temperature flourescence emission spectra between c.t.0 and c.t.6. We conclude that the circadian rhythm in low-temperature fluorescence emission of the chloroplasts in Acetabularia is related to the circadian rhythm in photosynthesis.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 2","pages":"111-24"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The circadian variations of the rates of excretion of urinary electrolytes and of deep body temperature. 尿电解质排泄率和深体温的昼夜变化。
International journal of chronobiology Pub Date : 1976-01-01
D S Minors, J N Mills, J M Waterhouse
{"title":"The circadian variations of the rates of excretion of urinary electrolytes and of deep body temperature.","authors":"D S Minors,&nbsp;J N Mills,&nbsp;J M Waterhouse","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>53 apparently healthy subjects were studied for control spans of between 60 and 184 hours while they followed a regular pattern of meals, ambulance and sleep before experiments on altered time schedules. Urine was collected and deep body temperature was measured every 2 hours while they were awake, and in some rectal temperature was also recorded during sleep. Urine was analysed for sodium, potassium, chloride, phosphate and creatinine and in 26 subjects also for calcium and uric acid. The rhythms of temperature, urine flow, and rate of excretion of each urinary solute, are presented as consinors. The two rhythms most closely linked were of excretion of chloride and sodium; the choloride acrophase led the sodium acrophase by one a half hours.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 1","pages":"1-28"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A chronobiological investigation of fitness for work in women on a 220 cal 24 h protein diet. 220卡路里24小时蛋白质饮食对女性工作适应性的时间生物学研究。
International journal of chronobiology Pub Date : 1976-01-01
M Apfelbaum, A Reinberg, F Duret
{"title":"A chronobiological investigation of fitness for work in women on a 220 cal 24 h protein diet.","authors":"M Apfelbaum,&nbsp;A Reinberg,&nbsp;F Duret","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In a group of nine healthy but obese women a set of tests were used to estimate several physiological and psycho-physiological variables: self-rating of hunger, mood and physical vigor, self-recording of grip-strength, muscular fatigue test, eye-hand skill, tempo, etc. Measurements were performed every 6-hours, at fixed times, during 24-hours, once a week, before (non-restricted spontaneous food intake) and for three weeks on a 220 cal. special protein diet (calcium caseinate: 55g, associated with potassium salts, water and vitamins). Findings relating to the metabolic and hormonal variables while on this diet have already been reported: (a) The diet does not alter the circadian acrophase (peak) of the variables and (b) two distinct metabolic steps occur: first a peak of gluconeogenesis and second, a phase when ketone bodies and fatty acids are used almost exclusively as source of fuel. The present findings show that so long as nitrogen remains in balance this restricted diet (a) does not change the grip strength and the muscular fatigue test; (b) does not alter the mood, the physical vigor etc. and (c) induces a statistically significant fall in \"hunger\" (self-rating method). We conclude that this low protein diet is compatible with non-strenuous work.</p>","PeriodicalId":75936,"journal":{"name":"International journal of chronobiology","volume":"4 1","pages":"51-62"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12208555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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