Chronobiologia最新文献_第6页

Spectral analysis of circadian rhythm data: an application in Acetabularia. 昼夜节律数据的光谱分析:在髋臼中的应用。

Chronobiologia Pub Date : 1993-07-01

L Von Lindern, D Mergenhagen, S Berger

引用次数: 0

Pyrrhocoris apterus (L.) chronome's response to lighting may reveal changes in rhythms that switch developmental pathways. 夜蛾(Pyrrhocoris apterus, L.)的生物钟对光照的反应可能揭示了节律的变化，从而改变了发育途径。

Chronobiologia Pub Date : 1993-07-01

M Hodková, I Hodek, G Cornélissen, L K Cutkomp, F Halberg

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A lady and chronobiology. 一位女士和时间生物学。

Chronobiologia Pub Date : 1993-07-01

B J Kennedy

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Gain in power from chronobiologic designs and analyses. 从时间生物学设计和分析中获得力量。

Chronobiologia Pub Date : 1993-07-01

V V Fedorov

引用次数: 0

Circadian cortisol rhythm of rabbits kept on different lighting regimens. 不同光照条件下家兔的皮质醇昼夜节律。

Chronobiologia Pub Date : 1993-07-01

J C Illera, G Silvan, A Portela, M J Illera, M Illera, L Garcia Alonso, G Cornélissen, F Halberg

引用次数: 0

Power of chronobiologic pilots: a statistician's opinion. 时间生物学先导的力量:一个统计学家的观点。

Chronobiologia Pub Date : 1993-07-01

D A Berry

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Biomedical pattern discrimination of neonatal cardiovascular risk. 新生儿心血管风险的生物医学模式辨析。

Chronobiologia Pub Date : 1993-05-01 DOI: 10.11239/JSMBE1963.31.SUPPLEMENT_50

R. Hermida

{"title":"Biomedical pattern discrimination of neonatal cardiovascular risk.","authors":"R. Hermida","doi":"10.11239/JSMBE1963.31.SUPPLEMENT_50","DOIUrl":"https://doi.org/10.11239/JSMBE1963.31.SUPPLEMENT_50","url":null,"abstract":"Genetic risk is a primary contributing factor to the predisposition of a newborn child to elevated blood pressure later in life. An index for this factor is needed to assess in the neonate the success or failure of preventive interventions instituted for the pregnant woman. This index could be based on characteristics describing the variability of blood pressure and heart rate during the first days after birth. In the search for such an index, the systolic and diastolic blood pressures and heart rates of 150 newborn babies were automatically monitored at about 30-minute intervals for 48h with a Nippon Colin device, starting early after birth. On the basis of questionnaires given to the parents, the neonates were assigned to a group of either a negative or positive family history of high blood pressure, according to the absence or presence of high blood pressure and/or related cardiovascular disease in two generations (those of the newborn's parents and grandparents). Circadian characteristics and descriptive statistics for the three circulatory variables were used for classification by a so-called \"monotest\", an all-subsets variable selection technique for biomedical discriminant analysis. For a particular combination of variables, the \"monotest\" performs as many steps of separate analyses as the total number of subjects, each subject's data being compared as a set with those of all others (\"leave-one-out\" approach). When the circadian amplitude of systolic blood pressure was used as classifier, the \"monotest\" yielded a 63% classification equivalent to prior criteria, the latter being based on a negative or a positive family history of high blood pressure. The \"monotest\" complements rhythmometric procedures and defines a set of individualized criteria for risk assessment. The combined use of automatic hardware for time-specified sampling with proper software for signal processing and discriminant analysis allows to recognize parameters of blood pressure circadian variability as a source of information for neonatal classification according to cardiovascular disease risk.","PeriodicalId":75705,"journal":{"name":"Chronobiologia","volume":"21 3-4 1","pages":"227-40"},"PeriodicalIF":0.0,"publicationDate":"1993-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64274413","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

Beyond circadian chronorisk: worldwide circaseptan-circasemiseptan patterns of myocardial infarctions, other vascular events, and emergencies. 超越昼夜节律时间风险:世界范围内的circaseptan- circaseptan模式的心肌梗死、其他血管事件和紧急情况。

Chronobiologia Pub Date : 1993-01-01

G Cornélissen, T K Breus, C Bingham, R Zaslavskaya, M Varshitsky, B Mirsky, M Teibloom, B Tarquini, E Bakken, F Halberg

引用次数: 0

The feedsideward of cephalo-adrenal immune interactions. 头肾上腺免疫相互作用的馈向性。

Chronobiologia Pub Date : 1993-01-01

S Sánchez de la Peña

{"title":"The feedsideward of cephalo-adrenal immune interactions.","authors":"S Sánchez de la Peña","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The feedsideward phenomenon is the interaction of three or more rhythmic physiological entities by a diversified spectrum of rhythms that constitute a rhythmic network. These rhythmic units are: a) the modulator, b) the actor, c) the reactor and d) the integrative unity. Rhythmic interactions are characterized by an alternating sequence of algorithmically predictable effects of attenuation, no effect, and stimulation occurring in different frequencies. The basis of this phenomenon was determined from experimental evidence derived from cephalo-adrenal ex vivo studies. Internal phase-shift studies allow the demonstration ex vivo of a collateral hierarchy of rhythmic neuro-endocrine interactions as alpha, beta, gamma and delta rhythms. Linear least squares analyses describe and quantify circadian (alpha, beta and gamma) and infradian (delta) rhythms in the original series and the differences in responses [beta-alpha] and [gamma-delta]. These spontaneous and response rhythms reveal a collateral neuro-endocrine hierarchy and validate a pineal feedsideward phenomenon. Circadian-infradian murine rhythmic intermodulations are demonstrated in the epithelial corneal mitosis; brain neurosteroids and pineal melatonin content. A circadian rhythm in pineal melatonin content in female B6D2F1 mice and the chronomodulating action of melatonin + ACTH upon adrenal corticosterone production are confirmed. A chronopilot ex vivo study \"suggests\" that melatonin chronomodulates mouse aldosterone production. In a second chronopilot study, HrIL-2 chronomodulates rat corticosterone production ex vivo. Feedsidewards in vivo were seen in the chronomodulation of tumor-host balance occurring after melatonin, IL-2, cefodizime, and cyclosporine treatments that enhanced or delayed tumor growth and survival time of tumor-bearing mice.</p>","PeriodicalId":75705,"journal":{"name":"Chronobiologia","volume":"20 1-2","pages":"1-52"},"PeriodicalIF":0.0,"publicationDate":"1993-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19340928","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

Relationship between activity levels and circadian blood pressure variations. 活动水平与昼夜血压变化之间的关系。

Chronobiologia Pub Date : 1993-01-01

I Kohno, H Ishii, T Nakamura, K Tamura

引用次数: 0