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Author Stevens, R.G.
Title Electric power use and breast cancer: a hypothesis. Type Journal Article
Year 1987 Publication Am J Epidemiol Abbreviated Journal
Volume 125 Issue Pages 556-561
Keywords Human Health
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Call Number LoNNe @ christopher.kyba @ Serial 533
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Author Lewy, A.; Wehr, T.; Goodwin, F.; Newsome, D.; Markey, S.
Title Light suppresses melatonin secretion in humans Type Journal Article
Year 1980 Publication Science Abbreviated Journal Science
Volume 210 Issue 4475 Pages 1267-1269
Keywords Human Health
Abstract Bright artificial light suppressed nocturnal secretion of melatonin in six normal human subjects. Room light of less intensity, which is sufficient to suppress melatonin secretion in other mammals, failed to do so in humans. In contrast to the results of previous experiments in which ordinary room light was used, these findings establish that the human response to light is qualitatively similar to that of other mammals.
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ISSN 0036-8075 ISBN Medium
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Call Number LoNNe @ christopher.kyba @ Serial 534
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Author Ashkenazi, I. E.; Reinberg, A,; Bicakova-Rocher, A.; Ticher, A.
Title The genetic background of individual variations of circadian-rhythm periods in healthy human adults. Type Journal Article
Year 1993 Publication American Journal of Human Genetics Abbreviated Journal
Volume 52 Issue 6 Pages 1250–1259
Keywords Human Health; Adult; Body Temperature; Bronchi; Bronchi: physiology; Circadian Rhythm; Circadian Rhythm: genetics; Female; Genetic Variation; Hand; Hand: physiology; Heart Rate; Humans; Male; Middle Aged; Sex Factors; Sleep
Abstract As a group phenomenon, human variables exhibit a rhythm with a period (tau) equal to 24 h. However, healthy human adults may differ from one another with regard to the persistence of the 24-h periods of a set of variables' rhythms within a given individual. Such an internal desynchronization (or individual circadian dyschronism) was documented during isolation experiments without time cues, both in the present study involving 78 male shift workers and in 20 males and 19 females living in a natural setting. Circadian rhythms of sleep-wake cycles, oral temperature, grip strength of both hands, and heart rate were recorded, and power-spectra analyses of individual time series of about 15 days were used to quantify the rhythm period of each variable. The period of the sleep-wake cycle seldom differed from 24 h, while rhythm periods of the other variables exhibited a trimodal distribution (tau = 24 h, tau > 24 h, tau < 24 h). Among the temperature rhythm periods which were either < 24 h or > 24 h, none was detected between 23.2 and 24 h or between 24 and 24.8 h. Furthermore, the deviations from the 24-h period were predominantly grouped in multiples of +/- 0.8 h. Similar results were obtained when the rhythm periods of hand grip strength were analyzed (for each hand separately). In addition, the distribution of grip strength rhythm periods of the left hand exhibited a gender-related difference. These results suggested the presence of genetically controlled variability. Consequently, the distribution pattern of the periods was analyzed to elucidate its compatibility with a genetic control consisting of either a two-allele system, a multiple-allele system, or a polygenic system. The analysis resulted in structuring a model which integrates the function of a constitutive (essential) gene which produces the exact 24-h period (the Dian domain) with a set of (inducible) polygenes, the alleles of which, contribute identical time entities to the period. The time entities which affected the rhythm periods of the variables examined were in the magnitude of +/- 0.8 h. Such an assembly of genes may create periods ranging from 20 to 28 h (the Circadian domain). The model was termed by us “The Dian-Circadian Model.” This model can also be used to explain the beat phenomena in biological rhythms, the presence of 7-d and 30-d periods, and interindividual differences in sensitivity of rhythm characteristics (phase shifts, synchronization, etc.) to external (and environmental) factors.
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Call Number LoNNe @ schroer @ Serial 582
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Author Brainard, G.C.; Rollag, M.D.; Hanifin, J.P.
Title Photic Regulation of Melatonin in Humans: Ocular and Neural Signal Transduction Type Journal Article
Year 1997 Publication Journal of Biological Rhythms Abbreviated Journal Journal of Biological Rhythms
Volume 12 Issue 6 Pages 537-546
Keywords Human Health; eye; lens; light; melatonin suppression; photoreceptor; pineal gland; pupil
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ISSN 0748-7304 ISBN Medium
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Call Number LoNNe @ schroer @ Serial 583
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Author Kretschmer, V.; Griefahn, B.; Schmidt, K.-H.
Title Bright light and night work: effects on selective and divided attention in elderly persons Type Journal Article
Year 2011 Publication Lighting Research and Technology Abbreviated Journal Lighting Research and Technology
Volume 43 Issue 4 Pages 473-486
Keywords Human Health
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ISSN 1477-1535 ISBN Medium
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Notes Approved no
Call Number LoNNe @ schroer @ Serial 584
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