Calculation of daylength
نویسندگان
چکیده
منابع مشابه
A constant daylength during the Precambrian era?
The semidiurnal atmospheric thermal tide would have been resonant with free oscillations of the atmosphere when the day was approximately 21 h long, c. 600 Ma ago. Very large atmospheric tides would have resulted, with associated surface pressure oscillations in excess of 10 mbar in the tropics. Near resonance the Sun's gravitational torque on the atmospheric tide--accelerating Earth's rotati...
متن کاملRelationship between daylength and suicide in Finland
BACKGROUND Many previous studies have documented seasonal variation in suicides globally. We re-assessed the seasonal variation of suicides in Finland and tried to relate it to the seasonal variation in daylength and ambient temperature and in the discrepancy between local time and solar time. METHODS The daily data of all suicides from 1969 to 2003 in Finland (N = 43,393) were available. The...
متن کاملCircadian clocks and the measurement of daylength in seasonal reproduction.
Temperate zone organisms measure changes in daylength to adapt to seasonal changes in their environment. Recent studies have revealed that the long day (LD)-induced thyrotropin (TSH) in the pars tuberalis (PT) of the pituitary gland act as a master factor regulating seasonal reproduction on the the ependymal cells (ECs) within the mediobasal hypothalamus (MBH) to induce expression of type 2 dei...
متن کاملEffect of Daylength on Growth and Reproduction of the Cucumber.
Most contemporary studies of photoperiodism in plants have dealt with species which normally flower either in long or short day conditions. There is great experimental convenience and clarity of response in the employment of species which can be qualitatively distinguished as reproductive in a short photoperiod and vegetative in a long photoperiod or vice versa. Phenomenal improvement in our kn...
متن کاملDaylength and circadian effects on starch degradation and maltose metabolism.
Transitory starch is stored during the day inside chloroplasts and broken down at night for export. Maltose is the primary form of carbon export from chloroplasts at night. We investigated the influence of daylength and circadian rhythms on starch degradation and maltose metabolism. Starch breakdown was faster in plants of Arabidopsis (Arabidopsis thaliana) ecotype Wassilewskija growing in long...
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ژورنال
عنوان ژورنال: Bioinformatics
سال: 1997
ISSN: 1367-4803,1460-2059
DOI: 10.1093/bioinformatics/13.4.479