periodicity

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periodicity

[‚pir·ē·ə′dis·əd·ē]
(mathematics)
The property of periodic functions.
(cell and molecular biology)
The number of base pairs in one turn of the deoxyribonucleic acid duplex.
References in periodicals archive ?
Cross-wavelet analysis of the time series of Dermo disease infection intensity with the 2 time series for submarket and market mortality fraction show significant periodicities at 4 y for submarket mortality (Fig.
Significant periodicities obtained from wavelet analysis of individual time series.
It is also difficult to discern real frequencies of long periodicities in these "short" data sets.
A Fast Fourier Transform identified periodicities of 12.
Sediment resuspension, water temperature, and chlorophyll have periodicities that are not in synchrony with the EN signal and are related only to a minor degree with changes in salinity.
A complete record of mafic magmatism (ages, periodicities, rates, volume estimates, geochemical fluxes, spatial distribution, structural trends, evolving isotope and trace element ratios, paleomagnetic information, associated ore deposits, etc.
Not only did the 30 Myr cycle disappear, but after his analysis Lutz found no evidence for any other periodicities either.
Finding such periodicities is a vital step toward understanding what triggers droughts like those that laid waste to sections of the United States in the 1930s and 1950s.
Geoscientists love to hunt for the pulse beats of the earth, from the monthly patterns in rainfall to periodicities in comet impacts (SN: 1/12/85, p.
Rampino prefer a model in which the solar system oscillates through the galactic plane at the known time interval of 33 million years -- corresponding to periodicities the researchers claim to see in geological records (SN: 1/12/85, p.