Showing papers by "University of Córdoba (Spain) published in 1973"
TL;DR: A radioimmunological method is described and evaluated for the determination of 20α-dihydroprogesterone (20α-hydroxypregn-4-en-3-one) in peripheral venous plasma of men and women and the antiserum is highly specific.
15 citations
TL;DR: The organization of the morphophysiological unit in A nagallis arvensis L. is conditioned by vegetative growth, which is expressed as indeterminate under short-day conditions and as determinate under long-day ones; ind determinate growth and permanent rooting capacity provide an efficient mechanism for perpetuation.
Abstract: The organization of the morphophysiological unit in A nagallis arvensis L. is conditioned by vegetative growth, which is expressed as indeterminate under short-day conditions and as determinate under long-day ones. The perpetuation mechanism is a function of the environment. Under SD conditions ontogenetic morphogenesis is incomplete, and the unit does not form specific reproductive structures; indeterminate growth and permanent rooting capacity provide an efficient mechanism for perpetuation. Under LD complete ontogenetic morphogenesis assures perpetuation by seeds. The appearance of senescence is independent of the nature of the morphophysiological unit and is directly related to growth cessation. It affects organs only when growth is indeterminate (SD) and the whole organism when growth is determinate (LD). Organ senescence seems related to growth itself, and organism senescence would appear closely related to photoperiodic effects. Photoperiod controls organization of the unit, ontogenetic morphogenesis, and organism senescence simultaneously. The number of leaves per node, flowering, organization, and senescence of the organism are all directed toward a more or less evolved state by the effects of the photoperiodic condition.
8 citations
TL;DR: In this article, the formation of galaxies was triggered off by energy density fluctuations in the hadronic era of the universe, and the mass spectrum of galaxies and galaxies in clusters was given by the thermodynamics of strong interactions.
Abstract: If the formation of galaxies was triggered off by energy density fluctuations in the hadronic era of the universe, then the mass spectrum of galaxies (and galaxies in clusters) is given by the thermodynamics of strong interactions. An observational test is proposed.
8 citations