Buscar
Mostrando ítems 1-10 de 1030
Growth and maturity of the spider crab Halicarcinus planatus (Brachyura: Hymenosomatidae) females in the southwestern Atlantic Ocean. Can these parameters be influenced by the population sex ratio?
(Taylor & Francis, 2016-06)
The Halicarcinus planatus populations of the southwestern Atlantic Ocean show a highly variable sex ratio and a large size overlapping between females in the last immature instar (ADO) and mature (MAT) females. We hypothesized ...
Steroid hormones interact with natriuretic peptide C to delay nuclear maturation, to maintain oocyte-cumulus communication and to improve the quality of in vitro-produced embryos in cattle
(Csiro Publishing, 2017-10-01)
In vivo, oocyte maturation is triggered by the ovulatory LH surge, whereas in vitro it is precociously induced when the cumulus-oocyte complex is removed from the follicle. Natriuretic peptide C (NPPC) delays germinal ...
Roscovitine use for the delay of meiotic progression in prepubertal sheep oocytes
(Empresa Brasil Pesq Agropec, 2020-01-01)
The objective of this work was to evaluate the efficiency of roscovitine on reversibly inhibiting oocytes from prepubertal sheep at the germinal vesicle (GV) stage, and to investigate the kinetics of meiosis progression ...
Role of roscovitine and IBMX on kinetics of nuclear and cytoplasmic maturation of bovine oocytes in vitro
(Elsevier B.V., 2007-05-01)
The 3-isobutyl-1-methylxanthine (IBMX) is able to prevent resumption of meiosis by maintaining elevated cyclic AMP (cAMP) concentrations in the oocyte, and roscovitine, a purine known to specifically inhibit MPF kinase ...
Role of roscovitine and IBMX on kinetics of nuclear and cytoplasmic maturation of bovine oocytes in vitro
(Elsevier B.V., 2007-05-01)
The 3-isobutyl-1-methylxanthine (IBMX) is able to prevent resumption of meiosis by maintaining elevated cyclic AMP (cAMP) concentrations in the oocyte, and roscovitine, a purine known to specifically inhibit MPF kinase ...
Stages of plumage maturation of the Tawny-bellied Seedeater: Evidence of delayed plumage maturation and cryptic differentiation between juveniles and females
(Cooper Ornithological Society, 2011-11)
In some sexually dichromatic passerines, juvenile males retain a plumage similar to that of adult females through their first year or longer (delayed plumage maturation). The Tawny-bellied Seedeater (Sporophila hypoxantha) ...
Late seed maturation improves the preservation of seedling emergence during storage in soybean(1)
(Abrates-assoc Brasileira Technologia Sementes, 2018-04-01)
Long-term survival during dry storage or longevity is a pre-requisite to avoid deterioration, leading to loss of vigor. Longevity is routinely evaluated by the ability to germinate after storage. It increases progressively ...
Puberty in chronic inflammatory conditions
(2020)
Puberty in chronic conditions may be severely delayed or arrested, with resultant poor linear growth, potential truncation of final height, and reduced peak bone mass, thus significantly increasing osteoporosis risk ...
Breeding Experience and not Age Modulates the Song Development of Pied Flycatchers (Ficedula hypoleuca)
(Blackwell Publishing Ltd, 2017)
© 2017 Blackwell Verlag GmbH In songbirds, the development of the species-specific adult song involves a learning process that varies in extension. In species that incorporate new song elements throughout life (open-ended ...
Delayed auditory pathway maturation in the differential diagnosis of hypoacusis in young children
Auditory deficiencies have profound implications for the development of communication abilities, social exchange, and cognitive skills. Although advances in technological instrumentation have decreased the age at which it ...