نتایج جستجو برای: mpf

تعداد نتایج: 670  

2005
CATHERINE JESSUS HELENE RIME OLIVIER HACCARD JOHAN VAN LINT JOZEF GORIS WILFRIED MERLEVEDE RENE OZON

The tyrosine phosphorylation/dephosphorylation of p34 was estimated by immunoblotting with antiphosphotyrosine antibody during meiotic maturation of Xenopus oocytes. At the time of germinal vesicle breakdown (GVBD), p34 is tyrosine dephosphorylated whereas a p42 protein, which might correspond to a MAP2 kinase, becomes tyrosine phosphorylated. No modification in the level of tyrosine phosphoryl...

2015
Xinbo Li Haixin Sun Liangxu Jiang Yaowu Shi Yue Wu

The conventional direction of arrival (DOA) estimation algorithm with static sources assumption usually estimates the source angles of two adjacent moments independently and the correlation of the moments is not considered. In this article, we focus on the DOA estimation of moving sources and a modified particle filtering (MPF) algorithm is proposed with state space model of single acoustic vec...

2017
Ahmed M. Othman Hossam A. Gabbar

This paper presents a design of microgrid (MG) with enhanced dynamic performance. Distributed energy resources (DER) are widely used in MGs to match the various load types and profiles. DERs include solar PV cells, wind energy sources, fuel cells, batteries, micro gas-engines and storage elements. MG will include AC/DC circuits, developed power electronics devices, inverters and power electroni...

Journal: :The Journal of Cell Biology 1978
W. J. Wasserman L. D. Smith

The activity of a cytoplasmic factor (MPF), capable of inducing nuclear membrane breakdown (germinal vesicle breakdown) when injected into amphibian oocytes, has been studied during the course of early cleavage in amphibian embryos. Mature egg cytoplasm was found to contain high levels of this activity, but this was quickly lost after fertilization or artificial activation. MPF activity later r...

Journal: :Development 1991
C Jessus H Rime O Haccard J Van Lint J Goris W Merlevede R Ozon

The tyrosine phosphorylation/dephosphorylation of p34cdc2 was estimated by immunoblotting with antiphosphotyrosine antibody during meiotic maturation of Xenopus oocytes. At the time of germinal vesicle breakdown (GVBD), p34cdc2 is tyrosine dephosphorylated whereas a p42 protein, which might correspond to a MAP2 kinase, becomes tyrosine phosphorylated. No modification in the level of tyrosine ph...

Journal: :Biophysical chemistry 1998
G Dupont

Mammalian eggs are ovulated in metaphase II of meiosis, in a state characterized by high levels of cyclin B and of active maturation promoting factor (MPF). This arrest is mediated by an activity referred to as cytostatic factor (CSF) which prevents the degradation of cyclin. Fertilization triggers a train of Ca2+ spikes which is responsible for the decrease in activity of both MPF and CSF. The...

2015
Jean Adams Martin White

BACKGROUND Food processing alters food from its natural state for safety, convenience, taste or palatability. Previous research suggests that industrially processed foods, and diets high in these products, tend to be less healthful. However, most previous work is based on household, rather than individual-level, data. Little has been reported on the relationship between processed food consumpti...

Journal: :IEEE Photonics Journal 2023

To meet the requirement of radio frequency signal processing tasks among various bands, here we have demonstrated a reconfigurable microwave photonic bandpass filter by flipping optical notch spectrum cascaded microring resonator (MRR) pool chip through phase modulation. We experimentally characterize MRR on Si3N4 platform and evaluate system performance established (MPF). In system, center can...

Journal: :Molecular human reproduction 1998
O Heikinheimo W E Gibbons

The purpose of the present review is to outline the current understanding on the molecular mechanisms governing various stages of oocyte maturation, transition from maternal to embryonic control and the initial steps of pre-embryo development. The cytoplasmic and nuclear maturation of the oocyte during pre-ovulatory development can be viewed as separate entities. Cytoplasmic maturation and the ...

2007
Federico Flego Christian Zieger Maurizio Omologo

This paper introduces a new technique of multi-microphone processing which aims to provide features for the extraction of fundamental frequency and for the classification of voiced/unvoiced segments in distant-talking speech. A multichannel periodicity function (MPF) is derived from an adaptive weighting of normalized and compressed magnitude spectra. This function highlights periodic clues of ...

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