نتایج جستجو برای: bovine zygote
تعداد نتایج: 75987 فیلتر نتایج به سال:
The present study demonstrates a major remodeling of the nuclear envelope and its underlying lamina during bovine preimplantation development. Up to the onset of major embryonic genome activation (MGA) at the 8-cell stage nuclei showed a non-uniform distribution of nuclear pore complexes (NPCs). NPCs were exclusively present at sites where DNA contacted the nuclear lamina. Extended regions of t...
Aim The few fish species able to reproduce across wide osmotic ranges either plastically acclimate sperm performance to, or are locally adapted different salinities. invasive round goby (Neogobius melanostomus) is spreading in Eurasia and the Americas, into both fresh brackish water. We aim understand if reproduction salinities affected by an ability acclimate. Location Brackish freshwater syst...
The protocol of in vitro production (IVP) of bovine embryos is one of the critical factors determining embryo viability after cryopreservation. In this study were used two differents protocols to produce IVP bovine embryos, with variations in protein source, oocyte/zygote density per media volume, with the aim to determine the in vitro and in vivo embryo survival after vitrification using hand-...
Several intracellular motility events in the Caenorhabditis elegans zygote (pseudocleavage, the asymmetric meeting of the pronuclei, the segregation of germ line-specific granules, and the generation of an asymmetric spindle) appear to depend on microfilaments (MFs). To investigate how MFs participate in these manifestations of zygotic asymmetry, the distribution of MFs in oocytes and early emb...
Several intracellular motility events in the Caenorhabditis elegans zygote (pseudocleavage, the asymmetric meeting of the pronuclei, the segregation of germ line-specific granules, and the generation of an asymmetric spindle) appear to depend on microfilaments (MFs). To investigate how MFs participate in these manifestations of zygotic asymmetry, the distribution of MFs in oocytes and early emb...
Background: Fibroblast growth factors are a great family of growth factors that exert variety of functions in vertebrates including cell growth, survival, differentiation and migration. FGFRs are transmembrane tyrosine kinase receptors transmitting FGF signals. Four types of FGFRs (1/2/3/4) exist in vertebrates. FGF2 is one of the FGFs detected in bovine and ovine uterus flushes, supposing that...
In the vast majority of sexual life cycles, fusion between single-celled gametes is directly followed by nuclear fusion, leading to a diploid zygote and a lifelong commitment between two haploid genomes. Mushroom-forming basidiomycetes differ in two key respects. First, the multicellular haploid mating partners are fertilized in their entirety, each cell being a gamete that simultaneously can b...
the effect of modified vitrification was assessed on cellular development capability in mouse embryos cultured in vitro. in this study, 466 embryos (from zygote to morula stages) were vitrified then thawed embryos have been incubated for in vitro farther development up to blastocyst stage. also, vitrification and thawing procedures were the same for all experimental groups. mouse different embr...
BACKGROUND Several randomized controlled trials have not shown a benefit from preimplantation genetic screening (PGS) biopsy of cleavage-stage embryos and assessment of up to 10 chromosomes for aneuploidy. Therefore, a proof-of-principle study was planned to determine the reliability of alternative form of PGS, i.e. PGS by polar body (PB) biopsy, with whole genome amplification and microarray-b...
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