(1) The blastocyst antiluteolytic protein therefore closely resembles the interferon-alpha family of antiviral proteins.
(2) Fewer one-cell embryos co-cultured with dissected ampullae for less than 24 h developed to blastocysts than those co-cultured for more than 28 h (P < 0.001).
(3) Uterine lavage affords the potential for non-invasive human blastocyst recovery, with obvious potential for preimplantation genetic diagnosis.
(4) It has been established that the quality of water for the preparation of culture media has an essential influence on the percentage of two cell-stage mouse embryos developing successfully until the blastocyst stage.
(5) Embryos bisected at blastocyst stages had a higher survival rate in vitro than those bisected at the morula stage.
(6) The amount of histone mRNA in cleaving and blastocyst embryos is probably sufficient to code for the blastocyst histone proteins.
(7) Rabbit morulae and blastocysts were cultured in conventional culture media [Ham's F10 or BSM II supplemented with bovine serum albumin (BSA) or serum] or in Ham's medium supplemented with synchronous or asynchronous uterine flushings, mostly for 2 days, and afterwards investigated by light and electron microscopy and by autoradiography.
(8) The effect of taurine on blastocyst formation appeared to be restricted mostly to the period 20-48 h after fertilization, during which time mouse embryos are at the two-cell stage.
(9) No significant effects were observed for percentage cleavage or percentage expanded blastocyst formation in either the endotoxin (E) or the tumor necrosis factor (TNF) groups.
(10) [3H]tryptophan was extremely toxic, compared with [3H]glutamic acid, and inhibited growth of the two-cell embryo to the blastocyst stage.
(11) Fluorescein-labelled gamma globulin fractions of anti-avidin and anti-uteroglobin both bound to blastocysts, but pure FITC-IgG showed binding only of anti-uteroglobin.
(12) Development to blastocysts was greatly affected by the stage of the cycle of the donor nucleus.
(13) It was suggested that the entry of copper into blastocyst lysosomes was followed by release of lysosomal enzymes, cellular autolysis, and death of the affected cells.
(14) The latter group received progesterone to permit blastocysts and the dissected fragments to enter into quiescence, prior to injection of oestradiol to induce implantation.
(15) Several mouse mutants in the distal region of the mouse t-complex affecting blastocyst and embryonic ectoderm formation also map to this region.
(16) Uterine horns were flushed in 5 cats 6-8 days after mating with expanded blastocysts being collected from 4 cats.
(17) The capsule which surrounds the pre-attachment equine embryo has been compared with the zona pellucida (zp) that it replaces, as well as with the rabbit blastocyst coverings, by means of physicochemical and immunological methods.
(18) Levels of pregnenolone and progesterone in spherical pig blastocysts (near 4 and 15 microM respectively) exceeded respective levels in histotroph by about 400-fold.
(19) The present study investigated the ontogeny of 3H-uridine incorporation into RNA as a measure for RNA synthesis in preimplantation porcine embryos from the two-cell stage up to the stage of the newly hatched blastocyst.
(20) Blastocyst formation, hatching of blastocysts, and the number of cells per embryo were affected by this increase in radiation risk.
Blastula
Definition:
(n.) That stage in the development of the ovum in which the outer cells of the morula become more defined and form the blastoderm.
Example Sentences:
(1) The activity was maximum at the 16-32-cell stage and then decreased to a minimum at the mesenchyme blastula stage.
(2) In Lytechinus pictus, the protein cannot be detected in eggs or in embryos until the mesenchyme blastula stage.
(3) In the present study, ectodermal explants from Xenopus blastulae were shown to have high affinity binding sites for 125I-aFGF (Kd = 1.4 X 10(-10) M).
(4) In blastula nuclei, over half of the RNA synthesis is effected by polymerase II (inhibited by alpha-amanitin), the proportion remaining roughly constant with increasing ionic strength.
(5) The embryos incubated in vitro at the from blastula stage are characterized by the sharp activation of protein synthesis and the vegetal-animal gradient of protein synthesis, as well as in the control embryos; such embryos gastrulate and proceed to primary differentiation.
(6) Scanning electronmicroscopy examination showed that the morphology of NCH blastula cells, which were obtained from the combination of Tilapia nucleus and goldfish cytoplasm, manifested obviously abnormal features and the cells were arrested at different stages of cell disintegration.
(7) Measurements of absolute transcript abundance show that collagen mRNA is present in blastula primary mesenchyme cells at 600-700 copies per cell and at about fourfold lower amounts in other mesenchyme cells.
(8) beta-Catenin, recognized by an anti-arm antibody, is also present in the fertilized egg and in blastula-stage embryos.
(9) The tandemly repeated genes were expressed at a higher rate in blastula than in gastrula stage relative to the single-copy gene, when the two genes were injected into sea urchin zygotes.
(10) As a result, there is a loss of the 'compacted' epithelial surface of the blastula, an inability to close a wounded surface and defective gastrulation.
(11) This aggregation is prevented by Fab fragments obtained by immunization with purified membranes from blastula embryos.
(12) In S. purpuratus, the Hbox1 gene product probably is not involved in initial specification of cell fate, as this message does not achieve a significant fraction of its peak abundance until almost hatching blastula stage, well after the time aboral ectoderm cells have initiated a tissue-specific program of gene expression.
(13) First, using eggs at the blastula stage, the proper concentration of cadmium to which the eggs should be exposed was estimated.
(14) Actinomycin D is excluded from unfertilized eggs and developing embryos of the sea urchin Arbacia punctulata until the blastula hatches.
(15) We are investigating the mechanism by which animal cells of an amphibian blastula are induced to differentiate as muscle after contact with blastula vegetal cells.
(16) By the early blastula stage, most of the maternal tubulin sequences were associated with polysomes.
(17) The dynamics of protein synthesis in the loach embryos has been studied by means of autoradiography at the stages of cleavage, blastula and gastrula.
(18) The same material added to dissociated blastula cells, or to embryos at the blastula stage, stimulates skeleton formation and pigment cell differentiation.
(19) New embryonic rRNA transcripts are first detectable at the very early blastula stage.
(20) The nucleus-like structure was partitioned into blastomeres during cleavage through a process of nuclear fission, and was maintained in a group of extraordinarily large blastomeres until the blastula stage.