(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.
Ingression
Definition:
(n.) Act of entering; entrance.
Example Sentences:
(1) Thus, the area with separated HL, which is restricted to the region of the PMC released at the stage of PMC ingression, spreads almost entirely throughout the area of the indenting vegetal plate at gastrulation.
(2) During the development of the PM, all five RNAs exhibited the same schedule of accumulation, appearing de novo, or increasing abruptly just before PM ingression, and remaining at relatively high levels thereafter.
(3) A unique pattern for a carbohydrate antigen is displayed by cells of the primitive streak; antigenicity is lost with de-epithelialisation and ingression, but is regained in a pericellular distribution on the mesoderm cells that emerge from the primitive streak.
(4) Younger grafts were completely filled with the protein, even at 2 days, when the graft vasculature already contained host macrophages, whereas all older grafts showed variability in permeation with protein ingress initiating at the graft-host interface and subsequently diffusing through the extracellular spaces.
(5) Time-lapse video recordings of PMC-deficient embryos indicate that the converting cells are a subpopulation of late-ingressing SMCs.
(6) Using indirect immunofluorescence, the epitope is first detected in nonpigmented cells of the vegetal plate after primary mesenchyme ingression.
(7) It is postulated that the decrease in T-cell "immune surveillance" permits: a) the ingress of viruses whose enzymes modify host glycoproteins and render them immunogenic, and b) the replication of viruses incorporated into the genome of cells during infections in early life.
(8) Sodium thiopental leads to further CBF depression up to critical level in the affected hemisphere with parallel blood flow ingress in the intact brain hemisphere.
(9) (d) The ingress of oxygen through the surface can be reduced by placing a clamp round the proximal tail.
(10) SEM observations have indicated that the pouches were effective in reducing the ingress of bacteria as well as reducing, and in some cases eliminating, cell infiltration through their mesh structure.
(11) Inspection of the pool revealed significant plumbing defects which had allowed ingress of sewage from the main sewer into the circulating pool water.
(12) Dr Burstone's technique of incisor ingression uses an appliance operating only on the superior dental arch with light and constant forces which can be precisely adjusted.
(13) We therefore recommend placement of appropriate monitoring equipment to detect intracardiac air in those major craniofacial procedures in which there is a potential for intravascular air ingress.
(14) This factor may also be involved in the maintenance of the fibroblastic phenotype of the mesoderm cells after their ingression, by effects on the expression of receptors for extracellular matrix and on the deposition of matrix by these cells during their early morphogenesis.
(15) During the operation, we found that the intracerebral pneumatocele in the right frontal lobe communicated with the ipsilateral ethmoidal sinus, through which extracranial air ingressed and CSF egressed.
(16) The sequential topographic development of nerve preceding NSE-taste bud cells in precise morphological locations, suggests that the ingress of precursor NSE-taste bud cells and their subsequent differentiation are contingent upon initial neural derived ontologic signals.
(17) The calcareous larval skeleton of euechinoid sea urchins is synthesized by primary mesenchyme cells which ingress prior to gastrulation.
(18) 41, 227-250) implicated that microtubules are essential components for the normal development, including ingression, of the mesenchymal cells.
(19) It felt like a very natural combination on both sides.” The success of the Pokémon April Fool pranks showed that the underlying mechanics of Ingress could be repurposed, to build something that could bring in millions of players who would never usually look twice at the sci-fi trappings of the original game.
(20) Essential informations for treatment planning are: involved sacral segment, infiltration of sacral foramina and nerve roots, involvement of the sacroiliac joints, ingression of the lumbar spine, infiltration of the pelvic organs and vessels, sciatic nerve and the dorsal soft tissues.