(n.) The process of invagination, in embryonic development, by which a gastrula is formed.
Example Sentences:
(1) Birthdates of neurons were obtained from autoradiograms of animals receiving tritiated thymidine from gastrulation through 1 month after metamorphosis.
(2) Evx-1 RNA is first detected shortly before the onset of gastrulation in a region of ectoderm containing cells that will soon be found in the primitive streak.
(3) 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.
(4) 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.
(5) On the basis of hystological studies a description of fission and gastrulation in Microsomacanthus paramicrosoma (gasowska, 1931) is given.
(6) This contrasts with embryos ventralized by UV-irradiation and suggests that XBMP-4-induced ventralization occurs after the onset of gastrulation.
(7) Several lines of experimental evidence indicate that contact with the animal pole locus, or "target" region, is crucial for the change in phenotype of the SMCs: (1) the phenotypic change can be induced precociously by bringing the animal pole region within reach of the tip of the archenteron early in gastrulation.
(8) Gastrulation is accompanied by a sharp increase in the AChE activity which was most pronounced in anterior hypoblast.
(9) In the present study, it was found that cytotactin is first present in the gastrulating chicken embryo.
(10) Experiments are described that examine the state of organisation of the presumptive mesoderm and ectoderm of the Xenopus embryo at stages up to the onset of gastrulation.
(11) 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.
(12) (d) Tenascin blocks cell adhesion to FN in vitro and gastrulation in vivo.
(13) In contrast, in vitro activity of mannosylphosphoryldolichol synthase, another enzyme in the pathway of N-linked glycosylation, was maximal in membranes from egg and embryos in the early stages of development and declined prior to gastrulation.
(14) As an immediate consequence of neural induction during gastrulation, some neuroectodermal cells acquire the ability to develop a number of specific neuronal and astroglial features, without requiring subsequent chordamesodermal cues.
(15) After gastrulation additional novel non-oogenetic proteins were synthesized for most stages examined.
(16) An analysis of changes in cell shape during the initial phase of gastrulation indicates that there is a stage-dependent shift from cells being columnar to having their apices skewed toward the vegetal plate and an increase in the proportion of cells having basal processes during gastrulation.
(17) In view of the hypocalcaemic properties of calcitonin and the importance of calcium ions in cell aggregation, this phenomenon has been attributed to an alteration in cell adhesion which results in faulty cell migration during gastrulation with consequent abnormalities of the prechordal region of the archenteron roof and the overlying neural plate.
(18) Microtubule distribution was examined in whole mounts of Drosophila embryos from the cellularization of the syncytial blastoderm (stage 6) to the completion of the gastrulation (stage 7) by fluorescence microscopy.
(19) These changes in the dynamic properties of the lipid probe HEDAF during gastrulation suggest that the lipid phase of the plasma membrane of these ectodermal cells undergo structural changes.
(20) In Lytechinus, the late appearing histone, H1g, begins to be synthesized at gastrulation.
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.