(n.) A grayish variety of trachyte; -- so called from the Puy-de-Dome in Auvergne, France, where it is found.
Example Sentences:
Somite
Definition:
(n.) One of the actual or ideal serial segments of which an animal, esp. an articulate or vertebrate, is is composed; somatome; metamere.
Example Sentences:
(1) In the present study, we have compared the phosphorylation state of the fibronectin receptor in motile neural crest and somitic cells, in stationary somitic cells, and in Rous-sarcoma virus transformed-chick embryo fibroblasts, using immunoprecipitation following metabolic labeling.
(2) The PGCs were picked up with a fine glass pipette, and one hundred were then injected into the terminal sinuses of 2-day-old Japanese quail embryos (24 somites); bubbles were then inserted to prevent haemorrhage.
(3) The aim of this study is to test the ability of the intrinsic wing musculature to develop in the absence of somitic mesoderm.
(4) At the 10-somite stage, the rhythmical contraction is established and striated myofibrils become distinctly discernible.
(5) Our motility analyses of the chimaeras confirmed that transplanted thoracic somitic mesoderm gives rise to brachial musculature and that the experimental muscles maintained the inherent dystrophic phenotype.
(6) Metabolism studies demonstrated that the early somite embryo possesses a limited capacity to oxidatively metabolize B-OHB.
(7) Metabolic events in somites related to hyaluronic acid are not influenced by the notochord.
(8) In implants of either multiple rostral or caudal somite-halves, the grafted mesoderm dissociates normally into sclerotome and dermomyotome.
(9) Further spreading of the labelled cells to several somites in some cases was probably the result of a more extensive mixing of mesodermal cells among the somitomeres prior to somite segmentation.
(10) However, the hybrid populations tended to have significantly fewer somites and to be significantly larger than the parental populations at comparable stages of facial development.
(11) In the rat embryonic heart, the onset of spontaneous electrical activity and contraction occurs at the three-somite stage.
(12) Thus when the implant consisted of compound cranial half-somites, giant, coalesced ganglia developed, encompassing the entire length of the graft.
(13) Two normal-looking embryos were recovered on the 9th and 10th day (4-somite and ca.
(14) High levels were found in the primitive heart, hepatic diverticulum and septum transversum; lower levels were found in the early somites and other primitive mesenchymal derivatives and midgut endoderm.
(15) This adhesion is then supplemented by the development of tight junctions proximally in the somite.
(16) Our studies span the period between early somite stages and full term.
(17) In contrast, changes in the prevalence of N-CAM did not strictly accompany the remodeling of the somitic epithelium into dermamyotome and sclerotome.
(18) Subsequently, vimentin persists in the endoderm and mesoderm and the tissues derived therefrom, such as the somites and developing heart, throughout the period of study.
(19) myf-5 is the only myogenic factor sequence present in the somite prior to muscle formation and thus is potentially involved in an earlier step of muscle determination.
(20) Adjacent to the caudal half of each somite, these cells penetrated no further than the myosclerotomal border, but opposite the rostral somite half, they were found next to the sclerotome almost as far ventrally as the notochord.