Results 131 to 140 of about 7,701 (178)
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Nucleotides in embryos in the stages of morula, gastrula, and neurula
Carbohydrate Research, 1976Levels of nucleotides and sugar nucleotides in embryos of Bufo arenarum at the stages of morula, gastrula, and neurula have been measured. The total amounts of purine nucleoside diphosphates decreased from morula to gastrula, but increased sharply from gastrula to neurula.
S M, Moreno +4 more
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On the invagination of the gastrula
Protoplasma, 1930An experimental study of the problem of gastrulation has yielded evidence which shows that the present prevailing theories are inadequate to account for the facts.
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Potenzprüfungen an der Gastrula
1936Zu Beginn der Gastrulation sind, wie wir gesehen haben, die einzelnen Bezirke des Amphibienkeims schon weitgehend determiniert, sowohl dynamisch wie materiell. Der jungen Gastrula ist ein Muster von Entwicklungstendenzen aufgepragt, nach welchem die Gestaltungs-bewegungen wie die gewebliche Differenzierung ablaufen.
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Ruffling and locomotion in Rana pipiens gastrula cells
Experimental Cell Research, 1976Abstract Embryonic amphibian cells move during gastrulation, even though they are in contact with many neighboring cells. The behavior of these cells in vitro with respect to cell movement and contact inhibition is thus of interest. Cultures of isolated presumptive mesodermal cells of early Rana pipiens gastrulae were sealed with a coverslip and ...
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Journal of Experimental Zoology, 1989
AbstractExperiments were performed to examine adhesion of Rana pipiens gastrula cells and arrested hybrid gastrula cells to fibronectin‐Sepharose beads (FN‐beads). Blastula cells from both normal and hybrid embryos show poor adhesion to FN‐beads. Beginning at the early gastrula stage, however, normal cells show a progressively increasing tendency to ...
K E, Johnson, M H, Silver
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AbstractExperiments were performed to examine adhesion of Rana pipiens gastrula cells and arrested hybrid gastrula cells to fibronectin‐Sepharose beads (FN‐beads). Blastula cells from both normal and hybrid embryos show poor adhesion to FN‐beads. Beginning at the early gastrula stage, however, normal cells show a progressively increasing tendency to ...
K E, Johnson, M H, Silver
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Newly synthesized extracellular ribonucleic acids in the amphibian gastrula
Cell Differentiation, 1983The possible synthesis of RNA located in the extracellular compartment of Bufo arenarum gastrula was studied using a biochemical method. [3H]adenosine was microinjected into the blastocoel of late blastulae or early gastrulae, which were then dissociated at advanced gastrula stage.
S S, Sánchez +2 more
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Blastulas, Gastrulas and the First Animals
2003A blastula consists of similar, non-specialized cells resulting from divisions of a metazoan egg. Most metazoans go through such a phase in their early development, and it is widely assumed that the blastula represents an early phase in animal evolution.
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Formation and Functions of the Gastrula Organizer in Zebrafish
2004The use of amphibian embryos in experimental embryology has a rich history dating back to the late nineteenth century. Manipulations that are possible in certain salamander and frog embryos due to their large size led to the discovery of the dorsal lip as Spemann’s organizer, also known as the gastrula organizer (Spemann and Mangold 1924 ...
Joshua S. Waxman, Randall T. Moon
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Characterization of small RNAs in X. tropicalis gastrulae
genesis, 2012AbstractHere, we report and characterize deep sequencing data and bioinformatics analysis of small RNAs from X. tropicalis gastrula. A total of 17,553,124 reads with perfect match to the genome derived from 2,616,053 unique sequences were identified. Seventy‐seven percent of theses sequences were not found in previous reports from X. tropicalis oocytes
Fernando, Faunes +3 more
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Specification of cell fates at the dorsal margin of the zebrafish gastrula
Development, 1996ABSTRACT Using fate mapping techniques, we have analyzed development of cells of the dorsal marginal region in wild-type and mutant zebrafish. We define a domain in the early gastrula that is located just at the margin and centered on the dorsal midline, in which most cells generate clones that develop exclusively as notochord.
Melby, A., Warga, R., Kimmel, C.
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