Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 55 for “"Chick embryo"”.
-
Molybdenum toxicity in the developing chick embryo
… in the egg by the laying hen to the developing chick embryo permitted the estimation of the L.D.₁₀₀ to be about 17 ppm of molybdenum. This value agrees quite closely to the L.D.₁₀₀ of yolk sac injected molybdenum. The embryonic death response observed in this experiment did not occur during any …
-
Redefining the Gastrula Organiser in Early Chick Embryo Development
… body axes and inducing the formation of the embryonic nervous system. Hensen’s node was identified as the equivalent structure in birds due to its ability to induce a complete secondary axis with a regionalised neural tube when grafted to an ectopic location. The node also demonstrates …
-
Studies of the hindbrain roof plate organiser in the chick embryo
… epithelium that tents over a ventricle. Using chick embryos, I have investigated a hypothesis that reconciles the roof plate with this emergent model, in which the organiser properties of the roof plate are invested in its boundaries. Using in vitro co-culture, I show that the gdf7- positive …
-
Investigations of collective cell movement during gastrulation in the chick embryo
During gastrulation in the chicken embryo, the mesoderm and endoderm progenitors migrate in a collective manner. They ingress through the primitive streak and follow routes that reflect their developmental fate. Despite its importance for the formation of the body plan, the mechanisms that define …
-
An Investigation of the Genesis of Lumbosacral Myeloschisis in the Chick Embryo
The genesis of lumbosacral myeloschisis in chick embryos was investigated by a study of serial cross-sections of embryos in which lumbosacral myeloschisis had been induced by the removal of the vitelline membrane over the blastoderm at the 13-, 14-, 15- or 16-somite stages. Defective embryos were …
-
Tail (End) Bud Contributions to the Posterior Region of the Chick Embryo
Made available in DSpace on 2014-12-14T16:11:11Z (GMT). No. of bitstreams: 1 7709170.pdf: 2766150 bytes, checksum: 01fc9923a6fc5ecf4971d784bf9d8743 (MD5) Previous issue date: 1976
-
Structural Microheterogeneity in the Dermatan Sulfate Synthesized by Arterial Chick Embryo Fibroblasts
Made available in DSpace on 2014-12-14T04:27:40Z (GMT). No. of bitstreams: 1 7803939.pdf: 6851256 bytes, checksum: 8f38e0e41b860e83bf0d179c694238b2 (MD5) Previous issue date: 1977
-
The effect of cadmium on some enzymes in the developing chick embryo
Cadmium (Gr. kadmeia - earth), a soft bluewhite metal, is a member of ~roup· II b of the Periodic Table, and lies between zinc and mercury. Cadmium (Cd) possesses the following physical constants: Atomic number 48; atomic weight 112.4; valency 2 and specific gravity a.?. The metal melts at 321°C …
-
The influence of blood flow on angiogenesis in the 3-day chick embryo
… the vasculature, had no effect on blood flow. Embryos were divided into ligated, sham, and control groups. After ligature placement and 6 hr. reincubation, KCl, added topically induced cardiac arrest. The diameters of the anterior cardinal vein, anterior vitelline vein, vitelline artery, and …
-
Polarized Inhibitory Control of Differentiation in the Early Chick Embryo, Studied in Vitro
Made available in DSpace on 2014-12-04T22:46:13Z (GMT). No. of bitstreams: 1 6003938.pdf: 2351035 bytes, checksum: 8cf10a15c45201441bcaebf14f73a7ed (MD5) Previous issue date: 1960
-
Sexing Study of Interphase Duodenum and Liver Nuclei in the Sixteen-Day Chick Embryo
… in the interphase nuclei of the 16-day chick embryo. A Feulgen staining procedure was performed on sectioned epithelial tissues of the intestinal villi as well as sections and squashes of liver tissues. All chromatin masses, not just those suspected to represent sex chromatin, were …
-
The Effect of Trypan Blue on the Growth Rate of the Chick Embryo During Development
… determine if the growth rate of the developing chick embryo is changed by the teratogenic agent, trypan blue. Procedure. The eggs were divided into three groups, unopened controls, saline-injected (0.1 ml, 0.85 NaCl) standards and trypan-blue-injected (0.1 ml, 0.1% solution) experimentals. …
-
The chick embryo amnion as an in vitro culture system for IVF and NT embryos
… reduced following in vitro production of embryos. Thus, if a technique could be developed that would increase calving rates by as little as one viable offspring, significant research advances could be made. Therefore, in a series of experiments, the efficiency and quality of culturing IVP …
-
An Analysis of Morphogenetic Movements on the Marginal Indentations of the Chick Embryo Yolk Sac
The normal production of a multicellular organism from a single-celled zygote depends upon the processes of growth, differentiation, and morphogenesis. The classification of an organism as multicellular necessitates the involvement of the growth process, since multicellularity implies the …
-
The isolation, partial purification and preliminary characterization of a growth factor from chick embryo brains
… growth factor (CBGF) is a mitogen isolated from embryonic chick brains thought to have a potential role as a trophic factor involved in nerve dependent amphibian limb regeneration. In addition, CBGF stimulates 3H-thymidine incorporation in chick embryo brain astrocytes in vitro. In this study, …
-
Effects of Growth Conditions on the Carbohydrate Composition of Normal and Transformed Chick Embryo Fibroblasts
Made available in DSpace on 2014-12-14T04:27:35Z (GMT). No. of bitstreams: 1 7624169.pdf: 6168911 bytes, checksum: bc8736b8af6c22841c6fd1c62fe5725c (MD5) Previous issue date: 1976
-
An Analysis of the Collagen Synthesized by Chondrocyte Cultures Derived From the Chick Embryo Tibiotarsus
Chondrocyte cell cultures originating from the histologically distinct zones of the tibiotarsus synthesize chondroitin sulfate and type II collagen in primary and secondary cultures. The collagen is secreted into two extracellular collagen pools, the medium (CM) and matrix (Ma) fractions. The …
Page 1 of 3