Download or read book Electron Microscope Studies of Chick Embryo Nerve written by Alden Vickery Loud and published by . This book was released on 1951 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scanning Electron Microscopy Studies of Embryogenesis written by Gary C. Schoenwolf and published by Scanning Electron Microscopy. This book was released on 1986 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Early Development of the Chick Embryo as Seen by Scanning Electron Microscopy written by Mary Bancroft and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electron Microscope Observations of Early Myogenesis in the Chick Embryo written by Wayne R. Ferris and published by . This book was released on 1959 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Light and Electron Microscope Studies of Immunocytochemical Localization of the Acth Cells in the Pituitary Gland of Chick Embryos written by Junetta Pricilla Tabor and published by . This book was released on 1981 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlas of Chick Development written by Ruth Bellairs and published by Elsevier. This book was released on 2005-09-15 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This outstanding work is the only modern book devoted to the chick embryo and has been an essential resource for geneticists, molecular and developmental biologists, and other life scientists who use the chick embryo as their research model. This new enlarged and updated second edition is published in response to continuing demand. The text provides a detailed description of development, from fertilization to hatching, with emphasis on the earlier stages though also covering individual organ systems in detail. There are reviews of the more recent molecular research and a new section highlighting the important landmarks in the history of chick embryology which have had an impact on our understanding of developmental processes. The book is beautifully illustrated with 74 text-figures and over 500 photographs, including nearly 200 new scanning electron micrographs. - Updated and expanded text to accompany diagrams - More than 200 new labelled scanning electron micrographs showing individual tissues in great detail - Reviews of recent molecular research - Discusses the roles of genes such as Hox genes, BMPs, and sonic hedgehog during early development - New sections on genetical anomalies, techniques, and the poultry industry
Download or read book Morphological Changes in Chick Embryo Neural Tissue Associated with Hydrocortisone Use During Prenatal Development written by Eureka Smit and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Glucocorticoids known to be such powerful agents that cell growth, differentiation and cell death are influenced in the brain of mammals throughout life. Despite this, relatively little toxicological information regarding prenatal exposure is available. The aim of this study was to determine the effect of prenatal hydrocortisone exposure on cell viability and cell morphology in chick embryonic neurons. Four different histological staining techniques namely, Hematoxylin and Eosin (H & E), Cresyl Fast Violet, Silver impregnation and a combination of Gold Chloride and Toluidine Blue were used to evaluate chick embryo neural tissue exposed to 0.137?? M or 0.685?? M hydrocortisone on day 3.75 (Carnegie stage 16) and day 5.5 (Carnegie stage 18) of development. Histological processing was optimized and neural tissue evaluated for any changes in neuron morphology and cell number. Specific ultrastructural changes to membraneous structures were evaluated by transmission electron microscopy (TEM). Fixation procedures that resulted in little to no disruption of these structures were optimized and used in studies evaluating the effect of hydrocortisone on neuron morphology. Primary chick embryonic neuronal cultures were prepared and increasing concentrations of hydrocortisone (26.3nM, 0.16?? M, 0.63?? M, 3.8?? M, and 22.8?? M) added. Fluorescence microscopy was applied to the in vitro hydrocortisone exposed primary neuronal cultures. A combination of fluorescein diacetate (FDA) and propidium iodide (PI) was used to evaluate the effect of hydrocortisone on cell viability, whereas dichlorodihydrofluorescein diacetate (DCH2FDA) was used to visualize reactive oxygen species (ROS) generation in neurons. Histological evaluation of the neural tissue of chick embryos exposed to 0.137?? M and 0.685?? M hydrocortisone showed reduced neuron density and morphological changes associated with cell death. Glutaraldehyde with added magnesium chloride (MgCl2) as stabilizing chemical and potassium permangenate were two fixatives that caused minimal disruption to neural tissue. These two fixating methods were applied to control neural tissue as well as tissues exposed to 0.137?? M and 0.685?? M hydrocortisone. When evaluated by TEM, the control tissue appeared to be intact with no displacement. Exposure of neurons to 0.137?? M hydrocortisone appeared to have severe effects on the morphology of the mitochondria, endoplasmic reticulum (ER), nuclear and plasma membranes. More extensive damage was noted with 0.685?? M hydrocortisone, leaving almost no cellular structure. Both concentrations of hydrocortisone indicated cell death associated with apoptosis and necrosis. In vitro studies using primary cultures of chick neurons indicated that hydrocortisone is non-toxic at low concentrations (26.3nM ; V 3.8?? M) with the percentage viability ranging between 73% and 88%. A more toxic effect was seen at high concentrations (22.8?? M). Cell death at the higher concentrations (22.8?? M and 3.8?? M) of hydrocortisone occurred due to ROS generation, as indicated by DCH2FDA fluorescence In conclusion, hydrocortisone indicated neurotoxicity at high concentrations of exposure. Although cell death could be detected, the exact mechanism (apoptosis or necrosis) still needs to be investigated. Since the developing brain is so susceptible to chemical insults care should be taken when administering this drug to pregnant mothers or young children.
Download or read book Research Grants Index written by National Institutes of Health (U.S.). Division of Research Grants and published by . This book was released on 1975 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Awards Index written by and published by . This book was released on 1978 with total page 1520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1966 with total page 1548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1971-12 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the National Cancer Institute written by and published by . This book was released on 1964 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metabolic Turnover in the Nervous System written by Sidney Roberts and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume V deals with the problems of turnover in the nervous system. "Turnover" is defined in different ways, and the term is used in different contexts. It is used rather broadly in the present volume, and intentionally so. The turnover of macromolecules is only one aspect; here "turnover" in dicates the simultaneous and coordinated formation and breakdown of macromolecular species. The complexities of cerebral protein turnover are shown in a separate chapter dealing with the synthesis of proteins, in another on breakdown, and in still another on the relationship of these two (showing how the two halves of turnover are controlled). The fact that most likely the two halves of protein turnover, synthesis and breakdown, are separated spatially and the mechanisms involved are different further emphasizes the complexity of macromolecular turnover. "Turnover" is used in a different context when the turnover of a cycle is discussed; but here again a number of complex metabolic reactions have to be interrelated and controlled; some such cycles are discussed briefly in this volume, additional cycles have been discussed with metabolism, and some cycles still await elucidation or discovery.
Download or read book Journal written by National Cancer Institute (U.S.) and published by . This book was released on 1964 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavioral Embryology written by Gilbert Gottlieb and published by Academic Press. This book was released on 2013-10-22 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Behavioral Embryology deals with the theoretical, philosophical, and empirical problems of behavioral embryology. The book is composed of studies on prenatal neural and behavioral development. The text discussed various topics on behavioral embryology such as the genetic aspects of neuro-embryology; prenatal ""organizing"" effect of gonadal hormones on the brain and later behavior; sensory, motor, or central neural function; overt embryonic or fetal sensitivity; and overt motility and actual behavior. Embryologists, anatomists, cell biologists, physiologists, physicians, and medical researchers will find the book invaluable.
Download or read book The Histogenesis of the Spinal Ganglia written by Ennio Pannese and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present review is based on the data of the literature, and on the personal experience gained by the author in recent years by studying the histogenesis of spinal ganglia. Probably, the reader will find more than one gap in the biblio graphy. The author would like to point out that in no case are such gaps due to the voluntary omission of any information, interpretations, or views. The gaps are due only to the difficulties met in trying to master such a vast literature consisting of so many contributions which have appeared over more than a century. An endeavour has been made to report not only the morphological data, but also, whenever possible, information derived from histochemical and biochemical studies. 11. Origin 01 the Spinal Ganglia Before 1868 it was generally thought (see, e.g., Remak, 1851; Bidder and Küpffer, 1857) that the spinal ganglia arise from the mesoblast of the protoverte brae (old term for somites). In 1868 His showed that the nerve cells of the spinal ganglia take their origin from the ectoderm, and more precisely from a thin band of ectoderm (Zwischenstrang, neural crest) flanking each side of the neural plate (Fig. 1 a) and interposed between it and the somatic ectoderm (Hornblatt). On this subject His (1879) wrote in a later paper " ... die spinalen Ganglien ... aus einem schmalen Substanz streifen hervorgehen, welche zwischen der Medullarplatte und dem Hornblatte gelegen ist und dessen Material ich als Zwischenstrang bezeichnet habe."
Download or read book Neurological Research Supported by the National Institute of Neurological Diseases and Stroke written by National Institute of Neurological Diseases and Stroke and published by . This book was released on 1969 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
