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Conrad Hal Waddington's Organisers and Genes, published in 1940, is a summary of available research and theoretical framework for many concepts related to tissue differentiation in the developing embryo. The book is composed of two main conceptual sections. The first section explores the action and nature of the organizer, while the second section delves into genes and their influence on development. In this book Waddington explored organizers in terms of their capacity and method of induction. First he examined the nature of induction, discussing crucial experiments concerning the organizer, including Hans Spemann's discovery of the organizer, and his own research into organizers in higher birds and mammals. Waddington separated the action of the organizer into two distinct categories, evocation and individuation, discussed below. The main experimental approach discussed in this book involved grafting organizing tissue from one embryo or region of an embryo to another. Waddington described evocation as non-assimilative induction, or a one-way inducing signal. He presented this as a chemical signal and illustrated evocation with the dead organizer experiment. The dead organizer was shown to be capable of inducing differentiation of neural tissue in the ectoderm. He also included chemical induction by estrogens and steroids as other evocative signals. An important aspect of any signal of evocation, as presented by Waddington, is that the signal is specific to the differentiation of a certain tissue type.
The organizer area plays a central role in the formation of the embryonic axis and the central nervous system of all vertebrates including the human fetus. In The Vertebrate Organizer, outstanding molecular development biologists and embryologists report their latest approaches in this fascinating research area using different vertebrate model organisms. The presented data is of central importance for the understanding of early human embryogenesis.
The Cell: Organisation, Functions and Regulatory Mechanisms is a textbook written for students and scholars studying cell biology at various levels. The study of cell biology is an essential component of the syllabi at undergraduate and postgraduate levels in universities and colleges that offer courses in biochemistry, biotechnology, genetics, molecular biology, immunology, zoology, botany, toxicology and medical, nursing, paramedical, pharmaceutical and agricultural sciences. This book provides a perfect blend of basic and applied knowledge in the area of cell sciences using the latest examples and experiments. It includes chapters on the structure and composition of the cell its constituent structures and molecules properties of these structures and molecules as well as the various regulatory mechanisms of cellular processes in both healthy and diseased states. The simplicity of the language used ensures that it can be understood by students who are non-native speakers of English and also by scholars who do not have an in-depth knowledge of the subject but would like to get acquainted with it while working in their respective areas of study.
This Series provides a comprehensive survey of the major topics in the field of developmental biology. The volumes are valuable to researchers in animal and plant development, as well as to students and professionals who want an introduction to cellular and molecular mechanisms of development. This year marks a major milestone for the Series as it completes its thirtieth year of publication, making it the longest-running forum for contemporary issues in developmental biology.
Widely regarded as the definitive reference in the field, Youmans and Winn Neurological Surgery offers unparalleled, multimedia coverage of the entirety of this complex specialty. Fully updated to reflect recent advances in the basic and clinical neurosciences, the 8th Edition covers everything you need to know about functional and restorative neurosurgery, deep brain stimulation, stem cell biology, radiological and nuclear imaging, and neuro-oncology, as well as minimally invasive surgeries in spine and peripheral nerve surgery, and endoscopic and other approaches for cranial procedures and cerebrovascular diseases. In four comprehensive volumes, Dr. H. Richard Winn and his expert team of editors and authors provide updated content, a significantly expanded video library, and hundreds of new video lectures that help you master new procedures, new technologies, and essential anatomic knowledge in neurosurgery. - Discusses current topics such as diffusion tensor imaging, brain and spine robotic surgery, augmented reality as an aid in neurosurgery, AI and big data in neurosurgery, and neuroimaging in stereotactic functional neurosurgery. - 55 new chapters provide cutting-edge information on Surgical Anatomy of the Spine, Precision Medicine in Neurosurgery, The Geriatric Patient, Neuroanesthesia During Pregnancy, Laser Interstitial Thermal Therapy for Epilepsy, Fetal Surgery for Myelomeningocele, Rehabilitation of Acute Spinal Cord Injury, Surgical Considerations for Patients with Polytrauma, Endovascular Approaches to Intracranial Aneurysms, and much more. - Hundreds of all-new video lectures clarify key concepts in techniques, cases, and surgical management and evaluation. Notable lecture videos include multiple videos on Thalamotomy for Focal Hand Dystonia and a video to accompany a new chapter on the Basic Science of Brain Metastases. - An extensive video library contains stunning anatomy videos and videos demonstrating intraoperative procedures with more than 800 videos in all. - Each clinical section contains chapters on technology specific to a clinical area. - Each section contains a chapter providing an overview from experienced Section Editors, including a report on ongoing controversies within that subspecialty. - Enhanced eBook version included with purchase. Your enhanced eBook allows you to access all of the text, figures, and references from the book on a variety of devices.
This book provides new insights into the universality of biological systems in animal reproduction and development by a comparative study of a variety of mechanisms in animals ranging from basal invertebrates to vertebrates, including mammals. Animals accomplish genetic diversity through meiosis and fertilization, and during embryogenesis animals must produce specialized cell types, including germ cells, in accordance with their individual body plan. This series of phenomena is essential to the continuity of life in the animal kingdom, and animals show various reproductive and developmental strategies. This volume, comprising four parts, reviews animal kingdom diversity, including reproductive strategies and germ cell differentiation mechanisms (Part 1), sex determination and differentiation (Part2), the mechanisms of fertilization (Part 3), and body axis formation (Part 4). Readers will find descriptions of the reproduction or development of 180 species, 13 phyla, 35 classes, 74 orders, 117 families, and 151 genera in this book. Of particular interest is the diversity of molecules and mechanisms used to achieve the same biological purpose in different animals. Undergraduates, graduate students, and professional scientists who want a deeper understanding of animal reproductive and developmental mechanisms will find this book to be of great value.
Genetic advocacy groups, science, and biovalue : creating political economies of hope / Carlos Novas -- Patients as public in ethics debates--interpreting the role of patient organizations in democracy / Annemiek Nelis, Gerard de Vries, and Rob Hagendijk -- From "scraps and fragments" to "whole organisms" : molecular biology, clinical research, and post genomic bodies / Susan E. Kelly -- Fashioning flesh : inclusion, exclusivity, and the potential of genomics / Fiona O'Neill -- Mapping origins : race and relatedness in population genetics and genetic genealogy / Catherine Nash
In the embryonic stage of a multicellular organism, precise arrangements of different cell types arise. These cell types eventually become the tissues and organs of the organism if it is an animal, for instance. Developmental biology is the study of this process in both plants and animals and covers the entire development stage of the organism. Current Topics in Developmental Biology provides a comprehensive survey of the major topics in this rapidly advancing field. The volumes are valuable to researchers in animal and plant development as well as to students and professionals who want an introduction to cellular and molecular mechanisms of development. With over thirty years of publication, this series is the longest-running forum for contemporary issues in developmental biology.
Advances in Genetics
Revised to incorporate the latest advances in the neurosciences and clinical neurology, the Seventh Edition of this classic text provides practical, cost-effective problem-solving approaches to all diseases affecting the developing nervous system. In clinically relevant terms, the book explains how recent developments in molecular biology, genetics, neurochemistry, neurophysiology, neuropathology, and neuroimaging impact on diagnosis and treatment. Chapters focus on specific disorders or groups of disorders and emphasize differential diagnosis, disease course, treatment, and prognosis. This edition has a new chapter on mitochondrial cytopathies.