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Author: Conrad Hal Waddington
Publisher:
ISBN:
Category : Embryology
Languages : en
Pages : 182
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Book Description
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.
Author: Conrad Hal Waddington
Publisher:
ISBN:
Category : Embryology
Languages : en
Pages : 182
Get Book Here
Book Description
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.
Author:
Publisher: Elsevier
ISBN: 0128237600
Category : Science
Languages : en
Pages : 172
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Book Description
Organizers in Development, Volume 157 in the Current Topics in Developmental Biology series, highlights new advances in the field, with this new volume presenting interesting chapters on topics such as The organizer: what it meant, and means, to developmental biology, Organizers/signaling regions that pattern the limb, Organizers/signaling regions in the branchial arches, The notochord/floor plate as a possible organizer, Transport and gradient formation of Wnt and Fgf in the early zebrafish gastrula, and more. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in the Current Topics in Development Biology series - Updated release includes the latest information on Organizers in Development
Author: Mary L. Ohmer
Publisher: SAGE Publications
ISBN: 1544302703
Category : Social Science
Languages : en
Pages : 433
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Book Description
"The world is changing rapidly and the practice of community organizing needs to change with it. Representing both an homage to, and a departure from the "alinsky traditions" of organizing, Consensus Organizing offers techniques that are specifically designed for urban and rural communities struggling to succeed in the global economy and the information age. Ohmer and DeMasi are experienced organizers who offer a relentlessly thorough examination of the process of bringing diverse communities together to make change and to bridge the ethnic and economic divisions that keep many communities from succeeding." —Bill Traynor Executive Director, Lawrence CommunityWorks Inc. A person doesn′t have to be a consensus organizer to think like one. Consensus Organizing: A Community Development Workbook—A Comprehensive Guide to Designing, Implementing, and Evaluating Community Change Initiatives helps students and practitioners begin to think like consensus organizers and incorporate this way of strategic thinking into their lives and their work. Through a wide range of exercises, role-play activities, case scenarios, and discussion questions, this workbook presents the conceptual framework for consensus organizing and provides a practical and experiential approach to understanding and applying consensus organizing to address a range of issues. This workbook is designed to be used by itself or along with Mike Eichler′s text Consensus Organizing: Building Communities of Mutual Self Interest (SAGE, 2007). Key Features and Benefits Provides a step-by-step guide on how to conduct a community analysis of both internal and external neighborhood resources Brings consensus organizing to life through case studies based on the real-life experiences of the authors Offers field exercises that engage the reader in applying and practicing consensus organizing Provides practical tools that community organizers and practitioners can use in their daily work Includes a sample job description, work plan, monitoring report, and field report for hiring and supervising consensus organizers Presents tools for describing and evaluating consensus organizing and community-level interventions Accompanying Website Instructors and students have access to the many activities and cases on the accompanying website.
Author: Hahrie Han
Publisher: Oxford University Press, USA
ISBN: 0199336776
Category : Business & Economics
Languages : en
Pages : 251
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Book Description
Why are some civic associations better than others at getting-and keeping-people involved in activism? Using in-person observations, surveys, and field experiments, this book compares and describes contemporary models for engaging activists to show the effectiveness of one that combine political activism with transformative personal and collective growth.
Author: Alexandra Bradbury
Publisher:
ISBN: 9780914093077
Category :
Languages : en
Pages :
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Book Description
Author: Classroom Complete Press
Publisher: Classroom Complete Press
ISBN: 1771673834
Category : Education
Languages : en
Pages : 61
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Book Description
58 color reproducible graphic organizers to help your students comprehend any book or piece of literature in a visual way. Our graphic organizers enable readers to see how ideas fit together, and can be used to identify the strengths and weaknesses of your students' thought processes. Our graphic organizers are essential learning tools that will help your students construct meaning and understand what they are reading. They will help you observe your students' thinking process on what you read as a class, as a group, or independently, and can be used for assessment. They include: Story Maps, Plot Development, Character Webs, Predicting Outcomes, Inferencing, Foreshadowing, Characterization, Sequencing Maps, Cause-Effect Timelines, Themes, Story Summaries and Venn Diagrams.
Author: Isabelle S. Peter
Publisher: Academic Press
ISBN: 0124047467
Category : Science
Languages : en
Pages : 461
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Book Description
Genomic Control Process explores the biological phenomena around genomic regulatory systems that control and shape animal development processes, and which determine the nature of evolutionary processes that affect body plan. Unifying and simplifying the descriptions of development and evolution by focusing on the causality in these processes, it provides a comprehensive method of considering genomic control across diverse biological processes. This book is essential for graduate researchers in genomics, systems biology and molecular biology seeking to understand deep biological processes which regulate the structure of animals during development. - Covers a vast area of current biological research to produce a genome oriented regulatory bioscience of animal life - Places gene regulation, embryonic and postembryonic development, and evolution of the body plan in a unified conceptual framework - Provides the conceptual keys to interpret a broad developmental and evolutionary landscape with precise experimental illustrations drawn from contemporary literature - Includes a range of material, from developmental phenomenology to quantitative and logic models, from phylogenetics to the molecular biology of gene regulation, from animal models of all kinds to evidence of every relevant type - Demonstrates the causal power of system-level understanding of genomic control process - Conceptually organizes a constellation of complex and diverse biological phenomena - Investigates fundamental developmental control system logic in diverse circumstances and expresses these in conceptual models - Explores mechanistic evolutionary processes, illuminating the evolutionary consequences of developmental control systems as they are encoded in the genome
Author: Sandra Parks
Publisher: Critical Thinking Company
ISBN: 9780894553547
Category : Cognition in children
Languages : en
Pages : 307
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Book Description
A wide variety of complete, easy-to-use graphic organizer activities help students apply thinking skills to lessons in language arts, writing, social studies, math, science, music, art, and personal problem solving. Includes lesson plans and reproducible organizer activities.
Author: National Academy of Sciences
Publisher: National Academies Press
ISBN: 0309060311
Category : Biography & Autobiography
Languages : en
Pages : 388
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Book Description
Biographic Memoirs: Volume 73 contains the biographies of deceased members of the National Academy of Sciences and bibliographies of their published works. Each biographical essay was written by a member of the Academy familiar with the professional career of the deceased. For historical and bibliographical purposes, these volumes are worth returning to time and again.
Author: Katherine S. McKnight
Publisher: John Wiley & Sons
ISBN: 111841666X
Category : Education
Languages : en
Pages : 247
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Book Description
100 ready-to-use graphic organizers that help elementary students learn Graphic organizers are a powerful metacognitive teaching and learning tool and this book features 100 graphic organizers for teachers in grades K-5—double the number of any other book on the market. These graphic organizers can be used as before learning, during learning, or after learning activities, and support students' learning in the major content areas: English language arts, science, social studies, and mathematics. Teachers can use each graphic organizer as-is or customize for their own classroom's unique needs. Tips for classroom implementation and information on how the tool supports learning A Difficulty Dial that indicates the complexity of each graphic organizer Two Student Samples demonstrating how the organizer may be used with younger and older students This book gives teachers in grades K-5 a powerful way to help students understand relationships between facts, terms, and ideas.
