Recent Developments In Insect Neurohormones
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Recent Developments In Insect Neurohormones
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Author : M. Raabe
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Recent Developments In Insect Neurohormones written by M. Raabe and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The most striking fact revealed by investigations of insect neurohormones is that insects are as well supplied with neurohormones as mammals, since neurohor mones regulate not only the functioning of the endocrine glands, prothoracic gland, and corpora allata, but also most physiological processes. Our knowledge of neurohormones developed originally from anat omocytological investigations and experimental studies. Today, accurate bio assays have been devised for studying both in vivo and in vitro physiological processes, and RIA determination has yielded knowledge of titer modifications of humoral factors. Much is also known about neurohormone purification, and several neurohormones have even been identified in different species. Immunocytochemistry has made it possible to demonstrate in their origin and release sites the presence of insect neurohormones whose structure has been elucidated. Moreover, the presence of vertebrate and invertebrate neuropeptides has been demonstrated in insects. As regards biogenic amines, methods of detection have been greatly refined and it is now possible to identify the cell bodies and axons of the main biogenic amines. Other new methods, such as cobalt chloride impregnation or Lucifer yellow staining, have revealed the axonal pathways and the location of particular neurons. The mechanisms of action of neurohormones have been investigated in several cases and the results of these investigations will be related in the chapters which follow.
Insect Neurohormones
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Author : Marie Raabe
language : en
Publisher: Springer
Release Date : 1982-08
Insect Neurohormones written by Marie Raabe and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982-08 with Science categories.
The discovery of insect neurohormones dates from the earliest experimental in vestigations in insect endocrines, and the matter cannot be discussed without evoking the names of its pioneers-Kopec, Wigglesworth, Fraenkel. Whereas the experiments demonstrated the existence of the first known neurohormones, the formulation of the concept of neurosecretion was of fundamental importance to further progress, and tribute must be paid to Ernst and Berta Scharrer. The recent proliferation of investigations into insect neurohormones has cre ated the need for an overall review of the data. Our knowledge of the subject is voluminous, and the evidence clearly demonstrates that neurohormones playa part in most insect regulatory processes. This book analyzes and synthesizes the data, starting from neurosecretion (i.e., source sites and release modes of neurohormones) and continuing through the various functions in which neurohormones have been shown to be involved: endocrine gland activity; diapause; reproduction; visceral muscle functioning; color change; behavior; water and ion balance; protein, sugar, and lipid metabo lism; and tanning and other processes occurring at the cuticle level. In each chapter, besides the experimental information, technical procedures as well as recent information concerning purification of the particular neurohor mones and their mode of action are reported. Numerous exhaustive tables allow the reader to get an overview of the matter while the major findings of the mo ment are presented in the conclusion of each chapter.
Insect Neurochemistry And Neurophysiology
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Author : A. B. Borkovec
language : en
Publisher: Springer
Release Date : 1984-04
Insect Neurochemistry And Neurophysiology written by A. B. Borkovec and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984-04 with Science categories.
The function of the central nervous system as a coordinator and regulator of cellular processes in multicellular organisms is unequivocal. Until recently, however, the chemical evidence necessary for validating speculations on neurophysiological function in inverte brates has been lacking. In insects, because of their small size, heroic efforts were needed to collect the millions of tissues or organs necessary for isolation and identification of neurochemicals. With the spec tacular advances in physical and analytical technology within the last decade and with significant advances in radiochemical, radioimmunological and neurophysiological assays, researchers are, for the first time, able to handle microgram and nanogram quantities of complex biological substances. More recent developments in immunology promise to lower these levels further. It is not surprising that these new opportunities accelerated progress in insect neuroscience and that the time was right for a rapid and personal exchange of ideas and information on techniques. These considerations were the primary impetus for convening the International Conference on Insect Neurochemistry and Neurophysiology (ICINN) at the University of Maryland, College Park, MD, on August 1-3, 1983.
Neurohormonal Techniques In Insects
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Author : T.A. Miller
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Neurohormonal Techniques In Insects written by T.A. Miller and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Insects as a group occupy a middle ground in the biosphere between bac teria and viruses at one extreme, amphibians and mammals at the other. The size and general nature of insects present special problems to the student of entomology. For example, many commercially available in struments are geared to measure in grams, while the forces commonly en countered in studying insects are in the milligram range. Therefore, tech the study of insects or in those fields concerned with niques developed in the control of insect pests are often unique. Methods for measuring things are common to all sciences. Advances sometimes depend more on how something was done than on what was measured; indeed a given field often progresses from one technique to another as new methods are discovered, developed, and modified. Just as often, some of these techniques find their way into the classroom when the problems involved have been sufficiently ironed out to permit students to master the manipulations in a few laboratory periods. Many specialized techniques are confined to one specific research labo ratory. Although methods may be considered commonplace where they are used, in another context even the simplest procedures may save con siderable time. It is the purpose of this series (1) to report new develop ments in methodology, (2) to reveal sources of groups who have dealt with and solved particular entomological problems, and (3) to describe ex periments which might be applicable for use in biology laboratory courses.
Hormones And Metabolism In Insect Stress
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Author : Jelisaveta Ivanovic
language : en
Publisher: CRC Press
Release Date : 2018-01-31
Hormones And Metabolism In Insect Stress written by Jelisaveta Ivanovic and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-31 with Science categories.
This book discusses the effects of both natural (e.g., temperature, humidity, and lack of food) and man-induced stressors (e.g., pollution) on insects. Insect neurohormones and metabolism are emphasized, although all aspects of insect biology are examined. The role of ecdysteroids and juvenile hormones in response to thermal and other stressors is featured, and population studies in insect stress are presented. Entomologists, ecologists, ecophysiologists, physiologists, applied entomologists and others will find Hormones and Metabolism in Insect Stress an important reference resource.
Insect Hormones And Bioanalogues
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Author : K. Slama
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Insect Hormones And Bioanalogues written by K. Slama and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The application of organic insecticides in the agrotechnical praxis resulted in a great and unexpected progress in the control of insect pests, and was of a great economical value all over the world. The widespread application of these agents, however, is also accompanied by negative effects. The principal drawback of classical insecticides consists in the lack of their specificity, the useful insects being killed together with insect pests. Furthermore, the broad-scale application for many years led to the formation of more resistant insect strains requiring higher and higher doses of insecticides. The residues of the mostly used chlorinated compounds accumulate in human and animal foods producing directly or indirectly harmful effects in human sub jects. The critical situation led in many developed countries to the restriction in the usage of some types of classical insecticides. Under these circumstances it is quite natural that novel routes for the control of insect pests are investigated. In this connection, attention has been paid especially to the insect endocrinology and insect hormones which regulate the admirable and in many regards specific development from the egg to the adult insect. The recent successful discoveries in this field are thus in close relation to the practical requirements. Isolation and identification of moulting hor mones and juvenile-hormone-like naturally occurring substances not only made possible an exact investigation of their physiological effects but also stimulated the chemical research.
Recent Advances In Insect Physiology And Toxicology
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Author : G. T. Gujar
language : en
Publisher:
Release Date : 1994
Recent Advances In Insect Physiology And Toxicology written by G. T. Gujar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Insect-plant relationships categories.
Festschrift honoring K.N. (Kailash Narain) Mehrotra, b. 1930, former head of the Entomology Division of Indian Agricultural Research Institute, New Delhi, upon his retirement in 1990; comprises contributed research papers on insect physiology and toxicology.
Neuropeptide Systems As Targets For Parasite And Pest Control
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Author : Timothy G. Geary
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-01-13
Neuropeptide Systems As Targets For Parasite And Pest Control written by Timothy G. Geary and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01-13 with Medical categories.
The need to continually discover new agents for the control or treatment of invertebrate pests and pathogens is undeniable. Agriculture, both animal and plant, succeeds only to the extent that arthropod and helminth consumers, vectors and pathogens can be kept at bay. Humans and their companion animals are also plagued by invertebrate parasites. The deployment of chemical agents for these purposes inevitably elicits the selection of resistant populations of the targets of control, necessitating a regular introduction of new kinds of molecules. Experience in other areas of chemotherapy has shown that a thorough understanding of the biology of disease is an essential platform upon which to build a discovery program. Unfortunately, investment of research resources into understanding the basic physiology of invertebrates as a strategy to illuminate new molecular targets for pesticide and parasiticide discovery has been scarce, and the pace of introduction of new molecules for these indications has been slowed as a result. An exciting and so far unexploited area to explore in this regard is invertebrate neuropeptide physiology. This book was assembled to focus attention on this promising field by compiling a comprehensive review of recent research on neuropeptides in arthropods and helminths, with contributions from many of the leading laboratories working on these systems.
Advances In Insect Physiology
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Author :
language : en
Publisher: Academic Press
Release Date : 2009-10-14
Advances In Insect Physiology written by and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-10-14 with Science categories.
Advances in Insect Physiology publishes volumes containing important, comprehensive and in-depth reviews on all aspects of insect physiology. It is an essential reference source for invertebrate physiologists and neurobiologists, entomologists, zoologists and insect biochemists. First published in 1963, the serial is now edited by Steven Simpson and Jerome Casas to provide an international perspective. This volume is a thematic volume focusing on locust phase polyphenism. * Contributions from the leading researchers in entomology * Discusses the physiological diversity in insects * Includes in-depth reviews with valuable information for a variety of entomology disciplines
Insect Neuroendocrines
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Author : V.B. Awasthi
language : en
Publisher: Scientific Publishers
Release Date : 2005-04-01
Insect Neuroendocrines written by V.B. Awasthi and has been published by Scientific Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-04-01 with Technology & Engineering categories.
The aim of the author has been to present an account of the neuroendocrine system of insects, the super importance of which is well established, and also to provide information as far as possible directly, through the ultrastructural illustrations. Besides, an account of some of the hormonally controlled phenomena of vital significance is given. It is hoped that the theoretical account, and a large number of ultrastructural illustrations of some of the prominent pioneer authors included in the book, will provide ample information to the post graduate students and research scholars of insect neuroendocrinology as well as to those engaged in carrying out researches on comparative endocrinology, insect ethology, cell biology and developmental biology in various universities and acquaint them well with almost all the components of the neuroendocrine system in the active, inactive and various developmental stages, alongwith ultrastructural changes occurring in the cells and their organelles, that are associated with specific functions. I do hope that the book will stimulate the readers and serve as a "text book cum basic research monograph'' on the subject. The book also contains a list of selected bibliography for a detailed study.