The Significance Of Zoochromes

The Significance Of Zoochromes Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of The Significance Of Zoochromes book. This book definitely worth reading, it is an incredibly well-written.

The Significance of Zoochromes

A.E. Needham
The Significance of Zoochromes Book PDF

Author : A.E. Needham
Publisher : Springer Science & Business Media
Page : 434 pages
File Size : 55,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642807664

Get Book

The Significance of Zoochromes by A.E. Needham Pdf

As the title indicates, the theme of this book is the functions of biochromes in animals. Recent works on zoochromes, such as those of D. L. Fox (1953), H. M. Fox and VEVERS (1960) and VUILLAUME (1969), have been concerned primarily with the chemical nature and the taxonomic distribution of these materials, and although function has been considered where relevant this has not been the centre of interest and certainly not the basis for the arrangement of the subject matter. Functional significance is a profitable focus of interest, since it is the one theme which can make biochromatology a discrete and integral subject, and because it is the main interest in all biological fields. At present chromatology seems to be a particularly schizoid subject since it is clear that in metabolic functions biochromes are acting in a chemical capacity whereas integumental pigments function mainly biophysically, in neurological and behavioural contexts. It is profitable to attempt an integration by studying the functions of as many chromes as possible, from all aspects.

Biology of the Arthropod Cuticle

A.C. Neville
Biology of the Arthropod Cuticle Book PDF

Author : A.C. Neville
Publisher : Springer Science & Business Media
Page : 460 pages
File Size : 52,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642809101

Get Book

Biology of the Arthropod Cuticle by A.C. Neville Pdf

Mention the words 'arthropod cuticle' to most biologists and they usually provoke a glazed expression. This is because the cuticle is commonly regarded as an inert substance. It is hoped that this book will dispel this fallacy. The study of cuticle in its proper context now involves many of the wider aspects of biology which are currently in vogue (e. g. how a hormone like ecdyson induces a specific enzyme like dopa decarboxylase; the unsolved major problem of cell gradient and polarity; the involvement of cyclic AMP in hormonal mechanisms; the extra cellular control of cuticular enzymes, of the mechanical proper ties of cuticle structural proteins, and of the orientation of fibrous molecules; and the relation of chromosome puffing to the synthesis of specific proteins). Studies on cuticle demand a variety of techniques, and examples of the following are illustrated in this book (fluorescence, phase contrast, polariza tion and Nomarski interference microscopy; infrared absorp tion; transmission and scanning electron microscopy; autora diography analyzed by electron microscopy; negative staining in the electron microscope; optical diffraction, high angle X-ray diffraction, low angle X -ray diffraction and selected area electron diffraction). I am well aware that the biophysical parts of this book are less incomplete than other aspects. A developmental biologist or a biochemist would have further elaborated other parts ofthe subject matter. Only one previous author, RICHARDS (1951)hasdevoted a book to arthropod cuticle.

African Ungulates

Walter Leuthold
African Ungulates Book PDF

Author : Walter Leuthold
Publisher : Springer Science & Business Media
Page : 312 pages
File Size : 48,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642810732

Get Book

African Ungulates by Walter Leuthold Pdf

This book has been written mostly within sight of wild African ungulates, at the research center in Tsavo East National Park, V oi, Kenya. While this had many positive aspects, there were also a few drawbacks. The main one of these is the fact that Voi is not exactly at the hub of scientific activity, even if we restrict ourselves to African ungulates. Thus, whereas I had felt initially that I was sufficiently familiar with ethological work on these animals to write a useful review, it soon became woefully evident that this assumption was erroneous. Over the last few years studies on African ungulates have pro liferated and results are being published in journals almost all over the world. My location in East Africa was sometimes less than ideal with respect to access to the most recent literature, and I depended to a considerable extent on the goodwill of colleagues in giving or lending me relevant papers. I am happy to report that I received a great deal of support and cooperation in this respect. Nevertheless, I may have over looked some important papers inadvertently; their authors should not feel slighted by such omissions, which only reflect availability of literature to me. Readers may also notice a considerable geographical bias in favor of East Africa, at the expense of other African regions, particularly South Africa.

Olfactory Imprinting and Homing in Salmon

A.D. Hasler,A.T. Scholz
Olfactory Imprinting and Homing in Salmon Book PDF

Author : A.D. Hasler,A.T. Scholz
Publisher : Springer Science & Business Media
Page : 152 pages
File Size : 44,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642820700

Get Book

Olfactory Imprinting and Homing in Salmon by A.D. Hasler,A.T. Scholz Pdf

Chance Favors Only the Prepared Mind How does a scientist go about the task of pushing back the curtains of the unknown? Certainly the romance of tackling the mysteries of nature provides the motivation, for who would not be inspired by the remarkable life history of this romantic beast, the salmon. After living in the Pacific Ocean for several years, salmon swim thousands of kilometers back to the stream of their birth to spawn. I have always been fascinated by the homing migration of salmon. Noone who has seen a 20-kilogram salmon fling itself into the air repeatedly until it is exhausted in a vain effort to surmount a waterfall can fail to marvel at the strength of the instinct that draws the salmon upriver to the stream where it was born. But how does it find its way back? I was puzzling over this problem during a family vacation in 1946. Inspired by the work of the great German Nobel Laureates, Karl von Frisch and Konrad Lorenz, I had been conducting research with my graduate student Theodore Walker, since 1945, on the ability of fishes to discriminate odors emanating from aquatic plants. Von Frisch had studied schooling minnows and discovered that, if broken, their skin emitted a con specific chemical substance, termed Schreckstoff, which caused other members of its school to disperse and hide.

Water Balance in Land Arthropods

E. B. Edney
Water Balance in Land Arthropods Book PDF

Author : E. B. Edney
Publisher : Springer Science & Business Media
Page : 295 pages
File Size : 40,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642811050

Get Book

Water Balance in Land Arthropods by E. B. Edney Pdf

Writers on arthropod water relationships range from bio physicists and biochemists to population ecologists-a fact that gives cause to wonder whether the field is already too heterogeneous to be written about in a single book by a single author. I have partly avoided the problem by concentrating largely on physiological mechanisms and by omitting most aspects of behavioural regulation and most aspects of heat balance and body temperature, except when these impinge directly on water balance. Even within this limited field there has been a lot of work during the past twenty years, as a result of which some problems have been solved (or at least more clearly defined), and many others have been opened up. On the whole there has been a welcome change to a more rigorous experimental approach and it is now possible for water balance people to state their problems in physiological terms. Good progress has been made towards understanding the mechanisms involved in nearly all avenues of water uptake and loss, although problems indeed remain. The cuticle has yielded part of its secrets to electron micrography, but ex ploration by means oflipid biochemistry among other techniques is necessary for a real understanding of cuticle permeability.

Effects of Temperature on Ectothermic Organisms

Wolfgang Wieser
Effects of Temperature on Ectothermic Organisms Book PDF

Author : Wolfgang Wieser
Publisher : Springer Science & Business Media
Page : 295 pages
File Size : 53,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642657030

Get Book

Effects of Temperature on Ectothermic Organisms by Wolfgang Wieser Pdf

The study of thermoregulation in endotherms has contributed much to the emergence of the concept of control theory in biology. By the same token, the study of tempera ture adjustment in ectotherms is likely to have a far-reaching influence on ideas on the regulation of metabolism in general. The reason for this is that ectotherms, in adapting to the vagaries of a thermally unstable environment, deploy a range of subtle molecular and organismic strategies. Thus the experimenter, using temperature changes as a tool, is well equipped to analyze some of these strategies. This approach has enabled some important mechanisms of temperature-induced adaptation to be elucidated; the most striking of these are the effects on metabolism of changes in the conformation of enzymes and the transfer properties of membranes. Furthermore, there is a vague but persistent feeling among those working in this field that changes in the nervous system will ultimately prove to be the agency by which many of the molecular mechanisms of temperature adaptation are controlled. Should this indeed be the case, a new phase would soon begin in our understanding of the interactions between the systemic and the cellular levels of organization. However, it is not only questions about the causes of temperature adaptation that can provide answers of potential importance to the general biologist; of equal significance are questions as to the meaning of temperature adaptation in a particular organism.

National Library of Medicine Current Catalog

National Library of Medicine (U.S.)
National Library of Medicine Current Catalog Book PDF

Author : National Library of Medicine (U.S.)
Publisher : Unknown
Page : 1242 pages
File Size : 40,8 Mb
Release : 1974
Category : Medicine
ISBN : UOM:39015007732251

Get Book

National Library of Medicine Current Catalog by National Library of Medicine (U.S.) Pdf

First multi-year cumulation covers six years: 1965-70.

Proceedings of the Third International Symposium on Trichoptera

G.P. Moretti
Proceedings of the Third International Symposium on Trichoptera Book PDF

Author : G.P. Moretti
Publisher : Springer Science & Business Media
Page : 470 pages
File Size : 49,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400986411

Get Book

Proceedings of the Third International Symposium on Trichoptera by G.P. Moretti Pdf

G.P. MORETTI The Triennial Symposium of Trichoptera would seem to have become a regular event on the calendar. Initiated by Prof. Malicky at Lunz in Austria in 1974, they continued at Reading in England in 1977 (Convenor: Dr M.I. Crichton), the last, this year, took place in Perugia, Italy (Convenor: Prof. G.P. Moretti) and the next will be hosted by Dr J.C. Morse in Clemson, U.S.A. in 1983. The most outstanding points of the 3rd International Symposium on Trichoptera held at Perugia from July 28 to August 2, 1980 were I) the high number of participants; 2) the extent, scientific interest and coverage of the papers presented and 3) the warmth and immediate contact which drew everyone together from the first moment. Twenty-one nations (Australia, Austria, Belgium, Bulgaria, Canada, Czechoslavakia, Denmark, France, Germany-F.G.R., Germany-G.D.R., Hungary, Iceland, Italy, Mexico, Netherlands, Poland, Spain, Sweden, Switzerland, United Kingdom, United States) were represented by a total of 63 trichopterologists who presented 54 papers and 8 posters during in 8 sessions chaired by M.I. Crichton, H. Malicky, A. Nielsen, O. Flint, L.

Ecophysiology of Spiders

Wolfgang Nentwig
Ecophysiology of Spiders Book PDF

Author : Wolfgang Nentwig
Publisher : Springer Science & Business Media
Page : 450 pages
File Size : 51,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642715525

Get Book

Ecophysiology of Spiders by Wolfgang Nentwig Pdf

Recently another book on insect physiology was published. It was restricted to a few focal points as are many of these new insect physiology books, but there was considerable depth in its specialized point of view. We were dis cussing the structure of this book and of insect physiology books, in general, when Prof. Remmert asked me " . . . and what about books on spider physio logy?" Silence. Then I started to explain "oh yes, there is a congress pro ceedings volume on this topic and there is a group with excellent publica tions on another topic . . . ", but I felt that this answer was weak. One can no longer buy the proceedings volume in a bookshop and to read a series of publications on a given topic one must search in a library for a dozen journals. Why is there not a single book on spider physiology comparable with the many books on insect physiology? Are spiders a scientific ivory tower, far from public interest and commercial importance? I do not think so, although spiders are one of the many "forgotten" animal groups which always grew in the shadow of the insects. There are research groups working on spider physiology, there are fascinating phenomena in this animal group and there are plenty of exciting results. Spiders may have been always underresearch ed, but research is progressing. In the last few years, new books have been published, e. g.

Concealing Coloration in Animals

Judy Diamond
Concealing Coloration in Animals Book PDF

Author : Judy Diamond
Publisher : Harvard University Press
Page : 284 pages
File Size : 42,5 Mb
Release : 2013-04-09
Category : Nature
ISBN : 9780674074200

Get Book

Concealing Coloration in Animals by Judy Diamond Pdf

Color can attract mates, intimidate enemies, and distract predators. But it can also conceal animals from detection. It is an adaptation to the visual features of the environment but also to the perceptual and cognitive capabilities of other organisms. Judy Diamond and Alan Bond reveal factors at work in the evolution of concealing coloration.

Patterns of Vertebrate Biology

E.W. Jr. Jameson
Patterns of Vertebrate Biology Book PDF

Author : E.W. Jr. Jameson
Publisher : Springer Science & Business Media
Page : 485 pages
File Size : 45,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461381037

Get Book

Patterns of Vertebrate Biology by E.W. Jr. Jameson Pdf

This book grew from a series of lectures on vertebrate natural history. The topics have been developed over a period of nearly 30 years, and today scarcely resemble the original subject matter. The progress is primarily technical. Some concepts provide a synthetic framework for viewing much modern research, but many of these concepts either date from Darwin or have developed from obser vations of later students. Animal science courses follow a sequential pattern in which there are three discrete levels of undergraduate instruction. Initially, students study subject mat ter contained in such courses as biology and general zoology. These courses intro duce students to animal phylogeny, basic plans of morphology and certain phys iological aspects; incidental to these subjects the student acquires a broad zoological vocabulary. At the other end of the academic spectrum are courses that emphasize synthe sis and theory: evolution, zoogeography, behavior and ecology are important courses whose role is to explore the relationships of various aspects of the physical and biological world. In these courses theory and analysis prevail. They are not, however, essentially "subject matter" courses with distinct bodies of knowledge.

The Biochemistry of Natural Pigments

G. Britton,George Britton
The Biochemistry of Natural Pigments Book PDF

Author : G. Britton,George Britton
Publisher : Cambridge University Press
Page : 396 pages
File Size : 41,9 Mb
Release : 1983-03-10
Category : Science
ISBN : 0521248922

Get Book

The Biochemistry of Natural Pigments by G. Britton,George Britton Pdf

This book describes the structures and properties of the main groups of natural pigments.

Spermatophores

T. Mann
Spermatophores Book PDF

Author : T. Mann
Publisher : Springer Science & Business Media
Page : 233 pages
File Size : 48,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642823084

Get Book

Spermatophores by T. Mann Pdf

Physiology and biochemistry of male reproductive function and semen became the main area of my research in 1944, after my attention was finally diverted frorp. animal cells in general, to mammalian spermatozoa specifically~ Ever since, the interest has remained largely focussed on reproductive probletns in mammals, the work continuing mostly at the University of Cambridge, where I was privileged to hold also the Marshall Walton Professorship in Physiology of Reproduction. This work led to the publication of three books, The Biochemistry of Semen (Methuen 1954), The Biochemistry of Semen and of the Male Reproductive Tract (Methuen 1964) and lately, in co authorship with my wife, Dr. Cecilia Lutwak-Mann, Male Re productive Function and Semen - Themes and Trends in Phys iology, Biochemistry and Investigative Andrology (Springer Verlag 1981). In 1960, thanks to the Lalor Foundation, I was able to avail myself for the first time of a chance to visit the Marine Biological Laboratory at Woods Hole and there to take part in a study of reproduction in marine animals. Ever since, first as Visiting Professor of Biology at the State University of Florida, and later as the Walker Ames Professor and frequent visitor to the Department of Zoology at the University of Washington in Seattle, it has been my good fortune to sustain this pew interest and to pursue it further.

Autonomic Nerve Function in the Vertebrates

S. Nilsson
Autonomic Nerve Function in the Vertebrates Book PDF

Author : S. Nilsson
Publisher : Springer Science & Business Media
Page : 267 pages
File Size : 48,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642819742

Get Book

Autonomic Nerve Function in the Vertebrates by S. Nilsson Pdf

The intention of this book is to offer a comprehensive description and discussion of autonomic nerve function in the vertebrates from several points of view. Sections on anatomy, biochemistry of the transmitter substances and the structure, physiology and pharmacology of the different types of autonomic neurons have been included, together with chapters dealing with the autonomic nervous control of some organs and organ systems in the different vertebrate groups. Although knowledge in several of these areas is based primarily on studies of mammals, a certain emphasis has been placed on the autonomic nerve functions in the non-mammalian vertebrates to describe, from a comparative physiological point of view, the adaptations and possible "phylogenetic trends" in the development of the autonomic nerve functions in the vertebrates. It is very obvious that the literature created by the vigorous research activities within the fields of autonomic nervous anatomy, histochemistry, biochemistry, pharmacology and physiology is vast indeed, and not all aspects of the subject may have received fair treatment in the present volume. With an analogy from astronomy, it is hoped that the mass compressed into this book has reached the level of an energy-emitting neutron star, rather than the black hole which would be the result of compressing too large a mass.

The Control of Fish Migration

R.J.F. Smith
The Control of Fish Migration Book PDF

Author : R.J.F. Smith
Publisher : Springer Science & Business Media
Page : 258 pages
File Size : 54,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642823480

Get Book

The Control of Fish Migration by R.J.F. Smith Pdf

Fish migration is important and spectacular. Migratory fish gather energy in one portion of the environment and transport it to other areas, where it often becomes available to humans or to other elements in the ecosystem. Migration brings fish into situations that allow easy harvest as they concentrate along migration routes. Their journeys also make them vulnerable to human intereference at critical points along their route. Salmon, for example, may harvest plankton in the open ocean and transport that food energy to coastal and inland regions, where it is captured by fisheries or deposited in inland streams and utilized by the flora and fauna of the region. These salmon are able to complete journeys of thousands of kilometers from their natal streams to oceanic feeding grounds and back to the same home streams, an accomplishment that strains our credi bili ty . We now understand some of the timing and guiding stimuli used in these migrations, and mechanisms can be logically proposed, on the basis of the established abilities of fishes, to account for the unexplained portions of the migrations. There is no single factor guiding these fish. Instead, they are dependent on the presence in their environment of a great variety of appropriate orienting and timing stimuli. These stimuli are vulnerable to human interference. The more widespread and easily available the information on these requirements, the more readily fish can be protected from such interference.