Resultados de Pesquisa

INGLÊS

Hearing - The Brain And Auditory Communication In Marsupials

de L. (Monash University, Melbourne, Australia) Aitkin

~~135,18€~~ 94,63€ 30% IMEDIATO

portes grátis

 This work documents various studies on hearing in marsupials and relates this information to their vocal behaviour. The organization of the brain auditory pathways of marsupials is compared with those of eutherian mammals and related to the structure of the periphery.
INGLÊS

The Gas Exchangers - Structure, Function, And Evolution Of The Respiratory Processes

de John N. (University Of The Witwatersrand) Maina

~~97,34€~~ 68,14€ 30% IMEDIATO

portes grátis

 The factors which set the metabolic potentials of animals have been decisive determinants of the constructions of the gas exchangers. This manual takes a look at the designs of gas exchangers, including gas exchange media, respiratory states and environments, water breathing and bimodal breathing.
INGLÊS

Hearing - The Brain And Auditory Communication In Marsupials

de Lindsay Aitkin

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This monograph evolved from years of research into the auditory pathway and hearing of many species of marsupials.
INGLÊS

Gas Exchangers - Structure, Function, And Evolution Of The Respiratory Processes

de John N. Maina

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The increasing wealth of data makes it possible to broaden the information base and meaning- fully synthesize, rationalize, reconcile, redefine, consolidate, and offer empirical validation of some of the earlier anecdotal views and interpretations, helping resolve the issues into adequately realistic and easily perceptible models.
INGLÊS

Renin-Angiotensin System - Comparative Aspects

de Hideshi Kobayashi e Yoshio Takei

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The renin-angiotensin system and the mechanisms regulating this system developed during the adaptive evolution of verte- brates, along with many other systems involved in the in- tegrated survival of the organism.
INGLÊS

Fishes Of The Amazon And Their Environment - Physiological And Biochemical Aspects

de A.L. Val e V.M.F.De Almeida-Val

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The Amazon is a giant piece of "amphibian" land which is the result of complex geological and evolutionary processes. We hope that this book is useful for comparative physiologists, tropical biologists, and the people interested in interactions between organ- isms and their environment.
INGLÊS

Magnetic Orientation In Animals

de Roswitha Wiltschko

127,86€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Biological effects of magnetic fields have been studied in many animals and plants. The magnetic fields were of a wide intensity range and, as alternating fields, of a wide frequency range and of a variety of impulse shapes. Effects on the cellular level, on bio chemical processes, growth and development, interactions with physiology, sensory input, reflexes and rhythm control, to name just a few, have been reported. Numerous magnetically induced changes in behavior have also been described. Recently, the amount of literature covering biological effects of magnetic fields has been rapidly increasing. By now it has grown to such an extent that it can no longer be covered in one volume. Most reviews specialize and focus on particular aspects and/or types of fields or effects. For example, the book edited by MARET et al. (1986) gives an overview on biological effects of steady magnetic fields, MISAKIAN et al. (1993) reviewed those of extremely low frequency magnetic fields, focusing on in vitro effects. BERN HARD (1992) reported on ''electromagnetic smog'' in view of pos sible effects on human health and well-being, and a series of papers edited by AMEMIYA (1994) summarizes Japanese research on effects of electromagnetic fields ranging from extern ely low to ultra-high frequencies. TENFORDE (1979) and ADEY (1981) sum marized and discussed tissue interactions, REITER (1993a) neu roendocrine and neurochemical changes associated with various kinds of electromagnetic fields. The book edited by KIRSCHVINK et al.
INGLÊS

Nervous System Regeneration In The Invertebrates

de Stacia B. Moffet

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Invertebrate animals represent a diversity of solutions to life''s challenges. Success in a wide range of environments has been achieved by an almost bewildering range of invertebrate body forms. These body forms are reflected in the wonderful diversity of their nervous systems. Despite this apparent diversity, studies of the development of invertebrates and vertebrates are yielding common themes at the molecular level. Likewise, the phenome non of neural regeneration is based upon properties intrinsic to neurons and responses to a remarkably conserved chemical lan guage. This monograph focuses on the diversity and commonal ity of responses to neural injury. The rough and tumble of life may frequently damage some part of the body, particularly the appendages or sensory sys tems. The nervous system is usually involved in repair of other body systems and often may itself require repair. Some animals are particularly successful in regenerating the nervous system or body parts. We particularly marvel at these feats of regeneration because we human beings are not particularly successful, despite our relatively long life and the advantages that would seem to accrue from such repair. It is no wonder that we would hope to learn the secrets of the more successful animals and strive to emulate them! Mechanisms of neural regeneration are often more acces sible in invertebrates than in vertebrates because questions of specificity are more easily addressed using the identifiable neu rons of the relatively simpler nervous systems of some inverte brates.
INGLÊS

Significance Of Zoochromes

de A.E. Needham

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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.
INGLÊS

Biology Of The Arthropod Cuticle

de A.C. Neville

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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; optical diffraction, high angle X-ray diffraction, low angle X -ray diffraction and selected area electron diffraction).
INGLÊS

Ethology Of Predation

de E. Curio

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Predation is an ecological factor of almost universal importance for the biol ogist who aims at an understanding of the habits and structures of animals. Despite its pervasive nature opinions differ as to what predation really is. So far it has been defined only in negative terms; it is thought not to be par asitism, the other great process by which one organism harms another, nor filter-feeding, carrion-eating, or browsing. Accordingly, one could define predation as a process by which an animal spends some effort to locate a live prey and, in addition, spends another effort to mutilate or kill it. Ac cording to this usage of the word a nudibranch, for example, that feeds on hydroids would be a predator inasmuch as it needs some time to locate col onies of its prey which, after being located, scarcely demand more than eating, which differs little from browsing. From the definition just proposed consumption of the prey following its capture has been intentionally omit ted. Indeed, an animal may be disposed of without being eaten. Hence the biological significance of predation may be more than to maintain nutrition al homeostasis. In fact, predation may have something in common with the more direct forms of competition, a facet that will be only cursorily touched upon in this book.
INGLÊS

African Ungulates - A Comparative Review Of Their Ethology And Behavioral Ecology

de Walter Leuthold

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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.
INGLÊS

Water Balance In Land Arthropods

de E. B. Edney

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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.
INGLÊS

Carabid Beetles In Their Environments - A Study On Habitat Selection By Adaptations In Physiology And Behaviour

de H.U. Thiele

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 With the increasing numbers of research workers and groups of investigators devoting themselves to the ecology of carabids I felt that the time had come to take stock of the existing knowledge in this field and to endeavour to weld my personal results and those of other workers into a comprehensive picture.
INGLÊS

Diversity And Adaptation In Fish Behaviour

de Miles H.A. Keenleyside

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The major emphasis is on field studies, since my main concern is with adaptive solutions to problems, and I believe these are most likely to be correctly perceived by workers who are familiar with the natural ecological setting of their animals.
INGLÊS

Osmoregulation In Birds

de E. Skadhauge

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 The approach of this treatise is physiological throughout. In the eyes of the author it answers the rhetorical question raised by Maurice B. Visscher at the Physiology Congress in Washington D. C. in 1968: Does physiology exist? What he meant by this question was whether the fields of cellular physiology and physiology of the various organ systems had become so large that physiology as such had vanished. The firm answer is that physiology does indeed exist. Although it is important to study physiological problems at the subcellular level, it is importan- and equally difficult - to study organ regulation at the cellular level, organ interaction, and integration into the whole organism. An account of avian osmoregulation from an integrated point of view is attempted in this book. Since reading Homer W. Smith''s From Fish to Philosopher and August Krogh''s Osmoregulation in Aquatic Animals verte brate osmoregulation has been in the center of the author''s interest. The focus was set on avian osmoregulation after personal contact with the School of Krogh when working in the laboratory of Bodil M. Schmidt-Nielsen. The fundamental concepts and isotope techniques introduced by Hans H. Ussing have been of constant inspiration. An excellent example for the study of osmoregulation at the cellular level was given by the late Jean Maetz. The writing of this book was suggested by Donald S. Farner who is thanked for thorough editorial assistance, and especially with help in the subtle semantic peculiarities of the English language.
INGLÊS

Autonomic Nerve Function In The Vertebrates

de S. Nilsson

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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.
INGLÊS

Olfactory Imprinting And Homing In Salmon - Investigations Into The Mechanism Of The Imprinting Process

de A.D. Hasler e A.T. Scholz

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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.
INGLÊS

Spermatophores - Development, Structure, Biochemical Attributes And Role In The Transfer Of Spermatozoa

de T. Mann

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 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.
INGLÊS

Adaptation To Altitude-Hypoxia In Vertebrates

de P. Bouverot

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Adaptation to altitude hypoxia is characterized by a variety offunctional changes which collectively facilitate oxygen trans port from the ambient medium to the cells of the body. All of these changes can be seen at one time or another in the course of hypoxic exposure. Yet, as already stressed (Hannon and Vogel, 1977), an examination of the literature gives only a sketchy and often conflicting picture of the exact nature of these changes and how they interact as a function of exposure duration. This is partly because of the limited number of variables explored in a given study, but it is also attributable to differences in experimental design, differences among species in susceptibility to hypoxia, nonstandardized experimental conditions, lack of proper control of physical (e. g. , temperature) and physiological variables (e. g. , body mass), failure to take measurements at key periods of exposure, and gaps in knowledge about some fundamental mechanisms. Furthermore the available data on animals native to high altitude are meager and/or inconclusive. Extensive further work under well-controlled experimental conditions is required before a detailed picture can be made. Nevertheless, it has been a guiding principle in the prepara tion of this monograph rather to summarize the vastly dis persed material that constitutes the comparative physiology of adaptation to high altitude into a coherent picture, than to provide a comprehensive survey of the field.
INGLÊS

Control Of Fish Migration

de R.J.F. Smith

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Fish migration is important and spectacular. 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.
INGLÊS

Circannual Rhythms - Endogenous Annual Clocks In The Organization Of Seasonal Processes

de Eberhard Gwinner

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 In addition to the more or less static properties of the environ ment, plants and animals must cope with its temporal variations. Among the most conspicuous temporal changes to which organisms are exposed are periodic phenomena generated by the rotation of the earth about its axis, its revolution around the sun, and the more complex movements of the moon in relation to both sun and earth. The first two of these astronomical cycles are basic to the familiar daily and annual rhythms, respectively, in the environment. The third generates somewhat more complex cycles, such as those in moonlight and variations in tides. These environmental cycles have provided challenges and opportunities for organisms to adjust their physiology and behavior to them. Indeed, the predictability inherent to these periodic processes has enabled organisms to evolve innate endogenous rhythmic programs that match the environmental cycles and allow, in a variety of different ways, adjustment of biological activities to the cycles of environmental changes. The endogenous nature of rhythmicity was first clearly recognized in the 1930''s in daily periodicities, the most widely distributed and best investigated class of biological rhythms of this type. In the 1950''s, demonstrations of endogenous tidal and lunar rhythms, which occur in some littoral and marine organisms, ensued. Another decade passed before endogenous annual periodicities were first demonstrated unambiguously.
INGLÊS

Comparative Aspects Of Extracellular Acid-Base Balance

de Jean-Paul Truchot

118,59€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 Interest in comparative acid-base physiology has considerably grown during last decades even in the absence of major technical or conceptual advances. This is firstly because it has become clear that the extracellular acid-base state reflects the performance of many exchange functions at the organism level: respiration and ventilation of the gas exchange surfaces, metab olism, iono-and osmoregulation. Such functions are much in fluenced by ambient conditions, and the measurement of acid base parameters thus provides useful information about the organism''s responses to environmental challenges. Secondly, many processes at the molecular level are now known to be pH sensitive, and acid-base regulation thus appears to be a major requirement for the functional integrity of cells and organisms. How extracellular acid-base balance can be maintained in a wide variety of animals living in different conditions is the sub ject of this book. The approach is comparative and environ mental throughout. All body fluids share similar buffer proper ties, and common physicochemical principles apply to any acid base system. However, in accord with differing designs and con straints along animal evolution, varying effector organs and mechanisms are at work to maintain an appropriate acid-base state in the organism. Particular emphasis is placed on the fun damental differences between water and air breathers and on the acid-base and respiratory problems arising at the transition from an aquatic to a terrestrial life. Also the complex array of factors influencing the acid-base state in water-dwelling animals is thoroughly discussed.
INGLÊS

Comparative Physiology Of The Pancreatic Islets

de August Epple e Jack E. Brinn

59,61€ + 10% EM CARTÃO

DISPONIBILIDADE IMEDIATA

 This approach required an arbitrary reduction of the num- ber of references, and we therefore join the chorus of recent authors who beg their colleagues for understanding if some of their publications do not appear in the bibliography.
A carregar resultados...

Ver mais resultados