Download or read book Practical Thin Layer Chromatography written by Bernard Fried and published by CRC Press. This book was released on 2017-11-22 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical Thin-Layer Chromatography provides thorough coverage of the principles, practices, and applications of thin-layer chromatography (TLC) for important sample and compound types. This information is directed specifically at workers in the most active scientific fields.
Download or read book The Ecology and Behavior of Amphibians written by Kentwood D. Wells and published by University of Chicago Press. This book was released on 2010-02-15 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consisting of more than six thousand species, amphibians are more diverse than mammals and are found on every continent save Antarctica. Despite the abundance and diversity of these animals, many aspects of the biology of amphibians remain unstudied or misunderstood. The Ecology and Behavior of Amphibians aims to fill this gap in the literature on this remarkable taxon. It is a celebration of the diversity of amphibian life and the ecological and behavioral adaptations that have made it a successful component of terrestrial and aquatic ecosystems. Synthesizing seventy years of research on amphibian biology, Kentwood D. Wells addresses all major areas of inquiry, including phylogeny, classification, and morphology; aspects of physiological ecology such as water and temperature relations, respiration, metabolism, and energetics; movements and orientation; communication and social behavior; reproduction and parental care; ecology and behavior of amphibian larvae and ecological aspects of metamorphosis; ecological impact of predation on amphibian populations and antipredator defenses; and aspects of amphibian community ecology. With an eye towards modern concerns, The Ecology and Behavior of Amphibians concludes with a chapter devoted to amphibian conservation. An unprecedented scholarly contribution to amphibian biology, this book is eagerly anticipated among specialists.
Download or read book Biology of Amphibians written by William E. Duellman and published by JHU Press. This book was released on 1994-02 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now reissued in paperback with an updated preface by the authors, Biology of Amphibians remains the standard work in its field.
Download or read book Ion Channels written by T. Narahashi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wealth of information has been accumulated about the function of ion channels of excitable cells since the extensive and pioneering voltage clamp studies by Hodgkin, Huxley, and Katz 36 years ago. The study of ion chan nels has now reached a stage at which a quantum jump in progress is antici pated. There are many good reasons for this. Patch clamp techniques origi nally developed by Neher and Sakmann 12 years ago have made it possible to study the function of ion channels in a variety of cells. Membrane ionic currents can now be recorded practically from many types of cells using the whole-cell patch clamp technique. The opening and closing of individual ion channels can be analyzed using the single-channel patch clamp method. Techniques have also been developed to incorporate purified ion channels into lipid bilayers to reconstitute an "excitable membrane. " Advanced tech niques developed in molecular biology, genetics, and immunology, such as gene cloning and the use of monoclonal antibodies, are now being applied to the study of ion channels. A variety of drugs have now been found or are suspected to interact with ion channels to exert therapeutic effects. In addition to the classical exam ples, as represented by local anesthetics, many other drugs, including cal cium antagonists, psychoactive drugs, cardiac drugs, and anticonvulsants, shown to alter ion channel function. For certain pesticides such as have been pyrethroids and DDT, sodium channels are clearly the major target site.
Download or read book A Natural History of Amphibians written by Robert C. Stebbins and published by Princeton University Press. This book was released on 2021-08-10 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a book for all readers who want to learn about amphibians, the animal group that includes frogs, toads, salamanders, and caecilians. It draws on many years of classroom teaching, laboratory experience, and field observation by the authors. Robert Stebbins and Nathan Cohen lead readers on a fascinating odyssey as they explore some of nature's most interesting creatures, interspersing their own observations throughout the book. A Natural History of Amphibians can serve as a textbook for students and independent learners, as an overview of the field for professional scientists and land managers, and as an engaging introduction for general readers. The class Amphibia contains more than 4,500 known living species. New species are being discovered so rapidly that the number may grow to more than 5,000 during our lifetimes. However, their numbers are being rapidly decimated around the globe, largely due to the encroachment of humans on amphibian habitats and from growing human-caused environmental pollution, discussed at length in the final chapter. The authors focus our attention on the "natural history" of amphibians worldwide and emphasize their interactions with their environments over time: where they live; how they reproduce; how they have been affected by evolutionary processes; what factors will determine their destinies over time. Through the experienced eyes of the authors, who are skilled observers, we come to see and understand the place of amphibians in the natural world around us.
Download or read book Environmental Physiology of the Amphibians written by Martin E. Feder and published by University of Chicago Press. This book was released on 1992-10-15 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through its emphasis on recent research, its many summary tables, and its bibliography of more than 4,000 entries, this first modern, synthetic treatment of comparative amphibian environmental physiology emerges as the definitive reference for the field. Forty internationally respected experts review the primary data, examine current research trends, and identify productive avenues for future research.
Download or read book Nonmammalian Animal Models for Biomedical Research written by Avril D. Woodhead and published by CRC Press. This book was released on 1989-11-30 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides essential knowledge and informa-tion required to adequately assess useful alternatives from among the lower vertebrates and the invertebrates. This volume highlights unfamiliar and underde-veloped organisms that have the potential to become very satisfactory surrogates for biomedical research. A practical guide aimed at disseminating information to researchers about new models, this work provides compara-tive biomedical studies at many levels of the phyloge-netic ladder.
Download or read book Occasional Papers of the Museum of Natural History the University of Kansas written by and published by . This book was released on 1980 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Experimental Biology written by and published by . This book was released on 1994 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Patterns of Distribution of Amphibians written by William Edward Duellman and published by JHU Press. This book was released on 1999-07-28 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sweet, University of California, Santa Barbara; Michael J. Tyler, University of Adelaide, Australia; Zhao Er-Mi, Chengdu Institute of Biology, Peoples Republic of China
Download or read book Fortschritte der Chemie organischer Naturstoffe Progress in the Chemistry of Organic Natural Products written by and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of condensed tannins has hitherto represented a relatively unattractive and therefore neglected area of study; one in which the weight of research effort involved is invariably disproportionate to the results achieved, in which the participating schools generally confine their approach to specific molecular species, and in which as yet no consensus has been reached regarding likely precursors. The problems which beset those engaged in this field represent a combined function of the abnormal complexity of the gradational range of oligomers of increasing mass and affinity for substrates which typify most extracts rich in tannins, and the consequent problem of their isolation and purification, the high chirality of tannin oligomers, the need to contend with the phenomenon of dynamic 'rotational isomerism about interflavanoid bonds in the IH n.m.r. spectral interpretation of their derivatives, the lack of precise knowledge regarding the points of bonding at nucleophilic centres, and the obvious limitations of a hitherto predominantly analytical approach. The last of these reflects the need for a general method of synthesis which permits unambiguous proof of both structure and absolute configuration also at higher oligomeric levels. With these objectives in mind we initiated a purely synthetic approach based on the premise that flavan-3,4-diols as source of electrophilic flavanyl-4-carbocations, and flavan-3-0Is as nucleophiles (cf 1,2) represent the prime initiators of a process of repetitive condensation in which the immediate products also represent the sequent nucleophilic substrates.
Download or read book Field Guide to the Frogs and Toads of Costa Rica written by John O. Cossel Jr. and published by BookBaby. This book was released on 2017-09-25 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Eponym Dictionary of Amphibians written by Bo Beolens and published by Pelagic Publishing. This book was released on 2013-04-22 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: New species of animal and plant are being discovered all the time. When this happens, the new species has to be given a scientific, Latin name in addition to any common, vernacular name. In either case the species may be named after a person, often the discoverer but sometimes an individual they wished to honour or perhaps were staying with at the time the discovery was made. Species names related to a person are ‘eponyms’. Many scientific names are allusive, esoteric and even humorous, so an eponym dictionary is a valuable resource for anyone, amateur or professional, who wants to decipher the meaning and glimpse the history of a species name. Sometimes a name refers not to a person but to a fictional character or mythological figure. The Forest Stubfoot Toad Atelopus farci is named after the FARC, a Colombian guerrilla army who found refuge in the toad’s habitat and thereby, it is claimed, protected it. Hoipollo's Bubble-nest Frog Pseudophilautus hoipolloi was named after the Greek for ‘the many’, but someone assumed the reference was to a Dr Hoipollo. Meanwhile, the man who has everything will never refuse an eponym: Sting's Treefrog Dendropsophus stingi is named after the rock musician, in honour of his ‘commitment and efforts to save the rainforest’. Following the success of their Eponym Dictionary of Reptiles, the authors have joined forces to give amphibians a similar treatment. They have tracked down 1,609 honoured individuals and composed for each a brief, pithy biography. In some cases these are a reminder of the courage of scientists whose dedicated research in remote locations exposed them to disease and even violent death. The eponym ensures that their memory will survive, aided by reference works such as this highly readable dictionary. Altogether 2,668 amphibians are listed.
Download or read book Biologics A History of Agents Made From Living Organisms in the Twentieth Century written by Alexander von Schwerin and published by Routledge. This book was released on 2015-10-06 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of biologics – drugs made from living organisms – has raised specific scientific, industrial, medical and legal issues. The essays contained in this collection each deal with a case study of a biologic substance, or group of biologics, and its use during the twentieth century.
Download or read book Proceedings of the Biological Society of Washington written by Biological Society of Washington and published by . This book was released on 1981 with total page 1320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 1 issued also in Smithsonian Institution, miscellaneous collections, v. 25; Vol. 2 issued also as Smithsonian Institution, miscellaneous publication, no. 545.
Download or read book Shark Repellents From The Sea written by Bernard J Zahuranec and published by CRC Press. This book was released on 2019-09-16 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some species of sharks, because they are large, agile predators, are extremely dangerous to humans in water. During World War II, the long-time goal of an effective shark repellent was partially realized by the U.S. Navy's development of "Shark Chaser," a copper acetate-negrosine dye mixture. But neither Shark Chaser nor other noxious or even extre
Download or read book Occasional Papers of the Natural History Museum written by and published by . This book was released on 1976 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
