Gerald Pollack - Böcker
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5 produkter
361 kr
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344 kr
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This book describes how cells work. It challenges the current wisdom of cell function, and presents a new, simpler approach to fundamental processes such as movement, transport, division, and communication, based on sound physical principles. The book is profusely illustrated with many color figures. It is written for the non-expert in an accessible, often humorous style.
390 kr
Skickas inom 3-6 vardagar
Professor Pollack takes us on a fantastic voyage through water, showing us a hidden universe teeming with physical activity that provides answers so simple that any curious person can understand. In conversational prose, Pollack lays a simple foundation for understanding how changes in water's structure underlie most energetic transitions of form and motion on earth.
507 kr
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1 638 kr
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Prior to the emergence of the sliding filament model, contraction theories had been in abundance. In the absence of the kinds of structural and biochemical information available today, it has been a simple matter to speculate about the possible ways in which tension generation and shortening might occur. The advent of the sliding filament model had an immediate impact on these theories; within several years they fell by the wayside, and attention was redirected towards mechanisms by which the filaments might be driven to slide by one another. In terms of identifying the driving mechanism, the pivotal observa tion was the electron micrographic indentification of cross-bridges extending from the thick filaments. It was quite naturally assumed that such bridges, which had the ability to split ATP, were the molecular motors, i.e., that they were the sites of mechanochemical transduction. Out of this presumption grew the cross-bridge model. in which filament sliding is presumed to be driven by the cyclic interaction of cross-bridges with complementary actin sites located along the thin filaments.