منابع مشابه
Savage Nature and Ecologic Exchange
“T are neither carnivores nor reptiles in Tahiti,” wrote Paul Gauguin in his journal Noa Noa. “The only ‘wild game’ on the island are the pigs which have escaped into the forest, where they have multiplied and become entirely wild.” The artist’s first impression after the long voyage, “sixty-three days of feverish expectancy,” was “nothing very extraordinary; nothing, for instance, that could b...
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1. I ntroduction 2. P artitioning of O2 and CO2 Exchange Across the Respiratory Surfaces 2.1. P rimitive Ray‐Finned Fishes (Actinopterygii) 2.2. L obe‐Finned Fishes (Sarcopterygii) 2.3. J awless Fishes (Agnatha) 3. B lood O2 Transport 3.1. G eneral Principles of Hb Function 3.2. F actors AVecting the ArterioVenous O2 DiVerence 3.3. S urvey of Extant Primitive Fishes 4. T ransport and Eliminatio...
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Vapor transfer is an important phenomenon in various thermally driven membrane processes such as membrane distillation (MD), membrane evaporation and membrane condensation. In this study, we explore the mass transfer phenomena in sweeping gas membrane distillation (SGMD) by systematically investigating the effects of operational parameters on the process performance. It is found that mass trans...
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Insect respiratory physiology has been studied for many years, and interest in this area of insect biology has become revitalized recently for a number of reasons. Technical advances have greatly improved the precision, accuracy and ease with which gas exchange can be measured in insects. This has made it possible to go beyond classic models such as lepidopteran pupae and examine a far greater ...
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Evaporative solvent exchange, a critical process in multi-step batch synthesis of positron emission tomography (PET) tracers, can readily be accomplished in poly(dimethylsiloxane) (PDMS) chips due to its high vapor permeability. Early proof-of-concept chips, however, suffered reliability issues, such as clogged channels and stuck valves. We demonstrated in previous work that by controlling the ...
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ژورنال
عنوان ژورنال: Nature
سال: 1974
ISSN: 0028-0836,1476-4687
DOI: 10.1038/250289a0