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The Code of Federal Regulations of the United States of America
The Code of Federal Regulations is the codification of the general and permanent rules published in the Federal Register by the executive departments and agencies of the Federal Government.
Federal Register
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Porous Polymer Science and Applications
Porous Polymer Science and Applications aims to provide recent developments and advances in synthesis, tuning parameters, and applications of porous polymers. This book brings together reviews written by highly accomplished panels of experts working in the area of porous polymers. It encompasses basic studies and addresses topics of novel issues concerning the applications of porous polymers. Chapter topics span basic studies, novel issues, and applications addressing all aspects in a one-stop reference on porous polymers. Applications discussed include catalysis, gas storage, energy and environmental sectors making this an invaluable guide for students, professors, scientists and R&D indust...
Marking the Land
Marking the Land investigates how hunter-gatherers use physical landscape markers and environmental management to impose meaning on the spaces they occupy. The land is full of meaning for hunter-gatherers. Much of that meaning is inherent in natural phenomena, but some of it comes from modifications to the landscape that hunter-gatherers themselves make. Such alterations may be intentional or unintentional, temporary or permanent, and they can carry multiple layers of meaning, ranging from practical signs that provide guidance and information through to less direct indications of identity or abstract, highly symbolic signs of sacred or ceremonial significance. This volume investigates the conditions which determine the investment of time and effort in physical landscape marking by hunter-gatherers, and the factors which determine the extent to which these modifications are symbolically charged. Considering hunter-gatherer groups of varying sociocultural complexity and scale, Marking the Land provides a systematic consideration of this neglected aspect of hunter-gatherer adaptation and the varied environments within which they live.
Recent Advances in Organocatalysis
Organocatalysis has recently attracted enormous attention as green and sustainable catalysis. It was realized as a fundamental field providing wide families of catalysts for important organic transformations. It will certainly develop in the future. Given the diversity of accessible transformations, metal-catalyzed reactions have become major tools in organic synthesis that will undoubtedly continue to have an important impact in the future. Alternatively, over the last years, a metal-free approach such as organocatalysis has reached a level of faithfulness, allowing researchers to discover new catalytic systems based on engagement of new or early-prepared organic molecules as organocatalysts. Organocatalysis meets green chemistry principles, especially the reduction of toxicity and chemical accidents, the biodegradability, and the use of benign and friendlier reaction media and conditions.
