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Small-angle scattering of X-rays (SAXS) and neutrons (SANS) is an established method for the structural characterization of biological objects in a broad size range from individual macromolecules (proteins, nucleic acids, lipids) to large macromolecular complexes. SAXS/SANS is complementary to the high resolution methods of X-ray crystallography and nuclear magnetic resonance, allowing for hybrid modeling and also accounting for available biophysical and biochemical data. Quantitative characterization of flexible macromolecular systems and mixtures has recently become possible. SAXS/SANS measurements can be easily performed in different conditions by adding ligands or binding partners, and b...
Although African Americans make up a small portion of the population of western North Carolina, they have contributed much to the area's physical and cultural landscape. This enlightening study surveys the region's segregated black schools from Reconstruction through integration and reveals the struggles, achievements, and ultimate victory of a unified community intent on achieving an adequate education for its children. The book documents the events that initially brought blacks into Appalachia, early efforts to educate black children, the movement to acquire and improve schools, and the long process of desegregation. Personnel issues, curriculum, extracurricular activities, sports, consolidation, and construction also receive attention. Featuring commentary from former students, teachers and parents, this work weighs the value and achievement of rural segregated black schools as well as their significance for educators today.
Includes field staffs of Foreign Service, U. S. missions to international organizations, Agency for International Development, ACTION, U.S. Information Agency, Peace Corps, Foreign Agricultural Service, and Department of Army, Navy and Air Force.
This book describes all aspects of the technique of small-angle scattering of X-rays and neutrons, including instrumentation, sample requirements, data interpretation and modelling methods, in a comprehensive way and gives examples of applications in various fields of biophysics and biochemistry.
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Soft condensed matter physics, which emerged as a distinct branch of physics in the 1990s, studies complex fluids: liquids in which structures with length scale between the molecular and the macroscopic exist. Polymers, liquid crystals, surfactant solutions, and colloids fall into this category. Physicists deal with properties of soft matter system