This book provides a wide-ranging, state-of-the-art survey of small-angle X-ray and neutron scattering (SAS) theory (including scattering from fractal systems), instrumentation, data analysis, and new experimental techniques, and emphasizes applications in biology and materials science. These include investigations of nucleic acid-protein complexes; lipoproteins; time-resolved measurements of phospholipid phase transitions; porosity in ceramics; phase separation and defect agglomeration in metals and alloys; catalysts; complex fluids; bulk polymers; and dissolved polymers under flow conditions. The capabilities offered by SAS for exploring such properties as size, shape, structure, morphology, dispersity and interactions of scatterers, on the scale between atomic and macroscopic, are demonstrated. The volume extends and supplements basic texts. It is intended for new practitioners, scientists active in SAS who wish to learn more about applications outside their immediate expertise, and those desirous of exploring the potential applicability of SAS to their research.NATO Advanced Study Institute on Modern Aspects of is the author of 'Modern Aspects of Small-Angle Scattering' with ISBN 9780792332510 and ISBN 0792332512.