Titlebook: Hydrology and Water Resources of Africa; Mamdouh Shahin Book 2002 Springer Science+Business Media Dordrecht 2002 Erosion.Groundwater.Physi

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abolic and infectious pathological conditions, and in the growth, development, and integrity of mammalian cells has achieved widespread recognition. Intensive inquiry into the biological roles of sialic acid continues in a large number of research laboratories throughout the world. This book is inte

cartilage

concentration (500 μM). Thus a soluble TαGTP cannot drift very far while shuttling between rhodopsin and PDE molecules present on the two membrane surfaces that limit the cytoplasmic layer. Other G-proteins, in more usual cellular environments, would dilute in the cytoplasm if they were released fro

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ing of the individual components involved during the fibrillation, notably without physical separation of the species. In this chapter we explain how to optimize a small angle scattering analysis of the fibrillation process and the basic principles behind analysis of the data. We include several pra

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nd hybrid modelling approaches, solution scattering is synergistically used with other structural techniques utilizing the complementary information such as atomic models of the components, intramolecular contacts, subunits orientations etc. for the reconstruction of complex systems. The usual requi

BACLE

uch as propagule banks and the presence of other biocrust organisms. Primary colonists such as cyanobacteria and fungi typically facilitate establishment, and bryophytes often occur in the later stages of crust development. Ecologically, biocrust bryophytes provide habitats for other crust community

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significant soil properties influencing the cover, richness, and composition of biocrusts in dryland environments are soil texture, pH, and calcareousness. Additionally, gypsiferous soils are often associated with distinct floras and high abundance and diversity of biocrusts, especially lichens. At