This book presents original research results on the leading edge of chemistry research. Each article has been carefully selected in an attempt to present substantial research results across a broad spectrum. Topics discussed include the chemical bonding of hydrides; transport properties and their impact on biological systems; process analysis for gas-solid fluidization; recovery of niobium as a by-product from effluent solutions; zirconia and alumina supports for nickel-based catalysts for hydrogen production and the deuterium effect on the photosensitised biomolecules damage via singlet oxygen generation.