Written by leaders in their fields, Calcium Oxalate in Biological Systems comprehensively discusses current information about the importance of this compound in animals, plants, fungi, and microorganisms. Both in vivo and in vitro methods of crystallization as well as crystallization systems are discussed. Researchers who pioneered the field contribute their invaluable knowledge for the first time about oxalate bacteria and their importance. This is an essential reference for both plant and animal scientists concerned with human and animal kidney disease.
Most kidney stones consist of crystals of calcium oxalate (CaOx) and/or calcium phosphate (CaP), and develop on nidi present on renal papillary surfaces. Stone formation is the last stage in a long process starting with development of supersaturation followed by nucleation, growth, aggregation and retention of crystals within the kidneys. A number of animal models utilizing mice, pigs, rabbits and rats, (the most common model), have been developed to understand stone pathogeneses. Animals produce crystalline deposits in the kidneys rather than typical stones attached to the papillary surface. Still, there are many common features between human and rat CaOx nephrolithiasis. Both kidney stones in humans and crystal deposits in the rats have an organic matrix comprised of lipids, carbohydrate and proteins. The crystallization in both human and rat kidneys is modulated by molecules such as osteopontin, Tamm–Horsfall Proteins, inter-alpha-inhibitor, and prothrombin fragment-1 and is associated with enzymuria of proximal tubular origin. Hyperoxaluria, hypercalciuria, hypomagnesuria and hypocitraturia are implicated in both humans and rats. CaOx stones/renal deposits are common in males of both species while females of both species produce CaP stones/renal deposits.
A critical study of the interpretation of "riba" in Islam, the attempts of Islamic banks to put the interpretation into practice, the problems associated with these attempts and an argument for rethinking the interpretation.
This important book critically examines the traditional interpretation of riba (translated as usury of interest) and the attempts of modern Islamic banks to put that interpretation into practice. The first part of the book examines the prohibition and interpretation of riba in Islam, as well as the controversies surrounding it. The second part examines the alternatives to interest-based financing utilised in Islamic banking and the problems associated with such alternatives with particular focus on mudaraba, musharaka and marabaha. The book questions the legalistic approach to the interpretation of riba and argues for a moral understanding of the issue in the light of the authoritative texts of Islam and the lessons learnt from the Islamic banking experiment.
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