title: Thermally stimulated polarization studies of kidney stones. II. Effect of annealing and thickness.
abstract: To investigate the cause of the d.c. charged conductivity state of kidney stones, the effect of annealing and sample thickness on thermally stimulated polarization was studied. It was observed that the peak current decreased and the peak temperature rose with increasing annealing temperature and the sample thickness. The sharpness of the single peak decreased and the activation energy increased with both parameters. The results have been explained on the basis of the loss of water attached to calcium oxalate and calcium phosphate, denaturation of collagen and the ionic nature of the main constituents of the kidney stone.
authors.affiliation: Department of Physics, Regional Engineering College, Kurukshetra, India.
authors.forename: I M
authors.initials: IM
authors.lastname: Talwar
authors.forename: Y
authors.initials: Y
authors.lastname: Yagyik
authors.forename: N
authors.initials: N
authors.lastname: Lal
mesh_terms: D002118:Calcium / Q000737:chemistry; D002129:Calcium Oxalate / Q000737:chemistry; D002130:Calcium Phosphates / Q000737:chemistry; D004553:Electric Conductivity; D006358:Hot Temperature; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry*
chemical_list: D002130:Calcium Phosphates; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; D002129:Calcium Oxalate; C485838:calcium phosphate, monobasic, anhydrous; C020243:calcium phosphate; C485829:calcium phosphate, dibasic, anhydrous; D002118:Calcium