Flame photometry has many applications, and in the clinical field its use in the estimation of serum sodium and potassium is now well established. Difficulties have been encountered in the estimation of serum calcium by flame photometry, since the emission spectrum of calcium is relatively weak and is subject to interference by the presence of other ions, e.g., sodium. Although many methods hav...

Studies of recurrent stone formers indicated that they have significantly increased urinary oxalate and decreased ascorbate excretions. Results of oral and intravenous administration of ascorbate indicate an enhanced production of oxalate from ascorbate in recurrent calcium stone formers as compared with normal persons and that most of this oxalate is generated in the gut.

Background & Aim: Punica granatum L. (pomegranate) is a widely used plant that has high nutritional value .This study evaluated prevention effect of hydro alcoholic extract of Punica granatum flower and leaves ethylene glycol-induced Nephrolithiasis in Wistar rats. Experimental: 20 male Wistar rats were randomly divided into 4 equal groups. G...

INTRODUCTION Nephrolithiasis is a common condition with high prevalence and recurrence, occurring by a complex and multifactorial process. OBJECTIVE To analyze the main dietary and metabolic characteristics of patients with nephrolithiasis and compare them with a control group. METHODS A cross sectional study with 31 patients with nephrolithiasis (NE) and 18 healthy. By the dietary intake i...

Randall's plaque is microscopically a plaque of calcium deposited in the interstitial tissue of the renal papilla. These plaques are thought to serve as a nidus for urinary stone formation. Large amounts of Randall's plaque are unique to idiopathic calcium oxalate stone formers. Although Randall's plaques can be found in other stone formers, only in idiopathic calcium oxalate stone formers, the...

Thermal transformations of natural calcium oxalate monohydrate known in mineralogy as whewellite have been undertaken using a combination of thermal analysis and Raman microscopy with the use of a thermal stage. High resolution thermogravimetry shows that three mass loss steps occur at 162, 479 and 684 °C. Evolved gas mass spectrometry shows that water is evolved in the first step and carbon di...

Fragmented sarcoplasmic reticulum (FSR) from rabbit muscle was examined by positive staining, negative staining, and freeze-etch electron microscopic techniques in the absence and presence of calcium transport conditions. The existence of 30-40 A particles covering the outer surface of FSR vesicles was confirmed by two different negative stains in unfixed, glutaraldehyde-fixed and osmium tetrox...

Evidence is presented that the colorimetric chloranilate calcium method can be accurately applied to urine provided that elimination of interfering substances, which include magnesium, is performed prior to the determination. Isolation of calcium as the oxalate, followed by perchioric acid digestion, has been shown to be an acceptable method whereby urinary calcium can be put in a suitable stat...

OBJECTIVE To investigate the role of density value in computed tomography (CT) and twinkling artifact observed in color Doppler analysis for the prediction of the mineral composition of urinary stones. MATERIAL AND METHODS A total of 42 patients who were operated via percutaneous or endoscopic means and had undergone abdominal non-contrast CT and color Doppler ultrasonography examinations wer...

Urine contains variable amounts of organic matter derived from cell degradation. The cellular detritus is composed by membranous and cytosolic glycoproteins, etc. The aim of this paper was to study the role of organic matter in calcium oxalate crystal development and to evaluate the action of some crystallization inhibitors on this process. Crystallization studies were carried out on urine in s...