Sediments from the Southern Caspian Sea, located in Iranian coast were examined on the basis of P-fractionation (five forms of phosphorus) by a sequential extraction scheme. Ninety-six surface sediment samples (for each season with triplicate) were collected from eight sampling transects in 10 and 100 m depths during summer and winter in 2010-2011. The result indicated that the most abundant fo...

Marriott and Howland (1), in 1916, showed that in the blood of uremic patients the serum calcium is low but that there is an increased concentration of inorganic phosphorus. That there might be some relation between the rise of phosphate and the fall of calcium was first suggested by Binger (2), who injected solutions of 0-phosphates intravenously into dogs and observed an elevation of inorgani...

As early as 1911 Greenwald (1) showed that one of the first detectable results of the removal of the parathyroid glands was a decreased excretion of phosphorus in the urine. In 1913 he (2) extended these studies to show that the effect was on phosphorus directly and not on sodium or potassium. Some years later Greenwald (3) again drew attention to these findings. However, little emphasis was gi...

BACKGROUND Secondary hyperparathyroidism characterized by hyperplasia of the parathyroid gland (PTG) is a consequence of chronic renal insufficiency (CRI). Dietary phosphate restriction and sevelamer hydrochloride, a calcium-free phosphate binder, suppress parathyroid hormone (PTH) secretion and PTG hyperplasia in experimental animals with CRI, independently of serum calcium and 1,25(OH)(2)D(3)...

The Neurology and Medical Departments of the Detroit Receiving Hospital have recently made clinical and electroencephalographic (E.E.G.) studies of two patients in a family in which several members appear to have either pseudohypoparathyroidism or pseudo-pseudohypoparathyroidism. The findings were of sufficient interest to prompt us to review this subject and to present our findings since the n...

CONTEXT Hyperphosphatemia has an important role in the development of bone and mineral abnormalities in end-stage renal disease (ESRD). OBJECTIVE To compare the phosphorus binding power and the hypercalcemic effect of calcium acetate and calcium carbonate in hemodialysis patients. TYPE OF STUDY Crossover, randomized, double-blind study. PLACE A private hospital dialysis center. PARTICIP...

Vascular calcification is a mortality risk factor for stage 5 chronic kidney disease patients. We investigated the role of phosphorus and vitamin D analogs in the pathogenesis of vascular calcification using in vivo, ex vivo, and in vitro models. Our results demonstrate that uremic rats receiving a hyperphosphatemia-inducing diet did not exhibit aortic calcification despite elevated levels of s...

PURPOSE To compare the levels of calcium and phosphorus in the aqueous humor and serum of diabetics and non-diabetics. METHODS We divided patients into two groups: seventy-six non-diabetic cataract patients and fifty-two diabetic cataract patients. The diabetic group was divided again into three subgroups: twenty-six patients with no diabetic retinopathy, thirteen patients with non-proliferat...

BACKGROUND AND PURPOSE The purpose of this study was to assess the association of vitamin D deficiency and indices of mineral metabolism with subclinical carotid markers that predict cardiovascular events. METHODS Two hundred three community-dwelling adults (Northern Manhattan Study; age, 68 ± 11; age range, 50 to 93 years) had serum measurements (calcium, phosphorus, 25-hydroxyvitamin D, 1,2...

composition and size and weight of organs in growing chickens. Asian-Australasian Journal of Animal Sciences 12: 49-55. SHAFEY, T.M., MCDONALD, M.W. and DINGLE, J.G. (1991) Effects of dietary calcium and available phosphorus concentration on digesta pH and on the availability of calcium, iron, magnesium and zinc from the intestinal contents of meat chickens. British Poultry Science 32: 185-94. ...