Rates of hydrocarbon biodegradation were estimated by following oxygen uptake during mineral oil oxidation or oxidation of [1-14C]hexadecane to 14CO2, when these substrates were added to natural water samples from Wisconsin lakes. A lag phase preceded hydrocarbon oxidation, the length of which depended on population density or on factors influencing growth rate and on the presence of nonhydroca...

BACKGROUND Chronic kidney disease (CKD) is associated with mineral metabolism dysregulation, cardiovascular disease, and premature mortality. No study specifically examined mineral metabolism trends in a generalizable sample of patients at increased CKD risk. METHODS This cross-sectional analysis from November 1, 2005, to December 31, 2006, of calcium, phosphorus, and parathyroid hormone (PTH...

Many studies have been made on the need of calcium, phosphorus, and vitamin D in the nutrition of the pig. The majority of these investigations dealt with the effect of mineral and vitamin deficient rations and how the deficiencies could be corrected. No specific information, so far as the writers are aware, is available regarding the effect of the calcium-phosphorus ratio of the ration on its ...

We report the case of a 30-year-old African-American male with osteopetrosis and hypophosphatemia, presenting with diffuse myalgias. Laboratory evaluation performed revealed a low serum phosphorus level with urinary phosphate wasting, low calcium, and 25-hydroxyvitamin D concentrations, as well as elevated alkaline phosphatase. Skull and pelvic radiographs revealed high bone density consistent ...

Hyperphosphataemia occurs in nearly all patients with end-stage renal disease (ESRD). In the past, the need to manage hyperphosphataemia focused primarily on its role as a contributor to secondary hyperparathyroidism and renal osteodystrophy. There is now widespread recognition that disturbances in phosphorus metabolism and/or the therapeutic measures used to manage it are important risk factor...

Twenty-nine additives were evaluated for their antiwear and extreme pressure properties when incorporated in various percentages in lithium soap-mineral oil greases. The percentages of the principal antiwear and extreme pressure inducing elements: sulfur, chlorine, phosphorus and lead were determined. The most promising ones were further evaluated in commercialgreases and in inorganic thickened...

INTRODUCTION Reproductive efficiency is a major factor that affects profitability in ruminants. The reproductive process consists of the male producing viable sperm, the female exhibiting estrus and conceiving, and proper embryonic and fetal development that results in the birth of a live offspring. A number of trace minerals are important in maximizing reproductive performance. Even marginal t...

I. Four groups of weanling rats were maintained on diets containing either 0 1 2 % or 0.24 yo of both calcium and phosphorus, in the presence and absence of added ergocalciferol. 2. Increase in mineral intake or the provision of vitamin D increased the final body-weight, with a significant interaction between the two factors. 3. Serum Ca and P concentrations were raised significantly by both th...

The pathogenesis and management of chronic kidney disease-mineral bone disorders (CKD-MBD) has experienced major changes, but the control of serum phosphorus at all stages of CKD still seems to be a key factor to improve clinical outcomes. High serum phosphorus is the most important uremia-related, non-traditional risk factor associated with vascular calcification in CKD patients and in the gen...

End-stage renal disease (ESRD) patients have a dramatically higher risk of death compared with the general population [1]. In 1998, Block et al. showed that hyperphosphataemia and a high calcium phosphorus product are independently associated with mortality in dialysis patients [2]. More recently, based on a large cohort, the same authors have confirmed these findings adding hypercalcaemia and ...