The prevalence of lipids devoid of phosphorus suggests that the availability of phosphorus limits microbial growth and activity in many anoxic, stratified environments. To better understand the response of anaerobic bacteria to phosphate limitation and starvation, this study combines microscopic and lipid analyses with the measurements of fitness of pooled barcoded transposon mutants of the mod...

Bone powder from patients dying with chronic renal failure of more than 1 yr duration was shown to release less calcium and more phosphate when equilibrated with a buffer solution. pH 7.4 at 4 degrees C. This change persisted after removal of the organic component and was associated with a reduction in the bone carbonate content. Crystal size and surface area showed no consistent changes from t...

During the last few years we have been engaged in a study of the inorganic composition of bone. Early in our work we ran into difficulties with methods. The literature contains the description of a variety of procedures for the quantitative determination of calcium, magnesium, carbonate, and phosphate in bone. In our hands, however, these have either not given reproducible results or have been ...

In March 2006, a dead, male bottlenose dolphin (Tursiops truncatus) was found in the salt marsh in Charleston, South Carolina, United States. During necropsy, an enterolith was found completely obstructing the intestinal lumen. Further examination of the enterolith revealed a stingray spine nidus. Most terrestrial enteroliths are composed primarily of struvite (magnesium ammonium phosphate); ho...

During the last few years we have been engaged in a study of the inorganic composition of bone. Early in our work we ran into difficulties with methods. The literature contains the description of a variety of procedures for the quantitative determination of calcium, magnesium, carbonate, and phosphate in bone. In our hands, however, these have either not given reproducible results or have been ...

The rapid destruction of chemical threats, such as phosphate-based nerve agents, is of considerable current interest. The hydrolysis of the nerve-agent simulant methylparaoxon, as catalyzed by UiO-66 and UiO-67, was examined as a function of pH. Surprisingly, even though typical phosphate−ester hydrolysis mechanisms entail nucleophilic attack of the simulant by aqueous hydroxide, the rate of hy...

INTRODUCTION: Synthetic calcium phosphate cements (CPC) which mimic the chemical structure of the mineral composition of bone have been well accepted as bone grafting materials due to their consistent osteoconductivity, ease of use, and mechanical properties but are limited in application due to their lack of osteoinductive potential. Demineralized Bone Matrix (DBM) has also found significant a...