The decline of dental caries in the industrialized countries can be attributed to widespread use of fluorides. The Japanese market share of dentifrices containing fluorides has increased from 12% in 1985 to 77% in 2000. For a fluoride dentifrice to be effective in the control of dental caries, an adequate concentration of the fluoride must be soluble. Several Japanese fluoride dentifrices have ...

1. The translocation of 45Ca2+ in vesicles reconstituted with purified Ca2+ ATPase of sarcoplasmic reticulum and phospholipids was dependent on ATP and varied greatly with the composition of the phospholipids. 2. In contrast to sarcoplasmic reticulum fragments, the reconstituted vesicles were impermeable to 14C-labeled oxalate, 3H- or 32P-labeled ATP, or 32P-i. There was no translocation of pho...

In view of the current situation wherein acid resources and valuable components in titanium dioxide waste cannot be effectively extracted are prone to secondary pollution, our research team proposed a new technique consisting step extraction comprehensive utilization acid. this paper, thermodynamics selective precipitation preparation doped iron phosphate from were studied. The results show tha...

This study deals with the effect of gelatin on physical and mechanical properties of  calcium phosphate bone cements. The mixture of tetracalcium phosphate (TTCP) and dicalcium phosphate (DCPA) as the cement powder was mixed with 6 wt% Na2HPO4 solution containing different amount (0, 2, 5 and 8% in w/w) of foamed gelatin as liquid phase. The physical properties were determined in the terms of s...

The ability of bile salts to inhibit the precipitation of either calcium hydroxyapatite or its precursor, amorphous calcium phosphate, by reducing Ca2+ activity or poisoning nascent crystals was determined. When apatite precipitated rapidly (1-4 h), glycocholate and taurine-conjugated bile salts (up to 100 mM) had little effect on apatite formation, but prevented amorphous calcium phosphate pre...

Alkaline phosphatase from bovine synovial fluid was purified 2300-fold. A molecular weight of 72,300 was determined from sucrose density gradient studies. The following monoesters were hydrolyzed by the enzyme: P-glycerophosphate, galactosamine 6-phosphate, glucosamice 6-phosphate, glucose 6-phosphate, o-phospho-L-serine, o-carboxyphenyl phosphate, phenyl phosphate, and p-nitrophenyl phosphate....

Sarcoplasmic reticulum (SR) Ca2+-ATPase gene expression is reduced in the failing myocardium. However, the functional relevance of these changes to myocardial contractility is not yet established. We assessed myocardial contractile function by analyzing sarcomere motion of isolated myocytes and also quantified SR Ca2+ regulatory protein gene expression by Northern blot analysis in the same hear...

Previous studies reported premixed calcium phosphate cements (CPCs) that were stable in the package and form hydroxyapatite (HA) as the product after exposure to an aqueous environment. These cements had setting times of greater than 60 min, which are too long to be useful for some clinical applications. The present study investigated properties of fast-setting HA-forming premixed CPCs that ini...