Calcium-based catalysts are of high interest for glycerol polymerization due to their catalytic activity and large availability. However, poor stability under reaction conditions is an issue. In the present study, we investigated Ca-hydroxyapatites (HAps) as one most abundant Ca-source in nature. A stochiometric, Ca-deficient Ca-rich HAps were synthesized tested reaction. Deficient stochiometri...

Fish bone by-products are considered as abundant source of hydroxyapatite (HAp). The preparation HAp from fish bones not only contributes to improving the value but also minimizes negative impacts on environment. In this study, nanohydroxyapatite was successfully obtained Lates calcarifer purchased seafood export company in Khanh Hoa province. were under alkali treatment and then heated at 600o...

Hydroxyapatite (HA) is a calcium phosphate bioceramic widely used for bone grafting and augmentation purposes. The biological response of HA can be improved through chemical and microstructural modifications, as well as by manufacturing it as macroporous implants. In the present study, calcium deficient hydroxyapatite (CDHA) and Si substituted hydroxyapatite (SiHA) macroporous scaffolds have be...

Inorganic non-metallic biomaterials, including the silicon frustule of a unicellular diatom, the carbonate shell of a mollusk and the calcium skeleton of the vertebrate, which are the main constituent part of an organism, serve as the supportive and protective components of soft tissue. Among them, hydroxyapatite, which primarily makes up the enamel and bone, is widely used in tissue engineerin...

BACKGROUND Recently, incorporation of nanohydroxyapatite (NHA) has been suggested to improve the mechanical properties of glass ionomers (GIs). This study aimed to assess the effect of addition of NHA on wear of resin modified glass ionomer (RMGI) by tooth brushing simulation. MATERIAL AND METHODS In this in vitro, experimental study, NHA in 1, 2, 5, 7 and 10wt% concentrations was added to Fu...

A new diagnostic concept based on deep Raman spectroscopy is proposed permitting the non-invasive determination of the level of carbonate substitution in type II calcifications (HAP). The carbonate substitution has shown to be directly associated with the pathology of the surrounding breast tissue and different pathology groups can therefore be separated using specific features in the Raman spe...