Synthesis and Characterization of Hydroxyapatite and Hydroxyapatite‐Based Catalysts

Injectable Hydrated Calcium Phosphate Bone-like Paste: Synthesis, In Vitro, and In Vivo Biocompatibility Assessment

“…The peak at 1649 cm −1 indicates the presence of adsorbed water. These data are in good agreement with previous studies [45,46]. After sintering, a sharp peak of the OH-group appears at 3566 cm −1 , indicating an increase in the crystallinity of the samples and the presence of the HA phase.…”

Facile synthesis of hydroxyapatite nanoparticles from eggshell biowaste using Azadirachta indica extract as a green template

“…Although numerous methods have been used for the synthesis of HANPs, including wet precipitation, [18][19][20] hydrothermal, 21,22 sonochemical synthesis [23][24][25] sol-gel, [26][27][28] micro-emulsion, [29][30][31] protein-templated, 32 membrane-templated 33 and microwaveassisted. 6,[34][35][36] Most of these methods require high temperatures and/or longer times to produce uniform-sized, pure HANPs.…”

HA/PLA Composite Nanoparticles for Enhanced Oral Bioavailability of Capsaicin: Fabrication, Characterization and in vitro‐in vivo Evaluation

“…The operating steps were as follows: Initially, Ca(NO 3 ) 2 ⋅ 4H 2 O (2.3615 g) was dissolved in distilled water (20 mL) to create an aqueous solution and placed in a beaker, then the ultrasonic probe (Kunshan Ultrasound Instrument Co., Ltd, Jiangsu, China) was placed in the aqueous solution. Under certain ultrasonic working parameters (Ultrasound treatment was performed at a fixed frequency (20 kHz), and the ultrasonic power was at 600 w with 20 s sonication and 3 s resting time), phosphoric acid solution (0.411 mL phosphoric acid was dissolved in 20 mL water) was added drop by drop to achieve a molar ratio of Ca: P, wherein it was 1.67 [55] . Then, co‐precipitant (10 mL) was added to adjust the pH to 11.…”

“…Under certain ultrasonic working parameters (Ultrasound treatment was performed at a fixed frequency (20 kHz), and the ultrasonic power was at 600 w with 20 s sonication and 3 s resting time), phosphoric acid solution (0.411 mL phosphoric acid was dissolved in 20 mL water) was added drop by drop to achieve a molar ratio of Ca: P, wherein it was 1.67. [55] Then, co-precipitant (10 mL) was added to adjust the pH to 11. After ultrasonic dispersion was completed, the milky white suspension was centrifuged at 10000 rpm for 15 min, accordingly washed three times with water and alcohol, and dried in the vacuum desiccator at 50 °C for 2 h to obtain HA powder.…”