Results 11 to 20 of about 2,723 (289)

Potencial of different hydroxyapatites as biomaterials in the bone remodeling [PDF]

open access: yesActa Cirúrgica Brasileira, 2018
Purpose: To analyze the therapeutic potentials of different hydroxyapatites used for the correction of bone defects in rats. Methods: Forty rats, male, albino wistar, were distributed in 4 groups. They were submitted to a 3.5 mm defect in tibia.
Pedro Carvalho Cassino   +7 more
doaj   +2 more sources

Lactic Acid Conversion to Acrylic Acid Over Fluoride-Substituted Hydroxyapatites

open access: yesFrontiers in Chemistry, 2020
One of the most interesting intermediates for the chemical industry is acrylic acid, which can be derived from lactic acid by catalytic dehydration in the gas phase.
Robert Wojcieszak   +4 more
doaj   +2 more sources

Soft mechanochemical synthesis and thermal stability of hydroxyapatites with different types of substitution [PDF]

open access: yesChimica Techno Acta, 2022
The feasibility of soft mechanochemical synthesis was studied here for hydroxyapatite with various types of substitution. It was shown that this method allows obtaining hydroxyapatites substituted with copper or iron cations and hydroxyapatites ...
Natalya V. Eremina   +3 more
doaj   +2 more sources

Co‐Doped (Na+, Mg2+, Zn2+, Fe3+)‐Carbonated Hydroxyapatites and Composites with MIIFe2O4: Synthesis, Mechanic, Magnetic, and Antibacterial Properties for Medical Application [PDF]

open access: yesChemistryOpen
Co‐doped (Na+, Mg2+, Zn2+, Fe3+, CO32‐)‐calcium phosphates and their composites with 10 or 25 wt% of (Mg/Zn)Fe2O4 were synthesized via a one‐step method from aqueous solutions and heated to 600°C.
Yeva Komashchenko   +8 more
doaj   +2 more sources

The Study of Nanosized Silicate-Substituted Hydroxyapatites Co-Doped with Sr2+ and Zn2+ Ions Related to Their Influence on Biological Activities [PDF]

open access: yesCurrent Issues in Molecular Biology, 2022
Nanosized silicate-substituted hydroxyapatites, characterized by the general formula Ca9.8−x−nSrnZnx(PO4)6−y(SiO4)y(OH)2 (where: n = 0.2 [mol%]; x = 0.5–3.5 [mol%]; y = 4–5 [mol%]), co-doped with Zn2+ and Sr2+ ions, were synthesized with the help of a ...
Justyna Rewak-Soroczynska   +4 more
doaj   +2 more sources

Long-Term Outcomes and a Radiological Assessment of Hydroxyapatite–Tricalcium Phosphate-Coated Total Hip Arthroplasty (Trilogy/Zimmer): A Long-Term Follow-Up Study [PDF]

open access: yesMedicina
Background and Objectives: Favorable short- and mid-term results for hydroxyapatite (HA)–tricalcium phosphate (TCP)-coated total hip arthroplasty (THA) (Trilogy/Zimmer) have been reported in the literature; however, the long-term results beyond 15 years ...
Shinya Ibuchi   +5 more
doaj   +2 more sources

Sorption mechanism of copper ions on synthetic and natural dentine hydroxyapatites [PDF]

open access: yesJournal of Materials and Engineering Structures, 2019
Removal of copper ions from aqueous solutions on synthetic and dentine waste hydroxyapatites (HAP) was investigated in batch sorption experiments. Kinetics of sorption followed a pseudo-first order model.
Farida FERNANE   +3 more
doaj   +1 more source

HIGUCHI MODEL APPLIED TO IONS RELEASE FROM HYDROXYAPATITES

open access: yesStudia Universitatis Babes-Bolyai Chemia, 2021
n this study, the ions release of physiological elements from pure stoichiometric hydroxyapatite, HAP, and from multi-substituted hydroxyapatite, ms-HAPs, containing 1.5%Mg, 0.2%Zn, 0.2%Si and 5 %Sr, noted HAPc-5%Sr, and from HAPc-10%Sr, in water and in
Aurora MOCANU   +7 more
doaj   +3 more sources

Mg and Si substituted hydroxyapatite: Behaviour in simulated body fluid [PDF]

open access: yesStomatološki glasnik Srbije, 2022
Due to its similarity with biological apatite found in vertebrate hard tissues, calcium hydroxyapatite is one of the most investigated materials in bone tissue engineering.
Petrović Božana   +4 more
doaj   +1 more source

SILICON RELEASE FROM HYDROXYAPATITES IN WATER AND SIMULATED BODY FLUID

open access: yesStudia Universitatis Babes-Bolyai Chemia, 2017
Nanostructured hydroxyapatite (HAP) and silicon substituted hydroxyapatites (HAP-Si), with 0.47 and 2.34 wt% Si, were prepared by wet precipitation method.
Oana CADAR   +7 more
doaj   +3 more sources

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