Photoluminescence of biogenic hydroxyapatite immobilized by europium and terbium cations

2020 ◽  
Author(s):  
Alexander Pivovarov ◽  
Sergey Pichkhidze ◽  
I. Gluhova ◽  
A. Gluhova ◽  
Vyacheslav Kochubey ◽  
...  
Keyword(s):  
Biogenic Hydroxyapatite

scholarly journals Temperature effect in physicochemical and bioactive behavior of biogenic hydroxyapatite obtained from porcine bones

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
P. A. Forero-Sossa ◽  
J. D. Salazar-Martínez ◽  
A. L. Giraldo-Betancur ◽  
B. Segura-Giraldo ◽  
E. Restrepo-Parra
Keyword(s):  
Structural Changes ◽  
Biological Fluid ◽  
Treatment Temperature ◽  
Mineral Phase ◽  
Calcination Temperatures ◽  
Bioactive Properties ◽  
Temperature Ranges ◽  
Compositional Changes ◽  
Type Substitution ◽  
Biogenic Hydroxyapatite

AbstractBiogenic hydroxyapatite (BHAp) is a widely used material in the biomedical area due to its similarities with the bone tissue mineral phase. Several works have been spotlighted on the thermal behavior of bone. However, little research has focused on determining the influence of calcination temperature in the physicochemical and bioactive properties of BHAp. In this work, a study of the physicochemical properties’ changes and bioactive response of BHAp produced from porcine femur bones using calcination temperatures between 900 to 1200 °C was conducted. The samples’ structural, morphological, and compositional changes were determined using XRD, SEM, and FTIR techniques. XRD results identified three temperature ranges, in which there are structural changes in BHAp samples and the presence of additional phases. Moreover, FTIR results corroborated that B-type substitution is promoted by increasing the heat treatment temperature. Likewise, samples were immersed in a simulated biological fluid (SBF), following the methodology described by Kokubo and using ISO 23317:2014 standard, for 3 and 7 days. FTIR and SEM results determined that the highest reaction velocity was reached for samples above 1000 °C, due to intensity increasing of phosphate and carbonate bands and bone-like apatite morphologies, compared to other temperatures evaluated.

Pb(II)-mediated precipitate transformation promotes Cr(VI) immobilization by biogenic hydroxyapatite

2021 ◽  
pp. 127584
Author(s):  
Sicong Lei ◽  
Chengyi Hong ◽  
Zhiqiang Dong ◽  
Jichen Zhang ◽  
Xiaoxian Zhang ◽  
...  
Keyword(s):  
Biogenic Hydroxyapatite

Characterization of biogenic hydroxyapatite derived from animal bones for biomedical applications

2018 ◽  
Vol 44 (9) ◽  
pp. 10525-10530 ◽  
Author(s):  
S. Ramesh ◽  
Z.Z. Loo ◽  
C.Y. Tan ◽  
W.J. Kelvin Chew ◽  
Y.C. Ching ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Animal Bones ◽  
Biogenic Hydroxyapatite

Effect of Aging Time in the Synthesis of Biogenic Hydroxyapatite Derived from Cockle Shell

2019 ◽  
Vol 19 ◽  
pp. 1208-1215
Author(s):  
Siti Hajar Saharudin ◽  
Jun Haslinda Shariffuddin ◽  
Noor Ida Amalina Ahamad Nordin ◽  
Aqeela Ismail
Keyword(s):  
Aging Time ◽  
Biogenic Hydroxyapatite ◽  
Cockle Shell

scholarly journals Development and Characterization of Sr-Containing Glass-Ceramic Composites Based on Biogenic Hydroxyapatite

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
Oleksii Kuda ◽  
Nataliia Pinchuk ◽  
Oleksandr Bykov ◽  
Tamara Tomila ◽  
Olena Olifan ◽  
...  
Keyword(s):  
Glass Ceramic ◽  
Ceramic Composites ◽  
Biogenic Hydroxyapatite

scholarly journals Forsterite/nano-biogenic hydroxyapatite composites for biomedical applications

2020 ◽  
Vol 8 (2) ◽  
pp. 373-386
Author(s):  
S.M. Naga ◽  
A.M. Hassan ◽  
M. Awaad ◽  
A. Killinger ◽  
R. Gadow ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Biogenic Hydroxyapatite

scholarly journals Comparative analysis of the prevention of caries by toothpastes with different compositions and their effect on the mineral structure of the oral fluid

2020 ◽  
Vol 26 (4) ◽  
pp. 23-28
Author(s):  
E. V. Matveeva ◽  
I. N. Antonova
Keyword(s):  
Oral Fluid ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
The People ◽  
Mineral Structure ◽  
Macro And Micronutrients ◽  
Antiinflammatory Effects ◽  
Natural Hydroxyapatite ◽  
Biogenic Hydroxyapatite

Introduction. One of the most attractive materials in the composition of toothpastes is hydroxyapatite with nanoscale crystals that contribute to the prolongation of remineralization due to the release of calcium and phosphorus. In some cases, macro- and micronutrients are introduced into preventive toothpastes; however, the dynamics of increasing their concentration in the oral fluid has not been studied enough.The objective was to study the effect of bioactive toothpaste with natural hydroxyapatite, enriched in nanodispersed particles of iron, zinc and copper, on the dynamics of the dental status and the level of copper, iron, zinc, magnesium and calcium in the oral fluid.Methods and materials. 26 patients were examined: 19 patients used the toothpaste being studied, and 7 patients used toothpaste, which did not have macro- and microelements. The determination of the Green-Vermilion hygiene index and the papillary-marginal-alveolar index was carried out, followed by calculation of the effectiveness of the cleansing and antiinflammatory effects. In the oral fluid, the method of electrothermal atomic absorption spectrometry was used for determination of the content of cations of copper, iron, zinc, magnesium and calcium.Results. One month after the start of the use of toothpaste with natural hydroxyapatites enriched with macro- and microelements, a statistically significant increase in the oral fluid of patient, levels of copper, iron, zinc and calcium was established. The effectiveness of the cleansing effect was 85 %, anti-inflammatory effectiveness – 90 %.Conclusion. The increase in the level of macro- and microelements in the oral fluid is due to the composition of the toothpaste containing, along with biogenic hydroxyapatite, nanodispersed particles of iron, zinc and copper.Authors declare no conflict of interest.The authors confirm that they respect the rights of the people participated in the study, including obtaining informed consent when it is necessary, and the rules of treatment of animals when they are used in the study. Author Guidelines contains the detailed information.

scholarly journals Si-modified BHA bioceramics as a drug delivery system: Effect of modification method on structure and Rifampicin release

2015 ◽  
Vol 9 (3) ◽  
pp. 125-129 ◽  
Author(s):  
Olena Sych ◽  
Nataliia Pinchuk ◽  
Valentyna Klymenko ◽  
Iryna Uvarova ◽  
Olga Budilina ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Marked Change ◽  
Uniform Structure ◽  
Structure And Properties ◽  
System Effect ◽  
Hydroxyapatite Ceramics ◽  
Modification Method ◽  
Out Of Sample ◽  
Biogenic Hydroxyapatite

The work is devoted to the investigation of two different methods for introduction of silicon into ceramics, based on biogenic hydroxyapatite (BHA), on the structure and properties. Thus, porous samples of Si-modified BHA-based ceramics containing 2 or 5 wt.% Si were prepared by using two different precursors, i.e. polymethylsiloxane polyhydrate and fine silica (Aerosil? 200) powder. After the modification with silicon a marked change in the structure of material was observed. The use of Aerosil? 200 permits preparation of a more uniform structure as compared to that obtained by using polymethylsiloxane polyhydrate. However, the latter promotes an increase in both the porosity of samples (from 43 to 62.3%) and their solubility in saline (from 0.18 to 1.20wt.%/day) as compared to the results obtained after the modification with Aerosil? 200, where maximal porosity and solubility were 48.5% and 0.23wt.%/day, respectively. At the same time, the modification of hydroxyapatite ceramics with silicon using silica makes it possible to prolong release of a drug (e.g. Rifampicin) out of sample pores for the first 24 h as compared to the ceramicsmodified with polymethylsiloxane polyhydrate.

Arsenic(V) Adsorption onto Biogenic Hydroxyapatite: Solution Composition Effects

2006 ◽  
Vol 180 (1-4) ◽  
pp. 75-82 ◽  
Author(s):  
Mariela Czerniczyniec ◽  
Silvia Farías ◽  
Jorge Magallanes ◽  
Daniel Cicerone
Keyword(s):  
Solution Composition ◽  
Composition Effects ◽  
Biogenic Hydroxyapatite
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