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Studies on sintering process of synthetic hydroxyapatite

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Malina D., Biernat K., Sobczak-Kupiec A.
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2013
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vol. 60
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issue 4
851-855
EN
In this study the effect of sintering process in different temperatures on microstructure and morphological properties of sintered hydroxyapatite (HAp) was investigated. HAp powder was prepared by wet precipitation method from following reagents: Ca(OH)2 + H3PO4 in an alkaline conditions. Thermal analysis (TA), X-Ray diffraction method (XRD), FT-IR spectrometry (FT-IR) and scanning electron microscopy (SEM) were used to elaborate the phase composition and properties of sintered HAp samples and raw HAp powder as well. The total and apparent density and total porosity of sintered compacts, shrinkage and weight loss during the sintering were also measured. The results show that there is a difference in sintering behavior of synthetic hydroxyapatites depending on sintering temperature. The main differences refer to the loss of mass, shrinkage, changes in porosity and density of the investigated materials.
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Propolis – beekeeping medicinal product

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Sobczak-Kupiec A., Tyliszczak B., Bialik-Wąs K., Wzorek Z.
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PL
The paper presents the healing properties and biological activity of propolis, commonly known as bee glue. Propolis is a natural product collected by bees from buds of plants and bark of trees, then moistened with bee enzymes. Propolis is widely used for general treatment, skin affections, and as an anti-inflammatory agent for ulcers and hard-to-heal wounds. Propolis, due to its properties, is called an antibiotic of the 21st century.
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