Ceramics based on rhenanite CaNaPO4 with density of 0.94 g/cm3 and compressive strength 10.3 MPa was obtained via firing at 900 °C composite cement-salt stone prepared from a hardening powder mixture calcium citrate tetrahydrate Ca3(C6H5O7)2∙4H2O sodium dihydrogen phosphate NaH2PO4. The phase composition the samples cement–salt represented by monetite CaHPO4, unreacted tetrahydrate. According t...

Calcium oxide was reported in the sol-gel-derived hydroxyapatite (HA) as an unavoidable major impurity. In this study phase purity of HA synthesized by sol-gel route was explored using precursors of calcium nitrate tetrahydrate and triethyl phosphate. Two different drying methods, the fast drying of as-prepared precursors and the slow drying of aged precursors were adopted as major processing v...

The main motive of the study is to analyze and compare crystallographic changes using X-Ray diffraction method for zinc substituted hydroxyapatite. Materials Methods: Different types hydroxyapatite are used. Calcium nitrate tetrahydrate, chloride hexahydrate, diammonium hydrogen phosphate ammonium hydroxide solutions added they mixed with solution. ultrasonic was used carry precipitation method...

In this study, the effects and interactions of reaction time and capping agent assistance during sol-gel synthesis of magnesium substituted hydroxyapatite nanopowder (MgHA) on hydroxyapatite (HA) to β-tricalcium phosphate (β-TCP) ratio, Ca/P ratio and mean crystallite size was examined experimentally as well as through statistical analysis. MgHA nanopowders were synthesized by sol-gel technique...

In order to improve the traditional freezing crystallization process of calcium nitrate in nitric phosphate process, crystal growth experiments by adding Ca(NO3)2·4H2O seeds in supersaturated calcium nitrate solution in a Circulating Fluidized Bed (CFB) crystallizer were carried out on crystal growth kinetics. The results showed that the growth of C...

Microcapsules made of biopolymers are of both scientific and technological interest and have many potential applications in medicine, including their use as controlled drug delivery devices. The present study makes use of the electrostatic interaction between polycations and polyanions to form a multilayered microcapsule shell and also to control the loading and release of charged drug molecule...

this experiment was carried out on lily cut flowers in greenhouse conditions and at the agricultural faculty of guilan university. the statistical factorial experiment was performed in a completely randomized design of three replications. the main factors studied were cultivars navona (asiatic) and fangio (la) along with four levels of calcium sulfate (0, 2.5, 5 and 10 mm) in combination with t...

this experiment was carried out in the agricultural faculty of guilan university. the factorial experiment was performed based on a completely randomized design of three replications. the experimental factors comprised of: lillium cultivars, navona (asiatic) and fangio (la), four levels of calcium nitrate (0, 1, 1.5 and 2 mm) in combination with three levels of iba (500, 750 and 1000 ppm) . the...

In this work, LiCoPO4 nanoparticles were synthesized by supercritical fluid method using cobalt nitrate hexahydrate (Co(NO3)2 6H2O) and cobalt acetate tetrahydrate (C4H6CoO4 4H2O) as starting materials. The effect of starting materials on particle morphology, size, and the crystalline phase were investigated. The as-synthesized samples were systematically characterized by XRD, TEM, STEM, EDS, B...

The title complex, [Nd(C(6)H(6)NO(3)S)(2)(C(12)H(8)N(2))(2)(H(2)O)(3)]NO(3)·4H(2)O, comprises a mononuclear cation, an NO(3) (-) anion and two uncoordinated water mol-ecules; the Nd(III) cation, one coordinated water mol-ecule, and the NO(3) (-) anion each lie on a twofold axis of symmetry. The Nd(III) ion exhibits an NdN(4)O(5) coordination environment comprising two O atoms of two monodentate...