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Showing 1 to 13 of 13 for “"Hemihydrate"”.
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Analytical Studies Concerning the Stability of Betamethasone Valerate and Fusidic acid Hemihydrate in Topical Pharmaceutical Preparations
… betamethasone 17-valerate and fusidic acid hemihydrate in topical pharmaceutical formulations. In particular, the work concentrates on formulation factors affecting the intra-molecular isomerisation of betamethasone 17-valerate to 21-valerate in a developmental topical cream for treatment of …
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Evaluation of carboplatin-impregnated calcium sulfate hemihydrate beads as a local treatment option for feline injection site-associated sarcomas
… of carboplatin-impregnated calcium sulfate hemihydrate (C-I CSH) beads. Sample: Five immortalized cell lines from histologically confirmed, primary FISASs. Procedures: For each cell line, one 96-well microplate was used for each time point (24, 48, 72 hours). In each microplate, 3 wells were …
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Comparative Studies On Standard and Fire-Rated Gypsum Wallboards.
… (CaSO<sub>4</sub>•2H<sub>2</sub>O) form to the hemihydrate (CaSO<sub>4</sub>•½H<sub>2</sub>O) and from the hemihydrate to the anhydrous form (CaSO<sub>4</sub>) in a second dehydration. The present paper is a comparative study of commercially available standard, fire-rated Type X and firerated …
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Laboratory Scale Study of Calcium Sulfate Hydration Forms
… dihydrate, and the hydration of calcium sulfate hemihydrate as well as anhydrous calcium sulfate. The lab-scale kinetics of these processes were studied using thermogravimetric analysis and sorption analysis. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize …
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Isobaric and isothermal dehydration studies on pure soap crystals
… Thiessen and Stauff alpha sodium stearate as a hemihydrate with monoclinic crystal symmetry established by Buerger and his coworkers. Unfortunately, however, such wide agreement does not extend over proposals for at least nine other crystalline phases said to exist at room temperature and …
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Leached chrysotile asbestos : characterization, leaching mechanism and use in the synthesis of zeolites
… transformation of chrysotile to amorphous silica hemihydrate. In the second part, three types of zeolites were synthesized (Na-Y, Na-X and Na-A) using as starting material both silica gel (conventional method) and leached asbestos (new method). In a kinetic study of the crystallization of Na-A …
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Supramolecular derivatives of selected bioactive compounds : a physicochemical study
… (2MES), in the form of a hemihydrate, remained unchanged when recrystallised from various solvents. Several CDs were used for possible 2-methoxyestradiol inclusion; these were α-, β -,γ-CD, and nine derivatised cyclodextrins. Co-precipitation and kneading techniques were …
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Metal complexes as models for vitamin B₆ catalysis
… (3-Hydroxypyridyl-2-methylene)valinatocopper( II) hemihydrate have been prepared from L̳-valine. Synthetic methods and characterization data are given. Also prepared were the bis-chelate amino acid ester complexes, Bis[N- (2-ethoxycarbonyl-l-propyl)salicylaldiminato]copper(II) and …
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Evaluating the Potential of Scaling due to Calcium Compounds in Hydrometallurgical Processes
… The stability regions of CaSO4 hydrates (gypsum, hemihydrate and anhydrite) depend on solution conditions, i.e., temperature, pH and concentration of ions present. The transformation between CaSO4 hydrates is one of the common causes of scale formation. A systematic study was carried out to …
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Evaluation of the in vitro elution characteristics of carboplatin-impregnated calcium sulfate beads
… from carboplatin-impregnated calcium sulfate hemihydrate (CSH) beads in vitro. Sample: Sixty carboplatin-impregnated CSH beads and 9 CSH beads without added carboplatin (controls) Procedures: Carboplatin-impregnated CSH beads (each containing 4.6 mg carboplatin [2.4 mg platinum]) were placed …
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Introducing loop-closure for phosphates into a provincial development strategy: An analysis of overlaps of primary and secondary phosphate processing technologies
… simulations of Dihydrate phosphogypsum (DH) and Hemihydrate phosphogypsum (HH) producing processes were done. The materials balance simulations included a base case where a secondary phosphate source was not introduced in the process and the case where it was introduced into the processes in the …
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NEW APPROACHES FOR MITIGATING ENVIRONMENTAL CONCERNS ASSOCIATED WITH COAL AND COAL COMBUSTION PRODUCTS
… a potential of Hg re-emission during gypsum-to-hemihydrate-to-gypsum transition, and (d) how Hg behaves in sulfite-rich scrubber material at higher temperatures and pressures. Ultimately, no direct correlation between the total Hg concentration of the parent coal and its associated FGD scrubber …
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Scale prevention in sea water evaporators: Part I design and construction
… hydroxide, 2.7 per cent calcium sulfate hemihydrate, 2.7 per cent silica dioxide, and 1.1 per cent ferric oxide. From the operation of these tests, it is concluded that both the pretreatment plant and the distilling unit operated satisfactorily within the limits of their design.