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Henan Tongwei Medical Equipment Co., LtdCall us : +86 − −19139704654 // Email us : [email protected]
2009/1/30Crystal morphology engineering of a macrolide antibiotic erythromycin A dihydrate was investigated as a tool for tailoring tabletting performance of pharmaceutical solids Molecular structures for the model API erythromycin A a and hydroxypropylmethylcellulose a pharmaceutical excipient used as crystal habit modifier in this study b
NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities Hugo E Gottlieb * Vadim Kotlyar and Abraham Nudelman* Department of Chemistry Bar-Ilan University Ramat-Gan 52900 Israel Received June 27 1997 In the course of the routine use of
Effects of solvent treatment and high-pressure homogenization process on dispersion properties of palygorskite Jixiang Xu a b Wenbo Wang a c Aiqin Wang a c ⁎ a Center of Eco-material and Green Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Science Lanzhou 730000 China
2010/2/15The crystal habit prediction as adjusted to allow for the solvent effects (Fig 4(b)) provides a good match to the experimental morphology (Fig 4(c)) As discussed above the solvent effects depend on the different surface chemistry and the step structure of theE s
The crystal morphology formed under different crystallization conditions was analyzed using an electron microscope and X-ray diffraction to determine the specific effects of each solvent It was found that the quantity of the solvents in the crystallization solutions has a large influence on the crystal tip morphology and on the crystal aspect ratio
2012/3/26Effects of soluble impurities boiling and melting points Thread starter sgstudent Start date Mar 23 2012 Mar 23 2012 #1 Solution is a solution doesn't matter what the solvent is - liquid metals are not much different from other liquids When we talk about we
However different types of impurity can have different effects some can increase solubility but others can decrease solubility For this reason if the source grade or purity of the solute or solvent is changed in any way the solubility and/or stability of the solute will need re-assessing
Effects of Impurities on Crystal Growth Processes available for technical discussions and has given her time for proof reading my reports With the good associations of Prof Tan and Dr Chow I have certainly improved my scientific writing and presentation skills to
Several impurities including Te Zn and Hg were found to have effects on ease of nucleation on {111} planes and the relative stability of {111} and {100} facets of III-V compounds The results are interpreted qualitatively using a kinetic analysis
Richard L Pitter and William G Finnegan Effects Of Impurities And Growth Rate On Ice Crystal Morphology: The Mechanistic Link Proc SPIE 1060 Nonlinear Optical Beam Manipulation and High Energy Beam Propagation Through the Atmosphere (8 August
Effect of steric hindrance resulting from solvent topography on the resultant crystal morphology was examined via cooling crystallization of various carboxylic acids in isomeric butyl and pentyl alcohols Our experiments show that the magnitude of hindrance is
2019/7/31Impurities also affect the crystal morphology and the addition of Si Fe and Na promotes the formation of needle-like crystals compared with other impurities X-ray diffraction results show that the preferred crystal growth direction is (020) and the interplanar spacing of the crystals is affected by the element radius of the impurities
2014/2/1The crystal morphology of zinc lactate trihydrate in the absence or presence of impurities (viz succinic acid L-malic acid and D-malic acid) is investigated by molecular simulation based on surface docking model and COMPASS force field Combing simulation
Yang XY Qian G Zhang XY Duan XZ Zhou XG (2014) Effects of solvent and impurities on crystal morphology of zinc lactate Trihydrate Chin J Chem Eng 22:22–226 Google Scholar 19 Vu LTT Huynh L Hourigan JA (2009) Effects of solvents on characteristics of crystalline lactose extracted in ternary and quaternary systems Adv Powder Technol 20:251–256 CrossRef Google Scholar
Richard L Pitter and William G Finnegan Effects Of Impurities And Growth Rate On Ice Crystal Morphology: The Mechanistic Link Proc SPIE 1060 Nonlinear Optical Beam Manipulation and High Energy Beam Propagation Through the Atmosphere (8 August
It has been recognized that different crystal morphologies can be formed by adding impurities However a quantitative understanding is lacking on how the impurities change the crystal shape and/or size KDP crystallisation is chosen in this study because of the
Hammond RB Pencheva K Ramachandran V Roberts KJ (2007) Application of grid-based molecular methods for modeling solvent-dependent crystal growth morphology: aspirin crystallized from aqueous ethanolic solution Cryst Grow Des 7:1571–1574 CrossRef Google Scholar
The attenuation of visible and infrared radiation by atmospheric ice particles is influenced by the wavelength of the radiation the particle size the detailed particle shape and its orientation with respect to the incident beam Our studies have revealed the importance of soluble ionic salts and growth rate on the detailed shapes of ice crystals The mechanisms of crystal growth from the
This is a 10th-grade question The melting point of a substance decreases with increase in presence of impurities in it The melting point of ice decreases from 0 C to -22 C on mixing salt in it in proper proportion That is why salt is added to make freezing mixtures
2010/2/151 J Hazard Mater 2010 Feb 15 174(1-3):175-80 doi: 10 1016/j jhazmat 2009 09 033 Epub 2009 Sep 15 A molecular dynamics simulation of solvent effects on the crystal morphology of HMX Duan X(1) Wei C Liu Y Pei C Author information: (1)College of Materials Science and Engineering Southwest University of Science and Technology Mianyang 621010 China dxhui812163
The effect of solvent on crystal morphology J Cryst Growth 2001 230 (1–2) 277 – 284 DOI: 10 1016/S0022-0248(01)01341-0 Differences in the obsd and calcd shapes of sulfathiazole forms 1 3 4 and 5 are attributed to solvent effects which correlate with
Solvent effects on the crystal structure and morphology of pharmaceutical dirithromycin molecules were systematically investigated using both experimental crystallization and theoretical simulation Dirithromycin is one of the new generation of macrolide antibiotics with two polymorphic forms (Form I and Form II) and many solvate forms Herein six solvates of the dirithromycin including
Effects of Solvent and Impurities on Crystal Morphology of Zinc Lactate Trihydrate YANG Xiangyu QIAN Gang ZHANG Xiangyang DUAN Xuezhi ZHOU Xinggui State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China
First principle study of crystal growth morphology: An application to crystalline urea M K Singh* Laser Materials Development Devices Division Raja Ramanna Centre for Advanced Technology Indore (M P) The growth morphology and the effects of surface
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