Polymorphism of spironolactone: An unprecedented case of monotropy turning to enantiotropy with a huge difference in the melting temperatures

IB Rietveld, M Barrio, P Lloveras, R Céolin… - International journal of …, 2018 - Elsevier
Spironolactone form I melts at about 70 degrees lower than form II, which is very unusual for
two co-existing polymorphs. The phase relationships involving this unprecedented case of …

Elucidating the dehydration mechanism of ondansetron hydrochloride dihydrate with a crystal structure

R Mizoguchi, H Uekusa - Crystal Growth & Design, 2018 - ACS Publications
In drug development, evaluating the stability of the hydrate is particularly important because
changes in the hydration state could cause alterations of the physicochemical properties. In …

[PDF][PDF] 聚乙二醇6000 对间尼索地平溶解性的影响

石晓伟, 孙萌萌, 王静, 杨彩琴 - 医药导报, 2014 - yydbzz.com
摘要目的研究聚乙二醇6000 对间尼索地平溶解度和体外溶出度的影响, 为间尼索地平剂型的
选择提供参考. 方法以聚乙二醇(PEG) 6000 为载体, 采用溶剂 熔融法制备间尼索地平固体分散 …

An Investigation into the Polymorphism and Crystallization of Levetiracetam and the Stability of its Solid Form

K Xu, X Xiong, L Guo, L Wang, S Li, P Tang… - Journal of …, 2015 - Elsevier
Levetiracetam (LEV) crystals were prepared using different solvents at different
temperatures. The LEV crystals were systematically characterized by X-ray powder …

[PDF][PDF] Synthesis and conversion thermodynamic study of crystalline and amorphous polymorphous complexes

Y Wang, Y Xin, M Wu, C Li, W Guo - Mater Sci, 2019 - pdf.hanspub.org
Two solid forms of crystalline (CryZn) and amorphous (AmZn) complexes based on urocanic
acid and ZnSO4∙ 7H2O were prepared by different approaches. X-ray single crystal …

Effects of m-nisoldipine on the activity and mRNA expression of four CYP isozymes in rats

Y Sun, Y Liu, X Zhang, C Wan, T Lyu, L Zhang - Xenobiotica, 2018 - Taylor & Francis
For the first time, a systemic in vivo investigation was employed to evaluate the potential
effects of m-nisoldipine on activities of rat cytochrome P450 enzymes (CYP1A2, CYP2C11 …

[HTML][HTML] 晶态, 无定形态同质异形配合物的合成及转化热力学研究

王雨杭, 辛雨濛, 吴梦琦, 李成勋, 郭伟 - Material Sciences, 2019 - hanspub.org
利用不同的方法制备出基于尿刊酸和ZnSO 4∙ 7H 2 O 的晶态(CryZn) 和无定形态(AmZn)
两种同质异形固体. 利用X-射线单晶衍射(XRD), X-射线粉末衍射(XRPD) …

On the dimorphism and the pressure–temperature state diagram of racemic m-nisoldipine, a dihydropyridine calcium ion antagonist

K Li, G Gbabode, G Coquerel, R Céolin… - Annales …, 2018 - Elsevier
The pressure-temperature phase diagram of the dimorphism of racemic m-nisoldipine is
constructed using temperatures and enthalpies of fusion of forms A and B. At ordinary …

Four solid forms of tauroursodeoxycholic acid and solid-state transformations: effects of temperature and milling

K Xu, S Zheng, L Guo, S Li, L Wang, P Tang, J Yan… - RSC …, 2015 - pubs.rsc.org
Four solid forms of tauroursodeoxycholic acid (TUDCA) were investigated by X-ray
diffraction, morphological analysis, thermogravimetry, differential scanning calorimetry, and …

[PDF][PDF] INTERNATIONAL JOURNAL OF RESEARCH IN PHARMACEUTICAL SCIENCES

WD Wardhani, YT Sipahutar - 2020 - pdfs.semanticscholar.org
Active pharmaceutical ingredients (API) are the main components in the
productionprocessofpharmaceuticalproducts. IftheAPIhasagoodquality, then it will lead to …