Mechanochemical Synthesis of Polymorphic Urea ⋅ Adipic Acid Cocrystal as a Sustained‐Release Nitrogen Source

ChemSusChem ◽  
2021 ◽  
Author(s):  
Shalika Parakatawella ◽  
Diptajyoti Gogoi ◽  
Poonam Deka ◽  
Yizhi Xu ◽  
Chanaka Sandaruwan ◽  
...  
Keyword(s):  
Sustained Release ◽  
Nitrogen Source ◽  
Adipic Acid ◽  
Mechanochemical Synthesis

scholarly journals Mechanochemical Synthesis of Cocrystals of Betulin with Adipic Acid

2020 ◽  
pp. 511-524
Author(s):  
Svetlana A. Myz ◽  
Mikhail A. Mikhailenko ◽  
Anastasiya V. Mikhailovskaya ◽  
Anatoly A. Politov ◽  
Svetlana A. Kuznetsova ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Adipic Acid ◽  
Mechanochemical Synthesis ◽  
Mechanical Treatment ◽  
X Ray Diffraction ◽  
X Ray ◽  
Grinding Method

The cocrystal of betulin with adipic acid was prepared using a liquid-assisted grinding method. The formation of cocrystal was confirmed by powder X-ray diffraction and IR spectroscopy methods. In order to choose a liquid for preparing cocrystal, solvents of different polarity were compared. It was shown that cocrystal of betulin with adipic acid was formed if solvents were used during mechanical treatment, in which the increased solubility of adipic acid was observed

1558: Local Injection of Sustained-Release Antiandrogen Formulation into a Target Prostatic Site: An Experimental Study

2007 ◽  
Vol 177 (4S) ◽  
pp. 515-515
Author(s):  
Nobuyuki Goya ◽  
Kotara Gotanda ◽  
Yasuko Tomizawa ◽  
Hiroshi Toma
Keyword(s):  
Experimental Study ◽  
Sustained Release ◽  
Local Injection

Effects of release modifier on Carvedilol release from Kollidon SR based matrix

2012 ◽  
Vol 1 (8) ◽  
pp. 186 ◽  
Author(s):  
Urmi Das ◽  
Mohammad Salim Hossain
Keyword(s):  
Drug Release ◽  
Sustained Release ◽  
Microcrystalline Cellulose ◽  
Matrix Tablets ◽  
Dissolution Time ◽  
Release Mechanism ◽  
Matrix Tablet ◽  
Weight Variation ◽  
The Matrix ◽  
Tablet Formulations

<p>Sustained release Carvedilol matrix tablets constituting Kollidon SR were developed in this study in an attempt to investigate the effect of release modifiers on the release profile of Carvedilol from matrix. Three matrix tablet formulations were prepared by direct compression of Kollidon SR in combination with release modifier (HPMC and Microcrystalline Cellulose) and magnesium stearate. Tablets containing only Kollidon SR with the active ingredient demonstrated a rapid rate of drug release. Incorporation of HPMC in the matrix tablet prolonged the release of drug but incorporation of Microcrystalline Cellulose showed superimposable release pattern with an initial burst effect as confirmed by mean dissolution time and Higuchi release rate data. After 7 hours of dissolution, Carvedilol release from the matrix systems were 91.42%, 83.41%, from formulation F1 and F2 respectively. Formulation F3 exhibited 100 % release at 4 hours. All the tablet formulations showed acceptable pharmaco-technical properties and complied with the in-house specifications for tablet weight variation, friability, hardness, thickness, and diameter. Prepared tablets also showed sustained release property for carvedilol. The drug release mechanism from the matrix tablets of F1 and F2 was found to be followed by Fickian and F3 by Non-Fickian mechanism.</p><p>DOI: <a href="http://dx.doi.org/10.3329/icpj.v1i8.11095">http://dx.doi.org/10.3329/icpj.v1i8.11095</a></p> <p>International Current Pharmaceutical Journal 2012, 1(8): 186-192</p>

Sign in / Sign up

Export Citation Format

Share Document