Influence of oleic acid on the nucleation and growth of 4-N,N-dimethylamino-4-N-methyl-stilbazoliumtosylate (DAST) crystals

CrystEngComm ◽  
2015 ◽  
Vol 17 (9) ◽  
pp. 1989-1996 ◽  
Author(s):  
Tina Thomas ◽  
Jerald V. Ramaclus ◽  
Fausto P. Mena ◽  
Edgar Mosquera ◽  
P. Sagayaraj ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Fatty Acid ◽  
Single Crystals ◽  
Nucleation And Growth ◽  
Solvent Evaporation ◽  
Solvent Evaporation Method ◽  
Evaporation Method

A simple solvent evaporation method, to control the nucleation and morphology of DAST single crystals is explored using a fatty acid as an additive.

scholarly journals Growth of nylon 6 single crystals by a solvent-evaporation method.

1991 ◽  
Vol 47 (8) ◽  
pp. 407-411
Author(s):  
Toshio Kunugi ◽  
Tadayuki Harada ◽  
Kazuhiro Nakazawa ◽  
Kazuo Miyake ◽  
Akihiro Suzuki
Keyword(s):  
Single Crystals ◽  
Nylon 6 ◽  
Solvent Evaporation ◽  
Solvent Evaporation Method ◽  
Evaporation Method

Room temperature growth of CH3NH3PbCl3 single crystals by solvent evaporation method

CrystEngComm ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 656-661 ◽  
Author(s):  
Pronoy Nandi ◽  
Chandan Giri ◽  
Diptikanta Swain ◽  
U. Manju ◽  
Dinesh Topwal
Keyword(s):  
Single Crystals ◽  
Room Temperature ◽  
Solvent Evaporation ◽  
Crystalline Quality ◽  
Solvent Evaporation Method ◽  
High Crystalline Quality ◽  
Temperature Growth ◽  
Evaporation Method ◽  
First Time

Rectangular shaped, high crystalline quality, defect free and colorless 3D perovskite single crystals of CH3NH3PbCl3 were grown using the solvent evaporation method at room temperature for the first time.

scholarly journals An investigation on the behavior and morphology of sulphanilamide crystallization in different nucleation conditions

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Smita Shivraj Dasari ◽  
Ajit Kumar Tallapaka ◽  
Jyothi Thati
Keyword(s):  
Crystal Growth ◽  
Single Crystals ◽  
Solvent Evaporation ◽  
Crystal Formation ◽  
Active Pharmaceutical Ingredients ◽  
Solvent Evaporation Method ◽  
Evaporation Method ◽  
Pharmaceutical Ingredients ◽  
Cooling Method ◽  
Pharmaceutical Industries

Abstract Background Crystallization is used as a purification process in majority of the industries such as pharmaceuticals, food products, chemicals, catalysts, and cosmetics. Crystallization of active pharmaceutical ingredients is carried out to increase the dissolution rate and attain sufficient bioavailability in pharmaceutical industries. It can also enhance the flow properties and drug dosage control of the active pharmaceutical ingredients. Single crystals give us a lucid understanding of the intrinsic properties of a material. A material made up of many crystals will have grain boundaries which do not allow us to measure properties such as thermal and electrical resistance effectively. Single crystals will not have defects or impurities in them. Thus, help us in making comparisons with other materials and contribute to a better understanding of particular behaviors. Therefore, it is important to investigate the growth of single crystals. Sulphanilamide is a sulpha class drug used as an intermediate and starting material for the production of various drugs. It is an antibacterial agent and is often used in pharmaceutics and cosmetics. In this study, we wanted to obtain sulphanilamide crystals by two different crystallization methods and compare the results gathered. Sulphanilamide usually crystallizes in the form of needles, thus is ideal for the purpose of this study. In this work, crystallization of sulphanilamide was carried out by cooling method and solvent evaporation method. In Cooling method as temperature was brought down the crystals separated out. On the other hand, in solvent evaporation method, the solvent evaporated leaving behind the crystals. The process parameters that varied included stirring rate of the solution at a constant temperature, concentration of the solute in a constant volume of solvent, solvent systems chosen-acetone, methanol and ethanol, and time allowed for crystallization. Results Crystals were obtained under the varying conditions. Characterization of the crystals formed was carried out using X-ray diffraction method, scanning electron microscopy, and differential scanning calorimetry. The size and morphology of the crystals formed was observed and the results were compared. It was found that the crystals obtained from using methanol as solvent, with high concentration of solute, gave the most uniform and large-sized cubic crystals under solvent evaporation method. The surface of the crystal was also seen to be smooth with well-defined edges as shown in the SEM images. Stirring reduced the size of crystals formed, and longer time of crystal formation resulted in larger crystals. Solvent evaporation method gave more uniform crystals compared to cooling method. Conclusion This study gives us an understanding of how each parameter affects crystal growth. Thus, optimum conditions for crystal growth can be determined.

Glibenclamide-Nicotinamide Cocrystals Synthesized by The Solvent Evaporation Method to Enhance Solubility and Dissolution Rate of Glibenclamide

2019 ◽  
Vol 9 (01) ◽  
pp. 21-26
Author(s):  
Arif Budiman ◽  
Ayu Apriliani ◽  
Tazyinul Qoriah ◽  
Sandra Megantara
Keyword(s):  
Solvent Evaporation ◽  
Physical Mixture ◽  
Dissolution Profile ◽  
Solvent Evaporation Method ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Evaporation Method ◽  
Dissolution Properties ◽  
Mixture Characterization

Purpose: To develop glibenclamide-nicotinamide cocrystals with the solvent evaporation method and evaluate their solubility and dissolution properties. Methods: Cocrystals of glibenclamide-nicotinamide (1:2) were prepared with the solvent evaporation method. The prediction of interactive cocrystals was observed using in silico method. The solubility and dissolution were performed as evaluation of cocrystals. The cocrystals also were characterized by differential scanning calorimetry (DSC), infrared spectrophotometry, and powder X-ray diffraction (PXRD). Result: The solubility and dissolution profile of glibenclamide-nicotinamide cocrystal (1:2) increased significantly compared to pure glibenclamide as well as its physical mixture. Characterization of cocrystal glibenclamide-nicotinamide (1:2) including infrared Fourier transform, DSC, and PXRD, indicated the formation of a new solid crystal phase differing from glibenclamide and nicotinamide. Conclusion: The confirmation of cocrystal glibenclamide-nicotinamide (1:2) indicated the formation of new solid crystalline phases that differ from pure glibenclamide and its physical mixture

Preparation and Evaluation of Glipizide Tablets Containing both Enhanced and Sustained Release Solid Dispersions

1970 ◽  
Vol 2 (4) ◽  
pp. 714-725
Author(s):  
Adel M. Aly ◽  
Ahmed S. Ali
Keyword(s):  
Blood Glucose ◽  
Blood Glucose Level ◽  
Glucose Level ◽  
Solid Dispersions ◽  
Solvent Evaporation ◽  
In Vivo Studies ◽  
Solvent Evaporation Method ◽  
Evaporation Method ◽  
Tablet Formulations

: Glipizide (GZ) is an oral blood-glucose-lowering drug of the sulfonylurea class characterized by its poor aqueous solubility. Aiming for the production of GZ tablets with rapid onset of action followed by prolonged effect; GZ-Polyethylene glycol (PEG 4000 and 6000) solid dispersions with different ratios, (using melting and solvent evaporation method), as well as, coprecipitate containing GZ with polymethyl-methacrylate (PMMA) were prepared. Four tablet formulations were prepared containing; a) GZ alone, b) GZ: PEG6000, 1:10, c) GZ:PMMA 1:3, and, d)both GZ:PEG6000 1:10 and GZ:PMMA 1:3. The solvent evaporation method showed more enhancement of GZ solubility than the melting one, and this solubilizing effect increased with PEG increment. Generally, PEG6000 showed more enhancement of dissolution than PEG4000 especially at 1:10 drug: polymer ratio (the most enhancing formula). Also, the prepared tablet formulations showed acceptable physical properties according to USP/NF requirements. The dissolution results revealed that tablets containing PEG6000 (1:10) have the most rapid release rate, followed by the formula containing both PEG6000 and PMMA, while that including PMMA alone showed the slowest dissolution rate. Moreover, In-vivo studies for each of the above four formulations, were performed using four mice groups. The most effective formula in decreasing the blood glucose level, through the first 6 hours, was that containing GZ and PEG6000, 1:10. However, formula containing the combination of enhanced and sustained GZ was the most effective in decreasing the blood glucose level through 16 hours. Successful in-vitro in-vivo correlations could be detected between the percent released and the percent decreasing of blood glucose level after 0.5 hours.

Formulation Design and Optimization of Repaglinide Solid Dispersions by Central Composite Design

2018 ◽  
Vol 11 (6) ◽  
pp. 4337-4348
Author(s):  
Bhikshapathi D. V. R. N. ◽  
Srinivas I
Keyword(s):  
Central Composite Design ◽  
Dissolution Rate ◽  
Solid Dispersion ◽  
Solid Dispersions ◽  
Solvent Evaporation ◽  
Release Mechanism ◽  
Solvent Evaporation Method ◽  
Onset Of Action ◽  
Evaporation Method ◽  
Central Composite

Repaglinide is a pharmaceutical drug used for the treatment of type II diabetes mellitus, it is characterized with poor solubility which limits its absorption and dissolution rate and delays onset of action. In the present study, immediate release solid dispersion of repaglinide was formulated by solvent evaporation technique. Repaglinide solid dispersions were prepared using PEG 8000, Pluronic F 127 and Gelucire 44/14 by solvent evaporation method. A 3-factor, 3-level central composite design employed to study the effect of each independent variable on dependent variables. FTIR studies revealed that no drug excipient interaction takes place. From powder X-ray diffraction (p-XRD) and by scanning electron microscopy (SEM) studies it was evident that polymorphic form of repaglinide has been converted into an amorphous form from crystalline within the solid dispersion formulation. The correlation coefficient showed that the release profile followed Higuchi model anomalous behavior and hence release mechanism was indicative of diffusion. The obtained results suggested that developed solid dispersion by solvent evaporation method might be an efficacious approach for enhancing the solubility and dissolution rate of repaglinide.

A simple and high efficient composite based on g-C3N4 for super rapid removal multiple organic dyes in water under sunlight

2022 ◽  
Author(s):  
Siwei Yang ◽  
Qiang Sun ◽  
Weihang Han ◽  
Yuanfang Shen ◽  
Zhigang Ni ◽  
...  
Keyword(s):  
Organic Dyes ◽  
Solvent Evaporation ◽  
Solvent Evaporation Method ◽  
Evaporation Method ◽  
High Efficient ◽  
Rapid Removal ◽  
Porous Composites

A simple and high efficient porous composites via the solvent evaporation method using g-C3N4 and NiSO4 was developed. It can super rapidly remove multiple organic dyes in water including rhodamine...

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