scholarly journals Using Cocrystals To Systematically Modulate Aqueous Solubility and Melting Behavior of an Anticancer Drug

2009 ◽  
Vol 131 (47) ◽  
pp. 17048-17049 ◽  
Author(s):  
Christer B. Aakeröy ◽  
Safiyyah Forbes ◽  
John Desper
Keyword(s):  
Anticancer Drug ◽  
Aqueous Solubility ◽  
Melting Behavior

scholarly journals Curcumin-loaded zeolite as anticancer drug carrier: effect of curcumin adsorption on zeolite structure

2020 ◽  
Vol 92 (3) ◽  
pp. 461-471
Author(s):  
Zahra Ahali Abadeh ◽  
Giovanna Saviano ◽  
Paolo Ballirano ◽  
M. Gabriella Santonicola
Keyword(s):  
Anticancer Drug ◽  
Anticancer Agents ◽  
Drug Carrier ◽  
Internal Surface ◽  
Aqueous Solubility ◽  
Type A ◽  
Internal Surface Area ◽  
Scanning Calorimetry ◽  
Vis Spectroscopy ◽  
Zeolite Type

AbstractIn this work we used a combination of different techniques to investigate the adsorption properties of curcumin by zeolite type A for potential use as an anticancer drug carrier. Curcumin is a natural water-insoluble drug that has attracted great attention in recent years due to its potential anticancer effect in suppressing many types of cancers, while showing a synergistic antitumor effect with other anticancer agents. However, curcumin is poorly soluble in aqueous solutions leading to the application of high drug dosage in oral formulations. Zeolites, inorganic crystalline aluminosilicates with porous structure on the nano- and micro-scale and high internal surface area, can be useful as pharmaceutical carrier systems to encapsulate drugs with intrinsic low aqueous solubility and improve their dissolution. Here, we explore the use of zeolite type A for encapsulation of curcumin, and we investigate its surface properties and morphology, before and after loading of the anticancer agent, using scanning electron microscopy (SEM), powder X-ray diffraction (XRD), differential scanning calorimetry (DSC), and UV-vis spectroscopy. Results are used to assess the loading efficiency of zeolite type A towards curcumin and its structural stability after loading.

scholarly journals A Contribution to the Solid State Forms of Bis(demethoxy)curcumin: Co-Crystal Screening and Characterization

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 720
Author(s):  
Steffi Wünsche ◽  
Lina Yuan ◽  
Andreas Seidel-Morgenstern ◽  
Heike Lorenz
Keyword(s):  
Aqueous Solubility ◽  
Melting Behavior ◽  
Water Mixture ◽  
Incongruent Melting ◽  
Active Components ◽  
Separation Processes ◽  
Equimolar Composition ◽  
Negative Effect ◽  
Crystallization From Solution ◽  
Crystallization From The Melt

Bis(demethoxy)curcumin (BDMC) is one of the main active components found in turmeric. Major drawbacks for its usage are its low aqueous solubility, and the challenging separation from other curcuminoids present in turmeric. Co-crystallization can be applied to alter the physicochemical properties of BDMC in a desired manner. A co-crystal screening of BDMC with four hydroxybenzenes was carried out using four different methods of co-crystal production: crystallization from solution by slow solvent evaporation (SSE), and rapid solvent removal (RSR), liquid-assisted grinding (LAG), and crystallization from the melt phase. Two co-crystal phases of BDMC were obtained with pyrogallol (PYR), and hydroxyquinol (HYQ). PYR-BDMC co-crystals can be obtained only from the melt, while HYQ-BDMC co-crystals could also be produced by LAG. Both co-crystals possess an equimolar composition and reveal an incongruent melting behavior. Infrared spectroscopy demonstrated the presence of BDMC in the diketo form in the PYR co-crystals, while it is in a more stable keto-enol form in the HYQ co-crystals. Solubility measurements in ethanol and an ethanol-water mixture revealed an increase of solubility in the latter, but a slightly negative effect on ethanol solubility. These results are useful for a prospective development of crystallization-based separation processes of chemical similar substances through co-crystallization.

Anticancer drug discovery from filamentous fungi

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
NH Oberlies ◽  
A Sy ◽  
TN Graf ◽  
DJ Kroll ◽  
Y Nakanishi ◽  
...  
Keyword(s):  
Drug Discovery ◽  
Filamentous Fungi ◽  
Anticancer Drug ◽  
Anticancer Drug Discovery

Development of Taxol® as an anticancer drug

Planta Medica ◽  
2015 ◽  
Vol 81 (11) ◽  
Author(s):  
DGI Kingston
Keyword(s):  
Anticancer Drug

Solubility Enhancement of Poorly Soluble Drug Simvastatin by Solid Dispersion Technique

2016 ◽  
Vol 2 (2) ◽  
pp. 91-95
Author(s):  
Neelima Rani T ◽  
Pavani A ◽  
Sobhita Rani P ◽  
Srilakshmi N
Keyword(s):  
Dissolution Rate ◽  
Drug Carrier ◽  
Solid Dispersions ◽  
Aqueous Solubility ◽  
Onset Of Action ◽  
Kneading Method ◽  
Wetting Property ◽  
Poorly Soluble ◽  
Dispersion Technique ◽  
Low Solubility

This study aims to formulate solid dispersions (SDs) of Simvastatin (SIM) to improve the aqueous solubility, dissolution rate and to facilitate faster onset of action. Simvastatin is a BCS class II drug having low solubility & therefore low oral bioavailability. In the present study, SDs of simvastatin different drug-carrier ratios were prepared by kneading method. The results showed that simvastatin solubility & dissolution rate enhanced with polymer SSG in the ratio 1:7 due to increase in wetting property or possibly may be due to change in crystallinity of the drug.

Modeling fine particles and alkali metal compound behavior in a kraft recovery boiler

TAPPI Journal ◽  
2012 ◽  
Vol 11 (7) ◽  
pp. 9-14 ◽  
Author(s):  
AINO LEPPÄNEN ◽  
ERKKI VÄLIMÄKI ◽  
ANTTI OKSANEN
Keyword(s):  
Alkali Metal ◽  
Computational Models ◽  
Fine Particles ◽  
Black Liquor ◽  
Melting Behavior ◽  
Metal Compound ◽  
Effect Of Temperature ◽  
Particle Model ◽  
Boiler Furnace ◽  
Recovery Boiler

Under certain conditions, ash in black liquor forms a locally corrosive environment in a kraft recovery boiler. The ash also might cause efficiency losses and even boiler shutdown because of plugging of the flue gas passages. The most troublesome compounds in a fuel such as black liquor are potassium and chlorine because they change the melting behavior of the ash. Fouling and corrosion of the kraft recovery boiler have been researched extensively, but few computational models have been developed to deal with the subject. This report describes a computational fluid dynamics-based method for modeling the reactions between alkali metal compounds and for the formation of fine fume particles in a kraft recovery boiler furnace. The modeling method is developed from ANSYS/FLUENT software and its Fine Particle Model extension. We used the method to examine gaseous alkali metal compound and fine fume particle distributions in a kraft recovery boiler furnace. The effect of temperature and the boiler design on these variables, for example, can be predicted with the model. We also present some preliminary results obtained with the model. When the model is developed further, it can be extended to the superheater area of the kraft recovery boiler. This will give new insight into the variables that increase or decrease fouling and corrosion

Revised aqueous solubility product constants and a simple laboratory synthesis of the Pb(II) hydroxycarbonates: Plumbonacrite and hydrocerussite

2017 ◽  
Vol 51 (4) ◽  
pp. 315-328
Author(s):  
Arturo Mendoza-Flores ◽  
Mario Villalobos ◽  
Teresa Pi-Puig ◽  
Nadia Valentina Martínez-Villegas
Keyword(s):  
Solubility Product ◽  
Aqueous Solubility ◽  
Laboratory Synthesis
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