نتایج جستجو برای: solvent evaporation method

تعداد نتایج: 1688659  

Journal: :Engineering proceedings 2021

Nanoparticles were obtained by nanoprecipitation and emulsion solvent evaporation (ESE) method. In the ESE method, size of particles depended on type concentration surfactant (in water phase) polymer organic phase). The best results with ionic surfactants, however, use such compounds may accelerate degradation process polymers. ratio (methylene chloride) to non-solvent (hexane) has a significan...

2001
Tze-Wen Chung Yi-You Huang

We investigated the effects of the rate of solvent removal by varying ambient pressure at a fixed temperature on the morphology, particle sizes, drug encapsulation efficiency and releases pattern of lidocaine loaded poly-L-lactatide (PLLA) and poly-D,L-lactatide (PDLLA) microspheres, prepared with O/W emulsion–solvent evaporation process. Prepared in the fast rate of solvent evaporation (FRSE) ...

Journal: :research in pharmaceutical sciences 0
m jelvehgari m maghsoodi h nemati

the objective of the present investigation was to design a sustained release floating microcapsules of theophylline using two polymers of different permeability characteristics; eudragit rl 100 (eu rl) and cellulose acetate butyrate (cab) using the oil-in-oil emulsion solvent evaporation method. polymers were used separately and in combination to prepare different microcapsules. the effect of d...

2017
Shaohua Jiang Gaigai Duan Ute Kuhn Michaela Mörl Volker Altstädt Alexander L. Yarin Andreas Greiner

Ultralight cellular sponges offer a unique set of properties. We show here that solvent uptake by these sponges results in new gel-like materials, which we term spongy gels. The appearance of the spongy gels is very similar to classic organogels. Usually, organogels are formed by a bottom-up process. In contrast, the spongy gels are formed by a top-down approach that offers numerous advantages ...

2012
Eman S. Zarie Viktor Kaidas Dawit Gedamu Yogendra K. Mishra Rainer Adelung Franz H. Furkert Regina Scherließ Hartwig Steckel Birte Groessner-Schreiber

Nanostructuring of drug delivery systems offers many promising applications like precise control of dissolution and release kinetics, enhanced activities, flexibility in terms of surface coatings, integration into implants, designing the appropriate scaffolds or even integrating into microelectronic chips etc. for different desired applications. In general such kind of structuring is difficult ...

2012
M. K. Modasiya V. M. Patel

Curcumin is coming from the Curcuma longa which gives golden color and have the biological importance. As per the survey it is water insoluble, the poor solubility and wettability of curcumin leads to poor dissolution and hence shows poor bioavailability. The present study is aimed at increasing solubility of drug using solid dispersion technique. The solid binary systems were prepared using di...

2013
MASAE IWAI TADASHI OGAWA HIDEKI HATTORI KEI ZAITSU AKIRA ISHII OSAMU SUZUKI HIROSHI SENO

A simple and rapid method for determination of nicotine and cotinine levels in urine was developed using samples prepared by micro-extraction by packed sorbent (MEPS) and subjected to gas chromatography-mass spectrometry (GC-MS) analysis. This method provided good reproducibility, as well as good linearity of calibration curves in the range of 1-100 and 50-1000 ng/mL for quality control samples...

M. Aghaie S. Moradian

In this study, the ion association phenomenon in the saturated solution of KCl in the mixed solvent(methanol+water) was studied. The solubility of this compound in the mixed solvent (methanol+water by value percent of methanol = 60%), and in the presence of various molarities of NaNO3 wasdetermined by the solvent evaporation method at 25.0°C. The results enable us to estimate the valueof thermo...

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