نتایج جستجو برای: polyurethane dispersions

تعداد نتایج: 12849  

The present study investigates the possibility of using poloxamers as solubility and dissolution rate enhancing agents of poorly water soluble bioactive constituent patchouli alcohol (PA) that can be used for the preparation of immediate release pellets formulation. Two commercially available grades poloxamer 188 (P 188) and poloxamer 407 (P 407) were selected, and solid dispersions (SDs) conta...

2012
Teuku Rihayat

Polyurethanes (PURs) are very versatile polymeric materials with a wide range of physical and chemical properties. PURs have desirable properties such as high abrasion resistance, tear strength, shock absorption, flexibility and elasticity. Although they have relatively poor thermal stability, this can be improved by using treated clay. Polyurethane/clay nanocomposites have been synthesized fro...

Journal: :The American journal of surgical pathology 2005
William E Katzin José A Centeno Lu-Jean Feng Maureen Kiley Florabel G Mullick

There are only a few published reports describing the pathology of regional lymph nodes from patients with silicone breast implants. Systematic analytical chemical verification of foreign material has not previously been reported. In this study, biopsies of regional lymph nodes from 96 patients with breast implants were studied using conventional histology as well as laser-Raman microprobe spec...

Journal: :Journal of Vinyl & Additive Technology 2023

This study provides an overview of the rheological properties aqueous polyurethanes (WPU), as main component, or a thickening additive in formulations. Waterborne (WPU) have been proposed environmentally friendly alternative to conventional solvent-based solutions variety industrial applications such coatings, adhesives, inks. In all these fields, control became important prerogative determine ...

2003
Ryoichi Yamamoto Yasuya Nakayama

A new method is presented for mesoscopic simulations of particle dispersions in liquid crystal solvents. It allows efficient first-principle simulations of the dispersions involving many particles with many-body interactions mediated by the solvents. Demonstrations have been performed for the aggregation of colloid dispersions in two-dimensional nematic and smectic-C* solvents neglecting hydrod...

Journal: :iranian journal of pharmaceutical sciences 0
veerendra s. rajpurohit rajendra institute of technology and sciences, hisar road, sirsa-125055, india pankaj rakha rajendra institute of technology and sciences, hisar road, sirsa-125055, india surender goyal rajendra institute of technology and sciences, hisar road, sirsa-125055, india harish durejab department of pharmaceutical sciences, m. d. university, rohtak- 124001, india gitika arorac ncrd’s sterling institute of pharmacy, navi mumbai- 400706, india manju nagpal school of pharmaceutical sciences, chitkara university, solan-174103, india

in order to enhance in vitro dissolution and content uniformity of poorly soluble drug glimepiride by preparing solid dispersions using modified solvent fusion method, solid dispersions of drug were prepared by modified fusion solvent method using peg 6000 and pvp k25 (as carrier). eight batches (f1-f8) were prepared by factorial design (23) by taking three factors i.e. the concentration of: dr...

2013
N. Burham S. M. Abdel Azeem M. F. El-Shahat

N. Burham; S.M.Abdel-Azeem; M. F. El-Shahat, Separation and determination of trace amounts of zinc, lead, cadmium and mercury in tap and qaroun lake water using polyurethane foam functionalized with 4-hydroxytoluene and 4-hydroxyacetophenone,Analytica Chimica Acta 579 (2006) 193–201. Abstract : N. Burham; S.M.Abdel-Azeem; M. F. El-Shahat, Determination of lead and cadmium in tap water and apple...

Journal: :modares journal of medical sciences: pathobiology 2014
sharafaldin al-musawi hosein naderi-manesh zuhair mohammad hassan hamid yeganeh safura nikzad

objective: in order to improve the water solubility and bioavailability of curcumin in cancer therapy, we prepared and tested a novel waterborne cationic polyurethane (pu) as a nano-carrier for curcumin loading (cu-pu). we studied the effect of this prepared nano-drug on melanoma (f10b16) and fibroblasts cells (l929). methods: morphology, size and cell internalization ability of the prepared n...

2011

This technical tip describes the use of a novel binder system based upon sulfopolyester chemistry which eliminates the deficiencies of current binder systems for joinery applications providing enhanced characteristics. Eastek polymer dispersions Eastek polymer dispersions are aqueous dispersions of sulfopolyester polymers based upon monomer building blocks, acids, and 5-(sodiosulpho) isophthali...

2018
Poovizhi Ponnammal Parijat Kanaujia Yin Yani Wai Kiong Ng Reginald B H Tan

In order to improve the aqueous solubility and dissolution of Tacrolimus (TAC), amorphous solid dispersions of TAC were prepared by hot melt extrusion with three hydrophilic polymers, Polyvinylpyrrolidone vinyl acetate (PVP VA64), Soluplus® and Hydroxypropyl Cellulose (HPC), at a drug loading of 10% w/w. Molecular modeling was used to determine the miscibility of the drug with the carrier polym...

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