نتایج جستجو برای: divinylbenzene

تعداد نتایج: 562  

Journal: :Membranes and membrane technologies 2022

Abstract Synthesis of proton-conducting materials based on track-etched membranes from polyvinylidene fluoride and sulfonated cross-linked polystyrene is described. The synthesis has been carried out by filling the pores original or gamma-irradiated membrane copolymerization styrene/divinylbenzene followed sulfonation with chlorosulfonic acid. resulting have studied scanning electron microscopy...

Journal: :Journal of chromatography. A 2007
E Beceiro-González E Concha-Graña A Guimaraes C Gonçalves S Muniategui-Lorenzo M F Alpendurada

A solid-phase microextraction (SPME) method for the simultaneous determination of a large number of pesticides (46) with a wide range of polarities and chemical structures (organochlorine, organophosphorous, triazines, pyrethroids and others) in water samples by GC-MS has been developed. Three different fibres and parameters that influence the extraction and desorption efficiency were studied. ...

Journal: :The Journal of biological chemistry 1992
G S Retzinger L J Chandler B C Cook

Heparin, in Langmuirian fashion, binds stoichiometrically with high affinity, Kd approximately 100 nM, to both fibrinogen and fibrin adsorbed as monomolecular films to lecithin-coated, microscopic, polystyrene-divinylbenzene beads. Complex formation inhibits aggregation of fibrin-coated beads, and it also results in dissociation of preformed aggregates of fibrin-coated beads. These phenomena ar...

Journal: :Journal of The European Ceramic Society 2021

This study focuses on the chemistry, thermal stability, and electrical conductivity of low/intermediate pyrolysis temperature (700?900 °C) polysiloxane derived ceramics. These ceramics were modified with additional carbon from divinylbenzene (DVB) added to precursor. Their properties investigated for potential uses in micro-electrical mechanical systems (MEMS) anodes lithium batteries. The micr...

Journal: :Macromolecular Chemistry and Physics 2021

Front Cover: In article number 2100022 by Tugrul Cem Bicak, a new method, namely “Type-II photoinitiated precipitation polymerisation”, is described for the synthesis and functionalisation of highly crosslinked microspheres in one step. Using this click functionality introduced to particles at room temperature UV irradiation. A pyrene group then attached onto CuAAC reaction confirm presence acc...

Journal: :Journal of agricultural and food chemistry 2004
Dawn M Chapman John H Thorngate Mark A Matthews Jean-Xavier Guinard Susan E Ebeler

A rapid and automated solid phase microextraction (SPME) stable isotope dilution gas chromatography/mass spectrometry (GC-MS) method for 2-methoxy-3-isobutylpyrazine (MIBP) quantification in red wine was developed. Wines with 30% (w/v) NaCl and 2-methoxy-(2)H(3)-3-isobutylpyrazine internal standard were sampled with a 2 cm divinylbenzene/carboxen/poly(dimethylsiloxane) SPME fiber for 30 min at ...

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