A range of hydrogels were prepared by solution polymerization of methacrylic acid, poly(ethyleneglycol) methyl ether methacrylate (M.W. 475 g/mol) and poly(ethyleneglycol) dimethacrylate (as the cross-linking, M.W. 550 or 875 g/mol) in various proportions. The effects of methacrylic acid/ poly(ethyleneglycol) methyl ether methacylate concentration ratios as well as cross-linking concentration i...

The effective two-photon absorption in the hybrid material comprising quantum dots (QDs) a poly(methyl methacrylate) (PMMA) matrix and gold nanorods (GNRs) was increased 12-fold due to nonlinear energy transfer from GNR plasmons QD excitons.

A recent report in this journal [Vairapandi, M. and Duker, N.J. (1993) Nucleic Acids Res. 21, 5323-5327) presented evidence of an activity in HeLa cell nuclear extracts that released radiolabeled material from a poly(dG.dC) polymer that had been methylated and simultaneously labeled on cytosine residues by incubation with a CpG-specific DNA methylase and [methyl-3H]S-adenosylmethionine. Based o...

Graft polymerizations of vinyl acetate onto granular corn starch were initiated by cobalt-60 irradiation of starch-monomer-water mixtures. and ungrafted poly(vinyl acetate) was separated from the graft copolymer by benzene extraction. Conversions of monomer to polymer were quantitative at a radiation dose of 1.0 IvIrad. However, over half of the polymer was present as ungrafted poly(vinyl aceta...

In this study, synthesis of unsaturated Poly(2-Butene Maleate) polyester by condensation polymerization and preparation cross-linked graft copolymer with methyl methacrylate are presented. For purpose, polyesters were synthesized in four different time periods (12h, 24h, 36h, 48h) the presence hydroquinone using 1,4-Butanediol-2-ene maleic anhydride. Then, obtained was purified on alumina colum...