In this article a method is described to prepare composite colloidal nanoparticles, consisting of a magnetic core (carbonyl iron) and a biodegradable polymeric shell [poly(butylcyanoacrylate) or PBCA]. The method is based on the so-called anionic polymerization procedure, often used in the synthesis of poly(alkylcyanoacrylate) nanospheres designed for drug delivery. Interest of this investigati...

UNLABELLED BACKGROUND A new method is developed to quantify molar equivalents of N-hydroxysuccinimide (NHS) esters of derivatives of monomethoxyl poly-(ethylene glycol) (mPEG) in their preparations with NHS acetate ester as the reference. RESULTS NHS ester of succinic monoester or carbonate of mPEG of 5,000 Da was synthesized and reacted with excessive ethanolamine in dimethylformamide at ...

Biodegradable polymers are a promising sustainable alternative to conventional petroleum-based and have attracted recent extensive research interest due their potential environmental friendliness sustainability. Among them, aliphatic polyesters polycarbonates the most extensively studied ones. The metal-catalyzed ring-opening polymerization (ROP) of cyclic esters copolymerization (ROCOP) epoxid...

The minor base 3-(3-amino-3-carboxypropyl)uridine (acp3U) in Escherichia coli tRNAPhe was acylated with the N-hydroxysuccinimide esters of acetic, phenoxy-acetic, and naphthoxyacetic acid, as well as the ester of 5-dimethylaminonaphthalene-1-sulfonyl (dansyl)-glycine. The derivatives of tRNAPhe formed were all capable of accepting phenylalanine. There were only minor effects on the kinetic para...

Phthalates pose adverse health effects due to their propensity to leach and the most common, di(2-ethylhexyl) phthalate (DEHP) and di-n-octyl phthalate (DOP), are petroleum-based. Conversely, di-esters, succinates are biobased (produced from fermentation of biomass), biodegradable, and therefore potential sustainable replacements for phthalates. A series of succinates, di-octyl succinate (DOS),...

poly-(alkylcyanoacrylate) ester particles have been used for the preparation of different formulations ranging from ophthalmic delivery systems to cancer chemotherapy carriers in clinic. the aim of this study was to prepare and characterize poly-(methyl ethyl cyanoacrylate) (pmeca) particles containing 5-aminosalicylic acid (5-asa). pmeca particles were prepared using the inverse emulsification...

175.210 Acrylate ester copolymer coating. 175.230 Hot-melt strippable food coatings. 175.250 Paraffin (synthetic). 175.260 Partial phosphoric acid esters of polyester resins. 175.270 Poly(vinyl fluoride) resins. 175.300 Resinous and polymeric coatings. 175.320 Resinous and polymeric coatings for polyolefin films. 175.350 Vinyl acetate/crotonic acid copolymer. 175.360 Vinylidene chloride copolym...

A new sidechain-based statistical anthracene-containing poly(arylene-ethynylene)- alt -poly(p-phenylene-vinylene) (P2 ) bearing 2-ethylhexyloxy and decyloxy side chains was synthesized to study the effect of elongating sidechain length from octyloxy (as in P1 P2 on photovoltaic performance. The polymer prepared using Horner-Wadsworth-Emmons olefination reaction two dialdehydes with bisphosphona...

Two different polymer systems have been studied in regards to their potential for functionalization to introduce new characteristics to the polymer. The first polymer system is a poly(arylene ether) with a truly pendant sulfone group from the monomer 3,5-difluorodiphenylsulfone. The work entails incorporating a bromine moiety onto the monomer for the versatile ability to bring in functional gro...

Microalgae oil serves as a feedstock for a biorefinery approach to mid-chain (di-)carboxylic acid esters, currently only accessible via demanding synthetic routes. Via the butenolysis of monoand poly-unsaturated fatty acids, short-chain unsaturated fatty acid methyl esters and monoand di-enes were produced in a high selectivity. These olefins were further processed into value added linear mid-c...