The level of monomer styrene migrated from polystyrene containers (PS) was measured in different dairy products at various fat contents, storage periods and temperatures. The dairy products were packed in PS containers and divided into groups according to storage period and temperature. The samples were included whole milk (3.6% fat) kept at 100 °C for two hours (group 1), yogurt (3% fat), sour...

The improvement and modeling of a process for the supply of the volatile aromatic hydrocarbon, styrene, to a fermentor for increased biomass production of the medium chain length polyhydroxyalkanoate (mcl-PHA) accumulating bacterium Pseudomonas putida CA-3 was investigated. Fed-batch experiments were undertaken using different methods to provide the styrene. Initial experiments where styrene wa...

Thin films of styrene copolymers containing fluorescent molecular rotors were demonstrated to be strongly sensitive to volatile organic compounds (VOCs). Styrene copolymers of 2-[4-vinyl(1,1'-biphenyl)-4'-yl]-cyanovinyljulolidine (JCBF) were prepared with different P(STY-co-JCBF)(m) compositions (m% = 0.10-1.00) and molecular weights of about 12,000 g/mol. Methanol solutions of JCBF were not em...

OBJECTIVE The aim of this study was to evaluate the expression of a panel of genes involved in toxicology in response to styrene exposure at levels below the occupational standard setting. METHODS Workers in a fiber glass boat industry were evaluated for a panel of stress- and toxicity-related genes and associated with biochemical parameters related to hepatic injury. Urinary styrene metaboli...

A 1.5-kb region immediately downstream of the styABCD operon involved in styrene degradation in Pseudomonas putida CA-3 has been cloned. Sequence analysis revealed a 1,296-bp open reading frame, designated styE, and BLAST P database comparisons of the deduced StyE amino acid sequence revealed 33 to 98% identity with several membrane-associated ATPase-dependent kinase proteins involved in the ac...

Butadiene-styrene copolymer (SBR) is an elastomer composed of 75% butadiene and 25% styrene widely used in the automotive industry tire production. This can be produced from two polymerization processes: emulsion or solution polymerization. paper presents mechanical behavior a polymer reinforced sand compared to pure sand. Direct shear tests were performed on specimens with addition modified bu...

Free radical polymerization of (+)-2,5-bis[4'-((S)-2-methylbutyloxy)phenyl]styrene yields a chiral polymer with memory of optical activity after the initial stereogenic center in the side group of the monomer is chemically removed.

Styrene and polystyrene are two important organic compounds with a wide range of applications. The key difference between styrene and polystyrene is that it is the polymerization of styrene that forms polystyrene, a synthetic thermoplastic elastomer. Styrene is chemically called vinyl benzene and is among one of the oldest known vinyl compounds in the world. This aromaticcompound was first isol...

Optimization of industrial styrene reactor design for two objectives using the non-dominated sorting genetic algorithm (NSGA) is studied. Both adiabatic and steam-injected reactors are considered. The two objectives are maximization of styrene production and styrene selectivity. The study shows that styrene reactor design can be optimized easily and reliably for two objectives by NSGA. It provi...