Abstract The present research investigates the hydrolytic degradation of ternary blends composed poly(ethylene- co -vinylacetate) (EVA), poly(lactic acid) (PLA), and poly(styrene- -methyl methacrylate)(poly(S- -MMA) (SMMA) (EPS) at a temperature 37 °C pH 7.4, monitoring changes in phosphate buffer solution for 6 months. In addition, mechanical behavior morphology were evaluated from comparison ...

An efficient two-step enzymatic process for production of (R)- and (S)-ethyl-3-hydroxybutyrate (HEB), two important chiral intermediates for the pharmaceutical market, was developed and scaled-up to a multikilogram scale. Both enantiomers were obtained at 99% chemical purity and over 96% enantiomeric excess, with a total process yield of 73%. The first reaction involved a solvent-free acetylati...

The probiotic industry faces the challenge of retention of probiotic culture viability as numbers of these cells within their products inevitably decrease over time. In order to retain probiotic viability levels above the therapeutic minimum over the duration of the product's shelf life, various methods have been employed, among which encapsulation has received much interest. In line with explo...

– We show that the density and temperature dependences of the α-relaxation time of several glassforming polymers can be described through a single scaling variable X = e(ρ)/T , where e(ρ) is well fitted by a power law ρ, x being a species-specific parameter. This implies that “fragility” is an intrinsic, density-independent property of a glassformer characterizing its super-Arrhenius slowing do...

polymer application for the improvement and modification of the bitumen used in roads surfaces has expanded in recent decades. the roads engineers and constructors, therefore, have used the modified bitumen in asphalts helping in this way to increase roads and pavements service life and improving the durability of the roads and asphalts. the bitumen used in asphalt mixture constitutes only a lo...

1. The formation of acetoacetate, beta-hydroxybutyrate and glucose was measured in the isolated perfused rat liver after addition of fatty acids. 2. The rates of ketone-body formation from ten fatty acids were approximately equal and independent of chain length (90-132mumol/h per g), with the exception of pentanoate, which reacted at one-third of this rate. The [beta-hydroxybutyrate]/[acetoacet...