Enzymatic degradation of plant biomass has attracted intensive research interest for the production of economically viable biofuels. Here we present an overview of the recent findings on biocatalysts implicated in the oxidative cleavage of cellulose, including polysaccharide monooxygenases (PMOs or LPMOs which stands for lytic PMOs), cellobiose dehydrogenases (CDHs) and members of carbohydrate-...

Melatonin exerts beneficial effects on early liver injury by modulating hepatic oxidative stress. In order to understand the protective effect of melatonin against burn-induced hepatic injury we investigated the expression of 4-hydroxynonenal (4-HNE), a main product of lipid peroxidation and mediator of oxidative injury, the inducible heme-oxygenase-1 (HO-1), an antioxidant enzyme, and the anti...

The process of thermal-oxidative degradation polymer materials has been studied on the example polyethylene in presence quinones and / or nitroxyl radicals. synergistic effect positive action a mixture stabilisers from number radicals destructive established. It shown that rate significantly slowed down when an equimolecular 4-acetylamino-2,2,6,6-tetramethylhexahydropyridine-1-oxyl 2,6-di-tert-...

Abstract Patients with cardiac arrhythmias are currently treated conventional transvenous rhythm implants. Complications frequently associated intracardiac implanted leads primary insulated by silicone and polyurethane. However, experiences show that polyurethanes in particular susceptible to various degradation mechanisms including hydrolysis, environmental stress cracking (ESC) metal ion indu...

Combined kinetic analysis has been applied for the first time to the thermal degradation of polymeric materials. The combined kinetic analysis allows the determination of the kinetic parameter from the simultaneous analysis of a set of experimental curves recorded under any thermal schedule. Besides, the method does not make any assumption about the kinetic model or activation energy and allows...

The design of efficient Organic Rankine Cycle (ORC) units for the usage of industrial waste heat at high temperatures requires direct contact evaporators without intermediate thermal oil circuits. Therefore, the thermal stability of high-temperature working fluids gains importance. In this study, the thermal degradation of hexamethyldisiloxane (MM) is investigated in an electrically heated tube...

Abstract In the ethanolamine (MEA) solution, during absorption and desorption of CO 2 undesired compounds are produced as a result degradation an amine. Degradation not only reduces capacity solution but also leads to many operational problems. Furthermore, measuring products is great importance in terms environmental issues. For determination MEA products, mainly chromatographic techniques use...