This work investigates the potentialities of thermal analysis (TA) coupled with mass spectrometry (MS) technique by studying decomposition calcium oxalate monohydrate (CaC2O4·H2O). The aim this is twofold: to demonstrate, at first, efficacy coupling gravimetric (TG)-MS experimental approach check presence intermediate reactions beyond conventional three-step decomposition: dehydration, decarbon...

Catalase is well-known as an antioxidant dismutating H2O2 to O2 and H2O. However, catalases evolved when metabolism was largely sulfur-based, long before O2 and reactive oxygen species (ROS) became abundant, suggesting catalase metabolizes reactive sulfide species (RSS). Here we examine catalase metabolism of H2Sn, the sulfur analog of H2O2, hydrogen sulfide (H2S) and other sulfur-bearing molec...

Isolated chloroplasts which are incapable of causing a net reduction of COZ accompanied by 02 evolution can still cause a Hill reaction, that is, a photoreduction of an added oxidant with concomitant evolution of a stoichiometric amount of OZ. The occurrence of the Hill reaction has long been regarded as part of the evidence for the conclusion that the action of light in photosynthesis leads fi...

That the adenyl lipoate (AMP-lipoate) is the product of activation of lipoate was demonstrated by using the apopyruvate dehydrogenase system of Streptococcus jaecalis as well as Escherichiacoli. Pyruvate dismutation assay was used to demonstrate the activation of apoenzyme with either a mixture of ATP and lipoate or adenyl lipoate alone. That an active intermediate was formed was demonstrated b...