The oxidation of alcohols, n-propanol, 2-methoxy ethanol and 2-ethoxy by cerium (IV) in nitric acid leads to the formation corresponding aldehydes. reaction is first order with respect Ce(IV). A Michaelis-Menten type kinetics observed alcohols. retarded initial [Ce(IV)] increase concentration oxidant. exhibits participation 2 mole 1 It has been concluded that Ce(IV)-dimer participate process fr...

In previous studies in this laboratory, highly purified liver microsomal cytochrome P-450 was shown to catalyze the hydroperoxide-dependent hydroxylation of a variety of substrates in the absence of NADPH, NADPH-cytochrome P-450 reductase, and molecular oxygen, and evidence was obtained that the oxygen atom in the product was derived from the peroxide. To determine whether the cytochrome funct...

Astrocytes are important for protecting neurons in the central nervous system. It has been reported that some antioxidants could protect astrocytes from ischemia/reperfusion-induced dysfunction. Cinnamtannin B-1 is a naturally occurring A-type proanthocyanidin that exhibits anti-oxidant properties. In this study, we investigated the effects of cinnamtannin B-1 on spinal cord astrocytes. Astrocy...

All classic, non-surgical anticancer approaches like chemotherapy, radiotherapy or photodynamic therapy kill cancer cells by inducing severe oxidative stress. Even tough chemo- and radiotherapy are still a gold standard in cancer treatment, the identification of non-toxic compounds that enhance their selectivity, would allow for lowering their doses, reduce side effects and risk of second cance...

Many herbs have been used as therapeutics in Korean traditional medicine. In view of their clinical indications, anti-oxidant activity may contribute to their pharmacological effects. However, anti-oxidant information on these plants has not been available. In this study, seventy herbs which have been used in Korean traditional medicine were selected and screened for anti-oxidant activity using...

Photochemical reactions involving a variety of photosensitizers contribute to the abiotic transformation of pesticides in prairie pothole lakes (PPLs). Despite the fact that triplet excited state dissolved organic matter (DOM) enhances phototransformation of pesticides by acting as a photosensitizer, it may also decrease the overall phototransformation rate through various mechanisms. In this s...