Manufacturing micro/nanoscale devices is a challenge that has many solutions, all with their own caveats depending on the desired finished product. Electron beam lithography (EBL) is one of these preferred solutions, however, EBL is expensive and can be inconsistent when pushing the limits of resolution without proper control over the environment. Our alternative method of EBL omits the develop...

Both the oxidized and reduced forms of Hipip (high-potential iron--sulphur protein) are reduced (approx. 30% yields) by eaq.- in a single-stage process, rate constants 1.7 x 10(10) and 1.8 x 10(10) M-1 . s-1 respectively, at 25 degrees C, pH 7.0 (5 mM-phosphate). Super-reduced Hipip, which is formed in the latter case, has a spectrum which closely resembles that of reduced ferredoxin, i.e. Fe4S...

Pulse radiolysis was applied to study the reactivity of *OH radicals with procarbazine (PC), a cytostatic agent widely used in radiation- and chemotherapy. An overall rate constant of k(*OH+PC) = 3.7 x 10(9) l.mol(-1).s(-1) was determined. The thereby formed transients had a strong absorption at 350 nm, epsilon350 = 4.46 x 10(3) l.mol(-1).cm(-1), and a weak absorption band around 530 nm. Comput...

The pulse radiolysis method has been used to generate and study a series of fivecarbocations, consisting of phenylcarbenium ions and cyclopropylphenylcarbenium ions, in chlorocarbon solvents. Rate constants for the reactions of these substituted carbenium ions with various nucleophiles such as halide ions, alkyl amines, amonia and water, have been determined. The observed reactivity trends (or,...

p-Carotene (pro-vitamin A) is a lipid-soluble antioxidant capable of quenching singlet oxygen and scavenging free-radical species [ 1-31, Epidemiological studies have established a correlation between p-carotene dietary supplementation with a reduced risk of cancer and heart disease thus providing a basis for clinical investigation [4, 51. The antioxidant properties of pcarotene, perhaps in com...

This review aims at describing the beneficial properties of melatonin related to its antioxidant effects. Oxidative stress, i.e., an imbalance between the production of reactive oxygen species and antioxidant defences, is involved in several pathological conditions such as cardiovascular or neurological disease, and in aging. Therefore, research for antioxidants has developed. However, classica...