Transition metal (TM) single atomic catalysts (MSAC-N-C) derived from doped zeolite imidazolate frameworks (ZIF-8) are considered attractive oxygen reduction reaction (ORR) for fuel cells and metal-air batteries due to their advantages of high specific surface area, more active catalytic sites, adjustable pore size, coordination topology features. This review provides an updated overview the la...

Oxidative DNA damage is mediated by reactive oxygen species and is supposed to play an important role in various diseases including cancer. The endogenous amount of reactive oxygen species may be enhanced by the exposure to genotoxic metals. A cross-sectional study was conducted from 1993 to 1994 in an urban population in Germany to investigate the association between metal exposure and oxidati...

The absolute line intensities of CO2 were retrieved from Fourier-transform spectra recorded in the region 4200–8500 cm . The accuracy of the line intensity determination is estimated to be 5% or better for most lines and about 10% for weak ones. The vibrational transition dipole moments squared and Herman–Wallis coefficients have been determined. The global fittings of the observed line intensi...

UNLABELLED Urea and NaCl are elevated in the renal inner medulla. We now find that a high concentration of urea or NaCl increases reactive oxygen species (ROS) in mouse renal inner medullary (mIMCD3) cells in culture. Previously, high NaCl, but not high urea, was found to cause DNA double-strand breaks. We now tested whether high urea or NaCl causes oxidative damage to DNA or cellular proteins....

1. The effects of thermal acclimation on whole blood oxygen affinity were examined in the antarctic fish Pagothenia borchgrevinki. 2. 4-5 °C-acclimated fish had a P50 value of 26-7 mrnHg at pH 8*1, compared to 20-7 mmHg for — l-5°C-acclimated fish. The apparent heat of oxygenation, AH = — 26-7kJmol~, is comparable to values for temperate species. 3. Warm-acclimation was followed by an increased...

The reactivity of a trisubstituted alkene surfactant (8-methylnon-7-ene-1 sulfonate, 1) to airborne singlet oxygen in a solution containing E. coli was examined. Surfactant 1 was prepared by a Strecker-type reaction of 9-bromo-2-methylnon-2-ene with sodium sulfite. Submicellar concentrations of 1 were used that reacted with singlet oxygen by an "ene" reaction to yield two hydroperoxides (7-hydr...

7,8-Dihydro-8-oxoguanine (8oxoG) is a major mutagenic base lesion formed when reactive oxygen species react with guanine in DNA. The human 8oxoG DNA glycosylase (hOgg1) recognizes and initiates repair of 8oxoG. hOgg1 is acknowledged as a bifunctional DNA glycosylase catalyzing removal of the damaged base followed by cleavage of the backbone of the intermediate abasic DNA (AP lyase/β-elimination...