BACKGROUND During long-term intravenous infusions, sulfite in sulfite-containing propofol emulsions can cause the peroxidation of lipid and dimerization of propofol. This study evaluated the role of lipid in sulfite-dependent propofol dimerization by determining the effects of individual fatty acids in soybean oil emulsion and peroxidized lipids in a model system. METHODS Individual fatty aci...

DDTC, SOD, Sulfite Oxidation 50 U SOD in 1 ml or 10 m M DDTC do not much change sulfite oxidation due to the free radicals procuding system xanthin-xanthin oxidase. Sulfite oxidation due to the activity of this free radicals producing system proceeds probably as the univalent oxidation o f sulfite. The role o f SOD in SO, resistance mechanism in plants and the role o f DDTC as S 0 2 oxidation e...

The chemical reaction networks (CRNs), which led to the transition on early Earth from geochemistry biochemistry remain unknown. We show that simplest substances—bicarbonate, sulfite/sulfate, and ammonium—were converted peptides in one geological setting Sammox (sulfite/sulfate reduction coupled anaerobic ammonium oxidation)-driven CRNs under mild hydrothermal conditions. Peptides comprise 15 p...

Background The mechanisms of sulfite intolerance are unknown. It has been suggested that, in some cases, it could be due to a partial sulfite-oxidase deficiency. In these patients, this enzyme is unable to metabolize adequately an overload of ingested or inhaled exogenous sulfite, triggering a bronchospasm. Cyanocobalamin is able to catalyze the extracellular oxidation of sulfites, preventing s...

After SO(2) has entered leaves of spinach (Spinacia oleracea) through open stomata and been hydrated in the aqueous phase of cell walls, the sulfite formed can be oxidized to sulfate by an apoplastic peroxidase that is normally involved in phenol oxidation. The oxidation of sulfite is competitive with the oxidation of phenolics. During sulfite oxidation, the peroxidase is inhibited. In the abse...

Sulfite has been identified as an essential metabolite by means of growth studies using a chemically-defined, protein-free medium for culture of human peripheral lymphocytes. Sulfite reduced the amount of cysteine required for optimum growth by at least four-fold. In some subjects, sulfite stimulated growth even in the presence of optimal amounts of cysteine indicating that lymphocytes of some ...

A wide range of microorganisms was tested to determine their sensitivity to low concentrations of bisulfite-sulfite and nitrite, solubility products of SO2 and NO2, respectively. Photosynthesis by blue-green algae (cyanobacteria) was more strongly inhibited by 0.1 mM bisulfite-sulfite and 1 mM nitrite at pH 6.0 than photosynthesis by eucaryotic algae and respiration of bacteria, fungi, and prot...

A simple 4-hydroxynaphthalimide-derived colorimetric and ratiometric fluorescent probe (1) containing a receptor of levulinate moiety was designed and synthesized to monitor sulfite. Probe 1 could quantificationally detect sulfite by a ratiometric fluorescence spectroscopy method with high selectivity and sensitivity. Specially, probe 1 exhibited a 100 nm red-shifted absorption spectrum along w...

The utilization of organosulfonates as carbon sources by aerobic or nitrate-reducing bacteria usually involves a measurable, uncharacterized sulfite dehydrogenase. This is tacitly assumed to be sulfite : ferricytochrome-c oxidoreductase [EC 1.8.2.1], despite negligible interaction with (eukaryotic) cytochrome c: the enzyme is assayed at high specific activity with ferricyanide as electron accep...

One is used to considering sulfite oxidation as part of a lithotrophic process (e.g. SorAB or Sox system), much of which involves neutral or ionic inorganic sulfur species on the outer surface of the cytoplasmic membrane. In contrast, the processes referred to in this chapter involve organic compounds, which (1) include a highly stable sulfonate substituent (C−SO 3 ), (2) are involved in the or...