What's the difference between sulphine and sulphite?

Sulphine


Definition:

  • (n.) Any one of a series of basic compounds which consist essentially of sulphur united with hydrocarbon radicals. In general they are oily or crystalline deliquescent substances having a peculiar odor; as, trimethyl sulphine, (CH3)3S.OH. Cf. Sulphonium.

Example Sentences:

  • (1) In contrast, in the majority of neurones, responses to glutamate, aspartate, cysteate and cysteine sulphinate demonstrated a conventional voltage relation, were associated with a decrease in membrane resistance, evoked no slow spikes, were insensitive to extracellular Mg2+ concentrations between 1 and near 0 mM and could be evoked with small currents of amino acids when the electrophoretic pipette was greater than 100 micron from the cell soma.
  • (2) The binding constants, quentum yield and temperature dependence of the fluorescence of ionic (1-anilinonaphtalin-8-sulphinate) and neutral (N-phenyl-1-naphtylamine) probes were studied on the molecules of bovine serum albumine with the change of pH and solution ionic strength.
  • (3) Endogenous amino acids known to activate NMDA receptors (L-glutamate, L-aspartate, L-cysteine sulphinate and quinolinate) as well as exogenous NMDA agonists such as ibotenate and trans-2,3-piperidine dicarboxylate (trans-PDA) all produced similar responses.
  • (4) The progress of the reaction is described and the activities of related sulphinic acids were determined.
  • (5) An oxidative pathway for cysteine catabolism in H. diminuta was shown by the presence of cysteine dioxygenase and cysteine sulphinate transaminase.
  • (6) The recombinant enzyme and the authentic AspATSs are indistinguishable: in fact, they have the same molecular weight, estimated by means of SDS-PAGE and gel filtration, the same Km values for 2-oxo-glutarate and cysteine sulphinate and the same UV-visible spectra.
  • (7) Depletion of GSH by NDPO2 is accompanied by the formation of its disulphide, sulphinate, sulphonate, sulphoxide and other products.
  • (8) The effects of the sulphur containing amino acids, homocysteic acid, homocysteine sulphinic acid, cysteic acid and cysteine sulphinic acid on the release of [3H]-acetylcholine ([3H]-ACh) from the cholinergic amacrine cells of the rabbit retina were examined.
  • (9) The transport kinetics of the excitatory sulphur-containing amino acid (SAA) transmitter candidates, L-cysteine sulphinate (L-CSA), L-cysteate (L-CA), L-homocysteine sulphinate (L-HCSA), and L-homocysteate (L-HCA), together with their plasma membrane carrier specificity, was studied in cerebrocortical synaptosome fractions by a sensitive high performance liquid chromatographic assay.
  • (10) Methanesulphenic acid is proposed to be the group displaced by GSH from methyl sulphoxides forming methyl mercaptan, methyl glutathionyl disulphide and methane-sulphinic acid in vitro.
  • (11) Methane sulphinic acid was quantified by use of a simple colorimetric assay and used to determine the amounts of HO.
  • (12) Except for homocysteine sulphinic acid these actions occurred at concentrations that did not affect the erg b-wave amplitude, indicating a site of action at the inner retina.
  • (13) These results suggest that aspartate, glycine, homocysteic acid, and cysteine sulphinic acid play a role in synaptic transmission in the Schaffer collateral-commissural fibres, and that cysteine sulphinic acid and homocysteic acid may be released specifically by high-frequency stimulation.
  • (14) In general, inhibition: (i) was markedly stereospecific in favor of the L-enantiomers (except for cysteine sulphinate) and (ii) was found to decrease with increasing chain length.
  • (15) Also by automated ion-exchange chromatography seleninic derivatives are well separated from the analogous sulphinic compounds, while selenonic compounds are eluted together with the corresponding sulphonic compounds.
  • (16) Of the four extraction media examined, TCA in combination with ether extraction was shown to be the most potent oxidative treatment and resulted in 23% oxidation of original cysteine or homocysteine to sulphinic and sulphonic acids.
  • (17) Four minutes of continuous 50 Hz stimulation produced a tetrodotoxin-sensitive release of aspartate and glycine in the second minute of stimulation, as well as a tetrodotoxin-sensitive release of cysteine sulphinic acid, during stimulation and of homocysteic acid, following stimulation.
  • (18) The neuroactive sulphur-containing amino acids L-cysteate (CA), L-cysteine sulphinate (CSA), L-homocysteine sulphinate (HSA), S-sulpho-L-cysteine (SC) and L-homocysteate (HCA) evoked the release of previously accumulated D-[3H]aspartate from rat brain cerebrocortical and cerebellar synaptosome fractions in a manner that was wholly Ca2+-independent.
  • (19) Metabolically formed nitrosoarenes react with sulphydryl groups of haemoglobin and, after intramolecular rearrangement, yield sulphinic acid amides.
  • (20) 3) In contrast the cysteic and cysteine sulphinate decarboxylase activities decrease with age in kidney, lung and spleen.

Sulphite


Definition:

  • (n.) A salt of sulphurous acid.

Example Sentences:

  • (1) The reactivity of the three disulphide bridges of insulin towards sodium sulphite was studied by amperometric titration of the liberated thiol groups.
  • (2) Sulphite bleached the flavin of cellobiose oxidase, but gave no reaction with the 31 kDa haem protein, suggesting an absence of flavin.
  • (3) The oxidation of vitamin B1 to thiochrome is stopped by the addition of sodium sulphite.
  • (4) Xanthine oxidase deficiency was demonstrated in a jejunal biopsy specimen, whereas the excretion of sulphur containing substances was considered to be characteristic of sulphite oxidase deficiency.
  • (5) The theoretical potential of a solution of 1 M S2O2-4 and 2 M (bi)sulphite at pH 7 was calculated to be -0.386V.
  • (6) The passive net transport of Li+ and Na+ across the human red cell membrane was accelerated by the divalent anions carbonate, sulphite, oxalate, phosphite and malonate.
  • (7) Examination of the plasma showed that S-sulphonates were present in both pre- and post-hepatic blood, whereas free sulphite was detectable in the portal blood only.
  • (8) In rat liver most of the sulphite oxidase was present in the nuclear fraction and only a small portion in the microsomes.
  • (9) Different bacterial cell fractions of Thiobacillus neapolitanus were examined in order to localize the active sites for thiosulphate and sulphite oxidation.
  • (10) Mercaptoethanol is effective in both restoring enzyme activity and removing bound sulphite from protein.
  • (11) The classification scheme used is based upon the fact that determination of the sulphite content of a food is influenced more by the treatment and cleanup of the test solution than by the final determinative step.
  • (12) It is probably this multiplicity of biochemical and genetic mechanisms that accounts for the frequency with which the production of sulphite is observed in wild strains in nature.
  • (13) The equilibria were established either by treating the oxidized electron carriers with dithionite, or by treating flavodoxin hydroquinone or methyl viologen semiquinone with (bi)sulphite.
  • (14) The low-molecular-weight acceptor is tightly bound to enzyme B of the yeast system and, apparently, accepts the sulpho group of adenosine 3'-phosphate 5'-sulphatophosphate and is released as bound sulphite only in the presence of enzymically or chemically reduced fraction C. It is proposed that the low-molecular-weight acceptor is a carrier peptide which, after release of the reduced sulphur, becomes re-oxidized and returns to enzyme B.
  • (15) No difference between resistant and sensitive strains with respect to glyceraldehyde-3-phosphate dehydrogenase sensitivity to sulphite, or to intracellular glutathione content, were revealed.
  • (16) Sulphite was more effective than the four used thiols and enhanced the activity against serum albumin up to 3.2 times and against keratin up to 2.9 times.
  • (17) The glycolysis of lactoperoxidasesensitive streptococci suspended in glucose solution was not inhibited by sulphite, cyanate, cyanide or the ;235 compound' but was inhibited by sulphur dicyanide.
  • (18) A new colorimetric method for the determination of sulphite based on its reaction with Ellman's reagent, 5,5'-dithiobis(2-nitrobenzoic acid) is described and compared for sensitivity with the p-rosaniline-HCHO method.
  • (19) Satisfactory recoveries were obtained only with mA agar (Rippey & Cabelli) and dextrin-fuchsin-sulphite agar (Schubert), but neither was sufficiently selective.
  • (20) It is suggested that the resistance of these mutants to azide is due to an increased activity of NADPH-sulphite reductase.

Words possibly related to "sulphine"

Words possibly related to "sulphite"