The new platelet antiaggregant Triflusal or 2-acetoxy-4-trifluoromethylbenzoic acid presents a structural analogy to acetylsalicylic acid (ASA). Alkaline hydrolysis of triflusal was studied in the presence and absence of cationic micelles of N-cetyl-N-ethyl-N,N-dimethylammonium bromide (CDEABr) at different KOH concentrations and different temperatures (25, 30, and 37 degrees C) using a spectro...

Bromine is ubiquitously present in animals as ionic bromide (Br(-)) yet has no known essential function. Herein, we demonstrate that Br(-) is a required cofactor for peroxidasin-catalyzed formation of sulfilimine crosslinks, a posttranslational modification essential for tissue development and architecture found within the collagen IV scaffold of basement membranes (BMs). Bromide, converted to ...

A theoretical study of vibrational spectral diffusion in aqueous NaBr solutions is presented by means of ab initio molecular dynamics simulations and time series analysis. The OD stretch frequencies of deuterated water hydrogen bonded to the bromide ions are found to be higher than those in the bulk which implies a somewhat weaker Br–water hydrogen bonds than those between water molecules. The ...

KINSEY AND PALM (1955) have described the kinetics of penetration of two ions, sodium and thiocyanate, into the aqueous humour, and have concluded that there is a fundamental difference in their modes of penetration; the thiocyanate ion, contrary to an original claim (Kinsey and Grant, 1942), penetrating by " diffusion ", whilst sodium is said to penetrate by " secretion". An inspection of thei...

A new technique [mass-analyzed threshold ionization (MATI)-photodissociation yield spectroscopy] to probe bound excited states of a cation was developed, which measures photodissociation yield of the cation generated by mass-analyzed threshold ionization. A vibrational spectrum of vinyl bromide cation in the (~)B state was obtained using this technique. Optical resolution in the low vibrational...

Chemical modification of a single tryptophan residue in antithrombin III with dimethyl(2-hydroxy-5-nitrobenzyl)sulfonium bromide blocks heparin binding and the heparin-enhanced inhibition of thrombin without altering the heparin-independent rate of thrombin inhibition (Blackburn, M. N., and Sibley, C. C. (1980) J. Biol. Chem. 255, 824-826). The labeled protein was reduced and carboxymethylated ...

In the title compound, [CdBr(2)(C(12)H(19)N(3))], the Cd(II) atom is coordinated by the three N atoms of the (1R,2R)-N-(pyridin-2-ylmeth-yl)cyclo-hexane-1,2-diamine ligand and a bromide ion in the basal plane, and by a second bromide in the apical position. The coordination environment can be described as distorted square pyramidal. The coordination of the enanti-o-pure ligand to the metal atom...

A cationic gemini surfactant, dodecanediyl-1,12-bis(dodecyldiethylammonium bromide) (C12C12C12(Et)), in aqueous solutions with varying NaBr concentration was studied by dynamic light scattering (DLS). As a comparison, its single-chained counterpart, dodecyl triethylammonium bromide (DTEAB), was also investigated under the same conditions. Similar to the case of a polyelectrolyte, C12C12C12(Et) ...