(245)Research upon Free Radical. II. Reaction of Paraldehyde on Ethyl Maleate.

Ocular reaction to timolol maleate.

A patient prescribed timolol maleate for the control of hypertension developed dryness of the eyes. The symptoms improved on withdrawal of the drug. Vigilance for such adverse reactions must be observed in the use of any beta-adrenoreceptor blocking agent.

Temperature-dependent free radical reaction in water

Temperature-dependent free radical reactions were investigated using nitroxyl radicals as redox probes. Reactions of two types of nitroxyl radicals, TEMPOL (4-hydroxyl-2,2,6,6-tetramethylpiperidine-N-oxyl) and carbamoyl-PROXYL (3-carbamoyl-2,2,5,5-tetramethylpyrrolidine-N-oxyl), were tested in this paper. Heating a solution containing a nitroxyl radical and a reduced form of glutathione (GSH) c...

Synthesis of Polyvinyltetrazole by Combination of Free Radical Polymerization and Click Chemistry for Adsorption of Pb (II) in Aqueous Solution

Polyvinyltetrazole (PVT) is produced from acrylonitrile (AN) monomer by using free-radicalpolymerization and Click Chemistry methods. The resulting polymer with a broad range of tetrazolegroup contents was conveniently synthesized through [3+ 2] azide-nitrile cycloaddition reaction ofnitrile-containing polymer with sodium azide in DMF. The prepared PVT was characterized by13CN...

Intramuscular Paraldehyde

Electron capture dissociation initiates a free radical reaction cascade.

For small cyclic peptides, one electron capture by the [M + 2H](2+) ion generates numerous fragments corresponding to amino acid losses, side-chain losses, and losses of some low molecular weight species such as H(2)O, CH(3)(*), C(3)H(6), and (*)CONH(2). As predicted, the side-chain cleavages are amplified relative to linear peptides of similar size, but the amino acid losses were unexpected be...