Ultrafast polarization and wavelength selective IR pump-probe spectroscopy is used to measure the inertial and long time orientational dynamics of pi-hydrogen bonding complexes. Inertial orientational relaxation is sensitive to the angular potential associated with the hydrogen bond. The complexes studied are composed of phenol-OD (hydroxyl hydrogen replaced by deuterium) and various pi-base so...

Centrilobular hepatocyte contribution to doxorubicin (DOX) metabolism and myelotoxicity was probed with bromobenzene (BRB), a known centrilobular hepatotoxin. New Zealand White rabbits were given DOX, 3 mg/kg i.v. After 4 weeks, the rabbits were pretreated i. p. with 2.6 ml/kg 40% solution of BRB in corn oil followed 72 h later with a 3-mg/kg dose of DOX. Pharmacokinetics of DOX after BRB pretr...

A home-made inexpensive passive diffusion bag (PDB) sampler, prepared by filling deionized water in low-density polyethylene (LDPE) tubes, was evaluated for volatile organic compounds (VOC) sampling in groundwater at industrial contamination sites. Impacts of environmentally relevant conditions on the sampling equilibration time and partitioning of VOCs between the sampler and the water sample ...

The kidney is the target of numerous xenobiotic toxicants, including environmental chemicals. Anatomical, physiological, and biochemical features of the kidney make it particularly sensitive to many environmental compounds. Factors contributing to the sensitivity of the kidney include: large blood flow, the presence of a variety of xenobiotic transporters and metabolizing enzymes, and concentra...

Reactions have been observed between excited ions of carbon disulfide and carbon disulfide, water, iodine and ethylene. The ions CS3\ C,S,+, C2S3\ H2OS+, CSI+, SI+, C2H : iS+ and C2H4S+ are formed in these reactions. An additional contribution to the C2S2+ ion results from reaction of CS+ with CS2 • The reaction of I2+ with CS2 leads to the ion CS2I+. Reactions of excited molecular ions have al...

Both excimers and exciplexes have attracted the attention of molecular physicists and photochemists over the last decade. Owing to the use of laser photolysis, measurements of short-lived photocurrents, and pulse spectrofluorimetry, it became possible to satisfactorily explain photophysical processes occurring in molecular systems [1]. Excimers and exciplexes provide important steps of many pho...

Fifteen sodium salts of mono and di-substituted N-bromobenzene-sulphonamides of the configuration, 4-X-C6H4SO2NaNBr (where X = H; CH3; C2H5; F; Cl; Br; or NO2) and i-X,jYC6H3SO2NaNBr (where i-X, j-Y = 2,3-(CH3)2; 2,4-(CH3)2; 2,5-(CH3)2; 2-CH3,4-Cl; 2-CH3,5-Cl; 3-CH3,4-Cl; 2,4-Cl2 or 3,4-Cl2) are prepared and characterised by measuring their infrared spectra in the solid state and NMR spectra in...