Trang 1 từ 24 các kết quả
In this paper, we report the use of femtosecond time-resolved degenerate four-wave mixing rotationally resolved spectroscopy to obtain very accurate structural information on the symmetric top cyclohexane. Apart from highlighting the versatility of this method in determining accurate structures of
Paramagnetic spin-lattice relaxation (SLR) in radical cations (RCs) of the cycloalkane series in liquid solution was studied and analyzed from the point of view of the correlation between the relaxation rate and the structure of the adiabatic potential energy surface (PES) of the RCs. SLR rates in
We combine the technique of femtosecond degenerate four-wave mixing (fs-DFWM) with a high repetition-rate pulsed supersonic jet source to obtain the rotational coherence spectrum (RCS) of cold cyclohexane (C(6)H(12)) with high signal/noise ratio. In the jet expansion, the near-parallel flow pattern
We report on the rotational diffusion and vibrational population relaxation dynamics of the polycyclic aromatic hydrocarbon (PAH) perylene in a series of cyclohexane/n-butanol binary solvent systems. The molecular scale heterogeneity of this binary system is seen in both types of data. The
A 13-week subchronic toxicity study of 1,1-bis(t-butylperoxy)3,3,5-trimethyl cyclohexane (TMCH) was performed in male and female B6C3F1 mice by feeding a CRF-1 powder diet containing 0, 0.5, 1.0, 2.0 and 4.0% TMCH, to determine the maximum tolerable dose (MTD) for subsequent carcinogenicity study.
The ASEP/MD (averaged solvent electrostatic potential from molecular dynamics) method was employed in studying the environment effects (solvent and counterion) on the absorption spectrum of a model of the 11-cis-retinal protonated Schiff base. Experimental studies of the absorption spectra of the
Deterioration of lung function in patients with cystic fibrosis (CF) is closely associated with chronic pulmonary infection with mucoid Pseudomonas aeruginosa. The mucoid exopolysaccharide (MEP) from P. aeruginosa has been shown to induce opsonic antibodies in mice that are protective against this
Chickens treated by paintbrushing with glue distillate (used in shoe industries), hydrocarbon mixture and TOCP in hexane, developed paralysis (4/5); in these, we have demonstrated a diffuse degeneration of the myelinic sheath of the peripheral and central neurites. Besides TOCP, cyclohexane (because
Rats were intermittently exposed (9 to 10 h/d, 5 to 6 d/week) to controlled concentrations of single analytical grad solvents in ambient air. After periods ranging from 7 to 30 weeks the animals were perfused with glutaraldehyde and samples of nerves were processed for light microscopy of sections
The possibility of immunological suppression of spermatogenesis while normal libido is maintained by exogenous androgen supplementation was tested in male rats. Neither short- nor long-term treatment with androgen (testosterone-17-trans-4-N-butyl-cyclohexane carboxylate) alone influenced fertility.
In the past, porous materials made of an aromatic polyurethane (PU) were successfully used to meniscal reconstruction in dogs. Since aromatic PUs yield very toxic fragments upon degradation, a linear PU was synthesized by curing a poly(epsilon-caprolactone) and 1,4-trans-cyclohexane diisocyanate
The linear photophysical, excited state absorption (ESA), superfluorescence, and two-photon absorption (2PA) properties of 4,4'-(1E,1'E)-2,2'-(7,7'(1E,1'E)2,2'(4,4'-sulfonylbis(4,1-phenylene))bis(ethane-2,1-diyl)bis(9,9-didecy-9H-fluorene7,2-diyl))bis(ethane-2,1-diyl)bis(N,N-diphenylaniline) (1)
BACKGROUND
Positron emission tomography (PET) with (18)F-fluorodeoxyglucose (FDG) shows widespread hypometabolism even in temporal lobe epilepsy (TLE) patients with mesial temporal foci. (18)F-trans-4-fluoro-N-2-[4-(2-methoxyphenyl) piperazin-1-yl]ethyl-N-(2-pyridyl)cyclohexane carboxamide
Gene and drug therapies are being developed to alleviate vision loss in patients with Stargardt's disease and age-related macular degeneration (AMD). To evaluate the therapeutic effects of these treatments, organic solvents are routinely used to extract and quantify bisretinoid lipofuscin
Benzene ranks 16th in production volume for chemicals produced in the United States, with approximately 9.9 billion pounds being produced in 1984, 9.1 billion pounds in 1983, and 7.8 billion pounds in 1982. This simplest aromatic chemical in used in the synthesis of styrene (polystyrene plastics and