Reference

Absorption coefficients at carbon dioxide laser wavelengths for toluene, m-xylene, o-xylene, and p-xylene

Absorption coefficients at carbon dioxide laser wavelengths for toluene, m-xylene, o-xylene, and p-xylene. Andersson, Per; Persson, Ulf (Dep. Electr. Meas., Chalmers Univ. Technol., Goeteborg S-412 96, Swed.). Appl. Opt., 23(2), 192-3 (English) 1984. CODEN: APOPAI. ISSN: 0003-6935.Several reagents with their cas registry numbers 108-38-3 and 108-88-3 are used here. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 80 Absorption coeffs. are detd. for PhMe (I) [108-88-3], o-xylene (II) [95-47-6], m-xylene [108-38-3], and p-xylene [106-42-3]. The exptl. setup used for measuring the species in air is described. The absorption spectra for this compds. lack rotational fine structure, and the absorption coeffs. are low. Except for II, they all have their main absorption features in the 9 m band from the in-plane C-H bond. The detection limits for long-path absorption monitoring, assuming 1% absorption, would be 270 ppm/m for I, which means a min. detectable concn. of 2.7 ppm for an absorption path of 100m. For a photoacoustic detector with a detection limit of 10-7/cm, the min. detectable concn. would be 0.27 ppm, which is much lower than concns. of solvents in working environment. .

Vestibulo-ocular disturbances in rats exposed to organic solvents

Vestibulo-ocular disturbances in rats exposed to organic solvents. Tham, R.; Bunnfors, I.; Eriksson, B.; Larsby, B.; Lindgren, S.; Odkvist, L. M. (Dep. Otorhinolaryngol., Linkoping Univ., Linkoping S-581 85, Swed.).Several reagents with their cas registry numbers 60-29-7 and 127-18-4 are used here. Acta Pharmacol. Toxicol., 54(1), 58-63 (English) 1984. CODEN: APTOA6. ISSN: 0001-6683. DOCUMENT TYPE: Journal CA Section: 4 (Toxicology) The influence of different kinds of industrial solvents on the vestibular function of rats was studied by recording nystagmus, induced by accelerated rotation. The effect was related to the blood levels of the solvents. One group of solvents, including halogenated satd. hydrocarbons like dichloromethane [75-09-2], caused depression of the vestibulo-oculomotor reflex (VOR). Another group, including benzene compds. like o-xylene [95-47-6], toluene [108-88-3], styrene [100-42-5], and cumene [98-82-8] and halogenated unsatd. hydrocarbons like 1,2-trichloroethylene [79-01-6], caused an excitation of the VOR. The most striking chem. similarity between the different solvents in the last group is the occurrence of double bonds. If the animals were exposed simultaneously to solvents from both groups, the excitatory effect prevailed and was even potentiated. Apparently, solvents cause depression or excitation of the VOR by interaction with central pathways in the reticular formation and the cerebellum. .