Three additional major aromatics are shown in Table 7:1,2,4-trimethylbenzene, 1-methyl 3-ethylbenzene, and m-xylene
and o-xylene did not cause OHC loss, according to experiments with rats conducted by Gagnaire and Langlais .
Inui, The effect of Y-zeolite acidity on m-xylene
transformation reactions, J.
Xylene exists as a clear liquid and can be found in three different isomeric forms: orthoxylene (o-xylene), metaxylene (m-xylene
), and paraxylene (p-xylene).
0.0006 0.108 0.0001 0.0002 Max 0.0190 0.498 0.0400 0.0454 MAC 1.6000 100.000 200.0000 -- Tested substance concentration [mg/[m.sup.3]] Statistical parameters m-xylene
o-xylene acetone Mean 0.0092 0.0030 0.1028 SE 0.0048 0.0011 0.0170 Min.
Ceresana expects global demand for xylenes to increase considerably in the future: Aggregated consumption of p-, o- and m-xylene
will rise by about 4.5% p.a.
of 100% concentration at 139oC in 5 minutes and in cyclohexane of 100% concentration at 156oC in 5 minutes whereas.
Less voluminous reaction products will diffuse faster to the outside of the pore, so that pxylene diffuses 1000 times faster than o- and m-xylene
, and thus pxylene in the product might surpass the thermodynamic equilibrium values significantly .
The carbon source, anhydrous m-xylene
(purity [greater than or equal to] 99%), and the catalyst, ferrocene (purity: 98%) were obtained from Sigma Aldrich, St.
Theoretical values of ultrasonic velocities in the mixtures: anisaldehyde + o-xylene, + m-xylene
and + p-xylene at different mole fractions of anisaldehyde for different temperatures were calculated using the following theories and relations:
1712) evaluated mixtures of benzene, toluene, ethylbenzene, and m-xylene
(BTEX) using three joint models of toxicokinetics and metabolism [i.e., physiologically based pharmacokinetic (PBPK) modeling, systems biology markup language modeling of metabolic networks, and detailed (non-Michaelian) description of enzymatic reactions] and calibrated the models using Markov chain Monte Carlo simulations and single-substance exposure data.
The reporting limit was 0.025 ppm for benzene, toluene ethylbenzene, m-xylene
and 0.050 ppm for o- and p-xylene and naphthalene.