was associated with increased disease risk, based on two studies [summary RR = 1.45 (95% CI: 1.08, 1.95)] (Table 3).
Fourier Transform Infrared Spectroscopy Gas Analyzer (FTIR) was incorporated with the transient engine dynamometer test facility for measuring unregulated emission pollutants such as carbon monoxide (CO), carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), nitrous oxide (N2O), water (H2O), ammonia (NH3), sulfur dioxide (SO2), formaldehyde (HCHO), acetaldehyde (CH3CHO), formic acid (HCOOH), acetic acid (CH3COOH), methanol (CH3OH), ethanol (C2H5OH), methane (CH4), Acetylene (C2H2), ethylene (C2H4), ethane (C2H6), propene (C3H6), propane (C3H8), 1,3-Butadiene
(C4H6), iso-butene (C4H8), benzene (C6H6) toluene (C7H8) etc.
Quantitative human health risk assessment for 1,3-butadiene
based upon ovarian effects in rodents.
Following the definition of air toxics relevant for mobile sources, this new version TREM-HAP (Transport Emission Model for Hazardous Air Pollutants) is prepared to calculate the emissions of benzene, 1,3-butadiene
, formaldehyde, acetaldehyde, acrolein, naphthalene and also particulate matter with aerodynamic diameter less than or equal to 2.5 [micro]m (PM2.5).
The following reaction variables were evaluated: DEAC/Nd ratio, reaction temperature, catalyst concentration, and 1,3-butadiene
Henry's constants and infinite dilution activity coefficients of propane, propene, butane, isobutene, 1-butene, isobutane, trans-2-butene and 1,3-butadiene
in 1-propanol at T = (260 to 340) K.
The announcement, he added, means an earlier crackdown on four common pollutants: lead; benzene; 1,3-butadiene
; and carbon monoxide.
One such genotoxic chemical with variable damaging effects in genetically diverse individuals is 1,3-butadiene
is an industrial chemical that is primarily used in the production of synthetic rubbers and polymers (White 2007); it is a ubiquitous environmental pollutant, is present in both automobile exhaust and cigarette smoke, and is classified as carcinogenic to humans by the World Health Organization/International Association for Research on Cancer (WHO/IARC) (Baan et al.
Chevron Phillips, for example, said that it expected its Cedar Bayou chemical plant to exceed permitted limits for several hazardous pollutants, such as 1,3-butadiene
, benzene and ethylene, during shutdown procedures.
(1998) reports the identification and quantification of 1,3-butadiene
in petrol and evaporative emissions from Australian light-duty passenger vehicles.
The synthesis of TPDB was pursued by examining the polymerization of 1,3-butadiene
using cyclohexane solutions of trioctyl aluminum [Al[([C.sub.8][H.sub.17]).sub.3]], n-butyl lithium (n-([C.sub.4] [H.sub.9])Li), and barium 2-ethyI-hexoxide [(RO).sub.2] Ba.