摘要:

The Office of Science and Research (OSR) initiated a project to monitor ambient air for volatile organic compounds (VOC) at six abandoned hazardous waste sites and one sanitary landfill in New Jersey. In the past, assessment of VOC emanating from hazardous waste sites received little attention as a major source of exposure to toxic materials. The objective of the present study was to attempt to characterize the variability and impact of levels of VOC near the selected locations. The sites chosen for this study represent a cross‐section of abandoned sites in New Jersey. At each site, VOC were collected using low flow (10–15ml/min) samplers for 24 hr/day for three consecutive days. The cartridges contained Tenax‐GC and were thermally desorbed and analyzed by capillary‐column GC using FID and ECD. Mass spectrometry was conducted on all samples. The results for 26 selected VOC are reported and are compared with the large OSR data set on background VOC levels in urban areas in New Jersey.

ISSN:0360-1226    

DOI:10.1080/10934528509375237

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Mixtures of aniline/ethylene/NOxwere photoiyzed in a 22.7‐m3Teflon reaction chamber operated in a dynamic mode. Several minor products, including nitrobenzene, azobenzene, α‐nitroaniline, phenol, and benzoic acid, were identified. The production of aerosol was also observed. The product mixtures were exposed toSalmonella typhimuriumstrains TA98 and TA100 both with and without metabolic activation. Exposures of the gas mixture alone and the aerosol plus gas mixture were performed. In addition, filters of the aerosol were collected, extracted, and used in a plate incorporation procedure with these strains. The results show the gas phase products from the irradiated mixture to be relatively nonmutagenic in TA98 and TA100. This same result was found in the aerosol exposure, although the deposition into the media may have been low. However, extracts from the aerosol when directly incorporated into the medium show mutagenic activity for TA98.

ISSN:0360-1226    

DOI:10.1080/10934528509375238

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Thein vitroeffects of five widely employed pesticides (i.e., insecticides: malathion and aldicarb; herbicides: diuron, metolachlor, and glyphosate) on the occurrence of oxidative stress [i.e., increased levels of methemoglobin (METHB) amd decreased levels of induced glutathione (GSH)] in erythrocytes from female Dorset sheep, an animal model with low erythrocyte G‐6‐PD activity. The only statistically significant treatments (p 0.05) occurred with malathion and metolachlor which reduced GSH levels at the highest concentration (i.e., 100 ppm) employed by 59% and 45%, respectively.

ISSN:0360-1226    

DOI:10.1080/10934528509375239

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Clustering, multivariate and discriminant protocols have been utilized to analyze the data obtained from the analysis of aqueous sediments from some lakes surrounding a coal‐fired power plant. Metal concentrations were determined by atomic absorption methods. The large data accumulated were subjected to clustering techniques. Tree diagrams—dendrograms—and K‐means cluster were plotted from the reduced cluster data set to highlight the (dis)similarity pattern of metals among the lakes. Also presented are the correlations between the scavenging parameters—Fe, Mn, clay material and organic matter—and the metals Cd, Cu, and Zn. Furthermore, relationship between depth from surface and the metals at this initial time of study has been assessed.

ISSN:0360-1226    

DOI:10.1080/10934528509375240

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Experimental evidence has indicated that poultry waste slurries exhibit a transition from non‐Newtonian rheological behavior to Newtonian behavior with increasing degree of digestion during anaerobic fermentation for production of methane.

ISSN:0360-1226    

DOI:10.1080/10934528509375241

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

The concentration of pollutants may fluctuate enormously over the day, making it inappropriate to extrapolate 24‐hour averaged pollutant concentration to short‐term human exposures of only 1 or 2 hours. We describe the design and methodology for collecting integrated gas samples over short periods of time from which the short‐term concentrations of woodsmoke aerosol can be deduced. Our technique is particularly useful in isolating potential health effects from acute exposure to air pollutants. We demonstrate our method by applying it to acute levels of exposure to pollutants from woodburning stoves and fireplaces in a residential community.

ISSN:0360-1226    

DOI:10.1080/10934528509375242

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

A selective medium was developed for the primary isolation of opportunistic flavobacteria from potable water. A minimal‐salts maltose yeast extract agar medium (MSMY) supplemented with either kanamycin (MSMY‐K) or tobramycin (MSMY‐T) was effective in suppressing the background microflora from most sources while allowing for the growth ofFlavobacterium meningosepticumandFlavobacterium IIb. Opportunistic flavobacteria were isolated from 30% of potable well and 10% of potable distribution water samples tested using MSMY‐K in a membrane filtration technique.

ISSN:0360-1226    

DOI:10.1080/10934528509375243

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

摘要:

Weathering and Erosionby Stephen T. Trudgill, Sixth in the series, “Sources and Methods in Geography,”; edited by M. A. Morgan and D. J. Briggs. Butterworth & Co. (Publishers) Ltd., London‐Boston, 1983; 192 p., 95 illus., 40 tables, soft back. (ISBN 0–408–10635–2)

ISSN:0360-1226    

DOI:10.1080/10934528509375244

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934528509375236

出版商:Taylor & Francis Group    

年代:1985

数据来源: Taylor