integration of human health risk assessment

... Although risk assessment remains at a primitive level, several estimates of carcinogenic risk to VOCs have basically agreed on the VOCs found to have the highest risk: benzene, chloroform, and ... one of the most important sources of VOC exposures, due to the large number of homes with attached garages, the widespread use of them for storage of gasoline, solvents, and paints, and (often) ... Routes of Chloroform Exposure and Body Burden from Showering with Contaminated Tap Water, Risk Analysis, 10: 575–580 Jo, W.K., Weisel, C.P and Lioy, P.J (1990b) Chloroform Exposure and the Health Risk...

Ngày tải lên: 12/08/2014, 00:21

... fish, that contain it Health effects There is no evidence that moderate use of common household products that contain 1,4dichlorobenzene harms human health However, very high use of 1,4-dichlorobenzene ... forest fires Benzene is a natural part of crude oil, gasoline, and cigarette smoke Benzene is one of the major components of JP-8 fuel Industry is the main source of benzene in the environment Emissions ... nonsmokers and 0.66 ppb for smokers) The effect of benzene exposure on the general population at current levels of exposure is not known The health effects of benzene at the levels found among the Churchill...

Ngày tải lên: 14/02/2014, 03:20

... well samples PCE–TCA Chloroform–PCE Chloroform–MTBE PCE–TCE Dibromochloromethane– chloroform Chloroform–TCA TCA–TCE PCE–MTBE Bromoform– dibromochloromethane Bromoform–chloroform Public well samples ... is the first national assessment of the occurrence of a large number of VOCs with different uses, and the assessment addresses key questions about VOCs in aquifers The assessment also provides ... concentration(s) of potential human- health concern samples from both well (compounds listed by decreasing number of concentrations of types Because NAWQA’s potential concern) assessment is based...

Ngày tải lên: 14/03/2014, 19:20

... the determination of the composition or concentration of fragrance components in products 1.4 The term “Executive Officer” as used in this document means the Executive Officer of the Air Resources ... Executive Officer selects a product for analysis by Method 310 The Executive Officer will maintain sample chain of custody throughout the selection and analytical process 3.2 Initial Testing of Aerosol ... analysis of samples to determine the weight percent of total volatile material, using US EPA Reference Methods 24/24A, ASTM D 2369-01 3.3.2 Determination of sample water content For determination of...

Ngày tải lên: 14/03/2014, 20:20

... and si are the values of wind direction and wind speed of sample i The ranges of wind direction and wind speed are divided into a series of subranges having similar numbers of samples in each Then ... overfitting of c13-benzene for the case of 10 sources Neither poor fit nor over fit is acceptable So the number of sources for this analysis was chosen to be During the experiments, FIGURE Profiles of ... model can be written as X ) GFT + E (1) where X is the matrix of VOCs’ concentrations, F is the matrix of source profiles, G is the matrix of source contributions, and E is the residuals matrix Their...

Ngày tải lên: 22/03/2014, 14:20

... other types of health effects become of greater concern In view of the fact that there are few controlled human exposure studies and the results are not confirmed, and that the results of epidemiological ... irritation of mucous membranes with the question of the potential of TVOC to serve as an effects indicator in mind - TVOC REVIEW OF ANALYTICAL NIETHODS 2.1 Introduction In view of the large number of ... in studies of VOCs in indoor air typically quantify only about 50 VOCs out of the many more present The use of a combination of two GC columns of different polarity and/or the use of both an...

Ngày tải lên: 28/03/2014, 19:20

... month of March 2006 Shown to the right of each bar graph is a breakdown, for T0 and T1, respectively, of all of the species measured in terms of the sums of the mixing ratios for each compound ... month of March 2006, at 3:00 PM, local time Shown to the right of each bar graph is a breakdown, for T0, T1 and the C130, respectively, for all of the species measured in terms of the sums of the ... each respective set of G1 and C130 data The benzene/CO slope does not change whether observed in or out of the outflow estimate of the emission ratio of toluene to benzene of (Zavala, 2006; Karl...

Ngày tải lên: 28/03/2014, 20:20

... patients who underwent tumor resection because of histological evidence of NSCLC at the University of Parma's Department of Thoracic Surgery The assessments of tumour size and nodes were based on the ... COPD, all of whom were diagnosed on the basis of the GOLD guidelines [13] In brief, the entry criteria, consisted of a post-bronchodilator FEV1 of

Ngày tải lên: 12/08/2014, 18:21

Ngày tải lên: 12/04/2015, 14:24

... FOR HUMAN HEALTH TAN JING (B.Eng., Wuhan University, China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL AND BIOMOLECULAR ENGINEERING NATIONAL UNIVERSITY OF ... Toxicological effects of POPs on humans 17 2.4 POPS IN SINGAPORE 18 2.5 ANALYSIS OF POPS 22 iii Table of Contents 2.5.1 Extraction of POPs 22 2.5.2 Cleanup of extracts ... were evaluate human perinantal exposure to POPs in Singapore, with emphasis on the health risks of fetuses and infants The prevailing concentrations of POPs in adipose tissues of expectant mothers...

Ngày tải lên: 14/09/2015, 14:06

... effects of indoor-air microorganisms”, Scandinavian Journal of Work, Enrionmental & Health, vol 22, pp 5-13, 1996 M J Mendell, “Non-specific symptoms in office workers: a review and summary of the ... cause of the presence of some gases [9]; they can be used in places with high levels of electromagnetic noise, as the fiber is a dielectric material [10]; another good feature is the possibility of ... all of them, ESAm is offering the best results in terms of reproducibility, thanks to the fact that it is an iterative process [38] In order to obtain the maximum reflected power, the end of the...

Ngày tải lên: 14/03/2014, 20:20

Ngày tải lên: 28/03/2014, 20:20

... Workshop of the solvented Adhesive Page of Workshop of the Natural Adhesive Surface: 129.37 m2 Number of workers: Number of stations: - Manufacture of the Natural adhesive - Conditioning of Natural ... used: Water Workshop of the Powder Adhesive Surface: 34 m2 Number of workers: Number of stations: - Filling of the machine of conditioning of the powder adhesive - Conditioning of the powder adhesive ... Organic Workshop of the Latex Adhesive Workshop of the Vinyl Adhesive Surface: 174 m2 Number of workers: Number of stations: - Manufacture of the adhesive Latex - Conditioning of the adhesive...

Ngày tải lên: 20/06/2014, 00:20

... potential (m3/mg of waste), Mi = the mass of solid waste in the ith section of the landfill (mg), ti = the age of the ith section of the section of the landfill (years), t = the age of the landfill ... Journal of Energy and Environment (IJEE), Volume 4, Issue 1, 2013, pp.85-92 Figure Graph of frequency against range of values of age of landfill (t) Figure represents range of values of the total ... 0.0496, and 0.223 respectively Figure Graph of the frequency against the range of values of CNMOC Figure Graph of frequency against range of values of average annual acceptance rate ® ISSN 2076-2895...

Ngày tải lên: 05/09/2013, 16:11

... Potential Role of Environmental Chemical Exposures Risk assessment of ECs and EC mixtures In general, the effects of the types of ECs mentioned above have been demonstrated in rodents at levels of exposure ... increased risks of TGCT and groups of some of these compounds are also associated with small increased risks of cryptorchidism and/or hypospadias, consistent with them playing a role in the origins of ... poses a potential hazard, it does not pose a risk at normal human exposure levels However, accurate risk assessment depends on knowing the range of human exposure (especially in vulnerable groups...

Ngày tải lên: 13/02/2014, 10:20

... primarily to the capacity of the adsorbent for the adsorbate, and 1/n is a function of the strength of adsorption For fixed values of Ce and 1/n, the larger the value of K, the larger the capacity ... experimentally determined values of qmax and b often are not constant over the concentration range of interest, possibly because of the heterogeneous nature of the adsorbent surface (a homogeneous ... compounds The quantity of activated carbon or other adsorbent required to remove a certain amount of a compound of interest ADSORPTION OF ORGANIC COMPOUNDS 13.7 from a mixture of adsorbable compounds...

Ngày tải lên: 14/02/2014, 03:20

... because of a lack of direct measurements of BVOC fluxes (see the Discussion) For this reason, the quantitative estimates should be viewed as an indication of the magnitude and spatial distributions of ... regional level, by calculating the fraction of the land surface belonging to each of the different classes of land-use and forest type Both parts of this procedure are included in the results ... Appendix) Uncertainty in the FIA data reflects a number of potential sources of error including the measurement of individual tree sizes and the estimates of forest area from aerial photography, but the...

Ngày tải lên: 14/02/2014, 08:20

... the parent chain Name the compound in order of: number of carbon atom-alkyl group attached(number of carbon atom-alkyl group attached- etc ) name of parent compound If there are several different ... chemical and physical properties of another class of compounds A Halogen Derivatives of Hydrocarbons Functional Group: - X (F, Cl, Br, I) General Formula: R-X Naming of Halides Halogens attached ... variations of compounds which have the same number of carbon and hydrogen atoms, but a different arrangement are known as isomers Some isomers are shown in the diagram below Rules for Naming of Branched...

Ngày tải lên: 14/02/2014, 08:20

... method may not address all of the safety problems associated with its 1154 use It is the responsibility of the user of this test method to establish appropriate safety and health practices and determine ... concentration 3.2 Calibration precision means the degree of agreement between measurements of the same known value, expressed as the relative percentage of the average difference between the meter readings ... practices and determine the applicability of regulatory limitations prior to performing this test method 5.2 Hazardous Pollutants Several of the compounds, leaks of which may be determined by this method,...

Ngày tải lên: 14/02/2014, 08:20

... the induction of neoplastic processes Effects of natural and artificial UV radiation on human skin Variety of skin types There is a considerable range of susceptibility of the human skin to the ... quality of life, employment and health of 802 randomly selected adults, showed that in 2002, 38% of adults had ever used indoor tanning facilities (Lazovich et al., 2005) The prevalence of use of ... evaluation of an association of ever use of indoor tanning facilities and risk for melanoma Reference Exposure comparison Adam et al (1981) Ever use of sunlamps vs never Relative risk (95% CI)...

Ngày tải lên: 14/02/2014, 21:20