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161.
Receptor modeling for source apportionment of polycyclic aromatic hydrocarbons in urban atmosphere 总被引:1,自引:0,他引:1
Singh KP Malik A Kumar R Saxena P Sinha S 《Environmental monitoring and assessment》2008,136(1-3):183-196
This study reports source apportionment of polycyclic aromatic hydrocarbons (PAHs) in particulate depositions on vegetation
foliages near highway in the urban environment of Lucknow city (India) using the principal components analysis/absolute principal
components scores (PCA/APCS) receptor modeling approach. The multivariate method enables identification of major PAHs sources
along with their quantitative contributions with respect to individual PAH. The PCA identified three major sources of PAHs
viz. combustion, vehicular emissions, and diesel based activities. The PCA/APCS receptor modeling approach revealed that the
combustion sources (natural gas, wood, coal/coke, biomass) contributed 19–97% of various PAHs, vehicular emissions 0–70%,
diesel based sources 0–81% and other miscellaneous sources 0–20% of different PAHs. The contributions of major pyrolytic and
petrogenic sources to the total PAHs were 56 and 42%, respectively. Further, the combustion related sources contribute major
fraction of the carcinogenic PAHs in the study area. High correlation coefficient (R
2 > 0.75 for most PAHs) between the measured and predicted concentrations of PAHs suggests for the applicability of the PCA/APCS
receptor modeling approach for estimation of source contribution to the PAHs in particulates. 相似文献
162.
Microbial populations and enzyme activities in soil in situ under transgenic corn expressing cry proteins from Bacillus thuringiensis 总被引:3,自引:0,他引:3
Transgenic Bt crops produce insecticidal Cry proteins that are released to soil in plant residues, root exudates, and pollen and that may affect soil microorganisms. As a continuation of studies in the laboratory and a plant-growth room, a field study was conducted at the Rosemount Experiment Station of the University of Minnesota. Three Bt corn varieties that express the Cry1Ab protein, which is toxic to the European corn borer (Ostrinia nubilalis Hübner), and one Bt corn variety that expresses the Cry3Bb1 protein, which is toxic to the corn rootworm complex (Diabrotica spp.), and their near-isogenic non-Bt varieties were evaluated for their effects on microbial diversity by classical dilution plating and molecular (polymerase chain reaction-denaturing gradient gel electrophoresis) techniques and for the activities of some enzymes (arylsulfatases, acid and alkaline phosphatases, dehydrogenases, and proteases) involved in the degradation of plant biomass. After 4 consecutive years of corn cultivation (2003-2006), there were, in general, no consistent statistically significant differences in the numbers of different groups of microorganisms, the activities of the enzymes, and the pH between soils planted with Bt and non-Bt corn. Numbers and types of microorganisms and enzyme activities differed with season and with the varieties of corn, but these differences were not related to the presence of the Cry proteins in soil. The Cry1Ab protein of Bt corn (events Bt11 and MON810) was detected in most soils during the 4 yr, whereas the Cry3Bb1 protein was not detected in soils of Bt corn (event MON863) expressing the cry3Bb1 gene. 相似文献
163.
Journal of Material Cycles and Waste Management - The amount of ceramic waste being generated is increasing day by day, and ceramic waste management is one of the most challenging issues for many... 相似文献
164.
Naveenkumar Rasaiah Ravichandran Manickam Mohanavel Vinayagam Karthick Alagar Aswin Lawrence Sundar Raj Leo Priyanka Swaminathan Shanmugasundaram Harini Kumar Sundramurthy Kiran Kumar Shanmugavelan Pradeep 《Environmental science and pollution research international》2022,29(7):9491-9532
Environmental Science and Pollution Research - The energy storage application plays a vital role in the utilization of the solar energy technologies. There are various types of the energy storage... 相似文献
165.
166.
Tripathi Deep Kumar Rakesh Mehta Pradeep Kumar 《Environmental science and pollution research international》2022,29(36):54167-54180
Environmental Science and Pollution Research - In this experimental study on self-compacting concrete (SCC), the Manufactured sand (M-sand) and Fly ash (FA) were utilised for partial replacement of... 相似文献
167.
Rana Sahil Saxena Mohit Raj Maurya Rakesh Kumar 《Environmental science and pollution research international》2022,29(11):15432-15489
Environmental Science and Pollution Research - Particulate matter (PM) emitted from compression ignition (CI) engines (diesel engines) has a detrimental effect on human health and the environment.... 相似文献
168.
Saxena Rajat Gupta Trilok Sharma Ravi K. Siddique Salman 《Journal of Material Cycles and Waste Management》2022,24(5):1842-1858
Journal of Material Cycles and Waste Management - This research investigation has mainly focused on the development of cementless concrete, i.e., geopolymer concrete, along with the reutilization... 相似文献
169.
Saxena Abhishek Norton Brian Goel Varun Singh Desh Bandhu 《Environmental science and pollution research international》2022,29(39):58537-58560
Environmental Science and Pollution Research - The successful use of solar energy for cooking requires the systems adopted not only to have technical attributes that conveniently address specific... 相似文献
170.
Pradeep Govind Shaijumon C. S. Rajkumar R. Pradeep Jayadev 《Environment, Development and Sustainability》2022,24(8):9929-9962
Environment, Development and Sustainability - India has the largest dairy industry in the world and accounts for a significant share of the global emission of livestock methane ( $$\hbox... 相似文献