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Desorption of pyrene and phenanthrene, from two charcoals and humic acid preloaded charcoals werestudied. Desorption occurred obviously in two fractions, with rapid and slow desorption rate constantra...
Problem statement: The fungus, Metarhizium anisopliae (Metschnikoff) Sorokin produces some cyclic peptide toxins, destruxins, which exhibit a variety of insecticidal actions. Citrus leafminer, Phylloc...
Problem statement: The aim of this study was examine the representative particle size of noncohesive sediment samples collected from different storm sewer inlets in residential catchments within Kuwai...
In aragonitic coral skeletons, the Na/Ca molar ratio is clearly higher than any other minor- or trace-element/Ca molar ratio (i.e., Na/Ca > Sr/Ca ≥ S/Ca ≥ F/Ca ≈ Mg/Ca). However, little attention has ...
It was concluded that the AITC oil showed promise findings and may be a good alternative to old fumigant “phosphine”. The others were found efficient on the spray application bioassays but the mixture...
High-energy radiations, such as alpha and beta particles or gamma radiation, ionize air molecules into pairs of positive ions and free electrons. The diurnal and seasonal variations of these air ions...
The Wide-range Particle Spectrometer (WPS™) is a recently introduced commercial instrument with the unique capability to measure size distributions of aerosols from 0.01 to 10 μm in diameter. T...
PM1 (particles having aerodynamic diameter < 1.0 μm) concentrations were measured at a sampling site inside the Indian Institute of Technology (IIT) Kanpur campus for 11 months from July, 2008–May, 2...
A growing number of studies indicate the significance of short-term exposures to airborne particulate matter, such as those occurring in a vehicle cabin. In this study, PM10, PM2.5, PM1 concentration...
This study presents the first investigation of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/F) emission from (six 2-stroke and six 4-stroke engine) motorcycles using chassi...
Problem statement: The definition and the economic viability of the best development strategy of a hydrocarbon reservoir mainly depend on the quantity and type of fluids and on the well productivity. ...
采用富集因子法评价了浙江慈溪地区不同成土时间表层土壤元素Hg的污染程度。结果表明,该地区成土过程中土壤重金属元素Hg污染程度一直增加,其中:成土前200年元素Hg污染程度缓慢增加,随后急剧上升,近1 000年时污染程度最高;表层土壤元素Hg质量是自然积累和人为污染叠加的结果,近1 000年表层土壤元素Hg人为污染量最多,约占Hg其总质量的83%。
将落叶松用一系列磷-胺-醛树脂型阻燃剂进行阻燃处理,所得阻燃落叶松采用热分析、锥形量热研究其热解行为,用氧指数、剩炭率、热释放速率、总热释放量等参数表征它的阻燃性能,并用Broido方程计算落叶松的动力学参数. 结果发现,阻燃落叶松氧指数、剩炭率增加,热释放速率、总热释放量降低,表明经阻燃剂处理的落叶松燃烧性降低. 落叶松经阻燃剂处理后,热解活化能降低很多,表明阻燃剂对落叶松热解具有催化作用,其主...
以陶粒作为生物过滤床的填料净化含乙苯废气. 通过对乙苯降解过程的分析,在稳态条件下建立了生物膜内Dx微元上的物质平衡方程. 并通过适当假设条件,将模型进行简化求解,得出了零级反应方程及一级反应方程. 用实验数据对方程进行了拟合,结果表明,生物过滤塔对乙苯的生物降解过程为零级反应扩散限制过程. 以葡萄球菌(Staphylococcus)为乙苯降解菌,停留时间大于28.3 s、气体流量小于1 m3/h...
在内径200 mm的固定床气化炉装置上进行了以高温空气/蒸汽作为气化剂的煤高温空气气化实验,考察了空气预热温度、气化温度、空气/煤比和蒸汽/煤比等工艺参数对煤气化指标的影响. 结果表明,在其他条件不变的情况下,空气预热温度由500℃提高到800℃时,煤气热值提高32.5%. 气化温度越高对气化过程越有利,但在固态排渣条件下,气化温度的提高受煤灰熔点的限制. 空气/煤比和蒸汽/煤比对气化指标的影响本...

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