森得保林间喷粉防治柳杉毛虫药效试验

采用5种不同浓度的森得保生物农药林间喷粉防治柳杉毛虫试验,结果表明：森得保：轻质碳酸钙为1：15、1：20的配比浓度,既经济又有效,林间杀虫效果分别为95．42％、91．97％,建议在生产中推广应用。     

内蒙古沙尘暴的成因、趋势及其预报

本文利用内蒙古1961～2001年的天气气候资料,对内蒙古中西部地区沙尘暴作了统计分析,阐述了沙尘暴的危害并给出了沙尘暴的基本定义。分析了引起沙尘暴的天气和气候因子的变化趋势,研究了他们对沙尘暴的影响,结果表明近40年内蒙古的沙尘暴总体呈减少趋势,但从1998年开始有所增加;沙尘暴的空间分布以阿拉善盟偏北地区为最高发区;降水、气温、大风、寒潮、北半球极涡、西太平洋副热带高压、亚洲西风环流、东亚大槽和南方涛动等天气和气候因素均对该地区沙尘暴的发生有不同程度的影响。     

聚集器式气力集尘装置几个主要设计参数的合理确定

合理确定聚集器的静压、压力平衡基准、聚集器的压力损失、设计流量等参数，对于保证集尘装置工作的可靠性和经济性都有重要意义。     

道路景观植物滞尘量研究

道路景观植物作为消除大气颗粒污染物的重要方法正受到越来越广泛的重视。本文选用绵阳市道路景观植物中具有代表性的小叶榕、月季和女贞对影响植物滞尘量的因素进行研究。结果表明:小叶榕树种的滞尘量极显著地高于月季和女贞(P<0.01);小叶榕与月季混种的滞尘量显著地高于小叶榕单独种植(P<0.05);景观植物与机动车道适当的距离和栽种密度对小叶榕的滞尘和滤尘作用有一定的影响。       

Relationship between thermal anomalies in Tibetan Plateau and summer dust storm frequency over Tarim Basin,China

The dust storm is the most important and frequent meteorological disaster over Tarim Basin,which causes huge damages on local social economics.How to predict the springtime and summertime dust storm occurrence has become a hot issue for meteorologists.This paper employed the data of dust storm frequency and 10-m wind velocity at 35 stations over Tarim Basin and the reanalysis data from the National Center for Environmental Prediction and the National Center for Atmospheric Research(NCEP/NCAR) during 1961-2007 to study the relationship between dust storm frequency(DSF) in summer over Tarim Basin and the thermal anomalies in Tibetan Plateau in May by using the statistical methods,such as Empirical Orthogonal Function(EOF),correlation and binomial moving average.The results show when negative anomalies in Tibetan Plateau and positive anomalies in its southern region are present along 30°N(the second mode of surface temperature anomalies by EOF decomposition) in May,the time coefficient(PC2) plays an important role in summer DSF variation and has a close relation with the summer DSF at both inter-annual and decadal time scales.When negative anomalies in Tibetan Plateau and positive anomalies are present in its southern region(PC2 in positive phase),there is an anomalous anticyclone in North China,which weakens the northwest wind and is not beneficial for cold air moving from high latitude to the Tarim Basin,and the circulation pattern is hard to result in dust storm weather.Furthermore,the sea level pressure(SLP) increased over Tarim Basin and the direction of SLP gradient reversed,which resulted in the 10-m wind velocity slowing down,so the DSF decreased.From above all,it can be conclude that the thermal anomalies in Tibetan Plateau in May has important effects on the summertime dust storm frequency over Tarim Basin and the PC2 can be used as a prediction factor for the summertime dust storm occurrence.     

显像管玻壳铅尘环境化学行为的研究

以显像管玻壳铅尘为对象,通过测定铅在不同深度的土壤中各种形态的含量,系统地研究了玻壳铅尘在土壤中的形态及其在土壤剖面中的迁移转化规律,为农业铅污染的防治提供了理论依据。     

Improving In-House Air Quality in Broiler Production Facilities Using an Electrostatic Space Charge System

Reduction of airborne dust in enclosed animal housing has been shown to result in corresponding reductions in airborne bacteria, ammonia, and odor. The search for strategies to reduce particulate matter and ammonia emissions from animal housing has led to considerable interest in the poultry industry for practical systems to reduce these air emissions. Technologies that have been shown to be effective for reducing airborne dust in animal areas include misting with an oil spray, water mists, extra ventilation, and electrostatic space charge systems. An electrostatic space charge system (ESCS) was designed to reduce airborne dust and ammonia emissions from a commercial broiler production house. The ESCS for this application was based on patented technology developed to reduce airborne dust and pathogens. Two commercial broiler houses with built-up litter (a control house and one outfitted with an ESCS unit) were monitored for dust and ammonia concentrations over a period of 7 flocks. Results of this study indicate the ESCS significantly reduced airborne dust by an average of 43% and reduced ammonia by an average of 13%. Power consumption of the ESCS system was less than 100 W when in operation. Commercial application of this technology within the production house has the potential to improve in-house air quality and reduce particulate emissions.     

2003和2004年春季台北大气悬浮物中的水溶性离子(英文)

IntroductionTheoccurrenceofAsianduststorms(ADS)iscommonduringthemonthsoflatewinterandspringinEastAsia.Underfavorablesynopticconditions,significantamountsoftheAsiandustmaybetransportedtoTaiwan(Chen&Chen1987).Inrecentyears,ADSoverTaiwanreceivedsubstantialattentionbecauseoftheirimpactontheairquality.Besideshigherconcentrationsofmineralelements,highlevelsofanthropogenicspeciessuchassulfateandnitratehavebeenobservedintheoutflowfromtheAsiancontinent(Clarkeetal.2001).Thus,inthiswork,theinfluen…     

Demonstration of inflammatory cell population changes in rat lungs in response to intratracheal instillation of spring wheat dust using lung enzymatic digestion and centrifugal elutriation

The inhalation of grain dust by grain workers is responsible for a large number of pulmonary pathophysiologies. These problems may be acute or chronic and may be mediated by the chronic activation of the immune system. Constant inflammatory states in the lung may eventually lead to tissue damage and respiratory deficit. This study was designed to measure the changes in the relative number of inflammatory cells in peripheral blood, bronchoalveolar spaces, and lung interstitium that occur in response to intratracheally instilled airborne spring wheat dust in rats. It was found that 6h after instillation with dust, neutrophils were present in greater numbers in the blood and bronchoalveolar spaces than in lung interstitium. After 24h, there appeared to be a larger number of neutrophils in the lung interstitium in dust-instilled animals than in saline-instilled controls. These results indicate that intratracheal instillation of grain dust initiates an acute inflammatory reaction, and that there is an initial influx of neutrophils into the air spaces of the lung followed by transit of these cells into the lung interstitium.