贵阳市西郊PM10污染特征及其与主要气象因素的关系探讨

对贵阳市西郊一贵州大学蔡家关校区的PM10进行了系统采样,分析了PM10的污染水平及在时间上的污染特征,并探讨了PM10与主要气象因素（如相对湿度、风速、气压、温度等）的关系。结果表明：贵阳市西郊PM10出现轻度污染,且春、夏、秋季PM10超标率分别是24％,25％,14％,超标倍数范围分别是0．04～0．49,0．02～0．35,0．09～0．48;春、夏、秋季的PM10／TSP比值平均值分别为62％,72％,69％,与北京、西安等城市的PM10／TSP比值结果相当,略高于安阳市;春、夏、秋季PM10浓度变化不大,夏季略高、秋季次高,春季略低。春季和秋末白天易出现高浓度污染,而夏季夜间易出现高浓度污染;PM10浓度与相对湿度、风速呈负相关关系,与气压呈正相关关系,与温度的相关性不大。     

喜树内生真菌的分离及产10-羟基喜树碱菌的鉴定

从喜树（Camptotheca acuminate Decne）树皮中分离、纯化得到6株内生真菌,经摇瓶培养后,采用TLC法与HPLC法对其菌丝体提取物进行分析,结果表明其中1株内生真菌(XK002)产10-羟基喜树碱（10-hydroxycamptothecin,HCPT）,将此菌株命名为XK002,其10-羟基喜树碱产量为410 μg/L.对菌株XK002菌落、菌丝体和孢子的有无进行了研究,表明菌株XK002属于无孢菌群(Mycelia sterlia).     

城市大气可吸入颗粒物的时空分布分析

对哈尔滨市七个监测点全年PM10 浓度数据做了时间、空间上的对比分析,并对春、冬季影响PM10 浓度变化的因素进行了多元线性统计分析.结果表明,哈尔滨市PM10 浓度全年超标率达50%,PM10 主要贡献因素是人为活动,采暖期燃煤污染是哈尔滨市PM10 浓度超标的主要原因,交通尘是日变化的主要原因,同时得到了春冬季回归预测模型.     

Cosmogenic 10Be dating of Guxiang and Baiyu Glaciations

Guxiang and Baiyu Glaciations are two previously recognized local glaciations of the Tibetan Plateau. They have been widely used as the reference standard for classifying Late Quaternary glaciations on the Tibetan Plateau and its surrounding mountains. However, the numerical chronologies of both glaciations have been lacking. In this study, cosmogenic They dating was undertaken to define the timing of these two glaciations. The surface boulders deposited by the glaciers of the Guxiang and Baiyu Glaciations have exposure ages of 112.9±16.7-136.5±15.8 ka BP and 11.1±1.9-18.5±2.2 ka BP, respectively. It is likely that the Guxiang and Baiyu Glaciations correspond to marine isotope stages 6 and 2, respectively.     

基于Multisim 10的三相电机正反转控制仿真实验

通过使用Multisim 10仿真软件实现了三相电动机正反转控制电路的仿真,实验证明结果正确。其结果对危险性电工电子实验的预习提供了新的方法,实现了逼真模拟操作,对高校学生实际操作能力的提高有重大的意义,同时减少了实验中的损耗。     

化工企业供配电系统中压电压等级的比选

本文从节约能源的角度并结合具体工程项目,通过计算比选分析,得出大型化工企业采用10kV配电电压等级较6kV经济合理的结论。     

Dust storms and loess accumulation on the Tibetan Plateau：A case study of dust event on 4 March 2003 in Lhasa

Whether the Tibetan Plateau is a significant dust source area is of great importance, because this is related to the understanding of sources, accumulation and environmental effects of dusts on the Tibetan Plateau and inthe Far East-Pacific Ocean regions as well as to the evointion of coupling of the Tibetan Plateau and atmaspbere-oeean-continent exchange. Synoptic dynamics and remote sensing tracing of a dust storm on 3 to 5 March, 2003 in Lhasa onSouth Tibet demonstrate that the Tibetan Plateau possessesall factors and conditions of generating dust storms. Accompanied with this dust storm is a strong ascending stream onthe Plateau which has raised various sizes of durst particlesinto different levels. The lifted coarse particles were largelyfallen down and accumulated as loess on the eastern TibetanPlateau, and the fine particles were translated by the westerly jet and subsided in the northern Pacific Ocean. The spa-tial-temporal distribution of dust-storms between years 1961and 2000 ou the Plateau shows that duststorms mainly occurin winter and early spring with high frequency, and tile pathof dust storm moves gradually from south to north, which isclosely coupled with the northward moving of the westerlyjet from winter to spring over the Tibetan Plateau. Com-pared with other twelve dust source areas in China. the Ti-betan Plateau is one of the key dust souree areas for thelong-distance transport because its high occurring frequencyand elevation cause fine particles easily to be lifted into thezone of the westerly jet.     

利用空间诱变选育辅酶Q10高产菌

 以空间搭载为诱变手段,筛选可用于工业化生产的辅酶Q10高产菌株。以类球红细菌（Rhodobacter sphaeroides）为出发菌株进行空间搭载,根据菌落形态进行初筛,摇瓶发酵进行复筛,HPLC检测含量等方法筛选辅酶Q10高产菌株。最终得到名为Shenzhou6的突变株产量比对照菌株提高30％,产量可达（0.8+0.02）g/L,经过优化培养可满足工业生产需要。同时也说明空间诱变因其复杂的空间环境条件,可以作为一种诱变手段进行工业化菌样的筛选。