兰州西固地区光化学烟雾污染气质模式

以兰州西固地区为研究对象,建立了描述该地区光化学烟雾污染的大气质量模拟模式——柱子模式。将该模式与实测数据进行了比较,结果表明,该模式基本上能够定量地描述当地所发生的光化学烟雾污染的主要污染物的时空分布及形成过程,可为污染评价、预测及污染治理提供依据。     

开口圆管非对称弯曲的一种方法

开口圆管非对称弯曲时,在尺寸、形状均有较高精度要求的情况下弯曲有一定的难度。此文介绍了一种成功的开口圆管非对称弯曲冷态成形方法。     

Insektenpheromone

Pheromones — semiochemicals used by insects for intraspecific chemical communication — can be isolated and with special analytical techniques their chemical structure elucidated. With stereoselective synthesis methods, presented by the preparation of sex attractants and aggregating pheromones of moths and beetles, respectively, a synthetic access to compounds is given which can be used for behavior manipulation of insects. Aside the importance of these compounds for investigations of the sensoric process the possibility of their application in an integrated and biological pest control is discussed.     

A new pheromone of the silkworm moth Bombyx mori

The female silkmoth Bombyx mori L. emits a second pheromone component bombykal (E-10, Z-12-hexade-cadien-1-al) in addition to the well-known sexual attractant bombykol (E-10, Z-12-hexadecadien-1-ol). Bombykal stimulates its own specialized and highly sensitive olfactory cells of the male moth. Surprisingly, the aldehyde inhibits the release of the male's wing-fluttering response to bombykol.     

城镇污水资源化技术发展状况

污水资源化是解决当前水资源短缺，减少环境污染的有效途径，经过几十年的发展，城镇污水资源化技术取得了很大进展，讨论了城镇污水资源化的意义、技术和发展前景。