Sex pheromone of <Emphasis Type="Italic">Ectinus aterrimus</Emphasis> (L<Emphasis Type="SmallCaps">inné</Emphasis>, 1761) (Coleoptera: Elateridae)

Summary.   Ectinus aterrimus (L.) is a fairly common European click beetle species which develops mainly in forests. In pheromone gland extracts of female E. aterrimus, examined using gas chromatography – mass spectrometry (GC-MS), one single compound was present. This was identified as 7-methyloctyl 9-methyldecanoate by comparison with a synthetic sample. Field trapping trials revealed a highly significant attraction of male E. aterrimus towards this ester. The structure of the compound differs remarkably from the pheromones of the closely related Agriotes spp., which exclusively use terpene esters.     

Design training and aesthetic evaluation: An intergroup comparison

A number of studies have observed differences in the evaluation of visual, aesthetic stimuli between those with and without professional training in art and design. If exposure to design training underlies such differences it follows that evidence of training effects should be observable when comparing subjects at different stages of design training, and not observable when comparing subjects at different stages of non-design training. In addition, this evidence should be consistent with directional predictions. The study reported in this paper investigated this question using a sample of 192 trained and untrained subjects in an evaluative task. Subjects were from two departments (Design and Computer Studies) of the same educational establishment and comprised balanced groups of lecturers, 1st, 2nd and 3rd year undergraduate students. The results obtained demonstrated evaluative differences and patterns of association both within and between the subject groups consistent with a training hypothesis.     

C9-AA水溶性石油树脂的制备及其阻垢性能

以乙烯生产过程中的副产物C9馏分和丙烯酸为原料,采用自由基溶液聚合,合成具有阻垢性能的C9-AA水溶性石油树脂。考察了引发剂AIBN和溶剂的加入量、C9-AA加入量、Ca^2＋浓度、循环冷却水pH和养护时间对C9-AA水溶性石油树脂阻垢性能的影响,并对其阻垢效果进行了评价。在Ca^2＋质量浓度小于或等于600mg／L、循环冷却水pH小于或等于9．3、C9-AA水溶性石油树脂加入量大于或等于15mg／L的条件下,C9—AA水溶性石油树脂对循环冷却水的阻垢率达到90％以上,其有效作用时间为60h。     

液化天然气储罐9％镍钢焊缝相控阵AUT工艺

9％镍钢液化天然气储罐制造安装过程中,焊缝检验通常用常规射线照相（RT）进行。本文研讨用相控阵半自动超声检测（AUT）取代射线照相的工艺制定及验证方法。要领分四步：首先带缺陷专用焊接试样的制备;然后相控阵AUT工艺的编制;其次在有已知缺陷的焊接试样上,对AUTT艺作“开放性”验证试验;最后在现场对整个数据采集系统作“封闭性”操作演示和验证评定试验。验证结果表明相控阵AUT取代RT可行可靠,能凸显AUT种种优势。     

Mosaicism of 46,XX/47,XX,+9/47,XX,+?mar in the same amniotic fluid with apparent loss of one cell line after delivery

A 46,XX; 47,XX,+9; 47,XX, + ?mar karyotype was detected in an amniotic fluid cell culture and confirmed in a subsequent fetal blood sample from a 40-year-old woman. After termination of the pregnancy, none of the 186 mitoses obtained from a second blood sample was trisomic for chromosome 9 (p<0.001). Selection against cells containing trisomy 9 is postulated to explain the disappearance of the lymphocyte clone.     

熔池高度对双辊薄带凝固组织影响的模拟预测

在已建立的理论数学模型的基础上,以1Cr18Ni9Ti不锈钢为研究对象,模拟预测了薄带厚度保持不变条件下熔池高度对薄带凝固组织的影响。研究结果表明:随着熔池高度增加,1Cr18Ni9Ti不锈钢双辊薄带凝固组织中柱状晶区比例首先增大,然后又逐渐减小。而柱状枝晶取向度和枝晶间距则随着熔池高度的增加而增大,但在较低的熔池高度条件下,柱状枝晶间距在凝固结束时有突然增大的趋势。     

基于WATER9模型的城镇污水处理中VOCs排放量研究

通过开展城镇污水处理模拟实验,与WATER9模拟结果比对和误差分析,使用优化后的WATER9模型模拟计算扬州汤汪污水处理厂一期工程的VOCs排放量,并分析各参数对VOCs排放量的影响.结果表明:WATER9模型满足城市污水处理厂污水处理过程中VOCs排放量的模拟要求,优化后的模拟值与实测值之间的相对偏差小于8％.实验结...