共查询到20条相似文献,搜索用时 78 毫秒
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《化学工程师》1993,(5)
刊名期数订价(元)巧.0030.00!2.的】a80征订单位邮政编码﹃︸删哪撇溯撇幽绷︸溯﹃咖服脚化学工程师柯南化工吉林石油化工辽宁化工*侮化工宁夏化工甘南化工陕西化工山西化工山东化工河北化工湖北化工翻南化工浙江化工枉苏化工安徽化工福建化工四川化工云南化工江西化工广西化工广东化工贵州化工北京化工天津化工上海化工新l化工世界化工湿法冶金化工科技动态徐料文摘精细与专用化学品煤炭加工与综合利用 3,oo14.的12.的14.田 9.2020.0012.的10.印12.的14.0012.0010.0012.0016.的 8.oo 8,oo12的哈尔滨市道里区新阳路540号《化学工程师》编辑… 相似文献
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《江苏化工》1988,(4)
12:1 3.1 4.15,16。1了。18.19。20.21。22,23。2 4.25。河南化工吉林石油化土辽r宁化工青海化工宁夏化工甘肃化工陕西化工山西化工山东化工河北化工化学工程师湖北化工湖南化工浙江化工江苏化工安徽化工福建化工四川化工云南化工江西化学化工广西化工)一‘东化工北京化工苏泛津化工_L海化工8吐810867 .2012688688888 征订单位郑州市建设东路37号河南省石化厅技术情报中心站长春市斯大林大街77号吉林省石油化工设计研究院沈阳市和平区青年大街二段8号辽宁化工编辑部西宁市新宁路24号青海化工编辑部银川市文化西街17号宁夏化工研究所兰州市… 相似文献
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成功的塑料热成型工艺解决方案,要求对加工工艺、模具设计、材料性能等因素进行全面综合分析。众多的热成型加工厂商往往只着眼于调整和改进工艺,以此来解决生产过程中所遇到的各种制品缺陷问题。其中采取的措施包括:试图延长加工循环周期、二次加工工序、或者通过改良设备装置 相似文献
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John A. Byers 《Journal of chemical ecology》1982,8(2):363-371
When both sexes of the bark beetle,Dendroctonus brevicomis LeConte, were exposed to vapors of myrcene from ponderosa pine, only the male produced (+)-ipsdienol. In the field, racemic ipsdienol significantly reduced the attraction of both sexes in flight to a mixture of myrcene and the aggregation pheromones,exo-brevicomin and frontalin. This suggests that ipsdienol may be involved in regulating colonization density ofD. brevicomis. The implications of the biosynthesis of various enantiomers of ipsdienol byD. brevicomis and the cohabitating bark beetles,Ips paraconfusus andI. pini, in relation to their behavioral responses are discussed in regard to reducing interspecific competition.Coleoptera: Scolytidae. 相似文献
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电镀污泥中铜、镍、铬、锌的回收利用研究 总被引:3,自引:0,他引:3
研究电镀污泥中铜、镍、铬、锌的回收工艺流程,确定最佳的工艺条件。结果表明,电镀污泥中铜、镍、铬、锌的浸出率分别达到97.8%、98.6%、94.8%和99.0%,并可循环回收;废渣无害化,可按一般工业固废处置;生产过程闭路循环,无任何排放,实现清洁生产. 相似文献
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MaleI. paraconfusus confined to artificial entrance tunnels in white fir logs produced the pheromone compounds ipsenol and ipsdienol in their hindguts. The hindguts were attractive to females in a laboratory olfactometer and the male infested logs were attractive in field bioassay. The amount of pheromones produced and the amount of feeding and boring activity is much less in white fir than in ponderosa pine. There were no pheromones detected in the hindguts of recently emerged, unfed males.Coleoptera; Scolytidae.Research supported by the Rockefeller Foundation, an NIH training grant, USDA/SEA Regional Research Project W-110, and the USDA Forest Service.From a thesis submitted by J.S. Elkinton in partial satisfaction of the requirements for the PhD degree, University of California, Berkeley, California, 1979. 相似文献
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We propose that one mechanism whereby male rats,Rattus norvegicus, might gauge the reproductive condition of a female is by calibrating a stable odor with an odor that fluctuates through her reproductive cycle. We provide behavioral and histological evidence in support of such a self-calibration model. Male rats sniffed frequently at various body zones of females, and the proportion of sniffs deployed to each zone varied with the females' reproductive condition and relatedness. The females' haunches received more sniffs than any other part of their bodies, irrespective of their relatedness or reproductive condition. Furthermore, males tended to sniff the haunch after sniffing the forequarters, as part of a sequence of sniffing along a female from forequarters to hindquarters. Histology of the skin sebaceous glands indicated that the secretory activity of glands in the haunch, but not those in the forequarters, changed during estrus. Therefore, male rats had the opportunity to judge a female's reproductive status by calibrating the odor of her haunch against that of her forequarters. Self-calibration could represent a means of accommodating differences in odor within individuals. 相似文献
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茂石化聚丙烯车间的C902A/B是用来输送颗粒到包装车间的罗茨风机,其设计能力为50t/h。自96年开车以来,其输送能力一直在20-25t/h,远远没有达到设计能力。98年经过长达两年的技术攻关,终于使风机C902A/B的正常使用时间缩短了一半,给生产带来了极大的方便。 相似文献
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