扁藻细胞电镜观察的制样技术     

邹宁  魏丕伟  肖波  孙育平  王艳华 《烟台职业学院学报》2004,10(3):73-75

以海洋单细胞微藻亚心型扁藻为材料 ,对海水水样中活体单细胞微藻的亚显微结构观察样品的制备技术进行了探索。选用 2 .5 %的戊二醛固定液和 1 %的锇酸固定液对样品进行双固定的技术 ;先酒精后丙酮按浓度梯度顺次进行脱水 ;再用Epon81 2环氧树脂作为包埋剂进行包埋 ;最后经过醋酸铀 -枸橼酸铅双染色后将切片用透射电镜进行亚显微结构的形态观察。采用本方法进行水样中活体样品的电镜制片 ,拍得清晰度较高的电镜照片 ,并通过照片对水样中运动细胞透射电镜样品制备技术进行了分析。  相似文献   

提高阅读力     

R·S·费尔德曼 《出版参考》2003,(32)

阅读是我们终生都要进行的一项活动,以下一些要点对你获得更快,更有效的阅读方法大有裨益。 阅读的目的在于能记住多少东西,而不在于速度 你可能看到过一些介绍“系统”阅读的广告,他们声称能够教你快速阅读的方法,让你在一个小时左右之内读完一本书  相似文献   

Pathogenic Vibrio spp. in the Sea Bream, Sparus sarba     

N.Y.S.Woo  J.M.L.Ling  K.M.Lo 《中山大学学报论丛》1995,(3)

VibriosisisacommonandseriousdiseasecausedbybacterialspeciesofthegenusVibrioinalargenumberofmarinefishes.Thediseaseischaracterisedbygeneralsepticaemia,superficialskinlesionsandextensivehaemorrhages[1].Upuntilaround1980,VibrioanguillarumwastheonlyVibriospecieswhichhadbeenshowntobethecausativeagentofvibriosis.However,recentstudieshaverevealedthatseveralotherVibriospeciessuchasV.alginolyticus,V.ordalli,V.damsela,andV.salmonicchwerealsoPOtentialfishpathogens.V.alginolyticus,V.porahaemolyticusa…  相似文献   

二十一世纪的全球教育     

S·拉姆勒  夏惠贤 《比较教育研究》1993,(3)

1989年年末东欧和苏联的剧变,悬而未决的欧洲经济一体化、东西德的统一及日本对全世界的影响一——所有这些问题都将深刻地影响着九十年代,并将决定二十一世纪的进程。我们的学生应该了解:在未来世界中我们所熟悉的地缘政治边界和经济设想正在被新的现实所取代。这些都呼唤着有实质性的各级各类学校的全球教育。  相似文献   

宇宙的膨胀速率和大小     

Free.  WL 肖波 《科学中国》1993,(3):9-15

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极紫外天文学     

Bowye.  S 肖波 《科学中国》1994,(12):15-22

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Irwin h. Pizer, twentieth editor of the bulletin     

Crawford S 《Bulletin of the Medical Library Association》1989,77(1):77-78

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Introducing computer literacy skills for physicians     

Collins B  Linton A  Merril J  Pomerantz K  Winthrop S 《Medical reference services quarterly》1992,11(4):1-9

Computers are integral to medical practice, education, and research. While medical students learn computer skills during their training, many practicing physicians do not have the same computer experience. To familiarize this group with the exciting developments in medical informatics, the Himmelfarb Health Sciences Library and Department of Computer Medicine at the George Washington University Medical Center organized a workshop "Introducing Your Office Computer!" for attending physicians. The workshop featured a short lecture/video presentation on computer applications in medicine followed by a "computer fair" of five computer applications. Eleven physicians attended the workshop. Feedback was very positive; many called later to request more detailed instructions on using the programs demonstrated. It was a valuable experience for the staff, and new bridges were built between departments and clients.  相似文献   

The standard issues     

Wallace S 《Inform (Silver Spring, Md.)》1992,6(1):14-6, 18-9

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Regulating IVF: a reply to concerns     

Lee S 《New scientist (1971)》1991,131(1783):8

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