We investigate the cross section of the heavy ion reaction (14.5 MeV/u) 132Xe + Bi by using a CR-39 plastic track detector. The target-detector assembly is expo
材料与方法 供试品种为四个西班牙类型品种(TMV—2、JH—113、西班牙改良和J11)和三个弗吉尼亚类型品种(MK374、RS1和M13),每品种200粒,设三个处理,(a)0.02%EMS,(b)0.02%NMU,
随着油菜生产的发展,符合规定的低芥酸油菜籽的检测收购将成为主要矛盾,关键是在收购的同时要快速、准确地测定油菜籽中的芥酸含量。本文根据薄层层析法测定油菜籽芥酸含量的
2019年8月31日,由中国科学院研制的微重力技术实验卫星在酒泉卫星发射中心成功发射. 9月20日,中国科学院宣布卫星在轨测试正在按计划有序开展,卫星状态正常,各项测试结果正常
目的:探讨腹腔镜子宫动脉阻断联合子宫肌瘤剔除术治疗子宫肌瘤的临床疗效。方法:选取240例子宫肌瘤患者随机分为研究组和对照组各120例,研究组给予腹腔镜子宫动脉阻断联合子
For efficient simulation of chemical systems with large number of reactions, we report a fast and exact algorithm for direct simulation of chemical discrete Mar
Ag-doped and pure ZrO2 thin films are prepared on Pt/Ti/SiO2/Si substrates by sol-gel process for resistive random access memory application. The highly reprodu
We investigate the influence of temperature on the efficiency of diode pumped Nd:YAG heat capacity laser is studied. It is shown that the efficiency of such a l
The relative partial cross sections for13C6+-Ar collisions at 4.15-11.08keV/u incident energy are measured.The cross-section ratiosσ2E/σsc,σ3E/σsc,σ4E/σsc
多媒体技术集中视、听、触等多感官作用于一体,丰富了学生直接经 验和感性认识,使其对所学知识理解得更为深刻透彻.还能使学生在学习中担当更为主动的角色,从而使其学习变得