传送带问题类析     

黄干生  陈智 《中学生阅读》2007,(1):8-13

传送带是运送货物的一种省力工具，在装卸运输行业中有着广泛的应用，只要稍加留心，在工厂、车站、机场、装卸码头随处可见繁忙运转的传送带．2006年物理《考试大纲》在命题要求中明确提出高考命题“要重视理论联系实际。要关注科学技术、社会经济和生态环境的协调发展，以利于激发考生学习科学的兴趣，形成科学的价值观和实事求是的科学态度”．近年来无论是平时训练还是高考，均频繁地以传送带为题材命题，体现了理论联系实际，体现了把物理知识应用于日常生活和生产实际当中．  相似文献   

Investigation on apoptosis of neuronal cells induced by Amyloid beta-Protein     

罗本燕  徐增斌  陈智  陈峰  唐敏 《浙江大学学报(A卷英文版)》2004,5(8):989-994

Objective: To construct a PC12 cell strain with neuronal differentiation, and observe the apoptosis and pro-liferation activity effects induced these cells by Amyloid beta-Protein (Aβ-43). Methods: 1) PC12 cells in logarithmicgrowth phase were subcultured for 24 h. After the culture fluid was changed, the cells were treated with Rat-β-NGF andcultured for 9 days. 2) Neuronal differentiation of PC12 cells in logarithmic growth phase were divided into four groups:control group (0), experimental group (1), experimental group (2) and experimental group (3). The concentrations of Aβ inthe four groups were 0 μmol/L, 1.25 μ mol/L, 2.5 μ mol/L and 5 μmol/L, respectively. The cells were harvested at 24, 48 and72 h later and stained with AnnexinV-FITC/PI after centrifugation and washing. Then flow cytometry was conducted toexamine the apoptosis percentage. 3) NGF-induced PC12 cells were selected and Aβ with different concentrations wasadded. The final concentrations of Aβ were 0 μmol/L, 1.25 μmol/L, 2.5 μmol/L and 5 μ mol/L, respectively. After the cellswere incubated in an atmosphere of 5% CO2 at 37 ℃ in an incubator for 72 h, the OD values were examined. Results: 1)Neuronal differentiated PC 12 cell lines were successfully established. 2) Flow cytometric examination indicated that Aβ(1.25, 2.5, and 5.0 μmol/L) could effectively induce apoptosis of neuronal-differented cells at the 24 h, 48 h and 72 h timepoints. 3) Aβ (0-5.00 μ mol/L) had no obvious effect on proliferation or restraining of the neuronal differentiation of thePC 12 cells after a 72 h interacting process. Conclusion: This investigation revealed successful neuronal differentiation of thePC12 cell strain. The induction of apoptosis of the neurocytes by various concentrations of Aβ was observed and the in-fluence of Aβ on induced proliferation of PC 12 cells by Rat-β-NGF was revealed. This study -05 provide basis for futureresearch on the molecular cure of AD and interdiction of AD evolution.  相似文献   

Enhancing cellular immune response to HBV M DNA vaccine in mice by codelivery of interleukin-18 recombinant     

陈建忠  朱海红  刘克洲  陈智 《浙江大学学报(A卷英文版)》2004,5(4):467-471

Objective: To investigate the effect of interleukin-18 (IL-18) on immune response induced by plasmid encoding hepatitis B virus middle protein antigen and to explore new strategies for prophylactic and therapeutic HBV DNA vaccines. Methods: BALB/c mice were immunized with pCMV-M alone or co-immunized with pcDNA3-18 and pCMV-M and then their sera were collected for analysing anti-HBsAg antibody by ELISA; splenocytes were isolated for detecting specific CTL response and cytokine assay in vitro. Results: The anti-HBs antibody level of mice co-immunized with pcDNA3-18 and pCMV-M was slightly higher than that of mice immunized with pCMV-M alone, but there was not significantly different (P>0.05). Compared with mice injected with pCMV-M, the specific CTL cytotoxity activity of mice immunized with pcDNA3-18 and pCMV-M was significantly enhanced (P<0.05) and the level of IFN-γ in supernatant of splenocytes cultured with HBsAg in vitro was significantly elevated (P<0.05) while the level of IL-4 had no significant difference (P>0.05). Conclusion: The plasmid encoding IL-18 together with HBV M gene DNA vaccines may enhance specific TH1 cells and CTL cellular immune response induced in mice, so that IL-18 is a promising immune adjuvant.  相似文献   

一个由"早恋"所致的抑郁性神经症疏导案例     

陈智 《教育科学论坛》2003,(11):22-24

小强,男,高中二年级的学生.小强第一次来找我是今年5月的一个中午.他进来的时候,神情沮丧,显得很痛苦的样子.看到他的表情,我当时就断定,面前的这个同学不是简单的学习困扰或者说是单纯的同学交往问题.果然不出所料,该生正被早恋的苦恼困扰着.  相似文献   

爱撒娇的小麻雀     

陈智 《家教指南》2006,(3):64-64

台湾作家刘墉在《爱，因为抓不住》中写过这么一个故事：  相似文献   

新时代高校思政课教师继续教育现状及对策研究     

陈智 《成人教育》2018,(5):84-86

2018年《关于全面深化新时代教师队伍建设改革的意见》对教师继续教育提出了新要求,也为思政课教师的继续教育指明新方向和创新的新源泉.因此,文章在基于高校思政课教师继续教育现状分析的基础上,依据文件精神,紧紧把握政治方向,将文件精神融入继续教育全过程中,提出立德树人,强化继续教育德育功能;融合情景教育教学,构建"逆序创新"教育模式等对策,以解决新时代高校思政课教师继续教育所存在的问题.  相似文献   

胃镜污染HBV、HCV和HIV的调查   总被引：1，自引：0，他引：1  

周林福  朱海红  戴一扬  胡敏君  周云连  黄新  方洁  陈智 《科技通报》2004,20(1):70-72

目的　检测胃镜常规清洗消毒后HBV、HCV、HIV污染残留状况.方法　随机取样.巢式聚合酶链反应法检测HBV DNA,逆转录巢式聚合酶链反应法检测HCV RNA、HIV RNA,放免法检测HBsAg.结果　对605例标本进行检测,未检出阳性标本.结论　胃镜经常规消毒后未检到HBV、HCV和HIV的污染,但进一步规范胃镜消毒操作方法,提高消毒质量,意义重大.  相似文献   

开天辟地九十年高举火炬跟党走——中华青少年团队集体第十届全国“火炬引导我前进”夏令营纪实     

袁宝莹  宋志娇  陈智  李建生  孙临厚  李忠国  王启寅 《下一代》2011,(9):4-23

要丰富未成年人节假日参观旅游活动的思想道德内涵、精心组织夏令营、冬令营、革命圣地游、红色旅游、绿色旅游以及各种参观、瞻仰和考察等活动,把深刻的教育内容融入到生动有趣的课外活动之中,用祖国大好风光、民族悠久历史、优良革命传统和现代化建设成就教育未成年人。  相似文献   

我国高校ESG信息披露框架研究     

董江春  陈智 《黑龙江高教研究》2023,(9):134-140

随着全球可持续发展的持续推进，各国对ESG日益重视。在实现“双碳”目标、创建绿色学校、推进国家治理体系和治理能力现代化的背景下，高校对环境保护、社会责任以及高校治理的重视程度日益提高，然而，高校ESG方面的负面事件却频频曝光，高校ESG信息披露亟须加强。有鉴于此，在梳理和借鉴国际代表性ESG信息披露标准的基础上，从高校ESG信息披露的目标与原则、内容框架、披露方式等方面构建高校ESG信息披露框架，以期为我国制定高校ESG信息披露标准以及提升高校ESG表现提供借鉴。  相似文献   

科学技术：教育与生产劳动相结合的中介     

陈智  宋烈侠 《高等工程教育研究》1995,(4):37-40

科学技术：教育与生产劳动相结合的中介陈智，宋烈侠，阎桂芝，王晓阳教育与生产劳动相结合（以下简称教劳结合）是我国教育方针的基本内容之一。正确执行教劳结合方针的前提是正确理解教劳结合的方针，而要正确理解教劳结合的方针，我们认为，一要正确理解革命导师对教劳...  相似文献