浅谈学生群体冬季呼吸道传染疾病的预防     

卜秀芹 《潍坊教育学院学报》2006,19(4):107-108

呼吸道传染疾病是冬季的多发疾病。大学生居住和学习环境相对集中,做好该类疾病的预防具有重要意义。本文针对呼吸道传染疾病的发生特点和有效可行的预防方法作了阐述。  相似文献   

湛江雨豆树引种试验初报     

卜浩 《赤峰学院学报(自然科学版)》2011,27(1):5-6

针对湛江市试种5年的雨豆树的生长发育情况表现,对其在湛江的生长适应性进行比较系统的研究.结果表明:雨豆树表现速生、抗旱、抗风、无虫和易移植等优点;每年短暂的低温寒流并未对它的生长有明显的影响,在持续极端低温阴雨气候下,雨豆树受害较严重,但其灾后恢复生长力最强,速度最快.试验证明,雨豆树可适量种植绿化,以增加湛江城市绿化...  相似文献   

The Action Effect of and Influencing Factors in University Teachers'Sense of Teaching Efficacy:Theoretical Analysis and Application     

Wang Xuhui 《辽宁教育研究》2008,(11)

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改革计算机教学模式 提升学生实践能力     

卜言彬  周友江 《中国教育技术装备》2012,(21):64-65

针对目前高校计算机教学中普遍存在的问题,以计算机基础课为例,结合南广学院在计算机基础课教学模式改革中的经验,对高校计算机教学模式进行探讨。  相似文献   

农村幼儿园教师的“规矩困惑”——以浙江嘉善县为例     

王晓萍  邬惠萍  步社民 《幼儿教育》2012,(30):14-18

本研究以浙江嘉善县为例,从《幼儿园教师专业标准(试行)》和幼儿园教师专业伦理视角分析农村幼儿园教师所表现出来的"越过底线""规矩不明""左右为难"三种"规矩困惑"现象,并从从业者现状、"规矩建设"现状、"规矩教育"现状三方面分析"规矩困惑"形成的原因以及解决之道。  相似文献   

DSP实验课程教学研究与探索     

刘卫东  卜丽 《实验技术与管理》2012,29(3):170-172

在对DSP实践教学现状分析的基础上,从教学内容和教学方法出发,采用双语教学、优化实验内容、自制仪器设备、多种媒体教学结合、开放实验室及开展科技活动等几个方面进行了探讨,并提出了相应的方法和措施,以提高学生的主观能动性,提高实验的教学效果。  相似文献   

CET-4快速阅读理解测试的语篇特点分析及启示     

卜囡囡 《黄山学院学报》2012,(2):126-128

以大学英语四级考试改革后近5年的快速阅读部分为研究对象,依据Bachman和Palmer提出的语言任务特征模式,采用定性和定量相结合的方法,对语篇进行数据收集和分析,并结合《大学英语考试大纲》,探讨该测试部分的语篇特点,总结了提高阅读理解能力的方法和改善阅读理解教学的方式。研究结果表明,近5年大学英语四级考试快速阅读部分的体裁和题材不够宽泛,阅读速度超过大纲规定且难度较高。  相似文献   

Alleviative effect of quercetin on germ cells intoxicated by 3-methyl-4-nitrophenol from diesel exhaust particles     

Tong-liang Bu  Yu-dong Jia  Jin-xing Lin  Yu-ling Mi  Cai-qiao Zhang 《Journal of Zhejiang University. Science. B》2012,13(4):318-326

As a component of diesel exhaust particles, 3-methyl-4-nitrophenol (4-nitro-m-cresol, PNMC) is also a metabolite of the insecticide fenitrothion and imposes hazardous effects on human health. In the present study, the alleviative effect of a common antioxidant flavonoid quercetin on mouse germ cells intoxicated by PNMC was investigated. Results showed that a single intraperitoneal injection of PNMC at 100 mg/kg induced severe testicular damage after one week. PNMC-treated mice showed a significant loss of germ cells (approximate 40% loss of round germ cells). PNMC caused an increase of hydroxyl radical and hydrogen peroxide production and lipid peroxidation, as well as a decrease in glutathione level, superoxide dismutase and glutathione peroxidase activities. Furthermore, treatment of PNMC increased expression of the pro-apoptotic protein Bax and decreased expression of the anti-apoptotic protein Bcl-XL in germ cells. In addition, testicular caspase-3 activity was significantly up-regulated and germ cell apoptosis was significantly increased in the PNMC-treated mice. In contrast, combined administration of quercetin at 75 mg/kg significantly attenuated PNMC-induced testicular toxicity. These results indicate that the antioxidant quercetin displays a remarkable protective effect on PNMC-induced oxidative damage in mouse testes and may represent an efficient supplement to attenuate reproductive toxicity by environmental toxicants to ensure healthy sperm production.  相似文献   

Impairment of liver regeneration by the histone deacetylase inhibitor valproic acid in mice     

Qi Ke  Rui-na Yang  Feng Ye  Yu-jia Wang  Qiong Wu  Li Li  Hong Bu 《Journal of Zhejiang University. Science. B》2012,13(9):695-706

Background and objective: Liver regeneration is a complex process regulated by a group of genetic and epigenetic factors. A variety of genetic factors have been reported, whereas few investigations have focused on epigenetic regulation during liver regeneration. In the present study, valproic acid (VPA), a histone deacetylase (HDAC) inhibitor, was used to investigate the effect of HDAC on liver regeneration. Methods: VPA was administered via intraperitoneal injection to 2/3 partially hepatectomized mice to detect hepatocyte proliferation during liver regeneration. The mice were sacrificed, and their liver tissues were harvested at sequential time points from 0 to 168 h after treatment. DNA synthesis was detected via a BrdU assay, and cell proliferation was tested using Ki-67. The expressions of cyclin D1, cyclin E, cyclin dependent kinase 2 (CDK2), and CDK4 were detected by Western blot analysis. Chromatin immunoprecipitation (ChIP) assay was used to examine the recruitment of HDACs to the target promoter regions and the expression of the target gene was detected by Western blot. Results: Immunohistochemical analysis showed that cells positive for BrdU and Ki-67 decreased, and the peak of BrdU was delayed in the VPA-administered mice. Consistently, cyclin D1 expression was also delayed. We identified B-myc as a target gene of HDACs by complementary DNA (cDNA) microarray. The expression of B-myc increased in the VPA-administered mice after hepatectomy (PH). The ChIP assay confirmed the presence of HDACs at the B-myc promoter. Conclusions: HDAC activities are essential for liver regeneration. Inhibiting HDAC activities delays liver regeneration and induces liver cell cycle arrest, thereby causing an anti-proliferative effect on liver regeneration.  相似文献   

论中国红在室内设计中的运用     

布爱英 《河南科技学院学报》2012,(1):84-86

分析中国传统文化元素的发展历程以及在室内空间中的具体应用,结合对现代室内设计手法的研究,文章对如何运用中国红创造中国传统与现代相结合的室内设计风格,体现出以人为本的设计理念进行了深入探讨。  相似文献