搜索结果: 151-165 共查到“理学 biological”相关记录232条 . 查询时间(0.062 秒)
A framework for developing ecosystem-specific nutrient criteria: Integrating biological thresholds with predictive modeling
ecosystem-specific nutrient criteria Integrating biological thresholds predictive modeling
2014/4/21
We present a novel ecosystem-specific framework for developing nutrientcriteria from biological thresholds and predictive modeling (BTPM) and an application of this framework to lakes in Michigan, U.S...
The impact on atmospheric CO2 of iron fertilization induced changes in the ocean's biological pump
atmospheric CO2 iron fertilization ocean's biological pump
2010/1/15
Using numerical simulations, we quantify the impact of changes in the ocean's biological pump on the air-sea balance of CO2 by fertilizing a small surface patch in the high-nutrient, low-chlorophyll r...
International Journal of Biological Sciences（图）
International Journal of Biological Sciences cell biology microbiology biochemistry 细胞生物学 微生物学
2008/1/16
International Journal of Biological Sciences publishes peer-reviewed scientific papers of significance in all areas of biological sciences. Articles include original research papers, short research co...
拟南芥LEAFY基因在花发育中的网络调控及其生物学功能Regulation Network and Biological Roles of LEAFY in Arabidopsis thaliana in Floral Development
LFY基因 基因网络 生理因子 花发育
2008/1/10
摘要 重点综述了拟南芥花分生组织特征基因——LEAFY（LFY）基因及其同源基因在花发育中的网络调控及其生物学功能。LFY基因广泛表达于高等植物的营养性和生殖性组织。LFY基因需要与其他基因相互作用，並且表达量达到一定水平时才能促进成花。LFY基因处于成花调控网络的关键位置，不仅调控开花时间和花转变，而且在花序和花的发育中也起重要作用。碳源、植物激素等因子直接或间接地影响LFY基因的表达和作用。提...
摘要
生物钟基因普遍存在于生物界，其作用在于产生和控制昼夜节律的运转。生物钟基因及其编码的蛋白质组成反馈回路，维持振荡系统持续进行并与环境周期保持同步。各级进化水平物种生物钟的基因组成和控制途径有同有异。此文主要介绍蓝细菌、脉孢菌、果蝇、鼠和人昼夜钟的分子运作机制以及研究钟基因的意义和展望。
Abstract:The circadian clock genes,which generate ...
On the analysis of a biological system: Compartment model approach
Compartment models controllability optimal control
2010/9/16
In this paper, we are interested in control of a substance which circulate among organs in leaving being. We determine, under certain conditions,the optimal control which steers such systems from an i...
两例事故受照者染色体畸变分析及生物剂量估算Biological Dose Assessment by the Analyses of Chromosomal Aberrations and CB Micronuclei in Two Victims Accidentally Exposed to 60Co γ-rays
事故照射 染色体畸变 CB微核 生物剂量
2007/12/29
应用外周血淋巴细胞染色体畸变和CB微核分析方法，对2000年河南许昌“3.06”60Co辐射事故1例受照者(A)和2000年河南开封“6.26”辐射事故一例过量放射性核素内污染致γ射线照射受照者(B)的生物剂量进行估算。结果表明，“A”和“B”两例受照者依据双+环率估算的剂量分别为1.44Gy和0.15Gy，CB微核率估算的剂量分别为1.43Gy和0.22Gy，与用物理方法估算的剂量比较接近，亦与...
分子生物学技术在遗传病诊断中的应用The Application of Molecular Biological Techniques in Diagnosis of Human Genetic Diseases
遗传疾病 基因诊断 分子生物学技术
2007/12/7
摘要论述了遗传性疾病的发病机理和遗传病诊断的途径和策略,着重介绍了人类遗传疾病基因诊断技术的原理和发展状况,对该领域的新成果作了介绍和总结,对发展动向和存在的问题作了简要论述。
Abstract:The mechanisms of human genetic diseases and strategies to test human genetic diseases are discussed ...
Alu家族及其生物学意义Alu family and its biological significance
Alu家族 基因调控 疾病 生物进 Alu family gene regulation disease human evolution
2007/12/5
Alu家族是灵长类基因组特有的含量丰富的短散在重复序列，在基因组中的拷贝数现在已经达到了50万，每个拷贝长度约300 bp。目前，对于Alu序列的功能了解得还不透彻，推测主要与基因调控有关，如基因重排、CpG甲基化、hnRNA选择性剪切、结合转录因子和激素等。同时，Alu家族是人类群体遗传学、法医学、肿瘤学等的重要研究手段。Alu元件的插入、删除和重组导致了许多先天性遗传疾病和癌症。Abstrac...
Microbiology and atmospheric processes:the role of biological particles in cloud physics
Microbiology and atmospheric processes biological particles cloud physics
2010/1/15
As part of a series of papers on the sources, distribution and potential impact of biological particles in the atmosphere, this paper introduces and summarizes the potential role of biological particl...
Study Under AC Stimulation on Excitement Properties of Weighted Small-World Biological Neural Networks with Side-Restrain Mechanism
small-world networks biological neural networks
side-restrain mechanism Hodgkin-Huxley equations
2007/8/15
2007Vol.47No.2pp.369-373DOI:
Study Under AC Stimulation on Excitement Properties of Weighted Small-World Biological Neural Networks with Side-Restrain Mechanism
YUAN Wu-Jie,1,2 LU...
专著信息
书名
Study of biological characteristics of murine dermal mesenchymal stem cells and their enhancement of hematopoiesis recovery.
语种
英文
撰写或编译
作者
Zhao RCH,Ma L,Hu Y,Ma GJ,Jiang XY
第一作者单位
出版社
Zhonghu...
专著信息
书名
Biological activities of skin secretions of Salamander Tylototriton verrucosus
语种
英文
撰写或编译
作者
Lai Ren,Yang Dong-Ming,Lee Wen-Hui,Zhang Yun
第一作者单位
出版社
J. Natural Toxins 11, 234-238. (2002), SCI...
专著信息
书名
Comparative study of the biological activities of the skin secretions from six common Chinese amphibians
语种
英文
撰写或编译
作者
Lai Ren,Zhao Yu,Yang Dong-Ming,Zha Hong-Guang,Lee Wen-hui,Zhang Yun
第一作者...
专著信息
书名
7. Construction and biological activities of human t-PA eukaryotic expression plasmid.
语种
英文
撰写或编译
作者
Zhong-jun Wu,Xiao-hong Yang,De Shi
第一作者单位
出版社
Hepatobilliary Pancreat Dis Int, 2004,3(4):5...