搜索结果: 1-13 共查到“理学 :SOS”相关记录13条 . 查询时间(0.046 秒)
中国科学院遗传与发育生物学研究所谢旗研究组发现植物耐盐SOS途径发挥功能的必需因子（图）
中国科学院遗传与发育生物学研究所 谢旗 植物耐盐 SOS途径 发挥功能 必需因子
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2020/5/28
中国科学院遗传与发育生物学研究所谢旗研究组发现拟南芥ESCRTs（Endosome Sorting Complex Required for Transports）的一个关键组分VPS23A参与植物对盐胁迫的响应。盐胁迫下，vps23a突变体中SOS2细胞膜定位减少，导致SOS1的磷酸化水平降低，从而使SOS1活性受到抑制，结果Na+外排能力降低，vps23a突变体表现出对盐胁迫敏感的表型。进一步...
The SOS response in Escherichia coli: Single cell analysis using fluorescence microscopy
Biological sciences DNA repair RecA SOS response
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2015/1/28
During the course of DNA replication, replication forks often stall or collapse as they proceed from oriC to the terminus due to housekeeping types of DNA damage or proteins bound to DNA. If the DNA i...
Reca Dynamics & the SOS Response in Escherichia Coli: Cellular Limitation of Inducing Filaments
DNA damage RadA RecA SOS response
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2015/1/28
During the course of normal DNA replication, replication forks are constantly encountering "housekeeping" types of routine damage to the DNA template that may cause the forks to stall or collapse. One...
A new approach to the results of Kovari, Sos, and Turan concerning rectangle-free subsets of the grid
Turan concerning rectangle-free subsets of the grid Combinatorics
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2012/6/21
For positive integers $m$ and $n$, define $f(m,n)$ to be the smallest integer such that any subset $A$ of the $m \times n$ integer grid with $|A| \geq f(m,n)$ contains a rectangle; that is, there are ...
Algebraic boundaries of Hilbert's SOS cones
Positive polynomials K3 surfaces Hilbert's SOS cones
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2011/8/31
Abstract: We study the geometry underlying the difference between non-negative polynomials and sums of squares. The hypersurfaces that discriminate these two cones for ternary sextics and quaternary q...
Elliptic dynamical reflection algebra and partition function of SOS model with reflecting end
Dynamical reflection algebra Boundary SOS model
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2011/1/17
We introduce in this paper an elliptic dynamical reflection algebra describing an SOS model with reflecting end. Using factorizing Drinfel’d twist, we compute the partition function of this model with...
Elliptic dynamical reflection algebra and partition function of SOS model with reflecting end
Dynamical reflection algebra Boundary SOS model Factorizing Drinfel’d twist
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2010/12/28
We introduce in this paper an elliptic dynamical reflection algebra describing an SOS model with reflecting end. Using factorizing Drinfel’d twist, we compute the partition function of this model with...
Spin chains with non-diagonal boundaries and trigonometric SOS model with reflecting end
Spin chains non-diagonal boundaries trigonometric SOS model
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2010/12/24
In this paper we consider two a priori very different problems: construction of the eigenstates of the spin chains with non parallel boundary magnetic fields and computation of the partition function ...
SOS！濒临极限的生物多样性
生物多样性保护 持续利用 生物多样性产业
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2009/9/10
样性资源，不仅不影响野生资源，而且能替代它，或减缓其压力，或促进其恢复的高新技术产业，在税收上给予特别优惠。本文论述了生物多样性的价值、多样性丧失的严重性和后果，以及多样性保护与持续利用的对策。文中强调指出，生物界中的每片基因，每一个物种，每一类生态系统对人类的持久生存都是无价之宝，任何多样性的丧失都是不可逆、不可再生的，因而对人类的损失是难以估量的。然而目前由于人类剧烈的活动干扰如滥砍滥伐、滥捕...
SOS数学是免费的数学在线资源。内容包括代数学、三角学、微积分学、微分方程式、复变数、矩阵代数以及大量数学测试题。
土壤盐渍化是影响农业生产和生态环境的一个非常重要的非生物胁迫因素，也是现代生物科学迫切需要解决的问题。利用拟南芥研究植物耐盐相关基因成为该领域的研究热点。几年来，该领域研究成果斐然。本文就SOS基因家族的三个耐盐基因SOS1、SOS2和SOS3的克隆、功能及相互关系作一概要的评述。
不对称二苯乙炔系列衍生物的二阶非线性光学性质的ZINDO-SOS 研究
二苯乙炔 非线性光学 电荷转移 国家教委高等学校博士学科点专项科研基金
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2007/12/20
摘要 在ZINDO方法基础上,按完全态求和(SOS)公式编制了计算分子二阶非线性光学系数β~i~j~k,β~μ的程序;研究了不对称二苯乙炔系列衍生物的结构和非线性光学性质;计算了不对称二苯乙炔系列衍生物的UV光谱,偶极矩,β~μ,β~0,μβ,μβ~0,及激发态电荷转移;考察了分子共轭链长、给电子基团对β~μ的影响。并对上述结果在微观上给予了解释。