Dependence of nucleotide physical properties on their placement in codons and determinative degree

INTRODUCTION It is well-known from the genetic code structure that there exists a connection between codons and physical and chemical amino acid properties (Lewin, 1983). Codon properties in turn are defined by physical properties of the nucleotides from which they are compounded (Ratner, 1985; 2000). The most important properties of nucleotides as complex three-dimensional molecules are their dipole moment, heat of formation and energy of the most stable con- formation (Schneider and Be…     

Scaling behavior of nucleotide cluster in DNA sequences

In this paper we study the scaling behavior of nucleotide cluster in 11 chromosomes of Encephalitozoon cuniculi Genome. The statistical distribution of nucleotide clusters for 11 chromosomes is characterized by the scaling behavior of P（S） ∝ e^-αs＇ where S represents nucleotide cluster size. The cluster-size distribution P（S1＋S2） with the total size of sequential C-G cluster and A-T cluster S1＋S2 were also studied. P（S1＋S2） follows exponential decay. There does not exist the case of large C-G cluster following large A-T cluster or large A-T cluster following large C-G cluster. We also discuss the relatively random walk length function L（n） and the local compositional complexity of nucleotide sequences based on a new model. These investigations may provide some insight into nucleotide cluster of DNA sequence.     

DNA的二维图表示

给出了新的DNA二维图表示,证明了该表示是非退化的,并提出了一种新的DNA相似度计算方法.     

Regularities in the E. coli promoters composition in connection with the DNA strands interaction and promoter activity

INTRODUCTION It is well known that the physical properties, namely DNA strands interaction in promoter are connected with their activity. As it was established the two promoter regions ?35 and ?10 are the most important for the promoter functioning, all bases in the ?35 (TTGACA) and ?10 (TATAAT) hexamers were highly conserved (Harley and Reynolds, 1987; Hawley and McClure, 1983). The functional impor- tance of these sequences was proved in many inves- tigations (Record et al., 199…     

金融硕士专业学位与学术型学位培养模式比较研究

为了实现分类培养的教育目标,采用逻辑分析方法和对比分析方法,从培养目标、培养规格、课程体系、学习方式、教学方式和质量评价方法等方面对金融硕士专业学位研究生培养模式与学术型金融学硕士研究生培养模式之间的差异进行分析,作为研究生培养单位制定金融硕士专业学位与金融学学术型硕士研究生培养方案的参考。     

美国专业学位研究生教育的学位结构及启示

从系统理论视角研究美国专业学位研究生教育学位的层次结构、类型结构和学科结构的结果表明,美国专业学位研究生教育的学位结构具有层次分明、类型多样、学科柔性等特征。我国专业学位的发展需要明确学位类别、建立专业学位体系,满足社会需求、扩大专业学位规模,丰富学位类型、扩展专业学位学科。     

Statistical properties of nucleotide clusters in DNA sequences

Using the complete genome of Plasmodiumfalciparum 3D7 which has 14 chromosomes as an example, we have examined the distribution functions for the amount of C or G and A or T consecutively and non-overlapping blocks of m bases in this system. The function P(S) about the number of the consecutive C-G or A-T content cluster conforms to the relation P(S)oce-as;values of the scaling exponent αCG are much larger than αAT; and αAT of 14 chromosomes are hardly changed, whereas αCG of 14chromosomes have a number of fluctuations. We found maximum value of A-T cluster size is much larger than C-G, which implies the existence of large A-T cluster. Our study of the width function ξ(m) of cluster C-G content showed that follows good power law ξ(m)ocm-γ. The average γ for 14 chromosomes is 0.931. These investigations provide some insight into the nucleotide clusters of DNA sequences, and help us understand other properties of DNA sequences.     

推行主辅修制和双学位制的实践

介绍了辅修专业／双学位制的发展背景，阐述了辅修专业／双学位制的基本内涵、意义及其培养方案，指出了实行辅修专业／双学位制下如何对学生进行管理，以及教师如何引导学生选修，以提高修读率。     

我国学位与研究生教育特色分析

我国学位与研究生教育在培养制度和管理制度方面都具有不同于其他国家的特色。在培养制度方面,硕士学位教育是一种"终结性"而非通向博士学位的"过渡性"学位教育;博士培养采取导师指导下课程学习和科研相结合的方式;研究生培养类型多样,渠道多元;重视研究生教育的质量和研究生创新能力的培养。管理制度特色主要体现在实行三级管理制度、学位授予权审核制度、研究生院制度等方面。     

学位与学科建设信息管理

质量与效率历来是管理工作的灵魂 ,本文从管理的角度论述了建立学位与学科建设信息管理系统的重要性 ,以学位与学科建设处信息数据库为例着重探讨了学位与学科建设信息管理系统的具体实现方案、总体框架和功能等 ,并简要讨论了以后的应用和功能扩展。     

导数-比导数波谱法同时测定DNA和RNA

用导数．比导数波谱同时测定DNA和RNA，并探讨了最佳测定条件。当DNA和RNA的浓度在最佳线性范围加．140μg／ml内，其标准曲线方程分别为Y=0．0035X 0．0142(r=0．9982)和Y=0．0248X-0．0235(r=0.9997)，检测限分别为2．0355μg／ml和0．0359μg／ml，回收率为87．5％-111．0％，相对标准偏差不大于6．76％。该法用于合成样品分析，结果满意。     

城市居民交际能力满意度与人际关系满意度调查——以江西省宜春市为例

交际能力满意度与人际关系满意度是人们的一种主观感受。本研究对江西宜春市北部、中部、南部8个城市的居民交际能力满意度与人际关系满意度进行问卷调查,通过收集第一手数据,对具有不同人口特征的居民人际关系满意度和交际能力满意度进行统计描述,并分析客观条件(人口特征变量、经济特征变量)和主观条件(交际能力满意度)与人际关系满意度的关系及影响程度,并提出提高人际关系满意度的建议。     

HBV DNA与HBV-m对比分析

目的：探讨荧光定量PCR检测HBV DNA与HBVm的关系。方法；采用荧光定量PCR法和酶联免疫吸附试验（ELISA）对159份HBVm8种不同阳性模式及67份HBVm全阴模式血清进行HBV DNA检测。结果；HBsAg、HBcAb、HBeAe阳性者HBV DNA阳性率为89．83％；HBsAg、HBcAb、HBeAb阳性者HBV DNA阳性率为28．81％；HBsAb、HBcAb、HBeAb阳性者HBV DNA阳性率为16．66％；HBVm全阴性者HBV DNA阳性率为17．91％。结论：荧光定量PCR法检测HBV DNA是乙型肝炎病毒复制最直接可信的指标．可反映HBV真实感染和复制状态．特别是低复制状态，明显优于ELISA法检测HBVm，具有重要临床意义。     

美国专业学位研究生教育及其启示

美国的研究生教育事业后来居上,在办学规模、办学质量和办学形式等方面都遥居世界前列,屡有创新和开拓。作为美国研究生教育实用部分的专业学位研究生教育,研究其内涵、特色及其兴起与发展的过程和社会条件,可以对我国专业学位研究生教育的发展有一定的启示和借鉴意义。     

中美食品类本科专业设置的比较与借鉴

人才培养必须随时调整以适应社会需求,本文比较了中美(江浙、台湾及美国东北)食品类本科专业目录及高等教育机构此类专业的设置与布局,以期为大陆食品本科教育的改革与完善提供参考。     

An exploration of important factors in the decision-making process undertaken by foundation degree students with respect to level 6 progression

Deciding what degree to study and where are very important decisions to make for a range of practical and economic reasons, and much research has been undertaken in this area. What has not been considered previously is the decision-making processes of students who have completed an associate degree, such as a Higher National Diploma or Foundation Degree, and are now considering where to complete their Bachelor education. Associate degrees are often provided by further education colleges (FECs) in partnership with universities, and the choices available to college-based higher education students are whether to continue at the college or move to university. A mixed-methods approach was adopted comprising of an online questionnaire and subsequent focus groups of students studying at HE at a southwest FEC. The findings showed that equal importance is placed on the practical issues of proximity and familiarity as on course suitability, with the only differences between those remaining at college and those moving to university being financially based.     

福建省高等教育与经济增长的协调度研究

本文从福建省高等教育和经济增长的现状入手,利用复合系统整体协调度原理,研究测算1994-2004年福建省高等教育与经济增长之间的协调度,揭示两者之间的协调度较低但基本呈现出逐年提高的态势,并探讨了相应的政策建议。     

我国学位授权审核的历程与动因分析

我国十次学位授权审核的历程、指导意见及相关数据显示,国家经济建设和社会发展需求是学位授权审核工作的基本动因,学位授权审核改革与高等教育规模紧密相关,学位授权审核工作在波浪式递进过程中不断向探索和完善中国特色的学位授权制度的方向发展。