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北京林业大学关于硕士研究生学位论文题录、摘要格式的有关规定

研究生院 作者:研究生院 时间:2008-06-10 阅读:

一、硕士学位论文题录

(一)编写格式

硕士学位论文中文题目= 硕士学位论文英文题目[硕士学位论文,中]/硕士生姓名(北京林业大学所在学院全称),导师导师姓名(空一个字符)//毕业年//资助项目名称

文字要求:中文字体:宋体;外文字体:Times New Roman。字号:5

段落要求:1.25倍行距。

(二)编写示例

中国竹节虫异科四属成虫分类及部分卵的初步研究= A Taxonomic Study on the Adults and Eggs in Four Genera of Heteronemiidae in China[硕士学位论文,中]/徐进(北京林业大学资源与环境学院),导师 武三安、陈树椿2008 

林业电子政务系统管理决策分析数据环境建立研究= The Research of Building Data Environment for Decision Analysis in Forestry E-Government[硕士学位论文,中]/张庆文(北京林业大学经济管理学院),导师 王武魁//2008//北京林业大学研究生自选课题基金资助项目

 

区域生态系统健康监测研究––以八仙山自然保护区为例= The Research on Ecosystem Health Monitoring in A Region––Take Baxian Mountain Nature Reserve as A Case[硕士学位论文,中]/池建(北京林业大学资源与环境学院),导师 邓华锋//2008//国家十五科技攻关项目国防科技工业民用专项项目

(三)其他

1、在硕士学位论文中文题目以及英文题目中,对于物理量的符号、生物学中的基因缩写词、属以下(含属)的拉丁学名(属名(第一个字母大写)、种名(全小写))等用斜体;此外,凡是硕士英文题目中的实词,第一个字母应大写;

2、当硕士指导教师为两个或两个以上时,导师与导师姓名之间应用顿号隔开;

3、对于基金项目只注明资助该研究的项目名称,不标项目编号;而且项目名称必须完整、规范(对于北京市和国家级科研项目名称可参照附件);当资助项目为两个或两个以上时,项目与项目之间用顿号隔开。

二、学位论文中英文摘要

(一)编写要求

(1) 学位论文中英文摘要必须在摘要前注明对应中英文学位论文题目

2)学位论文因内容较多,其摘要宜写成报道性摘要,用来反映论文的研究目的、方法、主要结果及结论。篇幅在800字以内,并应准确表达学位论文的核心内容。

(3) 不得简单重复题目中已有的信息。

(4) 应排除本学科领域已成常识的内容;切忌把应在引言中出现的内容写入摘要;一般也不要对论文内容作诠释和评论(尤其是自我评价)

(5) 结构严谨,表达简明,语义确切。摘要先写什么,后写什么,要按逻辑顺序来安排。句子之间要上下连贯,互相呼应。摘要慎用长句,句型力求简单。摘要不分段。

(6) 用第三人称,即主语用“该文……”、“作者……”等第三人称写法。

(7) 使用规范化的名词术语,不用非公知公用的符号和术语。新术语或尚无合适汉文术语的,可用原文或译出后加括号注明原文。

(8) 除了实在无法变通以外,一般不用数学公式和化学结构式,不出现插图、表格。

(9) 不引用参考文献、不标注主题词或关键词、不标注图书分类号。

(10) 缩略语、略称、代号,除了相邻专业的读者也能清楚理解的以外,在首次出现时必须加以说明。

(11) 对于物理量的符号、生物学中的基因缩写词、属以下(含属)的拉丁学名(属名(第一个字母大写)、种名(全小写))等用斜体。

(12) 属于科研保密的内容,需经科技处同意。

 (二)格式示例

硕士学位论文中文题目:毛白杨试管苗耐盐性分析及耐盐植株初选

毛白杨(Populus tomentosa Carr.是我国特有的乡土树种,具有许多优良特性,如适应性强,生长周期短,木材质量高等。然而它在NaCl含量超过0.3%的土壤中不能正常生长。这也是影响毛白杨在我国大面积推广的主要原因之一。在毛白杨原有优良性状的基础上,利用组织培养技术,通过体细胞变异培育耐盐品种是解决抗性造林树种的重要途径。

本文在建立了三倍体毛白杨叶片、愈伤组织高频率分化能力的基础上,以三倍体毛白杨离体苗为材料,通过一步选择程序,对三倍体毛白杨试管苗、叶片分化形成的不定芽、愈伤组织进行耐盐性分析,试验结果发现,在不同浓度NaCl中,试管苗生长、叶片分化和愈伤组织生长都受到了不同程度的抑制作用,但他们在不同浓度的NaCl中敏感性不同,叶片分化不定芽时对NaCl的敏感性比较强烈,NaCl浓度为0.3%时,叶片分化受到了明显的抑制作用,而试管苗和愈伤组织的敏感性次之,它们都能够在0.2-0.4%NaCl浓度下较为正常的地生长,且随着盐浓度的增加生长量还有一定提高。

在分析了它们的耐盐性基础上,以0.2%NaCl为起始浓度,逐级加盐,经有盐无盐多次连续选择,获得由叶片和愈伤组织分化形成的耐NaCl0.35%0.4%的三倍体毛白杨耐盐植株。对叶片分化的耐盐植株进行生理生化指标测定,结果发现,获得的耐盐植株的脯氨酸含量和MDA含量均高于对照,而且随着盐浓度的升高,脯氨酸含量和MDA含量逐渐增加。

另取部分离体叶片进行γ射线辐照处理,试验发现,辐照处理对叶片分化率影响很大,在一定剂量范围内,随着吸收剂量的增加,叶片分化率逐渐提高,吸收剂量为10Gy时分化率最高,叶片分化率为67.11%,是对照的1.5倍。继续提高吸收剂量,分化率增加的幅度逐渐降低;当吸收剂量为30Gy时,分化率低于对照,随着吸收剂量继续升高,其分化率大幅度下降。对辐照处理的叶片分化苗进行耐盐性分析,发现辐照之后形成的植株在盐胁迫下生长高度均比不进行任何处理和直接加盐的两个对照要高,说明辐照处理能够减轻NaCl对苗的伤害,提高苗的耐盐性,促进三倍体毛白杨耐盐植株的筛选。

 

English Title: Analysis of Salt-tolerant Characteristics and Primary Selection of Its Salt-tolerant Variants from Tube Plants of Triploid Populus tomentosa

Populus tomentosa is one of the indigenous tree species which exhibits many excellent characteristics such as broad adaptability to environment, short growth period and high quality wood. But it can’t grow normally when the concentrations of salt attain to 0.3% in soil. That was one of reasons why the distribution of P. tomentosa was confined. Based on the many excellent characteristics of P. tomentosa, selection of salt-tolerant variants was an important method to breed new clones with improved resistance to salt by somatic variation from culture in vitro.

Based on the high differentiating rate of leaves and callus, the salt-tolerant characteristics of shoots, leaves and callus of tube plants from triploid P. tomentosa Carr. were analyzed by one-stepped procedure. Growth of shoots, leaves differentiating and inducing callus were inhibited in the media containing NaCl, but their sensitivities to NaCl were different. Sensitivity of leaf was stronger than the others, there’s no differentiation in the media containing NaCl 0.4%, differentiating rate of leaves in the media containing NaCl 0.3% has obviously change, therefore the media of NaCl 0.3% was the suitable selection media for leaf differentiation.  But sensitivities of plantlet and callus were not stronger than that of leaf, they can grow normally in the media of NaCl 0.4%, growth raised within the media of NaCl 0.4% and sharply declined beyond the range. On the base of analyzing their salt-tolerant characteristics, NaCl 0.2% was thought as the initial concentration, increasing NaCl concentration step by step and more times selection in the salt and non-salt media, Salt-tolerant plants which can endure NaCl 0.35% and 0.4% from leaves differentiating and callus regenerating were obtained. The physiology and biochemistry indexes of the plants from leaf differentiating were measured, the result indicated proline and MDA contents were increasing with NaCl concentration increasing.

Additionally, other leaves were irradiated by γ rays. The result indicated irradiation treatment has strongly affection on leaf differentiation. The differentiating rate raised with irradiation dose increasing within some range, when irradiation dose was 10Gy, differentiating rate was the highest, differentiating rate was 67.11% and was 1.5 times that of the control. Continuing to raise irradiation dose, increasing range of leaf differentiating rate increasingly declined, when irradiation dose was 30Gy, differentiating rate was lower than that of control, irradiation dose was 50 Gy, differentiating rate was 0. And half-deadly dose was defined for differentiating rate, 20 Gy was the optimum irradiation treatment. Plants from leaf differentiating by 20 Gy irradiation treatment were inoculated to the media of NaCl 0.3% and successively cultured three periods, then transferred to non —salt media for one period and once added to the media containing different concentration NaCl. The result indicated plant growth by irradiation treatment in salt stress was higher than the control and directly being added to salt. It showed irradiation can alleviate salt harm on plant. Irradiation can enhance salt-tolerant characteristics and benefit for selection of salt-tolerant variants.

   
 
 
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