Genetic linkage map ofBrassica campestris L. using AFLP and RAPD markers     

Lu Gang  Cao Jia-shu  Chen Hang 《浙江大学学报(A卷英文版)》2002,3(5):600-605

A genetic linkage map comprised of 131 loci was constructed with an F₂ population derived from an inter-subspecific cross betweenBrassica campestris L. ssp.chinensis cv. ‘aijiaohuang’ and ssp.rapifera cv. ‘qisihai’. The genetic map included 93 RAPD loci, 36 AFLP loci and 2 morphological loci organized into 10 main linkage groups (LGs) and 2 small groups, covering 1810.9cM with average distance between adjacent markers being approximately 13.8cM. The map is suitable for identification of molecular markers linked to important agronomic traits, QTL analysis, and even for marker-assisted selection in breeding programs of Chinese cabbage and turnip. Project (No. 39870509) supported by the National Natural Science Foundation of China  相似文献   

钢结构井架制作安装接头形式的改进     

左宸  邹成学  卞修良 《淮南职业技术学院学报》2005,5(1):44-46

在制作加工箱形钢结构井架过程中，采用原制作加工工艺和原设计接头形式时，由于加工制作工艺不合理和原设计接头形式很难控制，容易造成箱形钢结构梁的断面对角线几何尺寸和宽度几何尺寸超出国家标准等质量问题，通过对箱形钢结构梁的特性、设计要点、施工工艺的分析，结合机械制造企业本身的特点，采用改进后的加工制作工艺和接头形式，使箱形钢结构梁的质量一次合格率达到了100％，同时大幅度提高组装速度，而且还节约了组对材料，提高了企业的经济效益。  相似文献   

论普通高中的办学特色     

陈胸怀 《基础教育研究》2001,(7):13-14

《中国教育改革和发展纲要》提出:"中小学要由应试教育转向全面提高国民素质的轨道","办出各自的特色".中共中央国务院《关于深化教育改革全面推进素质教育的决定》强调素质教育在不同阶段、不同方面、不同地区有不同特点,这就对普通高中的学校特色提出了迫切要求.  相似文献   

一位领导者的教育情怀——读唐之享《求实集》     

陈达道  廖志坤 《徐特立研究(长沙师范专科学校学报)》2005,(1):13-15

国运兴衰，系于教育。教育之于经济社会发展的重要性不言自明。然而，由于教育在经济社会发展中具有潜隐性，一些同志对教育重要性的认识便难以到位，教育的战略地位在一些地方便难以落实，教育工作中的一些问题也随之而生。对此，唐之享同志在《求实集》中给予了中肯的批评和深入的分析。  相似文献   

两朵带刺的玫瑰--《组织部新来的青年人》与《拖拉机站站长和总农艺师》之比较   总被引：1，自引：0，他引：1  

陈南先 《广东技术师范学院学报》2002,(3):45-50

《组织部新来的青年人》是在《拖拉机站站长和总农艺师》的影响下问世的 ,两篇小说在主题、人物、情节等方面均有相似之处。但作家王蒙不是拙劣地模仿来自苏联的文学作品 ,相反 ,他的作品不少地方还有所超越。总的说来 ,两篇小说各有千秋。  相似文献   

初中生物学教学中的环境教育     

陈京 《生物学教学》2001,26(11):3-5

本文对初中生物学教学中进行环境教育的两个必要环节和可供采用的形式进行了分析与阐述；在分析现行教材的基础上，提出了教材中可渗透、可拓展的相关内容及知识点，并提出了可行的评估方式。  相似文献   

Isolation and identification of Sclerotinia stem rot causal pathogen in Arabidopsis thaliana     

Wang AR  Lin WW  Chen XT  Lu GD  Zhou J  Wang ZH 《Journal of Zhejiang University. Science. B》2008,9(10):818-822

A new stem rot disease is found to occur naturally on Arabidopsis plants in greenhouses of Fuzhou, China. In order to identify its pathogen, we conducted a series of fimgal isolation and purification, plant reinoculation, and ascus and ascospore induction from the sclerotia. The isolate caused typical water-soaked lesions after reinoeulation and produced sclerotia both on Arabidopsis plants and culture medium plates, and the sclerotia could be induced to produce discal apothecia and 8 binucleate ascospores per ascus. These disease symptom and fungal morphology data revealed that the fungus Sclerotinia sclerotiorum (Lib.) de Bary was the pathogen for Arabidopsis stem rot. To confirm this, we further amplified its large subunit ribosomal DNA (LSU rDNA) by polymerase chain reaction (PCR), and compared the sequence with the known LSU rDNA sequences in GenBank. The results show that the sequence shares the highest identities with the LSU rDNAs of different S. sclerotiorum strains. Taking all these data together, we concluded that the fungus that caused the Arabidopsis stem rot is S. sclerotiorum (Lib.) de Bary. This is the first report that Arabidopsis is naturally infected by S. sclerotiorum.  相似文献   

Optimization of conditions for supercritical fluid extraction of flavonoids from hops (Humulus lupulus L.)     

He GQ  Xiong HP  Chen QH  Ruan H  Wang ZY  Traoré L 《Journal of Zhejiang University. Science. B》2005,6(10):999-1004

Waste hops are good sources of flavonoids. Extraction of flavonoids from waste hops (SC-CO₂ extracted hops) using supercritical fluids technology was investigated. Various temperatures, pressures and concentrations of ethanol (modifier) and the ratio (w/w) of solvent to material were tested in this study. The results of single factor and orthogonal experiments showed that at 50°C, 25 MPa, the ratio of solvent to material (50%), ethanol concentration (80%) resulted in maximum extraction yield flavonoids (7.8 mg/g). HPLC-MS analysis of the extracts indicated that flavonoids obtained were xanthohumol, the principal prenylflavonoid in hops. Project (No. Y304203) supported by the Natural Science Foundation of Zhejiang Province, China  相似文献   

学生对教师课堂教学质量评价浅析     

陈虹  张桂芳 《宁德师专学报(自然科学版)》1997,(2)

随着医学技术的迅猛发展，中专卫校应全面提高教学质量才能同社会需求相适应．而学生参与评价教师的课堂教学质量是评价整个教学质量的核心内容，也是教学管理的主要环节．将学生参与评教的资料在微机上进行统计处理，将其结果进行分析讨论，及时与教师反馈，有助于教师了解自己整体教学水平，以及不足之处，为优化教学过程提供科学依据，有利于提高教师课堂教学质量．  相似文献   

Transient response of piles-bridge under horizontal excitation     

朱斌  陈仁朋  陈云敏 《浙江大学学报(A卷英文版)》2003,4(1):28-34

Moving ships and other objects drifting on water often impact a bridge's pile foundation. The mechanical model of the piles-bridge structure under horizontal forcing was established, and a time-domain approach based on Finite-difference Method was developed for analyzing the dynamic response of the piles-bridge structure. For a single pile, good agreement between two computed results validated the present approach. The slenderness ratio of the pile, the pile-soil stiffness ratio and the type of the structure influence the dynamic response of the piles-bridge structure. The computed results showed that the stiffness of the structure determines the dynamic response of the piles-bridge structure under horizontal forcing. Project (No. 001110442) supported by the Science and Technology Bureau of Zhejiang Province, China.  相似文献