79 new cyclopeptides discovered from 28 plants     

A key innovative research result has been achieved in systematic chemistry of plant cyclopeptides 《中国科学院院刊(英文版)》2007,21(4):200

A key innovative research result has been achieved in systematic chemistry of plant cyclopeptides (PCPs), a group of important plant metabolites, by a research team with the CAS Kunming Institute of Botany (KIB)in the capital of southwest China's Yunnan Province. According to a recent announcement released by the Institute, its chemists have brought to light 79 new PCPs.  相似文献   

建设师的汽车作品设计     

JessieScanlon JohnB.Carnet 《科技新时代》2004,(10):80-86

他的建筑作品采用独特的缠绕式结构．风格飘逸。如果他用这种理念来设计一种全新的概念车．那将会是什么样呢？  相似文献   

Approaching usability: a study of an academic health sciences library web site   总被引：1，自引：0，他引：1  

Ascher MT  Lougee-Heimer H  Cunningham DJ 《Medical reference services quarterly》2007,26(2):37-53

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信息通信技术用户的类型     

John  B.  Horrigan  叶兰 《图书情报工作动态》2007,(9):17-20

1调查结果概要 ·8％的美国人是参与性网络及移动设备的深度使用者。 ·另外23％的美国人是务实技术的接受者——他们使用高科技工具紧跟社会网络并有效率的工作。  相似文献   

未来的新兴职业     

Qalili.cin  凋泌  许阳  曼龄  张远行  成晨  林爱珍  乐逍遥 《当代学生》2007,(12)

现代社会,很多人对"理财"趋之若鹜,却认识不到合理分配时间的重要性。君不见成天忙得焦头烂额者,比比皆是!我乃一名职业时间分配师。专门提供最佳的时间分配方案。谁聘请我,谁就将拥有活力充沛的身体、直线飙升的事业、游刃有余的生活!  相似文献   

On language, education, and cochlear implants     

Marschark M  Archbold S  Grimes M  O'Donoghue G 《Journal of deaf studies and deaf education》2007,12(3):257

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Obituary: Bernard Theodoor Marie Tervoort: May 29, 1920,Groesbeek, the Netherlands--August 17, 2006, Bussum, the Netherlands     

Knoors H 《Journal of deaf studies and deaf education》2007,12(2):242

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Genetic analysis for brix weight per stool and its component traits in sugarcane （Saccharum officinarum）     

Liu GF  Zhou HK  Hu H  Zhu ZH  Hayat Y  Xu HM  Yang J 《Journal of Zhejiang University. Science. B》2007,8(12):860-866

Brix weight per stool (BW) of sugarcane is a complex trait, which is the final product of a combination of many components. Diallel cross experiments were conducted during a period of two years for BW and its five component traits, including stalk diameter (SD), stalk length (SL), stalk number (SN), stalk weight (SW), and brix scale (BS) of sugarcane. Phenotypic data of all the six traits were analyzed by mixed linear model and their phenotype variances were portioned into additive (A),dominance (D), additive×environment interaction (AE) and dominance×environment interaction (DE) effects, and the correlations of A, D, AE and DE effects between BW and its components were estimated. Conditional analysis was employed to investigate the contribution of the components traits to the variances of A, D, AE and DE effects of BW. It was observed that the heritabilities of BW were significantly attributed to A, D and DE by 23.9%, 30.9% and 28.5%, respectively. The variance of A effect for BW was significantly affected by SL, SN and BS by 25.3%, 93.7% and 17.4%, respectively. The variances of D and DE effects for BW were also significantly influenced by all the five components by 5.1%～85.5%. These determinants might be helpful in sugarcane breeding and provide valuable information for multiple-trait improvement of BW.  相似文献   

What good is a scientist in the classroom? Participant outcomes and program design features for a short-duration science outreach intervention in K-12 classrooms     

Laursen S  Liston C  Thiry H  Graf J 《CBE life sciences education》2007,6(1):49-64

Many short-duration science outreach interventions have important societal goals of raising science literacy and increasing the size and diversity of the science workforce. Yet, these long-term outcomes are inherently challenging to evaluate. We present findings from a qualitative research study of an inquiry-based, life science outreach program to K-12 classrooms that is typical in design and excellent in execution. By considering this program as a best case of a common outreach model, the "scientist in the classroom," the study examines what benefits may be realized for each participant group and how they are achieved. We find that K-12 students are engaged in authentic, hands-on activities that generate interest in science and new views of science and scientists. Teachers learn new science content and new ways to teach it, and value collegial support of their professional work. Graduate student scientists, who are the program presenters, gain teaching and other skills, greater understanding of education and diversity issues, confidence and intrinsic satisfaction, and career benefits. A few negative outcomes also are described. Program elements that lead to these benefits are identified both from the research findings and from insights of the program developer on program design and implementation choices.  相似文献   

Fragile but real: children's capacity to use newly acquired words to convey preverbal memories     

Morris G  Baker-Ward L 《Child development》2007,78(2):448-458

There is ongoing debate about children's ability to use subsequently acquired language to describe preverbal experiences. This issue was addressed experimentally in this investigation using a novel paradigm. Two-year-old children who lacked color words were individually taught to activate a bubble machine by selecting a particular color of bubble solution. The children then participated in weekly, experimenter-provided activities that fostered their acquisition of the color labels. After 2 months, their ability to apply the newly acquired words in reporting the original event was assessed. A significant proportion of the children demonstrated verbal recall when prompted in the presence of physical reminders of the event. These findings indicate that some early, preverbal memories are translated into words at a later time.  相似文献