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Cloning(克隆,无性繁殖)took a giantleap(飞跃)from science fiction to sciencefaet last year when researchers at the RoslynInstitute in Scotland announced the birth ofDolly,a lamb cloned from the ceils of anadult sheep.The achievement raised vastquestions about the potential(可能性)ofcloning:Could the feat(技艺)be repeatedand made more efficient?Could other animalsbe cloned?Some skeptics(怀疑论者)even 相似文献
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We present a science centre established in Genoa on an agreement between Municipality of Genoa and Department of Physics of University of Genoa. The aim is to offer children, young people and community an opportunity to approach science in a playful way. The centre staffs guide the visitors through the exhibits, attracting their interests towards the most amusing aspects of the phenomena. According to the principles of constructivism, kids and children are encouraged to handle objects, play with geometrical shapes, observe materials collected from natural and human environment and make ＂discoveries＂, and students can take advantage of the visit and from the exhibits to study in depth a specific topic afterwards in their class, thus preventing the aridity of a purely formal presentation of the discipline, while a general public can realize how much science affects people＇s lives, enjoy its fun aspects and meet scientists during special events. 相似文献
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Cloning 总被引：3，自引：0，他引：3
As we come near to the 21st century, it isclear than ever that science and technology arechanging the way we live and work. Thebreakthroughs in bioengineering science arehelping to uncover the mysteries of life, holdingout new hope for life-saving cures to some of ourgreatly terrible diseases. In 1997, the great news shocked the wholeworld that the British scientists made a lamb,named Dolly from a single cell. Surprisingly, thecell had been taken from the udder of an adult 相似文献
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What is the essence of translating activities?Up to now,many scholars or translators have conducted this study.This thesis aims to study the essence of translating activities from a new perspective—Marxism’s Practice Viewpoint.Translating is a kind of language activity of reproduction,using another language to retell the content of the original accurately and completely.The author also makes his comments on the debate as to whether translating is a science or an art.The conclusion is that translating is neither an art nor a science.It is an activity marked by artistic creativity and scientific creativity,a scientific and artistic unity. 相似文献
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Mun Fie Tsoi Ngoh Khang Goh 《美中教育评论》2008,5(7):29-35
The development of e-learning materials for teaching and learning often needs to be guided by appropriate educational theories or models. As such, this paper provides alternative e-learning design pedagogy, the TSOI Hybrid Learning Model as a pedagogic model for the design of e-learning cognitively in science and chemistry education. This model is hybridized from the Piagetian science learning cycle model and the Kolb＇s experiential learning cycle. The TSOI Hybrid Learning Model represents learning as a cyclical cognitive process of four phases： translating, sculpting, operationalizing and integrating. A major feature is to promote cognitive processing in the learner for active learning proceeding from inductive to deductive. Design specificity in science and chemistry education is illustrated in terms of instructional storyboarding for the developed research-based e-learning product. Learners＇ cognitive ability for example positive concept achievement will be addressed as part of the research data collected. 相似文献
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In the late 18th century and the beginning of 19th century,there appeared an important literary trend named Gothic as a part of Romanism.Mary Wollstonecraft Godwin Shelley(1797-1851) is a famous novelist of the Romantic period.Her masterpiece,Franken stein,is considered one of the best Gothic novels as well as the first science fiction in the modern sense.My thesis is engaged in the study of this work from psychological perspectives:that is the fear of desolation and irrational human ambition.Frankenstein not only adopted the traditional Gothic elements but also modified and added new ones.Thus it yields a great influence on the successive literature. 相似文献
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The paper aims both to foster and to assess ＂school scientific argumentation＂ among secondary science teachers during their pre-service education. For these purposes, the paper uses the recta-scientific construct of＂theoretical model＂ （proposed by the so-called semantic view of scientific theories from contemporary philosophy of science） in three different and complementary conceptual levels. Firstly, the paper suggests teachers to argue using theoretical models （as opposed to propositional items） from science as a key component of their arguments. Secondly, the paper tries to scaffold teachers＇ argumentation practices modeling them with paradigmatic exemplars （which the author calls ＂epitomes＂）. And thirdly, the paper uses a four-component model of school scientific argumentation as an analytical tool to inspect how science teachers argue. The teachers＇ argumentative texts that are discussed in the paper arise from their participation in teaching-learning sequences designed to improve their argumentation skills via three synergic model-based operations： analyzing epitomes of arguments, （co-）constructing new arguments, and meta-theoretically reflecting upon them. 相似文献
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A novel technique of three-dimensional reconstruction segmentation and analysis for sliced images of biological tissues 总被引：5，自引：0，他引：5
INTRODUCTION The past decades witnessed unprecedented ad-vances in the imaging science fields(Yelbuz et al.,2002;Campagnola et al.,2002;Sharpe et al.,2002).The technique of3D image reconstruction andanalysis plays a significant role in the basic researchof life science,which developed from2D imageprocessing but provides more information than2Dimage,and has rapidly expanded to molecular andcellular field(Guo et al.,1995;Trehan et al.,2003).Despite the rapid development of the new field,… 相似文献
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TURAL DINCER Gvner AKDENIZ Ali Rlza 《美中教育评论》2008,5(12):54-59
There are many factors influence the level of students＇ achievement in education. Studies show that one of these factors is ＂learning approach of a student＂. Research findings generally have identified two approaches of learning： deep and surface. When a student uses the deep approach, he/she has an intrinsic interest in subject matter and is interested in ideas and conclusions to understand the subject matter. When a student employs the surface approach, he/she merely memorizes knowledge to pass any exam in school. The aim of this study is to determine learning approaches of science student teachers and to examine the relationships among the variables, such as level of students＇ class and gender. The sample of this study consists of 108 student teachers from the Science Education Program at Department of Primary Science Education in Karadeniz Technical University. Approaches to learning of science student teachers are assessed using the Revised Two-factor Study Process Questionnaire （R-SPQ-2F）, a scale developed by Biggs, et al （2001） consisting of 20 items on a 5 point Likert Scale. According to findings, science student teachers generally have deep learning approaches. Moreover, learning approaches of science student teachers have not changed related to gender. 相似文献
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Yanfang Yang Fang Feng Qingqing Zhou Fangkun Zhao Renpeng Du Zhijiang Zhou Ye Han 《天津大学学报(英文版)》2019,(2)
A strain with high production of exopolysaccharide(EPS) was isolated from dried milk cake(a traditional fermented food from Inner Mongolia). The strain was called N21 and later identified as Leuconostoc citreum( Leu. citreum). The strain was cultured in Man-Rogosa-Sharpe medium containing 50 g/L of sucrose for 48 h at 30 °C and the EPS purified, with a yield of 24.5 g/L. An average molecular weight of 6.07 × 10~6 g/mol was determined by high-performance size-exclusion chromatography. The structure of the purified EPS was investigated through gas chromatography, ~1H and ~(13)C nuclear magnetic resonance spectroscopy, and Fourier transform infrared spectroscopy. The results demonstrated a polysaccharide composed of D-glucopyranose units in a linear chain with consecutive α(1 → 6) linkages. No branching was found in the structure of the exopolysaccharide. The purified EPS showed high water solubility and emulsibility. Based on the thermogravimetric curve, the degradation temperature of the EPS was 308.47 °C, which suggested that the dextran in the study exhibited high thermal stability. The results indicated that Leu. citreum N21 could be widely used to produce linear EPS and that the EPS has potential applications in food science and processing as a food additive. 相似文献
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Science and technology has always been the theme of television series.Different from many representations in conven tional television series,Black Mirror,a British television mini series,satirizes the relationship between people and science and tech nology.Meanwhile,it represents a paradoxical emotional appeal based on the relationship. 相似文献
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《上海大学学报(英文版)》2005,9(1):F003-F003
Journal of Shanghai University is a comprehensive academic journal of science and technology sponsored by Shanghai University. The goal is to provide a forum for the exchange of research findings and academic.views in basic and applied sciences and technological disciplines. Contributions from members of Shanghai University as well as researchers of other institutions are sincerely welcome. 相似文献
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Discourse coherence has been paid much attention since 1960 s. With the development of cognitive linguistics and cognitive science,the research of discourse coherence from cognitive perspective has obtained extraordinary results. Metaphor and metonymy in cognitive linguistics has been used to explain discourse coherence. This paper first gives a literature review of discourse coherence from cognitive perspective,then special attention has been paid to discourse coherence and metaphor and metonymy from cognitive level. 相似文献
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The study on Traditional Chinese Medicine (TCM)by the technology and method of thermal science is a new cut-in point in interdisciplinary science, and its purpose is to study the tongue inspection in TCM from the view of the bio-heat transfer theory. In this paper human tongues were studied with the infrared thermal imaging technology. And the characteristic relationship between temperature distribution and age, tongue color as well as infrared thermal tongue image concerning the characteristic of viscera was analyzed by the experimental data, which confirms that the change in temperature distribution in different positions of the tongue is related to the diseases of different internal organs of the body. From a series of invasive experiments in animals, the blood perfusion rate was measured with the equipment of CBI-8000 Doppler Blood Flow Meter and MP-100 Physiologic Research System for the first time and the characteristic relationship curve between the temperature on the surface of the tongue and the blood perfusion rate was obtained. From the experiments the temperature on the surface of the tongue reflects objectively the tongue color which is influenced by the blood perfusion rate. This will help to develop some new cognition in the theory of TCM. 相似文献
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Khajomsak Buaraphan 《美中教育评论》2011,(2):137-148
Understanding of NOS （nature of science） appears as a prerequisite of a scientifically literate person. Promoting adequate understanding of NOS in pre-service physics teachers is, therefore, an important task of science educators. Before doing that, science educators must have information concerning their pre-service teachers＇ conceptions of NOS. This study used the MOSQ （myths of science questionnaire） to explore 17 pre-service physics teachers＇ conceptions of NOS. Commonly, these pre-service teachers expressed misunderstandings about NOS with respect to： （1） the relationship between theory and law; （2） science as cumulative; （3） subjectivity in science; （4） the scientific method; and （5） the relationship between science and technology. Science educators should consider and utilize these common misunderstandings as a basis of curricular framework for further improving pre-service physics teachers＇ understanding of NOS. 相似文献
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As the Westernization Movement developing in the 1860 s, China began to introduce and learn western science and technology to develop modern military industry and civilian industry. In modern history, Xi’an went through the Xi ’an capital’s industrial embryonic form in the late Qing dynasty and urban industrialization construction during the period of the Republic of China so that it converted gradually from a trade city for Chinese traditional handicrafts under the background of the feudal society to a city in the industrial society where machine were used for production. 相似文献
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The present article approaches some of the educational implications borne by humanity with technological progress We begin by pointing out significant data that classify what is considered relevant. Then, confronting the future is discussed by analyzing the attitudes necessary to promote the goals. Confronted with these challenges, three possible focuses are suggested in accordance to the novel realities issued from science and technology： The first is the revitalization of humanism; The second is, the society of knowledge calls for both ＂radicalism and responsibility＂, which is also a response to our own decisions, without avoiding their consequences nor discharging them in others; The third is, understanding the true and full significance of solidarity. Finally, some approaches and educational suggestions are highlighted allowing parents, professors and students the greatest opportunity for profiting from the limitless resources that science and technology provide us for personal growth. 相似文献
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When you watch an American film or TV play,you may notice thatwhile a policeman is cuffing(给……上手铐)a suspect(嫌疑犯),he issaying something or reading something from a piece of paper to him.What the policeman is saying or reading is called Miranda Rights. Under the Constitution(宪法) of the United States of America,a personaccused(被控告)of a crime has the right to the assistance(援助)of a 相似文献