新理念在强化学生主体意识中的实践     

朱祖建 《宁德师专学报(自然科学版)》2006,18(1):110-112

坚持学生为主体是现代教育思想的核心.面向全体学生提高学生学科素养,倡导探究性学习是生物课程新理念.课程内容与生活和时代的联系,是课程改革的主要目标之一.中学生物课堂教学,注重与学生的生活经验结合,同时加强情商培养,促使新知识、新概念的形成建立在学生现实生活的基础上、切实反映学生生活经验、体现时代特点和精神的教学,将会有效地改变学生的学习与生活和现实世界相脱节的状况,能极大地调动学生学习生物学的主动性和积极性,从而提高生物学的教学质量,达到新课标确定的教学目标.  相似文献   

Analysis of Korean High School Students' Decision-Making Processes in Solving a Problem Involving Biological Knowledge     

Hong  Jung-Lim  Chang  Nam-Kee 《Research in Science Education》2004,34(1):97-111

In this study, the cognitive characteristics of students' decision-making processes centered on phases, difficulties, and strategies are analysed in the personal dailylife context involving biological knowledge. The subjects were first year science and general high school students in Seoul, Korea; 6 female students and 7 male students. The students' decision-making processes were analysed by think-aloud and participant observation methods. On the whole, the students' decision-making processes progressed in following order: recognizing a problem, searching for alternatives, evaluating the alternatives, and decision. During the decision-making processes, the above phases were repeated by trial and error. Students preferred noncompensatory rules that did not allow trade offs among alternatives for decisions, rather than compensatory rules of selection. Students had a tendency to have difficulties in analysing the difference between initial state and desirable state of the problem, organising biological knowledge-related problems, and clarifying values as selective criteria. Even students who had high achievement and more positive science-related attitudes did not apply biological knowledge to search for alternatives, and could not utilise scientific values as selective criteria very well. We discuss the implications of these results for teaching of decision-making in respect to scientific literacy.  相似文献   

多种形式交叉复习,把分类知识系统化--小议生物课的复习方法     

杨胜鲲 《铜仁学院学报》2003,5(Z1):150-151

在生物课复习中,可引导学生采用单元归类法、纲要网络法、纵横比较法、概念串连法、综合训练法进行复习,以培养他们的综合能力.  相似文献   

睫毛萼凤仙花生态特性的初步研究     

樊梅英  夏日红  曹万友  陈黎 《黄山学院学报》2006,8(5):52-53

睫毛萼凤仙花为一年生植物,3月萌发,5月开花,6月种子成熟,结束一个生长季;喜阴,喜湿,适宜的温度范围窄;生态策略为快速增加型,即投入型策略.  相似文献   

论我国人口增长与经济、社会的可持续发展     

陈莹花 《湘南学院学报》2003,24(6):30-33,37

可持续发展是当今国际社会一种关于经济社会发展的新的战略,其主要内涵是通过人口、资源、环境等的相互平衡,实现经济社会的长期、协调发展。根据我国的实际情况,我们在加强环境保护的同时,必须要长期坚持计划生育的基本国策,控制人口增长的数量,提高人口的质量,减轻过多的人口对环境和资源的压力,以实现我国经济和社会的可持续发展。  相似文献   

论自然选择的双重性在生物入侵中的作用     

汪玉琳 《商洛学院学报》2006,20(4):51-54,81

自然选择及生存竞争是生物演化的根本动力，自然选择的双重性作用在一定程度上决定外来生物入侵的结果．自然环境与入侵生物具有双向选择作用，自然选择对生物入侵既有促进作用也有抑制作用，既有有利选择也有有害选择．外来生物进入新栖息地后，由于自然选择双重作用形成与土著生物间生存竞争，逐渐产生优势特性和较强的选择压力，同时对生境产生重大干扰和改变，土著生物选择性衰败和淘汰，形成生物入侵．在论述自然选择双重性内涵基础上，用自然选择的双重性原理分析了外来生物入侵过程的基本问题，为人类控制和治理生物入侵提供参考．  相似文献   

生物分子的表面增强拉曼散射     

胡国进  余文玉 《江西教育学院学报》2002,23(3):18-22

水溶性蛋白质，二肽和氨基酸的表面增强拉曼散射光谱。在实验条件下银胶溶液，脂类氨基酸，芳香族氨基酸，酷氨酸，脂类氨基酸等的光谱进行对比，发现氨基酸，肽，蛋白南在银表面吸附散射时，截面的拉曼散射增强。  相似文献   

对硝基苯腙基取代丙二酸二乙酯的合成及晶体结构     

李延红  张甜  杨红兵  王建平 《洛阳师范学院学报》2007,26(5):75-77

在冰盐浴条件下,对硝基苯胺重氮盐与丙二酸二乙酯反应,合成了标题化合物C_(13)H_(15)N_3O_7。经IR、~1HNMR、元素分析和X-射线单晶测定,确认了其结构。化合物属单斜晶系,C2/c空间群,晶胞参数:α=14.331(11)■,b=6.847(5)■,c=32.63(3)■,β=98.149(14)°,V=3169(4)■~3,Z=8,D_c=1.364Mg/m~3,μ=0.112 mm~(-1),F (000)=1360,R=0.0783,wR=0.2461。  相似文献   

Synthesis and Biological Evaluation of Novel N-Benzoxazolonyluracils as Protox-Inhibitor     

侯仲轲任叶果  雷满香黄明智宋健  陈立功 《天津大学学报(英文版)》2005,11(1):26-29

Protoporphyrinogen oxidase inhibitor has become the focus research field as herbicides.Seven novel N-benzoxazolonyluracils were obtained by cyclization of 6-aminobenzoxazolone derivatives with ethyl 3-dimethylcarbamoylamido-4,4,4-trifluorocrotonate and then methylation or amination, and the reaction yields were between 59%-86%. The chemical structures of the compounds were identified by Elemental Analysis, MS and ^1H NMR. Biological results indicate that some compounds exhibit excellent control of broadleaf weeds at post-emergence by low dosage 18.75 ga.i/ha, but are not effective for grass weeds below dosage 37.5 ga. i/ha. In addition, these compounds show no damage at high-dosage 150 ga. i/ha to wheat and corn, but are unsafe to dicotyledonous plants such as cole, soybean and sorghum even at lower dosage 18.75 ga. i/ha.  相似文献   

生物学史在课堂教学中的教育价值及其应用     

张建玉 《宁德师专学报(自然科学版)》2007,19(3):325-327

生物学史不仅体现了生命科学知识的形成过程，而且蕴涵着科学家的科学态度、科学精神，对于培养学生的生物学素养和人文素养都具有积极的教育意义．因此如何更好地挖掘生物学史的教育功能并正确运用是生物教学中应该探究的重要课题．  相似文献