高职化学如何培养学生的实验与观察能力

针对高职院校化学实验课教学的特点,以及教师在实验课中应发挥的作用,探索高职化学实验课教学方法.从而提高学生创新思维,培养学生实验观察能力,更好地掌握化学知识与技能,使高职学生在将来能更好地服务于社会.     

化学演示实验教学改革初探

化学演示实验是初中教学中一个重要的教学环节,通过演示实验可以使学生形象直观地学习概念、观察现象、认识规律,而且对学生实验基本操作培养起着直接的示范作用;可以培养学生形成科学的思维方法,掌握科学的研究方法.一、引导学生有目的地观察,积极地思维,培养学生良好的实验素质;二、引导学生主动探索,参与策划,培养学生的实验设计能力:三、引导学生对实验进行延伸和拓展,培养学生掌握科学的研究方法.     

初中化学家庭小实验在教学中的重要作用及方法指导

化学，是一门以实验为基础的自然科学，实验教学在初中化学教学中有极其重要的地位，所起的重要作用，是不可替代的。从多年的化学教学实践中，也充分证实了这一点。学习兴趣的培养，知识的理解应用，都离不开实验教学。从实验主体来分，化学实验可分为演示实验与学生分组实验。     

加强化学课程实验探究教学提高学生科学素养的思考

化学课程教学改革倡导学生主动参与实验探究。教师应当加强实验探究教学,挖掘实验探究点,设计和实施完整的化学探究实验方案,以激发学生学习化学的兴趣,培养学生科学创新意识,提高实验探究能力和自主实验动手能力,从而培养其科学探索精神。     

化学实验教学之我见

化学是一门以实验为基础的学科,化学实验时于激发学生学习化学的兴趣,形成化学概念,巩固和理解化学知识,培养学生观察现象、分析问题、解决问题的能力.初步掌握一些常用的化学实验技能,培养学生实事求是、严肃认真的科学态度和科学方法.可见,化学实验既是化学教学的重要手段,又是学习化学的基本方法,也是激发学生学习化学兴趣的源泉.     

化学实验课程对学生综合素质的培养

本文概述了教师在化学教学中如何运用实验手段培养学生的各种能力,详细阐述了实验在化学教学中的重要性.     

面向21世纪物理化学实验教学的思考与实践

实验教学在培养人才方面有着课堂教学所不可替代的独特作用,是实现素质教育和培养创新人才的重要教学环节.物理化学实验是化学实验的重要分支,是一门独立的基础实验课,是学生学习和研究物理化学的重要手段和途径,在物理化学教学中起着举足轻重的作用.如何为学生创造良好的学习环境,培养学生的创新意识和实践能力,使物理化学实验适应时代发展的要求,成为培养高素质人才的重要环节,是摆在我们每一个从事物理化学实验教学工作者面前的重要课题.     

化学实验教学中培养学生的创新能力

化学实验作为化学教学中最生动、最活跃的组成部分,在培养学生创新能力和实践能力等方面具有独特的功能和作用.因此,我们必须立足化学实验这个基础,努力构建培养学生创新能力的"大厦".     

实验——培养学生学习能力的重要手段

化学是一门以实验为基础的学科.实验教学可以激发学生学习化学的兴趣,帮助学生形成化学概念,获得化学知识和实验技能,培养观察和实验能力,还有助于培养实事求是、严肃认真的科学态度和科学的学习方法.充分认识实验教学在化学教学中的地位和作用,切实采取措施加强实验教学,是提高化学教学质量的重要环节.     

化学教学中的演示实验和随堂实验

化学是一门以实验为基础的学科,化学实验可以分为演示实验、随堂实验、学生实验三大类,在化学教学中起着十分重要的作用.实验不仅可帮助学生形成化学基本概念,理解和巩固化学知识,还能培养学生观察现象、分析问题、解决问题的能力,养成实事求是、严肃认真的科学思维方法.     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.