Chemical education

Aims of the study: The study has applied the view of differentiated teaching in designing and using the system of differentiated exercises in organic chemistry teaching at high schools in order to develop the problem-solving capacity for high school students in several Mekong Delta provinces.

27p tunelove 10-06-2021 12 3   Download

Study objectives: Study and propose the measures to develop the competence in teaching the experimental for pedagogical chemistry student to increasing the teaching competence and increasing the quality of training chemistry teachers of universities.

27p thebadguys 08-06-2021 41 5   Download

Purpose of research: Construction and use of the system of chemical exercises used in teaching organic chemistry to develop the creative capacity for students in gifted high school, contribute to renovating teaching and learning methods Chemistry in gifted high schools oriented towards capacity development.

27p prisonbreak123 21-05-2021 40 4   Download

Study objectives: Study on theoretical and application basis of Microsoft (MS) Access and Visual Basic for Application (VBA) in creating programs that have applications in general teaching and learning and teaching and learning chemistry in particular.

27p prisonbreak123 21-05-2021 35 4   Download

From the ethanol extract of dried powders of Andrographis paniculata Nees leaves growing in Hung Yen Province, five compounds were isolated and identified: Andrographolide, dodecahexanoic acid, B-sitosterol, a mixture of 14-deoxy-11,12-didehydroandrographolide and 14-deoxyandrographolide (in ratio of 11:5).

7p tamynhan5 10-12-2020 8 2   Download

This study was designed to be a cross-sectional study of 1440 Kinh students and 718 San Diu students from 11 to 17 years of age in Vinh Phuc and Phu Tho Provinces. The study objective was to determine the age of puberty of Kinh and San Diu students in these provinces.

5p tamynhan5 10-12-2020 12 1   Download

Many industries, such as nuclear power plants, chemical industry, oil and gas industry have dangerous working environments and hazardous conditions for employees. Maintenance, inspection and decommissioning activities in these safety-critical areas mean a serious risk, downtime is a significant financial loss.

5p christabelhuynh 29-05-2020 9 0   Download

Bài viết này trình bày tóm tắt các nội dung chính trong các bài giảng của tác giả tại Trường Đại học Sư phạm Thành phố Hồ Chí Minh vào tháng 3 năm 2013. Trong bài này trình bày ý nghĩa của việc lấy người học làm trung tâm, cũng như sự cần thiết của việc thay đổi phương pháp giảng dạy, hướng đến giáo dục có tính chất lượng cao và bền vững trong môn Hóa học.

8p nganga_01 04-09-2015 59 4   Download

This article summarizes the main ideas of our lectures at the Ho Chi Minh City University of Education in March 2013. It is about aspects of chemical education, goals and problems of chemistry teaching in Germany and the importance of a sustainable and meaningful chemical education.

9p nganga_01 04-09-2015 70 5   Download

"Thế nào là một giáo viên Hóa học giỏi?!" Việc giảng bài của giáo viên chính là câu trả lời, hãy nhìn vào dấu chấm than sau câu hỏi (!). Vấn đề nghe có vẻ đơn giản, nhưng trên thực tế câu trả lời là rất khó. Nó phụ thuộc vào thái độ của mỗi cá nhân. Cùng tham khảo bài viết sau đây để hiểu rõ hơn về vấn đề này.

14p nganga_01 04-09-2015 37 4   Download

HOXC13, a homeobox-containing gene, is involved in hair development and human leukemia. The regulatory mechanism that drives HOXC13 expression is mostly unknown. Our studies have demonstrated that HOXC13 is transcriptionally activated by the steroid hormone estrogen (17b-estradiol; E2).

12p vinaphone15 28-02-2013 48 2   Download

Hypoxia and hypoxia-related genes are important factors in articular chon-drocytes during cartilage homeostasis and osteoarthritis. We have investi-gated the various apoptotic factors that show significance in synovial fluid obtained from normal and experimental osteoarthritic animal models and have evaluated the effect of hypoxia on articular chondrocyte apoptosis induced by these apoptotic factors.

11p vinaphone15 28-02-2013 37 2   Download

In the diazotrophKlebsiella pneumoniae, the nitrogen sensory protein GlnK mediates the cellular nitrogen status towards the NifL⁄NifA system that regulates transcription of the nitrogen fixation genes in response to ammo-nium and molecular oxygen.

14p vinaphone15 28-02-2013 47 2   Download

Bacillus subtilishas three active tyrosine kinases, PtkA, PtkB and McsB, which play an important role in the physiology of the bacterium. Genome sequence analysis and biochemical experiments indicated that the ortholog of McsB, BAS0080, is the only active tyrosine kinase present inBacillus anthracis.

11p vinaphone15 28-02-2013 27 2   Download

Cc RNase is the founding member of the recently identified RNasej family, which is represented by a single ortholog in a wide range of animal taxonomic groups. Although the precise biological role of this protein is still unknown, it has been shown that the recombinant proteins isolated so far from the insect Ceratitis capitataand from human exhibit ribonucleo-lytic activity.

11p vinaphone15 28-02-2013 47 3   Download

Thioesters are more reactive than oxoesters, and thioester chemistry is important for the reaction mechanisms of many enzymes, including the members of the thiolase superfamily, which play roles in both degradative and biosynthetic pathways. In the reaction mechanism of the biosynthetic thiolase, the thioester moieties of acetyl-CoA and the acetylated catalytic cysteine react with each other, forming the product acetoacetyl-CoA.

13p vinaphone15 28-02-2013 48 3   Download

Angiotensin-converting enzyme (ACE) and its homologue angiotensin-converting enzyme 2 (ACE2) are critical counter-regulatory enzymes of the renin–angiotensin system, and have been implicated in cardiac function, renal disease, diabetes, atherosclerosis and acute lung injury.

10p vinaphone15 28-02-2013 39 3   Download

EnteropathogenicEscherichia coli(EPEC) has been shown to disrupt the barrier function of host intestinal epithelial tissues through entering tight junctions. However, the mechanism by which this occurs remains poorly understood. In this study, we determined that EPEC invades host cells through tight junctions as it initiates infection.

11p vinaphone15 28-02-2013 36 1   Download

There are two hatching enzyme homologues in the zebrafish genome: zebrafish hatching enzymeZHE1andZHE2. Northern blot and RT-PCR analysis revealed that ZHE1 was mainly expressed in pre-hatching embryos, whereasZHE2was rarely expressed. This was consistent with the results obtained in an experiment conducted at the protein level, which demonstrated that one kind of hatching enzyme, ZHE1, was able to be purified from the hatching liquid.

13p vinaphone15 28-02-2013 53 2   Download

The creatine⁄creatine kinase system decreases drastically in sarcoma. In the present study, an investigation of catalytic activities, western blot and mRNA expression unambiguously demonstrates the prominent expression of the creatine-synthesizing enzymesl-arginine:glycine amidinotransferase andN-guanidinoacetate methyltransferase in sarcoma, Ehrlich ascites carci-noma and Sarcoma 180 cells, whereas both enzymes were virtually unde-tectable in normal muscle.

11p vinaphone15 28-02-2013 34 2   Download