排序方式： 共有12条查询结果，搜索用时 250 毫秒
1.
P. Riaz 《International Journal of Science Education》2013,35(1):99-101
The development of dynamics concepts is studied longitudinally with two groups, one between ages 12‐14 and the other from 14‐16. Data collected includes performances on APS tasks (for which there is also national data) and performance on Piagetian tasks, with interviews on tasks for selected pupils. Classroom science curriculum data was also obtained. The study can thus discuss the interaction of cognitive development and classroom experience in the development of concepts. This particular paper focuses on the APS tasks. 相似文献
2.
The purpose of the paper is to explore Students' perception of university teaching behaviours in Pakistan. Three hundred and fifty students from the six public sector Pakistani universities returned questionnaires. Assessment framework, learning activities and instructional strategies emerged from factor analysis as common factors. Students' views on five conceptual variables were also analysed: instructional design, active teaching, learning activities, questioning styles; and assessment framework. University teaching in Pakistan was found to be driven by assessment. This is a matter of concern for all stake holders, including the administration of the universities, teachers, students and the Higher Education Commission. A teaching behaviour paradigm shift is required, switching from knowledge-oriented teaching behaviour focused on successful passage through assessment, to teaching behaviour focused upon the development of transferable skills demanded by external markets. 相似文献
3.
Wen-dong WANG Nan-nan ZHANG Warren CHANDA Min LIU Syed Riaz ud DIN Yun-peng DIAO Lei LIU Jing CAO Xiao-li WANG Xing-yun LI An-hong NING Min HUANG Min-tao ZHONG 《Journal of Zhejiang University. Science. B》2018,(5)
目的:探究桑螵蛸脂类提取物的成分及对铜绿假单胞菌的抗菌和抗生物膜作用。创新点:中国传统中药桑螵蛸一直广泛应用于肾病的治疗,在抗菌领域未见报道,本实验首次证明桑螵蛸脂类提取物对铜绿假单胞菌有明显的抗菌和抗生物膜作用。方法:采用气相色谱-质谱联用技术,测定桑螵蛸脂质提取物的化学成分及其相对比例。采用纸片扩散法和琼脂平板稀释法观察桑螵蛸脂类提取物对铜绿假单胞菌的抑菌效应并测定最小抑制浓度(MIC)。采用结晶紫染色法和扫描电镜(SEM)进行抑制生物被膜的试验。结论:桑螵蛸脂类提取物中含有16种化合物,最丰富的成分分别是倍半萜类化合物、单萜和微量芳香族化合物。桑螵蛸脂类提取物对铜绿假单胞菌的MIC为4 mg/ml,对铜绿假单胞菌生物被膜的抑制作用明显。 相似文献
4.
Akhtar Ali Keith J. Topping Riaz H. Tariq 《美中教育评论》2010,7(5):66-77
This paper explores entrepreneurial attributes among the students of The Islamia University of Bahawalpur, a public sector Pakistani university. Multistage sampling was employed to maximize the representation. Five hundred and twenty one master＇s level students from thirty departments returned completed questionnaires. Three factors emerged： self efficacy, efficiency and commitment, and entrepreneurial inclinations. The majority of the students exhibited positive entrepreneurial attributes. However, there was no significant difference between negative and positive entrepreneurial attributes. There was no significant impact of demographic variables such as gender, parental income and profession on entrepreneurial attributes. Impact on practice and policy is discussed. 相似文献
5.
Concentration and temperature dependence of viscosity of uranium solutions in H_2O and 3 mol/L HNO_3
INTRODUCTIONJone-Doleequation(JonesandDole,1929)isbeingusedextensivelyforstudyingion-solventinteractionsfordilutesolutions(Fahim-ud-Dinetal.,1990).Valuesofion-solventinteractioncoef-ficientdependupontheparticularelectrolyte,concentrationofelectrolyte,temperatureandsol-ventunderconsideration(Afzaletal.,1989).Mohi-ud-DinandIsmail(1983)attemptedtode-scribetheconcentrationdependenceofviscosityintermsofanempiricalisothermalequation,Eq.(1),obtainedfromtheVogel-Tammann-Fulcher(VTF)equation(… 相似文献
6.
Riaz Ahmad Mumtaz Alam M. Faisal Siddiqui Absar-ul Hasnain 《Indian journal of clinical biochemistry : IJCB》2008,23(2):181-185
The adjustments and diagnostic significance of polyacrylamide gel electrophoretic (PAGE) profiles of lactate dehydrogenase
isoenzymes (LDH: 1.1.1.27) was evaluated in the sera and pleural fluid of patients with tubercular pyothorax. Sera and pleural
fluid samples were randomly collected from 72 and 18 patients respectively at two different timings; first, when patients
were admitted to the Hospital and second, after an intensive phase of treatment. Sera of 20 healthy individuals served as
control. Our results demonstrate significant differences in sera LDH (sLDH) and pleural fluid LDH (pfLDH) isoenzymes. In patients
the order of LDH isoenzyme in sera and pleural fluid followed: LDH−5>−4>−2>−3>−1 and LDH-5>−4>−3>−2>−1 respectively. The ranking
of activity levels in control was LDH−2>−1>−3>−5>−4. In the second phase of sampling from 31 patients, values of sLDH isoenzymes
showed recovery and resembled profiles of controls. Therefore, the sLDH zymograms of patients can be used as the prognostic
marker, since they tend to reach the normal level during recovery signifying the effect of chemotherapy in hospitalized patients.
Moreover, according to the present findings on LDH-PAGE profiles, the levels of LDH-5 and-4 rise in pyothorax patients significantly
(P<0.05). This elevation along with the rise in total LDH activity may, therefore, be used in the diagnosis and monitoring
of tubercular pyothorax. 相似文献
7.
Shahzad Fakhar Xiu GuoYi Khan Imran Shahbaz Muhammad Riaz Muhammad Usman Abbas Adnan 《Asia Pacific Education Review》2020,21(1):121-141
Asia Pacific Education Review - In the provision of massive open online courses (MOOCs), cloud computing services enable students to synchronize their study materials anywhere, anytime, and using... 相似文献
8.
G. M. Seddon Riaz H. Tariq J. Dos Santos Veiga 《International Journal of Science Education》2013,35(4):409-420
Summaries English The investigation sets out to determine in absolute terms the average level of performance of English and Portuguese students in visualizing how diagrams of molecules should be drawn after performing a rotation, reflection or inversion on the molecule itself. A second aim was to determine the factor structure of these tasks. Both aims were investigated using tests comprising samples of items randomly selected from domains of items which operationally defined each task. The results showed that for the students in both countries, the average level of performance on each of these tests was far from satisfactory. The factor structure separated items corresponding to the rotations, reflections and inversions. Within the categories of items corresponding to rotations and reflections, the students from the two different countries give rise to different patterns of loadings for the three different types of rotations and three different types of reflection. 相似文献
9.
ABSTRACTThe purpose of this research is to highlight the aging and elderly care in Pakistan, a country considered the seventh most populous country in the world with an estimated population of 220 million people (citation, 2017). In 2013, Pakistan signed a MoU with China for 56 billion in US$ to create opportunities for the youngsters, but there was no story of opportunity included for the senior citizens. An attempt has been made to raise awareness of the plight of seniors to the Pakistan Government’s attention; however since there is no formal policy dedicated to elders from the Chinese mega MoU and political instability, only little has been accomplished to better the lives of older adults. Modernization has had a major impact on the life of older Pakistani, and not always a positive effect. This research focuses on the important issues that are making the lives of senior citizens more difficult. The issues include psychological factors, anxiety, physical issues, and environmental issues. The research concludes while many factors are making the lives of senior citizens problematic, seniors are still living a satisfied life because they are not depending on their children or others. Senior citizens demand and desire time with their children and grandchildren. Increases found in elders’ psychological problems are likely correlated with modernization. Unfortunately, the China–Pakistan Economic Corridor (CPEC) and the mega project remain totally for the younger population with no economic prospects for elders to directly benefit. Thus, the question remains what will be the outcome for Pakistani seniors? 相似文献
10.
Adsorption of ruthenium ions on activated charcoal： influence of temperature on the kinetics of the adsorption process 总被引：1，自引：0，他引：1
Qadeer R 《Journal of Zhejiang University. Science. B》2005,6(5):353-356
INTRODUCTION Time dependence study of metal ions adsorptionon solids provides valuable information on the ad-sorption process and its mechanism. Rate of metalions adsorption process is dependent on a number offactors such as agitation of the solution, the state ofmetal ions in solution, concentration of metal ions andtemperature (Benes and Majer, 1980). Temperature isthe parameter generally ignored in most adsorptionstudies (Bangash and Hanif, 1992; Afzal et al., 1993;Atun and Kil… 相似文献