Audio-tutorial approach—A multi-media or an individualized method of instruction?     

Abdul G. Khan 《Research in Science Education》1979,9(1):145-147

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Inter-relationships of aptitude and cognitive achievement measures in an audio-tutorial introductory college biology course     

Abdul G. Khan 《Research in Science Education》1980,10(1):147-150

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Effects of neuromuscular fatigue on perceptual-cognitive skills between genders in the contribution to the knee joint loading during side-stepping tasks     

Abdul Jabbar Khalid  Sujae Ian Harris  Loke Michael  Hamill Joseph  Xingda Qu 《Journal of sports sciences》2015,33(13):1322-1331

This study investigated whether neuromuscular fatigue affects the neuromuscular control of an athlete within a sports context setting and whether these effects were more pronounced in the females. Lower limb joint kinetics of 6 male and 6 female inter-varsity soccer players performing side-stepping tasks in non-fatigue versus fatigue and anticipated versus unanticipated conditions were quantified using 10 Motion Analysis Corporation cameras and a Kistler^? force platform. The Yo-Yo intermittent recovery Level 1 fatigue protocol was employed. Stance foot initial contact and peak forces, and peak joint knee moments of the lower limb were submitted to a 3-way mixed-model repeated measure ANOVA. The results suggested that males tend to elicit significantly higher knee joint loadings when fatigued. In addition, males elicited significantly higher peak proximal tibia anterior/posterior shear force, vertical ground reaction force at initial contact and peak internal rotational moments than females. These findings suggested that males were at greater overall injury risk than females, especially in the sagittal plane. Neuromuscular control-based training programmes/interventions that are designed to reduce the risk of the non-contact ACL injury need to be customised for the different genders.  相似文献   

Ionized Calcium Measurement in Serum and Plasma by Ion Selective Electrodes: Comparison of Measured and Calculated Parameters     

Lena Jafri  Aysha Habib Khan  Saba Azeem 《Indian journal of clinical biochemistry : IJCB》2014,29(3):327-332

To determine the concentration of ionized calcium (iCa) collected in lithium heparin and gel tubes and to correlate the measured iCa with calculated iCa. Anaerobic fasting blood samples were simultaneously collected from healthy laboratory workers in lithium-heparin and gel tubes. iCa, pH, total calcium (CaT), total protein and albumin were measured. Ionized Ca was calculated with albumin and globulin values using an appropriate formula. Mean iCa in gel tubes showed a positive constant bias of 0.08 mmol/L (p < 0.001) when compared to lithium heparin results. The mean pH of blood taken in lithium heparin and gel tubes was non-significant (p = 0.3). Measured iCa poorly correlated with CaT (r = 0.2, p = 0.1) and calculated iCa (r = 0.2, p = 0.2). To evaluate the calcium status direct measurement of iCa must be done rather than using the formulae for iCa determination. In addition serum is recommended as the choice of sample for iCa determination in comparison to plasma samples.  相似文献   

Model-based training of situated skills     

Tariq M Khan  & Keith Brown 《British journal of educational technology : journal of the Council for Educational Technology》2000,31(2):171-179

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Strategies for effective faculty involvement in online activities aimed at promoting critical thinking and deep learning     

Nina Abdul Razzak 《Education and Information Technologies》2016,21(4):881-896

Highly-traditional education systems that mainly offer what is known as direct instruction usually result in graduates with a surface approach to learning rather than a deep one. What is meant by deep-learning is learning that involves critical analysis, the linking of ideas and concepts, creative problem solving, and application (Harvey & Kamvounias, Higher Education Research & Development, 27(1), 31–41, doi: 10.1080/07294360701658716 2008)- all of which prepare graduates for life in the 21st Century. It is precisely this kind of deep learning that the current national educational reform initiatives in Bahrain are trying to promote, in contrast to what has usually been offered historically. Unfortunately, this noble aim is not always achieved and teaching methods need to be examined and developed, since there definitely are a lot of alternatives to stereotype lecturing in academic institutions (Annerstedt, Garza, Huang-DeVoss, Lindh & Rydmark, Journal of the Scholarship of Teaching and Learning, 10(2), 107–127, 2010). One such alternative suggested in this paper is that of increasing faculty involvement with students in online contexts, as a means for promoting critical thinking and deep learning.  相似文献   

Review: Mycorrhizoremediation -- an enhanced form of phytoremediation     

KHAN Abdul G 《Journal of Zhejiang University. Science. B》2006,7(7)

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“Exploring this whole thing of social justice” narrative as a tool for critical sociocultural knowledge development in teacher education     

Saba Khan Vlach  Laura Taylor  Melissa Mosley Wetzel 《Pedagogies: An International Journal》2019,14(1):62-77

Many teacher education programs provide teachers with opportunities to read, write, and discuss critical pedagogy, with the hope that such work will allow them to develop more equitable and just teaching practices. Yet, there often remains a gap between the theoretical discussions of teaching and learning in teacher education classrooms and the pedagogical practice in those teachers’ K-12 classrooms. In this study, we examine how one teacher, Gabriela, used narratives to make connections between her third-grade classroom and the critical concepts she was exploring in a teacher education course. Embedded within an ethnographic case study of an inservice teacher education program, we used a discourse analytic approach to examine both the sociocultural knowledge and the identities Gabriela constructed through narrative as she engaged with issues of language, race, and power within the course. We consider some of the affordances of narrative in this space, including how it allowed Gabriela to integrate her understandings of multiple course topics, to position herself in multiple ways as a teacher, and to disrupt her existing understandings of race and racism in the classroom. This analysis suggests that critically oriented teacher education programs might more intentionally make space for narrative to connect critical theory and pedagogical practice.  相似文献   

New insights on the utilization of ultrasonicated mustard seed cake: chemical composition and antagonistic potential for root-knot nematode,Meloidogyne javanica     

Nadeem  Hera  Malan  Pieter  Khan  Amir  Asif  Mohd  Ahmad Siddiqui  Mansoor  Tuhafeni Angombe  Simon  Ahmad  Faheem 《Journal of Zhejiang University. Science. B》2021,22(7):563-574

This study focused, for the first time, on the effect of ultrasonic features on the extraction efficiency of secondary metabolites in mustard seed cake(MSC). The nematostatic potential of sonicated seed cake was examined against the second-stage juveniles(J2 s) of root-knot nematode, Meloidogyne javanica. The results show that a 35 ppm(parts per million) concentration of a sonicated extract(SE) sample of MSC caused 65% J2 s mortality at 18 h exposure period in vitro. It also significantly suppressed the root-knot index(RKI=0.94) in tomato roots. The lethal concentration values for SE were 51.76, 29.79, and 13.34 ppm,respectively, at 6, 12, and 18 h of the exposure period, and the lethal concentration values for the non-sonicated extract(NSE)sample were 116.95, 76.38, and 55.59 ppm, respectively, at similar exposure time. Sinapine and gluconapin were identified as the major compounds in ultrasonic-assisted MSC. Because of the high extraction efficiency of metabolites in the SE, all treatments of SE were shown to be antagonistic to J2 s. Thus, this study of ultrasonication activity-based profiling of MSC may help generate target-based compounds at a scale relevant to the control of disease caused by nematodes in economic crops.  相似文献   

Variations in cadmium and nitrate co-accumulation among water spinach genotypes and implications for screening safe genotypes for human consumption     

Lin Tang  Wei-jun Luo  Zhen-li He  Hanumanth Kumar Gurajala  Yasir Hamid  Kiran Yasmin Khan  Xiao-e Yang 《Journal of Zhejiang University. Science. B》2018,19(2):147-158

Vegetables are important constituents of the human diet. Heavy metals and nitrate are among the major contaminants of vegetables. Consumption of vegetables and fruits with accumulated heavy metals and nitrate has the potential to damage different body organs leading to unwanted effects. Breeding vegetables with low heavy metal and nitrate contaminants is a cost-effective approach. We investigated 38 water spinach genotypes for low Cd and nitrate co-accumulation. Four genotypes, i.e. JXDY, GZQL, XGDB, and B888, were found to have low co-accumulation of Cd (<0.71 mg/kg dry weight) and nitrate (<3100 mg/kg fresh weight) in the edible parts when grown in soils with moderate contamination of both Cd (1.10 mg/kg) and nitrate (235.2 mg/kg). These genotypes should be appropriate with minimized risk to humans who consume them. The Cd levels in the edible parts of water spinach were positively correlated with the concentration of Pb or Zn, but Cd, Pb, or Zn was negatively correlated with P concentration. These results indicate that these three heavy metals may be absorbed into the plant in similar proportions or in combination, minimizing the influx to aerial parts. Increasing P fertilizer application rates appears to prevent heavy metal and nitrate translocation to shoot tissues and the edible parts of water spinach on co-contaminated soils.  相似文献