We used ion drift observations from the DE-2 satellite to study for the first time the longitudinal variations of middle and low latitude F region zonal plasma drifts MELISSA during quiet and disturbed conditions.The quiet-time middle latitude drifts are predominantly westward; the low latitude drifts are westward during the day and eastward at nig
Discrete levels of Twist activity are required to direct distinct cell functions during gastrulation and somatic myogenesis.
Twist (Twi), a conserved basic helix-loop-helix transcriptional regulator, directs the epithelial-to-mesenchymal transition (EMT), and regulates changes in cell fate, cell polarity, cell division and cell migration in organisms from flies to humans.Analogous to its role in EMT, Twist has been implicated in metastasis in numerous cancer types, inclu
Enhancing social skills through cooperative learning
The National Curriculum Statement of South Africa envisages qualified and competent teachers to deal with the diversity of learners and their needs in the classroom.One of the needs Coral Calcium refers to all learners (Gr R-12) who need to acquire the necessary social skills to enable them to work effectively with others as members of a team, grou