RESUMO
Background: Students learn passively in the lecture format and rely on teachers for knowledge acquisition, making it unsuitable for achieving the higher levels of knowledge. Jigsaw learning encourages collaboration between learners for a deeper understanding of the subject and the facilitator role is relatively limited. Aim and Objectives: The aim of the study was to: 1. Determine the effectiveness of the jigsaw method versus traditional lecture methods for the teaching of Attitude, communication, and ethics (AETCOM) in Phase I MBBS students. 2. To assess the perception of students toward the jigsaw method. Material and Methods: This quasi-experimental study included 104 Phase I MBBS students, who were assigned to the jigsaw group and traditional lecture group. As part of the jigsaw method, 10 parent groups and five expert groups were formed to encourage peer group learning. Validated pre-tests, post-tests, and questionnaires were used in the evaluation. Results: On post-test, both groups scored significantly higher than pre-test, but the scores on pre-test did not differ between them. Post-test scores of the jigsaw group were significantly higher than those of the traditional method group. Jigsaw was rated positively by students for enhancing peer interaction (91%), deeper learning of the subject (90%), and communication skills (89%). Conclusion: The jigsaw method is more effective than the traditional method for the teaching of the AETCOM module to medical undergraduates. It can be used as a helpful tool for teaching communication skills and teamwork by utilizing cooperative learning strategies.
RESUMO
Several species of the genus Hyptis have presented medicinal characteristics and are frequently indicated to treat gastro intestinal infections, gramps and pain, as well as for skin infections. Three harvests were carried out using six H. pectinata accessions, and the following characteristics were evaluated: plant height, canopy diameter, leave length (L) and width (W), L/W relation and dry weight of leaves and stem. The accession SAM006 have presented highest leave dry matter yield when the three harvests were summed. The aqueous leaf extracts of the same six H. pectinata accessions were tested for anti-edematogenic effect using the carrageenin-induced rat paw edema at doses of 200, 400 and 600 mg/kg. The extracts administered orally had a significant anti-edematogenic effect. The dose of 200 mg/kg of accessions SAM004 and SAM005 had a stronger effect reducing the edema by 19.6 percent and 15.4 percent, respectively. Similar results were obtained using higher dosages of the aqueous extract of the accessions SAM002, SAM003 and SAM006. It can be concluded that the accessions SAM004, SAM005 and SAM006 are promising genotypes for a plant breeding program that aims the development of a cultivar with highest leave yielding and anti-edematogenic effect.
RESUMO
Effect of 1,25,50 and 75 nM of okadaic acid (OA) on human lymphocytes from healthy individuals in culture has been investigated. To our surprise, we observed induction of significantly high sister chromatid exchanges (SCEs) at concentrations known to inhibit both protein phosphatase-1 (PP-1) and protein phosphatase -2A (PP-2A). However, 1 nM okadaic acid, known to inhibit PP-2A alone, did not induce this cellular feature/phenotype. This novel preliminary observation lays foundation for investigating further the role of PP-1 inhibition in governing as yet unknown finer controls in the induction of high SCEs, the mechanism for which has eluded answers till date.