Ensino e aprendizagem de programação tem sido foco de muitas pesquisas, nas quais se pode destacar uma ênfase significativa na questão das dificuldades discentes no entendimento de conceitos relacionados a esse aprendizado. Neste artigo será apresentada a concepção e implementação de um método de ensino baseado no Sistema Personalizado de Ensino, e de uma ferramenta integrada ao AVA Moodle, bem como uma análise de resultados de sua implantação em uma instituição de ensino. Os resultados obtidos, em confronto com o histórico de desempenho na disciplina, são bastante animadores para a continuidade da aplicação dessa metodologia.
RESUMO
Realizou-se um estudo para avaliar o efeito de fontes de luz na micropropagação de morangueiro, com níveis crescentes de BAP no meio de cultivo. Para tanto, inocularamse gemas de brotações da cultivar 'Sabrosa' em meio MS com BAP (0; 0,3; 0,6; 0,9; e 1,
This research work objective was to optimize the micropropagation of potato cultivars through the use of new light sources in the growth rooms. Treatments consisted of three potato cultivars (Asterix, Catucha and Macaca), and five light sources (blue, green and red LEDs; Growlux and white fluorescent lamps). The explants consisted of nodal segments containing one bud, isolated from plantlets grown in vitro. The experimental design was completely randomized arranged in a 3x5 factorial, with eight replications. Each experimental unity consisted of a flask with five explants. Three 28-day consecutive subcultures were carried out in MS semi-solid medium, in growth-room under controlled conditions (temperature = 25+2 ºC; photoperiod = 16 hours; light intensity = 20 µmol m -2 s -1 ). At the end of each subculture, the bud number per plantlet, plantlet length and internode length were evaluated. After the third subculture, the concentrations of carotenoids and a-and b-chlorophylls were also determined. Different micropropagation efficiencies were found among potato cultivars grown in vitro conditions: 'Macaca' was the most and 'Catucha' the least responsive cultivar. The growth room light sources differently affected the potato plantlet development: red and green LEDs were the most and least recommended for plantlet development, based on the results of bud number per plantlet, plantlet length, and leaflet concentrations of a-and b-chlorophylls and carotenoids.
The aim of this research was to evaluate the use of light emitting diodes (LEDs) instead of white fl uorescent lamps as light source and adequate growth-medium sucrose concentration for sugarcane micropropagation (Saccharum offi cinarum L.).Sugarcane (RB 872552 variety)
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