Extraction is the separation of a substance from the mixture, with the distribution of a solute between two solvents which can not be mixed to fetch solute from one solvent to another solvent. The purpose of this study was to determine the antioxidant activity found in betel leaf extract for coconut oil numbers peroxide analysis, antioxidant resistance, with Lovibond color test and to found variations in betel leaf types that produce the optimum operating conditions of antioxidants. In this study, green and red betel leaves extracted by using ethanol solvent, the extract is added to coconut oil and then tested peroxide number and color levels. The results obtained in this study were able to lower the number of betel leaves peroxide by 55.13% with the best optimum condition; volume of 150 ml of solvent, extraction time of 75 minutes, and stirring speed of 300 rpm for the raw material powder of red betel leaf.
This classroom action research entitled Application of the Quantum Teaching Model to Improve Class VIII Poetry Reading Skills of SMP Negeri 1 Mesuji OKI involved 27 grade VIII students. This research was conducted for two cycles with a span of three weeks per cycle. Based on the results of the analysis of teacher observation data, it is known that the level of teacher competence in teaching is very good, namely, 3.88 in the first cycle and 4 in the second cycle. The percentage of students' observation scores also experienced a very significant increase, if in the first cycle it only touched 51.85%, but in the second cycle, it became 77.77%. The results of students' poetry reading scores also increased very well. In the first cycle, the percentage of success only reached 46.42% but increased to 100% in the second cycle.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.