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All Journal Berkala Ilmiah Pendidikan Fisika Jurnal Penelitian Pendidikan IPA (JPPIPA)
Rohmatin, Iza Alfi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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Pengaruh Konsentrasi Ekstrak Biji Kakao Terhadap Diameter Zona Bening Pada Bakteri Streptococcus Mutans Rohmatin, Iza Alfi; Suparno, Suparno
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.4703

Abstract

Cocoa beans can inhibit the growth of pathogenic bacteria such as Streptococcus Mutans. Utilization of cocoa bean extract as an anti-bacterial inhibitor containing chemical compounds extracted in simplicia aims to increase the content in the form of alkaloids, flavonoids, tannins, saponins and polyphenols. Streptococcus Mutans is a gram-positive facultative anaerobic coccus that is usually found in the human oral cavity and one of the causes of tooth decay or cariogenic bacteria capable of creating an acidic atmosphere in the mouth and can metabolize carbohydrates. This paper describes the effect of the concentration of cocoa bean extract on the diameter of the clear zone of Streptococcus Mutans bacteria. The antibacterial test was carried out using the Mueller Hinton Agar (MHA) method, samples of cocoa bean extraction were prepared by maceration method with varying concentrations of 2.5% to 12.5% ​​at 2.5% intervals. With an interval of three hours, measurements were carried out for 48 hours of observation. The results showed that the greater the concentration of cocoa bean extract, the larger the diameter of the clear zone, with the smallest diameter (8.44 ± 1.61) mm (for a concentration of 2.5%) and the largest diameter (9.70 ± 1.66) mm (for a concentration of 12.5%).
Development of E-Module based on Flipbook Learning Model Problem Based Learning (PBL) to Improve Critical Thinking Ability Rohmatin, Iza Alfi; Racmayani, Arimbi; Jumadi, Jumadi
Berkala Ilmiah Pendidikan Fisika Vol 10, No 3 (2022): OCTOBER 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bipf.v10i3.13655

Abstract

This paper aims to develop a flipbook-based physics e-module to determine students' critical thinking skills by applying the problem-based learning (PBL) model. The method in the 4-D model research is qualitative descriptive. The research using a non-probability sampling technique that is selected is subject class 10 MIPA MAN 4 Bantul. Techniques for collecting data with test instruments and indicators are used in critical thinking, namely analyzing facts, formulating problems, selecting, clarifying and evaluating arguments logically, and drawing conclusions. The media and material analysis results show that the category is feasible, with a percentage of 85.43 and 75.41. The E-Module shows the average response in education suitable for use on critical thinking skills. The normality value of the control class is 0.002, and the experimental class 0.156. The homogeneity of the statistical significance level is 0.304. Therefore, the data has met the requirements to be tested using an independent test; there is a significant difference between the control class with lectures and experiments using e-modules.
Co-Authors Jumadi Jumadi Racmayani, Arimbi Suparno Suparno