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All Journal ALCHEMY Jurnal Penelitian Kimia Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram AMPLITUDO: Journal of Science & Technology Innovation
Baiq Fara Dwirani Sofia
University of Mataram
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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Identification of Antioxidant Compounds using the DPPH Radical Scavenging Method from Ethanol and Methanol Extracts of the Leaves and Fruits of the Renggak Plant (Ammomum dealbatum R.) Rahmawati Rahmawati; Meliana Meliana; Lestia Furnapasta; Syarifa Wahidah Al Idrus; Baiq Fara Dwirani Sofia; Sya’ban Putra Adiguna; Jono Irawan
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.108082.217-227

Abstract

This study aims to screen antioxidant compounds from the renggak plant (Amomum dealbatum R.). Screening of phytochemicals was carried out on the leaves and peel of the renggak fruit by the extraction method using ethanol and methanol solvents. Extraction was carried out by maceration, and the antioxidant potential test was carried out by measuring the extract's scavenging activity against DPPH radicals. In the fruit peel, both ethanol and methanol extracts tested positive for all phytochemicals, while in the leaves, ethanol extract was positive only for tannins and alkaloids, and methanol extract for flavonoids, saponins, tannins, and alkaloids. The difference in results was caused by differences in solvent polarity. The results of the antioxidant test showed that the leaf extract had an IC₅₀ value of 44.31 µM, while the fruit peel extract had an IC₅₀ value of 144.57 µM. The lower IC₅₀ value in the leaf extract indicates that the bioactive compounds contained therein have higher antioxidant potential than the fruit peel, as they can inhibit 50% of free radical activity at lower concentrations. The results of this study provide additional phytochemical and antioxidant sources from plant sources, for use as raw materials in the pharmaceutical and cosmetic industries.
The Effectiveness of Using Android-Based Mobile Chemistry Learning Media to Increase Students' Interest in Learning Chemistry Muntari Muntari; Baiq Fara Dwirani Sofia; I Nyoman Loka; Ramlawati Ramlawati
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol. 14 No. 2: April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v14i2.19147

Abstract

Chemistry is a subject that students tend to dislike. Student learning outcomes are still low due to the lack of student interest in learning which is caused by the lack of media used for learning both at home and at school. To overcome this deficiency, interesting learning media is needed as a complement to learning resources that students can use anywhere and anytime, one of which is Android-based mobile learning media. The aim of this research is to determine the effectiveness of using Android-based mobile learning chemistry learning media to increase students' interest in learning chemistry on the topic of buffer solutions. This type of research is Quasi Experimental Design in the form of Nonequivalent Control Group Design. The subjects of this research were students of class XI MIPA 1 and XI MIPA 2 at SMAN 3 Mataram, totaling 58 students. Data collection techniques include interviews and questionnaires. The data analysis used was N-gain score analysis as well as normality, homogeneity and t-tests. The research results showed that the N-gain for the experimental class was 0.618 with medium criteria (effective) while the control class obtained 0.299 with low criteria (not effective). Normality and homogeneity tests showed that the N-gain data was normally and homogeneously distributed. The results of the t-test at the 5% significance level were obtained a significance value showing 0,000 < 0,05. These results indicate that the use of mobile learning media is effective in increasing students' interest in learning chemistry on the topic of buffer solutions.
Identification of Learning Independence Levels and Its Corelationship with Students Chemical Learning Outcomes at Covid-19 Era Husnawati Husnawati; I Nyoman Loka; Baiq Fara Dwirani Sofia; Yunita Arian Sani Anwar
AMPLITUDO : Journal of Science and Technology Innovation Vol. 4 No. 2 (2025): August
Publisher : Balai Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56566/amplitudo.v4i2.310

Abstract

The purpose of this research was to determine the level of independence learning, chemical learning outcomes and the correlation between independence learning and chemical learning outcomes during the Covid-19 period in class XI MIPA SMAN 6 Mataram in 2020/2021. This type of research is called correlational research. The population used was all students from class XI MIPA SMAN 6 Mataram in 2020/2021, which consisted of 4 classes totaling 126 students and the sample used was 56 students using the Slovin formula. The sampling technique is proportional random sampling. Data in the form of the level of independence learning were collected using a questionnaire distribution technique, while the learning outcomes data were collected using a documentation technique from the value of chemistry test result. The data analysis technique used is non-parametric statistics using contingency correlation coefficient test. The results showed that the level of independence learning and chemical learning outcomes were categorized as moderate. The results also show a contingency correlation coefficient (C) which is 0.612 and compared to a rtable of 0.266 which shows there is a positive and significant relationship between independence learning and chemical learning outcomes during the Covid-19 period in class XI MIPA SMAN 6 Mataram Years 2020/2021
Co-Authors Husnawati Husnawati I Nyoman loka Jono Irawan Lestia Furnapasta Meliana Meliana Muntari Muntari Rahmawati Rahmawati Ramlawati Ramlawati Syarifa Wahidah Al Idrus Sya’ban Putra Adiguna Yunita Arian Sani Anwar