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Saprizal Hadisaputra
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Jurnal Pijar MIPA
Published by Universitas Mataram
ISSN : 19071744     EISSN : 24601500     DOI : -
Core Subject : Science, Education,
Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics
Jurnal Pijar MIPA (e-ISSN: 2460-1500 & p-ISSN: 1907-1744) is an open-access scientific periodical journal published by the Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA publishes original articles on current issues and trends in mathematics-science-science education studies. In addition, this journal addresses issues concerning environmental education and environmental science. The journal scopes are: a. Physics and Physics Education b. Chemistry and Chemistry Education c. Biology and Biology Education d. Natural Science and Science Education e. Mathematics and Mathematics Education f. Environmental and Environmental Education
Arjuna Subject : Umum - Umum
Articles 1,179 Documents
 89   90   91   92   93 
Analysis of the Urgency of Material and Main Aspects of the Essential Concept of Natural Science in Kurikulum Merdeka Sapitri, Riska Dia; Susanti, Dian
Jurnal Pijar Mipa Vol. 20 No. 4 (2025): Special Issue
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i4.9241

Abstract

Understanding the urgency of the material and the main aspects of the essential concepts of science is very important in learning. This study aims to analyse the urgency of the material and the main aspects of the essential concept in learning Natural Sciences (IPA) in the Independent Curriculum at the junior high school level. The Independent Curriculum provides flexibility for educators in designing contextual learning that is relevant to the needs of students, so that the selection of essential materials becomes very crucial. This study uses quantitative descriptive analysis with a simple random sampling technique on science teachers in Mataram City. Data was collected through a Likert-scale questionnaire to measure the level of urgency of science materials and the essentiality of aspects of the learning process. The results showed that most of the science materials, such as "Substances and Their Changes", "Life Organization Systems", and "Energy and Its Changes" were categorized as very urgent, with an average score of 3.44. In addition, aspects of the science learning process, such as "science-based problem solving", "science project development", and "science literacy skills", were also considered very essential, with an average score of 3.40. However, there are two materials with a moderate level of urgency, namely "Electricity and Magnetism" and "Human Reproductive System". Meanwhile, only one aspect of learning is considered essential (not very essential), namely "application of science in everyday life". This finding indicates the importance of adjusting the curriculum and learning strategies to ensure optimal achievement of competencies. Recommendations are directed to curriculum developers and educators to focus on materials and aspects of learning that best support students' scientific literacy and 21st-century skills.
Nearpod Integration in Science Learning for Junior High School Students: A Review Ramadhan, Awaludin Pandu; Fibriana, Fidia
Jurnal Pijar Mipa Vol. 20 No. 4 (2025): Special Issue
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i4.9253

Abstract

Learning media represents a significant innovation in educational technology, with Nearpod emerging as a valuable tool for enhancing interactive science education in junior high schools. The current generation of students often experiences boredom during traditional learning methods, necessitating the adoption of engaging platforms like Nearpod to facilitate effective material delivery. This study aims to evaluate the application of Nearpod in teaching energy concepts within junior high school science curricula. Employing a Systematic Literature Review (SLR) methodology guided by the PRISMA protocol, this research involved a comprehensive literature search using the Google Scholar database, supported by the Publish or Perish (PoP) application. Out of 386 identified research papers, 11 met the criteria for detailed analysis. The analysis reveals that the integration of Nearpod in junior high school science education is relatively underexplored, especially in topics such as energy. However, findings indicate that Nearpod is an effective medium for fostering engagement, critical thinking, and learning outcomes. These results encourage science educators to incorporate Nearpod into inquiry-based or project-based learning to support more interactive, student-centered instruction. The review is limited to open-access studies conducted in Indonesia between 2015 and 2025, focusing solely on junior high school science education.
Identification of Key Variables in the Utilization of Medicinal Ethnobotanical in KPHP Limau Unit VII Hulu Sarolangun Lubis, Rizky Febriana Br; Zuhriansah, Alfi Laila; Juramang, Risnayanti R.; Safitri, Ikraeni; Marpaung, Sutan Sahala Muda
Jurnal Pijar Mipa Vol. 20 No. 4 (2025): Special Issue
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i4.8868

Abstract

The ethnobotanical utilization of medicinal plants is an integral part of the local wisdom of the Penguluh Tribe community in KPHP Limau Unit VII Hulu Sarolangun, Jambi. However, the lack of systematic documentation of key variables hampers efforts to preserve and develop this practice. This study aims to identify key variables that play a role in the sustainability of medicinal ethnobotany utilization. The methods used include primary data collection through in-depth interviews with stakeholders, literature reviews, and analysis of relationships between variables using the MICMAC (Matrix of Cross-Impact Multiplication Applied to Classification) approach. The results of the study show that of the 15 variables analyzed, seven main variables, such as regulation, types of medicinal plants, cultivation techniques, sources of knowledge, social roles, conservation efforts, and integration of local and formal learning, have a significant influence on the medicinal ethnobotany utilization system. The regulatory variable is identified as the key factor with the highest impact. The discussion highlights the importance of managing driver and linkage variables to ensure system sustainability. In conclusion, strengthening regulations, conservation of natural resources, and integrating local knowledge with scientific approaches are needed to strengthen medicinal ethnobotany and sustain local communities' welfare.
Application of the Differentiated Learning Model of Independent Curriculum in Improving Learning Outcomes Assirri, Ryya Aulia
Jurnal Pijar Mipa Vol. 20 No. 4 (2025): Special Issue
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i4.9259

Abstract

One important aspect of the Independent Curriculum is differentiated learning, which recognizes individual differences in students and provides learning experiences that are tailored to their needs and interests. This article will analyze the application of differentiated learning models to improve student learning outcomes in essential materials of elementary school science subjects. This research is a quantitative descriptive study, using the method Independent Samples T-Test, consisting of experimental classes and conventional classes to see if there are differences in learning outcomes using a differentiated learning model..Based on the results of the data analysis, a significance value of 0.000 was obtained, because this significance value is much smaller than 0.05, it can be concluded that there is a significant difference between the two groups being compared. These results show that there is a difference in learning outcomes using a differentiated model according to the characteristics of essential material in the Independent Curriculum, namely, the flexibility of learning in the classroom. Differentiated learning is an important strategy in responding to today's educational challenges to meet the unique needs and potential of each student.
Fabrication of Carbon Paste Electrode Modified with Nanobentonite and Nano TiO₂ for Tartrazine Analysis by Cyclic Voltammetry Indah, Rahmalia; Setiarso, Pirim
Jurnal Pijar Mipa Vol. 20 No. 5 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i5.9281

Abstract

Tartrazine is a synthetic dye widely used in food products, and its usage needs to be strictly controlled due to potential adverse health effects. One of the methods employed to analyze tartrazine levels is cyclic voltammetry. This study modified carbon paste electrodes by incorporating bentonite and titanium dioxide (TiO₂) nanoparticles to achieve a low detection limit. This research aimed to investigate the effect of the working electrode composition consisting of carbon, bentonite nanoparticles, TiO₂ nanoparticles, and paraffin on the peak current response in the analysis of tartrazine, as well as to determine optimal measurement conditions, namely composition and pH. Bentonite nanoparticles were synthesized using the sonochemical method, while TiO₂ nanoparticles in the anatase phase were obtained commercially. Material characterization was conducted using Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD). The electrode was optimized with a composition ratio 3:4:1:2 (carbon:nanobentonite: nano TiO₂:paraffin), resulting in a cathodic peak current of -5,43 × 10⁻⁵ A. The optimal conditions for tartrazine detection were found to be at pH 7. This study demonstrates the potential of nanomaterial-modified carbon paste electrodes for developing low-cost, sensitive, and eco-friendly electrochemical sensors, which can be applied to monitor synthetic dyes in food safety control rapidly.
Identification of Chemical Compounds in Black Garlic Extract and Effect on Inhibiting Xanthine Oxidase Enzyme Afifah, Mahrunisa Nur; Herdyastuti, Nuniek
Jurnal Pijar Mipa Vol. 20 No. 5 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i5.9292

Abstract

Xanthine oxidase is an enzyme involved in the catalysis of the oxidation reaction that converts hypoxanthine into xanthine and subsequently into uric acid. Elevated uric acid levels can pose various health risks. Gout treatment can be achieved by inhibiting the activity of the xanthine oxidase enzyme using black garlic. This study aims to identify the chemical compounds in black garlic methanol extract, assess the inhibitory effect of this extract on the xanthine oxidase enzyme using in silico methods, and determine the type of inhibition based on enzyme kinetics. The in silico analysis was conducted to evaluate the binding affinity of flavonoid compounds in black garlic extract with xanthine oxidase. The in vitro analysis tested the inhibition of the xanthine oxidase enzyme by black garlic using the UV-Vis spectrophotometry method at a wavelength of 291.7 nm, based on a decrease in uric acid concentration as an indicator of reduced enzyme activity. The type of inhibition mechanism was determined through enzyme kinetics using the Michaelis-Menten equation, which was transformed into the Lineweaver-Burk equation in a double reciprocal form. Black garlic methanol extract contains 133 chemical compounds, including 22 flavonoid compounds that are thought to inhibit xanthine oxidase. According to in silico studies, quercetin-3-O-malonylglucoside exhibits the lowest binding affinity (-9.2 kcal/mol) with the xanthine oxidase enzyme compared to the xanthine substrate (-5.2 kcal/mol) and allopurinol (-5.3 kcal/mol). Inhibition of the xanthine oxidase enzyme by black garlic demonstrated the highest inhibition of 76.352% at a concentration of 10 ppm of black garlic extract. The inhibition type of the xanthine oxidase enzyme by black garlic methanol extract showed a competitive inhibition mechanism, evidenced by an increase in the KM value from 0.014 to 0.134 without a significant change in the Vmax value. Thus, it can be concluded that black garlic extract has the potential to be a natural inhibitor of the enzyme xanthine oxidase that can be used to treat gout or hyperuricemia.
Identification of Bioactive Compounds in Garlic (Allium sativum L.) with Hypocholesterolemic Potential Qoyimmah, Aprilya Miftachul; Herdyastuti, Nuniek
Jurnal Pijar Mipa Vol. 20 No. 5 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i5.9297

Abstract

Hypercholesterolemia is a major risk factor for cardiovascular disease, the leading cause of death worldwide. Although statins remain the standard treatment, their long-term use is associated with side effects, sparking interest in safer natural alternatives. Garlic (Allium sativum L.) contains bioactive compounds such as organosulfur compounds (e.g., allicin) and flavonoids (e.g., quercetin and kaempferol), which have been shown to have cholesterol-lowering potential. This study aims to identify bioactive compounds in fresh garlic ethanol extract and powder using liquid chromatography-mass spectrometry (LC-MS), and to evaluate their in vitro anticholesterol activity using the Liebermann-Burchard method. The extracts were prepared using 70% ethanol and tested for their ability to lower cholesterol levels. LC-MS analysis revealed 96 compounds in the fresh garlic extract and 110 compounds in the garlic powder extract. Bioactive compounds such as organosulfur compounds and flavonoids were identified among these compounds. Based on their composition percentages, allicin was more abundant in the garlic powder extract, as were flavonoids such as quercetin and kaempferol, particularly in glycosides. In vitro tests showed cholesterol-lowering effects, with EC₅₀ values of 41,349.08 ppm for the fresh extract and 35,462.29 ppm for the powder extract. Garlic powder extract exhibits higher activity. These findings suggest that garlic, particularly powder form, has potential as a natural cholesterol-lowering agent. Further in vivo studies are needed to confirm its efficacy, mechanism of action, and long-term safety.
Changes of Gembili (Dioscorea esculenta) Tuber Flour Characteristics During Fermentation Process with L. plantarum B1765 Starter Culture Prihastina, Adinda Debita; Wikandari, Prima Retno
Jurnal Pijar Mipa Vol. 20 No. 5 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i5.9299

Abstract

Gembili (Dioscorea esculenta) is a plant that contains inulin, which can be degraded into fructooligosaccharides known to have advantages and are widely used as food ingredients. The fermentation process can hydrolyse inulin into FOS, which is known to have better stability for food ingredients. Additionally, fermentation can produce Short-Chain Fatty Acids (SCFAs), improving consumer health and enhancing flavor, resulting in better processed products. The objective of this study was to determine changes in the characteristics of gembili tuber flour, including solubility and color, during the fermentation process, supported by data such as pH, Total Titratable Acid (TTA), and Total Lactic Acid Bacteria (TTA). Gembili tubers were cut into pieces and fermented for 0, 2, 4, and 6 days using a 3% L. plantarum B1765 starter culture and incubated at 37℃. pH measurements were taken using a pH meter, TTA using acid-base titration, total LAB using total plate count, and solubility determined by gravimetric principles. Total LAB, TTA, pH, solubility, and color were mutually correlated during the fermentation process. As more bacteria grew, pH decreased, TTA increased, solubility increased, and color became whiter. Optimal flour results were obtained at a fermentation time of 6 days, where total LAB reached 7.60 x 10⁷, pH was 3.40, TTA was 0.989%, solubility was 51.30%, and the color was the greatest white color. Fermented gembili tuber flour has more water-soluble FOS content and has better stability than inulin in non-fermented gembili flour. In addition, the colour produced from the fermentation process is also whiter than that of fermented gembili flour, which can affect the quality of the product. The FOS content in this flour can provide texture or creaminess, maintain moisture in food products, and lower the freezing point of ice cream. However, further research is still needed to determine the effect of fermentation duration on the degree of polymerisation (DP) of FOS produced during the fermentation process and the addition of fermentation time to improve the flour solubility in water.
Antioxidant Activity and Phytochemical Screening of Ethanol Extract from Ruellia napifera Leaves Efendi, Meilisa Rusdiana Surya; Anisa, Zuffa; Setyaningrum, Dyah; Trisnawati, Ade
Jurnal Pijar Mipa Vol. 20 No. 5 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i5.9300

Abstract

Exploration of the chemical profile and antioxidant properties of ethanol extract derived from Ruellia napifera leaves is very important, considering the usefulness of these leaves for use in natural therapy products. This research investigates the identification of secondary metabolite compounds and the antioxidant activity of ethanol extract from Ruellia napifera leaves. The objectives are to determine the types of secondary metabolite compounds present and to evaluate the antioxidant potential using the DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging method. Ethanol extracts were prepared using the maceration method at durations of 24 hours. Phytochemical tests revealed the presence of flavonoids, alkaloids, saponins, and steroids. Antioxidant activity was measured through IC50 values, indicating the extract’s ability to inhibit 50% of the DPPH radicals. The IC50 values obtained were 10.66 μg/mL. For comparison, vitamin C as a positive control exhibited an IC50 of 2.49 μg/mL. These results suggest that the Gempur Batu leaf extract has strong antioxidant potential. These findings suggest that this extract from Ruellia napifera leaves holds potential for developing natural antioxidant-based therapeutic products or herbal medicine formulations.
Development of Green Chemistry Oriented Student Worksheets with Guided Inquiry Model to Improve Science Literacy Skills on Reaction Rate Material Pratiwi, Karina Rike; Mitarlis, Mitarlis
Jurnal Pijar Mipa Vol. 20 No. 5 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i5.9337

Abstract

Green chemistry plays a crucial role in minimizing the environmental impact of chemical processes, while science literacy equips students with the knowledge and skills to understand a sustainable future. This study aims to describe the feasibility of a Student Worksheet oriented toward green chemistry using a guided inquiry model, deemed suitable for enhancing students’ scientific literacy skills in the reaction rate topic. The research method employed is the Research and Development (R&D) 4D model, which includes define, design, develop, and disseminate stages, limited in this study to the development stage to analyse needs, design, and test the conformity of the learning media. A limited trial was conducted with 30 eleventh-grade students who had previously received instruction on reaction rate and green chemistry at a senior high school in Nganjuk during the 2024/2025 academic year. Data were collected through questionnaires, observations, and tests, then analyzed quantitatively and descriptively using mode, percentage, Guttman scale, Likert scale, and N-Gain test. The results show that the worksheet is valid in terms of content and construct (mode 4, good category), practical based on student responses (97.5%, very good), student activities (96.86%, very good), and implementation (mode 5, very good). The worksheet was also effective in improving scientific literacy, as evidenced by 90% of students achieving a gain score ≥ 0.7 (high category). N-Gain by indicator: context 0.85, knowledge 0.85, and competence 0.88. Based on its validity, practicality, and effectiveness, the developed worksheet is feasible to use as a learning medium.

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