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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
 114   115   116   117   118 
Analysis of Ammonia (NH₃) Levels in Dug Well Water in Apit Aiq Hamlet, Batulayar Village, Batulayar Subdistrict, West Lombok Regency Hasanah, Uswatun; Yuliansari, Dini; Nurhidayatullah, Nurhidayatullah
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10648

Abstract

Dug well water is a common source of water used by rural communities. However, water pollution can pose risks to both health and the environment, such as contamination by ammonia. The sources of ammonia pollution generally originate from agricultural waste, livestock waste, and domestic household waste. The purpose of this study was to analyze the ammonia concentration and assess the feasibility of dug well water using the UV-Vis spectrophotometry method. The results of this study showed that Well 1 had an ammonia concentration of 0.045 mg/L in the first trial and 0.047 mg/L in the second trial; Well 2 had a consistent ammonia concentration of 0.224 mg/L in both trials; and Well 3 had an ammonia concentration of 0.192 mg/L in the first trial and 0.191 mg/L in the second trial. The findings indicate that Well 1 meets the Class I water quality standard of 0.01 mg/L, whereas Wells 2 and 3 do not meet this standard. However, Well 2 still meets the Class III water quality standard of 0.3 mg/L, and Well 3 meets the Class II standard of 0.2 mg/L, based on Government Regulation No. 22 of 2021. Therefore, only Well 1 is suitable for consumption, while Wells 2 and 3 are not suitable for drinking but may still be used for daily household needs. This condition is likely caused by livestock pens located approximately 11–23 meters from the wells, as well as the disposal of household and domestic waste near the dug wells, which may have seeped into the groundwater and contributed to elevated ammonia levels.
Balinese Local Plants in Regulating Body Weight: A Review Damayanti, Ida Ayu Manik; Megayanti, Sri Dewi; Wulansari, Nadya Treesna
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10650

Abstract

Obesity and overweight have become major global health concerns. In Indonesia, one in five school-aged children is overweight or obese, with increasing rates observed in Bali. Dietary imbalance, sedentary lifestyles, and metabolic dysregulation contribute to abnormal body weight gain. In light of the limitations of synthetic drugs, plant-derived bioactive compounds have attracted attention as safer and multi-target alternatives for regulating body weight. This review aims to synthesise current scientific evidence on the potential of Balinese local plants in regulating body weight, identify their bioactive compounds and underlying mechanisms, and highlight research gaps to guide future nutraceutical development. This systematic review, conducted in accordance with the PRISMA 2020 guidelines, examined literature published between 2020 and 2025 retrieved from PubMed, ScienceDirect, and Google Scholar. The keywords Balinese plants, body weight, obesity, anti-obesity, plant extract, and bioactive compounds, eight studies met the inclusion criteria. The identified Balinese local plants, including Clitoria ternatea, Zingiber cassumunar, Phyllanthus acidus, Murraya paniculata, Hibiscus rosa-sinensis, Elaeocarpus grandiflorus, Tagetes erecta, and Lagerstroemia speciosa, demonstrated significant potential in regulating body weight. Their mechanisms included AMPK activation, inhibition of pancreatic lipase, suppression of adipogenesis, induction of thermogenesis, and modulation of antioxidants. Balinese local plants exhibit multi-pathway potential in regulating body weight through metabolic and physiological modulation.
Augmented Reality-Based Smart Digital Interactive Media to Enhance High School Students Socio-Scientific Reasoning in Chemistry Nababan, Kartyka; Siregar, Dina Mariana; Tarigan, Victor; Purba, Leony Sanga Lamsari; Renta, Renta
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10685

Abstract

The persistent difficulty in connecting abstract chemistry concepts with real-world socio-scientific issues highlights the need for well-designed digital learning innovations. This study aimed to develop and evaluate an Augmented Reality–based Smart Digital Interactive Learning Media (Smart-DIL) to support senior high school students’ socio-scientific reasoning and 21st-century skills. The study employed a Research and Development (R&D) approach, utilising the ADDIE model, which encompasses the stages of Analysis, Design, Development, Implementation, and Evaluation. The evaluation stage involved a limited product try-out in authentic classroom settings to examine the validity, practicality, and effectiveness of the developed media. Data were collected from 72 eleventh-grade science students using the Socio-Scientific Reasoning Test (SSRT), the 21st Century Skills Scale (21CSS), classroom observations, interviews, and analysis of digital learning artifacts. Expert judgment and user response questionnaires were used to assess product feasibility and usability. The results indicate that Smart-Dil demonstrates high validity and practicality, as reflected in expert validation scores and positive responses from teachers and students. Evaluation evidence further shows that the implementation of Smart-Dil is associated with meaningful improvements in students’ socio-scientific reasoning, particularly in analyzing scientific evidence and constructing evidence-based arguments. In addition, positive developments were observed across all dimensions of 21st-century skills, including critical thinking, creativity, collaboration, and communication. These findings support the integration of Augmented Reality technology within a socio-scientific pedagogical framework, as conceptualized in the proposed TPACK–SSI model. The study concludes that Smart-Dil represents a feasible, practical, and effective learning media product that can help bridge abstract chemistry concepts with authentic societal contexts. The results provide important implications for the development of future digital learning media grounded in Research and Development approaches.
Inhibition Zone of Soapnuts Extract (Sapindus rarak) Agains Candida Albicans Kurniawan, Salsabila Yunita; Novitarini, Novitarini
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10720

Abstract

Candida albicans infection is a common health problem in Indonesia and other tropical countries. Synthetic antifungals have been shown to develop resistance against Candida albicans. Therefore, it is necessary to explore potential natural ingredients as alternatives to synthetic antifungals. Soapnut fruit contains secondary metabolites that can inhibit or kill Candida albicans. The purpose of this study was to test the antifungal activity of Soapnuts fruit by examining the inhibition zone. The inhibition zone was tested using the well diffusion method. In this study, Soapnuts extract was used with concentrations of 25%, 50%, 75%, and 100%. The results showed a probability value (p) of 0.008 < 0.05, indicating a significant difference between each concentration of soapnut extract and the inhibition zone diameter of Candida albicans. The best results were shown by the 100% concentration, which produced an average inhibition zone of 27.50 mm, categorized as very strong inhibition. Soapnut fruit extract exhibits a potent inhibitory effect against Candida albicans. This study can serve as a reference in the development of antifungal agents from Soapnuts fruit extract.
Chem Piano Game to Increase Students Motivation and Retention of Learning Outcomes on the Periodic Table of Elements Material Salfiah, Elok Najwa; Lutfi, Achmad
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10733

Abstract

The abstract nature of the Periodic Table of Elements necessitates interactive learning media to improve students’ motivation and learning outcomes. This study aims to determine the effectiveness of the Chem Piano game as a learning medium in enhancing students’ learning motivation, learning outcomes, and retention of learning outcomes related to the Periodic Table of Elements material. The research design employed was a pre-experimental approach using a One-Group pretest-posttest design. Data on students’ learning motivation were analyzed using a Likert scale consisting of positive and negative statements. Chem Piano was categorized as meeting the criteria for good learning motivation if it achieved a score of ≥ 69%. The learning outcome test data were analyzed using descriptive statistics to examine the mean and percentage of achievement, and the Wilcoxon Signed Ranks Test was used to determine the significance of the increase in learning outcomes. The results showed an increase in learning motivation, with a shift in category from low to very high. The Wilcoxon Signed Ranks Test for student learning outcomes yielded a significance value of 0.00 (< 0.05), indicating a statistically significant improvement between the pretest and posttest scores. Furthermore, the retention analysis yielded a very high retention value of 92.3%, indicating that students’ learning retention was stable. Based on the analysis and discussion, it can be concluded that the Chem Piano game is an effective learning medium for enhancing students’ motivation and learning outcomes in chemistry, particularly in relation to the Periodic Table of Elements. Therefore, it is recommended that this medium be used as an alternative instructional tool to enhance students’ motivation and learning outcomes, and that its implementation be further explored with a larger number of students.
The Influence of Using Canva-Based Video Learning Media on Learning Outcomes in Work and Simple Machines Material Kadir, Patricia Sasmita; Supartin, Supartin; Odja, Abdul Haris; Buhungo, Trisnawaty Junus; Samatowa, Lukman; Yunginger, Raghel
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10755

Abstract

The demands of 21st-century learning require the integration of digital and interactive media, as conventional science instruction often fails to optimally engage students and improve learning outcomes. The study aims to investigate the impact of using Canva-based video learning media on students' learning outcomes in the topic "Work and Simple Machines" within the science subject. The use of Canva as a learning tool constitutes a 21st-century educational medium that can provide a more efficient learning experience. It is a learning resource that can be edited and customized according to specific needs. This research is based on the fact that the learning process in schools is still dominated by conventional methods such as lectures and discussions, which results in low student activity and learning motivation. The research design is a one-group pretest-posttest design. The sampling technique used in this study is Cluster Random Sampling. The population of this study consists of students from SMP Negeri 1 Marisa, with the sample tested being class VIII A (n = 30), designated as the experimental class. Meanwhile, the research data were collected using test instruments to determine the level of students' learning achievement. The tests used in this study include prerequisite tests (normality test), hypothesis testing, and n-gain analysis. The results of the hypothesis test indicate that the t-value in all sample classes is greater than the t-table value; thus, H₁ is accepted. Based on the n-gain analysis, a value of 0.68 was obtained in the experimental class, which falls into the high category. The statistical test used in the normality test is the Lilliefors test with a significance level set at 5% (α = 0.05). Therefore, the use of Canva-based video learning media has a significant effect on students' learning outcomes in the material on work and simple machines.
Environmental Impact Assessment of Paving Block Production from Plastic Waste Using the Life Cycle Assessment (LCA) Approach Johari, Harry Irawan
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10775

Abstract

The growing volume of non-commercial plastic waste poses significant environmental challenges while also presenting opportunities for alternative construction materials. This study aims to assess the environmental impacts of producing paving blocks from plastic waste using the Life Cycle Assessment (LCA) approach. A cradle-to-gate system boundary was applied, encompassing five main production stages: sorting, shredding, melting, hydraulic molding, and cooling. Inventory data were collected from daily production activities, with plastic waste inputs ranging from 1.48 to 2.12 tons per day, and paving block outputs of approximately 0.0018 tons per day, along with electricity consumption between 200 and 250 kWh. The results indicate that the extrusion and molding stages contribute most significantly to environmental impacts due to high energy consumption and thermal emissions. Despite the relatively low product output, converting plastic waste into paving blocks contributes to landfill reduction and supports circular economy principles. The study recommends improving energy efficiency and integrating renewable energy sources to further reduce environmental impacts. Overall, the findings demonstrate the potential of plastic waste-based paving blocks as a sustainable innovation for infrastructure development.
The Contribution of Tree Canopies to Microclimate in Urban and Karst Ecosystems in the Special Region of Yogyakarta Isoralla, Isoralla; Djohan, Tjut; Dzaky, Hazsriel Luthfi
Jurnal Pijar Mipa Vol. 20 No. 8 (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.v20i8.10816

Abstract

Canopy trees play an important role in regulating the microclimate in various ecosystems. This research aims to study the contribution of tree canopy to the microclimate in urban ecosystems and karst ecosystems in the Special Region of Yogyakarta. Trees can affect the microclimate around them, in this case, the ambient temperature. Currently, development in Yogyakarta continues to expand, and green open spaces are being increasingly eroded. The reduction of forest cover and green open spaces in Yogyakarta impacts both the macro and micro environments in the region. Therefore, this study examines the contribution of trees to the ecosystem in terms of air temperature at heights of 1 meter and 10 meters above ground level, soil temperature, air humidity, soil moisture, light intensity, pH, and wind speed in urban and karst ecosystems. This research was conducted at the end of the dry season, in mid-September, from 11:00 a.m. to 1:00 p.m. After the data was collected and tabulated into a collective table containing all the raw data, it was then calculated for its mean and standard deviation, and displayed in the form of a histogram. To determine the differences in parameters between each location, a Least Significant Difference (LSD) test was conducted. Based on the research conducted, both in urban and karst ecosystems, the air temperature 10 meters above the ground (the area around the tree canopy) was lower than the air temperature 1 meter above the ground. The difference in air temperature around the canopy and far from the tree canopy reached 4°C (℃ ) to 10°C (℃ ). Overall, the average air temperature in karst ecosystems was higher than in urban ecosystems. This is due to the differences in the shapes and structures of the tree canopies in the two ecosystems. Trees in urban ecosystems have more diverse shapes and are denser than trees in karst ecosystems. This study proves that trees contribute to the microclimate by lowering the temperature.
Preparation and Evaluation of Capsule Shell Films Formulated from Brown Seaweed Alginate (Sargassum crassifolium) El Viera, Baiq Vera; Saepudin, Syumillah; As Saidah, Luthfiyah Irbah
Jurnal Pijar Mipa Vol. 21 No. 1 (2026)
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.v21i1.10824

Abstract

Brown seaweed (Sargassum crassifolium) grows a lot along the coast of Indonesia, especially in the Pangandaran area. Brown seaweed may serve as a viable natural source of sodium alginate, a biopolymer extensively utilized in pharmaceutical dosage forms. Most capsule shells are made of gelatin, but as more people seek alternatives to animal products, alginate-based materials are being explored. This study aimed to extract sodium alginate from Sargassum crassifolium and fabricate capsule-shell films, subsequently evaluating their physicochemical properties. To obtain sodium alginate powder, the extraction process involved the following steps: acid pretreatment, alkaline immersion, sodium carbonate extraction, bleaching, precipitation, and drying. The extracted material had a moisture content of 12% and a yield of 26.21%. FTIR spectroscopy confirmed the structure of the extracted material by showing that its functional groups, such as hydroxyl, carbonyl, C–O–H, and C–O–C, were the same as those of standard sodium alginate. Capsule-shell films were prepared by varying the alginate concentration in the casting volume to 3%, 4%, and 5%. Organoleptic testing showed that all formulations produced films that were slightly brown, opaque, and felt like paper. Tests on thickness and weight showed that films with higher alginate concentrations were thicker and heavier. F3-1 had a thickness value that was closest to what is needed for commercial hard capsules, and F1-2 had a moisture content range that was acceptable for commercial capsule shells. The moisture content of the formulations ranged from 8% to 24%, depending on the temperature, humidity, and length of time they were dried. All formulations produced films that could be used, but F3-1 had the best thickness, and F1-2 had the correct moisture content, supporting their potential application as non-gelatin capsule-shell alternatives.
Effect of Immersion Media on the Swelling Degree of Banana Peel Extract-Based Biofilm Ismail, Muthia Muthmainnah; Setiana, Mira
Jurnal Pijar Mipa Vol. 21 No. 1 (2026)
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.v21i1.10901

Abstract

The waste from banana peels has bioactive chemicals that could be exploited as natural biomaterials for wound dressings. The amount of swelling in a biofilm is one of the most crucial things that impacts how effectively it works for wound care. This is because it changes how much water it can hold and how solid its structure is. The purpose of this study is to determine the impact of immersion media on the swelling of banana peel extract-based biofilms. We mixed banana peel extract with gelatin at 0.1, 0.3, and 0.5 mL to form biofilms. We tested for swelling in distilled water and a 0.9% NaCl solution for 10 to 30 minutes. We calculated out how much the swelling changed by comparing the weights before and after immersion. After that, we looked at the data by finding the average swelling numbers. The findings indicated that biofilms immersed in NaCl solution exhibited greater swelling than those immersed in pure water. This means that ionic interactions affect how polymer networks grow. The biofilm with 0.3 mL of extract swelled the most, although greater concentrations of extract made the swelling more controllable. These findings indicate that the concentration of the extract and the nature of the immersion medium significantly influence the swelling behavior of banana peel extract-based biofilms. This work provides scientists with insights into enhancing natural biofilm compositions for use as stable and absorbent, eco-friendly wound dressings.

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