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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 
Development of Project-Based Learning Student Activity Sheets to Improve Scientific Literacy Skills on Green Chemistry Materials Maimun, Rozanah; Mitarlis, Mitarlis
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.v20i8.10942

Abstract

The demands of 21st-century science education emphasize the development of scientific literacy and sustainability awareness, necessitating the integration of Project-Based Learning and green chemistry–oriented learning materials. This research aims to develop Student Activity Sheets (SAS) based on Project-Based Learning (PBL) to enhance students’ scientific literacy skills related to green chemistry materials. The research method used is Research and Development (R&D) with the 4D model (Define, Design, Develop, Disseminate) limited to the develop stage. The research subjects were 32 grade XI students at MA Unggul Sabira-IIBS Mojokerto. The validity of SAS was assessed by two chemistry lecturers and one chemistry teacher, yielding a validity mode score of 5, indicating very valid criteria. The practicality of SAS was measured through student response questionnaires, obtaining 96.52% (very practical), learning implementation observation with mode 5 (very good), and student activity observation with mode 5 (very good). The effectiveness of SAS was measured through a pretest-posttest of scientific literacy skills with an average N-gain of 0.83 (high category). The results showed that 90% of students experienced significant improvement, with an N-gain of 0.7 or greater. The SAS developed contains three projects: eco-enzyme as organic fertilizer, cloth pads, and natural room fresheners from lime and coffee, all integrated with green chemistry principles and scientific literacy domains. Thus, the SAS based on PjBL is feasible (valid, practical, and effective) for improving students' scientific literacy skills in green chemistry materials.
Analysis of the Biological Quality of Clean Water in the Taha Quran Education Park Abdullah, Taufik; Azwaruddin, Azwaruddin; Wahyuningsih, Sri
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.v20i8.10988

Abstract

Clean water is a source of basic needs for all forms of life. Water quality must be ensured before use, and water sources must be monitored regularly. The use of unclean water is one of the causes of skin diseases. Various age groups can be affected by skin diseases, especially the age group of children, who are still vulnerable. The purpose of this study was to determine the quality of clean water in the Taha Qur'an Education Park, which was reviewed biologically. This type of research is Descriptive Qualitative. The population in this study were all the water taps in the Taha Qur'an Education Park. The selection of all samples as a population was due to the fact that there were only two water taps at the Taha Quranic Education Park. Based on the results of biological quality tests, including Coliform tests and Escherichia Coli tests obtained in water, it is known that the results of the coliform test obtained in sample A were 10 MPN / 100ml and in sample B 168MPN / 100 ml, and the results of Escherichia Coli in sample A were 15,000 MPN / 100ml and in Sample B 5,000 MPN / 100ml. The water used by the students is still considered unfit for consumption due to the presence of coliform and Escherichia coli bacteria, which can cause disease in humans. Treatment is needed to reduce the bacterial content in the sanitation facilities at the Taha Quranic Education Park.
Analysis of the Water Quality of Padolo River, Bima District Melinda, Tina; Majdi, Muhamad
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.v20i8.11019

Abstract

A river is a body of water characterized by a current flowing from upstream to downstream to the estuary. River water quality is influenced by both natural and human factors, as rivers serve as a venue for various activities. The purpose of this research is to assess the water quality of the Padolo River, as measured by chemical parameters. This type of research is descriptive quantitative. the chemical parameters tested in this study were pH, BOD, COD and DO. pH testing on water samples was conducted using the pH meter method, while BOD, COD, and DO testing were performed using the Winkler method. The research results indicate that the pH levels in the upstream, middle, and downstream sections are the same, specifically 6.9. The BOD value in the upstream section is 10.8 mg / L, the middle section 9.5 mg / L and in the downstream section 18 mg / L, while the COD value in the upstream section is 28 mg / L, the middle section 24 mg / L and in the downstream section 32 mg / L and the DO value in the upstream section is 5.8 mg / L, the middle section 6.8 mg / L and in the downstream section 7.9 mg / L.. Based on the measurement results and government regulation no. 22 of 2021 concerning river water parameter standards, it is stated that the BOD and DO values ​​do not meet the specified quality standards. It is hoped that the local government will conduct routine water quality measurements in the Padolo River, considering that the water is used by residents for bathing, washing, and toilet purposes.
Basic Formulation of Instant Balinese Porridge Using a Gradual Dehydration Method: A Functional Food Approach Based on Balinese Local Wisdom Rabani RS, I Gusti Agung Yogi; Putra, Anak Agung Ngurah Dwi Ariesta Wijaya; Putra, I Nyoman Arya Maha
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.v20i8.11028

Abstract

The increasing demand for convenient foods has encouraged the development of instant products that not only offer practicality but also provide functional health benefits. Balinese porridge, traditionally prepared from red rice, coconut, and indigenous Balinese spices, represents a culturally valuable food with considerable nutritional potential. However, its conventional form is limited by a short shelf life and low practicality. This study aimed to evaluate the effect of drying temperature and drying duration on the physical, nutritional, sensory, and functional properties of instant Balinese porridge produced using a gradual dehydration method. A completely randomized factorial design was applied with two factors, namely drying temperature (50, 60, and 70 °C) and drying time (4, 6, and 8 h), resulting in nine treatment combinations with three replications. Gradual dehydration was conducted through initial oven drying followed by food dehydrator processing. The observed parameters included moisture content, rehydration time, proximate composition, sensory acceptance, and antioxidant activity expressed as IC50 values. The results demonstrated that drying at 60 °C for 6 h produced the lowest moisture content (5.1%) and the fastest rehydration time (2.8 min). The nutritional composition was dominated by carbohydrates (approximately 77%) and protein (7.6–8.3%), with a significant reduction in protein content observed at higher drying temperatures. Sensory evaluation indicated that the 60 °C–6 h treatment achieved the highest scores for color, aroma, taste, and overall acceptance. The highest antioxidant activity was also observed under this condition, with an IC50 value of 72.5 ppm. These findings confirm that gradual dehydration is an effective processing strategy for preserving the quality and functional properties of traditional Balinese porridge, highlighting its potential development as an instant functional food based on local wisdom.
Clean Water Processing through a Filtration System using a Multimedia Filter on River Water in Babak Village, West Lombok Regency Wunda, Elsonpurnama Dhea; Melinda, Tina; Sholehah, Hijriati
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.v20i8.11047

Abstract

The quality of river water is influenced by natural factors and human factors. For humans, the river becomes a place to carry out various activities. The type of research used is an experiment and the object of the research is the water of the Babak River, West Lombok Regency which is processed using a filtration method with a simple filtration system from PVC pipes designed with a filter media arrangement, namely zeolite with a thickness of 5 cm, silica sand with a thickness of 15 cm, activated carbon with a thickness of 10 cm, filter foam with a thickness of 5 cm. This study aims to determine the effects of river water quality testing before and after filtration, as well as the effectiveness of the filter media in reducing pollutant levels. The parameters tested are pH, TSS, TDS, COD, BOD, DO, and Total Coliform. Testing was carried out at the Environmental Laboratory of the Mataram Environmental Engineering College. The test results showed that the water from the Babak River did not meet the standards for clean water. The laboratory tests revealed that the water content value exceeded the quality standards for Class III, as specified in Government Regulation No. 22 of 2021, particularly for the BOD and DO parameters. Therefore, further testing was necessary. According to the filtering results, the effectiveness value of the filter media in the upstream part of the river was 35%, in the middle part was 40%, and in the downstream part was 33% for the BOD parameter. For the DO parameter, the effectiveness values of the filter media in the upstream, middle, and downstream parts of the river were 43%, 58%, and 64%, respectively. Filtration can be a medium to reduce BOD and DO levels, making it a renewable alternative that can be used for other water sources.
Evaluation of Physicochemical Stability and Antioxidant Activity of Single Black Garlic Extract Capsules: Initial Development of Herbal Preparations Ananta, I Gusti Bagus Teguh; Anggara, I Gede Yudi
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.v20i8.11056

Abstract

Black garlic is a fermented product of fresh garlic that is rich in bioactive compounds such as S-allyl cysteine (SAC), polyphenols, and melanoidins, which play an important role as antioxidants and have the potential to be developed as supplements for preventing degenerative diseases. This study aims to evaluate the physicochemical stability and antioxidant activity of black garlic extract capsules during three months of accelerated storage (40 ± 2 °C; RH 75 ± 5%). Black garlic extract was obtained through ethanol maceration, concentration, and freeze-drying, and then formulated into capsules with amylum manihot and starch mucilage as excipients. The analyzed parameters included organoleptic characteristics, weight uniformity, moisture content, pH, total phenolic content using the Folin–Ciocalteu method, and antioxidant activity using the DPPH method. The results showed that capsule weight uniformity met pharmacopeia requirements throughout storage, while moisture content gradually increased, and pH showed a moderate decrease. Total phenolic content significantly decreased from 57.20 ± 0.92 to 43.40 ± 0.75 mg GAE/g by the third month. The antioxidant activity remained in the strong category, as indicated by an increase in IC50 values. The novelty of this study lies in its comprehensive evaluation of the stability of a single black garlic capsule product under accelerated conditions and its relationship to changes in bioactivity during storage. Overall, this study confirms that the single black garlic extract capsule product has good physicochemical stability and antioxidant activity, and has the potential to be developed as a herbal product with antioxidant capacity that is maintained and even increases during storage.
Size Distribution of Mangrove Crabs (Scylla spp.) Caught By Fishermen in the Bagek Kembar Exclusive Ecosystem Area (KEE), Sekotong, West Lombok Laraswati, Lina Sapta; Syukur, Abdul; Karnan, Karnan; Mahrus, H.
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.v20i8.11184

Abstract

Mangrove crab (Scylla spp.) is one of the fishery commodities of high economic value that depends on the existence of mangrove ecosystems. The Bagek Kembar Exclusive Ecosystem Area (KEE) in Sekotong, West Lombok, is one of the important habitats for mangrove crabs and serves as the primary location for fishing activities by local fishermen. This study aims to determine the distribution of mangrove crab size caught by fishermen based on morphometric parameters, which include carapace length, carapace width, abdomen width, propodus length, propodus width, merus length, dactylus length, and plepod diameter. This type of research uses a descriptive research design with a quantitative approach. Sampling was conducted using purposive sampling, where mangrove crabs caught by fishermen at the research site were considered a representative sample of the population. Data analysis was conducted using descriptive statistics, which included calculating mean values, median, mode, and standard deviation, as well as analysing the frequency distribution of mangrove crab sizes. The determination of the number of classes and the interval of the frequency distribution class was carried out using Sturges' rule formula to describe the population structure of mangrove crabs. The study's results showed that most of the mangrove crabs caught were small to medium in size. The majority (65%) of crabs have a carapace length (PK) between 4–6 cm and are dominated by the juvenile or premature gonadal phase. The rarity of large individuals (>10 cm) suggests that crabs are significantly exploited before reaching their maximum adult size. This pattern also shows the role of KEE Bagek Kembar as a nursery ground dominated by juvenile individuals. Based on these findings, management efforts such as determining minimum catch sizes, protecting nursery habitats, increasing fishing gear selectivity, and long-term population monitoring are recommended to support the sustainability of mangrove crab stocks in this region.
Reproductive Aspects of Scad Fish (Selar crumenophthalmus) Landed at the Fish Landing Base of PPI Tanjung Luar, East Lombok Aldauria, Suciq; Karnan, Karnan; Yamin, M.; Merta, I Wayan
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.v20i8.11185

Abstract

Selar crumenophthalmus, known as the bigeye scad, is a commercially important small pelagic fish widely exploited in East Lombok waters. This study aims to examine the reproductive characteristics of the species, including gonadal maturity stages (GMS), gonadosomatic index (GSI), sex ratio, length–weight relationship, and length–fecundity relationship, based on samples collected at PPI Tanjung Luar from June to August 2025. This study employed a descriptive exploratory research design, with samples collected using quota sampling consisting of 90 individuals who landed at PPI Tanjung Luar from June to August 2025, and the data were analyzed descriptively. The species designated GMS I–V, with GMS II and III being the most dominant stages across months. The highest GSI values for both sexes occurred in June, indicating the peak spawning period, with female GSI reaching 2.34% and male GSI 0.80%. Monthly sex ratios shifted from 2.13:1 (June) to 0.64:1 (July) and 1:1 (August). The length–weight relationship showed positive allometric growth in males (b = 3.05) and negative allometric growth in females (b = 2.189). Fecundity ranged from 9,312–11,843 eggs in June and 8,495–15,006 eggs in July, with a strong positive correlation to body length in mature females. These findings indicate that reproduction peaks in June, providing essential information for the sustainable management of the species in Tanjung Luar.
Effect of the Problem-Based Learning Model on Critical Thinking Skills and Biology Learning Outcomes Yanti, Risma; Jamaluddin, Jamaluddin; Merta, I Wayan
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.v21i1.11311

Abstract

Biology learning requires the development of critical thinking skills and learning outcomes through meaningful and contextual processes; however, classroom instruction is often still dominated by conventional approaches. This study aimed to analyze the effect of implementing the Problem-Based Learning (PBL) model on the critical thinking skills and Biology learning outcomes of Grade XI students at SMA Negeri 4 Praya. This research employed a quasi-experimental design with a pre-test–post-test control group. The participants were Grade XI students, divided into an experimental and a control class. The research instruments included a critical thinking skills test based on Ennis' (1996) indicators and a Biology learning outcomes test based on curriculum competencies. The results showed that students in the experimental class achieved significantly higher improvements in both critical thinking skills and learning outcomes compared to the control class. Statistical analysis indicated that implementing the Problem-Based Learning model had a positive, significant effect on student performance. These findings suggest that the PBL model promotes active and meaningful learning, making it an effective approach for enhancing critical thinking skills and Biology learning outcomes among Grade XI students.

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