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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 30 Documents
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Search results for , issue "Vol. 20 No. 7 (2025)" : 30 Documents clear
The Effect of Project-Based Learning with a STEM Approach on Students Creative Thinking Ability and Science Process Skills Sidabutar, Tri Fitri Cahyati; Djulia, Ely; Sinaga, Marlina
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10193

Abstract

Creative thinking ability is one of the essential demands of 21st-century learning, which needs to be supported by science process skills to foster deeper understanding and meaningful learning experiences. However, science learning in schools is still largely dominated by lecture methods with minimal practical activities, resulting in students being less active, untrained in creative thinking, and rarely engaged in scientific processes. This study aims to investigate the effect of the Project-Based Learning (PjBL) model with a STEM (Science, Technology, Engineering, and Mathematics) approach on students’ creative thinking ability and science process skills in the topic of elements, compounds, and mixtures. The research employed a quasi-experimental method with a pretest-posttest control group design for creative thinking ability and a posttest-only control group design for science process skills. The sample consisted of two eighth-grade classes selected through random sampling, with 30 students in each class. One class was assigned as the experimental group, taught using the STEM-based PjBL model, while the other served as the control group using conventional instruction. Research instruments included essay tests and observation sheets. Data analysis using the t-test revealed a significant effect on creative thinking ability (p = 0.001, p < 0.05) and science process skills (p = 0.004, p < 0.05). The novelty of this study lies in the integration between the design of PjBL and the STEM approach, with systematic measurement of two important indicators of 21st-century learning: creative thinking and science process skills, in the context of applied basic chemistry topics. Thus, the findings affirm that integrating PjBL with STEM is effective in fostering 21st-century skills. Based on these results, it is recommended that innovative and contextually relevant projects be designed to support the development of meaningful science learning.
The Potential af Robusta Coffee Leaf Flour (Coffea canephora) as a Functional Food Ingredient: Antioxidant Activity Analysis Parwati, Ni Komang; Rabani RS, I Gusti Agung Yogi; Widnyani, Ida Ayu Putu Ary; Putra, Anak Agung Ngurah Dwi Ariesta Wijaya; Sintyadewi, Putu Rima
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10200

Abstract

Functional food has become a rapidly growing segment in the global food industry, emphasizing the use of natural resources as sources of functional ingredients. One promising candidate for development is Robusta coffee leaf flour. The purpose of this study was to determine the optimal treatment and the effect of drying temperature on the antioxidant activity of Robusta coffee leaf flour. This study employed a one-factor randomized block design (RBD). The treatments consisted of combinations of temperature and time, with six levels: P1T1 = 50°C for 4 hours; P1T2 = 50°C for 5 hours; P1T3 = 50°C for 6 hours; P2T1 = 60°C for 4 hours; P2T2 = 60°C for 5 hours; and P2T3 = 60°C for 6 hours. Each treatment was repeated three times, resulting in a total of 18 experimental units. The data were analyzed using ANOVA and Duncan’s multiple range test for significant results. Findings indicated that the highest antioxidant activity was achieved at 60°C for 6 hours (P2T3), with a value of 73.51 ppm. Robusta coffee leaf flour demonstrates strong potential as a functional food ingredient, with optimal antioxidant activity achieved through specific drying conditions. Further research is recommended to investigate its bioactive compound profile and potential applications in food products.
Synthesis of Gold Nanoparticles Using Ascorbic Acid as a Bioreductor and the Effect of Uric Acid Rachmawati, Yulle; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10235

Abstract

Gold nanoparticles (AuNPs), ranging in size from 1 to 100 nm, represent one of the most significant advancements in metal-based technologies in recent years. Their application in the medical field, especially as drug delivery agents, is particularly noteworthy and demonstrates their transformative potential. This study aims to synthesize AuNPs using HAuCl4 as a precursor and ascorbic acid as a bioreductant at a concentration of 20 ppm with a bottom-up method. The result of the synthesis process yields a striking burgundy-colored solution, signifying the successful formation of gold nanoparticles. The results of UV-Vis characterization provided insightful data on the transformation of the HAuCl4 solution. Initially recorded at a wavelength of 314.60 nm, the solution underwent a notable shift to 523.50 nm after the synthesis process, demonstrating an absorbance value of 0.323. Furthermore, the transmission electron microscopy (TEM) analysis illuminated the unique characteristics of the synthesized nanoparticles, revealing an average particle size of 6.23 nm with the highest particle frequency in the range of 6-8 nm. Moreover, the result of clinical trials conducted with ten randomly selected volunteers, who received 20 ppm of AuNPs over a five-week period, demonstrated that seven out of ten participants experienced a significant reduction in uric acid levels, underscoring the therapeutic potential of gold nanoparticles. Microscopic observations following the injection revealed that volunteers with normal uric acid levels exhibited fewer leukocytes than those with elevated uric acid levels, who were noted to have leukocyte counts up to three times higher. In conclusion, the synthesis of AuNPs using ascorbic acid is marked by a wine-red solution and a significant absorption wavelength shift to the 500–600 nm range. The positive results of the clinical trial reflect the ability of AuNPs to lower uric acid levels, thereby paving the way for innovative nanotechnology-based therapeutic strategies in the medical field.
Promoting Students Critical Thinking and Cognitive Learning Outcomes through Problem-Based Learning integrated with Mind-Mapping Lianto, Lianto; Rohayati, Yulista Trias
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10243

Abstract

Critical thinking and advanced cognitive abilities are vital competencies in 21st-century biology education, especially in complicated subjects like immunology. Innovative pedagogical methods are crucial for helping pupils overcome learning challenges and develop a deep understanding. This study examines the integration of problem-based learning (PBL) with mind-mapping approaches to enhance undergraduates' critical thinking and cognitive learning in immunology education, a field often regarded as complex and interdisciplinary. A quasi-experimental one-group pretest-posttest design was utilized, comprising 23 undergraduate students participating in a fundamental immunology course at the State University of Malang, Indonesia. Data were gathered using essay-based evaluations and evaluated employing paired t-tests, N-gain scores, and effect size computations. The results demonstrated substantial enhancements in both critical thinking and cognitive learning outcomes post-intervention, with impact sizes classified as big to very large. The extent of improvement differed among indicators, exhibiting moderate advancements in applying, evaluating, and analyzing, whereas synthesis showed only modest advancement. The results indicate that PBL combined with mind-mapping can effectively enhance higher-order thinking skills in complex subjects, providing dual scaffolding that aids students in organizing intricate concepts, visualizing relationships, and reinforcing higher-order thinking abilities.
Comparative Potential of Antibacterial Activity of Marine Plants for the Development of Natural Antimicrobial Agents: A Review Zikria, Nazila Nazwa; Nurhadis, Nurhadis
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10264

Abstract

Antibiotic resistance remains a major global health concern, driven by the misuse and overuse of antibiotics, which has resulted in multidrug-resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA) and extended-spectrum beta-lactamase-producing Escherichia coli (ESBL-E. coli), leading to increased morbidity, mortality, prolonged hospital stays, and rising healthcare costs. To address this challenge, the search for alternative antibacterial agents that are natural, sustainable, and environmentally friendly has become urgent. Marine plants, including red macroalgae (Rhodophyta), brown algae (Phaeophyta), green algae (Chlorophyta), and seagrasses, produce secondary metabolites such as flavonoids, alkaloids, terpenoids, tannins, and sulfated polysaccharides with promising antibacterial properties. This systematic review analyzed 320 articles from PubMed, Google Scholar, and ScienceDirect, of which eight met the inclusion criteria, to compare the antibacterial potential of marine plant extracts against Gram-positive and Gram-negative pathogenic bacteria. The findings indicated that species such as Kappaphycus alvarezii, Corallina officinalis, Eucheuma spinosum, Sargassum polycystum, Caulerpa racemosa, and Padina australis exhibited antibacterial activity ranging from weak to very strong depending on species, extraction methods, solvents, concentrations, and environmental conditions, with K. alvarezii showing the highest inhibition zone of up to 26 mm against Bacillus subtilis and Vibrio species. The antibacterial mechanism is believed to involve membrane disruption, alteration of permeability, and inhibition of protein and DNA synthesis. In conclusion, marine plants demonstrate strong potential as sources of natural antibacterial agents that may reduce dependence on conventional antibiotics and mitigate the global antibiotic resistance crisis, though further research is required to standardize extraction methods, isolate active compounds, and validate efficacy and safety through MIC, MBC, and in vivo studies before clinical and industrial application.
Needs Analysis of Ethnoscience-Based STEM Teaching Materials for the Science Education Program Santoso, Agus; Mahbubah, Khoiro; Aini, Qonita Qurotul
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10316

Abstract

This research is driven by the urgent need to produce university graduates who are not only scientifically competent but also creative and possess a strong appreciation for local wisdom, aligning with the Golden Indonesia 2045 vision and the National Research Master Plan's focus on local knowledge. A preliminary problem analysis identified a gap: the absence of ethnoscience-based STEM (Ethno-STEM) teaching materials specifically designed for university students to enhance their appreciation of local wisdom and creativity. This study aims to analyze the need for Ethno-STEM course materials, which will subsequently be developed into a valid, practical, and effective product. A descriptive mixed-methods approach was employed. Data were collected through document analysis of the semester learning plan, a questionnaire administered to 25 students, and semi-structured interviews with 4 science course lecturers. The results indicate that: (1) The document analysis of the STEM course semester learning plan at UNISLA explicitly mandates the integration of local wisdom and ethnoscience in its learning outcomes. (2) The questionnaire results show that an average of 88% of students expressed a high need for Ethno-STEM teaching materials to improve four key aspects: appreciation of local wisdom, creativity, learning interest, and conceptual understanding. (3) Lecturers confirmed difficulties in finding ready-to-use, structured teaching resources to support the Ethno-STEM project-based learning. The novelty of this study lies in its specific mapping of needs, providing an empirical justification for developing Ethno-STEM teaching materials at the higher education level. It is concluded that there is a valid and urgent need to develop systematic Ethno-STEM teaching materials to support curriculum implementation and enhance the quality of learning in the Science Education Program at UNISLA.
Fermentation of Gembili Juice: Innovation in Functional Beverages Based on Lactobacillus plantarum B1765 Amaliyah, Rohilatul Bidayah; Wikandari, Prima Retno
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10354

Abstract

Gembili tubers (Dioscorea esculenta) are abundant in Indonesia but remain underutilised despite their potential as a functional food. One effort that has been made is to produce a symbiotic fermented beverage, as it is known to contain prebiotic inulin that can be fermented using probiotics. Lactobacillus plantarum B1765 is charactherized by its probiotic potential. This research evaluated the impact of fermentation duration using L. plantarum B1765 starter culture on the quality of gembili juice products, including Total Lactic Acid Bacteria (LAB), pH, Total Titratable Acids (TTA), and organoleptic quality. Gembili juice was made by fermenting gembili juice at 37°C for 0, 6, 12, 18, 24, and 36 hours. The total LAB count was enumerated using the total plate count (TPC) method with MRS-Agar medium containing CaCO3. pH determination was performed using a pH meter. TTA was calculated by acid-base titration, and organoleptic quality was assessed by untrained panellists, who rated the level of liking using a hedonic scale. The total LAB and pH data were analyzed using the Kruskal–Wallis test, while the TTA data were analyzed using a one-way ANOVA to determine the significant differences among the fermentation durations. The fermentation time of gembili fermented beverages had an effect (p < 0.05) on the total number of LAB, pH, and TTA. LAB growth increased and reached an optimum of 7.55 x 10⁸ CFU/mL at 18 hours. However, the pH continued to decrease to 3.84, and the TTA continued to increase to 0.32% until the end of fermentation. Sensory evaluation (hedonic test) showed that fermentation time had no effect (p>0.05) on color and aroma. Still, it had an impact (p < 0.05) on taste, with the highest preference for the 18-hour fermentation. This product complies with SNI standards and is suitable for development as a fermented functional beverage. The inulin and phenolic compounds present in gembili may contribute to its antioxidant activity and α-glucosidase inhibitory effects.
Antioxidant Activity and Organoleptic Tests on Functional Drinks Made from Soursop Leaves (Annona Muricata) with a Combination of Sappan Wood (Biancaea Sappan) Eno, Kristina Febrianti; Sintyadewi, Rima; Widnyani, Ida Ayu Putu Ary; Putra, Anak Agung Ngurah Dwi Ariesta Wijaya; Rabani RS, I Gusti Agung Yogi
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10363

Abstract

Functional beverages are popular because they have bioactive compounds that contribute to body health. This study aimed to determine the effect of combining soursop leaves (Annona muricata) and sappan wood (Biancaea sappan) on total phenolic content, flavonoid content, antioxidant activity, and sensory characteristics of a functional beverage. The study employed a Complete Randomized Design (CRD) with one factor consisting of seven treatment combinations, which represented different proportions of soursop leaves and sappan wood. The results showed that the 70% soursop leaves and 30% sappan wood combination (A7B7) produced the highest total phenolic content of 3335.97 mg GAE/100g, the flavonoid content of 2180.35 mg QE/100g, and the lowest IC50 value of 62.02 ppm, indicating strong antioxidant activity. Sensory tests showed that treatment (A1B1) in color parameters showed a significant difference (p<0.05), and treatment (A2B2, A3B3, A4, B4, A5B5, and A6B6) in taste, aroma, texture, and preference parameters did not show a significant difference (p<0.05). The A7B7 combination was identified as the best formulation based on antioxidant activity and panelist preferences.
The Analysis of Students Creative Thinking Ability Using Mind Map on Solution Topic Wahyuni, Melati; Aini, Faizah Qurrata
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10379

Abstract

Creative thinking is one of the key competencies in 21st-century education. This study aimed to analyze students’ creative thinking skills on the topic of solutions using mind maps as an assessment tool. This study used a quantitative descriptive method involving 44 XII-grade students from two senior high schools in Padang City during the 2025/2026 academic year. The instrument used was adapted from Rahayu et al., focusing on four indicators of creative thinking: fluency, flexibility, originality, and elaboration. The results showed that most students (95.45%) were categorized as less creative, while one student (2.27%) was creative, and one (2.27%) was not creative. No students achieved the highly creative level. The highest achievement was in the fluency aspect (86.36%), followed by flexibility (60.90%), originality (38.25%), and elaboration (19.88%). These findings indicate that students were relatively capable of generating ideas but struggled to develop and connect them in more original and detailed ways. This study highlights the novelty of using mind maps as an alternative assessment tool for measuring creative thinking in chemistry learning, specifically in the context of solutions, and suggests the need for creativity-oriented instructional approaches.
The Influence of Wet Aging on pH, Meat Color, Fat Color and Water Holding Capacity of Bali Beef from Traditional Slaughterhouses in Lombok Fitriani, Baik Mesy Darita; Dahlanuddin, Dahlanuddin; Fahrullah, Fahrullah; Bulkaini, Bulkaini; Ashari, M; Firhamsah, Ikhwan; Gifari, Zaid Al
Jurnal Pijar Mipa Vol. 20 No. 7 (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.v20i7.10400

Abstract

Beef quality plays a vital role in ensuring consumer satisfaction and market competitiveness, particularly in regions where traditional slaughtering practices remain prevalent. This study aimed to evaluate the physical quality of Bali beef obtained from traditional slaughterhouses on Lombok Island and to determine the effect of wet aging on meat quality. The experiment used longissimus dorsi muscle samples from 1 to 3-year-old male Bali cattle. Physical parameters analyzed included pH, meat color, fat color, and water-holding capacity (WHC). Data were analyzed using a Factorial Completely Randomized Design followed by Duncan’s Multiple Range Test. Results showed that wet aging had a significant effect (p<0.05) on most physical parameters. The pH decreased from 5.85 to 5.57, meat color became slightly darker due to myoglobin oxidation, and fat color became lighter under vacuum conditions. WHC increased from 47.13% to 50.34%, indicating improved water retention. Based on these findings, it can be concluded that beef from traditional slaughterhouses in Lombok still meets the quality standards of fresh meat. Furthermore, the 21-day wet aging process significantly enhanced the physical quality of Bali beef without causing adverse effects, demonstrating its potential as a practical post-slaughter treatment to improve the competitiveness of local beef products.

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