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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
 111   112   113   114   115 
High School Students Perceptions of Problem-Based Learning (PBL) Integrated with Anthropogenic Phenomena: An Analysis of Engagement and Motivation Dewi, Evie Sylviana; Lestari, Nurita Apridiana
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.v20i7.9834

Abstract

The importance of student engagement and motivation in the physics learning process at the high school level, which has often been perceived as a difficult subject and less relevant to real life. Through the integration of anthropogenic phenomena, learning is expected to become more contextual and foster awareness of environmental issues. This study aims to determine students' perceptions of physics learning activities using the Problem-Based Learning (PBL) model integrated with anthropogenic phenomena. The research was conducted at the high school level using a quantitative descriptive approach. The respondents consisted of 108 tenth-grade students who had participated in physics learning using this model. The research instrument was a validated questionnaire. Data were analyzed using a Likert scale and presented in percentage form. The results of the study indicate that students' perceptions of physics learning using the integrated anthropogenic PBL model are in the good and very positive categories. This is demonstrated by the percentage of engagement aspects exceeding 80% and the motivation aspects reaching 86%. Overall, both aspects scored 61% or higher, indicating that the application of this model is effective in enhancing student engagement and motivation in learning. These findings are expected to serve as a reference for teachers in developing contextual physics learning and contribute as supporting literature for future research.
Synthetic Enzyme Engineering In Silico and In Vivo Approaches for Applications in the Halal Food Industry Anggraini, Welly
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.v20i7.9909

Abstract

Recent developments in biotechnology and bioinformatics have opened new possibilities for designing enzymes for the halal food sector. This study employs an integrated framework combining in silico modelling and in vivo validation to create synthetic enzymes that are both effective and compliant with halal standards. Computational analyses were conducted to predict enzyme–substrate interactions and evaluate structural stability, while experimental validation confirmed enzymatic activity, thermal stability, and safety profiles. The results demonstrate that this dual approach improves design efficiency, enhances catalytic performance, and ensures enzymes originate from halal-certified sources, addressing a notable gap in current research where optimization and religious compliance are often addressed separately. This methodology bridges molecular biochemistry with Islamic jurisprudence, providing a scientifically grounded approach for producing bioenzymes suitable for industrial applications. By showing that halal verification can be integrated without compromising enzyme functionality, the study provides a model for ethical and religiously responsible food production. The findings have broad implications for the halal food industry, supporting scalable enzyme manufacturing and laying the groundwork for future research in synthetic biology, regulatory compliance, and the development of innovative functional foods.
Screening Flavonoids of Ethyl Acetate Extract from Matoa Tree Bark (Pometia pinnata) Using UV-Vis Spectrophotometry Method Budiyanto, Ratno; Kholis, Ach.; Taufiqurrahman, Taufiqurrahman
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.v20i7.10099

Abstract

Matoa tree bark is a plant that contains flavonoid chemical compounds believed to be a traditional medicine in various alternative treatments. Therefore, it is important to measure its flavonoid content. Ethyl acetate extracts were prepared using the maceration method at durations of 3 x 24 hours. The aim of this study was to determine the flavonoid compound content and levels in matoa tree bark (Pometia pinnata) using UV-Vis spectrophotometry. Qualitative analysis was carried out using NaOH reagent and the wilstater cyanidin test, both of which showed positive results for containing flavonoid compounds, indicated by an orange color change. Quantitative analysis using a regression quercetin standard curve with an R2 value of 0,9844 revealed a flavonoid content of 2.712%. These results indicate that matoa tree bark extract has a high flavonoid content and has the potential to be developed as a herbal medicine formulation.
Development of a Student Worksheet Based on Project-Based Learning to Improve Learning Outcomes of Junior High School Students Rahmah, Yuniarti Khairini; Hafizah, Ellyna; Annur, Syubhan
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.v20i7.10161

Abstract

This research involves the development of a Student Worksheet based on project-based learning for the solar system sub-material, focusing on improving the learning outcomes of junior high school students. The purpose of this study is to identify the level of validity, practicality, and effectiveness of the project-based learning Student Worksheet. The method employed in this research is Research and Development (R&D), utilising the ADDIE approach as the development model. This study demonstrates that project-based learning, specifically the Student Worksheet on solar system sub-materials, is deemed highly valid, with a validity value of 0.88, aimed at enhancing student learning outcomes. The practicality of the results from a student response questionnaire, with 82.24% of students agreeing, indicates that the Student Worksheet is highly practical. Effectiveness based on knowledge learning outcomes, with the calculation of n-gain from pretest and posttest, obtained an average n-gain of 0.71 with high criteria, attitude learning outcomes obtained an average of 90.67% which is categorised as very good, and learning outcomes skills obtained an average of 91% which is categorized as very good. The results of the study demonstrate that the Student Worksheet project-based learning on the solar system sub-material is feasible for use, as it meets the criteria of validity, practicality, and effectiveness in improving student learning outcomes. The implications of this research suggest that project-based learning Student worksheets can serve as an alternative, innovative teaching material that encourages active student involvement, improves critical thinking skills, and provides educators with a reference for developing learning tools that align with the demands of the Independent Curriculum and 21st-century learning.
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.

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