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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
 84   85   86   87   88 
Bioplastic Based on Starch from Keciri Tuber (Amorphophallus campanulatus) Riskayanti, Yunita; Dilatais, Bunga Zorra; Natasya, Ditha; Nurhidayatullah, Nurhidayatullah
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8558

Abstract

Plastic waste is one of the primary contributors to environmental problems. In West Sumbawa Regency, particularly in Seteluk District, the use of plastic remains relatively high, as observed in schools and residential areas, including the researcher’s own environment. This is evidenced by the significant accumulation of plastic waste. The purpose of this study is to examine the potential of the keciri plant (Amorphophallus campanulatus) in West Sumbawa Regency, to analyze the characteristics of bioplastic made from keciri tuber starch (Amorphophallus campanulatus), and to determine whether keciri tuber starch (Amorphophallus campanulatus) can be utilized as a material for bioplastic production. The research method used in this study was experimental, employing a quantitative descriptive experimental design. The conclusions of the study are as follows: the keciri plant (Amorphophallus campanulatus) grows abundantly in the wild around the researcher’s residence, and it was also commonly found in other areas such as Poto Tano District, Seteluk District, and the villages of Senayan, Rempe, and Meraran. Based on data from three bioplastic tests conducted, the water resistance tests showed that all types of bioplastics exhibited similar water resistance levels, with an average of 60%. The biodegradability tests revealed that all types of bioplastics degraded completely within 5 days, indicating that the produced bioplastics are fully biodegradable in soil. For organoleptic tests, each type of bioplastic yielded different results. Bioplastics made with cooking oil and glycerol achieved the highest scores, followed by those made with VCO (virgin coconut oil) and no plasticizer, while those using coconut oil plasticizer scored the lowest. Since the researcher aimed to produce edible bioplastics, VCO was chosen as the plasticizer. Therefore, keciri tuber starch could be used for bioplastic production by mixing it with VCO plasticizer and pomelo juice extract, making it suitable for use as food packaging.
Condition of Coral Reefs at Mentigi Beach, North Lombok Regency Murdani, Muhammad Taufiq Zulfikri; Candri, Dining Aidil; Ahyadi, Hilman
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8625

Abstract

Climate change and excessive anthropogenic activities have an impact on coral reef damage. Coral reef damage can be seen from several criteria, one of which is the percentage of live coral cover. North Lombok is one of the districts on Lombok Island whose coral cover has been damaged.  This research aims to identify marine biota, coral reef genus, analyze community structure and condition of coral reefs at Mentigi Beach. Coral reef genus data was taken using Coral Finder 2.0 Indo Pacific by Russel Kelley, while coral reef data was obtained using the UPT (Underwater Photo Transect) method at three stations with depths of 1-5 meters and 6-10 meters. The results showed that live coral cover at stations I, II, and III were 12.44%, 17.42%, and 32.46%, respectively. At a depth of 1-5 meters, it was found to be 21.93%, and 19.62% at a depth of 6-10 meters. There are 11 benthic categories, and 30 coral reef genera identified. The Porites genus is cosmopolitan in the research location. The diversity, evenness and dominance indices show that coral reef genera are evenly distributed with no one dominating the coral reef ecosystem at Mentigi Beach, Pamenang, North Lombok Regency.
Comparison of polymer types on physical evaluation of in situ ophthalmic gel preparations: A Review Putra, Hasan Etanov; Zahra, Aliya Azkia; Aini, Kania Nurul; Rafifa, Muthia; Maulida, Verin Sakinah; Sabrina, Lina Maisa
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8630

Abstract

The development of temperature, pH, and ion-responsive in situ ophthalmic gels aims to enhance drug retention and release efficacy in the eye. Polymers such as Poloxamer (thermosensitive), Gellan Gum (ion-sensitive), and Carbopol (pH-sensitive) exhibit adaptive gelation mechanisms suited to ocular physiological conditions. Poloxamer forms a gel at body temperature, prolonging drug contact duration, while Gellan Gum creates a stable gel network through ionic interactions with lacrimal fluid, increasing viscosity and extending drug release. Carbopol, which transitions into a gel at neutral pH, provides optimal viscosity stability in the ocular environment. This study employs a literature review method, gathering data from indexed journals and scientific publications over the past 10 years. Evaluation results indicate that a combination of Gellan Gum and Methacrylated Gellan Gum at a concentration of 0.6% w/v yields the highest viscosity and encapsulation rate, with a contact time of up to 8 hours, making it an excellent formulation for long-term ophthalmic applications. This paper highlights the significant potential of in situ gels as drug delivery systems, optimizing ophthalmic therapy by enhancing drug viscosity and encapsulation stability.
Improvement of Student Learning Outcomes Using E-Worksheets Assisted Live Worksheets on Basic Chemistry Laws Material Arifianti, Dwi; Yanuardani, Ayu; Khasanah, Maulidia Uswatun; Kusumaningrum, Yesika Dewi; Ayunin, Khurota; Azizah, Utiya; Asih, Dian; Rahadityo, Purwo
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8721

Abstract

This study investigates the improvement of student learning outcomes using e-worksheet media with Live Worksheets. Conducted as Classroom Action Research (CAR), it involved 38 students from class X-7 at SMA Negeri 18 Surabaya. Data collection included observation techniques and learning outcome tests aimed at assessing teacher and student activities. The observation data were analyzed using a percentage formula for relevant activities over two meetings. Learning outcome tests measured improvements after cycles I and II, analyzed for the percentage of classical completeness in learning outcomes. Results indicated that teacher activity increased from 91% in cycle I to 100% in cycle II, while student activity rose from 79% to 89%, which falls into the very practical category. Additionally, learning outcomes improved significantly, increasing from 50% before the intervention to 79% in cycle I and 89% in cycle II, which is ≥75%. These findings demonstrate the effectiveness of e-worksheet media in improving educational engagement and achievement. The study concludes that technology-based learning innovations can effectively address educational challenges and recommends further development of interactive learning tools across various subjects and educational levels.
Enhancing Students Understanding of Hybridization in Organic Compounds through a Flipped Classroom Approach Combined with Game-Based Learning Baroud, Najah; Aljarmi, Abtisam
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8725

Abstract

This study investigates how effective it is to combine flipped classroom and game-based learning strategies for teaching the intricate subject of hybridization in organic chemistry for the third semester of Chemistry Department students, Faculty of Education, University of Zawia, academic year 2024-2024. The research involves 60 participants, who are split into two groups: a main group (MG), which was taught using the combined approach of flipped classroom and game-based learning, and a comparison group (CG), which received conventional instruction. The MG was provided with pre-class instructional videos and PowerPoint slides, which were later reinforced through engaging activities in class, including competitive games aimed at applying the concepts learned. A post-test assessing memorization and understanding of hybridization concepts indicated that the MG surpassed the CG in both aspects. The MG obtained an overall score of 73.51% on memorisation questions, in contrast to the CG's 65.00%. The Percentage gap was 8.51%. For comprehension questions, the MG achieved an impressive 85.15%, while the CG managed only 48.95%. Percentage gap 36.2%.The results indicate that the combined strategies are effective in promoting a deep comprehension of the material. Moreover, qualitative responses from a questionnaire revealed a pronounced preference for the flipped classroom and game-based learning methods, as students noted enhanced engagement and understanding. This research underscores how innovative teaching methods can enhance the quality of chemistry education, stressing that interactive and adaptable learning environments are crucial for student success. Moreover, the study recommends employing such methods in chemistry education to enhance learning outcomes and boost student motivation.
Plant-Based Probiotic Beverages in Preventing the Growth of Foodborne Pathogenic Bacteria: A Review Wulansari, Nadya Treesna
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8745

Abstract

Foodborne illnesses are mostly caused by bacteria. Bacteria, including Escherichia coli, Salmonella sp., Shigella sp. and Staphylococcus aureus, are the most common causes of foodborne diseases. One alternative to reduce the risk of infection from bacteria that cause foodborne diseases is the consumption of probiotic beverages, which has become a natural alternative in improving digestive health and endurance. One type of probiotic drink that is gaining increasing attention is plant-based kombucha tea. Plant parts that can be used as kombucha tea are fruits, leaves, and flowers and have antibacterial activity with various categories of inhibition zone strength. This research uses a systematic review and collects relevant articles, with 14 articles as the main reference. The analysis found that salak Bali fruit, pineapple honey fruit, belimbing wuluh fruit, tea leaves, soursop leaves, telang flowers, gardenia flowers, and red seaweed have the potential as a probiotic kombucha tea drink that can inhibit the growth of pathogenic bacteria that cause foodborne diseases. The categories of inhibition zones produced ranged from weak to very strong, with inhibition zone diameters ranging from 4.20 mm to 24.7 mm. The optimal zone of inhibition of this probiotic drink is influenced by the plant parts used, the length of fermentation, the type of substrate, the test method and the type of bacteria. Plant-based probiotic beverages show effective antibacterial activity against foodborne pathogens and offer valuable insights into microbial interactions and sustainable food biotechnology in scientific learning.
The Influence of Using Learning Media Assisted by Smart Apps Creator (SAC) on Students Cognitive Learning Outcomes on the Human Circulatory System Material Djano, Apriyansah; Latjompoh, Masra; Uloli, Ritin; Abdjul, Tirtawaty; Ntobuo, Nova Elysia; S.Payu, Citron
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8793

Abstract

This research aims to determine the effect of using learning media assisted by Smart Apps Creator (SAC) on students' cognitive learning outcomes on the human circulatory system material at SMP Negeri 2 Suwawa. The research method used in this study was an experiment using a One Group Pretest-Posttest Design with a population of all VIII grade students of SMP Negeri 2 Suwawa. The sample consists of 3 classes, namely the experimental class, replication 1 and replication 2, with a purposive sampling technique. Data was obtained by statistical tests and inferential statistics, including normality tests, hypothesis tests, and N-Gain analysis. The results of the average acquisition of class VIII students were greater than the KKTP, shown by the average value of the experimental class of 84.48, replication class 1, 81.14 and replication class 2, 86.45, compared to the KKTP of 75. Based on the hypothesis testing criteria, where the t count in the experimental class was 10.969 compared to the t table of 2.045, replication class 1 obtained a t count of 6.710 with a t table of 2.074, and replication class 2 obtained a t count of 9.569 with a t table of 2.093. It can be concluded that the hypothesis testing in the three classes is that the tcount is greater than the ttable. This can be interpreted as the use of learning media assisted by Smart Apps Creator influences students' cognitive learning outcomes.
Rethinking Reactivity: How Structure, Energy, and Entropy Drive Chemical Transformations Alzeer, Jawad
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.v20i4.8795

Abstract

This work introduces a new way to understand chemical and biological reactivity by connecting molecular structure directly to potential energy and entropy. Moving beyond traditional views, where potential energy is merely “stored energy” and entropy a measure of “disorder”, this structural-thermodynamic framework defines both properties through the lens of constitution, configuration, and conformation. By analyzing diverse mechanisms, including nucleophilic substitutions, eliminations, and cycloadditions, the study shows how structure drives energy storage and release, as well as entropic expansion. The framework highlights how organization increases potential energy while dissociation and flexibility enhance entropy. This structural view not only clarifies the thermodynamic basis of reaction pathways but also offers a predictive model for molecular design in drug development, catalysis, and computational chemistry. By linking structure to thermodynamic behavior, the approach helps students and researchers move from memorization to mechanistic reasoning, providing a unified tool to interpret and anticipate chemical transformations.
The Relationship Between Students Perceptions of Biology Teacher Competence and Students Learning Independence, Motivation, and Creativity in North Toraja Regency, South Sulawesi Marrandan, Barnabas Pera; Junda, Muhammad; Ali, Alimuddin
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8820

Abstract

This study examines the relationship between students' perceptions of biology teacher competence with their learning independence, motivation, and creativity in North Toraja Regency. A quantitative approach with a correlational design was used. This study aims to determine the nature of the relationship between the perception of biology teacher competence with learning independence, learning creativity, and learning motivation, as well as the relationship between learning independence, creativity, and learning motivation of class XI IPA (Group F) students of State Senior High Schools in North Toraja Regency in the 2024/2025 academic year. Data collection was carried out through a questionnaire covering perceptions of teacher competence, learning independence, creativity, and motivation. Descriptive and inferential statistical analyses were carried out, including Pearson correlation tests and regression analyses. The results showed a significant positive correlation between perceptions of teacher competence with learning independence (r = 0.680), creativity (r = 0.766), and motivation (r = 0.849), with a p value of 0.000. These findings indicate that positive perceptions of teacher competence contribute to improving student learning outcomes.
The Administration of a Combined Extract of Gotu Kola (Centella asiatica) and Peppermint (Mentha piperita) Leaves on the Brain Cell Count of Stressed Male Mice (Mus musculus) Padmiswari, Anak Agung Istri Mas; Wulansari, Nadya Treesna; Harditya, Kadek Buja
Jurnal Pijar Mipa Vol. 20 No. 3 (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.v20i3.8843

Abstract

Chronic stress is a condition that can adversely affect the central nervous system, particularly the brain, by causing damage to neurons in the hippocampal region, which plays a crucial role in memory and learning functions. This study aimed to evaluate the neuroprotective effects of a combined extract of gotu kola leaves (Centella asiatica) and peppermint leaves (Mentha piperita) on the number of normal brain cells in male mice (Mus musculus) subjected to chronic stress. A Completely Randomized Design (CRD) was used with five treatment groups: a negative control group (K−) with no stress and no extract, a positive control group (K+) exposed to stress without extract administration, and three treatment groups (P1, P2, and P3) receiving the combined extract at doses of 100 mg/kg BW, 200 mg/kg BW, and 300 mg/kg BW, respectively. Stress induction was carried out using the immobilization method for 14 consecutive days, followed by extract administration for 35 days. After the treatment period, hippocampal brain tissue was collected and histologically analyzed using Hematoxylin-Eosin (H&E) staining. To assess the treatment effects, One-Way ANOVA was performed. Significant differences were found, Duncan’s Multiple Range Test (DMRT) was conducted at a 5% significance level (p< 0.05). The results demonstrated that administration of the gotu kola and peppermint extract combination significantly reduced neuronal damage and increased the number of normal brain cells. The P3 group (300 mg/kg BW) exhibited the highest number of normal brain cells and the lowest neuronal damage scores, closely resembling the normal condition in the K− group. Therefore, the combination of gotu kola and peppermint leaf extracts shows potential as a natural neuroprotective agent in mitigating the adverse effects of chronic stress on the brain.

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