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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
 77   78   79   80   81 
The Effect of Giving Shallot Extract (Allium Cepa L) and NPK Fertilizer on the Growth of Green Mustard Plants (Brassica Juncea L) Irnawati, Diah Harun; Kusmiyati, Kusmiyati; Raksun, Ahmad
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.6605

Abstract

Plant growth and development require nutrients, which can be given through fertilization in the form of organic or inorganic fertilizers. This study aims to determine the effect of providing shallot extract, NPK fertilizer, and a combination of both on the growth of mustard greens. This study used a two-factorial, Completely Randomized Design (CRD) consisting of NPK fertilizer and shallot extract treatments, each using five levels with three replications. The parameters observed were plant height, number of leaves, leaf area, plant fresh weight, and plant dry weight. The data obtained were analyzed using two-way ANOVA and continued with the Duncan multiple range test. The results of the ANOVA test showed that the main factor of NPK fertilizer obtained a value of (sig) ˂ 0.05, the main factor of organic fertilizer was red onion extract, and the interaction factor obtained a value of (sig) ˃ 0.05. The study results showed that the administration of NPK fertilizer can increase plant height, number of leaves, leaf area, wet weight, and dry weight of green mustard plants. The administration of shallot extract can increase plant height and the number of green mustard leaves. Still, it cannot increase green mustard plants' leaf area and wet and dry weight. The administration of a combination of NPK fertilizer and shallot extract cannot increase plant height, number of leaves, leaf area, wet weight, and dry weight of green mustard.
Synthesis and Characterization of ZnO Nanoparticles using the Duwet (Syzygium cumini) Leaves Extract as Bioreductor Evawati, Kholif; Sutoyo, Suyatno
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.7928

Abstract

The synthesis of ZnO nanoparticles was conducted using a green synthesis method that utilizes plants as bioreductors. The secondary metabolites contained in the plants can act as bioreductors in the reduction process of metal oxides and as capping agents in the production of ZnO nanoparticles. This research aims to determine the characterization of ZnO nanoparticles using Syzygium cumini leaves extract as bioreductor. The type of research is experimental research. In this study, the characteristics of ZnO nanoparticles were examined using extracts from the leaves of the duwet tree (Syzygium cumini). Synthesis was performed with varying compositions of zinc acetate dihydrate solution and duwet leaf extract at ratios of 1:1, 1:2, 1:3, and 1:4, as well as pH levels of 7, 8, 9, and 10. The nanoparticles were then characterized using UV-Vis spectrophotometry and a Particle Size Analyzer (PSA) to determine the optimal conditions. The optimal conditions for synthesizing ZnO nanoparticles were obtained with a maximum wavelength (λmax) of 368 nm at a ratio of 1:2 and pH 8. The particle size distribution analysis from the PSA indicated an average size of 19.52 nm, with a Poly Dispersity Index (PDI) value of 0.2491. The analysis results using XRD showed the synthesized nanoparticles showed the typical peak for ZnO with 2θ values of 31,7680o, 34,3699 o, and 36,2281o, confirming that the synthesis of nanoparticles had successfully produced ZnO nanoparticles. The UV-Vis, FTIR, and XRD characterization results showed that the nanoparticles produced were pure ZnO nanoparticles.
Evaluation of Laboratory Waste Management at Mataram University as a Basis for Preparing Environmental Pollution Prevention Policies Akhdiyat, Hendra R.; Sarjan, M.; Sjah, Taslim
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8213

Abstract

This research discusses the application of the balance principle in laboratory waste management as a strategy to minimize environmental impacts. This principle aims to balance laboratory activities and environmental protection by reducing waste at the source, sorting it out, and using environmentally friendly waste processing technology. The research used a descriptive qualitative approach in the Mataram University laboratory. The research results show that applying the balance principle is still not optimal due to limited understanding, infrastructure and adequate policy support. Recommended strategies include implementing the 3R principle (Reduce, Reuse, Recycle), selecting safer chemicals, and increasing training and preparing clear SOPs. Waste identification reached (50%), with limitations in storage (44%) and transportation (43%). Management and final disposal were minimal (33% and 38%), increasing environmental risks. Documentation, reporting (43%), and regulatory compliance (43%) still need to be improved. The K3 aspect is quite good (54%), but emergency response procedures are still weak. Sustainable management (37%) and environmental monitoring (43%) lack effort in mitigating environmental impacts. Applying the principle of balance is important to achieve sustainable laboratory waste management.
Extraction and Characterization of Moringa Seed Oil Results from Soxhletation and Screw Pressing Handayani, Sri Seno; Gunawan, Erin Ryantin; Suhendra, Dedy; Murniati, Murniati; Bali, Rizka Dhia Khalilah; Sari, Gita Sagita
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8245

Abstract

Moringa seed oil is a vegetable oil that has many benefits for health and the pharmaceutical industry. Moringa seed oil can be extracted either chemically or mechanically. This research aims to characterize moringa seed oil’s physicochemical properties and fatty acid composition using soxhletation chemical extraction and screw-pressing mechanical extraction with various pretreatment temperatures of 50, 60, and 70°C. The research showed that the highest yield of moringa seed oil, 41.74%, was obtained at an initial treatment temperature of 70°C using the soxhletation method for 6 hours. The acid value of moringa seed oil from soxhletation is 2.01 mg KOH/g, and screw pressing is 4.37 mg KOH/g. The iodine number from soxhletation was 66.62 mg iod/100g, and screw pressing was 60.27 mg iod/100g. The density of the oil from soxhletation and screw pressing is 0.922 mg/mL and 0.934 mg/mL, respectively, with an oil viscosity of 3.298 cP and 3.424 cP. The results of GC-MS analysis show that moringa seed oil from soxhletation has an oleic acid composition of 40.92%, while the screw pressing has an oleic acid composition of 22.50%. This finding demonstrates the influence of extraction methods on the fatty acid profile, particularly the concentration of oleic acid, a key component of moringa seed oil. These results contribute to understanding how specific extraction techniques can optimize the quality of moringa seed oil.
Antioxidant Activity of Gel Formulations Containing Various Plant Leaf Extracts: A Review Valentin, Diva; Ratnasari, Devi; Az-zahraa, Ailla; Cahyani, Theresia Natalie; Shella, Tasya Permata; Adzkia, Muhammad Adit
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8288

Abstract

Antioxidants protect the skin from the adverse effects of free radicals, which can potentially trigger premature aging and even skin cancer. Free radicals, with unpaired electrons, are highly reactive and can damage cellular structures. However, the high risk of side effects from synthetic antioxidants, such as skin cancer, has increased interest in natural sources. In cosmetic formulations, gel preparations are highly favored because they can optimally and stably deliver active ingredients to the skin. This study employed a literature review method by examining and collecting articles from relevant scientific journals published over the past 10 years (2014–2024), with 13 articles as primary references. The analysis found that several extracts, such as leilem leaf, pandan, and green tea, exhibited strong antioxidant potential, as indicated by low IC50 values, making them ideal as active ingredients in gel formulations. In addition to the type of plant leaves, the effectiveness of these antioxidants is influenced by the extract concentration used, solvent selection during extraction, and the processing techniques employed in formulation.
Profile of Science Literacy Skills of Junior High School Students in Surabaya City Hidayati, Siti Nurul
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8318

Abstract

Science literacy is critical for every student to master because it can train students' ability to think critically, solve problems, and understand scientific phenomena in everyday life. This study aims to describe the initial science literacy skills of students in Surabaya junior high schools. This research design is a survey design with data analysis techniques used descriptive quantitative, namely by analyzing the average percentage of 3 indicators of science literacy competencies, including 1) explaining phenomena scientifically, 2) evaluating and designing scientific investigations, and 3) interpreting data and evidence scientifically. The research instrument consisted of 9 science literacy test questions adopted from the 2015 PISA science literacy test. The subjects of this research were the 8th-grade students of Labschool UNESA 1 Surabaya Junior High School, consisting of 99 students, 44 male and 55 female students. The results showed that the indicators of evaluating and designing scientific investigations and interpreting data and evidence scientifically obtained a moderate category with an average of 42% and 41%. The Indicator of explaining phenomena scientifically still requires additional training because it is included in the low category with an average of 40%. This is due to students' inability to analyze information, conclude, and link theories with tangible phenomena. Based on the study results, it can be concluded that grade VIII students in Surabaya Junior High Schools have moderate science literacy skills with an overall average percentage of 41%.
Utilization of Sang Mamong Leaf Extract (Lantana camara) as an Anti-Head (Pediculus humanus capitis) Lice Shampoo Riskayanti, Yunita; Febrianti, Mutia
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8366

Abstract

Head lice (Pediculus humanus capitis) are a scalp health problem that can attack all ages, especially children aged 3–11 years. Women have a higher risk of infection than men. In Seteluk District, West Sumbawa Regency, a survey of 40 children aged 6–13 years (20 girls and 20 boys) showed that 100% of girls (20 people) had head lice, while only 20% of boys (4 people) who are infected. The high risk in girls is influenced by wearing the hijab from an early age, hot weather, and sweat, which causes hair to become wet, thereby supporting the development of head lice. Head lice cause severe itching that triggers excessive scratching, potentially causing wounds, irritation, scalp infections, and increasing the risk of fever in children. This research aims to prove the effectiveness of sang mamong (Lantana camara L) leaf extract as an anti-head lice (Pediculus humanus capitis) shampoo through quantitative experimental methods. Making sang mamong extract using 60 grams of dry and fine sang mamong, using 450 mL of 96% alcohol for 2 days, then heated at 70 oC to produce sang mamong extract. Data analysis techniques are based on the results of pH measurement tests, foam height tests, and activity tests. The researcher's hair lice activity test results used 1 mL of anti-lice material, dropped evenly on filter paper, and placed in a petri dish. For anti-lice shampoo without using sang mamong leaf extract, the 3 fleas tested showed no change in active flea activity for up to 1 hour, whereas for shampoo containing sang mamong extract it showed different activity for each extract and the most effective flea activity test results were Anti-lice shampoo containing 4% sang mamong can kill 2 head lice, 1 within 4 minutes and 1 within 11 minutes, and this shows that anti-lice shampoo containing Sang mamong extract (Lantana camara L) is still better than the shampoo sold on the market, based on activity tests, market shampoo is only able to make 2 lice immobile in just 30 minutes, then 3 lice move again for up to 60 minutes without showing any change. The pH measurement test shows an average value of 6, and the foam height test produces an average value of 8.5. Based on these findings, sang mamong (Lantana camara L) leaves can produce an effective anti-head lice shampoo. Tests for pH levels, foam height, and flea activity on shampoo made from sang mamong (Lantana camara L) leaves meet the criteria for good quality shampoo. Shampoo trials have been conducted on 3 children and 2 teenagers, showing safe results without irritation. scalp and effectively makes hair lice fall out during use.
The Effect of Implementing Interactive Learning Media Based on Virtual Laboratory on Student Learning Outcomes in Force Topic Naki, Nadrah Pratiwi; Abdjul, Tirtawaty; Nurhayati, Nurhayati; Odja, Abdul Haris; Yusuf, Muhammad; Payu, Citron S.
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8403

Abstract

Learning media is a teaching aid that educators can use to convey lesson material, increase student creativity, and increase student attention during the learning process. This research examines the effect of implementing interactive learning media based on virtual laboratory on student learning outcomes in force topic at SMP Negeri 1 Gorontalo. This research uses an experimental method, and the research design used is a group pre-test and post-test design. The subjects of this research were 30 students in each class divided into three classes: experimental class, replication 1, and replication 2. The data analysis techniques used are normality, hypothesis, and n-gain tests. The results of the hypothesis testing criteria were T-count ≥ T-table with a level of ∝ = 0.05 for the experimental class, replication 1, and replication 2; therefore, Ho is rejected, and Ha is accepted. This is also supported by the acquisition of the course average normalized gain for all sample classes, both experimental and replication classes, which fall into the high and medium categories in the experimental class (0.71), replication 1 (0.70), and replication 2 (0.66). Data analysis shows that the average post-test score for the experimental and replication classes is higher than the pre-test. This indicates that virtual laboratory media improves student learning outcomes in force topics. This research concludes that using interactive learning media based on virtual laboratories can be an effective alternative for improving the quality of science learning in schools.
The Influence of E-Books Through a Differentiation Approach Assisted with Professional Pageflip 3-Dimensions on Student Learning Outcomes on Simple Machines Topic Gimnastiar, Asih Nurbaiti; Abdjul, Tirtawaty; Nurhayati, Nurhayati; Odja, Abdul Haris; Yusuf, Muhammad; Payu, Citron S.
Jurnal Pijar Mipa Vol. 20 No. 1 (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.v20i1.8404

Abstract

This research aims to test the effect of e-books through a differentiated approach assisted by page flip professional 3-dimensions on student learning outcomes on simple machine topics. The research uses a pre-test and post-test control group design involving two classes as samples. Using e-books through a differentiated approach can reduce the problem of unequal distribution of printed books and make it possible to adapt them to each student's learning style because each student has their learning style. This is shown through the hypothesis criteria where the significance value of 0.030 is smaller than the significance level of 0.05, so H0 is rejected, and Ha is accepted. This is also supported by acquiring an N-gain Score value of 0.81 in the experimental class, which meets the high category, and in the control class, 0.51, which meets the medium category. For the N-gain percent interpretation category, the results obtained in the experimental class were 81 in the effective interpretation category, while for the control class, the results were 51 in the less effective interpretation category. This indicates that e-books, through a differentiated approach assisted by page flip professional 3-dimensions, can improve student learning outcomes, especially in simple machine topics. This research concludes that e-books, through a differentiated approach assisted by page flip professional 3-dimensions, can be an effective alternative for improving the quality of science learning in schools.
Analysis of Corn Drying Rack Position on Tray Type Dryer on Drying Rate Sutanto, Rudy; Tira, Hendry Sakke
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 2024
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.v19i5.7027

Abstract

This research aims to determine the drying characteristics of corn kernels using a tray-type dryer, including the moisture content of the corn kernels over time, the mass of the tested corn kernels over time and the drying rate over time. This research uses the experimental method. The drying process uses an incoming drying hot air temperature of 65ºC with an incoming hot drying air speed of 2 m/s, repeated three times until a water content of 14 ± 0.5% is reached. The dryer in this study used four stacking shelves counting from the bottom, which were filled with 500 grams per shelf. This research shows that the further the shelf is positioned from the incoming hot drying air, the lower the drying rate. Vice versa, the closer the drying Shelf is to the incoming hot air, the greater the drying rate. The average decrease in corn kernel mass was 0.95% for shelf 1, 0.93% for shelf 2, 0.90% for shelf 3 and 0.88% for shelf 4 during a drying period of 3.5 hours. The average decrease in water content was 4.4% for shelf 1, 4.29% for shelf 2, 4.15% for shelf 3 and 4% for shelf 4 during a drying period of 3.5 hours. The further the position of the shelf from the hot air dryer, the less air content contained in the material on the shelf can be absorbed by the hot air dryer and vice versa. The average drying rate was 16.8% for shelf 1, 15% for shelf 2, 13.6% for shelf 3 and 12.8% for shelf 4 during a drying period of 3.5 hours at a drying hot air temperature of 65oC with a drying air speed of 2 m/s. The research data analysis results showed that the hot air dryer should not be passed from below but rather from the side. This affects the drying process in the dryer and makes it evener.

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