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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 30 Documents
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Search results for , issue "Vol. 19 No. 2 (2024): March 2024" : 30 Documents clear
Effectiveness of Giving Bokashi and NPK Fertilizer on Growth of Long Beans (Vigna sinensis L.) Raksun, Ahmad; Merta, I Wayan; Mertha, I Gde; Ilhamdi, Mohammad Liwa
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6572

Abstract

Various factors influence the growth rate of long beans. One of the external factors that determines the growth rate of long beans is the availability of nutrients on agricultural land. The nutrient content of the planting medium can be increased by applying fertilizer. Research has been conducted on the effectiveness of bokashi and NPK fertilizer on the growth of long beans. The study aimed to determine the effectiveness of giving bokashi on the growth of long beans. Effectiveness of NPK fertilizer application on long bean growth. Effectiveness of the interaction of bokashi and NPK fertilizer on long bean growth. The research was designed in 2 factors, and data analysis used analysis of variance. Data analysis showed that giving bokahi effectively increased the number of leaves, plant height, and length but did not increase leaf width. The application of NPK fertilizer was effective in improving all measured parameters.
Analysis of Students Basic Teaching Skills on Teaching Practice of Micro-Teaching Courses Kusmiyati; Merta, I Wayan
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6579

Abstract

Basic teaching skills are skills that prospective teacher students must have. This research aims to determine the level of basic teaching skills in teaching practice among Biology Education students taking the Micro Teaching course in class A group B in 2022/2023. Data was collected from observations of student teaching practices through peer teaching. The instrument used is an observation sheet derived from indicators of eight aspects of basic teaching skills, with answer choices using a Likert scale. The data was analyzed descriptively by calculating the average score obtained by each indicator on the eight aspects of basic teaching skills observed. The observation results show that students' average in all aspects of basic teaching skills is very good. In contrast, the results of observations on the indicators for each element of skills show categories that vary from quite good, good, and very good. It can be concluded that students have been able to apply the eight aspects of basic teaching skills in teaching practice very well. However, if we look at the indicators for each aspect of skills, there are still students in the quite good and good categories.
Development of Interactive E-Module Based on Inquiry Learning to Enhance IPAS Learning Outcomes for Students Public Elementary School Ramadhani, Arum Ayu; Andriani, Aldina Eka
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6587

Abstract

The purpose of this study was to develop and test the feasibility and effectiveness of an Interactive E-Module based on Inquiry Learning teaching materials on improving the cognitive learning outcomes of IPAS for fourth-grade students of SD Negeri Tambahagung 03 Pati Regency. This type of development research is Research and Development (R&D) using the ADDIE development model. The novelty of this research is the development of material on the Human Sensory System in teacher books and student books based on an innovative learning model, namely Inquiry Learning, which includes interactive edugame evaluations. The results showed the feasibility of media experts with a score of 89.0635% in the very feasible category and material experts with a score of 91.23% in the very feasible category. This is supported by a teacher-response questionnaire of 97.5% and a student-response questionnaire of 93.73%. The effectiveness of Interactive E-Modules based on Inquiry Learning based on the cognitive learning outcomes of students has increased with a normality test analysis, which shows that pre-test and post-test data are typically distributed. The results of the T-test calculation show that there is a significant difference between the pre-test and post-test learning outcomes with the acquisition of a medium category average through the N-Gain test. The conclusion of the research on the development of inquiry learning-based interactive e-modules was successfully developed, and it was very feasible and effective for improving the cognitive learning outcomes of IPAS fourth-grade students of SD Negeri Tambahagung 03 Pati Regency.
Microstructure Characterization of Whey Films Using Different Concentrations of Chia Seeds and 35% Sorbitol as Plasticizer Fahrullah, Fahrullah; Kisworo, Djoko; Noersidiq, Azhary; Bulkaini, Bulkaini; Yulianto, Wahid; Wulandani, Baiq Rani Dewi; Maslami, Vebera
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6589

Abstract

SEM testing was used to evaluate the homogeneity of the film, including pores, cracks, and surface structure, as well as to determine the cross-section and surface structure and the homogeneity of the film solution mixture. The study aims to determine the microstructure characteristics of whey film by adding different concentrations of chia seed and 35% sorbitol as a plasticizer. This study employed three treatments: P1 with 0.5% chia seed, P2 with 0.75% chia seed, and P3 with 1% chia seed. The research method used was descriptive, providing a detailed description of the process. The results indicate that adding more polymer increases the viscosity of the film suspension during the gelatinization process. The film's microstructure was determined by the heating and drying process, as well as the contribution of chia seed gel to the whey film structure. All treatments achieved a Homogeneous film microstructure, but the 1% concentration treatment resulted in a swollen surface structure. The chia seed was evenly mixed into the whey protein matrix, resulting in a uniform structure.
Acanthus ilicifolius Leaf Extract Potential as an Alternative Functional Food Beverage Wulansari, Nadya Treesna; Padmiswari, A.A Istri Mas; Harditya, Kadek Buja; Sintyadewi, Putu Rima
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6590

Abstract

This study aimed to identify the active compounds, antioxidants, and antibacterial effectiveness of Acanthus ilicifolius leaves against microbial food-borne diseases as an alternative to functional food beverages. This study was an experimental study using a completely randomized design on a laboratory-scale experiment (in vitro), and the data obtained in this study were analyzed by analysis of variance (ANOVA). The results showed that the phytochemical screening of Acanthus ilicifolius leaves contained metabolite compounds of flavonoids, phenols, and tannins of 1072.44 mg/100g, 2619.64 mg/100 g, and 3205.66 mg/100g, respectively. The IC50 value of Acanthus ilicifolius leaf extract, namely 221.67 ppm, has fragile antioxidant activity. At the same time, the highest inhibition was produced at an extract concentration of 100%. The concentration of Acanthus ilicifolius leaf extract at a concentration of 100% resulted in the highest average inhibition on bacteria of 9.67 ± 0.36 mm and 10.12 ±  1.12 mm, respectively, against Staphylococcus aureus, Escherichia coli, and Salmonella sp. of 6.82 ± 0.15 mm, 6.18 ± 0.02 mm, and 6.19 ± 0.07 mm.
Deli River Water Quality Control In Medan City Using Statistical Methods Quality Control Rizkina, Manisyah; Siregar, Machrani Adi Putri; Batubara, Ana Uzla
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6591

Abstract

Clean water is a type of water-based resource that is of good quality and is commonly used by humans for consumption or in carrying out daily activities. Clean water quality that meets standards/quality is very difficult to obtain because river water quality has been polluted by various kinds of waste from various human activities, so that the potential impact on river quality decreases both in terms of quantity and quality. 70% of the Deli River pollution is solid and liquid waste, domestic waste, industrial waste, and along the Deli River it has affected the quality of the river water. To quantitatively identify air quality, the Statistical Quality Control method can be used. Statistical quality control is a collection of strategies, techniques, and actions taken to ensure that they produce a quality product. The aim of this research is to determine the control of the water quality of the Deli River in Medan City using Statistical Quality Control. Based on the data obtained, the water quality standards of the Deli River in the Sumatra II River Basin Agency from January 2023 - December 2023 have not been statistically controlled because there are several data samples that are out of control. Then, Deli River water quality control was carried out based on graphic control using SQC (Statistical Quality Control). The results of quality control using SQC show that SQC provides different controls, because in SQC TDS control on data on controlled 3 times, while the and R data on DO, the and R data on and and R data for fatty oil are controlled.
Diversity of Grasshopper (Hexapoda: Orthoptera) in the Conservation Area of Kerandangan Natur Park, Senggigi, West Lombok Ilhamdi, Mohammad Liwa; Syazali, Muhammad; Rizki, Baiq Febrian Sari
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6593

Abstract

The Kerandangan TWA conservation area has high biodiversity, but much of it is unknown, including grasshoppers. This research aims to analyze the diversity of grasshoppers in the area. Grasshopper samples were collected on two transects determined purposively. This collection was carried out over two months, namely October to November 2022. Data on species and numbers were analyzed descriptively. This analysis includes abundance, richness index, diversity index, and species evenness index. Our findings show that there are 8 species of grasshoppers from the families Acrididae, Pyrgomorphidae, Catantopidae, and Tettigoniidae. The most abundant species was Stenocatantops splendens, whose proportion was 66.67%. The species richness, diversity, and evenness indexes were 2.06, 1.27, and 0.61, respectively. This shows that grasshopper biodiversity in Kerandangan TWA is relatively low. However, it must be conserved because of its essential role in maintaining regional ecological processes.
Improving Students' Collaboration Skills Using the RADEC Learning Model in Elementary School Science Learning Kiska, Nurul Delima; Haryanto, Eddy; Indryani, Indryani
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6606

Abstract

The learning model has an influence on the success of achieving learning objectives. One of the learning models that can improve the skills of students is the RADEC learning model. The syntax contained in the RADEC learning model can help learner-centered learning, namely Read, Answer, Discuss, Explain and Create (RADEC). Currently, collaboration is one of the learning activities that is very popular with students, where currently collaboration skills are found in the 4C skills of the 21st century, however, there are still many students who are still passive in collaborative learning activities. Science and Technology is one of the lessons in the current independent curriculum. This research aims to improve collaboration skills in students using the RADEC learning model. This research uses a classroom action research (PTK) model which is carried out in two cycles consisting of four stages starting from planning, action, observation and reflection. The implementation of learning in this research was carried out using the syntax contained in the RADEC learning model. The selection of research subjects was carried out through purposive sampling techniques and the research subjects in this study were class IV B students with a total of 32 students. Data collection techniques in research are observation and interviews. The results of this research showed an increase from the implementation of cycle I, namely at meeting one and meeting 2 there was an increase of 6.6% and in cycle 2 at meeting 1 and meeting 2 there was an increase of 13.34%. Based on the results of this research, it can be seen that implementing learning using the RADEC learning model can improve students' collaboration skills in science learning. Based on the research that has been done, it can be said that the RADEC learning model can improve student collaboration skills in the learning process which is marked by the fulfillment of collaboration skill indicators by students.
Application of the Support Vector Regression Method with the Grid Search Algorithm to Predict Movement Gold Price Puspita, Reni; Cipta, Hendra; Aprilia, Rima
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6607

Abstract

Gold is an investment with the smallest risk because it can be sold anytime and anywhere. In Indonesia, gold bullion as an investment product is known for its purity level of 99.99%, namely gold bullion produced by PT. Aneka Tambang (Antam) through its Precious Metals business unit. Apart from its pure production, Antam gold bullion is easier to resell anytime and anywhere because it has an official certificate from the international gold standardisation institution, namely LBMA (London Bullion Market Association), to more easily estimate the value of gold bullion when sold. To overcome this, predictions of future gold prices are needed. In this research, one of the prediction methods is Support Vector Regression with the Grid Search Algorithm. In this method this method will be used to predict the price of gold, which aims to predict and find out the price of gold one year in the future to produce a level accuracy (MAPE) of 5.43% and the prediction of gold prices increasing from 2023-June-01 to 2024-March-23 while experiencing a decline starting in 2024-March-24. Research by examining the relationship between variables, which emphasises data consisting of numbers so that it is analysed based on statistical procedures using the Support Vector Regression method with data sourced from the daily price of gold bullion through PT. Gallery 24 Pawnshops, North Sumatra. Where this method is very well used in predicting by choosing the best kernel used is the linear kernel because, from these three kernels, the best hyperparameters were obtained for predicting gold price movements using a linear kernel with a division for training and testing data of 60: 40. The MAPE value obtained was 5.43.
Determination of Antioxidant Activity in Kombucha of Kecombrang Flower (Etlingera elatior) for the Development of Functional Beverages Sintyadewi, Putu Rima; Fitriani, Pande P. Elza
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 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.v19i2.6616

Abstract

Researchers have widely reported that Kombucha is a probiotic drink with health benefits. Some researchers are innovating to find other kombucha media sources besides tea that contain high bioactive compounds. Kecombrang flowers contain high bioactive compounds and have physiological functions for health, but this plant has not been widely explored for other innovative beverage or food products. This study aimed to determine the optimal fermentation time of kecombrang flower kombucha (Etlingera elatior) to produce the highest antioxidant activity during fermentation. The experimental design used was a complete randomized design (CRD) with 7 variations of fermentation time (days 0, 3, 6, 9, 12, 15, and 18) with a sugar concentration of 10% b/v, and this treatment was repeated four times. In this research, pH, total acid, and total flavonoid tests were also carried out to see the characteristics of the kecombrang flower kombucha drink during fermentation. Data analysis was performed with an ANOVA at P < 0,05. The results showed that the length of fermentation time had a very significant effect (P < 0,01) on the antioxidant activity of Kombucha. These results indicate that the size of fermentation time affects the antioxidant activity of kecombrang flower kombucha. Optimal antioxidant activity was obtained after the kombucha drink was fermented for 6 days, as indicated by the low IC 50 value of 37,73 g/mL, with a pH of 3,7, total acid of 0,33%, and total flavonoids of 5,9 mg/L QE. Based on a research study, kecombrang flower kombucha has strong antioxidant activity (IC50 < 50 ppm), so kecombrang flower kombucha can be used as a choice for functional drinks.

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