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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. 4 (2024): July 2024" : 30 Documents clear
The Physicochemical Characteristics of Crude Oil Extract Spirulina sp. by Osmotic-Shock Extraction Method Djamaludin, Heder; Chamidah, Anies
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7042

Abstract

Spirulina sp. is a potential microalgae. One of the potentials that continue to be developed, such as edible oil. Various extraction methods can obtain Spirulina oil content, i.e., the osmotic shock method as a green extraction method. Each method used can affect the fatty acid components. Not many studies have reported the physicochemical characteristics of oil extract Spirulina using the osmotic-shock method. This study analyzes the physicochemical characteristics of crude oil extract Spirulina sp. extracted using the osmotic-shock method. The study used a simple, completely randomized design with treatment extraction times of 60, 90, and 120 minutes. The data were analyzed using analysis of variance and Duncan's test (α5%). The results showed that the treatment level of 60 minutes produced the lowest physicochemical characteristics and met the International Fish Oil Standards, where peroxide value 1.49±0.0089 mEq/Kg, iodine value 71.37±0.0035 g I2/g, saponification value 502.69±0.0069 mg KOH/g, acid value 0.049±0.0011 mg KOH/g, and Free Fatty Acid 0.0102±0.0003%. The total concentration of Saturated Fatty Acids is 36.18%, monounsaturated fatty Acids 7.72%, and polyunsaturated fatty Acids 49.41%. The fatty acid components are oleic acid/ω-9, linoleic acid/ω-6, linolenic acid/ω-3, eicosapentaenoic acid, and docosahexaenoic acid. The presence of EPA and DHA in the crude oil extract of Spirulina sp. showed potential for development as edible oil. The physical profile of Spirulina sp. oil extract obtained by the osmotic-shock method meets International Fish Oil Standards.
Development of e-Worksheet Guided Inquiry-Oriented to Train Students' Critical Thinking Skills on Buffer Solution Material Wahyuningtyas, Intan Nanda; Agustini, Rudiana
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7068

Abstract

Research titled Development of a Guided Inquiry-Oriented e-Worksheet to Train Students' Critical Thinking Skills on Buffer Solution Materials aims to produce e-worksheets to train critical thinking skills. This research is development research using the ADDIE model. The research design was a one-group pretest-posttest design. The feasibility of e-worksheet refers to three criteria: validity, practicality, and effectiveness. Validity consists of content validity and construct validity. Validity data is obtained from expert assessments through expert judgment. The results of the validity assessment stated that the e-worksheet developed had met the content and construct validity requirements in all aspects. Practicality data is obtained from students' physical activity observations, nonphysical activity observations, and student response questionnaires. Practicality and effectiveness data were obtained during the pilot test. Practicality data was obtained from observations of physical and nonphysical activities and student response questionnaires. The results of activity observations and learner response questionnaires show that the e-worksheet developed has met the practical criteria. Effectiveness data was obtained from the pretest and post-test results of students' critical thinking skills. The test results show that the developed e-worksheet has met the effective criteria.
Development of KOIN Mobile Learning to Prevent Student Misconceptions on Chemical Bonding Material Oktaviani, Lestari Rachma; Sukarmin, Sukarmin
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7080

Abstract

Chemistry is a relatively tricky science; thus, it must be studied in depth to avoid misconceptions. These misconceptions can be caused by students themselves, teachers, textbooks, material context, and teaching methods. One way to prevent misconceptions is by using learning media that is easy for students to understand. Field facts indicate that chemistry teaching in high schools is still conducted conventionally, and only a few students understand the concepts of chemical bonding. Mobile learning is an interactive multimedia that can enhance students' learning motivation. This research aims to determine the feasibility of using KOIN m-learning to prevent student misconceptions about covalent and ionic bonds. The feasibility of m-learning is reviewed from two aspects: validity and practicality. This study employs the Research and Development (R&D) methodology, utilizing the development model proposed by Sukmadinata. The limited trial was conducted in class XI-MEDITEK of SMA Ta'miriyah Surabaya, with 15 students selected based on the most significant number of students who did not understand concepts in the pretest results. The research data shows that (1) KOIN m-learning is declared valid as indicated by the content validity mode of 4 with category valid and construct validity mode of 4 with category valid, (2) KOIN m-learning is declared practical as indicated by the average results of the student response questionnaire, supported by observations of student activities, of  97.04% with category highly practical, The results indicate that KOIN m-learning is feasible to be used to prevent student misconceptions about chemical bonding material.
Development of a Comic System for Human Digestive Education to Improve Critical Thinking Abilities Pangesti, Yuli Dwi; Andriani, Aldina Eka
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7156

Abstract

The use of technology-based learning media in stories and pictures has not been optimally used by teachers, which causes students' critical thinking skills to be low. This study aims to describe the development design and test the feasibility and effectiveness of Education Comic for the human digestive system to improve the critical thinking skills of SDN Patemon 02 Semarang grade V students. This type of research is research and development (R&D) with the ADDIE model. The stages of ADDIE are as follows: (1) Analyze, (2) Design, (3) Development, (4) Implementation, (5) Evaluation. Data collection techniques used were Test (pretest and post-test) and Non-test (interview, observation, questionnaire, and document data). The research subjects were 20 students in SDN Patemon 02 Semarang class V. The data analysis technique uses normality, t-tests, and N-gain tests. The study results show that (1) The development design of the educational comic uses the Adobe Photoshop CS3 application and Clip Studio Paint with components consisting of a cover, character introduction, reading instructions, materials, and evaluation. (2) The feasibility results of education comics from material experts with 90% of the category are very feasible, media experts are 90% of the category very feasible with the results of the questionnaire responses of students and teachers of 98.56%, 90.55%, and 96.67% respectively with the category of very feasible. (3) the effectiveness of the Education comic is shown from the t-test results obtained a significance value of 0.00, which means <0.05, then the hypothesis is accepted. The improvement in critical thinking skills is shown from the results of the N-gain test of 77.64% with the high category. The conclusion of this study shows that the Human Digestive System Education Comic has been successfully developed, feasible, and effective in improving the critical thinking skills of grade V students of SDN Patemon 02 Semarang.
Green Synthesis Gold Nanoparticles using Bioreductor of Butterfly Pea (Clitoria ternatea L.) Leaf Extract as an Antioxidant Fernanda, Cintya Dita; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7170

Abstract

Gold nanoparticles are inorganic metal materials in suspended solutions with a particle size reduction process to the 5-400 nm nanoscale range. Gold nanoparticles can be synthesized using the green synthesis method using a bioreductor of butterfly pea leaf infusion extract, which can be used as an antioxidant. This study aimed to determine the characteristics of gold nanoparticles using a UV-Vis spectrophotometer and TEM and to determine the antioxidant strength of gold nanoparticles through the IC50 value. This study used 20, 10, 5, and 2.5 ppm concentration variations. The results of the characterization of gold nanoparticles using a UV-Vis spectrophotometer showed a maximum wavelength of 550 nm, and the results of the TEM test showed a particle diameter of 6.58 nm. The antioxidant activity test was carried out using the 1,1-diphenyl-2-picryhydrazyl (DPPH) quenching method, resulting in % quenching at a concentration of 20, 10, 5 and 2.5 ppm of 76.3; 70.6; 85.5; and 92.9% and an IC50 value of 0.25 ppm which is included in strong antioxidants. It can be concluded that gold nanoparticles synthesized using butterfly pea leaf extract have the potential to be an effective antioxidant agent.
Green Synthesis Gold Nanoparticles using Bioreductant Red Shoot Leaf Extract (Syzygium myrtifolium Walp.) and Activity as Antioxidant Farihah, Neni Isna; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7171

Abstract

Gold nanoparticles (AuNPs) are small-sized materials important in various commercial and industrial applications. Several methods have been developed to synthesise AuNPs. This study was conducted by synthesizing AuNPs using HAuCl4 as a precursor and red shoot leaf extract as a bioreductor. The concentrations of AuNPs used were 20, 10, 5, and 2.5 ppm. Characterization of gold nanoparticles at a concentration of 20 ppm was carried out using a UV-Vis spectrophotometer to measure the maximum wavelength and Transmission Electron Microscopy (TEM) to determine particle size. Antioxidant activity at 20, 10, 5, and 2.5 ppm was determined by measuring free radical capture activity using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The results showed that gold nanoparticles had a maximum wavelength of 530 nm with a ruby red color and an average particle size of 14.907 nm. The synthesized AuNPs showed high antioxidant activity: 99.6% (20 ppm), 98.9% (10 ppm), 96.7% (5 ppm), and 91.0% (2.5 ppm), indicating that higher concentrations of AuNPs resulted in more significant free radical scavenging. This study successfully synthesized gold nanoparticles using red shoot leaf extract as an environmentally friendly bioreduction. The resulting nanoparticles have a nanometer particle size with very high antioxidant activity, especially at a concentration of 20 ppm. The method used in this study offers a more environmentally friendly alternative for synthesizing gold nanoparticles, which previously often used hazardous chemicals. The use of red shoot leaf extract as a bioreductor has not been widely reported in the literature, thus providing a new contribution to green nanotechnology. Further research is recommended to explore the potential applications of gold nanoparticles synthesized by this method in medical and other industrial fields. In addition, additional studies are needed to optimize the synthesis conditions and more in-depth characterization of the stability and toxicity of gold nanoparticles in practical applications.
The Influence of PBL Model on Student Learning Outcomes in the Form Changes Concept of Substances Pakaya, Ismail; Abdjul, Tirtawaty; Payu, Citron S.; Yunus, Muhammad
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7196

Abstract

The problem-based learning (PBL) model is the learning model that prepares students to think critically and analytically. This study investigates the effect of the PBL model on students' academic performance related to the form changes concept of substances. The research adopts an experimental approach, utilizing a one-group pretest-posttest design. Data for the study was collected through tests and analyzed using descriptive and inferential statistics, including normality tests, hypothesis tests, and n-gain analysis. The result of the research for the experimental class had an average score of 85.29, replication 1 scored 84.71, and replication 2 scored 82.56. Additionally, the average normalized gain was 0.72 for the experimental class, 0.73 for replication class 1, and 0.69 for replication class 2, which means that the Replication 1 sample class was higher, while the experimental and control classes were currently in the category. Thus, the PBL model affects student learning outcomes by changing the concept of substances. The research of the PBL model on student learning outcomes is expected to be developed in other material concepts.
Development of a Science Teaching Module Based on SSCS in the Living Things Classification Concept Bulilingo, Mohamad Rivaldi; Paramata, Dewi Diana; Latjompoh, Masra; Lamangantjo, Chairunnisah J.; Pikoli, Masrid; Nurhayati, Nurhayati
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7197

Abstract

A teaching module is a learning tool or design based on a curriculum applied to achieve predetermined competency standards. This research aims to use the ADDIE development model to produce a science teaching module based on search, solve, crate and share (SSCS) on valid, practical and effective living things classification concepts. This research was conducted at SMP Negeri 1 Molibagu involving 24 students in Class VII C. The study showed that the results of validating the Science Teaching Module (STM) based on SSCS from experts achieved a score of 90%, which was included in the very valid category and suitable for use in learning. The practicality of the STM based on SSCS as shown by the implementation of learning during two meetings with a percentage of 93% and included in the very good category, student response reached 81.2% with very good criteria, and student activity with a percentage of 85.5% with good criteria. The effectiveness of the STM based on SSCS is shown by the results of the analysis of learning outcomes tests by obtaining N-Gain values 0.78 with high criteria. Thus, it is concluded that the concept of STM based on SSCS in the living things classification concept has valid, practical, and effective criteria. The research of STM based on SSCS is expected to be developed in other material concepts.
Improving Students Critical Thinking Ability Through MABER Media (Multimedia Form of Interactive Energy) in Elementary School Lungdiansari, Nevananda Arica; Riswari, Lovika Ardana; Sekar Dwi Ardianti
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7238

Abstract

This research was conducted because there are learning activities that do not use learning media, especially technology-based; teaching materials still only use books, and still use the lecture method, causing students to get bored easily, and less interested when learning material is explained, causing a lack of knowledge, apart from critical thinking skills. students are still relatively low. The aim of this research is to improve students' critical thinking skills through MABER, which is the learning media used in this research. This interactive multimedia contains material examples of energy and energy changes in everyday life, media in science and technology subjects in grade IV SDN 05 Ngasem Batealit Jepara. This research uses the Pre Experimental Designs type, with a research design namely One Group Pretest-Posttest. Non-test data collection techniques include observation and interviews and test techniques in the form of pretest and post-test questions. The data analysis technique uses the N-Gain test to determine the increase in students' critical thinking by giving pretest and post-test questions with MABER media. Improving the critical thinking abilities of class IV students through MABER media was carried out through One Group Pretest-Posttest research by giving questions according to critical thinking indicators before and after using MABER learning media. The aim was to determine the increase in students' critical thinking abilities. The results of the pretest and posttest were tested using the N-Gain test. This research showed an increase in the critical thinking skills of class IV students by 0.60 in the medium category. In conclusion, the existence of MABER (Interactive Multimedia in the Form of Energy) media has succeeded in improving the critical thinking skills of fourth-grade elementary school students.
Video-Based Laboratories in Physics: A Quasi-Experimental Study on Rotational Dynamics and Critical Thinking Enhancement Romadhon, Dzikri Rahmat; Muslim, M Adam Buchori; Suwarna, Iwan Permana
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7266

Abstract

This study aimed to evaluate the effectiveness of Video-Based Laboratories (VBL) in enhancing critical thinking skills among state Islamic senior high school (Madrasah Aliyah Negeri) students in Hulu Sungai Tengah, Kalimantan Selatan, specifically in the context of rotational dynamics. Using a quasi-experimental design, we compared the performance of an experimental group that utilized VBL with a control group that followed traditional teaching methods. Data were collected through pretest and posttest assessments on critical thinking skills, and various statistical analyses were performed, including the paired samples t-test, Wilcoxon signed-rank test, and Mann-Whitney U test. The findings indicated significant improvements in critical thinking skills for both groups; however, the experimental group demonstrated substantially greater gains. This suggested that VBL, through interactive and hands-on learning methods, effectively enhanced critical thinking skills in physics education. The results underscored the potential of integrating VBL into physics curricula to foster deeper understanding and reflective reasoning. Future research should explore the long-term impacts of VBL and its application in diverse educational settings.

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