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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
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The effect of sambiloto leaf (Andrographis paniculata Nees) extract inhibitor concentration on the corrosion rate of iron in the corrosive HCl medium and well water Febriyandhi Yahya; Ade Trisnawati; Mohammad Arfi Setiawan
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4780

Abstract

Corrosion is a chemical reaction between metal and chemical substances in free air influenced by typographical conditions, climate, and humidity levels around the metal object. If left unchecked, it can cause damage to the metal infrastructure, material losses, and harm in terms of safety and security. Therefore, a way to inhibit corrosion is needed by creating an environmentally friendly inhibitor from natural materials. One of them is by utilizing Sambiloti leaf as a natural inhibitor. Sambiloto leaves contain tannins which can inhibit corrosion well. This study aimed to determine the efficiency of Sambiloto leaves ethanol extract in inhibiting the corrosion rate of metals in the corrosive medium of well water. HCl was soaked for seven days to determine the correlation between the corrosion rate and extract concentration in different corrosive media. Sambiloto leaves were extracted using the soxhletation method using 96% ethanol solution, then distilled to obtain a pure extract. Sambiloto leaf extract was then varied in concentration, namely 1%, 5%, 10%, and 15%. The corrosive medium is well water and HCl, and the metal material used is nails. The results showed that adding Sambiloto extract with a concentration of 15% in both corrosive mediums had the highest inhibitor efficiency values, namely 97.32% in the corrosive HCl medium and 69.3% in the corrosive well water medium. The results of the regression analysis showed that the addition of Sambiloto extract had a significant effect on the corrosion rate in well water media. In contrast, in the HCl medium, the addition of Sambiloto extract did not significantly affect the corrosion rate.
Development of the uno chemical card game as a learning medium on the chemical bonding material for high school student Lilis Dahlianis; Iswendi Iswendi
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4783

Abstract

This study aims to develop chemical uno cards as learning media in class X senior high school in chemical bonding materials that are valid and practical. This type of research is development research using the Plomp model. This research has three stages, namely (1) preliminary research, (2) prototyping stage, and (3) assessment phase. The subjects of this research consist of 5 chemistry lecturers at the Faculty of Mathematics and Science, Padang State University, two chemistry teachers, and 12 students at SMA N 13 Padang for the 2021/2022 academic year. The research instruments used were self-evaluation sheets, one-to-one evaluation interview sheets, content validity questionnaires, construct media, and practicality questionnaires. Data analysis for validity uses Aiken's V formula, and practicality uses the percentage formula. The research results obtained a V value for material validation of 0.92 and media validation of 0.92, which are included in the valid category. The media practicality was obtained from the teacher's response of 96.8% and 94.4% of the students included in the very practical category.
Implementation of PBL-flipped classroom learning model to improve the learning outcomes of junior high school students in human excretion system materials Lyta Adela Rossely; Mohammad Budiyanto; Aris Rudi Purnomo
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4794

Abstract

This study aims to describe the increase in learning outcomes and student responses by applying the PBL-Flipped Classroom learning model in human excretion system materials. The type of research used is pre-experimental design research through one group pretest-postest design. The subjects in this study were involved as a class VIII-D at Junior High School 1 Tugu. The data collection technique was carried out using a knowledge test in the form of multiple choice questions before and after the PBL-Flipped Classroom learning model was applied and student response questionnaires to the application of the PBL-Flipped Learning model. The data analysis technique used is descriptive quantitative. The results of the data obtained were then analyzed in the form of student learning outcomes and student responses. The increase in student learning outcomes can be seen from the N-Gain analysis and paired sample t-test. The increase in student learning outcomes can be seen from the N-Gain analysis and paired sample t-test. The results of the N-Gain test obtained were 0.66, which was included in the medium category. Student learning outcomes have increased significantly, with a significance value of 0.00 < 0.05. The results of the student response were included in the very good category with a percentage of 99%. Based on the facts above, there is an effect of the PBL-Flipped Classroom learning model to improve the learning outcomes of junior high school students on the human excretion system materials.
Implementation of project-based learning models to improve science literacy of junior high school students Durotun Ayu Fauziah; Erman Erman; Enny Susiyawati; Mohammad Budiyanto
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4795

Abstract

This study aims to provide an overview of students' scientific literacy effectiveness through project-based learning (PjBL). The type of research used is pre-experimental design research through one group pretest-postest design. The subjects in this study were 22 students of class VII A in junior high school SMP Negeri 3 Sumberejo, Bojonegoro, in the 2022/2023 academic year. The data collection techniques used were tests and questionnaires. Research instruments are science literacy tests and student response questionnaire sheets. The results were analyzed using the N-Gain and t-paired tests with effect size. The implementation observation sheet and the response questionnaire were analyzed descriptively and quantitatively. The results showed that the science literacy ability of grade VII A students of SMP Negeri 3 Sumberejo increased from an average pretest score of 30.6 to 38,03 at the post-test. Students' science literacy ability is in a low category with an average N-Gain of 0.10 with an effect size of 0.63 in the moderate category. Improving students' science literacy skills is also supported by implementing learning that is carried out correctly. The application of project-based learning received a positive response from students. Students find learning using project-based learning environmental pollution material fun, attractive, and easy to understand and use, helping to understand the concept of environmental pollution and practicing science literacy. The implication of this study's results is that students should practice many scientific literacy questions referred to as indicators of scientific literacy competency.
Study of species richness of grasshopper (ordo orthoptera) in Beriri Jarak, Lombok Island, Indonesia Moh. Liwa Ilhamdi; Muhammad Syazali; Mursidul Almiah
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4798

Abstract

The number of species of grasshoppers (Orthoptera) in Indonesia is very large, but the successfully identified species still need improvement. It then causes many of the existing species to be identified. This study aimed to determine the grasshopper species (Orthoptera) types in the Hamlet of Otak Kebon, Beriri Jarak Village. This exploratory, descriptive research uses a qualitative approach. Sampling was carried out in May 2022 in three habitat types: gardens, fields, and rice fields. Absolute and relative methods were carried out in sampling. The samples obtained were then identified using field guides and available literature to obtain existing species richness data. The results showed that there were 15 species, namely: Valanga nigricornis, Conozoa hyaline, Oedaleus infernalis, Chorthippus brunneus, Trimerotropis pallidipennis, Chorthippus albomarginatus, Ceracris kiangsu, Melanoplus bispinosus, L. migratoria manilensis Meyen, Trimerotropis occulens, Locusta migratoria, Austracris guttulosa, Atractomorpha crenulate, Leptophyes punctatissima, and Gryllus bimaculatus. The species found belong to two suborders, namely Caelifera and Ensifera. The species are divided into four families: Acrididae, Pyrgomorphidae, Tettigoniidae, and Gryllidae. The Acrididae family dominates the existing species. In addition, 13 species were also found that still needed to be recorded in previous studies, bringing the total to 43 species.
Structural equation modeling (SEM) analysis based on UTAUT2 theory on e-commerce adoption Widya Reza; Faradiba Jabnabillah
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4804

Abstract

E-commerce adoption with the UTAUT 2 model is a complex and multidimensional issue that connects multiple dimensions. A statistical method that can explain the relationship between one latent variable and another variable is Structural Equation Modeling (SEM). This study aims to create a structural model of e-commerce adoption using SEM based on indicators in the UTAUT2 theory. The data used in this study is primary data obtained through a survey of MSME actors in Batam City using a questionnaire with the purposive sampling method. The sample used was 200 MSMEs. The analysis results show that the  value on the Behavioral Intention variable was 88.6%, and the Use Behavior variable was 76.8%.  value of 97.4% indicates that the exogenous latent variable strongly affects the endogenous latent variable. The goodness of the fit value suggests that the SEM model in this study can explain empirical data or field data by 83%. The hypothesis testing results are that Behavioral intention significantly affects effort expectancy, facilitating condition, performance expectancy, and price value. Related to indirect effect, variables that affect user behavior through behavioral intention are significantly the variables of effort expectancy, facilitating condition, habit, performance expectancy, and price value.
Self-evaluation using the model goal-free evaluation in physics subjects in high schools: abstract Fitriyanti A. Noho; Masri Kudrat Umar; Ritin Uloli; Abdul Haris Odja; Supartin Supartin; Trisnawaty Junus Buhungo
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4807

Abstract

The research objective is to evaluate the implementation of a self-evaluation program using an aimless model evaluation of physics subjects in high school. The evaluation focused on how the self-evaluation program was implemented using three stages prepared by the evaluators or researchers in this study, namely the planning stage, the implementation stage, and the final result stage. The research subjects were students of class XI, XII, and a physics teacher. The instrument used was a questionnaire containing statements regarding the implementation of self-evaluations carried out by the teacher. The research method uses a quantitative approach with an evaluative type. Data collection techniques using observation and questionnaires. The results of the research on the implementation of the self-evaluation program in physics subjects in high school obtained an average of 81% and above, this figure is included in the very good criteria, and this shows that the program has been successful, but this needs to be continued to be considered and improved to increase student interest in physics.
Students perspectives on switching from online to face-to-face learning environments after the COVID-19 pandemic Masyitha Wahid; Firdaus Firdaus; Nur Amaliah; Ariandi Ariandi; Firman Firman; M. Irfan; Arlinda Puspita Sari; Muhammad Rizaldi Trias Jaya Putra Nurdin‬
Jurnal Pijar Mipa Vol. 18 No. 2 (2023): March 2023
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.v18i2.4809

Abstract

After around two years of having online learning, students in the universities have to come back to face-to-face learning mode as it was before the pandemic. This setting also applied to the biology education study program of Universitas Sulawesi Barat. The current study investigated the students’ perspective on changing online to face-to-face learning after COVID-19. It is a qualitative descriptive study with nine students as respondents from the classes of 2019, 2020, and 2021. The instrument used was an interview guide consisting of indicators regarding online teaching and learning features, assessment, and interactions that students needed to experience in face-to-face settings but would like to. In addition, students' perceptions of the advantages and disadvantages of the shift from online to offline learning were also assessed. The data analysis was performed in three stages: data reduction, data display, and drawing a conclusion or data verification. The result showed that several things they would like to have as it was during online learning were (1) have electronic materials, online-games-based learning, and more time to complete the assignments, (2) get various types of assessments including via online platforms (3) to have online applications or media to discuss learning materials and submit assignments. (4) In addition, for the advantages, the practicums could be conducted in laboratories, they felt more concentrated during offline classes, and became more confident to apply IT skills during offline settings, while the disadvantages were feeling anxious and fear to interacting during offline class and trouble to listen to lecturers’ class while having masks. Overall, students feel face-to-face learning is way more effective and efficient but suggested blended learning as an interesting mode in the learning and teaching implementation.
Formulation and antibacterial effectiveness of fermented soybean husk extracts from industrial waste of tempe as eco-friendly hand sanitizer gel Ayu Larasati; Baiq Nuraini Ayu Pita; Uswatun Hasanah Yarfaryh; Eva Haerani; Murniati Murniati
Jurnal Pijar Mipa Vol. 18 No. 3 (2023): May 2023
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.v18i3.2895

Abstract

This study aims to determine the formulation and antibacterial effectiveness of fermented soybean seed husk extract from tempe industrial waste as an environmentally friendly hand sanitizer gel. This type of research is an experimental study with variations in fermented soybean husk extract concentration, namely 0%, 5%, 15%, 20%, 50%, and 100%. Observational data were tested by analysis of variance ANOVA at a 5% level using Co-Stat software. Suppose there is a significant difference, a further test of Honest Significant Difference (BNJ) (organoleptic test), a further test of Orthogonal Polynomial Method (MOP) (spreadability, pH, viscosity), descriptive analysis test (flavonoid test, homogeneity test, antibacterial activity test is carried out) and test the total number of germs). The results showed that the fermented extract of soybean seed husk was positive for flavonoids, characterized by a bright yellow color change when added with 10% NaOH. The concentration of fermented soybean husk extract significantly affected the hand sanitizer gel's organoleptic properties, dispersion, total pH, and viscosity. Based on the organoleptic test, the panelists preferred the clear gel color in the F1 treatment (0%) and the thick, slightly liquid gel form with a slightly scented soybean husk in the F3 treatment (10%). The concentration treatment of soybean husk fermented extract (50%) was the best treatment based on good homogeneity, total pH 4.35, viscosity 2405 cPs, following SNI No.06-2588, and spreadability of 4.47 cm which was close to hand gel. For commercial sanitizers, the diameter of the inhibition zone against Escherichia coli bacteria ATCC 2922 and Staphylococcus aureus ATCC 2923 is 14 mm and 12 mm.
Analysis of online learning difficulties in biology learning at Senior High School Baiq Indah Komalasari; Dadi Setiadi; Muhammad Yamin
Jurnal Pijar Mipa Vol. 18 No. 3 (2023): May 2023
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.v18i3.3130

Abstract

Research on online learning difficulties during the COVID-19 pandemic has been carried out. The aim is to describe the process and learning difficulties while online learning. This research is descriptive and qualitative. Sampling is done in three ways: interviews, questionnaires, and documentation. The data obtained is reduced, presented, reviewed, and then conclusions are drawn. As a result, the difficulties experienced by students during the process of learning online, namely the difficulty in using WhatsApp and chat group entry, make students unable to focus on learning, difficulties in the form of signals, and learning disabilities-line is a difficulty that is often experienced, learning is difficult because of signal constraints and wasteful internet quota. In conclusion, online learning difficulties are the inability of students to use learning applications such as What tApp, Google Classroom, Google Meet, and Zoom meetings. Some factors that make learning difficult are constrained by unstable signals and a lack of communication between students and teachers.

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