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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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Antioxidant potential of gotu kola leaf extract (Centella asiatica (L.) Urban) as an alternative to antihyperglycemic herbal drinks Ida Ayu Manik Damayanti; Ni Wayan Sukma Antari; Sri Dewi Megayanti
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4179

Abstract

This study aims to determine the antihyperglycemic potential of Gotu kola leaf extract (Centella asiatica (L.) Urban as an alternative herbal drink in diabetic male white mice. This study was divided into four stages: extracting Gotu kola leaves using 96% ethanol as solvent, phytochemical screening, and testing antihyperglycemic activity. Male white mice were made diabetic by alloxan-induced. Mice were divided into five groups consisting of negative control (Aquadest), positive control (Glibenclamide 13 mg/Kg BW), dose 1 (200 mg Gotu kola extract/kg BW), dose 2 (400 mg Gotu kola extract/kg BW), dose 2 (400 mg Gotu kola extract/kg BW), 3 (600 mg Gotu kola extract/kg BW). The results of phytochemical screening showed that the Gotu kola leaf extract was positive for flavonoids and tannins. The analysis results on the Gotu kola leaf extract showed an IC50 value of 80.58 ppm, including strong antioxidant activity. The results of the antihyperglycemic activity test showed that diabetic male white mice were found to have decreased blood sugar levels on days 14 and 21 by respectively 24.3% and 41.6%; 25.4% and 42.3%; 37.8% and 55.3% after administration of Gotu kola leaf extract at P1, P2, and P3.
Development of android-based learning media applications on elements periodic system topics Anisa Pradila; Fajriah Azra
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4205

Abstract

This study aims to develop android-based learning media applications and determine the level of validity. This research was designed using the Plomp development model, which consists of 3 stages: the preliminary research stage, the development stage or prototyping, and the assessment stage. In this study, the authors limit the research carried out to the development stage or prototype, which produces prototype III. The development of this android-based application is expected to assist teachers in overcoming obstacles in making learning media and can be used as one of the learning media that can help students in learning, especially on the material of the periodic system of elements. Nine validators carried out the validation test of the learning media application: six content experts (Padang State University lecturers and teachers of SMAN 12 Padang) and three media experts (Lecturer of Engineering Padang State University). The data obtained from the validator was then analyzed using Aiken's V. The product validation test results had an index of 0.877 from content experts and 0.955 from media experts in the valid category. Thus, based on the validation test results, the Android-based learning media application on the developed periodic system material is valid.
The implementation of virtual home laboratories to improve students psychomotor abilities Hesti Noviyanti; Yusro Al Hakim; Eko Setyadi Kurniawan; R. Wakhid Akhdinirwanto
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4210

Abstract

Psychomotor relates to learning outcomes that are achieved through skills as a result of knowledge competence. Learning that still uses the demonstration method and has not optimized learning activities in the laboratory. This study aims to determine how implementing a virtual home learning laboratory improves students' psychomotor abilities. This study uses a quasi-experimental method with a nonequivalent control group design. The sample used in this study was 46 respondents from the Mathematics and Natural Sciences Department at Senior High School 8 Purworejo, Indonesia. The research sample consisted of two classes: the control and experimental classes. The instruments used in this study were learning implementation sheets, psychomotor observation sheets, student response questionnaires, and students' psychomotor ability test instruments. The data analysis technique in this research is quantitative, and the t-test. The analysis of test data using the N-gain test obtained 0.75 for the experimental class with high category and 0.29 for the control class with low category results. The statistical analysis results of the independent sample t-test show that laboratory implementation affects the psychomotor abilities of students.
Validity of guided inquiry-based chemical equilibrium e-module integrated with the Al-Quran for Madrasyah Aliyah Haura Habiba; Iryani Iryani
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4215

Abstract

This study aims to determine the validity of the guided inquiry-based chemical equilibrium e-module integrated with Al-Quran for class XI Madrasyah Aliyah. The type of research is developmental research (Educational Design Research) using the Plomp development model, which consists of a preliminary research stage, a prototype stage, and a field test. The research instrument used was a validation questionnaire comprised of a content validation questionnaire and a media validation questionnaire. The content validation questionnaire assessment was carried out by material expert validators consisting of Padang State University Chemistry Lecturers and MAN 2 Padang Teachers. The media validation questionnaire assessment was carried out by media expert validators consisting of Padang State University Chemistry and Informatics Engineering Lecturers. Based on the results of processing the media and content validation questionnaire data using the Aiken V formula, the average value of content validation is 0.88 in the valid category, and the media validation average value is 0.91 in the valid category.
Development of live worksheets assisted diagnostic assessment instruments to measure understanding of science concepts prospective elementary school teachers Hasnawati Hasnawati; Muhammad Syazali; Arif Widodo
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4217

Abstract

Understanding the material's content is one of the main competencies a teacher must possess, so it is necessary to diagnose the extent of understanding the level of understanding of science concepts for prospective teachers. This study aims to produce a valid and practical diagnostic assessment instrument assisted by live worksheets to measure the level of understanding of science concepts for elementary school teacher candidates. This research is development research using a 4-D model (define, design, develop and disseminate). In the define stage, science concepts that are difficult to understand for prospective elementary school teacher students have been identified, namely the material of temperature and heat, electricity, magnetic fields, and the solar system. The next stage is to design the right instrument to diagnose the level of understanding of science concepts for elementary school teacher candidates, namely a diagnostic instrument with three-level multiple choice questions integrated into the live worksheet application. Furthermore, in the development stage, the questions pay attention to the final abilities expected to be achieved in students based on the semester learning plans for special science education courses on materials identified at an early stage. The instrument that has been developed is then tested for validity and practicality. The validity test results obtained an average score of 3.8 which means the instrument is very valid, and the results of the practicality test show a practical instrument with an average score of 3.5. The final stage of this research is dissemination, namely the process of disseminating research and development products in the form of diagnostic assessment instruments assisted by live worksheets to measure the level of understanding of the science concepts of elementary school teacher candidates that have been developed. In conclusion, the live worksheet-assisted diagnostic assessment instrument developed is valid and practical for measuring the level of understanding of elementary school teacher candidates.
Effectiveness of rub ash waste as adsorbent household waste water Eka Junaidi; I Nyoman Loka; Syarifa Wahidah Al Idrus; Baiq Fara Dwirani Sofia
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4225

Abstract

This study aims to determine the effectiveness of rice husk ash as an adsorbent to reduce phosphate levels in household wastewater and inexpensively. This research is an experimental laboratory research using the spectrophotometric method. Research data can be obtained through a series of experimental stages, including 1). Preparation of phosphate standard solution curve, 2). Determination of phosphate content before and after passing the adsorbent for the analyzed sample, 3). Determine the effectiveness of adsorbents in reducing phosphate levels in household wastewater. The effectiveness of rice husk ash as an adsorbent can be determined by comparing the phosphate levels before and after household wastewater is passed to the adsorbent. The magnitude of the reduction in phosphate content indicates the amount of phosphate adsorbed on the ash. Based on the experimental results, it is known that phosphate can be measured using a UV VIS Reign 1900 spectrometer at a wavelength of 693 nm. The standard phosphate solution curve was made based on the absorbance measurement of the series of standard phosphate solutions (0, 2, 4, 6, 8, and 10 ppm) used. In this study, the curve of the standard phosphate solution has the line equation: Y = 0.1723 X + 0.3823 with a correlation coefficient of 0.8633. In the equation of the line, Y indicates the absorbance value of the sample read on the spectrometer, while X indicates the concentration value of the substance being analyzed. Based on the equation of the curve line of the standard phosphate solution, it is used as a reference in determining the phosphate content of the sample by interpolating the absorbance that is read on the spectrometer owned by the sample and then determining the concentration value. Based on the calculation results, it was found that the ability to rice husk ash as an adsorbent to reduce phosphate levels in household wastewater was, on average, 52.54%. The ability of rice husk ash is still relatively small compared to the ability of rice husk ash as an adsorbent on heavy metals. In addition, phosphorus (P) as a constituent of phosphate has a smaller size (P diameter = 1.00) when compared to silica (diameter = 1.10), which is the largest composition in the ash. The difference in the size of the radius of phosphorus is smaller than that of silica. It is suspected as one of the causes of the phosphate content retained in the rice husk ash as an adsorbent is not too large. However, the percentage value of rice husk ash to reduce phosphate levels is still considered quite good as an adsorbent if the goal is to reduce phosphate levels from household wastewater that is discharged directly into the environment.
Analysis of independence and creative thinking skills of students through assignment Kusmiyati Kusmiyati
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4232

Abstract

This study aims to describe students' independence and creative thinking skills through assignments. The subjects of this research are Biology Education students who take the Nutrition Science elective course as many as 20 people. Independence and creative thinking data were collected using an instrument with a Likert scale. The collected data were analyzed qualitatively into five categories. The results of the independence analysis showed as many as 16 students (80%) in the very good category and 4 students (20%) in the good category. The results of the creative thinking analysis showed as many as 13 students (65%) in the very good category and 7 students (35%) in the good category. It can be concluded that most of the students completing lecture assignments have independence and creative thinking skills in the very good category. The achievement of independence on the indicators of not depending on others, self-confidence, self-initiative, and self-control, each student varied from fairly good, good, and very good categories. Meanwhile, the achievement of independence for the indicators of discipline and responsibility varies in the good and very good categories. (c) The achievement of all indicators of students' creative thinking skills varies in the very good and good categories. The very good category was mostly achieved by students on the indicators of flexible and original thinking skills. In contrast, students mostly achieved the good category on the indicators of evaluation thinking skills.
Level of scientific argumentation ability of students in biology learning Lidya Hasmaningsih; Karnan Karnan; Baiq Sri Handayani
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4242

Abstract

Scientific argumentation is one of the skills needed in the 21st century. The purpose of this study was to analyze the level of scientific argumentation ability of students in class XI biology learning using plant tissue material at SMAN 1 Labuhan Haji. The research method used is descriptive qualitative with research instruments in the form of scientific argumentation ability tests, questionnaires, and interviews. The population in this study amounted to 133 people. The sample was selected using the census technique so that it used a saturated sample or all members of the population, namely class XI MIPA 1, XI MIPA 2, XI MIPA 3, and XI MIPA 4. The results showed that the student's written and oral scientific argumentation skills were still low and needed to be empowered again. Students' written scientific argumentation ability is at level 2 with a percentage of 74.9%, and oral scientific argumentation is at level 2 with a percentage of 73%.
Practicality of learning devices in problem-based learning implementation in contextual teaching and learning approach Abdulrahman Djou; Trisnawaty Junus Buhungo; Supartin Supartin; Asri Arbie
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4245

Abstract

This study aimed to describe the practicality of physics learning tools with a problem-based learning model with a contextual teaching and learning approach. The research was conducted at Muhammadiyah Batudaa high school, and the research sample used was class XI using a simple random sampling technique. This development research uses the ADDIE model developed by Reiser and Mollenda, which consists of the analysis, design, development, implementation, and evaluation stages. The practicality test is carried out at the implementation stage. The results showed that the average percentage of the implementation of learning carried out for two meetings using a problem-based learning model with a contextual teaching and learning approach reached 97.619% with very good criteria. Then for teacher responses, 100% agreed through a teacher response questionnaire, and for student responses, 83% gave positive responses through student response questionnaires. In conclusion, physics learning tools that use a problem-based learning model with contextual teaching and learning approaches are practical to be applied in the physics learning process.
Effectiveness of e-module based on guided discovery learning on learning outcomes of high school students Alysa Luthfiani; Yerimadesi Yerimadesi
Jurnal Pijar Mipa Vol. 17 No. 6 (2022): November 2022
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.v17i6.4252

Abstract

This study aims to analyze the effectiveness of e-module colligative properties of solutions based on guided discovery learning in improving high school student learning outcomes. The research was conducted on class XII students in a public high school space (MAN 1 Padang) with 36 students. The type of research used is quasi-experimental. The research design was a randomized control-group pretest-posttest design, and data analysis used a t-test. The sample was taken by a simple random sampling technique. The level of effectiveness of the e-module is analyzed from the results of the n-gain value. It obtained an n-gain value of 0.71 in the high category. In conclusion, guided discovery learning based on the chemistry e-module effectively improves student learning outcomes with high criteria. Keywords: Effectiveness, E-Module, Guided Discovery Learning, Learning Outcomes.

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