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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
 102   103   104   105   106 
Effects of Discovery Learning Model Towards Science Process Skills and Learning Retention Olvyana, Annisa; Ermiana, Ida; Astria, Fitri Puji
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 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.v19i1.6394

Abstract

This research aims to determine the effect of the Discovery Learning learning model on science process skills and student learning retention. The population in this study were all 4th-grade students at SDN 6 Cakranegara, totalling 66 students. Samples were taken using a non-probability sampling technique with a saturated sampling type. This research uses a Pretest-Posttest Nonequivalent Control Group Design research design. The instruments used are observation sheets to measure science process skills and multiple-choice test questions to measure learning retention. Analysis in this study used the One-Way ANOVA test with the help of SPSS 21.0 for Windows. The experimental class's average science process skill score was greater than the control class at 77.95%, as was student learning retention at 65%. The statistical analysis results show that the significance value of the influence of treatment on science process skills is 0.000, while the significance value of the influence of treatment on student learning retention is 0.000. So, it can be concluded that H0 is rejected and Ha is accepted, which means a) the discovery learning model influences the science process skills of class IV students, and b) the discovery learning model influences the learning retention of class IV students.
Analysis of Technological Pedagogical Content Knowledge (TPACK) Ability for Prospective Chemistry Teacher Students and Chemistry Teachers: A Literature Review Raihanah, Dinnah; Putri, Nabilah Mustika; Fatmawati, Tri Kurnia; Nurjayadi, Muktiningsih
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 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.v19i1.6395

Abstract

Mastering ICT is a prerequisite for teachers in the 21st century, and this is consistent with the TPACK framework that a teacher or aspiring teacher needs to be equipped with. Technological, pedagogical, and content knowledge (TPACK) is a conceptual framework that combines components that include three types of knowledge that teachers need to master, namely technological, pedagogical, and content knowledge. TPACK is a framework that seeks understanding the relationship between pedagogical and technological knowledge. In TPACK, teachers' knowledge of integrating technology into learning makes learning effective and efficient. This study aimed to observe the Technological Pedagogical Content Knowledge (TPACK) ability of prospective chemistry teachers and chemistry teachers. The research method used a literature study in the form of an analysis of various literature derived from national and international articles in accordance with the research objectives, namely 33 articles on the ability of Technological Pedagogical Content Knowledge (TPACK) of prospective chemistry teachers and chemistry teachers. The results showed that the components of TK, PK, TPK, TCK, and TPACK owned by prospective chemistry teachers and chemistry teachers were in the sufficient category. The TPACK abilities of chemistry teacher candidates and chemistry teachers still need to be improved in several aspects of content mastery, pedagogy, and technology. Developing TPACK abilities requires a long process to acquire new sources of skills and knowledge needed to form professional teachers.
The Graduate’s Portrait of Competence and Technology’s Mastery in Biology Learning Hutasoit, Leonard R.; Kismiati, Dyah Aniza; Setyawan, Danang Budi; Wahyuningsih, Tri; Nurdin, Gusti
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.v19i2.6408

Abstract

This survey research was conducted with the aim of knowing how the portrait of mastery of competence of Open University Biology Education study program graduates as biology teachers also their mastery of technology in learning. The graduates are junior high school teachers and high school teachers. The research sample was taken randomly until a sample of 94 graduates and 47 graduate users were obtained in various regions in Indonesia, such as Bogor, Central Jakarta, Pontianak, Serang, Cianjur, Pekanbaru and Bandung. The instruments used are questionnaire instruments with Likert scales and interview guidelines conducted to graduate users and graduates. Furthermore, the data is analyzed descriptively to get a portrait of mastery of competence and technology in learning. The results of the data analysis showed that the portrait of mastery of competence was categorized as very good / high, which was indicated by a value of 98.94% (graduate self-reflection) and 97.87% (assessment by graduate users). In addition, from the results of the analysis, it is also known that the portrait of mastery of technology in graduate learning is categorized as very good / high with a value of 91.49% (based on graduate self-reflection and assessment by graduate users)
Optimization of Nursing Scheduling in Emergency by Using Genetic Algorithm Hasibuan, Mhd Panerangan; Cipta, Hendra
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 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.v19i1.6412

Abstract

Scheduling nurse duty is one of the problems in health organizations that is quite complicated to solve. Starting from the uncertain number of patients, serious patient illnesses, characteristics of organizational groups, requests for nurses to take time off, and the qualifications and specialization of the nurses themselves are why scheduling in the ER is difficult to optimize. The same thing is being experienced by one of the health institutions, RSUD Dr. Pirngadi. Preparing schedules or determining the number of nurses on duty is still done manually, resulting in a lack of optimization in scheduling and the number of nurses who must be on duty, especially in the emergency department. In solving this problem, an appropriate method is needed so that the process of scheduling and optimizing the number of nurses can be formed properly. This research applies the Genetic Algorithm in optimal emergency department (IGD) nurse duty scheduling. Genetic algorithms, also called search algorithms, are based on the mechanisms of natural selection and genetics. Genetic algorithms are one of the appropriate methods for solving complex optimization problems. This method is good enough to optimize shift scheduling for the Emergency Room Nursing Service in a Hospital. This Genetic Algorithm can be a solution to multi-criteria and multi-objective problems modeled using biological and evolutionary processes. So, the concept of this method can be applied in optimizing the Nursing Service schedule. The results of calculations using the Genetic Algorithm show quite significant comparisons, including several nurses losing their positions and being eliminated by mutation because they could not compete with several other strong individuals.
The Duracy of Fermentation Effect on the Chemical Quality of Kimchi Krai (Cucumis sativus L.) as Probiotics Nafisah, Halimatun; Agustini, Rudiana
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.v19i2.6415

Abstract

This study aims to describe the effect of fermentation duration on the chemical quality of kimchi krai as a food containing probiotics, including total LAB, total titratable acid, pH, antioxidant activity, and level of liking. This research used laboratory experimental methods, and data analysis was done descriptively. Several stages were carried out, including sample making, sample preparation, sample extraction, total LAB test, pH test, total titratable acid test, antioxidant activity test with DPPH method to obtain IC50 value, and organoleptic test. This study used fermentation durations of 8 hours, 16 hours, and 24 hours. The best chemical quality of kimchi krai was obtained in 24-hour fermentation with a total LAB of 6.1x107, pH value decreased from pH 4.75 in 8-hour fermentation to 3.85 in 24-hour fermentation, while for total titratable acid with the highest value of 0.62%, the strongest antioxidant activity with IC50 429.86 ppm. Based on the results, the very weak category includes antioxidant activity in kimchi krai (Cucumis Sativus L.). However, the longer the fermentation process of kimchi krai (Cucumis Sativus L.), the greater the ability to inhibit free radicals.
The Effect of Drying Time on the Antioxidant Properties of Single Black Garlic Powder Sari, Rika; Herdyastuti, Nuniek
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.v19i2.6420

Abstract

Black garlic is a processed product derived from fresh garlic that generally has a taste and aroma that is less preferred. A drying process is employed to increase the attractiveness of consuming black garlic. This study aims to assess the impact of the drying time on the antioxidant activity and content of antioxidant compounds such as phenolics, flavonoids, and tannins in single black garlic. The drying time is expected to yield a single black garlic powder that is more convenient for consumption, whether in capsule form or as an addition to food products. With low moisture content, single black garlic powder has a longer shelf life and high antioxidant activity, potentially commanding a higher market value. In this research, the drying time was carried out on a single black garlic using an oven for 6, 12, 18, and 24 hours. The analysis of the total phenolic content (TPC), entire tannin content (TTC), and total flavonoid content (TFC) was determined using a Uv-Vis spectrophotometer, and each component was measured concerning gallic acid equivalent for TPC, quercetin for TFC, and tannic acid for TTC. Antioxidant activity was determined using the DPPH method, and the outcomes were expressed as IC50 values. The research shows that the extended drying time leads to an augmentation of the antioxidant compound in black garlic. Drying for 24 hours produces significant outcomes, showing potent antioxidant activity with an IC50 value of 37,019 ppm (powerful antioxidant category), total phenolic content value is 44,785 ± 0,033 mgGAE/g, total flavonoid content value is 32,033 ± 0,008 mgQE/g, and total tannins content value is 74,884 ± 0,057 mgTAE/g. Statistical analysis using a one-way ANOVA showed a significant influence of drying time on TPC, TFC, and TTC (p < 0,05). The longer the drying time, the higher the antioxidant activity and the content of compounds acting as antioxidants in black garlic powder.
Synthesis and Characterization of K2O/ACT Catalyst for Biodiesel Production from Beef Fat Waste Putri, Vani Dwi Hani; Samik, Samik
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.v19i2.6421

Abstract

The increasing use of petroleum as fuel has depleted fuel, so alternative fuels such as biodiesel are needed because they are environmentally friendly and come from vegetable and animal sources. Therefore, this article presents biodiesel production from beef fat using a K2O/ACT heterogeneous base catalyst derived from egg shells. The Eggshell becomes a CaO catalyst after 3 hours of calcination at 900°C. The K2O/ACT catalyst was synthesized by impregnating CaO with KOH and characterized using XRD and BET. The K2O/ACT catalyst was compared to the CaO catalyst for transesterification activity under appropriate conditions (reaction temperature 65°C, catalyst loading 3% by weight, oil to methanol molar ratio 1:12, and reaction time 3 hours). The catalytic activity of the catalyst was determined to be 98.40% Fatty Acid Methyl Ester (FAME). The insertion of K2O into the CaO catalyst increases the basicity characteristics, thereby increasing the catalytic activity of transesterification.
Formulation and Physical Quality Test of Body Lotion of Averrhoa bilimbi L. Extract as Anti-Mosquito Agent for Aedes aegypti Eryani, Farica; Miryati, Nanda Riztina; Faulatun, Ike Afni; Gifari, M. Arya; Ramadhan, Fajri; Handayani, Sri Seno
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 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.v19i3.6438

Abstract

Mosquitoes are one of the vectors with a high disease spread compared to several other types of insects. Making a body lotion from Averrhoa bilimbi L. leaf extract is an effort to reduce the spread of Aedes aegypti mosquitoes. Averrhoa bilimbi L. leaves contain secondary metabolite compounds that can be utilized as natural repellants. This study aimed to test the phytochemical compounds, physical quality and repellant power of the body lotion formula of the Averrhoa bilimbi L. leaf extract. The test results showed that the lotion preparation was stable in organoleptic observation and homogeneity test. Repellant activity against Aedes aegypti mosquitoes was conducted for 5 hours. The highest protection power of lotion with Averrhoa bilimbi L. leaf extract was obtained at 76.92% at 4% extract concentration from three formulas.
Effects of Context-Based Teaching Chemistry on Students' Achievement: A Systematic Review Getu, G.tsadik; Mebrahitu, G.kidan; Yohannes, Goitom
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.v19i2.6458

Abstract

This systematic review aims to comprehensively analyze the effect of contextual-based teaching of Chemistry on students' academic achievement. The review includes an analysis of various scholarly articles that have examined the impact of integrating real-world contexts and applications into Chemistry instruction. A total of 10 study articles were selected for further analysis from databases such as ERIC, Scopus, and Google Scholar using a systematic literature review (SLR) method. These studies were thematically organized and reviewed. The interventional context-based (ICB) chemistry study articles employed a range of research designs, including Experimental research method with pre-test-posttest control group design, Experimental research with post-test only design, Quasi-experimental design, and Mixed-method research design, providing a comprehensive examination of the effect of the contextual-based teaching of Chemistry on students' academic achievement. Data analysis methods were utilized, including the independent t-test, one-way t-test, one-way ANOVA or ANOCOA, and MANOVA, to compare means between groups or against specified values. The results of the analysis indicate that context-based chemistry teaching has a positive effect on students' academic achievement. This finding has significant implications for educators, curriculum developers, and policymakers, as it can inform the design of effective Chemistry instruction that enhances students' academic performance. In conclusion, this review highlights the positive impact of contextual-based teaching of Chemistry on student achievement. The findings underscore the importance of integrating real-world contexts and applications into Chemistry instruction. This has implications for educators and policymakers in designing effective teaching strategies to improve students' academic performance in Chemistry. Additionally, the review suggests avenues for future research in this area.
Distance Learning Experience: Unleashing the Power of Peardeck for Post-Pandemic Education Roqobih, Fikky Dian; Astriani, Dyah
Jurnal Pijar Mipa Vol. 19 No. 3 (2024): May 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.v19i3.6463

Abstract

Pear Deck is one of the tools for presenting web-based online slides. This research was implemented on 26 preservice science teachers who have heterogeneous thinking skills. This research examined the improvement of preservice science teachers’ learning outcomes through interactive online learning using Pear Deck after the pandemic era. The instruments used were written tests that were given twice before and after learning. This research was a pre-experimental design including pre-test and post-test design. Data earned was then analysed using an N-gain score and paired t-test but normality and homogeneity test was conducted before it. Data is said to be normally distributed if the Lcount < Ltab, and is said to be homogeneous if the Fcount < Ftab. There was a significant difference between learning outcomes before and after treatment if tcount < ttab. with α = 0,05. Learning with Pear Deck increases the average preservice science teacher’s score. the data were normally distributed, and then a homogeneity test was conducted with the result Fcount = 1,204 and Ftable = 1,955. Which means that Fcount < Ftable. The data were stated as homogenous. Pear Deck has a significant effect on the improvement of preservice science teacher’s learning outcomes. This is proven by the majority of students having high N-gain scores through their improvement on their test before (pretest) and after (posttest) learning. 77,78% of preservice science teacher also belonged to moderate-high increases in their scores. Results of the T-test concluded that tcount=23,10>ttable=2,06 means that H0 was rejected. So, the use of Pear Deck in distance learning had a significant effect on improving preservice science teacher’s learning outcomes.

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