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Dea Santika Rahayu
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INDONESIA
Indonesian Journal of Science and Education
Published by Universitas Tidar
ISSN : 25985213     EISSN : 25985205     DOI : https://doi.org/10.31002/ijose
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Chemistry Materials Science & Nanotechnology Physics
Indonesian Journal of Science and Education published a scientific paper on the results of the study and review of the literature in the science and education. In detail, the scopes of this journal are research in 1) Science education; 2) Biology education; 3) Physics education; 4) Chemistry education; 5) Science Educational Technology; 6) Environmental science; 7) Physics; 8) Chemistry; and 9) Biology.
Arjuna Subject : Umum - Umum
Articles 94 Documents
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Potential Utilization of Lamtoro Leaves (Leucaena leucocephala) as Natural Coagulants Riva Ismawati; Rina Rahayu; Rizqa Puspitarini
Indonesian Journal of Science and Education Vol. 7 No. 1 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i1.566

Abstract

Water is a vital element for human beings. However, there are still limited clean water services in Indonesia. Raw water treatment is needed to ensure the availability of clean water. One of the methods is by using the coagulation process. The coagulant functions to speed up the coagulation process. Although effective in water treatment, chemical coagulants have some disadvantages. Therefore, it is necessary to develop natural coagulants to overcome the weakness of chemical ones. Natural ingredients can be used as coagulants if they have many macromolecules. Lamtoro leaves are one of the natural materials that are only used to feed the animal. This research aims to examine the potential of lamtoro leaf as a natural coagulant in terms of its content. The research is conducted by testing lamtoro leaf powder using Fourier Transform Infrared Spectroscopy and proximate test. Infrared spectra of lamtoro leaves show the presence of absorption peaks for specific groups of carbohydrate and protein compounds. The proximate test results show that lamtoro leaves contain 24.7% protein and 53.71% carbohydrates. The high protein and carbohydrate contents in lamtoro leaves enable them to be used as a natural coagulant.
Identification of Students' Misconceptions using Four-Tier Diagnostic Assessment in Physics Learning Phase F Agung Prastyo; Hanun Fithriyah; Alma Dias Rahmawati; Elvin Yusliana Ekawati
Indonesian Journal of Science and Education Vol. 8 No. 1 (2024): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v8i1.569

Abstract

This research aims to identify students' misconceptions about momentum and impulse material using a four-tier diagnostic assessment instrument to implement learning evaluation in the Merdeka curriculum. This type of research is descriptive with a qualitative approach, with data collection techniques carried out through assessments and interviews. Interview data is used to reinforce assessment data. The instrument used in the study is a four-tier diagnostic test on momentum and impulse developed by the researchers. The results showed that 50% of students experienced misconceptions about momentum matter due to the assumption that if two objects move with the same kinetic energy should have the same speed so that the momentum of both objects can be determined by ignoring their velocity. Then, as many as 13. 9% of students experience misconceptions about the law of conservation of matter momentum because of students' assumptions that ignore direction on velocity vector quantities. In other physics concepts, some students are less careful in calculations. The results of this study are expected to be a reference for teachers in designing more meaningful Merdeka curriculum-based learning plans to help students better understand the concepts of momentum and impulse.
Implementation of Inquiry Learning Model with STEM Approach to Improve Student Science Literacy in Environmental Pollution Materials Aulia Rahman
Indonesian Journal of Science and Education Vol. 7 No. 1 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i1.581

Abstract

The study aims to improve the learning process that has been carried out with the aim of increasing students' scientific literacy on environmental pollution topic using the inquiry learning model with a Science, Technology, Engineering, and Math (STEM) approach. This research is Classroom Action Research (CAR). The subjects of this study were 34 students in class VII Semester 1 of 2022 at SMPN 6 Lembah Gumanti, Lembah Gumanti District, Solok Regency. This study consisted of 2 cycles with 4 stages, namely: planning, implementation, observation and reflection. Data collection techniques in this study are preliminary data, observations and written tests to measure scientific literacy skills in the form of knowledge (knowledge), competence (competences), and context (context) aspects collected using science literacy ability tests while attitude (attitudes) data is collected by using angket. Based on the results of the research carried out, the average score at cycle I was 67,06 and at cyclus II 85,88 so it can be concluded that the inquiry learning model with the STEM approach can improve student science literacy on environmental pollution materials
The Effect of Project Based Learning Model on Science Literacy Skills of Grade V Elementary School Students Musfika Ali
Indonesian Journal of Science and Education Vol. 8 No. 1 (2024): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v8i1.727

Abstract

This study aims to see the effect of project-based learning model in improving science literacy skills of elementary school students. This study used a non-equivalent control group research design with 56 samples divided into experimental and control groups. The instruments used were science literacy tests and observation sheets. The results of the pretest and posttest mean difference test of the control group using paired sample T-test. The results of data calculation obtained Sig. (2-tailed) of 0.000, p<0.05, so it can be concluded that there is a difference between the pretest and posttest results in the control group. The results of this test indicate that the treatment given to both the experimental and control classes has an effect on science literacy skills. It is concluded that the project-based learning model can effectively improve students' literacy skills based on the research conducted. The results of the analysis of science literacy skills of students whose learning uses project-based learning are higher than students who do not use project-based learning.
The Effect of Using Ice Breaking on Learning Motivation of Elementary School Students in Learning Science Riska Putri Taupik
Indonesian Journal of Science and Education Vol. 7 No. 2 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i2.735

Abstract

This research was conducted due to the low learning motivation of elementary school students in participating in class learning, especially in science learning. One of the causes of low learning motivation is the lack of interesting innovations in learning, so that students tend to get bored and bored in learning. This low motivation results in low scientific literacy abilities of students. This study aims to determine the effect of using ice breaking on students' learning motivation and scientific literacy abilities. This research was conducted in an elementary school in a district in West Sumatra. This type of research is quantitative in the form of a quasi-experimental design. The data analysis used quantitative analysis using the Paired Sample T-Test. Based on the pretest results, the average motivation score of the experimental class that applied Ice Breaking was 49.842 and the post-test motivation score of the experimental class was 82.631. Based on the results of hypothesis testing conducted with the Paired Sample T-Test, tcount = 3.8421 and ttable 2.028 with a significant level of 5%. Thus t'count = 3.8421 > ttable = 2.028, it can be concluded that there is an effect of using Ice Breaking on Learning Motivation of Elementary School Students in Learning Science.
Analysis of VAK Learning Styles of VIII Grade Students in Science Nailatus Sholihah Nailatus Sholihah; Erna Wijayanti
Indonesian Journal of Science and Education Vol. 7 No. 2 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i2.758

Abstract

Science learning is a process that is intentionally designed to facilitate the process of learning science. Based on initial observations made by researchers, it is known that MTs Nahjatus Sholihin students have not understood their respective learning styles, so students have been unable to maximize them in the science learning process. This study aims to analyze the VAK (Visual, Auditorial, Kinesthetic) learning styles of VIII-grade students in science subjects at MTs Nahjatus Sholihin, Rembang Regency. This research is quantitative descriptive research. The subjects of this study were all VIII-grade students at MTs Nahjatus Sholihin, with a total of 86 students. This study used the total sampling technique. Data collection methods were carried out through observation, questionnaires, and documentation. Based on the results of observations, it is known that from each class VIII that was analyzed for learning styles, the highest percentage of students had a kinesthetic learning style, with a percentage of 45% in class VIIIA, 40% in class VIIIB, and 41% in class VIIIC, while the lowest percentage of students had a visual learning style with a percentage of 22% in class VIIIA, 29% in class VIIIB, and 28% in class VIIIC.
The Optimization of Chlorophyll Extraction from Ulva Sp. with Ultrasound-Assisted Liquid Biphasic Systems Method Susilowati; Fakhri Arkaan Humaidi; Boy Fachri; Bekti Palupi; Meta Fitri Rizkiana; Istiqomah Rahmawati; Helda Wika Amini
Indonesian Journal of Science and Education Vol. 8 No. 1 (2024): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v8i1.1085

Abstract

Ulva sp. is a type of green algae that is easily found in the shallow seas of Indonesia and contains various bioactive compounds. Chlorophyll is a bioactive compound that functions as a natural dye, free radical scavenger, and antioxidant in the body. Chlorophyll extraction with conventional methods requires a relatively long time and large amount of solvent. In this research, chlorophyll extraction from Ulva sp. with the Ultrasound-Assisted Liquid Biphasic System (UALBS) method. Ulva sp. as much as 2.5 grams mixed in acetone solvent, added K2HPO4 solution, and carried out the sonification process in a dark room. The extraction process performs at a parameter range of 5-15 minutes, ratio 0.05-0.1 g/mL, and 60-100 mesh particle size. The extracted filtrate was added with petroleum ether and distilled water to form a biphasic condition. The extracted chlorophyll was analyzed with chromatography and spectrophotometry method. Antioxidant activity was analyzed using the DPPH method. The optimum result of Ulva sp. chlorophyll extraction at an extraction time of 10 minutes, the ratio of solids to solvent was 0.1, the particle size of 60 mesh produced a yield of 1.88% with chlorophyll a 20.13664%, chlorophyll b 21.58672% and total chlorophyll 41.71012%, and the percentage inhibition 45.32%.
Efectiveness of Cooperative Learning Model Type Learning Together (LT) on Learning Outcomes and Creativity of Students on Acid-Base Material Setia Rahmawan; Elisa Yuliana
Indonesian Journal of Science and Education Vol. 7 No. 2 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i2.1095

Abstract

This study aims to determine the effectiveness of Learning Together (LT) type cooperative learning model on learning outcomes and creativity of students on acid-base material in class XI MIPA SMA Muhammadiyah 3 Yogyakarta. The population of this study were all students of class XI MIPA SMA Muhammadiyah 3 Yogyakarta which amounted to 93 students and divided into 3 classes, namely class XI MIPA 1, XI MIPA 2, and XI MIPA 3. The samples of this study were class XI MIPA 2 as the control class and class XI MIPA 3 as the experimental class, each class consisting of 31 students. This research method is a quasi-experiment. The design used is nonequivalent control group design. Data collection techniques using test questions and filling out questionnaire sheets of students’creativity. Data analysis techniques used are normality test, homogeneity test, and hypothesis testing (Mann Whitney test and independent sample t-test). Based on the results of the Mann Whitney test analysis, the Sig (2-tailed) value of 0.000 <0.05 was obtained, so H0 rejected and H1 was accepted, meaning that the Learning Together (LT) type cooperative learning model was effective on learning outcomes on acid-base material. Based on the results of the independent sample t-test analysis, the Sig. 0.005 < 0.05, so that H0 rejected and H1 was accepted, meaning that the Learning Together (LT) type cooperative learning model is effective on students' creativity in acid-base material.
Bibliometric Methods: Analysis of the Development Potential of Ethnoscience-based Science Literacy Modules in Chemistry Learning Setia Rahmawan; Dea Santika Rahayu
Indonesian Journal of Science and Education Vol. 7 No. 2 (2023): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v7i2.1104

Abstract

There still needs to be more research on the potential analysis of the development of ethnoscience-based science literacy modules in chemistry learning using bibliometric tools. Ethnoscience-based science literacy modules still need to be found and used in chemistry learning. This research aims to analyze the novelty and effectiveness of ethnoscience-based science literacy modules in chemistry learning. The subject of this research is a science literacy module based on ethnoscience in chemistry learning. In this study, the researchers also analyzed articles that have been filtered based on topics based on local wisdom-based science literacy modules. The analysis contains several components: title, year, doi, author, method, outcome, and conclusion. The research uses an approach that uses the method of Systematic Literature Network Analysis (SLNA) assisted by bibliometric tools as the medium used in analyzing the article. The data obtained was many articles from the SCOPUS database, which had previously defined some criteria for capturing it. The criteria are related to the year of publication, keyword, and language selection. The application used in this study is the VOS Viewers application. The results show that research related to ethnoscience-based science literacy modules in chemistry learning is still highly feasible, given the numerous constraints in some schools. However, it should be noted that ethnoscience-based science literacy cannot replace scientific literacy globally because of the global literacy capabilities needed in everyday life.
Using Electrical Charge Method to Understand Biochemical Reactions Pong Kau Yuen
Indonesian Journal of Science and Education Vol. 8 No. 2 (2024): Indonesian Journal of Science and Education
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/ijose.v8i2.1351

Abstract

Redox reactions are important in many physiological processes. Oxidation numbers are commonly used for balancing redox reactions and understanding metabolic reactions. When oxidation number cannot be assigned, it is difficult or sometimes even impossible to understand the biochemical redox reactions. This article applies the electrical charge method, which can balance redox reactions when the oxidation number is unknown. It uses H+, O, H2O, and electric charge as balancing devices. This method allows the net-charge to be quantified, redox terms to be defined, and metabolic redox reactions to be classified and understood. The net-charge is also a new electron-counting parameter for understanding biochemical redox reactions.

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