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Jurnal Penelitian Pendidikan IPA (JPPIPA)
Published by Universitas Mataram
ISSN : 24602582     EISSN : 2407795X     DOI : -
Core Subject : Science, Education, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics
Science Educational Research Journal is international open access, published by Science Master Program of Science Education Graduate Program University of Mataram, contains scientific articles both in the form of research results and literature review that includes science, technology and teaching in the field of science. The Science Educational Research Journal is published twice in a year in January and July editions. The editors receive writing in Indonesian or English, either from the university or from outside the university.
Arjuna Subject : -
Articles 6,421 Documents
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Characterization of PVA-Enzyme Coated Indicator Electrodes GA coated again with PVC-KTpClPB-o-NPOE UV-Vis analysis, variable signal analysis, sensor sensitivity and SEM-EDS Abd Hakim S
Jurnal Penelitian Pendidikan IPA Vol. 7 No. SpecialIssue (2021): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7iSpecialIssue.1248

Abstract

This study aims to characterize the phosphate buffer and urease enzymes through UV-Vis and SEM-EDS absorbance spectra using tungsten as an indicator electrode. The method used is a potentiometric biosensor with urease enzyme immobilization technique for urea analyte. A small detection range of 10-5-10-4M has been studied with PVA-enzyme coated indicator electrodes coated with PVC-KTpClPB. On this basis, the researchers increased the detection range by analyzing glutaraldehyde (GA) mixed with PVA-enzyme and o-NPOE mixed with PVC-KTpClPB. The best results of GA mixed PVA-enzyme at GA2.9% UV-Visible analysis. The best results were PVA-enzyme coated indicator electrodes coated with GA coated again with PVC-KTpClPB-o-NPOE SEM-EDS analysis on PVA-enzyme samples 3x coated with GA 1x and PVC-KTpClPB-o-NPOE 1x with o-NPOE variation of 61% and 66%.
Powerful Lipolytic Activity of Fungi Isolated from Coconut and Avocado Flesh on Different pH and Temperature Prapti Sedijani; Dewa Ayu Citra Rasmi; Kusmiyati Kusmiyati; Riska Agustina Anggriani
Jurnal Penelitian Pendidikan IPA Vol. 7 No. SpecialIssue (2021): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7iSpecialIssue.1261

Abstract

Lipase is widely applied in various fields of industries elevating its economic value. The demand for lipase keeps increasing open up working opportunities. Isolates showing lipolytic activity obtained previously are tested for their activity on different pH mediums: 7, 8, 9, and 10; and at different temperatures. The fungi are grown on SDA medium supplemented with Olive Oil, emulsifier, Tween 80, and Rhodamine B. The experiment was made in 3 replicates and is incubated at room temperature of 30oC. Lipase activity was calculated based on the clear zone around colonies observed on day 2 and day 3 after inoculation. The result shows that those isolates are highly active on various pH at RT, and the activity slightly reduces at 30oC. This result suggests that a wide range of their applications are at room temperature when pH is a limiting factor for the applications
Characterization of PVA-Enzyme Coated Indicator Electrodes GA coated again with PVC-KTpClPB-o-NPOE SEM-EDS, FTIR and XRD analysis Abd Hakim S
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.1265

Abstract

This study aims to characterize the tungsten-urea analyte indicator electrode. The method used is biosensor potentiometry with urease enzyme immobilization technique. This indicator electrode was coated with PVA-enzyme coated with glutaraldehyde (GA) 2.9% coated with PVC-KTpClPB- o-NPOE with o-NPOE variation of 61% and 66%. Characterization of coated indicator electrodes using SEM-EDS, FTIR and XRD analysis. A1-4 61% indicator electrode sample coated PVA-enzyme 1x coated with glutaraldehyde (GA) 2.9% 1x coated PVC-KTpClPB- o-NPOE 1x, with o-NPOE 61%. A3-4 61% indicator electrode sample coated PVA-enzyme 3x coated with glutaraldehyde (GA) 2.9% 1x coated PVC-KTpClPB- o-NPOE 1x, with o-NPOE 61%. Likewise, the reasoning of samples A1-4 66% and A3-4 66%. There are four indicator electrodes made with the notation A1-4 61%, A1-4 66%, A3-4 61% and A3-4 66%. The best results were obtained at the indicator electrode sample A1-4 61%, contributing to the urea sensor of the potentiometer cell
Implementation of STEM-Based Learning for Strengthening Science Literacy of Students Ferdinandus Bele Sole
Jurnal Penelitian Pendidikan IPA Vol. 7 No. SpecialIssue (2021): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7iSpecialIssue.1266

Abstract

This study aims to analyze the STEM approach in learning to strengthen the scientific literacy of students. The method used in this research is qualitative research with data collection techniques, namely literature studies. The data collection method is by reading, identifying, and analyzing, then categorizing, classifying, and describing. In this research, the study of relevant journals, articles, are used to find out how to increase students’ science literacy by using STEM in elementary schools.   Based on the results of research, the literature study states that the use of STEM-based learning effectively improves the student's science literacy.  The results of the research analysis showed that the results of the pretest scores of students had low concept understanding in the experimental class and the control class. After being given treatment, the results of the posttest scores showed a significant increase in the experimental class
Synthesis and Characterization of SnO2 Thin Film Semiconductor for Electronic Device Applications Aris Doyan; Susilawati Susilawati; Kehkashan Alam; Lalu Muliyadi; Firdaus Ali; Mohd Mustafa Awang Kechik
Jurnal Penelitian Pendidikan IPA Vol. 7 No. SpecialIssue (2021): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v7iSpecialIssue.1270

Abstract

Synthesis and characterization of SnO2 thin films with various types of doping materials such as aluminum, fluorine and indium have been successfully carried out. This study aims to determine the effect of various types of doping materials on the quality of thin films such as the energy band gap produced. The results showed that the higher the doping concentration, the more transparent the layer formed. In addition, the optical properties of thin films such as band gap energy are affected by the applied doping. The direct and indirect values ​​of the largest band gap energy for the percentage of 95:5% are 3.62 eV and 3.92 eV are found in the SnO2: In thin layer. Meanwhile, the lowest direct and indirect values ​​of band gap energy are in the thin layer of SnO2:(Al+F+In) for a percentage of 85:15%, namely 3.41 eV and 3.55 eV. The greater the amount of doping given, the smaller the bandgap energy produced. In addition, the more combinations of doping mixtures (aluminum, fluorine, and indium) given, the smaller the bandgap energy produced. This shows that the quality of a thin film of SnO2 produced is influenced by the amount of concentration and the type of doping used
The Critical Thinking Skills and Scientific Attitudes of Pre-Service Chemistry Teachers Through the Implementation of Problem-Based Learning Model Dwi Wahyudiati
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.1278

Abstract

This study aims to determine the effect of applying problem-based learning models on critical thinking skills and scientific attitudes of pre-service chemistry teachers in Basic Chemistry 1. This quasi-experimental research uses pre-test and post-test through an unequal control group design. This research has been carried out for 3 months from September-November in 2021 on pre-service chemistry teachers. The data were analyzed using Hotelling's T2 test and the Rasch model. Empirical evidence shows that based on Hotelling's T2 test results obtained a significance value of 0.001 < (0.05) with a partial eta squared value of 0.28 which means Ha is accepted. So, it can be concluded that there is a contribution of problem-based learning models on critical thinking skills and scientific attitudes of students with the contribution of 28%. Another finding also shows that based on the results of the Rasch model test, it shows that in the experimental class the indicators of critical thinking skills and scientific attitudes are mostly possessed the ability to synthesize attitudes towards scientific investigations. The indicators of critical thinking skills and scientific attitudes are least possessed the ability to analyze and chemistry learning experiences. The conclusions of this study include there is a significant effect of the application of the PBL model on students' critical thinking skills and scientific attitudes with a model contribution of 28%, as well as critical thinking skills and scientific attitudes that most students have in the experimental class are analytical skills and attitudes towards scientific investigations.
The Impact of Interest in Learning on the Use of Time to Study Physics Online A Halim; Yusrizal Yusrizal; Lilia Halim
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.830

Abstract

The development of android mobile technology has reduced student interest in learning and this will have an impact on the use of study time. Considering that this phenomenon is important to be studied in more depth, then through this study, it will be investigated the relationship between interest in learning and the use of time. The population of this study were all high school students in the city of Banda Aceh, but due to time and cost constraints, the research respondents were only taken as many as 75 students from 4 high schools in the city of Banda Aceh. Sampling using the proportional sampling method with the consideration that only classes that have implemented subject learning using online media. The data collection instrument used a questionnaire of interest and the use of learning time. Data analysis was carried out in two stages, namely descriptive and inferential analysis. Descriptive analysis was used to obtain the average data, the largest score, and the percentage. While inferential analysis is used to obtain data about the relationship between aspects of interest, aspects of time use with variables of interest and use of time. The results of data analysis showed that the correlation coefficient (r_xy = 0.68) in the high and positive category and the coefficient of determination was 46.24% at a significant level of 0.05. Inference from the results of this study, teachers need to attract students' interest in learning by choosing a model or method that has been proven to be reliable, so that students are willing to manage their study time appropriately and efficiently
Electron’s Position Expectation Values and Energy Spectrum of Lithium Ion (Li^(2+)) on Principal Quantum Number n≤3 Aulia Riski Pratikha; Bambang Supriadi; Rif’ati Dina Handayani
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.840

Abstract

The purpose of this study is to determine the electron’s position expectation values and energy spectrum on the Li2+ ion on the principal quantum number n≤3. This research using literature study methods on quantum mechanics. The expectation values of the electron position and the energy spectrum of the Li2+ ion uses numerical calculations using the Matlab 2019a program. The steps in this research method include: preparation; theory development; simulation; validation of the results of theory development; results of theory development; discussion and conclusion. The results obtained in this study are the electron’s position expectation values and energy of the Lithium ion. The electron’s position expectation values indicates the presence of electrons that often appear around the x-axis by relying on the interval used. The larger the interval, the more constant the electron’s position expectation values will be and towards an almost constant value. From the analysis results, the expectation value varies in positions from  0,0001a0 to 0,1637a0. The electron energy spectrum of the Li2+ ion is inversely proportional to the square of the principal quantum number (n),E1= -122,4 eV ; E2= -30,6 eV ; E3= -13,6 eV
The Development of Science Learning Media Etno-Vlog Fermentation Cencaluk in Riau Raudhah Awal; Minda Azhar; Yohandri Yohandri
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.860

Abstract

Ethno-Vlog is one of the innovations of learning media to convey material to students. The purpose of this study was to develop a product in the form of learning media and to know the quality of its development seen from its validity and practicality in science learning. This research is development research referring to the ADDIE development model, namely Design, development, implementation, and Evaluation. The media is validated by validators, namely media experts and material experts. The data obtained will be analyzed by descriptive percentage. Furthermore, a practical test was conducted on the validated ethno-vlog media, to educators and students as media users. Based on the questionnaire given, the average value of media validation is 86.6% and material validation is 91.6% which is included in the very good category. Furthermore, the practicality test obtained from the responses of educators and students obtained an average score of 85.6% and 87% with a very satisfied category. It can be concluded that the product resulting from this research in the form of ethnoscience integrated cencaluk fermentation ethnolog media is suitable for use in science learning
The Profile of Questioning and Reinforcement Skills of Pre-Service Teachers in Biology Learning of the Tenth Grade Uthary Relanda Regiska; Meilinda Meilinda; Anwar Yenny
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 1 (2022): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i1.899

Abstract

This study aims to find out how to apply the components of pre-service biology teachers’ questioning and reinforcement skills. This study was conducted at UPT SMA Negeri 8 Ogan Ilir. The design used in this study is descriptive research. The instruments used were observation sheets and documentation in the form of video recordings. The application of basic questioning skills was seen from 7 aspects while for the application of advanced questioning skills, it is seen from 5 aspects. As for the application of reinforcement skills, it was seen from 4 aspects. The results showed that there was a difference in the number of applying questioning and reinforcement skills during the learning process. In general, pre-service teachers have implemented all components of basic and advanced questioning skills. However, the components of basic questioning skills of giving turns and distributing questions and advanced questioning skills of increasing interaction among students still rarely appear. Meanwhile, the application of the reinforcement skill components of pre-service teachers has been applied in the learning process but still tends to be monotonous.

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