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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
 109   110   111   112   113 
Implementation of Path Analysis for Modeling the Influence of Organizational Culture on Work Productivity Abdussamad, Siti Nurmardia; Abdussamad, Zuchri; Reza, Widya; Aqmal, Ikhlas Ul
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7037

Abstract

This research aims to determine the significant factors of organizational culture that influence employee performance productivity using a path analysis model by looking at the total direct and indirect influence of sub-variables. Path analysis can describe the magnitude of the influence and significant variables using direct and indirect influences. By adapting to this case, direct and indirect modeling is needed to see the magnitude of the influence of these sub-indicators. Research related to organizational culture has been carried out to see how much influence organizational culture and motivation have on employee performance. The result is that the greater the organizational culture and achievement motivation, the higher the influence on employee performance. This type of research uses a qualitative and quantitative approach. This research uses a questionnaire to collect data, which has been tested for validity and reliability. This research was conducted at the Gorontalo District Health Service in 2022. Respondents used in this research were 57 Gorontalo District Health Service employees. Data analysis using software R. Results of the research show that organizational culture variables and sub-variables, namely artifacts (X1), values ​​(X2), and basic assumptions (X3), significantly influence employee performance productivity (Y). The total effect is calculated using the path coefficient calculation of the significant variables. The total influence of organizational culture in the form of artifacts (X1) on employee work productivity (Y) is 72%, and the total influence of organizational culture in the form of values ​​(X2) on employee work productivity (Y) is 65%. The total influence of organizational culture is in the form of basic assumptions (X3 ) on employee work productivity (Y) of 78%. This shows that the organizational culture variable influences the most significant influence, namely basic assumptions (X3). The Gorontalo district health office can consider the results of this analysis to make further policies regarding which organizational culture priorities will be implemented to increase employee productivity to the maximum.
Analysis of the Phytochemical Performance of the Neem Plant (Azadirachta indica) Sumbawa Phenotype as a Natural Insecticide Azis, Abdul; Syazali, Muhammad; Chaidir, Riri Rimbun Anggih
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7041

Abstract

Excessive use of chemical insecticides on plants has had a negative impact on the environment and human health. To overcome this, the use of plant-based pesticides is an attractive alternative, but not yet fully optimal in Indonesia. This research aims to study the potential use of neem leaf extract (Azadirachta indica) as a plant insecticide, with a focus on local knowledge of the Samawa tribe on Sumbawa Island. Extraction methods and phytochemical analysis were carried out, as well as insecticidal power tests against several common pest species in the area. The research results show that neem leaf extract has the potential to be an effective natural insecticide in controlling pest populations. Factors such as extract concentration and drying method of neem leaves influence its effectiveness. The use of neem leaf extract at a dose of 80 gr/liter has proven to be more effective than the Dane brand of vegetable pesticide at three times the dose. However, the use of synthetic pesticides at the recommended dosage still shows faster and more effective results in controlling pests. This research contributes to the development of environmentally friendly and effective plant protection materials, and expands understanding of the potential of local natural resources for sustainable agriculture.
The Physicochemical Characteristics of Crude Oil Extract Spirulina sp. by Osmotic-Shock Extraction Method Djamaludin, Heder; Chamidah, Anies
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7042

Abstract

Spirulina sp. is a potential microalgae. One of the potentials that continue to be developed, such as edible oil. Various extraction methods can obtain Spirulina oil content, i.e., the osmotic shock method as a green extraction method. Each method used can affect the fatty acid components. Not many studies have reported the physicochemical characteristics of oil extract Spirulina using the osmotic-shock method. This study analyzes the physicochemical characteristics of crude oil extract Spirulina sp. extracted using the osmotic-shock method. The study used a simple, completely randomized design with treatment extraction times of 60, 90, and 120 minutes. The data were analyzed using analysis of variance and Duncan's test (α5%). The results showed that the treatment level of 60 minutes produced the lowest physicochemical characteristics and met the International Fish Oil Standards, where peroxide value 1.49±0.0089 mEq/Kg, iodine value 71.37±0.0035 g I2/g, saponification value 502.69±0.0069 mg KOH/g, acid value 0.049±0.0011 mg KOH/g, and Free Fatty Acid 0.0102±0.0003%. The total concentration of Saturated Fatty Acids is 36.18%, monounsaturated fatty Acids 7.72%, and polyunsaturated fatty Acids 49.41%. The fatty acid components are oleic acid/ω-9, linoleic acid/ω-6, linolenic acid/ω-3, eicosapentaenoic acid, and docosahexaenoic acid. The presence of EPA and DHA in the crude oil extract of Spirulina sp. showed potential for development as edible oil. The physical profile of Spirulina sp. oil extract obtained by the osmotic-shock method meets International Fish Oil Standards.
Development of e-Worksheet Guided Inquiry-Oriented to Train Students' Critical Thinking Skills on Buffer Solution Material Wahyuningtyas, Intan Nanda; Agustini, Rudiana
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7068

Abstract

Research titled Development of a Guided Inquiry-Oriented e-Worksheet to Train Students' Critical Thinking Skills on Buffer Solution Materials aims to produce e-worksheets to train critical thinking skills. This research is development research using the ADDIE model. The research design was a one-group pretest-posttest design. The feasibility of e-worksheet refers to three criteria: validity, practicality, and effectiveness. Validity consists of content validity and construct validity. Validity data is obtained from expert assessments through expert judgment. The results of the validity assessment stated that the e-worksheet developed had met the content and construct validity requirements in all aspects. Practicality data is obtained from students' physical activity observations, nonphysical activity observations, and student response questionnaires. Practicality and effectiveness data were obtained during the pilot test. Practicality data was obtained from observations of physical and nonphysical activities and student response questionnaires. The results of activity observations and learner response questionnaires show that the e-worksheet developed has met the practical criteria. Effectiveness data was obtained from the pretest and post-test results of students' critical thinking skills. The test results show that the developed e-worksheet has met the effective criteria.
Development of KOIN Mobile Learning to Prevent Student Misconceptions on Chemical Bonding Material Oktaviani, Lestari Rachma; Sukarmin, Sukarmin
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7080

Abstract

Chemistry is a relatively tricky science; thus, it must be studied in depth to avoid misconceptions. These misconceptions can be caused by students themselves, teachers, textbooks, material context, and teaching methods. One way to prevent misconceptions is by using learning media that is easy for students to understand. Field facts indicate that chemistry teaching in high schools is still conducted conventionally, and only a few students understand the concepts of chemical bonding. Mobile learning is an interactive multimedia that can enhance students' learning motivation. This research aims to determine the feasibility of using KOIN m-learning to prevent student misconceptions about covalent and ionic bonds. The feasibility of m-learning is reviewed from two aspects: validity and practicality. This study employs the Research and Development (R&D) methodology, utilizing the development model proposed by Sukmadinata. The limited trial was conducted in class XI-MEDITEK of SMA Ta'miriyah Surabaya, with 15 students selected based on the most significant number of students who did not understand concepts in the pretest results. The research data shows that (1) KOIN m-learning is declared valid as indicated by the content validity mode of 4 with category valid and construct validity mode of 4 with category valid, (2) KOIN m-learning is declared practical as indicated by the average results of the student response questionnaire, supported by observations of student activities, of  97.04% with category highly practical, The results indicate that KOIN m-learning is feasible to be used to prevent student misconceptions about chemical bonding material.
Development of a Comic System for Human Digestive Education to Improve Critical Thinking Abilities Pangesti, Yuli Dwi; Andriani, Aldina Eka
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7156

Abstract

The use of technology-based learning media in stories and pictures has not been optimally used by teachers, which causes students' critical thinking skills to be low. This study aims to describe the development design and test the feasibility and effectiveness of Education Comic for the human digestive system to improve the critical thinking skills of SDN Patemon 02 Semarang grade V students. This type of research is research and development (R&D) with the ADDIE model. The stages of ADDIE are as follows: (1) Analyze, (2) Design, (3) Development, (4) Implementation, (5) Evaluation. Data collection techniques used were Test (pretest and post-test) and Non-test (interview, observation, questionnaire, and document data). The research subjects were 20 students in SDN Patemon 02 Semarang class V. The data analysis technique uses normality, t-tests, and N-gain tests. The study results show that (1) The development design of the educational comic uses the Adobe Photoshop CS3 application and Clip Studio Paint with components consisting of a cover, character introduction, reading instructions, materials, and evaluation. (2) The feasibility results of education comics from material experts with 90% of the category are very feasible, media experts are 90% of the category very feasible with the results of the questionnaire responses of students and teachers of 98.56%, 90.55%, and 96.67% respectively with the category of very feasible. (3) the effectiveness of the Education comic is shown from the t-test results obtained a significance value of 0.00, which means <0.05, then the hypothesis is accepted. The improvement in critical thinking skills is shown from the results of the N-gain test of 77.64% with the high category. The conclusion of this study shows that the Human Digestive System Education Comic has been successfully developed, feasible, and effective in improving the critical thinking skills of grade V students of SDN Patemon 02 Semarang.
Green Synthesis Gold Nanoparticles using Bioreductor of Butterfly Pea (Clitoria ternatea L.) Leaf Extract as an Antioxidant Fernanda, Cintya Dita; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7170

Abstract

Gold nanoparticles are inorganic metal materials in suspended solutions with a particle size reduction process to the 5-400 nm nanoscale range. Gold nanoparticles can be synthesized using the green synthesis method using a bioreductor of butterfly pea leaf infusion extract, which can be used as an antioxidant. This study aimed to determine the characteristics of gold nanoparticles using a UV-Vis spectrophotometer and TEM and to determine the antioxidant strength of gold nanoparticles through the IC50 value. This study used 20, 10, 5, and 2.5 ppm concentration variations. The results of the characterization of gold nanoparticles using a UV-Vis spectrophotometer showed a maximum wavelength of 550 nm, and the results of the TEM test showed a particle diameter of 6.58 nm. The antioxidant activity test was carried out using the 1,1-diphenyl-2-picryhydrazyl (DPPH) quenching method, resulting in % quenching at a concentration of 20, 10, 5 and 2.5 ppm of 76.3; 70.6; 85.5; and 92.9% and an IC50 value of 0.25 ppm which is included in strong antioxidants. It can be concluded that gold nanoparticles synthesized using butterfly pea leaf extract have the potential to be an effective antioxidant agent.
Green Synthesis Gold Nanoparticles using Bioreductant Red Shoot Leaf Extract (Syzygium myrtifolium Walp.) and Activity as Antioxidant Farihah, Neni Isna; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7171

Abstract

Gold nanoparticles (AuNPs) are small-sized materials important in various commercial and industrial applications. Several methods have been developed to synthesise AuNPs. This study was conducted by synthesizing AuNPs using HAuCl4 as a precursor and red shoot leaf extract as a bioreductor. The concentrations of AuNPs used were 20, 10, 5, and 2.5 ppm. Characterization of gold nanoparticles at a concentration of 20 ppm was carried out using a UV-Vis spectrophotometer to measure the maximum wavelength and Transmission Electron Microscopy (TEM) to determine particle size. Antioxidant activity at 20, 10, 5, and 2.5 ppm was determined by measuring free radical capture activity using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The results showed that gold nanoparticles had a maximum wavelength of 530 nm with a ruby red color and an average particle size of 14.907 nm. The synthesized AuNPs showed high antioxidant activity: 99.6% (20 ppm), 98.9% (10 ppm), 96.7% (5 ppm), and 91.0% (2.5 ppm), indicating that higher concentrations of AuNPs resulted in more significant free radical scavenging. This study successfully synthesized gold nanoparticles using red shoot leaf extract as an environmentally friendly bioreduction. The resulting nanoparticles have a nanometer particle size with very high antioxidant activity, especially at a concentration of 20 ppm. The method used in this study offers a more environmentally friendly alternative for synthesizing gold nanoparticles, which previously often used hazardous chemicals. The use of red shoot leaf extract as a bioreductor has not been widely reported in the literature, thus providing a new contribution to green nanotechnology. Further research is recommended to explore the potential applications of gold nanoparticles synthesized by this method in medical and other industrial fields. In addition, additional studies are needed to optimize the synthesis conditions and more in-depth characterization of the stability and toxicity of gold nanoparticles in practical applications.
The Influence of PBL Model on Student Learning Outcomes in the Form Changes Concept of Substances Pakaya, Ismail; Abdjul, Tirtawaty; Payu, Citron S.; Yunus, Muhammad
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7196

Abstract

The problem-based learning (PBL) model is the learning model that prepares students to think critically and analytically. This study investigates the effect of the PBL model on students' academic performance related to the form changes concept of substances. The research adopts an experimental approach, utilizing a one-group pretest-posttest design. Data for the study was collected through tests and analyzed using descriptive and inferential statistics, including normality tests, hypothesis tests, and n-gain analysis. The result of the research for the experimental class had an average score of 85.29, replication 1 scored 84.71, and replication 2 scored 82.56. Additionally, the average normalized gain was 0.72 for the experimental class, 0.73 for replication class 1, and 0.69 for replication class 2, which means that the Replication 1 sample class was higher, while the experimental and control classes were currently in the category. Thus, the PBL model affects student learning outcomes by changing the concept of substances. The research of the PBL model on student learning outcomes is expected to be developed in other material concepts.
Development of a Science Teaching Module Based on SSCS in the Living Things Classification Concept Bulilingo, Mohamad Rivaldi; Paramata, Dewi Diana; Latjompoh, Masra; Lamangantjo, Chairunnisah J.; Pikoli, Masrid; Nurhayati, Nurhayati
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 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.v19i4.7197

Abstract

A teaching module is a learning tool or design based on a curriculum applied to achieve predetermined competency standards. This research aims to use the ADDIE development model to produce a science teaching module based on search, solve, crate and share (SSCS) on valid, practical and effective living things classification concepts. This research was conducted at SMP Negeri 1 Molibagu involving 24 students in Class VII C. The study showed that the results of validating the Science Teaching Module (STM) based on SSCS from experts achieved a score of 90%, which was included in the very valid category and suitable for use in learning. The practicality of the STM based on SSCS as shown by the implementation of learning during two meetings with a percentage of 93% and included in the very good category, student response reached 81.2% with very good criteria, and student activity with a percentage of 85.5% with good criteria. The effectiveness of the STM based on SSCS is shown by the results of the analysis of learning outcomes tests by obtaining N-Gain values 0.78 with high criteria. Thus, it is concluded that the concept of STM based on SSCS in the living things classification concept has valid, practical, and effective criteria. The research of STM based on SSCS is expected to be developed in other material concepts.

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