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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
 107   108   109   110   111 
Analysis of Students Chemistry Laboratory Literacy in High School Mutiah, Mutiah; Junaidi, Eka; Irawan, Jono
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.v19i3.6785

Abstract

This research aims to identify the laboratory literacy level of SMA/MA students in Mataram City and describe laboratory literacy in 4 aspects: context, content, competence, and attitude, in carrying out practicums in the laboratory. Laboratory literacy measurement techniques through stages pre-lab to measure the ability of the content aspect, namely identifying knowledge initial or basic concepts that support practicum, subsequent stage lab work to measure context aspects, namely problem identification, analysis objectives, and principles of analytical methods for testing scientific ideas, and attitude aspects during practicum. Stagepost lab measuring competency aspects related to data analysis from practicum results as a basis for decision making. The research data was analyzed descriptively. Research results show that value. The average student laboratory literacy in the context and attitude aspects is high, namely 78.22 and 86.8, but for the content and competency aspects, it is still low, namely 54.26 and 54.15. The conclusions of this research are as follows: (1)Ability The average laboratory literacy of SMA/MA students in the city of Mataram is a category enough, namely 67.71. (2) The ability to apply chemistry to real-life problems (Chemical Literacy) can be improved by optimizing the use of laboratories as chemistry learning centers
Integrative Approach to Evaluation of Physical, Chemical and Biological Parameters: Analysis of Mujur River Water Quality Supardiono, Supardiono; Rahayu, Rachmawati Noviana; Nurhidayatullah, Nurhidayatullah
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.v19i3.6786

Abstract

This study uses an integrative approach to evaluate physical, chemical and biological parameters in the analysis of Mujur River water quality. This shows the complexity of interactions between various factors in determining river water quality. The purpose of this study was to understand the integrative impact of such factors on water quality. The research method involves collecting physical, chemical and biological data from the upstream, middle and downstream locations of the Mujur River. The results showed a complex pattern of interaction between physical, chemical and biological parameters that provided a deep understanding of river conditions. The conclusion of this study is the importance of an integrative approach in evaluating river water quality. In the future, it is necessary to implement more effective management measures to ensure the sustainability of the Mujur River and the surrounding ecosystem.
Antioxidant activity of Eucheuma cottonii Seaweed Extracts from Central Mawasangka Waters Megawati, Megawati; Samaria, Siti; Baari, Muhammad Jalil
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.v19i4.6788

Abstract

Eucheuma cottonii is one type of seaweed that has the potential to be an antioxidant. This seaweed grows and is distributed in various waters of Indonesia, especially in Southeast Sulawesi. However, information regarding the antioxidant activity and the compound content of E. cottonii in this area is still limited. Therefore, this research aims to determine the compound and antioxidant activity profile in E. cottonii. The study used laboratory experimental methods. The research stages were preparation (seaweed sampling), extraction, qualitative phytochemical screening, and antioxidant assay. The initial identification of compounds using qualitative phytochemical screening methods with three extraction solvents: ethanol, ethyl acetate, and n-hexane. Meanwhile, the antioxidant test employed the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The results of qualitative phytochemical screening revealed that the seaweed extract of E. cottonii contains saponins, tannins, and terpenoids. The antioxidant assay using the DPPH method indicated that among the three extraction solvents used, ethanol extract exhibited a very strong antioxidant activity (with an IC50 of 30,036 ppm), compared to ethyl acetate extract (IC50 of 182,179 ppm) and n-hexane extract (IC50 of 641,454 ppm). This study concluded that E. cottonii seaweed has the potential to be developed as a source of natural antioxidants or raw material for the discovery of antioxidant medicines in the future.
Implementation of Problem Based Learning Models to Improve Learning Outcomes of Plant and Animal Cell Structures Kusmiyati, Kusmiyati; Wibawa, I Made Ari; Mulyanthi, Dewi Iryani
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.v19i3.6797

Abstract

Various learning problems teachers face in schools must be solved with alternative solutions supporting 21st-century learning, which develops student-centered learning and provides a problem-solving experience in the real world. The Problem-Based Learning (PBL) model was chosen as a solution, providing the broadest possible experience for students to think critically, creatively, collaboratively, and communicatively. This research aims to improve learning outcomes of plant and animal cell structures through a problem-based learning model. Data was collected in two SMAN 1 Kerambitan class XI MIPA meetings, totalling 27 people. Cognitive learning outcomes are taken at the end of the meeting, while affective and psychomotor learning outcomes are taken during the learning process. The learning results are then subjected to qualitative analysis to determine learning completeness. The scores obtained by students are compared with the minimum completeness criteria that apply in 70 schools. Cognitive learning results at the first meeting show an average score of 74 for the number of students. Twenty-four people completed it, and three did not, while at the second meeting, the average score was 82, and all students completed it. It can be concluded that implementing the PBL model can improve the learning outcomes of plant and animal cell structures.
The Analysis of Filtration Efficiency to Reduce BOD and COD Levels in Domestic Waste at the Communal WWTP of Bilebante Village, Pringgarata District, Central Lombok Nurhidayah, Nurhidayah; Sholehah, Hijriati; Al-Qarni, Jisul
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.v19i3.6818

Abstract

This research aims to determine the level of reduction in BOD and COD in household wastewater after the filtration process and to determine the efficiency of the filter media in reducing BOD and COD in sewage. The research was conducted in Bilebante village, Central Lombok Regency, NTB. The method takes three wastewater samples at different locations before and after the filtration stage. The results of the research show that the COD concentration in domestic wastewater before going through the processing process using filtration media obtained a result of 63 mgl/L, then at the filtration stage using plastic bottle media, the result was 34 mgl/L with an efficiency value of 46%, and at the filtration stage using activated carbon media, a value of 12 mgl/L was obtained so that the resulting efficiency value was 64%. The results of the BOD concentration in domestic wastewater before going through the processing process using filtration media obtained an initial result of 1.6 mgl/L; then, at the filtration stage using plastic bottle media, the result was 0.6 mgl/L with an efficiency value of 62 %. At the filtration stage using active carbon media, a value of 0 mgl/L was obtained, with an efficiency value of 100%. This research concludes that wastewater is safe to use, whether for watering plants or other things because there is a decrease in levels of COD and BOD that meet quality standards.
Inquiry-Flipped Classroom E-Worksheet to Train Critical Thinking Skills on Chemical Equilibrium Learning Rahmadani, Reza Suci; Lutfi, Achmad
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.v19i4.6827

Abstract

This study aims to obtain a feasible e-worksheet to train students' critical thinking skills. This type of research includes research and development. The development model used refers to the 4-D model but is only limited to the define, design, and develop stages. The pilot test was conducted in one randomly selected class. The feasibility of the developed e-worksheet is guided by validity, practicality, and effectiveness. Validation was conducted by expert validators with scores determined based on mode values. The validation results obtained a score of 5 with a very valid category on the three e-worksheets. Practicality analysis results are seen from the results of the learner response questionnaire and learner activity observations. The percentage of practicality based on the students' response questionnaire was obtained at 98.08% with a very practical category. As for the results of the observation of students' activities, relevant activities were obtained at meeting 1 of  94.23%, meeting 2 of 93.34%, and meeting 3 of 93.78%. Of the three activity percentages, the percentage of relevant activities of students is 93.78% so that it can be said that the e-worksheet developed is very practical. The results of the e-worksheet effectiveness analysis were measured based on the score value of cognitive learning outcomes analyzed using the Wilcoxon test and classical completeness test and the value of critical thinking skills results analyzed using the t test and classical completeness test. The Wilcoxon test results on cognitive learning outcome scores obtained a significance value of 0.000 and a percentage of classical completeness test of 93.75%. The result of critical thinking skills value from t-test obtained a significance value of 0.000 and the percentage of classical completeness test was 96.88%. From both analysis results, the developed e-worksheet can be said to be effective. Based on the results of the analysis of validity, practicality, and effectiveness, it is found that the inquiry-flipped classroom e-worksheet to train critical thinking skills developed is suitable for use.
The Effect of Project Based Learning Model on the Students Questioning Ability Komalasari, Baiq Resti; Setiadi, Dadi; Kusuma, ASHM; Jufri, A. Wahab
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.v19i3.6834

Abstract

The questioning ability is the foundation for building students' thinking skills in finding solutions to problems. This study aimed to determine the effect of the project-based learning model on the ability to ask questions of biology students in class X SMAN 7 Mataram. Quasi-experimental method and Nonrandomized Control Group Design were used in this study with a quantitative approach. The population of this study was class X SMAN 7 Mataram, and random sampling was used as a sampling technique so that four classes were obtained as samples with details of class XG and XF as the experimental group while XK and XL as the control group. The instrument used is Questioning Skills. Data collection of students' questioning skills is done by making five questions, then analyzed by anacova (analysis of covariance) at the 5% significance level using the SPSS 21 program. The results of hypothesis testing in this study show an effect of the project-based learning model on the ability to ask biology students in class X SMAN 7 Mataram.
Development of Green Composite Based on Recycled-Low Density Polyethylene (r-LDPE) as an Environmentally Friendly Packaging Hamdiani, Saprini; Kamali, Siti Raudhatul; Ismillayli, Nurul; Kurniawati, Lely; Sumarlan, Iwan
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.v19i3.6836

Abstract

Low-Density Polyethylene (LDPE) is one of the most popular and commonly used petroleum-derived thermoplastics for packaging. The large production of LDPE has an environmental impact. Reducing production can be done by recycling LDPE (r-LDPE) and adding organic fibres as a filler that is easily decomposed. Cattle farming solid waste as a fibre source was mixed with r-LDPE with coupling agent maleic anhydride (MA). Before use, the cow manure was processed through a bleaching and hemicellulose removal process, which resulted in Cow Manure Fiber (CMF). The CMF was analyzed using FTIR spectroscopy and microscopic fibre dimension analysis. The FTIR results showed peaks at wavenumbers 3538 and 1056 cm-1, representing the -OH, -C-O and -CH functional groups from the cellulose structure. The resulting composites were tested for physical properties, including elastic modulus, yield stress, and elongation. Pure LDPE material was also used for comparison. The best physical properties of the composites were obtained by composites with 95% r-LDPE, 5% CMF, and 2% MA.
Phytochemical Screening of Acetone Extract of Rambai Leaves (Baccaurea motleyana) and Its Bioactivity as an Antibacterial Against Escherichia coli and Staphylococcus aureus Fransiska, Destalia; Roanisca, Occa; Nurhadini, Nurhadini
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.v19i4.6840

Abstract

Bacteria are one of the organisms that may cause disease in the human body. Some bacteria which often infect the human body are Escherichia coli and Staphylococcus aureus. Both bacteria are pathogenic and possibly lead to various diseases such as diarrhea, urinary tract infections, and lung infections that have the potential to result in death. Treatment of infections caused by these bacteria can be done by giving antibiotics as therapy or a quick cure against infection. The use of antibiotics has side effects that result in resistance. Therefore, it is necessary to screen bioactive compounds with bioactivity as better antibacterial agents so that they can be developed into drugs that can cure diseases caused by bacteria. It is urgent to utilize natural antibacterials from plants to treat bacterial infections. This research aims to obtain the compound content, the total phenolic, and antibacterial activity of acetone extract of rambai leaves, so this research focused on rambai leaf acetone extract phytochemical content, total phenolic content, and antibacterial activity examination. Then, Phytochemical testing of rambai leaf acetone extract (Baccaurea motleyana) shows rambai leaves contain alkaloid compounds, tannins, flavonoids, saponins, steroids, and terpenoids that have the potential to be antibacterial. The examination of phenolic content was accomplished by using the Folin-Ciocalteau method. The total phenolic test results obtained were 68.63 mg EAG/g. Antibacterial testing was performed by implementing the disk diffusion method. Antibacterial testing of rambai leaf acetone extract Concentration of 20 %, 40%,60%, and 80%  showed consecutive results in inhibition zones of 3.86 mm, 6.48 mm, 6.55 mm, and 6.63 mm with weak to medium activity for E. coli bacteria. However, S. aureus  bacteria showed consecutive results in inhibition zones of 6.02 mm, 10.15 mm, 17.10 mm, and 19.46 mm with medium to intense activity. There has not been much research on rambai from Bangka Belitung, so there is an indispensable for further research regarding the total flavonoid and total alkaloid content of rambai leaves. Research may also carried out using a variety of solvents.
A Classroom Action Research: How to Improving Students Science Process Skill using Problem-Based Learning Models Azzubairiyah, Nurul; Trimulyono, Guntur; Hikmah, Ziyadatul
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.v19i4.6859

Abstract

The 21st century requires science process skills, yet class 7-B students at UPT SMPN 10 Gresik have not engaged in learning activities that enhance these skills. This is a classroom research study that aims to improve students' science process skills, especially observing, predicting, interpreting, concluding, and communicating, by applying a problem-based learning model. We identified the classroom problem and the plan for the research, collected data by implementing a problem-based learning model, and analyzed and interpreted the data. If the students' science process skills have not reached the expected level, we must reflect and revise the plan. Student worksheets to facilitate problem-based learning in the study. The research sample comprised 32 students in class 7-B UPT SMPN 10 Gresik. We collect data using pretest and posttest science process skills. We analyzed and classified the obtained data using the guidelines for categorizing science process skills. The results showed that the average percentage of students' science process skills in the pre-cycle was 16.0 in the very poor category. In cycle II, the average percentage of science process skills rose to 39.1 in the poor category. Then, in cycle II, the average percentage of students' science process skills was 77.8 in the good category. These findings indicated that the problem-based learning model can improve science process skills. So, science learning activities should use a problem-based learning model so teachers can practice their students’ science process skills.

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