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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 30 Documents
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Search results for , issue "Vol. 19 No. 4 (2024): July 2024" : 30 Documents clear
Macroinvertebrates as a Bioindicator of Water Quality in the Jangkok River, Lombok Island Nurhairani, Nurhairani; Candri, Dining Aidil; Zamroni, Yuliadi
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.v19i4.6052

Abstract

Rivers are water bodies in open ecosystems where activities in the environment have an impact on river water quality. Monitoring of water quality is necessary to preserve aquatic resources. One of the river basins on Lombok Island is the Jangkok River. This river has a high utility, so water quality monitoring is needed. Macroinvertebrates are one of the best biological indicators for water quality monitoring. The objective of this study is to determine the diversity of macroinvertebrates and the quality of Jangkok River waters by using macroinvertebrates as bioindicators so that the results of this study can be used as a reference basis for the future use of Jangkok River water in the allocation of community needs. The method used in this research is biomonitoring with macroinvertebrate bioindicators, and the technique used in sampling is purposive sampling. Sampling was conducted at three stations, namely the upstream, middle, and downstream parts of the Jangkok River. The data analysis used was the Family Biotic Index (FBI) supported by physical-chemical parameters. The results of this study showed that the macroinvertebrates identified were 721 individuals consisting of 5 classes, 17 orders, and 36 families. The water quality of the Jangkok River, based on the FBI value in the upstream and middle sections, is still included in the good category, while in the downstream section, it falls into the very bad category.
The Influence of Guided Inquiry Learning Models on Students Creative Thinking Abilities on Reaction Rate Material Hutami, Sulia; Burhanuddin, Burhanuddin; Ariani, Sunniarti; Al Idrus, Syarifah Wahidah
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.v19i1.6393

Abstract

This research examines the effect of the guided inquiry learning model on students' creative thinking abilities, focusing on studying chemical reaction rate material in Class XI Science at SMAN 4 Praya. This research adopts a quantitative research design with a quasi-experimental research type. The population in this study were all class XI MIPA students at SMAN 4 Praya, consisting of 237 people spread across 7 classes. The sampling technique uses non-probability sampling, seeing a similarity in students' average daily test scores with students in classes XI IPA 3 as the control class and XI IPA 6 as the experimental class. The experimental group was given a guided inquiry learning model, while the control group used conventional teaching methods. This research assesses creative thinking abilities through a description test including three indicators: originality, fluency, and flexibility. In this research, the data analysis technique uses a series of statistical tests, including the Kolmogorov-Smirnov normality and homogeneity tests. Hypothesis testing uses the independent sample t-test. The hypothesis test showed that the t-test results prove that tcount ≥ ttable , namely 4.31 ≥ 2.03, and a significant value of 0.00 ˃ 0.05, then H0 is rejected, and H1 is accepted. Thus, it can be concluded that the guided inquiry learning model positively affects students' creative thinking abilities in the reaction rate material for class XI Science at SMAN 4 Praya. This can also be seen from the results that the average value of the experimental group is higher than the control group's, with the experimental class's average value being 79.03% and the average value of the control class being 62.42%.
Nutrient Content of Corn Straw (Crude Fibre, Crude Fat and TDN) Caused by Different Doses of Urea Noersidiq, Azhary; Yanuarianto, Oscar; Fahrullah, Fahrullah; Maslami, Vebera; Hasma, Hasma
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.v19i4.6643

Abstract

This research aims to evaluate ammoniated corn straw's nutritional content and determine the best urea dose. Corn straw is one of the alternative feed sources from waste in the livestock industry. They contain crude 6.38%protein, 30.19%crude fibre, 2.81%crude fat, 51.69% EMWN, 8.94%ash, 53.12%TDN, 22.5% hemicellulose, 10.6% lignin, and 32.9% cellulose. However, the nutritional quality of corn straw can be affected by various factors, such as the high lignin content. It can bind to cellulose and hemicellulose, reducing digestibility and utilization as animal feed, so it needs to be processed first, one of which is ammoniation technology using urea. This research used 500 grams of corn straw and urea for the ammoniation process based on dry matter (DM) of corn straw for urea doses. The research designed by a complete randomized design (CRD) consisting of 4 treatments and 4 replications, namely T1= only corn straw (control), T2= corn straw with 2% urea, T3= corn straw with 4% urea and T4= corn straw with 6% urea. The variables measured were crude fiber, crude fat,, and TDN. The results showed that urea used in the ammoniation process of corn straw showed a significant effect (P<0.05) on increasing the content of crude fiber, crude fat,, and TDN. Urea can stretch the bonds between ligncellulose, It was concluded that the best urea dose is at 6%, with 25.91% crude fibre, 2.65% crude fat, and 60.91% TDN respectively.
Lactic Acid Bacteria Isolated from Cangkuak Riau: Characterization of Antibacterial Activity Maslami, Vebera; Noersidiq, Azhary; Fahrullah, Fahrullah; Dani Putra, Endo Pebri; Nugraha, Aditya Wahyu; Utami, Wirawati Chandra; Mahendra, Khoiri
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.v19i4.6730

Abstract

This paper reports on the Cangkuak from the fermentation of meat and bones using bamboo shoots, added rice and salt stored in a container (anaerobic conditions). The cangkuak was obtained from the Riau (Indonesia). The cangkuak may contain lactic acid bacteria (LAB), which are essential in the fermentation process. Most LAB is gram-positive bacteria with some health benefits, such as antibacterial. This study investigated the isolate and characterized LAB from cangkuak by an antibacterial activity test. The bacteria used Bacillus Cereus, S. Aureus, E. Colli, and Salmonella sp. Bacterial isolates were grown on MRS agar media, to which 0,5% CaCO3 was added and then purified using the streak method. The results obtained were pure isolates. The results of the cangkuak isolation showed 8 LAB isolates. The eight isolates were characterized by standard Bergey's manual of systemic bacteriology (genus Lactobacillus sp). Furthermore, an antibacterial test revealed differences in ineffectiveness against the inhibition zone. Cangkuak (CK) 3.1 isolate was most effective in inhibiting bacterial growth. The size of the inhibition zone for Aureus, E. Colli, and Salmonella sp. were 10.82 mm, 12.65 mm, and 12.29 mm, respectively. This result could indicate the presence of LAB isolates from fermented foods that have the potential to be antibacterial.
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.
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.
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.
The Effectiveness of Differentiated Learning using the TaRL (Teaching at the Right Level) Approach for Improving Learning Interest and Learning Outcome Afandi, Rahmad Alvian; Ningtyas, Nindita Sabila; Susiyawati, Enny; Pratiwi, Purwanita
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.v19i4.6860

Abstract

This research was motivated by the low interest in learning and the low learning outcomes of students. This is because the learning that is carried out does not follow the students' wishes and ability level, so students are less active and have a low interest in learning science. Learning interests will affect the learning outcomes of students. This class action research aims to improve learning outcomes and students' interest in learning by using differentiated learning using the TaRL approach with the help of the inquiry learning model. TaRL learning is learning by grouping students according to their ability level. This study was conducted at SMPN 49 Surabaya in class 8B. The research data collection method used a questionnaire about students' interest in learning, an observation sheet for the implementation of learning, and a written test to determine students' learning outcomes. The design used in this study was the Tagart and Kemmis cycle model, and the data obtained was analyzed using classical learning completeness. The results showed that differentiated learning using the TaRL approach improved student learning outcomes with a percentage increase of 37% and an increase in the average score of 17.10. In addition, the results showed that students' interest in learning experienced a rise in categories from the initial condition, which had a poor category, to a good category at the end of the cycle. Based on the study's results, it can be concluded that applying differentiated learning using the TaRL approach can improve learning outcomes and student interest in the learning cycle.
Liver Histology of Male Rat (Rattus norvegicus) Feed L-Carnitine Supplement Padmiswari, Anak Agung Istri Mas; Indrayoni, Putu; Wulansari, Nadya Treesna
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.v19i4.6900

Abstract

Obesity is a condition where the body is overweight due to fat accumulation, each exceeding 20-25% of body weight for men and women. L-carnitine is a nutrient that plays a role in transporting fat to the mitochondria to be burned and converted into energy for the body. Sufficient L-carnitine allows the body to burn fat at optimal levels. This research aims to determine the side effects of fed L-carnitine supplements against liver histology. This study used a completely randomized design (CRD) with four groups comprising six albino rats. The treatments were fed orally by distilled water 1 ml/day (Control), P1 fed by L-carnitine supplement dose 100 mg/kg body weight orally 1ml/day, P2 fed by L-carnitine supplement dose 150 mg/kg body weight orally 1ml/day, P3 fed by L-carnitine supplement dose 200 mg/kg body weight orally 1ml/day. Treatments were given to albino rats every day for 90 days. Variables observed measured were lipid degeneration, central vein dilation, and pyknotic nuclei. Data were analyzed with the statistical program (SPSS 22.0 for Windows) with One Way ANOVA. The results showed that feeding L-carnitine supplements in high doses for long periods can damage the liver cells of male rats. The microscopic liver damage statistical analysis showed significant differences (P<0.05) between the control and treatment groups.

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