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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
 69   70   71   72   73 
Potency of fermented jicama extract cultured with Lactobacillus plantarum B1765 for producing short chain fatty acid Avissa Auryn Wijayanti; Prima Retno Wikandari
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5457

Abstract

Short-chain fatty acid (SCFA) is the end product of inulin metabolism, which has various health benefits, such as affecting lipid metabolism and as an antidiabetic agent. This research studied the effect of the fermentation time of jicama extract with Lactobacillus plantarumB1765 as a starter culture on producing SCFA. Fermentation was conducted for 2, 12, 24, and 36 hours at a temperature of 37°C with 5% (v/v) of the starter culture, then determined the growth of LAB, pH, Total Titratable Acid (TTA), fructose, and Short Chain Fatty Acid content. The total LAB count was measured using the Total Plate Count; fructose was measured using the Nelson-Somogyi method, while SCFA was measured using HPLC with eluents H3PO4 0.1% and acetonitrile 25%. The length of fermentation affected the increase in total Lactic Acid Bacteria (LAB), Total titratable acidity (TTA), fructose, SCFA, and the decrease in pH. The results showed that the optimal growth of Total LAB at 24 hours of fermentation correlated with fructose content, but increasing TTA and SCFA until 36 hours of fermentation and pH decreased to 3,92 at the end of fermentation and decreasing pH due to lactic acid and SCFA producing. SCFA was identified as consisting of acetic acid (1.31±0.006 mg/mL), propionic acid (1.58±0.0055mg/mL), and butyric acid (1.05±0.0038mg/mL), with the highest SCFA was propionic acid. Therefore, fermented jicama extract with Lactobacillus plantarum B1765 has the potential to produce SCFA, which could be used for various health benefits.
Comparison of the accuracy of seasonal data prediction values using SARIMA and winter exponential smoothing on the number of ship passengers in Batam City Widya Reza
Jurnal Pijar Mipa Vol. 18 No. 4 (2023): July 2023
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.v18i4.5469

Abstract

Sea transportation is one of the keys to the success of the tourism industry in a region. One of the problems faced in sea transportation is the increase in the number of passengers that is not balanced with the number of ships available. An accurate prediction model is very important in forecasting the number of passengers of a ship in order to prepare the number of ships according to the number of passengers. This study aims to compare the accuracy of prediction models on the number of ship passengers in Batam City whose data is fluctuating and contains seasonal patterns. In this study, secondary data was used in the form of the number of ship passengers in Batam City from January 2014 to December 2022. The methods used are SARIMA and Winter Exponential Smoothing. The results of this study show that the selected SARIMA model in forecasting the number of passengers in Batam City is SARIMA is SARIMA (0,1,1)(0,1,1)12 with an MSD value of 0.0000021. In contrast, the selected Winter Exponential Smoothing model is Winter Exponential Smoothing at alpha = 0.9, beta = 0.1, and delta = 0.1 with an MSD value of 0.00000. Based on these two models, the most accurate prediction model with the lowest MSD value in forecasting the number of ship passengers in Batam City is the Winter Exponential Smoothing model with values alpha = 0.9, beta = 0.1, and delta = 0.1.
Development of interactive multimedia based on educational games of plant parts and their functions to improve student learning outcomes None Nur Fadila; Karimatus Saidah; Dhian Dwi Nur Wendha
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5472

Abstract

Natural Science (IPA) is an activity to study nature systematically through actual activities and trains students to think critically and objectively to achieve learning objectives. Using learning media in the learning process can support success in the learning process. This study aims to determine interactive multimedia development's validity, practicality, and effectiveness based on the educational game "Plant World" material about plant parts and their functions. This research uses the R&D (Research and Development) method with the ADDIE model, which consists of 5 stages, namely 1) analysis, 2) design, 3) development, 4) implementation, and 5) evaluation. Data collection techniques using expert validation questionnaires, teacher and student responses, and pre-test and post-test evaluations were then analyzed using qualitative and quantitative descriptive. The results showed that the development of interactive multimedia based on the educational game "Plant World" with the validation of media and material experts obtained an average percentage of 86% very valid criteria, teacher responses received a percentage of 89% very practical criteria, and student responses obtained a percentage of 90% very good criteria. The effectiveness was obtained from the average pre-test result of 57.7 and the post-test of 81.7. It was found that the post-test value was higher than the pre-test value, and the specified KKTP was 75. Strengthened by the Paired Sample-test results obtained 0.001 <0.05, there is a significant difference between pre-test and post-test evaluation.
Implementation of the PQ4R learning method to build disposition and enhance student critical thinking skills Wulan Purnamasari; AA Sukarso; Kusmiyati Kusmiyati; I Wayan Merta
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5478

Abstract

This study aims to determine the role of the PQ4R learning method in building critical dispositions and improving students' critical thinking skills on the subject of the human reproductive system. This research was conducted using the technique pretest-posttest control group design. Data were collected with instruments in the form of critical disposition questionnaires and tests of critical thinking skills. The subjects of this study were 69 students divided into two classes, which were taken from the population of course XI IPS SMAN 7 Mataram using the purposive sampling technique—the data analysis using t-test and testN-gain. The research results show an increase in critical dispositions and critical thinking skills in the experimental class compared to the control class, each of which is indicated by the t-test results of 0.000 <0.05. Changes (increases) in students' critical dispositions for the experimental class belonged to the medium category, and the control class belonged to the low category. The improvement of critical thinking skills in the experimental class is in the high category, and in the control class, it is in the low category. This research concludes that the PQ4R learning method can build students' dispositions and critical thinking skills. Recommendations from this study: The PQ4R learning method is suggested by teachers as an alternative effort to improve students' critical thinking skills.
Implementation of the project-based learning model to improve sefl efficacy and student learning outcomes Muhammad Wahyu Setiyadi
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5479

Abstract

This study aimed to determine the application of the project-based learning model to self-efficacy and student learning outcomes in the botany Phanerogamae course. The research method used in this study is the PTK method or Classroom Action Research. The subjects in this study are students of the Biology Education study program STKIP Al Amin Dompu, even in the semester 2022/2023. The instruments used in this study are lumbar instruments of student self-efficacy and instruments of student learning outcomes. The analysis used in this study is qualitative descriptive analysis. The results showed that applying the project-based learning model can improve student learning outcomes and self-efficacy. The self-efficacy of students in the botany Phanerogamae course in the pre-cycle was 49.12%; in the first cycle, it was 78.95%, and in the second cycle, it was 91.23%. Meanwhile, student learning outcomes have also improved. In the pre-cycle, it was 47.37%, cycle I was 78.95%, and cycle II was 89.47%.
Isolation and identification of proteolytic lactic acid bacteria from freshwater pomfret (Colossoma macropomum) intestine Risti Wulaningtyas; Rudiana Agustini
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5481

Abstract

The production of freshwater pomfret (Colossoma macropomum) in Indonesia is abundant, but the digestive tract waste weighing 10-15% of the fish body is not widely utilized. The fish's digestive tract can potentially produce lactic acid bacteria (LAB). Lactic acid bacteria have a proteolytic system that can produce extracellular protease enzymes. Protease enzymes are the most widely utilized enzymes in various industries and have a global revenue of up to $2.1 billion in 2021. Protease enzymes derived from microbes are in great demand due to the efficiency of time, place, cost, and better cultivation techniques than animal and plant sources. This study aimed to isolate and identify proteolytic lactic acid bacteria from the intestines of freshwater pomfret fish and determine their proteolytic index. The methods used were morphological, biochemical, sugar, and proteolytic tests. The BAT-A isolate with the highest proteolytic index of 2.52 with characteristics of Gram-positive, non-spore, facultatively anaerobic, catalase-negative, non-motile, homofermentative, can ferment glucose, maltose, lactose and sucrose which were then identified as proteolytic lactic acid bacteria Enterococcus sp which has the potential as a candidate source of protease enzymes from bacteria isolated from the intestines of freshwater pomfret.
Phytoplankton diversity as a bioindicator for water quality of Tanjung Aan, SEZ Mandalika Central Lombok Tisanianti Tisanianti; Dining Aidil Candri; Lalu Japa
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5487

Abstract

Coastal waters of the Special Economic Zone (SEZ) Mandalika must be given more attention as it is the centre of tourism activities, including the International GP motor circuit on the island of Lombok. One of the bioindicators used in determining water quality is phytoplankton. Phytoplankton is tiny organisms that float on the water, have very weak swimming abilities, and their movements are heavily influenced by water flow. This research aimed to determine the diversity of phytoplankton as a bioindicator in the waters of Tanjung Aan, Central Lombok. Sampling sites in Tanjung Aan were determined by purposive sampling. This research was conducted from March to June 2023. The research results showed that there were six classes, 56 families, and 56 genera with 128 species in the community of phytoplankton. Species 113 were members of the class Bacillariophyceae. The phytoplankton abundance in three sampling sites ranged from 488 ind/L to 1109 ind/L. The species diversity indexes of phytoplankton in the three sampling sites ranged from 2.4 to 2.9, which means that the diversity is in the low category, and the species dominance index ranges from 0.12 to 0.15. This indicates that the condition of the waters of Tanjung Aan is slightly polluted.
Effect of cinnamon (Cinnamomum bermanni) addition on antioxidant activity and organoleptic properties of moringa leaf tea (Moringa oleifera) Nurlaila Syafitri; Veni Rori Setiawati; Jenri Parlinggoman Hutasoit
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5489

Abstract

The study aims to determine the organoleptic characteristics and antioxidant activity of the tea leaves of moringa that are added to moringa using the DPPH method. (1-difenil-2- pikrildihidrazil). This type of study is an experimental study with variations in the addition of moringa of 20 g, 30 g, 40 g, and 50 g on each treatment. Data analysis is carried out using ANOVA variance analysis at the 5% level using the SPSS software application. If there is a real effect, continue with the further Duncan test. The study results show that adding peppermint extract positively affects the tea leaves' organoleptic and antioxidant properties. The most preferred sample by the panelists for texture, color, taste, and aroma is the P4 sample (50 g of moringa + 50 g of cinnamon). Based on the antioxidant activity properties of tea leaves of moringa with the addition of moringa samples whose IC50 value is the highest is the P4 sample (50 g moringa + 50 g moringa) which is 70.55 ppm.
Phytoplankton diversity as a bioindicator for water quality of siwak bay, Specific Economic Zone (SEZ) Mandalika Central Lombok Izma Paryantini; Dining Aidil Candri; Lalu Japa
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5497

Abstract

The Mandalika Specific Economic Zone (SEZ) is a potential tourism industry for the province of West Nusa Tenggara, which has recently received very high attention due to the construction of the international MotoGP circuit. The construction of the MotoGP circuit has become an attraction for domestic and foreign tourists and has increased the number of tourists. The increase in tourism activity has negatively impacted the Mandalika SEZ's coastal waters, such as a decrease in water quality, including the water of Siwak Bay. Water quality monitoring can be done by using phytoplankton as a bioindicator. The study of phytoplankton species diversity as a bioindicator of water quality has never been carried out in the Siwak Bay waters. This research was conducted to analyze the status of Siwak Bay waters based on the phytoplankton diversity index. Samplings were carried out based on a purposive sampling method. This research was conducted for three months, from March to June 2023. The study found seven classes, 59 genera, and 127 phytoplankton species. The abundance of phytoplankton in Siwak Bay was 1025,185 ind/L. The highest abundance was the genus of Trichodesmium. The species diversity index was 3,33. Based on the species diversity index, it can be said that the waters of Siwak Bay are not polluted.
The influence of the group investigation model assisted by media puzzles on students' understanding of science concepts Agustin Khoirun Nisa; Sekar Dwi Ardianti; Nur Fajrie
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
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.v18i5.5515

Abstract

This research is based on students' misconceptions about science subjects, especially animal life cycle materials. This study aimed to find significant differences after applying the puzzle media-assisted group investigation model to students' understanding of science concepts. This research is a quantitative research experiment with a group pretest-posttest design. The sample used was grade V students of SDN 2 Wonosemi, consisting of 12 students. The sampling technique used is random sampling. The data collection method used is the test method. The instruments used are pretest and posttest questions of multiple choice understanding of student concepts consisting of 20 questions. The normality test is an initial test that shows normally distributed data. This study used an average difference test with a statistical test, namely the Paired Sample T-test. The t-test results showed that the average pretest score was 59.17 while the average posttest score was 82.92 with Sig. (2-tailed) = 0.00 < 0.05. According to the criteria used in the Paired Sample T-Test, Ha is accepted, and H0 is rejected. So, a significant difference exists between pretest and posttest scores using a group investigation model assisted by puzzle media on students' understanding of science concepts. Applying the group investigation model assisted by puzzle media affects the understanding of students' science concepts.

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