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Saprizal Hadisaputra
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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 22 Documents
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Search results for , issue "Vol. 17 No. 5 (2022): September 2022" : 22 Documents clear
Diversity of grasshopper in Lingsar Vegetable Field, West Lombok Mohammad Liwa Ilhamdi; Agil Al Idrus; Didik Santoso; Ahmad Raksun
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v16i5.2915

Abstract

Vegetables are one of the commodities that support the economic sector. Many factors affect the success rate of vegetable production, including pests. Grasshoppers are herbivorous insects that have the potential as pests that will affect crop yields, especially vegetables. This study aims to determine the diversity of grasshoppers in the vegetable field of Bug-Bug Village, Lingsar District, West Lombok. Sampling was carried out on vegetables with differences in plant age, namely 1, 2, and 3 months using the sweeping net method in the morning (07.00-10.30) around the edge and middle of the vegetable field. It is found that there are eight types of grasshoppers in 2 sub-orders and three families (Acrididae (6 species), Pyrgomorphidae (1 species), Tettigoniidae (1 species)). Atractomorpha crenulata and Oxya japonica were grasshopper species with the highest relative abundances of 42% and 29%, respectively. The analysis showed that the diversity index (H') of grasshoppers found in the research location was 1.5445.
Students problem-solving skills ability on work and energy topics with different science process skills using a problem-based learning model Denda Nadia Miranti; Ahmad Harjono; Satutik Rahayu
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3171

Abstract

This study aims to: (1) determine the effect of the problem-based learning model on students' problem-solving abilities; (2) study the effect of science process skills on students' problem-solving abilities; (3) find the interaction between problem-based learning PBL models and science process skills on students' problem-solving abilities. The type of research is quasi-experimental research with Factorial Design 2 x 2. Population in research of all tenth-grade science students at senior high school SMA Negeri 1 Gunungsari in 2017/2018 academic years. Sampling in this study uses the cluster random sampling technique, in which the X MIA is an experiment class, and the X MIA 1 is a control class. The research instrument used was a description test taking into account the problem's validity, reliability, power difference, and level of difficulty and using observation sheets of science process skills. The data of this study were analyzed by two-way variance analysis with a 2 x 2 factorial design. Based on the result of the study, the average value of the post-test experimental class was 80.29, and the control class was 73.25. The normality and homogeneity tests showed that the two classes were normally distributed and homogeneous at a significant level of 0.05. Then proceed with hypothesis testing using a two-way ANOVA test. The result showed that: (1) FA>Ftable that is 29.35>4.02 means that there is an influence of the PBL model on students' problem-solving abilities; (2) FB>Ftable, namely 29.35 > 4.02 means that there is an influence of science process skills on students' problem-solving abilities; (3) FAB< Ftable, is 3.93<4.02 means that there is no interaction between PBL models and science process skills on students' problem-solving abilities.
Analysis of student mathematical investigations ability on transformation geometry in terms of cognitive style Nina Muthmainnah; Sri Subarinah; Amrullah Amrullah; Arjudin Arjudin
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3391

Abstract

Mathematical investigation is an activity that can encourage an experimental activity, collect data, make observations, identify patterns, make and test conjectures and make generalizations used to improve skills and develop students' mathematical thinking processes optimally. Different cognitive styles can affect students' ability to think and reason, especially in solving mathematical investigative problems. Therefore, this paper will examine mathematical investigations' ability in reflective and impulsive cognitive styles in qualitative descriptive analysis. The subjects in eleventh-grade senior high school at SMA Negeri 2 Mataram, Indonesia. Students were selected using a purposive sampling technique, and six students were selected as subjects in the interview consisting of three reflective students and three impulsive students. The instruments used are mathematical investigation tests, Matching Familiar Figure MFFT tests, and interview guidelines. The results showed that students with a reflective cognitive style were more thorough and systematic in writing down the answers to each point and always thought first in solving problems. Most students went through 4 stages of mathematical investigations: specialization, conjecture, generalization, and justification. While students with impulsive cognitive styles mostly managed to go through 3 stages of mathematical investigations, specialization, conjecture, and generalization, due to a lack of accuracy in solving questions and providing as simple answers as possible according to the question request.
Determination of flavonoid content of ethanol and ethyl acetate extract from purple passion fruit peel Siti Delta Aisyah; Khoirul Ngibad
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3463

Abstract

Purple passion fruit is a fruit that is widely cultivated in Indonesia for syrup and juice making. Purple passion fruit has a high nutritional value, such as antioxidants. Passion fruit contains vitamin A, vitamin C, β-carotene, flavonoid, and fiber components. However, passion fruit peel is a waste that can not be appropriately facilitated, so it becomes a waste that can pollute the environment. In addition, the passion fruit peel contains flavonoids that can be used as antidiabetic drugs. This study aimed to determine the difference in flavonoid levels in the peel extract of purple passion fruit by using ethanol and ethyl acetate solvents. The total flavonoid test using the AlCl3 method is then read on a UV-Vis spectrophotometer. The results showed total flavonoid levels of passion fruit peel extract with ethanol and ethyl acetate solvents of 15.01 mg QE/g samples and 1.27 mg QE/g extract. The highest total flavonoid levels were obtained in ethanol extract of 15.01 mg QE/g extract.
The effect of vermicompost and NPK fertilizer on the growth of Spinach (Amaranthus tricolor) Ahmad Raksun; I Wayan Merta; I Gde Mertha; Mohammad Liwa Ilhamdi
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3464

Abstract

Spinach is a plant usually cultivated for its leaves to be consumed as green vegetables. Spinach contains vitamins, protein, fat, carbohydrates, and minerals. Research on the effect of Vermicompost and NPK fertilizer on the growth of spinach has been carried out from July to September 2021 in Lombok, Indonesia. The objectives of the study are to determine:  (1) the effect of Vermicompost on the growth of spinach, (2) the effect of NPK fertilizer on the growth of spinach, (3) the interaction effect of Vermicompost and NPK fertilizer on the growth of spinach. This research was conducted experimentally using a factorial, completely randomized design with two factors and three replications. The first factor was the dose of NPK fertilizer which consisted of 4 treatment levels, namely 0 g, 0.5 g, 1 g, and 1.5 g for each plant. The second factor is the dose of Vermicompost, which consists of 5 levels, namely 0 kg, 0.6 kg, 1.2 kg, 1.8 kg, and 2.4 kg for 1 m2 of agricultural land. The vermicompost treatment was carried out ten days before planting. The NPK fertilizer treatment was carried out ten and 20 days after planting. Spinach growth parameters were stem diameter, plant height, total leaf, leaf length, and leaf width. The results of the study were: (1) the treatment of NPK fertilizer had a significant effect on the number of leaves, leaf length, leaf width, stem height, and stem diameter of spinach, (2) the application of Vermicompost had a significant effect on the number of leaves, leaf length, leaf width, and stem height but did not significantly affect the diameter of the stems, (3) the optimum dose of NPK fertilizer was 1 gram per plant, (4) treatment 1.8 kg vermicompost resulted in better growth of spinach compared to other.
Analysis of higher-order thinking skills of science students at Madrasyah Tsanawiyah Muslim Nahdatul Ulama during the Covid-19 Pandemic Adinda Dwi Saputri Sugino; Erman Erman
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3607

Abstract

This study aims to describe the higher-order thinking skills of Muslim students of Madrasyah Tsanawiyah Muslim Nahdatul Ulama Sidoarjo Indonesia during the Covid-19 pandemic. The type of research is descriptive analysis with a quantitative approach by analyzing students' higher-order thinking skills on the structure and function of plant tissues, vibrations and waves, and the circulatory system. The subjects of this study were one science teacher and 36 students in the eighth grade. The research instrument consisted of a HOTS test sheet, questionnaire, and interview sheet. The interview sheet consists of 9 questions analyzed with NVIVO 12 software and a test containing five questions on each material, including the HOTS indicator. The data analysis technique used is descriptive statistics. The results showed a decrease in students' HOTS abilities during the pandemic. It is marked by the achievement of average scores and students' abilities in the creative component, which tended to be low in the three materials measured. The decline in students' HOTS abilities before and during the pandemic occurred in the three indicators with the most significant reduction, namely the creating indicator, followed by analysis and evaluation. During the pandemic, the implementation of HOTS-based learning takes place with various forms of adaptation. The difference in implementing HOTS-based learning lies in the frequency of implementing HOTS-based learning for each material and learning model used, and the learning steps. The results of this study can be used as input for science teachers to implement HOTS-based learning during the pandemic.
Optimization time and mass of eggshell adsorbent in improving waste cooking oil quality Sani Widyastuti Pratiwi; Srie Gustiani; Kenanga Triulfa Amadea; Ratna Nurmalasari; Inggis Pinarti
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3654

Abstract

Oxidation and hydrolysis damage to cooking oil can occur due to repeated use of cooking oil. Adsorption by utilizing eggshells, which contain high calcium carbonate and have a natural pore structure that can improve the quality of used cooking oil. This study aims to determine the physical properties and characteristics of the thermally activated chicken eggshell adsorbent and to determine the ability of the adsorbent to absorb acid and metal cadmium. The steps carried out in this study were the manufacture of adsorbents, quality tests of the adsorbents produced, and testing of adsorbents on used cooking oil samples based on acid numbers and decreasing levels of metal cadmium in the samples. The adsorption process of used cooking oil was carried out with variations in the mass of the adsorbent, namely 5, 7, 9, and 11 grams, and stirring time for 10, 20, 40, and 60 minutes. Based on the results of the study, it was found that the optimum conditions for decreasing the acid number with the use of an adsorbent mass of 11 grams and a stirring time of 60 minutes resulted in an acid number was 0.9974 mg NaOH/g with a decrease in the acid number of 76.54%, while for cadmium metal it decreased by 100% with adsorption capacity of 2.57124 mg/g.
Students perception of augmented reality learning media on solar system topics Muhammad Andika Putra; Erman Erman; Enny Susiyawati
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3660

Abstract

The purpose of this study was to describe students' perceptions of augmented reality learning media in solar system topics. The type of research used was descriptive research. The participants involved in this study were 32 students from class 8C of State Junior High School 3 Sidoarjo, Indonesia. The instruments used consist of a student perception questionnaire and an interview. The questionnaire has been validated previously and consists of 5 questions about the concept of planets and the concept of the moon concerning augmented reality learning media. The results showed indicators 1, 4, and 6 obtained the highest score of 97%. It means that students can easily understand these indicators using augmented reality. Indicator 2 got the lowest result of 72%, meaning that students have little difficulty understanding the indicator using augmented reality but are still in the good category. As many as 87% of students rated that augmented reality learning media is very helpful in understanding the material of the solar system. Data from interviews with six students also support this result. They stated that augmented reality is the most effective learning media in studying solar system topics because students considered it more transparent, more interesting, more comfortable to use, and more accessible for students to understand. In conclusion, augmented reality learning media has proven to be effectively used in learning solar system topics. It also can be applied to other abstract science topics that are difficult for students to find in everyday life.
Science teachers innovation in overcoming learning challenges during Pandemic Covid-19: A Reflection Mohammad Hafiz Sulung; Erman Erman
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3678

Abstract

This study aimed to find out the challenges of online learning experienced by schools during the pandemic and explore information from the innovations it has carried out in science learning for students at Muhammadiyah junior high school 7 Cerme, Indonesia. Data collection in this study was carried out using interviews, observations, and documentation to identify challenges and innovations in online learning. The data obtained are challenges and innovations during online learning. These challenges include lack of teacher resources, difficulty monitoring teachers in the implementation of learning, difficulties in monitoring students in learning activities, low IT skills, more time in preparing for learning, lack of student motivation to learn, not having devices, and constrained by internet networks, and students lazy to study. The innovations are improving science and technology in learning and monitoring teacher learning through online journals and learning applications. Next, independent home visits of students, conducting training on the use of IT, using online learning media that are mastered by teachers and understood by students, preparing learning materials properly, and independently providing materials and assignments to students. The results of the reflection show that the implementation of online learning is still carried out even though it has limitations that lead to the emergence of several challenges from both teachers and students. Involvement between teachers and students needs to be maximized by improving teacher skills and student learning habits, which are the demands of the current technological era. So limited face-to-face learning is carried out, which combines face-to-face learning in class with online learning to reduce current challenges.
Increasing science process skills using student worksheet guided inquiry-based learning on a simple plane of materials Afrizal Satya Hadi; Wahono Widodo
Jurnal Pijar Mipa Vol. 17 No. 5 (2022): September 2022
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.v17i5.3689

Abstract

The study aimed to describe the impact of guided inquiry-based student worksheets on improving the scientific process skills in simple machine materials. This research method uses pre-experimental with the design of one group pretest and posttest. The research targeted samples were students in grade eight junior high schools, 40 Surabaya, Indonesia. The data was obtained by experimental methods with an instrument learning plan, student worksheet, learning implementation sheet, pretest and posttest sheet, and student response questionnaire analyzed in quantitative descriptions. The study results showed that the implementation of learning during two meetings got an average of very good and practical criteria. The target skills are the science process involved in formulating problems, identifying variables, hypothesizing, experimenting, analyzing, concluding, and communicating data. An improvement occurs in professional, scientific process skills. The average N-Gain value obtained 0,75 from the pretest and posttest, categorized as high and effective. The students gave an 88.8% response which was categorized as very good. In conclusion, learning by using guided inquiry-based student works can improve science process skills on simple machine materials.

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