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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. 5 (2024): September 2024" : 30 Documents clear
Application of the Search Solve Create Share Learning Model to Metacognitive Awareness and Learning Outcomes Kusmiyati, Kusmiyati; Merta, I Wayan
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.6462

Abstract

This research aims to determine metacognitive awareness and learning outcomes through the search, solve, create and share (SSCS) learning model. This research was conducted on second-semester Biology Education Study Program students who took the Introduction to Education course. Metacognitive awareness data was collected using a modified questionnaire from the Metacognitive Awareness Inventory, then analysed qualitatively with four categories from not yet developed to very well developed. Learning outcome data is collected through tests and then analysed qualitatively, using five categories: very poor to very good. The metacognitive awareness results were dominated by students in the very well-developed category, as many as 48 people (96%), while the learning outcomes were dominated by students in the good category, as many as 24 people (48%). In conclusion, through the SSCS learning model, students can: (1). Manage their cognitive abilities and overcome their shortcomings very well; (2). Building independence, critical thinking, creativity, and self-confidence improves learning outcomes.
Critical Thinking Skills in Assessment Essays to Improve Motivation and Learning Outcomes: Bibliometric Analysis Hirahmah, Atifah; Yani, Intan Purnama; Festiyed, Festiyed; Emiliannur, Emiliannur
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7163

Abstract

As the demands of the modern world increase, critical thinking skills become increasingly important for students to succeed in education and life. Therefore, assessment essays are a tool to assess students' critical thinking skills. This research aims to analyse trends and developments in research on critical thinking skills in assessment essays to increase motivation and learning outcomes. This type of research is bibliometric analysis. Bibliometric methods are used to analyse scientific publications related to this topic. Data were collected from various scientific databases, including Scopus, Web of Science, and Google Scholar. The analysis results show that research on critical thinking skills in assessment essays has continued to increase in recent years. This topic is becoming increasingly important for educational researchers and practitioners. The analysis also indicates that this research comes from various scientific disciplines, such as physics. The main finding of this research is that critical thinking skills in assessment essays can increase student motivation and learning outcomes. This can be achieved by implementing various strategies, such as providing appropriate essay prompts, using clear grading rubrics, and providing constructive feedback to students. This research has several important implications for educational practice. First, this research shows that critical thinking ability is an essential skill for students to develop. Second, this research indicates that assessment essays can improve students' critical thinking skills. Third, this research guides teachers and other educators on effectively implementing essay assessments to increase student motivation and learning outcomes.
Improving Students Learning Outcomes through Implementing Make-a-Match Cooperative Model on Human Respiratory System Topic Nufitasari, Nufitasari; Mardiyyaningsih, Asriah Nurdini; Tenriawaru, Andi Besse
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7421

Abstract

The make-a-match cooperative model is a learning model in which the teacher prepares cards containing questions or problems and prepares answer cards, and then students look for their card pairs. The direct involvement of learners in the learning process will lead to the formation of knowledge and skills that will improve learning outcomes. Implementing the make-a-match learning model is more directed to the game because each learner can search for answers or pairs of question cards obtained more freely and actively. Science learning at MTs Negeri I Kubu Raya still needs to provide a pleasant learning experience. Students' interest in participating in science learning still needs to be higher. It impacts unsatisfactory learning outcomes, as seen from the many student learning outcomes below the Minimum Completion Criteria set by the school. This condition requires science learning that can encourage students to be directly involved and play an active role during learning so that the learning process can run well. The cooperative model of the match type is predicted to increase collaborative learning and student participation in a fun learning situation wrapped in a game situation. This model requires students to find question-answer pairs through interaction with friends in one class. This study aims to measure the improvement of students' learning outcomes in class VIII B MTs Negeri I Kubu Raya on the material of the human respiratory system using the make-a-match cooperative model. The research was conducted over two cycles, and each cycle consisted of two meetings with four stages: planning, action, observation, and reflection. The research subjects totalled 32 people, all of whom were female. Data collection techniques include observation and tests using observation sheet instruments and learning outcomes test questions that have been previously validated. The improvement in learning outcomes focused on this research is the improvement of cognitive learning outcomes. The data was presented as a percentage score of observation of the learning process of the match cooperative model and classical completeness. The results showed that the achievement of implementing the learning process using the make-a-match cooperative model was 100% in both the first and second cycles. The average learning outcome of students on human respiratory system material in the first cycle was 79.68 and increased to 84.84 in the second cycle. Activities carried out by students also increased in each cycle. The increase leads to the activeness or participation of students during learning. Based on the study's results, it can be concluded that learning using the make-a-match cooperative model can improve learning outcomes and students' activeness.
Optimum Condition of Ni2+ Cation Desorption from Adsorbent Sulfonate-modified Silica gel-GPTMS Kauri, Desrike; Oktavia, Budhi; Sari, Trisna Kumala; Khair, Miftahul
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7448

Abstract

Silica gel is a compound that has two active sides, namely silanol (S-OH) and siloxane (Si-O-Si), which are still less effective as adsorbents, so modification is carried out. Silica is modified by adding sulfonate compounds with the help of GPTMS bridging compounds. This modification aims to improve the absorption capacity of Nickel (Ni2+) metal ions in the modified adsorbent, namely sulfonate-modified silica gel-GPTMS. The characterizations used are SSA (Atomic Absorption Spectrophotometry) to see the success of the adsorption and desorption process. This research is quantitative experimental research where the adsorption and desorption processes are carried out using the column method, where the adsorption process itself is carried out on the Ni2+ cation using silica gel-GPTMS Sulfonate adsorbent at an optimal concentration of 20 ppm and pH 3. Then, we continued with the desorption process, which aims to determine the optimum conditions of the desorption process, including determining the type of desorption agent (NaCl and CaCl2) and concentration for the Ni2+ cation desorption process. Based on the results of the research conducted, the optimum condition of the type of desorption agent is CaCl2 where the desorbed weight is 0.1527 mg, and the per cent desorption is 90.10%, the optimum concentration of CaCl2 is 0.025M with a desorbed weight of 0.1442 mg and a per cent desorption of 90.18%. Based on the experimental results, the sulfonate-modified silica gel-GPTMS adsorbent can still be used repeatedly for adsorption and desorption of Ni2+ cations at optimum conditions.
Optimation of Adsorpsi and Desorpsi of Mn2+ Ions on Gel-GPTMS Silica (Glycidoxypropyltrimethoxysilane) Modified with Sulfonates Azizah, Ayu; Oktavia, Budhi; Dewata, Indang; Away, Romy Dwipa Yamesa
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7449

Abstract

Silica gel is an adsorbent often used in chromatography columns as a resin or stationary phase. Silica gel has active groups on its surface in the form of silanol (-SiOH) and siloxane (-Si-O-Si-). The effectiveness of silica gel in absorbing heavy metal ions is very low, so modification is needed to increase the absorption capacity of silica gel to metal ions. The addition of sulfonate with the GPTMS linkage compound dose modification. Adsorption and desorption are two methods that can be used to separate manganese metal. This research aims to obtain the optimum desorption agent (NaCl and CaCl2) and the concentration of the AAS-characterised desorption agent. This study used the column method for the adsorption and desorption process. This study used the column method for the adsorption and desorption process. The column method is a technique used to separate certain substances from a mixture by utilizing the interaction between adsorbent and adsorbate. The results obtained optimum desorption agent CaCl2 where the weight desorbed 0.1168002 mg with a percent desorption of 92.3%, the optimum concentration of CaCl2 0.05 M where the weight desorbed 0.132264 mg with a percent desorption of 95% Adsorbent characterization was conducted with FTIR and XRF.
Optimation of Fe3+ Ion Desorption Using Sulfonate Modified Silica Gel-GPTMS Elvina, Elvina; Oktavia, Budhi; Nasra, Edi; Zainul, Rahadian
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7453

Abstract

Silica gel is one of the adsorbents widely used in adsorption, but silica gel has a low ability to absorb metals. Hence, modifications need to be made to improve it. Silica gel modified using sulfonate groups from monosodium salt compound of 4-amino-5-hydroxy-2,7-naphthalene disulfonic acid using GPTMS coupling compound for adsorption and desorption of Fe3+ ions by column method was carried out. The adsorption process of Fe3+ ions using silica gel-GPTMS-sulfonate has been carried out in previous studies and obtained an optimum state at pH 6 and a concentration of 20 ppm. After the adsorption process is carried out, the desorption process is continued with variations in the type of desorption eluent and concentration variations. The types of desorption agents are NaCl, CaCl2, HCl, and HNO3, with the optimum desorption agent being HNO3 with a release of 0.077517 mg of Fe3+ ions from 0.1587403 mg of Fe3+ ions absorbed and a desorption percentage of 48.83%. The concentration variations are 0.5 M, 1 M, 2.5 M, and 5 M, with an optimum concentration of 2.5 M HNO3 with a release of 0.098505 mg Fe3+ ions and a desorption percentage of 64.43%.
Analysis of Corn Drying Rack Position on Tray Type Dryer on Drying Rate Sutanto, Rudy; Tira, Hendry Sakke
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7027

Abstract

This research aims to determine the drying characteristics of corn kernels using a tray-type dryer, including the moisture content of the corn kernels over time, the mass of the tested corn kernels over time and the drying rate over time. This research uses the experimental method. The drying process uses an incoming drying hot air temperature of 65ºC with an incoming hot drying air speed of 2 m/s, repeated three times until a water content of 14 ± 0.5% is reached. The dryer in this study used four stacking shelves counting from the bottom, which were filled with 500 grams per shelf. This research shows that the further the shelf is positioned from the incoming hot drying air, the lower the drying rate. Vice versa, the closer the drying Shelf is to the incoming hot air, the greater the drying rate. The average decrease in corn kernel mass was 0.95% for shelf 1, 0.93% for shelf 2, 0.90% for shelf 3 and 0.88% for shelf 4 during a drying period of 3.5 hours. The average decrease in water content was 4.4% for shelf 1, 4.29% for shelf 2, 4.15% for shelf 3 and 4% for shelf 4 during a drying period of 3.5 hours. The further the position of the shelf from the hot air dryer, the less air content contained in the material on the shelf can be absorbed by the hot air dryer and vice versa. The average drying rate was 16.8% for shelf 1, 15% for shelf 2, 13.6% for shelf 3 and 12.8% for shelf 4 during a drying period of 3.5 hours at a drying hot air temperature of 65oC with a drying air speed of 2 m/s. The research data analysis results showed that the hot air dryer should not be passed from below but rather from the side. This affects the drying process in the dryer and makes it evener.
Analysis of Bacterial Characteristics Using the Electrical Impedance Spectroscopy Method Dasmasela, Evangelista Militchia Christy; Sugianto, Wahyu; Nur’aidha, Amalia Cemara
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7061

Abstract

Microorganisms have various shapes, structures, and characteristics. This study uses the method of electrical impedance spectroscopy aimed at identifying and comparing the characteristics of Escherichia Coli, Salmonella Typhi, and Staphylococcus Aureus. Measurements from 1 Hz to 100,000 Hz show that Salmonella Typhi has the highest impedance value at low frequencies. In contrast, Escherichia Coli impedance decreases consistently, and Staphylococcus Aureus decreases sharply after 10 Hz. Significant changes are observed in the mid-frequency range of 100 Hz to 1000 Hz, with Salmonella Typhi showing the highest impedance values at 100 Hz compared to Staphylococcus Aureus and Escherichia Coli. At 100 Hz, Salmonella Typhi has the highest impedance value with a mass of 0,06 grams at approximately 39.000 Ohms, 0,08 grams at 35.000 Ohm, and 10 grams at 34.000 Ohm. This is followed by Staphylococcus Aureus, with a mass 0f 0,06 grams having an impedance value of  23.000 Ohms, 0,08 grams having a high impedance value of 31.000 Ohm, and 0,10 grams having an impedance value of 15.000 Ohm. Escherichia Coli, with a mass of 0.06 grams, has an impedance value of  9.000 Ohms, 0,08 grams with an impedance value of  5.000 Ohms, and 0,10 grams has an impedance value of 5.000 Ohms. Electrical Impedance Spectroscopy is effective for identifying and comparing Escherichia coli, Staphylococcus aureu, and Salmonella typhi as the intrinsic characteristics of bacterial cells more influence impedance than bacterial mass.
Development of Performance Assessment Instrument to Measure Students Laboratory Skills in Thermochemistry Practicum Exothermic and Endothermic Reactions Oktavilani, Nabila Defti; Agustini, Rudiana
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7069

Abstract

This development research was conducted to produce a performance assessment instrument that is feasible to use to measure students' laboratory skills in thermochemical practicum activities for exotherm and endotherm reactions based on field investigations and literature reviews that have been completed. The feasibility of performance assessment instruments is reviewed on validity, reliability, and practicality. The type of research used is research and development (Research and Development) with the 4-D method. The validity data was obtained using a validation questionnaire from the validator's assessment. Reliability data was obtained from student laboratory skills scores from two assessors. Affectivity data is obtained from the educator response questionnaire filled out by educators after using the performance assessment instrument. The validity results showed that the aspects of the content component of the performance assessment instrument were declared valid, the presentation feasibility aspect was declared valid, the physical criteria aspect was declared valid, the illustration aspect was declared valid, and the language aspect was declared valid. Reliability results based on the inter-rater reliability analysis obtained a kappa coefficient 0.739 with excellent agreement. Practicality results based on educator responses that received a percentage of 100% with very good criteria. Based on the results of the performance assessment instrument's validity, reliability, and practicality, it is declared feasible to use it to measure the science process skills of students in the laboratory.
Comparative Characteristics of Electrolyte Solutions Using Electrical Impedance Spectroscopy Method Fathia D.S, Adinda Fajar Mila; Sugianto, Wahyu; Setiana, Mira
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7090

Abstract

Electrolyte solutions can conduct electric current and help maintain balance in the human body. This study compares the electrical impedance characteristics of various electrolyte solutions using the Electrical Impedance Spectroscopy (EIS) method. Three types of electrolyte solutions were tested: NaCl solution, Ringer’s Lactate (RL) solution, and Simulated Body Fluid (SBF) solution with concentration variations of 20%, 40%, 60%, 80%, and 100%. Measurements were conducted over a frequency range from 1 Hz to 1 MHz to compare electrolyte solutions using a frequency of 10 kHz with an electric current of 50 μA. At a frequency of 10 kHz, a comparison of the three types of electrolyte solutions with concentration variations from 20% to 100% was made. The measurement result showed that the NaCl solution had an impedance value of 200Ω to 900Ω at high frequencies. The Ringer’s Lactate (RL) solution exhibited impedance variations with impedance values ranging from 800Ω to 300Ω, which is more complex due to the other hand, the Simulated Body Fluid (SBF) solution demonstrated impedance stability at high frequencies with impedance values ranging from 400Ω to 200Ω, indicating its electrical properties suitability with human body conditions. Each electrolyte solution has its characteristics in impedance values at a frequency of 10 kHz, which allows for comparing the three types of electrolyte solutions. For further research, additional studies could include impedance characteristics of electrolyte solutions to broaden understanding of their electrical properties, considering variations in frequency and current conditions to optimise impedance characteristic measurements for various electrolyte solutions.

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