Garuda - Garba Rujukan Digital

Development of Chemistry LKPD Based on TPACK Using the Problem Based Learning (PBL) Model on Hydrocarbon Topics Sirait, Martina; Simatupang, Patricia; Simanjuntak, Evalina Br; Tambunan, Kristine; Manalu, Elisabet; Sianturi, Irianani Ainung; Pulungan, Ahmad Nasir
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 3 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

The purpose of this study to develop TPACK-based LKPD using PBL model to see the extent to which the use of LKPD and practicum can improve student learning outcomes on hydrocarbon materials. The research method used is Research & Development (R & D) with 4D models (define, design, develop and desseminate) with a limited trial. On liveworksheet assisted e-LKPD conducted feasibility validation test and praktiklaitas test by 2 teachers chemistry and 27 learners. The result is an interactive e-LKPD with almost the same characteristics as the printed LKPD, based on everyday phenomena and equipped with video shows. Based on expert validation, the percentage of material aspects, learning, e-LKPD validation, and e-LKPD validation by education practitioners were 97.9%, 100℅, 95% and 81.25%, respectively. The percentage of student response in the field trial was 93.22% with problem solving skills of 86.92%.Keywords: Hydrocarbons, Worksheet Learners, Technological Pedagogical and Content Knowledge, Problem Based Learning Model.DOI: 10.23960/jppk.v13.i3.32146

Mechanical properties of water hyacinth (Eichhornia crassipes) and sansevieria (Sansevieria trifasciata) fiber reinforced composite with polyester matric Nurfajriani Nurfajriani; Ahmad Nasir Pulungan; Ajat Sudrajat; MS Manurung; Rahayu Rahayu
Jurnal Pendidikan Kimia Vol. 16 No. 2 (2024): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i2.56532

Sansevieria (Sansevieria trifasciata) fibers and water hyacinth (Eichhornia Crassipes) fibers as natural fiber producers with good quality have good potential to be developed. This study aims to examine the production and characteristics of composites made from sansevieria fiber and water hyacinth fiber with a polyester matrix through the employment of the hand lay up method. This composite uses variations in the composition of the fiber mixture by soaking 5% NaOH for 2 hours at room temperature, for the resulting composite material. The resulting composite material is then subjected to a bending test to determine its mechanical properties, utilizing the ASTM D638 test standard. Based on the conducted research, the most favorable outcomes in terms of bending test results and modulus of elasticity are observed with a 10% incorporation of sansevieria fiber, yielding an average of 5.520 MPa for bending test and an elastic modulus of 7.444 MPa. Alternatively, when combining both fibers, the optimal mixture consists of 20% sansevieria fiber and 20% eceng gondok fiber, resulting in an average bending test value of 7.503 MPa and a modulus of elasticity of 7.873 MPa.

Preparasi Dan Karakterisasi Poliuretan Dengan Penambahan Logam Aluminium Sebagai Adsorben Asap Rokok Yusnidar, Erika; Syahputra, Ricky Andi; Purba, Jamalum; Sutiani, Ani; Pulungan, Ahmad Nasir
Jurnal Pendidikan Kimia Universitas Riau Vol. 10 No. 2 (2025): Juli: Jurnal Pendidikan Kimia Universitas Riau
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar

Tobacco smoking is known to have adverse health effects, including an increased risk of cancer , cardiovascular diseases, and respiratory disorders. These health risks are largely attributed to the presence of toxic compounds in tobacco smoke, such as polycyclic aromatic hydrocarbons (PAHs) and cyanide, both of which are carcinogenic. One potential method to mitigate these harmful effects is by using adsorbent materials, such as polyurethane foam, as smoke filters. This study aims to: (1) analyze the characteristics of polyurethane foam modified with aluminum metal, (2) evaluate the adsorption capability of the material against carcinogenic compounds in cigarette smoke using GC-MS analysis, and (3) determine the optimal adsorbent composition for maximum foam performance. Material characterization was conducted using FTIR to identify functional groups, swelling degree tests to assess water absorption capacity, SEM-EDX to examine surface morphology and aluminum distribution, and GC-MS to identify the carcinogenic compounds adsorbed. FTIR analysis revealed the presence of N-H, C-H, C=O, and C-C functional groups in the polyurethane structure. The swelling degree test showed a positive result, indicating good water absorption ability. SEM-EDX analysis demonstrated that aluminum particles were successfully distributed within the foam’s pores, resulting in smaller pore sizes. Furthermore, GC-MS results confirmed the adsorption of several carcinogenic compounds, including pyridine, eugenol, and benzenamine. These findings suggest that aluminum-modified polyurethane foam has the potential to serve as an effective filtering material to reduce exposure to toxic compounds in tobacco smoke.

Development of An Interactive E-Module Based on Green Chemistry on Reaction Rate Matter Rahmani, Mei; Pulungan, Ahmad Nasir; Ridho, Dimas; Kurniawan, Ekin Dwi Arif
Journal of The Indonesian Society of Integrated Chemistry Vol. 17 No. 1 (2025): Journal of The Indonesian Society of Integrated Chemistry
Publisher : Pendidikan Kimia FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jisic.v17i1.41109

This study aims to develop an interactive e-module based on green chemistry in the reaction rate material to improve learning outcomes and foster students' interest in learning. The research employed the Research and Development (R&D) method using the 4D development model (Define, Design, Develop, Disseminate), which in this study was limited to the Develop stage. The research subjects consisted of 2 lecturers, 1 chemistry teacher, and 32 students from from the Grade XI Science A-1 class at State Islamic Senior High School 1 Medan (MAN 1 Medan), selected through purposive sampling. The research instruments included test instruments (pretest and posttest questions) and non-test instruments (validation questionnaires and student learning interest questionnaires). Based on expert validation, the interactive e-module was declared highly feasible with an overall average score of 82.00%. In the trial phase, the e-module showed an improvement in student learning outcomes with an N-gain score of 0.69, categorized as moderate, and student interest in learning reached 74%, also falling into the moderate category. Keyword: Interactive e-module, green chemistry, reaction rate, learning outcomes, learning interest.

Electrical Properties of Tropical Fruit Extracts: Effects of EM4 Fermentation and Thermal Processing Safitri, Wulan Dwi; Wardana, Dian; Ramadhan, Dwi Sapri; Fahmi, Jaman; Shallomita, Grace; Putri Ayunicha; Irma Syahputri; Siregar, Nuraini; Ahmad Nasir Pulungan; Moondra Zubir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68720

This study examines the electrical properties of fermented pineapple and lime extracts subjected to Effective Microorganism 4 (EM4) fermentation and thermal treatment at varying temperatures. The fermentation process was conducted over a period of six days, with temperature conditions set at 30°C and 70°C. The results indicate that the lime extract generated higher voltage and current outputs compared to the pineapple extract, particularly on the sixth day of fermentation. Furthermore, the thermal treatment revealed a more pronounced electrical response in lime extract, as evidenced by a greater increase in current at elevated temperatures. These findings suggest that lime extract, when combined with EM4 fermentation and optimal thermal conditions, exhibits greater potential for application in alternative bioelectric energy generation.

Optimization of the upgrading process of bio-oil from palm fronds: The effect of temperature, catalyst mass ratio, and reaction time Sihombing, Junifa Layla; Pulungan, Ahmad Nasir; Simanjuntak, Janter Pangaduan; Hasibuan, Muhammad Irvan; Efiyanti, Lisna; Rahayu, Rahayu; Audi, Ajeng Asri; Hadi, Muhammad
Jurnal Pendidikan Kimia Vol. 16 No. 1 (2024): April
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i1.52556

The lignocellulosic component contained in palm frond waste has potential as an alternative fuel by converting it into bio-oil through a pyrolysis process. However, bio-oil has poor quality when compared to conventional fuels. Therefore, the Hydrodeoxygenation (HDO) process has been widely developed as a promising way to improve the poor physicochemical properties of bio-oil. In this study, a bimetallic CuO-ZnO catalyst loaded on mordenite zeolite was used as a catalyst for HDO bio-oil from palm fronds. Optimization efforts were made on several parameters that affect the reaction including temperature, catalyst mass, and reaction time. This study aims to improve the quality of bio-oil and determine the effect of variations in reaction parameters on the physicochemical properties of upgraded bio-oil. The optimum condition found was the HDO process with a catalyst mass of 3.5 wt% at 325 °C for 120 min. The physicochemical properties of bio-oil after the upgrading process were successfully improved from those of raw bio-oil. The result is a decrease in water content and total acid number, an increase in C and H content accompanied by a reduction in oxygen content with a degree of deoxygenation reaching 72.9%, and an increase in higher heating value (HHV).

Mechanical properties of water hyacinth (Eichhornia crassipes) and sansevieria (Sansevieria trifasciata) fiber reinforced composite with polyester matric Nurfajriani, Nurfajriani; Pulungan, Ahmad Nasir; Sudrajat, Ajat; Manurung, MS; Rahayu, Rahayu
Jurnal Pendidikan Kimia Vol. 16 No. 2 (2024): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i2.56532

Sansevieria (Sansevieria trifasciata) fibers and water hyacinth (Eichhornia Crassipes) fibers as natural fiber producers with good quality have good potential to be developed. This study aims to examine the production and characteristics of composites made from sansevieria fiber and water hyacinth fiber with a polyester matrix through the employment of the hand lay up method. This composite uses variations in the composition of the fiber mixture by soaking 5% NaOH for 2 hours at room temperature, for the resulting composite material. The resulting composite material is then subjected to a bending test to determine its mechanical properties, utilizing the ASTM D638 test standard. Based on the conducted research, the most favorable outcomes in terms of bending test results and modulus of elasticity are observed with a 10% incorporation of sansevieria fiber, yielding an average of 5.520 MPa for bending test and an elastic modulus of 7.444 MPa. Alternatively, when combining both fibers, the optimal mixture consists of 20% sansevieria fiber and 20% eceng gondok fiber, resulting in an average bending test value of 7.503 MPa and a modulus of elasticity of 7.873 MPa.

Application of Teams Games Tournament (TGT) Learning Model assisted by Kahoot Media to Interest and Learning Outcomes of Class XI Students on Reaction Rate Material Sitinjak, Nurhalimah; Pulungan, Ahmad Nasir
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 1 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstrak: Penerapan Model Pembelajaran Teams Games Tournament (TGT) berbantuan Media Kahoot terhadap Minat dan Hasil Belajar Siswa Kelas XI pada Materi Laju Reaksi. Penelitian ini bertujuan untuk mengetahui hasil belajar, minat belajar dan hubungan minat dengan hasil belajar yang dilakukan di SMA Swasta Dharmawangsa Medan. Desain penelitian ini menggunakan desain kelompok kontrol pretest-posttest. Populasi dalam penelitian ini adalah seluruh siswa kelas XI IPA SMA Swasta Dharmawangsa Medan dan sampelnya adalah kelas XI MIA 2 sebagai kelas eksperimen yang diajar dengan model Teams Games Tournament (TGT) berbantuan Kahoot dan kelas XI MIA 3 sebagai kelas kontrol yang diajar. dengan model Teams Games Tournament (TGT) dibantu kartu yang diambil dengan teknik random sampling. Instrumen yang digunakan dalam penelitian ini adalah instrumen tes berupa soal pilihan ganda dan instrumen non tes berupa angket minat belajar. Hasil penelitian menunjukkan bahwa hasil belajar siswa yang diajar dengan model pembelajaran TGT berbantuan kartu pada materi laju reaksi lebih tinggi dibandingkan dengan hasil belajar siswa yang diajar dengan model pembelajaran TGT berbantuan kartu pada materi laju reaksi (75.00 > 70.00). nilai rata-rata minat belajar kelas eksperimen lebih tinggi dibandingkan kelas kontrol (79 > 74,97). Terdapat korelasi positif antara minat dengan hasil belajar dilihat dari rhitung= 0,744 dengan kategori baik. Kata Kunci: Model Pembelajaran Teams Games Tournament, Kahoot, Kartu, Hasil Belajar, Minat BelajarDOI: 10.23960/jppk.v13.i1.2024.05

Application of the Problem Based Learning (PBL) Assisted by Powtoon Video Media on Student Learning Activities and Outcomes on Periodic System of Elements Material Aryani, widya; Pulungan, Ahmad Nasir
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 1 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Application of the Problem Based Learning (PBL) Assited by Powtoon Video Media on Student learning Activities and Outcomes on Periodic System of Elements Material. This research aims to (1) Knowing that the learning outcomes and learning activities of students who are taught with the help of PowerPoint animation video media are higher than the chemistry learning outcomes of students who are taught with the help of PowerPoint media. (2) Knowing that there is a correlation between activities and student learning outcomes.The research population was all class X high school studentsDHARMAWANGSA MEDAN consists of 9 classes, with a purposive sampling method. The results obtained are in (1) The learning results using the right-hand t test obtained tcount > ttable = 3.61 > 1.67, so the learning outcomes of students taught using the PBL model assisted by Powtoon Video Media are higher than the learning outcomes of students taught with the PBL model assisted by Powerpoint Media. (2) Learning activity data shows that the value of tcount > ttable = 1.80 > 1.67, so the learning activities of students taught using the PBL model assisted by Powtoon Video Media are higher than the learning outcomes of students taught using the PBL model assisted by Powerpoint Media in Periodic System of Elements material, (3) the results of the correlation test show that the value of rcount > rtable = 0.73 > 0.36, meaning there is a significant correlation between activities and student learning outcomes taught using the PBL model assisted by Powtoon Video Media in the Periodic System material Element with a coefficient of determination of 54%.Keywords: Problem Based Learning, Powtoon, Learning Outcomes, Learning Activities,Periodic System Of ElementsDOI: 10.23960/jppk.v13.i1.2024.15

Development of Chemistry LKPD Based on TPACK Using the Problem Based Learning (PBL) Model on Hydrocarbon Topics Sirait, Martina; Simatupang, Patricia; Simanjuntak, Evalina Br; Tambunan, Kristine; Manalu, Elisabet; Sianturi, Irianani Ainung; Pulungan, Ahmad Nasir
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 3 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

The purpose of this study to develop TPACK-based LKPD using PBL model to see the extent to which the use of LKPD and practicum can improve student learning outcomes on hydrocarbon materials. The research method used is Research & Development (R & D) with 4D models (define, design, develop and desseminate) with a limited trial. On liveworksheet assisted e-LKPD conducted feasibility validation test and praktiklaitas test by 2 teachers chemistry and 27 learners. The result is an interactive e-LKPD with almost the same characteristics as the printed LKPD, based on everyday phenomena and equipped with video shows. Based on expert validation, the percentage of material aspects, learning, e-LKPD validation, and e-LKPD validation by education practitioners were 97.9%, 100℅, 95% and 81.25%, respectively. The percentage of student response in the field trial was 93.22% with problem solving skills of 86.92%.Keywords: Hydrocarbons, Worksheet Learners, Technological Pedagogical and Content Knowledge, Problem Based Learning Model.DOI: 10.23960/jppk.v13.i3.32146

Title

Found 32 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 32 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 32 Documents
Search