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All Journal Prosiding Pendidikan Sains Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) JURNAL PENELITIAN SAINTIKA Elkawnie JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Pendidikan Kimia Universitas Riau Lantanida Journal Jurnal Pendidikan Kimia (JPKim) Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Journal of The Indonesian Society of Integrated Chemistry
Ahmad Nasir Pulungan
Universitas Negeri Medan
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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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

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Abstract

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

Abstract

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

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Abstract

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

Abstract

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

Abstract

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.
Co-Authors ., Asmidi ., Nurrnalis Adittiya Prayoga Agung Abadi Kiswandono Agus Haryono Agus Kembaren Ajat Sudrajat Ajeng Asri Audi Akhir Mauludin Pulungan Ambarwati Ambarwati Andriayani Ani Sutiani Ary Anggara Wibowo Ary Anggara Wibowo Aryani, Widya Clara Nur Wandani Dewi Syafriani Dimas Ridho Dwi Siswanta Eddiyanto Eddiyanto Fahmi, Jaman Girsang, Ermi Hafni Indriati Nasution Haqqi Annazili Nasution Harmileni Herlinawati Herlinawati Herlinawtati, Herlinawati Ida Duma Riris Intan Ayu Safitri Irma Syahputri Jamalum Purba Janter Pangaduan Simanjuntak Jasmidi ., Jasmidi Jasmidi Jasmidi Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing Junifa Layla Sihombing, Junifa Layla Juniva Laila Sihombing, Juniva Laila Kurniawan, Ekin Dwi Arif Lastri Anita Silitonga Lisna Efiyanti malis, Nur Manalu, Elisabet Mhd Fahmi midi, Jas Moondra Zubir MS Manurung Muhammad Hadi Muhammad Irvan Hasibuan Mutiara Agustina Nst Nia Veronika Nurfajriani Nurfajriani Nurfajriani, Nurfajriani Nurul Hidayah Nurul Hidayat Aprilita Pernando Sitepu Poppy Lindawati Puji Prayugo Putri Ayunicha Putri Faradilla Rahayu Rahayu Rahayu Rahayu Rahmani, Mei Ramadhan, Dwi Sapri Ratna Sari Dewi Rudi Munzirwan Siregar, Rudi Munzirwan Safitri, Wulan Dwi Saharman Gea Saragih, Gimelliya Sari, Dwy Puspita Shallomita, Grace Sianturi, Irianani Ainung Simanjuntak, Evalina Br Simatupang, Patricia Sipahutar, Rezwan Mulya Sirait, Martina Siregar, Nuraini Sitinjak, Nurhalimah Sri Juari Santosa Sutiani, Ani Syahputra, Ricky Andi Syuhada, Feri Andi Takashi Hayashita Tambunan, Kristine Tiamina Nasution Tiamina Nasution Tita Juwitaningsih Trisunaryantr, Wega Triyono . Wardana, Dian Yasir Arafat Hutapea Yuli Asih Wiliranti Yusnidar, Erika Zuhairiah Nasution, Zuhairiah