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All Journal JBIO: jurnal biosains (the journal of biosciences) PELANGI PENDIDIKAN Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) JURNAL PENELITIAN SAINTIKA SEMIRATA 2015 JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Pendidikan Kimia Universitas Riau Jurnal Tadris Kimiya J-PEK (JURNAL PEMBELAJARAN KIMIA) Jurnal Pendidikan Kimia (JPKim) JOURNAL OF SCIENCE AND SOCIAL RESEARCH Best Journal (Biology Education, Sains and Technology) INFOKUM Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) JURNAL PENDIDIKAN SAINS SOSIAL DAN AGAMA Indonesian Journal of Chemical Science and Technology Jurnal Pengabdian kepada Masyarakat Britain International for Linguistics, Arts and Education Journal (BIoLAE Journal) Indonesian Science Education Research (ISER) JURNAL TEKNOLOGI INFORMASI & KOMUNIKASI DALAM PENDIDIKAN Jurnal Pendidikan Indonesia (Japendi) Jurna Beta Kimia Chemedu: Jurnal Ilmiah Pendidikan Kimia Jurnal Multidisiplin Indonesia Jurnal Pendidikan IPA Indonesia
Jamalum Purba
Department Of Chemistry Education, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Medan, Jl. Williem Iskandar Pasar V, Medan, 20221
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The Influence of Problem Based Learning and Media to Increase Student Interest and Learning Outcomes Tambunan, Siti Muliana; Purba, Jamalum; Panggabean, Freddy Tua Musa
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 6 No. 1 (2024): APRIL 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i1.57337

Abstract

The aim of this research is to find out whether there is an influence of the use of problem and video based learning models on student interest and learning outcomes. This research was conducted at SMA Negeri 14 Medan and the research population was all class. In the research, the pretest score was 34.85 and the posttest score was 80.28. Normality and homogeneity tests were carried out and the results showed normal distribution. In hypothesis testing using One Sample T-Test, a Sig.(2-Tailed) value of 0.002 was obtained. Therefore, a value of 0.002< α (0.05) means that the hypothesis is accepted, which shows that there is an influence of the use of problem-based learning models and videos on student learning outcomes in chemical bonding material. Meanwhile, for the results of student interest in learning, the average score obtained was 76.06 in the high category. This shows that there is an influence of the use of problem-based learning models and videos on students' learning interest in chemical bonding material.
Development of IBL STEM Model-Based Teaching Materials Using Wordwall to Improve Students' Critical Thinking Skills Freddy Tua Musa Panggabean; Ani Sutiani; Jamalum Purba
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 6 No. 2 (2024): OCTOBER 2024 EDITION
Publisher : Universitas Negeri Medan

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Abstract

This study aims to develop teaching materials based on the IBL STEM model using the Wordwall application to improve students' critical thinking skills. The development model used refers to the ADDIE model with 30 students of the Chemistry Education Study Program, UNIMED as research subjects. The research instrument used an expert validation sheet and a test of students' critical thinking skills on stoichiometry material as many as 25 questions in the form of multiple choices. The results of the study indicate that teaching materials based on the IBL STEM model using the Wordwall application are feasible and effective in improving students' critical thinking skills in Stoichiometry learning. The feasibility is met qualitatively based on the assessment of material expert validators with an average total score of 4.36 (valid) and the assessment of media expert validators with an average total score of 4.32 (valid). Effectiveness is met based on the results of product implementation and evaluation results and is proven by statistical hypothesis testing (p < 0.05) with an average achievement of increasing students' critical thinking skills of 40.067 ± 9.318.
Implementation of STEM-Based PBL with Quizizz and Mentimeter Media on Student Learning Outcomes Meilani Azizah; Purba, Jamalum
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 7 No. 1 (2025): APRIL 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v7i1.67387

Abstract

An effective learning model and appropriate media are essential to optimize students’ understanding and learning outcomes. This study aims to find out if there are differences in student learning results when using the Problem-Based Learning STEM model with Quizizz media compared to Mentimeter media. This study uses a quantitative method with an experimental design and a sample selected through random sampling, consisting of two experimental groups taught using the STEM-based Problem-Based Learning model with different media, namely Quizizz and Mentimeter. The research instrument is a validated multiple-choice learning outcome test, and the data are analyzed using normality and homogeneity tests, as well as hypothesis testing with paired sample t-test andindependent t-test. The paired sample t-test results showed a significant improvement in learning outcomes before and after the treatment in both classes (significance 0.000 ≤ 0.05), while the independent t-test results indicated a significant difference in learning outcomes between the two experimental classes (significance 0.000 ≤ 0.05). The implementation of the STEM-based ProblemBased Learning model with the help of digital learning media (Quizizz and Mentimeter) is effective in improving students' learning outcomes on stoichiometry material; however, Quizizz proved to be superior to Mentimeter in this study.
The STANDARISASI AIR MINUM PADA DEPOT AIR MASAK ISI ULANG DI KELURAHAN DENDANG KAB. LANGKAT Sutiani, Ani; Purba, Jamalum; Wulandari, Dewi; Rahmatsyah, Rahmatsyah; Syahputra, RickyAndi; Agustina, Mutiara
JURNAL PENGABDIAN KEPADA MASYARAKAT Vol. 31 No. 2 (2025): APRIL-JUNI
Publisher : Universitas Negeri Medan

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Abstract

Upaya yang dilakukan adalah memberikan pelatihan bagaimana Standarisasi air minum isi ulang yang sehat dan halal pada depot air isi ulang di Kelurahan Sei Putih Barat Medan Petisah melalui tiga tahapan, yaitu: (1) Pemaparan materi tentang Standarisasi air minum isi ulang yang sehat dan halal pada depot air isi ulang (2) pendampingan sertifikasi halal depot air isi ulang, (3) Review/ Analisis terhadap pelatihan yang telah dilaksanakan serta menarik kesimpulan. Dengan diberikannya pengetahuan dan pemahaman dalam melakukan pelatihan bagaimana Standarisasi air minum isi ulang yang sehat dan halal pada depot air masak isi ulang di kelurahan Dendang Kab Langkat. Kegiatan ini telah dilakukan dengan memberikan penyuluhan dan pendampingan dalam melakukan standarisasi air minum serta sertifikasi halal kepada depot air masak isi ulang. Kegiatan ini juga membantu masyarakat dalam memodifikasi alat filtrasi air sehingga dapat meningkatkan kualitas air isi ulang sehingga dapat meningkatkan pendapatan depot air isi ulang. Luaran yang dihasilkan adalah menghasilkan depot air yang terstandarisasi dan halal serta artikel yang akan diseminarkan pada kegiatan seminar Nasional LPPM Unimed dan artikel di media masa online Waspada.
Pengembangan E-Modul Pembelajaran Berbasis Masalah Terintegrasi Literasi Sains pada Materi Laju Reaksi Hutapea, Delima Damayanti; Purba, Jamalum
ChemEdu Vol 6, No 1 (2025)
Publisher : Jurusan Kimia FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/chemedu.v6i1.71771

Abstract

Penelitian pengembangan e-modul pembelajaran berbasis masalah terintegrasi literasi sains pada materi laju reaksi ini bertujuan untuk: (1) mengetahui kelayakan e-modul pembelajaran berbasis masalah terintegrasi literasi sains pada materi laju reaksi sesuai dengan standar BSNP yaitu kelayakan isi, kelayakan penyajian, kelayakan bahasa dan kelayakan kontekstual; (2) mengetahui praktikalitas e-modul yang telah dikembangkan melalui respon peserta didik. Metode penelitian yang digunakan adalah Research & Development (R&D) dengan model 4D (define, design, develop and desseminate) dibatasi sampai tahap develop. Produk akhir berupa e-modul berbentuk flipbook berbantuan Flip PDF Corporate Edition dilakukan uji validasi kelayakan dan uji praktikalitas oleh 36 peserta didik. Hasil persentase kelayakan materi e-modul pada penelitian ini yaitu, kelayakan isi 95,84%, kelayakan penyajian 95,84%, kelayakan bahasa 95,37% dan kelayakan kontekstual 94,64%. Pada kelayakan media e-modul pada penelitian ini yaitu kelayakan kegrafikan 96,91% dan kelayakan penyajian 96,67%. Hasil uji praktikalitas melalui respon peserta didik mendapatkan hasil sebesar 82,15%.
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.
PENGELOLAAN PRODUK OLAHAN SAMPAH MENGGUNAKAN MESIN PENCACAH LIMBAH PLASTIK PADA KADER PKK MEKAR 15 MEDAN Ani Sutiani; Jamalum Purba; Dewi Wulandari; Rahmatsyah, Rahmatsyah; Sanimah, Sanimah
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 5 No. 4: September 2025
Publisher : Bajang Institute

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Abstract

Kegiatan Pengabdian Masyarakat oleh tim dosen pengabdian masyarakat FMIPA Universitas Negeri Medan ini bertujuan untuk meningkatkan pengetahuan dan keterampilan kader PKK Mekar 15 Medan dalam pengelolaan limbah plastik rumah tangga melalui penerapan teknologi tepat guna mesin pencacah plastik. Adapun masalah yang dihadapi mitra adalah semakin tingginya volume limbah plastik di lingkungan tempat tinggal dan minimnya pengetahuan dan keterampilan masyarakat dalam pengelolaan limbah plastik . Kegiatan pengabdian Masyarakat dilakukan melalui pelatihan teknis, demonstrasi penggunaan mesin, dan pendampingan langsung. Berdasarkan hasil evaluasi pelaksanaan terdapat peningkatan pengetahuan peserta tentang limbah plastik, prosedur penggunaan mesin pencacah plastik dan cara pengelolaan limbah plastik secara mandiri. Hasil penilaian peserta terhadap keterlaksanaan kegiatan pengabdian Masyarakat menunjukkan tingkat kepuasan yang tinggi dalam aspek penyampaian materi, keterampilan pendampingan penggunaan mesin pencacah dan keterterapan materi terhadap kebutuhan Masyarakat. Kegiatan ini memberikan dampak positif bagi kader PKK Mekar 15 Medan untuk mengembangkan pengelolaan limbah plastic secara mandiri.
Kinetics Study Addition Reaction for Methyleugenol with Formic Acid to Produce The Methyleugenol Formic Ester as Intermediate Compound of Hypertension Drug Fadhilah, Nabila Nur; Nugraha, Asep Wahyu; Purba, Jamalum; Dibyanti, Ratu Evina
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.v8i2.68778

Abstract

The methyl eugenol formic ester is the intermediate formation of the 1-(3,4-dimethoxy phenyl)-2-amino-2-cyano propane compound, a hypertension drug. This study aimed to find the value of the reaction order and study the mechanism of an addition reaction of methyl eugenol with formic acid to produce the methyl eugenol formic ester. Gas chromatography analysis of the residual methyl eugenol determines the reaction order. There are two dominant products in the synthesis of methyl eugenol formic ester, resulting in the formation reaction of methyl eugenol formic predictable in a two-way reaction mechanism. The determination of the energy of the reactants, products, and transition compounds in the formation reaction of methyl eugenol formic ester compound prescribed through computational studies using NWChem 6.0 and visualization using Jmol. The results of the analysis of the data obtained several conclusions: The value of the reaction ordered for methyl eugenol with formic acid is the first order. Based on the computational result shows that the enthalpy change for the reaction product is ΔH(1) = -47,810 KJ/mol and ΔH(2) = -60,545 KJ/mol. The activation energy for both transition compounds is Ea(1) = 163,1937 KJ/mol and Ea(2) = 370,3477 KJ/mol. This fact indicates that the formation of methyl eugenol formic ester compound using the method (1) was more likely than (2). The prediction is based on the determination of Ea with the computational chemistry following the experimental result, which shows the product of (1) more than the product of (2).
Development of General Chemistry Teaching Materials Using the PjBL-STEM Model to Enhance Students' Creative Thinking Skills Purba, Jamalum; Panggabean, Freddy Tua Musa; Sutiani, Ani
Jurnal Tadris Kimiya Vol 9 No 2 (2024)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v9i2.39318

Abstract

Thinking creatively is a crucial higher-order skill that students must acquire when they graduate from university. This necessitates lecturers designing and developing learning processes that actively engage students while fostering their creative thinking abilities. This study aims to develop and validate general chemistry teaching materials on organic compounds and reactions using the PjBL-STEM model and evaluate their effectiveness in improving students' creative thinking skills. The study employed the Analysis, Design, Development, Implementation, and Evaluation (ADDIE) model. The teaching materials were designed as comprehensive books that adhered to the PjBL-STEM framework. Effectiveness was measured by analyzing improvements in students’ creative thinking abilities through quantitative testing. The results demonstrate that the PjBL-STEM-based teaching materials are valid and feasible for implementation. Their effectiveness in enhancing students' creative thinking abilities was statistically significant (t-count = 32.488; p = 0.000), with an average improvement of 42.725 ± 8.317. The development of PjBL-STEM-based teaching materials offers a valuable tool for chemistry education, effectively promoting creative thinking skills among students. This approach provides a practical framework for lecturers to design innovative, student-centered learning strategies.
Analysis Student Motivation and Learning Outcomes by Apllying Problem Based Learning and Discovery Learning Models Panggabean, Freddy Tua Musa; Silitonga, Pasar Maulim; Purba, Jamalum; Jasmidi, Jasmidi; Purba, Rica Ariani
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol. 5 No. 1 (2023): APRIL 2023 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v5i1.42419

Abstract

Problem Based Learning and Discovery Learning are models that can increase motivation and learning outcomes of Macromedia Flash-based students on chemical equilibrium materials. The instruments used in this study are test instruments with a cognitive level of C3-C5 and non-test instruments of learning motivation questionnaires. This study aims to: 1) To determine the differences in learning outcomes with the PBL and DL models; and 2) To find a linear and significant relationship between motivatIon and student learning outcomes. The sample was 64 students of class XI MIPA 1 and MIPA 2 who were taken using random sampling techniques. Data analysis using a two-party t-test and a correlation test. The results: 1) There were differences in chemistry learning outcomes of students who were using the PBL and DL models. Where student learning outcomes obtained PBL model (18,219±2,268) and student learning outcomes using the DL model (16,438±2,327) with tvalue (3,101) > ttable (2.00) and a sig value (0.003)< sig(0.05). 2) There is a linear and significant correlation between motivation and student learning outcomes where in the PBL model obtained r count (0.773) > r table (0.349) and dl model obtained rcount (0.770) > r table (0.349) with sig(0.000) value < sig (0.05).
Co-Authors Abdul Hamid K Agustina, Mutiara Ahmad Nasir Pulungan Angelina Barus, Maria Ani Sutiani Ani Sutiani Aristo Hardinata Asep Wahyu Nugraha Astri Devi Br Pakpahan Azizah, Meilani Bilham Aditia Sembiring Budi Ali Mukmin Bunga Dewi Cindy Agnesia Cintiya, Henni Dedi P Simatupang Dewi Wulandari Dewi Wulandari Eidi Sihombing Ely Djulia Fadhilah, Nabila Nur Feronica Agustina Ginting Fonica, Arini Freddy Tua Musa Panggabean Ginting, Priskilla Gultom, Risdo Halim Simatupang Hery Widijanto Hutahaean, Harvei Desmon Hutapea, Delima Damayanti Intan Juwita, Intan Jasmidi Jasmidi Jasmidi Jasmidi Juan Samuel Simanjuntak Krisbiantoro, Philip Anggo Lamria, Melinda Lena Lisnawaty Simatupang M Nizam Manalu, Santa Maria manihar Situmorang, manihar Maria Angelina Barus Marudut Sinaga Meilani Azizah Menti Irawati Purba Mery Adelin Panggabean Muhammad Haris Effendi Hasibuan Muhammad Isnaini Muhammad Isnaini Nora Susanti Nora Susanti Nora Susanti Novelyani Siregar Oktaria, Feri Bidiana Pasar Maulim Silitonga Pasar Maulim Silitonga Priskilla Ginting Purba, Menti Irawati Purba, Rica Ariani Purba, Rohni Duani Rahmatsyah Rahmatsyah, Rahmatsyah Ratu Evina Dibyantini Rica Ariani Purba Risdo Gultom Riska Fitria, Riska Rolian Ade Fitri Sabani Sabani Sanimah Sembiring, Bilham Aditia Siahaan, Ella Oktavianna Sibuea, Gorat Viktor Simamora, Putri Elsa Simangunsong, Garvin Simangunsong, Garvin Brilly Anugerah Simanjutak, Mariati Purnama Simanullang, Tasya Putri Haren Sinaga, Bunga Apriani Sinulingga, Kiki A. Putri Br. Sipahutar, Putri Desiana Siti Muliana Tambunan Siti Rohana Siregar Sutiani, Ani Syahputra, Ricky Andi Syahputra, RickyAndi Tambunan, Salsabila Tambunan, Siti Muliana Tarigan, Miska Likasina Tiur Malsari Siregar Yosia Gopas Oetama Manik Yusnidar, Erika Zainuddin Muchtar Zuhairiah Nasution, Zuhairiah