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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) JOURNAL OF SCIENCE AND SOCIAL RESEARCH ALKIMIA : Jurnal Ilmu Kimia dan Terapan 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 Science and Science Education (JoSSEd) Journal of The Indonesian Society of Integrated Chemistry
Ahmad Nasir Pulungan
Universitas Negeri Medan
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Neuroscience Physics Social Sciences Other

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PENGARUH PERBEDAAN METODE MELT PROCESSING DAN SISTEM LARUT TERHADAP HASIL GRAFT KOPOLIMERISASI CYCLIC NATURAL RUBBER (CNR) DENGAN GLYCIDYL METHACRYLATE (GMA) Eddiyanto, Eddiyanto; Sipahutar, Rezwan Mulya; Nurfajriani, Nurfajriani; Pulungan, Ahmad Nasir; Herlinawtati, Herlinawati
Lantanida Journal Vol 12 No 2 (2024)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v12i2.26272

Abstract

Although natural rubber has many good qualities, its commercial uses are limited by its low chemical reactivity and low heat stability. A derivative with better stability, Cyclic Natural Rubber (CNR), has to be chemically modified to increase its usefulness and broaden its range of applications. Investigating the effects of two different methods, the melt processing and solution system on the FTIR spectra of Cyclic Natural Rubber (CNR) graft copolymerization with Glycidyl Methacrylate (GMA) was the aim of this work. Additionally, an evaluation of the effect of Dicumyl Peroxide (DCP) and Benzoyl Peroxide (BPO) initiators on grafting results was carried out. According to FTIR spectrum analysis, the carbonyl ester (C=O) peak at roughly 1721 cm⁻¹, indicating effective grafting, was more pronounced in the melt processing approach than in the solution procedure. This implied that melt processing resulted in higher grafting efficiency. The absorption bands in the C-H stretching region (2860-2921 cm⁻¹) and the C=C stretching area (1672 cm⁻¹) show that the underlying structure of CNR has not degraded. The carbonyl index values for each composition showed that BPO performed better than DCP in the melt treatment method, however DCP as an initiator in the solution system produced a higher grafting efficiency than BPO.
Analysis and Characterization of Interactions Between Components in Claymask Formulations Khairatun Annisa; Ahmad Nasir Pulungan; Junifa Layla Sihombing
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 1 (2025): JANUARY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i1.68671

Abstract

The basic properties that need to be considered and maintained in the use of an ingredient in cosmetic and pharmaceutical formulations are: colloidal size, plasticity of crystal structure, mineralographic composition, high cation exchange capacity, development capacity, high specific surface area, and consequently strong adsorption and absorption capacity. Clay masks can contain active ingredients in the form of antibacterial with alternative natural ingredients such as babadotan leaf extract. The analysis of the functional cluster in the study was obtained using the Fourier Transform Infrared (FT-IR) method,Evaluation of clay mask preparations includes testing of physical and chemical properties. Testing of physicochemical properties consists of organoleptics, pH, homogeneity, dispersibility, adhesion and antibacterial test against bacteria p. Acnes. The stability of the preparation will be damaged if the mixing system is disturbed, mainly due to temperature changes and changes in composition due to excessive addition of one of the phases or if the emulsifying substances are not mixed with each other. The extraction results obtained from babadotan the yield produced is 17.63%. The FTIR spectrum obtained for the clay mask formulation shows the presence of new peaks at wave numbers 3310, 2120, 1430 and 2126 cm-1 where these peaks appear due to the additional ingredients used in the cosmetic formulation.The interaction between the components of the clay mask depends on the type of clay being applied. Interactions can be seen in FTIR with additional spectral peaks caused by other additives such as glycerin, In which the interaction shows the OH group involved in water absorption. This is because the results of all evaluations, Formula I tends to be stable close to the requirements of the clay mask preparation.
Implementation of Problem Based Learning Model Assisted by Electronic Student Worksheets to Improve Learning Outcomes and Learning Motivation on Reaction Rate Material Manurung, Elisa; Pulungan, Ahmad Nasir; Sudrajat, Ajat; Amdayani, Susilawati; Roza, Destria
Journal of Science and Science Education Vol. 6 No. 2 (2025): October
Publisher : Pascasarjana, Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jossed.v6i2.12064

Abstract

Learning media serves to assist teachers in conveying information to students and can increase student learning motivation. This study aims to determine the application of the Problem Based Learning learning model assisted by E-LKPD to improve learning outcomes, learning motivation and the relationship between learning motivation and learning outcomes on the reaction rate material at Kartika 1-2 Medan Private High School. The type of research used is Quasy Experiment using pretest posttest. Sampling was done by purposive sampling. The sample consisted of one class, namely class XI IPA 4 as the experimental class (n = 30). Learning outcome data were processed using the Normalized Gain (N-Gain) test. The hypothesis was tested by linear regression and correlation test. The effectiveness of the Problem Based Learning learning model to improve learning outcomes and learning motivation on the reaction rate material is seen from the average posttest and pretest scores of 33.5 and 89.83, then the average N-gain value of 0.84 is included in the high category. The average value of students' initial and final learning motivation measured using a learning motivation questionnaire is 93.62, which is in the high category. These results indicate an increase in student learning outcomes after learning using the Problem Based Learning model assisted by E-LKPD. Hypothesis testing produces a value of rhit= 0.71 and rtabel = 0.36 at the significance level (  = 0.05) which shows that rhit > rtabel so it can be concluded that there is a significant relationship between learning outcomes and student learning motivation.
SKRINING FITOKIMIA DARI DAUN LIDAH MERTUA (SANSEVIERIA TRIVASCIATA) Siahaan, Ella Oktavianna; Syahputra, Ricky Andi; Sutiani, Ani; Purba, Jamalum; Pulungan, Ahmad Nasir; Nasution, Zuhairiah
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol 8, No 3 (2025): August 2025
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v8i3.4092

Abstract

Abstract: Sansevieria Trivasciata (snake tongue) is a traditional medicinal plant known to contain various bioactive compounds. This study aims to identify secondary metabolite content and characterize Sansevieria leaf crude extract. Plant samples were obtained from Aekbolon village, North Sumatra, and have undergone a taxonomic identification process. The crude extract was prepared by drying and grinding the leaves. The characterization results showed a water content of 8.5% and a water-soluble extract content of 23.85%, which is in accordance with the quality standards of crude extracts according to the Indonesian Herbal Pharmacopoeia. Extraction was carried out using a maceration method using 96% ethanol for three consecutive days. The resulting thick extract was then tested qualitatively to detect secondary metabolites. The screening results showed the presence of allkaloids, flavonoids, saponins, and steroids, while tannins were not detected. These findings indicate that Sansevieria has potential as a source of natural active ingredients for the development of herbal medicines. Keywords: Sansevieria Trivasciata, Phytochemical Screening, Secondary Metabolites Abstrak: Sansevieria Trivasciata (lidah mertua) merupakan tanaman obat tradisional yang diketahui mengandung berbagai senyawa bioaktif. Penelitian ini bertujuan untuk mengidentifikasi kandungan metabolit sekunder serta melakukan karakterisasi simplisia daun Sansevieria. Sampel tanaman diperoleh dari desa Aekbolon, Sumatera Utara, dan telah melalui proses identifikasi taksonomi. Simplisia disiapkan melalui proses pengeringan dan penghalusan daun. Hasil karakterisasi menunjukkan kadar air sebesar 8,5% dan kadar sari larut dalam air sebesar 23,85%, yang sesuai dengan standar kualitas simplisia menurut Farmakope Herbal Indonesia. Ekstraksi dilakukan dengan metode maserasi menggunakan etanol 96% selama tiga hari berturut-turut. Ekstrak kental yang diperoleh kemudian diuji secara kualitatif untuk mendeteksi metabolit sekunder. Hasil skrining menunjukkan adanya senyawa allkaloid, flavanoid, saponin, dan steroid, sedangkan tanin tidak terdeteksi. Temuan ini menunjukkan bahwa Sansevieria memiliki potensi sebagai sumber bahan aktif alami untuk pengembangan obat herbal. Kata kunci: Sansevieria Trivasciata, Skrining Fitokimia, Metabolit Sekunder
Analysis Relationship between Free Fatty Acid and Peroxide Values in Crude Palm Oil Industry Ramlan Silaban; Marta Adeliana Sijabat; Afrilita Harahap; Timotius Agung Soripada; Marham Sitorus; Eddiyanto; Ahmad Nasir Pulungan
ALKIMIA Vol 10 No 1 (2026): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/x133fg91

Abstract

Crude Palm Oil (CPO) is crude palm oil extracted from the palm oil industry that has not undergone a refining process. CPO quality is considered good if it meets applicable quality standards. This study aims to determine a mathematical equation model that describes the relationship between free fatty acid value (FFA) quality parameters and peroxide value (PV) in CPO samples. FFA content analysis was carried out using the alkalimetric titration method, while the peroxide value was tested using the iodometric titration method. The storage time variations used were 0 - 3 weeks. The results showed that : (1). The sample consist Free Fatty Acid value (FFAV)  were 2.97%; 3.22%; 3.41%; and 3.66%, respectively, with an average of 3.31%. Meanwhile, Peroxyde Value (PV)  ​​were obtained at 1.85; 2.25; 2.65; and 3.04 meq O₂/kg. (2). According to these results, the FFAV content still meets the Indonesian National Standard (SNI) standard (<5.0%) and the PV value is also below the SNI limit (<10 meq O₂/kg). (3). The mathematicals model of relationship between FFAV shows a significant effect with a linear regression equation of Y = 0.436x + 0.0221 and a determination value (R²) of 0.0976. (4). This model indicates that an increase in FFA levels is directly proportional to an increase in peroxide value. The mathematical model obtained illustrates that an increase in PV is in line with an increase in FFA levels, both of which play an important role in determining the quality stability and storage durability of CPO.
Co-Authors ., Asmidi ., Nurrnalis Adittiya Prayoga Afrilita Harahap Agung Abadi Kiswandono Agus Haryono Agus Kembaren Ajat Sudrajat Ajeng Asri Audi Akhir Mauludin Pulungan Ambarwati Ambarwati Amdayani, Susilawati Andriayani Ani Sutiani Ary Anggara Wibowo Ary Anggara Wibowo Aryani, Widya Audi, Ajeng Asri Clara Nur Wandani Dewi Syafriani Dimas Ridho Dwi Siswanta Eddiyanto Eddiyanto Eddiyanto Fahmi, Jaman Girsang, Ermi Hafni Indriati Nasution Haqqi Annazili Nasution Harmileni Hasibuan, Muhammad Irvan 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 Khairatun Annisa Kurniawan, Ekin Dwi Arif Lastri Anita Silitonga Lisna Efiyanti Lisna Efiyanti malis, Nur Manalu, Elisabet Manurung, Elisa Manurung, MS Marham Sitorus Marta Adeliana Sijabat Mhd Fahmi midi, Jas Moondra Zubir MS Manurung Muhammad Hadi 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 Rahayu Rahayu Rahmani, Mei Ramadhan, Dwi Sapri Ramlan Silaban Ratna Sari Dewi Roza, Destria Rudi Munzirwan Siregar, Rudi Munzirwan Safitri, Wulan Dwi Saharman Gea Saragih, Gimelliya Sari, Dwy Puspita Shallomita, Grace Siahaan, Ella Oktavianna Sianturi, Irianani Ainung Simanjuntak, Evalina Br Simanjuntak, Janter Pangaduan 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 Timotius Agung Soripada Tita Juwitaningsih Trisunaryantr, Wega Triyono . Wardana, Dian Yasir Arafat Hutapea Yuli Asih Wiliranti Yusnidar, Erika Zuhairiah Nasution, Zuhairiah