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All Journal EKSAKTA: Journal of Sciences and Data Analysis JURNAL ILMU PERTANIAN Elkawnie Chimica et Natura Acta Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Jurnal Pendidikan Kimia (JPKim) JURNAL KIMIA SAINTEK DAN PENDIDIKAN JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) Jurnal Natural

Marpongahtun

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Sumatera Utara, Medan

Author-ID : 1916462

Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Neuroscience Physics Social Sciences

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Coconut oil effect on the hygroscopic properties of Simalambuo wood (Lophopetalum spp.) LIVER IMAN PUTRA ZAI; SAHARMAN GEA; MARPONGAHTUN MARPONGAHTUN; EDDYANTO EDDYANTO; NUR AZIZAH; APRI H SISWANTO
Jurnal Natural Volume 22 Number 2, June 2022
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jn.v22i2.24158

Simalambuo (Lophopetalum spp) trees are endemic to Southeast Asia and widely grow in the natural forests in Nias island. Local people whose experience of utilizing the simalambuo wood have claimed that the wood easily absorbs water. Throughout our searches, not many efforts to modify the physical properties of the simalambuo woods have been carried out yet. Therefore, in this study, we modified simalambuo wood by thermal treatment in coconut oil-ambient conditions. The heat treatment became an option to support the efforts in reducing the use of non-environmental-friendly materials and methods. The simalambuo wood was treated under coconut oil at 130-210oC for 6 hours. Coconut oil uptake was up to 174%, while the leaching test (AWPA E-06 standard) showed the uneasily permeate out from the wood and high retention differently in terms of treatment and cooling temperature. Heat treatment with coconut oil affected water absorption ability and improved dimensional stability of simalambuo wood. Water absorption reduced from 162% to 16%, and dimensional stability increased from 8.4% to 4.2% at 192 hours after being soaked in water. The higher the difference between treatment and cooling temperature, the better-affected water absorption ability was and the higher dimensional ability could be achieved.

Education on community empowerment in prevention of Covid-19 to the community Laut Dendang village, Percut Sei Tuan district Deli Serdang regency Mardiningsih; Suwilo, Saib; Mawengkang, Herman; Sutarman; Marpongahtun
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2020): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Community Service Activities carried out by the Service Team are intended to achieve the output target of reducing the spread of covid-19 in the people of Laut Dendang Village. The community service team conducts outreach regarding improving the quality of health and education in this village, in this case the Village Head, Hamlet Head, and PKK women become participants in this outreach, so that further all participants can socialize the issue of the importance of preventing Covid-19 and how to do it. prevention. It is hoped that the improvement of the quality of health in this village can be a lesson for the village community to understand and implement all knowledge or rules in reducing or stopping the spread of this deadly virus. This service is aimed at Community Service for the 2020 USU Lecturer Service Scheme is to solve problems together with the community through observation, problem identification, problem formulation, preparation of alternative solutions and evaluation of their implementation.

Training in the Manufacture of Softener Fragrance Aroma Therapy in Tembung Village, District Percut Sei Tuan Marpongahtun; Andriayani; Pratama, Agung; br Sembiring, Helmina; Prayugo, Aniza Salviana; Daulay, Amru
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 1 (2023): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v8i1.10326

Tembung Village, Percut Sei Tuan District, Deli Serdang Regency, North Sumatra Province, is a densely populated area. There are more than 200 laundry businesses. The potential for laundry business actors to produce softener and aromatherapy fabric softener has been hit very hard. However, the villagers, especially laundry business actors, do not know how to make these products. Making aromatherapy softeners independent will provide added value to the laundry business actors and villagers regarding economic costs and the transfer of knowledge of technology (science and technology commercialization). Therefore, the University of North Sumatra community service team wants to commercialize science and technology in making aroma softening therapy. The method used in this activity is the selection of partner locations, training, monitoring, and evaluation. The results of the questionnaire gave a value of 95% Participants were interested in training to produce aromatherapy softeners independently and took the initiative to make the results of this training a new opportunity.

Study of Provision of Cellulose Nanocrystal Derived From Palm Oil Empty Fruits Bunches (EFB) Marpongahtun; Aulia, Fenny; Gea, Saharman
Journal of Chemical Natural Resources Vol. 3 No. 2 (2021): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Isolation and characterization of cellulose nanocrystal of alpha-cellulose from Empty Fruit Bunch (EFB) have been performed. Empty Fruit Bunch (EFB) was delignificated with 3.5% HNO3 and NaNO2, precipitated with17.5% NaOH, bleaching process with 10% H2O2. Nanocrystal was obtained through the hydrolysis of alpha-cellulose using 45% H2SO4. Nanocrystal surface structures cellulose was analyzed by Scanning Electron Microscopy (SEM) and the results show that the resulting cellulose Nanocrystal size was 79 nm. Analysis of thermal degradation using Thermal Gravimetric Analysis (TGA) shows that the cellulose nanocrystal was started at 160ÂºC decomposes. It shows the process of cellulose nanocrystal that isolated from alpha-cellulose has occurred.

Synthesis of Carbon Dots From Empty Fruit Bunch Biochar an Acid-Free Hydrothermal Method Marpongahtun Marpongahtun; Rufina Pramudita; Saharman Gea; Amru Daulay
Elkawnie Vol. 9 No. 1 (2023)
Publisher : Faculty of Science and Technology Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v9i1.14524

Abstract: Carbon dots have gained much interest due to their outstanding optical and electrical properties, making them useful for a wide range of applications. Here Empty fruit bunch (EFB) biochar was used as a carbon source in a straightforward, environmentally friendly, and reproducible hydrothermal method for producing carbon quantum dots. In this study, the role of the hydrothermal process was seen and studied by comparing the shape and fluorescence. Exciting results from HRTEM show that the carbon quantum dots in the sample are 4 nm in size. The obtained CD emits bright blue luminescence, and the absorption peak of the carbon dots was observed in the UV region with maximum absorption at 205 nm and 322 nm. The light CD shows an intense sky blue color upon illumination by a UV-light source at 365 nm. The intensity of the photoluminescence (PL) spectra sharply increases with decreasing concentration of carbon dots. Meanwhile, the CD exhibited excitation-dependence, photo-stability, and well dispersibility. These results suggest that the present CD are potential applications in optoelectronics and imaging.Abstrak: Karbon dots telah menarik banyak perhatian karena sifat listrik dan optik yang luar biasa, sehingga dapat digunakan untuk berbagai aplikasi. Penelitian ini, menggunakan biochar tandan buah kosong (EFB) sebagai sumber karbon dengan metode hidrotermal yang ramah lingkungan untuk menghasilkan karbon dots. Hasil HR-TEM yang menarik menunjukkan bahwa sampel karbon dots berukuran 4 nm. Karbon dots yang diperoleh memancarkan sinar biru terang dan puncak serapan titik karbon diamati pada spektrofotometri Uv-Vis dengan serapan maksimum pada 205 nm dan 322 nm. Intensitas karbon dots menunjukkan warna biru langit di cahaya UV pada 365 nm. Intensitas spektroskopi luminesens meningkat tajam dengan menurunnya konsentrasi titik karbon. Sementara itu, karbon dots menunjukkan eksitasi, stabilitas, dan dispersibilitas baik. Hasil ini menunjukkan bahwa karbon dots dapat digunakan pada beberapa aplikasi seperti dalam optoelektronik dan pencitraan.

Co-Authors Adiansyah , Agung Pratama Amru Daulay Andriayani APRI H SISWANTO APRI H SISWANTO APRI H SISWANTO Ayu Syufiatun Cut Fatimah Zuhra Cut Fatimah Zuhra Darwin Yunus Daulay, Amru EDDYANTO EDDYANTO Fenny Aulia Ginting, Mimping Herman Mawengkang Khairul Amri LIVER IMAN PUTRA ZAI Mardiningsih Mimping Ginting NUR AZIZAH Prayugo, Aniza Salviana Riska Riska Rufina Pramudita Saharman Gea SAHARMAN GEA Saharman Gea SAHARMAN GEA Saib Suwilo Sembiring, Helmina Br. Sutarman Syufiatun, Ayu

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