Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1201-1220 of 11350
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Karakteristik Nanopartikel C,N,F untuk Material Pembersih Air Limbah Logam Berat Cu dan Cr
(Universitas Sumatera Utara, 2023)Magnetic nanoparticle material has been synthesized using the coprecipitation method. The preparation process begins by mixing iron sand powder with 32% HCl solvent. After that the solution was added with CoCl2, NiCl2, ... -
Efektivitas Karbon Aktif dari Limbah Pulp Kertas terhadap Penurunan Logam Tembaga (Cu)
(Universitas Sumatera Utara, 2023)Pulp is a raw material for papermaking that is still limited in terms of its utilization. Pulp has a relatively high content of cellulose, lignin, hemicellulose, and carbon which has the potential as activated carbon in ... -
Identifikasi Proyeksi Perubahan Iklim terhadap Probabilitas Penyakit Demam Berdarah Dengue di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2023)Indonesia has a tropical climate with warm temperatures and high rainfall variability, which is a comfortable place for the Aedes Aegypti mosquito. Clear evidence of climate change is the increase in global air temperature ... -
Sintesis dan Karakterisasi Karboksimetil Kitosan pada Sediaan Deodoran Sebagai Aktivitas Antibakteri
(Universitas Sumatera Utara, 2023)Research has been conducted on the synthesis and characterization of chitosan modified by the esterification process into carboxymethyl chitosan as an antibacterial ingredient in deodorant formulations. Deodorant is a ... -
Pemanfaatan Zeolit Alam Pahae dalam Pembuatan Beton Polimer Menggunakan Serat Kulit Jagung dan Resin Polyurethane sebagai Perekat
(Universitas Sumatera Utara, 2023)Research has been carried out on polymer concrete with Pahae natural zeolite aggregate and corn husk fibers and polyurethane resin fibers as adhesives using a hot press at 170 ℃ for 30 minutes, which aims to determine the ... -
Perengkahan Katalitik Minyak Jelantah Secara Kontinyu untuk Produksi Bahan Bakar Hidrokarbon Menggunakan Katalis Oksida Logam Feo/Cr2o3
(Universitas Sumatera Utara, 2023)Biofuels consisting of hydrocarbon compounds have been studied to have great potential as a substitute for fossil fuels whose availability is increasingly limited. Research has been carried out on the continuous catalytic ... -
Pengaruh Penambahan Zeolit Alam Pahae terhadap Karakterisasi Beton Polimer Berbasis Serat Kulit Jagung dengan Resin Epoksi
(Universitas Sumatera Utara, 2023)Research has been conducted on polymer concrete with sand, pumice, and corn husk fiber aggregates and zeolite as filler and epoxy resin using hotpress at 90℃ for 30 minutes, with the aim of knowing the utilization, ... -
Perengkahan Katalitik Minyak Jelantah Menjadi Biofuel dengan Katalis Oksida Logam dari Pasir Alam/Fly Ash
(Universitas Sumatera Utara, 2023)National oil reserves are decreasing daily, this is due to the non-renewable nature of fossil fuels. Alternative energy sources are needed as a substitute for fuel by utilizing vegetable oil, which is commonly called ... -
Sintesis Nanokristalin Selulosa dari Daun Nanas Serta Pengaruhnya Sebagai Bahan Aditif dalam Meningkatkatkan Kualitas Kertas Daur Ulang
(Universitas Sumatera Utara, 2023)Pineapple leaves are abundantly available as waste in North Tapanuli district in the Sipahutar District. Due to its high cellulose content, it is a potential source for extraction to produce nanocrystalline cellulose ... -
Sintesis Metil Ester Asam Lemak dari Palm Oil dengan Katalis Abu Kulit Durian dan Radiasi Microwave
(Universitas Sumatera Utara, 2023)The synthesis of fatty acid methyl esters from palm oil has been carried out by transesterification reactions using durian peel ash as a heterogeneous catalyst. Durian peel powder was heated at 600°C for 4 hours and ... -
Peningkatan Sifat Hidrofobisitas Kertas Liner Berbasis Tandan Kosong Kelapa Sawit dengan Penambahan Palm Wax
(Universitas Sumatera Utara, 2023)Research on improving the hydrophobicity properties of oil palm empty bunch-based paper liners has been completed. Paper liner is paper used as insulation and coating on cardboard paper. Cardboard paper stored for too ... -
Pembuatan Superabsorben Polimer Berbasis Karboksimetil Selulosa dan Hidroksipropil Metil Selulosa dengan Divinil Sulfon Sebagai Agen Ikat Silang
(Universitas Sumatera Utara, 2023)This study examines the manufacturing and characterization process of superabsorbent polymer (SAP) based on carboxymethyl cellulose (CMC) and hydroxypropyl methyl cellulose (HPMC) with divinyl sulfone (DVS) crosslinking ... -
Analisis Pengaruh Layanan E-Learning terhadap Kepuasan Pengguna dengan Pendekatan Structural Equation Modeling (Studi Kasus: Mahasiswa Universitas Sumatra Utara)
(Universitas Sumatera Utara, 2023)E-learning has been implemented at the University of North Sumatra as a means of supporting PBM (teaching and learning process) since the beginning of Covid-19. Courses that already use the PMB are one of the objects in ... -
Model Peramalan Harga Minyak Mentah Indonesia berdasarkan Metode Fuzzy Time Series Model Chen Dan Model Markov Chain
(Universitas Sumatera Utara, 2023)Indonesian Crude Oil Price (ICP) has a major impact for the preparation of State Budget and Revenue (APBN) because it is one of Indonesian’s state revenue in the export sector. Forecasting of ICP can help to make a better ... -
Pemanfaatan Limbah Pulp dari Pt. Toba Pulp Lestari Sebagai Karbon Aktif dalam Penurunan Logam Zink (Zn)
(Universitas Sumatera Utara, 2023)Waste pulp and paper has a high component of cellulose fibers that have the potential to become activated carbon. But so far pulp waste is still underutilized as activated carbon. The purpose of this study was to ... -
Pemisahan Campuran Metil Ester Hasil Transesterifikasi Minyak Jarak dengan Adsorben CaSiO3 Menggunakan Eluen Larutan Dietil Eter Konsentrasi 20%-50% dalam Heksana
(Universitas Sumatera Utara, 2023)Separation of the methyl ester mixture resulting from the transesterification of castor oil and CaSiO3 as adsorbent has been carried out using diethyl ether solution with a concentration of 20% -50% in hexane as an ... -
Uji linearitas CT Number dan Resolusi Spasial Menggunakan ACR 464 Phantom Pada Kualitas Citra Pesawat CT-Scan 16 Slice”
(Universitas Sumatera Utara, 2023)Research has been carried out on the CT Number linearity test and spatial resolution on CT-Scan images using the American College of Radiology (ACR) Phantom. The aim is to determine the correlation coefficient formed from ... -
Keanekaragaman Makrofauna Tanah Pada Areal Tanaman Kacang- Kacangan di Areal UPT Benih Induk Tanjung Selamat Kabupaten Deli Serdang
(Universitas Sumatera Utara, 2023)Soil macrofauna diversity is one of the biological natural resources that is very beneficial to the environment. Its existence is influenced by biotic, as well as biotic, factors around it. Abiotic factors that pervade ... -
Makrofauna yang Aktif di Permukaan Tanah Sebagai Spesies Bioindikator Pada Areal Upt Benih Induk Palawija dan Hortikultura Tanjung Selamat Kabupaten Deli Serdang
(Universitas Sumatera Utara, 2023)Soil macrofauna is part of soil biodiversity which plays an important role in improving soil physical, chemical, and biological properties. Soil macrofauna has an important role in the decomposition of soil organic matter ... -
Pemisahan Metil Ester Asam Risinoleat, Linoleat, Oleat, dan Stearat yang diperoleh dari Minyak Jarak menggunakan Adsorben SrSiO 3 dengan Larutan Alkohol berkonsentrasi 0,1 0,4% dalam Heksana
(Universitas Sumatera Utara, 2023)Separation of ricinoleic, linoleic, oleic and stearic acid esters obtai ned from castor oil using SrSiO 3 adsorbent with 0.1 0.4% alcoholic solution in hexane has been carried out. The formation of a methyl ester is ...