Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 21-40 of 11533
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Pengembangan Beton Berpori Nano Green Engineering Berbasis Cangkang Kerang Dara dengan SiO2 Abu Boiler Kelapa Sawit dan Zeolit Alam Pahae
(Universitas Sumatera Utara, 2025)This study aims to develop a nano green engineering porous concrete using blood cockle shells combined with SiO2 extracted from palm oil boiler ash (POBA) and Pahae natural zeolite as partial cement replacements. The goal ... -
Pengembangan Komposit Phase Change Materials (PCM) dan Magnetit (Fe3O4) sebagai Beton Penyimpan Termal
(Universitas Sumatera Utara, 2025)This study aims to develop a phase change material (PCM) composite based on paraffin wax and polyethylene glycol (PEG6000), reinforced with magnetite (Fe3O4) nanoparticles, to enhance the thermal conductivity of concrete ... -
Analisis Respons Frekuensi Bode dan Nyquist pada Pengendali PID Berdasarkan Data Sensor Aliran dan Tekanan dalam Multi Loop Controller pada Sistem Fluida
(Universitas Sumatera Utara, 2025)This study aims to analyze the frequency response of a fluid system controlled by a PID (Proportional-Integral-Derivative) controller using flow and pressure sensor data. Data were collected from a Multi-Loop Controller ... -
Modifikasi Pati Sukun (Artocarpus altilis) Teroksidasi Menggunakan Natrium Perborat
(Universitas Sumatera Utara, 2025)Modification of breadfruit starch into carboxylate starch has been carried out through an oxidation reaction between breadfruit starch (Artocarpus altilis) and sodium perborate. The oxidation reaction was carried out ... -
Keanekaragaman Makrozoobenthos di Sungai Tanjung Pura, Kabupaten Langkat, Sumatera Utara
(Universitas Sumatera Utara, 2026)The Tanjung Pura River, Langkat Regency, North Sumatra, is an aquatic ecosystem experiencing anthropogenic pressure from livestock farming activities, former sand dredging, and domestic waste. This study aims to analyze ... -
Sintesis Wet Strength Agent (WSA) Berbasis Selulosa melalui Reaksi antara Selulosa Dialdehida dengan Dietanolamina
(Universitas Sumatera Utara, 2025)The synthesis of a cellulose-based wet strength agent (WSA) was carried out by isolating cellulose from oil palm empty fruit bunches (EFB) using HNO₃, NaOH, Na₂SO₃, NaOCl, and H₂O₂ solutions, yielding 19.102 g of cellulose ... -
Isolasi dan Uji Aktivitas Antijamur Ekstrak Etanol dan N-Heksan Tanaman Ciplukan (Physalis Angulata L.) terhadap Jamur Patogen Klinis
(Universitas Sumatera Utara, 2026)Ciplukan (Physalis angulata L.) is a medicinal plant that contains secondary metabolites with potential as an alternative to synthetic antibiotics for antifungal therapy. This study aimed to determine the phytochemical ... -
Studi Komparatif Random Forest dan Regresi Logistik Elastic Net pada Klasifikasi Status Pulang FKTP BPJS Kesehatan: Kajian F1-Score, PR-AUC, dan Brier Score
(Universitas Sumatera Utara, 2026)This study analyzes and compares the performance of Random Forest and Elastic Net Logistic Regression (SAGA solver) for classifying patient discharge status at BPJS Kesehatan Primary Care Facilities (FKTP). The dataset is ... -
Sintesis Polifenalkamin dari Kardanol Hasil Isolasi Kulit Biji Mete (Anacardium occidentale.L) dengan Variasi Mol Formladehida Serta Uji Antikorosi dan Antibakteri
(Universitas Sumatera Utara, 2025)Polyphenalkamine was synthesized via a Mannich reaction between cardanol, ethylenediamine, and formaldehyde. The synthesis was carried out by mixing cardanol, ethylenediamine, and formaldehyde under reflux for 3.5 hours. ... -
Pembuatan Karbon Aktif dari Kulit Singkong (Manihot Utilissima) untuk Penurunan Kadar Logam Besi (Fe) pada Air Sumur Bor
(Universitas Sumatera Utara, 2025)Borehole water in some areas often contains iron metal (Fe) that exceeds the threshold set by Permenkes No. 2 Year 2023, which is 0.2 mg/L. Excess iron content can reduce water quality and cause health problems. This study ... -
Isolasi Dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Rambai (Baccaurea motleyana Müll. Arg)
(Universitas Sumatera Utara, 2025)Flavonoid compounds were successfully isolated from rambai (Baccaurea motleyana) stem bark through maceration-methanol extraction, followed by partition extraction using ethyl acetate and n-hexane solvents. The result was ... -
Modifikasi Pati Sukun (Artocarpus altilis) Teroksidasi Menggunakan Natrium Bromat
(Universitas Sumatera Utara, 2025)Modification of breadfruit starch (Artocarpus altilis) into carboxylated starch through oxidation reaction using sodium bromate as an oxidizer has been carried out. The modification was performed with a mass ratio of ... -
Pembuatan Karbon Aktif dari Kulit Singkong (Manihot Utilissima) untuk Penurunan Kadar Logam Besi (Fe) pada Air Sumur Bor
(Universitas Sumatera Utara, 2026)Borehole water in some areas often contains iron metal (Fe) that exceeds the threshold set by Permenkes No. 2 Year 2023, which is 0.2 mg/L. Excess iron content can reduce water quality and cause health problems. This study ... -
Modifikasi Pati Sukun (Artocarpus altilis) Teroksidasi Menggunakan Natrium Bromat
(Universitas Sumatera Utara, 2026)Modification of breadfruit starch (Artocarpus altilis) into carboxylated starch through oxidation reaction using sodium bromate as an oxidizer has been carried out. The modification was performed with a mass ratio of starch ... -
Perancangan Prototype Pembangkit Listrik Tenaga Uap Berbasis IoT dari Panas Tungku Pirolisis Sampah Plastik
(Universitas Sumatera Utara, 2025)The demand for electrical energy in Indonesia continued to rise alongside the growth of industry and technology, while the availability of fossil energy sources continued to decline. Utilizing heat from the plastic-waste ... -
Modifikasi Pati Sukun (Artocarpus altilis) Teroksidasi Menggunakan Agen Pengoksidasi Kalium Bromat
(Universitas Sumatera Utara, 2025)The isolation stage of breadfruit starch and the modification stage of breadfruit starch through an oxidation reaction with variations in time for 3 hours, 6 hours, 9 hours and variations in oxidant concentration of ... -
Isolasi dan Identifikasi Senyawa Golongan Flavonoida dari Biji Buah Longan (Dimocarpus longan Lour.)
(Universitas Sumatera Utara, 2025)Longan fruit seeds (Dimocarpus longan Lour.) were explored for their potential as a source of flavonoid compounds through a series of isolation and structural identification techniques, namely extraction by methanol solvent ... -
Kepadatan Tikus dan Ektoparasitnya di Pemukiman Padat Penduduk di Kelurahan Mesjid, Kecamatan Medan Kota, Kota Medan, Sumatera Utara
(Universitas Sumatera Utara, 2026)This study was conducted to determine the types of rats and their ectoparasites, the relative density (trap success) of rats, the specific flea index (SFI), the prevalence, and the intensity of ectoparasite infestation ... -
Rancang Bangun Alat Ukur Massa Tertelusur Berbasis Internet of Things (IoT)
(Universitas Sumatera Utara, 2025)This study aims to develop a digital mass measurement device with a maximum capacity of 200 kilograms that is traceable to the national mass standard (M2) and integrated with the Internet of Things (IoT) using the Blynk ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Eukaliptus (Eucalyptus grandis W. Hill ex Maiden)
(Universitas Sumatera Utara, 2026)The isolation and identification of flavonoid compounds obtained from the bark of eucalyptus tree (Eucalyptus grandis W. Hill ex Maiden) was carried out using several methods, namely maceration extraction with methanol ...