Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 201-220 of 11420
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Penentuan Konsentrasi Logam Timbal, Kadmium, dan Seng pada Road Dust Suspension-Resuspension di Sekitar Dalam dan Luar Kawasan Industri Medan (KIM)
(Universitas Sumatera Utara, 2025)A study was conducted to analyze and compare the concentration of heavy metals Lead, Cadmium, and Zinc in Road Dust Suspension-Resuspension (RDS-R) around the inside and outside of the Medan Industrial Area (KIM). Road ... -
Analisis Konsentrasi Logam Kromium, Kadmium, dan Nikel dari Total Dissolved Solid Road Dust Suspension-Resuspension di Area Bawah Flyover Amplas
(Universitas Sumatera Utara, 2025)This study aims to determine the concentration of Chromium, Cadmium, and Nickel metals from Total Dissolved Solid Road Dust Suspension-Resuspension in the area under Amplas Flyover. The study was conducted by taking road ... -
Analisis Konsentrasi Logam Tembaga, Arsenik, dan Seng dalam Total Suspended Solid dari Road Dust Suspension–Resuspension di Kecamatan Medan Marelan
(Universitas Sumatera Utara, 2025)The development of transportation will result in exhaust gas or road dust which is very dangerous for public health and also the environment. This study was conducted to identify the concentration of metals in Total Suspended ... -
Pemanfaatan Cangkang Kerang Hijau (Perna viridis) sebagai Material Scaffold Carbonat Hidroksiapatit (CHA)
(Universitas Sumatera Utara, 2025)The utilization of green mussel shell (Perna viridis) waste as a calcium source for the synthesis of carbonate hydroxyapatite (CHA) scaffolds offers an environmentally friendly alternative in the field of bone tissue ... -
Mahalanobis Distance dan Principal Component Analysis Menggunakan Metode Robust Minimum Covariance Determinant (MCD) dan Minimum Volume Ellipsoid (MVE)
(Universitas Sumatera Utara, 2025)In multivariate analysis, estimates of the mean and covariance matrix are used as the basis for calculations in the Mahalanobis Distance (MD) and Principal Component Analysis (PCA) statistical techniques. However, the ... -
Penentuan Rute Terpendek antara Stasiun Kereta Api Medan dan Universitas Sumatera Utara dengan Algoritma Greedy dan Floyd-Warshall
(Universitas Sumatera Utara, 2025)Transportation is an important factor in supporting community mobility, especially in dense areas such as Medan City. The route between Medan Railway Station and the University of North Sumatra (USU) is one of the strategic ... -
Karakterisasi Edible Coating dari Nanopartikel Pati Biji Durian dan Minyak Atsiri Serai untuk Memperpanjang Masa Simpan Anggur Merah
(Universitas Sumatera Utara, 2025)This study analyzes the characteristics of edible coating based on durian seed starch nanoparticles added with lemongrass essential oil. The combination of durian seed starch nanoparticles with essential oil can be used ... -
Efektivitas Bioadsorben dari Limbah Kulit Durian Teraktivasi Asam Fosfat (H3PO4 ) dalam Penurunan Kadar Logam Besi (Fe) pada Air Sumur Gali
(Universitas Sumatera Utara, 2025-07-17)The levels of iron (Fe) metal can be reduced by adsorption in water using durian skin waste adsorbent containing cellulose as the basic material for making activated carbon. This study aims to determine how to make activated ... -
Karakterisasi Edible Coating dari Nanopartikel Pati Biji Durian dengan Minyak Atsiri Lemon untuk Memperpanjang Masa Simpan Buah Stroberi
(Universitas Sumatera Utara, 2025)Durian is a tropical fruit widely consumed in Indonesia, which generates waste in the form of peels and seeds. Durian seeds have potential to be utilized as a starch source, which can be processed into a base material for ... -
Pembuatan Mi Kering dari Pati Biji Alpukat (Persea americana) Termodifikasi dengan Metode Fermentasi serta Penambahan Tepung Mocaf dan Garam Fosfat
(Universitas Sumatera Utara, 2025)The utilization of avocado seed waste (Persea americana) as a raw material for dried noodle production represents an innovative approach to the development of functional foods based on local resources. This study aimed to ... -
Efektivitas Dan Formulasi Sediaan Moisturizer Berbasis Karboksimetil Kitosan Dengan Penambahan Niacinamide Sebagai Agen Whitening
(2025)Research has been conducted on the use of carboxymethyl chitosan in the formulation of moisturizer preparations as antioxidant. Moisturizer is a product that helps hydrate the skin and can also provide a brightening effect ... -
Sintesis Metil Eugenol Melalui Reaksi Eterifikasi pada Variasi Mol Kalium Karbonat dan Dimetil Karbonat
(Universitas Sumatera Utara, 2025)This study aims to synthesize methyl eugenol through etherification reaction at various moles of potassium carbonate as base and dimethyl carbonate as methyl group donor. The reaction was carried out under reflux conditions ... -
Analisis Kandungan Cr, Mn, Zn Berdasarkan Kelarutan Dalam Air pada Debu Jalan di Jalan Jenderal Besar A.H. Nasution
(Universitas Sumatera Utara, 2025)Road dust can be contaminated with heavy metals from non-exhaust vehicle emission. Rainfall can carry these heavy metals to water bodies and causing pollution that endangers living organism. This research aims to determine ... -
Aktivitas Antioksidan dan Antimikroba Minyak Nilam (Pogostemon cablin Benth.) dari Hidrodistilasi Menggunakan Radiasi Mikrowave dan Pra-Perlakuan Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025)A combination of homogenizer-assisted cell disruption and microwave-assisted hydrodistillation was conducted to extract patchouli oil (Pogostemon cablin Benth.). This study investigated the effect of stirring time (5, 10, ... -
Preparasi dan Karakterisasi Hybrid Bionanokomposit Berbahan Polycaprolacton dengan Pengisi Nano Abu Sekam Padi dan Nano TiO2 Sebagai Material Adsorben Limbah Methyl Red
(Universitas Sumatera Utara, 2025)Wastewater contamination by synthetic dyes such as Methyl Red poses serious environmental and health risks, necessitating effective remediation methods. This study investigates an eco-friendly hybrid bionanocomposite based ... -
Kajian Model SITR (Susceptible - Infected - Treatment - Recovered) pada Penyebaran Penyakit HIV/AIDS di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)This study aims to examine and apply the SITR (Susceptible-Infected-Treatment-Recovered) model to the spead of HIV/AIDS in North Sumatra. This model is divided into 4 compartments, namely the population of individuals ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Cemara Angin (Casuarina cunninghamiana Miq.)
(Universitas Sumatera Utara, 2025)The isolation and identification of flavonoid compounds from the bark of Casuarina cunninghamiana Miq. have been carried out through several stages, beginning with maceration extraction using methanol as the solvent, ... -
Pemanfaatan Karbon Aktif Dari Rumput Gajah (Pennisetum purpereum) Dan Mangan Dioksida Sebagai Elektroda Superkapasitor
(Universitas Sumatera Utara, 2025)The growing need for sustainable and eco-friendly energy storage solutions has led to advancements in high-performance supercapacitors with extended cycle life. This research explores the fabrication of composite electrodes ... -
Sintesis Hidrogel Komposit Selulosa Karboksimetil Kulit Durian Dengan Penambahan Grafena Oksida Dan Tio2 Sebagai Adsorben Metilen Biru
(Universitas Sumatera Utara, 2025)The synthesis of a composite hydrogel based on carboxymethyl cellulose derived from durian rind, combined with PVA-ALG polymer, and supplemented with fillers in the form of graphene oxide and TiO₂ at varying concentrations ... -
Pembuatan dan Karakterisasi Superabsorben Polimer Berbasis Natrium Karboksimetil Selulosa dan Hidroksietil Metil Selulosa Menggunakan Asam Suksinat sebagai Agen Ikat Silang
(Universitas Sumatera Utara, 2025)This study examines the preparation of polymer superabsorbent from sodium carboxymethyl cellulose (Na-CMC) and hydroxyethyl methyl cellulose (HEMC) with succinic acid crosslinking agent. The preparation of polymer ...