Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 221-240 of 11448
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Karakterisasi Edible Coating Berbahan Pektin/Kitosan/Ekstrak Daun Kenikir (Cosmos Caudatus) Untuk Meningkatkan Umur Simpan Pada Buah Tomat
(Universitas Sumatera Utara, 2025)An edible coating based on pectin, chitosan, and the addition of Cosmos caudatus (kenikir) leaf extract was developed in this study. The aim of lhe research was to determine the characteristics of the edible coating and ... -
Sintesis Metil Oleat dari Esterifikasi Asam Oleat dan Metanol pada Perbandingan Rasio Mol dan Berat Enzim Lipase Menggunakan Peralatan Pendispersi Homogen
(Universitas Sumatera Utara, 2025)The synthesis of methyl oleate from oleic acid and methanol through esterification has been performed using homogeneous dispersion equipment and lipase enzyme as a catalyst. This study focuses on the effect of variations ... -
Formulasi Dan Karakterisasi Sediaan Essence Kitosan Pada Sheet Mask Sebagai Antibakteri Propionibacterium Acnes
(Universitas Sumatera Utara, 2025)Research has been carried out on the use of chitosan in the formulation of a essence sheet mask as an antibacterial. Sheet masks are one of the cosmetics that are widely used by consumers because they contain essence which ... -
Evaluasi Profil Fisikokimia dan Fitokimia Kombucha Berbasis Goji Berry (Lycium barbarum)
(Universitas Sumatera Utara, 2025)Kombucha is traditionally produced using tea; however, it can also be formulated from a variety of alternative substrates, including fruits, herbs, vegetables, and spices. This study investigated the use of goji berries ... -
Analisis dan Karakterisasi pada Scaffold Karbonat Hidroksiapatit (CHA) Berbahan Dasar Biowaste Cangkang Kerang Darah (Anadara granosa)
(2025)Utilization of shellfish waste (Biowaste) as a source of calcium in Carbonate Hydroxyapatite (CHA) Scaffolds that can provide an alternative in environmentally friendly bone tissue engineering. This study aims to make CHA ... -
Analisis Sensitivitas pada Integer Linear Programming Menggunakan Metode Branch and Bound untuk Optimasi Jumlah Produksi Seragam Sekolah pada UD Hesty
(Universitas Sumatera Utara, 2025)UD Hesty is a garment company that produces school uniforms and faces challenges in determining the optimal production quantity. These challenges are due to limited raw materials. Inaccurate decisions can lead to inefficient ... -
Efek Over Current Pada Kabel Penghantar Listrik Jenis Tembaga (Cu) Berisolasi Polivinyl Chloride (PVC) terhadap Inisiasi Penyebab Kebakaran
(Universitas Sumatera Utara, 2025)This study aims to analyze the physical and chemical effects of electromigration failure caused by overcurrent in copper (Cu) cables as a potential initiator of electrical fires. Testing was conducted on PVC-insulated ... -
Pembuatan dan Karakterisasi Superabsorben Polimer Berbasis Natrium Karboksimetil Selulosa dan Hidroksietil Metil Selulosa dengan Asam Ftalat Sebagai Agen Pengikat Silang
(Universitas Sumatera Utara, 2025)This study examines the process of making and characterizing superabsorbent polymer (SAP) based on Sodium Carboxymethyl Cellulose (Na-CMC) and Hydroxyethyl Methyl Cellulose (HEMC). The manufacture of superabsorbent polymer ... -
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 ...