Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 181-200 of 11448
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Optimasi Hidrodistilasi Minyak Nilam (Pogostemon cablin Benth.) dengan Radiasi Mikrowave serta Uji Aktivitas Antioksidan dan Antimikroba
(Universita Sumatera Utara, 2025-07-22)Hydrodistillation of patchouli oil (Pogostemon cablin Benth.) under microwave radiation and pre-treatment by stirring with a homogenizer has been carried out. The parameters of the ratio of patchouli leaves to distilled ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Andromeda Jepang (Pieris Japonica (Thunb.) D.Don Ex G.Don)
(Universitas Sumatera Utara, 2025)The isolation and identification of flavonoid compounds from the bark of Japanese andromeda (Pieris japonica (Thunb.) D.Don ex G.Don) had been carried out. The isolation was conducted through maceration extraction using ... -
Aplikasi Edible Coating dari Pektin Kulit Jeruk Manis dengan Isolat Protein Ikan Teri Terhadap Kualitas Buah Anggur Hijau Muscat
(Universitas Sumatera Utara, 2025)Pectin is a natural polysaccharide compound that has the potential as a basic ingredient for environmentally friendly gelling agents, thus playing a role in reducing the impact of environmental pollution due to synthetic ... -
Automorfisma Graf Bunga Matahari
(Universitas Sumatera Utara, 2025)A graph automorphism is an isomorphism from a graph $G$ to itself a function that maps a graph to itself one-on-one and onto, and preserves the adjacency relation between the vertices of the graph, if two vertices are ... -
Sintesis Metil Oleat Dari Asam Oleat dan Metanol pada Variasi Waktu Reaksi dan Konsentrasi Katalis CaO/Zeolit Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025)Synthesis of methyl oleate from esterification reaction between oleic acid and methanol catalyzed by CaO/Zeolite using a homogenizer device at room temperature was carried out at different variations, namely catalyst ... -
Metode Fuzzy Time Series Average Based untuk Peramalan Tingkat Suku Bunga Acuan Bank Indonesia
(Universitas Sumatera Utara, 2025)Forecasting the Bank Indonesia benchmark interest rate (BI Rate) is one of the essential indicator in monetary policy and national economic, as its fluctuations directly affect inflation, the exchange rate, the banking ... -
Penentuan Kadar Besi (Fe) dan Tembaga (Cu) pada Air Sumur Bor Sebelum dan Sesudah Penyaringan Menggunakan Tabung Penyaring FRP (Fiberglass Reinforced Plastic)
(Universitas Sumatera Utara, 2025)Groundwater in several areas still contains heavy metals and has a physical quality that does not meet drinking water quality standards, so effective filtering efforts are needed. One method used is the application of a ... -
Pemanfaatan Energy Panas Buangan Dari Tungku Pembakaran Sampah rumah Tangga Menggunakan Modul Thermoelektrik Generator
(Universitas Sumatera Utara, 2025)Utilization of waste heat energy from burning household waste is one of the innovative solutions to support energy efficiency and waste management. This study aims to evaluate the potential for converting waste heat energy ... -
Pengaruh Elektrolit Amonium Klorida Terhadap Kinerja Elektroda Grafena Berlapis Nano dari Cangkang Kemiri (Aleurites moluccana (L.) Willd) Pada Katoda Baterai Primer
(Universitas Sumatera Utara, 2025)Research on the Effect of Ammonium Chloride Electrolyte on the Performance of Graphene Nano Sheets Electrode from Candlenut Shell (Aleurites moluccana (L.) Willd) on Primary Battery Cathode has been conducted. The purpose ... -
Sintesis Dan Karakterisasi Nanokomposit Fe₃O₄/Nitrogen-Doped Carbon Dots (N-CDs) Dengan Metode Sonikasi
(Universitas Sumatera Utara, 2025)Nitrogen-Doped Carbon Dots (N-CDs), which are water-soluble, tend to be difficult to separate from the aqueous phase. To overcome this issue, Fe₃O₄ is used as a nanocomposite-forming material due to its magnetic properties, ... -
Digraf Eksentrik dari Graf Barbel
(Universitas Sumatera Utara, 2025)This study investigates the structure of the eccentric digraph ED(G) of barbell graphs, which are formed by connecting two graphs (either complete or cyclic) via a path. The four types of barbell graphs analyzed include: ... -
Perbandingan Algoritma Welch-Powell, Algoritma Greedy, dan Algoritma Recursive Largest First dalam Penjadwalan Mata Pelajaran di SMP Swasta Islam Terpadu Iqra
(Universitas Sumatera Utara, 2025)This research aims to compare the Welch-Powell algorithm, the Greedy algorithm, and the Recursive Largest First algorithm in scheduling subjects for the odd semester of the 2024/2025 academic year at SMP Swasta Islam Terpadu ... -
Pembuatan dan Karakterisasi Termoplastik Elastomer dari Paduan EPDM/Polipropilena dengan Pengisi Serbuk Tanah Liat sebagai Peredam Benturan Pintu Kendaraan
(Universitas Sumatera Utara, 2025)The increase in the number of vehicles in Indonesia creates opportunities for the rubber component industry, including weather strips for car doors. This study aims to produce a blend of EPDM and polypropylene with ... -
Sintesis dan Karakterisasi Paduan LDPE/EPDM dengan Bahan Pengisi Serbuk Tanah Liat sebagai Peredam Benturan Pintu Kendaraan
(Univesitas Sumatera Utara, 2025)A composite study was conducted using a blend of LDPE/EPDM with the addition of clay powder as a filler, applied as an impact absorber for vehicle door seals. The manufacturing process involved mixing LDPE plastic with ... -
Sintesis Fe3O4/ZIF-8 dari Pasir Besi sebagai Adsorben Logam Berat Pb(II): Studi Efektivitas Adsorpsi terhadap Waktu Kontak
(Universitas Sumatera Utara, 2025-07-21)The rapid industrialization and urbanization have increased environmental pollution, particularly by toxic heavy metals like Pb(II), which pose serious health risks. WHO reports that Pb(II) exposure causes over 1.5 million ... -
Studi Sifat Bioaktif dan Fungsional Kombucha dengan Goji Berry (Lycium barbarum ) Aktivitas Antioksidan, Antimikroba dan Uji Toksisitas
(Universitas Sumatera Utara, 2025)The bioactive and functional properties of Goji berry (Lycium barbarum) kombucha, including its antioxidant, antimicrobial, and toxicity profiles, have been examined. This study aimed to evaluate how the addition of Goji ... -
Analisis Pupuk Anorganik Cair Dengan Penambahan Asam Amino Terhadap Pertumbuhan Sawi Hijau (Brassica juncea L.)
(Universitas Sumatera Utara, 2025)Analysis of liquid inorganic fertilizer with the addition of amino acids on the growth of mustard greens (Brassica juncea L.) has been conducted. This study aims to analyze the effect of variations in the addition of amino ... -
Kinerja Nikel/Grafena Berlapis Nano dan Perak/Grafena Berlapis Nano dari Cangkang Kemiri Menggunakan Metode Pirolisis Sebagai Antibakteri Staphylococcus aureus
(Universitas Sumatera Utara, 2025)Research on the Performance of Nickel/Graphene Nano Sheets (Ni/GNS) and Silver/Graphene Nano Sheets (Ag/GNS) from Candlenut Shells Using Pyrolysis Method as Antibacterial Staphyloccocus aureus has been conducted. The purpose ... -
Pembuatan Handbody Cream dari Eksktrak Etanol Daun Kemuning (Murraya panicula L Jack) dengan Uji Antioksidan Metode DPPH dan Uji Toksisitas
(Universitas Sumatera Utara, 2025)Handbody cream is a skin care product in the form of cream that is used to moisturize and care for the body skin, including hands, feet, and other body parts. The leaves of Kemuning contain several alkaloid compounds that ... -
Analisis Model Casson pada Aliran Pseudoplastik Darah terhadap Masalah Obesitas di Arteri Abdominal
(Universitas Sumatera Utara, 2025)Blood flow in arterial vessels exhibits complex non-Newtonian behavior, especially under pathological conditions such as obesity. Obesity is a major risk factor for the development of cardiovascular diseases, as it ...