Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 41-60 of 11098
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Efek Pemberian Ekstrak Etanol Biji Pinang (Areca catechu L.) terhadap Morfologi dan Histologi Testis Tikus (Rattus norvegicus L.) yang Diinduksi Aloksan
(Universitas Sumatera Utara, 2024)Diabetes Melittus (DM) can cause demage to the testicular structure. The content of secondary metabolites found in areca nut can be used as an antidiabetic agent. But information on the safety of areca nut ethanol extract ... -
Analisis Cluster dengan Average Linkage Method dan Ward’s Method pada Pengelompokan Kabupaten/Kota di Provinsi Sumatera Utara Berdasarkan Indikator Indeks Pembangunan Manusia Tahun 2022
(Universitas Sumatera Utara, 2024)Cluster analysis is an interdependence technique that can describe the proximity or similarity between objects and variables. Cluster analysis is divided into two methods: hierarchical and non-hierarchical. This study ... -
Karakterisasi Biosurfaktan dari Bakteri Bacillus cereus
(Universitas Sumatera Utara, 2024)Many studies have been carried out on the ability of bacteria to break down various hydrocarbon compounds including pesticides. Further research on the enzymes that code for these degrading genes have also been carried ... -
Sintesis Pati Sulfat dari Pati Ubi Kayu (Manihot esculenta) Menggunakan Asam Sulfamat-Urea dalam Pelarut DMSO
(Universitas Sumatera Utara, 2024)This study examines the Synthesis of Sulfate Starch from Cassava Starch (Manihot Esculenta) using Sulfuric Acid-Urea in DMSO Solvent. This research was carried out in two stages, namely, the isolation of cassava starch ... -
Potensi Ekstrak Etanol Buah Pare (Momordica charantia L.) Sebagai Renoprotektor pada Mencit (Mus musculus L.) Yang Dipaparkan Obat Antinyamuk Elektrik (Allethrin)
(Universitas Sumatera Utara, 2025)The ethanol extract of bitter melon (Momordica charantia L.) fruit contains of flavonoid compounds that has function as antioxidants by neutralizing of the free radicals. Electric mosquito repellents contain free radicals ... -
Pemanfaatan Ekstrak Etanol Buah Pare (Momordica charantia L.) sebagai Hepatoprotektor pada Mencit (Mus musculus L.) yang Dipaparkan Obat Antinyamuk Elektrik (Allethrin)
(Universitas Sumatera Utara, 2025)Free radicals found in electrical mosquito repellent can cause damage to the liver organs. The damage can be treated by administering antioxidants. Bitter melon (Momordica charantia L.) contains of the flavonoid compounds ... -
Pengembangan Metode Hibrida untuk Menyelesaikan Persoalan Rute Kendaraan (Vehicle Routing Problem)
(Universitas Sumatera Utara, 2024)The Vehicle Routing Problem (VRP) is a critical challenge in logistics, impact- ing delivery efficiency and costs. Traditional VRP solutions often fail to address real-world dynamics such as fluctuating traffic conditions ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Kacangan MB (Mucuna bracteata DC. ex Kurz)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compounds from the leaves of MB beans (M. bracteata DC. ex Kurz) had been carried out through maceration extraction with methanol solvent. The methanol extracted was concentrated, ... -
Pembuatan Dan Karakterisasi Biodegradable Foam Dari Powder Kulit Kakao Dan Powder Selulosa Daun Nenas Dengan Penambahan Polivinil Alkohol
(Universitas Sumatera Utara, 2025)Biodegradable foam was made and characterized from cocoa shell powder and pineapple leaf cellulose powder with the addition of polyvinyl alcohol as an environmentally friendly alternative to packaging using the baking ... -
Tingkat Kepekaan Staphylococcus sp. Isolat Lalat Rumah (Musca domestica L.) Sekitar Rumah Sakit terhadap Beberapa Jenis Antibiotik
(Universitas Sumatera Utara, 2025)Houseflies (Musca domestica L.) are vector that carry disease-causing agents microorganisms from one environment to the others. The presence of houseflies at the hospital environment is likely to carry pathogenic bacteria ... -
Sintesis Basa Schiff Pati Dialdehid dari Buah Sukun (Artocarpus Altilis) Menggunakan Metode Mikrowave Serta Potensinya sebagai Antibakteri
(Universitas Sumatera Utara, 2025)Schiff's base was synthesized through a condensation reaction between dialdehyde breadfruit starch (PD) and ethylenediamine, where PD was obtained from starch oxidation using sodium periodate oxidizer. The formation of ... -
Model Perencanaan Pemeliharaan Tanaman Berbasis Smart Farming
(Universitas Sumatera Utara, 2024)Operational planning in agricultural production systems plays a vital role in facilitating farmers decision-making process. This study introduces a novel mathematical model aimed at optimizing crop maintenance planning ... -
Analisis Regresi Linier Berganda dengan Faktor-Faktor yang Mempengaruhi Tingkat Kemiskinan di Provinsi Sumatera Utara Tahun 2021-2023
(Universitas Sumatera Utara, 2025)Poverty is one of the sources of problems that indirectly affects development and represents an economic inability to meet the minimum standard of living within a community in a certain region. This condition is caused by ... -
Perbandingan Metode Weighted Least Squares
(Universitas Sumatera Utara, 2025)In multiple linear regression analysis using the Ordinary Least Squares (OLS) method as the parameter estimator, that the resulting regression coefficient estimthere are assumptions that must be met so ates are Best Linear ... -
Impregnasi Fe/Ni Pada Mesopori Silika Template Metil Ester Risinoleat Sebagai Adsorben Cr6+ Dengan Variasi Penambahan Massa Fe
(Universitas Sumatera Utara, 2025)Chromium, especially Cr6+, is a heavy metal that is often used in industry can pollute the aquatic environment, and has high toxicity for humans, therefore, Cr6+ must be removed from the aquatic environment. Mesoporous ... -
Klasifikasi Curah Hujan Pengaruh Fenomena Indian Ocean Dipole (IOD) dan Madden Julian Oscillation (MJO) Berbasis Machine Learning Wilayah Deli Serdang
(Universitas Sumatera Utara, 2025)Rainfall in the Deli Serdang region is influenced by global climate phenomena. This study aims to determine the classification of rainfall based on machine learning with the SVM model due to the simultaneous occurrence of ... -
Pengendalian Persediaan Dengan Metode Economic Order Quantity Guna Optimalisasi Persediaan Bahan Baku Penunjang Panel APP PL (Studi Kasus: PT. Rahmat Kurnia Abadi)
(Universitas Sumatera Utara, 2025)This research aims to provide an overview of LPG raw material inventory control carried out by PT. Rahmat Kurnia Abadi and to find out the optimal number of orders for LPG raw materials, order frequency, amount of safety ... -
Analisa Logam Berat Plumbum (Pb) di Lahan Eks-Konsesi Pt TPL Desa Nagasaribu dengan Metode Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)
(Universitas Sumatera Utara, 2025)This study analyzes the heavy metal Lead (Pb) content in two ex-concession lands with different fertilization and spraying activities. In Land I (last activity in 2020), the highest lead concentration was found at Point ... -
Pembuatan dan Analisis Resin Komposit Sebagai Bahan Tambal Gigi Berbasis Urethane Dimethacrylate (UDMA) dan Triethylene Glycol Dimethacrylate (TEG-DMA) dengan Fotoinisiator Comphorquinone (CQ) dan Trimethylbenzoyl Phosphine Oxide (TPO)
(Universitas Sumatera Utara, 2024)In this work, urethane dimethacrylate (UDMA) was used as dental resin as an non-toxic alternative to Bisphenol A-glycidyl methacrylate (Bis-GMA). Additionally, UDMA combine with triethylene glycol dimethacrylate ... -
Isolasi Senyawa Flavonoid dan aktivitas Antioksidan Ekstrak Etil Asetat Biji Okra (Abelmoschus esculentus L.) sebagai sediaan Formulasi Face Toner.
(Universitas Sumatera Utara, 2025)Okra fruit (Abelmoschus esculentus L.) from the Malvaceae family has seeds that are thought to have flavonoid secondary metabolite compounds and have antioxidant activity that can be utilized as a preparation for face ...