Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 701-720 of 11355
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Studi dan Karakterisasi Tribofilm Berbasis Karbon Aktif Cangkang Kelapa Sawit dan Nanokitosan Kulit Udang yang Dicampur Minyak Silikon sebagai Aplikasi Pelapis Self-Healing pada Permukaan Logam CU dan AL
(Universitas Sumatera Utara, 2023)Active carbon and silicon oil modified nanochitosan based-tribofilm materials was made by using sol gel method with the variation of active carbon composition in the ratio of 40%wt:60%wt at the interval of 5%wt. The ... -
Aktivitas Antioksidan dan Antibakteri dari Ekstrak Daun Eucalyptus (Eucalyptus pellita) serta Isolasi Senyawa Flavonoid
(Universitas Sumatera Utara, 2024)Eucalyptus pellita is one of the species from the Myrtaceae family that is considered a potential allelopath. This study aims to test the bioactivity and isolate flavonoid compound from E. pellita leaf extract. E. pellita ... -
Adsorben Zeolit Alam Pahae-Kitosan dan Abu Boiler Kelapa Sawit sebagai Pereduksi Logam Berat pada Air Limbah Domestik di Kota Medan
(Universitas Sumatera Utara, 2024)This research examines zeolite-chitosan based adsorbents with the addition of palm oil boiler ash to absorb heavy metals (Cu, Cr, and Cd) in wastewater with the aim of analyzing the effect of palm oil boiler ash on ... -
Implementasi Photovoltaic Generator (PVG) Berbasis Current Limiter dan Arduino sebagai Microcontroler untuk Kinerja Pompa DC
(Universitas Sumatera Utara, 2024)Current limiter is an electronic circuit that aims to limit the current that can be used to maintain the amount of current that can be passed by a circuit that goes to the load. In conjunction with solar panels as an energy ... -
Isolasi dan Uji Potensi Jamur Endofit Penghasil Enzim Lakase dari Akar Kelapa Sawit (Elaeis guineensis Jacq.)
(Universitas Sumatera Utara, 2024)Endophytic fungi from oil palm (Elaeis guineensis Jacq.) known produce degradative enzymes such as laccase. This study aimed to obtain endophytic fungi produce laccase enzymes isolated from oil palm roots continue by ... -
Distribusi dan Karakteristik Habitat Larva, serta Morfologi Nyamuk Anopheles spp. di Desa Ujung Bandar, Kecamatan Salapian, Kabupaten Langkat, Sumatera Utara
(Universitas Sumatera Utara, 2024)Ujung Bandar Village, Salapian District, Langkat Regency has experienced changes in ecological conditions. These changes were caused by human activities. Increased risk of transmission of malaria transmitted by Anopheles ... -
Analisis Perbandingan Clustering Based dengan Density Based dalam Mendeteksi Outlier
(Universitas Sumatera Utara, 2024)Data is information that is collected and recorded, which can then be processed or analyzed. Data can take the form of numbers, text, images, sound, or other forms that represent facts or characteristics of an object, ... -
Optimalisasi Penyusunan Menu Diet Penderita DM Tipe II dengan Metode Goal Programming (Studi Kasus : RSUD H. Abdul Manan Simatupang Kisaran)
(Universitas Sumatera Utara, 2024)Diabetes is a group of metabolic diseases characterized by hyperglycemia due to the inability of the pancreas to secrete insulin, insulin dysfunction, or both. Diabetes treatment is essential to avoid long-term complications. ... -
Analisis Morfologi, Kristalinitas, dan Rendemen Grafena Berlapis Nano dari Tempurung Kelapa (Cocos nucifera L.)
(Universitas Sumatera Utara, 2023)Research on morphology analysis, crystallinity and yield of Graphene Nano Sheets from coconut shells using the pyrolysis method has been carried out. The use of coconut shell in this research is because it contains 33,61 ... -
Analisis Morfologi, Kristalinitas, dan Rendemen Grafena Berlapis Nano dari Cangkang Kemiri (Aleurites moluccana (L.) Willd)
(Universitas Sumatera Utara, 2023)Penelitian tentang analisis morfologi, kristalinitas dan rendemen Grafena Berlapis Nano (GBN) dari cangkang kemiri dengan metode pirolisis telah dilakukan. Cangkang kemiri memiliki kandungan hemiselulosa 49,22 dan lignin ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Tumbuhan Jeruk Purut (Citrus hystryx D.C)
(Universitas Sumatera Utara, 2024)Isolation and identification of flavonoid compounds from the bark of the kaffir lime plant (Citrus hystrix DC) begins with the maceration extraction stage with methanol solvent. The methanol extract was evaporated and ... -
Sintesis Metil Ester dari Minyak Kelapa Sawit Menggunakan Kat Alis Heterogen Abu Kulit Durian pada Variasi Waktu Reaksi dan Kecepatan Pengadukan Pendispersi Homogen
(Universitas Sumatera Utara, 2023)The synthesis of fatty acid methyl esters has been carried out through the transesterification of palm oil and methanol using durian peel ash as a heterogeneous catalyst. Durian skin powder was oven dried at 600°C for ... -
Pembuatan dan Karakterisasi Beton Enkapsulasi sebagai Thermal Energy Storage pada PEG 6000 dan Magnetite Fe3O4 (50%, 50%) (60%, 40%)
(Universitas Sumatera Utara, 2024)The study showcases the results of testing concrete with Phase Change Material (PCM) using mass variations of PEG 6000 (50%, 60%) and Magnetite Fe3O4 (50%, 40%). This research also uses physical and mechanical tests in the ... -
Penerapan Regresi Linier Berganda dalam Menganalisis Faktor-Faktor yang Mempengaruhi Laju Pertumbuhan Ekonomi di Kabupaten Deli Serdang
(Universitas Sumatera Utara, 2023)Multiple linear regression model to determine the impact of Deli Serdang's economic growth on population, human development index and crime rate. Y = 12,81948−8,824000 X1+23,56364X2−0,108072X3+E. Multiple linear regression ... -
Penerapan Metode Markov Chain dalam Perencanaan Pemeliharaan Mesin untuk Meminimumkan Biaya Perawatan Mesin PTPN V Sei Rokan
(Universitas Sumatera Utara, 2024)PTPN V Sei Rokan is a plantation company that produces palm oil which is processed into CPO (Crude Palm Oil) palm oil and palm kernel. In the production process there are several machines, one of which is the Kempa Station ... -
Analisa Kandungan Logam Berat (As, Cd, Pb dan Hg) pada Jaringan Tubuh Udang di Sungai Batang Toru Kecamatan Batang Toru, Kabupaten Tapanuli Selatan
(Universitas Sumatera Utara, 2023)Batang Toru River is a river that is widely used for agricultural, plantation and industrial needs in the form of gold mining, oil palm plantations, and rubber plantations. As a result of these various activities, river ... -
Keanekaragaman Ikan di Perairan Pulau Poncan Gadang Kabupaten Tapanuli Tengah, Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2024)Research on fish diversity was conducted in the waters of Poncan Gadang Island, Central Tapanuli Regency, North Sumatra in March 2023. The purpose of this study was to analyze fish diversity and its relationship with ... -
Alat Pengering Lidi dengan Kontrol Suhu Otomatis Berbasis Atmega 328 dengan Sumber Catu Daya Solar Cell
(Universitas Sumatera Utara, 2024)Indonesia as one of the countries that is the main producer of oil palm in the world, with many communities around oil palm plantations and plants that utilize waste from oil palm to support the local economy. One form of ... -
Uji Efektivitas Nanoherbal Daun Gagatan Harimau (Vitis gracilis Wall.) terhadap Histologi Pankreas Tikus Wistar (Rattus norvegicus L.) Jantan Model Diabetes Mellitus yang Diinduksi Aloksan
(Universitas Sumatera Utara, 2024)Gagatan harimau leaves (Vitis gracilis Wall.) are a potential anti-diabetic plant due to their secondary metabolites, including flavonoids, phenols, and gagatan harimau leaves contain secondary metabolites, including ... -
Uji Efektivitas Nanoherbal Daun Gagatan Harimau (Vitis gracilis Wall.) terhadap Histologi Ginjal Tikus Wistar (Rattus norvegicus L.) Jantan Model Diabetes Mellitus yang Diinduksi Aloksan
(Universitas Sumatera Utara, 2024)Vitis gracilis (gagatan harimau) contains secondary metabolites, namely flavonoids and terpenoids, which act as antioxidants and trigger improvements in the histological structure of organs with nanometre sizes. These ...