Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 881-900 of 11354
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Pembuatan Metil Ester Asam Lemak dari Larva Lalat Tentara Hitam (Black Soldier Fly) melalui Reaksi in Situ Transesterifikasi Menggunakan Peralatan Penghancur Terkontrol
(Universitas Sumatera Utara, 2023)Production of fatty acid methyl esters / biodiesel from black soldier fly larvae has been explopred through in-situ transesterification reaction BSF larvae on parameters catalysts concentration, reaction time, ratio of BSF ... -
Pembuatan Setil Palmitat dari Reaksi Esterifikasi Setil Alkohol dan Asam Palmitat Menggunakan Katalis Enzim Lipase dan Radiasi Mikrowave
(Universitas Sumatera Utara, 2023)Preparation of cetyl palmitate from palmitic acid and cetyl alcohol esterification with commercial lipase enzyme catalyst and reacting it with microwaves has been carried out. The parameters used in this study are the ... -
Karakterisasi Termal dari Modifikasi Aspal dengan Limbah Plastik Polietilena Grafting Maleat Anhidrat dan Inisiator Dikumil Peroksida
(Universitas Sumatera Utara, 2023)Research on the thermal characteristics of asphalt modification with polyethylene (PE) plastic waste grafted with maleic anhydrous and dicumyl peroxide initiator. This research uses 3 stages, the first stage, the used ... -
Sintesis Isopropil Palmitat dari Esterifikasi Isopropil Alkohol dan Asam Palmitat pada Perbandingan Waktu Reaksi dan Kekuatan Mikrowave Menggunakan Katalis Enzim Lipase
(Universitas Sumatera Utara, 2023)Synthesis of isopropyl palmitate from the esterification of isopropyl alcohol and palmitic acid using a lipase enzyme catalyst has been performed using microwave radiation. The parameters studied in this study were the ... -
Pembuatan Isopropil Palmitat dari Esterifikasi Isopropil Alkohol dan Asam Palmitat pada Perbandingan Rasio Molar dan Berat Enzim Lipase Menggunakan Kekuatan Mikrowave
(Universitas Sumatera Utara, 2023)The preparation of isopropyl palmitate (!PP) from palmitic acid and isopropyl alcohol through an esterification reaction under microwave irradiation and catalyzed by enzyme lipase has been studied. The parameters in this ... -
Isolasi dan Identifikasi Golongan Senyawa Fenolik serta Uji Aktivitas Antibakteri dari Kulit Batang Tumbuhan Pucuk Merah (Syzygium myrtifolium Walp.)
(Universitas Sumatera Utara, 2023)The phenolic compound had been isolated from the stem bark of Pucuk Merah (Syzygium myrtifolium Walp. Isolation was carried out by maceration extraction method with methanol and methanol extract was re-extracted with ethyl ... -
Sintesis dan Karakterisasi Karboksimetil Kitosan dengan Nanogold dalam Sediaan Moisture Gel sebagai Whitening Agent
(Universitas Sumatera Utara, 2023)The development of cosmetics from time to time has made significant advances, especially in the preparation of moisture in gel form. Moisture gel is a semisolid system consisting of a suspension made up of small organic ... -
Karakterisasi Paduan EPDM/NR SIR-20 dengan Pengisi Serbuk Cangkang Kerang Darah (Anadara granosa) sebagai Peredam Benturan Pintu Kendaraan (Weather Strip)
(Universitas Sumatera Utara, 2023)Research on composites from the EPDMINR SJR-20 alloy with the addition of blood cockle shell powder as a filler material which is applied as a vehicle door impact absorber (weather strip). Making weather strips is done ... -
Karakterisasi Paduan EPDM /NR dengan Pengisi Serbuk Cangkang Telur Bebek sebagai Peredam Benturan Pintu Kendaraan Roda Empat
(Universitas Sumatera Utara, 2023)The Composite of Ethylene Propylene Diene Monomer alloy with Natural Rubber (EPDM I NR) which is then added duck egg shell powder as a filler material which is applied as a four-wheeled vehicle door impact absorber. The ... -
Keterhubungan Graf dengan Aljabar Matriks
(Universitas Sumatera Utara, 2023)Let G be a graph consisting of n vertices and m edges, a graph G is said to be connected if G contains exactly one connected component, and is said to be disconnected otherwise. A simple graph G can be represented as an ... -
Metode Linierisasi untuk Regresi Kuadrat Terkecil Parsial
(Universitas Sumatera Utara, 2016)This research investigates Romeras local linearization approach as a variance pre- diction method in partial least squares (PLS) regression. By addressing limita- tions in the original PLS regression formula, the local ... -
Kepadatan, Morfometrik dan Pola Distribusi Udang Mantis (Harpiosquilla raphidea) di Perairan Estuari Suaka Margasatwa Karang Gading Kabupaten Deli Serdang
(Universitas Sumatera Utara, 2023)Mantis shrimp (Harpiosquilla raphidea), one of economically important commodity in Karang Gading, Deli Serdang, had a risk of population decline due to uncontrolled fishing. The research was conducted to analyze population ... -
Penentuan Rute Terpendek Pendistribusian Pupuk Menggunakan Algoritma Dijkstra
(Universitas Sumatera Utara, 2021)Finding the shortest route in one of the problems faced by PT. Soeloeng Laoet Inc, at Sinah Kasih in distributing fertilizers to the fertilizers location. The location of fertilizers blocks that the are scattered in ... -
Ekstraksi Etanol pada Cairan Lambung Mencit Jantan Putih (Mus-musculus) dengan Metode Headspace - Single Drop Microekstraction (HS-SDME) dan Analisis Menggunakan Gas Chromatography (GC)
(Universitas Sumatera Utara, 2023)Ethanol is one of the compounds found in the composition of liquor or the like, with the chemical formula C:H&O. This substance is contained in several types of alcohol, which are produced naturally and industrially using ... -
Keanekaragaman Genetik Durian (Durio zibethinus Murr.) dari Kota Padangsidimpuan Berdasarkan Morfologi dan Simple Sequence Repeats (SSR)
(Universitas Sumatera Utara, 2023)The research of the the genetic diversity of durian from Padangsidimpuan had been carried out based on the morphology and the SSR (Simple Sequence Repeats) method. Ten durians were taken at random from people's plantations ... -
Pengaruh Variasi Massa Stronsium Oksida Diimpregnasi pada Mesopori Silika sebagai Katalis Reaksi Transesterifikasi Minyak Jarak
(Universitas Sumatera Utara, 2023)Research has been carried out regarding the impregnation of SrO on mesoporous sifica synthesized using templating anionic surfactants. Impregnation was carried out by varying the mass of Sro on mesoporous silica, ... -
Pengaruh NaOH dan Katalis Coal Fly Ash dalam Proses Perengkahan Katalitik Minyak Sawit Mentah (CPO) Menjadi Bahan Bakar Hidrokarbon
(Universitas Sumatera Utara, 2023)Fossil oil reserves are decreasing due to the increase in population and the non- renewable nature of fossil oil, so it is necessary to develop alternative fuels that are environmentally friendly to replace petroleum (fossil ... -
Pembuatan Metil Ester Asam Lemak dari Minyak Biji Teh (Camellia sinensis L.) melalui Reaksi Trans-Esterifikasi dan Pengujian Karakteristik Biodiesel
(Universitas Sumatera Utara, 2023)The production of fatty acid methyl esters (FAME) from tea seed oil (Camellia sinensis L.) through the transesterification reaction has been successfully carried out. Tea seed oil extraction was carried out using n-Hexane ... -
Efektivitas Tumbuhan Acorus calamus, Pistia stratiotes, dan Azolla pinnata sebagai Kandidat Agen Fitoremediasi Penyerapan Tembaga (Cu)
(Universitas Sumatera Utara, 2023)Metals are dangerous pollutants because they cannot be degraded in living bodies. Excessive amounts of metal can turn toxic. The purpose of this study was to determine the effectiveness of the Acorus calamus, Pistia ... -
Karakterisasi Kekeringan Meteorologis dengan Metode Standardized Precipitation Index dan Standardized Precipitation Evapotranspiration Index di Sumatera Utara
(Universitas Sumatera Utara, 2023)A drought index is utilized to identify and illustrate the level of drought in a region, the method used in this research is the Standardized Precipitation Index and Standardized Precipitation Evapotranspiration Index ...