Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1521-1540 of 11354
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Isolasi dan Identifikasi Golongan Senyawa Fenolik dari Kulit Batang Tumbuhan Delima (Punica granatum L.)
(Universitas Sumatera Utara, 2022)The phenolic compound had been isolated from the stem bark of pomegranate (Punica granatum L.). Isolation was carried out by maceration extraction method with methanol and methanol extract was re-extracted with ethyl acetate ... -
Studi Pembuatan Grafena Nano Sheet (GNS) dari Tempurung Kelapa yang direndam dalam Minyak Tanah
(Universitas Sumatera Utara, 2022)Research has been done on the manufacture of graphene nano sheet (GNS) from coconut shell that soaked in kerosine. Coconut shell are converted to graphene through the carbonization process. Graphene is a carbon in the form ... -
Pengaruh Perbandingan Konsentrasi Zat Aditif Tio2/Zno terhadap Karakterisasi Bioplastik Karaginan Kappa-Cmc-Gliserol
(Universitas Sumatera Utara, 2022)Carrageenan kappa-CMC-glycerol bioplastic manufacture and carrageenan kappa-CMC-glycerol with the addition of TiO2/ZnO had been done. Carrageenan kappa-CMC-glycerol based bioplastic using blending method. The bioplastic ... -
Modifikasi Pati Sukun (Artocarpus altilis) menjadi Nanopartikel Pati Fosfat dengan Metode Ikat Silang Menggunakan Natrium Heksametafosfat
(Universitas Sumatera Utara, 2022)The production of phosphate nanoparticles starch was carried out through a cross-linking reaction between breadfruit starch nanoparticles (Artocarpus altilis) and sodium hexametaphosphate (SHMP). This research was carried ... -
Karakteristik Beton Polimer Berbasis Pasir, Serbuk Cangkang Kerang, dan Serat Kulit Durian dengan Pengikat Resin Epoksi
(Universitas Sumatera Utara, 2022)Research had been carried out on polymer concrete from a mixture of sand, shell powder, durian skin fiber, and epoxy resin. This study aimed to determine the effect of the addition of epoxy resin on the physical properties ... -
Pengaruh Variasi Reduced Grafena Oxida (rGO) terhadap Sifat Listrik Membran Polimer Elektrolit Berbasis Kitosan/Zeolit Alam Pahae/Reduced Grafena Oxida (rGO)
(Universitas Sumatera Utara, 2022)Chitosan/zeolite/rGO (Cs/Z/rGO) membranes have been prepared with five variations of membrane samples, namely Cs/z, Cs/z/rGO (0.5% w/w), Cs/z/rGO (1.0 % w/w), Cs/z/rGO (1.5% w/w), and Cs/z/rGO (2.0% w/w) using the solution ... -
Rancang Bangun Alat Ukur Pergeseran Tanah (Extensometer) Berbasis Sensor Ultrasonik Menggunakan Media Transmisi Serat Optik
(Universitas Sumatera Utara, 2022)One of the serious disasters that often occurs in Indonesia is landslides. Currently the occurrence of landslides can be predicted by looking at the displacement of the soil from several measuring instruments that can ... -
Rancang Bangun Sistem Pengatur Suhuadan tingkatakekeruhan Airapada Budidaya Ikan Hias Menggunakanamikrokontroler ATMEGA 8535
(Universitas Sumatera Utara, 2022)Freshwater ornamental fish farming provides many opportunities for the community because there are many enthusiasts and was one of the interesting hobbies. Butifor the success of such cultivation requires special attention ... -
“Metode Goal Programming untuk Optimasi Produksi Furnitur di Home Industri Bayu Springbed Kabupaten Deli Serdang
(Universitas Sumatera Utara, 2022)Production planning is generally done with estimates based on past forecasting. However, in fact, companies are often faced with demand because the volume of demand depends on customer demand. The purpose of this study ... -
Analisis Efektivitas Penyelesaian Masalah Transportasi Fuzzy dengan Menggunakan Metode Improved Exponential Approach
(Universitas Sumatera Utara, 2022)Transportation is an activity that affects the smooth wheels of the economy. The core problem of transportation is to minimize distribution costs. Parameters that affect distribution costs in the form of demand, supply ... -
Pemanfaatan Acetobacter xylinum Untuk Pembuatan Material Selulosa Bakteri Kitosan dari Maltosa dibandingkan Sukrosa Menggunakan Medium Air Kelapa
(Universitas Sumatera Utara, 2008)One of important coconut water application is for preparation of nata de coco or bacterial cellulose. The resulting bacterial cellulose in fact can be used in medical application as temporary substitute for skin or wound ... -
Peranan Enzim Lipase dari Ekstrak Kecambah Biji Sawit Pada Proses Gliserolisis Minyak Kelapa dan RBD Stearin
(Universitas Sumatera Utara, 2007)Enzymatic glycerolysis reaction performed for stearin and coconut oil by using lipase from extract of germinating of palm seeds as biocatalyst. Although enzymatic process has several advantages compared to chemical processes ... -
Pemanfaatan Limbah Kulit Kopi Sebagai Bahan Pembuat Asap Cair dan Aplikasinya sebagai Anti Mikrobia pada Ikan Lele Dumbo (Clarias gariepius)
(Universitas Sumatera Utara, 2013)Coffee bean skin waste is an agricultural waste product that has the potential to be processed into liquid smoke and can be applied to smoke the African catfish (Clarias gariepinus). Pyrolysis liquid smoke, determined ... -
Kontribusi Epifit Terhadap Kelimpahan Serangga Kanopi Pada Perkebunan Kelapa Sawit di Sumatera Utara
(Universitas Sumatera Utara, 2016)Vascular epiphytes was a member of the community of oil palm plantations which have received less attention. These herbs also improve biodiversity in oil palm plantations, in addition it also provides habitat and food ... -
Isolasi dan Penentuan Struktur Kimia Senyawa Flavonoid dari Daun Iler (Coleus atropurpureus Benth)
(Universitas Sumatera Utara, 2012)Iler ( Coleus atropurpureus Benth) is a species of the family Lamiaceae which is used as a traditional medicine to treat fever, ulcer wound and diabetes mellitus. This plant is known to contain flavonoid. This study aimed ... -
Analisis Dinamika Atmosfer dan Lautan Terhadap Pola Cuaca dan Iklim di Sumatera Utara
(Universitas Sumatera Utara, 2010)Based on topographic conditions in North Sumatra in the top five areas include: East Coast, East Slope, Mountains, West Slope and West Coast. The data used are monthly rainfall data of 12 rain posts in North Sumatra, ... -
Studi Karakteristik Kimiawi Air Sungai Tamiang dan Pengolahannya dengan Zeolit-Polyalumunium Clorida (PAC) Sebagai Sumber Air Bersih
(Universitas Sumatera Utara, 2010)River water stream often used as garbage storage from industrial and household. These activity causes chemicals contained in water increase and make Total Disvolved Solid (TDS), iron (Fe) and ammonia higher than cleaned ... -
Distribusi Altitudinal Suku Arecaeae di Kawasan Hutang Gunung Sinabung Kabupaten Karo Sumatera Utara
(Universitas Sumatera Utara, 2008)A study on Distribution altitudinal Arecaceae in Mount Sinabung forest were conducted in January to Maret 2008. Sampling area was settled by using porpusive sampling method, and divided to six location based on their ... -
Kestabilan Thermal Nanokomposit Polipropilena dengan Penguat Montmorilonites dan Antioksidan Irganox 1010
(Universitas Sumatera Utara, 2010)Nanocomposite polymers has attracted great attention world wide both in academic and industry. The improvement material properties of polymers can be done by using layered silicates with a low concentration. This research ... -
Studi Karakteristik dan Aplikasi Film Pelapis Kelat Logam Alkali Tanah Alginat-Kitosan
(Universitas Sumatera Utara, 2007)Several types of thin films are widely used to protect foodstuff, but thin film with antimicrobial activity and edible film characteristic is still limited to develop. In this work has been performed the preparation of ...