Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1261-1280 of 11345
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Interaksi dengan Diagram dalam Geometri untuk Pembentukan Konjektur Bernalar (Reasoned Conjectur)
(Universitas Sumatera Utara, 2010)Perkembangan Ilmu Pengetahuan, Teknologi dan Sain (IPTEKS) telah membawa perubahan yang sangat cepat terutama dalam bidang telekomunikasi dan informasi. Untuk tampil unggul pada keadaan yang selalu berubah clan kompetitif ... -
Karakterisasi Protein Konsentrat Hasil Ekstraksi dari Bungkil Inti Sawit dengan Metode Hidrolisis
(Universitas Sumatera Utara, 2010)Research on the characterization of protein concentrate extracted from palm kernel cake has been conducted. This research was carried out using different solutions with the lipid binding protein and polysaccharides with ... -
Keanekaragaman Plankton serta Hubungannya dengan Kualitas Air di Perairan Danau Toba Balige Kabupaten Toba Samosir
(Universitas Sumatera Utara, 2009)The research about "The Diversity of Plankton and its Correlation to the Quality Water of Lake Toba, Balige, has been done in October 2008 to January 2009. Samples were taken from four observation Stations and in every ... -
Studi Pemanfaatan Tanah Diatomea Aktif sebagai Adsorben terhadap Senyawa Nitrogen yang terdapat dalam Air Danau Toba
(Universitas Sumatera Utara, 2009)A study on the use of activated diatomae as the adsorbent for nitrogen compounds in the water of Toba Lake has been carried out. The water sample was taken randomly from the beach around of Toba Beach Hotel, Pangambata ... -
Studi tentang Kesensitifan Spektrofotometer Serapan Atom (SSA) Teknik Vapour Hydride Generation Accessories (VGHA) dibandingkan dengan SSA Nyala pada Analisa Unsur Arsen (As) yang terdapat dalam Air Minum
(Universitas Sumatera Utara, 2009)Vapour hydride generation accessories (VHGA) is equipment that is combine to atomic absorption spectroscopy(AAS) in analysis metal so that the instrument can achieve sensitivity to μg/L (ppb). The Investigation of AAS ... -
Komputasi Berbasis Matlab untuk Analisis Pengaruh Aditif SiO2 dan Suhu Sintering terhadap Karakteristik Keramik MagnetBaO.6Fe2O3
(Universitas Sumatera Utara, 2008)Production of Ba0.6Fe203 magnet ceramic made of Fe203 and BaC03 with an additive of Si02 has been much used as the component for electric motor, water meter and so forth. The relationship between the charactheristics of ... -
Invers Matriks untuk Matriks Jarang Berskala Besar
(Universitas Sumatera Utara, 2007) In the most real life applications, linear equation systems having large dimension of matrix coefficient tend to be sparse, a matrix with the proportion of more zero elements, an alternative way to solve the linier ... -
Reaksi Aminasi Glukosa dengan Gas NH3 Bertekanan Menggunakan Katalis Nikel
(Universitas Sumatera Utara, 2007)An amination reaction on glucose using nickel as a catalyst heterogen has been done in autoclave. Into the autoclave glucose (5 g, 0,0277 mol) was suspended in hexane as well Nickel powder. Ammonia 150 psi and hydrogen ... -
Model Optimisasi Terintegrasi untuk Memprediksi Kualitas Air Sungai
(Universitas Sumatera Utara, 2016)This study examine the development of integrated models to predict the water quality of the river. Water quality is determined by the concentration of pollutants in the water flow. The model was developed by taking into ... -
Gambaran Endoparasit Sapi (Bos Sp.) yang Dipelihara Secara Ekstensif di Kebun Kelapa Sawit, Kecamatan Tebing Tinggi, Sumatera Utara
(Universitas Sumatera Utara, 2023)Research on the description of The cattle endoparasites extensively reared at oil palm plantations, Tebing Tinggi District North Sumatra had been done. This research was conducted from January to April 2023. This study ... -
Analisis Kariotipe Kromosom Ikan Guppy (Poecilia reticulata Peters, 1859) Dengan Pewarnaan Giemsa
(Universitas Sumatera Utara, 2023)Guppy fish (Poecilia reticulata) is one type of freshwater ornamental fish belong to the family Poeciliidae. Guppies are ornamental fish with in great demand of the interesting color variations such as red, blue, yellow ... -
Analisis Kandungan Logam Berat Pb dan Zn pada Daging Ikan Kakap Putih (Lates Calcarifer) di Perairan Sungai Belawan
(Universitas Sumatera Utara, 2023)The research of Pb and Zn heavy metal content of White Snapper meat (Lates calcarifer) was conducted in Belawan River, Deli Serdang Regency on January 2023. The purpose of this study was to analyse the levels of heavy ... -
Analisis Kariotipe Kromosom Ikan Balon Sailfin Molly (Poecilia latipinna Lesueur, 1821)
(Universitas Sumatera Utara, 2023)Research on sailfin molly fish has never been done, so information on the karyotype, pattern, shape, and size of the chromosomes of sailfin molly has not been found. This study was conducted to determine the number of ... -
Kelimpahan, Pola Distribusi dan Pola Pertumbuhan Kepah Tahu (Meretrix Meretrix) di Perairan Pantai Sialang Buah, Kabupaten Serdang Bedagai, Sumatera Utara
(Universitas Sumatera Utara, 2023)Tofu clam (M. meretrix) is a soft-bodied animal (mollusca) that belongs to the bivalves or pelecypoda class. Tofu clam contains protein, fat, carbohydrates, EPA (Eicosapentaenoic Acid) and DHA (Docosahexaenoic Acid). ... -
Variasi Konsentrasi Ekstrak Taoge dan Media Tanam terhadap Pertumbuhan Microgreen Alfalfa (Medicago Sativa L.)
(Universitas Sumatera Utara, 2023)Microgreens are a young vegetables with small size harvested around 7 to 14 days after sowing. Microgreen require suitable growing media as well as nutrients to grow properly. The research on the variation of concentrations ... -
Analisis Kariotipe Kromosom Ikan Hias Ekor Pedang (Xiphophorus hellerii Heckel, 1848)
(Universitas Sumatera Utara, 2023)The genetic aspect of the swordtail fish (Xiphophorus hellerii), a member of the Poeciliidae family, rarely to known. The fish has a very high market value and can be produced as an attractive fish farming product. ... -
Analisis Metode Branch and Cut dan Branch and Bound untuk Menyelesaikan Masalah Mixed Integer Linier Programming
(Universitas Sumatera Utara, 2022)Mixed integer linear programming is a combinatorial optimization problem that is difficult to solve efficiently. One method that can be used to solve mixed integer linear programming problems is the branch and bound ... -
Pembuatan Phase Change Material dengan Paraffin Wax dan Penambahan 20%, 30% Magnetite (Fe3o4) pada Beton Enkapsulasi sebagai Thermal Energy Storage
(Universitas Sumatera Utara, 2023)Research has been conducted on Phase Change Material with Paraffin Wax and Fe3O4 on encapsulated concrete as Thermal Energy Storage. This research is motivated by renewable technology, namely Thermal Energy Storage ... -
Pembuatan Phase Change Material dengan (50%, 60%) Paraffin Wax-Magnetite (50%, 40% Fe3o4) pada Beton Enkapsulasi Sebagai Thermal Energy Storage
(Universitas Sumatera Utara, 2023)Research has been done on Phase Change Material (PCM) with Parrafin Wax (PW) and Magnetite (Fe3O4) composited using 80℃ for 10 minutes with sonication variations in mass composition of PW50%Fe3O450% and PW60%Fe3O440% ... -
Pertumbuhan Tanaman Kangkung Darat (Ipomea Reptans Poir. ) dengan Nutrisi Pupuk Organik Cair Kulit Nanas (Ananas Comosus) pada Sistem Hidroponik Wick
(Universitas Sumatera Utara, 2023)Kangkong (Ipomea reptans Poir.) is a type of vegetable that is favored by all groups of people in Indonesia. This study aims to analyze the growth response of kangkong by giving pineapple peel POC nutrition with different ...