Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1421-1440 of 11350
-
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Tumbuhan Harendong Bulu (Clidemia Hirta (L.) D. Don.)
(Universitas Sumatera Utara, 2023)Isolation and identification of flavonoid compound group of harendong bulu plant leaves (Clidemia hitra (L) D. Don.) had been done by maceration extraction using methanol solvent. Methanol fraction was evaporated was ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Tumbuhan Antahasi (Weinmannia Blumei Planch)
(Universitas Sumatera Utara, 2023)The flavonoid compound had been isolated from the bark of antahasi (Weinmannia blumei Planch). Isolation was carried out by maceration extraction method with methanol and methanol extract was re-extracted with ethyl acetate ... -
Modifikasi Galaktomanan Biji Aren (Arenga Pinnata Merr.) Menjadi Galaktomanan Stearat Melalui Transesterifikasi Menggunakan Katalis NaHCO3 dengan Radiasi Mikrowave
(Universitas Sumatera Utara, 2023)Galactomannan stearat was modified by transesterification of galactomannan from sugar palm (Arenga pinnata Merr.) seeds with methyl stearat using NaHCO3 catalyst under microwave irradiation at 50 P for 15 minutes. Galactomannan ... -
Modifikasi Pati Sukun Nanopartikel Terpropilasi Melalui Reaksi Esterifikasi Menggunakan Propionat Anhidrida
(Universitas Sumatera Utara, 2023)Propionate starch nanoparticles were obtained through an esterification reaction between nanoparticle breadfruit starch and propionate anhydride. This research was conducted in three stages, namely isolation of breadfruit ... -
Bahan Penyerap Gelombang Elektromagnetik Berbasis Bi2-xLaxFe4O9
(Universitas Sumatera Utara, 2018)Has done research on the magnetic based materials as electromagnetic wave absorber material. Bi2-xLaxFe4O9 materials is synthesized by solid state reaction method by mechanical milling technic. The materials are milled ... -
Sintesis Dodekil β-Hidroksi Pelargonamida Melalui Reaksi Amidasi Dodekilamina dengan Asam β-Hidroksi Pelargonat yang Diturunkan dari Asam Risinoleat
(Universitas Sumatera Utara, 2000)Ricinoleic acid that was be be obtained from hydrolysis castor oil can be oxidized by KMnO4 in base and acid condition to produced β-hydroxy pelargonic acid. The esterification of β-hydroxy pelargonic acid that still ... -
Lemak Margarin dari Hasil Suspensi Stearin Kelapa Sawit dengan Gliserolat Minyak Kacang Kedelai yang diperkaya Omega-3 (n-3) Etil Ester Asam Lemak Sardencis
(Universitas Sumatera Utara, 1998)Fatty acid of omega-3 especially docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) have an important role in health, therefore it is necessary to include them in the diet. DHA and EPA are found in fish oil, ... -
Komposit Poliuretan-Serbuk Sekam Padi Sebagai Material Isloator Panas
(Universitas Sumatera Utara, 2016)Preparation of polyurethane composite with rice husk filler as heat insulation material has been done. Polyurethanes are used is a synthesis of polypropylene glycol as a source of polyols and toluene diisocyanate as ... -
Pembuatan Batako dengan Menggunakan Lembah Abu Terbang Industri Oleokimia sebagai Bahan Pengganti Semen dengan Campuran Gypsum
(Universitas Sumatera Utara, 2015)The fly ash from oleochemical industry waste in Medan has been evaluated for producing brick. The fly ash was used to replace the use of cement in the brick after mixing with gypsum. Firstly, the characteristic of the ... -
Analisis Cannabinoid dari Rambut Pengguna Narkotika Jenis Ganja (Cannabis sativa L.) Menggunakan Teknik GCMS
(Universitas Sumatera Utara, 2016)Analysis of cannabinoids in hair of marijuana (Cannabis saliva L) can be done using samples of urine, blood and hair. This study used hair because the inspection can be performed after 72 hours of use by the user, this ... -
Kajian Pemanfaatan Tumbuhan Obat Oleh Masyrakat Melayu di Kecamatan Tanjung Tiram Kabupaten Batubara
(Universitas Sumatera Utara, 2010)The research about the application of medical plant has been done in Malay society in Kecamatan Tanjung Tiram Kabupaten Batubara. This research uses both quantitative and qualitative methods in taking the data by using ... -
Studi Analisis Simulasi Tentang Korelasi Temperatur dan Lama Pembakaran Terhadap Kekuatan Impak dan Kekerasan Suatu Produk Keramik dengan Komposisi Tertentu dan Pada Tekanan Tetap
(Universitas Sumatera Utara, 2007)The manufacturing of a ceramic in composition of raw materials : 30% Ballclay, 20% Feldspar, 30% Kaolin and 20% Quartz has been made. The samples of ceramic are moulded in the forms of block in size of ( 1 x 1 x 15 ) cm3 ... -
Studi Analisis Simulasi Tentang Korelasi Suhu Sintering dan Waktu Pembakaran Terhadap Sifat Mekanis Keramik PSZ dengan Aditif MgO
(Universitas Sumatera Utara, 2006)Partially Stabilized Zirconia (PSZ) is a toughness ceramic so that can be used by toll cutting and bio ceramic. Have been done by ceramic making of PSZ ,Yith additive 12% mole MgO. Ceramic which have been printed by ... -
Studi Tentang Korelasi Temperatur Sintering Terhadap Sifat Fisis pada Waktu Pembakaran Tetap pada Keramik Porselen Alumina Secara Simulasi
(Universitas Sumatera Utara, 2006)Research about influent of Alumina composition has been done for making of ceramic of alumina porcelain. The applied raw material were Feldspar, Clay and Quartz, with addition alumina was varied from 0%, 5%, 10%, 15%, ... -
Pengaruh Campuran Senyawa Boron Untuk Mengurangi Sifat Kegetasan
(Universitas Sumatera Utara, 2015)It had been the manufacture of ceramics for construction materials with Clay, feldsfar, Kaolin and Quartz and Boron Compounds binder material. The based materials Variations composition are: 95,96,97,98,99, 100% (in mass%) ... -
Kinerja Elektroda Aluminium/Grafena Berlapis Nano, NH4Cl-MnO2 dan Grafena Berlapis Nano pada Berbagai Variasi Rasio Berat Sebagai Elektroda Baterai Primer
(Universitas Sumatera Utara, 2022)Research on the performance of Aluminum (Al)/Graphene Nano Sheets (GNS), NH4Cl-MnO2 and GNS on Weight Ratio Variations for primary Battery Electrodes has been carried out. GNS was produced from coconut fruit using the ... -
Penerapan Rantai Markov dalam Memprediksi Jumlah Produksi Kelapa Sawit dan Luas Lahan Panen di Enam Kabupaten Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2022)The Markov Chain is a method that can be used to determine or predict future opportunities that serves to help decision making, where the conditional chances of future events depend only on present events not on past events. ... -
Penerapan Metode Forward dan Backward untuk Menentukan Faktor yang Mempengaruhi Angka harapan hidup di Kabupaten Tapanuli Selatan
(Universitas Sumatera Utara, 2022)Life expectancy is an indicator used to assess health status. To increase life expectancy, of course, cannot be separated from various factors. To find out what factors significantly affect life expectancy, the authors use ... -
Analisis Faktor-Faktor yang Berpengaruh terhadap Tingkat Kemiskinan Penduduk Kota Medan Berdasarkan Data Tahun 2002-2021
(Universitas Sumatera Utara, 2022)Path analysis is an overview of multiple regression statistical studies that are applied to examine the direct or indirect relationship of different variables. In this study, path analysis is applied to the poverty problem ... -
Pembuatan Metil Selulosa Dari Selulosa Batang Jerami Padi (Oriza Sativa.L) dengan Dimetil Sulfat Melalui Reaksi Eterifikasi Pada Variasi Jenis Basa
(Universitas Sumatera Utara, 2022)Methyl cellulose was made by etherification reaction between α-cellulose isolated from rice straw (Oriza Sativa.L) and dimethyl sulfate. Isolation of α-cellulose was carried out in the pre-hydrolysis stage using 3.5% HNO3 ...