Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1321-1340 of 11345
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Pengaruh Variasi Konsentrasi Hcl Terhadap Pemurnian Nanosilikon dari Pasir Kuarsa
(Universitas Sumatera Utara, 2023)Synthesis of nanosilicon has been carried out magnesiothermically with the addition of NaCl salt and various concentrations of hydrochloric acid (HCl) in the nanosilicon purification step. Silica was extracted from ... -
Isolasi dan Identifikasi Golongan Senyawa Fenolik dari Daun Tumbuhan Babanjaran (Clibadium surinamense L.)
(Universitas Sumatera Utara, 2023)Isolasi dan Identifikasi Golongan Senyawa Fenolik telah dilakukan dari daun tumbuhan babanjaran (Clibadium surinamense L.). Daun tumbuhan babanjaran sebanyak 2200 g diekstraksi maserasi dengan metanol dan ekstrak pekat ... -
Pengaruh Variasi Massa Mgo Yang di Impregnasi pada Material Mesopori Silika Serta Aplikasinya Sebagai Katalis dalam Transesterifikasi Minyak Jarak
(2023)Research has been carried out on the effect of mass variation of impregnated MgO on mesoporous silica material and its use as a catalyst in the transesterification of castor oil. The impregnation was performed by varying ... -
Pengaruh Variasi Massa Kalsium Nitrat Sebagai Sumber Kalsium Oksida Terhadap Impregnasi Mesopori Silika dan Aplikasinya Sebagai Katalis Transesterifikasi Minyak Jarak
(Universitas Sumatera Utara, 2023)The effect of mass variation of Ca(NO3)2as a source of CaO on the impregnation of mesoporous silica and its use as a catalyst in the transesterification of castor oil has been studied. Impregnation of mesoporous silica ... -
Sintesis Kardanil Metil Eter melalui Reaksi Eterifikasi Kardanol Hasil Isolasi Kulit Biji Jambu Mete (Anacardium occidentale L.) dengan Metil Iodida pada Variasi Waktu
(Universitas Sumatera Utara, 2023)Synthesis of cardanyl methyl ether was carried out through an etherification reaction between cardanol isolated from the shell of cashew nuts (Anacardium occidentale L.) and methyl iodide. Cardanol isolation was carried ... -
Analisis Sianida pada Sediaan Minuman Siap Saji dengan Penambahan Sianida Secara Laboratory Investigation
(Universitas Sumatera Utara, 2023)Many deaths are caused by cyanide, so a simple analytical method is needed to determine the presence of cyanide in a sample. Incorrect handling and analysis can cause its validity to have weaknesses. Laboratory ... -
Sintesis Kardanil Metil Eter Melalui Reaksi Eterifikasi Kardanol Hasil Isolasi Kulit Biji Jambu Mete (Anacardium Occidentale L.) dengan Variasi Molar Metil Iodida
(Universitas Sumatera Utara, 2023)Synthesis of cardanyl methyl ether was carried out through an etherification reaction between cardanol isolated from cashew seed shell extract (CNSL) and methyl iodide. Cardanol isolation was carried out by adding ... -
Karakterisasi Sifat Mekanik, Morfologi dan Termal Polivinil Klorida Termodifikasi Metil Metakrilat dengan Bahan Pengisi Abu Sekam Padi
(Universitas Sumatera Utara, 2023)Efforts to increase the heat resistance of materials that are often used in electronic devices such as Polyvinyl Chloride (PVC) resin are needed to avoid PVC from decomposing when burned. Materials such as rice husk ... -
Gambaran Histologi Ginjal Mencit (Mus musculus L.) Jantan yang Diberi Limbah Degumming Kokon Ulat Sutera (Bombyx mori L.) yang Telah Dipapar Allethrin
(Universitas Sumatera Utara, 2023)Serisin is one of the proteins contained in silkworm cocoon degumming which functions as an antioxidant. The study aimed to analysed the effect of degumming waste of silkworm cocoons (Bombyx mori L.) on the morphological ... -
Sulfasi Miristil Alkohol Dengan Menggunakan Kompleks SO3-DMF pada Variasi Waktu Sulfasi
(Universitas Sumatera Utara, 2023)Sulfation of myristyl alcohol using the SO3-DMF complex where SO3 is produced from the reaction of P4O10 and H2SO4 and also using DMF. Myristyl alcohol sulfation with the SO3-DMF complex was carried out by mixing 0.05 mol ... -
Pemanfaatan Kulit Pisang Kepok Kuning (Musa Paradisiaca Var.Bluggoe) sebagai Pupuk Organik Cair Terhadap Pertumbuhan Sawi Pagoda (Brassica Rapa Var.Narinosa L.)
(Universitas Sumatera Utara, 2023)This study aims to determine the effect of liquid organic fertilizer (POC) from yellow kepok banana peels on the growth of mustard greens. Liquid organic fertilizer was obtained by fermenting yellow kepok banana peels using ... -
Efek Ekstrak Daun Afrika (Vernonia Amygdalina Del.) Terhadap Penyembuhan Pruritus Mencit (Mus Musculus L.) Model Diabetes
(Universitas Sumatera Utara, 2023)Pruritus or itching is often experienced by people with diabetes mellitus due to poor blood circulation, causing the skin to become dry and itchy. The purpose of this study was to determine the effect of african leaf ... -
Isolasi dan Identifikasi Golongan Senyawa Fenolik dari Kulit Batang Saninten (Castanopsis Argentea (Blume.) A.Dc.)
(Universitas Sumatera Utara, 2023)Isolasi dan identifikasi golongan senyawa fenolik yang terkandung dalam kulit batang saninten (Castanopsis argentea (Blume.) A.DC.) telah dilakukan dengan ekstraksi maserasi menggunakan pelarut metanol. Ekstrak pekat metanol ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Tumbuhan Rumput Knop (Hyptis Capitata Jacq.)
(Universitas Sumatera Utara, 2023)Flavonoid compounds have been isolated from the leaves of Knop grass (Hyptis capitata Jacq.). Isolation was carried out by maceration extraction method with methanol solvent and the methanol extract was extracted again ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Tumbuhan Kenitu (Chrysophyllum Cainito L)
(Universitas Sumatera Utara, 2023)The flavonoid compound has been isolated from the leaves of Kenitu (Chrysophyllum cainito L.). Isolation was carried out by maceration extraction method with methanol solvent and the methanol extract was re-extracted with ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida serta Uji Aktivitas Antibakteri dari Kulit Batang Tumbuhan Kanyere Badak (Bridelia Glauca Blume) (Phyllanthaceae)
(Universitas Sumatera Utara, 2023)Flavonoid compound from the stem bark of the Kanyere Badak plant (Bridelia glauca Blume) had been isolated. 2500 g of Kanyere Badak plant stem bark were macerated by methanol, and the methanol extract dissolved in distiled ... -
Sulfasi Alkohol Lemak Menggunakan Kompleks SO3-DMF pada Variasi Perbandingan Rantai Karbon
(Universitas Sumatera Utara, 2023)Sulfation of fatty alcohols using SO3-DMF complexes at various carbon chain ratios has been carried out. In the first stage, the SO3-DMF complex was prepared by reacting SO3 gas into DMF at a temperature of 0-4 0C with a ... -
Prototipe Pengusir Hama Burung pada Tanaman Padi Menggunakan Sensor Hc-Sr04 dan Buzzer Berbasis Mikrokontroler Arduino Uno
(Universitas Sumatera Utara, 2023)A sparrow repellent device has been designed for rice plants because farmers have difficulty protecting rice plants from sparrows. Therefore, research on the design of a sparrow pest repellent on rice plants was carried ...