Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 201-220 of 11447
-
Modifikasi Pati Sukun (Artocarpus altilis) melalui Reaksi Oksidasi Menggunakan Kalium Permanganat
(Universitas Sumatera Utara, 2025)Carboxylic starch can be produced from the modification process of breadfruit starch (Artocarpus altilis) through oxidation reaction using potassium permanganate. This research was conducted in two stages, namely, isolation ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Jirak (Eurya acuminata DC)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compounds from the bark of Jirak (Eurya acuminata DC.) has been done through several stages, namely maceration extraction with methanol solvent, fractionation with ethyl acetate ... -
Pengaruh Variasi Waktu Aging terhadap Morfologi Hidroksiapatit Hasil Sintesis dari Cangkang Telur Bebek (Anas platyrhynchos domesticus) melalui Metode Pengendapan Basah
(Universitas Sumatera Utara, 2025-07-21)Hydroxyapatite (HAp) was successfully synthesized from duck eggshells using the wet precipitation method with aging time variations of 12, 24, and 36 hours. This study aimed to evaluate the effect of aging time on the ... -
Karakteristik Kertas Dokumen Berbasis Pulp Kapas, Selulosa Bakteri Dari Kombucha, dan Kalsium Karbonat Sebagai Bahan Pengisi
(Universitas Sumatera Utara, 2025)Research on the manufacture of document paper based on natural pulp consisting of cotton fiber, bacterial cellulose from kombucha, and the addition of calcium carbonate (CaCO₃) as a filler. This study aims to examine the ... -
Sintesis Dan Karakterisasi Nitrogen-Doped Carbon Dots (N-CDs) Berbasis p-Aminofenol Melalui Metode Hidrotermal
(Universitas Sumatera Utara, 2025)The development of nanotechnology encourages the search for new nano-sized functional materials with good optical properties and high biocompatibility. One of the materials that meets these criteria is carbon dots (CDs), ... -
Sintesis Dan Karakterisasi Hidroksiapatit Dari Limbah Cangkang Keong Mas Melalui Analisa Komposisi Kimia Dan Morfologi
(Universitas Sumatera Utara, 2025)The synthesis of hydroxyapatite (HAp) from golden apple snail shells (Pomacea canaliculata) has been carried out using the wet precipitation method. This study aims to evaluate the effect of varying calcium oxide (CaO) ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Pirdot (Saurauia vulcani Korth.)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compound from the bark of Pirdot (Saurauia vulcani Korth.) had been carried out through the maceration extraction stage with methanol solvent. The methanol extract dissolved with ... -
Pembuatan Mi Kering Tersubstitusi Tepung Kelapa (Cocos nucifera) dan Tepung Mocaf dengan Penambahan Pektin dari Kulit Jeruk Manis (Citrus sinensis)
(Universitas Sumatera Utara, 2025)Sweet orange peel (Citrus sinensis) is an agro-industrial waste that contains high amounts of pectin and has potential as a natural food additive. Pectin functions as a chewing and texture-forming ingredient in processed ... -
Sintesis Isoamil Miristat dari Asam Miristat pada Variasi Konsentrasi Katalis Asam Sulfat dan Rasio Mol Asam Miristat dan Isoamil Alkohol Menggunakan Alat Pendispersi Homogen
(Universitas Sumatera Utara, 2025)Synthesis of isoamyl myristate from the reaction of esterification reaction between myristic acid and isoamyl alcohol catalyzed by sulfuric acid. catalyst using a homogeneous dispersing device at room temperature has been ... -
Bioekologi Ikan Cencen (Mystacoleucus marginatus, Valenciennes 1842) sebagai Dasar Upaya Pelestarian Sumberdaya Perikanan di Sungai Lau Belawan, Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)Lau Belawan River has the potential for yellow-finned barb fish (Mystacoleucus marginatus, Valenciennes 1842). Ecologically, yellow-finned barb fish is a fish resources that must be preserved because it has the potential ... -
Sintesis Metil Oleat Menggunakan Katalis Deep Eutectic Solvents Pada Variasi Waktu Reaksi dan Kecepatan Pengadukan Pendispersi Homogen
(Universitas Sumatera Utara, 2025)Methyl oleate synthesis was carried out through an esterification reaction between oleic acid and methanol using a Deep Eutectic Solvent (DES) catalyst with a homogeneous disperser. The DES catalyst was obtained from a ... -
Analisis kandungan Logam berat Besi, Tembaga, dan Mangan Pada Road Dust Resuspension-Suspension (RDR-S) di Jalan Jamin Ginting
(Universitas Sumatera Utara, 2025)This study aims to determine the concentration and compare heavy metals in road dust Road Dust Resuspension-suspension (RDR-S) at two identical locations on Jamin Ginting Road in Medan. The analysis of metal concentrations ... -
Sintesis Metil Oleat dari Asam Oleat dan Metanol pada Variasi Rasio Mol dan Katalis K2O/Zeolit Menggunakan Pengaduk Pendispersi Homogen
(Universitas Sumatra Utara, 2025)The synthesis of methyl oleate was carried out through an esterification reaction between oleic acid and methanol using a K₂O/zeolite catalyst and a homogenizing disperser stirrer. The K₂O/zeolite catalyst was prepared via ... -
Sintesis Isoamil Miristat dari Asam Miristat pada Variasi Waktu dan Kecepatan Pengadukan Menggunakan Alat Pendispersi Homogen
(Universitas Sumatera Utara, 2025)Synthesis of isoamyl myristate from the esterification reaction between myristic acid and isoamyl alcohol with sulfuric acid catalyst using a homogeneous dispersing tool at room temperature has been carried out at variations ... -
Algoritma Branch and Bound dengan Clustering Metode Sweep untuk Menyelesaikan Masalah Vehicle Routing Problem(VRP) (Studi Kasus: PT. Mitha Artha Keluarga)
(Universitas Sumatera Utara, 2025)The vehicle routing problem is a combinatorial optimization problem that aims to determine the most efficient route for a number of vehicles to deliver goods to a number of bases. PT Mitha Artha Keluarga, as an authorized ... -
Sintesis Basa Schiff melalui Kondensasi Selulosa Dialdehida dari Tandan Kosong Kelapa Sawit dengan Etilendiamina sebagai Wet Strength Agent (WSA)
(Universitas Sumatera Utara, 2025)Cellulose was isolated from empty palm bunches (TKKS) using a combination of 3.5% HNO3, 2% NaOH, Na2SO3, 1.75% NaOCl, and 10% H2O2. A total of 18.167 g of cellulose was obtained, which corresponds to 24.22% of the initial ... -
Isolasi Dan Identifikasi Golongan Senyawa Flavonoida Dari Kulit Batang Bakau Api – Api (Avicennia marina (Forssk.) Vierh.)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compounds from the bark of the api- api mangrove (Avicennia marina (Forssk.) Vierh.) have been carried out through several stages, namely maceration extraction with methanol ... -
Fortifikasi Bayam Merah (Amaranthus tricolor L.) sebagai Sumber Nitrogen dan Zat Besi pada Nata de Leri Ketan Putih dalam Mencegah Anemia
(Universitas Sumatera Utara, 2025)Anemia is recognized as a global health issue primarily caused by iron deficiency. A potential strategy to address this problem has been identified in food fortification. In this research, the potential of red spinach ... -
Sintesis dan Karakterisasi Adsorben Karbon Aktif Hydrilla Verticillata/Kitosan/Tio2 untuk Menyerap Cu, Pb, Zn, Cr dan Fe dalam Limbah Cair dengan Metode Fotokatalis
(Universitas Sumatera Utara, 2025)Environmental pollution by heavy metals is a serious problem that requires effective solutions. One promising method is the adsorption method using biomass-based activated carbon. Hydrilla verticillata-activated carbon was ... -
Karakterisasi Edible Coating Berbahan Pektin/Kitosan/Ekstrak Daun Kenikir (Cosmos Caudatus) Untuk Meningkatkan Umur Simpan Pada Buah Tomat
(Universitas Sumatera Utara, 2025)An edible coating based on pectin, chitosan, and the addition of Cosmos caudatus (kenikir) leaf extract was developed in this study. The aim of lhe research was to determine the characteristics of the edible coating and ...