Department of Chemistry: Recent submissions
Now showing items 41-60 of 2998
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Sintesis Metil Oleat Dari Asam Oleat dan Metanol pada Variasi Waktu Reaksi dan Konsentrasi Katalis CaO/Zeolit Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025)Synthesis of methyl oleate from esterification reaction between oleic acid and methanol catalyzed by CaO/Zeolite using a homogenizer device at room temperature was carried out at different variations, namely catalyst ... -
Penentuan Kadar Besi (Fe) dan Tembaga (Cu) pada Air Sumur Bor Sebelum dan Sesudah Penyaringan Menggunakan Tabung Penyaring FRP (Fiberglass Reinforced Plastic)
(Universitas Sumatera Utara, 2025)Groundwater in several areas still contains heavy metals and has a physical quality that does not meet drinking water quality standards, so effective filtering efforts are needed. One method used is the application of a ... -
Pengaruh Elektrolit Amonium Klorida Terhadap Kinerja Elektroda Grafena Berlapis Nano dari Cangkang Kemiri (Aleurites moluccana (L.) Willd) Pada Katoda Baterai Primer
(Universitas Sumatera Utara, 2025)Research on the Effect of Ammonium Chloride Electrolyte on the Performance of Graphene Nano Sheets Electrode from Candlenut Shell (Aleurites moluccana (L.) Willd) on Primary Battery Cathode has been conducted. The purpose ... -
Sintesis Dan Karakterisasi Nanokomposit Fe₃O₄/Nitrogen-Doped Carbon Dots (N-CDs) Dengan Metode Sonikasi
(Universitas Sumatera Utara, 2025)Nitrogen-Doped Carbon Dots (N-CDs), which are water-soluble, tend to be difficult to separate from the aqueous phase. To overcome this issue, Fe₃O₄ is used as a nanocomposite-forming material due to its magnetic properties, ... -
Pembuatan dan Karakterisasi Termoplastik Elastomer dari Paduan EPDM/Polipropilena dengan Pengisi Serbuk Tanah Liat sebagai Peredam Benturan Pintu Kendaraan
(Universitas Sumatera Utara, 2025)The increase in the number of vehicles in Indonesia creates opportunities for the rubber component industry, including weather strips for car doors. This study aims to produce a blend of EPDM and polypropylene with ... -
Sintesis dan Karakterisasi Paduan LDPE/EPDM dengan Bahan Pengisi Serbuk Tanah Liat sebagai Peredam Benturan Pintu Kendaraan
(Univesitas Sumatera Utara, 2025)A composite study was conducted using a blend of LDPE/EPDM with the addition of clay powder as a filler, applied as an impact absorber for vehicle door seals. The manufacturing process involved mixing LDPE plastic with ... -
Sintesis Fe3O4/ZIF-8 dari Pasir Besi sebagai Adsorben Logam Berat Pb(II): Studi Efektivitas Adsorpsi terhadap Waktu Kontak
(Universitas Sumatera Utara, 2025-07-21)The rapid industrialization and urbanization have increased environmental pollution, particularly by toxic heavy metals like Pb(II), which pose serious health risks. WHO reports that Pb(II) exposure causes over 1.5 million ... -
STUDI SIFAT BIOAKTIF DAN FUNGSIONAL KOMBUCHA DENGAN GOJI BERRY (Lycium barbarum ) AKTIVITAS ANTIOKSIDAN, ANTIMIKROBA DAN UJI TOKSISITAS
(Universitas Sumatera Utara, 2025)The bioactive and functional properties of Goji berry (Lycium barbarum) kombucha, including its antioxidant, antimicrobial, and toxicity profiles, have been examined. This study aimed to evaluate how the addition of Goji ... -
Analisis Pupuk Anorganik Cair Dengan Penambahan Asam Amino Terhadap Pertumbuhan Sawi Hijau (Brassica juncea L.)
(Universitas Sumatera Utara, 2025)Analysis of liquid inorganic fertilizer with the addition of amino acids on the growth of mustard greens (Brassica juncea L.) has been conducted. This study aims to analyze the effect of variations in the addition of amino ... -
Kinerja Nikel/Grafena Berlapis Nano dan Perak/Grafena Berlapis Nano dari Cangkang Kemiri Menggunakan Metode Pirolisis Sebagai Antibakteri Staphylococcus aureus
(Universitas Sumatera Utara, 2025)Research on the Performance of Nickel/Graphene Nano Sheets (Ni/GNS) and Silver/Graphene Nano Sheets (Ag/GNS) from Candlenut Shells Using Pyrolysis Method as Antibacterial Staphyloccocus aureus has been conducted. The purpose ... -
Pembuatan Handbody Cream dari Eksktrak Etanol Daun Kemuning (Murraya panicula L Jack) dengan Uji Antioksidan Metode DPPH dan Uji Toksisitas
(Universitas Sumatera Utara, 2025)Handbody cream is a skin care product in the form of cream that is used to moisturize and care for the body skin, including hands, feet, and other body parts. The leaves of Kemuning contain several alkaloid compounds that ... -
Karakterisasi Edible Coating dari Nanopartikel Pati Biji Durian dan Minyak Atsiri Kayu Manis untuk Memperpanjang Masa Simpan Pisang Barangan
(Universitas Sumatera Utara, 2025)Barangan banana (Musa acuminata L.) is one of Indonesia’s leading horticultural commodities with significant economic value. However, it is highly susceptible to postharvest deterioration due to rapid physiological processes. ... -
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, 2025-07-21)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 ...