Department of Chemistry: Recent submissions
Now showing items 21-40 of 3053
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Preparasi Biofilm Antibakteri Berbasis Karboksimetil Selulosa, Selulosa Bakteri Teh Kombucha, Kitosan atau TiO2 dengan Gliserol sebagai Plasticizer
(Universitas Sumatera Utara, 2025)The preparation and characterization of antibacterial biofilms based on carboxymethyl cellulose, bacterial cellulose from kombucha tea, chitosan or TiO₂, with glycerol as a plasticizer, were carried out in this study. ... -
Karakterisasi Kertas Dinding Berbasis Pulp Pinus Merkusii yang Dimodifikasi dengan Variasi Selulosa Bakteri Hasil Fermentasi Teh Kombucha dan Kalsium Karbonat
(Universitas Sumatera Utara, 2025)This research was conducted to produce wallpaper based on natural materials as an alternative to conventional wallpaper made of PVC by utilizing mercury pine pulp as a matrix, bacterial cellulose fermented from kombucha ... -
Analisis Limbah Karbon Aktif Filter Depot Air Minum sebagai Adsorben untuk Penurunan Logam Besi pada Air Sumur Bor
(Universitas Sumatera Utara, 2025)The limited supply of clean water around the Medan Industrial Area encourages people to use drilled well water which is susceptible to contamination by heavy metal contaminants, especially iron (Fe) which has levels ... -
Analisis Kandungan Logam Berat Tembaga, Timbal, dan Seng pada Road Dust Resuspension Suspension (RDR-S) di Kawasan Pinang Baris
(Universitas Sumatera Utara, 2025)The development and changes in technology produce emissions, especially from transportation activities that are affected by tire and brake wear, which produce road dust in the form of solid particles, thus triggering air ... -
Pembuatan Butil Dekanoat dari Esterifikasi Butanol dan Asam Dekanoat pada Perbandingan Waktu Reaksi dan Daya Microwave Menggunakan Katalis Enzim Lipase
(Universitas Sumatera Utara, 2025)The production of Butyl Decanoate from Butanol and decanoic acid has been carried out through an esterification reaction using lipase enzyme as a catalyst and microwave radiation. The parameters studied in this study were ... -
Formulasi Sediaan Patch Ekstrak Etanol Daun Kenikir (Cosmos caudatus Kunth.) sebagai Penghambat Bakteri Propionibacterium acnes
(Universitas Sumatera Utara, 2025)Patch preparation is a transdermal drug delivery system that is applied to the skin surface to provide local and systemic therapeutic effects. This study aims to develop a patch formulation containing ethanol extract of ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Kamala Merah (Mallotus Philippensis (Lam.) Müll.Arg)
(2025)Isolation and identification of flavonoid compounds from the bark of red kamala (Mallotus Philippensis (Lam.) Müll.Arg) has been carried out through maceration extraction stages using methanol solvent. The methanol extract ... -
Uji Aktivitas Antioksidan Fraksi Etil Asetat dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Buah Aren (Arenga Pinnata (Wurmb) Merr)
(2025)Isolation and identification of flavonoid compounds from the skin of sugar palm fruit (Arenga pinnata (Wurb.) Merr) were carried out through maceration extraction using methanol solvent, followed by partition extraction ... -
Analisis Pupuk Majemuk dengan Penambahan Variasi Asam Fulvat terhadap Pertumbuhan Tanaman Sawi Hijau ( Brassica juncea L. )
(Universitas Sumatera Utara, 2025)This research was about the effect of adding variations of fulvic acid to compound fertilizer on the growth of mustard greens (Brassica juncea L.). The study was conducted with the aim of analyzing whether the N, P, and K ... -
Uji Aktivitas Antioksidan Fraksi Etil Asetat dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Buah Srikaya Hijau (Annona squamosa. L)
(Universitas Sumatera Utara, 2025)Green soursop.(Annona squamosa. L) is oneyof the tropical plants that is often used in traditional medicine and has a content of secondaryymetabolite compounds, including flavonoids that have the potentialyas natural ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Matoa (Pometia pinnata J.R. Forst & G. Forst)
(Universitas Sumatera Utara, 2025)Traditionally,matoa plant was utilized as a medicinal remedy by local communities. The benefits of matoa are associated with the presence of secondary metabolites, namely flavonoids. The isolation and identification of ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Biji Buah Namnam (Cynometra cauliflora L.)
(Universitas Sumatera Utara, 2025)Cynometra cauliflora L. is a plant species in the Fabaceae family that had potential as a source of bioactive compounds, but phytochemical studies on its seeds were still limited. This study aims to isolate and identify ... -
Karakterisasi Biofilm Non Toksik dan Berkestabilan Termal Berbasis Karboksimetilselulosa dan Selulosa Bakteri Teh Kombucha dengan Gliserol Sebagai Plasticizer
(Universitas Sumatera Utara, 2025)Biofilm is a thin film made from a biopolymer or natural material which has the potential as an edible film. This research aims to make biofilms based on carboxymethylcellulose and bacterial cellulose with glycerol as a ... -
Modifikasi Pati Ubi Jalar Putih (Ipomoea Batatas-Linneaus) melalui Ikat Silang dengan Natrium Tripolifosfat
(Universitas Sumatera Utara, 2025-07-09)Modification of sweet potato starch phosphate has been done through cross-linking reaction between white sweet potato starch (Ipomoea Batatas-Linneaus) with sodium tripolyphosphate (STPP). This research was conducted in ... -
Studi Pembuatan Zat Aditif Bahan Bakar Gasolin dari Hidrogenolisis Gliserol dengan Katalis Nikel Klorida
(Universitas Sumatera Utara, 2025)The use of glycerol, a by-product of the biodiesel industry, as a raw material for making fuel additives is one of the solutions in the development of renewable energy. This study aims to synthesize the compounds of acetyl ... -
Pembuatan 2-Etilheksil Laurat dari Esterifikasi Asam laurat dan 2-Etilheksanol Pada Perbandingan Rasio Mol dan Berat Enzim Lipase Menggunakan Radiasi Mikrowave
(Universitas Sumatera Utara, 2025)The production 2-Ethylhexyl Laurate from esterification reaction of Lauric acid with 2-ethylhexanol with lipase enzyme as catalyst under microwave irradiation has been conducted. The parameters studied in this study were ... -
Analisis Logam Tembaga (Cu) dan Seng (Zn) pada Bubuk Kopi (Coffea spp.) dari Home Industri di Kecamatan Melati Diski
(Universitas Sumatera Utara, 2025)This study aims to analyze the levels of copper (Cu) and zinc (Zn) in coffee powder (Coffea spp.) produced by home industries in Melati Diski District, North Sumatra. The samples were analyzed using the dry destruction ... -
Pemanfaatan Ekstrak Etanol Daun Kemuning (Murraya paniculata L. Jack) pada Sediaan Masker Gel
(Universitas Sumatera Utara, 2025)The kemuning (Murraya paniculata L. Jack) plant grows wild in shrubs, forest edges, or is planted as an ornamental plant and hedge plant. Yellow leaves are known for their traditional benefits for smoothing the skin. ... -
Sintesis Poliol melalui Reaksi Epoksidasi dan Hidroksilasi Minyak Goreng Bekas pada Variasi Waktu Reaksi dan Kecератаn Pengadukan Menggunakan Homoginezer
(Universitas Sumatera Utara, 2025)Synthesis of polyol compounds from used cooking oil has been carried out through two reaction stages, namely epoxidation and hydroxylation. These polyol compounds have the potential as intermediates or precursors for the ... -
Analisis Kadar Logam Kadmium (Cd) pada Kubis Putih (Brassica Oleracea L.) Menggunakan Metode Destruksi Basah Secara Spektroskopi Serapan Atom (SSA)
(Universitas Sumatera Utara, 2025)Farmers in Namorambe District, Deli Serdang Regency, are still heavily dependent on the intensive use of inorganic fertilizers in their cultivation practices, including for white cabbage (Brassica oleracea L.). Excessive ...