Department of Chemistry: Recent submissions
Now showing items 81-100 of 2907
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Preparasi dan Karakterisasi Membran Maleasi Karet Alam/Polistirena Tersulfonasi dengan Divinil Benzena sebagai Agen Pengikat Silang
(Universitas Sumatera Utara, 2024)This research examines the preparation and characterization of membranes with the main ingredients of natural rubber maleation and sulfonated polystyrene carried out through three stages. The first stage is the maleation ... -
Pembuatan Karbon Aktif Teraktivasi Zncl2 Dari Kulit Jeruk Manis (Citrus Sinensis) Dalam Penurunan Kadar Logam Pb (II)
(Universitas Sumatera Utara, 2024)The waste produced by sweet orange peel (Citrus sinensis) contains lignocellulosic compounds which can be used as basic ingredients in making activated carbon. The purpose of this research are to determine how to produce ... -
Sintesis 2-Etilheksil Miristat dari Esterifikasi 2-Etilheksil Alkohol dan Asam Miristat pada Perbandingan Rasio Molar dan Berat Enzim Lipase menggunakan Radiasi Mikrowave
(Universitas Sumatera Utara, 2024)The synthesis of 2-Ethylhexyl Miristate from esterification reaction of myristic acid with 2-ethylhexyl alcohol using microwave with lipase enzyme as catalyst has been conducted. The parameters studied in this study were ... -
Analisis Variasi Temperatur dan Waktu Pirolisis terhadap Kristalinitas dan Morfologi Grafena Berlapis Nano dari Tongkol Jagung (Zea Mays L.)
(Universitas Sumatera Utara, 2024)Research on the analysis of temperature and pyrolysis time variations on the crystallinity and morphology of graphene nano sheet from corn cob has been carried out. The aims of this research are to analysis the optimum ... -
Efektivitas Kitosan Oligosakarida pada Formulasi Sediaan Lip Gloss sebagai Antioksidan dengan Metode Dpph (2,2-Diphenyl-1-Picrylhydrazyl)
(Universitas Sumatera Utara, 2024)Research has been conducted on the use of chitosan oligosaccharides in the formulation of lip gloss preparations as antioxidants. Lip gloss is a product that gives a glossy effect and shine to the lips, helps increase ... -
Analisis Kualitas Sabun Mandi Cair dengan Penambahan Minyak Daun Eucalyptus Grandis sebagai Agen Antibakteri Staphylococcus Aureus
(Universitas Sumatera Utara, 2024)Soap is one of the most important products in everyday life. The need for soap is increasing year by year, as shown in BPS data from 2016 to 2021. One type of soap is liquid body wash. Liquid body wash has several advantages ... -
Analisis Sifat Fisika dan Kimia Grafena Berlapis Nano dari Tempurung Kelapa dan Cangkang Kemiri Pada Berbagai Temperatur Pirolisis dan Massa Bahan Baku
(Universitas Sumatera Utara, 2024)Research on the analysis of the physical and chemical properties of Nano-Coated Graphene (GBN) from coconut shells and candlenut shells using the pyrolysis method has been carried out. The use of coconut shell in this ... -
Pembuatan Cangkang Kapsul dari Kombinasi Pati Singkong (Manihot Esculenta) dan Natrium Karboksimetil Selulosa (Na-CMC)
(Universitas Sumatera Utara, 2024)Capsules are pharmaceutical preparations containing drugs that have a wrapper in the form of a hard or soft shell which is projected to increase by 8.1% due to the increase in disease prevalence. However, commercial ... -
Analisis Termal Aspal Modifikasi Poliuretan Alam dari Getah Pinus Merkusii (Jungh et de Vries) dan Peg 400 dengan Penambahan Toluena 2,4-Diisosianat
(Universitas Sumatera Utara, 2024)This study examines the modification of polymer asphalt with polyurethane through several stages. The first stage involves the production of polyol from Pinus merkusii resin by reacting it with 90% formic acid and 30% H₂O₂. ... -
Analisis Variasi Rasio Temperatur dan Waktu Pirolisis terhadap Produksi Grafena Berlapis Nano dari Cangkang Kelapa Sawit (Elaeis Guineensis Jacq.)
(Universitas Sumatera Utara, 2024)Research on the analysis of the variatios in temperature (T) and time (t) ratio during pyrolysis on the production of graphene nano sheets from palm kernel shells has been conducted. The purpose of this research is to ... -
Modifikasi Pati Sukun (Artocarpus Altilis) melalui Reaksi Esterifikasi dengan Asam Miristat dalam Media Larutan Urea/NaOH
(Universitas Sumatera Utara, 2024)Modification of breadfruit starch into myristic starch was done through esterification reaction between breadfruit starch (Artocarpus altilis) and myristic acid. This research was conducted in two stages, namely, isolation ... -
Sintesis Metil Oleat dari Asam Oleat dengan Metanol pada Perbandingan Rasio Molar dan Daya Microwave menggunakan Katalis Abu Kulit Durian
(Universitas Sumatera Utara, 2024)The synthesis of methyl oleate from esterification reaction between oleic acid with methanol was performed using calcined durian peel ash as catalyst and microwave irradiation has been carried out. Durian powder was ... -
Efektivitas Defibrilasi pada Isolasi Nanoserat Selulosa Batang Eceng Gondok (Eichornia Crassipes) melalui Perlakuan Awal Ledak Uap dan Variasi Waktu Ultrasonikasi
(Universitas Sumatera Utara, 2024)Water hyacinth is among the world's top 10 invasive weeds due to its adaptability and high growth rate. Its high cellulose content makes water hyacinth a potential source of cellulose nanofiber (CNF) for alternative ... -
Sintesis Natrium Alginat Termodifikasi Dopamin sebagai Binder untuk Anoda Nanosilikon dalam Baterai Ion Litium
(Universitas Sumatera Utara, 2024)The potential of silicon as the anode material of future high-capacity lithium-ion batteries is still difficult to realize due to the low mobility of electrons and the material's vulnerability to damage from considerable ... -
Efek Oksida Logam terhadap Sifat Fisis Minyak Sawit/Solar
(Universitas Sumatera Utara, 2024)Indonesia's petroleum reserves are decreasing daily, due to the non-renewable nature of fossil fuels. Alternative energy sources are needed as a substitute for fuel by utilizing palm oil and diesel oil commonly called ... -
Karakterisasi Film dari Pati Singkong (Manihot Esculenta) sebagai Antibakteri Pseudomonas Aeruginosa pada Luka Sayat
(Universitas Sumatera Utara, 2024)Films are thin sheets used to close and protect wounds. Films are often made from materials such as starch and chitosan as an antibacterial agent for Pseudomonas aeruginosa. Film making in the form of plaster is by mixing ... -
Impregnasi Fe/Cu pada Material Mesopori Silika Template Metil Ester Risinoleat sebagai Adsorben-Reduktor Kromium (VI)
(Universitas Sumatera Utara, 2024)Chromium is one of the heavy metals that is widely used in industrial activities. Chromium metal (especially hexavalent chromium) has high toxicity. Nowadays, adsorption-reduction technique is the most efficient treatment ... -
Modifikasi Pati Sukun (Artocarpus Altilis) melalui Reaksi Esterifikasi dengan Asam Laurat dalam Media Larutan Urea/NaOH
(Universitas Sumatera Utara, 2024)Modification of lauric starch was done through esterification reaction between breadfruit starch (Artocarpus altilis) with lauric acid in urea/NaOH solution media. This research was conducted in two stages, namely, ... -
Sintesis Metil Oleat dari Asam Oleat dan Metanol pada Variasi Berat Katalis Abu Kulit Telur Ayam dan Waktu Reaksi menggunakan Radiasi Microwave
(Universitas Sumatera Utara, 2024)The synthesis of methyl oleate was conducted from the esterification reaction of oleic acid with methanol using a chicken eggshell ash catalyst under microwave irradiation. Chicken eggshell powder was analyzed ... -
Preparasi Poliuretan Alam dari Campuran Getah Nangka (Artocarpus Heterophyllus) dan PEG 400 menggunakan Monomer Isosianat (TDI)
(Universitas Sumatera Utara, 2024)Preparation of natural polyurethane from jackfruit sap is done by reacting the jackfruit sap with 98% formic acid and 30% H2O2, then polyurethane production is carried out by reacting the jackfruit sap polyol with PEG ...