Department of Chemistry: Recent submissions
Now showing items 61-80 of 2907
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Pembuatan Metil Ester Asam Lemak dari Minyak Sawit melalui Reaksi Transesterifikasi pada Variasi Berat Katalis K2O/SiO2
(Universitas Sumatera Utara, 2024)The production of fatty acid methyl esters from palm oil has been conducted using transesterification reactions, utilizing a catalyst derived from solid waste sludge from the PDAM. The sludge that has been cleaned and dried ... -
Pemanfaatan Kulit Jengkol sebagai Prekursor dalam Sintesis Carbon Dots Doping Sulfur Menggunakan Metode Hidrotermal
(Universitas Sumatera Utara, 2024)The use of jengkol peel which contains phytochemical compounds as a precursor in making carbon dots using the hydrothermal method, and with the addition of sodium disulfite as sulfur doping has been carried out. Synthesis ... -
Pembuatan Metil Ester Asam Lemak melalui Reaksi Transesterifikasi pada Perbandingan Rasio Molar Metanol : Minyak Sawit Menggunakan Katalis K2O/SiO2
(Universitas Sumatera Utara, 2024)The production of fatty acids methyl ester from palm oil has been carried out through transesterification reaction of solid sludge waste from the municipal water supply (PDAM) via impregnation method with KOH to yield ... -
Sintesis Carbon Dots dari Kulit Jengkol dengan Doping Ganda Nitrogen dan Sulfur Menggunakan Metode Hidrotermal
(Universitas Sumatera Utara, 2024)Synthesis of Carbon dots (CDs) from jengkol peel precursors with double doping of Nitrogen and Sulfur using the hydrothermal method has been carried out. Urea and Sodium thiosulfate are used as Nitrogen and Sulfur doping ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida Serta Uji Aktivitas Antibakteri dari Kulit Batang Penda Emas (Xanthostemon Chrysanthus (F.Muell.) Benth.)
(Universitas Sumatera Utara, 2024)The flavonoid compound had been isolated from stem bark of golden penda (Xanthostemon chrysanthus (F.Muell.) Benth.). Isolation was carried out by maceration extraction method with methanol and methanol extract was ... -
Karakterisasi dan Modifikasi Aspal-Karet Alam Cair (LNR) dengan Degradasi Fenilhidrazine Menggunakan Ultraviolet
(Universitas Sumatera Utara, 2024)Natural rubber is a polymer compound that has high elastic properties. The elasticity of natural rubber is very necessary in improving the physical properties of asphalt mixtures. Such long molecular chains are one of ... -
Penentuan Kapasitas Penyerapan Adsorben Berbasis Carboxymethyl Cellulose dan Pati Jagung terhadap Methylene Blue Menurut Persamaan Langmuir dan Freundlich
(Universitas Sumatera Utara, 2024)Research about the adsorption of methylene blue using a biopolymer-based adsorbent from carboxymethyl cellulose and corn starch, cross-linked by aluminium sulfate and boric acid has been carried out. This research objected ... -
Penentuan Kadar Logam Besi (Fe) dan Mangan (Mn) pada Air Sumur Bor dengan Karbon Aktif Eceng Gondok terhadap Pengaruh Waktu Kontak
(Universitas Sumatera Utara, 2024)Increased development in the industrial sector often produces waste, chemicals, or leaks from factory infrastructure that can contaminate groundwater and threaten the quality of borehole water. One of the hazardous pollutants ... -
Karakterisasi Paduan EPDM/Nr Sir-20 dengan Pengisi Arang Aktif Tempurung Kelapa (Cocos Nucifera) sebagai Peredam Benturan Pintu Kendaraan (Weather Strip)
(Universitas Sumatera Utara, 2024)Composite research of EPDM/NR SIR-20 blend with the addition of coconut shell activated carbon powder as a filler used as a car door impact absorber (weather strip). The weather strip was prepared by mixing SIR-20 natural ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Buah Kecapi (Sandoricum Koetjape Merr)
(Universitas Sumatera Utara, 2024)Isolasi dan identifikasi senyawa flavonoida dari buah kecapi (Sandoricum koetjape Merr) dilakukan melalui tahapan ekstraksi maserasi dengan pelarut metanol. Ekstrak metanol dipekatkan, dilarutkan dengan etil asetat ... -
Efek Ph Terhadap Sifat Optik Fluoresensi Carbon Dots Dari Daun Adam Hawa (Rhoeo Discolor L.) Menggunakan Metode Solvotermal
(Universitas Sumatera Utara, 2024)Adam Hawa leaves contain flavonoid compounds which can be used as precursors of CDs. The aim of this research was to synthesize CDs from Adam Hawa leaves and analyze the effect of pH value on optical properties. In the ... -
Sintesis Selulosa Sulfat dari Limbah Kertas Melalui Reaksi Sulfasi pada Perbandingan Mol Asam Sulfamat : Urea Menggunakan Pelarut DMSO
(Universitas Sumatera Utara, 2024)sulfamic acid and urea as base catalyst. Preparation of waste paper samples was carried out without treatment, delignification results were carried out with the addition of NaOH 2% and NaOCl 1.75%, and isolation was carried ... -
Analisis Kristalinitas dan Morfologi Grafena Berlapis Nano dengan Variasi Rasio Massa Chip Arang dan Karbon Aktif
(Universitas Sumatera Utara, 2024)The analysis of crystallinity and morphology of Graphene Nano Sheets (GNS) from three biomass raw materials (coconut shell, candlenut shell, and corn cob) produced from variations in the mass ratio of charcoal chips and ... -
Studi Karakteristik Pati dari Limbah Batang Kelapa Sawit (Elaeis guineensis) berdasarkan Ketinggiannya dan Variasi Konsentrasi Pelarut Natrium Bisulfit
(Universitas Sumatera Utara, 2024)Oil palm plantations in Indonesia produce large amounts of stem waste when the trees reach the end of their productive lives. This study explored the potential use of oil palm stem starch for industrial applications, ... -
Modifikasi Pati Sukun (Artocarpus altilis) melalui Reaksi Esterifikasi dengan Asam Stearat dalam Media Larutan Urea/NaOH
(Universitas Sumatera Utara, 2024)Modification of breadfruit starch into starch stearate has been done through esterification reaction between breadfruit starch (Artocarpus altilis) and stearic acid in urea/NaOH solution media. The esterification reaction ... -
Pembuatan Setil Oleat dari Reaksi Esterifikasi Setil Alkohol dan Asam Oleat Menggunakan Katalis Enzim Lipase dan Radiasi Mikrowave Widia Katarina Sianipar
(Universitas Sumatera Utara, 2024)The production of cetyl oleate from the esterification of oleic acid and cetyl alcohol with a lipase enzyme catalyst and under a microwave irradiation has been carried out. The parameters examined in this reserch are molar ... -
Sensitivitas Elektroda Tembaga Termodifikasi Kitosan/Serium Oksida (CeO2) dalam Mendeteksi Konsentrasi Antibiotik Tetrasiklin dengan Siklik Voltammetri
(2024)Chitosan/Cerium Oxide (CeO2) modified copper electrode with a simple and sensitive has been successfully carried out using a cyclic voltammetric method to detect tetracycline antibiotic. The effect of the addition of ... -
Ekstraksi Fase Padat Metamfetamin pada Maggot dan Analisis menggunakan Gas Chromatographymass Spectrometry dan Fourier Transform Infra Red
(Universitas Sumatera Utara, 2024)Drug abuse, especially on narcotics and dangerous drugs (drugs) is currently a concern given the high rate of drug abuse in Indonesia. The purpose of this study was to analyze methamphetamine in necrophagous maggots grown ... -
Analisis Morfologi, Kristalinitas, dan Rendemen Grafena Berlapis Nano dari Cangkang Kelapa Sawit (Elaeis Guineensis Jacq.) dengan Metode Pirolisis
(Universitas Sumatera Utara, 2024)Research on the analysis of morphology, crystallinity and yield of Graphene Nano Sheet (GNS) from palm kernel shell using pyrolysis method has been carried out. The purpose of this study was to analyze the optimum ... -
Pemanfaatan Ekstrak Etanol Biji Pepaya (Carica Papaya L.) pada Sediaan Masker Gel sebagai Anti Jerawat
(Universitas Sumatera Utara, 2024)Facial mask is one of the treatments that aims to tighten the skin and treat the skin with ingredients contained in cosmetics. Papaya seeds (Carica Papaya L.) are known to contain alkaloid compounds that have the potential ...