Department of Chemistry: Recent submissions
Now showing items 181-200 of 3020
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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 ... -
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 ...