Department of Chemistry: Recent submissions
Now showing items 41-60 of 3020
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Pengaruh Elektrolit Natrium Klorida terhadap Kinerja Elektroda Grafena Berlapis Nano pada Katoda Baterai Primer
(Universitas Sumatera Utara, 2025)This study aims to investigate the effect of sodium chloride (NaCl) electrolyte concentration on the performance of graphene nanosheet (GBN) electrodes synthesized from candlenut shells as the cathode material in primary ... -
Pembuatan Metil Oleat dari Esterifikasi Asam Oleat dengan Metanol pada Perbandingan Waktu Reaksi dan Kecepatan Pengadukan Peralatan Pendispersi Homogen
(Universitas Sumatera Utara, 2025)The production of methyl oleate from oleic acid and methanol has been carried out through esterification reaction using lipase enzyme as a catalyst and homogenizer stirring. The parameters studied in this study were reaction ... -
Sintesis Biopelumas Ester dari Minyak Goreng Bekas dan Pentaeritritol Menggunakan Green Catalyst/Solvent dan Optimasinya dengan Desain Box-Behnken
(Universitas Sumatera Utara, 2025)Ester biolubricant has been synthesized from waste cooking oil (WCO) and pentaerythritol by using catalyst and solvent Deep Eutectic Solvents (DESs) and homogenizer. WCO refinery was by addition of 0.05% (v/v) H3PO4 and ... -
Sintesis Metil Oleat dari Asam Oleat dan Metanol Pada Variasi Waktu Reaksi dan Kecepatan Pengadukan
(Universitas Sumatera Utara, 2025)The synthesis of methyl oleate was carried out through the esterification reaction of oleic acid and methanol using a K₂O/Zeolite catalyst with a homogeneous dispersing stirrer to determine the optimal conditions for ... -
Sintesis Metil Oleat dari Asam Oleat dan Metanol pada Variasi Rasio Mol dan Konsentrasi Katalis Green Chemistry Deep Eutetic Solvent (DES))
(Universitas Sumatera Utara, 2025)The synthesis of methyl oleate from esterification reactions between oleic acid and methanol used green chemistry deep eutectic solvent (DES) catalyst using homogenizer. DES catalyst is prepared by mixing of choline chloride ... -
Pemanfaatan Ekstrak Kasar Enzim Lipase dari Kecambah Biji Karet (Hevea brasiliensis) sebagai Bahan Aditif Biodetergen
(Universitas Sumatera Utara, 2025)This study aimed to determine the activity of lipase enzyme from rubber seed (Hevea brasiliensis) sprouts and evaluate its application as an additive in biodetergent formulation. The method used in this study included the ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Pirdot (Saurauia vulcani Korth.)
(Universita 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 ... -
Pemanfaatan Ekstrak Kasar Enzim Lipase dari Kecambah Biji Jarak Pagar (Jatropha Curcas L.) Sebagai Bahan Aditif Biodetergen
(Universitas Sumatera Utara, 2025)The use of synthetic detergents has caused serious environmental problems due to waste that is difficult to decompose. Utilization of lipase enzymes from castor bean sprouts (Jatropha curcas L.) is one potential solution ... -
Peranan Pengikat Na-CMC terhadap Karakteristik Fisikokimia dan Kapasitansi Spesifik Elektroda Hibrida rGO/Co3O4 Sebagai Material Superkapasitor
(Universitas Sumatera Utara, 2025)The increasing global energy demand drives the development of efficient and sustainable energy storage technologies. Supercapacitors are considered a promising solution due to their high power density and long-term stability, ... -
Sintesis Metil Eugenol Melalui Reaksi Eterifikasi pada Variasi Mol Natrium Karbonat dan Dimetil Karbonat
(Universitas Sumatera Utara, 2025)The synthesis of methyl eugenol has been carried out through the etherification reaction of eugenol with dimethyl carbonate (DMC) using sodium carbonate (Na₂CO₃) as a basic agent and tetrabutylammonium bromide (TBAB) as a ... -
Modifikasi Pati Sukun (Artocarpus altilis) Melalui Reaksi Oksidasi dengan Oksidator Asam Nitrat
(2025)Modification of breadfruit starch into carboxylate starch has been carried out through an oxidation reaction between breadfruit starch (Artocarpus altilis) and nitric acid. The oxidation reaction was carried out with ... -
Formulasi Efektivitas Gel Peel Off Mask Berbasis Kitosan dengan Penambahan Ekstrak Teh Hijau (Camellia Sinensis) Sebagai Antioksidan
(Universitas Sumatera Utara, 2025)A study has been conducted on the use of chitosan in the formulation of Peel Off Mask gel preparations as an antioxidant. Facial masks are very popular beauty care cosmetics to improve skin quality. Peel off facial ... -
Penurunan Kadar Besi (Fe) dan Mangan (Mn) pada Air Sumur Bor Kawasan Tempat Pembuangan Akhir (TPA) Terjun Kecamatan Medan Marelan dengan Karbon Aktif
(Universitas Sumatera Utara, 2025)The availability of clean water is a challenge, especially for the community around Terjun landfill. Terjun landfill is located in Terjun urban village, which is located in Medan Marelan sub-district. In one of the residents' ... -
Modifikasi Zeolit HZSM-5 Terimpregnasi Logam Nikel dan Carbon Nanotube sebagai Katalis dalam Proses Hydrocracking Crude Palm Oil untuk Produksi Biofuel
(Universitas Sumatera Utara, 2025)This study aims to enhance the catalytic performance of HZSM-5 zeolite by incorporating nickel (Ni) via impregnation and adding carbon nanotube (CNT) for the conversion of crude palm oil (CPO) into biofuel. Three catalysts ... -
Pembuatan Edible Coating Berbasis Pati Ubi Kayu Termodifikasi dengan Penambahan Kitosan dan Aloe Vera untuk Mempertahankan Kualitas Tomat
(Universitas Sumatera Utara, 2025)Cassava starch is an abundant natural biopolymer with great potential as a base material for edible coatings due to its transparent appearance, odorless nature, and film-forming ability. However, native cassava starch ... -
Efektivitas Sampo Antiketombe Ekstrak Etanol Daun Ciplukan (Physalis angulata L.) Terhadap Pertumbuhan Jamur Pityrosporum ovale
(Universitas Sumatera Utara, 2025)Pityrosporum ovale is a fungal microorganism commonly found on the scalp and is believed to contribute to the formation of dandruff in certain individuals. To overcome the growth of this fungus, ciplukan leaf extract ... -
Sintesis dan Karakterisasi Superabsorben Polimer Berbasis Natrium Karboksimetil Selulosa dan Hidroksietil Metil Selulosa dengan Asam Sitrat Sebagai Agen Ikat Silang
(Universitas Sumatera Utara, 2025)This study investigates the synthesis and characterization of polymer superabsorbents (SAP) based on sodium carboxymethyl cellulose (Na-CMC) and hydroxyethyl methyl cellulose (HEMC). The synthesis of polymer superabsorbents ... -
Sintesis Metil Oleat dari Asam Oleat dan Metanol pada Variasi Rasio Mol dan Kecepatan Pengadukan Homogenizer Menggunakan Katalis CaO/Zeolit
(Universitas Sumatera Utara, 2025)Synthesis of methyl oleate from the reaction of esterification reaction between oleic acid and methanol catalyzed by CaO/Zeolite catalyst using a homogenizer device. The CaO/Zeolite catalyst was made through the process ... -
Pembuatan Karbon Aktif Daun Nanas (Ananas Comosus) Sebagai Adsorben Terhadap Penurunan Kadar Logam Mangan (Mn) pada Air Sumur Bor
(Universitas Sumatera Utara, 2025)Clean water is essential for human life, but heavy metal contamination from industrial activities poses a serious problem for water sources, including borehole water. In Mabar Village, Medan Deli District, residents still ... -
Optimasi Hidrodistilasi Minyak Nilam (Pogostemon cablin Benth.) dengan Radiasi Mikrowave serta Uji Aktivitas Antioksidan dan Antimikroba
(Universita Sumatera Utara, 2025-07-22)Hydrodistillation of patchouli oil (Pogostemon cablin Benth.) under microwave radiation and pre-treatment by stirring with a homogenizer has been carried out. The parameters of the ratio of patchouli leaves to distilled ...