Department of Chemistry: Recent submissions
Now showing items 61-80 of 3029
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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 ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Andromeda Jepang (Pieris Japonica (Thunb.) D.Don Ex G.Don)
(Universitas Sumatera Utara, 2025)The isolation and identification of flavonoid compounds from the bark of Japanese andromeda (Pieris japonica (Thunb.) D.Don ex G.Don) had been carried out. The isolation was conducted through maceration extraction using ... -
Aplikasi Edible Coating dari Pektin Kulit Jeruk Manis dengan Isolat Protein Ikan Teri Terhadap Kualitas Buah Anggur Hijau Muscat
(Universitas Sumatera Utara, 2025)Pectin is a natural polysaccharide compound that has the potential as a basic ingredient for environmentally friendly gelling agents, thus playing a role in reducing the impact of environmental pollution due to synthetic ... -
Sintesis Metil Oleat Dari Asam Oleat dan Metanol pada Variasi Waktu Reaksi dan Konsentrasi Katalis CaO/Zeolit Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025)Synthesis of methyl oleate from esterification reaction between oleic acid and methanol catalyzed by CaO/Zeolite using a homogenizer device at room temperature was carried out at different variations, namely catalyst ... -
Penentuan Kadar Besi (Fe) dan Tembaga (Cu) pada Air Sumur Bor Sebelum dan Sesudah Penyaringan Menggunakan Tabung Penyaring FRP (Fiberglass Reinforced Plastic)
(Universitas Sumatera Utara, 2025)Groundwater in several areas still contains heavy metals and has a physical quality that does not meet drinking water quality standards, so effective filtering efforts are needed. One method used is the application of a ... -
Pengaruh Elektrolit Amonium Klorida Terhadap Kinerja Elektroda Grafena Berlapis Nano dari Cangkang Kemiri (Aleurites moluccana (L.) Willd) Pada Katoda Baterai Primer
(Universitas Sumatera Utara, 2025)Research on the Effect of Ammonium Chloride Electrolyte on the Performance of Graphene Nano Sheets Electrode from Candlenut Shell (Aleurites moluccana (L.) Willd) on Primary Battery Cathode has been conducted. The purpose ... -
Sintesis Dan Karakterisasi Nanokomposit Fe₃O₄/Nitrogen-Doped Carbon Dots (N-CDs) Dengan Metode Sonikasi
(Universitas Sumatera Utara, 2025)Nitrogen-Doped Carbon Dots (N-CDs), which are water-soluble, tend to be difficult to separate from the aqueous phase. To overcome this issue, Fe₃O₄ is used as a nanocomposite-forming material due to its magnetic properties, ... -
Pembuatan dan Karakterisasi Termoplastik Elastomer dari Paduan EPDM/Polipropilena dengan Pengisi Serbuk Tanah Liat sebagai Peredam Benturan Pintu Kendaraan
(Universitas Sumatera Utara, 2025)The increase in the number of vehicles in Indonesia creates opportunities for the rubber component industry, including weather strips for car doors. This study aims to produce a blend of EPDM and polypropylene with ... -
Sintesis dan Karakterisasi Paduan LDPE/EPDM dengan Bahan Pengisi Serbuk Tanah Liat sebagai Peredam Benturan Pintu Kendaraan
(Univesitas Sumatera Utara, 2025)A composite study was conducted using a blend of LDPE/EPDM with the addition of clay powder as a filler, applied as an impact absorber for vehicle door seals. The manufacturing process involved mixing LDPE plastic with ... -
Sintesis Fe3O4/ZIF-8 dari Pasir Besi sebagai Adsorben Logam Berat Pb(II): Studi Efektivitas Adsorpsi terhadap Waktu Kontak
(Universitas Sumatera Utara, 2025-07-21)The rapid industrialization and urbanization have increased environmental pollution, particularly by toxic heavy metals like Pb(II), which pose serious health risks. WHO reports that Pb(II) exposure causes over 1.5 million ... -
Studi Sifat Bioaktif dan Fungsional Kombucha dengan Goji Berry (Lycium barbarum ) Aktivitas Antioksidan, Antimikroba dan Uji Toksisitas
(Universitas Sumatera Utara, 2025)The bioactive and functional properties of Goji berry (Lycium barbarum) kombucha, including its antioxidant, antimicrobial, and toxicity profiles, have been examined. This study aimed to evaluate how the addition of Goji ... -
Analisis Pupuk Anorganik Cair Dengan Penambahan Asam Amino Terhadap Pertumbuhan Sawi Hijau (Brassica juncea L.)
(Universitas Sumatera Utara, 2025)Analysis of liquid inorganic fertilizer with the addition of amino acids on the growth of mustard greens (Brassica juncea L.) has been conducted. This study aims to analyze the effect of variations in the addition of amino ...