Browsing Department of Chemistry by Issue Date
Now showing items 1-20 of 2998
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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 ... -
Efektivitas Sampo Antiketombe Ekstrak Etanol Daun Ciplukan (Physalis angulata L.) Terhadap Pertumbuhan Jamur Pityrosporum ovale
(Universitas Sumatera Utara, 2025-07-22)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 ... -
Modifikasi Pati Ubi Jalar Putih Melalui Reaksi Oksidasi Menggunakan Natrium Hipoklorit
(Universitas Sumatera Utara, 2025-07-22)Modification of white sweet potato starch were carried out through an oxidation reaction between white sweet potato starch (Ipomoea Batatas Linneaus) and sodium hypochlorite (NaOCl). This research was conducted in two ... -
Sintesis Dan Karakterisasi Hidroksiapatit Dari Limbah Cangkang Keong Mas Melalui Analisa Komposisi Kimia Dan Morfologi
(Universitas Sumatera Utara, 2025-07-21)The synthesis of hydroxyapatite (HAp) from golden apple snail shells (Pomacea canaliculata) has been carried out using the wet precipitation method. This study aims to evaluate the effect of varying calcium oxide (CaO) ... -
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 ... -
Pengaruh Variasi Waktu Aging terhadap Morfologi Hidroksiapatit Hasil Sintesis dari Cangkang Telur Bebek (Anas platyrhynchos domesticus) melalui Metode Pengendapan Basah
(Universitas Sumatera Utara, 2025-07-21)Hydroxyapatite (HAp) was successfully synthesized from duck eggshells using the wet precipitation method with aging time variations of 12, 24, and 36 hours. This study aimed to evaluate the effect of aging time on the ... -
Aktivitas Antioksidan dan Antimikroba Minyak Nilam (Pogostemon cablin Benth.) dari Hidrodistilasi Menggunakan Radiasi Mikrowave dan Pra-Perlakuan Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025-07-17)A combination of homogenizer-assisted cell disruption and microwave-assisted hydrodistillation was conducted to extract patchouli oil (Pogostemon cablin Benth.). This study investigated the effect of stirring time (5, 10, ... -
Efektivitas Bioadsorben dari Limbah Kulit Durian Teraktivasi Asam Fosfat (H3PO4 ) dalam Penurunan Kadar Logam Besi (Fe) pada Air Sumur Gali
(Universitas Sumatera Utara, 2025-07-17)The levels of iron (Fe) metal can be reduced by adsorption in water using durian skin waste adsorbent containing cellulose as the basic material for making activated carbon. This study aims to determine how to make activated ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida Dari Buah Jambu Leci (Psidium cattelainum Sabine)
(Universitas Sumatera Utara, 2025-07-17)Flavonoid compounds were isolated and identified from the fruit of the guava (Psidium Cattleianum Sabine). The isolation process involved methanol solvent maceration extraction until a negative FeCl3% was obtained. This ... -
Sintesis Biopelumas Ester dari Minyak Goreng Bekas dan Pentaeritritol Menggunakan Green Catalyst/Solvent dan Optimasinya dengan Desain Box-Behnken
(Universitas Sumatera Utara, 2025-07-11)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 Karbon Dots (CDs) Emisi Ganda Menggunakan Metode Hidrotermal dengan Penambahan Etilendiamin Sebagai Agen Pasivasi
(Universitas Sumatera Utara, 2025)Carbon dots are carbon nanoparticles with sp2/sp3 hybridization structures that exhibit single or dual emission during fluorescence phenomena. Dual-emission carbon dots offer advantageous excitation-emission characteristics ... -
Sintesis dan Karakterisasi Reduced Graphene Oxide (RGO) Terdoping Nanopartikel Besi Oksida (Fe2O3) sebagai Eletroda Baterai Primer
(Universitas Sumatera Utara, 2025)A study has been conducted on the Synthesis and Characterization of Reduced Graphene Oxide (RGO) Doped with Iron Oxide (Fe2O3) Nanoparticles as Primary Battery Electrodes. The purpose of this study was to analyze the ... -
Pemanfaatan Zeolit Sintesis dari Limbah Fly Ash Sebagai Adsorben Logam Mangan (Mn) pada Air Sumur Bor di Kawasan Deli Tua
(Universitas Sumatera Utara, 2025)Fly ash waste is a waste that has not received optimal treatment in its utilization until now. Fly Ash has a high Silica (Si) and Aluminum (Al) content so it is suitable to be used as a synthetic zeolite that has an ... -
Formulasi Sediaan Krim Tabir Surya dari Karboksimetil Kitosan dan Penentuan Nilai SPF (Sun Protecting Factor) secara In Vitro
(Universitas Sumatera Utara, 2025)A study has been conducted on the use of carboxymethyl chitosan (KMK) in the formulation of sunscreen cream preparations as a skin protector from excessive sunlight. Sunscreen is a cosmetic ingredient that scatters UV ... -
Pemanfaatan Ekstrak Etanol Mahkota Nanas (Ananas Comosus L. Merr.) sebagai Antioksidan pada Sediaan Moisturizing Gel
(Universitas Sumatera Utara, 2025)Moisturizing gel is one of the treatments that aims to improve dry skin with ingredients contained in cosmetics. Pineapple crown (Ananas comosus L. Merr) is known to contain flavonoid compounds that have the potential to ... -
Penggunaan Nanopartikel Kitosan untuk Enkapsulasi Penghantaran Bahan Aktif pada Sediaan Facial Cleansing
(Universitas Sumatera Utara, 2025)The development of natural science has given birth to various products in the world of cosmetics, for example facial cleansing. Facial cleansing is a beauty product made from surfactants and active ingredients to cleanse ... -
Penurunan Kadar Logam Besi (Fe) Menggunakan Karbon Aktif dari Tongkol Jagung (Zea Mays) sebagai Adsorben dengan Variasi Aktivator Asam Fosfat (H3PO4)
(Universitas Sumatera Utara, 2025)Activated carbon is an amorphous compound produced from materials containing carbon. One of the materials that can be used to make activated carbon is corn cob husks which are still underutilized. This research was conducted ... -
Adsorpsi Logam Pb pada Adsorbent Berbasis Karboksimetil Selulosa dan Hidroksipropil Metil Selulosa dengan Divinil Sulfon sebagai Agen Ikat Silang
(Universitas Sumatera Utara, 2025)This study examines the adsorption process of Pb metal on adsorbents based on carboxymethyl cellulose (CMC) and hydroxypropyl methyl cellulose (HPMC) with divinyl sulfone (DVS) as a crosslinking agent. The adsorbent was ... -
Aplikasi Entomologi Forensik Menggunakan Serangga Air Untuk Menganalisis Kualitas Air Sungai Sebagai Upaya Peningkatan Kesehatan Ekosistem Sungai Dari Cemaran Logam
(Universitas Sumatera Utara, 2025)Forensic Entomology is a science that utilizes insects in identification. Metals are often found in river water polluted by industrial processes. To separate metals from river water, blood clam shells (Anadara granosa) ... -
Analisa Logam Berat Plumbum (Pb) di Lahan Eks-Konsesi Pt TPL Desa Nagasaribu dengan Metode Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES)
(Universitas Sumatera Utara, 2025)This study analyzes the heavy metal Lead (Pb) content in two ex-concession lands with different fertilization and spraying activities. In Land I (last activity in 2020), the highest lead concentration was found at Point ...