Browsing Undergraduate Theses by Issue Date
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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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Impregnasi Fe/Ni Pada Mesopori Silika Template Metil Ester Risinoleat Sebagai Adsorben Cr6+ Dengan Variasi Penambahan Massa Fe
(Universitas Sumatera Utara, 2025)Chromium, especially Cr6+, is a heavy metal that is often used in industry can pollute the aquatic environment, and has high toxicity for humans, therefore, Cr6+ must be removed from the aquatic environment. Mesoporous ... -
Sintesis Basa Schiff Pati Dialdehid dari Buah Sukun (Artocarpus Altilis) Menggunakan Metode Mikrowave Serta Potensinya sebagai Antibakteri
(Universitas Sumatera Utara, 2025)Schiff's base was synthesized through a condensation reaction between dialdehyde breadfruit starch (PD) and ethylenediamine, where PD was obtained from starch oxidation using sodium periodate oxidizer. The formation of ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Kacangan MB (Mucuna bracteata DC. ex Kurz)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compounds from the leaves of MB beans (M. bracteata DC. ex Kurz) had been carried out through maceration extraction with methanol solvent. The methanol extracted was concentrated, ... -
Pembuatan dan Karakterisasi Superabsorben Polimer Berbasis Natrium Karboksimetil Selulosa dan Hidroksietil Metil Selulosa Menggunakan Asam Suksinat sebagai Agen Ikat Silang
(Universitas Sumatera Utara, 2025)This study examines the preparation of polymer superabsorbent from sodium carboxymethyl cellulose (Na-CMC) and hydroxyethyl methyl cellulose (HEMC) with succinic acid crosslinking agent. The preparation of polymer ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Cemara Angin (Casuarina cunninghamiana Miq.)
(Universitas Sumatera Utara, 2025)The isolation and identification of flavonoid compounds from the bark of Casuarina cunninghamiana Miq. have been carried out through several stages, beginning with maceration extraction using methanol as the solvent, ... -
Penentuan Konsentrasi Logam Timbal, Kadmium, dan Seng pada Road Dust Suspension-Resuspension di Sekitar Dalam dan Luar Kawasan Industri Medan (KIM)
(Universitas Sumatera Utara, 2025)A study was conducted to analyze and compare the concentration of heavy metals Lead, Cadmium, and Zinc in Road Dust Suspension-Resuspension (RDS-R) around the inside and outside of the Medan Industrial Area (KIM). Road ... -
Analisis Konsentrasi Logam Tembaga, Arsenik, dan Seng dalam Total Suspended Solid dari Road Dust Suspension–Resuspension di Kecamatan Medan Marelan
(Universitas Sumatera Utara, 2025)The development of transportation will result in exhaust gas or road dust which is very dangerous for public health and also the environment. This study was conducted to identify the concentration of metals in Total Suspended ...