Department of Chemistry: Recent submissions
Now showing items 101-120 of 3020
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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 ... -
Karakterisasi Edible Coating dari Nanopartikel Pati Biji Durian dengan Minyak Atsiri Lemon untuk Memperpanjang Masa Simpan Buah Stroberi
(Universitas Sumatera Utara, 2025)Durian is a tropical fruit widely consumed in Indonesia, which generates waste in the form of peels and seeds. Durian seeds have potential to be utilized as a starch source, which can be processed into a base material for ... -
Pembuatan Mi Kering dari Pati Biji Alpukat (Persea americana) Termodifikasi dengan Metode Fermentasi serta Penambahan Tepung Mocaf dan Garam Fosfat
(Universitas Sumatera Utara, 2025)The utilization of avocado seed waste (Persea americana) as a raw material for dried noodle production represents an innovative approach to the development of functional foods based on local resources. This study aimed to ... -
Efektivitas Dan Formulasi Sediaan Moisturizer Berbasis Karboksimetil Kitosan Dengan Penambahan Niacinamide Sebagai Agen Whitening
(2025)Research has been conducted on the use of carboxymethyl chitosan in the formulation of moisturizer preparations as antioxidant. Moisturizer is a product that helps hydrate the skin and can also provide a brightening effect ... -
Sintesis Metil Eugenol Melalui Reaksi Eterifikasi pada Variasi Mol Kalium Karbonat dan Dimetil Karbonat
(Universitas Sumatera Utara, 2025)This study aims to synthesize methyl eugenol through etherification reaction at various moles of potassium carbonate as base and dimethyl carbonate as methyl group donor. The reaction was carried out under reflux conditions ... -
Analisis Kandungan Cr, Mn, Zn Berdasarkan Kelarutan Dalam Air pada Debu Jalan di Jalan Jenderal Besar A.H. Nasution
(Universitas Sumatera Utara, 2025)Road dust can be contaminated with heavy metals from non-exhaust vehicle emission. Rainfall can carry these heavy metals to water bodies and causing pollution that endangers living organism. This research aims to determine ... -
Aktivitas Antioksidan dan Antimikroba Minyak Nilam (Pogostemon cablin Benth.) dari Hidrodistilasi Menggunakan Radiasi Mikrowave dan Pra-Perlakuan Menggunakan Homogenizer
(Universitas Sumatera Utara, 2025)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, ... -
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, ... -
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 ... -
Uji Bioaktivitas Antidiabetes dan Identifikasi Senyawa Fenolik dari Fraksi Etil Asetat Kulit Buah Kembang Merak (Caesalpinia pulcherrima (L.) Sw.)
(Universitas Sumatera Utara, 2025)Peacock flower plant (Caesalpinia pulcherrima (L.) Sw.) is traditionally used in medicine and is thought to be influenced by the presence of secondary metabolites. This study aims to test the antidiabetic bioactivity ... -
Sintesis Nanosilikon Menggunakan Metode Hidrotermal dari Sekam Padi sebagai Anoda Baterai Litium-Ion
(Universitas Sumatera Utara, 2024)The hydrothermal method is a simple synthesis method that utilizes chemical reactions in solution at a temperature of 180 0C Hydrothermal is known to be effective in producing synthesized materials with structures that ... -
Penyediaan Pati Kationik dari Ubi Kayu (Manihot utilissima) dalam Pembuatan Kertas Berkualitas Berbasis Selulosa Bakteri
(Universitas Sumatera Utara, 2024)Cationic starch (CS) is one of the most frequently used additives in the paper industry because it has a low substitution rate and is used as a dry reinforcing agent in paper surface coatings, and can improve the optical ... -
Sintesis Pati Sulfat dari Pati Ubi Kayu (Manihot esculenta) Menggunakan Asam Sulfamat-Urea dalam Pelarut DMSO
(Universitas Sumatera Utara, 2024)This study examines the Synthesis of Sulfate Starch from Cassava Starch (Manihot Esculenta) using Sulfuric Acid-Urea in DMSO Solvent. This research was carried out in two stages, namely, the isolation of cassava starch ... -
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, ... -
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 ... -
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 ... -
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 ... -
Isolasi Senyawa Flavonoid dan aktivitas Antioksidan Ekstrak Etil Asetat Biji Okra (Abelmoschus esculentus L.) sebagai sediaan Formulasi Face Toner.
(Universitas Sumatera Utara, 2025)Okra fruit (Abelmoschus esculentus L.) from the Malvaceae family has seeds that are thought to have flavonoid secondary metabolite compounds and have antioxidant activity that can be utilized as a preparation for face ... -
Uji Aktivitas Antioksidan Dan Isolasi Ekstrak Etil Asetat Daun Jambu Biji Kristal (Psidium guajava L.) Serta Pemanfaatannya Sebagai Sunscreen
(Universitas Sumatera Utara, 2025)Crystal guava plant (P. guajava L.) is one of the species of the Myrtaceae family that has potential allelopathic properties. This study aims to test the antioxidant bioactivity, determine the SPF value of sunscreen ... -
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) ...