Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1-20 of 11051
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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 Biodegradable Foam Dari Powder Kulit Kakao Dan Powder Selulosa Daun Nenas Dengan Penambahan Polivinil Alkohol
(Universitas Sumatera Utara, 2025)Biodegradable foam was made and characterized from cocoa shell powder and pineapple leaf cellulose powder with the addition of polyvinyl alcohol as an environmentally friendly alternative to packaging using the baking ... -
Tingkat Kepekaan Staphylococcus sp. Isolat Lalat Rumah (Musca domestica L.) Sekitar Rumah Sakit terhadap Beberapa Jenis Antibiotik
(Universitas Sumatera Utara, 2025)Houseflies (Musca domestica L.) are vector that carry disease-causing agents microorganisms from one environment to the others. The presence of houseflies at the hospital environment is likely to carry pathogenic bacteria ... -
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 ... -
Model Perencanaan Pemeliharaan Tanaman Berbasis Smart Farming
(Universitas Sumatera Utara, 2024)Operational planning in agricultural production systems plays a vital role in facilitating farmers decision-making process. This study introduces a novel mathematical model aimed at optimizing crop maintenance planning ... -
Analisis Regresi Linier Berganda dengan Faktor-Faktor yang Mempengaruhi Tingkat Kemiskinan di Provinsi Sumatera Utara Tahun 2021-2023
(Universitas Sumatera Utara, 2025)Poverty is one of the sources of problems that indirectly affects development and represents an economic inability to meet the minimum standard of living within a community in a certain region. This condition is caused by ... -
Perbandingan Metode Weighted Least Squares
(Universitas Sumatera Utara, 2025)In multiple linear regression analysis using the Ordinary Least Squares (OLS) method as the parameter estimator, that the resulting regression coefficient estimthere are assumptions that must be met so ates are Best Linear ... -
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 ... -
Klasifikasi Curah Hujan Pengaruh Fenomena Indian Ocean Dipole (IOD) dan Madden Julian Oscillation (MJO) Berbasis Machine Learning Wilayah Deli Serdang
(Universitas Sumatera Utara, 2025)Rainfall in the Deli Serdang region is influenced by global climate phenomena. This study aims to determine the classification of rainfall based on machine learning with the SVM model due to the simultaneous occurrence of ... -
Pengendalian Persediaan Dengan Metode Economic Order Quantity Guna Optimalisasi Persediaan Bahan Baku Penunjang Panel APP PL (Studi Kasus: PT. Rahmat Kurnia Abadi)
(Universitas Sumatera Utara, 2025)This research aims to provide an overview of LPG raw material inventory control carried out by PT. Rahmat Kurnia Abadi and to find out the optimal number of orders for LPG raw materials, order frequency, amount of safety ... -
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 ... -
Pembuatan dan Analisis Resin Komposit Sebagai Bahan Tambal Gigi Berbasis Urethane Dimethacrylate (UDMA) dan Triethylene Glycol Dimethacrylate (TEG-DMA) dengan Fotoinisiator Comphorquinone (CQ) dan Trimethylbenzoyl Phosphine Oxide (TPO)
(Universitas Sumatera Utara, 2024)In this work, urethane dimethacrylate (UDMA) was used as dental resin as an non-toxic alternative to Bisphenol A-glycidyl methacrylate (Bis-GMA). Additionally, UDMA combine with triethylene glycol dimethacrylate ... -
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) ... -
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 ... -
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 ... -
Kemampuan Bakteri Endofit Tumbuhan Mangrove Avicennia marina dalam Menghambat Serangan Penyakit Layu Fusarium pada Tanaman Cabai
(Universitas Sumatera Utara, 2025)Mangroves are known to have special abilities to adapt and grow in extreme environmental conditions. Mangroves have been reported to harbor endophytic bacteria that have potential as biological control agents. Additionally, ... -
Kajian Pemberian Limbah Cair Pabrik Kelapa Sawit pada Areal Tanaman Buah Naga terhadap Keanekaragaman Makrofauna Tanah
(Universitas Sumatera Utara, 2025)The application of palm oil mill effluent (POME) on dragon fruit plant areas as fertilizer with variations in the application time will affect the presence and diversity of soil macrofauna, which in turn can reflect the ... -
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 ...