Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 81-100 of 11412
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Perancangan dan Aplikasi Sistem Aerator Otomatis Tenaga Surya Berbasis Internet of Things pada Budidaya Ikan Air Tawar
(Universitas Sumatera Utara, 2025)This study presented the development of an automatic aerator system based on the Internet of Things (IoT) and powered by solar energy, which was designed to improve water quality in freshwater aquaculture. The system ... -
Analisis Pengaruh Suhu terhadap Kinerja Sensor Optik pada Alat Pendeteksi Mikroplastik Berbasis IoT: Studi pada Sungai Deli Medan
(Universitas Sumatera Utara, 2025)Water temperature plays a crucial role in influencing the physical properties of microplastics in aquatic ecosystems. This research investigates how temperature fluctuations affect the response of optical sensors in an ... -
Perancangan dan Pembuatan Alat Pendeteksi Mikroplastik Berbasis IoT Menggunakan Sensor Optik Photodioda BPW34
(Universitas Sumatera Utara, 2025)Microplastics are plastic particles smaller than 5 mm that have become one of the main pollutants in water bodies. The Deli River in Medan City is one of the areas affected due to high domestic waste and poor waste management. ... -
Rancang Bangun Peralatan Sistem Informasi Cuaca Terintegrasi Website Berbasis Internet of Things Menggunakan Esp32 di Daerah Objek Wisata Pantai Bali Lestari
(Universitas Sumatera Utara, 2025)This study designs an IoT-based weather information system at Pantai Bali Lestari using ESP32 and various sensors to read temperature, humidity, air pressure, light intensity, and rain. Data is sent to the server via XAMPP ... -
Pengaruh Suhu Karbonisasi terhadap Karakteristik Adsorben Karbon Aktif Kulit Pisang Kepok untuk Reduksi Salinitas Air Laut
(Universitas Sumatera Utara, 2025)Research on adsorbent based on activated carbon from banana peel to reduce seawater salinity has been conducted. Banana peel was carbonized at 350°C, 400°C, and 450°C for 90 minutes. Banana peel carbon was sieved with a ... -
Pembuatan Karbon Aktif dari Tongkol Jagung dengan Aktivator Asam Sulfat (H2SO4) untuk Penyerapan Logam Mangan (Mn) pada Air Sumur Bor
(Universitas Sumatera Utara, 2025)The increase in industrial development often results in waste, chemicals, or leaks from factory infrastructure that have the potential to contaminate groundwater and compromise the quality of water from bore wells. In ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Batang Tumbuhan Ceremai (Phyllanthus acidus (L.) Skeels)
(Universitas Sumatera Utara, 2025)The cherry plant (Phyllanthus acidus (L.) Skeels) is one of the herbs that has the potential as a medicine. One of the bioactive compounds that plays a role in this is flavonoids. Isolation and identification of flavonoid ... -
Studi Pengaruh Konsentrasi Na-CMC pada Karakteristik Fisikokimia dan Elektrokimia Elektroda Hibrida CNT/NiCo2O4 sebagai Material Superkapasitor Fleksibel
(Universitas Sumatera Utara, 2025)The demand for flexible and environmentally friendly energy storage devices continues to grow alongside the development of wearable electronics. Supercapacitors have emerged as one of the most promising candidates due to ... -
Sintesis Fe3O4/ZIF-8 dari Pasir Besi untuk Adsorpsi Logam Pb(II): Studi Pengaruh Variasi pH Larutan terhadap Kapasitas Penyerapan Adsorben
(Universitas Sumatera Utara, 2025)The rapid rate of population growth is accompanied by the intensification of human activities, especially in the industrial sector. Increased industrial activity leads to high production of toxic pollutants that can ... -
Analisis Kinerja Metode Fuzzy Mamdani dalam Meramalkan Intensitas Curah Hujan di Kota Medan
(Universitas Sumatera Utara, 2025)Indonesia is a tropical country with two main seasons, namely the dry season and the rainy season. Rainfall in a region is influenced by various meteorological factors such as air temperature, humidity, duration of sunshine, ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Kulit Buah Kaliandra Merah (Calliandra houstoniana var. calothyrsus (Meisn.) Barneby)
(Universitas Sumatera Utara, 2025)Red calliandra plant (Calliandra houstoniana var. calothyrsus (Meisn.) Barneby) was a plant that had many benefits, one of which was used as a herbal medicine. One of the bioactive compounds that played a role in this was ... -
Model Multi-Objektif Transportasi Umum dengan Adanya Transfer
(Universitas Sumatera Utara, 2017)An important element in the process of public transportation planning is the development of the concept of a path, so far the model in this study aims to minimize the cost as well as the number of transfers in public ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Jeruk Nipis (Citrus aurantiifolia (Christm.) Swingle)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compounds from Lime Leaves (Citrus aurantiifolia (Christm.)Swingle) has been carried out through the maceration extraction stage with methanol solvent. The methanol extract dissolved ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Buah Jambu Leci (Psidium cattelainum Sabine)
(Universitas Sumatera Utara, 2025)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 2-Etilheksil Dekanoat dari Esterifikasi 2-Etilheksanol dan Asam Dekanoat pada Perbandingan Waktu Reaksi dan Kekuatan Mikrowave Menggunakan Katalis Enzim Lipase
(Universitas Sumatera Utara, 2025)Synthesis of 2-Etilhexyl Decanoate from decanoic acid and 2-ethylhexanol by esterification reaction with lipase enzyme catalyst using microwave has been conducted. The parameters studied in this study were the effect ... -
Isolasi dan Identifikasi Golongan Senyawa Flavonoida dari Daun Iriancis (Impatiens hawkeri W.Bull)
(Universitas Sumatera Utara, 2025)Isolation and identification of flavonoid compounds from the leaves of the Iriancis (Impatiens hawkeri W.Bull) have been carried out through the maceration extraction stage with methanol solvent. Concentrated methanol ... -
Perubahan Morfologi dari Modifikasi Liquid Natural Rubber - Aspal Menggunakan Emulsifier Triton X - 114
(Universitas Sumatera Utara, 2025)Research has been done on polymer asphalt modification, where asphalt is mixed with Liquid Natural Rubber (LNR) from a mixture of Triton X – 114 and phenylhidrazine. Where the preparation and characterization of Liquid ... -
Sintesis Butil Dekanoat dari Esterifikasi Butanol dan Asam Dekanoat pada Perbandingan Rasio Mol dan Berat Enzim Lipase Menggunakan Radiasi Mikrowave
(Universitas Sumatera Utara, 2025)The synthesis of butyl decanoate from esterification reaction of decanoic acid and butanol using microwave radiation with lipase enzyme as catalyst has been conducted. The parameters investigated in this study were the ... -
Sintesis Carbon Dots dan Nitrogen-Doped Carbon Dots Berbasis Cangkang Kemiri (Aleuritas moluccana) sebagai Bioimaging Candida albicans
(Universitas Sumatera Utara, 2025)Carbon dots (CDs) are fluorescent nanomaterials with particle diameters below 10 nm that can be synthesized from biomass. Candlenut shells are lignocellulosic biomass waste with potential as precursors for CDs synthesis ... -
Potensi Nanopartikel Pati Sukun (Artocarpus altilis) Terasetilasi Sebagai Matriks Enkapsulasi Doksorubisin Hidroklorida
(Universitas Sumatera Utara, 2025)Breadfruit starch (Artocarpus altilis) is a natural biopolymer with promising potential as a matrix for drug encapsulation. This study aimed to synthesize and chemically modify breadfruit starch nanoparticles via acid ...