Browsing Faculty of Mathematics and Natural Sciences by Issue Date
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Rancang Bangun Sistem Pengujian pada Penentuan Massa dan Tekanan Tabung Gas LPG menggunakan LoadCell Hx711 dan Sensor Tekanan
(Universitas Sumatera Utara, 2025-10-16)The 3-kg Liquefied Petroleum Gas (LPG) cylinder is a widely used household energy source in Indonesia and is classified as a Prepackaged Commodity (BDKT), which mandates strict quantity verification under legal metrology ... -
Integrasi Anemometer dan Kincir Angin 300 Watt dalam Sistem IOT untuk Pemantauan Real-Time Melalui Telegram Berbasis Esp8266
(Universitas Sumatera Utara, 2025-09-19)Optimizing the potential and realizing the utilization of wind energy, such as in the coastal areas of Lake Toba, particularly in Silalahi III Village, requires further adjustments to the use of turbine models, monitoring, ... -
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 ... -
Modifikasi Pati Ubi Jalar Putih (Ipomoea Batatas-Linneaus) melalui Ikat Silang dengan Natrium Tripolifosfat
(Universitas Sumatera Utara, 2025-07-09)Modification of sweet potato starch phosphate has been done through cross-linking reaction between white sweet potato starch (Ipomoea Batatas-Linneaus) with sodium tripolyphosphate (STPP). This research was conducted in ... -
Potensi Bakteri Penghasil Biosurfaktan Dari Limbah Cair Industri Kelapa Sawit Dalam Mendegradasi Minyak Goreng Bekas
(Universitas Sumatera Utara, 2025)The increasing need for cooking oil as a food ingredient has resulted in an increase in the amount of used cooking oil produced, causing pollution which has negative effects on health and the environment. This research ... -
Potensi Jamur Nematofagus (Paecilomyces fumosoroseus) dan Bakteri Penambat Nitrogen (Azotobacter sp.) Dalam Mengurangi Infeksi Meloidogyne hapla Pada Tanaman Tomat (Solanum lycopersicum L.)
(Universitas Sumatera Utara, 2025)Tomato plants (Solanum lycopersicum L.) are horticultural crop that often suffer yield losses due to the root-knot nematode attacks. This study aims to determine the ability of nematophagous fungi (Paecilomyces fumosoroseus) ... -
Potensi Jamur dari Limbah Detergen dalam Mendegradasi Linear Alkylbenzene Sulfonate
(Universitas Sumatera Utara, 2025)Contamination of detergent containing linear alkylbenzene sulfonate (LAS) waste could occur due to the absence of a standard system regarding waste management, especially from laundry businesses. This research aims to ... -
Pola Pertumbuhan dan Faktor Kondisi Ikan Iblis Merah (Amphilopus labiatus) di Perairan Danau Toba Sumatera Utara
(Universitas Sumatera Utara, 2025)The red devil fish (Amphilophus labiatus) is a type of predatory fish that also invasive. It is posing a threat to the endemic fish and other economically important fish species in a body of water. The presence of the red ... -
Skrining Fitokimia dan Uji Aktivitas Antimikroba Ekstrak Metanol Akar Sidaguri (Sida rhombifolia) terhadap Beberapa Bakteri dan Jamur Patogen Manusia
(Universitas Sumatera Utara, 2025)Infections caused by pathogenic microorganisms are generally treated with antibiotics; however, inappropriate of antibiotics use can lead to resistance, in turn other antimicrobial agents need to be develope. Many antimicrobial ... -
Optimalisasi Ekstrak Daun Sirih Cina (Peperomia Pellucida L.) Terhadap Histologi Paru-Paru Mencit (Mus Musculus L.) Yang Dipapar Asap Rokok
(Universitas Sumatera Utara, 2025)Cigarette smoke contains various harmful substances, including free radicals that smoke can lead to oxidative stress, damaging lung cells, increasing the risk of inflammation, and impairing of the lung function. The use ... -
Aktivitas Antioksidan dan Antimikrob dari Estrak Etanol Daun Gagatan Harimau (Paraboea leuserensis B.L.Burtt) terhadap Staphylococcus aureus, Escherichia coli dan Candida albicans
(Universitas Sumatera Utara, 2025)Antioxidant and antimicrobial research of ethanol extract of Gagatan Harimau leaves (Paraboea leuserensis B.L.Burtt) against staphylococcus aureus, Escherichia coli and Candida albicans was conducted in January-April ... -
Sistem Kendali Suhu dan Laju Pemanasan Pirolisis Limbah Plastik Jenis LDPE Berbasis IoT dengan Metode PID Controller
(Universitas Sumatera Utara, 2025)Low Density Polyethylene (LDPE) plastic is a common and widely used material in society, or in industry and the environment. The large number of LDPE plastic waste needs results in environmental problems. One of the processes ... -
Hubungan Umur dengan Berat Feses Gajah Sumatera (Elephas Maximus Sumatranus) di Kawasan Taman Nasional Gunung Leuser Resort Tangkahan, Langkat, Sumatera Utara
(Universitas Sumatera Utara, 2025)This research aims to explain the relationship between age and feces weight of Sumatran elephants (Elephas maximus sumatranus) in the Gunung Leuser National Park Tangkahan (GLNP) Resort, Langkat, North Sumatra. ... -
Studi Etnoprimatologi Kukang (Nycticebus Coucang) di Desa Kuta Male Kecamatan Kutambaru Kabupaten Karo Sumatera Utara
(Universitas Sumatera Utara, 2025)The misuse of slow lorises, such as their use as mystical tools or as pets, is particularly prevalent in Kuta Male Village, Karo Regency, North Sumatra. Therefore, it is necessary to conduct research regarding the perspectives ... -
Gambaran Histologi Testis Mencit (Mus musculus L.) yang Terpapar Asap Rokok dengan Pemberian Ekstrak Daun Sirih Cina (Peperomia pellucida L.)
(Universitas Sumatera Utara, 2025)Chinese betel leaf extract has the potential to omit the free radicals due to its antioxidant activity. The aim of this study was to determine the efficacy of Chinese betel leaf extract on the morphology and histology of ... -
Studi Populasi Ikan Bilih (Mystacoleucus padangensis Bleeker, 1852) di Perairan Danau Toba, Sumatera Utara
(Universitas Sumatera Utara, 2025)Lake Toba has considerable fishery resources with various types of fishes utilized by the community, one of them is bilih fish. Bilih fish (Mystacoleucus padangensis) is an endemic fish of Lake Singkarak which was introduced ... -
Pembuatan Alat Ukur Torsi Statis Motor Penggerak Rotasi dengan Sensor Load Cell Berbasis Nodemcu Esp8266
(Universitas Sumatera Utara, 2025)This research describes the process of designing, making, and testing a static torque measuring instrument for rotational drive motors based on NodeMCU ESP8266. Static torque measurement on a rotational motor is an important ...