Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 301-320 of 11449
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Food Of Long Tailed Monkey (Macaca fascicularis) In Sicanang Mangrove Ecosistem Based On The Knowledge Of Local Fisherman
(Universitas Sumatera Utara, 2025)This study aims to determine and to analyze the food feeded by long tailed monkey (Macaca fascicularis) in Sicanang mangrove ecosystem. The study was based on the knowledge of local fishermen. A qualitative data was obtained ... -
Identifikasi Jenis dan Prevalensi Endoparasit Gastrointestinal pada Gajah Sumatera (Elephas maximus sumatranus) di Taman Nasional Gunung Leuser Resor Tangkahan
(Universitas Sumatera Utara, 2025)The population of sumatran elephants (Elephas maximus sumatranus) continues to face significant threats due to limited human knowledge of their behavior in the wild and the growing number of disturbances. One contributing ... -
Pengaruh Pemberian Ekstrak Jamur Tiram (Pleurotus ostreatus) Terhadap Morfologi Dan Histologi Hati Tikus (Rattus norvegicus L.) Jantan Diberi Pakan Tinggi Lemak.
(Universitas Sumatera Utara, 2025)High-fat diet can cause hyperlipidemia which causes to liver damage risk. This study aims to analyze the effect of oyster mushroom (Pleurotus ostreatus) extract on liver morphology and histology as well as liver enzyme ... -
Implikasi Penggunaan Ekstrak Jamur Tiram (Pleurotus ostreatus) Sebagai Antihiperlipid Terhadap Histologi Testis Pada Tikus (Rattus norvegicus)
(Universitas Sumatera Utara, 2025)Animal testes with hyperlipidemia will affect the number of Leydig cells and spermatogenic cells, namely spermatogonia, primary spermatocytes and spermatids. Oyster mushroom extract (Pleurotus ostreatus) contains bioactive ... -
Potensi Jamur Sedimen Kawasan Hutan Mangrove Belawan Dalam Mendegradasi Plastik Jenis Low Density Polyethylene (LDPE)
(Universitas Sumatera Utara, 2025)LDPE is a widely used type of plastic due to its low cost and versatility; however, its resistance to degradation has led to serious environmental accumulation issues. This study aims to determine the potential of fungi ... -
Potensi Bakteri Sedimen Kawasan Hutan Mangrove Belawan dalam Mendegradasi Plastik Jenis Low Density Polyethylene (LDPE)
(Universitas Sumatera Utara, 2025)The accumulation of non-biodegradable plastic waste has led to significant environmental concerns, particularly in the mangrove forest of Belawan, North Sumatra. The objective of this study is to ascertain the biodegradation ... -
Keanekaragaman Plankton di Sungai Wampu Tanjung Pura Kabupaten Langkat, Sumatera Utara
(Universitas Sumatera Utara, 2025)Wampu River has abundant natural resources located at Langkat Regency, North Sumatra Province. There are activities surrounding the river that cause changes in the physical-chemical factors of the waters which affects to ... -
Makrozoobentos Sebagai Bioindikator Kualitas Air di Sungai Belawan
(Universitas Sumatera Utara, 2025)This study aims to analyze macrozoobenthos as bioindicators of water quality in Belawan River, Medan City. Belawan River is one of the main rivers that crosses residential, industrial, and aquaculture areas, so it is ... -
Analisis Kandungan Logam Berat Kadmium (Cd) dan Timbal (Pb) pada Kerang Bulu Anadara antiquata Di Perairan Pantai Mangrove, Kabupaten Serdang Bedagai, Sumatera Utara
(Univeritas Sumatera Utara, 2025)Mangrove Beach is one of the beaches with great natural potential and is located in Serdang Bedagai Regency, North Sumatra. The waters of Mangrove Beach are widely used for various community activities that have the ... -
Analisis Perbandingan Metode Mamdani Fuzzy Inference System dengan Regresi Berganda dalam Estimasi Konsumsi Energi Listrik di Provinsi Sumatera Utara
(Universitas Sumatera Utara, 2025)The continuously increasing demand for electricity presents a significant challenge in energy supply, particularly because electricity cannot be stored on a large scale. Therefore, accurate estimation methods are ... -
Analisis Sensitivitas Model Fuzzy Goal Programming dalam Optimisasi Laporan Keuangan PT Kereta Api Indonesia (Persero)
(Universitas Sumatera Utara, 2025)Financial statements are an important tool for assessing a company's performance and future prospects. In the transportation sector, particularly PT Kereta Api Indonesia (Persero), optimizing financial statements is crucial ... -
Hubungan Nutrien Amonia (NH3), Nitrat (NO3) Dan Fosfat (PO4) Terhadap Keanekaragaman Fitoplankton di Sungai Belawan
(Universitas Sumatera Utara, 2025)Sungai Belawan is one of the rivers located in Deli Serdang Regency and Medan City, North Sumatra, Indonesia. The diversity of phytoplankton and the nutrient content of ammonia, phosphate, and nitrate affect the water ... -
Analisis Keanekaragaman Ikan Di Sekitar Keramba dan Non Keramba Jaring Apung Di Danau Toba, Kecamatan Pangururan, Kabupaten Samosir, Sumatera Utara
(Universitas Sumatera Utara, 2025)This study aims to analyze the diversity of fish species and environmental factors that affect on fish at different ecosystems. The diversity of fish at of floating (KJA) and non- floating net in Toba Lake, Pangururan ... -
Kepadatan Populasi Ikan Oskar (Amphilophus citrinellus) di Danau Toba, Kecamatan Simanindo, Kabupaten Samosir
(Universitas Sumatera Utara, 2025)Oskar fish (Amphilophus citrinellus) is an introduced species known that aggressive behaviour, high adaptability, and reproductive potential. Its population tended to increase in Toba Lake, particularly in Simanindo District ... -
Makrofauna Tanah sebagai Spesies Bioindikator pada Areal Tanaman Jagung (Zea mays) yang Diberi Limbah Cair Pabrik Kelapa Sawit sebagai Pupuk
(Universitas Sumatera Utara, 2025)Soil macrofauna are soil animals that live the surface at in the soil that have a body length of biggh than 2 mm. This research was conducted in corn area Samosir Regency. The material used was palm oil mill effluent as ... -
Keanekaragaman Ikan dan Hubungannya dengan Faktor Fisik-Kimia Air di Danau Toba, Kecamatan Pangururan, Kabupaten Samosir, Sumatera Utara
(Universitas Sumatera Utara, 2025)Fish diversity is an important indicator in assessing the health of aquatic ecosystems. The ecosystem reflects the balance between species and environmental conditions. Toba Lake is the largest volcanic lake in Southeast ... -
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 ... -
Sistem Pengontrolan Pemberian Pakan Dan Kualitas Air Kolam Budidaya Ikan Nila Berbasis Iot
(Universitas Sumatera Utara, 2025)Tilapia fish farming is highly dependent on water quality and timely feeding. This research aims to design and implement an automated Internet of Things (IoT)-based system capable of controlling pond water quality and ... -
Implementasi Metode Fuzzy Mamdani dan Fuzzy Tsukamoto dalam Penentuan Durasi Fase Lampu Lalu Lintas di Persimpangan Jalan Kota Medan
(Universitas Sumatera Utara, 2025)The triple intersection of Jalan Jamin Ginting and Jalan Dr. Mansyur in Medan City frequently experiences congestion due to the use of static-duration traffic lights, which fail to account for variations in vehicle density ... -
Pemanfaatan Sekam Padi dan Pasir Besi Alam Sebagai Material Penyerap Dengan Metode Solid State Reaction
(Universitas Sumatera Utara, 2025)The synthesis and characterization of rice husk and natural iron sand as microwave absorbing materials have been successfully carried out. This research was conducted using the Solid State Reaction Method, where the ...