Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 621-640 of 11356
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Analisis Variasi Temperatur dan Waktu Pirolisis terhadap Kristalinitas dan Morfologi Grafena Berlapis Nano dari Tongkol Jagung (Zea Mays L.)
(Universitas Sumatera Utara, 2024)Research on the analysis of temperature and pyrolysis time variations on the crystallinity and morphology of graphene nano sheet from corn cob has been carried out. The aims of this research are to analysis the optimum ... -
Efektivitas Kitosan Oligosakarida pada Formulasi Sediaan Lip Gloss sebagai Antioksidan dengan Metode Dpph (2,2-Diphenyl-1-Picrylhydrazyl)
(Universitas Sumatera Utara, 2024)Research has been conducted on the use of chitosan oligosaccharides in the formulation of lip gloss preparations as antioxidants. Lip gloss is a product that gives a glossy effect and shine to the lips, helps increase ... -
Analisis Kualitas Sabun Mandi Cair dengan Penambahan Minyak Daun Eucalyptus Grandis sebagai Agen Antibakteri Staphylococcus Aureus
(Universitas Sumatera Utara, 2024)Soap is one of the most important products in everyday life. The need for soap is increasing year by year, as shown in BPS data from 2016 to 2021. One type of soap is liquid body wash. Liquid body wash has several advantages ... -
Alat Kontrol pH Air Otomatis Pada Budidaya Ikan Air Tawar menggunakan Automatic Sensor Lifter Terintegrasi Internet Of Things (IoT)
(Universitas Sumatera Utara, 2024)The accuracy of water pH measurement results during control and monitoring can determine the optimal water condition of fish ponds for fish growth and health in freshwater fish farming. By automatically controlling the pH ... -
Studi Etnobotani Tumbuhan Obat Masyarakat Batak Toba di Kecamatan Sitiotio Kabupaten Samosir Sumatera Utara
(Universitas Sumatera Utara, 2022)Study of ethnobotany of medicinal plants in the Toba Batak community in Sitiotio District, Samosir Regancy, North Sumatera aims to determine the ultilization, perception, types of medicinal plants and the degradation of ... -
Karakterisasi Termoplastik Low Density Polyethylene (LDPE) dengan Filler Nanosilika Abu Sekam Padi (ASP) yang Disintesis menggunakan Metode Kopresipitasi
(Universitas Sumatera Utara, 2024)LDPE thermoplastics have been made with rice husk ash nanosilica filler which is synthesized using the coprecipitation method. Nanosynthesis of rice husk ash (RHA) silica was carried out with HCl 2M and NaOH 2.5M solvents ... -
Resistensi Bakteri Gram Negatif Penyebab Diare Asal Feses Siamang (Symphalangus Syndactylus) di Sumatran Rescue Alliance (SRA) terhadap Beberapa Antibiotik
(Universitas Sumatera Utara, 2024)Diarrhea is one of the problems that can threaten the lives of gibbons (Symphalangus syndactylus) named Pebro and Kiting at SRA, especially when antibiotics are not effective in curing this disease because both gibbons ... -
Modifikasi Suhu dan Nutrisi terhadap Pertumbuhan Jamur Tiram (Pleurotus Ostreatus)
(Universitas Sumatera Utara, 2024)Oyster mushroom is a food produce rich in protein and nutrition that is accessible to produce and affordable. Mushroom cultivation commonly takes place in environment with moist humidity and cool temperature. Medan has ... -
Potensi Actinomycetes Rhizosfer Etlingera Asal Taman Hutan Raya Bukit Barisan dalam Menghambat Methicillin-Resistant Staphylococcus Aureus (MRSA)
(Universitas Sumatera Utara, 2024)Microorganism resistance to antibiotics requires effort to explore potential microorganisms as antibiotic producers, such as actinomycetes. Actinomycetes isolated from nature are expected to inhibit resistant microorganisms ... -
Pengaruh Variasi ZPT Paclobutrasol dalam Media ½ Murashige dan Skoog (Ms) dan Lama Penyimpanan terhadap Viabilitas Biji Sintetik Chrysanthemum Sp.
(Universitas Sumatera Utara, 2024)The distribution of tissue tubers such as Chrysanthemum sp. often encounters obstacles, especially in the problem of its viability, so the manufacture of synthetic seeds is a solution to overcome the problem. The study ... -
Potensi Ekstrak Daun Sirih Cina (Peperomia Pellucida L.) terhadap Histologi Organ Hati Mencit (Mus Musculus L.) yang Dipapar Asap Rokok
(Universitas Sumatera Utara, 2024)Free raldicalls produlced from cigalrette smoke caln calulse dalmalge to the liver. Liver dalmalge dule to free raldicalls caln be trealted by aldministering alntioxidalnts which coulld be foulnd in the sirih cinal plalnts. ... -
Efek Pemberian Ekstrak Etanol Biji Pinang (Areca Catechu L.) terhadap Morfologi dan Histologi Lambung Tikus (Rattus Norvegicus L.) Jantan yang Diinduksi Aloksan
(Universitas Sumatera Utara, 2024)Areca nut is one of the traditional medicinal plants that has potency as antidiabetics. This study aims to analyze the safety of giving ethanol extract of areca catechu nut (Areca catechu L.) on the gastric morphology and ... -
Analisis Sifat Fisika dan Kimia Grafena Berlapis Nano dari Tempurung Kelapa dan Cangkang Kemiri Pada Berbagai Temperatur Pirolisis dan Massa Bahan Baku
(Universitas Sumatera Utara, 2024)Research on the analysis of the physical and chemical properties of Nano-Coated Graphene (GBN) from coconut shells and candlenut shells using the pyrolysis method has been carried out. The use of coconut shell in this ... -
Keanekaragaman Jenis Liken pada Tegakan Pohon di Kampus Universitas Sumatera Utara Medan
(Universitas Sumatera Utara, 2024)University of North Sumatera has a fairly high diversity of vegetation. The cool temperature of 23℃ and a height of 2.5 – 37.5 meters above sea level does not support many types of lichenes to live in this region. However, ... -
Desalinasi Air Payau dengan Adsorben Berbasis Zeolit Alam Pahae Teraktivasi Fisika
(Universitas Sumatera Utara, 2024)Pahae natural zeolite-based adsorbent for brackish water desalination has been made in order to meet the requirements of clean water quality. Pahae natural zeolite was made with a size of 710μm (25 mesh) then washed with ... -
Penerapan Model Regresi Logistik Biner pada Analisis Faktor yang Mempengaruhi Pengangguran Terbuka di Sumatera Utara
(Universitas Sumatera Utara, 2024)Unemployment is a serious issue in Indonesia, leading to internal inequality and income distribution disparities. North Sumatra is among the ten provinces with the highest unemployment rates in Indonesia. The objective of ... -
Kajian Kestabilan Model PLHR1R2 pada Penyebaran Perilaku Merokok dengan Metode Lyapunov
(Universitas Sumatera Utara, 2024)This research aims to investigate the stability of the spread of smoking behavior model using Lyapunov method analyzed through Lyapunov functions. This study assumes that individuals who have quit smoking can replase at ... -
Optimasi Penjadwalan Shift Kerja Perawat pada Ruang Rawat Inap Menggunakan Program Linear di RSUD Panyabungan
(Universitas Sumatera Utara, 2024)Scheduling is a planning activity to determine when each operation as part of the work as a whole must be carried out with limited resources, as well as allocating resources at a certain time by taking into account the ... -
Optimasi Rute Pengiriman CPO Menggunakan Teknik Program Dinamik
(Universitas Sumatera Utara, 2024)This research aims to optimize the delivery routes of Crude Palm Oil (CPO) using Dynamic Programming technique. Companies in the plantation sector often face efficiency challenges in logistics management, especially in the ... -
Fitting Distribusi pada Waktu Antar Kedatangan Peristiwa Gempa Menggunakan Metode Maksimum Likelihood (Studi Kasus: Gempa Bumi di Sumatera Utara)
(Universitas Sumatera Utara, 2024)Penelitian ini bertujuan untuk fitting distribusi pada waktu antar kedatangan peristiwa gempa di Sumatera Utara menggunakan metode maksimum likelihood. Estimasi parameter merupakan suatu metode untuk mengetahui nilai-nilai ...