Faculty of Mathematics and Natural Sciences: Recent submissions
Now showing items 1061-1080 of 11354
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Analisis Morfologi, Kristalinitas dan Rendemen Grafena Berlapis Nano dari Tongkol Jagung (Zea mays L.)
(Universitas Sumatera Utara, 2023)Research on the analysis of morphology, crystallinity and yield of graphene nano sheets from corn cobs as a starting material using the pyrolysis method has been carried out. The use of corn cobs in this study is because ... -
Sintesis Selulosa Sulfat dari Tandan Kosong Kelapa Sawit Melalui Reaksi Sulfasi Pada Variasi Mol Asam Sulfamat : Urea Menggunakan Pelarut DMSO
(Universitas Sumatera Utara, 2023)Isolation of α-cellulose was carried out with the addition of 3.5% HNO3, 2% NaOH and Na2SO3, 1.75% NaOCl, 17.5% NaOH and 10% H2O2, α-cellulose was obtained as much as 18.167 g (24.22% of the initial weight). Preparation ... -
Keanekaragaman Makrofauna Tanah Pada Areal Rerumputan dan Semak yang tidak dan Diberi Limbah Cair Pabrik Kelapa Sawit Sebagai Pupuk
(Universitas Sumatera Utara, 2023)The role of soil macrofauna is to maintain soil fertility through the breakdown of the organic matter, the distribution of nutrients, the increasing aeration and the soil drainage. This research was conducted to determine ... -
Sulfonasi Minyak Jarak Kepyar (Ricinus Communis Linn) dan Senyawa Poliol Hasil Epoksidasi dari Minyak Jarak Menggunakan SO3
(Universitas Sumatera Utara, 2023)Sulfonation of castor oil (Ricinus communis Linn) and castor oil polyols has been carried out using a SO3 sulfonating agent obtained from the reaction of concentrated sulfuric acid with phosphorus pentaoxide. The value of ... -
Pembuatan dan Karakterisasi Bioplastik Berbahan Dasar Pati Sukun (Artocarpus Altilis) dengan Variasi Penambahan Kitosan dan Sorbitol
(Universitas Sumatera Utara, 2023)Bioplastics are plastics whose raw materials come from nature and can be degraded by the activity of microorganisms, so they do not pollute when discharged into the environment. Starch is the most widely used raw material ... -
Keanekaragaman Makrofauna Tanah Pada Areal Tanaman Rimbang (Solanum Torvum Swartz) yang diberi Limbah Cair Pabrik Kelapa Sawit Sebagai Pupuk
(Universitas Sumatera Utara, 2023)The presence of soil macrofauna at the area of rimbang plants treated with palm oil mill effluent with different application treatments (ponds 5, 6, and 7) indicates the different quality and fertility of the soil. The aim ... -
Hubungan Logam Berat Besi (Fe) dan Tembaga (Cu) terhadap Keanekaragaman Fitoplankton di Sungai Belawan
(Universitas Sumatera Utara, 2023)This research purpose to analyze the relationship between the physical chemical factors of water and the heavy metals Iron (Fe) and Copper (Cu) on the diversity of phytoplankton in the Belawan river, Pancur Batu sub-district, ... -
Makrofauna Tanah Sebagai Spesies Bioindikator Pada Areal Ladang Pisang (Musa Paradisiaca L.) yang diberi Limbah Cair Pabrik Kelapa Sawit
(Universitas Sumatera Utara, 2023)Bioindicators species are soil macrofauna that live and reproduce well. This study aim to analyzed the type, the density, the frequency of presence, the relative density and the bioindicator species of soil macrofauna ... -
Principal Component Analysis (PCA) dalam Melihat Faktor-Faktor Mempengaruhi Perkembangan Ternak Ayam (Studi Kasus: Peternakan Ayam Mutiara Sani, Mitra PT Ciomas Adisatwa, Pekanbaru)
(Universitas Sumatera Utara, 2023)The focus of this observation is to see which factors have the highest variance or can represent the factor data and which most influence broiler development. To obtain the desired information, principal component analysis ... -
Pengukuran Laju Paparan Radiasi dan Efektivitas Perisai Radiasi Pada Ruang Panoramik di RSUD Dr.Pirngadi Kota Medan”
(Universitas Sumatera Utara, 2023)Research has been carried out on measuring the rate of radiation exposure and the effectiveness of radiation shielding in the panoramic room at RSUD DR. Pirngadi, Medan City. This research aims to determine the amount ... -
Penerapan Mppt P&O Pada Wind Turbine dengan Mosfet Sebagai Switching dan Arduino Sebagai Mikrokontrolernya
(Universitas Sumatera Utara, 2023)The 11eedfor electrical e11ergy for ma11ki11d today has a very important role. Along with that, the need for electrical energy is increasing. With the increasing need for electrical energy, an adequate source of electrical ... -
Rancang Bangun Photodetector Dioda Laser dengan Panjang Gelombang 1,3 μm
(Universitas Sumatera Utara, 2023)Recently, photodetectors are essential for various industrial and scientific applications, including optical communication, environmental monitoring, and Medicine delivery, health monitors, power supplies, optoelectronic ... -
Implementasi Steganografi Least Significant Bit (LSB) dengan Algoritma Kriptografi Super Enkripsi pada File Citra
(Universitas Sumatera Utara, 2023)Cryptography is a method to keep messages by converting them into codes. But, cryptographic results often raise suspicion. Therefore, steganography is needed to hide the message its existence is not known. Steganography ... -
“Implementasi Metode Holt-Winters Exponential Smoothing dan Triple Exponential Smoothing dalam Memprediksi Harga Emas Berjangka.
(Universitas Sumatera Utara, 2023)Gold is one of the goods that is much favored by investors, this is because gold has advantages when compared to other assets. Gold investment is a type of investment that tends to be safer and more profitable than other ... -
Analisis Varian Pengaruh Suhu dan Konsentrasi terhadap Perubahan Konduktivitas Larutan Asam Asetat (CH3COOH) dan Asam Klorida (HCl)
(Universitas Sumatera Utara, 2023)The investigation about the influence of temperature and concentration on the change of conductivity of electrolyte solution has been performed.The type of utilized electrolyte solution was strong electrolyte of acid ... -
Covariance Based Structural Equation Modeling dalam Analisis Hubungan Penyesuaian Diri terhadap Culture Shock Mahasiswa Pasca Pandemi Covid-19
(Universitas Sumatera Utara, 2023)Structural Equation Modeling (SEM) is a multivariate statistical analysis that can analyze causal relationships between indicator variables and latent variables, and also relationships between latent variables. In this ... -
Modifikasi Pati Sukun (A Rtocarpus Altilis) Menjadi Pati Ikat Silang Sitrat
(Universitas Sumatera Utara, 2023)Modification of breadfruir starch citric was carried out through a cross-linking reaction between breadfruit starch (Artocarpus altilis) and citric acid. This research was conducted in two stages, na,nely isolation of ... -
lmplemntasi Current source Pada wind Turbine Unluk menyalakan Beban Tanpa media
(Universitas Sumatera Utara, 2023)To deal the with increasing needs of life and the reduction of fossil fuels and increasing human resource in the future, it is necessary to produce more electrical energy In addition, the burning of fossil fuels causes the ... -
Modifikasi Limbah Plas1ik Polipropilena yang Te rgrafting Maleat Anhidrida dengan Aspal
(Universitas Sumatera Utara, 2023)This research discusses the JJrocess of modifying polymer asphalt with polypropylene ( PP) plastic waste which is carried out in three stages. The first stage is PP purification, by dissolving the polypropylene -i,vaste ... -
Rancangan Bangun alat ukur daya listrik sistem kontrol dan deteksi on/off berbasis IoT
(Universitas Sumatera Utara, 2023)This study aims to design and implement a circuit that functions to determine the amount of electricity consumption, current, voltage as well as controlling the distance of the remote lamp and detecting the on/off lights. ...