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Yulianis
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Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Medicine & Pharmacology Physics Public Health Social Sciences

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Increasing The Effectiveness Of 20 WP Solar Panel Power Absorption Using Three Angle Variations Based On The Effect Of Temperature Changes In Padang City Yulianis; Mairizwan; Yulkifli
Journal of Climate Change Society Vol. 1 No. 2 (2023)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jccs/Vol1-iss2/15

Abstract

In this paper, a system has been successfully designed to measure the effectiveness of solar panel power absorption with three variations in location and temperature changes in the city of Padang. The performance specifications for this system use three 20-watt solar panels with varying angles of 50°, 65°, and 75°. Use of the INA219 sensor, DS18B20 sensor, and BH1750 sensor, which measure power, temperature, and light intensity parameters. The system uses a Bluetooth serial terminal as a data logger and data storage device. The design specifications for sensor accuracy are 97.5% for current, 98.3% for voltage, 98.7% for temperature, and 99.7% for light intensity. Sensor accuracy is 99.905% for current, 99.996% for voltage, 99.838% for temperature, and 99.383% for light intensity. Based on these results, the smart garden tool design can work well. The results of the increase for three variations of angles at three locations in the city are: Power absorption at an angle of 50° at 3 different locations obtained power absorption of 3447.07 Watts (urban), 2566.3 Watts (hills), and 2461 Watts (beach). Power absorption at an angle of 65 ° at 3 different locations obtained power absorption of 2324.67 Watts (urban), 1679.35 Watts (hills), and 1779.03 Watts (beach). Power absorption at an angle of 75° at 3 different locations obtained power absorption of 2162.16 Watts (urban), 1687.85 Watts (hills), and 1799.58 Watts (beach). From the measurement results, it can be concluded that increasing the effectiveness of solar panel energy harvesting can be done in urban locations at an angle of 50°.
ANALISIS KADAR BETA KAROTEN EKSTRAK DAUN KELOR MENGGUNAKAN TEKNIK KROMATOGRAFI LAPIS TIPIS DAN SPEKTROFOTOMETRI UV-VIS syafitri, eka; Andriani, Lili; Yulianis
JURNAL FARMASI GALENIKA Vol 7 No 1 (2020): Jurnal Farmasi Galenika Volume 7 No. 1
Publisher : Universitas Bhakti Kencana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70410/jfg.v7i1.176

Abstract

Daun kelor terbukti secara ilmiah merupakan sumber gizi berkhasiat obat yang memiliki beberapa kandungan vitamin dan mineral, salah satunya beta karoten. Beta karoten dapat dimanfaatkan untuk pencegahan penyakit degeneratif seperti kanker, tumor, jantung koroner, mencegah terbentuknya flek pada pembuluh darah arteri sehingga memperlancar aliran darah dan dapat meningkatkan kekebalan tubuh. Tujuan penelitian ini Untuk mengetahui kadar beta karoten dari daun kelor. Metode yang digunakan yaitu analisis dengan KLT dan spektrofotometri UV-Vis. Hasil analisis diperoleh kadar beta karoten dalam ekstrak daun kelor yaitu 3.963 ?g/g (3,963 mg/g), kadar beta karoten yang dikonversikan dalam daun kelor sebesar 238,68 ?g/g. Dari penelitian ini dapat disimpulkan bahwa beta karoten dapat dianalisa menggunakan teknik kromatografi lapis tipis dan spektrofotometri UV-Vis.
Co-Authors Lili Andriani Mairizwan Syafitri, Eka Yulkifli