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All Journal Jurnal Informatika dan Teknik Elektro Terapan Journal of Comprehensive Science
Sulaiman, Mulky
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Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Library & Information Science

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Efektivitas Asap Cair Kayu Rambutan dalam Menghambat Pertumbuhan Colletotrichum sp Secara In Vitro Mahmud, Yusmar; Sulaiman, Mulky; Ikhsan Zam, Syukria
Journal of Comprehensive Science Vol. 3 No. 10 (2024): Journal of Comprehensive Science (JCS)
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v3i10.975

Abstract

Leaf blight is one of the main diseases in oil palm nurseries, as a result of the attack of the pathogen Colletotrichum sp. The initial symptoms are found on the edges of the leaves. Colletotrichum sp. is a pathogenic fungus that causes blight in oil palm, so it needs to be controlled. One of the alternative controls is by using rambutan wood liquid smoke. This study aims to obtain an effective concentration of rambutan wood liquid smoke that can inhibit the growth of Colletotrichum sp. in vitro. This research was carried out from November 2023 to January 2024 at the Laboratory of Pathology, Entomology, Microbiology and Soil Science, Faculty of Agriculture and Animal Husbandry, Sultan Syarif Kasim State Islamic University, Riau. This study used an experimental method with a complete randomized design (RAL) with 6 treatments (0%, 1%, 2%, 3%, 4% and 5%) with each treatment repeated 4 times, so that there were 24 experimental units. Observation parameters include total phenol analysis and PH test of liquid smoke, macroscopic, growth rate (cm/day) and inhibition (%) Colletotrichum sp. The results showed a total phenol content of 3.47% and a PH test. Rambutan wood liquid smoke with a concentration of 4% is very effective in inhibiting Colletotrichum sp. 100% inhibition and growth rate of 0 cm/day.
RANCANG BANGUN TRAINER PENGISIAN DAYA BATERAI BERBASIS DC TO DC BUCK CONVERTER MENGGUNAKAN PANEL SURYA 1,5WP Sulaiman, Mulky
Jurnal Informatika dan Teknik Elektro Terapan Vol. 14 No. 1 (2026)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v14i1.8314

Abstract

Masalah utama modul surya sebagai sumber energi alternatif adalah ketidakstabilan tegangan output yang memengaruhi pengisian baterai. Oleh karena itu, diperlukan buck converter untuk menyesuaikan tegangan agar sesuai dengan kebutuhan baterai. Penelitian ini merancang dan menguji Trainer Kit berbasis DC to DC buck converter sebagai media pembelajaran konversi energi surya. Pengujian dengan satu dan dua modul surya 12V 1,5 WP menunjukkan buck converter berhasil menurunkan tegangan input menjadi sekitar 5V, sesuai kebutuhan modul TP4056 untuk pengisian baterai lithium-ion. Output TP4056 stabil pada 4,20V dan arus 30 mA. Penambahan modul surya meningkatkan daya input tanpa memengaruhi arus pengisian karena dikendalikan TP4056. Trainer ini efektif menunjukkan fungsi buck converter dan kestabilan pengisian baterai berbasis energi surya, cocok untuk pembelajaran elektronika daya dan energi terbarukan
Co-Authors Ikhsan Zam, Syukria MAHMUD, YUSMAR