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All Journal Jurnal Rekayasa Proses Prosiding Semnastek JURNAL KONVERSI Jurnal Rekayasa Proses Jurnal Redoks BASKARA: Journal of Business and Entrepreneurship Journal Industrial Manufacturing GEMBIRA (Pengabdian Kepada Masyarakat) Sainteks: Jurnal Sain dan Teknik Composite Jurnal Rekayasa Proses ABDIMAS Iqtishadia Darma Abdi Karya: Jurnal Pengabdian Kepada Masyarakat
Rini Siskayanti
Fakultas Teknik, Universitas Insan Cendekia Mandiri
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Social Sciences Veterinary Other

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Optimalisasi Kegiatan Fire Drill bagi Karyawan dalam Menjaga Keselamatan Kerja di Gedung Kantor PT MGA Kosim, Muhamad Engkos; Suryatman, Tina Hernawati; Siskayanti, Rini
Journal Industrial Manufacturing Vol 10, No 2 (2025): Journal Industrial Manufacturing
Publisher : Program Studi Teknik Industri Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jim.v10i1.14003

Abstract

Fire drill training in the workplace is very important to familiarize employees in the event of a fire. This study examines simulation training in dealing with fire emergencies in the PT MGA office building located in South Jakarta with 23 participants. With proper evacuation simulation training during a fire emergency, it is expected to minimize losses that can occur. Evaluation of the implementation of fire drills is needed to determine how the implementation of fire drills improves the safety of PT MGA employees and how employees understand the implementation of fire drills. In this study, the author used a qualitative descriptive approach and primary and secondary data sources. The results of this study show that the implementation of fire drills is quite effective, with the majority of employees understanding evacuation procedures However, several technical constraints and improvements to facilities and infrastructure such as the type of fire extinguisher, automatic sprinkler system, alarm and hydrant need to be followed up. Follow-up and further training are recommended to improve preparedness.Keywords: Fire Drill, Fire, Evacuation, Office Building, Fire Extinguisher
Extraction of Polyphenols in Green Tea Shoots as Antioxidant Substance Siskayanti, Rini; Rizkiah, Riza; Muliati, Lia; Nurilah, Andini; Subagja, Deden; Fadil, MI
Sainteks: Jurnal Sain dan Teknik Vol 6 No 1 (2024): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i1.652

Abstract

Green tea is a plant that has polyphenolic active compounds. Polyphenols are a group of compounds that act as natural antioxidants. Antioxidants are needed by the body to protect the body from free radical attacks. The polyphenol content in the tea leaves itself is influenced by the weather, variety, soil type, and the degree of maturity of the leaves when picked. Therefore, in this study green tea shoots were used because the polyphenol content and antioxidant activity of green tea in the shoots are known to be greater than the leaves on the stalks below. This study aims to determine the levels of polyphenols in green tea shoots using distilled water, 50% ethanol; 96% ethanol and determine the value of antioxidant activity obtained from the results of samples that have the highest levels of total polyphenols by maceration method for 24 hours. The results of maceration are then separated between the filtrate and the precipitate. Then the filtrate is concentrated to obtain a thick extract and removes the remaining solvent using a rotary evaporator that is set to a pressure of 1 bar and a temperature below the boiling point of the solvent. Furthermore, the viscous extract obtained was tested by the Follin-Ciocalteu method using UV-Vis spectrophotometry at a wavelength of 765 nm and gallic acid as a standard to determine the levels of polyphenolic compounds. The test results for the highest levels of polyphenols were tested for antioxidant activity using the DPPH method (2,2 Diphenyl -1-Pikrylhidrazyl) which causes a color change and then measured using a spectrophotometer at a wavelength of 512 nm. Antioxidant activity can be seen from the IC50 (inhibitory concentration) value or the concentration that can reduce 50% of free radicals because the lower the IC50 value, the greater the antioxidant activity. The results showed that the levels of polyphenols in green tea shoot extract were respectively 16.47%; 22.16%; 18.09% so that the highest levels of polyphenols were obtained in green tea leaf extract macerated using 50% ethanol solvent. The results of the antioxidant activity test on samples using 50% ethanol solvent obtained an IC50 value of 5.7 ppm and included in the very good category.
Co-Authors Afriani Kusumadewi Alfi Aulia Ajilan Anita Rozalina Dini Yulilanti Dwi Prambudi Dwi Prambudi Fadil, MI Feny Nurherawati Filly Pravitasari Galu Murdikaningrum Galu Murdikaningrum Goesti Muhamad Fajar Wathoni Hardianto Iridiastadi Ilham Eka Santang Kosim, Muhamad Engkos Lia Muliati Lia Muliati Luciana M. Engkos Kosim Maulana Fahrizal Abdan Muhamad Engkos Kosim Muhamad Engkos Kosim Muhamad Engkos Kosim Muhamad Engkos Kosim Muhammad Engkos Kosim Muhammad Engkos Kosim Muhammad Engkos Kosim Muhammad Engkos Kosim Muhammad Fikri Ibnu Hidayat Muhammad Nitis Jiwana Ksatria Mujnitri Yasni Muliati, Lia N Nelfiyanti Novy Komalasari Nurilah, Andini Nurul Hidayati Fithriyah Rani Pramudyo Ningtyas Ranti Nurul Jamilah Ratri Ariatmi Nugrahani Rifa Mar’atul Fikriyah Riza Rizkiah Rizkiah, Riza Salma Hasna Hanifah Subagja, Deden Suryatman, Tina Hernawati Tiara Nurhuda Wenny Diah Rusanti Wenny Diah Rusanti