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Iwan Iskandar
Sanitation, Health Polytechnic Tanjungpinang, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Bacterial Isolation Which is Potential as Cellulosa Pedegradation in Coastal Performance In Tanjungpinang City Iwan Iskandar; Hevi Horiza
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 20 No. 2 (2019): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (843.236 KB) | DOI: 10.24036/eksakta/vol20-iss2/206

Abstract

Many black water or feces and urine field observations in Tanjung Pinang City were dumped directly into the ditches, rivers, and sea. This proves that the management of domestic liquid waste in the City of Tanjungpinang, especially black water, has not yet received serious attention, resulting in a decline in environmental quality. One of the stages in processing black water is decomposition. The decomposition process can be assisted by bacteria, one of which is cellulose-degrading bacteria. This study aims to find bacterial isolates that have the potential to degrade cellulose in feces from coastal soils in Tanjung Pinang City. This research is a laboratory experimental research. The results of this study were obtained 16 bacterial isolates that can degrade cellulose. From these 16 isolates, 3 genera of bacteria were obtained, namely Pseudomonas, Acetobacter and Acinetobacter. Keywords: Cellulose Degradation Bacteria, Coastal Soil
Reducing the Number of Germs on Hands Using Disinfectants Combination of Betal Leaves and Kalamansi Orange Iwan Iskandar; Hevi Horiza; Mutia Yuhesti
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 22 No. 4 (2021): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (791.359 KB) | DOI: 10.24036/eksakta/vol22-iss4/291

Abstract

Covid-19 can be spread through particles from a patient's sneeze or cough attached to other objects such as clothing or electronic devices from people around him. Therefore, it is necessary to take precautions to prevent the spread of Covid-19. There are many ways to prevent the transmission of Covid-19, one of which is the use of antiseptics and disinfectants. We can make disinfectants from natural ingredients such as boiled betel leaves and lime juice. Both of these plants have compounds that function as anti-microbial. From the results of the study, it was found that of the 3 combination formulas of Betel and Kalamansi, the best formula for reducing the number of germs was formula 2, namely the combination of Betel and Kalamansi with a ratio of 60:40. For testing against the nCov-2019 Virus, the best formula is formula 3, namely the combination of Betel and Kalamansi 40:60 with the results of 30 positive samples, 20 samples being negative due to damage to the glycoprotein envelope layer.
Co-Authors Horiza, Hevi Mutia Yuhesti