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All Journal Jurnal Perikanan dan Kelautan Journal of Coastal and Ocean Sciences
Aras Mulyadi
Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Immunology & microbiology Physics Social Sciences

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Identification of Phytochemical Compounds from Seaweed Extracts Eucheuma cottonii and Gracilaria verucossa and Their Effect on Bacteria Growth Escherichia coli Deki Januardi; Aras Mulyadi; Dessy Yoswaty
Journal of Coastal and Ocean Sciences Vol. 4 No. 1 (2023): January
Publisher : Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.4.1.5-9

Abstract

Seaweed is known to have several bioactive compounds that function as secondary metabolites and antioxidants. This study aims to determine the compounds in the seaweed Eucheuma cottoni and Gracilaria verucossa and their effects on Escherichia coli bacteria. This research was conducted from February to April 2022. The research method used was the experimental method by performing phytochemical tests and the disc method on bacteria. Conclusions can be drawn because of the results of the research that has been done. Seaweed E.cottoni and G.verucossa contain steroidal compounds. The effect on the growth of E.coli bacteria at concentrations (5%) 8.24 mM, (10%) 8.5 mM, and (15%) 8.62 mM was classified as moderate
Coastal Vulnerability Study Dumai City Riau Province Vivi Oktaviani; Aras Mulyadi; Mubarak Mubarak
Jurnal Perikanan dan Kelautan Vol 28, No 2 (2023): June 2023
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.28.2.197-207

Abstract

The purpose of this study was to determine the assessment and category of vulnerability level and calculate the parameters that affect coastal vulnerability. The method used is a survey method with direct observation, while the analysis method used is the calculation of CVI, the root of the multiplication of each variable weight. The data required includes primary data by direct observation, and secondary data with data from remote sensing satellites, primary data including coastal geomorphology, land use, tides, and secondary data including DEM (Digital Elevation Mode), coastal slope, shoreline changes, relative water level rise, significant wave height. The results of this study at the observation location obtained 3 categories of vulnerability namely low, high, and very high vulnerability levels found on the Dumai coast. The category of vulnerability in the low class is located in Dumai Barat District in Purnama Village with a value of 4.33-5.00, and the category of vulnerability in the high class is located in Dumai Timur District in Purnama Village grid A2 and A4 at Tanjung Palas grid A12,-A14 with a value of 8.66-10.61, and the category of vulnerability in the very high class is located in Dumai Barat District grid A5-A8, Dumai City District grid A9-A10, and Dumai Timur District in Tanjung Palas Village grid A15 with a value of 12.99-20.00
Co-Authors Deki Januardi Dessy Yoswaty Mubarak Mubarak Vivi Oktaviani