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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Ekonomi dan Bisnis
Ratna Purnama Sari
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Humanities Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Social Sciences

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Pb Content in the Organs of Baung Fish (Hemibagrus mumurus) from the Outlet of the Koto Panjang Reservoir, Riau Province Ratna Purnama Sari; Budijono Budijono; M.Hasbi M.Hasbi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 2 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

ABSTRACTThe Outlet Waters of the Koto Panjang Reservoir get an abundance of water from the Koto Panjang Reservoir.The reservoir is used for fishing, plantation and other activities that have the potential to cause pollution, especially by heavy metals.Heavy metals are very dangerous because they cannot be destroyed by living things.This study aims to determine the heavy metal content of Pb in the organs (gills, kidneys, muscles) of baung fish (Hemibagrus mumurus) at the Outlet of the Koto Panjang Reservoir, Lubang Kolam, Kampar Regency.This research was conducted using a survey method by observing and taking samples of baung fish and water quality parameters (temperature, pH, depth, brightness, DO and CO2) from the Outlet flow of the Koto Panjang Reservoir. The content of heavy metal Pb was analyzed by Atomic Absorption Spectrophotometer at the UPT Construction Materials Laboratory of the PUPR Office of Riau Province.This research was conducted in August-December 2020.The results showed that the average heavy metal content of Pb in the kidneys of baung fish was 0.032 mg/kg, gills was 0.026 mg/kg and muscles were 0.007 mg/kg. It was concluded that the Pb content in baung fish was in accordance with SNI 7387:2009 and the fish was fit for consumption. Keywords: Hemibagrus nemurus,heavy metal, Pb, Koto Panjang Reservoir Outlet  
DETERMINAN PROFITABILITAS PADA PERUSAHAAN SUBSEKTOR PERTAMBANGAN BATUBARA YANG TERDAFTAR DI BURSA EFEK INDONESIA PERIODE 2017-2021 Ami Yuliyanti; Lulu Amalia Nusron; Rahandhika Ivan Adyaksana; Ratna Purnama Sari
Jurnal Ekonomi Dan Bisnis Vol 19 No 2 (2025): JEB Vol 19 No 2 Juli 2025
Publisher : LPPM STIE YKPN Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53916/jeb.v19i2.107

Abstract

This study targets to examine the impact of sales growth, inventory turnover, and working capital turnover on profitability of coal mining subsector companies. Indonesia's coal reserves are estimated to have a lifespan of 65 years. Coal is one of the main export commodities so it contributes greatly to Indonesia's economy. This research's method is quantitative by using secondary data. The coal mining subsector business listed in IDX during 2017 – 2021 period chosen as the population. The sampling approach used in this research is purposive sampling technique with the final number of samples as many as 14 companies. The data analysis approach used is multiple linear regression using SPSS 25 version. The final result of this research shows that sales growth partially has a positive effect on profitability, inventory turnover partially has a negative effect on profitability, and working capital turnover partially does not have an effect on profitability. This study's results also show that sales growth, inventory turnover, and working capital turnover simultaneously have a significant effect on profitability.
Co-Authors Ami Yuliyanti Budijono, Budijono Lulu Amalia Nusron M.Hasbi M.Hasbi Rahandhika Ivan Adyaksana