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The Use of Selected Biomarkers, Phagocytic and Cholinesterase Activity to Detect the Effects of Dimethoate on Marine Mussel (Mytilus edulis)

HAYATI Journal of Biosciences Vol 15, No 1 (2008): March 2008
Publisher : Bogor Agricultural University, Indonesia

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Abstract

Effects of organophosphorous pesticide, dimethoate on blue mussels, Mytilus edulis using selected biomarkers have been studied. Mussels were exposed to serial dilutions of dimethoate, 7.88, 15.75, 31.35, and 63.00 µg/l including positive and negative controls for 14 days. The suppression effects of dimethoate on phagocytic activity significantly occurred at two lowest concentrations of dimethoate (7.88 and 15.75 µg/l), but stimulation effects significantly emerged at the following highest concentrations (31.35 and 63.00 µg/l). The declining tendency of the cholinesterase (ChE) activity (23% lower than the control) appeared when mussels exposed to 7.88 and 15.75 µg/l dimethoate. Moreover, the significant inhibition of the ChE activity occurred at 31.35 µg/l dimethoate exposure. This study suggested that the phagocytic and the ChE activity are useful biomarkers for assessing the affects of organophosporous pesticide, dimethoate on neuro-immune system of blue mussels, M. edulis. Key words: dimethoate, cholinesterase, phagocytic, blue mussels

The Effectiveness of High Speed Aeration to Reduce Pollutant from Final Waste Disposal Leachate: Case Study at Galuga Final Waste Disposal Site (TPA) Bogor City

Forum Pasca Sarjana Vol 34, No 1 (2011): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

A laboratory scale research to obtain environmentally safe effluent from Final Waste Disposal Site leachate in Galuga owned by Regional Government of Bogor City was conducted from July 2006 through to April 2007. The experiment of production tolerable threshold effluent was carried out by aerating the leachate in 4 different aeration rates (0, 10, 30 and 70 liters/minute).  The research found that the most effective method to reduce pollutant was aerating at the rate of 70 liters/minutes.  However, only some of pollutant (Cu, Zn, Pb and E.coli) can be reduced until below tolerable threshold.   Keywords: effluent, leachate, tolerable threshold

Peranan Zona Pelusida Sebagai Barier Terhadap Cemaran Escherichia coli K99 (THE ROLE OF ZONA PELLUCIADA AS A BARRIER OF E COLI K99 CONTAMINATION)

Jurnal Veteriner Vol 14, No 2 (2013)
Publisher : Jurnal Veteriner

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Abstract

The aim of the study was to investigate the role of zona pelucida (ZP) as a barrier of embryo againstE.coli K99 contamination.   The complete randomized design was used in this study.  The embryos weregiven treatment as a follow : 1) embryos without ZP were contaminated with E.coli K99;  2) embryo withintact ZP were contaminated with E.coli K99;  and  3) embryos  with intact ZP were not contaminated withE.coli K99, as a control.  In each treatment there was 15 replication and in each replication there was oneembryo.  The embryos were incubated in incubator at 37°C and 5% CO2 atmosphere.  The embryos wereobserved every six hours in 24 hours using inverted microscope.  The result showed that embryos withintact ZP could develop in culture contaminated with  E.coli K99, while embryos without ZP becomedegenerated.  The viability of intact embryos was 75% and the embryos without ZP were 65%.  Embryosculture in contaminated medium could develop from eight cells embryo into morulla stage of embryo,compact morulla, and blastocyst. E.coli K99 contamination could inhibit embryo development.  In conclusion,ZP could protect embryo against E.coli K99 contamination.

PENGOLAHAN LINDI SEBAGAI PUPUK CAIR UNTUK MENDUKUNG PENGEMBANGAN TPA SAMPAH LESTARI

Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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Abstract

A laboratory scale research to obtain environmentally safe effluent and liquid fertilizer from leachate from Final Waste Disposal Site in Galuga owned by Regional Government of Bogor City was conducted from July 2006 through to April 2007. The experiment was initiated by aerating the leachate in 4 difference aeration rates (0, 10, 30 and 70 liters/minute) followed by processing the sediment to product the liquid fertilizer. The experiment of production liquid fertilizer was carried out by adding lime with different dosage into sediment generated from processing by aerating at 70 liters/minute followed by centrifugation process or secher. Further, the liquid fertilizer generated from such experiment was applied to chilis planting (Capsicum annum). The research found that the processing conducted by aerating at the rate 70 liters/minute was the most effective in reducing pollutant from leachate. The addition of 1000 ppm CaO or Ca(OH)2 limes in sediment from aeration is the most effective in depositing the dissolved material compared to the addition of limes in other dosage. Liquid fertilizer generated through the addition of 1000 ppm CaO have the content of N = 375,83 ppm, P = 121,44 ppm, K = 948,11 ppm, Ca = 827,20 ppm, Mg = 959,50 ppm, S = 48,53 ppm, Cu = 8,23 ppm, Zn = 30,02 ppm, Mn = 230,57 ppm, Fe = 320,95 ppm, Pb = 10,34 ppm, Cd = 7,46 ppm and Cr = 2,05 ppm. The use of liquid fertilizer generated by adding 1000 ppm CaO was the most effective in enhancing vegetation growth and production of chili. The non essential elements (Pb, Cd and Cr) in fruits from vegetation given liquid fertilizer produced from such treatment did not exceed tolerable threshold.