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Moh Muhaemin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Journal : JOURNAL OF COASTAL DEVELOPMENT

 1 
CHELATING ABILITY OF CRAB SHELL PARTICLES AND EXTRACTED ACETAMIDO GROUPS (CHITIN AND CHITOSAN) FROM Portunus sp TO LEAD (Pb2+) Moh Muhaemin
JOURNAL OF COASTAL DEVELOPMENT Vol 9, No 1 (2005): Volume 9, Number 1, Year 2005
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Various toxic metal species, including lead, are produced rapidly by industrial activities and fossil fuelconsumption. The use of biological component as sorbents for heavy metals might be an alternativemethod to reduce a heavy metal concentration from various aqueous systems. Here, we used crab shellparticles and extracted acetamido component from Portunus sp (chitin and chitosan) to reduce theconcentration of lead (II). The crab shell was powdered, sieved, and added with lead (II) in various pHvalues. The lead (II) solution added to extract of chitin and chitosan was separated, to determine thechelating ability of them. The result showed that the removal efficiency of lead with crab shell depend onpH value, but it was less sensitive than that of the control without crab shell. Biosorption of chitin andchitosan showed different phenomenon. It showed that both chitin and chitosan absorb with the bestcapacity at pH 4.0. Chitosan has higher sorption than chitin for all treatments. 
THE GLUTATHIONE DIURNAL CYCLING IN Dunaliella salina Moh Muhaemin
JOURNAL OF COASTAL DEVELOPMENT Vol 12, No 1 (2008): Volume 12, Number 1, Year 2008
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Glutathione is intracellular low molecular weight thiols as detoxification agent in most marine microalgae. The short continuous culture was used to describe diurnal cycle of intracellular glutathione during light: dark period. The result showed that glutathione tend to follow light period and minimum levels at the end of dark period. Cysteine exhibited twofold diurnal variations, maximum levels at the early dark period. Those may prove that glutathione may have an important role as an antioxidant in marine phytoplankton. 
Co-Authors Practica F Rosi Dona S Tri Agustina