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All Journal Maspari Journal JOURNAL OF COASTAL DEVELOPMENT
Moh Muhaemin
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Starvasi Nitrogen dan Pengaruhnya Terhadap Biomassa dan Protein Total Nannochloropsis sp. (Nitrogen Starvation Effect on Biomass and Crude Protein of Nannochloropsis sp) Moh Muhaemin; Practica F; Rosi Dona S; Tri Agustina
Maspari Journal : Marine Science Research Vol 6, No 2 (2014): Edisi Juli
Publisher : UNIVERSITAS SRIWIJAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2096.801 KB) | DOI: 10.36706/maspari.v6i2.1817

Abstract

Pengurangan nitrogen anorganik sebagai nutrien pada media kultur merupakan salahsatu metode untuk mempersingkat fase eksponensial pada kultur mikroalgae.Pengurangan nitrat anorganik pada media kultur Nannochloropsis sp hingga 50%dari konsentrasi normal pada media kultur Conwy ternyata mampu menurunkankepadatan rata-rata (sel/ml) hingga 15,16 % dan menurunkan pula kandungan proteintotal 13,93 %. Fenomena tersebut mengindikasikan bahwa pengurangan nitrogenanorganik pada media kultur berdampak negatif pada kepadatan (sel/ml) dankandungan protein total namun mampu mereduksi waktu kultur pada faseeksponensial mikroalgae Nannochloropsis sp.
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