Question

What is the methodology of extraction of heavy metals from seaweeds?

Answer 1

The status of Pb, Cd, Cu, Ni, Zn and Fe in sediment and 11 dominant seaweed species from the Strait of Hormuz during 4 seasons (autumn 2007 until summer 2008) at 13 different sites were determined. etals were extracted from sample homogenates by hot concentrated nitric acid (65%) and extracts were analyzed by an atomic absorption spectrophotometer. The annually mean metals in the sediment were: Pb (23.10), Cd (4.15), Cu (9.40), Ni (18.19), Zn (41.93) and Fe (20871) μg gG1 dry weight. In the present research, mean metal levels in sediment and algae decreased in the following order: Fe > Zn > Pb > Ni > Cu > Cd. Among all species, Padina pavonica and Ulva compressa showed maximum time and space distribution and high significant positive correlations existed between metals in Padina pavonica and Ulva compressa and the sediment, suggesting these algal species as suitable tools for biomonitoring of the area.

Answer 2

A Comparison of Protein Extraction Methods Suitable for Gel-Based Proteomic Studies of Aphid Proteins

M. Cilia,1 T. Fish,1 X. Yang,1,2,* M. Mclaughlin,1,† T. W. Thannhauser,1 and S. Graycorresponding author1,3