News Column

Researchers from Hunan University Report New Studies and Findings in the Area of Sulfur Amino Acids

May 27, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Sulfur Amino Acids have been published. According to news reporting originating from Xiangtan, People's Republic of China, by NewsRx correspondents, research stated, "In this study, triangular silver nanoplates (TAg-NPs) were used to detect trace Cysteine concentration in the presence of sodium thiosulfate (Na2S2O3). Study showed that the TAg-NPs could be gently etched by Cysteine with the concentration of 1.0 x 10(-7) mol L-1 through forming Ag-S covalent bond at the three corners."

Our news editors obtained a quote from the research from Hunan University, "However, in the presence of Na2S2O3 (only 3.0 x 10(-6) mol L-1), the corrosion of Cysteine on TAg-NPs can be promoted significantly. It was also found that the color, morphology, and the maximum absorption wavelength of TAg-NPs change clearly with the concentrations of Cysteine as low as 2.5 x 10(-8) mol L-1. Furthermore, the wavelength shift values (Delta lambda) of TAg-NPs solution were proportional to the concentrations of Cysteine in the range of 1.0 x 10(-9)-1.0 x 10(-7) mol L-1, and the linear regression equation is Delta lambda = -0.89 + 319.94 c (c, mu M, n = 5) with the correlation coefficient of 0.990. At the same time, the color change of the TAg-NPs solution could be observed clearly by the naked eyes with increasing Cysteine concentrations in the range of 2.5 x 10(-8)-1.0 x 10(-7) mol L-1. Thus, a novel method for the detection of Cysteine by either UV-vis spectrophotometry detection or naked eyes observation is established."

According to the news editors, the research concluded: "It allows determination of Cysteine content in compound amino acid injection sample of 18AA-V."

For more information on this research see: Visual determination of trace Cysteine based on promoted corrosion of triangular silver nanoplates by sodium thiosulfate. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 2014;125():285-289. Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England (see also Sulfur Amino Acids).

The news editors report that additional information may be obtained by contacting X.Y. Hou, Hunan Univ Sci & Technol, Minist Educ China, Sch Chem & Chem Engn, Key Lab Theoret Chem & Mol Simulat, Xiangtan 411201, People's Republic of China. Additional authors for this research include S. Chen, J. Tang and Y.F. Long.

Keywords for this news article include: Asia, Ions, Xiangtan, Cysteine, Nanoplates, Electrolytes, Sulfur Acids, Thiosulfates, Nanotechnology, Sulfur Compounds, Sulfur Amino Acids, Inorganic Chemicals, Neutral Amino Acids, Sulfhydryl Compounds, Emerging Technologies, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

For more stories covering the world of technology, please see HispanicBusiness' Tech Channel

Source: Life Science Weekly

Story Tools Facebook Linkedin Twitter RSS Feed Email Alerts & Newsletters