کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7079037 | 1459987 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cellular surface characteristics of Saccharomyces cerevisiae before and after Ag(I) biosorption
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
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چکیده انگلیسی
The surface characteristics of Saccharomyces cerevisiae before and after Ag(I) biosorption were investigated by comprehensively using the scanning electron microscopy with the energy-dispersive X-ray analysis (SEM-EDX), the transmission electron microscopy with energy-dispersive X-ray analysis (TEM-EDX) and atomic force microscopy (AFM). The results showed that cell surface elements, surface topography and three-dimensional structures of S. cerevisiae changed after Ag(I) biosorption. SEM observation indicated that the appearances of Ag-adsorbed cells varied with initial Ag(I) concentration and contact time. TEM images observed Ag(I)-containing precipitates. AFM observation indicated that cells became smaller, and cell surface became smoother. The results of SEM-EDX, TEM-EDX, AFM and biosorption illustrated that Ag(I) was adsorbed onto the cell surface by covalent binding and ionic binding. P-, S- and O-containing groups on cell surface possibly contributed to the binding silver ions, and the N-containing components released from cells also probably contributed to Ag(I) biosorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 156, March 2014, Pages 380-383
Journal: Bioresource Technology - Volume 156, March 2014, Pages 380-383
نویسندگان
Can Chen, Donghui Wen, Jianlong Wang,