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cysteine

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Journal Article

Equilibrium study of adsorption of L-cysteine by natural bentonite

H. Faghihian, M. Nejati-Yazdinejad
Journal: Clay Minerals
Published: 01 March 2009
Clay Minerals (2009) 44 (1): 125–133.
DOI: https://doi.org/10.1180/claymin.2009.044.1.125
...H. Faghihian; M. Nejati-Yazdinejad Abstract L-cysteine (Cys) was adsorbed by bentonite (Ben) from aqueous solutions of variable concentrations and pHs. The raw materials and the adsorbed molecules (Ben-Cys) were characterized using X-ray diffraction (XRD), infrared spectroscopy (IR), thermal...
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Journal Article

Effects of exchange cations and layer-charge location on cysteine retention by smectites

Maria Franca Brigatti, Cristina Lugli, Stefano Montorsi, Luciano Poppi
Published: 01 October 1999
Clays and Clay Minerals (1999) 47 (5): 664–671.
...Maria Franca Brigatti; Cristina Lugli; Stefano Montorsi; Luciano Poppi Abstract This study investigates the complexes formed between amino acids, which are the natural degradation products of organic matter, and smectites. Thus, the adsorption and desorption behavior of cysteine and Na-, Ca-, Cu...
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Journal Article

Effect of cysteine and manganese on the crystallization of noncrystalline iron(III) hydroxide at pH 8

R. M. Cornell, R. Giovanoli, W. Schneider
Published: 01 February 1990
Clays and Clay Minerals (1990) 38 (1): 21–28.
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Comparison of FTIR spectra for nontronite, <span class="search-highlight">cysteine</span>, and <span class="search-highlight">cysteine</span>-NAu-2 com...

Comparison of FTIR spectra for nontronite, cysteine, and cysteine-NAu-2 com...

Published: 01 August 2007
F igure 2. Comparison of FTIR spectra for nontronite, cysteine, and cysteine-NAu-2 complex. Label A refers to the stretching of CH 2 (2926–2853 cm −1 ) and NH 3+ groups (3130–3030); label B refers to NH 3+ deformation and COO − asymmetric stretching modes.
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( a ) XRD patterns for oriented specimens of NAu-2, bioreduced NAu-2, ethyl...

( a ) XRD patterns for oriented specimens of NAu-2, bioreduced NAu-2, ethyl...

Published: 01 August 2007
F igure 1. ( a ) XRD patterns for oriented specimens of NAu-2, bioreduced NAu-2, ethylene glycolated bioreduced NAu-2, abiotic cysteine-NAu-2 control (no cells added), bioreduced cysteine-NAu-2, and ethylene glycolated, bioreduced cysteine-NAu-2. ( b ) XRD patterns for oriented specimens of NAu
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A histogram showing the distribution of layer spacings in the <span class="search-highlight">cysteine</span>-NAu-...

A histogram showing the distribution of layer spacings in the cysteine-NAu-...

Published: 01 August 2007
F igure 5. A histogram showing the distribution of layer spacings in the cysteine-NAu-2 complex as a result of bioreduction in comparison with the abiotic control (no cells added). Total 56 and 124 packets for bioreduced and nonreduced cysteine-NAu-2 were measured.
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A mockup example of Zn transport through a cell. We assume that Zn is impor...

A mockup example of Zn transport through a cell. We assume that Zn is impor...

Published: 01 January 2017
, which requires cysteine biosynthesis in the cytosol. Cysteine biosynthesis is dependent on methionine uptake. Cytosolic cysteine is broken down with a first-order rate. All the units and the parameters are arbitrary. It was assumed that at t = 30, the rate of metallothionein catabolism increases
Journal Article

Microbial effects in promoting the smectite to illite reaction: Role of organic matter intercalated in the interlayer

Gengxin Zhang, Jinwook Kim, Hailiang Dong, Andre J. Sommer
Published: 01 August 2007
American Mineralogist (2007) 92 (8-9): 1401–1410.
DOI: https://doi.org/10.2138/am.2007.2331
...F igure 2. Comparison of FTIR spectra for nontronite, cysteine, and cysteine-NAu-2 complex. Label A refers to the stretching of CH 2 (2926–2853 cm −1 ) and NH 3+ groups (3130–3030); label B refers to NH 3+ deformation and COO − asymmetric stretching modes. ...
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( a ) Secondary electron image showing the remaining <span class="search-highlight">cysteine</span>-NAu-2 complex...

( a ) Secondary electron image showing the remaining cysteine-NAu-2 complex...

Published: 01 August 2007
F igure 4. ( a ) Secondary electron image showing the remaining cysteine-NAu-2 complex in the abiotic control after 41 days of incubation. The inset is a SEM-EDS spectrum of the cysteine-NAu-2 complex showing a typical elemental composition of the complex. The Au peak is from Au coating
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IR spectra of <span class="search-highlight">cysteine</span>, bentonite and Ben-Cys.

IR spectra of cysteine, bentonite and Ben-Cys.

Published: 01 March 2009
F ig . 2. IR spectra of cysteine, bentonite and Ben-Cys.
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TG and DTG curves of bentonite (a) and <span class="search-highlight">cysteine</span> (b).

TG and DTG curves of bentonite (a) and cysteine (b).

Published: 01 March 2009
F ig . 3. TG and DTG curves of bentonite (a) and cysteine (b).
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Thermodynamic values for <span class="search-highlight">cysteine</span> adsorption on bentonite. Δ H ° (kJ...

Thermodynamic values for cysteine adsorption on bentonite. Δ H ° (kJ...

Published: 01 March 2009
T able 3. Thermodynamic values for cysteine adsorption on bentonite. Δ H ° (kJ/mol) Δ S ° (J/mol) Δ G ° (kJ/mol) 293 303 313 323 333 (K) -20.37 -58.87 -3.12 -2.53 -1.94 -1.35 -0.77
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Thermodynamic values for <span class="search-highlight">cysteine</span> adsorption on bentonite. Δ H ° (kJ...

Thermodynamic values for cysteine adsorption on bentonite. Δ H ° (kJ...

Published: 01 March 2009
T able 3. Thermodynamic values for cysteine adsorption on bentonite. Δ H ° (kJ/mol) Δ S ° (J/mol) Δ G ° (kJ/mol) 293 303 313 323 333 (K) -20.37 -58.87 -3.12 -2.53 -1.94 -1.35 -0.77
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Effect of pH on <span class="search-highlight">cysteine</span> adsorption.

Effect of pH on cysteine adsorption.

Published: 01 March 2009
F ig . 7. Effect of pH on cysteine adsorption.
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Effect of contact time on adsorption of <span class="search-highlight">cysteine</span>.

Effect of contact time on adsorption of cysteine.

Published: 01 March 2009
F ig . 8. Effect of contact time on adsorption of cysteine.
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Effect of temperature on <span class="search-highlight">cysteine</span> adsorption.

Effect of temperature on cysteine adsorption.

Published: 01 March 2009
F ig . 9. Effect of temperature on cysteine adsorption.
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TEM micrographs of ( a ) nonreduced <span class="search-highlight">cysteine</span>-NA-2 with layer spacings of 14...

TEM micrographs of ( a ) nonreduced cysteine-NA-2 with layer spacings of 14...

Published: 01 August 2007
F igure 6. TEM micrographs of ( a ) nonreduced cysteine-NA-2 with layer spacings of 14–15 Å; ( b ) bioreduced cysteine-NAu-2 showing Fe-precipitates and illite (I) particles. The inset EDX shows typical illite composition of high Al/Si ratio and K; ( c ) high magnification image
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TEM micrographs of ( a ) bioreduced <span class="search-highlight">cysteine</span>-NAu-2 with 11 Å layers and Fe...

TEM micrographs of ( a ) bioreduced cysteine-NAu-2 with 11 Å layers and Fe...

Published: 01 August 2007
F igure 7. TEM micrographs of ( a ) bioreduced cysteine-NAu-2 with 11 Å layers and Fe-precipitate mixtures; ( b ) high magnification of the outlined area showing 3.6 Å fringes and typical siderite diffraction patterns with strong diffractions of 2.0, 2.7, and 3.6 Å spacings; ( c ) illite
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A sketch of sulfur trafficking in a generalized cell. Abbreviations: S-aden...

A sketch of sulfur trafficking in a generalized cell. Abbreviations: S-aden...

Published: 01 January 2017
Figure 7 A sketch of sulfur trafficking in a generalized cell. Abbreviations: S-adenosyl methionine (SAM, a methylation agent involved in the intracellular biosynthesis of cysteine from methionin), metallothionein (MT, a cysteine-rich metal store). A lysosome is a membrane-bound cell organelle
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1 s NEXAFS spectra of S in <span class="search-highlight">cysteine</span> as a function of pH (modified from Pi...

1 s NEXAFS spectra of S in cysteine as a function of pH (modified from Pi...

Published: 01 January 2002
Figure 34. 1 s NEXAFS spectra of S in cysteine as a function of pH (modified from Pickering et al. 1998 ).