Analysis of Two Bentonites of Enological Interest before and after Commercial Activation by Solid Na2CO3
Two natural calcium-rich bentonites used for the removal of wine proteins, originating from Greece and Turkey, were studied by X-ray diffraction, thermal analysis, and solid state NMR, before and after activation by solid Na2CO3. Exchange of Ca2+ by Na+ mainly occurs for cations located at the edge...
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| Veröffentlicht in: | Journal of agricultural and food chemistry 2003-07, Vol.51 (14), p.4096-4100 |
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| container_issue | 14 |
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| container_title | Journal of agricultural and food chemistry |
| container_volume | 51 |
| creator | Gougeon, Régis D Soulard, Michel Miehé-Brendlé, Jocelyne Chézeau, Jean-Michel Le Dred, Ronan Jeandet, Philippe Marchal, Richard |
| description | Two natural calcium-rich bentonites used for the removal of wine proteins, originating from Greece and Turkey, were studied by X-ray diffraction, thermal analysis, and solid state NMR, before and after activation by solid Na2CO3. Exchange of Ca2+ by Na+ mainly occurs for cations located at the edge of layers and only weakly for interlayer cations. This Na2CO3 activation process leads to an increased efficiency in the adsorption process of bovine serum albumin (BSA) used as a model protein for both bentonites. A direct correlation is observed between the extent of Ca2+/Na+ exchange, the strength of adsorption of BSA, and the extent of unfolding of BSA backbone. Keywords: Bentonite; Na2CO3 activation; bovine serum albumin; X-ray diffraction; differential thermal analysis; thermogravimetry; NMR |
| doi_str_mv | 10.1021/jf0212237 |
| format | Article |
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Exchange of Ca2+ by Na+ mainly occurs for cations located at the edge of layers and only weakly for interlayer cations. This Na2CO3 activation process leads to an increased efficiency in the adsorption process of bovine serum albumin (BSA) used as a model protein for both bentonites. A direct correlation is observed between the extent of Ca2+/Na+ exchange, the strength of adsorption of BSA, and the extent of unfolding of BSA backbone. Keywords: Bentonite; Na2CO3 activation; bovine serum albumin; X-ray diffraction; differential thermal analysis; thermogravimetry; NMR</description><identifier>ISSN: 0021-8561</identifier><identifier>EISSN: 1520-5118</identifier><identifier>DOI: 10.1021/jf0212237</identifier><identifier>CODEN: JAFCAU</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>adsorption ; Biological and medical sciences ; bovine serum albumin ; cations ; Fermented food industries ; Food industries ; Fundamental and applied biological sciences. 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Agric. Food Chem</addtitle><description>Two natural calcium-rich bentonites used for the removal of wine proteins, originating from Greece and Turkey, were studied by X-ray diffraction, thermal analysis, and solid state NMR, before and after activation by solid Na2CO3. Exchange of Ca2+ by Na+ mainly occurs for cations located at the edge of layers and only weakly for interlayer cations. This Na2CO3 activation process leads to an increased efficiency in the adsorption process of bovine serum albumin (BSA) used as a model protein for both bentonites. A direct correlation is observed between the extent of Ca2+/Na+ exchange, the strength of adsorption of BSA, and the extent of unfolding of BSA backbone. Keywords: Bentonite; Na2CO3 activation; bovine serum albumin; X-ray diffraction; differential thermal analysis; thermogravimetry; NMR</description><subject>adsorption</subject><subject>Biological and medical sciences</subject><subject>bovine serum albumin</subject><subject>cations</subject><subject>Fermented food industries</subject><subject>Food industries</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>nuclear magnetic resonance spectroscopy</subject><subject>thermal analysis</subject><subject>wines</subject><subject>Wines and vinegars</subject><subject>X-ray diffraction</subject><issn>0021-8561</issn><issn>1520-5118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><recordid>eNpFkUlPwzAQhS0EEmU58AvwhWNgbMdZjqUqm9hEC1drktjFJY0rOyz99xiKymVGevPpzWgeIUcMThlwdjY3sXIu8i0yYJJDIhkrtskAopwUMmO7ZC-EOQAUMocBeR122K6CDdQZOv109Fx3vetsr3-VcedaN7M1tvS667XXoaeVNs5ril1D0USNjtxioX1tIzSse_uBvXUdrVZ04lrb0HvkowdxQHYMtkEf_vV98nwxno6uktuHy-vR8DZBnss-aXTJs7TJKsmKtEaUCLKCAiVPm6pgpSkbXpk8Q9OYKgXGRSm51jU2JRMiE2KfnKx9lxji2cZjV9uglt4u0K8US0vOBC8il6w5G3r9tZmjf1NZLnKppo8TdXMxfXrJS67uIn-85g06hTMfPZ8nHFgKwASUwP83Yx3U3L37-NmgGKifYNQmGPENrKZ8fQ</recordid><startdate>20030702</startdate><enddate>20030702</enddate><creator>Gougeon, Régis D</creator><creator>Soulard, Michel</creator><creator>Miehé-Brendlé, Jocelyne</creator><creator>Chézeau, Jean-Michel</creator><creator>Le Dred, Ronan</creator><creator>Jeandet, Philippe</creator><creator>Marchal, Richard</creator><general>American Chemical Society</general><scope>FBQ</scope><scope>BSCLL</scope><scope>IQODW</scope></search><sort><creationdate>20030702</creationdate><title>Analysis of Two Bentonites of Enological Interest before and after Commercial Activation by Solid Na2CO3</title><author>Gougeon, Régis D ; Soulard, Michel ; Miehé-Brendlé, Jocelyne ; Chézeau, Jean-Michel ; Le Dred, Ronan ; Jeandet, Philippe ; Marchal, Richard</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a275t-de9264d6b5184caa5a05b08a524db819f9d2bf76afdfb40123952eecad9133633</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>adsorption</topic><topic>Biological and medical sciences</topic><topic>bovine serum albumin</topic><topic>cations</topic><topic>Fermented food industries</topic><topic>Food industries</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>nuclear magnetic resonance spectroscopy</topic><topic>thermal analysis</topic><topic>wines</topic><topic>Wines and vinegars</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gougeon, Régis D</creatorcontrib><creatorcontrib>Soulard, Michel</creatorcontrib><creatorcontrib>Miehé-Brendlé, Jocelyne</creatorcontrib><creatorcontrib>Chézeau, Jean-Michel</creatorcontrib><creatorcontrib>Le Dred, Ronan</creatorcontrib><creatorcontrib>Jeandet, Philippe</creatorcontrib><creatorcontrib>Marchal, Richard</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>Pascal-Francis</collection><jtitle>Journal of agricultural and food chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gougeon, Régis D</au><au>Soulard, Michel</au><au>Miehé-Brendlé, Jocelyne</au><au>Chézeau, Jean-Michel</au><au>Le Dred, Ronan</au><au>Jeandet, Philippe</au><au>Marchal, Richard</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Analysis of Two Bentonites of Enological Interest before and after Commercial Activation by Solid Na2CO3</atitle><jtitle>Journal of agricultural and food chemistry</jtitle><addtitle>J. Agric. Food Chem</addtitle><date>2003-07-02</date><risdate>2003</risdate><volume>51</volume><issue>14</issue><spage>4096</spage><epage>4100</epage><pages>4096-4100</pages><issn>0021-8561</issn><eissn>1520-5118</eissn><coden>JAFCAU</coden><abstract>Two natural calcium-rich bentonites used for the removal of wine proteins, originating from Greece and Turkey, were studied by X-ray diffraction, thermal analysis, and solid state NMR, before and after activation by solid Na2CO3. Exchange of Ca2+ by Na+ mainly occurs for cations located at the edge of layers and only weakly for interlayer cations. This Na2CO3 activation process leads to an increased efficiency in the adsorption process of bovine serum albumin (BSA) used as a model protein for both bentonites. A direct correlation is observed between the extent of Ca2+/Na+ exchange, the strength of adsorption of BSA, and the extent of unfolding of BSA backbone. Keywords: Bentonite; Na2CO3 activation; bovine serum albumin; X-ray diffraction; differential thermal analysis; thermogravimetry; NMR</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/jf0212237</doi><tpages>5</tpages></addata></record> |
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| issn | 0021-8561 1520-5118 |
| language | eng |
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| source | ACS Publications |
| subjects | adsorption Biological and medical sciences bovine serum albumin cations Fermented food industries Food industries Fundamental and applied biological sciences. Psychology nuclear magnetic resonance spectroscopy thermal analysis wines Wines and vinegars X-ray diffraction |
| title | Analysis of Two Bentonites of Enological Interest before and after Commercial Activation by Solid Na2CO3 |
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