div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Environmental SEM premières src=https:reader031fdocumentsfrreader031viewer20220117215750687f1a28ab0f07b06e2fhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1989 Nature Publishing Grouppdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Environmental SEM premières src=https:reader031fdocumentsfrreader031viewer20220117215750687f1a28ab0f07b06e2fhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divp© 1989 Nature Publishing Grouppdiv