In addition to my previous three questions, I also have the following question. The sentence you edited (see below) is not familar with me. Can you please check to make sure it is correct? thanks.<br /><br />
<p>One scenario entails siloxanes, when present with other contaminants and moisture, catalyzed in the presence of metal ions and undergoing cleaving of the backbone, or depolymerization (Marshall, 2012).</p>