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Recently, we show that some demosponges (<jats:italic>Verongula gigantea, Aplysina<\/jats:italic> sp.) and glass sponges (<jats:italic>Farrea occa, Euplectella aspergillum<\/jats:italic>) possess chitin as a component of their skeletons. The main practical approach we used for chitin isolation was based on alkali treatment of corresponding external layers of spicules sponge material with the aim of obtaining alkali\u2010resistant compounds for detailed analysis. Here, we present a detailed study of the structural and physicochemical properties of spicules of the glass sponge <jats:italic>Rossella fibulata<\/jats:italic>. The structural similarity of chitin derived from this sponge to invertebrate alpha chitin has been confirmed by us unambiguously using physicochemical and biochemical methods. This is the first report of a silica\u2010chitin composite biomaterial found in <jats:italic>Rossella species<\/jats:italic>. Finally, the present work includes a discussion related to strategies for the practical application of silica\u2010chitin\u2010based composites as biomaterials.<\/jats:p>","DOI":"10.1155\/2008\/670235","type":"journal-article","created":{"date-parts":[[2008,4,3]],"date-time":"2008-04-03T17:05:45Z","timestamp":1207242345000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":42,"title":["Nanostructural Organization of Naturally Occurring Composites\u2014Part II: Silica\u2010Chitin\u2010Based Biocomposites"],"prefix":"10.1155","volume":"2008","author":[{"given":"Hermann","family":"Ehrlich","sequence":"first","affiliation":[]},{"given":"Dorte","family":"Janussen","sequence":"additional","affiliation":[]},{"given":"Paul","family":"Simon","sequence":"additional","affiliation":[]},{"given":"Vasily V.","family":"Bazhenov","sequence":"additional","affiliation":[]},{"given":"Nikolay P.","family":"Shapkin","sequence":"additional","affiliation":[]},{"given":"Christiane","family":"Erler","sequence":"additional","affiliation":[]},{"given":"Michael","family":"Mertig","sequence":"additional","affiliation":[]},{"given":"Ren\u00e9","family":"Born","sequence":"additional","affiliation":[]},{"given":"Sascha","family":"Heinemann","sequence":"additional","affiliation":[]},{"given":"Thomas","family":"Hanke","sequence":"additional","affiliation":[]},{"given":"Hartmut","family":"Worch","sequence":"additional","affiliation":[]},{"given":"John N.","family":"Vournakis","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2008,3,30]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"EhrlichH. 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