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In this investigation, wheat straw (WS) was extracted with petroleum ether (PE) and carbon disulfide (CS<jats:sub>2<\/jats:sub>) sequentially, to afford extractable fractions<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"normal\">E<\/mml:mi><mml:mi mathvariant=\"normal\">F<\/mml:mi><\/mml:mrow><mml:mrow><mml:mi mathvariant=\"normal\">P<\/mml:mi><mml:mi mathvariant=\"normal\">E<\/mml:mi><\/mml:mrow><\/mml:msub><\/mml:mrow><\/mml:math>and<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"normal\">E<\/mml:mi><mml:mi mathvariant=\"normal\">F<\/mml:mi><\/mml:mrow><mml:mrow><mml:mi mathvariant=\"normal\">C<\/mml:mi><mml:mi mathvariant=\"normal\">S<\/mml:mi><mml:mn mathvariant=\"normal\">2<\/mml:mn><\/mml:mrow><\/mml:msub><\/mml:mrow><\/mml:math>, respectively. Detailed componential analyses of<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M3\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"normal\">E<\/mml:mi><mml:mi mathvariant=\"normal\">F<\/mml:mi><\/mml:mrow><mml:mrow><mml:mi mathvariant=\"normal\">P<\/mml:mi><mml:mi mathvariant=\"normal\">E<\/mml:mi><\/mml:mrow><\/mml:msub><\/mml:mrow><\/mml:math>and<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M4\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"normal\">E<\/mml:mi><mml:mi mathvariant=\"normal\">F<\/mml:mi><\/mml:mrow><mml:mrow><mml:mi mathvariant=\"normal\">C<\/mml:mi><mml:mi mathvariant=\"normal\">S<\/mml:mi><mml:mn mathvariant=\"normal\">2<\/mml:mn><\/mml:mrow><\/mml:msub><\/mml:mrow><\/mml:math>were carried out with Fourier transform infrared (FTIR) spectroscopy, gas chromatography\/mass spectrometry (GC\/MS), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy dispersive spectrometry (EDS), and electron probe microanalysis (EPMA). Total extractives were quantified 4.96% by weight compared to the initial WS sample. FTIR and GC\/MS analyses results showed that PE was effective for the extraction of ketones and waxes derived compounds; meanwhile CS<jats:sub>2<\/jats:sub>preferred ketones and other species with higher degrees of unsaturation. Steroids were enriched into<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M5\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"normal\">E<\/mml:mi><mml:mi mathvariant=\"normal\">F<\/mml:mi><\/mml:mrow><mml:mrow><mml:mi mathvariant=\"normal\">P<\/mml:mi><mml:mi mathvariant=\"normal\">E<\/mml:mi><\/mml:mrow><\/mml:msub><\/mml:mrow><\/mml:math>and<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M6\"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=\"normal\">E<\/mml:mi><mml:mi mathvariant=\"normal\">F<\/mml:mi><\/mml:mrow><mml:mrow><mml:mi mathvariant=\"normal\">C<\/mml:mi><mml:mi mathvariant=\"normal\">S<\/mml:mi><mml:mn mathvariant=\"normal\">2<\/mml:mn><\/mml:mrow><\/mml:msub><\/mml:mrow><\/mml:math>with considerable high relative contents, namely, 64.52% and 79.58%, respectively. XPS analysis showed that most of the C atoms in extractives were contained in the structures of C-C, C-COOR, and C-O. TEM-EDS and EPMA analyses were used to detect trace amount elements, such as Al, Si, P, S, Cl, and Ca atoms. Detailed characterization of extractable species from WS can provide more information on elucidation of extractives in biomass.<\/jats:p>","DOI":"10.1155\/2017\/7305682","type":"journal-article","created":{"date-parts":[[2017,11,1]],"date-time":"2017-11-01T23:30:52Z","timestamp":1509579052000},"page":"1-9","source":"Crossref","is-referenced-by-count":4,"title":["Detailed Componential Characterization of Extractable Species with Organic Solvents from Wheat Straw"],"prefix":"10.1155","volume":"2017","author":[{"given":"Yong-Chao","family":"Lu","sequence":"first","affiliation":[{"name":"School of Basic Education Sciences, Xuzhou Medical University, Xuzhou 221004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4883-3733","authenticated-orcid":true,"given":"Yao","family":"Lu","sequence":"additional","affiliation":[{"name":"Advanced Analysis & Computation Center, China University of Mining & Technology, Xuzhou 221116, 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