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首页> 外文期刊>Holzforschung >Structural features of macromolecular components of cork from Quercus suber L.
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Structural features of macromolecular components of cork from Quercus suber L.

机译:从栎(Cork)Quercus suber L.大分子成分的结构特征。

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The structural features of macromolecular components of cork (suberin, lignin, cellulose and hemicelluloses) from Quercus suber L. used for the production of stoppers were assessed after their isolation and purification. Suberin is the major component of cork (ca. 44%) and is constituted mainly by hydroxy fatty acids (C-14-C-26). Cork lignin was found to be highly condensed (16.2%) and revealed a syringyl:guaiacyl:p-hydroxyphenyl (S:G:H) ratio of 26:71:3 with predominant beta-O-4' (0.38%), beta-5', beta-beta and tetrahydrofuran (THF) type (totally ca. 27%) structures. Cork lignin also has a remarkable amount of ferulic acid structures, which are considered the binding point between lignin and suberin. The cellulose of cork cells (17.2%) is a typical cellulose I polymorph with a degree of crystallinity (DC) of 70.3% and an average crystallite width of 3.5 nm. The major hemicellulose of cork is glucuronoxylan (near 6.0%) possessing a molar Xylp:MeGlcpA ratio of 14:1.
机译:从Quercus syber L.用于生产止血剂的栎(Suberin,Lignin,纤维素和半纤维素)的大分子成分的结构特征在其分离和纯化后进行了用于生产止血剂。 Suberin是软木(CA.44%)的主要成分,主要由羟基脂肪酸(C-14-C-26)构成。被发现软木木质素被发现高度浓缩(16.2%)并揭示了一种注射器:Guaiacyl:P-羟基苯基(S:G:H)比例为26:71:3,具有主要的β-O-4'(0.38%),β -5',β-β和四氢呋喃(THF)型(完全CA.27%)结构。软木木质素还具有显着数量的阿魏酸结构,被认为是木质素和Suberin之间的结合点。软木细胞(17.2%)的纤维素是典型的纤维素I多晶型物,其结晶度(DC)为70.3%,平均微晶宽度为3.5nm。软木塞的主要半纤维素是葡萄糖氧基氧基(接近6.0%),具有摩尔Xylp:meglcpa比为14:1。

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