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首页> 外文期刊>Journal of Wood Chemistry and Technology >Copaifera langsdorffii Bark as a Source of Chemicals: Structural and Chemical Characterization
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Copaifera langsdorffii Bark as a Source of Chemicals: Structural and Chemical Characterization

机译：兰pa树皮作为化学物质的来源：结构和化学特征

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The chemical composition and the anatomy of Copaifera langsdorffii bark are reported here for the first time by studying trees grown in a native forest area in the Amazon region, Brazil. The bark is thin, dark reddish brown, and exfoliates in irregular flakes. It is very dense, showing highly lignified cells and abundant sclereids, and cellular fillings of phenolic nature. It includes a poorly developed rhytidome and a periderm with thin- and thick-walled phellem cells. The mean chemical composition was: ash 3.7%, total extractives 21.3%, mainly corresponding to polar compounds soluble in ethanol and water, suberin 0.8%, and lignin 36.6%. The polysaccharides showed a predominance of glucose and xylose (66.4% and 23.5% of total monosaccharides, respectively). The ethanol-water bark extract had a high content in phenolics: total phenolics 589.2mg gallic acid/g extract, flavonoids 441.9mg catechin/g extract, and tannins 54.8mg catechin/g extract. The antioxidant activity was high, comparable to known antioxidant reference compounds: 720.3mg Trolox per g of extract or 92.1mg Trolox per g of bark. After bark grinding, the finest fraction was enriched in polar extractives (40.6%). C. langsdorffii bark is a potential source of functional extractives, therefore representing a valorization of the residual bark obtained during the industrial tree processing for timber.
机译：本文是通过研究巴西亚马逊地区原生林区中生长的树木，首次报道了Copaifera langsdorffii树皮的化学成分和解剖结构。树皮薄而深棕红色，在不规则的薄片中脱落。它非常致密，显示高度木质化的细胞和丰富的硬化细胞，以及酚性的细胞填充物。它包括一个发育不良的节律器和一个薄壁和厚壁的胶体细胞的周皮。平均化学组成为：灰分3.7％，总提取物21.3％，主要对应于溶于乙醇和水的极性化合物，木栓质0.8％和木质素36.6％。多糖显示出葡萄糖和木糖的优势（分别占总单糖的66.4％和23.5％）。乙醇-水树皮提取物中的酚含量很高：总酚含量为589.2mg没食子酸/ g提取物，黄酮类化合物441.9mg儿茶素/ g提取物和单宁酸54.8mg儿茶素/ g提取物。与已知的抗氧化剂参考化合物相比，其抗氧化活性很高：每克提取物720.3mg Trolox或每克树皮92.1mg Trolox。树皮研磨后，最细的部分富含极性萃取物（40.6％）。兰斯多菲树皮是功能性提取物的潜在来源，因此代表了木材工业树木加工过程中获得的残留树皮的价值。

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