Mildew in bamboo flour treated with different solvents
-
摘要: 为了研究竹材抽提物对竹粉霉变性能的影响,以冷水、热水、V(乙醇)∶V(乙醚)=1∶1,V(苯)∶V(乙醇)=1∶1,质量分数10 gkg-1盐酸(HCl)和10 gkg-1氢氧化钠(NaOH)溶液超声浸提处理后的竹粉为研究对象,测试了常见霉菌木霉Trichoderma viride,青霉Penicillium citrinum和黑曲霉Aspergillus niger等对其侵染能力。结果表明:用冷水、热水、醇/醚、苯/醇浸提后的竹粉试样对木霉、青霉和黑曲霉的防治效果均较低,与对照材相当;10 gkg-1盐酸和10 gkg-1氢氧化钠处理后竹材对以上3种霉菌的抵抗能力较强,其中10 gkg-1盐酸处理竹粉防霉效果最好。通过红外光谱分析浸提后的竹粉,发现表征多糖、木质素、半纤维素等成分的特征峰发生了改变。通过液相色谱分析浸提液中的糖分,发现除醇/醚浸提液外其他浸提液中葡萄糖与木糖总含量相差不大,但防霉效果相差很大,说明除了可溶性糖以外,竹粉中的其他成分对霉菌的生长和繁殖也有一定影响。图5表2参19
-
关键词:
- 木材科学与技术\竹粉 /
- 超声处理 /
- 溶剂浸渍 /
- 霉变性能
Abstract: To study the influence of bamboo extracts on mold properties of bamboo, bamboo flour was extracted using ultrasound with cold water, hot water, benzene/ethanol, ethanol/ether, 10 gkg-1 NaOH, and 10 gkg-1 HCl. The extracted bamboo flour was then used to conduct mold resistance tests against Trichoderma viride, Penicillium citrinum and Aspergillus niger. Results showed that bamboo flour treated with cold water, hot water, benzene/ethanol, or ethanol/ether had similar resistances; whereas when treated with 10 gkg-1 NaOH and especially 10 gkg-1 HCl, the results were much better than the controls, the mold did not grow. The FTIR analysis of extracted bamboo flour showed that the characteristic peaks of polysaccharides, lignin, and hemicellulose had changed. The HPLC analysis of the sugar in bamboo and in ethanol/ether extracts showed that glucose and xylose contents were similar, but the antifungal effects were different. Thus, in addition to soluble sugars, other bamboo powder ingredients probably had some influence on fungal growth and reproduction.[Ch, 5 fig. 2 tab. 19 ref.]-
Key words:
- wood science and technology /
- bamboo flour /
- ultrasonic treatment /
- immersion tests
-
链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2015.01.002
计量
- 文章访问数: 2596
- HTML全文浏览量: 436
- PDF下载量: 552
- 被引次数: 0