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Bark residues valorization potential regarding antioxidant and antimicrobial extracts
Wood Science and Technology ( IF 3.4 ) Pub Date : 2020-03-09 , DOI: 10.1007/s00226-020-01168-3
Duarte M. Neiva , Ângelo Luís , Jorge Gominho , Fernanda Domingues , Ana P. Duarte , Helena Pereira

Bark residual side streams from industries ( Eucalyptus globulus —Eg and Picea abies —Pa) or from control of invasive species in Mediterranean countries ( Acacia melanoxylon —Am and Acacia dealbata —Ad) are burned for energy production, although their high content of extractable compounds points to a possible valorization as sources of phytochemicals with antioxidant and antimicrobial activities. Non-polar and polar extracts were obtained, and their phenolic contents, antioxidant activity, antiquorum sensing and antimicrobial potential against several human pathogenic microbes (nine bacteria and two yeasts) were determined. Extraction yield ranged from 0.5 to 37% of barks dry weight varying with species and solvent used, and both water and ethanol extracts presented strong or very strong scavenging antioxidant ability. Eg and Pa non-polar extracts showed the lowest minimum inhibitory concentration for gram-positive bacteria (0.04–1.25 mg/mL), while Ad presented the best results among polar extracts regarding bacteria (0.16 mg/mL for K. pneumoniae ) and yeast strains (0.02–0.04 mg/mL). Non-polar extracts showed great response against both Candida species (MIC = 0.04–0.63 mg/mL). Each extract had different antimicrobial activity showing that species and solvents can be used to tailor compounds to target specific pathogens. Information regarding these bioactive extracts from residual forest side streams can provide possible utilization routes for natural compounds recovery prior to combustion.

中文翻译:

抗氧化和抗微生物提取物的树皮残留物增值潜力

来自工业(Eucalyptus globulus —Eg 和 Picea abies —Pa)或地中海国家控制入侵物种(Acacia melanoxylon —Am 和 Acacia dealbata —Ad)的树皮残余侧流被燃烧用于能源生产,尽管它们的可提取化合物含量很高指出作为具有抗氧化和抗微生物活性的植物化学物质来源的可能价值。获得了非极性和极性提取物,并测定了它们的酚类含量、抗氧化活性、抗微生物感应和对几种人类病原微生物(九种细菌和两种酵母菌)的抗菌潜力。提取率在树皮干重的 0.5% 到 37% 不等,因物种和所用溶剂而异,水和乙醇提取物都表现出很强或非常强的清除抗氧化能力。Eg 和 Pa 非极性提取物对革兰氏阳性菌的最低抑菌浓度最低(0.04–1.25 mg/mL),而 Ad 在极性提取物中对细菌(肺炎克雷伯菌为 0.16 mg/mL)和酵母的抑制效果最好菌株 (0.02–0.04 mg/mL)。非极性提取物对两种念珠菌都表现出很好的反应(MIC = 0.04–0.63 mg/mL)。每种提取物都具有不同的抗菌活性,表明物种和溶剂可用于定制化合物以针对特定病原体。有关这些来自残余森林支流的生物活性提取物的信息可以为燃烧前的天然化合物回收提供可能的利用途径。而 Ad 在极地提取物中关于细菌(肺炎克雷伯菌 0.16 毫克/毫升)和酵母菌株(0.02–0.04 毫克/毫升)的最佳结果。非极性提取物对两种念珠菌都表现出很好的反应(MIC = 0.04–0.63 mg/mL)。每种提取物都具有不同的抗菌活性,表明物种和溶剂可用于定制化合物以针对特定病原体。有关这些来自残余森林支流的生物活性提取物的信息可以为燃烧前的天然化合物回收提供可能的利用途径。而 Ad 在极地提取物中关于细菌(肺炎克雷伯菌 0.16 毫克/毫升)和酵母菌株(0.02–0.04 毫克/毫升)的最佳结果。非极性提取物对两种念珠菌都表现出很好的反应(MIC = 0.04–0.63 mg/mL)。每种提取物都具有不同的抗菌活性,表明物种和溶剂可用于定制化合物以针对特定病原体。有关这些来自残余森林支流的生物活性提取物的信息可以为燃烧前的天然化合物回收提供可能的利用途径。每种提取物都具有不同的抗菌活性,表明物种和溶剂可用于定制化合物以针对特定病原体。有关这些来自残余森林支流的生物活性提取物的信息可以为燃烧前的天然化合物回收提供可能的利用途径。每种提取物都具有不同的抗菌活性,表明物种和溶剂可用于定制化合物以针对特定病原体。有关这些来自残余森林支流的生物活性提取物的信息可以为燃烧前的天然化合物回收提供可能的利用途径。
更新日期:2020-03-09
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