Abstract The possibility of using coffee silverskin, an industrial waste from the coffee roasting process, as an antifungal feedstock in wood preservative formulations was investigated. Silverskin hot water extract and its antifungal properties in vitro against Rhodonia (Poria) placenta, Gloeophyllum trabeum, and Trametes versicolor were characterized, and its in vitro effects on wood decay caused by Coniophora puteana were analyzed. A kinetic luminescent bacteria test was performed using Aliivibrio fischeri to measure the acute ecotoxicity of the silverskin extracts. The antifungal test showed 60–70% growth inhibition of the studied fungi at higher concentrations—3%—but did not meet the high inhibition—100%—of the commercial wood preservative. The phenolic compounds, such as chlorogenic acid and its derivatives, and caffeine derivatives, were the main constituents of the silverskin extracts and considered the responsible compounds of the fungal inhibition. The silverskin extracts were significantly less toxic than the commercial copper-based wood preservative. Revalorization of silverskin from industrial residues does not perform as a wood preservative but it remains a potential source of antifungal chemicals for wood preservative formulations.

中文翻译：

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咖啡银皮作为木材防腐中抗真菌化学品的潜在原料的重新评价

摘要 研究了使用咖啡银皮（一种来自咖啡烘焙过程的工业废物）作为木材防腐剂配方中的抗真菌原料的可能性。对银皮热水提取物及其体外对红曲霉 (Poria) 胎盘、Gloeophyllum trabeum 和花斑栓菌的抗真菌特性进行了表征，并分析了其体外对 Coniophora puteana 引起的木材腐烂的影响。使用 Aliivibrio fischeri 进行动力学发光细菌测试，以测量银皮提取物的急性生态毒性。抗真菌试验表明，在较高浓度（3%）下，所研究的真菌具有 60-70% 的生长抑制作用，但不符合商业木材防腐剂的 100% 高抑制作用。酚类化合物，如绿原酸及其衍生物和咖啡因衍生物，是银皮提取物的主要成分，被认为是真菌抑制的主要化合物。银皮提取物的毒性明显低于商用铜基木材防腐剂。从工业残留物中重新评估银皮并不能作为木材防腐剂，但它仍然是木材防腐剂配方中抗真菌化学品的潜在来源。