Mechanism of high antifungal effect of chitosan-metal salts of newly developed wood-preservative on wood.

新开发的木材防腐剂壳聚糖金属盐对木材的高效抗真菌作用机制。

• 批准号: 07456081
• 负责人: FURUKAWA Ikuo
• 金额: $ 2.11万
• 依托单位: TOTTORI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07456081/
• 关键词: post-CCA; chitosan-metal salts; antifungal effect; TYP; surface adhere; selective penetration; safeness; selective fungal attack; キトサン金属塩(CCS); スギ; 腐朽様式; 選択的菌糸侵入; 柔組織; 木材防腐剤; キトサン金属塩系薬剤; 薬剤分布; 固着性; 境界表面処理; 放射組織; post-CCA; chitosan-metal salts; antifungal effect; TYP; surface adhere; selective penetration; safeness; selective fungal attack; キトサン金属塩(CCS); スギ; 腐朽様式; 選択的菌糸侵入; 柔組織; 木材防腐剤; キトサン金属塩系薬剤; 薬剤分布; 固着性; 境界表面処理; 放射組織

In this study, the auther proposed a mechanism of high antifungal effects of chitosan-metal salts (CCS) on wood, which was newly developed wood-preservative in cooperation with Dr.T.Kobayashi, Toyo Wood Preservative Company. The micro-distribution (localization) of the CCS's effective component (copper metal) within the CCS-treated wood specimens, and the fungal behavior of TYP (Tyromyces palustris) within the CCS treated wood blocks in related to the copper-metal distribution by means of SEM-WDXA.As results, the copper metals were firmly bonded to the cell wall surfaces of the JIS wood-specimen even after the JIS-A9201 (1991) weathering treatments, and were localized on the opened lumen surfaces of the tracheids and selectively on the lumen surfaces within the ray parenchyma cells or axial parenchyma cells. When the CCS preservative was applied to the real-scaled timbers, the copper metals were only deposited in the few cell layrs at the surface portion of the treated timber. Nevertheless, the CCS treated woods showed prominently high resistance against the TYP fungal attacks. The TYP hyphae were inhibited selectively in the ray parenchyma cells or axial parenchyma cells, that was clalified by the SEM observation of the TYP rotted woods. Judgging from these evidences, it is clear that the CCS treatment were fundamentally differed from the CCA treatment, that is, the former is "specified cell surface adhere (deposition) type", but the latter is "all cell wall impregnation type". Then, the CCS treatments exhibited the high antifungal effects by means of the least amount of the copper metals in comparison with the CCA treatment, the requried chemicals of the CCS treatment were almost one tenth of the CCA treatment. As conclusion, newly developed CCS wood preservative will be strongly recommended as the post-CCA,because of both sides from safeness and effectiveness.

在这项研究中，Auther提出了一种对木壳盐（CC）对木材的高抗真菌作用的机制，该机制是与Toyo Wood防腐公司T.Kobayashi博士合作的新开发的木质保存。 The micro-distribution (localization) of the CCS's effective component (copper metal) within the CCS-treated wood specimens, and the fungal behavior of TYP (Tyromyces palustris) within the CCS treated wood blocks in related to the copper-metal distribution by means of SEM-WDXA.As results, the copper metals were firmly bonded to the cell wall surfaces of the JIS wood-specimen even after the JIS-A9201（1991）风化处理，并位于气管的打开的管腔表面，并在射线薄壁组织细胞或轴向实质细胞内有选择性地在管腔表面上。当将CCS防腐剂施加到实量的木材上时，铜金属仅沉积在处理过的木材表面部分的少数细胞层中。然而，CCS处理的树林对键入真菌攻击表现出了显着的高度抵抗力。在射线实质细胞或轴向实质细胞中选择性地抑制典型菌丝，这是通过对典型腐烂的木材的SEM观察来固定的。与这些证据相比，很明显，CCS处理与CCA处理根本不同，即，前者是“指定的细胞表面粘附（沉积）类型”，但后者是“所有细胞壁浸渍类型”。然后，与CCA处理相比，CCS处理通过最少的铜金属表现出很高的抗真菌作用，CCS处理的重新处理化学物质几乎是CCA处理的十分之一。最终，由于安全性和有效性，新开发的CCS木材防腐剂将被强烈推荐为CCA后CCA。