Conclusion The changes of ash bark bacteriostasis were basically identical with known coumarin component content.

结论秦皮抑菌强弱与已知香豆素成分含量高低基本一致。

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Aglycone bacteriostasis of ash bark was superior to glycoside, fraxetin and aesculetin bacteriostasis were most powerful in 5 kinds of coumarin monomer.

秦皮中苷元的抑菌作用优于苷，5种香豆素类单体中秦皮素、秦皮乙素抑菌作用最强。

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Result showed that each tree specie has a low ash content in trunk and a slight difference in ash contents of bark and branch.

研究结果表明，各树种均以干部灰分含量为最低，树皮和枝部灰分含量差异不大；

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In younger ash there is a distinctive smooth silver grey bark and sooty black buds.

BBC: The heartbreak of watching the slow death of ash trees

Officials are planning future beetle surveys and will try to limit the infestation with "girdling, " in which thick strips of bark are removed from around infested ash trees.

WSJ: Mass. creates quarantine zone to contain insect

The emerald ash borer is metallic green and eats only ash trees, with the larvae feeding just below the bark and adults eating the leaves.

WSJ: Mass. creates quarantine zone to contain insect