Positive-working thermally imageable elements, useful as printing plate precursors and having reduced ablation when thermally imaged, and methods for their preparation are disclosed.

本发明公开了用作印刷板前体、并在时具有较少烧蚀作用的正性件及其制备方法。

In this study a series of different maturation degree coals are yielded by thermally treating a lowgrade lignite, and are used as the sorbents for sorption equilibrium study of phenanthrene.

将云南先锋褐煤采用模拟的实验方法制得一组熟度不同的煤,并将煤中的干酪根用于对菲的吸附研究。