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青若

至尊木虫 (文坛精英)

落霞与孤鹜齐飞,秋水共长天一色。
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青若

至尊木虫 (文坛精英)

引用回帖:
4楼: Originally posted by 美博翻译 at 2013-10-29 16:15:08
哦,那就是“硫酸盐木素”...

谢谢
落霞与孤鹜齐飞,秋水共长天一色。
5楼2013-10-29 16:20:17
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美博翻译

银虫 (小有名气)


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青若: 金币+5, 翻译EPI+1, ★★★很有帮助 2013-10-29 16:22:05
请您把上下文或者您的领域告知一下,这个词语涉及两个领域的,化学:碱木质素,林业:硫酸盐木素,如有上下文更好。
2楼2013-10-29 11:53:27
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青若

至尊木虫 (文坛精英)

引用回帖:
2楼: Originally posted by 美博翻译 at 2013-10-29 11:53:27
请您把上下文或者您的领域告知一下,这个词语涉及两个领域的,化学:碱木质素,林业:硫酸盐木素,如有上下文更好。

Kraft lignins can be precipitated and extracted from the black liquor in a two-step acidification process. First, carbon dioxide is used to reduce the pH of the liquor till 9–10, and about 75% of the lignin is precipitated as a sodium salt . For further purification, this lignin is suspended in water and acidified with H2SO4 to a pH lower than 3. The commercial Kraft lignins are generally sold in the sulphonated form or as lignin amines. The physical properties for softwood Kraft lignins and softwood lignosulphonates can be found elsewhere . Lignosulphonates (M.W. 20,000–50,000) have higher molecular
weight and lower content in free phenolic hydroxyl groups than Kraft lignins (M.W. 2000–3000). The content in free phenolic hydroxyl groups of Kraft lignins is especially rich with values around 3.1meqg−1 . This functional group plays an important role in the dissolutionof macromolecules.

生物偏有机化学方向
落霞与孤鹜齐飞,秋水共长天一色。
3楼2013-10-29 16:07:40
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美博翻译

银虫 (小有名气)


引用回帖:
3楼: Originally posted by 青若 at 2013-10-29 16:07:40
Kraft lignins can be precipitated and extracted from the black liquor in a two-step acidification process. First, carbon dioxide is used to reduce the pH of the liquor till 9–10, and about 75% of t ...

哦,那就是“硫酸盐木素”
4楼2013-10-29 16:15:08
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