首页> 外文会议>2002 TAPPI Fall technical conference and trade fair >MECHANISMS OF OXIDATIVE DEGRADATION OF CARBOHYDRATES DURING OXYGENDELIGNIFICATION. III. REACTION OF PHOTOCHEMICALLY GENERATED HYDROXYLRADICALS WITH 1,5-ANHYDROCELLOBITOL AND CELLULOSE

【24h】

MECHANISMS OF OXIDATIVE DEGRADATION OF CARBOHYDRATES DURING OXYGENDELIGNIFICATION. III. REACTION OF PHOTOCHEMICALLY GENERATED HYDROXYLRADICALS WITH 1,5-ANHYDROCELLOBITOL AND CELLULOSE

机译：氧脱木素过程中碳水化合物的氧化降解机理。三，光化学生成的羟基自由基与1,5-羟基胆固醇和纤维素的反应

获取原文

页面导航

摘要
著录项
相似文献
相关主题

摘要

Hydroxyl radicals, generated photochemically from hydrogen peroxide in aqueous base, have been shown to cleavedirectly glycosidic linkages in methyl β-D-glucoside and methyl β-cellobioside [1,2]. In this paper we show thathydroxyl radicals are responsible for the degradation of glycosidic linkages in 1,5-anhydrocellobitol and 2-methoxytetrahydropyran by substitution reactions displacing 1-deoxyglucose, D-glucose, tetrahydropyran-2-ol, andmethanol. Once the glycosidic linkages are broken, reducing carbohydrates undergo a series of reactions formingaldonic acids and lower order aldoses in the same manner as described previously [1,2]. Under these sameconditions, hydroxyl radicals degrade cellulose substantially as evidenced by viscosity loss.

机译：已显示由碱水溶液中的过氧化氢以光化学方式产生的羟基自由基会裂解甲基β-D-葡萄糖苷和甲基β-纤维二糖苷中直接糖苷键[1,2]。在本文中，我们表明羟基自由基负责降解1，5-脱水纤维糖醇和2中的糖苷键甲氧基四氢吡喃通过取代反应取代1-脱氧葡萄糖，D-葡萄糖，四氢吡喃-2-醇和甲醇。糖苷键一旦断裂，还原性碳水化合物就会经历一系列反应，形成醛糖酸和低级醛糖的制备方法与以前[1,2]相同。在这些相同的情况下在一定条件下，羟基粘度会大大降低纤维素的降解能力，这可以通过粘度损失来证明。

著录项

来源
《2002 TAPPI Fall technical conference and trade fair》|2002年|p.1-10|共10页
会议地点
作者
D. F. Guay; B. J. W. Cole; R. C. Fort Jr.; M. C. Hausman; J. M. Genco; T. J. Elder;
展开▼
作者单位

展开▼
会议组织
原文格式 PDF
正文语种
中图分类造纸工业;
关键词

相似文献

外文文献
中文文献
专利

1. MECHANISMS OF OXIDATIVE DEGRADATION OF CARBOHYDRATES DURING OXYGEN DELIGNIFICATION. II. REACTION OF PHOTOCHEMICALLY GENERATED HYDROXYL RADICALS WITH METHYL β-CELLOBIOSIDE [J] . D.F.Guay, B.J.W.Cole, R.C.Fort Journal of Wood Chemistry and Technology . 2001,第1期

机译：氧气脱木素过程中碳酸盐的氧化降解机理。二。光化学生成的羟基自由基与甲基β-胞嘧啶的反应
2. Unusually Facile Thermal Homodienyl-[1,5]-Hydrogen Shift Reactions in Photochemically Generated Vinyl Aziridines [J] . Knowles Jonathan P., Booker-Milburn Kevin I. Chemistry: A European journal . 2016,第32期

机译：光化学生成的乙烯基氮丙啶中异常容易的热同二烯基-[1,5]-氢转移反应
3. Degradation mechanisms of poly(methyl acrylate) - III. And assessment of the participation of secondary reactions from the dependence of pyrolysis yields on sample thickness [J] . R.S.Lehrle, E.J.place Polymer Degradation and Stability . 1997,第3期

机译：聚（丙烯酸甲酯）的降解机理-III。并根据热解产率对样品厚度的依赖性评估次级反应的参与
4. MECHANISMS OF OXIDATIVE DEGRADATION OF CARBOHYDRATES DURING OXYGEN DELIGNIFICATION. III. REACTION OF PHOTOCHEMICALLY GENERATED HYDROXYL RADICALS WITH 1,5-ANHYDROCELLOBITOL AND CELLULOSE [C] . D. F. Guay, B. J. W. Cole, R. C. Fort Jr., Technical Association of the Pulp and Paper Industry technical conference and trade fair . 2002

机译：氧化氧化物氧化水合物氧化降解的机制。 III。用1,5-氢烯烃和纤维素的光学生成的羟基自由基反应
5. Mechanisms of oxidative degradation of carbohydrates during oxygen delignification. [D] . Guay, Donald Francis. 1999

机译：氧脱木质素过程中碳水化合物的氧化降解机理。
6. Control Mechanisms Operative in a Natural Microbial Population Selected for Its Ability to Degrade L-Lysine. III. Effects of Carbohydrates in Continuous-Flow Systems Under Shock Load Conditions [O] . C. P. L. Grady Jr., A. F. Gaudy Jr. 1969

机译：选择的自然微生物种群具有降解L-赖氨酸的能力的控制机制。三冲击载荷条件下连续流系统中碳水化合物的影响
7. Unusually Facile Thermal Homodienyl-[1,5]-Hydrogen Shift Reactions in Photochemically-Generated Vinyl Aziridines [O] . Knowles, Jonathan P, Booker-Milburn, Kevin I 2016

机译：光化学生成的乙烯基氮丙啶中异常容易的热同二烯基-[1,5]-氢转移反应

MECHANISMS OF OXIDATIVE DEGRADATION OF CARBOHYDRATES DURING OXYGENDELIGNIFICATION. III. REACTION OF PHOTOCHEMICALLY GENERATED HYDROXYLRADICALS WITH 1,5-ANHYDROCELLOBITOL AND CELLULOSE

摘要

著录项

相似文献

相关主题

期刊订阅