抗泥型葡萄糖改性聚羧酸减水剂的合成及其性能研究

以环氧氯丙烷为桥联剂,将葡萄糖与甲基烯丙基聚氧乙烯醚(HPEG)端羟基进行桥联制备葡萄糖改性聚醚大单体(GLC-CH-HPEG)。再将GLC-CH-HPEG分别以10%、20%、30%等摩尔比替代部分HPEG,合成葡萄糖改性聚羧酸减水剂(GLC-CH-PCE-10、GLC-CH-PCE-20、GLC-CH-PCE-30),通过^(1)H NMR、GPC和水泥净浆流动度试验研究其分子结构、分散性和抗泥性能,并探讨了蒙脱土(MMT)和葡萄糖改性聚羧酸减水剂作用机理。结果表明,在含3%MMT水泥净浆中,葡萄糖改性聚羧酸减水剂掺量为0.16%时具有良好的分散性和抗泥性。其中,GLC-CH-PCE-30的水泥净浆初始和60 min流动度分别为275和212 mm,而对照样(GLC-CH-PCE-0)仅为258和160 mm。

Fabrication of Ordered Meso-macroporous HPW/TiO_(2)Catalyst for Efficient Heterogeneous Oxidative Desulfurization

In order to reduce the emission of SO_x in the environment,sulfur compounds must be removed efficiently from fuels.Three-dimensional highly ordered meso-macroporous HPW/TiO_(2)(3DO m/M HPW/TiO_(2))materials were synthesized successfully by sol-gel method and applied as oxidative desulfurization catalyst for the model fuel.The characterization results displayed the existence of highly ordered meso-macroporous structures and the Keggin type of HPW was highly dispersed in TiO_(2)framework.The effect of catalyst on desulfurization under different reaction conditions was studied systematically.The results showed that the catalyst exhibited excellent desulfurization performance in the hydrogen peroxide oxidation system,which could be explained by the unique meso-macroporous structure of catalyst.In addition,the catalyst showed good cycling performance and the removal rate of DBT still reached 96.1%even after 6 cycles,providing a feasible method for the development and application of fuel deep desulfurization catalysts.

二叶亭四迷与鲁迅的翻译——以《我的翻译标准》为线索

鲁迅留学日本,直接或间接地接受了日本以及欧洲文艺思潮的洗礼,特别是受到了日本“言文一致”运动代表性人物二叶亭四迷的影响。在两者关于翻译的言论当中,小到语气措辞,大到翻译对象的选择、翻译方法的采用、对翻译本身的认识与思考,鲁迅与二叶亭均有相似之处。本文以二叶亭的《我的翻译标准》为线索,梳理两者翻译活动的轨迹,厘清二者的关联性,结合二人对翻译的言论、认识与观点,探究二叶亭的翻译活动对鲁迅翻译思想形成所带来的影响。

甲状腺癌颈淋巴结清扫联合迷走神经、桡神经浅支Ⅰ期吻合修复术1例

甲状腺乳头状癌临床上常见,生长缓慢,属于惰性肿瘤,较少侵犯周围神经。本文介绍1例患者因发现左颈部肿物伴声音嘶哑入院,颈部B超和CT提示双侧甲状腺结节恶性伴左侧颈部淋巴结转移,喉镜提示左侧声带麻痹。行常规双侧甲癌标准根治术+左侧根治性颈淋巴结清扫术,术中发现左颈中上群淋巴结侵犯迷走神经及颈内静脉,遂切除侵犯段神经和血管,于前臂锐性游离并离断桡神经浅支长约6.5 cm,将其移植于颈段缺失迷走神经处。术后恢复良好,未发生饮水呛咳、吞咽困难。