为了改善杨木高得率浆的配抄性能,扩大其应用范围,研究探讨了纤维素酶预处理对杨木碱性过氧化氢机械浆( APMP浆)配抄性能的影响。结果表明,与未经过酶预处理的杨木APMP浆相比,酶处理后 APMP 浆打浆能耗最大可降低19%,纤维吸水润胀程度增加,保水值增加12.6%；与不同比例针叶木漂白硫酸盐浆( BKP浆)配抄后,纸张的裂断长、耐破指数和撕裂指数均有所提高,最大可分别提高6.1%,44.6%和30.3%,纸张的松厚度、白度和不透明度稍有降低。纤维质量分析仪(FQA)、扫描电镜(SEM)和X射线衍射(XRD)分析结果显示,酶处理后纤维平均长度增加7.0个百分点,细小纤维组分减少10.0%,纤维卷曲指数降低22.4%,结晶度提高0.7%。可见,纤维素酶预处理可以改善杨木APMP浆的配抄性能,提高纸浆纤维质量,所配抄的纸张的物理强度性能指标有显著提高。

Cellulase pretreatment was utilized to treat the poplar alkaline peroxide mechanical pulp ( APMP) in present study to improve its papermaking performance and expand the application. The results showed that the beating energy consumption of the pretreated APMP decreased by 19% maximum and water retention value increased by 12. 6%, compared to the virgin APMP. Meanwhile, the breaking length, bursting index and tearing index of the papersheets, which were furnished by pretreated APMP and blended with different ratio of softwood bleached kraft pulp (BKP), increased maximum by 6. 1 %,44. 6 % and 30. 3%respectively. However, the bulk, brightness and the opacity were decreased slightly. The fiber quality analysis( FQA) , scanning electron microscope(SEM) and X-ray diffraction(XRD) were employed to characterize. The analysis results indicated that the fiber length increased by 7. 0%, the fines content decreased by 10. 0%, and the curl index decreased by 22. 4% compared with the pretr

目的比较椎体后凸成形术（BKP）治疗骨质疏松性椎体骨折（OVCFs）伴或不伴裂隙征（IVC）的疗效。方法回顾性分析50例行BKP治疗的OVCFs患者，按术前是否存在IVC分成两组，测量其术前、术后及末次随访时X线片伤椎前缘高度、伤椎中部高度及伤椎局部后凸角，观测骨水泥在伤椎内的分布形态及渗漏情况；采用VAS及ODI评分评估手术疗效。结果 IVC组与非IVC组术后及末次随访伤椎前缘高度、伤椎中部高度及伤椎局部后凸角均优于术前，IVC组伤椎前缘高度纠正、伤椎中部高度纠正及伤椎局部后凸角纠正均优于非IVC组。两组术后及末次随访VAS及ODI评分均较术前明显改善，而术后与末次随访相比，差异无统计学意义。骨水泥分布形态IVC组团块型占65.0％，非IVC组团块型占13.3％。IVC组椎间盘内渗漏3例，椎前渗漏1例；非IVC组椎前渗漏1例。结论 BKP对伴或不伴IVC的骨质疏松性椎体骨折均安全有效；伤椎椎体高度恢复及局部后凸角纠正，IVC组优于非IVC组；IVC组骨水泥分布以团块型为主，骨水泥渗漏以椎间盘内为主。

Objective To compare the outcomes of osteoporotic vertebral compression fractures with or without IVC treated by BKP. Method Fifty patients with OVCFs underwent BKP between January 2009 and June 2013. We divided the fifty patients into two groups according to the existence of IVC. The kyphotic angle,anterior and middle vertebral height were measured on lateral radiographs at preoperatively,postoperatively and final follow-up. Cement distrubution patterns and leakage were also accessed on postoperative radiographs or CT scans.Visual analog scale(VAS)and Oswestry disability index(ODI)scores were used to evaluate pain and function results. Results The two groups both had significant correction of kyphotic angle as well as anterior and middle vertebral height restoration.But the restoration of kyphotic angle and vertebral height in group with IVC were better than group without IVC.In addition,both groups had significant improvement of VAS and ODI scores.Lump cement pattern accounted for 65

选取不同制浆方式的浆种和不同种类的植物纤维进行实验,考察其对造纸法烟草基片物理性能的影响,选取效果较好的外加纤维进行复配,确定外加纤维种类并对其添加量进行优化。实验结果发现:采用木素含量低的阔叶木漂白硫酸盐浆、针叶木漂白硫酸盐浆、#1木浆、#2木浆、漂白龙须草浆对改善烟草基片的物理性能和降低烟草薄片的有害物质比较有效;实验最终确定添加20%漂白硫酸盐木浆(针叶木漂白硫酸盐浆∶阔叶木漂白硫酸盐浆=1∶1),在改善烟草基片物理性能的同时显著降低了烟草薄片中的有害物质。

Pulps by different pulping process and plant fibers of different kinds were used to study the impacts on the physical properties of paper-process reconstituted tobacco. Then the kind of additional wood fiber and its adding proportion were optimized with confirmed wood pulps. The results show that it is effective to improve physical properties and lower combustion of hazardous substances of the tobacco sheet by adding pulps with lower content of lignin such as BSKP, BHKP, pulp 1, pulp 2 and the bleached binata pulp. The optimal experiment scheme was achieved with 20%of BKP ( BSKP∶BHKP=1∶1) added, which can effectively improve physical properties and lower combustion of hazardous substances of the tobacco sheet.