胃癌病人全胃切除术后早期经口营养与空肠营养管肠内营养的对比研究

目的:探讨胃癌病人全胃切除术后早期经口肠内营养的安全性与可行性。方法:选择行腹腔镜辅助根治性全胃切除术的胃癌病人,依照肠内营养方式不同分为早期经口营养(无营养管组,25例)和经空肠营养管肠内营养(有营养管组,23例)。分析比较2组病人术后并发症发生情况、术后应激反应指标、术后营养指标、术后肠道屏障功能指标、术后排气时间及术后住院时间。结果:2组病人在术后营养指标、术后排气时间及住院时间方面差异均无统计学意义,在术后咽喉疼痛、腹泻发生率方面,无营养管组明显优于有营养管组(P<0.01和P<0.05),且术后C反应蛋白水平、血D-乳酸和I-FABP水平,无营养管组均低于有营养管组(P<0.05~P<0.01)。结论:对于全胃切除的胃癌病人,与经鼻空肠营养管肠内营养相比,早期经口营养是安全的,并能减少病人咽部不适、腹泻的发生率,减轻机体应激反应,促进机体肠道屏障功能修复。

三阴性乳腺癌的上皮间质转化及自噬特性差异的研究

目的:探讨三阴性乳腺癌(TNBC)的上皮间质转化(EMT)及自噬特性的差异。方法:选取TNBC细胞株BT-549与非TNBC细胞株MCF-7,分别对比其EMT及自噬特性。通过细胞形态,平板克隆,Transwell侵袭实验,Western blotting实验测定其EMT的差异,通过电镜观察自噬体,免疫荧光实验,Western blotting实验测定其自噬特性。结果:TNBC增殖性和侵袭性强于非TNBC,TNBC组间质细胞标志物N-cadherin、Vimentin、β-catenin相对高表达,非TNBC组上皮细胞标志物E-cadherin相对高表达。电镜下,非TNBC细胞线粒体自噬,TNBC组自噬微管相关蛋白1轻链3相对高表达。结论:TNBC增殖性、侵袭性皆强于非TNBC,EMT及自噬化程度均较高。

High light-extraction-efficiency OLED based on photonic crystal slab structures with taper unit cells

To improve the light-extraction-efficiency of OLED,we introduced PCS (Photonic Crystal Slab) structures into the interface of ITO layer and glass substrate.PCS structures with Taper unit cells are proved to be effective in reducing the energy of guided wave trapped in high refractive index material,and an increase of light-extraction-efficiency to 95.26% is gained.This enhancement is much greater than the traditional PCS with cylinder unit cells (60%-70%).Physical mechanisms of light-extraction-efficiency enhancement in these structures are further discussed.

Light Extraction Efficiency in OLED with Sub-wavelength Structures

By simulating with finite-difference time-domain(FDTD) method, it is proved that two kinds of new photonic crystal slab(PCS) structures could enhance the light extraction efficiency of OLED. By comparing the results, the most effective PCS structure with maximum light extraction efficiency(E_ r =1.99) is got. The optimized geometric parameters and optimized performance parameters of the PCS structures are also obtained.