Unusual Boron-Carbon Compounds Containing Planar Tetracoordinate and Pentacoordinate Carbons

采用密度泛函理论(dfT),在b3lyP/6-311+g**水平上,研究了三类包含平面四配位碳原子(PTC)和平面五配位碳原子(PPC)的硼碳化合物.这三类新型化合物是由C3b2H4(包含PTC)、Cb4H2(包含PTC)和Cb5H2(包含PPC)三种稳定结构和—CHCH—单元连接起来而得到的.在理论上探讨了这些新型的硼碳化合物的成键特征,光谱性质以及芳香性.研究结果表明:包含PTC和PPC原子的能量最低的结构,在不受对称面限制的条件下,具有C2V对称性的顺式立体构型比具有反式平面构型的化合物稳定.计算的核独立化学位移(nICS)显示,这些新型化合物的三元环中心有强的芳香性.计算最稳定硼碳化合物的PTC和PPC原子的WIbErg键指数(WbIS)表明PTC和PPC的成键遵循八隅规则.Unusual boron-carbon compounds containing planar tetracoordinate carbon (ptC) and planar pentacoordinate carbon (ppC) were investigated using density functional theory (DFT) at B3LYP/6-311+G** level.These novel compounds are generally assembled with three types of stable structural units C3B2H4 with ptC, CB4H2 with ptC, and CB5H2 with ppC as well as linking elements—CHCH—.On the basis of calculation results the bonding features, spectroscopic properties, and the aromaticities of these novel boron-carbon compounds were discussed.Results show that as for the lowest-energy compounds contained ptC and ppC without being limited by symmetrical planes, stereo cis-structures of C2v symmetry are more stable than the corresponding planar trans-structures.Calculated nucleus-independent chemical shift (NICS) values show that the aromaticity of the center of the three-membered rings is the strongest.The total Wiberg bond indices (WBIs) of the ptC and ppC atoms of the most stable structures of the boron-carbon compounds indicate that the ptC and ppC obey the octal rule.supportedbytheExcellentSciencePre-researchProjectofShaanxiNormalUniversity(China)in2008---

Experimental effects study of total flavonoids of Ajuga on nuclear transcriptional factor of kappa B in mesangial proliferative glomerulonephritis rats

目的探讨筋骨草总黄酮(TfA)治疗系膜增生性肾小球肾炎(MSPgn)大鼠后核转录因子-κb(nf-κb)及下游转化生长因子-β1(Tgf-β1)的变化。方法采用改良慢性血清病MSPgn大鼠模型,于造模第5周末检测尿蛋白,将尿蛋白阳性者随机分为模型组、雷公藤多甙(TWP)组、不同剂量TfA组。于造模第6周开始给药,6周后,测定各组大鼠的24 H尿蛋白定量、血生化和肾组织病理变化,MAXVISIOnTM即用型快速免疫组化一步法检测大鼠肾组织中nf-κb P65的表达,双抗体夹心法检测血清中Tgf-β1的变化。结果 TfA可显著降低尿蛋白,明显减小系膜区面积占毛细血管丛面积的百分比(P0.05)。模型对照组大鼠肾组织nf-κb P65、血清Tgf-β1的表达明显高于正常对照组[nf-κb P65:28.93±4.45 VS.4.51±0.96,P0.05).The renal tissue NF-κB(Integral optical density, IOD) and serum TGF-β1(pg/ml) in model control was significantly higher than that in normal control group, NF-κB p65 28.93±4.45 vs.4.51±0.96, P<0.01; TGF-β1:(247.63±51.55)pg/ml vs.(127.52±27.84)pg/ml, P<0.01; With the intervention trerapy of high-dosage TFA, middle-dosage TFA and TWP, the expression of NF-κB in renal tissue and TGF-β1 in serum was significantly decreased compared with model control group, NF-κB p65: 10.35±2.81, 15.21±4.71,11.70±3.97, P<0.01; TGF-β1:(181.96±52.93)pg/ml,(204.33±38.30)pg/ml,(188.07±42.92)pg/ml, P<0.05.Conclusion Reducing the expression of NF-κB and successive TGF-β1 may be one of the mechanisms of total flavonoids of Ajuga treatment on MsPGN rats.福建省卫生厅中医药科研重点课题(wzzsb0906); 陈可冀中西医结合发展基金·福建省中西医结合老年性疾病重点实验室开放课题资助项目(CKJ2008088); 福建中医药大学校管课题(X2009069

Unusual Boron-Carbon Compounds Containing Planar Tetracoordinate and Pentacoordinate Carbons

Unusual boron-carbon compounds containing planar tetracoordinate carbon (ptC) and planar pentacoordinate carbon (ppC) were investigated using density functional theory (DFT) at B3LYP/6-311+G * * level. These novel compounds are generally assembled with three types of stable structural units C3B2H4 with ptC, CB4H2 with ptC, and CB5H2 with ppC as well as linking elements -CHCH-. On the basis of calculation results the bonding features, spectroscopic properties, and the aromaticities of these novel boron-carbon compounds were discussed. Results show that as for the lowest-energy compounds contained ptC and ppC without being limited by symmetrical planes, stereo cis-structures of C-2v symmetry are more stable than the corresponding planar trans-structures. Calculated nucleus-independent chemical shift (NICS) values show that the aromaticity of the center of the three-membered rings is the strongest. The total Wiberg bond indices (WBIs) of the ptC and ppC atoms of the most stable structures of the boron-carbon compounds indicate that the ptC and ppC obey the octal rule.Excellent Science Pre-research Project of Shaanxi Normal University (China

The comparison study of Display film business model of company A and company B

摘要 显示技术及显示器件在信息技术的发展过程中占据了十分重要的地位。自20世纪90年代以来，随着技术的突破及市场需求的急剧增长，以液晶显示（LCD）为代表的平板显示（FPD）技术迅速崛起，成为21世纪显示技术的主流，其产业和市场在不断扩展之中，同时，该行业的竞争也十分激烈。 作为平板显示系统的重要组件，增光膜业务也面临着广阔的发展前景，特别是在以中国为首的经济发展迅速的亚洲地区。作为其业务转型的一个组成部分，A公司在21世纪初进行了增光膜的研发，并在2006年初开始进军大陆市场。增光膜市场全球霸主3M公司的长期技术垄断所造就的市场份额的优势和大规模生产成本优势对于A公司和新进入者制造了...Abstract Display technology and display component technology occupied crucial position in the development of the information technology. Starting from 1990s, together with technology breakthrough and significant demand climbing, the FPD related business represented by LCD(liquid Crystal Display) material emerged quickly and became the main stream technology in FPD field. The industry and market ...学位：工商管理硕士院系专业：管理学院工商管理教育中心（MBA中心）_工商管理硕士(MBA)学号：1552005130141

The Effects of Job Incumbents＇Task Performance on Their Job Analysis Ratings： Evidence From Power Plant Designers and Editors

在控制了个体人口统计学变量和排除组织水平变量的影响下，探讨了电厂设计和编辑两个职位任职者的任务绩效水平对于他们Occupational Information Network（以下缩写为O＊NET）工作分析问卷评价结果的影响。层次回归结果发现，控制了相关因素后，发电厂设计人员的任务绩效水平显著影响其对技术性技能的水平评价，编辑的任务绩效水平显著影响信息处理的重要性评价和水平评价，在一定程度上证实了“工作分析结果差异来源于真实差异”的理论

The Effects of Job Incumbents Task Performance on Their Job Analysis Ratings: Evidence From Power Plant Designers and Editors

在控制了个体人口统计学变量和排除组织水平变量的影响下,探讨了电厂设计和编辑两个职位任职者的任务绩效水平对于他们Occupational Inform ation Network(以下缩写为O*NET)工作分析问卷评价结果的影响。层次回归结果发现,控制了相关因素后,发电厂设计人员的任务绩效水平显著影响其对技术性技能的水平评价,编辑的任务绩效水平显著影响信息处理的重要性评价和水平评价,在一定程度上证实了&ldquo;工作分析结果差异来源于真实差异&rdquo;的理论。</p

The Effects of Job Incumbents＇Task Performance on Their Job Analysis Ratings： Evidence From Power Plant Designers and Editors

在控制了个体人口统计学变量和排除组织水平变量的影响下，探讨了电厂设计和编辑两个职位任职者的任务绩效水平对于他们Occupational Information Network（以下缩写为O＊NET）工作分析问卷评价结果的影响。层次回归结果发现，控制了相关因素后，发电厂设计人员的任务绩效水平显著影响其对技术性技能的水平评价，编辑的任务绩效水平显著影响信息处理的重要性评价和水平评价，在一定程度上证实了“工作分析结果差异来源于真实差异”的理论

转Bt基因棉花对新疆棉田主要害虫和天敌种群的影响

2002和2003年通过对新疆库尔勒垦区主栽转Bt基因棉(抗9)和常规棉(20-1-4)的定点、定株调查,分析转基因对棉田主要害虫和天敌的种群数量影响。结果表明,两类棉田主要害虫发生期、发生量存在显著差异性,但发生趋势基本一致。靶标害虫棉铃虫卵期发生量在两类棉田无差异性(P>0.05);在幼虫的发生量上,常规棉田显著大于转Bt基因棉田(P0.05)