Subradiant,Superradiant Plasmon Modes and Fano Resonance in a Multilayer Nanocylinder Array Standing on a Thin Metal Film

The optical properties of a novel nanostructure consisting of a hexagonal array of aligned vertically three-layered metal-dielectric-metal nanodisks on a silver film are theoretically studied through the finite-difference time-domain method. The novel nanostructure exhibits three obvious optical transmission bands due to the excitation of subradiant plasmon modes, superradiant plasmon modes, and Fano resonances. Surface plasmon polaritons of the underlying Ag film also play a significant role on these three optical transmission bands via coupling with localized surface plasmons of nanodisk pairs. Moreover, the nanostructure also exhibits a good tunability of optical response by modifying the sizes of cylinders, the thickness of underlying metal film, and the dielectric constant of middle layer. These results demonstrate the nanostructure with great advantages in optical sensors and filters.

     

60例活动性肝硬变患者血清载脂蛋白AI与B的临床研究

目的：为了探讨活动性肝硬变患者的血清载脂蛋白AI（APOAI）、载脂蛋白B（APOB）与肝细胞损害的严重程度及其预后的关系。方法：采和速度比浊法检测60例活动性肝硬变患者的血清APOAI、APOB水平,并与其他肝脏生化试验进行比较。结果：活动肝硬变代偿性与失代偿性两组APOAI,APOB均有着显著性差异（P＜0．01,P＜0．05）。活动性肝硬变患者的APOAI与总胆红素（TB）、凝血酶原时间（PT）呈负相关性（P＜0．01,P＜0．01,与白蛋白（ALB）,胆碱酯酶（CHE）、纤维蛋白原（FIB）呈显著正相关性（P＜0．01,P＜0．01,P＜0．05）。APOX仅与FIB呈显著相关性（P＜0．05）,好转组与死亡组两组APOAI有显著性差异（P＜0．05）,APOB无显著性差异,结论：检测活动性肝硬变患者血清APOAI,APOB水平有助于判断肝硬变的严重程度,且APOAI比APOB更敏感、可靠。     

Narrowband Light Total Antireflection and Absorption in Metal Film–Array Structures by Plasmonic Near-Field Coupling

We study the cooperative effects between plasmon gap modes and optical cavity modes of a novel triple-layer structure consisting of double continuous gold films separated by a gold nanosphere array. Narrowband near-perfect antireflection of optical field is achieved for the first time due to the strong near-field light–matter interaction within the deep sub-wavelength gaps between adjacent nanospheres combined with the spatial field confinement effects of the optical cavity built by the double gold films. The coexistence cooperation of near-field dipole plasmon resonances and spatial optical field confinement presents more efficient light modification than that of the individual subsystem and may open a new approach to manage light flow. By varying the period of nanosphere array, the diameter of nanospheres, and the distance between the array and the film, optical behaviors of the proposed structure can be tuned in a wide range. High environmental sensitivity and large figure of merit factor are obtained using this structure as the detecting substrate. Furthermore, ultra-compact structure and high conduction suggest the proposed structure being a good candidate for potential applications in highly integrated optoelectronic devices, such as plasmonic filters and sensors.     

海水盐度、温度对文蛤稚贝生长及存活的影响

在实验室条件下,研究了不同盐度（19个梯度）、温度（17个梯度）对文蛤稚贝生长和存活的影响.结果表明：文蛤稚贝的适宜生存盐度在6.5～39.5,最适生存盐度在9.0～31.0,适宜生长盐度在7.3～38.7,最适生长盐度在15.0～23.0;其适宜生存温度在4.0 ℃～36.1 ℃,适宜生长温度在7.0 ℃～35.4 ℃,较适宜生长温度在17 ℃～33.5 ℃,最适生长温度在24 ℃～27 ℃.文蛤稚贝对高温度、低盐度有较强的适应性.     

重组人胰岛新生相关蛋白的高水平表达与纯化

通过RT-PCR体外扩增目的基因胰岛新生相关蛋白(islet neogenesis associated protein,INGAP),并将其克隆入原核表达载体pET22b(+),在大肠杆菌BL21(DE3)中诱导表达.表达的目标蛋白主要以包涵体形式存在,洗涤杂蛋白后用尿素溶解,经Heparin Agrose亲合柱层析分离后,再用Superdex75凝胶过滤层析进一步纯化.纯化后的INGAP皮下注射免疫家兔,制备兔抗INGAP血清,采用免疫双扩、ELISA评价INGAP的免疫活性.结果显示INGAP表达量高达菌体总蛋白的40%左右,经HPLC测定,分离纯化后的目标蛋白纯度达到98.81%,且具有良好的免疫原性.     

喀斯特地区土壤剖面CO_2、CH_4 和N_2O浓度的相关关系

2006年6月—2007年5月对喀斯特地区土壤剖面中CO2、CH4和N2O进行采样测定,分析了三者间时空分布的相关关系。结果表明,土壤剖面中CO2和N2O含量分别为0.35～35.3ml.L-1和0.31～5.31μl.L-1,夏秋季节高于冬春季节;CH4浓度为0.1～4.7μl.L-1,季节差异不大。随着土壤深度的增加,CO2和N2O的浓度先增加而后明显减小或趋于稳定,CH4浓度则与CO2和N2O相反。相关分析表明,土壤剖面CO2与N2O浓度的时空分布呈显著正相关,与CH4则呈显著负相关。N2O和CH4的时空变化规律为互逆关系,但只在花溪荒草地、清镇阔叶林以及森林公园的马尾松林和阔叶林观测点达到显著水平。     

不同类型的急性冠脉综合征患者血清热休克蛋白60浓度比较研究

目的:了解急性冠脉综合征(ACS)发作时热休克蛋白60(HSP60)及其抗体的血清浓度变化情况。方法:测定各类不稳定性心绞痛(UA,n=32)、S-T段抬高性心肌梗死(STEMI,n=16)和非ST段抬高性心肌梗死(NSTEMI,n=8)和健康对照(n=38)血清HSP60及其抗体的浓度并作统计学比较。结果:各型ACS患者血清HSP60和抗体水平均显著高于对照组(P<0.05),且STEMI患者血清HSP和抗体水平显著高于UA和NSTEMI患者(P<0.05)。结论:测定患者血清HSP60水平可以用于协助ACS诊断和疾病进程监测。     

肠淋巴再灌注加重肠系膜上动脉闭塞性休克大鼠肺部炎症反应

目的:研究肠系膜淋巴再灌注对肠系膜上动脉闭塞性(SMAO)休克大鼠肺部炎症反应的影响。方法:24只Wistar雄性大鼠均分为4组:SMAO组,MLR组,SMAO+MLR组,SHAM组。再灌注2h后,迅速留取肺组织,一部分制备组织匀浆,检测细胞间粘附分子(ICAM-1)和晚期糖基化产物受体(RAGE)。再另外选取固定位置肺部组织放入中性甲醛中固定,用于测定肺内HMGB1、RAGE的表达。结果:SMAO与SMAO+MLR组肺部组织匀浆ICAM-1、RAGE含量显著高于MLR与SHAM组,且SMAO+MLR组肺组织匀浆的ICAM-1、RAGE含量高于SMAO组。肺部组织内HMGB1和RAGE在MLR组与SHAM组基本不表达,或少量表达,MLR加重了SMAO休克模型中HMGB1和RAGE的表达。结论:MLR加重SMAO休克大鼠肺部炎症反应,进一步证实肠淋巴途径在SMAO休克发病学中具有重要作用,同时证实HMGB1及RAGE在SMAO休克大鼠的炎症失常反应中起重要作用。     

CD105 shRNA对激光诱导的脉络膜新生血管的干预作用及其机制

目的:观察CD105shRNA对激光诱导的大鼠脉络膜新生血管的抑制作用,并初步探讨其作用机制。方法:40只BN大鼠单眼采用半导体激光建立CNV模型。随机取20只大鼠于建模后1天使用Pgenesil-eng2转染大鼠视网膜和脉络膜作为实验组。在建模后第14天行FFA检查,观察实验组与对照组视网膜激光斑的渗漏情况。各取5只实验组和5只对照组大鼠,行脉络膜铺片,检测并比较脉络膜新生血管渗漏面积。另32只BN大鼠任取一眼建立CNV模型,其中任取20只大鼠于建模后次日进行Pgen-esil-eng2转染,作为实验组。12只建模眼作为对照组,未建模眼作为空白对照组。于基因转染后1w,2w,3w和4w各取5只实验组大鼠和3只对照组大鼠眼球,获取每个时间点实验组、对照组和空白对照组的脉络膜组织。检测各组每个时间点CD105和VEGF在mRNA水平的表达。结果:FFA显示光凝后第14天时,对照组的渗漏率为63.2%,实验组为24.6%。实验组的BN大鼠眼底渗漏点数较对照组少,渗漏强度较弱。两组间比较有显著性差异。脉络膜铺片结果显示:2周时对照组大鼠的CNV面积为(31.22±1.46)×103μm2,实验组大鼠的CNV渗漏面积为(14.46±0.82)×103μm2,两组间比较有显著性差异。RT-PCR结果显示:实验组VEGF mRNA及CD105 mRNA的表达变化规律与对照组相似,但各个时间点的表达量较对照组均明显下降,其中实验组VEGFmRNA于2w时的表达约为对照组的36.7%;实验组CD105 mRNA在第2w时约为对照组的21.68%。结论:通过沉默CD105基因的表达可以抑制大鼠CNV的生成,下调VEGF的表达可能是其作用机制之一。CD105基因有望成为CNV的基础研究热点和临床治疗的新靶点。