首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
蛋白质与卟啉相互作用的研究—肿瘤发光机理的探讨   总被引:1,自引:1,他引:0  
本文研究了原卟啉Ⅸ蛋白,蛋白和原卟啉Ⅸ结合物的荧光,荧光寿命和时间分辨光谱。结果表明癌的发光并非其内原性卟啉的单一发光,而可能是癌细胞组织中的发光物质与其内原性卟啉之间的敏化荧光。  相似文献   

2.
宫颈癌固有荧光及其分子基础探讨研究   总被引:4,自引:0,他引:4  
在光作用下,宫颈癌组织发光特征峰主要在630nm和420nm附近,其发光与蛋白-卟啉结合物的敏化荧光特性基本相类同。  相似文献   

3.
宫颈癌固有荧光及其分子基础探讨研究   总被引:1,自引:0,他引:1  
在光作用下,宫颈癌组织发光特征峰主要在630nm和420nm附近。其发光与蛋白-卟啉结合物的敏化荧光特性基本相类同。  相似文献   

4.
本文研究了蛋白-卟啉的激发能量转移以及肿瘤组织的提取物的发光,观察到蛋白-卟啉的发光与临床诊断所选择的癌固有荧光特征峰的关系,探讨了癌的发光物质。  相似文献   

5.
本文研究了蛋白──卟啉的激发能量转移以及肿瘤组织的提取物的发光,观察到蛋白──卟啉的发光与临床诊断所选择的癌固有荧光特征峰的关系,探讨了癌的发光物质。  相似文献   

6.
蛋白质与原卟啉IX及复合物发光机理探讨   总被引:1,自引:0,他引:1  
对原卟啉IX(protoporphyrin IX)与蛋白质结合物的吸收、荧光的激发、发射光谱等的研究,表明了在光作用下,其可见区发光与卟啉有关,而紫外区发光与蛋白质的色氨酸残基有关,其光谱特性与临床诊断选择的癌固有荧光特征峰基本相符。该研究结果为探讨癌的发光机理积累了有益资料。  相似文献   

7.
蛋白质与原卟啉Ⅸ及复合物发光机理探讨   总被引:1,自引:0,他引:1  
对原卟啉Ⅸ(ProtoporphyrinⅨ)与蛋白质结合物的吸收、荧光的激发、发射光谱等的研究,表明了在光作用下,其可见区发光(λmax635nm左右)与卟啉有关,而紫外区发光(λmax422nm左右)与蛋白质的色氨酸残基有关,其光谱特性与临床诊断选择的癌固有荧光特征峰基本相符。该研究结果为探讨癌的发光机理积累了有益资料.  相似文献   

8.
Yb~(3 )-Ho~(3 )双掺杂ZBLAN玻璃中Ho~(3 )的上转换发光   总被引:5,自引:0,他引:5  
室温下用LD(0.97μm)作为激发源,测出不同双掺浓度(Yb3+-Ho3+)玻璃Yb3+敏化Ho3+离子的可见上转换发光光谱,给出了单掺和双掺玻璃中的Yb3+荧光寿命。双掺玻璃中Yb3+荧光寿命明显降低,Yb3+对Ho3+离子的敏化上转换发光是非常有效的,并讨论了敏化机理。  相似文献   

9.
利用共沉淀法合成了以Sm~(3+)为敏化离子,Dy~(3+),Eu~(3+)为激活离子共掺杂SrWO_4荧光粉,通过扫描电子显微镜、X射线衍射仪、荧光分析仪对荧光粉的形貌、物相结构及发光性能进行了表征及分析。结果表明,在394 nm波长激发下,Sm~(3+)浓度为1.5 mmol/L时SrWO_4荧光粉发光性能最好,样品色坐标为(0.338,0.342),接近标准白光色坐标(0.33,0.33)。因此,通过调控敏化离子Sm~(3+)浓度可以实现SrWO_4荧光粉色坐标的红移,在暖白光LED材料的应用研究上具有一定的意义。  相似文献   

10.
原卟啉和血清蛋白的时间分辨光谱   总被引:3,自引:0,他引:3  
我们首次测得了人体内源性原卟啉原卟啉和血清蛋白及其混合液的荧光衰减寿命和时间分辨光谱。结果显示,BSA和PP的混合使的荧光寿命变短,而PP的荧光寿命则变长,从而进一步肯定了BSA→PP的能量传递过程的存在,并为光敏治癌的机理研究提供了有的依据。  相似文献   

11.
This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.  相似文献   

12.
We have fabricated the white organic light-emitting devices (WOLEDs) based on 4,4' -bis(2,2 -diphenyl vinyl)-1,1' - biphenyl (DPVBi) and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene (rubrene). The device structure is ITO/2T-NATA (20 nm)/NPBX (20 nm)/CBP: x%Ir(ppy)3:0.5% rubrene (8 nm)/NPBX (5 nm)/DPVBi (30 nm)/Alq(30 nm)/LiF(0.5 nm)/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir(ppy)3], acts as a yellow light-emitting layer, and N,N' -bis- (1-naphthyl)- N,N' -diphenyl -1, 1' -biphenyl-4,4' -diamine (NPBX) acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir (PPY)3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.  相似文献   

13.
To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.  相似文献   

14.
本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。  相似文献   

15.
Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.  相似文献   

16.
It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer (LDV).  相似文献   

17.
正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must  相似文献   

18.
正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta-  相似文献   

19.
正Cloud computing is a novel computing paradigm that utilizes remote cloud resources to achieve a high-performance computation.Cloud provides infrastructure,platform and software as different on-demand services.China has made remarkable progress in cloudbased products and operating system technology.The government,enterprises and research institutions are all active in the development of cloud computing-related projects.Despite the progress,many important problems  相似文献   

20.
正Smart Grid Communications The electric power industry is undergoing profound changes as the industry aims to capture the promise of a smart grid for a sustainable energy future.Enabled by the advanced sensing devices such as Phasor Measurement Units(PMUs),increasingly powerful  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号