共查询到18条相似文献,搜索用时 406 毫秒
1.
2.
激光扫描共聚焦显微镜系统及其在细胞生物学中的应用 总被引:14,自引:1,他引:13
激光扫描共聚焦显微镜是近十年发展起来的医学图象分析仪器,现已广泛应用于荧光定量测量、共焦图象分析、三维图象重建、活细胞动力学参数监测和胞间通讯研究等方面。其性能为普通光学显微镜质的飞跃,是电子显微镜的一个补充。本文以美国Meridian公司的ACASULTIMA312为例简要介绍了激光扫描共聚焦显微镜系统的结构、功能和生物学应用前景。 相似文献
3.
激光共聚焦显微技术在植物学中的应用 总被引:1,自引:0,他引:1
激光扫描共聚焦显微镜(La-ser Scanning Confocal Microscope,LSCM)是近年来发展起来的一种新型高精度显微镜,它在荧光显微镜成像基础上加装了激光扫描装置,使用可激发的荧光探针对样品进行标记,利用计算机进行图像采集处理,从而可得到样品内部细微结构的荧光图像。目前此种显微技术不仅用于观察经固定的各种细胞和组织结构,而且还可对活细胞的形态、结构,离子实时动态等进行观察和定量荧光测定,以及定量图像分析。另外,该仪器还具备样品断层扫描,三维图像重建的独特功能。因此,共聚焦… 相似文献
4.
激光扫描共聚焦显微镜Confocal Laser Scanning Microscope)是20世纪80年代中期发展起来并得到广泛应用的新技术[1].在传统光学显微镜基础上,激光扫描共聚焦显微镜用激光作为光源,采用共轭聚焦原理和装置,并利用计算机对所观察的对象进行数字图像处理观察、分析和输出.其特点是可以对样品进行断层扫描和成像,进行无损伤观察和分析细胞的三维空间结构.同时,利用免疫荧光标记和离子荧光标记探针,该技术也可对活细胞内的生命活动进行动态观察和分析,是细胞生物学研究的重要手段和工具,极大地丰富了人们对细胞生命现象的认识. 相似文献
5.
激光扫描共聚焦显微镜可用于固定样品和活细胞样品的成像,近年来得到了广泛的应用。本文介绍了激光扫描共聚焦显微镜的基本原理及其在活细胞成像中的应用,并以FV10-ASW Viewer4.2软件为例,从扫描速度、分辨率、降噪、光电倍增调节、多参数协同优化、成像质量评估、图像后期处理等多个角度总结了激光扫描共聚焦活细胞成像系统的方法优化和推荐参数设置。本文的工作可以为活细胞实验提供一定参考。 相似文献
6.
7.
BRAKENHOFF GJ 《生命科学》2009,(2):191-197
激光扫描共聚焦显微镜近年来得到了迅速发展,是近代最先进的细胞生物医学分析仪器之一。通过它可以对观察样品进行无创断层扫描和成像,在生物学和医学研究诊断的各个方面都得到了广泛的应用。本文主要介绍了激光扫描共焦显微镜的基本原理和发展状况,并着重介绍了在共焦荧光显微镜中采用薄荧光层和切片成像特性图来表征成像状态的功能。这种方法一般用于表征共聚焦和多光子显微镜的成像特性,是比较显微镜切片成像条件、成像质量等相关性能的重要依据。 相似文献
8.
9.
激光扫描共聚焦显微镜在医学研究中的应用 总被引:1,自引:0,他引:1
激光扫描共聚焦显微镜(Confocal laser scanning microscope,CLSM)具有高分辨率、高灵敏度、三维重建、动态分析等优点,使图像更为精确清晰和数字化。该仪器现已广泛应用于细胞生物学、生理学、病理学、遗传学和药理学等研究领域中。本文简述了激光扫描共聚焦显微镜的结构、工作原理并归纳了其在医学各领域研究中的应用。 相似文献
10.
11.
Cvetkovic A Straathof AJ Hanlon DN van der Zwaag S Krishna R van der Wielen LA 《Biotechnology and bioengineering》2004,86(4):389-398
The diffusion of a solute, fluorescein into lysozyme protein crystals has been studied by confocal laser scanning microscopy (CLSM). Confocal laser scanning microscopy makes it possible to non-invasively obtain high-resolution three-dimensional (3-D) images of spatial distribution of fluorescein in lysozyme crystals at various time steps. Confocal laser scanning microscopy gives the fluorescence intensity profiles across horizontal planes at several depths of the crystal representing the concentration profiles during diffusion into the crystal. These intensity profiles were fitted with an anisotropic model to determine the diffusivity tensor. Effective diffusion coefficients obtained range from 6.2 x 10(-15) to 120 x 10(-15) m2/s depending on the lysozyme crystal morphology. The diffusion process is found to be anisotropic, and the level of anisotropy depends on the crystal morphology. The packing of the protein molecules in the crystal seems to be the major factor that determines the anisotropy. 相似文献
12.
High-resolution confocal laser scanning microscopy (CLSM) is a powerful tool for in situ observation and analysis of protein crystal growth kinetics. Because the resolution of CLSM is not diffraction-limited by the object, it is possible to visualize, under certain conditions, objects in molecular dimensions. A modified batch technique is applied which allows the growth kinetics of sufficiently small crystallites fixed at the lower side of a cover glass, within a hanging drop, to be studied in reflected light near the total reflection angle. A gap, or cavity, filled with solution is formed between the cover glass and the upper crystal face, which acts to fix small crystallites by hydrodynamic friction forces. The cavity height enables the propagation of molecular steps across the upper crystal face without constraint, so that the propagation velocity and geometrical parameters can be measured by CLSM. The layer growth kinetics of monoclinic crystallites of a long-acting insulin derivative (Insulin Glargine) is investigated. For a twofold supersaturation of the solution, the growth is governed by 2D nucleation at the edges of the crystallites followed by a spreading of molecular steps. The layer growth kinetics are well fitted by the simple cubic kinetic lattice model. We find that only about one of a thousand solute (protein) molecules which push a kink place due to their Brownian motion becomes really incorporated into the growing crystal. 相似文献
13.
Decapod crustaceans show a great diversity of developmental modes at all levels. In particular, early cleavage varies from total via mixed to superficial modes and from determinate cleavage with a stereotyped pattern to indeterminate cleavage. However, the ground pattern of early decapod development is not clear. To address this problem, we studied the early embryonic development of the caridean shrimp Caridina multidentata with a combination of confocal laser scanning microscopy, scanning electron microscopy, 4D microscopy and 3-D reconstruction software. Despite a yolk-rich egg, the cleavage is holoblastic and shows a distinct pattern of blastomere arrangement, characterized by two interlocking cell bands. This resembles the conditions in dendrobranchiate shrimps, which most likely are the sister group to Pleocyemata to which C. multidentata belongs. Hence, our results offer the possibility to assume total cleavage with blastomeres arranged in two interlocking cell bands as ancestral cleavage mode for Decapoda. 相似文献
14.
E. A. van Spronsen V. Sarafis G. J. Brakenhoff H. T. M. van der Voort N. Nanninga 《Protoplasma》1989,148(1):8-14
Summary The newly developed confocal scanning laser microscope, together with image processing by computer, has been used to obtain three-dimensional information on the organization of grana in chloroplasts in living plant tissue. Chloroplasts are ideally suited for such studies because their pigments show bright autofluorescence. The high-resolution stereo images bridge a gap between classic light microscopy and electron microscopy. Our preliminary observations on several plant species resemble most the early observations of Strugger (1951: Die Strukturordnung im Chloroplasten. Ber Deutsch Bot Ges 64: 69–83) and suggest that the 3-D technique might well be suitable to solve discrepancies in the interpretation of classical light microscopic and electron microscopic observations.Abbreviations 3-D
three dimensional
- CSLM
confocal scanning laser microscopy
- DCMU
3-(3,4-dichlorophenyl)-1,1-dimethyl urea
- DNA
deoxyribonucleic acid 相似文献
15.
Michel Laurent Georges Johannin Herv Le Guyader Anne Fleury 《Biology of the cell / under the auspices of the European Cell Biology Organization》1992,76(1):113-124
Summary— Confocal scanning optical microscopy has significant advantages over conventional fluorescence microscopy: it rejects the out-of-locus light and provides a greater resolution than the wide-field microscope. In laser scanning optical microscopy, the specimen is scanned by a diffraction-limited spot of laser light and the fluorescence emission (or the reflected light) is focused onto a photodetector. The imaged point is then digitized, stored into the memory of a computer and displayed at the appropriate spatial position on a graphic device as a part of a two-dimensional image. Thus, confocal scanning optical microscopy allows accurate non-invasive optical sectioning and further three-dimensional reconstruction of biological specimens. Here we review the recent technological aspects of the principles and uses of the confocal microscope, and we introduce the different methods of three-dimensional imaging. 相似文献
16.
Remodelling of cardiomyocyte cytoarchitecture visualized by three-dimensional (3D) confocal microscopy 总被引:5,自引:0,他引:5
J. Marius Messerli Monika E. Eppenberger-Eberhardt Barbara M. Rutishauser Patrick Schwarb P. von Arx S. Koch-Schneidemann Hans M. Eppenberger Jean-Claude Perriard 《Histochemistry and cell biology》1993,100(3):193-202
The break-down and reassembly of myofibrils in long-term cultures of adult rat cardiomyocytes was investigated by a novel combination of confocal laser scanning microscopy and three-dimensional image reconstruction, referred to as FTCS, to visualize the morphological changes these cells undergo in culture. FTCS is discussed as an alternative imaging mode to low-magnification scanning electron microscopy. The three-dimensional shape of the cells are correlated with the assembly state of myofibrils in different stages. Based on immunofluorescence and confocal laser scanning microscopy it was shown that myofibrils are degraded within a few days after plating and that newly assembled myofibrils are predominantly confined to the continuous area in the perinuclear region close to the membrane in contact with the substratum. The localization of myofibrils along the cell's vertical axis has been investigated both by optical sectioning using confocal light microscopy and by physical sectioning following by transmission electron microscopy. Based on the distribution of myofibrillar proteins we propose a model of myofibrillar growth locating the putative assembly sites to a region concentric around the nuclei. We provide evidence that the cell shape is dominated by the myofibrillar apparatus. 相似文献
17.
18.
利用共聚焦显微镜系统进行视觉显微结构的三维重建 总被引:1,自引:1,他引:0
本文介绍利用共聚焦激光扫描显微镜系统进行的三种动物视觉显微结构的三维重建.所重建的对象为鸽视顶盖的神经元,蜻蜒小眼的晶锥和蟾蜍两个视顶盖之间的纤维联接结构.通过对约60μm厚的样品的共聚焦激光扫描,得到了1和3μm厚的连续光学切面的图象.利用计算机对这些图象进行三维重建得到的模型富有实体感和体视感,特别是以荧光染料标记的样品其三维重建结果比预料的好.三维重建的结果首次展示了这三种视觉显微结构的三维形态,这对进一步研究视觉显微结构的定量形态学和结构功能关系有重要意义,特别是这种装置能研究活组织的三维构型.对该系统的原理和优良性能也作了介绍. 相似文献