National Repository of Grey Literature 208 records found  beginprevious199 - 208  jump to record: Search took 0.01 seconds. 
Theoretical and experimental study of the Wien filter properties for the application in a scanning microscope with very low energy
Vlček, Ivan
The work aims to verify experimentally the Wien filter properties and the validity and exactness of numerical calculations of electric and magnetic fields and electron optical properties for this rotationally non-symmetrical energy-dispersion element.
Photoactive Titanium Oxide - Perspective Pigments for 3rd Millenary
Štengl, Václav ; Bakardjieva, Snejana ; Šubrt, Jan ; Balek, Vladimír ; Jirkovský, Jaromír
Titania powders, widely used in industrial application as pigments, opacifiers, photocatalysts and fillers have been obtained either directly from titanium-bearing minerals or by precipitation from solutions of titanium salts or alkoksides.
Observation of biological material in low voltage transmission electron microscope
Vancová, Marie ; Nebesářová, Jana
Different methods of specimen preparation for low voltage transmission electron microscopy (LVEM) were evaluated. The contrast of the image in LVEM, contrary to high voltage TEM, is strongly influenced by the thickness of the specimen. The resin embedding media used and the process of sectioning employed contributed to image quality and resolution.
Comparison of the cell structure of tissues prepared by different methods for transmission electron microscopy
Vancová, Marie ; Nebesářová, Jana
The aim of this work is to show how methods which are able to retain antigenicity of tissues can influence the structural appearance of the specimen. We compared the ultrastructure of tissues conventionally embedded in hydrophobic epoxides, with tissues embedded in hydrophilic acrylic resins (polymerized by heat or UV light) and cryo-sections.
The first experience with the specimen preparation for low-voltage transmission electron microscope
Nebesářová, Jana ; Vancová, Marie
The low-voltage transmission electron microscope, working in the TEM mode, requires ultrathin sections with a thickness 20-30nm. This demand brings problems with a section cohesion caused by insufficient resin infiltration and with a chatter caused by unequal thickness of the section. The contrast of unstained biological specimens in LV TEM is comparable with the contrast obtained in HV TEM of stained specimens.
Electron microscopical study of embryonic envelopes in the tapeworm Proteocephalus torulosus (Cestoda: Proteocephalidea)
Bruňanská, Magdaléna ; Nebesářová, Jana ; Scholz, Tomáš
The ultrastructure of the embryonic envelopes of the cestode Proteocephalus torulosus (Batsch, 1786), a parasite of cyprinid fish, was examined by transmission electron microscopy.
The importance of fixation procedures for transmission electron microscopy of haemocytes of Pyrrhocoris apterus
Slavíčková, K. ; Berger, Josef ; Nebesářová, Jana ; Němec, Václav
The importance of fixation procedures for transmission electron microscopy of haemocytes of Pyrrhocoris apterus.
Autoemisní katody pro elektronové mikroskopy
Delong, Armin ; Kolařík, V.
Field emission emitters have significantly improved the coherence of electron guns in electron microscopes and allowed to reach atomic-scale resolution in the case of crystal imaging. Even now, thirty years after the first application of field emission emitters, one can hardly say that the development of electron emitters has been finalized

National Repository of Grey Literature : 208 records found   beginprevious199 - 208  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.