National Repository of Grey Literature 3 records found  Search took 0.01 seconds. 
Structure investigation of hydrogels using a cryo-SEM
Adámková, Kateřina ; Hrubanová, Kamila ; Samek, Ota ; Trudičová, M. ; Sedláček, P. ; Krzyžánek, Vladislav
Hydrogels can be characterized as elastic hydrophilic polymer chains connected in network\nwhich are able to swell notably when exposed to aqueous media by absorbing considerable\namounts of water. Besides being a constituent of living organisms, nowadays, there are\nvarious fields hydrated polymers (e.g. polyvinyl alcohol, collagen, and starch) can be utilized\n– in both biological and non-biological form. Classic examples of such applications are\nhuman health and cosmetics (contact lenses, wound healing dressings and artificial\nreplacement tissues – skin, arterial grafts, cornea and spinal disc replacement), pharmacy\n(drug delivery systems), bioengineering, food industry, agriculture etc. Also, hydrogels\ncan reversibly change their shape when being exposed to a temperature change.
Preparation of Specimen for Transmission Electron Microscopy using Freeze Substitution and Agitation
GRAHAMMER, Johannes
The quality of biological samples for Transmission Electron Microscopy prepared using High Pressure Freezing and Freeze Substitution with a novel agitation module invented by Helmuth Goldhammer and Siegfried Reipert was compared to Cells prepared without agitation and the Freeze Substitution protocol by Obornik et al. The amount of extraction was quantified via immunolabelling of RuBisCO inside the plastids of the Alveolate Chromera Velia Mechanical Damages were quantified by counting of obviously damaged and intact cells at low magnification
Comparison of TEM sample preparation methods for immunogold labeling
GRECHHAMER, Christian
The tracking of antigens in biological samples can be achieved by labeling them with gold-gonjugated antibodies (immunogold labeling). This thesis gives an overview of several sample preparation methods for TEM and investigates their effects on the binding efficiency of antibodies to certain antigens. For this reason, protein samples were processed according to four different protocols, cut into ultra-thin sections and labeled with primary and secondary antibodies. The micrographs, taken during observation with a TEM, were analysed quantitatively and the obtained data was statistically evaluated.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.