National Repository of Grey Literature 36 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Patterning of excitable cells on multi-electrode arrays
Slavík, Jan ; doc. RNDr. Petr. Skládal, CSc. (referee) ; Průcha,, Jaroslav (referee) ; Hubálek, Jaromír (advisor)
Práce se zabývá zarovnáváním excitabilních buněk na multielektrodových polích. Nejprve bylo analyzováno zarovnávání excitabilních buněk. Byly použity embryonální neurony z hippocampusu potkanů a HL-1 buňky, které jsou odvozeny z AT-1 linie nádorových myších atriálních kardiomyocytů. Zarovnávání bylo testováno na drážkovaných površích a na površích s materiály s různou buněčnou afinitou. Bylo prokázáno, že na drážkových površích se ve směru drážek zarovnávají neurony i HL-1 buňky, ale na površích s různou chemickou affinitou se zarovnávají pouze neurony. Dále byly vyrobeny vlastní multielektrodová pole, na těchto multielektrodových polích byly kultivovány HL-1 buňky a byl změřen a analyzován akčních potenciál HL-1 buněk. Cílem bylo prokázat, že je možné měřit akční potenciál na vyrobených multielektrodových polích. Pro zarovnání buněk na multielektrodovém poli bylo vyrobeno speciální multieletrodové pole s uniformním povrchem. Toto multielektrodové pole je nazýváno planární multielektrodové pole. Planární multielektrodové pole bylo vyrobeno speciálním vyrobním procesem. Vrstvy planárního multielektrodového pole byly deponovány na pomocný substrát v opačném pořadí. Pomocný substrátem pro depozici byla křemíková deska, na který byla nadeponována další pomocná vrstva zlata. Horní izolační vrstva planárního multielektrodové pole byla deponována jako první a nejspodnější vrstva substrátu byla nadeponována jako poslední. Planární multielektrodové pole i s pomocnou zlatou vrstvou bylo strhnuto s křemíku díky nízké adhezi zlata ke křemíku a planární multielektrodové pole se otočilo vzhůru nohama. Pomocná zlatá vrstva byla odstraněna mokrým leptadlem a tím bylo planární multielektrodové pole dokončeno. Na planárním multielektrodovém poli byly zarovnány HL-1 buňky do pruhů chemickou metodou pomocí kombinace otisku adhezní látky a následným potažení neotisklých ploch anti-adhezní látkou. Elektrofyziologické vlastnosti zarovnaných HL-1 buněk byly změřeny pomocí planárního multielektrodového pole. Tímto experimentem byla představena výrobní technologie pro výrobu planárních multielektrodových polí a toto planární multielektrodové pole bylo úspěšně testováno pro zarovnání HL-1 buněk na jeho povrchu kombinací otisku adhezní látky a potahování antiadhezivním činidlem.
Effect of surface on bonded joint
Trhoň, Vojtěch ; Halamík, Tomáš (referee) ; Kubíček, Jaroslav (advisor)
This master’s thesis is divided into two parts. In the first part are these topics: bonding theory, treatment of bonding surface, types of adhesives, adhesives in the transportation industry and construction and stress of bonded joints. In the second part of this thesis is experimental evaluation of the effect of surface of material on strength of bonded joint.
Utilization of microscopic analysis for evaluation of glued wood
Kučera, Vít ; Krbila, Jaromír (referee) ; Vaněrek, Jan (advisor)
This paper addresses the issue of glued wood joints in terms of the types of adhesives. We will determine the depth of the penetration of adhesives into the structure of the wood adherend . For this purpose we use methods of optical microscopy and its special kind and fluorescence microscopy .
Analysis of adhesives in general engineering
Trhoň, Vojtěch ; Kovář, Petr (referee) ; Kubíček, Jaroslav (advisor)
This bachelor thesis is concerned with analysis of adhesives in general engineering and it is focusing on the partition of adhesives according to curring and usability. Positive and negative mechanical stress of glued joints are characterised here. The technologic process of gluding side panels of tram is elaborated in the end of this bachelor thesis.
Study of durability of wood glue bonds against increased temperature
Kučera, Vít ; Vejpustek,, Zdeněk (referee) ; Vaněrek, Jan (advisor)
In this time are for design of wooden elements available simplified procedures for fire modeling which defines ČSN EN 1991-1-2. But it is not experimentally tested the impact of adhesive on the final value of fire resistance of laminated panels. This diploma thesis solves basic normative practices that could explain the durability of glue bond against increased temperatures. in the practical part will be undertaken to experimentally assess the impact of various kinds of adhesive-based (epoxy, formaldehyde, PUR and EPI) on the glued bond durability against increased temperature. Glued joints that will be subjected to gradual temperature exposure in order to assemble the dependence of the temperature influence on the final strength of the joint according to the type of adhesive.
Semiautomatic Dispenser Application in Flexible Low Series PCB Assembly in SMT
Prikryl, Petr ; Zatloukal, Miroslav (referee) ; Starý, Jiří (advisor)
The aim of this thesis is solving the issue of introducing the Dotmaster semi-automatic dispenser into the flexible low series surface mount technology assembly of printed circuit boards. The first part of the thesis deals with the issue of introduction to the dispension of solderpastes, adhesives and packaging materials. The second part is focused on the description of the Dotmaster semi-autamatic. The last part is devoted to actual measuring and observation with the device using PD 860002 SA adhesive made by Heraeus company and SAC solder paste by Kester company. Showing the characteristics of dependecies of the shape of the dispensed adhesive and solder paste on several parameters of dispension follows.
Heat resistance of wood bondlines
Šustáček, Jan ; Melichar, Tomáš (referee) ; Vaněrek, Jan (advisor)
This thesis is focused on studying the impact of elevated temperatures on the resistance of bonded joints. The aim of this study is to assess the impact of exposure to temperatures on selected types of adhesives. In the theoretical part was made research and comparison of selected species agglomerated materials and described the issue of fire safety of buildings. To determine the strength characteristics of bonded joints at different temperatures have been made in the practical part load tests according to valid standards.
Analytical methods determining the quality of joints of wooden adherend
Šmíra, David ; Vejpustek,, Zdeněk (referee) ; Vaněrek, Jan (advisor)
Bachelor's thesis is focused on evaluation of analytical methods, which are used for analyzing of bondline in timber adherend. Primary goal of this thesis is focused on specific methods, it means methods used for evaluation of adhesive flow into timber adherend with help of fluorescence microscopy, method of FTIR Fourier transform infrared spectroscopy and thermal analysis method such as Dynamical - mechanical analyse.
Resistance of waterproofing systems for flat roofs
Kerekanič, Robin ; Žák,, Antonín (referee) ; Žižková, Nikol (advisor)
This bachelor thesis targets on the resistance of waterproofing systems for flat roofs using bitumen sheets. It proposes an alternative methods for testing the adhesion of the waterproofing on warm flat roof. Endpoint is the adhesion of self-adhesive bitumen sheet for thermal insulator made of expanded polystyrene to the effects of static and dynamic stresses. Finally, it assessed the appropriateness of the methods used and the effect of the adhesion of self-adhesive bitumen sheet on the method of execution.
Utilization of accelerated durability test of wood glued joints for consequent service-life prediction
Šmíra, David ; Tupý, Michael (referee) ; Vaněrek, Jan (advisor)
The aim of my diploma thesis are methods which are able to describe durability aspects of glued wooden joints. The main objective are methods which primarily includes hygrothermal stress acting in the glued joint of wooden adherend and determine the service life of the specific glued joint by modelling based on Arrhenius relation and the other methods. Other part of this work is aimed to shear tests of the samples exposed to different thermal and humidity conditions and for individual sets of exposures determining the glue penetration depth into the wooden adherend by EPI fluorescent analysis. These analytic methods are used for quality check of the glued joints, which are mostly based on strength, chemical or structural parameters of the tested sample.

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