Browsing Ústav fyzikálního inženýrství by Title
Now showing items 1-20 of 88
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3D Morphology of Fracture Surfaces Created by Mixed-mode II+III Fatigue Loading in Metallic Materials
(Elsevier, 2014-06-25)This paper presents results of 3Dfractographical analysis of shear-mode fatigue cracks in ARMCO iron, alpha-titanium, nickel and the X5CrNi18-10 steel. Observation of crack paths on a microscopic level enables us to reveal ... -
The adhesion of normal human dermal fibroblasts to the cyclopropylamine plasma polymers studied by holographic microscopy
(Elsevier B.V., 2016-06-15)The understanding of cell–surface interactions plays an important role for the biomaterials development and bioengineering. Although it is already known that amine groups increase the cell adhesion and proliferation, the ... -
Apparatus for dosing liquid water in ultrahigh vacuum
(AIP Publishing, 2018-08-30)The structure of the solid-liquid interface often defines the function and performance of materials in applications. To study this interface at the atomic scale, we extended an ultrahigh vacuum (UHV) surface-science chamber ... -
Automated classification of cell morphology by coherence-controlled holographic microscopy
(SPIE, 2017-08-23)In the last few years, classification of cells by machine learning has become frequently used in biology. However, most of the approaches are based on morphometric (MO) features, which are not quantitative in terms of cell ... -
Automated interpretation of time-lapse quantitative phase image by machine learning to study cellular dynamics during epithelial-mesenchymal transition
(SPIE, 2020-08-31)Significance: Machine learning is increasingly being applied to the classification of microscopic data. In order to detect some complex and dynamic cellular processes, time-resolved live-cell imaging might be necessary. ... -
Calcium and fluorine signals in HS-LEIS for CaF2(111) and powder-Quantification of atomic surface concentrations using LiF(001), Ca, and Cu references
(AIP Publishing, 2020-12-01)The powder of CaF2 has been proposed as a practical reference for the quantitation of Ca and F in low energy ion scattering (LEIS) analysis. It is chemically inert, easy to clean, and inexpensive. LEIS is extremely surface ... -
Catalyst–substrate interaction and growth delay in vapor–liquid–solid nanowire growth
(IOP Publishing, 2018-03-26)Understanding of the initial stage of nanowire growth on a bulk substrate is crucial for the rational design of nanowire building blocks in future electronic and optoelectronic devices. Here, we provide in situ scanning ... -
Characterization of GaAs Solar Cells under Supercontinuum Long-Time Illumination
(MDPI, 2021-01-19)This work is dedicated to the description of the degradation of GaAs solar cells under continuous laser irradiation. Constant and strong exposure of the solar cell was performed over two months. Time-dependent electrical ... -
Chk1 inhibition significantly potentiates activity of nucleoside analogs in TP53-mutated B-lymphoid cells
(Impact Journals, 2016-08-19)Treatment options for TP53-mutated lymphoid tumors are very limited. In experimental models, TP53-mutated lymphomas were sensitive to direct inhibition of checkpoint kinase 1 (Chk1), a pivotal regulator of replication. We ... -
Comparative study of plasmonic antennas fabricated by electron beam and focused ion beam lithography
(Springer Nature, 2018-06-25)We present a comparative study of plasmonic antennas fabricated by electron beam lithography and direct focused ion beam milling. We have investigated optical and structural properties and chemical composition of gold ... -
Comparison of Different Approaches to Surface Functionalization of Biodegradable Polycaprolactone Scaffolds
(MDPI, 2019-12-01)Due to their good mechanical stability compared to gelatin, collagen or polyethylene glycol nanofibers and slow degradation rate, biodegradable poly-epsilon-caprolactone (PCL) nanofibers are promising material as scaffolds ... -
Complex k-uniform tilings by a simple bitopic precursor self-assembled on Ag(001) surface
(Springer Nature, 2020-12-01)The realization of complex long-range ordered structures in a Euclidean plane presents a significant challenge en route to the utilization of their unique physical and chemical properties. Recent progress in on-surface ... -
Contrast enhanced X-ray computed tomography imaging of amyloid plaques in Alzheimer disease rat model on lab based micro CT system
(Springer Nature, 2021-03-16)Amyloid plaques are small (similar to 50 mu m), highly-dense aggregates of amyloid beta (A beta) protein in brain tissue, supposed to play a key role in pathogenesis of Alzheimer's disease (AD). Plaques' in vivo detection, ... -
Convergent and divergent two-dimensional coordination networks formed through substrate-activated or quenched alkynyl ligation
(Royal Society of Chemistry, 2014-08-01)Metal coordination assemblies of the symmetric bi-functional 4,4-di-(1,4-buta-1,3-diynyl)-benzoic acid are investigated by scanning tunnelling microscopy on metal surfaces. The formation of long-range ordered, short-range ... -
Different concepts for creating antibacterial yet biocompatible surfaces: Adding bactericidal element, grafting therapeutic agent through COOH plasma polymer and their combination
(ELSEVIER, 2021-08-01)Antibacterial coatings have become a rapidly developing field of research, strongly stimulated by the increasing urgency of identifying alternatives to the traditional administration of antibiotics. Such coatings can be ... -
Distinctive behaviour of live biopsy-derived carcinoma cells unveiled using coherence-controlled holographic microscopy
(PLOS, 2017-08-28)Head and neck squamous cell carcinoma is one of the most aggressive tumours and is typically diagnosed too late. Late diagnosis requires an urgent decision on an effective therapy. An individualized test of chemosensitivity ... -
Dual Targeting of BRAF and mTOR Signaling in Melanoma Cells with Pyridinyl Imidazole Compounds
(MDPI, 2020-06-01)BRAF inhibitors can delay the progression of metastatic melanoma, but resistance usually emerges, leading to relapse. Drugs simultaneously targeting two or more pathways essential for cancer growth could slow or prevent ... -
DUCT: Double Resin Casting followed by Micro-Computed Tomography for 3D Liver Analysis
(MYJoVE Corporation, 2021-09-28)The liver is the biggest internal organ in humans and mice, and high auto-fluorescence presents a significant challenge for assessing the three-dimensional (3D) architecture of the organ at the whole-organ level. Liver ... -
The Effect of Hydrogen on the Stress-Strain Response in Fe3Al: An ab initio Molecular-Dynamics Study
(MDPI, 2021-07-26)We performed a quantum-mechanical molecular-dynamics (MD) study of Fe3Al with and without hydrogen atoms under conditions of uniaxial deformation up to the point of fracture. Addressing a long-lasting problem of hydrogen-induced ... -
Effects of microstructure and crystallography on crack path and intrinsic resistance to shear-mode fatigue crack growth
(Italian Group of Fracture, 2015-09-16)The paper focuses on the effective resistance and the near-threshold growth mechanisms in the ferritic-pearlitic and the pure pearlitic steel. The influence of microstructure on the shear-mode fatigue crack growth is divided ...