Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"gas exposure"”.
-
The Effects of Cesium Deposition and Gas Exposure on the Field Emission Properties of Single Wall and Multiwall Carbon Nanotubes
… study was made on the effects of O2, Ar and H2 gases on the field emission properties of SWNT bundles and multiwall carbon nanotubes (MWNTs). We observed that Cs deposition decreases the turn-on field for FE by a factor of 2.1 - 2.9 and increases the FE current by 6 orders of magnitude. After Cs …
-
Direct bromine-80 or bromine-82 labelling of biomolecules via excitation labelling methods: preparation of radiopharmaceuticals
… deoxycytodine, phenylalanine and acetic acid, to gaseous CF₃<sup>82m</sup>Br (or CF₃<sup>80m</sup>Br) was studied. The radiochemical yields of the brominated products are relatively small and range from 1% in the case of bromo-deoxyuridine to 11% for bromoacetic acid. The modification of this …
-
IR Spectroscopy Study of silver and Copper Nano-films
… deposition of the metal films onto MgO(001) and gas exposure to the metal films at low temperatures (< 100 K) in Ultra High Vacuum (UHV), infrared spectra were captured in situ in transmission or reflection geometry. Afterwards the surface morphology of the films was examined ex situ by atomic …
-
Effect of Titanium Nitride Surface Layers on Deuterium Absorption and on Sub-Surface Concentration Profiles in Titanium
… region spans from 100 to 1000 A depending on the gas exposure time, and contains about 33 at. % (Ti2N). The second region contains solid solution of nitrogen in close packed hexagonal (cph) titanium TiN x, with x decreasing from 25 at. % to 1 at. % over a depth of 3000--7000 A. In the third …
-
Investigation of Recrosslinkable Preformed Particle Gels for Natural Gas Conformance Control
… the feasibility of using this product to improve gas flooding conformance for mature reservoirs with conduits or fractures. Two RPPG systems were used for the experiment: a CO<sub>2</sub>- resistant RPPG (CR-RPPG) synthesized using acrylamide (AM) and 2-acrylamide-2- methylpropane sulfonate acid …
-
Acute hypoxia-induced diaphragm dysfunction is prevented by antioxidant pre-treatment
… I.P.) immediately prior to acute hypoxia exposure. Ventilation was assessed using whole-body plethysmography. O2 consumption and CO2 production were measured as indices of metabolism. Diaphragm muscle contractile performance was determined ex-vivo. Gene expression was examined at 1, 4, and …
-
Mass spectrometric methods for analyses of blister and choking agent markers
… markers of nitrogen mustards and chlorine exposure using mass spectrometry. The research included development of sample preparation methods, optimisation of instrumental methods, and data analysis strategies, unique to the analysis of nitrogen mustards and chlorine. In addition, efforts …
-
The emerging role of mesenchymal stromal cells among therapeutic options for chronic obstructive pulmonary disease
… in the development of COPD. Noxious particle or gas exposure to cells in the lungs leads to a chronic and sometimes irreversible state of airway inflammation, resulting in airflow limitation, hyper production of mucous, and destruction of distal lung tissue including gas exchange surfaces. COPD …
-
Anesthetic conserving device : Arbeitsplatzbelastung und praktische Umsetzung
… the goal is to determine the actual degree of gas exposure for personnel in the Intensive Care Unit (ICU) by using the Anesthetic Conserving Device® (AnaConDa®). Therefore, three different test methods were used in the laboratory at the University of Ulm. The different testing methods and …
-
On mitigation of hydrogen embrittlement and theoretical modeling of hydrogen accelerated fatigue crack growth
… that concurrent cyclic loading and hydrogen gas exposure can lead to enhanced fatigue crack growth rates. This work aims to propose a methodology to mitigate failure of steels by hydrogen embrittlement under monotonic loading and develop a mechanistic model for fatigue crack growth in ductile …
-
In situ electron microscopy of nanomaterials dynamics in heterogeneous phase environments
… of temperature, electrochemical biasing, and exposure to liquid and gas. In this thesis, nanomaterials dynamics are investigated using in situ TEM coupled under the control of external stimuli in a heterogeneous phase consisting of solids exposed to a liquid or gas environment. First, I …