Search results for "Analyser"
showing 10 items of 27 documents
Quantification of the microstructural evolution of polycrystalline fabrics using FAME: Application to in situ deformation of ice
2014
Abstract In geology, glaciology and material science new technological advances result in an ever increasing amount of data and datasets, in particular when in situ experiments are conducted. Rapid, rigorous and reliable statistical treatment is needed to allow researchers to access these large datasets for further analysis. Here, we present FAME (Fabric Analyser based Microstructure Evaluation), a suite of Matlab® scripts that utilize the Matlab® open-source toolboxes MTEX and PolyLX (optional) for rapid quantification of thin section data. The data has been collected using an automated Fabric Analyser at a spatial resolution of 5 μm/pixel. From the dataset, grain maps are reconstructed an…
Optical interfaces in GD-OES system for vacuum far ultraviolet detection
2003
A Glow Discharge Optical Emission Spectrometry device has been designed for glove box adaptation in CEA Valduc to analyze carbon, hydrogen, nitrogen and oxygen at low concentration in nuclear materials. Vacuum ultraviolet region of the spectrum (between 120 and 160 nm) was chosen for light elements analysis with the aim to avoid optical interferences with matrix emission lines (20000 lines in the visible region for plutonium element). For this purpose, two different systems of collection have been developed: a first based on two focusing lenses and a second having an optical interface based on mirrors. In the present paper, the whole set-up integrated in a glove box is described. Optical li…
Corporate Governance in Scandinavia
2008
This article addresses the role of formal institutions and informal networks on corporate governance practices. The existing corporate governance literature has mostly examined the formal institutions, such as the effect of legal systems. Our contribution is to consider the effect of informal “small world” characteristics of ownership and board networks. We use the case of Scandinavia (Denmark, Norway and Sweden) to examine these effects. Our empirical results reveal large differences in formal board and ownership structures between the Scandinavian countries, but strong similarities in terms of law enforcement, political stability, government effectiveness, rule of law, control of corrupti…
Reconstruction of 3D grain boundaries from rock thin sections, using an advanced polarised-light microscopy method
2017
Grain boundaries play a significant role in materials by initiating reactions and collecting impurities. Here we present FAGO (Fabric Analyser Grain boundary recOnstruction), a first step towards the automatic determination of three-dimensional (3D) grain boundary geometry using polarised light. The trace of the grain boundaries from 2D rock thin sections are determined primarily from data acquired using an automatic fabric analyser microscope and the FAME software (fabric analyser-based microstructure evaluation; Peternell and colleagues and Hammes and Peternell). Based on the Fabric Analyser G50's unique arrangement of nine differently oriented light sources the retardation can be determi…
Experimental study of the pyrolysis of waste bitumen for oil production
2020
Abstract This work focuses on bitumen slow pyrolysis. Mass and energy yields of oil, solid and gas were obtained from pyrolysis experiments using a semi-batch reactor in a nitrogen atmosphere, under three non-isothermal conditions (maximum temperature: 450 °C, 500 °C and 550 °C). The effect of temperature on the product yields was discussed. The gas compositions were analysed using gas chromatography (GC) and the heating value of oil and solid residue was also measured. Using a thermo-gravimetric analyser, kinetic parameters were evaluated through Ozawa-Flynn-Wall (OFW) method. Results showed that oil yield is maximum at 500 °C (50%). Moreover, gas yield increased with increasing pyrolysis …
Validation of a multi-residue UHPLC-HRMS method for antibiotics screening in milk, fresh cheese, and whey
2022
Abstract The aim of this study was to develop a UHPLC–HRMS methodology as a suitable tool for the screening of antibiotics in milk, fresh cheese, and whey. Compounds were analysed using an Orbitrap Exactive™ analyser working at a resolving power of 50,000 FWHM in full scan, both in positive and negative electrospray ionization mode, and a high mass accuracy (
Determination of Human Granulocyte Elastase by the Immunoactivation Method on the Hitachi® 717 Automated Analyser
1991
This paper describes a fully mechanized homogeneous immunoassay using the immunoactivation method for the rapid and specific determination of human granulocyte elastase (EC 3.4.21.37) in plasma. The method uses anti-elastase antibody fragments from sheep, conjugated to horseradish peroxidase. These enzyme-antibody conjugates bind to the elastase-alpha 1-proteinase inhibitor complex present in plasma. A separate sample blank with non-specific sheep antibody fragments conjugated to horseradish peroxidase corrects for errors introduced by the sample matrix. Measurements were performed with the clinical chemistry analyser Hitachi 717. A single determination can be performed in 10 min, requiring…
Untersuchungen zur Mehrfach-Emission von Sekund�relektronen
1964
CuBe- and NaCl-targets are bombarded by single electrons (100–600 eV). The secondary electrons accelerated by 40 kV strike the crystal of a scintillation counter, backed by a multichannel analyser. The probabilityP n of emission ofn=0, 1, 2, 3, ... secondaries can be found from the pulse height distribution. The probability distributionP n =f(n) shows a characteristic deviation from aPoisson's distribution. There was no evidence that there is a preference for even numbers ofn as found byBarrington andAnderson.
Nachweis der Mehrfachemission von Sekund�relektronen mittels Proportionalz�hlrohr
1965
A proportional counter is used as analyser for electron energies (in the range 10 to 20 keV). The resolving power for 20 keV is 21%. The multiple emission of secondary electrons is investigated with this counter.
Zur Sekund�relektronenemission durch Argonionen und Argonatome im Energiebereich von 1 bis 20 keV
1966
Be-, CuBe-, Cu- and Al-targets are bombarded by single A+ and A0 in the energy range from 1 to 20 keV. The secondary electrons accelerated by 20 keV are counted by a proportional counter backed by a multichannel analyser. The probability distributionPn of emission ofn=0,1, 2, 3, ... secondary electrons can be found from the pulse height distribution. WhenPn is known the yield for A+ and A0 can be calculated. The counting of neutrals in the energy range investigated is discussed.