scholarly journals Advanced In-situ Diagnostics for Multicomponent Gas Analysis and Material Aging Part 2: Compact Determination of Hydrogen Isotopes.

2016 ◽  
Author(s):  
David Robinson
Keyword(s):  
Hydrogen Isotopes ◽  
Gas Analysis ◽  
Multicomponent Gas ◽  
In Situ Diagnostics

In Situ Determination of Parameters of Hydrogen Isotopes Interaction with Materials Using Dynamic Sorption Method

2020 ◽  
Vol 76 (3) ◽  
pp. 333-340 ◽  
Author(s):  
T. V. Kulsartov ◽  
Zh. A. Zaurbekova ◽  
I. E. Kenzhina ◽  
M. T. Gabdullin ◽  
Yu. V. Ponkratov ◽  
...  
Keyword(s):  
Hydrogen Isotopes ◽  
Dynamic Sorption ◽  
Sorption Method ◽  
Determination Of Parameters

Fiber laser intracavity absorption spectroscopy for in situ multicomponent gas analysis in the atmosphere and combustion environments

2010 ◽  
Vol 102 (2) ◽  
pp. 331-344 ◽  
Author(s):  
B. Löhden ◽  
S. Kuznetsova ◽  
K. Sengstock ◽  
V. M. Baev ◽  
A. Goldman ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Absorption Spectroscopy ◽  
Gas Analysis ◽  
Multicomponent Gas

Simultaneous in Situ Determination of Dissolved Gases by Gas Chromatography: II. Oxygen and Nitrogen in Activated Sludge Process Streams

1982 ◽  
Vol 14 (4-5) ◽  
pp. 73-85
Author(s):  
T Bilstad ◽  
E N Lightfoot
Keyword(s):  
Activated Sludge ◽  
Waste Treatment ◽  
Gas Analysis ◽  
Activated Sludge Process ◽  
Dissolved Gas ◽  
Permeable Membrane ◽  
Dissolved Nitrogen ◽  
Sludge Waste

A simple, reliable and accurate means for dissolved gas analysis, hitherto used only in clean water, is shown to be suitable for all process streams encountered in activated sludge waste treatment plants. This technique consists of exposing samples of helium across a gas permeable membrane to the solution of interest and determining the amount of each species transferred by standard gas Chromatographic procedures. The technique appears to be the best available for the analysis of dissolved nitrogen and at least competitive to existing techniques for the measurement of dissolved oxygen. It should be possible to extend its use to any dissolved gas exerting a finite partial pressure.

INDIREKTE PAPIERCHROMATOGRAPHISCHE METHODE ZUR BESTIMMUNG DER HARNOESTROGENE

1961 ◽  
Vol 38 (4) ◽  
pp. 545-562 ◽  
Author(s):  
L. Kecskés ◽  
F. Mutschler ◽  
I. Glós ◽  
E. Thán ◽  
I. Farkas ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Granulosa Cell ◽  
Iron Content ◽  
List Type ◽  
Granulosa Cell Tumour ◽  
Hydrolysis Of ◽  
Phenol Fraction ◽  
Qualitative Determination

ABSTRACT 1. An indirect paperchromatographic method is described for separating urinary oestrogens; this consists of the following steps: acidic hydrolysis, extraction with ether, dissociation of phenol-fractions with partition between the solvents. Previous purification of phenol fraction with the aid of paperchromatography. The elution of oestrogen containing fractions is followed by acetylation. Oestrogen acetate is isolated by re-chromatography. The chromatogram was developed after hydrolysis of the oestrogens 'in situ' on the paper. The quantity of oestrogens was determined indirectly, by means of an iron-reaction, after the elution of the iron content of the oestrogen spot, which was developed by the Jellinek-reaction. 2. The method described above is satisfactory for determining urinary oestrogen, 17β-oestradiol and oestriol, but could include 16-epioestriol and other oestrogenic metabolites. 3. The sensitivity of the method is 1.3–1.6 μg/24 hours. 4. The quantitative and qualitative determination of urinary oestrogens with the above mentioned method was performed in 50 pregnant and 9 non pregnant women, and also in 2 patients with granulosa cell tumour.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

Concepts for In Situ Diagnostics in Analog Microelectronic Circuits

2007 ◽  
Author(s):  
Ted Kolasa ◽  
Alfredo Mendoza
Keyword(s):  
Analog Circuits ◽  
System Architecture ◽  
Analog Circuit ◽  
Fault Localization ◽  
Diagnostic System ◽  
Diagnostic Capability ◽  
Common Signal ◽  
Diagnostic Capabilities ◽  
In Situ Diagnostics

Abstract Comprehensive in situ (designed-in) diagnostic capabilities have been incorporated into digital microelectronic systems for years, yet similar capabilities are not commonly incorporated into the design of analog microelectronics. And as feature sizes shrink and back end interconnect metallization becomes more complex, the need for effective diagnostics for analog circuits becomes ever more critical. This paper presents concepts for incorporating in situ diagnostic capability into analog circuit designs. Aspects of analog diagnostic system architecture are discussed as well as nodal measurement scenarios for common signal types. As microelectronic feature sizes continue to shrink, diagnostic capabilities such as those presented here will become essential to the process of fault localization in analog circuits.

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