Energy analysis and determination of controlling mechanisms of dissociation for hydrate reservoirs via tracking of dissociation front

2021 ◽  
Vol 14 (7) ◽  
Author(s):  
Shadman Hasan Khan ◽  
Gaurav Dixit ◽  
Chandrajit Balo Majumder ◽  
Amit Arora
Keyword(s):  
Energy Analysis ◽  
Hydrate Reservoirs

Design Charts for Symmetrical Ring Girders

1957 ◽  
Vol 24 (1) ◽  
pp. 144-147
Author(s):  
G. P. Fisher
Keyword(s):  
Energy Analysis ◽  
Bending Moment ◽  
Bending Moments ◽  
Bending Energy ◽  
Normal Loading ◽  
Critical Design ◽  
Design Charts ◽  
Ring Location

Abstract Charts, based on classical bending-energy analysis, are presented for the determination of critical design moments in symmetrical ring girders varying in shape from circular through round to sharp-cornered rings. The girders are subjected to uniform normal loading in the plane of the ring. Location and magnitude of all critical bending moments are given, from which the maximum bending moment is easily selected.

Gas Chromatographic-Thermal Energy Analysis Method for Determination of Volatile N-Nitrosamines in Baby Bottle Rubber Nipples: Collaborative Study

1987 ◽  
Vol 70 (1) ◽  
pp. 64-68 ◽  
Author(s):  
J Ian Gray ◽  
Michael A Stachiw
Keyword(s):  
Thermal Energy ◽  
Energy Analysis ◽  
Collaborative Study ◽  
Internal Standard ◽  
Analytical Techniques ◽  
The United States ◽  
Baby Bottle ◽  
Relative Standard ◽  
Better Than

Abstract A collaborative study was conducted on the U.S. Food and Drug Administration (FDA) dichloromethane extraction method for determining volatile N-nitrosamines in baby bottle rubber nipples. Following dichloromethane extraction, A'-nitrosamines were determined by gas chromatography-thermal energy analysis. Six pairs of blind duplicate rubber nipple samples representing 6 lots were analyzed by 11 collaborating laboratories. All samples were portions taken from equilibrated composites of cut-up rubber nipples obtained from manufacturers in the United States. Recoveries of the internal standard (N-nitrosodipropylamine) at approximately 20 ppb ranged from 10 to 120%. Reproducibility relative standard deviations (RSDJ were between 35 and 45% for N-nitrosamine levels from 10 to 20 ppb. However, when data from laboratories with recoveries less than 75% were excluded (this is now specified in the method), RSD„ values were between 11 and 32% for N-nitrosamine levels from 6 to 26 ppb. Values were consistent with or better than those reported for other analytical techniques designed to quantitate trace contaminants at the low ppb level, e.g., afiatoxin in foods. The method has been adopted official first action for the quantitation of volatile N-nitrosamines in baby bottle rubber nipples.

Determination of Extractable, Apparent Total N-Nitroso Compounds in Cured-Meat Products

1995 ◽  
Vol 78 (6) ◽  
pp. 1435-1439
Author(s):  
Walter Fiddler ◽  
John W Pensabene ◽  
Robert C Doerr ◽  
Robert A Gates
Keyword(s):  
Energy Analysis ◽  
Meat Products ◽  
Nitroso Compounds ◽  
Chemiluminescence Detection ◽  
Minimum Level ◽  
Reliable Measurement ◽  
Total N ◽  
Three Samples ◽  
Cured Meat

Abstract The modification of a newly developed method for determination of apparent total N-nitroso compounds by chemical denitrosation and chemiluminescence detection of nitric oxide (thermal energy analysis) is described. The minimum level of reliable measurement was 0.1 ppm, and the repeatability of the method was 0.2 ppm, based on the response of N-nitrosoproline (NPro). Seventy-three samples of cured-meat products, including frankfurters, bacon, and ham, were examined; 50 samples contained less than 1 ppm. The largest amounts, up to 24.8 ppm, were detected in canned corned beef. This method has several advantages over other methods.

On a structural–acoustic panel cavity modelling in the mid-high frequency domain

2011 ◽  
Vol 226 (4) ◽  
pp. 900-912 ◽  
Author(s):  
M de Rochambeau ◽  
M Ichchou ◽  
B Troclet
Keyword(s):  
Finite Element ◽  
Frequency Domain ◽  
High Frequency ◽  
Energy Analysis ◽  
Coupled System ◽  
Element Model ◽  
Statistical Energy Analysis ◽  
Hybrid Strategy ◽  
Interaction Modelling

This article presents a fluid–structure interaction modelling, based on a coupling between component mode synthesis or finite element and statistical energy analysis (SEA). The hybrid strategy is applied on a panel–cavity coupled system using a modal analysis with uncoupled modes of the subsystems and through a finite element model of the coupled system. The determination of the energy transfer parameters is then considered. The hybrid SEA model is then validated in the high-frequency domain by comparison with an SEA model. Finally, a parametric survey is offered through the established modelling and conclusions on its validity domain are drawn.

Determination of dimethylnitrosamine in air, water, and soil by thermal energy analysis: measurements in Baltimore, Md.

1977 ◽  
Vol 11 (6) ◽  
pp. 581-584 ◽  
Author(s):  
David H. Fine ◽  
David P. Rounbehler ◽  
Anna Rounbehler ◽  
Arlene Silvergleid ◽  
Eugene Sawicki ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Analysis
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