Compact Detection System for High Sensitivity Hydrogen Profiling of Materials by Nuclear Reaction Analysis

2009 ◽  
Author(s):  
Daniel Keith Marble ◽  
Ben Urban ◽  
Jose Pacheco ◽  
Floyd D. McDaniel ◽  
Barney L. Doyle
Keyword(s):  
Nuclear Reaction ◽  
Detection System ◽  
High Sensitivity ◽  
Nuclear Reaction Analysis

Hydrogen release from irradiated elastomers measured by Nuclear Reaction Analysis

2016 ◽  
Vol 371 ◽  
pp. 216-219 ◽  
Author(s):  
J. Jagielski ◽  
U. Ostaszewska ◽  
D.M. Bielinski ◽  
D. Grambole ◽  
M. Romaniec ◽  
...  
Keyword(s):  
Nuclear Reaction ◽  
Hydrogen Release ◽  
Nuclear Reaction Analysis

scholarly journals In-Situ Ion Beam Measurements of Deuterium Loading in Thin Foil Electrochemical Cells

1989 ◽  
Vol 157 ◽  
Author(s):  
J.A. Knapp ◽  
T.R. Guilinger ◽  
M.J. Kelly ◽  
D. Walsh ◽  
B.L. Doyle
Keyword(s):  
Nuclear Reaction ◽  
Ion Beam ◽  
Cold Fusion ◽  
Thin Foil ◽  
Nuclear Reaction Analysis ◽  
Deuterium Content ◽  
Electrochemical Cells ◽  
External Beam

ABSTRACTA key element of recent assertions of "cold fusion" has been the claim that electrochemical loading of deuterium into Pd electrodes can produce D:Pd levels exceeding 1:1. Using external beam nuclear reaction analysis of Pd foil electrodes in operating electrochemical cells, we have directly monitored deuterium content in-situ. No conditions were found which resulted in loadings higher than ∼0.9.

Determination of stable isotope ratios using nuclear reaction analysis coupled with a particle–gamma coincidence method

2021 ◽  
Author(s):  
Paula Rangel Pestana Allegro ◽  
Márcia de Almeida Rizzutto ◽  
Nemitala Added ◽  
Vitor Ângelo Paulino de Aguiar ◽  
Dennis Lozano Toufen ◽  
...  
Keyword(s):  
Nuclear Reaction ◽  
Gamma Rays ◽  
Charged Particles ◽  
Isotope Ratios ◽  
Nuclear Reaction Analysis ◽  
Stable Isotope Ratios ◽  
Coincidence Method ◽  
Medium Energy ◽  
Gamma Coincidence

This study presents an alternative method to determine isotope ratios using a medium energy accelerator and simultaneously measuring the charged particles and gamma-rays produced in a nuclear reaction.

Abstract 4336: Interrogating the Human Myocardial Interstitium during Myocardial Arrest and Reperfusion: Dynamic Changes in Cytokines and Protease Activity

Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Robert E Stroud ◽  
Christine N Koval ◽  
Isabelle Gengler ◽  
Anne M Deschamps ◽  
John S Ikonomidis ◽  
...  
Keyword(s):  
Detection System ◽  
Ischemia Reperfusion ◽  
Dynamic Assessment ◽  
High Sensitivity ◽  
Fluorescent Detection ◽  
Suspension Array ◽  
Cytokine Analysis ◽  
And Function ◽  
Inflammatory Molecules ◽  
Pulmonary Bypass

Background. Cytokines, such as the interleukins (IL1β, IL2, IL6) and tumor necrosis factor (TNF) can modulate myocardial structure and function with ischemia/reperfusion (I/R) but dynamic assessment of these biological molecules within the human myocardial interstitium with I/R has not been performed, and the inter-relationship to matrix metalloproteinases activity (MMPact) remains unexplored. Accordingly, a fluorogenic microdialysis method was used to simultaneously measure myocardial interstitial cytokine levels and MMPact in patients during and following I/R. Methods . MMPact was measured in patients (n=13) undergoing cardio-pulmonary bypass (CPB) at baseline, during myocardial arrest and CPB (on-CPB), and immediately following reperfusion and separation from CPB (post-CPB) by a validated in-line microdialysis fluorescent detection system. Myocardial interstitial fluid was subjected to cytokine analysis by high sensitivity multiplex suspension array. Results . Interstitial MMPact increased by over 30% post-CPB and was accompanied by a specific change in cytokine profiles (Figure ). The classical pro-inflammatory molecules such as TNF and IL6 were either not detectable or unchanged, whereas IL1β and IL2 which can be proinflammatory, were increased. Conclusions. These unique results demonstrated that a dynamic cytokine signature occurs within the human myocardial interstitium following I/R and is temporally related to heightened MMP activity. Direct interrogation of the human myocardial interstitium may provide a unique insight into critical signaling pathways which may evoke adverse structural and functional events following I/R.

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