Helium and carbon isotopes in the dissolved gases of Friuli Region (NE Italy): Geochemical evidence of CO2 production and degassing over a seismically active area

2009 ◽  
Vol 266 (1-2) ◽  
pp. 76-85 ◽  
Author(s):  
Francesco Italiano ◽  
Pietro Bonfanti ◽  
Manuela Ditta ◽  
Riccardo Petrini ◽  
Francesca Slejko
2012 ◽  
Vol 114 (1-3) ◽  
pp. 327-340 ◽  
Author(s):  
J. Elizabeth Corbett ◽  
Malak M. Tfaily ◽  
David J. Burdige ◽  
William T. Cooper ◽  
Paul H. Glaser ◽  
...  

1997 ◽  
Vol 36 (04/05) ◽  
pp. 368-371
Author(s):  
R. Soma ◽  
Y. Yamamoto

Abstract.A new method was developed for continuous isotopic estimation of human whole body CO2 rate of appearance (Ra) during non-steady state exercise. The technique consisted of a breath-by-breath measurement of 13CO2 enrichment (E) and a real-time fuzzy logic feedback system which controlled NaH13CO3 infusion rate to achieve an isotopic steady state. Ra was estimated from the isotope infusion rate and body 13CO2 enrichment which was equal to E at the isotopic steady state. During a non-steady state incremental cycle exercise (5 w/min or 10 w/min), NaH13CO3 infusion rate was successfully increased by the action of feedback controller so as to keep E constant.


2015 ◽  
Vol 35 ◽  
pp. 232-235 ◽  
Author(s):  
Leonardo Piccinini ◽  
Paolo Fabbri ◽  
Marco Pola ◽  
Enrico Marcolongo ◽  
Alessia Rosignoli

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