01066naa a2200253 a 450000100080000000500110000800800410001910000180006024500640007826000090014230000140015150000580016552002130022365000110043665300210044770000170046870000230048570000200050870000150052870000190054370000150056270000180057777302170059520032862023-05-11       2014    bl uuuu     u00u1 u    #d1 aLASSER, K. R.  aPermeation tubesbthe source of SF6.h[electronic resource]  c2014  ap. 27-48.  aDisponivel em : http://www.globalresearchalliance.org  aThis chapter looks at the designs of permeation tubes used by various research groups, the determination of SF6 release rate from individual tubes (?tube calibration?), and investigations of tube performance.  aMetano  aTube calibration1 aMOATE, P. J.1 aWILLIAMS, S. R. O.1 aDEIGHTON, M. H.1 aMERTIN, C.1 aHEGARTY, R. S.1 aBERNDT, A.1 aIWAASA, A. D.  tIn: LAMBERT, M. G. Guidelines for use of surphur hexafluoride (SF6) tracer technique to measure enteric methane emissions from ruminants. Wellington: New Zealand Agricultural Greenhouse Gas Research Center, 2014.