01019naa a2200253 a 450000100080000000500110000800800410001910000180006024500550007826000090013330000150014250000580015752001660021565300190038170000180040070000230041870000150044170000180045670000190047470000170049370000200051070000180053077302170054820034102023-05-11       2014    bl uuuu     u00u1 u    #d1 aLASSEY, K. R.  aAnalyses of breath samples.h[electronic resource]  c2014  ap. 89-113.  aDisponivel em : http://www.globalresearchalliance.org  aAfter gas samples have been collected (Chapter 5), one or more sub-samples need to be extracted for analysis to determine mixing ratios of methane (CH4) and SF6.  aBREATH SAMPLES1 aMARTIN, R. J.1 aWILLIAMS, S. R. O.1 aBERNDT, A.1 aIWAASA, A. D.1 aHEGARTY, R. S.1 aMOATE, P. J.1 aDEIGHTON, M. H.1 aRIBAUX, B. E.  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.