As started before, the good Doktor is a large man, who appears to have consumed enough Guinness to result in a large belly hanging over his loose jeans, which are held up by suspenders. A belt would not do the job, only squeeze them down. He has receding grey hair that sticks up in a stiff crew cut.
During the break, he's behind the court reporter, helping her correct technical terms in the official transcript.
BRUNET: Welcome back.
BARNETT: exhibit numbers?
[ YOUNG and BARNETT will take any opportunity to interrupt the flow ]
q: on this slide, why did you circle these points.
a: if you can look at the same time time. sometimes sometimes the mass spec 2/1 trace is not good enough to rely on exclusively. If you have a peak with similar composition as background, you need other data. Similarly, the 44 trace is the same; you need all the data.
SUH GDC 1313, p 147 148
[ Landis is awake, with eyes wide open ]
Q: 44/45 trace cited by brenna is the reason we shouldn't have co-elution. Does this paper show that isn't enough?
a: the previous slide shows the chormatogram has peaks, but nothing in the 2/1 trace.
[ slide illustrating background subtrationc impacd C13 delta values. "The software will not separate your peaks, and neither will manual processing" ]
a: case 1, overlaps lead to inaccuracy; case 2 baseline slope; case 3, isotope skew with manual processing. If both were really -25, you could appear to get -24 and -26 for adjacent peaks.
BARNETT: slideshow as exhibit?
BARNETT: exhibits were due earlier
BURNET: can we get copies in 15 minutes.
BARNETT: complains about note to Weiss.
q: in your opinion, does LNDD BG sub lose carbon isotope information?
a: her's an example from a paper by Dr. Brenna.
YOUNG: [ interrupts over identification ]
slide "the tail of the leading EMG function extends into the second peak, leading to erronesous abundance and isotope ration" (from Brenna)
q: what's happening here?
a: the correction for baseline is cutting away peak information.
BARNETT: [ interrrupts again on ex number ]
q: did you see if these problems exist in other chromatograms
BARNETT: I've never seen direct like this! Improper direct, cites should be present in slide show.
CAMPBELL: you're eating your time.