H. Liu

3 Questions 25 Answers 0 Followers

Questions related from H. Liu

What is this contaminant with m/z @ 248.9718 ?

What is this contaminant with m/z @ 248.9718 (+/- 0.0010)? Have you seen this ion? What is it? Instrument: Agilent 6550 Q-TOF; In ESI negative mode; Water/Acetonitrile as mobile phase; The...

13 September 2019 7,012 9 View

How to tell whether metabolite XCONH2 is produced mainly from the parent compound (XCONHR) or from its hydroxylation metabolite (XCONHROH)?

An amide (XCONHR) produces a hydroxylation metabolite (XCONHROH), which is a dominant metabolite, and a dealkylation metabolite (XCONH2), in rat. How to tell whether metabolite XCONH2 is produced...

24 August 2017 3,142 5 View

Defined-level aspiration by manual pipetting

Defined-level (pipette immersion depth) by manual pipetting is tricky, like aliquoting the supernatant after protein precipitation. PipetteRite ( prep-free.com ) seems to be an interesting...

01 January 1970 3,179 0 View