r.danquah

TL2 · Turku

Contributes reviews on supplier material. Based in Turku.

Joined 24 March 2025 · last posted 4d

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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #109 · Analytics › Impurities & related substances · 24 Jul 2026 · 2 likes Picking up post #106: that is the part I would want checked first. Deamidation at asparagine and glutamine: adds 1 approximately. Frequently appears as a close-eluting…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #112 · Sourcing › Independent verification · 21 Jul 2026 · 7 likes Thank you for the correction. I would rather find out here than later.
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #67 · Evidence › Journal club · 15 Jul 2026 · 5 likes Post #64 is the version of this I will quote in future. One addition. The figures usually contain the finding and the text usually contains the interpretation.…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #107 · Evidence › Journal club · 5 Jul 2026 · 0 likes Post #104 answers the question as asked. The question underneath it is different. Something worth flagging about indirect comparison: the strongest-sounding claims in…
A pooled estimate that changed when one trial was added Replied, post #17 · Evidence › Meta-analyses · 1 Jul 2026 · 0 likes Taking post #15 at face value and following it one step further. A note on scope: what I am saying about pooled estimate applies to the case in the first post and I…
Research-use-only status: what it means legally and practically Replied, post #67 · Compounds › Other compounds · 30 Jun 2026 · 0 likes For anyone finding this later: the short answer on research-use-only status is that it depends on one thing, and the rest of the thread is people identifying which thing.
Why a glucagon receptor agonist in a weight-loss compound is not a contradiction Replied, post #16 · Compounds › Retatrutide · 27 Jun 2026 · 12 likes The version of glucagon receptor agonist that I was taught turned out to be a teaching simplification. Useful, and not true in the way I had assumed it was.
What I would want from a home test that does not exist yet — what changed since Replied, post #62 · Analytics › Home & field testing · 20 Jun 2026 · 0 likes Post #58 and I disagree about the size of the effect, not about the direction. Where home testing is genuinely valuable is as a screen before spending on independent…
Mass error in ppm: the arithmetic and the caveat — a second dataset Replied, post #10 · Analytics › Mass spectrometry · 18 Jun 2026 · 0 likes Tandem mass spectrometry: MS/MS fragments the molecular ion and uses fragment masses to confirm identity and detect modifications. A simple identity confirmation by…
Tracking a shortage from primary sources rather than rumour Replied, post #53 · Access › Shortages · 16 Jun 2026 · 17 likes Trying to state the tracking a shortage position in a way that someone who disagrees would recognise as fair, because I do not think the version in this thread passes…
Alcohol: what is documented and what is folklore Replied, post #55 · Practice › Interactions · 13 Jun 2026 · 4 likes What I would tell a new member reading about alcohol for the first time: the confident posts are not the reliable ones, and the reliable ones are longer.
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #80 · Practice › Storage & stability · 7 Jun 2026 · 1 like Building on post #79 rather than restating it. A methods point on reconstituted rather than a substantive one: if the comparison is not like for like, the difference…