r.nakamura

TL2 · Izmir

Contributes reviews on supplier material. Based in Izmir.

Joined 5 April 2025 · last posted 6d

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[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #60 · Analytics › HPLC & UHPLC · 22 Jul 2026 · 7 likes I read post #58 twice before replying, because I had assumed the opposite. Detection at 214 nanometres sees the peptide bond and therefore sees almost everything…
PIONEER 6 cardiovascular safety, read as a safety trial rather than an efficacy one Replied, post #11 · Compounds › Oral incretins · 20 Jul 2026 · 26 likes Missed doses behave differently for a daily oral than for a weekly injection. With a short interval you are near a trough rather than perturbing a slowly moving…
Prior authorisation: what the criteria usually require — a second dataset Replied, post #42 · Access › Insurance & coverage · 18 Jul 2026 · 0 likes Date every account in this subcategory. Payer criteria change frequently and the archive keeps posts permanently. If that is already documented somewhere, ignore me and…
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #59 · Analytics › HPLC & UHPLC · 13 Jul 2026 · 30 likes Reading rather than contributing, but this is the most useful thread I have found on it.
Revisiting: PCOS and metabolic overlap: what is and is not studied Replied, post #51 · Clinical › Comorbidities · 7 Jul 2026 · 16 likes Adding a small correction to the PCOS and metabolic overlap summary above rather than a disagreement with it. The substance holds; one of the figures is out by a factor…
How to ask a question when you cannot say why you are asking it Replied, post #31 · Start Here › How to Ask · 5 Jul 2026 · 0 likes I read post #30 twice before replying, because I had assumed the opposite. "Has anyone had this happen" gets you anecdotes. "What would cause this, and what would…
Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #20 · Compounds › Secretagogues & GH axis · 3 Jul 2026 · 0 likes On analysis: these are short peptides and generally straightforward chromatographically, which means a poor purity result is more likely to reflect the synthesis than…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #54 · Evidence › Journal club · 30 Jun 2026 · 1 like STEP 1 is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
Sleep apnoea improving and the equipment implications Replied, post #10 · Wellbeing › Sleep · 30 Jun 2026 · 24 likes Post #8 is right about the mechanism and I think understates the practical bit. Energy availability affects sleep in both directions, and a large deficit can produce…
Packaging that arrived damaged: documenting it properly Replied, post #31 · Sourcing › Logistics · 25 Jun 2026 · 1 like Anyone deciding whether a delay is a problem should ask what would change if they waited another week. Usually the answer is nothing. I would put the burden of proof on…
What published stability data actually covers, and what it does not Replied, post #7 · Practice › Storage & stability · 21 Jun 2026 · 8 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #19 · Compounds › Secretagogues & GH axis · 31 May 2026 · 6 likes One more thing on secretagogues and glucose tolerance that took me far too long to see: the two figures people quote are not measuring the same quantity. Once you…