chromatogram
TL4 Analytical chemist · Ghent, BE
Reversed-phase peptide separations for a living. I will read your chromatogram if you post the axes, the gradient, and the injection volume. Without those it is a picture, not data.
Joined 19 May 2024 · last posted 4h · groups: analytical-chemists, wiki-editors, regional-na, trust-level-4
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When a network meta-analysis is defensible and when it is not Replied, post #3 · marked as the solution · Evidence › Meta-analyses · 28 Jul 2026 · 7 likes Sensitivity analysis: the authors re-run the meta-analysis excluding studies one at a time, or by quality, to see whether the pooled estimate changes. Robust results…
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Revisiting: Theoretical plates: useful number or ritual? Replied, post #22 · Analytics › HPLC & UHPLC · 26 Jul 2026 · 5 likes Gradient delay volume differs between instruments and shifts the whole chromatogram. It is why a transferred method rarely reproduces retention times exactly on a…
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What is genuinely unknown about long-term amylin agonism Replied, post #88 · Compounds › Cagrilintide & amylin analogues · 26 Jul 2026 · 28 likes Post #86 put the caveat in the right place and I want to underline it. Reconstitution at higher concentrations is worth avoiding for aggregation-prone material. The…
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Second pass at: Sleep apnoea improving and the equipment implications Replied, post #95 · Wellbeing › Sleep · 25 Jul 2026 · 33 likes Eating patterns shift substantially and late intake affects sleep independently of anything pharmacological. One case, stated as one case.
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Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #110 · Evidence › Journal club · 24 Jul 2026 · 0 likes Following this. I have the same question and no better information than the first post.
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Forced degradation studies: designing one that is informative Replied, post #104 · Analytics › Method validation · 22 Jul 2026 · 0 likes Small correction to my own earlier position on forced degradation studies. I had the units the wrong way round, which changes the conclusion by an order of magnitude…
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Ultrasound and skinfolds: operator dependence in practice Replied, post #70 · Outcomes › Body composition · 22 Jul 2026 · 17 likes Post #67 is the version of this I will quote in future. One addition. Adding the boring version of ultrasound and skinfolds, because the interesting version keeps…
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A structured critique template this community uses Replied, post #2 · Evidence › Study critique · 22 Jul 2026 · 0 likes Where a critique rests on a subgroup, check whether the interaction was tested. A difference between subgroups that is not statistically supported is not a difference.…
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I joined for one answer and stayed for a year — what changed my mind Replied, post #99 · Start Here › Welcome · 21 Jul 2026 · 10 likes The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the meta questions like "do we have data on this" and…
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Publication patterns in the BPC-157 literature, examined Replied, post #39 · Compounds › Repair & healing peptides · 19 Jul 2026 · 12 likes Two people in this thread mean different things by publication patterns and are disagreeing about the definition while believing they are disagreeing about the facts.…
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A structured critique template this community uses — a second dataset Replied, post #41 · Evidence › Study critique · 17 Jul 2026 · 3 likes Two things can be true about structured critique template at once: the mechanism is plausible and the evidence for the size of the effect is thin. Most of the argument…
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Revisiting: Protein density versus volume when you cannot eat much Replied, post #64 · Nutrition & Training › Protein & intake · 14 Jul 2026 · 0 likes This follows post #61 rather than contradicting it. On Protein density versus volume, I would rather understate and be corrected upward than overstate and be quoted.…
Maintains 4 documents
- Orforglipron — referenceReview due 11 Jun 2027
- Access notes: FranceReview due 10 May 2027
- Access notes: AustraliaReview due 21 Jan 2027
- Bacterial endotoxin testingReview due 26 Feb 2027