c.ramos
TL2 Moderator · Linköping
Contributes reviews on supplier material. Based in Linköping.
Joined 5 March 2025 · last posted 1d
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Does a peptide degrade silently, with no visual change? Replied, post #80 · Practice › Storage & stability · 27 Jul 2026 · 29 likes Coming back to post #78, because the follow-up matters more than the original answer. Beyond-use dating: the date after which a prepared solution should not be used. It…
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Forced degradation studies: designing one that is informative Replied, post #107 · Analytics › Method validation · 26 Jul 2026 · 3 likes Specificity: the method can distinguish the intended compound from related impurities and degradation products. Tested by comparing results on pure compounds, mixtures…
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Revisiting: What pooling buys you and what it destroys Replied, post #106 · Evidence › Meta-analyses · 26 Jul 2026 · 0 likes Picking up post #103: that is the part I would want checked first. Study quality and weighting: some meta-analyses weight all studies equally; others weight by study…
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What a certificate commits its issuer to Replied, post #60 · Analytics › COA interpretation · 19 Jul 2026 · 0 likes Water content (residual moisture) matters: lyophilised peptide is not dry. A few percent water is normal. The difference between a TFA salt and an acetate salt can be…
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Revisiting: Protein density versus volume when you cannot eat much Replied, post #67 · Nutrition & Training › Protein & intake · 15 Jul 2026 · 9 likes I read post #65 twice before replying, because I had assumed the opposite. Protein sources: animal sources (meat, fish, eggs, dairy) are denser and easier to hit…
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[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #79 · Sourcing › Independent verification · 10 Jul 2026 · 0 likes I read post #77 twice before replying, because I had assumed the opposite. Medutest: combined purity and identity reporting. Appears throughout vendor documentation.…
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Secretagogues and glucose tolerance: the mechanistic concern Replied, post #64 · Compounds › Secretagogues & GH axis · 6 Jul 2026 · 0 likes IGF-1 as a surrogate: it is a better integrated measure than a spot growth hormone level and it is still a surrogate, with all the caveats that come with surrogates.…
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Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #43 · Pharmacology › Pharmacokinetics · 6 Jul 2026 · 2 likes Worth separating two things that post #39 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did…
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Revisiting: What pooling buys you and what it destroys Replied, post #47 · Evidence › Meta-analyses · 8 Jun 2026 · 11 likes Number needed to treat from a meta-analysis: can be computed from the pooled estimate if the baseline risk is specified. More interpretable than pooled relative effects.
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Vomiting: when it is expected and when it is a reason to stop — one year on Replied, post #11 · Practice › Side effects · 28 May 2026 · 0 likes post #10 is right about the mechanism and I think understates the practical bit. Constipation: common, manageable, and frequently under-reported because it is not…
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Area percent versus weight percent: the confusion that causes most arguments Replied, post #12 · Analytics › HPLC & UHPLC · 26 May 2026 · 18 likes On integration: where the baseline is drawn matters more than most people realise. On a clean chromatogram with well-resolved peaks the choice is inconsequential. On a…
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An 18-month record including the parts that went badly Replied, post #24 · Outcomes › Progress reports · 25 May 2026 · 20 likes Exercise volume changes: increasing exercise intensity or duration can mask weight loss (muscle gain) on the scale. Noting exercise changes when reporting weight helps…