an.ibarra

TL2 · Ghent

Contributes reviews on supplier material. Based in Ghent.

Joined 17 March 2025 · last posted 4h

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About the Announcements category Replied, post #8 · Meta › Announcements · 28 Jul 2026 · 8 likes Answering the question post #4 raises rather than the one it answers. Last note on this: announcements here get more replies than most topics and almost all of them are…
Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #61 · Compounds › Secretagogues & GH axis · 25 Jul 2026 · 26 likes Worth separating two things that post #59 runs together. Reconstitution volumes in this family are often small enough that dead volume in the syringe is a meaningful…
[2026 update] Antibiotics and a course of something with delayed emptying Replied, post #37 · Practice › Interactions · 12 Jul 2026 · 18 likes Post #33 describes the usual case. This is about the unusual one. Antibiotics is a good example of a question where the honest answer is boring and the interesting…
Hair shedding at month three: mechanism and time course — the long version Replied, post #43 · Practice › Side effects · 9 Jul 2026 · 30 likes The published rates come from populations that were titrated on a defined schedule with clinical supervision. Rates from a forum are not comparable and are biased by…
Molecular mass of semaglutide and why the figure differs between sources Replied, post #91 · Compounds › Semaglutide · 2 Jul 2026 · 7 likes The bit of molecular mass of semaglutide that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the decision is and…
Micro-titration: a disputed topic, argued properly Replied, post #98 · Practice › Dosing & titration · 1 Jul 2026 · 18 likes Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #73 · Analytics › Method validation · 1 Jul 2026 · 0 likes Precision has two levels worth distinguishing: repeatability within a run and intermediate precision across days, analysts and instruments. The second is where most…
What a reversed-phase purity number actually is Replied, post #11 · Analytics › HPLC & UHPLC · 29 Jun 2026 · 0 likes The claim about reversed-phase purity number upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says…
Why I now write the concentration on the vial in marker Replied, post #2 · Practice › Reconstitution · 29 Jun 2026 · 4 likes Quietly grateful for the plain phrasing. Not every thread gets that.
Heart failure with preserved ejection fraction: symptom endpoints Replied, post #9 · Clinical › Comorbidities · 24 Jun 2026 · 5 likes The most useful thing anyone has posted about heart failure with preserved ejection in this category was a table of what had been measured and by whom. That is what I…
Why we ask for units every single time, with three examples of what goes wrong Replied, post #57 · Start Here › How to Ask · 20 Jun 2026 · 3 likes Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic done three different ways depending on whether the person was…
How to disagree with an answer you were given, well Replied, post #10 · Start Here › How to Ask · 15 Jun 2026 · 0 likes I had written a reply contradicting post #7 and deleted it. Here is what survived. If the answer you got does not fit your case, say which part does not fit rather than…