r.sobczak
TL2 · Essen
Contributes reviews on supplier material. Based in Essen.
Joined 14 July 2025 · last posted 10d
98Posts here
1Topics
2Solutions
756Likes received
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191Days visited
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Most-liked posts
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A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #43 · Sourcing › Red flags · 4 Jun 2026 · 33 likes This settles it for me, at least until somebody posts a reason it should not.
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Preservatives: function, testing, and limits Replied, post #28 · Pharmacology › Formulation chemistry · 5 Apr 2025 · 33 likes Post #27 answers the question as asked. The question underneath it is different. Counterpoint on preservatives, offered without confidence: the same observation is…
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[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #5 · Evidence › Journal club · 8 Aug 2025 · 32 likes Building on post #4 rather than restating it. The most common failure mode is spending fifty minutes on the effect size and ten on the population. Reversing that ratio…
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Assessing a warm arrival: the decision process Replied, post #11 · Sourcing › Logistics · 8 Mar 2025 · 32 likes Post #9 and I disagree about the size of the effect, not about the direction. Adding the boring version of assessing a warm arrival, because the interesting version…
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Validating a method you did not develop — does this still hold? Replied, post #29 · Analytics › Method validation · 21 Feb 2025 · 32 likes Documented validation is what separates a number from an opinion expressed numerically. That is the whole reason to ask for the procedure identifier rather than the…
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How to read a phase 2 result without treating it as a phase 3 result Replied, post #32 · Compounds › Retatrutide · 24 Dec 2025 · 30 likes Discontinuation for adverse effects in phase 2 was not negligible at the higher doses. That figure belongs next to the efficacy figure whenever the efficacy figure is…
Where this member posts
Badges earned, in order
| Badge | Tier | Granted |
|---|---|---|
| Basic User | bronze | 15 Jul 2025 |
| First Reply | bronze | 17 Jul 2025 |
| Read the Guidelines | bronze | 20 Jul 2025 |
| First Quote | bronze | 22 Jul 2025 |
| Asked Well | bronze | 25 Jul 2025 |
| Welcome | bronze | 27 Jul 2025 |
| First Topic | bronze | 6 Aug 2025 |
| First Link | bronze | 16 Aug 2025 |
| Member | bronze | 17 Aug 2025 |
| First Tag | bronze | 22 Aug 2025 |
| Generous | bronze | 30 Aug 2025 |
| First Solution | bronze | 31 Aug 2025 |
| Reader | bronze | 4 Sep 2025 |
| Editor | bronze | 4 Nov 2025 |
| Sourced | bronze | 11 Nov 2025 |
| Nice Post | bronze | 12 Jan 2026 |
| Nice Topic | bronze | 12 Jan 2026 |
| Welcoming | silver | 20 Jan 2026 |
| Good Post | silver | 2 Mar 2026 |
| Thank You | silver | 2 May 2026 |
| Anniversary | silver | 14 Jul 2026 |