l.ferreira
TL2 · Uppsala
Contributes reviews on supplier material. Based in Uppsala.
Joined 25 August 2025 · last posted 3d
84Posts here
2Topics
0Solutions
1kLikes received
1.4kLikes given
19Badges
196Days visited
4.1kPosts read
Recent activity
Full stream-
Which categories are strict and which are relaxed, honestly Replied, post #50 · Start Here › Welcome · 25 Jul 2026 · 0 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
-
Does a peptide degrade silently, with no visual change? Replied, post #77 · Practice › Storage & stability · 23 Jul 2026 · 0 likes Freezing a reconstituted peptide solution is not automatically protective. Freeze-thaw cycling is one of the harsher things you can do to a protein in solution, and a…
-
Why a glucagon receptor agonist in a weight-loss compound is not a contradiction Replied, post #43 · Compounds › Retatrutide · 22 Jul 2026 · 0 likes I read post #41 twice before replying, because I had assumed the opposite. On identity confirmation more generally: for a compound with no widely available reference…
-
I joined for one answer and stayed for a year — what changed my mind Replied, post #93 · Start Here › Welcome · 19 Jul 2026 · 3 likes Agreed on all of that, and I have nothing to add to it.
-
Seven-day rolling means and why weekly readings mislead Replied, post #23 · Outcomes › Progress reports · 13 Jul 2026 · 0 likes A single scale used throughout beats a more accurate scale introduced halfway through. Consistency beats accuracy for a trend.
-
I joined for one answer and stayed for a year — what changed my mind Replied, post #72 · Start Here › Welcome · 10 Jul 2026 · 26 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
-
Review: a draft on reconstitution arithmetic, with objections — what changed since Replied, post #37 · Documentation › Doc review · 7 Jul 2026 · 0 likes I read post #36 twice before replying, because I had assumed the opposite. Adding the boring version of draft on reconstitution arithmetic, because the interesting…
-
Why this subcategory is stricter about sourcing than most Replied, post #51 · Compounds › Secretagogues & GH axis · 3 Jul 2026 · 12 likes On post #47 — agreed on the reasoning, with one qualification. Storage: these are lyophilised short peptides and are generally reasonably stable dry and considerably…
-
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #72 · Wellbeing › Sleep · 30 Jun 2026 · 26 likes Appreciated. The plain phrasing does more work here than a longer post would.
-
What to include when your question involves a chromatogram — one year on Replied, post #55 · Start Here › How to Ask · 28 Jun 2026 · 22 likes On post #51 — agreed on the reasoning, with one qualification. Questions you cannot explain: "I cannot say why I am asking this, but is this compound stable at room…
-
Aggregate verification data across the directory, with caveats Replied, post #7 · Sourcing › Independent verification · 21 Jun 2026 · 0 likes The lot identifier has to match across vial, certificate and invoice for any of this to mean anything. It is the floor and it is worth checking every time. Two sources,…
-
Blinding yourself: practical methods and their limits Replied, post #35 · Research Methods › N-of-1 designs · 18 Jun 2026 · 4 likes That is clearer than the version I had in my head. Thank you.