b.kowalski

TL2 · Oulu

Contributes reviews on supplier material. Based in Oulu.

Joined 28 September 2024 · last posted 12d

93Posts here

3Topics

1Solutions

187Likes received

240Likes given

22Badges

126Days visited

1.1kPosts read

Recent activity

Full stream

The most useful thing you learned here that was not the answer you came for Replied, post #59 · Lounge › Off topic · 16 Jul 2026 · 0 likes Digression worth the space: the archive is starting to be genuinely long. There are questions here whose good answer is four years old and still correct, and that only…
What a certificate commits its issuer to Replied, post #29 · Analytics › COA interpretation · 14 Jul 2026 · 28 likes Residual solvent screening is not standard on these documents and its presence is a signal about the manufacturer's own systems rather than about the vial. Posting it…
Revisiting: The best-written scientific paper you have read Replied, post #77 · Lounge › Off topic · 8 Jul 2026 · 4 likes Best-written scientific paper would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #98 · Devices › Syringes & needles · 7 Jul 2026 · 22 likes Post #94 describes the usual case. This is about the unusual one. Dead volume: residual liquid in the hub and needle after withdrawal. Typical residual is 0.01 to 0.02…
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #39 · Analytics › Mass spectrometry · 6 Jul 2026 · 7 likes Reframing 2 ppm match slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen", yes. If it is "how…
Revisiting: Protein density versus volume when you cannot eat much Replied, post #36 · Nutrition & Training › Protein & intake · 6 Jul 2026 · 2 likes Eating anything at all: on substantial appetite suppression, eating enough total calories to maintain lean mass is the priority. Protein comes second to total intake.…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #65 · Evidence › Journal club · 28 Jun 2026 · 6 likes Reading order that works for these sessions: registry entry, methods, baseline table, primary result, then abstract last. Reading the abstract first anchors everything…
What a reversed-phase purity number actually is Replied, post #6 · Analytics › HPLC & UHPLC · 27 Jun 2026 · 6 likes Purity by chromatography answers "what proportion of what I detected is the intended species". It does not answer how much is in the vial, which is a separate assay.
Programming during a large energy deficit Replied, post #25 · Nutrition & Training › Resistance training · 26 Jun 2026 · 0 likes Maintenance is the goal: preserving lean mass and strength during weight loss is the goal of resistance training in this context, not building new muscle. That goal is…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #83 · Practice › Reconstitution · 14 Jun 2026 · 32 likes The best check on any reconstitution calculation is to do it twice by two different routes — mass per volume, then volume per dose — and see whether they agree. They…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #48 · Analytics › Home & field testing · 12 Jun 2026 · 24 likes The most useful home practice is not a test at all: photograph the vial, the cake, the label and the document on arrival. It costs nothing and it is the evidence you…
Injecting into an area that has become firm: why not to Replied, post #42 · Practice › Administration · 9 Jun 2026 · 0 likes Drawing up with one needle and injecting with another: a reasonable practice if you have extra needles. Fresh needle for injection reduces tissue drag and can decrease…