ca.vermeulen
TL2 Moderator · Monterrey
Contributes reviews on supplier material. Based in Monterrey.
Joined 20 November 2024 · last posted 10h
86Posts here
0Topics
1Solutions
1kLikes received
428Likes given
19Badges
176Days visited
3kPosts read
Recent activity
Full stream-
Endotoxin and why it is a separate question from purity — what changed since Replied, post #92 · Analytics › Impurities & related substances · 27 Jul 2026 · 26 likes post #91 is right about the mechanism and I think understates the practical bit. I disagree with the reply above, and I think the disagreement is substantive rather…
-
Fasting versus non-fasting and which tests care Replied, post #73 · Clinical › Bloodwork · 19 Jul 2026 · 0 likes Fasting state: some lab tests require fasting; others do not. Lipids on a fasting draw differ from lipids on a fed draw. Always note whether the test was fasting when…
-
Reading order for a first week here, and what to skip until later — what changed since Replied, post #20 · Start Here › Welcome · 7 Jul 2026 · 0 likes On post #16 — agreed on the reasoning, with one qualification. Introducing yourself is fine and requires no question. Post in this subcategory, describe the context…
-
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #97 · Evidence › Preprints · 5 Jul 2026 · 0 likes What changes between preprint and publication: authors respond to reviewer comments, re-analyse data, correct errors found in peer review, and sometimes report…
-
Injecting into an area that has become firm: why not to Replied, post #82 · Practice › Administration · 16 Jun 2026 · 0 likes This follows post #79 rather than contradicting it. Injecting into an area that has become firm: lipohypertrophy — thickened fatty tissue from repeated injection in one…
-
Micronutrient adequacy at low total intake Replied, post #93 · Nutrition & Training › Protein & intake · 14 Jun 2026 · 7 likes Protein sources: animal sources (meat, fish, eggs, dairy) are denser and easier to hit targets with. Plant sources require higher volume. Neither is nutritionally…
-
A single out-of-range value on an otherwise normal panel Replied, post #59 · Clinical › Bloodwork · 14 Jun 2026 · 14 likes Coming back to post #57, because the follow-up matters more than the original answer. Having read the exchange above, I think I was wrong earlier in this topic and I…
-
Injecting into an area that has become firm: why not to Replied, post #61 · Practice › Administration · 13 Jun 2026 · 32 likes Injection discomfort: comes from needle gauge (finer = less discomfort), volume (smaller = less discomfort), temperature (room temperature or warmed is less…
-
Mass error in ppm: the arithmetic and the caveat — a second dataset Replied, post #8 · marked as the solution · Analytics › Mass spectrometry · 12 Jun 2026 · 20 likes Common adducts: sodium adds ≈22, potassium adds ≈38 compared to hydrogen. A [M+Na]+ peak is common and its mass is predictable from the base mass.
-
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #79 · Practice › Reconstitution · 11 Jun 2026 · 13 likes Picking up post #76: that is the part I would want checked first. Swirling versus inverting versus leaving it alone: the vial can be gently warmed (hands around it) and…
-
A parcel stationary at a customs facility for nine days — does this still hold? Replied, post #25 · Sourcing › Logistics · 5 Jun 2026 · 10 likes Coming back to post #23, because the follow-up matters more than the original answer. Documentation after arrival: photograph the parcel and its contents on arrival. If…
-
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #23 · Analytics › Mass spectrometry · 4 Jun 2026 · 0 likes Worth separating two things that post #19 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…