h.castellanos

TL2 Moderator · Antalya

Contributes reviews on supplier material. Based in Antalya.

Joined 20 September 2024 · last posted 3d

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[2026 update] Regional warehouse stock versus direct despatch Replied, post #146 · Sourcing › Logistics · 25 Jul 2026 · 17 likes On post #142 — agreed on the reasoning, with one qualification. Two things before anyone answers the substance. First, the context in the first post is clear and…
Prior authorisation: what the criteria usually require — a second dataset Replied, post #54 · Access › Insurance & coverage · 22 Jul 2026 · 0 likes post #53 is right about the mechanism and I think understates the practical bit. Reimbursement changes: a compound covered one year might not be the next. A formulary…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #128 · Evidence › Journal club · 22 Jul 2026 · 2 likes Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
Insurance and replacement policies, compared Replied, post #96 · Sourcing › Logistics · 17 Jul 2026 · 1 like Insurance and carrier liability: most parcel carriers limit liability. Understanding the limits before choosing a carrier matters if you are shipping expensive material.
What I would want from a home test that does not exist yet — what changed since Replied, post #98 · Analytics › Home & field testing · 17 Jul 2026 · 0 likes This follows post #95 rather than contradicting it. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still…
[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #41 · Analytics › HPLC & UHPLC · 16 Jul 2026 · 3 likes Reversed-phase separates on hydrophobicity. A peptide is retained on a non-polar stationary phase and eluted by increasing organic solvent. For peptides the mobile…
Second pass at: Absence of evidence and evidence of absence Replied, post #45 · Research Methods › Statistics · 14 Jul 2026 · 1 like This follows post #42 rather than contradicting it. P-values and significance: p
Primary endpoint hierarchies and why order matters — one year on Replied, post #41 · Evidence › Trials · 10 Jul 2026 · 7 likes Picking up post #38: that is the part I would want checked first. Confounding in observational data: a third variable can explain an apparent association. In a…
Hair shedding at month three: mechanism and time course — the long version Replied, post #39 · Practice › Side effects · 3 Jul 2026 · 4 likes Injection site reaction: local erythema, nodules, or induration at injection sites is reported by some people. Site rotation, avoiding reinjection into the same area…
Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #12 · Evidence › Journal club · 1 Jul 2026 · 0 likes post #11 is right about the mechanism and I think understates the practical bit. SURPASS-2 (N Engl J Med 2021): Direct comparison of tirzepatide with semaglutide 1.0…
The anatomy of a question that gets answered within an hour Replied, post #94 · Start Here › How to Ask · 29 Jun 2026 · 12 likes On post #90 — agreed on the reasoning, with one qualification. Arithmetic questions: write out the steps. "I have a 10 mg vial, I added 2 mL, I want a 0.25 mg dose, and…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #86 · Data & Tools › Datasets · 26 Jun 2026 · 10 likes Worth separating two things that post #82 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…