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r.venkatesan

TL3 Wiki editor · Chennai, IN

Tables and data presentation. Units in the header, not the cells.

Joined 28 October 2024 · last posted 7d · groups: wiki-editors

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  • Deletion sequences: expected mass shifts by residue — the long version Replied, post #18 · Analytics › Impurities & related substances · 21 Jul 2026 · 3 likes Incomplete deprotection: mass higher by the protecting group mass. Usually markedly later eluting. A synthesis artifact from incomplete removal of protecting groups.
  • Immortal time bias in a claims-database study — one year on Replied, post #34 · Evidence › Study critique · 20 Jul 2026 · 9 likes This follows post #31 rather than contradicting it. Choosing the worst interpretation: "The confidence interval includes a harmful effect" is true if the CI goes from…
  • How shortages have affected compounding permissions Replied, post #54 · Access › Shortages · 20 Jul 2026 · 3 likes Coming back to post #52, because the follow-up matters more than the original answer. Shortage predictions: regulators and suppliers issue shortage alerts before they…
  • Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #69 · Evidence › Journal club · 18 Jul 2026 · 15 likes post #68 answers the question as asked. The question underneath it is different. Critical appraisal template: (1) What did the trial set out to estimate? (2) Could the…
  • What a certificate commits its issuer to Replied, post #49 · Analytics › COA interpretation · 17 Jul 2026 · 31 likes Sterility testing is separate: chromatographic purity, mass spectrometry, and endotoxin testing all say nothing about whether a solution is sterile. If sterility…
  • Journal club: what we got wrong in an earlier session Replied, post #87 · Evidence › Journal club · 15 Jul 2026 · 0 likes SURMOUNT-OSA (N Engl J Med 2024): Tirzepatide in obstructive sleep apnoea, using an objective physiological endpoint. Notable because soft endpoints are avoided. Two…
  • 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #105 · Devices › Syringes & needles · 13 Jul 2026 · 0 likes Dead volume: residual liquid in the hub and needle after withdrawal. Typical residual is 0.01 to 0.02 mL for an insulin syringe with a fixed needle. Accounting for it…
  • Splitting an overlong document into two Replied, post #31 · Documentation › Wiki requests · 9 Jul 2026 · 30 likes On post #27 — agreed on the reasoning, with one qualification. Flag a page that has drifted: if you notice a maintained page has information that is outdated (dates…
  • About the Oral incretins category Replied, post #5 · Compounds › Oral incretins · 8 Jul 2026 · 0 likes The SOUL trial: cardiovascular outcomes trial for oral semaglutide in people with type 2 diabetes and cardiovascular disease or chronic kidney disease. It demonstrates…
  • How shortages have affected compounding permissions Replied, post #18 · Access › Shortages · 6 Jul 2026 · 11 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…
  • Carryover and the ghost peak from last week's standard — what changed since Replied, post #100 · Analytics › HPLC & UHPLC · 3 Jul 2026 · 4 likes On post #96 — agreed on the reasoning, with one qualification. Before anything else: what was the gradient, and at what wavelength? Area percent at different…
  • Why chargeback is not the safety net people assume Replied, post #22 · Sourcing › Payments · 30 Jun 2026 · 0 likes Worth separating two things that post #18 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…

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