j.erdogan

TL2 · Kolkata

Contributes reviews on supplier material. Based in Kolkata.

Joined 5 August 2025 · last posted 7d

71Posts here

3Topics

0Solutions

827Likes received

361Likes given

23Badges

168Days visited

3.1kPosts read

Recent activity

Full stream

Reflectance and photometric devices: precision in practice — a second dataset Replied, post #78 · Analytics › Home & field testing · 21 Jul 2026 · 2 likes Everything in post #76 holds. The case it does not cover is the one I have. The right question for any home test is: what physical quantity does it measure, and what…
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #61 · Analytics › HPLC & UHPLC · 16 Jul 2026 · 24 likes Post #60 and I disagree about the size of the effect, not about the direction. Before anything else: what was the gradient, and at what wavelength? Area percent at…
eGFR fluctuation and the creatinine denominator problem — the long version Replied, post #6 · Clinical › Bloodwork · 16 Jul 2026 · 0 likes One caution on egfr fluctuation: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and is rarely stated.
How much context is too much context in a first post? Replied, post #69 · Start Here › How to Ask · 10 Jul 2026 · 8 likes On post #66 — 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…
Second pass at: Metformin co-administration and additive GI effects Replied, post #141 · Practice › Interactions · 6 Jul 2026 · 27 likes I would keep Metformin co-administration and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and…
Endotoxin and why it is a separate question from purity — what changed since Replied, post #62 · Analytics › Impurities & related substances · 30 Jun 2026 · 0 likes Two sentences on Endotoxin and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What is inferred…
Asking a follow-up: new topic or new reply? Replied, post #27 · Start Here › How to Ask · 27 Jun 2026 · 1 like It is fine to say you cannot explain why you are asking. Nobody will press, and the technical part of the question can usually be answered without the context.
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #50 · Evidence › Journal club · 25 Jun 2026 · 0 likes The confident answers on STEP 1 and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.
Revisiting: The best-written scientific paper you have read Replied, post #41 · Lounge › Off topic · 20 Jun 2026 · 32 likes Newer drugs and mechanisms: when a new drug launches or a new mechanism is discovered, the Lounge is a place to discuss the news and speculate before hard data exists.…
Prescription requirements and telehealth models — a second dataset Replied, post #67 · Sourcing › Regulatory · 16 Jun 2026 · 17 likes Prescription requirements and telehealth models is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #26 · Pharmacology › Pharmacokinetics · 16 Jun 2026 · 20 likes Narrowing post #25, because the general version has more than one answer. Washout after stopping takes roughly the same four to five half-lives as reaching steady…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #71 · Devices › Syringes & needles · 13 Jun 2026 · 3 likes A definition problem is doing most of the work in this 0.3 ml versus 0.5 ml discussion. Once the term is pinned down I suspect the disagreement mostly goes away and…