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On the live site this tab tracks what you have not read. In this static rendering it shows every topic with activity in the last 45 days, which is the closest honest equivalent — we would rather explain the difference than pretend a static page knows your reading history.

414 topics · page 2 of 14

Topic	Participants	Replies	Views	Activity
What a reversed-phase purity number actually is Analytics › HPLC & UHPLC HPLC system suitability data table peak integration Solved The question in the title: What a reversed-phase purity number actually is I will give what I have already checked below so nobody repeats it. I would like to understand what this number means before I repeat…	+87	101	27k	4h
Reused chromatograms across lots: how to spot it Analytics › COA interpretation batch & lot numbers amino acid analysis documentation quality certificate of analysis On the subject in the title: Reused chromatograms across lots: how to spot it Working notes rather than a conclusion. A documentation question rather than an analytical one. I have a certificate in front of…	+53	60	9.5k	4h
When a network meta-analysis is defensible and when it is not Evidence › Meta-analyses effect size heterogeneity publication bias Solved When a network meta-analysis is defensible and when it is not I have a specific reason for asking rather than idle curiosity, and the context is below. Comparing SUSTAIN 6 ( N Engl J Med , 2016) with LEADER (…		2	27k	4h
How the vendor documentation pages are maintained, and by whom Sourcing › Vendor reports certificate of analysis Janoshik Analytical batch & lot numbers documentation quality Solved How the vendor documentation pages are maintained, and by whom I have a specific reason for asking rather than idle curiosity, and the context is below. I would like to talk about documentation quality as a…		2	6k	4h
Mobile reading experience on long topics Meta › Site feedback site feedback moderation guidelines Mobile reading experience on long topics Writing it up because I had to work it out twice and would rather nobody else did. Nominating something for promotion into the documentation commons. The topic in…		2	14k	4h
Named, unnamed and unspecified impurities as regulatory categories — the long version Analytics › Impurities & related substances HPLC data table forced degradation counter-ion content Wiki Named, unnamed and unspecified impurities as regulatory categories — the long version — setting out what I have, and where I think it stops being reliable. A documentation question rather than an analytical…	+112	120	7.6k	5h
Repeatability versus intermediate precision — what changed since Analytics › Method validation recovery precision & repeatability linearity system suitability Posting this under the heading it deserves: Repeatability versus intermediate precision — what changed since Everything below is what sits behind that. Working through the identity arithmetic and I would like…		4	21k	5h
Chain of custody for a sample you posted yourself Sourcing › Independent verification PeptideMeter third-party testing Janoshik Analytical blind sampling Chain of custody for a sample you posted yourself Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the answers here are usually better than…		2	7.3k	5h
Sleep quality changes during weight loss Wellbeing › Sleep heart rate obstructive sleep apnoea fatigue On the subject in the title: Sleep quality changes during weight loss Working notes rather than a conclusion. Asking about a population rather than about a person. The published trials in this class mostly…	+27	31	555	5h
What other technical communities get right that we do not Lounge › Off topic beginner friendly long read Wiki What other technical communities get right that we do not — that is the question, and I have not found it answered plainly anywhere I have looked. Lower-stakes topic, but the sourcing rule still applies if…	+2	6	23k	5h
About the Mass spectrometry category Analytics › Mass spectrometry LC-MS high-resolution MS mass error (ppm) Pinned Wiki LC-MS and high-resolution MS, charge states, mass accuracy in ppm, and what identity confirmation does and does not establish. This post is a community wiki: any member at trust level 3 or above can edit it,…	+5	9	19k	6h
What TRIUMPH is designed to answer, and why we should not pre-empt it Compounds › Retatrutide retatrutide effect size TRIUMPH programme preprint Solved What TRIUMPH is designed to answer, and why we should not pre-empt it I have a specific reason for asking rather than idle curiosity, and the context is below. I have seen SURPASS-4 ( Lancet , 2021) cited in…	+4	8	142	6h
Second pass at: Orforglipron as a non-peptide: what changes when the molecule is small Compounds › Oral incretins PIONEER programme orforglipron randomised trial SOUL trial Second pass at: Orforglipron as a non-peptide: what changes when the molecule is small Writing it up because I had to work it out twice and would rather nobody else did. Comparing SURPASS-4 ( Lancet , 2021)…		2	17k	6h
Sulfonylureas: the interaction most worth taking seriously Practice › Interactions needs a source metformin insulin Sulfonylureas: the interaction most worth taking seriously Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated, because I have seen how…	+4	8	38k	6h
[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Analytics › HPLC & UHPLC HPLC system suitability gradient method Detection wavelength and why 214 nm and 280 nm disagree — setting out what I have, and where I think it stops being reliable. Posting the method first, because I know what the first three replies will…	+69	76	920	6h
What I would want from a home test that does not exist yet Analytics › Home & field testing ELISA documentation quality LOD & LOQ Solved Pinned The question in the title: What I would want from a home test that does not exist yet I will give what I have already checked below so nobody repeats it. A documentation question rather than an analytical…	+46	50	8k	6h
A supplier who responds to a discrepancy with silence — what changed since Sourcing › Red flags mislabelling disputed documentation quality underdosing Wiki A supplier who responds to a discrepancy with silence — what changed since — setting out what I have, and where I think it stops being reliable. A logistics question, since the answers here are usually better…	+83	88	21k	6h
Revisiting: Drawing from a pen cartridge with a syringe: how the risk profile changes Devices › Pens & autoinjectors dead volume missed dose storage subcutaneous injection Revisiting: Drawing from a pen cartridge with a syringe: how the risk profile changes Writing it up because I had to work it out twice and would rather nobody else did. I have read the maintained page on this…		2	18k	6h
[2026 update] Correlation in a self-tracked dataset: what it can support Research Methods › Statistics number needed to treat effect size worked example heterogeneity Posting this under the heading it deserves: Correlation in a self-tracked dataset: what it can support Everything below is what sits behind that. I have seen SURMOUNT-4 ( JAMA , 2024) cited in support of a…		2	31k	6h
SURPASS-2 and the comparator dose question that will not go away — what changed since Compounds › Tirzepatide SURMOUNT programme tirzepatide effect size Posting this under the heading it deserves: SURPASS-2 and the comparator dose question that will not go away — what changed since Everything below is what sits behind that. Session topic: STEP 8 ( JAMA ,…	+2	6	5.5k	7h
Compounds this community declines to help with, and why — does this still hold? Compounds › Other compounds custom synthesis research use only mislabelling Compounds this community declines to help with, and why — does this still hold? — that is the question, and I have not found it answered plainly anywhere I have looked. I have seen SCALE ( N Engl J Med ,…	+3	7	26k	7h
Reconstituting a multi-strength kit without mixing yourself up — what changed since Practice › Reconstitution concentration maths syringe units bacteriostatic water On the subject in the title: Reconstituting a multi-strength kit without mixing yourself up — what changed since Working notes rather than a conclusion. Practical question with the units stated, because I…	+42	46	1k	7h
A site rotation scheme that is easy enough to actually follow — a second dataset Practice › Administration subcutaneous injection needle gauge & length injection site rotation missed dose A site rotation scheme that is easy enough to actually follow — a second dataset Writing it up because I had to work it out twice and would rather nobody else did. Practical question with the units stated,…	+6	10	1.2k	7h
Isotope patterns and why the monoisotopic peak is not the tallest — does this still hold? Analytics › Mass spectrometry charge states counter-ion content high-resolution MS mass error (ppm) Solved Isotope patterns and why the monoisotopic peak is not the tallest — does this still hold? — that is the question, and I have not found it answered plainly anywhere I have looked. Working through the identity…		2	4.6k	7h
Reading a home test result without over-claiming Analytics › Home & field testing ELISA documentation quality LOD & LOQ third-party testing Reading a home test result without over-claiming — setting out what I have, and where I think it stops being reliable. Working through the identity arithmetic and I would like it checked. retatrutide has a…	+124	137	19k	7h
Joined after a search result and stayed Lounge › Introductions beginner friendly onboarding Posting this under the heading it deserves: Joined after a search result and stayed Everything below is what sits behind that. Lower-stakes topic, but the sourcing rule still applies if anyone makes a claim.…	+5	9	26k	7h
Documenting a supplier's response to a discrepancy Sourcing › Vendor reports third-party testing documentation quality batch & lot numbers Solved On the subject in the title: Documenting a supplier's response to a discrepancy Working notes rather than a conclusion. Structured report rather than an opinion, following the format the maintainers asked…	+44	49	589	8h
Coming back to: Why our vendor pages link the storefront and mark it sponsored Sourcing › Vendor reports third-party testing batch & lot numbers certificate of analysis documentation quality Why our vendor pages link the storefront and mark it sponsored I have a specific reason for asking rather than idle curiosity, and the context is below. Structured report rather than an opinion, following the…		2	22k	8h
Revisiting: Body image changing more slowly than the body Wellbeing › Mental health disordered eating mood beginner friendly Solved Posting this under the heading it deserves: Revisiting: Body image changing more slowly than the body Everything below is what sits behind that. General question, not a request for advice about my own care —…	+5	9	28k	8h
The SOUL trial and oral semaglutide cardiovascular outcomes Compounds › Oral incretins orforglipron oral semaglutide SOUL trial PIONEER programme Posting this under the heading it deserves: The SOUL trial and oral semaglutide cardiovascular outcomes Everything below is what sits behind that. Session topic: SCALE ( N Engl J Med , 2015). Please read it…		2	7.1k	9h