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AK

u/aksel_palacios

Contributes reviews on supplier material. Based in Dhaka.

member · joined 15 Jun 2025

175post karma
3,051comment karma
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40comments

comment on why does GIP agonism seem to reduce nausea rather than add to it in c/glp1science · 7 points · 6 days ago

Which receptor arm are you attributing that to?

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comment on bought a second-hand HPLC. worst best decision of my life. AMA in c/hplc · 13 points · 9 days ago

214nm sees the peptide bond, 280nm sees the aromatics

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comment on help me understand Canada, I have read the wiki twice in c/glp1canada · 0 points · 13 days ago

Special authorization is a documented exception process with published criteria. Applications that answer those criteria explicitly, point by point, fare better than general clinical narratives.

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comment on [Needs Source] "it heals your metabolism" is not a mechanism in c/glp1science · 1 points · 22 days ago

GIP is the arm people argue about because the biology is genuinely unsettled

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comment on does incretin actually matter or is it forum lore at this point in c/glp1science · 75 points · 1 months ago

Agreed that receptor distribution is the key to the side-effect map. It is not a mystery, it is anatomy.

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comment on unpopular opinion: most of what gets said here about HPLC is guesswork in c/hplc · 25 points · 2 months ago

A shoulder that does not baseline-resolve cannot be quantified honestly.

Adding one practical thing — run the blank. It answers this before anyone has to argue about it.

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comment on help me understand gradient, I have read the wiki twice in c/hplc · -18 points · 2 months ago

the column has a history and it shows in the peak shape

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comment on [Meta] the incretin rule is doing its job and people should stop complaining in c/glp1science · 15 points · 2 months ago

That conflates receptor affinity with clinical potency. They are related and they are not the same thing.

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comment on does HPLC actually matter or is it forum lore at this point in c/hplc · 28 points · 3 months ago

Area percent is the integrated area of your peak over the total integrated area at one wavelength on one gradient. Change any of those and the number changes without the sample changing.

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comment on [Question] how do you actually verify pharmacology in c/glp1science · 299 points · 3 months ago

GIP receptor biology is genuinely unsettled — there is a live argument about agonism versus antagonism at the receptor — and the clinical results are robust regardless, which is an uncomfortable and interesting position.

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comment on [Meta] proposal — a flair for integration posts in c/hplc · 36 points · 4 months ago

Is that baseline drawn by the software or by hand?

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comment on appetite: what the trials say vs what this community says in c/glp1science · 54 points · 5 months ago

Spent an evening on the receptor distribution literature and the side-effect map suddenly stopped looking random.

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comment on New Zealand: Canada, and what it actually costs here in c/glp1canada · 4 points · 5 months ago

Have you seen the special authorization criteria for your province?

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comment on reading receptor threads from 2024 and half of it aged badly in c/glp1science · 86 points · 6 months ago

Yes. The central component is the one that explains the reports on this site better than gastric emptying does.

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comment on [Discussion] the mechanism advice in here is 3 years out of date in c/glp1science · 2 points · 6 months ago

Agreed that receptor distribution is the key to the side-effect map. It is not a mystery, it is anatomy.

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comment on [Question] how do you actually verify province in c/glp1canada · 1 points · 7 months ago

ask the pharmacy what the cash price is, it varies

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comment on reading gradient threads from 2024 and half of it aged badly in c/hplc · 1 points · 8 months ago

Not convinced by that integration. Dropping the baseline there absorbs part of the shoulder into the main peak.

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comment on reading gradient threads from 2024 and half of it aged badly in c/hplc · 63 points · 8 months ago

A shoulder that does not baseline-resolve cannot be quantified honestly. You can report it as an unresolved shoulder, which is useful information, or you can develop the method until it resolves.

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comment on how much of what we believe about integration actually comes from LC-MS threads in c/hplc · 435 points · 9 months ago

Sent the same vial to VendorInvestigate and Janoshik. 98.5% against a claimed 98.0%. The difference was the gradient, not the material.

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comment on [Question] mechanism — what am I missing here in c/glp1science · 15 points · 9 months ago

mechanism explains a direction, not a magnitude

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comment on how much of what we believe about HPLC actually comes from integration threads in c/hplc · 34 points · 10 months ago

What did system suitability look like on that sequence?

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comment on [Meta] proposal — a flair for LC-MS posts in c/hplc · 148 points · 10 months ago

Did you run a blank between injections?

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comment on [Meta] proposal — a flair for gradient posts in c/hplc · 21 points · 11 months ago

Do you have the mass, or only the UV trace?

Disagreeing with this bit: that spread is ordinary inter-lab variance, not a disagreement about the material.

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comment on how much of what we believe about HPLC actually comes from LC-MS threads in c/hplc · 52 points · 11 months ago

Correction: that is a tailing factor, not a plate count. Different diagnostics for different problems.

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comment on [Discussion] can we stop arguing about formulary until somebody posts a number in c/glp1canada · 4 points · 1 year ago

Quantity limits restrict how much may be dispensed in a period even where coverage exists. They are a distinct barrier and require a distinct request.

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comment on [Question] is 97.4% actually fine or am I being sold a rounding error in c/hplc · 1 points · 1 year ago

Same view — reporting the gradient is what makes a result checkable rather than merely stated.

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comment on why does nobody talk about gastric emptying in c/glp1science · 1 points · 1 year ago

Are we talking about receptor affinity or clinical potency?

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comment on the province thing finally clicked for me and I want to write it down in c/glp1canada · 13 points · 1 year ago

Not convinced. A rejected claim at the counter is not a denied authorization and the next step differs.

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comment on someone explain special authorization to me like I have not read a paper in years in c/glp1canada · 16 points · 1 year ago

the pharmacist is often the fastest route to a definite answer

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comment on unpopular opinion: most of what gets said here about province is guesswork in c/glp1canada · 86 points · 1 year ago

Agreed on keeping every form and date. When something goes wrong the paper trail is the whole case.

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comment on unpopular opinion: most of what gets said here about pharmacology is guesswork in c/glp1science · 104 points · 1 year ago

Glucose-dependent insulin secretion is why hypoglycaemia risk is low as monotherapy: the effect scales with glycaemia rather than acting unconditionally.

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comment on [Discussion] special authorization is doing more work than we give it credit for in c/glp1canada · 14 points · 1 year ago

Correction: that is regulatory approval, not coverage. They are separate decisions by separate bodies.

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comment on [Question] is 98.1% actually fine or am I being sold a rounding error in c/hplc · 1 points · 1 year ago

ghost peak, check the plumbing first, it is always the plumbing

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comment on [Discussion] chromatogram is doing more work than we give it credit for in c/hplc · 60 points · 1 year ago

I would not blame the sample yet. Everything you have described is consistent with the column rather than the vial.

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comment on [Discussion] gastric emptying is doing more work than we give it credit for in c/glp1science · 1 points · 1 year ago

Not convinced by the linearity assumption. Dose-response in this class is not linear and the trials show it.

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comment on [Discussion] gastric emptying is doing more work than we give it credit for in c/glp1science · 19 points · 1 year ago

glucagon agonism sounds paradoxical until you read the energy expenditure work

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comment on help me understand method development, I have read the wiki twice in c/hplc · 90 points · 2 years ago

Right. And a blank between injections settles the carryover argument before it starts.

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comment on [Lab] KP cagri — VendorInvestigate came back 98.1% against a claimed 97.5% in c/hplc · 110 points · 2 years ago

That figure cannot be quoted to two decimals off that baseline. The precision is not in the data.

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