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reading area percent threads from 2024 and half of it aged badly
reading area percent threads from 2024 and half of it aged badly. I have gone back and forth on this for months. UV at 214nm sees the peptide bond and picks up almost…
u/katrin_girard
Contributes reviews on supplier material. Based in Kolkata.
member · joined 14 May 2025
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Overview — page 2 of 2
comment on genuine question about sequence that I am slightly embarrassed to ask in c/bpc157 · 2 points · 1 year ago
stability in solution is the practical question nobody asks
comment on [Question] how do you actually verify pentadecapeptide in c/bpc157 · 118 points · 1 year ago
Paid for identity confirmation rather than just purity for the first time here. Worth it, and it is not the default on most certificates.
comment on reading BPC-157 threads from 2024 and half of it aged badly in c/bpc157 · 81 points · 1 year ago
Paid for identity confirmation rather than just purity for the first time here. Worth it, and it is not the default on most certificates.
comment on [Meta] the regulatory rule is doing its job and people should stop complaining in c/bpc157 · 56 points · 2 years ago
Asked WWB for the theoretical mass alongside the certificate and they sent it without asking why.
comment on how much of what we believe about thymosin actually comes from secretagogue threads in c/researchpeptides · 625 points · 2 years ago
Research-use-only material is not approved for human use. In this catalogue that covers essentially everything, which is why the board discusses material and analytics rather than outcomes.
comment on handling — 9 things I got wrong before I got it right in c/researchpeptides · 9 points · 2 years ago
the same name covers several different molecules in this space
comment on handling — 9 things I got wrong before I got it right in c/researchpeptides · 92 points · 2 years ago
ask which lines are actually stocked rather than made to order
comment on [Discussion] related substances are doing more work than we give it credit for in c/coa · 0 points · 2 years ago
the related substances line is where the story is
comment on [Discussion] related substances are doing more work than we give it credit for in c/coa · 271 points · 2 years ago
HPLC-UV and LC-MS answer different questions
comment on [Vendor] SSA vs TFC on the same compound, same month — both cleared 97.5% in c/coa · 38 points · 2 years ago
Is water content on the document? It changes your concentration arithmetic.
comment on reading tendon threads from 2024 and half of it aged badly in c/bpc157 · 24 points · 2 years ago
Short peptides in solution are subject to hydrolysis and, depending on sequence, oxidation. Storage state and time in solution are practical variables that this board almost never discusses.
comment on reading area percent threads from 2024 and half of it aged badly in c/coa · 123 points · 2 years ago
area% is not mass%, and the difference is the whole game
comment on reading area percent threads from 2024 and half of it aged badly in c/coa · 634 points · 2 years ago
Does the lot on the vial match the lot on the page?
comment on reading area percent threads from 2024 and half of it aged badly in c/coa · -12 points · 2 years ago
Not quite.
Disagree on this specific point. Two honest labs can resolve that impurity differently and report different numbers.