Tags · Practice

freeze-thaw

What freezing does to a peptide solution.

31 topics 9 solved Group: Practice

31 topics · page 1 of 2

Topic	Participants	Replies	Views	Activity
What published stability data actually covers, and what it does not Practice › Storage & stability cloudy or discoloured solution freeze-thaw beyond-use date Solved Asking directly, because I could not find a straight answer: What published stability data actually covers, and what it does not A question about published stability data actually covers that I think has a…	+8	12	435	1d
Does a peptide degrade silently, with no visual change? Practice › Storage & stability beyond-use date cold chain temperature excursion freeze-thaw Solved Does a peptide degrade silently, with no visual change? I have a specific reason for asking rather than idle curiosity, and the context is below. What changes if the standard account of peptide is wrong? I…	+73	79	1.3k	1d
Coming back to: Light exposure: how much protection is proportionate? Practice › Storage & stability temperature excursion cold chain freeze-thaw cloudy or discoloured solution Asking directly, because I could not find a straight answer: Light exposure: how much protection is proportionate? Reading back through what has been written here about Light exposure, three questions come up…	+5	10	13k	2d
[2026 update] Does a peptide degrade silently, with no visual change? Practice › Storage & stability temperature excursion storage freeze-thaw cold chain Does a peptide degrade silently, with no visual change? — that is the question, and I have not found it answered plainly anywhere I have looked. I have read the maintained page on this and I still have a gap,…	+82	86	24k	15d
Second pass at: Temperature logging at home: what is worth the effort Practice › Storage & stability temperature excursion cloudy or discoloured solution freeze-thaw cold chain Posting this under the heading it deserves: Second pass at: Temperature logging at home: what is worth the effort Everything below is what sits behind that. Posting a small dataset on Temperature logging. It…	+4	8	29k	1mo
[2026 update] Storing lyophilised material long term: what governs the shelf life Practice › Storage & stability beyond-use date freeze-thaw cold chain cloudy or discoloured solution Storing lyophilised material long term: what governs the shelf life — setting out what I have, and where I think it stops being reliable. Two things I would like separated before anyone answers on Storing…	+122	133	35k	1mo
A reconstituted vial's beyond-use date and the reasoning behind common figures Practice › Storage & stability temperature excursion storage freeze-thaw Posting this under the heading it deserves: A reconstituted vial's beyond-use date and the reasoning behind common figures Everything below is what sits behind that. I have read the maintained page on this…	+125	129	45k	2mo
Light exposure: how much protection is proportionate? Practice › Storage & stability beyond-use date freeze-thaw cold chain cloudy or discoloured solution The question in the title: Light exposure: how much protection is proportionate? I will give what I have already checked below so nobody repeats it. Trying to establish the boundary conditions on light…		2	59	3mo
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Practice › Storage & stability beyond-use date freeze-thaw cloudy or discoloured solution storage Closed On the subject in the title: Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Working notes rather than a conclusion. The question about Adsorptive losses that I…	+77	87	58k	4mo
Storing lyophilised material long term: what governs the shelf life Practice › Storage & stability temperature excursion cold chain freeze-thaw On the subject in the title: Storing lyophilised material long term: what governs the shelf life Working notes rather than a conclusion. I have spent a fortnight trying to pin storing lyophilised material…	+83	90	1k	5mo
Storing in the door of the fridge is worse than you think Practice › Storage & stability cold chain beyond-use date storage freeze-thaw Solved Storing in the door of the fridge is worse than you think Writing it up because I had to work it out twice and would rather nobody else did. Asking about the failure mode rather than the procedure, because…		2	8.3k	5mo
Temperature loggers worth the money — the long version Devices › Cold chain storage freeze-thaw temperature excursion Closed On the subject in the title: Temperature loggers worth the money — the long version Working notes rather than a conclusion. A narrow question about Temperature loggers worth the money, deliberately narrow,…	+110	127	48k	6mo
What published stability data actually covers, and what it does not — what changed since Practice › Storage & stability freeze-thaw storage temperature excursion cloudy or discoloured solution Solved What published stability data actually covers, and what it does not — what changed since — that is the question, and I have not found it answered plainly anywhere I have looked. What changes if the standard…		3	43k	6mo
Airline travel with a temperature-sensitive injectable Devices › Cold chain freeze-thaw cold chain temperature excursion storage Posting this under the heading it deserves: Airline travel with a temperature-sensitive injectable Everything below is what sits behind that. Airline travel: setting out the arithmetic in full, because I have…	+19	23	4.9k	7mo
Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures Practice › Storage & stability beyond-use date cold chain temperature excursion freeze-thaw Solved Second pass at: A reconstituted vial's beyond-use date and the reasoning behind common figures Writing it up because I had to work it out twice and would rather nobody else did. Something changed and I would…	+4	8	20k	8mo
Freeze-thaw and why one cycle is not the same as five Practice › Storage & stability beyond-use date freeze-thaw cloudy or discoloured solution storage On the subject in the title: Freeze-thaw and why one cycle is not the same as five Working notes rather than a conclusion. Two things I would like separated before anyone answers on freeze-thaw, because they…	+21	25	41k	8mo
A parcel that arrived warm: a decision process, not a verdict Practice › Storage & stability cold chain beyond-use date storage freeze-thaw Solved A parcel that arrived warm: a decision process, not a verdict Writing it up because I had to work it out twice and would rather nobody else did. Asking about the failure mode rather than the procedure,…	+130	140	12k	8mo
Refrigerated versus room temperature: the trade-off stated plainly — what changed since Practice › Storage & stability temperature excursion freeze-thaw storage cloudy or discoloured solution Closed Posting this under the heading it deserves: Refrigerated versus room temperature: the trade-off stated plainly — what changed since Everything below is what sits behind that. What changes if the standard…		2	2.7k	9mo
Temperature loggers worth the money Devices › Cold chain cold chain storage freeze-thaw Temperature loggers worth the money — setting out what I have, and where I think it stops being reliable. Something about temperature loggers worth the money does not reconcile and I would like a second pair…	+46	50	8k	9mo
Power cut for eleven hours: how I assessed it afterwards Practice › Storage & stability beyond-use date freeze-thaw storage cloudy or discoloured solution Posting this under the heading it deserves: Power cut for eleven hours: how I assessed it afterwards Everything below is what sits behind that. The question about power cut for eleven hours that I actually…	+102	109	1.4k	9mo
Revisiting: Power cut for eleven hours: how I assessed it afterwards Practice › Storage & stability storage freeze-thaw beyond-use date cloudy or discoloured solution Revisiting: Power cut for eleven hours: how I assessed it afterwards — setting out what I have, and where I think it stops being reliable. A follow-up question about Power cut for eleven hours that I did not…		4	195	9mo
Coming back to: What published stability data actually covers, and what it does not Practice › Storage & stability cold chain freeze-thaw storage beyond-use date Solved Closed The question in the title: What published stability data actually covers, and what it does not I will give what I have already checked below so nobody repeats it. Reading back through what has been written…	+136	148	20k	10mo
Freeze-thaw and why one cycle is not the same as five — a second dataset Practice › Storage & stability storage beyond-use date freeze-thaw Freeze-thaw and why one cycle is not the same as five — a second dataset — setting out what I have, and where I think it stops being reliable. Posting a small dataset on Freeze-thaw. It is mine, it is…	+47	55	46k	10mo
Travel coolers and how long they really hold Devices › Cold chain temperature excursion storage freeze-thaw On the subject in the title: Travel coolers and how long they really hold Working notes rather than a conclusion. A narrow question about travel coolers, deliberately narrow, because the broad version has…	+78	84	14k	12mo
Domestic fridge temperature mapping: a cheap experiment — what changed since Devices › Cold chain cold chain storage freeze-thaw temperature excursion Domestic fridge temperature mapping: a cheap experiment — what changed since — setting out what I have, and where I think it stops being reliable. What changes if the standard account of Domestic fridge…	+145	155	46k	12mo
Domestic fridge temperature mapping: a cheap experiment Devices › Cold chain cold chain temperature excursion storage freeze-thaw Domestic fridge temperature mapping: a cheap experiment Writing it up because I had to work it out twice and would rather nobody else did. Collecting what is known about domestic fridge temperature mapping in…		2	182	14mo
Travel coolers and how long they really hold — the long version Devices › Cold chain storage freeze-thaw cold chain Solved Pinned Travel coolers and how long they really hold — the long version — setting out what I have, and where I think it stops being reliable. A narrow question about Travel coolers, deliberately narrow, because the…	+19	23	45k	14mo
Second pass at: Domestic fridge temperature mapping: a cheap experiment Devices › Cold chain temperature excursion cold chain freeze-thaw storage Solved Posting this under the heading it deserves: Second pass at: Domestic fridge temperature mapping: a cheap experiment Everything below is what sits behind that. Two things I would like separated before anyone…		2	30k	16mo
Transporting a vial for a weekend away Practice › Storage & stability temperature excursion freeze-thaw beyond-use date cloudy or discoloured solution Closed On the subject in the title: Transporting a vial for a weekend away Working notes rather than a conclusion. Transporting a vial, and specifically the version of it that the documentation does not cover. The…	+39	45	35k	21mo
Revisiting: A fridge failure and how I assessed the contents afterwards Devices › Cold chain freeze-thaw cold chain temperature excursion Posting this under the heading it deserves: Revisiting: A fridge failure and how I assessed the contents afterwards Everything below is what sits behind that. The question about fridge failure that I actually…		2	15k	22mo

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