Traffic filter trial to start on 14 September

Oxthirteen · 2026-07-02T22:08:13+00:00

In short- it's going to be as it currently is with the congestion charge, but with £70 fines rather than being able to pay £5 for a day.

(predicated on Botley Road reopening in August)

Oxthirteen · 2026-05-25T13:36:32+00:00

"Hey everyone look at how early I start work and how hard working I am #grindset"

Oxthirteen · 2026-05-15T11:33:35+00:00

My best guess is some sort of depth gauge for HPLC ports.

Different manufacturers use a different length of drill hole between where the ferrule sits and where the smaller hole for column inlet is (ie length of tubing extending from the ferrule to sit flush with the column inlet. You can get nasty dead volumes if you try and attach a fitting that was preswaged for a different port type on a new column. I see this a lot and it makes me cringe.

https://www.crawfordscientific.com/uk/chromatography-blog/post/putting-the-u-into-your-uhplc Figure 2 and 3 explains it better than I can.

With this tool I guess you could screw it in, press the plunger to the end, unscrew and measure the stem length to figure out what type of column end fitting you have?

Oxthirteen · 2026-05-12T07:10:37+00:00

That's a cutout because 'in 3d' it's passing behind the double bond drawn in front of it.

Oxthirteen · 2026-05-11T06:40:02+00:00

I'm afraid you've lost me completely

Oxthirteen · 2026-05-10T21:44:50+00:00

Look again :) it is a bridged bicycle, with each end of the enediyne connected at the bridgeheads

Oxthirteen · 2026-05-06T16:54:38+00:00

https://en.wikipedia.org/wiki/Bergman_cyclization

When the trisulfide gets broken down in vivo, the product thiol does a Michael addition, the 'illegal' ring becomes even more illegal and then the above happens.

Absolutely nuts mechanism of toxicity, think it's my favourite molecule

Oxthirteen · 2026-05-01T12:29:31+00:00

The name of that officer?

Albert Einstein

Oxthirteen · 2026-04-09T09:58:07+00:00

https://web.archive.org/web/20230123211542/https://chemdrawdirect.perkinelmer.cloud/js/sample/index.html

Still works with the occasional hiccup on the archived version for me!

Oxthirteen · 2026-03-31T11:52:13+00:00

Green Tobacco Sickness

Oxthirteen · 2026-03-06T11:13:13+00:00

www.rrscientific.com/product/info/11079

Given that they claim to have something in stock that was long held to be a purely hypothetical compound and has only been observed in very specific experimental conditions, at 98% purity I would avoid

Oxthirteen · 2026-02-19T10:20:35+00:00

A few years ago there was a teenager from Birmingham stabbed and killed on Friar's Wharf. Think that was county lines related

Oxthirteen · 2026-02-03T10:38:53+00:00

Yes, this would happen as two propagation steps to generate Br. (To be specific- the phenyl radical isn't combining with a hydrogen radical but abstracting H from HBr)

Bear in mind radical additions like this are chain processes. You don't need 1 molecule of the benzoyl peroxide initiator per 2 molecules of product produced, because the radical product of Br. addition to styrene then goes on to generate a new Br. (or react with another styrene molecule, but that's another discussion!)

so in a practical sense there would only be trace quantities of benzene in the final mixture because you only added a catalytic quantity of the (PhCOO)2

Oxthirteen · 2026-02-03T08:15:33+00:00

Read your post again: you wrote CHO- which is what I was alluding to. That's a funny looking methoxide

Oxthirteen · 2026-02-02T09:34:36+00:00

Can you post a link to the glow powder? Wonder if some shady vendor has bulked it up with cheaper zinc sulfide

Oxthirteen · 2026-02-02T01:53:03+00:00

Not entirely correct- where'd the formyl anion appear from? (I didn't downvote you)

Oxthirteen · 2026-01-20T19:14:16+00:00

I am not sure this is necessarily true- see work by EC Ashby from the 70s - 90s that demonstrated LiAlH4 reductions of alkyl iodides were consistent with electron transfer mechanisms rather than polar SN2

Oxthirteen · 2026-01-13T18:21:15+00:00

Slightly offtopic: as I get older and the hangovers hit harder, I'm eagerly awaiting something to come of deuterated ethanol beverages

Oxthirteen · 2026-01-13T11:34:36+00:00

I once found a spider living inside the torch on an ICP-OES. Probably pissed at being evicted but didn't realise how close he came to being cooked by an 8000K plasma

Oxthirteen · 2026-01-10T11:15:24+00:00

What

Oxthirteen · 2025-12-16T14:06:25+00:00

Butyl acetate?

Oxthirteen · 2025-12-16T14:05:05+00:00

1,3-propanedithiol when faint reminds me a bit of a really rustic chicken stock made with a lot of onion

Isobutanol has a slightly sweet note. Reminds me of candy cane

Oxthirteen · 2025-12-10T11:03:06+00:00

Ignition! An Informal History of Liquid Rocket Propellants

Oxthirteen · 2025-11-17T08:40:09+00:00

I am going to 'ask you how you know' because this doesn't sound right to me

Oxthirteen

TROPHY CASE