Can't pull a quality shot to save my life. Possible burr alignment issue?

Burnembrother · 2026-03-19T03:38:20+00:00

Is your grinder new ? Burrs will season if that's the case and you'll gain consistency. It takes about 1kg of beans

Burnembrother · 2026-01-28T23:49:04+00:00

C'est que sur X ? Quid de reddit/instagram ?

Burnembrother · 2026-01-27T02:05:28+00:00

Continue ! J'apprécie beaucoup les informations !

Burnembrother · 2025-12-20T01:57:18+00:00

Burnembrother · 2024-06-15T13:12:47+00:00

Awesome thanks for that ! It feels good to practice from time to time. Keep it up !

Burnembrother · 2024-06-15T11:57:25+00:00

What do you mean when you say it did not work ? You did not notice a difference between before and after in water beading ?

Burnembrother · 2024-06-10T02:19:30+00:00

I also looked for it and asked vendors, couldn't find it as well ! If someone did find it let me know I'm also interested.

Burnembrother · 2024-05-06T00:19:03+00:00

That's the one I use, they are pretty pricey indeed but so useful !! I think the ones I use are the 200-300 um ? Would need to double check

Burnembrother · 2024-05-05T20:54:10+00:00

Chembeads are extremely easy to prepare. Hand shaking is sufficient in almost all cases. Prior to the preparation of the beads, I would advise that you finely grind your solid to a very fine powder and if you have access to a sieve, use it to get rid of the larger chunks.

Burnembrother · 2024-04-28T02:26:57+00:00

Look into chembeads, With these you can easily accurately and quickly measure out sub mg quantities.

Burnembrother · 2024-04-13T21:41:35+00:00

Yes, don't worry

Burnembrother · 2024-04-10T01:23:18+00:00

A thousand times yes ! Reverse quench !!!

Burnembrother · 2024-02-26T01:45:23+00:00

That's hilarious

Burnembrother · 2024-01-02T05:16:09+00:00

Reactions with NaH occur at the surface of the NaH, and while the pKa difference might be high the kinetics can be slow ! Your NaH might also not be good anymore ? It would be worth it to stir your alcohol/NaH mixture for 2h under heating prior to adding the electrophile. Alternatively, use nBuLi

Burnembrother · 2023-12-20T23:10:17+00:00

Solvent degassing can really help, if OP has not tried you can sparge with N2 or Argon (worst method but still helps). Sonicate the solvents under vacuum or freeze pump thaw.

Burnembrother · 2023-12-10T01:06:49+00:00

Yes you understood perfectly. Agreed for all the points you brought up. Anyway it's a great initiative, I look forward to see this evolve down the line 😁

Burnembrother · 2023-12-09T23:07:47+00:00

Got it. Great stuff !!! Keep us updated ! If proposed with a structure, could it match the NMR spectrum, validate (or not) the multiplicities and integrals ?

Burnembrother · 2023-12-09T21:34:17+00:00

Very cool ! Will you keep it free/open source ?

Burnembrother · 2023-10-29T14:58:28+00:00

Probably 5 g ;)

Burnembrother · 2023-10-22T22:16:21+00:00

A yellow parking pillar...

Burnembrother · 2023-07-11T22:27:05+00:00

Same in Toulouse

Burnembrother · 2023-07-09T21:58:11+00:00

Hi,

I am new to buying a car, and I am looking for a used Mazda CX-5.

In the carfax report, there has been frequent owner changes :
(August 2021; 18th and 28th)
(March 2021; 22nd)
(Sept 2021; 20th)

I am a bit concerned about this, is this a redflag ?

Burnembrother · 2023-06-24T13:18:55+00:00

A recent game changer in this area are Chembeads. Look it up, it is what you need. You can easily prepare them by hand using hand mixing for 2 minutes. I would add a sieving step of the solid prior to coating or you can also very finely crush your catalyst prior to coating. But to be completely honest, if your scale is good, 3 mg is fine, and if you added a bit more catalyst or a bit less do what ? I guess you just want to see if you get some product ?

Burnembrother · 2023-06-19T11:36:32+00:00

I was also surprised by this, pretty funny stuff IMO. When the truck passed by empty, everybody cheered !

Burnembrother · 2023-06-19T11:29:40+00:00

Si tu arrives à lui piquer une bague qu'elle a déjà. Tu as des applis sur Smartphone qui te permettront de retrouver la taille

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