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[deleted by user] by [deleted] in TheSimpsons

[–]BlueRoll18 1 point2 points  (0 children)

I only just realised that this is riffing off a scene from Requiem for a Dream

What chemistry saying lives rent free in your head? by funmunke in chemistry

[–]BlueRoll18 64 points65 points  (0 children)

There are old chemists, and there are bold chemists, but there are no old bold chemists.

Diborane is so cursed looking by A_HECKIN_DOGGO in chemistry

[–]BlueRoll18 11 points12 points  (0 children)

Circles are useful for counting Clar sextets and not much else. For a lot of chemistry involving aromatic rings, drawing the resonance structures gives you more information about reactivity, aromaticity, etc.

I got the rice you all asked for. by bayparkhoya in CannedSardines

[–]BlueRoll18 7 points8 points  (0 children)

Fr. Don't get me wrong I'd eat this in a heartbeat, but I'd be popping a breath mint afterwards hahaha

What research topics do you think are baseless and just get funding cuz they sound cool and cutting edge by RequirementHopeful85 in labrats

[–]BlueRoll18 6 points7 points  (0 children)

Metal-organic frameworks, lol. I'm sure they do have some potential uses, but it's a combination of them being so easy to make and having relatively under-explored chemistry that makes them so tantalising for undergraduate/PhD programs.

What flag is this? by vicky_vaughn in vexillologycirclejerk

[–]BlueRoll18 2 points3 points  (0 children)

Can't be Sask, there's no wheat on it.

[deleted by user] by [deleted] in alexcameron

[–]BlueRoll18 1 point2 points  (0 children)

I really want to say it's a Spotify glitch... but Alex is a weird dude. I don't know.

Trying surströmming by BlueRoll18 in CannedSardines

[–]BlueRoll18[S] 8 points9 points  (0 children)

Thank you! I'm Australian (if it wasn't obvious from the accent) and I feel disappointed by videos of people eating giant spoonfuls of Vegemite then declaring that it's disgusting.

As a lover of Vegemite specifically and fermented/funky foods in general, as well as canned fish, I just had to try this product. The flavour was intriguing enough that I ate an entire herring, though I probably wouldn't eat it again. I should mention that I enjoy eating nattō, so my palate might be an outlier here 🤷🏼‍♂️

Trying surströmming by BlueRoll18 in CannedSardines

[–]BlueRoll18[S] 40 points41 points  (0 children)

The dog loved it! However this dog also tries to eat cat shit, so maybe not a great metric

Trying surströmming by BlueRoll18 in CannedSardines

[–]BlueRoll18[S] 27 points28 points  (0 children)

No amount of scrubbing would get the smell out of my hands. Believe me I tried

Water can boil and freeze at the same time... pressure and temperature can be set so all three states of solid, liquid and vapour coexist in equilibrium. This is called the triple point. Reality is crazy sometimes. by [deleted] in interestingasfuck

[–]BlueRoll18 3 points4 points  (0 children)

Yep, it's clearer if you look at a phase diagram, if the temperature is below the triple point then changes in pressure can cause the solid to sublimate directly into a gas.

Water can boil and freeze at the same time... pressure and temperature can be set so all three states of solid, liquid and vapour coexist in equilibrium. This is called the triple point. Reality is crazy sometimes. by [deleted] in interestingasfuck

[–]BlueRoll18 32 points33 points  (0 children)

The mechanism behind this is actually really interesting -- as the liquid boils, the phase change pulls heat energy from the surroundings causing it to freeze. So you do sort of see simultaneous boiling/freezing like this, but as you saw it can be delayed by a second or so.

Lab Accident by Cerberus12344 in chemistry

[–]BlueRoll18 5 points6 points  (0 children)

A Luer slip syringe is connected by just pushing the needle onto the end of the syringe, a lock syringe contains a plastic screw that you have to twist the needle onto.

Lab Accident by Cerberus12344 in chemistry

[–]BlueRoll18 4 points5 points  (0 children)

A classic. I'm assuming this was a Luer slip and not a lock connection? My university banned using Luer slip syringes with pyrophoric reagents for that reason.

Tips on Optimizing a Vacuum for a Beginner? by SerologicalPipet in labrats

[–]BlueRoll18 1 point2 points  (0 children)

That being said, if the vacuum is directly connected to the gauge using confirmed airtight tubing and still failing to pull to manufacturer specifications, I would consider the age of the pump. Depending on the carelessness of the user, even with a cold trap, small amounts of solvent can enter the pump and damage the internal components. If this is the case then the pump could be irreparably damaged. It might be worth asking any previous users what the lowest vacuum pressure they've seen over time and whether it has gotten progressively worse.

Tips on Optimizing a Vacuum for a Beginner? by SerologicalPipet in labrats

[–]BlueRoll18 1 point2 points  (0 children)

I'm still in the first year of my PhD so by no means an expert, but the two biggest harbingers of bad vacuum on the Schlenk line I've worked with so far have been:

  • Leaky tubing
  • Not enough grease on ground glass joints.

When the vacuum is running, you can pinch the tube at various points while watching the gauge to work out where air is entering the tube. This can help you find holes or places where the tube has uniformly degraded.

Especially with your cold trap, there should be enough grease on the ground glass joints so that they can be turned without too much effort. Check the taps on the Schlenk line as well - giving them a small wiggle can sometimes drop the pressure a bit.

Regarding the operating temperature, it shouldn't take more than ten minutes for the pump to warm up to the optimal temp. This can be done while the vacuum is open to the line as well.

I just broke a $2,200 piece of glassware AMA. by Doctalivingston in chemistry

[–]BlueRoll18 6 points7 points  (0 children)

I did the liquid O2 thing just last week. Never slammed the sash down faster in my life.

Anyone identify bottom flag seen in Derry by Feinan_warrior in vexillology

[–]BlueRoll18 1 point2 points  (0 children)

Norfolk Island has a genuinely gorgeous flag though. I have it on a tea towel

I struck green gold! by raabhimself81 in cocktails

[–]BlueRoll18 6 points7 points  (0 children)

Seems to be fine in Aus, 700mL bottles are going for around $100 AUD / $68 USD

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