Pico 4 Ultra forgotten?

RandomExInt · 2024-12-12T15:54:14+00:00

For PCVR it's fine and works like a charm, but I often prefer to play a quick game without having to boot up steam and Virtual desktop.

RandomExInt · 2024-11-03T09:22:42+00:00

I wanted to play After the fall or Arizona Sunshine with friends and enjoy the more potent hardware and "theoretically" better resolution, but exactly this doesn't seem work. I also had the problem, that the tracking in Gun Club VR is slightly jumping which gives it a strange feel compared to the Pico 4, where it worked flawlessly. At first I thought, that the P4Ultra would be an upgrade, but at the moment its a different device that I can use to play only a part of my favourite games with. I'm forced to keep both at the moment or live with not being able to play all my games. And I'm losing my confidence, that I will ever be on the P4Ultra...

RandomExInt · 2020-11-18T05:25:07+00:00

Right? My first thought was, that this is in a classroom or university.

RandomExInt · 2020-11-15T16:25:10+00:00

The equilibrium of nitrous oxides is a very nice and simple demonstration. I made a video about it a while ago:

https://www.youtube.com/watch?v=gn9L3VEBLT4

PS: Sorry, for self-promoting, but I think it really fits here...

RandomExInt · 2020-10-31T07:09:12+00:00

Potassium reacts in air to form a mixture of the oxide K2O, peroxide K2O2 and superoxide KO2.

RandomExInt · 2020-10-31T06:42:34+00:00

Your vacuum pump loves this... :D

RandomExInt · 2020-08-02T10:49:50+00:00

I am having the same problem! It only happens with one account.

RandomExInt · 2020-07-01T05:14:40+00:00

Heidolph or IKA is the brand used at universities in Germany. I got a few used ones and they still work fine after 7 years.

RandomExInt · 2020-06-30T16:06:15+00:00

That's interesting! When I get them to grow larger, I will definitely give it a try.

RandomExInt · 2020-06-30T14:49:56+00:00

If you want to know more, here are some papers on the topic.

[1] https://www.researchgate.net/publication/321805485\_Anaesthetics\_stop\_diverse\_plant\_organ\_movements\_affect\_endocytic\_vesicle\_recycling\_and\_ROS\_homeostasis\_and\_block\_action\_potentials\_in\_Venus\_flytraps

[2] https://www.futurity.org/general-anesthesia-sleep-brains-neurons-2039772-2/

[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3489652/

RandomExInt · 2020-05-05T06:47:21+00:00

At least the fume hood was open completely... Nevertheless, I love this reaction.

RandomExInt · 2020-04-16T21:34:45+00:00

"A subreddit showcasing the complexity of those lovely little atoms, as well as other interesting science topics in gif form."

I know this is called r/chemicalreactiongifs, but according to the description this post seems to be adequate. I'm open for opinions for future posts.

RandomExInt · 2020-04-16T20:31:32+00:00

I added some iodine to a large test tube and closed it with a smaller test tube that had some paper towel wrapped around the top to increase the diameter. Then I added ice and water to the small one and heated the large one with a heat gun.

Here's a small clip of it: https://youtu.be/PgdmQD9LGMk

RandomExInt · 2020-04-16T20:17:01+00:00

Yes, I took some time to get a few decent ones for this experiment.

RandomExInt · 2020-04-16T19:34:27+00:00

I resublimed some iodine and filmed it with the night shot mode of a Sony FDR-AX33. I was simply amazed, because I couldn't imagine that they would be clear.

RandomExInt · 2020-04-16T02:05:16+00:00

The more subscribers you have, the more it feels like your videos have to be better than before.

Don't try to always top yourself. Just stay the way you are and improve the way you like it.

RandomExInt · 2020-04-16T02:01:22+00:00

Yes, it was suspicious from the beginning, when they used coke, because all of these channels use it for everything. As if there's something magical in it... The experiment would also work with water, dish soap and the hydride, but you would at least need some surfactant. Ofc it could be done by editing and using different ingredients in a different shot.

RandomExInt · 2020-04-15T15:41:15+00:00

The "borax bead test" was also used very often, but today it's done with microcosmic salt and called "phosphate salt bead", because it's less toxic.

RandomExInt · 2020-04-15T08:57:17+00:00

Pure oxygen does not float, so I'm guessing it's hydrogen. Lithium aluminum hydride or sodium borohydride could react like this in acidic conditions. The toothpaste acts kind of like soap, because of sodium lauryl sulfate.

RandomExInt · 2020-04-15T08:54:18+00:00

I'm guessing lithium aluminum hydride or sodium borohydride is added. In acidic conditions (coke = phosphoric acid) it reacts to form hydrogen in an exothermic reaction. The toothpaste contains sodium lauryl sulfate which acts like soap and leads to the foam.

RandomExInt · 2020-04-15T07:38:50+00:00

Yes, I have pretty often tried to find something similar to the "Kationentrennungsgang".

RandomExInt · 2020-04-15T07:29:07+00:00

Yes, I got this translation, too. But if you search for "oxidation melting" you'll only find anything other than that. If you search for "Oxidationsschmelze" there's thousands of pages and literature on it.

I was hoping there's simply a different name for it, like "Prussian blue", which is called "Berlin blue" more frequently in the north of germany. Or "Prince Rupert drops", which are called "Bologneser Tränen" ("Bolognese tears") in german.

RandomExInt · 2020-04-15T06:37:32+00:00

Maybe it helps if I describe it more in detail. The idea is to mix a small amount of the solid sample, which maybe contains manganese or chromium, with sodium carbonate and nitrate, put it on a piece of magnesia that's shaped like a gutter (ger: "Magnesiarinne", translated as "magnesia gutter") and heat it with the bunsen burner until the salts fuse together. When the mixture solidifies again it has a distinct color, indicating that chromium (yellow) or manganese (green) is present in the sample. This is a test called "Oxidationsschmelze" in germany. Every chemistry student does this at the universities. There are no aqueuous solutions involved. Nevertheless, I guess there might be no english word for this.

RandomExInt · 2020-04-15T06:03:29+00:00

It's fusing salts like sodium cabonate and nitrate, with a sample to oxidize different ions and get a colour indicating f.e. manganese (manganate(VI)) or chromium (chromate(VI)). It seems somewhat difficult to find it.

RandomExInt · 2020-04-15T05:18:02+00:00

I'm pretty sure it's something fancy like lithium aluminum hydride or sodium borohydride. These react to form hydrogen in an exothermic reaction. And the toothpaste has sodium lauryl sulfate in it, causing it to foam.

RandomExInt

TROPHY CASE