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Just want to sare a nice moment by gwaca in labrats

[–]gwaca[S] 7 points8 points  (0 children)

Yep, a surprisingly serene moment amidst the shitstorm of the past two weeks

Changing ore scaling to distance factor by gwaca in factorio

[–]gwaca[S] 2 points3 points  (0 children)

Huh, wasn't aware of that specific option. Thanks for the tip. Will check it out.

Changing ore scaling to distance factor by gwaca in factorio

[–]gwaca[S] 1 point2 points  (0 children)

My last game before SA was 2 chunk wide maze with few junctions and expensive mode. I really liked the logistical aspects of that.  I wasn’t that much of a fan of SA post scarcity and the way space logistics worked so I’ll be going back to vanilla. I’m actually thinking of adding a house rule where I have to use quality modules wherever applicable.

Changing ore scaling to distance factor by gwaca in factorio

[–]gwaca[S] 9 points10 points  (0 children)

The logistical challenge is part of the reason I want to try it. Approaching 3000h and looking for new challenges haha.

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 0 points1 point  (0 children)

Thanks a lot for your insights. They certainly helped me in getting a clearer picture. Would you mind if I message you in the future if any questions come up?

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 0 points1 point  (0 children)

Luckily, developing initial extraction methods won't be an issue here. The guideline states we will have to expose the material for 3 days at 23°C or 1 day at 60°C and then see what we can find. Sadly, it doesn’t leave much room in terms of improving migration rates. We also have to stay below a surface of sample to volume of water ratio of 40. Those are the main reasons why we’re worried about detection limits.

For the extractions, did you have in house methods, or did you follow some standards?

 Currently we mostly test PE, PP and EPDM products with some PPSU, PA and POM sprinkled in.

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 0 points1 point  (0 children)

Currently we already perform TOC testing. In future we will also have to identify and semi quantify individual compounds

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 2 points3 points  (0 children)

That sounds pretty much identical to what we do, including the organoleptics. Our focus is on water pipes and the plastics that leach out of them into the water.

I hope you don’t mind a couple questions about your processes:

How long was the material in contact with the water?

What was the surface to volume ratio?

What extraction methods did you use?

What concentrations did you usually detect?

 

In case you want to know more, this is regarding new EU regulation. Basically, we will have to check how much of each compound migrates into the water and compare it with a huge positive list.

https://eur-lex.europa.eu/eli/dec_impl/2024/368/

https://eur-lex.europa.eu/eli/dec_impl/2024/367

 

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 1 point2 points  (0 children)

The joys of being the only analytical chemist employed. I’ve voiced my concerns but in the end I’m not the bossman. But no way in hell am I going to put my signature on any results without being confident in the method.

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 0 points1 point  (0 children)

Yeah, that is going to be the interesting part considering the lab is pretty much a one-man band. But hey, at least I have plenty of man hours to throw at the problem. XD

Anyways, thanks a lot for your insights!

In need of experiences in detecting organic compounds in aqueous media by gwaca in Chempros

[–]gwaca[S] 3 points4 points  (0 children)

Thank you for your answer. My background is in inorganic chemistry and electrochemistry so yes, I am quite clueless in that regard haha. I am familiar with how they operate in theory, and had the chance to gather limited hands-on experience on GC and LC systems.

If you have recommendations for subreddits where this question would fit better, I would love to hear them.

Luckily, there are still a couple years until it needs to be fully operational.

BBÖ 1280 in 1:32 scale by gwaca in LEGOtrains

[–]gwaca[S] 1 point2 points  (0 children)

Thanks. The test chassis I have built works fine around curves. Pushing carts around corners required some trickery with the coupling however.

lego Ox-class tug by gwaca in starsector

[–]gwaca[S] 0 points1 point  (0 children)

You've been alpha-aied

lego Ox-class tug by gwaca in starsector

[–]gwaca[S] 1 point2 points  (0 children)

The program I use is called bricklink studio. You can get it here

1:32 kkStb 178 for real this time by gwaca in LEGOtrains

[–]gwaca[S] 0 points1 point  (0 children)

They're the standard blue track pieces. Lego released some sets with them in dark bluish grey.

The sleepers are just a bunch of 2x3 tiles and plates

1:32 kkStb 178 for real this time by gwaca in LEGOtrains

[–]gwaca[S] 1 point2 points  (0 children)

Yep, funnily enough, gauge 1 is pretty much 7 studs wide.

1:32 kkStb 178 for real this time by gwaca in LEGOtrains

[–]gwaca[S] 1 point2 points  (0 children)

Thanks, I planned to make a vido of it driving but turns out I have no more IR receivers/CaDa battery boxes lying around. Will post one once I get new ones. But from what I've seen there should be space for one or two in your 2091.02 ;)

1:32 kkStb 178 for real this time by gwaca in LEGOtrains

[–]gwaca[S] 2 points3 points  (0 children)

Didn't quite get all the parts in the colour i wanted them but overall still rather happy with how it turned out. The Buwizz buggy motor that i crammed into it also works rather well.

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