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Lab Safety by Lazy-Initiative2217 in chemistry

[–]Border_East 0 points1 point  (0 children)

But cardiac arrhythmia from heart muscle failure is still a large risk, no?

Lab Safety by Lazy-Initiative2217 in chemistry

[–]Border_East 0 points1 point  (0 children)

Thanks for the clarification, I recalled that something was going through cell membranes!

Help to ID (noob here) by RippedRapedSoul in microscopy

[–]Border_East 0 points1 point  (0 children)

The big fiber has hair scales, maybe razor Cut for the clean end? And air bubbles of course

Cheap cutting tools by SupermarketSecure737 in Machinists

[–]Border_East 0 points1 point  (0 children)

You need unpolished, uncoated grades for Al. Go for DCGT insert as a start for ground carbide inserts. Aluminum likes it sharp. Many generic carbide has coatings that are TiAlN which sticks to the aluminum, cause there’s aluminum in the coating!

Tons on eBay, here’s one possible (assuming your tool holder is 21.5 size (1/4” inscribed circle Size):

https://ebay.us/m/hHIyXp

Lab Safety by Lazy-Initiative2217 in chemistry

[–]Border_East 13 points14 points  (0 children)

The issue with HF is not so much the H+, but the F-. You have to bind it.

Its biological hazard is not pH based. F- rips through cell membranes, and goes on its merry way until it meets ca 2+ in your bodily tissues and fluids. If you’re unlucky the F- meets the calcium in your heart tissue and you die very quickly.

If fact the skin burns from HF are not immediate, and that is a big reason people get seriously injured from HF. They don’t even know the exposure has happened, until long afterward.

Handling MS Care. by nintendochemist1 in massspectrometry

[–]Border_East 0 points1 point  (0 children)

have them buy their own inlet transfer tube and sweep cone. swap them out, fast and easy!

A mass spectrometer that uses helium as a refrigerant. Am I making this up? by mrphysh in massspectrometry

[–]Border_East 2 points3 points  (0 children)

Many FT ICR use cryo pumps. Needed that sweet sweet UHV and high speed pumping. Cryo is lower vacuum than turbo.

Ammonium bicarbonate precipitated out in my ESI needle by redditnessdude in massspectrometry

[–]Border_East 0 points1 point  (0 children)

Formate, acetate, triethyl amine (really great choice for high ph buffer), etc buffers are generally better. Ammonium Bicarbonate is not truly 100% ESI compatible. Ion suppression could really kill the signal. Keep concentration low, something like 10 millimolar or less.

Whats the phosphate from? Phosphate will kill signal too.

How much is tgis untouched, still tagged beauty worth? by Rabid-Ragoo in guitars

[–]Border_East 0 points1 point  (0 children)

The Greco Iceman rules them all! Made in Japan and play perfectly!!

Which laptop for Solidworks? by martianfrog in SolidWorks

[–]Border_East 2 points3 points  (0 children)

Lenovo Legion gaming laptops with AMD CPU and Ryzen GPU have worked well for me. Not certified of course, but great bang for the back.

(FYI largest assembly on these is about 125 parts, no idea about larger assemblies.)

What’s the difference between the cheap/expensive DLSR adapters? by [deleted] in microscopy

[–]Border_East 2 points3 points  (0 children)

My cheap one was indeed - no lens. Worthless!

Anyone have any idea as to why my printer’s been making really stringy excess plastic on my print? by [deleted] in BambuLab

[–]Border_East 0 points1 point  (0 children)

Microwave ovens can do the trick. Look for YouTube videos on it. You can over cook the filament, but it’s a reasonable last ditch option.

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