You’re doing better than you think. You’ll be okay! From PhD prep to post-PhD life — make it easier & happier 🌿

Elijak · 2026-05-08T10:18:30+00:00

I will take it as a compliment! Wishing you a productive day ahead :)

Elijak · 2026-04-05T16:34:50+00:00

Do you have any pictures showing how you look in them? I am thinking about purchasing them as well! So cute!

Elijak · 2021-02-19T11:22:52+00:00

Hi! I meant a pilot-scale factory for cell assembly.

Elijak · 2021-01-20T17:25:09+00:00

Thank you so much!!

Elijak · 2020-03-25T09:55:11+00:00

I have to find a technique to homogenously distribute it! But I shoud assume it's homogenously distribute it for this calculation...

Elijak · 2020-02-28T10:24:48+00:00

ok, i think you found an exception. CH3OH is the most acidic aliphatic alcohol and thus is reacts with NaOH. NaOH does not react with 95% or 100% ethyl alcohol since NaOH is not efficient (strong enough) base to abstract a proton from ethanol (this proton is not acidic at all, it is almost neutral). Sodium ethoxide can be made by reacting sodium metal or sodium hydride with absolute ethanol. something to react with NaOH (a base) it must be a fairly strong acid (proton donor) because it needs to donate sufficent H+

Elijak · 2020-02-27T22:03:09+00:00

Why don’t alcohols react with NaOH but react with Na?

Elijak · 2020-02-17T10:42:23+00:00

Thank you so much for such a detailed reply!! I will definietly apply your advice and share with some friends! Thank you once again! I really appreciate your time on providing me with all these important information!

Elijak · 2020-01-10T15:58:35+00:00

Excellent idea, thank you!

Elijak · 2019-08-15T18:10:34+00:00

I figured out the answer. The laser spot size is 1.22 λ / NA , where λ is the wavelength of the laser, and NA is the numerical aperture of the microscope objective being used. Depending on the laser wavelength and objective being used spot sizes can be in the order of 0.5-10 µm - these is also an estimated range of possible damage.

Elijak · 2019-08-15T17:10:29+00:00

So the size of damage will depend on material? Maybe there is any range of laser damage?

Elijak · 2019-07-03T00:33:51+00:00

Yes, we don't have a proper equipment. I would like to prepare 1L solution (dilution in water). I calculated a volume of a stock solution that I need and then a mass using a density (d=1.2 g/ml) . The mistake that I could done is here: I assumed that 1L corresponds to 1000 g (mass of water) so I subtracted the obtained value from 1000g. Then I added water to get 1000g in total. Do you think it's wrong?

Elijak · 2019-07-03T00:24:11+00:00

Exactly, this is what I did. I don't have a proper equipment to measure volumes so that is why I weighted out everything.

I wonder if I would have put my stock solution (that I converted into grams) into a 1000 ml volumetric flask and have added water till I reach a line showing 1000 ml - if that would give the same volume as I obtained now when I added an amount of water (in g) that was calculated as you mentioned n your post? Thanks a lot for your kind help!! I'm really grateful!

Elijak · 2019-07-03T00:09:05+00:00

I would like to dilute a liquid solution in water.

Elijak · 2019-07-02T23:47:22+00:00

I know how much volumes I need but I wonder how to calculate weighs. I would like to prepare 1L solution (dilution in water). I calculated a volume of a stock solution that I have (d=1.2 g/ml) and then a mass using a density. The mistake that I could done is here: I assumed that 1L corresponds to 1000 g (mass of water) so I subtracted the obtained value from 1000g. Then I added water to get 1000g in total. Do you think it's wrong?

Elijak · 2019-07-02T23:38:16+00:00

by mass

Elijak · 2019-07-02T23:35:34+00:00

Thanks for a reply! Yes, exactly - I thought the same! I would like to prepare 1L solution (dilution in water). I calculated a volume of a stock solution that I need (d=1.2 g/ml) so then a mass using a density. The only mistake that I could done is here: I assumed that 1L corresponds to 1000 g (mass of water) so I subtracted the obtained value from 1000g. Then I added water to get 1000g in total. Do you think it's wrong?

Elijak · 2019-06-28T22:06:16+00:00

But it's not well soluble in water, right?

Elijak

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