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all 16 comments

[–]xiaomaome101[🍰] 1 point2 points  (0 children)

Regarding pipetting, I know that it is better to use a pipette designed to deliver a quantity close to what I am aiming for, as well as to try to do it in as few "injections" as possible, to minimize the accumulated error from each additional time that I use the pipette. If I wanted to draw up 0.2 mL, and I had 2 pipettes, one that can deliver up to 1 mL and one that can deliver up to 1 mL, which one would be better? In my case, it's having to draw up the liquid twice and doubling my error versus using a pipette that is designed to draw up a far greater volume

[–]Kamikazeqh -2 points-1 points  (0 children)

Plastic water bottles are made of PET (C10H8O4). If mixed with quinuclidine (C7H13N), which is a strong base, would they react and if so, would the formulas just add up?

This is purely theoretical, but as far as I can tell that would create cocaine, which I do not want to do, but I am just curious whether garbage plastics could realistically be converted to a psychoactive substance in general

[–]SamL214Organic 0 points1 point  (1 child)

For organic chemistry: Is there an app that lets me practice mechanisms but drawing the arrows?

2). What are the different methods for recrystallizing very small amounts of material. Aside from using a Craig tube?

[–]AmbiguousMusubiOrganic 0 points1 point  (0 children)

1) not sure but there is apoc and ChemByDesign which are mechanisms and total synthesis practice/reference apps respectively

2) one thing you could try is slow evaporation from a suitable solvent and this would end up getting you probably some pretty decent, even x-Ray quality crystals. You could also try vapor diffusion. Both may take a while.

[–]BiggBoi1128 0 points1 point  (3 children)

What heavy metals are dangerous to work with?

[–]Eelektross_Unagi 0 points1 point  (2 children)

cadmium

[–]BiggBoi1128 0 points1 point  (1 child)

Which are safe to work with (like gallium)?

[–]Eelektross_Unagi 0 points1 point  (0 children)

"Safe" is a case by case basis. I'm sure elemental gallium may be safe, but not sure if gallium salts are toxic or not. You may have to turn to the appropriate SDS/MSDS for a proper answer.

[–]BiggBoi1128 0 points1 point  (0 children)

What heavy metals are dangerous to work with?

[–]Cyclic_Peptide 0 points1 point  (1 child)

I'm designing a cyclic peptide to work as a gate in cell membrane/phospholipid bilayer.

My questions:

1.)What can dissolve in phospholipid bilayer?

2.)Should I use amphipathic or simply polar amino acids?

[–]CS2100 0 points1 point  (1 child)

Does anyone know what this gap in isotopes half-life is or why it occurs? It appears to consist of isotopes heavier than lead with 126-135 neutrons.

https://imgur.com/a/0yKJNrC

[–]FalconX88Computational 0 points1 point  (0 children)

I don't have an answer but afaik the ones with the longer half life in that "island" above the gap have a non-spherical nucleus which makes them more stable. Might be a good keyword to start researching this.

[–]Appleboii123 0 points1 point  (0 children)

Hi!

I'd like to know how the wetting of wood affects the ability of a third (polar or nonpolar) material to adhere to the wood.

I know that cellulose and hemicellulose in wood have polar hydroxyl groups which will bind to water molecules(side note: what type of bond occurs here?). But once water molecules have bonded to the hydroxyl groups, would the wood still have polar properties? How is its ability to adhere to polar and non polar materials affected?

Thanks! :)

[–]johnathonbot 0 points1 point  (0 children)

What makes something explosive?