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00:15
Hey @BerryHolmes
Hello @airhuff :)
@airhuff While you're here, at Mount Everest, what influences the melting of a substance, pressure or temperature?
@BerryHolmes , My first thought on that question was that pressure change was insignificant, but I haven't calculated it or anything. I wonder about the thermal conductivity between thinner air and the solid vs. at sea level too.
@BerryHolmes , I just saw all that serial DV stuff, I hope you're not too upset about it, just some idiot. It seems like there should be a way for the mod's to find who did that. I'd heard of it but that's the first time I've seen it happen to anyone...bummer.
Pressure change is quite small, 67.6 kPa.
hello
Yea, and the slope of the solidus (I hope I have that term right) on the phase diagram is pretty straight up.
Hi @heather :)
00:24
this paper I'm reading references "the stoichiometry of the reactants and products" as apparently, a number. what would this mean?
@airhuff Nah, but a while ago Michelle was telling us about how she was serial DV'ed as well; the script gave me back a few rep so no worries. And hi @heather.
hello =)
Sorry, I'm not sure what you are asking @heather.
I'm reading this paper and in section 2.1 it defines a reaction as "an element [of a list] $\rho = (\mathbf{r},\mathbf{p}) \in \mathbb{N}^{|Lambda}\times\mathbb{N}^{\Lambda}$ [where $\Lambda$ is a finite set of species (basically chemicals)], where $\mathbf{r}$ and $\mathbf{p}$ specify the stoichiometry of the reactants and products, respectively." It later gives an example
a reaction is written as "$\rho = A+B\rightarrow C$ (in this example, $\mathbf{r} = (1,1,0)$ and $\mathbf{p} = (0,0,1)$)."
I originally interpreted it as meaning that $\mathbf{r}$ and $\mathbf{p}$ were how many molecules of each species there were on each side (i.e., $\Lambda = \{A,B,C\}$, and on the left there's one molecule of A, one of B, and 0 of C, and so on)
but I'm not sure of this meaning.
This is perhaps the vector notation, is this relevant math.stackexchange.com/questions/624/…?
00:32
I also don't understand the reference to "the stoichiometry of the reactants and products".
@BerryHolmes hmm, that does seem to be relevant...maybe that is it.
I don't know, honestly, it's a bit of a confusing paper.
thank you, though. I'll see if I can use that.
@heather No problem :)
@heather , yea, I'm really not familiar with the concepts in that paper. It does look like r simply represents the reaction coefficients for each component of the reaction (0 if it only appears as a product) and the reverse for p. Not very helpful, I know, sorry.
@heather , btw, none of your markup renders in my browser...don't know if that's just my browser or what.
both of you have been helpful - you both seem to agree that that post seems to be related, and I had no idea before i came in here =)
@airhuff yeah, it requires the mathjax bookmark
Oh yea.
i didn't consider users in here might not have it - it's pretty common in the math and physics chatrooms - mathjax has a chemistry package so i thought it might be used in here.
er, chemistry set of commands.
00:39
There is a meta post somewhere that explains how to set it up, I just need to read through it.
19
A: Any chance of MathJax in chat?

Ilmari KaronenAs a workaround while this request is pending, there exist several client-side workarounds that can be used to enable LaTeX rendering in chat, including: ChatJax, a set of bookmarklets by robjohn to enable dynamic MathJax support in chat. Commonly used in the Mathematics chat room. An altern...

^this one?
@heather , so, did that python package in the answer to your question do what you needed? Just curious.
(it's an answer on the post)
@airhuff i think it will - I'm still experimenting
Yes, I think that's it, let me read through...
I have to take off guys, good chatting :)
partly because the algorithm given in the paper is so darn confusing, i'm having trouble getting even an idea of what I need to do to implement it - currently I'm having to learn about how to figure out algorithmic complexity because GOTOs are a no-no in Python, and I think I have a workaround, but I don't know if it still works in polynomial time
@airhuff have a good day =)
 
1 hour later…
02:03
Thanks @orthocresol for the tip. I will follow it.
I always wondered, what does "nuking" mean in StackExchange?
it simply means deleting the post
@PrittBalagopal also this is, not actually nuking, while nuclear bombs are known to perform magic tricks that renders things invisible :P, q+a on SE are soft-deleted (which means, they're just hidden).
03:14
I had a big doubt in metallurgy. Can someone help me?
My question is when do we do refining? For example, take silver. We obtain silver by Mc-Arthur Forest process(cyanide process). Is it now necessary to do electrolytic refining or is electrolytic refining done from direct ore in case we wanted to avoid cyanide process?
I mean my doubt is if electrolytic refining is done after taking out silver from its ore or directly from its ore?
 
3 hours later…
06:25
I think the reason why people were down-voting (including me) was the way you tried to get your point across. Your tone was a little inappropriate, your formatting was essentially non-existent, which distracted from the actual content of your answer. If I have to sort the noise out before I understand what you are saying, I don't find that helpful, hence I down-voted. Thanks to the efforts of @M.A.R. your answer got better. — Martin - マーチン ♦ 24 hours ago
It's not exactly 'efforts'
 
3 hours later…
09:39
Why is this question piling up downvotes?
-7
Q: nM or μM, which is more concentrated?

michele leeA study found that a particular herb fueled cancer at nM concentrations but actually inhibited cancer in μM concentrations. Which is the higher concentration, nM or μM?

 
3 hours later…
12:13
@BerryHolmes I suppose it wasn't really a question so much as a case of someone googling it. I was kind of bored so answered, but am surprised it hasn't yet been closed
12:38
@NotBaran Oh, but I think that this comes from a person with no background knowledge of chemistry, perhaps they don't even know what is meant by concentration or micro or nano prefixes, they just want to know which is greater so that they can comprehend the article they're reading
I doubt they are reading an article, it's more likely a HW question.
Re-read it and it now it seems highly likely to me that yes it is a homework ques.
 
3 hours later…
15:32
Are profile pictures copyrighted? Can I use someone's profile picture as my own?
Wait no, Jeff's profile picture is taken from a book: Steve McConnell's book Code Complete, which means I can use it right?
Only Chem.SE though, I don't want to be confusing people.
15:47
@BerryHolmes I don't think it's much of a copyright issue, but probably it's a good idea to ask them out of courtesy.
I'd feel kind of weirded out if somebody took my profile pic and used it as theirs (in my case, it might even be considered an attempt at moderator impersonation, but that will depend on context.)
2
@orthocresol Aren't there a few cute seal pictures for various peoples profiles @orthocresol...
@NotBaran Don't mention it
A sore topic? Or you just hate cute animals ? ;)
16:04
You scared ortho away ;(
My bad leaves
There was some drama lately
And certain user got temp. banned
:(
Oh no! My bad entirely. I don't hang around here enough, evidently. The drama passed me by entirely
@NotBaran Yeah... hence depends on context ;)
I'll stick to my colourful hexagons I think :P
16:13
Some noob once used my pic. but it wasn't for long...
well, this is unfair, I can only remember one indole synthesis off the top of my head...
closehammers
I'll send Jeff an email soon :)
@orthocresol Use the mighty mod powers and banish it from the face of the earth if needed.
I'm very partial towards anything that raises the level of the site in general.

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