The Periodic Table

9-BBN

00:30

iflscience.com/editors-blog/…

Good luck for people there

CowperKettle

05:01

> Acid-base profile
Basif isoforms: 21,21 ÷ 39,82

What could this mean?

I wonder what the ÷ sign could mean here

Martin - マーチン

@Rubisco What's proforma?

user116211

05:14

@Martin-マーチン I thought it's a Latin phrase.

Aaron Abraham

11:47

Just came across the BET Equation for adsorption. Wikipedia says the quantity 'v' refers to the 'quantity of gas adsorbed', but it doesn't specify the units 'v' adopts......would anyone happen to know ?

Is it in moles, or grams or volume or what?

(Currently this user, out of sheer desperation, seeing no help forthcoming, is attempting to answer his own question by the use of dimensional analysis)

Loong

@AaronAbraham In the original publication, $v$ and $v_m$ are volumes.

Aaron Abraham

12:08

Herr @Loong would you happen to know under what conditions?

(the volume's measured)

Loong

@AaronAbraham Can you get this file: sci-hub.cc/10.1021/ja01269a023 ?

Aaron Abraham

I tried to figure out what v was through dimensional analysis, but that wasn't any great help...

Okay...I'll try...

Russisch?

@Loong, darn, you're right they're volumes ... but even the article didn't seem to mention the conditions under which the volume's measured...

Danke für den artikel anyways....

(Unrelated comment: @Martin-マーチン I've been wanting to ask you this for a while now; where did you learn German from? (I wanna learn too, pretty pweeze)

Loong

@AaronAbraham If you need the practical measurement conditions, you should probably find a standard procedure such as iso.org/iso/catalogue_detail.htm?csnumber=44941

cough jinaipu.com/UpFile/20130522103632.pdf cough

(and use Acrobat to remove the stupid blue logo)

Aaron Abraham

@Loong Either you know where to find anything and everything, or I'm not searching hard enough.....

Here! Take my admiration!

Oooh page eight and nine are good...thanks!

Oh wait...ran into an issue

@Loong Do you happen to know if classification of graphs on page nine (9/30) of that chinesisch PDF are standard?

Because my book classifies the graphs as I, II, IIA, III, IV und V...

(The PDF replaces IIA with VI)

Loong

12:41

@AaronAbraham That Chinese pdf is a pirate copy of an ISO standard; so, yes, it's standard.

3

However, the classification is based on IUPAC recommendations: media.iupac.org/publications/pac/1985/pdf/5704x0603.pdf

(see page 612)

You might also want to check this: media.iupac.org/publications/pac/1994/pdf/6608x1739.pdf

pH13 - Yet another Philipp

13:03

@AaronAbraham it is the first

Martin - マーチン

13:16

The best way to learn German is being born by German parents, growing up in Germany, and even then it is quite hard.

@AaronAbraham ^^ it's true for me ;)

ping ping ping ;)

liberally adapted from goodreads.com/quotes/…

Aaron Abraham

13:53

@Martin-マーチン Wait. I thought you were Japanisch?

Martin - マーチン

Nope, I just live here

Aaron Abraham

Damn it...(my master plan goes down the drain)

Unrelated comment: Is that a Feldmütze you're wearing (profile pic.) ?

Aaron Abraham

14:37

0

Q: What's with the weird definition for the Calorie?

I came across this definition for the calorie, which I found...strange: "The (15°) calorie is the heat required to raise the temperature of one gram of water from 14.5°C to 15.5°C." Subsequent searches online revealed that this was (one of) the standard definitions for the Calorie. Now two iss...

9-BBN

Do you know the definition of a candela ?

Why do you ask for a definition ?

Aaron Abraham

Why bring up the candela now?

Rubisco

@Martin-マーチン Auto-review comments script from StackApps.

Reducing long names to one word is not my forte.

9-BBN

Because the definition is a definition nothing more nothing less. And the definition of a candela is weird too lol

Martin - マーチン

is this a new app?

Rubisco

14:42

@Martin-マーチン O.O The auto-comments thing.

Martin - マーチン

ok... i thought i missed sth

Rubisco

The one that has set comments and you just click buttons and insert them under the questions

Aaron Abraham

But there must be some rationale behind an internationally accepted definition...

Rubisco

@Martin-マーチン Pssht nah

Aaron Abraham

@Rubisco Pfft yeah...

Rubisco

14:43

Woohoo 8 candidates

I hope we have a primary

Three candidates left to a primary

Darn it. @Loong is saying nice things to the candidates

That guy will never learn . . .

Although he's being Germanly creative with it.

I can't compete and say some nice things he hasn't.

9-BBN

@AaronAbraham the measure of what a calorie is depends on the temperature and the pressure

Aaron Abraham

@Rubisco The last time I checked, enzymes don't learn either...nor do they type for that matter ;)

Rubisco

You're simply wrong.

Loong

@Rubisco Hm, each time I did that, a new cadidate appeared.

Rubisco

@Loong Then do it for the new one too. Well, I guess this strategy works too . . . You're earning yourself a bunch of votes prolly

Dammit, I feel so behind the tracks. I prolly won't be elected.

Aaron Abraham

14:50

Enzymes don't stand for elections either ;)

(Don't worry, you'll get my vote all the same)

=*_*=

Rubisco

@AaronAbraham What's this, a grizzly bear?

Aaron Abraham

-_-

Rubisco

-_-

Aaron Abraham

O.o

(P.S- I learnt the grizzly bear thing from Jan ^_^)

@Rubisco Iranian? O.o

Rubisco

Oh, she didn't do it with equal signs. It was some kinda . . . Hmm, demonic.

@AaronAbraham Yep. Now you know that generally, Iranians are cooler than Germans.

You learn something new everyday!

Aaron Abraham

14:56

Yes I do! I've learnt 'bout candelas, moderator elections and something about a talking Iranian enzyme among other things today! (..mumble mumble...)

(@Rubisco I've got nothing against Iran...just in case you thought otherwise...)

Rubisco

Meh . . .

I wouldn't care if you had something against Iran either

Aaron Abraham

Bleh...

Kinda wish I had :P

Rubisco

I just don't care about what people think. What they do, however, should be our concern

@AaronAbraham Well, I don't even know where you're from to hold effective grudges

Aaron Abraham

But then again, I'm not an Amerikaner...

Rubisco

I hold a grudge against Martians.

And Neptunians. JERKS

I really, really don't have a grudge against anybody. Not even the Saudi Arabians, which are people are love the least.

Aaron Abraham

15:00

Nah. not fond of the Saudis myself...

Rubisco

Usually, if you're loving/hating people because of what they are, not because of what they do, then you're doing it wrong.

Change that to almost always.

And religion isn't usually something to pick these days.

You either follow the crowd, or your ancestors.

Aaron Abraham

Hey, I hate people for what they do...and I hate them as a people ;P

Mein Ancestors!!!!

Rubisco

I mean, practically, people don't get to choose religion.

Aaron Abraham

I'm not KKK so I won't pick up religion as a metric for hatred....

'@Rubisco You've got a point there...

Rubisco

My point being that religion is mostly like skin color. It's something inherited to you.

There are good Muslims. Bad Muslims. Terrible Muslims. There are good Christians, bad Christians etc.

Then there's Germans

Aaron Abraham

15:03

Ever heard of something called 'albinism' ....

Rubisco

Yeah, it's delicious.

Aaron Abraham

Heyyyy...I thought Germans come under the good Muslims and Christians category...why a separate one XD ?

Rubisco

Best served with hot coffee

Aaron Abraham

You are the most racist enzyme I've ever known....

I am so voting for you..... XD

Wait, back to an earlier point...so there are good jews? :o :o :o

Rubisco

Sure, why not?

They're people.

Aaron Abraham

15:06

They're Jews...

That's different...

Rubisco

Religion only affects the everyday life of, say, one percent of the people on Earth.

And those are either terrorists, or hurt by terrorists.

Everyone else is more like "Oh yah, we've got a God, or a bunch of Gods. Whatevs"

It doesn't affect their being a good or bad guy

Aaron Abraham

(Such a philosophical enzyme......I've got to print this transcript and preserve it for posterity...)

Rubisco

I've been better

Aaron Abraham

I wish I'd been there...

If you're in Iran...shouldn't the heat have denatured you by now?

Rubisco

So I guess you're Russian.

Aaron Abraham

15:10

Nope, guess again...

Rubisco

Russians are the only people I've encountered that think Iranians are frying or something

2

Iran has a weird climate.

Aaron Abraham

LOLOLOLOLOL

Rubisco

This part of Iran has a cool climate. Not really hot, not really cold

@AaronAbraham Antarctica

Aaron Abraham

I laughed out loud when I read the 'frying' bit...it gets my star....

Hint: I'm from the same continent as you are.

Rubisco

India

New Zealand. If that's technically Asian.

It was last I checked.

Hmm, I've never seen someone from Turkey either

Really, India has the most users around here.

Malaysia isn't uncommon either

C'mon, spit it out

Aaron Abraham

15:17

@Rubisco India has the most?

Rubisco

In Asia, yeah

Aaron Abraham

Well I do see a lot of questions posted by Indian students...and like 95% of them are crap...

(Homework questions)

(..and something about the IITJEE..)

Hint 2: Our countries are allies...

(Not Russia, but we're allied to them as well)

Hint 3: English is not my first language...

Rubisco

Well Duh

What Asian country has native English speakers?

I'm not really convinced Indian English is a thing.

Aaron Abraham

Could be?

It was a Limey colony...

@Rubisco Kapitulieren?

Aaron Abraham

15:42

@Rubisco Last hint: We're a country notorious for sectarian strife, and crimes against religious minorities....

Rubisco

@AaronAbraham Well, I dunno

I mean, a lot of countries do that

More or less, prolly

Socially or politically.

Aaron Abraham

...

Rubisco

Even the freest country around here, the US, isn't really free

Aaron Abraham

(It was among the countries you mentioned earlier...)

Rubisco

Turkey?

Old Zealand?

Aaron Abraham

15:51

(And yeah...our 'English' is a thing ;) )

pH13 - Yet another Philipp

israel

Rubisco

NO IT'S NOT

@pH13-YetanotherPhilipp Mmm, this one too prolly

Aaron Abraham

YES IT IS

!

Rubisco

But I didn't mention Israel before

pH13 - Yet another Philipp

jews were mentioned

Aaron Abraham

15:52

No...not the Israel bit...

I'm Christian...

-_-

Rubisco

O' riddle master, would you spare our minds and spill the beans, 'cause I've come back from a math class and everything hurts mentally

Including, but not limited to, pH13

Aaron Abraham

@Rubisco You mentioned something about our 'English' not being a 'thing'...I was refuting that ;)

Rubisco

India. OF COURSE INDIA

Aaron Abraham

@pH13-YetanotherPhilipp You were reading this the whole time?!

Rubisco

He's one badass stalker, gotta admit

I should start stalking G-block

pH13 - Yet another Philipp

15:55

@AaronAbraham I read everything but not for the whole time

pakistan and bangladesh, if it is not india ...

Rubisco

pH13 is closely monitoring me to find my weaknesses

pH13 - Yet another Philipp

@Rubisco no, I’m watching you on how to be a super successive chat owner

Rubisco

@pH13-YetanotherPhilipp Yeah . . . sure . . . ಠ_ಠ

pH13 - Yet another Philipp

ಠ_ಠ

Aaron Abraham

Indisch, yep...

Rubisco

15:58

@pH13-YetanotherPhilipp ಠ_ಠ

pH13 - Yet another Philipp

@Rubisco ಠ_ಠ

Rubisco

@pH13-YetanotherPhilipp ಠ_ಠ

Aaron Abraham

And I would've gotten away with it if it weren't for you meddling kids...@pH13-YetanotherPhilipp @Rubisco

Rubisco

Would you mind . . . we're trying to work here.

Aaron Abraham

Oh right...sorry...

@Rubisco @pH13-YetanotherPhilipp ಠ_ಠ

Rubisco

16:00

@AaronAbraham ಠ_ಠ

Aaron Abraham

@Rubisco =*_*=

Rubisco

@AaronAbraham ಠ_ಠ

Aaron Abraham

Now about that math class you were talking about....

Rubisco

Downvoted thingy of the day

-13

The problem They ask, I answer, they delete. What can I do? And what should I have done? I answered a question, he accepted it, and then he deleted the question! Should I warn potential answerers that an OP has a history of erasing (probably homework) questions? Some new accounts display th...

feature-request deleted-questions post-ban rules vote-to-undelete

Aaron Abraham

XD XD XD XD XD XD

@Rubisco I have a feeling he want to delete that real bad....

Rubisco

16:08

Nah, PeterH is used to getting downvotes

Prolly

I didn't check, but he does get a lot of them

Aaron Abraham

I was actually kinda feeling sorry for him back there....

Rubisco

Hmph

Aaron Abraham

But as you pointed out, he must be used to them by now...

So I'm back to my original state of ambivalence...

Rubisco

It's typical of posts with a worse score than -10 to appear every couple of hours on meta.SO.

Some of them are highly entertaining

Emphasis on HIGHLY

U SO SUCKZ DEY NO WANT UNDERSTAD MY ENGISH

Aaron Abraham

Seriously....there was a post with a title like that? XD XD

Rubisco

16:12

Well, they used to invoke Godwin's law too

-13

Q: Extremely low attraction

I have made a question I need to be answered before continuing in a OSDev tutorial. Here it is: Cannot link linker.ld It has currently 32 views, 0 comments (2 favorites and 2 upvotes, no downvotes) that relate to the question/question problem (I wrote a comment saying thanks for the bounty, but ...

discussion questions bounty

Aaron Abraham

I'm joining SO right now ;)

Rubisco

You don't need to . . . OH NO ORTHO IS HERE . . . You don't need to do that to see their meta

Just leave a tab open

En garde @ortho

orthocresol

whimpers in a corner

Aaron Abraham

Oooh a fencing enzyme vs. an albino seal...THIS.WILL.BE.INTERESTING.

Rubisco

@orthocresol I AM not going to fall for that

orthocresol

16:15

I genuinely have to go off though. Just thought I'd see what was happening around here.

Rubisco

Me of course

DHMO

@Rubisco How do you breathe?

Aaron Abraham

@DHMO Proteins don't breathe....

Rubisco

@DHMO Like this

Breathes

DHMO

Well, we have a contradiction here.

@AaronAbraham and @Rubisco, please fight to decide the winner.

Aaron Abraham

16:28

@DHMO alrighty!

Rubisco

I may warn you

I know Kung Fu

Aaron Abraham

(gets the hydrofluoric acid...)

Rubisco

I know molecular Kung Fu. I have a fluoroantimonic belt

DHMO

you guys are gonna kill each other with the superacid

Aaron Abraham

(Calls Jesse Pinkman to come over with a couple of plastic tubs...)

(Gets some "This-is-not-crystal-meth" mercury fulminate....)

Rubisco

16:39

-2

Q: What is the difference between Copper Sulfate and Copper Sulfate Pentahydrate

First question from someone who know nothing in chemistry :D I want to do copper plating and seen people using Copper Sulfate but also there is Copper Sulfate Pentahydrate So what is the difference and which one should I use?

electroplating

Well, some people don't deserve an association bonus.

Aaron Abraham

@Rubisco Can we kick him out? Close the account somehow?

Rubisco

Why would we?

Aaron Abraham

Why shouldn't we?

DHMO

Why doesn't the other lone pairs of the oxygen atoms form hydrogen bonds?

Aaron Abraham

They probably do....just that particular diagram doesn't show it....

Rubisco

16:44

IIRC the dimer is the most stable possible structure.

DHMO

no, I am told that they don't

Aaron Abraham

WBU Rube's argument?

DHMO

@AaronAbraham what is that?

Rubisco

You need to take into account that other -mers attached would mean a lot of empty space in between.

That's not really stable

Aaron Abraham

* Rubisco's argument

DHMO

16:45

what is WBU?

Aaron Abraham

*What about Rubisco's argument?

Rubisco

Look at how solid the dimer looks.

DHMO

how does WBU mean what about

@Rubisco how solid?

Aaron Abraham

It doesn't look very solid...

Rubisco

Not solid per the definition.

Aaron Abraham

16:46

@DHMO (sigh) forget I said that....

Rubisco

I meant strongly, firmly standing

DHMO

@AaronAbraham nope, water never forgets

Aaron Abraham

If you'll excuse me gentlemen...there's a question I need to edit, cheerio....

Rubisco

. . .

Aaron Abraham

@DHMO Water doesn't exactly remember to begin with...

DHMO

16:48

@AaronAbraham well, water have stretching modes

they are memory

Rubisco

Nice. Pseudo-science 101

DHMO

lol

doesn't water stretch?

Rubisco

Yes

DHMO

exactly

Rubisco

But it's not like how hoomins stretch

It's more beautiful. More complicated

DHMO

16:49

I didn't say it is

Aaron Abraham

Enzymes stretch too no?

DHMO

I understand that when one H-O bond stretches, the other H-O bond contracts, right?

And then it is a vibration

Aaron Abraham

Koshland said so...

Rubisco

@AaronAbraham I don't like it though

DHMO

How many water molecules can one carboxylic acid molecule hydrogen-bond to?

Rubisco

16:52

Four or less, obviously

You need to be specific

DHMO

we are taught that it can only form 2

Rubisco

It can even be more than four, depending on the other groups in the carboxylic acid

Aaron Abraham

You've a point there...

Rubisco

@DHMO So you're only talking about the carboxylic acid derivatives of alkanes with less than, say, 7 carbons?

DHMO

@Rubisco is this somehow relevant?

Rubisco

16:54

Of course it is

It makes all the difference.

DHMO

interesting; why?

Rubisco

It's all about how much space the water molecules have to form a hydrogen bond.

Counting the number of lone pairs will usually give you a wrong answer.

DHMO

is there any systematic way?

Rubisco

Since you usually can't fit as many molecules as you counted there.

Stuff takes up space.

@DHMO No, just memorize whatever you should, answer tests and be done with it.

DHMO

@Rubisco ...

Rubisco

16:56

This isn't usually real science. It's just part of the lesson people thought the lesson would feel incomplete without.

DHMO

then what is real science?

Rubisco

@Ortho come and smite at will. I ended a sentence with a preposition.

@DHMO Things that you will remember after ten years.

DHMO

@Rubisco how many molecules of water does alkanoic acid molecule hydrogen-bond to in real science?

can acetic acid form 4 bonds?

Rubisco

As many as a real scientist experimentally verifies.

DHMO

has that been done?

Rubisco

16:59

These days, I guess they just do a bunch of simulations and calculations

DHMO

can i consider a polar-covalent bond to be the resonance hybrid of a purely covalent bond and a purely ionic bond?

Rubisco

O.O

DHMO

o.o

what does it mean?

Rubisco

The dipole moment oscillates around a certain, average point, but this is a view I hadn't considered

That's really not what the resonance structures are taught for

DHMO

oscillate?

Rubisco

17:01

I have got my answer properly :D — Muhammad Nour 39 secs ago

You got the downvotes properly as well.

DHMO

@Rubisco go and comment that there

Rubisco

@DHMO Yes, the electron cloud density doesn't remain the same around the atoms in a molecule.

It changes very, very rapidly.

DHMO

@Rubisco :o

Rubisco

But the changes are negligible.

DHMO

if they are negligible then how did you detect them

Rubisco

17:03

I didn't

DHMO

do they also form magnetic fields?

Rubisco

I just read about them

DHMO

@Rubisco the "you" was generic

Rubisco

You should ask the people that did

@DHMO When you use past tense, it can't be

DHMO

alright

Rubisco

17:04

@DHMO Do you know how NMR machines work?

It's intriguing.

DHMO

@Rubisco that's not boxes are put there for

@Rubisco not at all

Rubisco

@DHMO Do you know of Lenz's law?

DHMO

@Rubisco yes

Rubisco

Then grab an online tutorial and read about how NMR works

DHMO

alright

Rubisco

17:06

It might also be related to how those changes are detected

@DHMO Nah, it'd be mean

DHMO

@Rubisco why shouldn't you be mean?

Rubisco

Because of unstated social rules

DHMO

but you are an enzyme

you don't need to think

Rubisco

Hence you think I am uncivilized?

DHMO

how can an enzyme have civilization?

Rubisco

17:50

Someone superping this Krithik dude/dudine and tell them to edit responsibly

Loong

yeah i might have said it wrong, so what is the parent structure? — Don Nestor Razon Jr. 2 hours ago

reminds me that I should not give hints in comments.

Rubisco

18:06

@Loong so what is the parent structure?

Loong

Organic compounds can be expressed as derivative of methane. Maybe we should try that. ;-)

Rubisco

@Loong yup. But what is the parent structure?

orthocresol

18:35

@Loong en.wikipedia.org/wiki/Volume_element

Needs more mathrm.

Loong

$\mathrm{https://en.wikipedia.org}$

orthocresol

Is there a thin space before each \mathrm{d}<variable>?

i.e. f(x,y) \,\mathrm{d}x\,\mathrm{d}y

or only one

Loong

@orthocresol yes, for each d

orthocresol

Okay, thanks

Loong

ftp.ams.org/ams/author-info/documentation/howto/mit-2.pdf

3.1.3i on page 40

orthocresol

18:40

I'll bookmark that.

Loong

you could write \,\mathrm dx, but that saves only one character

orthocresol

Not worth reprogramming my fingers :)

Loong

@orthocresol That document may contain some special typography that is only used by AMS but not in international science and technology; that's why I don't link to that file on meta.

@mel⁠bel Did you withdraw your nomination?

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