The Periodic Table

5:00 PM

> Showing results for carboamination. Your search for carbamidation retrieved no results. (PUBMED) -- Are they also synonymous? This drives me crazy, terminology.

Rubisco

@CowperKettle No, I don't think so. Next time, choose some organic chem thing.

CowperKettle

@Rubisco Choose for studying, you mean?

Rubisco

@CowperKettle Or translating

CowperKettle

Okay, what is "carboamination"?

DHMO

Finally a question with quality since 13 hours... — DHMO 5 secs ago

1

Q: Pi electron stacking, how does it work?

I've come across the term base-pair stacking (with reference to B-DNA) in my school text book, and I had posted a question in that regard on Bio.SE. I've also seen a similar (albeit brief) version of my question on Chem.SE. I looked up the term online, and after checking out a couple of links,...

Rubisco

5:10 PM

@Ortho, did you fall sleep or something?

@CowperKettle adding Carbo + amine? I'm guessing here

Wildcat

@Rubisco XD

orthocresol

@Rubisco No, I'm editing the post.

Rubisco

@Wildcat I'm waiting for this guy to finish his . . . holy crap then that has taken too long

I'm waiting for this guy to finish his edit so I can add some stats of another month for comparison.

@orthocresol You sure it's just a bunch of stats?

CowperKettle

Is carbamidation even a real term?

DHMO

@CowperKettle how do you define a real term?

CowperKettle

5:18 PM

Only 88 hits in Google and only 12 mentions in books.

pentavalentcarbon

@DHMO it has no complex part

CowperKettle

here's one mention

@pentavalentcarbon LOL

orthocresol

4

A: Let's not close questions as homework except for blatantly obvious cases (at least for a while)

Pre-experiment stats up to 2016/08/31 16:00 UTC. Post-experiment stats up to 2016/10/01 16:00 UTC. Total question statistics $$\begin{array}{|c|c|c|} \hline & \textbf{Pre-experiment} & \textbf{Post-experiment} \\ \hline \text{No. of questions} & 16\,753 & 17\,385 \\ \text{Qns without accepted ...

CowperKettle

@DHMO I define as "a term that can be understood by chemists and used in scientific publications"

DHMO

Alright

Rubisco

5:19 PM

HOLY CRAP . . . it looks . . . Hugs @Ortho

DHMO

@orthocresol where's your question?

CowperKettle

> We are having elections! Do you have a question for the candidates? (I stumble at this sign now and then and misread it as electrons)

orthocresol

@DHMO Real life and meta "drama" happened.

Wildcat

@orthocresol TTTTABLES! :D

pentavalentcarbon

@CowperKettle That's how you know deep inside that you're a scientist.

CowperKettle

5:20 PM

@pentavalentcarbon Whan if I misread it as erections. Would it mean I were a reproduction biologist?

DHMO

yesterday, by DHMO

Am I the only one who often reads this as "We are having electrons"?

yesterday, by DHMO

2 days ago, by Martin - マーチン

We are having elections! Do you have a question for the candidates? More information on meta.chem.se.

yesterday, by Rubisco

@DHMO Yes. Feel alone.

pentavalentcarbon

@CowperKettle Errr, no, just a normal adult male...

4

Rubisco

@CowperKettle No, that means you should stop searching porn on the 'Net

CowperKettle

(0:

orthocresol

@pentavalentcarbon Did you just assume its gender?

Rubisco

5:22 PM

@orthocresol That's kettlist!

pentavalentcarbon

@orthocresol You're right, that's just as bad as the pot calling the kettle black.

Rubisco

Let's all squint disgustedly at @Penta

pentavalentcarbon

@Rubisco You do anyway, so.

Rubisco

→ 1 message moved to Sandbox

DHMO

@Rubisco ...

thank you for your invitation?

Rubisco

5:23 PM

@DHMO I have an allergy for when suddenly big things pop up

@DHMO That's automated, not my fault

DHMO

@Rubisco i know, just saying

Rubisco

@DHMO It's RO duty man. Sometimes rooms need cleaning.

DHMO

2

Q: Pi electron stacking, how does it work?

I've come across the term base-pair stacking (with reference to B-DNA) in my school text book, and I had posted a question in that regard on Bio.SE. I've also seen a similar (albeit brief) version of my question on Chem.SE. I looked up the term online, and after checking out a couple of links,...

biochemistry electrons chemical-biology

Can anyone answer this?

Rubisco

I'm proving to myself I won't screw up much if I run in the election.

DHMO

The comments pretty much sorted out everything

just that I am not sure enough to make that an answer.

orthocresol

5:26 PM

pi stacking is something that we are not very sure about to this day.

pentavalentcarbon

@DHMO Why not try answering? It's fine to start somewhere. I see too many "answers" in the comment sections.

Don't be afraid to attempt answering something.

Rubisco

@pentavalentcarbon That's a pain in the A in the language sites

DHMO

@orthocresol heh, i pretty much just blindly guessed in the comments

i never heard of pi-stacking before

orthocresol

!!doi/10.1021/ja00170a016

Rubisco

Well, now you have.

pentavalentcarbon

5:29 PM

@Rubisco I'm not surprised. Worst case scenario, you get flooded with garbage. But I personally believe in encouraging participation, especially from people who are interested in the site.

Chemobot

DOI 10.1021/ja00170a016 :
"The nature of .pi.-.pi. interactions"
First author : Christopher A. Hunter

DHMO

@Chemobot very helpful thank you

pentavalentcarbon

@Chemobot .-.

orthocresol

well, that's not useful, you could at least give us a link

pubs.acs.org/doi/abs/10.1021/ja00170a016

Rubisco

@pentavalentcarbon ELU is full of ranters that know how to eloquently be like 6-yo children. ELL just doesn't care. Linguistics is too quiet for a pattern to be noticed. Others I don't creepily watch

Someone find Hipp.

pentavalentcarbon

5:31 PM

@Rubisco :(

@Rubisco He is sometimes in the anime chat.

Rubisco

@pentavalentcarbon Whaddya know, when I say we have a little peaceful site with minimal issues and cool people I'm not exaggerating at all.

Chem has the best atmosphere in SE.

pentavalentcarbon

@Rubisco never said otherwise...

Everyone here is very nice.

Rubisco

All other sites may be famous for some good things, but also for some really terrible things.

TeX people are too nice, it makes you sick. O.O

pentavalentcarbon

And their content is amazing.

Rubisco

Like that creepy nice, in the cartoons

orthocresol

5:33 PM

Can we ban questions that ask about using VBT/hybridisation for TM complexes?

Like, we really need a custom close reason for this rubbish.

pentavalentcarbon

@orthocresol That question.

That one has other problems.

Put the charge on the complex, dangit

Rubisco

I was thinking to spend the last custom CV slot on data questions.

Or maybe amirite questions. Amirite questions rarely spark any interest.

orthocresol

Heh i was just kidding dont worry.

YES

Rubisco

Amirite questions are also really localized.

orthocresol

"Plz verify my work, my textbook say answer is B but i got A."

Answer: "Ur txtbk is wrng crect answer is A."

DHMO

5:37 PM

0

A: Pi electron stacking, how does it work?

As our mighty seal has said: pi stacking is something that we are not very sure about to this day. However, I will try my best to answer. As you have said, the stacking is interaction between two $\pi$ orbitals. Therefore, the orbitals overlap to create new bonding ($\sigma$) orbitals, wh...

plz check answer

orthocresol

I think, tomorrow I will have a look at what kind of questions I hate seeing, and try to come up with some coherent thoughts. Right now it is very jumbled.

Wildcat

@orthocresol the endless list of questions :D

orthocresol

@Wildcat Sadly there's no shortage of questions I don't like on the front page right now

So you are actually, quite spot on!

:(

Rubisco

@DHMO plz don't write plz. Some people here have a trigger for txtspk

DHMO

@Rubisco ...

Rubisco

5:39 PM

The only plz we would write is for satirical purposes.

orthocresol

TRIGGERED

Rubisco

@DHMO That ellipsis is wrong, but we'd get to that. :P

DHMO

$\Huge\color{green}{TRIGGERED}$

orthocresol

hands Rubisco a tissue

pentavalentcarbon

$\color{red}{\dots}$

CowperKettle

5:42 PM

Can cysteine get carbamylated? Only if it is at the end of a peptide?

orthocresol

$\color{purple}{\forall n \in \mathbb{Z}^+, n>2}$

CowperKettle

How is the -NH2 thing called?

orthocresol

@CowperKettle What thing?

pentavalentcarbon

The N-terminus?

CowperKettle

@orthocresol The NH2 group in an amino acid?

orthocresol

5:46 PM

In a free amino acid?

CowperKettle

A, N-terminus. So if a protein is enzyme-digested, some peptides have free N-groups sticking out, and these can get carbamylated.

orthocresol

I'd just write N-terminus.

CowperKettle

So cysteine can get carbamylated if it happens to have its N-terminus free in a peptide

It can be connected via the N-terminus, then it can't get carbamylated.

orthocresol

The N-terminus is a property of the polypeptide

Not the amino acid

I'd write: cysteine can undergo carbamylation if it is the N-terminal amino acid.

CowperKettle

@orthocresol Thank you!

If we have just cystein,how would we call the -NH2 thing?

orthocresol

5:49 PM

The amino group.

CowperKettle

thank you!

Now I'm starting to understand the sentence I'm translating.

orthocresol

0

Q: Pollutants combining together to form less harmful products

Which atmospheric pollutants emitted by internal combustion engines, are reacted together to convert them to less harmful products? (A) Carbon monoxide and nitrogen dioxide (B) Carbon monoxide and unburned hydrocarbons (C) Nitrogen dioxide and sulfur dioxide (D) Sulfur dioxide and unburnt h...

homework reaction environmental-chemistry

Exotic molecule...

CowperKettle

Is this a good question?

Rubisco

0

Q: Feedback on The Experiment

The experiment is over. Here are the stats, beautifully crafted with heavy MathJax with stats topping$^1$. Here's my take. Nothing really changed where we worried about change. You can play with this SEDE query to compare$^2$. We didn't get an influx of stuff that didn't end up answered. We didn...

discussion homework vote-to-close experiment

orthocresol

Nah, it's lousy.

Rubisco

5:53 PM

I expect three answers on my desk in two hours. @Ortho @Wild @Penta

orthocresol

@Rubisco You couldn't wait for 1,3-feeds, could you?

Wildcat

@Rubisco no way! It's Saturday! :D

Rubisco

@orthocresol Deja vu. Someone told me that before

orthocresol

@Rubisco feel like it was Jan

1,3-feeds is a little slow though, must say :D

1,3-feeds

2

Q: Feedback on The Experiment

The experiment is over. Here are the stats, beautifully crafted with heavy MathJax with stats topping$^1$. Here's my take. Nothing really changed where we worried about change. You can play with this SEDE query to compare$^2$. We didn't get an influx of stuff that didn't end up answered. We didn...

discussion homework vote-to-close experiment

Wildcat

6:10 PM

:D

Rubisco

@1,3-feeds You make me yawn

If this is how robots are gonna take over the planet, humans have time to relax.

pentavalentcarbon

@Rubisco if you're being serious, ok

Rubisco

@pentavalentcarbon thankz

orthocresol

Somehow, I feel like getting everybody to post their opinion is not going to get anywhere.

pentavalentcarbon

@Rubisco No problem. We all want basically the same thing.

orthocresol

6:22 PM

It's great to hear all views, but we need to reach a consensus

Rubisco

@orthocresol It's not supposed to get anywhere. I just wanna make sure we're not looking like a little authoritarian group that decides everything when we say we don't have a problem with the experiment continuing to be.

If anyone has an objection, they can voice it there.

orthocresol

I am thinking that, at the end of this discussion, we should come up with a list of "characteristics" that might warrant closure, and we vote on them.

Rubisco

That main question in bold is not for cosmetic reasons. The highest voted answer will contain an answer to it and will count as consensus.

@orthocresol Oh, that discussion hasn't even started yet

orthocresol

Fair enough. :)

In that case, I can answer this question relatively quickly.

Rubisco

@orthocresol I can hold my breath under aqueous conditions for more than 90 years without reacting

orthocresol

6:51 PM

FWIW, I did feel that in the past HW was getting unfairly slapped on some questions.

It felt like "hmm, I don't like this question, let's just close it as HW because nearly everything can be closed as HW". And the vagueness of the HW policy meant that it was very open to interpretation.

And I must admit, I was also guilty of misusing it on some occasions!

Rubisco

Time to confess. Me too!

Loong

Welcome to Chemistry.SE! Take the tour to get familiar with this site. Mathematical expressions and equations can be formatted using $\LaTeX$ syntax. This appears to be a homework question, please share your thoughts and attempts towards the solution. If you receive useful answers, consider accepting one. :P — Martin - マーチン ♦ Sep 27 at 15:43

orthocresol

:(

Rubisco

Also I ate your ice cream the other day Ortho. That was me.

orthocresol

!!icecream

sobs

Chemobot wherefore art thou

It sounds like chemotherapy bot to me

Loong

6:56 PM

!!test

Chemobot

edited !

Rubisco

@Chemobot French punctuation? FRENCH PUNCTUATION?!

CowperKettle

Maybe someone knows by chance what "fixed modification" and "variable modification" are in the context of MS/MS study of protein structure..

orthocresol

nope

CowperKettle

I found this tutorial, will try to understand

Rubisco

7:02 PM

@CowperKettle We're chemistlings, not internet

pentavalentcarbon

@orthocresol Not sure why chembot wasn't chosen instead.

orthocresol

@pentavalentcarbon I've been trying to think of a punny name for it for the last few minutes but couldn't come up with anything

CowperKettle

7:19 PM

@Rubisco But some chemists do work with MS/MS

Rubisco

Generally, voting is something you help moderate the sites with, but it's not like flagging or voting for closure. I can vote however I want. I can upvote this question. I can downvote it. I can even opt not to vote it. You can't say the same for flagging. I can downvote someone's post because I'm a jerk and don't like their face, and this isn't against the rules if it's not serial voting. See? That's why a voting review queue doesn't make much sense. — Rubisco 12 secs ago

CowperKettle

But I agree, this is a too specialized question to know right away.

Rubisco

Unrelated badass comment of the day

CowperKettle

Shab bekheyr

Rubisco

Haha that's weird coming from you. Night

pentavalentcarbon

7:28 PM

@orthocresol stop editing your post and making me reload the page

orthocresol