The Periodic Table

buttonwood has left the building

Shokhet

Yeah, I figured. He'll see it when he gets back, I suppose

...that's what happened with his message to me

yeah it's cool, he'll get your ping

3:02 AM

organic people, any ideas on this? chemistry.stackexchange.com/questions/59487/…

I would say I cannot tell without experimental data, but I'm probably rather inexperienced.

5:02 AM

@orthocresol seems complicated..

again, dont have any experience on my side either

if i were to be naive..

i would say 1,3,2..

but something tells me it's not that simple lol

5:21 AM

but then that is if I look at it the way the op did with SPh as the leaving group..

I am more inclined to side with your view of NGP participation/ring flip explanation

I have no clue, it is possible that the cis isomer loses SPh and the trans loses Cl via NGP

quite a disgusting question imo

Only thing we can be sure of is that 2 is slowest

5:43 AM

Yes. agreed 2 is definitely the slowest.

clearly not a trivial exercise..but "disgusting" haha, a bit harsh?

6:33 AM

> To each Eppendorf tube with the sample we added 120 µl of 1% H2O in DMSO, then 20 µl of iodomethane and mixed for 1 minute on Vortex.

Isn't it a strange phrase? "1% H2O in DMSO"

It is usually something else in water, not water in something else

hmm well i guess its okay

the solvent here is DMSO so

thank you!

I just wasn't sure, thought that the authors mixed up something in the text

hmm don't think so..

> We next added 14 mg of powdered alkali to the same tube.

@getafix I just have issues with overly broad generalisations, like "NGP will always be faster than no NGP" that is not true

6:38 AM

It's odd that they do not mention what the alkali was

and this question strongly leads people to make such generalisations

@agreed. fair enough

maybe I was a tad harsh :p

Q: What is the advantage of developing a resistance modifying agent over developing new drugs? Won't bacteria become resistant to either one?

0

Just curious. There's a bit of buzz in my department over RMA discovery. However, I don't understand how an RMA is any better than a new antibiotic. Won't bacteria evolve resistance to either one in similar amounts of time? One explanation that was given to me was that since RMAs don't directly ...

medicinal-chemistry

^Maybe more appropriate on bioSE?

yeah

6:55 AM

> We adjusted the pH of the solution to 6–8 using 5 M solution of hydrochloric acid and 5 M alkali.

Do we say it like this? Just "5M alkali"?

> We adjusted the pH of the solution to 6–8 using 5 M solution of hydrochloric acid and 5 M alkaline solution.

This may be better

Isn't 5M too strong a concentration to fiddle with?

Maybe the authors made a mistake

Maybe it was 5%?

@CowperKettle if you use conc. HCl, then you need less of it.

as opposed to adding 1 M HCl

where you need to add 1 cm3 by 1 cm3

and monitor the pH

it will 1) take ages 2) dilute whatever else is inside

So it's a normal concentration? Thank you!

yeah, it is very normal

They're using an Eppendorf tube, that might limit their volume indeed

i don't know what 5 M alkali means, it is quite unspecific

but i assume that it is 5 M OH-

7:07 AM

I don't know either. I translated it as "alkaline solution"

what procedure is this?

sounds very bio0ish

bio-ish

Mass-spectrometric determination of oligosaccharide structure

icic, that is interesting

Using MALDI

:)

yep, MALDI is great for biomols

7:09 AM

(0:

I love the camera view on the MALDI machine (at least the once that I have used once)..it's like playing a videogame

I've only actually used ESI before

it's boring... stick your sample in a vial, chuck it in the machine, press a couple of buttons...

that could just be us though :p

@getafix You can see how the laser vaporises the matrix?

No, unfortunately you can't

but you can see the spots on your plate..

ah

7:11 AM

you can choose specific spots to go to..and it's got cross hairs and everything haha

(0:

@orthocresol yuo ESI, same

dull

> We next added 0.7 ml of chloroform and mixed in a refrigerator for 10 min using a Vortex unit. (I'm not sure about "refrigerator". Maybe in English the usual phrase is "in a cooling chamber" or simply "in the cold" etc)

Q: Storage of methane in mineral oil or other liquid hydrocarbons

3

Is it practical (or even possible) to store gaseous alkanes such as methane or ethane in liquid alkanes such as those in mineral oil or gasoline, and how much more (or less) methane can be stored for a given pressure with solvent vs. no solvent? After some research, I found that butane is some...

solubility solvents fuel hydrocarbons

Wish i get this bounty, i've actually never won one lol

@CowperKettle refrigerator means the refrigerator, haha

like a kitchen refrigerator

except that it has chemicals and not food inside

and/or microorganisms

7:23 AM

@orthocresol What then is the correct term in a procedure description?

refrigerator!

it means exactly what it is

ah, okay

they have those in the lab too

I find many formulations in English differing from the phrases used in Russian, so I'm trying to constantly check this or that phrase

yeah don't worry

7:39 AM

> Shelf life of the glycan samples: one month in the dry state at 20°C.

Is it really "shelf life"? We're not selling them, they are only samples to be kept in the lab.

ZipTip C18 - for some odd reason the authors call them "microcolumns" in Russian. Probably a mistake. These are pipette tips

shelf life is still okay :)

thanks!

Q: How does the wax layer of a leaf get damaged by acid rain?

I would say that shelf life is the length of time that a commodity may be stored without becoming unfit for use..simple

0

I know that wax is not soluble in water so i think it doesn't react with or dissolve in water-based solvent. Some sources I have consulted say that it does react but slowly. So getting confused by different opinion, i have no idea what the truth is.

biochemistry

What do you guys think about this?

what is in epicuticular wax in plants anyway?

There must be some published research on this

on acid rain defoliation and its mechanisms

perhaps.

7:52 AM

in Google Scholar

but the OP is concerned particularly about the effect on the epicuticular wax?

but first, we don't know what's in it

it might differ from species to species..

the OP doesn't specify.

Effects of simulated acid rain on production, morphology and composition of epicuticular wax and on cuticular membrane development

oh cool..

cool oh . . .

o/

7:56 AM

\o

Good noon, Muhammad

Good noon

My name's Artyom (0:

Huh

For real?

> The boy's and girl's name Artemis \a-rte-mis, ar-temis\ is pronounced AR-te-miss. It is of Greek origin. Mythology: name of the Greek goddess of the moon, of hunting, and of chastity, equivalent to the Romans' Diana.

Yes

7:58 AM

I think it's a common russian name isn't it?

Yes, it is quite common in Russia

Think it has got a nice ring to it

sounds cool

(0:

Artyom

Artyom (Russian: Артём) is a male given name common in Russia and other Slavic-speaking countries. The name uses the "ё" letter, which can be transcribed to English as "e" but still has the "yo" sound. Furthering confusion there is another name Artem (Ukrainian: Артем), whose only spelling in English is "Artem", and is pronounced with the "em" ending syllable. The name is derived from the Ancient Greek name Artemios (Greek: Αρτέμιος), the name of the saint Artemius, derived from the name of the goddess Artemis. == People == === Artem spelling === === Artyom spelling === Artyom, nickna...

Artyom is a cool name.

Providing that I pronounce it right.

'cause I never get foreign name spellings right.

And stick to the wrong one.

Muhammad is also quite cool. We had a handicrafts teacher at school named Muhammad

8:00 AM

Same for pronunciation

@CowperKettle And he was cool?

Only he pronounced it as "Magomet"

@Rubisco He treated us like his own children.

That's why I remember his name still.

That's warm.

He was from Central Asia or from Caucasus, I don't know now.

Magomet Karaburayevich (his patronimic; I don't know his surname, it was even more complex, too complex for a child to remember)

Turns out " ZipTip C18" is the name of a pipette tip and of a microcolumn

Your articles are weird.

Hey @Ivan

8:17 AM

random question: does using the app count towards site visits?

@getafix Yes

Logging in counts towards site visit.

awesome I got the enthusiast a while ago, thought of making an attempt at fanatic

> We washed the microcolumn with 80% acetonitrile in water, then with water. We next injected the samples, washed with water, and eluted them onto the plate using a 20 mg/ml matrix (2,5-dihydroxybenzoic acid) in 50% acetonitrile with 2 mM sodium acetate.

I don't get this. Can one "wash with water" after injecting the samples into the column?

I used the verb "inject" because it seems that it is the common verb in English for this operation. In Russian it is "we placed the samples on the column"

@Rubisco I can't argue against deliberate usage, damnit D=

@Rubisco Help centre says otherwise. But just logging in and visiting a second page is enough in my experience xD

@Jan Well, you should have a tab open

8:37 AM

> 20 mg/ml matrix (2,5-dihydroxybenzoic acid) in 50% acetonitrile in 2 mM sodium acetate.

Does it mean "we took 2 mM NaOAc, then added acetonitrile until it was 50%, then added the matrix until its concentration reached 20 mg/ml"?

It's quite unclear to me

8:55 AM

How are samples put into the column?

Are they instantly in the column, or is it possible to load the samples, and then wash the column itself, not affecting the samples?

A Brief Introduction to Packing, Loading and Running Chromatography Columns

9:07 AM

►

Hmm. How can one "wash the column" after loading the sample here. No way.

9:26 AM

Why the octet rule? Why do they like full s and p orbitals? I thought there are some voices which deny the stabilizing effects of a half-filled or a full orbital at all.

@user34388 If you use all not fully occupied orbitals for bonding and manage to lower all bonding electrons in energy, that is a stabilising effect.

10:03 AM

@jan why are their energies lowered?

10:48 AM

ugh, that demjanov ring expansion is a duplicate of something, but i just can't find it

not precisely demjanov, more like a semipinacol i guess

11:11 AM

AHA

@orthocresol Found one?

Q: Alkene and alcohol reactivity and 3 member ring expansion

1

What will be the major product in the following reaction? I tried and I got C to be the answer (which is the answer in the book as well),but I've heard that 3 member rings generally don't expand due to their exceptional stability. So what is wrong here? Also I have assumed that the ...

organic-chemistry reaction-mechanism alcohols

and the question's gone..

o.o

In that case, I shan't draft an answer.

aha, no wonder, it got -4

(It took me ages to get Chem Draw running today for some reason, otherwise I would have answered before lunch)

11:14 AM

i think i will tidy up the old question. needs more keywords

I wonder why I didn't find that question. I searched for methyl cyclopropyl.

i couldn't find it with semipinacol or semi-pinacol

needed to search for "ring expansion"

11:32 AM

\o/ As of now, I can finally vote to delete answers.

Nobody is safe from my wrath anymore x3

how many votes does it take to get something deleted?

A: Semipinacol-type rearrangement leading to ring expansion

6

Three-membered rings are not exceptionally stable, on the contrary, they suffer a lot of ring strain and readily take part in ring-opening reactions. Exceptions include the Hückel-aromatic cyclopropenyl cation, and the resonance-stabilized cyclopropylmethyl cation. Your assumption that the al...

Are the deprotonation steps carried out as readily as the protonation steps in an acidic environment?

@orthocresol Three trusted users’, one moderator’s or six recommendations in the review queue. (A trusted user’s delete vote counts as a recommendation there.)

@Jan i see, well done on 20k by the way ;p

@ortho you could have added Demjanov as a key word, or did I just not read it? ;p

11:36 AM

if I am not wrong, Demjanov refers to a specific way of getting the cation, by diazotisation of $\ce{R-NH2}$ to $\ce{R-N2+}$ and loss of $\ce{N2}$

@user34388 the equilibrium may or may not be favourable, but the kinetics are very fast. so it does not matter that much in terms of deducing the product

@Jan at least, that is what wiki told me

@orthocresol Oh, okay. As always, just assume I am bad with names ^^'

@ortho but if the eqm does not favour then how is the product formed?

@user34388 a bit of product is formed. that pulls the eqm over by LCP. rinse & repeat

@orthocresol formation of product does not shift eqm according to lcp..

@Jan I'll just add it in anyway, doesn't hurt I guess

A1 <=> A <=> A2 <=> B --> P

user116211

11:40 AM

@orthocresol Would look good in mathjax ;P

meh, never mind

@ortho i thought you were talking about LCP?

but B->P is irreversible

yeah.. $\mathcal{A}^1 \Longleftrightarrow \mathcal{A} \Longleftrightarrow \mathcal{A}^2 \Longleftrightarrow \mathcal{B} \longrightarrow \mathcal{P}$

or are we talking about microscopic reversibility...

user116211

@orthocresol \o/

11:42 AM

well, P is pretty stable so lets assume that it doesnt really wnat to revert

user116211

Very much looks like you are doing some exercises of First-Order Logic ....

you form P, then [B] decreases, that pulls the A2 <=> B eqm over, so [A2] decreases, etc...

wow, nice

@MAFIA36790 I propose we use mathcal instead of ce from now on

except that resonance is not a dynamic eqm... @ortho

11:43 AM

whatever

btw, that is not even resonance, that is a logic symbol for iff

...

!!doubleflip/whatever

@MAFIA36790 $\forall x \in \mathbb{Z}^+$, prove that ...

Chemobot

ɹǝʌǝʇɐɥʍ＼(｀д´)／ʍɥɐʇǝʌǝɹ

Ah, ended up with 6.98 pH wanted about 7.2 pH hope it doesnt affect too much.. — Lennart 2 mins ago

@Jan And this is why you should never trust buffer recipes, especially if they're from the interwebs.

And with that, I'm going to permanently shut down the SE time sink for today and work on my thesis. o/

@Jan all the best

11:49 AM

What does it take to memorize the reactions of the infinitude of chemicals...

user116211

@orthocresol You are kidding, right?Even if you want to do some sort of that, you can use \mathrm instead of \ce. \mathcal is reserved generally for writing operators.

user116211

@orthocresol ...that $\mathbb Z^+$ is not a sub-field of $\rm C$

@MAFIA36790 yes, of course.. lol

12:16 PM

@orthocresol like, how do you memorize so many classes of reactions

1:54 PM

@orthocresol It's complicated

2:12 PM

I saw this videos where a guy uses small amount of sodium cyanide to remove the stains. Would that be safe? — Prakhar Sankrityayan 8 mins ago

That's why we don't answer personal medical questions.

@Loong or maybe that's natural selection at work..(if he does use cyanide to remove the stains)

2

A doubt regarding Electrochemistry......I did ask this on SE (chemistry.stackexchange.com/questions/59439/…) but I've got no response as of yet........its regarding two equations for ionic conductivity (in solution), I'm not sure which one's correct. Could anyone help me out?

@getafix any ideas?? (Well, you DID help me out on my last question.. :) )

@AaronAbraham I'll take a look at it tomorrow. I am off to bed right now, sorry

Ah well, thank you anyways!

Good night ;)

2:27 PM

@AaronAbraham I just made an edit to bump the question to the front page.

G'night. Sure someone else can help you

Ah, Danke schoen Loong!

That was thoughtful......

@Loong I mean, NaCN isn't harmful at all, unless you breathe it in, eat it, get it on your skin, or get it on your eyes, in which case it basically kills you, but that's not a big deal

..............

Do I detect an undertone of sarcasm there? :P

@AaronAbraham actually, NaCN in the lab at least is fairly... fine... as long as you have appropriate PPE and aren't stupid....

that said, very smart people can still do stupid things, so if you don't have to, just don't use it

2:36 PM

@AaronAbraham If you want a current and official reference, you might want to try the Green Book: iupac.org/fileadmin/user_upload/publications/e-resources/…

@orthocresol youtube.com/watch?v=xz7i11XC9wk This was an interesting watch ;)

@Loong That was really useful.....not just pertaining to the topic of my question though.....thanks a lot!

@user34388 lots of time, see, most people here who know stuff (and I hardly know much compared to a lot of people here) have / are doing a PhD

What about you?

Sep 19 at 13:24, by orthocresol

i still have two more years of undergrad haha

Where are you doing it?

2:41 PM

@AaronAbraham I guess, your equation is on the printed page 73 (page 88 of the pdf).

Found it...and THANK YOU!

A: Brown stains on skin after working with Tollens' reagent

15

The stains are due to silver nitrate, the reactive portion of Tollens’ reagent. It is very prone to reduction to metallic silver. If you got it on your hands (a clear signal you weren’t wearing gloves when you should have been) it will create small silver particles in your skin — this is why it ...

How the h*** did this get 15 upvotes

@orthocresol sure

Why not (I upvoted this too 3:) )

?

sure but

3 hours...

@Loong Now that my question's answered, is it advisable to delete it ?

@user34388 Ah well, 3 hrs is a bit.......short.....

2:44 PM

@AaronAbraham exactly

But it's still a pretty decent answer.....that's @Jan for you...

@orthocresol Yeah, you usually work with various things that are much more dangerous than NaCN during your course of study. HCN is just well known.

indeed it is

There's a lot of traffic today, I guess?

perhaps

user116211

2:46 PM

@Loong That's insane ;/

@AaronAbraham No, you should not delete it. You may write an answer yourself. Or you can wait; maybe someone writes a better answer with a nice explanation.

user116211

@orthocresol I have three ;/

@Loong Point taken.....and thank you yet again....

user116211

@AaronAbraham oh, don't use CAPS.

CAP?

2:59 PM

finally asked a question on another Stack Exchange site...a bit nerve-wracking IMO

user116211

3:10 PM

@pentavalentcarbon link! link!

Sorry to get your hopes up but it isn't physics or math

user116211

@pentavalentcarbon Don't care... link! link!

Q: Specify multiple options for possible mode in file

0

It is clear from the manual how to set file variables: -*- mode: modename; var: value; … -*- For example, at the top of my ~/.gitconfig file, I have # -*- mode: conf; -*- I recently discovered gitconfig-mode, which makes this unnecessary, except in the case that this .gitconfig is opened in...

major-mode file-local-variables

aaaagghhhhhhhhh

don't steal my thunder

user116211

@orthocresol ahh!

3:12 PM

@pentavalentcarbon :( sits in corner

shhh is ok bby !!img/alpha-pinene

Chemobot

Once nice thing about being a "grownup"...no one can put you in the corner anymore but yourself.

user116211

Hmm, seeing that all excitement of mine got marred...

user116211

This really bothers me a lot:

user116211

3:16 PM

Why do people ask maths question at Physics ;((

I'd guess it's because 1. the distinction between math and physics is perceived to be much smaller than physics and chemistry, and 2. Physics.SE is very popular.

user116211

This makes the review queue longer.... and more work for us.

I don't have access to review queues other than First Posts and Late Answers so I don't know what that's like.

user116211

@pentavalentcarbon 3. They think the maths problem related to physics can be asked at Phys.SE.

user116211

@pentavalentcarbon It's good that you participate in the task of reviewing :)

3:25 PM

@MAFIA36790 Well, I could see that being relevant if you need domain-specific knowledge from the physics problem to understand the math problem.

@MAFIA36790 Ah, I never said anything about participating...

roscoe_casita

good morning all =)

!!greet/roscoe_casita

Chemobot

Welcome to The Periodic Table roscoe_casita! Here are our chat guidelines and it's recommended that you read them. If you want to turn Mathjax on, follow the instructions in this answer. Happy chatting!

roscoe_casita

=) Thanks

~I'm a grad student in the CS field... working on undergrad chemistry ;)

3:43 PM

@roscoe_casita What subfield do you study?

@AaronAbraham chemistry.stackexchange.com/questions/59439/…

I was having trouble sleeping, there's your answer..

user116211

4:30 PM

Why the reject , @jan?

user116211

@getafix: Since, I can't edit all the time and not all the time my edit would get accepted, let me advice you on this:

user116211

You should use \tag{ }to number the equation and not \qquad ( ). They both yield different results.

user116211

Also, use \textrm to make the text upright.

Mithoron

Hello. Huh quite a bit of people here

$-1$. Sulphur does not ‘expand its octet’. — Jan 5 mins ago

Well, he's right.

But I've never been trying to clean up the mess from when I was an enthusiastic havoc-wrecking idiot.

@Jan if you feel like it, you can edit my answer and write whatever is correct.

I won't judge you. A lot.

Mithoron

4:46 PM

@Rubisco O.O Long time, no see!

And I appreciate the irony of 4949 rep.

@Mithoron Hey, how's it vibratin'

Mithoron

@Rubisco polyharmonically

@MAFIA36790 Most importantly because adding an @ before names in answers is somewhere between irrelevant and bad. And then I wasn’t happy with some of your formatting: I usually do not accept edits that introduce \rm.

@MAFIA36790 Use \mathrm{...} for upright maths text. And \text{...} is shorter than \textrm{...}. To be honest, I didn’t pay attention to equation numbering … maybe I should’ve ^^'

@Jan Then please go and edit everything I edit

@Rubisco I do if I see it ;)

user116211

4:50 PM

@Jan okay; the former seems to be silly; and I was about to remove that; but then suddenly; it came that it has already been rejected. so, there was nothing to do.

@Jan EN GARDE

user116211

@Jan As that of \rm , the whole thing was two words and a \times. So, I thought, it would efficient to use \rm.

user116211

@Jan I know that.

@MAFIA36790 \rm breaks a lot of things

Like my grandma's nonexistent vase

user116211

@Rubisco I do know. But it contained, $volume \times density$

4:52 PM

I'd use \mathrm

user116211

I used \rm; which rendered $\rm volume \times density$

Lol to @getafix for just amending the edits I oversaw (and re-adding the @ 8D)

Jan 'cause it's only a lot of fun to get on your toes

user116211

@Jan hmm. It's a common practice; I never knew it is a bad habit though. But wanted to remove that though.

That might or might not be related to the fact that you're a fun person.

Germany standards

4:55 PM

Well, tbh it's completely superfluous to have an @ there, and until Stack Exchange introduces automatic renaming of @username sequences in posts (which they probably won’t since attributing comments isn’t the intended way) they don’t do anything helpful …

user116211

@Jan That's legit; but as I said, it's a common practice.

I love how none of you tell me which post we're talking about.

user116211

@Rubisco ;P

A: Correct equation for Ionic Conductivity (λ) in Solutions?

@Rubisco Who said you're getting any information? D=

0

Short answer: $\lambda = z \mu F$ is correct. The link provided by @Loong confirms this (page 73 of the document). To add to that I have provided you with a short derivation. Prerequisite reading (so to speak) for definitions of a few terms/notation would be my answers to this question, and this...

@Jan Am I authoritative enough to make that claim?

4:58 PM

Anyway, I'm re-leaving. I really shouldn't have come back into SE just before the end of the day xD

Dreadful time-sink, this place ^^'

user116211

@Jan o/

Hmm, well, the @ debate shows me your nitpicking lever is pulled.

I mean, really?

user116211

Anyways, @Rubisco, you know that Phys.SE is having mod-election?

No

I start to know those things when my typing speed gets back to the not-so-ol' days

user116211

Sep 15 at 12:41, by MAFIA36790

in The h Bar, 15 mins ago, by John Rennie

Apparently we have a Physics SE moderator election coming real soon.

Q: 2016 Moderator Election Q&A - Question Collection

5:07 PM

Give me a linky

I'm too lazy to type

user116211

@Rubisco giving...

user116211

14

Physics is scheduled for an election starting next week, September 26th. In connection with that election, we will be hosting a Q&A here for candidates. This will be an opportunity for members of the community to pose questions to the candidates on the topic of moderation. Participation is compl...

discussion featured election

Only useful comments please :) — Jay 3 mins ago

Yessir mister president

I hate it when that happens

Uhhhhhhhh... welll...

I'm out.

Hey out

I'm not in.

5:19 PM

from rubbing NaCN on hands, to Carnauba wax smoothies

today has just been weird

Haha..

I guess 'wier' is German for 'weird'?

Fluorescence spectroscopy

> The fluorescence spectra were recorded on a Cary Eclipse spectropolarimeter at excitation wavelength of 280 nm. (Does a spectropolarimeter emit some excitation wave?)

oops, it's "spectrofluorimeter"

Or "spectrofluorometer "?

Fluorescence spectroscopy (also known as fluorometry or spectrofluorometry) is a type of electromagnetic spectroscopy that analyzes fluorescence from a sample. It involves using a beam of light, usually ultraviolet light, that excites the electrons in molecules of certain compounds and causes them to emit light; typically, but not necessarily, visible light. A complementary technique is absorption spectroscopy. In the special case of single molecule fluorescence spectroscopy, intensity fluctuations from the emitted light are measured from either single fluorophores, or pairs of fluorophores. Devices...

Or "Fluorescence Spectrophotometer"? Are those three synonymous? O_O

spectrofluorimeter

Noun: spectrofluorimeter ‎(plural spectrofluorimeters)

spectrofluorometer...

spectrofluorometer vs. spectrofluorimeter

@CowperKettle yes

@pentavalentcarbon Thanks!

I'll add it to Anki

also, spectropolarimeter:

> an instrument for determining the extent to which plane-polarized light of various wavelengths is rotated by certain solutions, consisting of a combination of a spectroscope and a polarimeter.

so that quote is describing the fluorescence spectra resulting from excitation with plane polarized light at an incident wavelength of 280 nm.

5:36 PM

@pentavalentcarbon no, that quote is my translation, I missed the difference in the Russian text

It is spectrofluorometer

Ok. Though I will mention it is certainly plausible; the differential absorption of plane-polarized light is what gives us chiral spectroscopies among other things.

It's all Chinese to me.. I did not went as far as light effects in my chemistry studies..

I am a bit biased but I think a basic understanding of spectroscopy is crucial to understanding chemistry.

Though I don't understand chemistry so take that with a grain of salt

That may be so. I should read up on spectroscopy.

Even general chemistry textbooks should have an introduction to a few of the most common kinds. UV/vis, infrared, NMR...

5:46 PM

@Loong, you're right, @getafix came up with an amazing answer! I'm glad I didn't delete that question.... chemistry.stackexchange.com/questions/59439/…

:-)