Optical rotation of sugars - chirality

  Рет қаралды 122,969

Royal Society Of Chemistry

Royal Society Of Chemistry

Күн бұрын

Пікірлер: 43
@ola171
@ola171 3 жыл бұрын
I've learnt for over 6 years that glucose rotates plane polarized light Right and fructose Left but this is the first time I am actually seeing it! Thank you!
@BHUPINDERSINGH-zo5kd
@BHUPINDERSINGH-zo5kd 5 жыл бұрын
I was so confused before but this video made me clear everything Thank you Sir😇
@Lifesaweb
@Lifesaweb 12 жыл бұрын
thanks for this, you explained this better than my own chemistry teacher
@appleberry9214
@appleberry9214 5 жыл бұрын
Whoa. That was cool. Laevo and dextro rotatory stuff. You made it simple to understand. Great job sir. It's a noble work you do right here.
@namankarn1504
@namankarn1504 6 жыл бұрын
i am so happy 'bout discovering this channel.........thank you so much
@mernaromany531
@mernaromany531 11 жыл бұрын
That's amazing. . I didn't understand now I do Thanks :)
@sarra5802
@sarra5802 Жыл бұрын
u know how time fly it been 11 year since he uploaded this video ,and now i am a first year med student ,if u see this after couples of years bring me back if i am still alife,have a great day and pray for me
@rdtyphon6684
@rdtyphon6684 28 күн бұрын
1:15 is there a good explanation for why this rotation occurs due to chiral molecules, preferably on yt, i probably wont have the time to dig into too many textbooks but ill see if the feynman lrctureshas something
@peacepeace8164
@peacepeace8164 7 жыл бұрын
You explained it in the way I wanted. Awesome 😇 thank you so much.
@johnkodhek1
@johnkodhek1 2 жыл бұрын
Great demonstration. I think I'm starting to understand chirality. Thank you.
@nikolaosvougiouklis6078
@nikolaosvougiouklis6078 2 жыл бұрын
Thank you. I spent a lot of time to see how I could see the rotation of light by sugars.
@ocayaro
@ocayaro 6 жыл бұрын
Great video. Can you say something about how concentrated the solutions should be?
@declan.fleming
@declan.fleming 6 жыл бұрын
The more the better. I usually go for a roughly 50:50 mix of sugar to water by volume (as caster sugar) then warm to speed up dissolution. The more concentrated the solution and the longer the distance the light is passing through, the better Since this video was made I've switched to using a battery operated LED panel as it's getting more and more difficult to get your hands on an OHP. I then page the solutions in sample vials and stand them on top. Students can walk past in smaller classes and look down through the solution. This gives me a long path length so I get a strong effect even if I don't have time to make the most saturated solution
@mahascookingchannel8057
@mahascookingchannel8057 2 ай бұрын
Superb experiment 👏👏
@rishi_d_mango
@rishi_d_mango 7 жыл бұрын
that is a really nice demonstration!!
@prekshagurung
@prekshagurung Жыл бұрын
:0 that was enthralling truly
@bipinkish
@bipinkish 6 жыл бұрын
Where the filter to be placed and moved back and forth?? Please reply dude...
@declan.fleming
@declan.fleming 6 жыл бұрын
Light source -> polariser -> sugar solution -> second polariser -> eye Sorry I didn't see this sooner.
@BlessedchildofSriShiva
@BlessedchildofSriShiva 2 сағат бұрын
i wish if my school taught like this
@Aaron11801
@Aaron11801 11 жыл бұрын
Flemistry
@abpm665
@abpm665 2 жыл бұрын
Usefull
@Milosz_Ostrow
@Milosz_Ostrow 7 жыл бұрын
I'm still no smarter. How is the direction of rotation defined - from the viewpoint of the light source or in the direction of the light source?
@namankarn1504
@namankarn1504 6 жыл бұрын
the deflection of the Light from it's original direction
@Milosz_Ostrow
@Milosz_Ostrow 6 жыл бұрын
+Naman Karn - That's not helpful either, because it doesn't provide a frame of reference. The direction of deflection will vary according to the observer's position relative to the light beam.
@namankarn1504
@namankarn1504 6 жыл бұрын
look from the frame of reference of the light source...the deflection of the beam seen from here..would be the direction of rotation
@declan.fleming
@declan.fleming 6 жыл бұрын
@@Milosz_Ostrow imagine a skipping rope going up and down (rather than around like in the game) The people moving the rope look down the rope and see motion between the 6 o'clock position and the 12 o'clock. If the light wave is rotated it's like they're now moving their hands diagonally so the rope swings between (for example) between the 2 o'clock and 8. Does that help? (incidentally this is somewhat of a simplification... physicists will cringe at this description but it's good enough to explain the phenomena in the video)
@o73venky
@o73venky 4 жыл бұрын
Steve mould anybody??
@sasdagreat8052
@sasdagreat8052 4 жыл бұрын
Steve Mould + actual need for understanding this for a physics exam here
@ManjeetSingh-be4je
@ManjeetSingh-be4je Жыл бұрын
Nice this video I very love did
@TsubakiRan
@TsubakiRan 12 жыл бұрын
:O That was useful, thank you!
@rengoku3658
@rengoku3658 3 жыл бұрын
Mix glucose and fructose and form resimic solution and then pass ppl through it 😊
@orangeinfotainment620
@orangeinfotainment620 3 ай бұрын
very cool
@hermannklein-hessling7612
@hermannklein-hessling7612 5 жыл бұрын
Why does the light rotate in the first place?
@arjunshamsunder5389
@arjunshamsunder5389 11 жыл бұрын
=O in my textbook, it's given that sucrose rotates to the left !
@jrntrfanboii
@jrntrfanboii Жыл бұрын
chemistry confuses me a LOTTTT especially organic chemistry...... nothing makes sense to me I'm just studying it for the sake of clearing my competitive exam and olympiads
@taureankartik4
@taureankartik4 8 жыл бұрын
Why the value of sugar solution is different from that of water
@declan.fleming
@declan.fleming 6 жыл бұрын
Because the sugar solution has the sugar in it :) water is not chiral so did not rotate plane polarised light.
@Anonymous-rb1bt
@Anonymous-rb1bt 7 ай бұрын
Yeah dude you can't use a retort, you need to put the solute directly between the two. Like a sammich
@ponnilavan3709
@ponnilavan3709 3 жыл бұрын
Poga pinda
@user-pj2xd8uo6b
@user-pj2xd8uo6b 3 жыл бұрын
why does he look like a killer
@wholeloteditz2228
@wholeloteditz2228 Жыл бұрын
😂
@sambreena
@sambreena 2 жыл бұрын
Good video and very much explained in it
@KaneLockwood
@KaneLockwood Ай бұрын
Dudd that's so awesome
Reaction of copper with nitric acid
3:01
Royal Society Of Chemistry
Рет қаралды 677 М.
Why Sugar Always Twists Light To The Right - Optical Rotation
18:39
Steve Mould
Рет қаралды 1,3 МЛН
СИНИЙ ИНЕЙ УЖЕ ВЫШЕЛ!❄️
01:01
DO$HIK
Рет қаралды 3,3 МЛН
Une nouvelle voiture pour Noël 🥹
00:28
Nicocapone
Рет қаралды 9 МЛН
Tuna 🍣 ​⁠@patrickzeinali ​⁠@ChefRush
00:48
albert_cancook
Рет қаралды 148 МЛН
Chirality
13:48
MIT OpenCourseWare
Рет қаралды 21 М.
Optical Activity
2:15
Williams College Physics
Рет қаралды 12 М.
Homochirality: Why Nature Never Makes Mirror Molecules
18:32
Steve Mould
Рет қаралды 1,5 МЛН
High Performance Liquid Chromatography HPLC
5:30
Royal Society Of Chemistry
Рет қаралды 1,2 МЛН
Stereochemistry: Enantiomers
7:00
Professor Dave Explains
Рет қаралды 496 М.
Optical activity | Stereochemistry | Organic chemistry | Khan Academy
9:02
Khan Academy Organic Chemistry
Рет қаралды 438 М.
Hybrid Orbitals explained - Valence Bond Theory | Orbital Hybridization sp3 sp2 sp
11:58
Circular Polarization
4:40
uclaphysicsvideo
Рет қаралды 257 М.
СИНИЙ ИНЕЙ УЖЕ ВЫШЕЛ!❄️
01:01
DO$HIK
Рет қаралды 3,3 МЛН