22years since my school.. First time saw this experiment... I always wondered how this photo was taken and how it lead to the double helix.. I had asked my teacher a curious kid of 10th grade... Only today I got the answer.. Thanks
@winproduction75853 жыл бұрын
Eventhough this clip is like 10 years ago. But very understandable and have a good example. Thank you
@brunothebrowndog2 жыл бұрын
This is such a valuable video. Thank you so much.
@stellasolaria62244 жыл бұрын
Rosalind Franklin really deserve noble prize since works like these and even small have got noble prize like stomach ulser cause finders and etc. I guess, it may be because she is a girl, and if she would have got one, it would have empowered girls.
@stellasolaria62243 жыл бұрын
@@qed100 really, that's new, could you please name a few women awarded with noble prize before Rosalin Franklin 😅 because the source (Ted ed) where I learned about Rosalin Franklin told me that at that time people used to discourage girls from studying and conservative people commented on her (at that time) that a girl working means denial of a person (men)'s denial of job and suffering to a whole household 😅😒😔 please do tell me a few names of women before Rosalin Franklin before being awarded with noble prize, I would love to learn about them too
@canavar74633 жыл бұрын
@@qed100 Actually, Marie Curie has gotten Nobel prizes because of her husband’s character. They have tried to give her husband Pierre Curie a Nobel at first - for the work that actually made by Marie Curie - , but Pierre Curie indicated that he won’t accept the prize if the committee won’t give a prize for her wife too.
@canavar74633 жыл бұрын
@@qed100 And you can see that the first women who get a Nobel prize is Marie Curie, because of a noble-minded men such as Pierre Curie
@canavar74633 жыл бұрын
@@qed100 So Stella is actually right at the point that committee’s perspective on woman scientists back then but of course as you mentioned Rosalind Franklin’s reason for didn’t get a Nobel is different
@jakelawliet35843 жыл бұрын
um actually that is not the only reason she did not receive the prize.... she died of cancer due to playing with radioactivity and so only her boss Wilkins got the prize along with Watson and crick
@pameslinkoln12 жыл бұрын
@donatsu8 - That is correct. The DNA must be very dehydrated. This was one of R. Franklin's talents, getting just the right amount of moisture to get the DNA to take on a crystal structure. Based on how dehydrated it was she was able to get two different DNA crystals (A form and B form - photo 51 is of B form). Also, it helps to take several photographs and wait for luck. There is a reason why its called photo 51; she took over a hundred!
@adogandi11 жыл бұрын
Well done. Bravo!
@donatsu812 жыл бұрын
Hey DNA taken in a test tube will orient in all possible directions unlike your spring. How did she got such a distinct diffraction pattern from DNA molecules ?
@mohamedbabiker66533 жыл бұрын
Crystallization align the molecules in ordered pattern
@wayneoutten80102 жыл бұрын
@@mohamedbabiker6653 I think the images were actually of DNA fibers, not crystals. Basically very thin strings laid across a mount.
@mohamedbabiker66532 жыл бұрын
@@wayneoutten8010 Yes, but it has to crystallize first in order to be imaged by X-ray, the molecules assume ordered structure, regardless of the shape of the sample, it's like sugar cubes, sucrose molecules assume an ordered structure at the nanolevel, wether it's a long box or a circular in the gross level... That's my understanding of the process.
@Monika_gora Жыл бұрын
@@mohamedbabiker6653how can we differentiate between Z- DNA and B- DNA like weather they are right handed or left handed on the basis of X-ray diffraction crystallography ?
@flparg210 жыл бұрын
Very simple and useful. Thank you.
@jaydenarcher36743 жыл бұрын
i know Im quite off topic but does anybody know of a good place to stream new tv shows online?
@garyaxl50563 жыл бұрын
@Jayden Archer Lately I have been using FlixZone. Just search on google for it :)
@oossskim82377 жыл бұрын
thank you!!!!!!!!!!!!!!!!!!! i finally understand the principle ...
@lloydtripp37934 жыл бұрын
Very nice. Great explanation.
@ahmedalvie66173 жыл бұрын
NiCe method of teaching 🥰🥰🥰😘💜sir
@crickerloverwithlove2 ай бұрын
She deserves a nobel prize but not completed her PhD for it😢
@GH-oi2jf5 жыл бұрын
Franklin was not the first to determine that DNA was helical. She initially rejected Crick and Watson’s hypothesis that it was helical. According to Gosling, her student and assistant, she later concluded from her own data that the structure was helical, but by that time Watson and Crick had a complete model
@Muonium12 жыл бұрын
that doesn't fit the narrative of perpetually oppressed whaaamen under the thumb of the evil nasty patriarchy though, and so most people who know anything at all about DNA now simply believe "Franklin discovered the structure of DNA but was robbed of the Nobel Prize because spiteful insecure men hated her for having a vagina" or somesuch garbage. Common historical knowledge is littered with these kinds of politically driven conceits.
@Vain-Voyager Жыл бұрын
Franklin deserves a Nobel Physiology/Medicine Prize like Nicolas Tesla deserves what Thomas Edison took from him.
@donatsu812 жыл бұрын
@pameslinkoln Thank you. Makes sense. Are diffraction studies done when molecule is in form of crystal?
@pameslinkoln12 жыл бұрын
@donatsu8 Getting a crystal structure is important for measuring objects that have repeating structures like DNA or proteins; generally it is necessarily. But if you watch our video on Diffraction you can see that almost any object can cause diffraction!
@pameslinkoln11 жыл бұрын
No, its the opposite. Gamma Rays will have more penetrating power. Gamma rays should get through bone and require lots of material to obstruct or diffract them. In the video I don't have time to explain it but the more electrons a nucleus has around it, the more it blocks/diffracts x-rays. It's not the nuclei themselves that are blocking the x-rays.