Viedma ripening or attrition-enhanced deracemization is a chiral symmetry breaking phenomenon observed in solid/liquid mixtures of enantiomorphous (racemic conglomerate) crystals that are subjected to comminution. It can be classified in the wider area of spontaneous symmetry breaking phenomena observed in chemistry and physics. It was discovered in 2005 by geologist Cristobal Viedma, who used glass beads and a magnetic stirrer to enable particle breakage of a racemic mixture of enantiomorphous sodium chlorate crystals in contact with their saturated solution in water. A sigmoidal (autocatalytic) increase in the solid-phase enantiomeric excess of the mixture was obtained, eventually leading to homochirality, i.e. the complete disappearance of one of the chiral species. Since the original discovery, Viedma ripening has been observed in a variety of intrinsically chiral organic compounds that exhibit conglomerate crystallization and are able to inter-convert in the liquid via racemization reactions. It is also regarded as a potential new technique to separate enantiomers of chiral molecules in the pharmaceutical and fine chemical industries (chiral resolution). (Wikipedia).
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From playlist How It's Made
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From playlist MWRC 2009
Check us out on iTunes! http://dne.ws/1NixUds Please Subscribe! http://testu.be/1FjtHn5 Breasts are for feeding our young but there's another persistent theory that breasts play a larger role in attracting a male counterpart. + + + + + + + + Previous Series: The Birth And De
From playlist Breasts: What They Do, Why We Have Them, And How They Can Change Your Life
Vegan / Vegetarian cooking lesson 2 - Sweet potato rice
In this lesson you learn how to make sweet potato rice - very nutritious!
From playlist Vegan / Vegetarian cooking lessons
What’s Really Inside Kraft Singles And Other Processed Cheeses?
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From playlist Best of Science Insider
Why Some Fruits Won’t Ripen On Your Counter
Thank you to HelloFresh for sponsoring this video! Use code EARTH14 for up to 14 FREE MEALS across your first 5 HelloFresh boxes plus free shipping at https://bit.ly/3vvSdyo Trying to ripen some fruits on your kitchen counter is totally fruitless - here's why. LEARN MORE ************** T
From playlist Food, Farms, & Fish
These Two Young Bushmen Hope for a New Life in the Modern World | Short Film Showcase
In Botswana, two young Bushmen struggle to build their futures in the wake of their people's relocation from their ancestral homeland. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More Short Film Showcase: http://bit.ly/ShortFilmShowcase About Short Film Showcase: The Short Film Showc
From playlist Newest Clips | National Geographic
How Supermarkets get Fruit to Ripen Faster | Earth Lab
Looking at bananas, Jimmy Doherty looks at science to check what substance is the most effective to help fruit ripen faster. Subscribe: http://bit.ly/SubscribeToEarthLab All the best Earth Lab videos http://bit.ly/EarthLabOriginals Best of BBC Earth videos http://bit.ly/TheBestOfBBCEa
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From playlist BIOLOGY: Agriculture
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Visit http://ilectureonline.com for more math and science lectures! http://www.ilectureonline.com/donate https://www.patreon.com/user?u=3236071 We will learn what are alkynes and compare it with alkenes and alkanes. Alkynes have triple bond, is an odorless gas used in welding producing h
From playlist ORGANIC CHEMISTRY CH1 INTRODUCTION
Bananas! They’ve got a long trip from harvest to table, and a lot of science goes into keeping them delicious. This episode was produced in collaboration with and sponsored by Emerson. http://www.emerson.com/ilovestem ---------- Dooblydoo thanks go to the following Patreon supporters -- w
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Nano structured materials-synthesis, properties, self assembly and applications by Prof. A.K. Ganguli,Department of Nanotechnology,IIT Delhi.For more details on NPTEL visit http://nptel.ac.in
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From playlist Random Blender Tests
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From playlist Biology
Episode 2 of 5 Check us out on iTunes! http://dne.ws/1NixUds Please Subscribe! http://testu.be/1FjtHn5 There is a huge variety of alcoholic beverages made from fermenting sweet liquids but none of their complexities come close to wine’s. + + + + + + + + Previous Episode:
From playlist Using Science To Understand Wine
Positive and Negative Feedback Loops
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From playlist AP Biology Video Essentials
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Recipe at: http://ciaprochef.com/grapes/recipe14/ Grapes are the ultimate hand-to-mouth fruit, a wholesome snack that needs no peeling, slicing or coring. But for cooks looking to make an impression, grapes have other traits to exploit. They're juicy, so why not juice them? A fresh grape
From playlist Culinary Institute of America: Cooking Demonstrations | CosmoLearning.org Culinary