Curves | Algebraic curves | Singularity theory
In classical algebraic geometry, a tacnode (also called a point of osculation or double cusp) is a kind of singular point of a curve. It is defined as a point where two (or more) osculating circles to the curve at that point are tangent. This means that two branches of the curve have ordinary tangency at the double point. The canonical example is A tacnode of an arbitrary curve may then be defined from this example, as a point of self-tangency locally diffeomorphic to the point at the origin of this curve. Another example of a tacnode is given by the shown in the figure, with equation (Wikipedia).
Total Synthesis of Tafluprost, a Prostaglandin Analog for Glaucoma and Ocular Hypertension
In this video, we go through the Fletcher group's synthesis of Tafluprost. Parent reference: Org. Lett. 2020, 22, 2991-2994. Other references (in order of appearance): For a review of asymmetric approaches to prostaglandins, see Org. Biomol. Chem. 2017, 15, 6281-6301. For an assignment o
From playlist Total Synthesis
Nitrotetrazoles - Explosions&Fire
Why do we create explosions&fire? Because we got told that we couldn't. Playlist of me making the 5-ATz: https://www.youtube.com/watch?v=VSxj7Lr5xpE&index=7&list=PLnafk93vhO37a9ppaAMQ57j2U04YiYWGp In this video we make the famed tetrazole ring, I talk some boring shit about 'electron withd
From playlist Chemistry of Tetrazoles
NITRATION TIME! Making A Chemical Called Nitrobromobenzene
In this video we are going to nitrate bromobenzene to make nitrobromobenzene. Patreon: https://www.patreon.com/thyzoid Discord: https://discord.gg/UrjAt44HWH (Let me know if the discord link does not work) Instagram: https://www.instagram.com/thyzoyd/?hl=de 🐦 Twitter: https://twitter.com/
From playlist Organic Chemistry
In the world of chemistry, an "organic" compound is often described as anything with carbon in it, and "organic chemistry" is the study of carbon compounds, but there is actually no single definition of what "organic" means in chemistry, and scientists have been arguing about it for a long
From playlist Uploads
Iron - Periodic Table of Videos
Iron and thermite. We have uploaded this video again higher resolution because the previous version was quite low quality. More links in description below ↓↓↓ Support Periodic Videos on Patreon: https://www.patreon.com/periodicvideos A video on every element: http://bit.ly/118elements M
From playlist All Chemical Elements in Order - Periodic Videos
Isocyanogen Tetrabromide from Na Azotetrazole
Bromine rips apart our precious tetrazole groups to form an obscure molecular motif, needed to make the famed C2N14 energetic compound. Following the procedure from here: https://sciencemadness.org/scipics/Energetic_Derivatives_Of_Tetrazole.pdf Explosions&Fire2: https://www.youtube.com/c
From playlist Chemistry of Tetrazoles
What Is Thermosetting and Thermosoftening Polymers | Organic Chemistry | Chemistry | FuseSchool
Learn the basics about thermosetting and thermosoftening polymers, when learning about polymers as a part of organic chemistry. A polymer is a macromolecule made of many monomers, or repeating units. The properties of these polymers depend on a variety of factors – the monomer unit, the
From playlist CHEMISTRY
Ethyl Chloroacetate a Deadly Precursor to Many Pharmaceuticals
In this video ethyl chloroacetate which is a precursor to many pharmaceuticals will be prepared. We will make it by doing an esterification reaction involving chloroacetic acid, ethanol, sulfuric acid and a lot of patience. Ethyl chloroacetate is a toxic liquid used to make chloroacetamide
From playlist Organic Chemistry
We need some of the energetic compound 5-nitrotetrazole, so we make it. What could possibly go wrong?! (Warning: contains a few moments of high panic) Thanks to ReactiveChem for a good video reference on this: https://www.youtube.com/channel/UC76v7IV2VacsYmQ2DcNMEUg The patent I am follo
From playlist Chemistry of Tetrazoles
Arno Kuijlaars: Tilings of a hexagon and non-hermitian orthogonality on a contour
I will discuss polynomials $P_{N}$ of degree $N$ that satisfy non-Hermitian orthogonality conditions with respect to the weight $\frac{\left ( z+1 \right )^{N}\left ( z+a \right )^{N}}{z^{2N}}$ on a contour in the complex plane going around 0. These polynomials reduce to Jacobi polynomials
From playlist Probability and Statistics
ALLOTROPES - a quick definition
A quick definition of allotropes. Chem Fairy: Louise McCartney Director: Michael Harrison Written and Produced by Kimberly Hatch Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Make a one-time PayPal donation: https://www.payp
From playlist Chemistry glossary