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Polyvinylpyrrolidone (PVP), also commonly called polyvidone or povidone, is a water-soluble polymer compound made from the monomer N-vinylpyrrolidone. [1] PVP is available in a range of molecular weights and related viscosities, and can be selected according to the desired application properties.
alpha. -Pyrrolidinopentiophenone. α-Pyrrolidinopentiophenone (also known as α-pyrrolidinovalerophenone, α-PVP, O-2387, β-keto-prolintane, prolintanone, [ 2][ 3] or desmethylpyrovalerone) is a synthetic stimulant of the cathinone class developed in the 1960s that has been sold as a designer drug and often consumed for recreational reasons ...
Crystal structure of table salt (sodium in purple, chlorine in green) In crystallography, crystal structure is a description of ordered arrangement of atoms, ions, or molecules in a crystalline material. [ 1] Ordered structures occur from intrinsic nature of constituent particles to form symmetric patterns that repeat along the principal ...
In clockwise order; Dousan, Drenchen, Sifa, Stonewood, Spriton, Grottan and Vapra. In the center is the Aureyal, the symbol of Gelfling unity. The Gelfling are the central protagonists of The Dark Crystal franchise. They are slender, elvish humanoids with protracted facial structures who originally populated most of Thra, having three long ...
Rosalind Elsie Franklin (25 July 1920 – 16 April 1958) [ 1] was a British chemist and X-ray crystallographer whose work was central to the understanding of the molecular structures of DNA (deoxyribonucleic acid), RNA (ribonucleic acid), viruses, coal, and graphite. [ 2] Although her works on coal and viruses were appreciated in her lifetime ...
The primitive and cubic close-packed (also known as face-centered cubic) unit cells. In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals . There are three main varieties of these crystals:
Texture mapping. Mapping a two-dimensional texture onto a 3D model. 1: 3D model without textures. 2: Same model with textures. Texture mapping[ 1][ 2][ 3] is a method for mapping a texture on a computer-generated graphic. "Texture" in this context can be high frequency detail, surface texture, or color .
Crystallographic defect. Electron microscopy of antisites (a, Mo substitutes for S) and vacancies (b, missing S atoms) in a monolayer of molybdenum disulfide. Scale bar: 1 nm. [ 1] A crystallographic defect is an interruption of the regular patterns of arrangement of atoms or molecules in crystalline solids.