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Dextrorotary
Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. Circular birefringence and circular dichroism are the manifestations of optical activity. Optical activity occurs only in chiral materials, those lacking microscopic mirror symmetry. Unlike other sources of birefringence which alter a beam's state of polarization, optical activity can be observed in fluids. This can include gases or solutions of chiral molecules such as sugars, molecules with helical secondary structure such as some proteins, and also chiral liquid crystals. It can also be observed in chiral solids such as certain crystals with a rotation between adjacent crystal planes (such as quartz) or metamaterials. When looking at the source of light, the rotation of the plane of polarization may be either to the right (dextrorotatory or d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laevo-
Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. Circular birefringence and circular dichroism are the manifestations of optical activity. Optical activity occurs only in chiral materials, those lacking microscopic mirror symmetry. Unlike other sources of birefringence which alter a beam's state of polarization, optical activity can be observed in fluids. This can include gases or solutions of chiral molecules such as sugars, molecules with helical secondary structure such as some proteins, and also chiral liquid crystals. It can also be observed in chiral solids such as certain crystals with a rotation between adjacent crystal planes (such as quartz) or metamaterials. When looking at the source of light, the rotation of the plane of polarization may be either to the right (dextrorotatory o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Levo-
Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization (waves), polarization about the optical axis of linear polarization, linearly polarized light as it travels through certain materials. Circular birefringence and circular dichroism are the manifestations of optical activity. Optical activity occurs only in chiral materials, those lacking microscopic mirror symmetry. Unlike other sources of birefringence which alter a beam's state of polarization, optical activity can be observed in fluids. This can include gases or solutions of chirality (chemistry), chiral molecules such as sugars, molecules with helical secondary structure such as some proteins, and also Liquid crystal#Chiral phases or twisted nematics, chiral liquid crystals. It can also be observed in chiral solids such as certain crystals with a rotation between adjacent crystal planes (such as quartz) or Metamaterial#Chiral, metama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dextro-
Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. Circular birefringence and circular dichroism are the manifestations of optical activity. Optical activity occurs only in chiral materials, those lacking microscopic mirror symmetry. Unlike other sources of birefringence which alter a beam's state of polarization, optical activity can be observed in fluids. This can include gases or solutions of chiral molecules such as sugars, molecules with helical secondary structure such as some proteins, and also chiral liquid crystals. It can also be observed in chiral solids such as certain crystals with a rotation between adjacent crystal planes (such as quartz) or metamaterials. When looking at the source of light, the rotation of the plane of polarization may be either to the right (dextrorotatory o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiral
Chirality () is a property of asymmetry important in several branches of science. The word ''chirality'' is derived from the Greek language, Greek (''kheir''), "hand", a familiar chiral object. An object or a system is ''chiral'' if it is distinguishable from its mirror image; that is, it cannot be wikt:superpose, superposed (not to be confused with wikt:superimpose, superimposed) onto it. Conversely, a mirror image of an ''achiral'' object, such as a sphere, cannot be distinguished from the object. A chiral object and its mirror image are called ''enantiomorphs'' (Greek, "opposite forms") or, when referring to molecules, ''enantiomers''. A non-chiral object is called ''achiral'' (sometimes also ''amphichiral'') and can be superposed on its mirror image. The term was first used by Lord Kelvin in 1893 in the second Robert Boyle Lecture at the Oxford University Junior Scientific Club which was published in 1894: Human hands are perhaps the most recognized example of chirality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereoisomer
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. This contrasts with structural isomers, which share the same molecular formula, but the bond connections or their order differs. By definition, molecules that are stereoisomers of each other represent the same structural isomer. Enantiomers Enantiomers, also known as optical isomers, are two stereoisomers that are related to each other by a reflection: they are mirror images of each other that are non-superposable. Human hands are a macroscopic analog of this. Every stereogenic center in one has the opposite configuration in the other. Two compounds that are enantiomers of each other have the same physical properties, except for the direction in which they rotate polarized light and how they interact with different enantiomers of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polarimeter (Optical Rotation)
A polarimeter is a scientific instrument used to measure optical rotation: the angle of rotation caused by passing linearly polarized light through an Optical activity, optically active substance. Some chemical substances are optically active, and linearly polarized (uni-directional) light will rotate either to the left (counter-clockwise) or right (clockwise) when passed through these substances. The amount by which the light is rotated is known as the ''angle of rotation''. The direction (clockwise or counterclockwise) and magnitude of the rotation reveals information about the sample's Chirality (chemistry), chiral properties such as the relative concentration of enantiomers present in the sample. History Polarization by reflection was discovered in 1808 by Étienne-Louis Malus (1775–1812). Measuring principle The ratio, the purity, and the concentration of two enantiomers can be measured via polarimetry. Enantiomers are characterized by their property to rotate the plan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sugar Industry
The sugar industry subsumes the production, Sugar refinery, processing and marketing of sugars (mostly sucrose and fructose). Globally, about 80% of sugar is extracted from sugar cane, grown predominantly in the tropics, and 20% from sugar beet, grown mostly in temperate climate in North America or Europe. Sugar is used for soft drinks, sweetened beverages, convenience foods, fast food, candy, confectionery, baking industry, baked products, and other sweetened foods. Sugarcane is used in the distillation of rum. Several countries Subsidy, subsidize sugar. Globally in 2018, around 185 million tons of sugar was produced, led by India with 35.9 million tons, followed by Brazil and Thailand. There are more than 123 sugar-producing countries, but only 30% of the produce is traded on the international market. Market Sugar subsidies have driven market costs for sugar well below the cost of production. As of 2019, 3/4 of world sugar production is never traded on the open market. Brazi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemistry
Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and chemical compound, compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during chemical reaction, reactions with other chemical substance, substances. Chemistry also addresses the nature of chemical bonds in chemical compounds. In the scope of its subject, chemistry occupies an intermediate position between physics and biology. It is sometimes called the central science because it provides a foundation for understanding both Basic research, basic and Applied science, applied scientific disciplines at a fundamental level. For example, chemistry explains aspects of plant growth (botany), the formation of igneous rocks (geology), how atmospheric ozone is formed and how environmental pollutants are degraded (ecology), the prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dexter
Dexter may refer to: People * Dexter (given name) * Dexter (surname) * Dexter (singer), Brazilian rapper Marcos Fernandes de Omena (born 1973) * Famous Dex, also known as Dexter, American rapper Dexter Tiewon Gore Jr. (born 1993) Places United States * Dexter, Georgia, a town * Dexter, Illinois, an unincorporated community * Dexter, Indiana, an unincorporated community * Dexter, Iowa, a city * Dexter Township, Cowley County, Kansas ** Dexter, Kansas, a city * Dexter, Kentucky, an unincorporated community * Dexter, Maine, a town ** Dexter (CDP), Maine, a census-designated place ** Dexter Regional Airport * Dexter Township, Michigan * Dexter, Michigan, a city located near, though distinct from, Dexter Township * Dexter Township, Mower County, Minnesota ** Dexter, Minnesota, a city * Dexter, Missouri, a city * Dexter, New Mexico, a town * Dexter, New York, a village ** Dexter Marsh * Dexter City, Ohio, a village * Dexter, Oregon, an unincorporated community i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
