pyran वाक्य
उदाहरण वाक्य
मोबाइल
- The pyran ring of mupirocin is generated in this proposed multistep reaction [ 15 ].
- The formation of the pyran ring requires many enzyme-mediated steps ( Figure 4 ).
- Molydopterin consists of a pyranopterin, a complex heterocycle featuring a pyran fused to a pterin ring.
- In addition, the pyran ring features two thiolates, which serve as ligands in molybdo-and tungstoenzymes.
- Similarly, heterocycles such as pyran, a substituent next to an heteroatom may prefer the axial position due to the anomeric effect.
- The term pyran is also often applied to the saturated ring analog, which is more properly referred to as tetrahydropyran ( oxane ).
- Its structure contains two carboxylic acid groups (-COOH ) and one keto group ( = O ) attached to a pyran ring.
- Wired glass has been replaced with clear Pyran glass to enhance the sense of cross visibility between the perimeter library area and the central atrium.
- "' Benzopyran "'is an polycyclic organic compound that results from the fusion of a benzene ring to a heterocyclic pyran ring.
- It is named by reference to pyran, which contains two double bonds, and may be produced from it by adding four hydrogens to that compound.
- Commonly, benzopyran is encountered in the reduced state, in which it is partially saturated with one hydrogen atom, introducing a tetrahedral CH 2 group in the pyran ring.
- These forms are called furanoses and pyranoses, respectively by analogy with furan and pyran, the simplest compounds with the same carbon-oxygen ring ( although they lack the double bonds of these two molecules ).
- The reaction between C-1 and C-5 creates a molecule with a six-membered ring, called pyranose, after the cyclic ether pyran, the simplest molecule with the same carbon-oxygen ring.
- It was found too unstable, particularly in the presence of air . 4 " H "-pyran easily disproportionates to the corresponding dihydropyran and the pyrylium ion, which is easily hydrolyzed in aqueous medium.
- PA-B production is not removed by these knockouts, demonstrating that PA-B is not created by hydroxylating PA-A . A knockout of mupW eliminated the pyran ring, identifying MupW as being involved in ring formation.
- The epoxide of PA-A at C10-11 is believed to be inserted after pyran formation by a cytochrome P450 such as MupO . A gene knockout of mupO abolished PA-A production but PA-B, which also conatins the C10-C11 epoxide, remained.
- The two glucoses which compose maltose are cyclized in pyran form and are joined by an O-glycosidic bond through the first carbon ( C 1 ) of the first glucose and fourth carbon ( C 4 ) of the second glucose, indicated as ( 1 ?! 4 ).
- Also known as, ( R )-( 3, 5-dihydroxy-6-methyl-tetrahydro-pyran-2-yloxy ) heptanoic acid, this chemical facilitates entrance into the dauer stage of life in which the nematode stops aging to protect the nematodes from adverse environments.
- "' Patulin "': Patulin, 4-hydroxy-4H-furo [ 3, 2c ] pyran-2 ( 6H )-one, is produced by many different molds but was first isolated as an antimicrobial active principle during the 1940s from Penicillium patulum ( later called Penicillium urticae, now Penicillium griseofulvum ).
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