Information om | Engelska ordet OXYGENS

Exempel på hur man kan använda OXYGENS i en mening

• 01 daltons; it consists of one central carbon atom surrounded by three oxygen atoms in a trigonal planar arrangement, with a hydrogen atom attached to one of the oxygens.
• This charge results from a combination formal charge in which each of the three oxygens carries a − charge, whereas the nitrogen carries a +1 charge, all these adding up to formal charge of the polyatomic nitrate ion.
• Like almost all polymers, protein fold and twist, forming into the secondary structure, which is rigidified by hydrogen bonding between the carbonyl oxygens and amide hydrogens in the backbone, i.
• One of the oxygens of dimethyl thiophosphate in turn forms a double bond with the phosphate and losing its hydrogen which forms water with the hydroxyl on the other side of the thiodiglycol.
• Isomeric "Ψ"-derivatives with the oxygens positioned at the 2,6- positions, and mescaline analogues with the oxygens at 3,5- have also been made, but both are less potent than the corresponding 2,5- isomers.
• The resorcinarene is also the basic structural unit for other molecular recognition scaffolds, typically formed by bridging the phenolic oxygens with alkyl or aromatic spacers.
• The molybdopterin cofactor has a Mo(VI) center, which is bonded to a sulfur from cysteine, an ene-dithiolate from pyranopterin, and two terminal oxygens.
• The invariant Glu or Asp at position 12 provides two oxygens for liganding calcium (bidentate ligand).
• These studies found that, in free enzyme, the zinc coordination number is five; the metal center is coordinated with two imidazole Nδ1 nitrogens, the two carboxylate oxygens of glutamate-72, and a water molecule to form a distorted tetrahedral.
• Additionally, G8, A38, and A9 have been suggested to play roles in the catalysis by deprotonating the 2'-OH of A-1, stabilizing the developing negative charge of the pentacoordinate phosphate oxygens, and protonating the 5'-O leaving group of G+1.
• The Cys1 residue of the TIMP chelates to the catalytic zinc and forms hydrogen bonds with one of the carboxylate oxygens of the catalytic glutamate residue (Glu202, see mechanism below).
• Site-selective reduction of acetals and ketals whose oxygens are inequivalent have been reported—the example below is used in a synthesis of Tamiflu.
• The orientation of the hydroquinone oxygens on both rims of the pillararene allow the macrocycle to exhibit planar chirality.
• One nitrate is bonded with two oxygens to the aluminium (bidentate), and the other five oxygen atoms only link via one oxygen (monodentate).
• Benzofurans are similar in structure to MD(M)A but differ in that the methylenedioxy groups have been modified, removing one of the two oxygens in the methylenedioxy ring to render a benzofuran ring.

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