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bond

 [bond]
the linkage between atoms or radicals of a chemical compound, or the symbol representing this linkage and indicating the number and attachment of the valencies of an atom in constitutional formulas, represented by a pair of dots or a line between atoms, e.g., H—O—H, H—C≡C—H or H:O:H, H:C:::C:H.
coordinate covalent bond a covalent bond in which one of the bonded atoms furnishes both of the shared electrons.
covalent bond a chemical bond between two atoms or radicals formed by the sharing of a pair (single bond), two pairs (double bond), or three pairs of electrons (triple bond).
disulfide bond a strong covalent bond, —S—S—, important in linking polypeptide chains in proteins, the linkage arising as a result of the oxidation of the sulfhydryl (SH) groups of two molecules of cysteine.
high-energy phosphate bond an energy-rich phosphate linkage present in adenosine triphosphate (ATP), phosphocreatine, and certain other biological molecules. On hydrolysis at pH 7 it yields about 8000 calories per mole, in contrast to the 3000 calories yielded by phosphate esters. The bond stores energy that is used to drive biochemical processes, such as the synthesis of macromolecules, contraction of muscles, and the production of the electrical potentials for nerve conduction.
high-energy sulfur bond an energy-rich sulfur linkage, the most important of which occurs in the acetyl-CoA molecule, the main source of energy in fatty acid biosynthesis.
hydrogen bond a weak, primarily electrostatic, bond between a hydrogen atom bound to a highly electronegative element (such as oxygen or nitrogen) in a given molecule, or part of a molecule, and a second highly electronegative atom in another molecule or in a different part of the same molecule.
ionic bond a chemical bond in which electrons are transferred from one atom to another so that one bears a positive and the other a negative charge, the attraction between these opposite charges forming the bond.
peptide bond the —CO—NH— linkage formed between the carboxyl group of one amino acid and the amino group of another; it is an amide linkage joining amino acids to form peptides.

bond

(bond),
chemistry the force holding two neighboring atoms in place and resisting their separation; a bond is electrovalent if it consists of the attraction between oppositely charged groups, or covalent if it results from the sharing of one, two, or three pairs of electrons by the bonded atoms.

bond

(bond) the linkage between atoms or radicals of a chemical compound, or the mark indicating the number and attachment of the valences of an atom in constitutional formulas, represented by a pair of dots or a line between atoms, e.g., H—O—H, H—CtbondC—H or H:O:H, H:C:::C:H.
coordinate covalent bond  a covalent bond in which one of the bonded atoms furnishes both of the shared electrons.
covalent bond  a chemical bond between two atoms or radicals formed by the sharing of a pair (single bond), two pairs (double bond), or three pairs of electrons (triple bond).
disulfide bond  a strong covalent bond, —S—S—, important in linking polypeptide chains in proteins, the linkage arising as a result of the oxidation of the sulfhydryl (SH) groups of two molecules of cysteine.
high energy bond  a chemical bond the hydrolysis of which yields high levels of free energy; it may involve phosphate (high energy phosphate b.) or sulfur (high energy sulfur b.) or other mixed anhydride types of chemical structure.
hydrogen bond  a weak, primarily electrostatic, bond between a hydrogen atom bound to a highly electronegative element in a given molecule and a second highly electronegative atom in another molecule or elsewhere in the same molecule; it is usually represented by three dots, e.g., X—H···Y.
ionic bond  a chemical bond in which electrons are transferred from one atom to another so that one bears a negative and the other a positive charge, the attraction between these opposite charges forming the bond.
peptide bond  a —CO—NH— linkage formed between the carboxyl group of one amino acid and the amino group of another; it is an amide linkage joining amino acids to form peptides.

bond

a strong coulombic force between atoms in a substance due to attraction of ions of opposite charge for each other or of the nuclei for shared electrons. See also coulomb, Coulomb's law.
Chemistry A unit of chemical attraction; the ‘glue’ that maintains the molecules in their 3-D configuration—e.g., O2 has 2 bonds of affinity, which may be graphically represented by a short line or dash
Social medicine A binding force or influence; a cause of union; a uniting tie—e.g., bonds of fellowship

bond

(bond)
chemistry The force holding two neighboring atoms in place and resisting their separation; a bond is electrovalent if it consists of the attraction between oppositely charged groups, or covalent if it results from the sharing of one, two, or three pairs of electrons by the bonded atoms.

bond

  1. the force of mutual attraction that holds atoms together in molecules (see VAN DER WAALS INTERACTIONS and SULPHUR BRIDGE), such as high-energy bonds in ATP, weak hydrogen bonds in DNA, PEPTIDE BONDS and the disulphide bond of proteins.
  2. also called pair bond . The attraction which maintains a male/female relationship, for purposes of breeding, during the life cycle of some animals, mainly warmblooded vertebrates.

bond,

n the attachment between the atoms in a molecule that is determined by the arrangement of electrons in the outer shell of the atom. See also covalent bond and ionic bonding.

bond

(bond)
chemistry the force holding two neighboring atoms in place and resisting their separation.

bond,

n the force that holds two or more units of matter together.
bond, peptide
n.pl the linking mechanisms that bind together the amino acid building blocks of proteins.
bond, primary,
n a chemical bond that requires some change in structure of matter. Primary bonds are ionic, covalent, or metallic.
bond, secondary,
n a physical bond (sometimes called
van der Waals forces) that involves weak interatomic attractions such as variations in physical mass or location of electrical charge.
bond strength,
n the force with which a sealant holds fast to the surface of a tooth.

bond

the linkage between atoms or radicals of a chemical compound, or the symbol representing this linkage and indicating the number and attachment of the valencies of an atom in constitutional formulas, e.g. H−O−H, H−C= C−H and can be represented by a pair of dots between atoms, e.g. H:O:H, H:C:::C:H.

coordinate covalent bond
a covalent bond in which one of the bonded atoms furnishes both of the shared electrons.
covalent bond
a chemical bond between two atoms or radicals formed by the sharing of a pair (single bond), two pairs (double bond) or three pairs of electrons (triple bond).
disulfide bond
a strong covalent bond, −S−S−, important in linking polypeptide chains in proteins, the linkage arising as a result of the oxidation of the sulfhydryl (SH) groups of two molecules of cysteine.
high-energy phosphate bond
an energy-rich phosphate linkage present in adenosine triphosphate (ATP), phosphocreatine and certain other biological molecules. On hydrolysis at pH 7 it yields about 8000 calories per mole, in contrast to the 3000 calories yielded by phosphate esters. The bond stores energy that is used to drive biochemical processes, such as the synthesis of macromolecules, contraction of muscles, and the production of the electrical potentials for nerve conduction.
high-energy sulfur bond
an energy-rich sulfur linkage, the most important of which occurs in the acetyl-CoA molecule, the main source of energy in fatty acid biosynthesis.
human-animal bond
the psychological interdependence between humans and companion animals.
hydrogen bond
a weak, primarily electrostatic, bond between a hydrogen atom bound to a highly electronegative element (such as oxygen or nitrogen) in a given molecule, or part of a molecule, and a second highly electronegative atom in another molecule or in a different part of the same molecule.
ionic bond
a chemical bond in which electrons are transferred from one atom to another so that one bears a positive and the other a negative charge, the attraction between these opposite charges forming the bond.
peptide bond
the −CO−NH− linkage formed between the carboxyl group of one amino acid and the amino group of another; it is an amide linkage joining amino acids to form peptides.
phosphoanhydride bond
a high energy bond present in ATP.
phosphodiester bond
links between nucleotides in nucleic acids.
References in periodicals archive ?
According to Shailesh Dash, the founder and CEO of Dubai-based Al Masah Capital, Saudi Arabia and other countries in the region need to build secondary bond trading platforms to make the market accessible to regional retail investors.
Visible Markets will fundamentally alter the bond market by making secondary bond trading more efficient through direct matching of a community of buyers and sellers in a competitive, highly liquid marketplace," said Robertson.
By enhancing liquidity in an exchange-like online environment for the world of corporate bonds, we can establish an efficient new secondary bond market.
CAIRO: Egypt is close to completing a new legal framework for its secondary bond market and is taking other measures to improve bond trading, outgoing investment minister Mahmoud Mohieldin said on Tuesday.
com is the only system that can provide the enabling platform for creating a continuous, secondary bond market based on electronic trading," added James Kopley, vice president of marketing.
Through its global network, Paribas provides a comprehensive range of products to its corporate and institutional clients in the primary and secondary bond and equity markets, including public and private placements, bond issues, foreign exchange, swaps, options and derivatives.
Egypt has streamlined rules for both corporate and government instruments and hopes to set up a secondary bond market this year.
Through its worldwide network, Paribas provides a comprehensive range of products in the primary and secondary bond and equity markets, including public and private placements, bond issues, foreign exchange, swaps, options and derivatives, to its corporate and institutional clients.
CAIRO: Egypt's Finance Ministry has given its approval for brokerage companies to directly buy government bonds, officials said, a step towards developing a secondary bond market for corporate and state debt.
Through its global network, Paribas provides a comprehensive range of products in the primary and secondary bond and equity markets, including public and private placements, bond issues, foreign exchange, swaps, options, and derivatives, to its corporate and institutional clients.
Government bonds are part of Paribas Capital Markets primary and secondary bond activities which are headed by Cyrus Ardalan.
Obviously, secondary bonds between silica and DR1 have effectively rendered a large portion of the dye molecules unable to orient into an ordered crystalline lattice.