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Electroweak force

Deterministic and stochastic processes should be taken into account. The deterministic scenario invokes transfer of the intrinsic chirality of the universe to the biopolymers of life [6,7]. Ab initio theoretical estimates that take into account the chiral electroweak forces indicate that the L-amino acids and the D-sugars are more stable than their corresponding enantiomers [8,9]. The minute energy differences between these enantiomeric pairs, under Darwinian reaction kinetics in a flow reactor, were invoked to account for the biomolecular handedness that arose when fife began [7]. Several reports describing deterministic mechanisms that could have induced mirror sym-... [Pg.124]

The modem theory of creation begins at Planck time (10-43 seconds) when the universe was very hot and supersymmetric. As the universe cooled supersymmetry was spontaneously-broken into the Poincarfe symmetry (gravity) and the grand symmetry, SU(5) (the grand force). On further cooling SU(5) was spontaneously broken into the electroweak force SU(2) U(1) and the strong force... [Pg.68]

In the rivalry between the D- and L-enan-tiomers of protein and nucleic acid pattern constituents as well as in their chiral amplifications into larger supramolecular motifs, the less fortunate enantiomers, energetically discriminated by the chiral instruction of the electroweak force, fought a losing battle from the beginning of the grand evolutionary competition [31]. Ab initio... [Pg.407]

Although derived in the context of biomolecular handedness, this formula is generally valid for any system that breaks a two-fold symmetry, such as mirror inversion. Using this formula, it is possible to understand the extraordinary sensitivity of bifurcation to small systematic biases that favor one enantiomer by increasing its production rate. For example, it can be estimated that the chiral asymmetry of the electroweak interaction can create differences of the order of one part in 10 between the enantiomers. Application of the above theory shows that if the autocatalytic production rate of the chiral molecules is faster than the racemization rates, then for a period in the range 10" to 10 years, the enantiomer favored by the electroweak force will dominate [16]. For such a scenario, there is currently no experimental evidence to show us how chiral autocatalysis with the required properties can originate in prebiotic chiral molecules. [Pg.438]


See other pages where Electroweak force is mentioned: [Pg.247]    [Pg.12]    [Pg.176]    [Pg.201]    [Pg.202]    [Pg.191]    [Pg.401]    [Pg.401]    [Pg.408]    [Pg.409]    [Pg.1048]    [Pg.1110]    [Pg.45]    [Pg.1048]    [Pg.437]    [Pg.96]    [Pg.2460]    [Pg.2460]    [Pg.2467]    [Pg.2468]    [Pg.108]   
See also in sourсe #XX -- [ Pg.96 ]




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Electroweak

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