If there are two strands of DNA and they orient their polarities in opposite directions (antiparallel) to each other, their bases can interact and H-bond to each other--but only under one strict rule.
Individually, each H-bond formed is quite weak, but when a number of them occur in series such as between two complementary strands the effect is additive and the result is a non-covalent but strong net force holding the strands together.
Estimation the Enthalpy Gap of the Two Kinds of H-bond Dissociation
In this article, two kinds of H-bond are mainly analyzed which can transform from each other.
This is attributed to the polymer's conformation restricting the optimized H-bond geometry, especially in the chain's interior.
Here the H-bonded site is preferred because the carbonyl carbon has increased positive character due to electrons being withdrawn by the H-bond (Fig.
a nitro or cyano); and b) an aryl-amide linkage to a carbon hosting a strong H-bond donor group at the opposite terminus of the ligand (see, e.
Fenitrothion has apparent structural similarities with the pharmaceutical antiandrogen flutamide and the environmental antiandrogens vinclozolin and linuron (Figure 2) but differs most significantly in having a thiophosphonyl group as a proposed H-bond acceptor in the D-ring region of the AR interaction site.
The main object of this work is to investigate H-bond formed on the surface of unmodified AT and the corresponding dynamic mechanical and crystalline properties of the nanocornposite.
The H-bond effect on the dynamic mechanical properties and crystallization behavior of the nanocomposites were subsequently studied by dynamic mechanical analysis (DMA) and wide-angle X-ray diffraction (XRD), respectively.
Lowis adds, "Visualization enhancements and capabilities include interaction surfaces (Lee & Richards surface); H-bond
and hydrophobic surface color trait; and enhanced isosurface generation and usability, especially for electron density maps.
In poly (DGEBA-co-HAn-azo-HNAB), containing two hydroxyl groups on one chromophore, the trans configuration of the azo unit can be stabilized by a double H-bond
array (see Fig.
The current list of available plugins includes; pKa, logP, logD, polar surface area (PSA), charge distribution, polarizability prediction, H-bond
acceptor/donor, major microspecies, refractivity and Huckel analysis.
This may mean that all the N--H groups form the H-bond
with O, N, and Cl.
were attributed to the C=O free and H-bond
(C=O) urethane, respectively [11, 25] and that at 3345 [cm.