noncovalent bonds

noncovalent bonds

[¦nän·kō¦vāl·ənt ′bänd]
(chemistry)
Weak chemical bonds that are electrostatic and hydrophobic in nature, for example, hydrogen bonds; important in determining complex biological structures.
References in periodicals archive ?
This was identical with the results of gel stiffness because weak gels from noncovalent bonds are easier to shrinkage and subsequent expulsion of water.
In this study, HNTs were successfully modified by SDS and BCP (PS-b-P4VP) organic materials via noncovalent bonds. This facilitated the reduction of inherent hydrophilicity of HNTs making them compatible with the PS polymer matrix.
Finally, the SF/SA macromolecules were spontaneous organized into the well-defined network structures by using noncovalent bonds, presenting the layer structure morphology of hybrid scaffolds (Fig.
Chemical alteration of the flake surface through creation of noncovalent bonds with surfactants is used to disperse nanoflakes and to maintain long-term suspension in a variety of liquid solutions.
It may cause physical changes producing protein aggregates through covalent and noncovalent bonds.
The nanoparticles act as multifunctional single units, which form reversible, noncovalent bonds at specific bond angles and organize themselves into a highly ordered polymer.""We developed a new approach that enables a quantitative prediction of the architecture of linear, branched, and cyclic self-assembled nanostructures, their aggregation numbers and size distribution, and the formation of structural isomers."Kumacheva was joined in the research by postdoctoral fellows Kun Liu, Nana Zhao and Wei Li, and former doctoral student Zhihong Nie, along with Professor Michael Rubinstein of the University of North Carolina.
The next level consists of structures held together by noncovalent bonds. These aggregates include the ribosomes, the early coacervates, and the extant cell membranes.
Molecular self-assembly is the spontaneous association of molecules under equilibrium conditions into stable, structurally well-defined aggregates joined by noncovalent bonds [1].
On the contrary, SA is only able to form noncovalent bonds via ionic interactions and hydrogen bonds within the mucus layer.
Different distribution of the benzene rings in the two-dimensional structure of graphene determines the shape, size, edges, and number of layers and additional covalent or noncovalent bonds with other atoms which results in modifications of the electrical or chemical properties of graphene.
However, one of the main disadvantages of these biopolymers is that they are usually used for immobilization of enzymes using noncovalent bonds (mainly entrapment/encapsulation) due to the lack of functionalities.