Charge–dipole interactions in G-quadruplex thrombin-binding aptamer

2018 ◽  
Vol 20 (32) ◽  
pp. 21068-21074 ◽  
Author(s):  
Hyun Woo Kim ◽  
Young Min Rhee ◽  
Seung Koo Shin
Keyword(s):  
Hydrogen Bonding ◽  
Dipole Interaction ◽  
Dipole Interactions ◽  
G Quadruplex

As the charge increases, the charge–dipole interaction becomes stronger and distorts the planar G-tetrad geometry formed by hydrogen bonding.

scholarly journals Liquid structure of dibutyl sulfoxide

2016 ◽  
Vol 18 (23) ◽  
pp. 15980-15987 ◽  
Author(s):  
Fabrizio Lo Celso ◽  
Bachir Aoun ◽  
Alessandro Triolo ◽  
Olga Russina
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Structure ◽  
Dipole Interactions

Liquid DBSO shows mesoscopic polar/apolar alternation. Dipole–dipole interactions are responsible for correlations between DBSO molecules that do not interact through hydrogen bonding.

scholarly journals Selective recognition of human telomeric G-quadruplex with designed peptide via hydrogen bonding followed by base stacking interactions

RSC Advances ◽  
2019 ◽  
Vol 9 (69) ◽  
pp. 40255-40262 ◽  
Author(s):  
Shikhar Tyagi ◽  
Sarika Saxena ◽  
Nikita Kundu ◽  
Taniya Sharma ◽  
Amlan Chakraborty ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Synthetic Peptide ◽  
High Selectivity ◽  
Selective Recognition ◽  
Stacking Interactions ◽  
Base Stacking ◽  
Double Stranded Dna ◽  
G Quadruplex ◽  
Guanine Base

A new synthetic peptide is presented. A Glu residue binds through H-bonding to a guanine-base and a Trp residue intercalates with K+ resulting in stabilization of a human telomeric G-quadruplex with high selectivity over a complementary c-rich strand and double-stranded DNA.

Effect of Hydrogen Bonding Ability, Dipole-Dipole Interactions and Viscosity of Extracellular Matrix Fluid on the Bone Mechanical Behavior

2012 ◽  
Author(s):  
Jitin Samuel ◽  
Cong-Gui Zhao ◽  
Bijay Giri ◽  
Debarshi Sinha ◽  
Xiaodu Wang
Keyword(s):  
Extracellular Matrix ◽  
Hydrogen Bonding ◽  
Mechanical Behavior ◽  
Fragility Fracture ◽  
Fragility Fractures ◽  
Functional Relationships ◽  
Dipole Interactions ◽  
Morbidity Cost

Fragility fracture as a mode of pathologic failure in bone is a major healthcare concern and has adverse consequences with respect to morbidity, cost and to a lesser extent mortality. Understanding the structure/composition and functional relationships among the bone constituents is an important step towards prevention/treatment of fragility fractures.

Magnetic dipole interactions in dysprosium ethyl sulphate - I. Susceptibility and specific heat between 20 and 1°K

1959 ◽  
Vol 252 (1269) ◽  
pp. 246-259 ◽  
Keyword(s):  
Specific Heat ◽  
Magnetic Dipole ◽  
Ground State ◽  
Optical Rotation ◽  
Dipole Interaction ◽  
Crystal Axis ◽  
Dipole Interactions ◽  
Degenerate Ground State ◽  
Magnetic Ions ◽  
Good Agreement

Measurements have been made of the magnetic susceptibility and the magnetic contributions to the specific heat of dysprosium ethyl sulphate, at temperatures between 20 and 1°K. It is shown that below about 3°K these properties, and also the earlier optical rotation measure­ments of Becquerel et al ., can be accounted for satisfactorily in terms of a doubly degenerate ground state of the magnetic ions, with spectroscopic splitting factors parallel and perpen­dicular to the crystal axis g 1 = 10.8 and g ┴ = 0, together with an unusually strong coupling between the ions arising from magnetic dipole-dipole interaction. The effect of other inter­actions is shown to be small. Because of this, and the extreme anisotropy of the g -tensor, the properties of this substance at very low temperatures (~ 0.1°K) should closely resemble those of a classical Ising model with known, dipolar forces between the ions. At temperatures above 3°K other states of the ions become populated and it is shown that the first of these lies at an energy of (23 ± 3) k , in good agreement with other experiments.

scholarly journals Potential of Kale and Lettuce Residues as Natural Adsorbents of the Carcinogen Aflatoxin B1 in a Dynamic Gastrointestinal Tract-Simulated Model

Toxins ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 771
Author(s):  
Alma Vázquez-Durán ◽  
María de Jesús Nava-Ramírez ◽  
Daniel Hernández-Patlán ◽  
Bruno Solís-Cruz ◽  
Víctor Hernández-Gómez ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Gastrointestinal Tract ◽  
Aflatoxin B1 ◽  
Electrostatic Interactions ◽  
Hydrophobic Interactions ◽  
Maximum Adsorption Capacity ◽  
Promising Alternative ◽  
Simulated Model ◽  
Dipole Interactions ◽  
Natural Adsorbents

Adsorption of the carcinogen aflatoxin B1 (AFB1) onto agro-waste-based materials is a promising alternative over conventional inorganic binders. In the current study, two unmodified adsorbents were eco-friendly prepared from kale and lettuce agro-wastes. A dynamic gastrointestinal tract-simulated model was utilized to evaluate the removal efficiency of the sorptive materials (0.5%, w/w) when added to an AFB1-contaminated diet (100 µg AFB1/kg). Different characterization methodologies were employed to understand the interaction mechanisms between the AFB1 molecule and the biosorbents. Based on adsorption results, the biosorbent prepared from kale was the best; its maximum adsorption capacity was 93.6%, which was significantly higher than that of the lettuce biosorbent (83.7%). Characterization results indicate that different mechanisms may act simultaneously during adsorption. Non-electrostatic (hydrophobic interactions, dipole-dipole interactions, and hydrogen bonding) and electrostatic interactions (ionic attractions) together with the formation of AFB1-chlorophyll complexes appear to be the major influencing factors driving AFB1 biosorption.

scholarly journals Structure of Simple Dipolar Water-Like Fluids: Primitive Model and Hard Tetrahedra

2021 ◽  
Vol 9 ◽  
Author(s):  
I. Nezbeda
Keyword(s):  
Hydrogen Bonding ◽  
Short Range ◽  
Equations Of State ◽  
Dipole Interaction ◽  
Marginal Effect ◽  
Associating Fluids ◽  
Primitive Model ◽  
Bonding Structure ◽  
Bonding Interaction ◽  
Model Fluids

Dipolar versions of two qualitatively different types of simple short range model fluids which exhibit the phenomenon of hydrogen bonding and which could thus serve as a reference in equations of state for associating fluids have been considered: the primitive model of water descending from the TIP4P model and the fluid of hard tetrahedra. The hydrogen bonding structure exhibited by the latter model results from purely repulsive interactions whereas in the first model the “hydrogen bonding interaction” is explicitly incorporated in the model. Since the water molecules bear a strong dipole moment, the effect of the added dipole-dipole interaction on the structure of the two short-range models is therefore examined considering them both in the full and screened dipole-dipole modifications. It is found that the hydrogen bonding structure in the primitive model resulting from the site-site interactions is so strong that the additional dipole-dipole interaction has only a marginal effect on its structure and contributes thus only to the internal energy. On the contrary, even only a weak dipole-dipole interaction destroys the original hydrogen bonding structure of the hard tetrahedron fluid; to preserve it, a screened dipole-dipole interaction has to be used in the equation of state development.

scholarly journals Unusual Effects of Intramolecular Hydrogen Bonds and Dipole Interaction on FTIR and NMR of Some Imines

2019 ◽  
pp. 1-6 ◽  
Author(s):  
Elham Abdalrahem Bin Selim ◽  
Mohammed Hadi Al–Douh
Keyword(s):  
Hydrogen Bonds ◽  
Chemical Shifts ◽  
Dipole Interaction ◽  
Intramolecular Hydrogen Bonds ◽  
X Ray ◽  
X Ray Crystallography ◽  
Dipole Interactions ◽  
Intramolecular Hydrogen

Unusual effects of intramolecular hydrogen bonds and dipole interactions are investigated using FTIR, NMR and X-Ray crystallography analyses of some imines. These phenomena affect both FTIR absorptions and chemical shifts.

The leading role of the steric hindrance effect and dipole–dipole interaction in superlattice nanostructures formed via the assembly of discotic liquid crystals

2018 ◽  
Vol 42 (24) ◽  
pp. 20087-20094 ◽  
Author(s):  
Zhenhu Zhang ◽  
Huanzhi Yang ◽  
Jingze Bi ◽  
Ao Zhang ◽  
Yi Fang ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Steric Hindrance ◽  
Dipole Interaction ◽  
Discotic Liquid Crystals ◽  
Leading Role ◽  
Dipole Interactions

The effect of steric hindrance and dipole–dipole interactions are a prerequisite for the formation of ordered plastic phases.

scholarly journals Binding of quinazolinones to c-KIT G-quadruplex; an interplay between hydrogen bonding and π-π stacking

2019 ◽  
Vol 253 ◽  
pp. 106220 ◽  
Author(s):  
Kiana Gholamjani Moghaddam ◽  
Alex H. de Vries ◽  
Siewert J. Marrink ◽  
Shirin Faraji
Keyword(s):  
Hydrogen Bonding ◽  
Π Stacking ◽  
G Quadruplex
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