The contribution of hydrogen bonds to bulk and surface thermodynamic properties of dimethylsulfoxide–water mixtures

1989 ◽  
Vol 91 (6) ◽  
pp. 3603-3613 ◽  
Author(s):  
A. Luzar
Keyword(s):  
Hydrogen Bonds ◽  
Thermodynamic Properties

scholarly journals DNA/TNA Mesoscopic Modeling of Melting Temperatures Suggest Weaker Hydrogen Bonding of CG than in DNA/RNA

2020 ◽  
Author(s):  
Maria Izabel Muniz ◽  
Hershel Lackey ◽  
Jennifer Heemstra ◽  
Gerald Weber
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Thermodynamic Properties ◽  
Stacking Interactions ◽  
Base Pairs ◽  
Melting Temperatures ◽  
Mesoscopic Modeling ◽  
Bond Strengths ◽  
Purine Pyrimidine

TNA/DNA hybrids share several similarities to RNA/DNA, such as the tendency to form A-type helices and a strong dependency of their thermodynamic properties on purine/pyrimidine ratio. However, unlike RNA/DNA, not much is known about the base-pair properties of TNA. Here, we use a mesoscopic analysis of measured melting temperatures to obtain an estimate of hydrogen bonds and stacking interactions. Our results reveal that the AT base pairs in TNA/DNA have nearly identical hydrogen bond strengths than their counterparts in RNA/DNA, but surprisingly CG turned out to be much weaker despite similar stability.

scholarly journals A study of the ir spectra of the copigments of malvin chloride with organic acids

2001 ◽  
Vol 66 (7) ◽  
pp. 451-462 ◽  
Author(s):  
Jasmina Dimitric-Markovic ◽  
Ubavka Mioc ◽  
Jelisavetam Baranac ◽  
Zoran Nedic
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Thermodynamic Properties ◽  
Organic Acids ◽  
Ir Spectra ◽  
Infrared Spectra ◽  
Molecular Structures ◽  
Oxonium Ions ◽  
Hydroxy Groups ◽  
Formed Hydrogen

The infrared spectra of the copigments of malvin with several organic acids: caffeic, ferulic, sinapic, chlorogenic, and tannic, were analyzed in order to elucidate the bonding of the molecules in the copigments. It was established that copigmentation is realized through hydrogen bonding between malvin molecules and the acids under study. The infrared spectra reveal that two groups of hydrogen bonds are formed, which include interactions of different molecular structures: hydroxy groups (bands around 3500 cm-1) and oxonium ions of the molecules (bands below 3000 cm-1). The formed hydrogen bonds were found to be of different strengths. The strengths of the hydrogen bonds were tentatively correlated with thermodynamic properties of the corresponding copigmentation reactions.

scholarly journals DNA/TNA Mesoscopic Modeling of Melting Temperatures Suggest Weaker Hydrogen Bonding of CG than in DNA/RNA

2020 ◽  
Author(s):  
Maria Izabel Muniz ◽  
Hershel Lackey ◽  
Jennifer Heemstra ◽  
Gerald Weber
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Thermodynamic Properties ◽  
Stacking Interactions ◽  
Base Pairs ◽  
Melting Temperatures ◽  
Mesoscopic Modeling ◽  
Bond Strengths ◽  
Purine Pyrimidine

TNA/DNA hybrids share several similarities to RNA/DNA, such as the tendency to form A-type helices and a strong dependency of their thermodynamic properties on purine/pyrimidine ratio. However, unlike RNA/DNA, not much is known about the base-pair properties of TNA. Here, we use a mesoscopic analysis of measured melting temperatures to obtain an estimate of hydrogen bonds and stacking interactions. Our results reveal that the AT base pairs in TNA/DNA have nearly identical hydrogen bond strengths than their counterparts in RNA/DNA, but surprisingly CG turned out to be much weaker despite similar stability.

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

Use of molecular overlap to predict intermolecular repulsion in N... H-O hydrogen bonds

1998 ◽  
Vol 95 (3) ◽  
pp. 525-537 ◽  
Author(s):  
I. NOBELI S. L. PRICE R. J. WHEATLEY
Keyword(s):  
Hydrogen Bonds
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