Molecular mechanical models for organic and biological systems going beyond the atom centered two body additive approximation: aqueous solution free energies of methanol and N-methyl acetamide, nucleic acid base, and amide hydrogen bonding and chloroform/water partition coefficients of the nucleic acid bases

2001 ◽  
Vol 22 (10) ◽  
pp. 1048-1057 ◽  
Author(s):  
Piotr Cieplak ◽  
James Caldwell ◽  
Peter Kollman
Keyword(s):  
Aqueous Solution ◽  
Nucleic Acid ◽  
Partition Coefficients ◽  
Amide Hydrogen ◽  
Free Energies ◽  
Nucleic Acid Bases ◽  
Acid Base ◽  
Additive Approximation ◽  
Nucleic Acid Base ◽  
Mechanical Models

Structural changes of nucleic acid base in aqueous solution as observed in X-ray absorption near edge structure (XANES)

2014 ◽  
Vol 591 ◽  
pp. 137-141 ◽  
Author(s):  
Hiroyuki Shimada ◽  
Taishi Fukao ◽  
Hirotake Minami ◽  
Masatoshi Ukai ◽  
Kentaro Fujii ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nucleic Acid ◽  
Structural Changes ◽  
Acid Base ◽  
Edge Structure ◽  
X Ray ◽  
Nucleic Acid Base ◽  
X Ray Absorption

scholarly journals Interactions of Thymine and Uracil with Copper, Cobalt and Silver Ferrocyanides and the Implications in Chemical Evolution

2020 ◽  
pp. 31-43
Author(s):  
Davendradat Doodnauth ◽  
Brij Bhushan Tewari
Keyword(s):  
Nucleic Acid ◽  
Metal Complexes ◽  
Chemical Evolution ◽  
Uv Absorbance ◽  
Nucleic Acid Bases ◽  
Acid Base ◽  
Neutral Ph ◽  
Nucleic Acid Base ◽  
Nucleic Bases ◽  
Ph Range

Effects on pH based adsorption of nucleic acid bases (thymine and uracil) at two different concentrations 1 x 10-4 M and 1 x 10-5 M on copper, cobalt and silver ferrocyanides were studied over a pH range (1.0 – 10.0) at temperature 30±1ºC. The progress of adsorption was followed spectrophotometrically by measuring the UV absorbance of the nucleic acid base solutions at their corresponding max. Maximum adsorptions were found at neutral pH for both thymine and uracil.  Effects of concentrations on adsorption of thymine and uracil on copper, cobalt and silver ferrocyanides were studied in a concentration range 10-4 – 10-5 M at neutral pH 7.0 ± 0.1 and at temperature 30±1°C. The interaction followed the Langmuir type of adsorption in general in the concentration range of 10-4 to 10-5 M of thymine and uracil solution. The uptake of nucleic bases on metal ferrocyanides followed the order of CuFc > AgFc > CoFc for the adsorption of thymine and CuFc > CoFc > AgFc for the adsorption of uracil. Effects of the presence of salts on the adsorption of thymine and uracil on metal ferrocyanides also had been studied. The insoluble metal ferrocyanides’ interaction with biomolecules must have either formed metal complexes or could have enhanced the formation of biopolymers in fluctuating environment.

Finding and visualizing nucleic acid base stacking

1996 ◽  
Vol 14 (1) ◽  
pp. 6-11 ◽  
Author(s):  
H.A. Gabb ◽  
S.R. Sanghani ◽  
C.H. Robert ◽  
C. Prévost
Keyword(s):  
Nucleic Acid ◽  
Base Stacking ◽  
Acid Base ◽  
Nucleic Acid Base
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