toktam faal rastegar was born in quchan (iran). she completed her b.sc. in chemistry in 2005 from ferdowsi university, mashhad. she was graduated from m.sc. degree in organic chemistry from bu-ali sina university (2008), hamadan, iran. she is currently organic chemistry ph.d student under the supervision of prof. a. khazaei and prof. m.a. zolfigol in department of chemistry at bu-ali sina unive...

The synthesis of the deoxynucleoside derived from the base P, 6H,8H-3,4-dihydro-pyrimido[4,5-c] [4,5-c] [1,2]oxazin-7-one, 2, and its introduction by established phosphoramidite and H-phosphonate chemistry into oligonucleotides is described. The melting transition temperatures (Tm) of a range of heptadecamer duplexes containing P/A and P/G base-pairs are compared with corresponding ones having ...

The base pair stack of double helical DNA has proven to be an effective medium for charge transport. The π-stacked DNA base pairs can mediate charge transport (CT) chemistry over distances as long as 20 nm, and the reaction is exquisitely sensitive to DNA sequence-dependent conformation and dynamics. This sensitivity to perturbations in DNA structure and base pair stacking makes DNA-mediated ch...

Taq DNA polymerases in which the phenylalanine is substituted by a tyrosine at position 667 (Taq F667Y) are members of a new class of DNA polymerases that incorporate chain-terminating dideoxyribonucleoside triphosphates (ddNTPs) much more efficiently than the wild-type Taq DNA polymerase. Improved incorporation of ddNTPs into DNA during cycle sequencing using AmpliTaq DNA polymerase, FS (Taq-F...

In this study, the effect of fullerene electron mobility on the composition of paraphenylenediamine and stability was studied. Using quantum chemistry calculations, the first combination of paraffenylenediamine in a single-full-time region connected with fullerene through carbon atoms was reported. Experimental research was simulated and optimized using GIS software. Then the NBO calculations w...

The description of the geochemical properties of the bentonite backfill that serves as engineered barrier for nuclear repositories is a central issue for performance assessment since these play a large role in determining the fate of contaminants released from the waste. In this study the porewater chemistry of bentonite was assessed with a thermodynamic modelling approach that includes ion exc...

Submitted for the MAR06 Meeting of The American Physical Society A Density Functional Theory Study of the Non-local Correlations between Nucleic Acid Base Pairs VALENTINO R. COOPER, TIMO THONHAUSER, DAVID C. LANGRETH, Rutgers University — The interactions of nucleic acid bases are fundamentally important in determining the behavior and structure of biologically important molecules such as DNA a...

To the article “Synthesis, Characterization and Antiioxidant Activity of Schiff Base Compounds Obtained Using Green Chemistry Techniques,” by K. Sunil, T. P. Prasanna Kumara, B. Arun Kumar, S. Patel, Vol. 55, No. 1, pp. 46-53, April, 2021

This review article presents how nitrogen-centred Lewis bases were modified in order to increase their reactivity in catalytic processes. As examples, we focus on alcohol acylation and Morita-Baylis-Hilman reactions in order to showcase the fundamental parameters at play in transformations initiated by catalysts bearing respectively an active sp(2) or sp(3) nitrogen atoms. These two aspects a...