Results 21 to 30 of about 23,431 (250)

Detection of neutral metastable fragments from collisions with nucleobases [PDF]

open access: yes, 2009
We report on two collision experiments performed on nucleobases, (i) using electron impact on nucleobases in the gas phase, and (ii) using low-energy ion impact of small nucleobase clusters.
Howard, J.   +4 more
core   +1 more source

Probing DNA nucleobases with diamond (111) surfaces

open access: yes, 2023
DNA units, the nucleobases, are probed with diamond (111) surfaces. The nucleobases are placed on top of a diamond surface interacting in a very specific way with the surface atoms.
Putra, Miftahussurur Hamidi, Fyta, Maria
core   +1 more source

Nucleobase Protection of Deoxyribo‐ and Ribonucleosides [PDF]

open access: yesCurrent Protocols in Nucleic Acid Chemistry, 2017
Abstract Oligonucleotides carrying a variety of chemical modifications including conjugates are finding increasing applications in therapeutics, diagnostics, functional genomics, proteomics, and as research tools in chemical and molecular biology.
Geeta, Meher   +2 more
openaire   +5 more sources

Functional Systems Derived from Nucleobase Self‐assembly

open access: yesChemistryOpen, 2020
Dynamic and reversible non‐covalent interactions endow synthetic systems and materials with smart adaptive functions that allow them to response to diverse stimuli, interact with external agents, or repair structural defects.
Dr. Anselmo delPrado   +2 more
doaj   +1 more source

The Transformation by Catalysis of Prebiotic Chemical Systems to Useful Biochemicals: A Perspective Based on IR Spectroscopy of the Primary Chemicals II. Catalysis and the Building of RNA

open access: yesApplied Sciences, 2020
Having found that carbonyl sulfide (COS), works well as a catalyst in the transformation of amino acids to polypeptides, we have now tested COS as a catalyst also for the formation of substances that might be thought of as partners in the building of RNA.
Ragnar Larsson   +2 more
doaj   +1 more source

Photochemistry of Thymine in Protic Polar Nanomeric Droplets Using Electrostatic Embeding TD-DFT/MM

open access: yesMolecules, 2021
Thymine photochemistry is important for understanding DNA photodamage. In the gas phase, thymine undergoes a fast non-radiative decay from S2 to S1. In the S1 state, it gets trapped for several picoseconds until returning to the ground-state S0. Here, we
Miquel Huix-Rotllant
doaj   +1 more source

Microhydration of Deprotonated Nucleobases [PDF]

open access: yesJournal of the American Society for Mass Spectrometry, 2016
Hydration reactions of deprotonated nucleobases (uracil, thymine, 5-fluorouracil,2-thiouracil, cytosine, adenine, and hypoxanthine) produced by electrospray have been experimentally studied in the gas phase at 10 mbar using a pulsed ion-beam high-pressure mass spectrometer.
openaire   +2 more sources

Self-Assembled Structures of Diblock Copolymer/Homopolymer Blends through Multiple Complementary Hydrogen Bonds

open access: yesCrystals, 2018
A poly(styrene-b-vinylbenzyl triazolylmethyl methyladenine) (PS-b-PVBA) diblock copolymer and a poly(vinylbenzyl triazolylmethyl methylthymine) (PVBT) homopolymer were prepared through a combination of nitroxide-mediated radical polymerizations and click
Wei-Chen Su   +3 more
doaj   +1 more source

Coordination Sites for Sodium and Potassium Ions in Nucleophilic Adeninate Contact ion-Pairs: A Molecular-Wide and Electron Density-Based (MOWED) Perspective

open access: yesMolecules, 2022
The adeninate anion (Ade−) is a useful nucleophile used in the synthesis of many prodrugs (including those for HIV AIDS treatment). It exists as a contact ion-pair (CIP) with Na+ and K+ (M+) but the site of coordination is not obvious from spectroscopic ...
Dominique M. S. Buyens   +2 more
doaj   +1 more source

Cymantrenyl-Nucleobases: Synthesis, Anticancer, Antitrypanosomal and Antimicrobial Activity Studies

open access: yesMolecules, 2017
The synthesis of four cymantrene-5-fluorouracil derivatives (1–4) and two cymantrene-adenine derivatives (5 and 6) is reported. All of the compounds were characterized by spectroscopic methods and the crystal structure of two derivatives (1 and 6 ...
Artur Jabłoński   +15 more
doaj   +1 more source

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