Results 51 to 60 of about 279,326 (208)

A eubacterial origin for the human tRNA nucleotidyltransferase? [PDF]

open access: yes, 2001
tRNA CCA-termini are generated and maintained by tRNA nucleotidyltransferases. Together with poly(A) polymerases and other enzymes they belong to the nucleotidyltransferase superfamily.
Aebi M.   +12 more
core   +1 more source

Crystal structure of 1-[(1-methyl-5-nitro-1H-imidazol-2-yl)methyl]pyridinium iodide

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title salt, C10H11N4O2+·I−, the asymmetric unit consists of a pyridinium cation bearning a (1-methyl-5-nitro-1H-imidazol-2-yl)methyl group at the N position and an iodide anion.
Roumaissa Belguedj   +4 more
doaj   +1 more source

1-Propyl-4(5)-Methylimidazole Isomers for Temperature Swing Solvent Extraction

open access: yesMolecules, 2022
Temperature swing solvent extraction (TSSE) utilizes an amine solvent with temperature-dependent water solubility to dissolve water at a lower temperature to concentrate or crystallize the brine and the phases are separated.
Shuai Qian   +4 more
doaj   +1 more source

BioNanoAdhesion: atomic force microscopy study of the electrostatic properties of pyridine-and imidazole-based polycationic surfaces [PDF]

open access: yes, 2003
Self-assembled monolayers of pyridine- and imidazole-based disulfides are currently being produced on low roughness gold surfaces. The electrostatic interaction between these surfaces and an atomic force microscope cantilever, modified with a silica ...
Bowen, J.   +4 more
core  

Synthesis and Characterization of Some New 4-Methyl-5-Imidazole Carbaldehyde Derivatives

open access: yesJournal of the Turkish Chemical Society, Section A: Chemistry, 2019
Imidazole is a common and important heterocyclic fragment of many biologically important molecules. 5-imidazole-carbaldehydes containing mono- (N-1) methyl (or aryl) analogs are commonly used as building blocks in medical chemistry.
Ersin Orhan   +3 more
doaj  

Peptide-Gold Nanoparticle Conjugates as Artificial Carbonic Anhydrase Mimics [PDF]

open access: yes, 2019
We herein describe the design and synthesis of a catalytically active peptide–gold nanoparticle conjugate (Pep-Au-NP) that binds Zn(II) within its peptide monolayer and develops carbonic anhydrase activity. Specifically, a modified variant of the β-sheet
Koksch, Beate, Mikolajczak, Dorian J.
core   +1 more source

Antitumor Activity of Pt(II), Ru(III) and Cu(II) Complexes

open access: yesMolecules, 2020
Metal complexes are currently potential therapeutic compounds. The acquisition of resistance by cancer cells or the effective elimination of cancer-affected cells necessitates a constant search for chemical compounds with specific biological activities ...
Katarzyna Gałczyńska   +2 more
doaj   +1 more source

Theoretical study on the mechanism of the cycloaddition reaction between ketenimine and hydrogen cyanide [PDF]

open access: yesJournal of the Serbian Chemical Society, 2016
The cycloaddition reaction mechanism between interstellar molecules ketenimine and HCN has been investigated employing the second-order Møller-Plesset perturbation theory (MP2) method in order to better understand the reactivity of nitrogenous ...
He Wenxing   +3 more
doaj   +1 more source

Two-dimensional protein crystallization via metal-ion coordination by naturally occurring surface histidines [PDF]

open access: yes, 1996
A powerful and potentially general approach to the targeting and crystallization of proteins on lipid interfaces through coordination of surface histidine residues to lipid-chelated divalent metal ions is presented.
Arnold, Frances H.   +7 more
core   +1 more source

Control of hierarchical polymer mechanics with bioinspired metal-coordination dynamics. [PDF]

open access: yes, 2015
In conventional polymer materials, mechanical performance is traditionally engineered via material structure, using motifs such as polymer molecular weight, polymer branching, or block copolymer design.
Barrett, Devin G   +7 more
core   +2 more sources

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