Química Inorgànica i Orgànica: Enviaments recents
Ara mostrant els elements 61-80 de 1012
Structural and magnetic characterization of two tetranuclear Cu(II) complexes with closed‐cubane‐like core framework
Two novel tetranuclear Cu(II) complexes [Cu4(L1)4]·3(H2O) (1) and [Cu4(H2L2)4(H2O)4] (2) ( H2L1 = (E)-2-((1-hydroxybutan-2-ylimino)methyl)phenol; H4L2 = 2-((2-hydroxy-3-methoxybenzylidene)amino)-2-hydroxymethylpropane-1,3-diol) ...
Highly water-stable rare ternary Ag-Au-Se nanocomposites as long blood term X-rays computed tomography contrast agents
X-ray computed tomography (CT) is a powerful and widely used medical non-invasive technique that requires intravenously administration of contrast agents to enhance the sensitivity and visualization of soft tissues. In ...
Evaluation of trypanocidal properties of ferrocenyl and cyrhetrenyl N-acylhydrazones with pendant 5-nitrofuryl group
<p>Four N-acylhydrazones of general formulae [R1-C(O)-NH-N=C(R2)(5-nitrofuryl)] with (R1 = ferrocenyl or cyrhetrenyl and R2 = H or Me) are synthesized and characterized in solution and in the solid-state. Comparative studies ...
Selective Lanthanide Distribution within a Comprehensive Series of Heterometallic [LnPr] Complexes
The preparation of heterometallic, lanthanide-only complexes is an extremely difficult synthetic challenge. By a ligandbased strategy, a complete isostructural series of dinuclear heterometallic [LnPr] complexes has been ...
Identification of Ligands for the Tau Exon 10 Splicing Regulatory Element RNA Using Dynamic Combinatorial Chemistry
We describe the use of dynamic combinatorial chemistry (DCC) to identify ligands for the stem-loop structure located at the exon 10-5'-intron junction of Tau pre-mRNA, which is involved in the onset of several tauopathies ...
Quantum Zermelo problem for general energy resource bounds
A solution to the quantum Zermelo problem for control Hamiltonians with general energy resource bounds is provided. Interestingly, the energy resource of the control Hamiltonian and the control time define a pair of conjugate ...
Polyconductivity in polypyrrole: The correlated electron glass
p-toluensulfonate doped polypyrrole ~PPy!, undergoes an electric-field induced reversible transition from an insulating state to a highly conductive one. The spatially average field can be as small as 200 V/cm, when the ...
Polymerase-catalyzed synthesis of DNA from phosphoramidate conjugates of deoxynucleotides and amino acids
Some selected amino acids, in particular L-aspartic acid (L-Asp) and L-histidine (L-His), can function as leaving group during polymerase-catalyzed incorporation of deoxyadenosine monophosphate (dAMP) in DNA. Although ...
Stereodivergent addition of 4-Silyloxy-1,2-Allenes to aldehydes by hydroboration
We have established a new stereodivergent approach to 2-vinyl-1,3-diols based on a hydroboration of allene/addition of aldehyde tandem process. The stereocenter present next to the allenyl moiety (C1) in the starting allene ...
NMR and computational studies on the reactions of enamines with nitroalkenes that may pass through cyclobutanes
The addition of aldehyde enamines to nitroalkenes affords cyclobutanes in all solvents, with all of the pyrrolidine and proline derivatives tested by us and with all of the substrates we have examined. Depending on the ...
Structure-based design of MptpB inhibitors that reduce multi-drug-resistant mycobacterium tuberculosis survival and infection burden in vivo
Mycobacterium tuberculosis protein-tyrosine-phosphatase B (MptpB) is a secreted virulence factor that subverts antimicrobial activity in the host. We report here the structure-based design of selective MptpB inhibitors ...
The structure of human tRNALys3 anticodon bound to HIV genome is stabilized by modified nucleosides and adjacent mismatch base pairs
Replication of human immunodeficiency virus (HIV) requires base pairing of the reverse transcriptase primer, human tRNA(Lys3), to the viral RNA. Although the major complementary base pairing occurs between the HIV primer ...
El Bagul dels llibres: Comunicació visual en química
El propòsit d'aquesta secció és oferir uns breus apunts sobre llibres particularment interessants que poden proporcionar noves perspectives sobre la química o la ciència en general, encara que no es tracti necessàriament ...
Synthesis of compositionally graded nanocast NiO/NiCo2O4/Co3O4 mesoporous composites with tuneable magnetic properties
A series of mesoporous NiO/NiCo2O4/Co3O4 composites has been synthesized by nanocasting using SBA-15 silica as a hard template. The evaporation method was used as the impregnation step. Nickel and cobalt nitrates in different ...
Universitat i empresa química: un diàleg necessari entre dos mons complementaris
Un diàleg fluid entre les universitats i altres centres de recerca de Catalunya amb el teixit empresarial és, avui dia, una exigència social ineludible. La transferència de coneixement des dels centres de recerca públics ...
Protected maleimide building blocks for the decoration of peptides, peptoids and peptide nucleic acids
Monomers allowing for the introduction of [2,5-dimethylfuran]-protected maleimides into polyamides such as peptides, peptide nucleic acids, and peptoids were prepared, as well as the corresponding oligomers. Suitable ...
Electronic and structural effects of low hapticity coordination of arene rings to transition metals
A DFT computational study and a structural analysis of the coordination of arenes to transition metals in low -hapticity (η1 and η2) modes have been developed, including a pseudosymmetry analysis of the molecular orbitals ...
Long-lived States in an intrinsically disordered protein domain
Long-lived states (LLS) are relaxation-favoured eigenstates of J-coupled magnetic nuclei. LLS were measured, along with classical 1H and 15 N relaxation rate constants, in aminoacids of the N-terminal Unique domain of the ...
Discovery of non-nucleoside inhibitors of HIV-1 reverse transcriptase competing with the nucleotide substrate
How odd! A new class of non-nucleoside reverse transcriptase inhibitors with a 6-vinylpyrimidine scaffold (1) has been found to inhibit HIV-1 reverse transcriptase (RT) by competition with the nucleotide substrate after ...
Four new families of polynuclear Zn-Ln coordination clusters. Synthetic, topological, magnetic, and luminescent aspects
The employment of three structurally related Schiff bases H(2)L1, H(2)L2, and H(3)L3 with zinc and lanthanide salts under various reaction conditions, gave four families of compounds formulated as [Zn(2)(II)Ln(2)(III)(L1 ...
