Results 251 to 260 of about 6,165,336 (284)

From Small Building Blocks to Complex Molecular Architecture

Organic Letters, 2006
[reaction: see text] We describe a synthesis of a dendrimer-like amphiphile containing a flat rigid core and 12 hydrophobic and hydrophilic arms. We employ a modular approach based on stepwise protection chemistry starting from simple building blocks.
Eugene R, Zubarev, Jun, Xu, Jacob D, Gibson, Arshad, Sayyad   +3 more
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Controlled organization of ZnO building blocks into complex nanostructures

Journal of Colloid and Interface Science, 2006
ZnO complex nanostructure with special mushroom-like morphology was prepared by hydrolysis of zinc acetate dehydrate (Zn(CH3COO)2 2H2O) in water-methanol mixed solvent at 60 degrees C. The formation mechanism was studied using XRD investigation and FE-SEM observation, which showed that the mushroom-like particles were transformed from cauliflower-like ...
Huihu, Wang, Changsheng, Xie, Dawen, Zeng, Zhihong, Yang   +3 more
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Network Motifs: Simple Building Blocks of Complex Networks

Science, 2002
Complex networks are studied across many fields of science. To uncover their structural design principles, we defined “network motifs,” patterns of interconnections occurring in complex networks at numbers that are significantly higher than those in randomized networks.
R, Milo, S, Shen-Orr, S, Itzkovitz, N, Kashtan, D, Chklovskii, U, Alon   +5 more
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Difluorobis(pentafluoroethyl)phosphoranide: A Promising Building Block for Phosphoranidometal Complexes

Inorganic Chemistry, 2021
Despite the fact that different metal tetrafluorophosphoranides, M[PF4] (M = Cs, Ag, K), decompose readily, we successfully enhanced the stability of such species by the replacement of two fluorine atoms with electron withdrawing pentafluoroethyl groups.
Mira Keßler, Hans-Georg Stammler, Beate Neumann, Gerd-Volker Röschenthaler, Berthold Hoge   +4 more
openaire   +3 more sources

Evolving Digital Circuits Using Complex Building Blocks

2010
This work is a study of the viability of using complex building blocks (termedmolecules) within the evolutionary computation paradigm of CGP; extending it to MolCGP. Increasing the complexity of the building blocks increases the design space that is to be explored to find a solution; thus, experiments were undertaken to find out whether this change ...
Paul Bremner, Mohammad Samie, Gabriel Dragffy, Anthony G. Pipe, James Alfred Walker, Andy M. Tyrrell   +5 more
openaire   +1 more source

The neuronal building blocks of the navigational toolkit in the central complex of insects

Current Opinion in Insect Science, 2023
The central complex in the brain of insects is a group of midline-spanning neuropils at the interface between sensory and premotor tasks of the brain. It is involved in sleep control, decision-making and most prominently in goal-directed locomotion behaviors.
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Pyrazine-imide complexes: reversible redox and MOF building blocks

Dalton Transactions, 2015
Stepwise exchange of pyrazine for pyridine, in three bis-heterocycle-based imide ligands, tunes the potential of the [M II/III (ligand) 2 ] 0/+ redox couple, increasing the stability of the M ...
Matthew G, Cowan, Reece G, Miller, Sally, Brooker   +2 more
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Crown ether lanthanide complexes as building blocks for luminescent ternary complexes

Polyhedron, 2003
Lanthanide complexes of the macrocyclic ligands 1,10-diaza-4,7,13,16-tetraoxacyclooctadecane-N,N′-diacetic acid (H2(dacda)) and 1,4,7,10-tetraoxa-13-azacyclopentadecane-13-acetic acid (H(macma)) have been isolated and characterised. The photophysical properties of the red and green emissive, Eu(III) and Tb(III), respectively, complexes have been ...
Magennis, S.W., Craig, J., Gardner, A., Fucassi, F., Cragg, Peter, Robertson, N., Parsons, S., Pikramenou, Z.   +7 more
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The building blocks for specifying communication behavior of complex objects

ACM Transactions on Database Systems, 1996
Communication behavior represents dynamic evolution and cooperation of a group of objects in accomplishing a task. It is an important feature in object-oriented systems. We propose the concept of activity as a basic building block for declarative specification of communication behavior in object-oriented database systems, including the temporal ...
Liu, Ling, Meersman, Robert
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Ylide Ligands as Building Blocks for Bioactive Group 11 Metal Complexes

Chemistry – A European Journal, 2018
AbstractThe reactivity of the phosphonium salt (cyanomethyl)triphenylphosphonium chloride and the ylide (triphenylphosphonio)cyanomethanide towards Group 11 metal complexes is described. Mononuclear neutral gold(I) and gold(III) complexes of the type [AuX{CH(CN)PPh3}] or [AuX3{CH(CN)PPh3}] and cationic derivatives such as [AuL{CH(CN)PPh3}]X have been ...
Alice Johnson, Isabel Marzo, M. Concepción Gimeno   +2 more
openaire   +3 more sources