نتایج جستجو برای: weak molecular complexes

تعداد نتایج: 882224  

2003
F. P. Israel L. E. B. Johansson M. Rubio G. Garay Th. de Graauw R. S. Booth F. Boulanger M. L. Kutner J. Lequeux L. - A. Nyman

We present J=1–0 and J=2–1 12 CO maps of several star-forming regions in both the Large and the Small Magellanic Cloud, and briefly discuss their structure. Many of the detected molecular clouds are relatively isolated and quite small with dimensions of typically 20 pc. Some larger complexes have been detected, but in all cases the extent of the molecular clouds sampled by CO emission is signif...

Journal: :Journal of the American Chemical Society 2007
Junrong Zheng Michael D Fayer

Weak pi hydrogen-bonded solute/solvent complexes are studied with ultrafast two-dimensional infrared (2D-IR) vibrational echo chemical exchange spectroscopy, temperature-dependent IR absorption spectroscopy, and density functional theory calculations. Eight solute/solvent complexes composed of a number of phenol derivatives and various benzene derivatives are investigated. The complexes are for...

Journal: :Random Structures and Algorithms 2021

The Linial–Meshulam complex model is a natural higher dimensional analog of the Erdős–Rényi graph model. In recent years, Linial and Peled established limit theorem for Betti numbers complexes with an appropriate scaling underlying parameter. present article aims to extend that result more general random simplicial models. We introduce class homogeneous spatially independent complexes, includin...

Journal: :Inorganic Chemistry 2021

Magnetic anisotropy, in the absence of an external magnetic field, relates to degeneracy lift energy levels. In standard case transition metal complexes, this property is usually modeled by anisotropic spin Hamiltonian and one speaks “zero-field splitting” (ZFS) states. While mononuclear complexes has been extensively described means ab initio quantum mechanical calculations, literature on poly...

1999
J. Arnhold P. Grassberger K. Lehnertz C. E. Elger

We present a measure for characterizing statistical relationships between two time sequences. In contrast to commonly used measures like cross-correlations, coherence and mutual information, the proposed measure is non-symmetric and provides information about the direction of interdependence. It is closely related to recent attempts to detect generalized synchronization. However, we do not assu...

Journal: :Nucleic acids research 1978
F Arena G Ciliberto S Ciampi R Cortese

Pseudouridylate synthetase from Salmonella typhimurium has been purified 1,000 fold and is about 90% pure. The enzyme has a molecular weight of 50,000 daltons. In the presence of tRNA there is a change in molecular weight from 50.000 to 100.000. This change does not seem to be due to the formation of a tRNA-enzyme complex but rather to a tRNA induced dimerization. Other properties of the enzyme...

Journal: :Crystals 2022

The synthesis and crystal structures of three heteroleptic complexes Zn(II) Cd(II) with pyridine ligands (ethyl nicotinate (EtNic), N,N-diethylnicotinamide (DiEtNA), 2-amino-5-picoline (2Ampic) are presented. complex [Zn(EtNic)2Cl2] (1) showed a distorted tetrahedral coordination geometry two EtNic ligand units chloride ions as monodentate ligands. Complexes [Zn(DiEtNA)(H2O)4(SO4)]·H2O (2) [Cd(...

Journal: :Accounts of chemical research 2007
Rory Waterman Paul G Hayes T Don Tilley

A variety of transition-metal complexes with terminal silylene ligands have become available in recent years, because of the discovery of several preparative methods. In particular, three general synthetic routes to these complexes have emerged, on the basis of anionic group abstraction, coordination of a free silylene, and alpha-hydrogen migration. The direct transformation of organosilanes to...

Journal: :ACS nano 2011
Jyotsnendu Giri Mamadou S Diallo André J Simpson Yi Liu William A Goddard Rajeev Kumar Gwen C Woods

The interactions of nanomaterials with plasma proteins have a significant impact on their in vivo transport and fate in biological fluids. This article discusses the binding of human serum albumin (HSA) to poly(amidoamine) [PAMAM] dendrimers. We use protein-coated silica particles to measure the HSA binding constants (K(b)) of a homologous series of 19 PAMAM dendrimers in aqueous solutions at p...

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