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Showing 25 to 36 of 620 entries
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Structure of octreotide, a somatostatin analogue.

Acta crystallographica. Section D, Biological crystallography

Pohl E, Heine A, Sheldrick GM, Dauter Z, Wilson KS, Kallen J, Huber W, Pfäffli PJ.
PMID: 15299335
Acta Crystallogr D Biol Crystallogr. 1995 Jan 01;51:48-59. doi: 10.1107/S0907444994006104.

Octreotide, a synthetic somatostatin analogue, is an octapeptide with one disulfide bridge. Crystals of octreotide are orthorhombic, space group P2(1)2(1)2(1), a = 18.458 (5), b = 30.009 (7), c = 39.705 (27) A, with three molecules of octapeptide, one...

The magnetic shielding function of molecules and pi-electron delocalization.

Chemical reviews

Heine T, Corminboeuf C, Seifert G.
PMID: 16218570
Chem Rev. 2005 Oct;105(10):3889-910. doi: 10.1021/cr030082k.

No abstract available.

Car-Parrinello treatment for an approximate density-functional theory method.

The Journal of chemical physics

Rapacioli M, Barthel R, Heine T, Seifert G.
PMID: 17411104
J Chem Phys. 2007 Mar 28;126(12):124103. doi: 10.1063/1.2566510.

The authors formulate a Car-Parrinello treatment for the density-functional-based tight-binding method with and without self-consistent charge corrections. This method avoids the numerical solution of the secular equations, the principal drawback for large systems if the linear combination of atomic...

13C NMR pattern of Sc3N@C68. Structural assignment of the first fullerene with adjacent pentagons.

The journal of physical chemistry. A

Reveles JU, Heine T, Köster AM.
PMID: 16834069
J Phys Chem A. 2005 Aug 18;109(32):7068-72. doi: 10.1021/jp052062n.

Sc3N@C68 is assigned to isomer Sc3N@C68:6140 on the grounds of relative energies, geometrical data, and its 13C NMR pattern. Sc3N@C68:6140 is an endohedral fullerene where each Sc atom is coordinated to the center of an equatorial pentalene unit. Static...

Fourier transform infrared spectroscopic imaging of anisotropic poly(vinylidene fluoride) films with polarized radiation.

Applied spectroscopy

Vogel C, Wessel E, Siesler HW.
PMID: 18559145
Appl Spectrosc. 2008 Jun;62(6):599-603. doi: 10.1366/000370208784658039.

The technique of Fourier transform infrared (FT-IR) spectroscopic imaging with focal plane array detectors has proved to be a powerful technique for rapid chemical visualization of samples with a lateral resolution up to about 10 mum. However, the potential...

Passive Q Switching of a Diode-Pumped 946-nm Nd:YAG Laser with 1.6-W Average Output Power.

Applied optics

Kellner T, Heine F, Huber G, Kück S.
PMID: 18301527
Appl Opt. 1998 Oct 20;37(30):7076-9. doi: 10.1364/ao.37.007076.

As much as 1.6-W average output power was emitted in a simple setup from a diffusion-bonded Nd:YAG rod with 70-100-ns Q-switched pulses at 946 nm and repetition frequencies between 15 and 45 kHz at 22-W incident diode-pump power. A...

Quantized liquid density-functional theory for hydrogen adsorption in nanoporous materials.

Physical review. E, Statistical, nonlinear, and soft matter physics

Patchkovskii S, Heine T.
PMID: 19905119
Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Sep;80(3):031603. doi: 10.1103/PhysRevE.80.031603. Epub 2009 Sep 16.

We develop a finite-temperature quantized version of density-functional theory of atomic and molecular liquids (QLDFT). Following the Kohn-Sham partitioning of the free energy, we introduce a noninteracting reference fluid of particles obeying the Maxwell-Boltzmann statistics. The kinetic and potential...

Solvent interactions in methanol/N, N-dimethylamide binary systems studied by Fourier transform infrared-attenuated total reflection (FT-IR/ATR) and two-dimensional correlation spectroscopy (2D-COS).

Applied spectroscopy

Unger M, Harnacke B, Noda I, Siesler HW.
PMID: 21819779
Appl Spectrosc. 2011 Aug;65(8):892-900. doi: 10.1366/10-06141.

The interaction of N,N-dimethyl formamide (DMF) and N,N-dimethyl acetamide (DMA) with methanol in solution mixtures was studied using Fourier transform infrared-attenuated total reflection (FT-IR/ATR) spectroscopy. The concentration-dependent FT-IR/ATR spectra of DMF/methanol and DMA/methanol mixtures were recorded in the wavenumber...

Comparison of different X-ray data-collection systems using the crystal structure of octreotide.

Acta crystallographica. Section D, Biological crystallography

Pohl E, Heine A, Sheldrick GM, Dauter Z, Schneider TR, Wilson KS, Kallen J.
PMID: 15299336
Acta Crystallogr D Biol Crystallogr. 1995 Jan 01;51:60-8. doi: 10.1107/S0907444994006116.

The octapeptide octreotide crystallizes with three peptide molecules and about 20% water in the asymmetric unit, and in many ways possesses diffraction properties similar to those of a 'mini-protein' consisting of 24 amino-acid residues. It diffracts to about 1.0...

Unravelling phenomenon of internal rotation in B13+ through chemical bonding analysis.

Chemical communications (Cambridge, England)

Martínez-Guajardo G, Sergeeva AP, Boldyrev AI, Heine T, Ugalde JM, Merino G.
PMID: 21461423
Chem Commun (Camb). 2011 Jun 14;47(22):6242-4. doi: 10.1039/c1cc10821b. Epub 2011 Apr 01.

We describe and explain the fluxionality of B(13)(+). The chemical bonding analysis shows that the inner triangle of B(13)(+) is bound to the peripheral ring by delocalized bonds only, allowing a quasi-free rotation of the inner ring.

Stacking in bulk and bilayer hexagonal boron nitride.

Physical review letters

Constantinescu G, Kuc A, Heine T.
PMID: 23909342
Phys Rev Lett. 2013 Jul 19;111(3):036104. doi: 10.1103/PhysRevLett.111.036104. Epub 2013 Jul 17.

The stacking orders in layered hexagonal boron nitride bulk and bilayers are studied using high-level ab initio theory [local second-order Møller-Plesset perturbation theory (LMP2)]. Our results show that both electrostatic and London dispersion interactions are responsible for interlayer distance...

Two dimensional materials beyond MoS2: noble-transition-metal dichalcogenides.

Angewandte Chemie (International ed. in English)

Miró P, Ghorbani-Asl M, Heine T.
PMID: 24554594
Angew Chem Int Ed Engl. 2014 Mar 10;53(11):3015-8. doi: 10.1002/anie.201309280. Epub 2014 Feb 19.

The structure and electronic structure of layered noble-transition-metal dichalcogenides MX2 (M=Pt and Pd, and chalcogenides X=S, Se, and Te) have been investigated by periodic density functional theory (DFT) calculations. The MS2 monolayers are indirect band-gap semiconductors whereas the MSe2...

Showing 25 to 36 of 620 entries