83,253 research outputs found
Synthesis and Characterization of platinum – selenium Derivatives: X-ray Structure of \u3cem\u3etrans\u3c/em\u3e-Pt(Pet\u3csub\u3e3\u3c/sub\u3e)\u3csub\u3e2\u3c/sub\u3e(SePh)\u3csub\u3e2\u3c/sub\u3e
The crystal structure of trans-[((bis)triethylphosphine)(bis(phenylselenato))platinum (II)] has been determined by single crystal X-ray diffraction. Crystallization occurs in the triclinic space group P-1 (No. 2) with a = 8.9964(2) Å, b = 11.5103(2) Å, c = 14.9335(3) Å; α = 85.8750(10)°, β = 72.5350(10)°, γ = 68.4450(10)°. Details of the structure and spectroscopic results are presented and discussed and comparisons are made with related square planar platinum (II) structures
\u3cem\u3eN\u3c/em\u3e-Methylbenzothiazole-2(3\u3cem\u3eH\u3c/em\u3e)-selone, C\u3csub\u3e8\u3c/sub\u3eH\u3csub\u3e7\u3c/sub\u3eNSSe
The crystal structure of N-methyl1,3-benzothiazole-2(3H)-selone, (mbts) has been studied to estimate the changes in the molecular geometry of the mbts ligand upon coordination. Hypervalent complexes of mbts with TeII and II have been studied by us previously. A significant elongation of the Se=C bond [from 1.817 (7) in mbts to 1.85-1.88 Ã… in the complexes] was found, but there were no significant changes in the other geometric parameters of the ligand. The only other bond-length decrease of note was for SeC-NMe [from 1.35 (1) in mbts to 1.32-1.34 Ã… in the complexes]. Thus, only the amino group takes part in electron redistribution upon coordination
Structural ambiguity of the Chinese version of the hospital anxiety and depression scale in patients with coronary heart disease
Background
The Hospital Anxiety and Depression Scale (HADS) is a widely used screening tool designed as a case detector for clinically relevant anxiety and depression. Recent studies of the HADS in coronary heart disease (CHD) patients in European countries suggest it comprises three, rather than two, underlying sub-scale dimensions. The factor structure of the Chinese version of the HADS was evaluated in patients with CHD in mainland China.
Methods
Confirmatory factor analysis (CFA) was conducted on self-report HADS forms from 154 Chinese CHD patients.
Results
Little difference was observed in model fit between best performing three-factor and two-factor models.
Conclusion
The current observations are inconsistent with recent studies highlighting a dominant underlying tri-dimensional structure to the HADS in CHD patients. The Chinese version of the HADS may perform differently to European language versions of the instrument in patients with CHD
Bis[(dimethyl-λ\u3csup\u3e4\u3c/sup\u3e-sulfanylidene)oxonium] hexabromidotellurate(IV) dimethyl sulfoxide disolvate
Modeling missing transverse energy in V+jets at CERN LHC
I discuss a method to model the instrumental response of the CMS and ATLAS
detectors at high transverse missing energies to dominant standard model V+jets
backgrounds, where V is a Z, gamma or W, using multi-jet QCD events. The method
is developed for new physics searches in early data at the Large Hadron
Collider (LHC) with minimal recourse to simulation.Comment: Replaced with the published versio
Information from leading neutrons at HERA
In principle, leading neutrons produced in photoproduction and deep-inelastic
scattering at HERA have the potential to determine the pion structure function,
the neutron absorptive cross section and the form of the pion flux. To explore
this potential we compare theoretical predictions for the x_L and p_t spectra
of leading neutrons, and the Q^2 dependence of the cross section, with the
existing ZEUS data.Comment: 17 pages, 8 figure
Checking formalism for central exclusive production in the first LHC runs
We discuss how the early LHC data runs can provide crucial tests of the
formalism used to predict the cross sections of central exclusive production.Comment: 7 pages, 6 figures; Based on a talk by A.D. Martin at the CERN - DESY
Workshop "HERA and the LHC", 26 - 30 May 2008, CER
Lessons from LHC elastic and diffractive data
In the light of LHC data, we discuss the global description of all high
energy elastic and diffractive data, using a one-pomeron model, but including
multi-pomeron interactions. The LHC data indicate the need of a
behaviour, where is the gluon transverse momentum along the partonic
ladder structure which describes the pomeron. We also discuss tensions in the
data, as well as the dependence of the slope of in the
small domain.Comment: 5 pages, 3 figures, Proceedings of Diffraction 2014, Primosten,
Croatia, Sept. 10-1
Diffraction at the LHC
We show that the diffractive pp (and p\bar{p}) data (on \sigma_tot,
d\sigma_el/dt, proton dissociation into low-mass systems, \sigma^D(low M), and
high-mass dissociation, d\sigma/d(\Delta\eta)) in a wide energy range from
CERN-ISR to LHC energies, may be described in a two-channel eikonal model with
only one `effective' pomeron. By allowing the pomeron coupling to the
diffractive eigenstates to depend on the collider energy (as is expected
theoretically) we are able to explain the low value of \sigma^D(low M) measured
at the LHC. We calculate the survival probability, S^2, of a rapidity gap to
survive `soft rescattering'. We emphasize that the values found for S^2 are
particularly sensitive to the detailed structure of the diffractive
eigenstates.Comment: 20 pages, 6 figures. Version to be published in EPJC. Typos corrected
in eqs.(4) and (11
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