601 research outputs found
Diasporas and democratization in the post-communist world
No full textIf diaspora communities are socialized with democratic values in Western societies, they could be expected to be sympathetic to the democratization of their home countries. However, there is a high degree of variation in their behavior. Contrary to the predominant understanding in the literature that diasporas act in exclusively nationalist ways, this article argues that they do engage with the democratization of their home countries. Various challenges to the sovereignty of their homelands explain whether diasporas involve with procedural or liberal aspects of democratization. Drawing evidence from the activities of the Ukrainian, Serbian, Albanian and Armenian diasporas after the end of communism, I argue that unless diasporas are linked to home countries that enjoy both international legal and domestic sovereignty, they will involve only with procedural aspects of democratization. Diasporas filter international pressure to democratize post-communist societies by utilizing democratic procedures to advance unresolved nationalist goals
Absolute parameters of young stars: HX Velorum
No full textWe present combined photometric and spectroscopic analyses of the southern multiple star HX Vel. High-resolution spectra of this system were taken at the University of Canterbury Mt. John Observatory in the years 2009-2015. Absolute parameters for HX Vel tend to confirm its young and near-main-sequence nature. We specify the main adopted parameters of the (non-eclipsing) close binary as follows: M-1 = 8.5 +/- 1.7, M-2 = 5.4 +/- 1.2, R-1 = 5.0 +/- 0.3, R-2 = 3.1 +/- 0.2, (circle dot); T-1 25 000 +/- 1300, T-2 20 000 +/- 2500 (K); systemic M-V -4.2 +/- 0.2. These parameters are sensitive to the low inclination, where we find a small disparity between the photometrically optimal 28 +/- 2 degrees and an adopted value of 26 degrees that gives better consistency with main-sequence stellar modelling. The relationship of HX Vel to the galactic cluster IC 2395 and OB association Vela OB1C is also considered, in the context of photometric parallaxes found for HX Vel and other cluster members.School of Chemical and Physical Sciences of the Victoria University of Wellington; Royal Astronomical Society of New Zealand; Variable Stars South sectionGenerous allocations of time on the 1m McLennnan Telescope and HERCULES spectrograph at the University of Canterbury Mt John Observatory in support of the Southern Binaries Programme have been made available through its TAC and supported by its Director, Dr. K. Pollard and previous Director, Prof. J. B. Hearnshaw. Useful help at the telescope were provided by the UCMJOmanagement (N. Frost and previously A. Gilmore and P. Kilmartin). Considerable assistance with the use and development of the HRSP software (leading up to the latest version 5) was given by its author Dr. J. Skuljan. Encouragement and support for this programme have been shown by the the School of Chemical and Physical Sciences of the Victoria University of Wellington, as well as the Royal Astronomical Society of New Zealand and its Variable Stars South section (http://www.variablestarssouth.org)
Fe powder catalyzed highly efficient synthesis of alkenyl halides via direct coupling of alcohols and alkynes with aqueous HX as exogenous halide sources
No full textA simple and efficient catalytic method for the synthesis of alkenyl halides via direct coupling of alcohols and alkynes using aqueous HX (X=Cl, Br) as halide sources has been developed under mild conditions in the presence of Fe powder (1 mol %). In comparison with the high loading of FeX3 in previously reported protocols, the present approach provides a remarkable attractive methodology to a diverse range of alkenyl halides due to the advantages of simple operation and low-level metal contamination. (C) 2015 Elsevier Ltd. All rights reserved
fish and fishery products microbiology bacteria causing fish spoilage
No full textThis material describe bacteria which causing spoilage in fish and seafood products
ENTRANCE CHANNEL COMPLEXES X-HX (X=Cl and Br) IN SOLID PARAHYDROGEN
No full textAuthor Institution: Department of Chemistry, University of Wyoming, Laramie, WY 82071-3838We report high-resolution vibrational spectra of the entrance channel complexes X-HX (X=Cl and Br) isolated in solid parahydrogen. The related X-HF complexes have been successfully synthesized in liquid helium droplets and rotationally resolved spectra reported at an earlier meeting.} International Symposium on Molecular Spectroscopy, 18 June, 2003.} These free radical complexes are formed by co-depositing X_2_2^{35}^{37}$Cl present in natural abundance. These studies suggest that both conformers of the Br-HCl complex, HCl donor and HCl acceptor, have nearly equal populations within the parahydrogen matrix. These results are interesting since intermolecular potentials that include relativistic effects disagree on the relative stabilities of these two conformers. Present studies focus on forming the homodimers (Br-HBr and Cl-HCl) where H-atom tunneling may be observed spectroscopically. The latest results and analysis will be presented at the meeting
A COMPUTATIONAL INVESTIGATION OF c-CH...HX(X = F, Cl, Br) H-BONDED COMPLEXES
No full textAuthor Institution: Centre for Research in Molecular Modeling \& Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, CanadaCyclopropenylidene (c-CH) is of significant importance in interstellar chemistry and synthetic chemistry (e.g., transition metal and organic catalysis). Because of its peculiar structure, c-CH can act as a hydrogen-bond donor or acceptor. In order to gain insight into this feature, the ground-state potential energy surfaces of singlet c-CH complexed with hydrogen halides HX (X = F, Cl, Br) have been explored extensively by density-functional theory (B3LYP) and {\it{ab initio}} quantum chemistry (MP2) with a variety of basis sets, cc-pVxZ and aug-cc-pVxZ (x = D, T). The complexes characterized have the carbenic end of c-CH H-bonded to HX, with some proton transfer occurring, the extent of which follows the order HF < HCl < HBr. Accompanying the complex formation are the dipole moment enhancement, the charge transfer, red shifts of the HX vibrational stretching frequencies together with the significant enhancement of band intensity and concomitant HX bond elongation. The nature of H-bonding in these complexes has been explored, based on energy decomposition schemes and the Bader's quantum theory of atoms-in-molecules, with the conclusion that c-CH is a strong H-bond acceptor with respect to the hydrogen halides
Contesting antifascism: political knowledge creation and enlightenment at FC St. Pauli
No full textIn this work we explore boundary objects (BO) at the Hamburg-based football club FC St Pauli with both ‘home’ and ‘way’ fans. Utilizing Star and Griesemer’s (1989) broad categorizations of ‘material’ and ‘conceptual’ boundary objects as well as Carlile’s (2002) three tiers of boundary objects (syntactic, semantic, and pragmatic) we present identified boundary object’s that reflect fan understanding of FC St. Pauli as a bastion of anti-racist, anti-sexist, antisemitic and anti-homophobic political policy in sport
Magnetic structure and magnetization of z -axis helical Heisenberg antiferromagnets with XY anisotropy in high magnetic fields transverse to the helix axis at zero temperature
No full textA helix has a wave vector along the z axis with the magnetic moments ferromagnetically aligned within xy planes with a turn angle kd between the moments in adjacent planes in transverse field H=Hxˆi=0. The magnetic structure and x-axis average magnetization per spin of this system in a classical XY anisotropy field HA is studied versus kd, HA, and large Hx at zero temperature. For values of HA below a kd-dependent maximum value, the xy helix phase transitions with increasing Hx into a spin-flop (SF) phase where the ordered moments have x, y, and z components. The moments in the SF phase are taken to be distributed on either one or two xyz spherical ellipses. The minor axes of the ellipses are oriented along the z axis and the major axes along the y axis where the ellipses are flattened along the z axis due to the presence of the XY anisotropy. From energy minimization of the SF spherical ellipse parameters for given values of kd, HA, and Hx, four kd-dependent SF phases are found: either one or two xyz spherical ellipses and either one or two xy fans, in addition to the xy helix/fan phase and the paramagnetic (PM) phase with all moments aligned along H. The PM phase occurs via second-order transitions from the xy fan and SF phases with increasing Hx. Phase diagrams in the Hx−HA plane are constructed by energy minimization with respect to the SF phases, the xy helix/fan phase, and the xy SF fan phase for five kd values. One of these five phase diagrams is compared with the magnetic properties found experimentally for the model helical Heisenberg antiferromagnet EuCo2P2 and semiquantitative agreement is found.</p
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