| 1. |
- Zhou, Jin, et al.
(författare)
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The prognostic significance of peroxisome proliferator-activated receptor beta expression in the vascular endothelial cells of colorectal cancer
- 2014
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Ingår i: Journal of gastroenterology. - : Springer Verlag (Germany). - 0944-1174 .- 1435-5922. ; 49:3, s. 436-445
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Tidskriftsartikel (refereegranskat)abstract
- Currently, little is known regarding the role of peroxisome proliferator-activated receptor-beta (PPAR beta) in the vascular endothelial cells (VECs) of colorectal cancers (CRCs). The aim of this study was to investigate the relationship of PPAR beta expression in the VECs of CRCs in terms of the prognosis and clinicopathological features of CRC patients. The expression and localization of PPAR beta in the primary cancers and the matched normal mucosal samples of 141 Swedish CRC patients were analyzed in terms of its correlation with clinicopathological features and the expression of angiogenesis-related genes. This study also included 92 Chinese CRC patients. PPAR beta was predominantly localized in the cytoplasm and was significantly downregulated in the VECs of CRC compared to that of the normal mucosa. The low expression levels of PPAR beta in the VECs of CRC were statistically correlated with enhanced differentiation, early staging and favorable overall survival and were associated with the increased expression of VEGF and D2-40. The patients exhibiting elevated expression of PPAR beta in CRC cells but reduced expression in VECs exhibited more favorable survival compared with the other patients, whereas the patients with reduced expression of PPAR beta in CRC cells but increased expression in VECs exhibited less favorable prognosis. PPAR beta might play a tumor suppressor role in CRC cells in contrast to a tumor promoter role in the VECs of CRCs.
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| 2. |
- Tian, Fu-Yang, et al.
(författare)
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A novel potential : the interlayer potential for the fcc (111) plane family
- 2012
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Ingår i: Journal of Physics. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 24:4, s. 045001-
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Tidskriftsartikel (refereegranskat)abstract
- We propose a novel interlayer potential, which is different from usual interatomic potentials. The interlayer potential represents the interaction between atomic layers in a layered material. Based on the Chen-Mobius inversion method in combination with ab initio calculations, the interlayer interactions are obtained for the face centered cubic (fcc) (111) planes. In order to check the validity of our interlayer potential, we calculate the intrinsic stacking fault energy (gamma(sf)) and the surface energy (gamma(s)) of five metals: Al, Ni, Cu, Ag and Au. The predicted gamma(sf) and gamma(s) values are compared with the theoretical results obtained from direct calculations and also with the available experimental data. Using the interlayer potentials, we also investigate the phonon dispersion and phonon density of state in the fcc (111) plane family of the considered metals.
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| 3. |
- Tian, Fu-Yang, et al.
(författare)
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Interlayer potentials for fcc (111) planes of Pd-Ag random alloys
- 2012
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Ingår i: Computational materials science. - : Elsevier BV. - 0927-0256 .- 1879-0801. ; 63, s. 20-27
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Tidskriftsartikel (refereegranskat)abstract
- Using ab initio alloy theory in combination with the Chen-Mobius inversion method, we obtain the interaction potentials between layers of the face centered cubic (fcc) (111) plane family for elemental Pd and Ag metals and for Pd0.5Ag0.5 random alloy. Based on the interlayer potentials, we investigate properties related to the fcc (111) planes, such as the stacking fault energy, shear elastic constant, surface energy, surface relaxations, and phonon dispersion along the fcc [111] direction. The results agree well with those obtained by fully self-consistent ab initio calculations and also with the available experimental data, indicating that the properties related to the close-packed planes are well described by the interlayer potentials.
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| 4. |
- Tian, Shan Xi, et al.
(författare)
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Coherent interference in the resonant dissociative electron attachment to carbon monoxide
- 2013
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Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 88:1, s. 012708-
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Tidskriftsartikel (refereegranskat)abstract
- Dissociative electron attachment to carbon monoxide, e(-) + CO -> C + O-, at 9.5, 10.0, and 10.6 eV is investigated by using the anion velocity time-sliced map imaging technique. The completely backward scattering distributions of the fast O- fragment are observed at 10.0 and 10.6 eV. The single electron-molecule resonance model fails in interpretation to these unusual angular distributions, while a quantum interference model including two (at 10.0 eV) or three (at 10.6 eV) dissociative outgoing waves is consequently proposed and provides the satisfying results about the experimental data fittings. Moreover, coherent interference among the (2)Pi, (2)Delta, and (2)Phi resonant states of CO- at 10.6 eV could be further established, based on the fact that the sum of the phase-shift fitting values equals pi rad.
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