| 1. |
- Xiong, Wei, et al.
(författare)
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Thermodynamic reassessment of the Cu-Mg-Ni system with brief comments on the thermodynamic modeling of the sub-systems
- 2008
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Ingår i: Calphad. - : Elsevier BV. - 0364-5916 .- 1873-2984. ; 32:4, s. 675-685
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Tidskriftsartikel (refereegranskat)abstract
- The Cu-Mg-Ni system was reassessed using the CALPHAD (CALculation of PHAse Diagram) approach, in order to provide a reliable thermodynamic description. A set of self-consistent thermodynamic parameters for the Cu-Mg-Ni system was obtained. The liquidus projection and the reaction scheme were generated by using the present thermodynamic parameters. Significant improvements have been made, compared with the previous assessments. Thermodynamic modeling for the three sub-systems was briefly reviewed. Further work is of interest to refine the thermodynamic description of the binary systems, in order to avoid the appearance of the artificial phase equilibria in liquid above 2500 degrees C.
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| 2. |
- Zhang, Wei-Wei, et al.
(författare)
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Phase equilibria of the Fe-Ni-Si system at 850 degrees C
- 2009
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Ingår i: Journal of Alloys and Compounds. - : Elsevier BV. - 0925-8388 .- 1873-4669. ; 481:1-2, s. 509-514
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Tidskriftsartikel (refereegranskat)abstract
- By means of X-ray diffraction, metallography, scanning electron microscopy with energy dispersive Xray analysis, and electron probe microanalysis, the constitution of the ternary Fe-Ni-Si system at 850 degrees C over the entire composition range was established with 24 alloys. Ten of the three-phase equilibria were well determined at 850 degrees C. The existence of the ternary compound Fe5Ni3Si2 (tau(1)) with a cubic crystal structure at 850 degrees C is confirmed. The homogeneity ranges were measured and the lattice parameters were determined for most observed phases.
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| 3. |
- Zhang, Wei-Wei, et al.
(författare)
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Thermodynamic Assessment of the Cu-B System Supported by Key Experiment and First-Principles Calculations
- 2009
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Ingår i: Journal of Phase Equilibria and Diffusion. - : Springer Science and Business Media LLC. - 1547-7037 .- 1863-7345. ; 30:5, s. 480-486
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Tidskriftsartikel (refereegranskat)abstract
- The Cu-B system was investigated via a hybrid approach of key experiment and thermodynamic modeling. Based on the critically assessed Cu-B phase diagram, seven crucial alloys were selected and prepared by arc melting the pure elements. An inductively coupled plasma-atomic emission spectrometric analysis was conducted to determine the compositions of the prepared alloys. The phase equilibria were determined by using x-ray diffraction, electron probe microanalysis, and differential thermal analysis. The temperature associated with the eutectic reaction, L double left right arrow (B) + (Cu); was measured to be 1028 +/- 2 degrees C. First-principles calculations indicate that the energy of inserting a B atom into the interstitial vacancy (Va) site of the lattice for Cu atoms is marginally lower than that of substituting for a Cu atom with a B atom. Consequently, the sublattice model (Cu)(B, Va) in which B atoms occupy the interstitial sites was employed for the fcc (Cu) phase rather than the model (Cu, B)(Va) in which B atoms substitute for Cu atoms. A thermodynamic modeling of the Cu-B system was then performed by considering the reliable literature data and the present experimental results. A good agreement between modeling and experiment was obtained.
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| 4. |
- Ablikim, M., et al.
(författare)
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Measurements of (XcJ)-> K+K-K+K- decays
- 2006
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Ingår i: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 642:3, s. 197-202
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Tidskriftsartikel (refereegranskat)abstract
- Using 14M psi(2S) events taken with the BESII detector, chi(cJ) -> 2(K+K-) decays are studied. For the four-kaon final state, the branching fractions are B(chi(c0,1,2) ->.2(K+K-)) = (3.48 +/- 0.23 +/- 0.47) x 10(-3), (0.70 +/- 0.13 +/- 0.10) x 10(-3), and (2.17 +/- 0.20 +/- 0.31) x 10(-3). For the phi K+K- final state, the branching fractions, which are measured for the first time, are B(chi(c0,1,2) -> phi K+K-) = (1.03 +/- 0.22 +/- 0.15) x 10(-3), (0.46 +/- 0.16 +/- 0.06) x 10(-3), and (1.67 +/- 0.26 +/- 0.24) x 10(-4). For the phi phi final state, B(chi(c0,2) -> phi phi) = (0.94 +/- 0.21 +/- 0.13) x 10(-3) and (1.70 +/- 0.30 +/- 0.25) x 10(-3).
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| 5. |
- Chien, Ming-Hsien, et al.
(författare)
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Vascular endothelial growth factor-C (VEGF-C) promotes angiogenesis by induction of COX-2 in leukemic cells via the VEGF-R3/JNK/AP-1 pathway.
- 2009
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Ingår i: Carcinogenesis. - : Oxford University Press (OUP). - 0143-3334 .- 1460-2180. ; 30:12, s. 2005-13
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Tidskriftsartikel (refereegranskat)abstract
- Vascular endothelial growth factor (VEGF)-C is recognized as a tumor lymphangiogenic factor based on the effects of activated VEGF-R3 on lymphatic endothelial cells. Many tumor cells express VEGF-R3 but the function of this receptor in tumor cells is largely unknown. It has been reported that the VEGF-C/VEGF-R3 axis is activated in subsets of leukemia patients. Herein, we have shown that VEGF-C induces angiogenic activity in the tube formation assay invitro and Matrigel plug assay in vivo by upregulating an angiogenic factor, cyclooxygenase-2 (COX-2), through VEGF-R3 in the human acute myeloid leukemia (AML) cell line, THP-1. COX-2 induction by VEGF-C was also observed in other VEGF-R3(+) human AML cell lines (U937 and HL60). Moreover, immunohistochemical analysis of bone marrow specimens of 37 patients diagnosed with AML revealed that VEGF-C expression in specimens was associated with the expression of COX-2 (P < 0.001). The manner by which signaling pathways transduced by VEGF-C is responsible for COX-2 upregulation was further investigated. Blocking the p42/44 mitogen-activated protein kinase (MAPK) pathway with the MAPK kinase inhibitor, PD 98059, failed to inhibit VEGF-C-mediated COX-2 expression. However, VEGF-C-induced COX-2 upregulation was effectively abolished by overexpression of dominant-negative c-Jun N-terminal kinase (JNK) or treatment with the JNK inhibitor, SP 600125. VEGF-C induced JNK-dependent nuclear translocation of c-Jun. Furthermore, chromatin immunoprecipitation and reporter assays revealed that VEGF-C enhanced c-Jun binding to the cyclic adenosine 3',5'-monophosphate-response element of the COX-2 promoter and induced COX-2 expression. In sum, the data herein highlight the pathogenic role of VEGF-C in leukemia via regulation of angiogenesis through upregulation of COX-2.
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| 6. |
- Liao, Zhong-Wei, et al.
(författare)
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Robust Low Voltage Program-Erasable Cobalt-Nanocrystal Memory Capacitors with Multistacked Al2O3/HfO2/Al2O3 Tunnel Barrier
- 2009
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Ingår i: Chinese Physics Letters. - 0256-307X .- 1741-3540. ; 26:8, s. 087303-
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Tidskriftsartikel (refereegranskat)abstract
- An atomic-layer-deposited Al2O3/HfO2/Al2O3 (A/H/A) tunnel barrier is investigated for Co nanocrystal memory capacitors. Compared to a single Al2O3 tunnel barrier, the A/H/A barrier can significantly increase the hysteresis window, i. e., an increase by 9V for +/- 12V sweep range. This is attributed to a marked decrease in the energy barriers of charge injections for the A/H/A tunnel barrier. Further, the Co-nanocrystal memory capacitor with the A/H/A tunnel barrier exhibits a memory window as large as 4.1V for 100 mu s program/erase at a low voltage of +/- 7V, which is due to fast charge injection rates, i. e., about 2.4 x 10(16) cm(-2) s(-1) for electrons and 1.9 x 10(16) cm(-2) s(-1) for holes.
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| 7. |
- Segerstedt, Anders, et al.
(författare)
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Analysis of ICT use in the Barents region : research findings from logistics service providers and forest industry
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Efficient logistics is a major aspect in the competitiveness of the companies in the Barents Region because their customers are typically located far away from the region. This study focuses on the Logistics Service Provider (LSP) and the forest industries in the Barents region. The LSPs are important facilitators of trade whose role has increased with the prevailing outsourcing trends of the industries. The appropriate use of Information and Communication Technologies (ICT) provides one means to support the competitive strategies of the LSPs in the Barents region, where the sector is typically composed of small and medium-sized LSPs. To date, the role and competitive developing processes of small and medium-sized LSPs have not been extensively studied and there is very little information on the ICT capabilities and practices in the sector. The research provides general information on the types of LSPs that are found in the Barents region (number of companies, industry trends, company cooperation practices etc.) and studies the current status of ICT implementation in the industry. In particular, the perceived motivators and barriers for ICT implementation are of interest. A survey is conducted in Barents area Finland, Norway, and Sweden, resulting in a total of 168 responses. The results indicate that majority of the LSPs are familiar with computer technology and have some ICT tools available. The surveyed Norwegian LSPs are most “technology-oriented” overall, but the conclusion does not hold for all technology tools. In order to better understand the ICT implementation from the supply chain management perspective, the Russian forest sector is studied in more detail. A total of 9 qualitative interviews are conducted with companies in or related to the Russian forest industry. Overall, the ICT implementation is in a very incipience stage in forestry in Russia. Nonunderstanding of benefits that could be obtained using ICT was mentioned as the main barrier for development of ICT competence. The lack of IT-skilled specialists in Kostomuksha, where majority of the interviews took place, was mentioned as one of the obstacles for a more wide-spread use of ICT in forestry.
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| 8. |
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| 9. |
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| 10. |
- Wang, Wei-Zhou, et al.
(författare)
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Comparative analysis of gene expression profiles between the normal human cartilage and the one with endemic osteoarthritis.
- 2009
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Ingår i: Osteoarthritis and Cartilage. - : Saunders Elsevier. - 1063-4584 .- 1522-9653. ; 17:1, s. 83-90
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To investigate the differences in gene expression profiles of adult articular cartilage with endemic osteoarthritis (OA), Kashin-Beck disease (KBD), and the same regions in the normal joint.METHODS: The messenger RNA expression profiles of articular cartilage with KBD diagnosed according to "Diagnosing Criteria of Kashin-Beck Disease in China" were compared with the normal cartilage. Total RNA isolated separately from four pairs of the KBD and normal cartilage samples were evaluated by oligonucleotide microarray analysis. The microarray data were confirmed by quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) amplification and were compared with previously published experiments.RESULTS: About 4100 transcripts, which corresponded to 35% of the expressed transcripts, showed >or=twofold differences in expression between the cartilage tissues in pairs. Approximately 2% of the expressed genes (79, 55 genes expressed in KBD>normal; 24 genes expressed in KBDCONCLUSION: Differences between KBD cartilage and the normal exhibited a similar pattern among the four pairs examined, indicating the presence of common mechanisms mainly including chondrocyte metabolism and apoptosis that contribute to cartilage destruction in KBD.
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