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| 1 | Screw dislocation structure and mobility in body centered cubic Fe predicted by a Gaussian Approximation Potential显示文摘The plastic flow behavior of bcc transition metals up to moderate temperatures is dominated by the thermally activated glide of screw dislocations,which in turn is determined by the atomic-scale screw dislocation core structure and the associated kink-pair nucleation mechanism for glide.Modeling complex plasticity phenomena requires the simulation of many atoms and interacting dislocations and defects.These sizes are beyond the scope of first-principles methods and thus require empirical interatomic potentials.Especially for the technological important case of bcc Fe,existing empirical interatomic potentials yield spurious behavior.Here,the structure and motion of the screw dislocations in Fe are studied using a new Gaussian Approximation Potential(GAP)for bcc Fe,which has been shown to reproduce the potential energy surface predicted by density-functional theory(DFT)and many associated properties.The Fe GAP predicts a compact,non-degenerate core structure,a single-hump Peierls potential,and glide on{110},consistent with DFT results.The thermally activated motion at finite temperatures occurs by the expected kink-pair nucleation and propagation mechanism.The stress-dependent enthalpy barrier for screw motion,computed using the nudgedelastic-band method,follows closely a form predicted by standard theories with a zero-stress barrier of~1 eV,close to the experimental value of 0.84 eV,and a Peierls stress of~2 GPa consistent with DFT predictions of the Peierls potential. | Francesco Maresca Daniele Dragoni Gábor Csányi Nicola Marzari William A.Curtin | 2018 | npj Computational Materials2018，，1： | 5 |
| 2 | Differential gene expression between squamous cell carcinoma of esophageus and its normal epithelium; altered pattern of mal,akrlc2, and rablla expression显示文摘AIM: To identify the altered gene expression patterns in squamous cell carcinoma of esophagus (ESCC) in relation to adjacent normal esophageal epithelium. METHODS: Total RNA was extracted using SV total RNA isolation kit from snap frozen tissues of ESCC samples and normal esophageal epithelium far from the tumor. Radio-labeled cDNA were synthesized from equal quantities of total RNAs of tumor and normal tissues using combinations of 24 arbitrary 13-mer primers and three different anchoring oligo-dT primers and separated on sequencing gels. cDNA with considerable different amounts of signals in tumor and normal tissue were reamplified and cloned. Using southern blot, the clones of each band were controlled for false positive results caused by probable heterogeneity of cDNA population with the same size. Clones that confirmed differential expression by slot blot selected for sequencing and northern analysis. Corresponding full-length gene sequences was predicted using human genome project data, related transcripts were translated and used for various protein/motif searches to speculate their probable functions. RESULTS: The 97 genes showed different levels of cDNA in tumor and normal tissues of esophagus. The expression of mal gene was remarkably down. regulated in all 10 surveyed tumor tissues. Akrlc2, a member of the aldoketo reductase 1C family, which is involved in metabolism of sex hormones and xenobiotics, was up-regulated in 8 out of 10 inspected ESCC samples. Rablla, RPL7, and RPL28 showed moderate levels of differential expression. Many other cDNAs remained to further studies. CONCLUSION: The mal gene which is switched-off in all ESCC samples can be considered as a tumor suppressor gene that more studies in its regulation may lead to valuable explanations in ESCC development. Akrlc2 which is upregulated in ESCC probably plays an important role in tumor development of esophagus and may be proposed as a potential molecular target in ESCC treatments. Differential display technique in spite of many disadvantages is still a valuable technique in gene function exploration studies to find new candidates for improved ones like gene chips. | Sakineh Kazemi-Noureini Sergio Colonna-Romano Abed-Ali Ziaee Mohammad-Ali Malboobi Mansour Yazdanbod Parviz Setayeshgar Bruno Maresca | 2004 | World Journal of Gastroenterology2004，10，12： | 4 |
| 3 | 99mTc-Labeled Small-Molecule Inhibitors of Prostate-Specific Membrane Antigen for Molecular Imaging of Prostate Cancer显示文摘 | Shawn M. Hillier Kevin P. Maresca Genliang Lu Ross D. Merkin John C. Marquis Craig N. Zimmerman William C. Eckelman John L. Joyal John W. Babich | 2013 | Journal of Nuclear Medicine2013，，8： | 2 |
| 4 | MR imaging and MRCP of hilar cholangiocarcinoma显示文摘 | R. Manfredi G. Masselli G. Maresca M. G. Brizi A. Vecchioli P. Marano | 2003 | Abdominal Imaging2003，，3： | 1 |
| 5 | Local-regional staging of endometrial carcinoma:role of MR imaging in surgical planning显示文摘 | Manfredi R Mirk P Maresca G | | 0，，02： | 1 |
| 6 | Color Doppler sonography in the diagnosis and monitoring of arterial complications after liver transplantation显示文摘 | De Gaetano AM Cotroneo AR Maresca G | 2000 | J Clin Ultrasound2000，28，8： | 1 |
| 7 | Polypharmacolog3' of sulfonamides: pazopanib, a multitargeted receptor tyrosine kinase inhibitor in clinical use, potently inhibits several mammalian carbonic anhydrases 显示文摘 | WINUM JY MARESCA A CARTA F | 2012 | Chem Commun ( Camb )2012，48，66： | 1 |
| 8 | Local- Regional Staging ot' Endometrial Carcinomal Role of MR Imaging in Surgical Planning显示文摘 | Manfredi R Mirk P Maresca G | 2004 | Radiology2004，231，2： | 1 |
| 9 | Local regional staging of endometrial carcinoma: role of MR imaging in surgical planing显示文摘 | Manfrendi R Mirk P Maresca G | 2004 | Radiology2004，231，2： | 1 |
| 10 | 查看详情显示文摘 | Mahfoud R Maresca M Garmy N | | 0，，： | 1 |
| 11 | The mycotoxin patulin alters the barrier function of the intestinal epithelium:mechanism of action of the toxin and protective effects of glutathione显示文摘 | Mahfoud R Maresca M Garmy N Fantini J | 2002 | Toxicol Appl Pharmacol2002，181，3： | 1 |
| 12 | New prospects for ultrasound contrast agents显示文摘 | Maresca G Summaria V Colagrande C | 1998 | Eur J Radiol1998，272，： | 1 |
| 13 | Intra-articular fragments in acetabular fracture-dislocation显示文摘 | Pascarella R Maresca A Reggiani L M | 2009 | Orthopeadics2009，32，6： | 1 |
| 14 | Application of a multi-pass high-pressure homogenization treatment for the pasteurization of fruit juices显示文摘 | Maresca P Dons1 F Ferrari G | 2011 | Journal of Food Engineering2011，104，： | 1 |
| 15 | Estimating Wind Speed from HF Skywave Radar Sea Backscatter显示文摘 | Maresca J W Barnum J R | 1982 | IEEE Trans Antennas Propagation1982，30，5： | 1 |
| 16 | The integrated diagno- sis of hepatic focal nodular hyperplasia:eehography, color Doppler, computed tomography and magnetic resonanee compared 显示文摘 | De Gaetano A De France A Maresca G et d | 1996 | Radiol Med1996，91，3： | 1 |
| 17 | Measuring plasma fibrinogen to predict stroke and myocardial infarction an update 显示文摘 | Blasio AD Marchioli R | 1999 | Arterioscler Thromb Vasc Biol1999，19，： | 1 |
| 18 | Inorganic byproducts in waters disinfected with chlorine dioxide 显示文摘 | Veschetti E Cittadini B Maresca D | 2005 | Microchem J2005，79，12： | 1 |
| 19 | 显示文摘 | Dimitriadis E K Horkay F Maresca J | 2002 | Biophys J2002，72，82： | 1 |
| 20 | Single-stranded heteroduplex intermediates in lambda Red homologous recombination显示文摘 | Maresca M Erler E F U J | 2010 | BMC Mol Biol2010，11，： | 1 |
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