2926
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Zaman MS, Chen Y, Deng G, Shahryari V, Suh SO, Saini S, Majid S, Liu J, Khatri G, Tanaka Y, Dahiya R. The functional significance of microRNA-145 in prostate cancer. Br J Cancer 2010; 103:256-64. [PMID: 20588276 PMCID: PMC2906737 DOI: 10.1038/sj.bjc.6605742] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background: MicroRNAs (miRNAs) are small noncoding RNAs that have important roles in numerous cellular processes. Recent studies have shown aberrant expression of miRNAs in prostate cancer tissues and cell lines. On the basis of miRNA microarray data, we found that miR-145 is significantly downregulated in prostate cancer. Methods and results: We investigated the expression and functional significance of miR-145 in prostate cancer. The expression of miR-145 was low in all the prostate cell lines tested (PC3, LNCaP and DU145) compared with the normal cell line, PWR-1E, and in cancerous regions of human prostate tissue when compared with the matched adjacent normal. Overexpression of miR-145 in PC3-transfected cells resulted in increased apoptosis and an increase in cells in the G2/M phase, as detected by flow cytometry. Investigation of the mechanisms of inactivation of miR-145 through epigenetic pathways revealed significant DNA methylation of the miR-145 promoter region in prostate cancer cell lines. Microarray analyses of miR-145-overexpressing PC3 cells showed upregulation of the pro-apoptotic gene TNFSF10, which was confirmed by real-time PCR and western analysis. Conclusion: One of the genes significantly upregulated by miR-145 overexpression is the proapoptotic gene TNFSF10. Therefore, modulation of miR-145 may be an important therapeutic approach for the management of prostate cancer.
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2927
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Liu C, Liu J, Li H, Zhang Z, Han Y, Huang S, Jin W. Karyotyping in melon (Cucumis melo L.) by cross-species fosmid fluorescence in situ hybridization. Cytogenet Genome Res 2010; 129:241-9. [PMID: 20551614 DOI: 10.1159/000314343] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Chromosome identification is critical for cytogenetic research and will accelerate studies on genetic variation and breeding, especially for those species with relatively little sequence information. So far, no reliable cytological landmarks have been developed to distinguish individual chromosomes in melon. In this study, using FISH (fluorescence in situ hybridization) combined with comparative genome information, we selected 21 cucumber fosmids anchored by SSR markers as chromosome-specific cytological markers for melon chromosomes. Moreover, with the help of melon centromeric satellite DNA repeats CentM, 45S rDNA and 5S rDNA, sequential FISH with 3 sets of multi-fosmid cocktails were conducted on the same metaphase cell, which allowed us to simultaneously identify each of the 12 metaphase chromosomes of melon and a standardized melon karyotype of somatic metaphase chromosomes was constructed. Finally, we compared the distribution of 21 FISH-mapped fosmids between melon and cucumber chromosomes, which allows a better understanding of the evolutionary process shaping these 2 species. Our study provides a basis for cytological characterization of the melon genome and comparative genomics of Cucurbitaceae.
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2928
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Liu J, Falcoz Q, Gauthier D, Flamant G, Zheng CZ. Volatilization behavior of Cd and Zn based on continuous emission measurement of flue gas from laboratory-scale coal combustion. CHEMOSPHERE 2010; 80:241-247. [PMID: 20457467 DOI: 10.1016/j.chemosphere.2010.04.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 04/12/2010] [Accepted: 04/12/2010] [Indexed: 05/29/2023]
Abstract
The accumulation of toxic metals generated by coal-fired power stations presents a serious threat to the environment. The volatilization behavior of two representative metals (Cd and Zn), and the influence of temperature were investigated during coal combustion. An inductively coupled plasma atomic emission spectrometric (ICP-AES) method was developed to continuously measure the heavy metal concentrations quantitatively in flue gas under combustion conditions in order to track the metal release process. This continuous heavy metal analysis system was implemented by coupling it to two types of high temperature reactors: a bubbling fluidized bed reactor and a fixed bed reactor with diameter of 0.1 m and 0.08 m respectively. For the two metals considered in this study (Cd and Zn), the experimental setup was successfully used to continuously monitor the metal vaporization process during coal combustion independent of reactor design, and at different temperatures. Cd is more easily vaporized than Zn during coal combustion. Temperature significantly influences the metal vaporization process. In general, the higher the temperature, the higher the metal vaporization, although the vaporization is not proportional to temperature. In addition to the experimental study, a thermodynamic calculation was carried out to simulate the heavy metal speciation during coal combustion process. The theoretical volatilization tendency is consistent with the experiment. The thermodynamic calculation identified the formation of binary oxides retarding heavy metal vaporization.
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2929
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Schaming D, Costa-Coquelard C, Lampre I, Sorgues S, Erard M, Liu X, Liu J, Sun L, Canny J, Thouvenot R, Ruhlmann L. Formation of a new hybrid complex via coordination interaction between 5,10,15-tritolyl-20-(4- and 3-pyridyl)porphyrin or 5,10,15-triphenyl-20-(4-pyridyl)porphyrin and the α-[MSiW11O39]6− Keggin-type polyoxometalate (M=Co2+ and Ni2+). Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2930
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Liu J, Wang F, Cha Y, Chen ZP, Ding HY. Adiponectin Levels in Non-obese First-degree Relatives of Type 2 Diabetes Patients and Non-diabetic Subjects: A 5-Year Follow-up Study. J Int Med Res 2010; 38:792-802. [PMID: 20819416 DOI: 10.1177/147323001003800306] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This study was designed to investigate adiponectin levels and their relationship to various parameters at baseline and after 5 years in non-obese first-degree relatives of type 2 diabetes patients (FDR group) versus subjects without a family history of diabetes (normal group). Adiponectin levels at baseline were lower in the FDR group versus the normal group. After 5 years, adiponectin levels had fallen significantly in both the FDR (24.3% reduction) and the normal (35.7% reduction) groups. Adiponectin levels were negatively correlated with waist/hip ratio, fasting plasma glucose, carotid intima-media thickness (IMT) and insulin resistance in the FDR group. When adjusted for relevant risk factors, adiponectin was associated with age, high-density lipoprotein-cholesterol and IMT; these factors explained 45% of the variation in adiponectin in the FDR group. In the normal group, multiple regression analyses revealed that low-density lipoprotein-cholesterol and IMT explained 25% of the variability in the adiponectin concentration. In both groups, however, the correlation between adiponectin and IMT just failed to reach statistical significance in this population group. We conclude that adiponectin levels were reduced in non-obese first-degree relatives of patients with type 2 diabetes and normal individuals over a 5-year period. This study supports previous findings that hypoadiponectinaemia is a risk factor for atherosclerosis.
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2931
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Henriksen ST, Liu J, Estiu G, Oltvai ZN, Wiest O. Identification of novel bacterial histidine biosynthesis inhibitors using docking, ensemble rescoring, and whole-cell assays. Bioorg Med Chem 2010; 18:5148-56. [PMID: 20573514 DOI: 10.1016/j.bmc.2010.05.060] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 05/21/2010] [Accepted: 05/23/2010] [Indexed: 12/30/2022]
Abstract
The rapid spread on multidrug-resistant strains of Staphylococcus aureus requires not just novel treatment options, but the development of faster methods for the identification of new hits for drug development. The exponentially increasing speed of computational methods makes a more extensive use in the early stages of drug discovery attractive if sufficient accuracy can be achieved. Computational target identification using systems-level methods suggested the histidine biosynthesis pathway as an attractive target against S. aureus. Potential inhibitors for the pathway were identified through docking, followed by ensemble rescoring, that is sufficiently accurate to justify immediate testing of the identified compounds by whole-cell assays, avoiding the need for time-consuming and often difficult intermediary enzyme assays. This novel strategy is demonstrated for three key enzymes of the S. aureus histidine biosynthesis pathway, which is predicted to be essential for bacterial biomass productions. Virtual screening of a library of approximately 10(6) compounds identified 49 potential inhibitors of three enzymes of this pathway. Eighteen representative compounds were directly tested on three S. aureus- and two Escherichia coli strains in standard disk inhibition assays. Thirteen compounds are inhibitors of some or all of the S. aureus strains, while 14 compounds weakly inhibit growth in one or both E. coli strains. The high hit rate obtained from a fast virtual screen demonstrates the applicability of this novel strategy to the histidine biosynthesis pathway.
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2932
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Wu Z, Ji J, Zuo K, Xie Q, Li H, Liu J, Chen F, Xue C, Ma J, Bi Y. Cloning and phylogenetic analysis of hemagglutinin gene of H9N2 subtype avian influenza virus from different isolates in China during 2002 to 2009. Poult Sci 2010; 89:1136-43. [DOI: 10.3382/ps.2010-00695] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2933
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Yang Y, Liu J, Yang Y, Shi X, Hill W, Hu T. TH-D-201C-04: Quantification of Cellular Response in Myocardial Infarction Using Iron Oxide Particles-Enhanced MRI. Med Phys 2010. [DOI: 10.1118/1.3469552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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2934
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Li C, Barclay H, Hans H, Liu J, Klos R, Carlson G. Accuracy in population estimation: A methodological consideration. ECOLOGICAL COMPLEXITY 2010. [DOI: 10.1016/j.ecocom.2010.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2935
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Uum van CMJ, Stevens SJC, Dreesen JCFM, Drusedau M, Smeets HJM, Hollander-Crombach HTM, Geraedts JPM, Engelen JJM, Coonen E, Ling J, Long X, Liu J, Zhuang G, Cao B, Xu K, Mir P, Rodrigo L, Cervero A, Mercader A, Delgado A, Buendia P, Pellicer A, Rubio C, Martin J, Garcia-Quevedo L, Blanco J, Sarrate Z, Bassas L, Vidal F, Labarta E, Bosch E, Alama P, Rubio C, Remohi J, Pellicer A. Session 42: Preimplantation Genetic Diagnosis. Hum Reprod 2010. [DOI: 10.1093/humrep/de.25.s1.42] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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2936
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Kang H, Quan W, Wang Y, Lin Z, Wu M, Liu H, Liu X, Wang BB, Liu HJ, Gu YQ, Jia XY, Liu J, Chen J, Cheng Y. Structure effects in angle-resolved high-order above-threshold ionization of molecules. PHYSICAL REVIEW LETTERS 2010; 104:203001. [PMID: 20867024 DOI: 10.1103/physrevlett.104.203001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2009] [Indexed: 05/29/2023]
Abstract
We present energy-resolved angular distributions of photoelectrons generated in above-threshold ionization (ATI) of nonaligned diatomic molecules N2 and O2 in high-intensity short laser pulses, with emphasis on the most energetic part of the spectra. The angular distribution for photoelectrons with energy of 10U(p) (U(p): ponderomotive energy), i.e., the plateau cutoff in ATI spectra, is found to be broader in O2 than in N2. Resorting to the analyses from both an S-matrix theory and an intuitive semiclassical model, we attribute the observation to the effect of the ground state molecular orbital structure on high-energy electron emission in strong-field molecular ionization.
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2937
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Liu J, Grierson DS, Moldovan N, Notbohm J, Li S, Jaroenapibal P, O'Connor SD, Sumant AV, Neelakantan N, Carlisle JA, Turner KT, Carpick RW. Preventing nanoscale wear of atomic force microscopy tips through the use of monolithic ultrananocrystalline diamond probes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:1140-1149. [PMID: 20486220 DOI: 10.1002/smll.200901673] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Nanoscale wear is a key limitation of conventional atomic force microscopy (AFM) probes that results in decreased resolution, accuracy, and reproducibility in probe-based imaging, writing, measurement, and nanomanufacturing applications. Diamond is potentially an ideal probe material due to its unrivaled hardness and stiffness, its low friction and wear, and its chemical inertness. However, the manufacture of monolithic diamond probes with consistently shaped small-radius tips has not been previously achieved. The first wafer-level fabrication of monolithic ultrananocrystalline diamond (UNCD) probes with <5-nm grain sizes and smooth tips with radii of 30-40 nm is reported, which are obtained through a combination of microfabrication and hot-filament chemical vapor deposition. Their nanoscale wear resistance under contact-mode scanning conditions is compared with that of conventional silicon nitride (SiN(x)) probes of similar geometry at two different relative humidity levels (approximately 15 and approximately 70%). While SiN(x) probes exhibit significant wear that further increases with humidity, UNCD probes show little measurable wear. The only significant degradation of the UNCD probes observed in one case is associated with removal of the initial seed layer of the UNCD film. The results show the potential of a new material for AFM probes and demonstrate a systematic approach to studying wear at the nanoscale.
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2938
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Mori M, Parsons HA, De la Cruz M, Elsayem AF, Palla SL, Liu J, Li Z, Palmer JL, Bruera E, Fadul NA. Changes in symptoms and inpatient mortality among advanced cancer patients admitted to a palliative care unit in a comprehensive cancer center. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.9065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2939
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Lin R, Fan N, Chen L, Liu J. Phase II study of 5-fluorouracil/leucovorin in combination with paclitaxel and oxaliplatin (POF) in patients with primary refractory or relapsed advanced oesophageal and gastric carcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.4157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2940
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Potter JA, Liu J, Hull R, Bright SD, Higgins S, Bost L, Thaker A, Matthews R, O'Regan R, Gabram-Mendola S. Assessment of clinical trials knowledge and beliefs in cancer patients treated in an urban public hospital serving predominantly African American patients. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e16511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2941
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Bi F, Li Q, Zhou C, Yu J, Cai X, Qiu M, Liu J, Yi C, Luo D, Xu F. Treatment of Chinese patients with advanced gastric cancer with FOLFIRI followed by FOLFOX7 or the reverse sequence. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.tps207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2942
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Kindelberger D, Daniels K, Kantoff E, Atkinson T, Liu J, Campos SM, Berlin ST, Cibas E, Matulonis U. Predictive value of circulating tumor cells for response to therapy in women with recurrent epithelial ovarian cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.5111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2943
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Shonka NA, Gilbert MR, Yung WA, Paio Y, Liu J, Bekele BN, Wen PY, Chen AP, Heymach J, De Groot JF. Use of cytokines to predict on-target toxicity in patients with recurrent glioblastoma treated with aflibercept. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e12507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2944
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Engelstaedter V, Cristea MC, Garber JE, Neuhausen SL, Frankel PH, Sand S, Steele L, Matulonis U, Liu J, Weitzel J. Clinical characteristics and outcomes of BRCA-associated ovarian cancer (OC): Genotype and survival. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.5017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2945
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Parsons HA, Hui D, Nguyen L, Palla SL, Liu J, Yennurajalingam S, Kurzrock R, Bruera E. Timing of palliative care referral and symptom burden in phase I cancer patients: A retrospective cohort study. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.9062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2946
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Matulonis U, Pereira L, Lee H, Campos SM, Liu J, Lee J, Whalen C, Atkinson T, Hill M, Berlin ST. Sequential angiogenic blockade for the treatment of recurrent ovarian cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.5083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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2947
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Tian L, Liu J, Sun X, Gao C, Fan Y, Guo Q. A Protective Effect of Endomorphins on the Oxidative Injury of Islet. Exp Clin Endocrinol Diabetes 2010; 118:467-72. [DOI: 10.1055/s-0030-1252068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2948
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Abbasi RU, Abu-Zayyad T, Al-Seady M, Allen M, Amman JF, Anderson RJ, Archbold G, Belov K, Belz JW, Bergman DR, Blake SA, Brusova OA, Burt GW, Cannon C, Cao Z, Deng W, Fedorova Y, Finley CB, Gray RC, Hanlon WF, Hoffman CM, Holzscheiter MH, Ivanov D, Hughes G, Hüntemeyer P, Ivanov D, Jones BF, Jui CCH, Kim K, Kirn MA, Loh EC, Liu J, Lundquist JP, Maestas MM, Manago N, Marek LJ, Martens K, Matthews JAJ, Matthews JN, Moore SA, O'Neill A, Painter CA, Perera L, Reil K, Riehle R, Roberts M, Rodriguez D, Sasaki N, Schnetzer SR, Scott LM, Sinnis G, Smith JD, Sokolsky P, Song C, Springer RW, Stokes BT, Stratton S, Thomas SB, Thomas JR, Thomson GB, Tupa D, Zech A, Zhang X. Indications of proton-dominated cosmic-ray composition above 1.6 EeV. PHYSICAL REVIEW LETTERS 2010; 104:161101. [PMID: 20482038 DOI: 10.1103/physrevlett.104.161101] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Revised: 03/28/2010] [Indexed: 05/29/2023]
Abstract
We report studies of ultrahigh-energy cosmic-ray composition via analysis of depth of air shower maximum (X(max)), for air shower events collected by the High-Resolution Fly's Eye (HiRes) observatory. The HiRes data are consistent with a constant elongation rate d<X(max)>/d[log(E)] of 47.9+/-6.0(stat)+/-3.2(syst) g/cm2/decade for energies between 1.6 and 63 EeV, and are consistent with a predominantly protonic composition of cosmic rays when interpreted via the QGSJET01 and QGSJET-II high-energy hadronic interaction models. These measurements constrain models in which the galactic-to-extragalactic transition is the cause of the energy spectrum ankle at 4x10(18) eV.
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2949
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Maaz K, Karim S, Usman M, Mumtaz A, Liu J, Duan J, Maqbool M. Effect of crystallographic texture on magnetic characteristics of cobalt nanowires. NANOSCALE RESEARCH LETTERS 2010; 5:1111-1117. [PMID: 20596344 PMCID: PMC2894180 DOI: 10.1007/s11671-010-9610-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 04/09/2010] [Indexed: 05/29/2023]
Abstract
Cobalt nanowires with controlled diameters have been synthesized using electrochemical deposition in etched ion-track polycarbonate membranes. Structural characterization of these nanowires with diameter 70, 90, 120 nm and length 30 μm was performed by scanning electron microscopy, high-resolution transmission electron microscopy, and X-ray diffraction techniques. The as-prepared wires show uniform diameter along the whole length and X-ray diffraction analysis reveals that [002] texture of these wires become more pronounced as diameter is reduced. Magnetic characterization of the nanowires shows a clear difference of squareness and coercivity between parallel and perpendicular orientations of the wires with respect to the applied field direction. In case of parallel applied field, the coercivity has been found to be decreasing with increasing diameter of the wires while in perpendicular case; the coercivity observes lower values for larger diameter. The results are explained by taking into account the magnetocrystalline and shape anisotropies with respect to the applied field and domain transformation mechanism when single domain limit is surpassed.
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2950
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Tan NM, Liu J, Wong DK, Lim JH, Zhang Z, Lu S, Li H, Saw SM, Tong L, Wong TY. Automatic detection of pathological myopia using variational level set. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2010; 2009:3609-12. [PMID: 19964081 DOI: 10.1109/iembs.2009.5333517] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pathological myopia, the seventh leading cause of legal blindness in United States, is a condition caused by pathological axial elongation and eyes that deviates from the normal distribution curve of axial length, resulting in impaired vision. Studies have shown that ocular risks associated with myopia should not be underestimated, and there is a public health need to prevent the onset or progression of myopia. Peripapillary atrophy (PPA) is one of the clinical indicators for pathological myopia. In this paper, we introduce a novel method, to detect pathological myopia via peripapaillary atrophy feature by means of variational level set. This method is a core algorithm of our system, PAMELA, an automated system for the detection of pathological myopia. The proposed method has been tested on 40 images from Singapore Cohort study Of the Risk factors for Myopia (SCORM), producing a 95% accuracy of correct assessment, and a sensitivity and specificity of 0.9 and 1 respectively. The results highlight the potential of PAMELA as a possible clinical tool for objective mass screening of pathological myopia.
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