6,115 results on '"Fan, Q"'
Search Results
2. Atomistic Investigation of Shock-Induced Amorphization within Micro-shear Bands in Hexagonal Close-Packed Titanium
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Meng, Z. C., Wang, K. G., Ali, T., Li, D., Bai, C. G., Xu, D. S., Li, S. J., Feng, A. H., Cao, G. J., Yao, J. H., Fan, Q. B., Wang, H., and Yang, R.
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- 2024
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3. Biocontrol of strawberry Botrytis gray mold and prolong the fruit shelf-life by fumigant Trichoderma spp.
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Fan, Q. S., Lin, H. J., Hu, Y. J., Jin, J., Yan, H. H., and Zhang, R. Q.
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- 2024
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4. Prognostic Factors That Affect Mortality Patients with Acinetobacter baumannii Bloodstream Infection
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Huang C, Gao Y, Lin H, Fan Q, Chen L, and Feng Y
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acinetobacter baumannii ,bloodstream infection ,mortality ,prognostic predictors ,multidrug-resistance. ,Infectious and parasitic diseases ,RC109-216 - Abstract
Chunrong Huang,1,2,* Yulian Gao,1,2,* Hongxia Lin,1– 3,* Qinmei Fan,4,* Ling Chen,1,2 Yun Feng1,2 1Department of Respiratory and Critical Care Medicine, Ruijin Hospital Affiliated Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, People’s Republic of China; 2Institute of Respiratory Diseases, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200025, People’s Republic of China; 3Department of Respiratory and Critical Care Medicine, West China Hospital, West China School of Medicine, Sichuan University, Chengdu, 610000, People’s Republic of China; 4Department of Respiratory and Critical Care Medicine, The First People’s hospital of Jin Zhong, JinZhong, People’s Republic of China*These authors contributed equally to this workCorrespondence: Ling Chen; Yun Feng, Email co840608@hotmail.com; fy01057@163.comBackground: To evaluate the clinical features of patients with Acinetobacter baumannii bloodstream infection (BSI).Methods: Totally 200 inpatients with Acinetobacter baumannii BSI were included, clinical features of Acinetobacter baumannii BSI inpatients between 90-day survival and 90-day mortality groups, between 30-day survival and 30-day mortality groups, between patients infected with multidrug-resistant (MDR group) and sensitive Acinetobacter baumannii (sensitive group) were analyzed. The prognostic factors of 90-day mortality were analyzed by univariate logistic regression and multivariate logistic regression. The survival curve in bloodstream infectious patients with multidrug-resistant (MDR group) and sensitive Acinetobacter baumannii (sensitive group) was analyzed by Kaplan–Meier analysis.Results: The 90-day mortality patients had significantly higher carbapenem-resistant bacterial infection and critical care unit (ICU) admission. The 90-day and 30-day mortality groups showed higher C-reactive protein (CRP) and serum creatinine (Scr) levels and lower red blood cells (RBC) and albumin (ALB) levels than their survival counterparts, respectively. Critical surgery, ICU admission and delayed antibiotic treatment were independently prognostic risk predictors for 90-day mortality in Acinetobacter baumannii BSI patients, while critical surgery and diabetes were independently prognostic risk predictors for 90-day mortality in carbapenem-resistant Acinetobacter baumannii BSI patients. Compared with sensitive group, MDR group showed significantly longer ICU and whole hospital stay, lower levels of lymphocytes, RBC, hemoglobin, lactate dehydrogenase and ALB, higher frequency of infection originating from the skin and skin structure. Moreover, patients in the MDR group had a significantly worse overall survival than the sensitive group.Conclusion: We identified the prognostic factors of Acinetobacter baumannii BSI and carbapenem-resistant Acinetobacter baumannii BSI patients. Critical surgery, ICU admission, delayed antibiotic treatment or diabetes were significantly associated with the mortality of those patients. Moreover, aggressive measures to control MDR Acinetobacter baumannii could lead to improved outcomes. Keywords: Acinetobacter baumannii, bloodstream infection, mortality, prognostic predictors, multidrug-resistance
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- 2024
5. Measurement of the $^{159}$Tb(n, $\gamma$) cross section at the CSNS Back-n facility
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Zhang, S., Li, G., Jiang, W., Wang, D. X., Ren, J., Li, E. T., Huang, M., Tang, J. Y., Ruan, X. C., Wang, H. W., Li, Z. H., Chen, Y. S., Liu, L. X., Li, X. X., Fan, Q. W., Fan, R. R., Hu, X. R., Wang, J. C., Li, X., Niu, 1D. D., Song, N., and Gu, M.
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Nuclear Experiment ,Astrophysics - Solar and Stellar Astrophysics - Abstract
The stellar (n, $\gamma$) cross section data for the mass numbers around A $\approx$ 160 are of key importance to nucleosynthesis in the main component of the slow neutron capture process, which occur in the thermally pulsing asymptotic giant branch (TP--AGB). The new measurement of (n, $\gamma$) cross sections for $^{159}$Tb was performed using the C$_6$D$_6$ detector system at the back streaming white neutron beam line (Back-n) of the China spallation neutron source (CSNS) with neutron energies ranging from 1 eV to 1 MeV. Experimental resonance capture kernels were reported up to 1.2 keV neutron energy with this capture measurement. Maxwellian-averaged cross sections (MACS) were derived from the measured $^{159}$Tb (n, $\gamma$) cross sections at $kT$ = 5 $\sim$ 100 keV and are in good agreement with the recommended data of KADoNiS-v0.3 and JEFF-3.3, while KADoNiS-v1.0 and ENDF-VIII.0 significantly overestimate the present MACS up to 40$\%$ and 20$\%$, respectively. A sensitive test of the s-process nucleosynthesis was also performed with the stellar evolution code MESA. Significant changes in abundances around A $\approx$ 160 were observed between the ENDF/B-VIII.0 and present measured rate of $^{159}$Tb(n, $\gamma$)$^{160}$Tb in the MESA simulation., Comment: 13 pages, 7 figures
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- 2022
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6. Deep underground laboratory measurement of $^{13}$C($\alpha$,$n$)$^{16}$O in the Gamow windows of the $s$- and $i$-processes
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Gao, B., Jiao, T. Y., Li, Y. T., Chen, H., Lin, W. P., An, Z., Ru, L. H., Zhang, Z. C., Tang, X. D., Wang, X. Y., Zhang, N. T., Fang, X., Xie, D. H., Fan, Y. H., Ma, L., Zhang, X., Bai, F., Wang, P., Fan, Y. X., Liu, G., Huang, H. X., Wu, Q., Zhu, Y. B., Chai, J. L., Li, J. Q., Sun, L. T., Wang, S., Cai, J. W., Li, Y. Z., Su, J., Zhang, H., Li, Z. H., Li, Y. J., Li, E. T., Chen, C., Shen, Y. P., Lian, G., Guo, B., Li, X. Y., Zhang, L. Y., He, J. J., Sheng, Y. D., Chen, Y. J., Wang, L. H., Zhang, L., Cao, F. Q., Nan, W., Nan, W. K., Li, G. X., Song, N., Cui, B. Q., Chen, L. H., Ma, R. G., Yan, S. Q., Liao, J. H., Wang, Y. B., Zeng, S., Nan, D., Fan, Q. W., Qi, N. C., Sun, W. L., Guo, X. Y., Zhang, P., Chen, Y. H., Zhou, Y., Zhou, J. F., He, J. R., Shang, C. S., Li, M. C., Kubono, S., Liu, W. P., deBoer, R. J., Wiescher, M., and Pignatari, M.
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Nuclear Experiment - Abstract
The $^{13}$C($\alpha$,$n$)$^{16}$O reaction is the main neutron source for the slow-neutron-capture (s-) process in Asymptotic Giant Branch stars and for the intermediate (i-) process. Direct measurements at astrophysical energies in above-ground laboratories are hindered by the extremely small cross sections and vast cosmic-ray induced background. We performed the first consistent direct measurement in the range of $E_{\rm c.m.}=$0.24 MeV to 1.9 MeV using the accelerators at the China Jinping Underground Laboratory (CJPL) and Sichuan University. Our measurement covers almost the entire i-process Gamow window in which the large uncertainty of the previous experiments has been reduced from 60\% down to 15\%, eliminates the large systematic uncertainty in the extrapolation arising from the inconsistency of existing data sets, and provides a more reliable reaction rate for the studies of the s- and i-processes along with the first direct determination of the alpha strength for the near-threshold state.
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- 2022
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7. Tuning the Dimensions of Coordination Polymers through Halogen Substituent Groups of Ligands
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Peng, H., Wang, Q., Zhao, H., Fan, Q., Sun, L., Li, Q., Zhou, L., and Zhang, J.
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- 2023
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8. Carboxyl group-assisted uniform growth of MnOx nanospheres on poly(acrylonitrile) fiber for enhanced removal of organic pollutants
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Kou, L., Yang, Y., Fan, Q., and Wang, J.
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- 2023
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9. Prognostic Value of Platelet-to-Lymphocyte Ratio Combined with CHA2DS2-VASc Score for Nonvalvular Atrial Fibrillation Induced Cardiogenic Cerebral Embolism
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Fan Q, Gao L, Wang Z, Ndjana Lessomo FY, and Wang G
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nvaf ,cce ,plr ,cha2ds2-vasc score ,lasso model ,Pathology ,RB1-214 ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Qian Fan,1,* Ling Gao,1,* Zhiquan Wang,2,* Fabrice Yves Ndjana Lessomo,2 Gang Wang1 1Department of Cardiology, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong, People’s Republic of China; 2Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, People’s Republic of China*These authors contributed equally to this workCorrespondence: Gang Wang, Email cardio9090@sina.comAim: To determine the predictive significance of the platelet-to-lymphocyte ratio (PLR) combined with the CHA2DS2-VASc score for cardiogenic cerebral embolism (CCE) in patients with nonvalvular atrial fibrillation (NVAF).Methods: A total of 553 patients with NVAF were included in this retrospective study. The general data, PLR, CHA2DS2-VASc score and echocardiography indicators were compared. The risk factors for CCE and the predictive value of PLR and CHA2DS2-VASc were analyzed. Stratified analysis was performed based on the cut-off value. Least absolute shrinkage and selection operator (LASSO) regression analysis was utilized to build a model. The relationship between risk score and different anticoagulants was evaluated.Results: Multiple regression analysis showed hypertension (OR=3.95, 95% CI=2.12– 7.35, p=1.40× 10− 5), diabetes mellitus (OR=2.95, 95% CI=1.57– 5.58, p=7.65× 10− 4), PLR (OR=1.01, 95% CI=1.00– 1.01, p< 10− 6), creatinine level (OR=1.01, 95% CI=1.00– 1.02, p=7.44× 10− 3), left atrial diameter (LAD) (OR=1.90, 95% CI=1.13– 3.19, p=1.51× 10− 2), ejection fraction (EF) (OR=0.93, 95% CI=0.87– 0.98, p=8.06× 10− 3) and CHA2DS2-VASc score (OR=3.79, 95% CI=2.95– 4.85, p< 10− 6) were independent risk factors for CCE. A one-way linear analysis also showed the above seven indexes were significantly correlated with CCE (F=56.4, p< 10− 6). The area under the receiver operating characteristic (ROC) curve of PLR and CHA2DS2-VASc score was 0.760 (95% CI:0.721– 0.800), and 0.855 (95% CI: 0.824– 0.886), respectively. Pearson correlation analysis showed that PLR was correlated with CHA2DS2-VASc score (r=0.331, p< 10− 6). Stratified analysis indicated there was a positive correlation between different risk group (p< 10− 6). Using the LASSO model, a composite indicator displayed differential power for distinguishing CCE with an AUC value of 0.884 (95% CI: 0.857– 0.911). Patients with dabigatran and rivaroxaban exhibited higher risk score than those with warfarin (warfarin vs dabigatran, p=1.40× 10− 2; warfarin vs rivaroxaban p=3.00× 10− 3).Conclusion: PLR and CHA2DS2-VASc score are independent risk factors for CCE with NVAF, and the combination of the two indices can improve the prediction of CCE.Keywords: NVAF, CCE, PLR, CHA2DS2-VASc score, LASSO model
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- 2023
10. Variations in Post-Operative Electrolyte in Coronary Artery Intervention
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Fan Q, Bai Z, Ndjana Lessomo FY, Dong B, Zhong W, Jin F, and Wang Z
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coronary angiography ,electrolytes ,hypokalemia ,hypernatremia ,risk factors ,Medicine (General) ,R5-920 - Abstract
Qian Fan,1,* Zhongmei Bai,2,* Fabrice Yves Ndjana Lessomo,3,* Bingqing Dong,1 Weiqin Zhong,1 Fenglin Jin,1 Zhiquan Wang3 1Department of Cardiology, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong Province, People’s Republic of China; 2Department of Cardiology, The People’s Hospital of Huangmei, Huanggang, Hubei Province, People’s Republic of China; 3Department of Cardiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei Province, People’s Republic of China*These authors contributed equally to this workCorrespondence: Zhiquan Wang; Fenglin Jin, Email 2839515516@qq.com; cardio7788@163.comBackground: Low volume change and minimal trauma observed during angiography are the reason why physicians often overlook any changes affecting pre-operative electrolytes levels after coronary intervention. However, few studies have addressed the issue of electrolyte changes after the coronary intervention. Therefore, our study investigates coronary angiography’s effect on electrolytes and provides the quick identification of groups more prone to electrolyte changes.Methods: From the department of cardiology of the second affiliated hospital of Shandong’s first medical university, 374 patients undergoing coronary angiography were selected. Pre-intervention and post-intervention serums, sodium (Na+), potassium (K+), chloride (Cl−), magnesium (Mg2+) and renal function were analyzed. The correlation between influential factors was also assessed. The association of hypokalemia with short-major adverse cardiac events (MACE) and arrhythmia was evaluated.Results: Among the 374 subjects including 264 patients who had a simple angiography and 110 patients who received coronary artery interventional therapy. A decrease in potassium levels was found in 81.8% of the patients, and post-interventional hypokalemia was observed in 15.0%. After the intervention, the hypokalemia among males was 2.18 times than that of females, and the pre-operative serum potassium level was 3.5mmol/L≤K+< 4.0mmol/L and was 2.09 times than that of K+≥ 4.0 mmol/L, but was not associated with age and either simple coronary angiography or PCI (percutaneous coronary intervention). Hypernatremia was also prevalent in males under 60 years and with pre-operative hypernatremia. Significant variations were found between hypokalemia and influential factors like hypertension, diabetes, and gastrointestinal disease. We also found that there was no obvious correlation between hypokalemia and recurrent angina, heart failure and death, but significantly increased the risk of some arrhythmias.Conclusion: Male patients are more likely to suffer from electrolyte disturbance after coronary intervention. There is a need to emphasize monitoring and managing electrolyte changes to prevent severe complications in the peri-operative period.Keywords: coronary angiography, electrolytes, hypokalemia, hypernatremia, risk factors
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- 2023
11. Characterization of pore water microdynamics and microstructure of clays: The effect of pore fluid chemistry and temperature
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Tian, H.H., Fan, Q., Zhu, Z.Y., and Wei, C.F.
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- 2024
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12. The $^{59}$Fe(n, {\gamma})$^{60}$Fe Cross Section from the Surrogate Ratio Method and Its Effect on the $^{60}$Fe Nucleosynthesis
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Yan, S. Q., Li, X. Y., Nishio, K., Lugaro, M., Li, Z. H., Makii, H., Pignatari, M., Wang, Y. B., Orlandi, R., Hirose, K., Tsukada, K., Mohr, P., Li, G. S., Wang, J. G., Gao, B. S., Han, Y. L., Guo, B., Li, Y. J., Shen, Y. P., Sato, T. K., Ito, Y., Suzaki, F., Su, J., Yang, Y. Y., Wang, J. S., Ma, J. B., Ma, P., Bai, Z., Xu, S. W., Ren, J., Fan, Q. W., Zeng, S., Han, Z. Y., Nan, W., Nan, W. K., Chen, C., Lian, G., Hu, Q., Duan, F. F., Jin, S. Y., Tang, X. D., and Liu, W. P.
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Astrophysics - Astrophysics of Galaxies - Abstract
The long-lived $^{60}$Fe (with a half-life of 2.62 Myr) is a crucial diagnostic of active nucleosynthesis in the Milky Way galaxy and in supernovae near the solar system. The neutron-capture reaction $^{59}$Fe(n,$\gamma$)$^{60}$Fe on $^{59}$Fe (half-life = 44.5 days) is the key reaction for the production of $^{60}$Fe in massive stars. This reaction cross section has been previously constrained by the Coulomb dissociation experiment, which offered partial constraint on the $E$1 $\gamma$-ray strength function but a negligible constraint on the $M$1 and $E$2 components. In this work, for the first time, we use the surrogate ratio method to experimentally determine the $^{59}$Fe(n,$\gamma$)$^{60}$Fe cross sections in which all the components are included. We derived a Maxwellian-averaged cross section of 27.5 $\pm$ 3.5 mb at $kT$= 30 keV and 13.4 $\pm$ 1.7 mb at $kT$= 90 keV, roughly 10 - 20% higher than previous estimates. We analyzed the impact of our new reaction rates in nucleosynthesis models of massive stars and found that uncertainties in the production of $^{60}$Fe from the $^{59}$Fe(n,$\gamma$)$^{60}$Fe rate are at most of 25%. We conclude that stellar physics uncertainties now play a major role in the accurate evaluation of the stellar production of $^{60}$Fe., Comment: 9 pages with 6 figures
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- 2021
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13. MXene-based electrode materials for supercapacitors: Synthesis, properties, and optimization strategies
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Yu, Y., Fan, Q., Li, Z., and Fu, P.
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- 2023
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14. Astrophysical $S_{E2}$ factor of the ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction through the ${}^{12}\mathrm{C}({}^{11}\mathrm{B},{}^{7}\mathrm{Li}){}^{16}\mathrm{O}$ transfer reaction
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Shen, Y. P., Guo, B., Li, Z. H., Li, Y. J., Pang, D. Y., Adhikari, S., An, Z. D., Su, J., Yan, S. Q., Du, X. C., Fan, Q. W., Gan, L., Han, Z. Y., Li, D. H., Li, E. T., Lian, G., Liu, J. C., Ma, T. L., Pei, C. J., Su, Y., Wang, Y. B., Zhou, Y., and Liu, W. P.
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Nuclear Experiment - Abstract
The ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction plays a key role in the evolution of stars with masses of $M >$ 0.55 $M_\odot$. The cross-section of the ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction within the Gamow window ($E_\textrm{c.m.}$ = 300 keV, $T_\textrm9$ = 0.2) is extremely small (about $10^{-17}$ barn), which makes the direct measurement in a ground-based laboratory with existing techniques unfeasible. Up until now, the cross-sections at lower energies can only be extrapolated from the data at higher energies. However, two subthreshold resonances, located at $E_x$ = 7.117 MeV and $E_x$ = 6.917 MeV, make this extrapolation more complicated. In this work, the 6.917 MeV subthreshold resonance in the ${}^{12}\mathrm{C}(\alpha,\gamma){}^{16}\mathrm{O}$ reaction was investigated via the ${}^{12}\mathrm{C}({}^{11}\mathrm{B},{}^{7}\mathrm{Li}){}^{16}\mathrm{O}$ reaction. The experiment was performed using the Q3D magnetic spectrograph at the HI-13 tandem accelerator. We measured the angular distribution of the ${}^{12}\mathrm{C}({}^{11}\mathrm{B},{}^{7}\mathrm{Li}){}^{16}\mathrm{O}$ transfer reaction leading to the 6.917 MeV state. Based on the FRDWBA analysis, we derived the asymptotic normalization coefficient (ANC) of the 6.917 MeV level in $^{16}$O to be (1.10 $\pm$ 0.29) $\times 10^{10}$ fm$^{-1}$, with which the reduced $\alpha$ width was computed to be $18.0\pm4.7$ keV at the channel radius of 6.5 fm. Finally, we calculated the astrophysical $S_{E2}(300)$ factor of the ground-state transitions to be 46.2 $\pm$ 7.7 keV b. The result for the astrophysical $S_{E2}(300)$ factor confirms the values obtained in various direct and indirect measurements and presents an independent examination of the most important data in nuclear astrophysics., Comment: submitted to Physical Review C
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- 2018
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15. Synergistic Effects of Side-Chain Engineering and Fluorination on Small Molecule Acceptors to Simultaneously Broaden Spectral Response and Minimize Voltage Loss for 13.8% Efficiency Organic Solar Cells
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Fan, Q, Su, W, Zhang, M, Wu, J, Jiang, Y, Guo, X, Liu, F, Russell, TP, and Li, Y
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fluorination ,organic solar cells ,power conversion efficiency ,side-chain engineering ,small molecule acceptors - Abstract
Herein, three small molecule (SM)-acceptors (POIT-IC, POIT-IC2F, and POIT-IC4F) are developed by combining the side-chain engineering located on the sp3-hybridized carbon atoms of the fused-ring core and the fluorination of end groups. From ITIC to POIT-IC, POIT-IC2F, and then to POIT-IC4F, the SM-acceptors show gradually broadened absorption spectra, increased maximum extinction coefficient, crystallinity, and electron mobilities due to the synergistic effects of side-chain engineering and fluorination. Compared with nonfluorinated ITIC and POIT-IC, as fluorination broadens the molecular spectra, POIT-IC2F and POIT-IC4F with alkoxyphenyl side chains show less decreased LUMO levels than IT-IC2F and IT-IC4F with alkylphenyl side chains, which are conducive to both higher Voc and Jsc for organic solar cells (OSCs). Combined with polymer donor PM6, the POIT-IC4F-based OSCs achieve a device efficiency of up to 13.8% with a high Voc of 0.91 V and Jsc of 20.9 mA cm−2, which are significantly higher than that of the control OSCs based on ITIC (8.9%), POIT-IC (10.1%), or IT-IC4F (12.2%). An efficiency of 13.8% is one of the highest PCEs reported for the annealing-free OSCs. Our results show that the synergistic effects of side-chain engineering and fluorination on SM-acceptor can simultaneously broaden spectral response and minimize voltage loss of OSCs and ultimately achieve high device efficiency.
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- 2019
16. A Clinical Nursing Care Study on the Prevalence of Rotavirus Infection and Acute Diarrhea in Vaccinated Chinese Pediatric Population from 2019–2022
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Fan Q
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rotavirus infection ,pediatric population ,nursing care ,logistic regression ,Infectious and parasitic diseases ,RC109-216 - Abstract
Qiuhua Fan Clinical Medical Laboratory Center, Shanxi Children’s Hospital (Shanxi Maternal and Child Health Hospital), Taiyuan, 030000, People’s Republic of ChinaCorrespondence: Qiuhua Fan, Clinical Medical Laboratory Center, Shanxi Children’s Hospital (Shanxi Maternal and Child Health Hospital), Taiyuan, 030000, People’s Republic of China, Tel/Fax +86-13-834209526, Email SXFanqiuhua@outlook.comPurpose: To investigate the prevalence of rotavirus infection and acute diarrhea after immunization and further assess the quality of nursing care provided by the nurses to such patients.Methods: A total of 432 children aged 3– 36 months with acute diarrhea between February 2019 and March 2022 were enrolled, and rotavirus testing was performed within 24 h using a rotavirus enzyme immunoassay kit. Clinical characteristics were evaluated, and regression analysis was performed.Results: Eighty vaccinated children (18.5%) were confirmed to have rotavirus infection out of 432 children. The prevalence of rotavirus positivity was the highest at 20– 28 months (22 cases, 24.44%) and 11– 19 months age group (27 cases, 22.50%). There is a significant association between rotavirus infection and hygiene score (p = 0.009). Based on the association with quality of nursing care, rotavirus infection was association with “appropriate care” (p = 0.001).Conclusion: Rotavirus infection was strongly associated with poor hygiene score which may be due to the hygienic nature of the mother and her family. Nursing care assessments revealed a huge gap between nurses and the guardians, which reflects the behavior of Chinese nurses. Thus, an intervention is required by the policymakers for implementing effective strategies of quality nursing for the improvement of the pediatric patients with rotavirus gastroenteritis.Keywords: rotavirus infection, pediatric population, nursing care, logistic regression
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- 2022
17. Classification Method of Coal and Gangue Using Terahertz Time-Domain Spectroscopy, Cluster Analysis and Principal Component Analysis
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Shao, D., Miao, Sh., Fan, Q., Wang, X., Liu, Zh., and Ding, E.
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- 2022
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18. Modelling nitrogen-corrected apparent metabolisable energy requirement for egg production of 3 BW types of Yellow Broiler breeder hens during the egg-laying period
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Gou, Z., Jiang, Z., Zhang, S., Lin, X., Wang, Y., Ruan, D., Fan, Q., Ye, J., Mao, S., and Jiang, S.
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- 2022
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19. Factors Determining the Maximum Recovery Stress of the Ni47Ti44Nb9 Alloy During Constrained Heating
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Cao, X. D., Zhang, Y. H., Sun, M. Y., Zhang, S. W., Wang, Y. Y., Zhang, J., Sun, K. H., Peng, H. B., Chen, J., Yang, Q., Huang, S. K., Wen, Y. H., and Fan, Q. C.
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- 2022
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20. Superhydrophilic PLGA-Graft-PVP/PC Nanofiber Membranes for the Prevention of Epidural Adhesion
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Fan Q, Wu H, and Kong Q
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superhydrophilic membrane ,irradiation graft ,postoperative adhesion ,failed back surgery syndrome ,electrospinning ,Medicine (General) ,R5-920 - Abstract
Qingxin Fan,1,* Hao Wu,1,2,* Qingquan Kong1 1Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, People’s Republic of China; 2Department of Orthopedics, The Second Affiliated Hospital of Dalian Medical University, Dalian, People’s Republic of China*These authors contributed equally to this workCorrespondence: Qingquan Kong, Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, 610041, People’s Republic of China, Email kqqspine@126.comBackground: The frequent occurrence of failed back surgery syndrome (FBSS) seriously affects the quality of life of postoperative lumbar patients. Epidural adhesion is the major factor in FBSS.Purpose: A safe and effective antiadhesion material is urgently needed.Methods: A superhydrophilic PLGA-g-PVP/PC nanofiber membrane (NFm) was prepared by electrospinning. FTIR was performed to identify its successful synthesis. Scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, and water contact angle measurement were performed. CCK-8 assays were performed in primary rabbit fibroblasts (PRFs) and RAW264.7 cells to explore the cytotoxicity of PLGA-g-PVP/PC NFm. Calcein-AM/PI staining was used to measure the adhesion status in PRFs. ELISA was performed to measure the concentrations of TNF-α and IL-10 in RAW264.7 cells. In addition, the anti-epidural adhesion efficacy of the PLGA-g-PVP/PC NFm was determined in a rabbit model of lumbar laminectomy.Results: The PLGA-g-PVP/PC NFm exhibited ultrastrong hydrophilicity and an appropriate degradation rate. Based on the results of the CCK-8 assays, PLGA-g-PVP/PC NFm had no cytotoxicity to PRFs and RAW264.7 cells. Calcein-AM/PI staining showed that PLGA-g-PVP/PC NFm could inhibit PRF adhesion. ELISAs showed that PLGA-g-PVP/PC NFm could attenuate lipopolysaccharide-induced macrophage activation. In vivo experiments further confirmed the favorable anti-epidural adhesion effect of PLGA-g-PVP/PC NFm and the lack of a strong inflammatory response.Conclusion: In this study, PLGA-g-PVP/PC NFm was developed successfully to provide a safe and effective physical barrier for preventing epidural adhesion. PLGA-g-PVP/PC NFm provides a promising strategy for preventing postoperative adhesion and has potential for clinical translation.Keywords: superhydrophilic membrane, irradiation graft, postoperative adhesion, failed back surgery syndrome, electrospinning
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- 2022
21. Widening the Martensitic Hysteresis in Ni47Ti44Nb9 Shape Memory Alloy by Grain Refinement.
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Cao, X. D., Fan, Q. C., Sun, M. Y., Zhang, Y. H., Zhang, S. W., Wang, Y. Y., Chen, J., Yang, Q., Sun, K. H., Peng, H. B., Huang, S. K., and Wen, Y. H.
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MARTENSITIC transformations ,GRAIN refinement ,ENERGY dissipation ,STRAIN energy ,SHAPE memory alloys ,HYSTERESIS - Abstract
Widening the martensitic hysteresis ( T Dhys ) in NiTiNb shape memory alloys (SMAs) holds potential for broadening their working temperature range while enabling the room-temperature storage. In this study, the T Dhys is divided into two parts: the thermal-induced hysteresis ( T hys ) and the deformation-induced hysteresis ( T hys ′ ). In addition to decreasing the martensitic transformation start temperature ( M S ), it is found that grain refinement is an effective method for widening both T hys and T hys ′ of the Ni
47 Ti44 Nb9 alloy, a commercial SMA widely used for shape memory couplings. According to thermodynamic analysis, grain refinement increases the dissipation energy ( Δ E dis ) (caused by thermal friction at martensite/austenite interface), thereby widening T hys . Moreover, the Ni47 Ti44 Nb9 alloy with finer grains has the potential to release more elastic strain energy ( Δ E el ) after deformation, thereby exhibiting a wider T hys ′ . When deforming a large strain, the alloy with finer grains generates more dislocations which stabilize the martensitic phase, thus further widening T hys ′ . [ABSTRACT FROM AUTHOR]- Published
- 2024
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22. Cryo-EM structure of PAO1-ImcA with GMPCPP
- Author
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Zhan, X.L., primary, Zhang, K., additional, Wang, C.C., additional, Fan, Q., additional, Tang, X.J., additional, Zhang, X., additional, Wang, K., additional, Fu, Y., additional, and Liang, H.H., additional
- Published
- 2024
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23. Surface Microseismic Monitoring for Over 30 Wells in Changning Region Sichuan Shale Gas Play, China: The Discoveries
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He, L., additional, Chen, Y, additional, Wen, R., additional, Fan, Q., additional, Heng, D., additional, Huang, Z., additional, Wang, B., additional, and Abdel-Halim, Amro, additional
- Published
- 2024
- Full Text
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24. Tumor imaging of a novel Ho3+-based biocompatible NIR fluorescent fluoride nanoparticle
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Fan, Q., Zhang, G.W., and Peng, B.
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- 2021
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25. Combinatorial study of the structural, optical, and electrical properties of low temperature deposited Cd1-xZnxTe (0 ≤ x ≤ 1) thin films by MOCVD
- Author
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Kartopu, G., Fan, Q., Oklobia, O., and Irvine, S.J.C.
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- 2021
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26. Inter-kingdom modification of metabolic behavior: [GAR + ] Prion induction in Saccharomyces cerevisiae mediated by wine ecosystem bacteria
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Ramakrishnan, V, Walker, GA, Fan, Q, Ogawa, M, Luo, Y, Luong, P, Lucy Joseph, CM, and Bisson, LF
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Saccharomyces ,[GAR(+)] ,prion ,bacterial induction ,Nutrition ,Rare Diseases ,Transmissible Spongiform Encephalopathy ,Ecology ,Evolutionary Biology - Abstract
The yeast Saccharomyces cerevisiae has evolved to dominate grape juice fermentation. A suite of cellular properties, rapid nutrient depletion, production of inhibitory compounds and the metabolic narrowing of the niche, all enable a minor resident of the initial population to dramatically increase its relative biomass in the ecosystem. This dominance of the grape juice environment is fueled by a rapid launch of glycolysis and energy generation mediated by transport of hexoses and an efficient coupling of transport and catabolism. Fermentation occurs in the presence of molecular oxygen as the choice between respiratory or fermentative growth is regulated by the availability of sugar a phenomenon known as glucose or catabolite repression. Induction of the [GAR + ] prion alters the expression of the major hexose transporter active under these conditions, Hxt3, reducing glycolytic capacity. Bacteria present in the grape juice ecosystem were able to induce the [GAR + ] prion in wine strains of S. cerevisiae. This induction reduced fermentation capacity but did not block it entirely. However, dominance factors such as the rapid depletion of amino acids and other nitrogen sources from the environment were impeded enabling greater access to these substrates for the bacteria. Bacteria associated with arrested commercial wine fermentations were able to induce the prion state, and yeast cells isolated from arrested commercial fermentations were found to be [GAR + ] thus confirming the ecological relevance of prion induction. Subsequent analyses demonstrated that the presence of environmental acetic acid could lead to [GAR + ] induction in yeast strains under certain conditions. The induction of the prion enabled yeast growth on non-preferred substrates, oxidation and reduction products of glucose and fructose, present as a consequence of bacterial energy production. In native ecosystems prion induction never exceeded roughly 50-60% of the population of yeast cells suggesting that the population retains the capacity for maximal fermentation. Thus, the bacterial induction of the [GAR + ] prion represents a novel environmental response: the query of the environment for the presence of competing organisms and the biological decision to temper glucose repression and dominance and enter a metabolic state enabling coexistence.
- Published
- 2016
27. Surface electronic structure and evidence of plain s-wave superconductivity in (Li0.8Fe0.2)OHFeSe
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Yan, Y. J., Zhang, W. H., Ren, M. Q., Liu, X., Lu, X. F., Wang, N. Z., Niu, X. H., Fan, Q., Miao, J., Tao, R., Xie, B. P., Chen, X. H., Zhang, T., and Feng, D. L.
- Subjects
Condensed Matter - Superconductivity - Abstract
(Li0.8Fe0.2)OHFeSe is a newly-discovered intercalated iron-selenide superconductor with a Tc above 40 K, which is much higher than the Tc of bulk FeSe (8 K). Here we report a systematic study of (Li0.8Fe0.2)OHFeSe by low temperature scanning tunneling microscopy (STM). We observed two kinds of surface terminations, namely FeSe and (Li0.8Fe0.2)OH surfaces. On the FeSe surface, the superconducting state is fully gapped with double coherence peaks, and a vortex core state with split peaks near EF is observed. Through quasi-particle interference (QPI) measurements, we clearly observed intra- and inter-pocket scatterings in between the electron pockets at the M point, as well as some evidence of scattering that connects gamma and M points. Upon applying magnetic field, the QPI intensity of all the scattering channels are found to behave similarly. Furthermore, we studied impurity effects on the superconductivity by investigating intentionally introduced impurities and intrinsic defects. We observed that magnetic impurities such as Cr adatoms can induce in-gap states and suppress superconductivity. However, nonmagnetic impurities such as Zn adatoms do not induce visible in-gap states. Meanwhile, we show that Zn adatoms can induce in-gap states in thick FeSe films, which is believed to have an (s+-)wave pairing symmetry. Our experimental results suggest it is likely that (Li0.8Fe0.2)OHFeSe is a plain s-wave superconductor, whose order parameter has the same sign on all Fermi surface sections., Comment: 18 pages, 9 figures, supplementary information included
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- 2015
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28. Plain s-wave superconductivity in single-layer FeSe on SrTiO3 probed by scanning tunneling microscopy
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Fan, Q., Zhang, W. H., Liu, X., Yan, Y. J., Ren, M. Q., Peng, R., Xu, H. C., Xie, B. P., Hu, J. P., Zhang, T., and Feng, D. L.
- Subjects
Condensed Matter - Superconductivity - Abstract
Single-layer FeSe film on SrTiO3(001) was recently found to be the champion of interfacial superconducting systems, with a much enhanced superconductivity than the bulk iron-based superconductors. Its superconducting mechanism is of great interest. Although the film has a simple Fermi surface topology, its pairing symmetry is unsettled. Here by using low-temperature scanning tunneling microscopy (STM), we systematically investigated the superconductivity of single-layer FeSe/SrTiO3(001) films. We observed fully gapped tunneling spectrum and magnetic vortex lattice in the film. Quasi-particle interference (QPI) patterns reveal scatterings between and within the electron pockets, and put constraints on possible pairing symmetries. By introducing impurity atoms onto the sample, we show that the magnetic impurities (Cr, Mn) can locally suppress the superconductivity but the non-magnetic impurities (Zn, Ag and K) cannot. Our results indicate that single-layer FeSe/SrTiO3 has a plain s-wave paring symmetry whose order parameter has the same phase on all Fermi surface sections., Comment: 25 pages, 16 figures
- Published
- 2015
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29. Scanning tunneling microscopy study of the possible topological surface states in BiTeCl
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Yan, Y. J., Ren, M. Q., Liu, X., Huang, Z. C., Jiang, J., Fan, Q., Miao, J., Xie, B. P., Zhang, T., and Feng, D. L.
- Subjects
Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed Matter - Strongly Correlated Electrons - Abstract
Recently, the non-centrosymmetric bismuth tellurohalides such as BiTeCl are being studied as possible candidates of topological insulators. While some photoemission studies showed that BiTeCl is an inversion asymmetric topological insulator, others showed that it is a normal semiconductor with Rashba splitting. Meanwhile, first-principle calculationsfailed to confirm the existence of topological surface states in BiTeCl so far. Therefore, the topological nature of BiTeCl requires further investigation. Here we report low temperature scanning tunneling microscopy study on the surface states of BiTeCl single crystals. On the tellurium-terminated surfaces with low defect density, strong evidences for topological surface states are found in the quasi-particle interference patterns generated by the scattering of these states, both in the anisotropy of the scattering vectors and the fast decay of the interference near step edges. Meanwhile, on samples with much higher defect densities, we observed surface states that behave differently. Our results help to resolve the current controversy on the topological nature of BiTeCl., Comment: 13pages,4figures
- Published
- 2015
30. The weak electronic correlations and absence of heavy Fermion state in KNi$_2$Se$_2$
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Fan, Q., Shen, X. P., Li, M. Y., Shen, D. W., Li, W., Xie, X. M., Ge, Q. Q., Ye, Z. R., Tan, S. Y., Niu, X. H., Xie, B. P., and Feng, D. L.
- Subjects
Condensed Matter - Superconductivity - Abstract
We have studied the low-lying electronic structure of a new ThCr$_2$Si$_2$-type superconductor KNi$_2$Se$_2$ with angle-resolved photoemission spectroscopy. Three bands intersect the Fermi level, forming complicated Fermi surface topology, which is sharply different from its isostructural superconductor K$_x$Fe$_{2-y}$Se$_2$. The Fermi surface shows weak variation along the $k_z$ direction, indicating its quasi-two-dimensional nature. Further comparison with the density functional theory calculations demonstrates that there exist relatively weak correlations and substantial hybridization of the Ni 3$d$ and the Se 4$p$ orbitals in the low-lying electronic structure. Our results indicate that the large density of states at the Fermi energy leads to the reported mass enhancement based on the specific heat measurements. Moreover, no anomaly is observed in the spectra when entering the fluctuating charge density wave state reported earlier., Comment: 7 pages, 6 figures
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- 2014
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31. Designing a Novel Trigonal Silicon Material: First-Principles Calculations.
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FAN, Q., LI, Y., YANG, R., YU, X., and YUN, S.
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- *
THERMAL conductivity , *BAND gaps , *SEMICONDUCTOR materials , *HEAT capacity , *SILICON - Abstract
As the cornerstone of many high-technological things, semiconductor silicon material has been widely studied in the past few decades. The present study introduces a new type of silicon allotrope named tri-Si18, belonging to the space group P3221. Based on first-principles calculation, its structure characteristics, stability, electronic properties, and thermal conductivity are systematically investigated and analyzed. The elastic constant and phonon spectrum of tri-Si18 demonstrate its mechanics and dynamics stability. The relative enthalpy of tri-Si18 is only 0.089 eV/atom, which is more favorable than that of most silicon allotropes. Furthermore, the tri-Si18 exhibits elastic anisotropy, particularly in the direction of [100], [010], [110], and [111]. In addition, tri-Si18 is a semiconductor material with an indirect band gap of 1.770 eV. More interestingly, the minimum thermal conductivity of tri-Si18 reached 1.10 W/(K cm), which is greater than that of I-4 Si, C2=m-20 Si, P2221 Si, Amm2 Si, Pm-3m Si, and Si64. It is suggested that if tri-Si18 is used to make microelectronic devices, they may have better heat dissipation capacity. Due to its lower relative enthalpy and taller minimum thermal conductivity, tri-Si18 can be used in a diverse variety of optoelectronic materials and in electronic device fabrication. [ABSTRACT FROM AUTHOR]
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- 2024
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32. Effect of Vacancy on Physical Properties of Cmcm Si24.
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JIA, M., FAN, Q., HAO, B., ZHAO, Y., SONG, Y., and YUN, S.
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- *
ELECTRONIC band structure , *LATTICE constants , *DIFFRACTION patterns , *BAND gaps , *X-ray diffraction - Abstract
Researchers recently synthesized a new orthorhombic allotrope of silicon, namely Cmcm Si24. This work studied the effect of one vacancy for Cmcm Si24 on structural, electronic, and mechanical anisotropy properties by the first principle calculation. The lattice parameters of Cmcm Si24:V are the same as Cmcm Si24, but the density of Cmcm Si24:V is larger than that of Cmcm Si24. Moreover, the values of elastic moduli for Cmcm Si24:V are smaller than for Cmcm Si24. The Cmcm Si24:V has mechanical stability and anisotropy and has lower formation energy than diamond-Si. The analysis of the band structures shows that Cmcm Si24 is an indirect band gap material, and the value of the band gap is 1.08 eV. In particular, electronic band structures of Cmcm Si24:V exhibit metallic characteristics. Furthermore, the electron localization function indicated strong covalent silicon--silicon bonds in Cmcm Si24 and Cmcm Si24:V. In addition, the effective mass of electrons and holes of Cmcm Si24 is smaller than that of diamond-Si along the a direction, and larger than that along the b and c directions. Finally, the X-ray diffraction patterns for Cmcm Si24 and Cmcm Si24:V are very close after 13:84°. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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33. Effect of Vacancy on Physical Properties of Cmcm Si24.
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JIA, M., FAN, Q., HAO, B., ZHAO, Y., SONG, Y., and YUN, S.
- Subjects
ELECTRONIC band structure ,LATTICE constants ,DIFFRACTION patterns ,BAND gaps ,X-ray diffraction - Abstract
Researchers recently synthesized a new orthorhombic allotrope of silicon, namely Cmcm Si
24 . This work studied the effect of one vacancy for Cmcm Si24 on structural, electronic, and mechanical anisotropy properties by the first principle calculation. The lattice parameters of Cmcm Si24 :V are the same as Cmcm Si24 , but the density of Cmcm Si24 :V is larger than that of Cmcm Si24 . Moreover, the values of elastic moduli for Cmcm Si24 :V are smaller than for Cmcm Si24 . The Cmcm Si24 :V has mechanical stability and anisotropy and has lower formation energy than diamond-Si. The analysis of the band structures shows that Cmcm Si24 is an indirect band gap material, and the value of the band gap is 1.08 eV. In particular, electronic band structures of Cmcm Si24 :V exhibit metallic characteristics. Furthermore, the electron localization function indicated strong covalent silicon--silicon bonds in Cmcm Si24 and Cmcm Si24 :V. In addition, the effective mass of electrons and holes of Cmcm Si24 is smaller than that of diamond-Si along the a direction, and larger than that along the b and c directions. Finally, the X-ray diffraction patterns for Cmcm Si24 and Cmcm Si24 :V are very close after 13:84°. [ABSTRACT FROM AUTHOR]- Published
- 2024
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34. CircRNA circUGGT2 Contributes to Hepatocellular Carcinoma Development via Regulation of the miR-526b-5p/RAB1A Axis
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Kong Q, Fan Q, Ma X, Li J, and Ma R
- Subjects
hcc ,circuggt2 ,mir-526b-5p ,rab1a ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Qingling Kong,1 Qing Fan,2 Xianbin Ma,3 Jian Li,4 Rong Ma5 1Office of Hospital Infection Control, People’s Hospital of Rizhao, Rizhao 276826, People’s Republic of China; 2Department of Hemodialysis, People’s Hospital of Rizhao, Rizhao 276826, People’s Republic of China; 3Department of Clinical Laboratory, People’s Hospital of Rizhao, Rizhao 276826, People’s Republic of China; 4Department of Interventional Radiology, People’s Hospital of Rizhao, Rizhao 276826, People’s Republic of China; 5Department of General Medicine, People’s Hospital of Rizhao, Rizhao 276826, People’s Republic of ChinaCorrespondence: Rong Ma Email rz3366978@163.comBackground: Hepatocellular carcinoma (HCC) is a common malignant tumor in the world. Circular RNA hsa_circ_0008274 (circUGGT2) is reported to be upregulated in HCC tissues. Notwithstanding, the role and regulatory mechanism of circUGGT2 in HCC are indistinct.Methods: Quantitative real-time polymerase chain reaction (qRT-PCR) was implemented to examine the levels of circUGGT2, microRNA (miR)-526b-5p, and ras-related protein Rab-1A (RAB1A) mRNA in HCC tissues and cells. Cell proliferation and colony formation were assessed with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromide (MTT) or colony formation assays. The levels of cyclin D1, proliferating cell nuclear antigen (PCNA), and RAB1A were detected with Western blotting. Cell cycle progression, migration, and invasion were evaluated by using flow cytometry or transwell assays. The relationship between circUGGT2 or RAB1A and miR-526b-5p was verified via dual-luciferase reporter and/or RNA pull-down assays. Xenograft assay was executed to confirm the role of circUGGT2 in vivo.Results: We observed that circUGGT2 and RAB1A were upregulated while miR-526b-5p was downregulated in HCC tissues and cells. CircUGGT2 silencing suppressed tumor growth in vivo and curbed proliferation, colony formation, cell cycle progression, migration, and invasion of HCC cells in vitro. Mechanically, circUGGT2 regulated RAB1A expression via competitively binding to miR-526b-5p. Also, the inhibitory influence of circUGGT2 silencing on the malignancy of HCC cells was overturned by miR-526b-5p inhibitor. Furthermore, RAB1A overexpression reversed the suppressive influence of miR-526b-5p mimic on the malignancy of HCC cells.Conclusion: CircUGGT2 silencing inhibited HCC development via modulating the miR-526b-5p/RAB1A axis, providing a possible target for HCC treatment.Keywords: HCC, circUGGT2, miR-526b-5p, RAB1A
- Published
- 2020
35. Microgeographic Heterogeneity of Border Malaria During Elimination Phase, Yunnan Province, China, 2011-2013
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Xu, X, Zhou, G, Wang, Y, Hu, Y, Ruan, Y, Fan, Q, Yang, Z, Yan, G, and Cui, L
- Published
- 2016
36. Properties and structural features of native and modified proteins of concentrates from white and brown rice
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Kolpakova, V. V., primary, Fan, Q. Ch., additional, Gaivoronskaya, I. S., additional, and Chumikina, L. V., additional
- Published
- 2023
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37. A Novel Planning and Delivery Technology: Dose, Dose Rate and Linear Energy Transfer (LET) Optimization Based on Spot-Scanning Proton Arc Therapy FLASH (SPLASHLET)
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Liu, G., primary, Fan, Q., additional, Zhao, L., additional, Li, X., additional, Lu, X., additional, Dai, S., additional, Zhang, S., additional, Yang, K., additional, and Ding, X., additional
- Published
- 2023
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38. 959P Combination therapy of envafolimab and suvemcitug in patients with hepatocellular carcinoma (HCC): Results from a phase II clinical trial
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Ma, L., primary, Zhang, Y., additional, Fang, Y., additional, Hao, C., additional, Fan, Q., additional, Jiang, D., additional, Lu, L., additional, Su, F., additional, Yang, C., additional, Liu, Z., additional, Tian, J., additional, Sun, X., additional, Sun, S., additional, and Cheng, Y., additional
- Published
- 2023
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39. 1032P A phase II study of sintilimab plus IBI310 for Epstein-Barr virus (EBV)-associated gastric cancer
- Author
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Peng, Z., primary, Liu, B., additional, Wei, J., additional, Wang, C., additional, Zhang, Y., additional, Shu, Y., additional, Liu, L., additional, Li, J., additional, Zhu, X., additional, Fan, Q., additional, Feng, Y., additional, Luo, Y., additional, Li, L., additional, Zhou, H., additional, and Shen, L., additional
- Published
- 2023
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- View/download PDF
40. Proton widths of the low-lying 16F states from the 15N(7Li, 6Li)16N reaction
- Author
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Wu, Z. D., Guo, B., Li, Z. H., Li, Y. J., Su, J., Pang, D. Y., Yan, S. Q., Li, E. T., Bai, X. X., Du, X. C., Fan, Q. W., Gan, L., He, J. J., Jin, S. J., Jing, L., Li, L., Li, Z. C., Lian, G., Liu, J. C., Shen, Y. P., Wang, Y. B., Yu, X. Q., Zeng, S., Zhang, D. H., Zhang, L. Y., Zhang, W. J., and Liu, W. P.
- Subjects
Nuclear Experiment - Abstract
All the 16F levels are unbound by proton emission. To date the four low-lying 16F levels below 1 MeV have been experimentally identified with well established spin-parity values and excitation energies with an accuracy of 4 - 6 keV. However, there are still considerable discrepancies for their level widths. The present work aims to explore these level widths through an independent method. The angular distributions of the 15N(7Li, 6Li)16N reaction leading to the first four states in 16N were measured using a high-precision Q3D magnetic spectrograph. The neutron spectroscopic factors and the asymptotic normalization coefficients for these states in 16N were then derived based on distorted wave Born approximation analysis. The proton widths of the four low-lying resonant states in 16F were obtained according to charge symmetry of strong interaction., Comment: 14 pages, 6 figures, 4 tables
- Published
- 2014
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41. Genetic diversity of Plasmodium falciparum histidine-rich protein 2 in the China-Myanmar border area
- Author
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Li, P, Xing, H, Zhao, Z, Yang, Z, Cao, Y, Li, W, Yan, G, Sattabongkot, J, Cui, L, and Fan, Q
- Abstract
© 2015 Elsevier B.V. Deletion of the Plasmodium falciparum histidine-rich protein 2 (pfhrp2) gene may affect the performance of PfHRP2-based rapid diagnostic tests (RDTs). Here we investigated the genetic diversity of the pfhrp2 gene in clinical parasite isolates collected in recent years from the China-Myanmar border area. Deletion of pfhrp2 has been identified in 4 out of 97 parasite isolates. Sequencing of the pfhrp2 exon2 from 67 isolates revealed a high level of genetic diversity in pfhrp2, which is reflected in the presence of many repeat types and their variants, as well as variable copy numbers and different arrangements of these repeats in parasite isolates. In addition, we observed pfhrp3 deletion in three of the four parasites harboring pfhrp2 deletion, suggesting of double deletions of both genes in these three isolates. Analysis of two cases, which were P. falciparum-positive by microscopy and PCR but failed by two PfHRP2-based RDTs, did not find pfhrp2 deletion. Further correlational studies of pfhrp2 polymorphisms with detection sensitivity are needed to identify factors influencing the performance of RDTs in malaria-endemic areas.
- Published
- 2015
42. Spectroscopic factors for low-lying 16N levels and the astrophysical 15N(n,gamma)16N reaction rate
- Author
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Guo, B., Li, Z. H., Li, Y. J., Su, J., Pang, D. Y., Yan, S. Q., Wu, Z. D., Li, E. T., Bai, X. X., Du, X. C., Fan, Q. W., Gan, L., He, J. J., Jin, S. J., Jing, L., Li, L., Li, Z. C., Lian, G., Liu, J. C., Shen, Y. P., Wang, Y. B., Yu, X. Q., Zeng, S., Zhang, L. Y., Zhang, W. J., and Liu, W. P.
- Subjects
Nuclear Experiment - Abstract
Fluorine is a key element for nucleosynthetic studies since it is extremely sensitive to the physical conditions within stars. The astrophysical site to produce fluorine is suggested to be asymptotic giant branch (AGB) stars. In these stars the 15N(n, g)16N reaction could affect the abundance of fluorine by competing with 15N(a, g)19F. The 15N(n, g)16N reaction rate depends directly on the neutron spectroscopic factors of the low-lying states in 16N. The angular distributions of the 15N(7Li, 6Li)16N reaction populating the ground state and the first three excited states in 16N are measured using a Q3D magnetic spectrograph and are used to derive the spectroscopic factors of these states based on distorted wave Born approximation (DWBA) analysis. The spectroscopic factors of these four states are extracted to be 0.96+-0.09, 0.69+-0.09, 0.84+-0.08 and 0.65+-0.08, respectively. Based on the new spectroscopic factors we derive the 15N(n,g)16N reaction rate. The accuracy and precision of the spectroscopic factors are enhanced due to the first application of high-precision magnetic spectrograph for resolving the closely-spaced 16N levels which can not be achieved in most recent measurement. The present result demonstrates that two levels corresponding to neutron transfers to the 2s1/2 orbit in 16N are not so good single-particle levels although 15N is a closed neutron-shell nucleus. This finding is contrary to the shell model expectation. The present work also provides an independent examination to shed some light on the existing discrepancies in the spectroscopic factors and the 15N(n, g)16N rate., Comment: 13 pages, 4 figures, 2 tables
- Published
- 2013
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43. Plasma cfDNA as a Potential Biomarker to Evaluate the Efficacy of Chemotherapy in Gastric Cancer
- Author
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Zhong Y, Fan Q, Zhou Z, Wang Y, He K, and Lu J
- Subjects
advanced gastric cancer ,cfdna ,tumor marker ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Yuejiao Zhong,1,* Qingyu Fan,2,* Zhaofei Zhou,1 Yajing Wang,1 Kang He,1 Jianwei Lu1 1Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research and the Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, People’s Republic of China; 2Xuzhou Medical University Graduate School, Xuzhou, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jianwei Lu Email lujw@medmail.com.cnObjective: To investigate the clinical value of plasma cell-free DNA (cfDNA) as a potential biomarker for advanced gastric cancer (GC).Patients and Methods: One hundred and six cases of advanced gastric cancer patients receiving chemotherapy were selected as study objects. Another 40 healthy volunteers were included as control groups. Plasma cfDNA concentration was detected by (SuperbDNATM) hybridization. Changes in cfDNA concentration during chemotherapy in patients with gastric cancer whose efficacy was assessed as partial response (PR), stable disease (SD) and disease progression (PD) were analyzed respectively. The relationship between the level of cfDNA and the efficacy of chemotherapy and clinical characteristics was also explored. In addition, cfDNA and other tumor markers were subjected to specificity and sensitivity analyses using ROC.Results: cfDNA concentration in advanced GC patients was significantly higher than that in healthy controls (P< 0.05). The concentration of plasma cfDNA in patients with PD showed an increasing trend over time. The concentration of plasma cfDNA in patients with therapeutic effect of PR decreased over time. In patients with therapeutic effect of SD, the plasma DNA concentration showed a stable trend over time. There was no significant correlation between cfDNA concentration and factors including gender, age, pathological type, CA724, CA125,CA199, AFP and CEA. ROC results showed that the area under the curve of cfDNA was larger than other tumor markers.Conclusion: Plasma cfDNA concentration was significantly increased in patients with gastric cancer, and its diagnostic efficacy was superior to that of traditional tumor markers. It can be used as a tumor biomarker to monitor the efficacy of chemotherapy for gastric cancer.Keywords: advanced gastric cancer, cfDNA, tumor marker
- Published
- 2020
44. Phase Transformation and Recovery Stress of Ni47Ti44Nb9 Alloy During Constrained Heating and Cooling
- Author
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Fan, Q. C., Sun, M. Y., Wang, Y. Y., Sun, K. H., Cao, X. D., Peng, H. B., Huang, S. K., Zhang, Y. H., and Wen, Y. H.
- Published
- 2020
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45. Clinical efficacy of dihydroartemisinin-piperaquine for the treatment of uncomplicated plasmodium falciparum malaria at the China-Myanmar Border
- Author
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Wang, Y, Yang, Z, Yuan, L, Zhou, G, Parker, D, Lee, MC, Yan, G, Fan, Q, Xiao, Y, Cao, Y, and Cui, L
- Abstract
Copyright © 2015 by The American Society of Tropical Medicine and Hygiene. Artemisinin-based combination therapies (ACTs) are currently used as the first-line therapy for uncomplicated Plasmodium falciparum malaria. However, the recent emergence and/or spread of artemisinin resistance in parts of Greater Mekong Subregion (GMS) of southeast Asia requires close monitoring of the therapeutic efficacy of ACTs. This study was conducted from March 2012 to December 2013 in four clinics and seven villages along the China-Myanmar border. A total of 109 patients with uncomplicated falciparum malaria were treated with dihydroartemisinin-piperaquine (DP) and followed up on days 1, 2, 3, 7, 14, 21, 28, and 42 after treatment. A total of 71 patients (22 children and 49 adults) completed the 42-day follow-up. DP remained highly efficacious for treatment of uncomplicated falciparum malaria with an overall 42-day cure rate of 100%. The day 3 parasite-positive rate was 7.04% (5/71).Within 14 days of treatment, a total of 13 (18.31%) patients had detectable gametocytes and a large proportion of these were persistent from the first three days of treatment. The presence of gametocytes in patients through 14 days after DP treatment suggests that the incorporation of a single dose of primaquine for clearing gametocytemia should be considered for blocking parasite transmission.
- Published
- 2015
46. Microgeography and molecular epidemiology of malaria at the Thailand-Myanmar border in the malaria pre-elimination phase
- Author
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Parker, DM, Matthews, SA, Yan, G, Zhou, G, Lee, MC, Sirichaisinthop, J, Kiattibutr, K, Fan, Q, Li, P, Sattabongkot, J, and Cui, L
- Subjects
Tropical Medicine ,Medical Microbiology ,Public Health and Health Services ,Microbiology - Abstract
© 2015 Parker et al.; licensee BioMed Central. Background: Endemic malaria in Thailand continues to only exist along international borders. This pattern is frequently attributed to importation of malaria from surrounding nations. A microgeographical approach was used to investigate malaria cases in a study village along the Thailand-Myanmar border. Methods: Three mass blood surveys were conducted during the study period (July and December 2011, and May 2012) and were matched to a cohort-based demographic surveillance system. Blood slides and filter papers were taken from each participant. Slides were cross-verified by an expert microscopist and filter papers were analysed using nested PCR. Cases were then mapped to households and analysed using spatial statistics. A risk factor analysis was done using mixed effects logistic regression. Results: In total, 55 Plasmodium vivax and 20 Plasmodium falciparum cases (out of 547 participants) were detected through PCR, compared to six and two (respectively) cases detected by field microscopy. The single largest risk factor for infection was citizenship. Many study participants were ethnic Karen people with no citizenship in either Thailand or Myanmar. This subpopulation had over eight times the odds of malaria infection when compared to Thai citizens. Cases also appeared to cluster near a major drainage system and year-round water source within the study village. Conclusion: This research indicates that many cases of malaria remain undiagnosed in the region. The spatial and demographic clustering of cases in a sub-group of the population indicates either transmission within the Thai village or shared exposure to malaria vectors outside of the village. While it is possible that malaria is imported to Thailand from Myanmar, the existence of undetected infections, coupled with an ecological setting that is conducive to malaria transmission, means that indigenous transmission could also occur on the Thai side of the border. Improved, timely, and active case detection is warranted.
- Published
- 2015
47. The unique electronic structure of Ca10(Pt4As8)(Fe2-xPtxAs2)5 with metallic Pt4As8 layers
- Author
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Shen, X. P., Chen, S. D., Ge, Q. Q., Ye, Z. R., Chen, F., Xu, H. C., Tan, S. Y., Niu, X. H., Fan, Q., Xie, B. P., and Feng, D. L.
- Subjects
Condensed Matter - Superconductivity - Abstract
We studied the low-lying electronic structure of the newly discovered iron-platinum-arsenide superconductor, Ca10(Pt4As8)(Fe2-xPtxAs2)5 (Tc=22 K) with angle-resolved photoemission spectroscopy. We found that the Pt4As8 layer contributes to a small electron-like Fermi surface, indicative of metallic charge reservoir layers that are rare for iron based superconductors. Moreover, the electronic structure of the FeAs-layers resembles those of other prototype iron pnictides to a large extent. However, there is only dxy-orbital originated hole-like Fermi surface near the zone center, which is rather unique for an iron pnictide superconductor with relatively high superconducting transition temperature; and the dxz and dyz originated bands are not degenerate at the zone center. Furthermore, all bands near the Fermi energy show negligible kz dependence, indicating the strong two-dimensional nature of this material. Our results indicate this material possesses rather unique electronic structure, which enriches our current knowledge of iron based superconductors., Comment: 6 pages, 4 figures
- Published
- 2013
48. Orbital selective correlations between nesting/scattering/Lifshitz transition and the superconductivity in AFe1-xCoxAs (A=Li, Na)
- Author
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Ye, Z. R., Zhang, Y., Xu, M., Ge, Q. Q., Fan, Q., Chen, F., Jiang, J., Wang, P. S., Dai, J., Yu, W., Xie, B. P., and Feng, D. L.
- Subjects
Condensed Matter - Superconductivity - Abstract
The correlations between the superconductivity in iron pnictides and their electronic structures are elusive and controversial so far. Here through angle-resolved photoemission spectroscopy measurements, we show that such correlations are rather distinct in AFe$_{1-x}$Co$_x$As (A=Li, Na), but only after one realizes that they are orbital selective. We found that the superconductivity is enhanced by the Fermi surface nesting, but only when it is between $d_{xz}/d_{yz}$ Fermi surfaces, while for the $d_{xy}$ orbital, even nearly perfect Fermi surface nesting could not induce superconductivity. Moreover, the superconductivity is completely suppressed just when the $d_{xz}/d_{yz}$ hole pockets sink below Fermi energy and evolve into an electron pocket. Our results thus establish the orbital selective relation between the Fermiology and the superconductivity in iron-based superconductors, and substantiate the critical role of the $d_{xz}/d_{yz}$ orbitals. Furthermore, around the zone center, we found that the $d_{xz}/d_{yz}$-based bands are much less sensitive to impurity scattering than the $d_{xy}$-based band, which explains the robust superconductivity against heavy doping in iron-based superconductors., Comment: Part of the paper, together with other new data, were rearranged as a new paper. Please see arXiv:1404.6716
- Published
- 2013
49. Thermo-electrical coupling simulation of powder mixed EDM SiC/Al functionally graded materials
- Author
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Tang, L., Ji, Y., Ren, L., Zhai, K. G., Huang, T. Q., Fan, Q. M., Zhang, J. J., and Liu, J.
- Published
- 2019
- Full Text
- View/download PDF
50. Interface-induced superconductivity and strain-dependent spin density wave in FeSe/SrTiO3 thin films
- Author
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Tan, S. Y., Xia, M., Zhang, Y., Ye, Z. R., Chen, F., Xie, X., Peng, R., Xu, D. F., Fan, Q., Xu, H. C., Juan, J., Zhang, T., Lai, X. C., Xiang, T., Hu, J. P., Xie, B. P., and Feng, D. L.
- Subjects
Condensed Matter - Superconductivity ,Condensed Matter - Materials Science ,Condensed Matter - Strongly Correlated Electrons - Abstract
The record of superconducting transition temperature(Tc) has long been 56K for the iron-based high temperature superconductors(Fe-HTS's). Recently, in single layer FeSe films grown on SrTiO3 substrate, signs for a new 65K Tc record are reported. Here with in-situ photoemission measurements, we substantiate the presence of the spin density wave(SDW) in FeSe films, a key ingredient of Fe-HTS that was missed in FeSe before, which weakens with increased thickness or reduced strain. We demonstrate that the superconductivity occurs when the electrons transferred from the oxygen-vacant substrate suppress the otherwise most pronounced SDW in single layer FeSe. Besides providing a comprehensive understanding of FeSe films and directions to further enhance its Tc, we establish the phase diagram of FeSe vs. lattice constant that contains all the essential physics of Fe-HTS's. With the simplest structure, cleanest composition and single tuning parameter, it is ideal for testing theories of Fe-HTS's., Comment: 6 pages,5 figures
- Published
- 2013
- Full Text
- View/download PDF
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