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Zhang X, Lan T, Jiang H, Ye K, Dai Z. Bacterial community driven nitrogen cycling in coastal sediments of intertidal transition zone. Sci Total Environ 2024; 908:168299. [PMID: 37926266 DOI: 10.1016/j.scitotenv.2023.168299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/14/2023] [Accepted: 11/01/2023] [Indexed: 11/07/2023]
Abstract
Microorganisms inhabiting in coastal sediments significantly affect the nitrogen cycling in coastal waters and ecosystems. However, the bacterial community that related to the key active nitrogen transformation processes in intertidal transition zone are still not understood. Across a long flat intertidal zone at depths from 0 to 3 m in Daya Bay, China, the bacterial communities in sediments and their driven nitrogen cycling potential were evaluated with environmental factors and 16S rRNA sequencing. The results showed that the intertidal zone is a divide for environmental factors as pH, salinity and C/N ratio, instead of an average shift from freshwater to salt water. At the same time, the environmental factors influenced the abundance of bacterial community related to nitrogen cycling. Across the intertidal zone, the dominant nitrogen transformation processes were different. At the high tide and middle tide sites, the primary nitrogen cycling process was nitrification that worked with Nitrosomonadaceae, Nitrospiraceae, 0319-6A21, and wb1-A12. At the low tide sites, nitrogen fixation was the dominant function conducted by Bradyrhizobiaceae. The reduction of nitrate was carried out with the help of Xanthomonadales but relatively weak in all sampling sites especially for low tide sites. This was mostly because the richness and evenness of bacterial community were the lowest at the low tide sites. Meanwhile, the pH, Cl-, salinity, NH4+, NO3- and C/N ratio were the important factors that shaped the composition of local bacterial community. Further, the nonmetric multidimensional scaling results indicated that there were significant statistical differences in the composition of bacterial community among samples at different layers. The dominant nitrogen cycling processes in coastal sediments at different tide levels were revealed in this study, which offered an extended concept of nitrogen transformation along the groundwater discharge path in the intertidal transition zone. The distributions and compositions of bacterial communities and predicted functions provided a new insight for coastal environment and ecosystem management.
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Affiliation(s)
- Xiaoying Zhang
- Institute of Intelligent Simulation and Early Warning for Subsurface Environment, Jilin University, Changchun 130026, China; College of Construction Engineering, Jilin University, Changchun 130026, China
| | - Tianshan Lan
- Institute of Intelligent Simulation and Early Warning for Subsurface Environment, Jilin University, Changchun 130026, China.
| | - Hongchen Jiang
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China
| | - Kexin Ye
- Institute of Intelligent Simulation and Early Warning for Subsurface Environment, Jilin University, Changchun 130026, China
| | - Zhenxue Dai
- Institute of Intelligent Simulation and Early Warning for Subsurface Environment, Jilin University, Changchun 130026, China; College of Construction Engineering, Jilin University, Changchun 130026, China.
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Lan T, Wang F, Bao S, Miao J, Bai Y, Jia S, Cao Y. The human health risk assessment and countermeasures study of groundwater quality. Environ Geochem Health 2023; 45:3215-3228. [PMID: 36197532 DOI: 10.1007/s10653-022-01384-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/28/2022] [Indexed: 06/01/2023]
Abstract
Due to various geological, hydrogeological conditions and human activities, groundwater of different regions has distinct hydrochemical characteristics. The harmful chemical components of groundwater affect human health, and thus, the groundwater quality health risk assessment (GQHR) is important to local residents. It is vital to select GQHR factors combined with hydrochemical features, and to explore their formation, concentration characteristics and the prominent controlling role of influencing risk distribution from natural and human reasons. The factors of NO3-, NO2-, NH4+ and F- were extracted as assessment factors to evaluate the GQHR. The factors NO3-, NO2- and NH4+ are derived by human activities and F- stems from irrigation of geogenic high-fluoride groundwater and fertilizer use. The results of GQHR showed the risk order as children > adult females > adult males. The low- and medium-risk regions correspond to high groundwater levels, which are mainly controlled by natural factors. The high-risk regions located in eastern part of the study area, which were affected by both natural and human reasons. The targeted measures to prevent the increase of groundwater health risk caused by different dominant controlling effects were put forward. The research provides a scientific basis for the safety of groundwater supply and environmental exposure in this area. The research ideas and methods can be a reference for similar studies.
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Affiliation(s)
- Tianshan Lan
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Fugang Wang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130012, China.
| | - Shanshan Bao
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Jinjie Miao
- Tianjin Center, China Geological Survey, Tianjin, 300170, China
| | - Yaonan Bai
- Tianjin Center, China Geological Survey, Tianjin, 300170, China
| | - Sida Jia
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130012, China
| | - Yuqing Cao
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun, 130012, China
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Liu F, Liu XJ, He YP, Liu GB, Lan T, Ye JS. Clinical value of GRACE score combined with DFR in predicting short-term prognosis of patients undergoing early PCI after thrombolysis for acute myocardial infarction. Eur Rev Med Pharmacol Sci 2023; 27:4038-4045. [PMID: 37203827 DOI: 10.26355/eurrev_202305_32309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
OBJECTIVE The aim of the study was to investigate the clinical value of the Global Registry of Arterial Events in Acute Coronary Syndromes (GRACE) score combined with the D-dimer/fibrinogen ratio (DFR) in predicting the short-term prognosis of patients undergoing percutaneous coronary intervention (PCI) early after thrombolysis for acute myocardial infarction (AMI). PATIENTS AND METHODS A total of 102 patients who underwent PCI early after thrombolysis for AMI during April 2020 to January 2022 in our hospital were picked as study subjects. These subjects were assigned as the good prognosis group (without adverse cardiovascular events) and poor prognosis group (with adverse cardiovascular events) according to whether adverse cardiovascular events occurred during hospitalization and follow-up. Changes in GRACE scores and DFR levels in patients with different prognoses were analyzed. The GRACE score and DFR level of patients with different prognosis were analyzed. The clinic pathological characteristics were collected, and the risk factors for poor prognosis of AMI patients were analyzed by logistic risk regression; ROC curve was used to analyze the prognostic value of GRACE score combined with DFR in early PCI patients after AMI thrombolysis. RESULTS Compared with the good prognosis group, the GRACE score and DFR level in the poor prognosis group were much higher (p<0.001). Significant differences existed in blood pressure, ejection fraction, number of diseased branches, and Killip grading between the patients with good prognosis and those with poor prognosis (p<0.05). There existed no significant difference in clinical medication between the patients with good prognosis and those with poor prognosis (p>0.05). Logistic multivariate analysis indicated that GRACE score, DFR, ejection fraction, number of lesion branches, and Killip grade were all risk factors influencing the prognosis of patients undergoing early PCI after thrombolysis in AMI (p<0.05). The ROC curve was established and the area under the curve (AUC) of GRACE score, DFR, and combined detection were 0.815, 0.783, and 0.894, respectively, and the sensitivity and specificity were 80.24%, 60.42%, 83.71%, 66.78%, 91.42% and 77.83%, respectively. The AUC, sensitivity, and specificity of combined detection were higher than those of the two alone and had a higher predictive value for the short-term prognosis of patients. CONCLUSIONS The GRACE score combined with DFR was of great value in diagnosing the short-term prognosis of patients undergoing PCI early after thrombolysis for AMI. Furthermore, the GRACE score, DFR, ejection fraction, number of lesion branches, and Killip classification were all important factors influencing the short-term prognosis of patients, which were of great significance in determining the prognosis of patients.
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Affiliation(s)
- F Liu
- Department of Cardiology, Jintang County First People's Hospital, Chengdu, China.
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Affiliation(s)
- Y H Zhou
- Department of Pathology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610042, China
| | - S Qin
- Department of Pathology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610042, China
| | - J X Yan
- Department of Pathology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610042, China
| | - J Ji
- Department of Pathology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610042, China
| | - T Lan
- Department of Pathology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610042, China
| | - Y Liu
- Department of Pathology, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu 610042, China
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Li Q, Cai T, Zhang L, Liu N, Chen R, Xie Z, Huang J, Zhang X, He T, Cao H, Li Y, Lan T, Xie S, Peng Y, Li B, Wu J, Li J, Liang F, Fan S. 892P The genomic features of Chinese oropharyngeal squamous cell carcinomas and the implications for therapy. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Yu Y, Xu M, Duan XR, Nie L, Ke R, Yuan BD, Gong SB, Lan T, Wang ZH, Long T, Wu YF, Yuan JB, Wu T, Chen YH, Liu H, Zhou YX, Wang HJ, Zhong WL, Shi ZB, Li JQ, Liu Y, Hao GZ, Chen W, Chen Q, Sun AP, Ye MY. Recent Progress of Optical and Spectroscopic Diagnostics for Turbulence on the HL-2A tokamak. J Fusion Energ 2021. [DOI: 10.1007/s10894-021-00302-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ji JX, Liu AD, Zhou C, Zhuang G, Zhang J, Feng X, Liu ZY, Zhong XM, Fan HR, Zhang SB, Liu Y, Hu LQ, Mao WZ, Lan T, Xie JL, Li H, Liu ZX, Liu WD. The cross-polarization scattering system for the magnetic fluctuation measurement in the Experimental Advanced Superconducting Tokamak. Rev Sci Instrum 2021; 92:043511. [PMID: 34243396 DOI: 10.1063/5.0012520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 03/16/2021] [Indexed: 06/13/2023]
Abstract
The cross-polarization scattering (CPS) system for magnetic fluctuation measurements in the Experimental Advanced Superconducting Tokamak (EAST) has been designed and installed. Different from the Doppler reflectometer (DR) system, the CPS system detects the perpendicular polarization of the electromagnetic wave induced by magnetic fluctuations B̃. The CPS system in the EAST has been developed from the existing Doppler reflectometer system, and they are integrated together for simultaneous measurement of magnetic and density fluctuations. Ray-tracing simulations are used to calculate the scattering locations and the wavenumber coverage of the magnetic fluctuation for CPS. In the experiments, the CPS and DR system data were different in Doppler shift, amplitude, and spectrum broadening. In this article, the hardware design, the ray tracing, and the preliminary results of the system in the EAST are presented.
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Affiliation(s)
- J X Ji
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - A D Liu
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Zhou
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - G Zhuang
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J Zhang
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - X Feng
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Z Y Liu
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - X M Zhong
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - H R Fan
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - S B Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230021, China
| | - Y Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230021, China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230021, China
| | - W Z Mao
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - T Lan
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J L Xie
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - H Li
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Z X Liu
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - W D Liu
- School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
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Li Y, Wang ZC, Luo L, Mu CY, Xu J, Feng Q, Li SB, Gu B, Ma P, Lan T. The clinical value of the combined detection of sEGFR, CA125 and HE4 for epithelial ovarian cancer diagnosis. Eur Rev Med Pharmacol Sci 2021; 24:604-610. [PMID: 32016961 DOI: 10.26355/eurrev_202001_20036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study aims to investigate the clinical value of combined detection of serum soluble epidermal growth factor receptor (sEGFR), cancer antigen 125 (CA125), and human epididymis protein 4 (HE4) in the diagnosis of epithelial ovarian cancer (EOC). PATIENTS AND METHODS From December 2017 to October 2018, the serum samples were obtained from the Affiliated Hospital of Xuzhou Medical University, with 30 patients as EOC group, 30 patients with benign ovarian neoplasms as benign group, and 17 healthy subjects as healthy group. Besides, among 30 EOC patients, 9 serum samples were obtained from pre-operative and post-operative EOC patients. The levels of serum sEGFR were detected by enzyme-linked immunosorbent assay (ELISA), while CA125 and HE4 were detected by enhanced chemiluminescence immunoassay (ECLIA). The diagnostic value was evaluated by receiver operating characteristic (ROC) curve analysis. RESULTS The levels of serum sEGFR, CA125, and HE4 in EOC group were significantly higher than those in benign group (p<0.05) and healthy group (p<0.05). When using a single tumor marker, the CA125 shows the highest sensitivity (93.30%) and HE4 shows the highest specificity (97.87%). The specificity of combined detection of serum sEGFR, CA125, and HE4 was 100%, which was significantly higher than that using a single tumor marker. The area under the ROC curve (AUC) of combined detection of serum sEGFR, CA125, and HE4 (0.965) was much higher than that of the single detection and higher than that of combined detection of CA125 and HE4 (0.940). Moreover, the level of serum sEGFR in post-operative EOC group was significantly lower than that in the corresponding pre-operative EOC group (p<0.05). CONCLUSIONS Our study shows that combined detection of serum sEGFR, CA125, and HE4 increases the specificity and efficiency in EOC diagnosis, indicating that sEGFR could be a potential biomarker for the diagnosis and prognosis of EOC.
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Affiliation(s)
- Y Li
- School of Medical Technology, Xuzhou Medical University, Xuzhou City, Jiangsu Province,
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Wu Y, McKee G, Yu Y, Ke R, Yan Z, Jaehnig K, Xu M, Kriete M, Morton L, Qin X, Nie L, Wu T, Sun A, Lan T, Yuan B, Liu H, Gong S, Long T, Duan X, Ye M. Development of a 32-channel Beam Emission Spectroscopy diagnostic based on Neutral Beam Injection on HL-2A tokamak. Fusion Engineering and Design 2020. [DOI: 10.1016/j.fusengdes.2020.111734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sun Y, Cheng J, Luo Y, Yan XL, Wu ZX, He LL, Tan YR, Zhou ZH, Li QN, Zhou L, Wu RT, Lan T, Ma JY. Attenuation of a virulent swine acute diarrhea syndrome coronavirus strain via cell culture passage. Virology 2019; 538:61-70. [PMID: 31580972 PMCID: PMC7112038 DOI: 10.1016/j.virol.2019.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022]
Abstract
Swine acute diarrhea syndrome coronavirus (SADS-CoV) is a newly identified enteric alphacoronavirus that causes fatal diarrhea in newborn piglets in China. Here, we propagated a virulent strain SADS-CoV/CN/GDWT/2017 in Vero cells for up to 83 passages. Four strains of SADS-CoV/GDWT-P7, -P18, -P48 and -P83 were isolated and characterized. Sequence alignments showed that these four novel strains exhibited 16 nucleotide mutations and resultant 10 amino acid substitutions in open reading frame 1a/1b, spike, NS3a, envelope, membrane and nucleocapsid proteins. Furthermore, a 58-bp deletion in NS7a/7b was found in P48 and P83 strains, which led to the loss of NS7b and 38 amino acid changes of NS7a. Pig infection studies showed that the P7 strain caused typical watery diarrhea, while the P83 strain induced none-to-mild, delayed and transient diarrhea. This is the first report on cell adaption of a virulent SADS-CoV strain, which gives information on the potential virulence determinants of SADS-CoV.
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Affiliation(s)
- Y Sun
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - J Cheng
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Y Luo
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - X L Yan
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Z X Wu
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - L L He
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Y R Tan
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Z H Zhou
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Q N Li
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - L Zhou
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - R T Wu
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - T Lan
- College of Animal Science, South China Agricultural University, Guangzhou, China.
| | - J Y Ma
- College of Animal Science, South China Agricultural University, Guangzhou, China.
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Feng X, Liu AD, Zhou C, Wang MY, Zhang J, Liu ZY, Liu Y, Zhou TF, Zhang SB, Kong DF, Hu LQ, Ji JX, Fan HR, Li H, Lan T, Xie JL, Mao WZ, Liu ZX, Ding WX, Zhuang G, Liu WD. Five-channel tunable W-band Doppler backscattering system in the experimental advanced superconducting tokamak. Rev Sci Instrum 2019; 90:024704. [PMID: 30831725 DOI: 10.1063/1.5075615] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 01/18/2019] [Indexed: 06/09/2023]
Abstract
A 5-channel Doppler backscattering system has been designed and installed in the Experimental Advanced Superconducting Tokamak (EAST). Through an I/Q-type double sideband modulator and a frequency multiplier, an array of finely spaced (Δf = 400 MHz) frequencies that span 1.6 GHz has been created. The center of the array bandwidth is tunable within the range of 75-97.8 GHz, which covers most of the W band (75-110 GHz). The incident angle can be adjusted from -4° to 12°, and the wavenumber range is 4-15 cm-1 with a wavenumber resolution of Δk/k ≤ 0.35. Ray tracing is used to calculate the scattering location and the scattering wavenumber. This article details the hardware design, the ray tracing, and the preliminary experimental results from EAST plasmas.
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Affiliation(s)
- X Feng
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - A D Liu
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - C Zhou
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - M Y Wang
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - J Zhang
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - Z Y Liu
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - Y Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230031, China
| | - T F Zhou
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230031, China
| | - S B Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230031, China
| | - D F Kong
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230031, China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Anhui, Hefei 230031, China
| | - J X Ji
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - H R Fan
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - H Li
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - T Lan
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - J L Xie
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - W Z Mao
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - Z X Liu
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - W X Ding
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - G Zhuang
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - W D Liu
- KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
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Gong S, Yu Y, Xu M, Sun A, Lan T, Liu H, Zhong W, Shi Z, Wang H, Wu Y, Yuan B, Mao S, Ye M, Duan X. Development and preliminary results of phase contrast imaging diagnostic on HL-2A. Fusion Engineering and Design 2019. [DOI: 10.1016/j.fusengdes.2019.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Lan T. MIDDLE-AGED HEALTH RISK PROFILE AND OLD-AGED DISABILITY RISK. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Lan
- National Yang-Ming University
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14
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Wang MY, Zhou C, Liu AD, Zhang J, Liu ZY, Feng X, Ji JX, Li H, Lan T, Xie JL, Liu SQ, Ding WX, Mao WZ, Zhuang G, Liu WD. A novel, tunable, multimodal microwave system for microwave reflectometry system. Rev Sci Instrum 2018; 89:093501. [PMID: 30278705 DOI: 10.1063/1.5033968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
Based on a new technique, a tunable, multi-channel system that covers the Q-band (33-55 GHz) is presented in this article. It has a potential use of the Doppler backscattering system diagnostic that can measure the turbulence radial correlation and the perpendicular velocity of turbulence by changing the incident angle. The system consists primarily of a double-sideband (DSB) modulation and a multiplier, which creates four probing frequencies. The probing frequency enables the simultaneous analysis of the density fluctuations and flows at four distinct radial regions in tokamak plasma. The amplitude of the probing frequency can be adjusted by the initial phase of the intermediate frequency (IF) input from the double-sideband, and the typical flatness is less than 10 dB. The system was tested in the lab with a rotating grating, and the results show that the system can operate in the frequency range of 33-55 GHz with a Q-band multitude and that the power of each channel can be adjusted by the phase of the IF input of DSB.
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Affiliation(s)
- M Y Wang
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - C Zhou
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - A D Liu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - J Zhang
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - Z Y Liu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - X Feng
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - J X Ji
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - H Li
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - T Lan
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - J L Xie
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - S Q Liu
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - W X Ding
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - W Z Mao
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - G Zhuang
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
| | - W D Liu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui, Hefei 230026, China
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15
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Gong S, Yu Y, Xu M, Jiang W, Zhong W, Shi Z, Wang H, Wu Y, Yuan B, Lan T, Ye M, Duan X. The comparison between near-infrared and traditional CO2 phase contrast imaging on HL-2A tokamak. Fusion Engineering and Design 2018. [DOI: 10.1016/j.fusengdes.2018.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Yu Y, Wang HJ, Chen Z, Chen R, Lan T, Li YY, Zang Q, Zhang J, Zhao HL, Mao SF, Lyu B, Ye MY, Wan BN. Influence of neutral beam attenuation on beam emission spectroscopy and charge exchange recombination spectroscopy. Rev Sci Instrum 2018; 89:073503. [PMID: 30068091 DOI: 10.1063/1.5028205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 06/23/2018] [Indexed: 06/08/2023]
Abstract
Neutral beam attenuation is simulated by means of consulting the ADAS (Atomic Data and Analysis Structure) database based on experimentally diagnosed radial plasma density and electron temperature profiles on the Experimental Advanced Superconducting Tokamak (EAST). Two-dimensional distributions of beam emission and charge exchange recombination photon flux are simulated, taking neutral beam attenuation into account, together with comparison with experimental results of Beam Emission Spectroscopy (BES) and Charge eXchange Recombination Spectroscopy (CXRS). A photon number which is over 1014 promises a sufficient photon flux for typical detectors of BES, CXRS, and UltraFast-CXRS (UF-CXRS) diagnostics. Evidence shows that the ADAS database overvalues neutral beam injection effective stopping coefficient on the EAST tokamak. The joint diagnostic of BES and UF-CXRS which is under development to measure plasma pressure with a high temporal resolution of 1 μs will have strong signals in a radial range of 0.6 < ρ < 0.8. The steep gradients of plasma density and C6+ density at ρ ∼ 1 bring great difficulty to edge plasma investigation by this joint diagnostic.
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Affiliation(s)
- Y Yu
- School of Physics, University of Science and Technology of China, Hefei 230026, China
| | - H J Wang
- School of Physics, University of Science and Technology of China, Hefei 230026, China
| | - Z Chen
- School of Physics, University of Science and Technology of China, Hefei 230026, China
| | - R Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - T Lan
- School of Physics, University of Science and Technology of China, Hefei 230026, China
| | - Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Q Zang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - H L Zhao
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - S F Mao
- School of Physics, University of Science and Technology of China, Hefei 230026, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Y Ye
- School of Physics, University of Science and Technology of China, Hefei 230026, China
| | - B N Wan
- School of Physics, University of Science and Technology of China, Hefei 230026, China
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17
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Liu YS, Liu XB, Qiu YY, Lan T, Chen Y. Molecular mechanism of Wnt signal pathway in multiple myeloma cell line H929 cell autophagy. Eur Rev Med Pharmacol Sci 2018; 22:3327-3332. [PMID: 29917182 DOI: 10.26355/eurrev_201806_15152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Pathogenic mechanism of multiple myeloma is still unclear yet. Abnormality in cell autophagy is closely correlated with various orthopedic diseases especially multiple myeloma. Therefore, this study investigated the mechanism of cell autophagy abnormality in multiple myeloma occurrence and clinical implications. MATERIALS AND METHODS Using multiple myeloma cell line H929 as the model, cells were treated with UV irradiation. Western blot was used to measure the autophagy of H929 cell, expression level of autophagy molecules and activation of autophagy signal pathway such as Wnt. Using autophagy activator, H929 cell autophagy was potentiated, followed by quantification of autophagy molecular expression and signal pathway such as Wnt activation. Agonist or antagonist of Wnt signal pathway was used to treat H929 cells followed by measuring autophagy molecules and Wnt pathway activation. The correlation between Wnt signal pathway or cell autophagy and occurrence of multiple myeloma was analyzed. RESULTS UV irradiation treatment on multiple myeloma cell line H929 induced autophagy and Wnt signal pathway activation. The inhibitor of Wnt signal pathway suppressed UV-induced H929 cell autophagy. However, over-expression of Wnt signal pathway enhanced UV-mediated autophagy of H929 cells. The condition of Wnt activation and autophagy level were positively correlated. CONCLUSIONS UV irradiation can induce autophagy of multiple myeloma cells, suggesting that management of cell autophagy might be one possible treatment for multiple myeloma.
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Affiliation(s)
- Y-S Liu
- Guangdong Medical University, Zhanjiang, Guangdong, China.
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18
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Fan H, Li S, Lu M, Yin G, Yang X, Lan T, Dai L, Chen X, Li J, Zhang Y, Sirajuddin A, Kellman P, Arai AE, Zhao S. Myocardial late gadolinium enhancement: a head-to-head comparison of motion-corrected balanced steady-state free precession with segmented turbo fast low angle shot. Clin Radiol 2018; 73:593.e1-593.e9. [PMID: 29548551 DOI: 10.1016/j.crad.2018.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 02/08/2018] [Indexed: 02/08/2023]
Abstract
AIM To evaluate the image quality and diagnostic agreement with a head-to-head comparison of late gadolinium enhancement (LGE) images acquired by the motion-corrected (MOCO) balanced steady-state free precession (bSSFP) phase sensitivity inversion recovery (PSIR) and conventional segmented fast low angle shot (FLASH) PSIR methods15,16 in a patient cohort with a wide spectrum of cardiovascular disease. MATERIALS AND METHODS In 59 consecutive patients, signal-to-noise ratios (SNRs), contrast-to-noise ratios (CNRs) of the normal myocardium (NM), LGE, and blood pool (BP) were pair-wise compared between the two different sequences. A further semi-qualitative score system (graded 1 -4) was used to compare the overall image quality (OIQ). The diagnostic agreement of the two techniques were evaluated by both transmural severity and absolutely quantitative size of LGE. RESULTS The SNRs of the NM, LGE, and BP of MOCO bSSFP were 4.8±3.4, 53.6±35.6 and 43.2±29.3, compared with 3.9±3.6 (p=0.126), 27.7±18.5 (p<0.001) and 24.3±13.4 (p<0.001) of FLASH LGE, respectively. The CNRs of LGE to NM, LGE to BP, and BP to NM were 48.3±33.1 versus 23.8±16.7 (p<0.001), 6.5±21.6 versus 3.8±10.8 (p<0.001), and 38.3±27.2 versus 20.3±10.7 (p=0.448), respectively. The OIQ of MOCO bSSFP was higher than that of segmented FLASH (median 4 versus median 3, p<0.001). For quantification of LGE size, there is good agreement and high correlation (r=0.992, p<0.001) between the two methods. CONCLUSIONS MOCO bSSFP is a feasible, robust sequence for LGE imaging, especially for patients with arrhythmia and those incapable of breath-holding due to severe heart failure.
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Affiliation(s)
- H Fan
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Radiology, Air Force General Hospital, People's Liberation Army, Beijing, China
| | - S Li
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - M Lu
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; National Heart, Lung and Blood Institute (NHLBI), National Institutes of Health (NIH), Bethesda, MD, USA.
| | - G Yin
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - X Yang
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - T Lan
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - L Dai
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - X Chen
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - J Li
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y Zhang
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - A Sirajuddin
- National Heart, Lung and Blood Institute (NHLBI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - P Kellman
- Cardiovascular and Pulmonary Branch, National Heart, Lung and Blood Institute, National Institutes of Health, US Department of Health and Human Services, Bethesda, USA
| | - A E Arai
- National Heart, Lung and Blood Institute (NHLBI), National Institutes of Health (NIH), Bethesda, MD, USA
| | - S Zhao
- Department of Magnetic Resonance Imaging, Cardiovascular Imaging and Intervention Center, Fuwai Hospital, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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Chen GH, Mai KJ, Zhou L, Wu RT, Tang XY, Wu JL, He LL, Lan T, Xie QM, Sun Y, Ma JY. Detection and genome sequencing of porcine circovirus 3 in neonatal pigs with congenital tremors in South China. Transbound Emerg Dis 2017; 64:1650-1654. [DOI: 10.1111/tbed.12702] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Indexed: 11/28/2022]
Affiliation(s)
- G. H. Chen
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - K. J. Mai
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - L. Zhou
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - R. T. Wu
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - X. Y. Tang
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - J. L. Wu
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - L. L. He
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - T. Lan
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - Q. M. Xie
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - Y. Sun
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
| | - J. Y. Ma
- College of Animal Science; South China Agricultural University; Guangzhou China
- Key Laboratory of Animal Health Aquaculture and Environmental Control; Guangzhou Guangdong China
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20
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Chen H, Liu JZ, Hu GJ, Shi LL, Lan T. Promotion of proliferation and metastasis of hepatocellular carcinoma by LncRNA00673 based on the targeted-regulation of notch signaling pathway. Eur Rev Med Pharmacol Sci 2017; 21:3412-3420. [PMID: 28829500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate the relative expression of long non-coding RNA 00673 (lncRNA 00673) in hepatocellular carcinoma (HCC) and HCC cells and study its regulation on the malignant phenotype of HCC cells PATIENTS AND METHODS: Samples of HCC and adjacent tissues from January 2013 to December 2015 were collected. The expression level of lncRNA00673 in HCC tissues and cells was detected by quantitative Real-time polymerase chain reaction (qRT-PCR) assays. lncRNA00673 specific interference sequences were transiently transfected into HCC cells and the effect of HCC cells on the biological behavior of HCC cells was examined by in vitro experiments ((3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT assay), flow cytometry, transwell, etc.). A tumor model of nude mice with HCC was established for the study of tumor growth condition of tumor-bearing mice after the interference with lncRNA00673 expression. Changes in expression levels of molecular markers on Notch signaling pathway after the interference with lncRNA00673 were detected by Western blot. RESULTS lncRNA00673 was highly expressed in HCC tissues and cells. MTT results showed that interfering with lncRNA00673 inhibited cell proliferation. Flow cytometry results showed that HCC cell cycle was retarded in G1-G0 phase, thus promoting apoptosis after the interference with lncRNA00673. Western blot results showed that expression levels of molecular markers on Notch signaling pathway were changed after the interference with lncRNA00763. CONCLUSIONS lncRNA00673 is highly expressed in HCC tissues and cells, and can promote the proliferation and metastasis of HCC by the regulation on Notch signaling pathway. lncRNA00673 may be a potential target for the treatment of HCC.
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Affiliation(s)
- H Chen
- Department of Hepatobiliary and Pancreatic Surgery, The People's Hospital of Cangzhou, Cangzhou, Hebei Province, China.
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21
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Wang MY, Liu AD, Zhou C, Hu JQ, Li H, Lan T, Xie JL, Ding WX, Liu WD, Yu CX. A novel approach to estimating the Doppler shift frequency from quadrature mixer output. Rev Sci Instrum 2017; 88:073503. [PMID: 28764541 DOI: 10.1063/1.4991018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Doppler backscattering systems (DBSs) have been widely used in magnetic confinement fusion devices to measure the density fluctuations and propagation velocity of turbulence. However, the received signals of a DBS usually include both zero-order reflection and backscattering components, which results in interference in calculating the Doppler shift frequency from the backscattering components. A novel method is introduced here for estimating the Doppler shift frequency by separating the zero-order reflection and backscattering components using the cross-phase spectrum between the I-signal and Q-signal from a quadrature mixer, based on the difference in symmetrical characteristics between the zero-order reflection and backscattering signal spectra. It is proven that this method is more effective than traditional approaches, such as multiple signal classification and fast Fourier transformation, for extracting Doppler shift information.
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Affiliation(s)
- M Y Wang
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - A D Liu
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Zhou
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J Q Hu
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - H Li
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - T Lan
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J L Xie
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - W X Ding
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - W D Liu
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C X Yu
- CAS Key Laboratory of Geospace Environment, Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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22
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Lin P, Pan P, Lan T. MEDICAL OUTCOME AND UTILIZATION FOR HIP FRACTURE PATIENTS WITH OR WITHOUT OUTPATIENT REHABILITATION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- P. Lin
- Kuang Tien General Hospital, Taichung, Taiwan,
| | - P. Pan
- National Yang-Ming University Hospital, I-Lan, Taiwan,
| | - T. Lan
- National Yang-Ming University, Taipei, Taiwan
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23
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Hu JQ, Zhou C, Liu AD, Wang MY, Doyle EJ, Peebles WA, Wang G, Zhang XH, Zhang J, Feng X, Ji JX, Li H, Lan T, Xie JL, Ding WX, Liu WD, Yu CX. An eight-channel Doppler backscattering system in the experimental advanced superconducting tokamak. Rev Sci Instrum 2017; 88:073504. [PMID: 28764527 DOI: 10.1063/1.4991855] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Doppler backscattering system can measure the perpendicular velocity and fluctuation amplitude of the density turbulence with intermediate wavenumber. An eight-channel Doppler backscattering system has been installed in the Experimental Advanced Superconducting Tokamak (EAST), which can probe eight different radial locations simultaneously by launching eight fixed frequencies (55, 57.5, 60, 62.5, 67.5, 70, 72.5, 75 GHz) into plasma. The quasi-optical system consists of circular corrugated waveguide transmission, a fixed parabolic mirror, and a rotatable parabolic mirror which are integrated with quasi-optics front-end of the profile reflectometer inside the vacuum vessel. The incidence angle can be chosen from 5° to 12°, and the wavenumber range is 2-15/cm with the wavenumber resolution Δk/k≤0.21. Ray tracing simulations are used to calculate the scattering locations and the perpendicular wavenumber. The dynamic range of this new eight-channel Doppler backscattering system can be as large as 40 dB in the EAST. In this article, the hardware design, the ray tracing, and the preliminary experimental results in the EAST will be presented.
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Affiliation(s)
- J Q Hu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - C Zhou
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - A D Liu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - M Y Wang
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - E J Doyle
- Physics and Astronomy Department and PSTI, University of California, Los Angeles, California 90095, USA
| | - W A Peebles
- Physics and Astronomy Department and PSTI, University of California, Los Angeles, California 90095, USA
| | - G Wang
- Physics and Astronomy Department and PSTI, University of California, Los Angeles, California 90095, USA
| | - X H Zhang
- School of Computer and Information, Hefei University of Technology, Hefei, Anhui 230026, China
| | - J Zhang
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - X Feng
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - J X Ji
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - H Li
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - T Lan
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - J L Xie
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - W X Ding
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - W D Liu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
| | - C X Yu
- KTX Laboratory and Department of Modern Physics, University of Science and Technology of China, Anhui Hefei 230026, China
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Lan T, Naguib HE, Coolens C. Development of a permeable phantom for dynamic contrast enhanced (DCE) imaging quality assurance: material characterization and testing. Biomed Phys Eng Express 2017. [DOI: 10.1088/2057-1976/aa6486] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Zou Z, Liu H, Ding W, Brower D, Li W, Lan T, Zeng L, Yao Y, Yang Y, Jie Y. Opto-Mechanical systems design for polarimeter-interferometer on EAST. Fusion Engineering and Design 2016. [DOI: 10.1016/j.fusengdes.2016.09.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Liu HQ, Qian JP, Jie YX, Ding WX, Brower DL, Zou ZY, Li WM, Lian H, Wang SX, Yang Y, Zeng L, Lan T, Yao Y, Hu LQ, Zhang XD, Wan BN. Initial measurements of plasma current and electron density profiles using a polarimeter/interferometer (POINT) for long pulse operation in EAST (invited). Rev Sci Instrum 2016; 87:11D903. [PMID: 27910346 DOI: 10.1063/1.4963378] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A double-pass, radially viewing, far-infrared laser-based POlarimeter-INTerferometer (POINT) system utilizing the three-wave technique has been implemented for diagnosing the plasma current and electron density profiles in the Experimental Advanced Superconducting Tokamak (EAST). POINT has been operated routinely during the most recent experimental campaign and provides continuous 11 chord line-integrated Faraday effect and density measurement throughout the entire plasma discharge for all heating schemes and all plasma conditions (including ITER relevant scenario development). Reliability of both the polarimetric and interferometric measurements is demonstrated in 25 s plasmas with H-mode and 102 s long-pulse discharges. Current density, safety factor (q), and electron density profiles are reconstructed using equilibrium fitting code (EFIT) with POINT constraints for the plasma core.
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Affiliation(s)
- H Q Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - J P Qian
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y X Jie
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - W X Ding
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
| | - D L Brower
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
| | - Z Y Zou
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - W M Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - H Lian
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - S X Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y Yang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - L Zeng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - T Lan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y Yao
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - X D Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
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27
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Zou ZY, Liu HQ, Li WM, Lian H, Wang SX, Yao Y, Lan T, Zeng L, Jie YX. Optical configuration optimization and calibration for the POINT system on EAST. Rev Sci Instrum 2016; 87:11E121. [PMID: 27910327 DOI: 10.1063/1.4961272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Calibration of the polarimeter system is one of the key elements to determine the overall measurement accuracy. The anisotropic reflection and transmission properties of the mesh beam splitters can easily distort the polarization state of the circularly polarized beams. Using a rotating crystal quartz λ/2-waveplate to replace the plasma can effectively allow us to obtain the ratio of the measured Faraday rotation angle to the known rotation angle of the waveplate. This ratio is used to estimate the calibration factor for each chord to be accurately determined and help to minimize distortions introduced by the wire-mesh beam splitters. With the novel configuration optimization, the distortion of polarization state is effectively eliminated.
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Affiliation(s)
- Z Y Zou
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - H Q Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - W M Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - H Lian
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - S X Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y Yao
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - T Lan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - L Zeng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y X Jie
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
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Hu X, Lan T, Dai D, Xu RA, Yuan L, Zhou Q, Li Y, Cai J, Hu G. Evaluation of 24 CYP2D6 Variants on the Metabolism of Nebivolol In Vitro. Drug Metab Dispos 2016; 44:1828-1831. [DOI: 10.1124/dmd.116.071811] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 08/17/2016] [Indexed: 11/22/2022] Open
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Zhang XH, Liu AD, Zhou C, Hu JQ, Wang MY, Yu CX, Liu WD, Li H, Lan T, Xie JL. Influence of lithium coating on the optics of Doppler backscatter system. Rev Sci Instrum 2015; 86:103503. [PMID: 26520951 DOI: 10.1063/1.4932185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This paper presents the first investigation of the effect of lithium coating on the optics of Doppler backscattering. A liquid lithium limiter has been applied in the Experimental Advanced Superconducting Tokamak (EAST), and a Doppler backscattering has been installed in the EAST. A parabolic mirror and a flat mirror located in the vacuum vessel are polluted by lithium. An identical optical system of the Doppler backscattering is set up in laboratory. The power distributions of the emission beam after the two mirrors with and without lithium coating (cleaned before and after), are measured at three different distances under four incident frequencies. The results demonstrate that the influence of the lithium coating on the power distributions are very slight, and the Doppler backscattering can work normally under the dosage of lithium during the 2014 EAST campaign.
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Affiliation(s)
- X H Zhang
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - A D Liu
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Zhou
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J Q Hu
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - M Y Wang
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C X Yu
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - W D Liu
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - H Li
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - T Lan
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - J L Xie
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Chen J, Lan T, Zhang W, Dong L, Kang N, Zhang S, Fu M, Liu B, Liu K, Zhang C, Hou J, Zhan Q. Platelet-activating factor receptor-mediated PI3K/AKT activation contributes to the malignant development of esophageal squamous cell carcinoma. Oncogene 2015; 34:5114-27. [PMID: 25639872 DOI: 10.1038/onc.2014.434] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 10/16/2014] [Accepted: 11/08/2014] [Indexed: 12/22/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most common malignancies worldwide and occurs at a relatively high frequency in China, yet the mechanisms underlying its devastating outcome remain unclear. Here we report that platelet-activating factor receptor (PAFR), a type of G-protein-coupled receptor, was upregulated in ESCC tumors and cell lines, compared with controls; PAFR levels were positively correlated with ESCC clinical stages and survival time. Overexpression of PAFR promoted the malignant development of ESCC in vitro and in vivo, whereas depletion of PAFR suppressed these effects. Interestingly, PAFR was observed to activate PI3K/AKT (phosphatidylinositol 3-kinase/AKT) through the upregulation of FAK kinase activity. AKT-triggered nuclear factor-κB transcriptionally activated PAFR expression. This mutual positive regulation between PAFR and AKT was required for the aggressiveness of ESCC cells both in vitro and in vivo. Furthermore, treating mice bearing ESCC tumors with cholesterol-conjugated PAFR small interfering RNA effectively inhibited tumor progression and the expression of AKT-mediated oncogenic proteins. Taken together, we made the first demonstration that dysregulation of PAFR and the positive regulatory loop between PAFR and pAKT contribute to malignant progression of ESCC.
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Affiliation(s)
- J Chen
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - T Lan
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Department of Neurosurgery, Beijing Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - W Zhang
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - L Dong
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - N Kang
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - S Zhang
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - M Fu
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - B Liu
- Department of Pharmacology, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - K Liu
- National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Peking Union Medical College, Tsinghua University and Chinese Academy of Medical Sciences, Beijing, China
| | - C Zhang
- Institute of Basic Medical Sciences of Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - J Hou
- Institute of Basic Medical Sciences of Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Q Zhan
- State Key Laboratory of Molecular Oncology, Cancer Institute and Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Yang Y, Li GS, Liu HQ, Jie YX, Ding WX, Brower DL, Zhu X, Wang ZX, Zeng L, Zou ZY, Wei XC, Lan T. Design of vibration compensation interferometer for Experimental Advanced Superconducting Tokamak. Rev Sci Instrum 2014; 85:11D404. [PMID: 25430167 DOI: 10.1063/1.4886455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A vibration compensation interferometer (wavelength at 0.532 μm) has been designed and tested for Experimental Advanced Superconducting Tokamak (EAST). It is designed as a sub-system for EAST far-infrared (wavelength at 432.5 μm) poloarimeter/interferometer system. Two Acoustic Optical Modulators have been applied to produce the 1 MHz intermediate frequency. The path length drift of the system is lower than 2 wavelengths within 10 min test, showing the system stability. The system sensitivity has been tested by applying a periodic vibration source on one mirror in the system. The vibration is measured and the result matches the source period. The system is expected to be installed on EAST by the end of 2014.
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Affiliation(s)
- Y Yang
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - G S Li
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - H Q Liu
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - Y X Jie
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - W X Ding
- Department of Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095, USA
| | - D L Brower
- Department of Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095, USA
| | - X Zhu
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - Z X Wang
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - L Zeng
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - Z Y Zou
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - X C Wei
- Institute of Plasma Physics, Chinese Academy of Science, Hefei, Anhui 230031, People's Republic of China
| | - T Lan
- University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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Zou ZY, Liu HQ, Jie YX, Ding WX, Brower DL, Wang ZX, Shen JS, An ZH, Yang Y, Zeng L, Wei XC, Li GS, Zhu X, Lan T. Optical layout and mechanical structure of polarimeter-interferometer system for Experimental Advanced Superconducting Tokamak. Rev Sci Instrum 2014; 85:11D409. [PMID: 25430172 DOI: 10.1063/1.4890400] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A Far-InfaRed (FIR) three-wave POlarimeter-INTerferometer (POINT) system for measurement current density profile and electron density profile is under development for the EAST tokamak. The FIR beams are transmitted from the laser room to the optical tower adjacent to EAST via ∼20 m overmoded dielectric waveguide and then divided into 5 horizontal chords. The optical arrangement was designed using ZEMAX, which provides information on the beam spot size and energy distribution throughout the optical system. ZEMAX calculations used to optimize the optical layout design are combined with the mechanical design from CATIA, providing a 3D visualization of the entire POINT system.
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Affiliation(s)
- Z Y Zou
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - H Q Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y X Jie
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - W X Ding
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
| | - D L Brower
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
| | - Z X Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - J S Shen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Z H An
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y Yang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - L Zeng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - X C Wei
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - G S Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - X Zhu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - T Lan
- Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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Liu HQ, Jie YX, Ding WX, Brower DL, Zou ZY, Li WM, Wang ZX, Qian JP, Yang Y, Zeng L, Lan T, Wei XC, Li GS, Hu LQ, Wan BN. Faraday-effect polarimeter-interferometer system for current density measurement on EAST. Rev Sci Instrum 2014; 85:11D405. [PMID: 25430168 DOI: 10.1063/1.4889777] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A multichannel far-infrared laser-based POlarimeter-INTerferometer (POINT) system utilizing the three-wave technique is under development for current density and electron density profile measurements in the EAST tokamak. Novel molybdenum retro-reflectors are mounted in the inside wall for the double-pass optical arrangement. A Digital Phase Detector with 250 kHz bandwidth, which will provide real-time Faraday rotation angle and density phase shift output, have been developed for use on the POINT system. Initial calibration indicates the electron line-integrated density resolution is less than 5 × 10(16) m(-2) (∼2°), and the Faraday rotation angle rms phase noise is <0.1°.
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Affiliation(s)
- H Q Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y X Jie
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - W X Ding
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
| | - D L Brower
- Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095, USA
| | - Z Y Zou
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - W M Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Z X Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - J P Qian
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - Y Yang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - L Zeng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - T Lan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - X C Wei
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - G S Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, People's Republic of China
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Chamala S, Chanderbali AS, Der JP, Lan T, Walts B, Albert VA, dePamphilis CW, Leebens-Mack J, Rounsley S, Schuster SC, Wing RA, Xiao N, Moore R, Soltis PS, Soltis DE, Barbazuk WB. Assembly and Validation of the Genome of the Nonmodel Basal Angiosperm Amborella. Science 2013; 342:1516-7. [DOI: 10.1126/science.1241130] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Zhou C, Liu AD, Zhang XH, Hu JQ, Wang MY, Li H, Lan T, Xie JL, Sun X, Ding WX, Liu WD, Yu CX. Microwave Doppler reflectometer system in the Experimental Advanced Superconducting Tokamak. Rev Sci Instrum 2013; 84:103511. [PMID: 24182112 DOI: 10.1063/1.4825344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A Doppler reflectometer system has recently been installed in the Experimental Advanced Superconducting (EAST) Tokamak. It includes two separated systems, one for Q-band (33-50 GHz) and the other for V-band (50-75 GHz). The optical system consists of a flat mirror and a parabolic mirror which are optimized to improve the spectral resolution. A synthesizer is used as the source and a 20 MHz single band frequency modulator is used to get a differential frequency for heterodyne detection. Ray tracing simulations are used to calculate the scattering location and the perpendicular wave number. In EAST last experimental campaign, the Doppler shifted signals have been obtained and the radial profiles of the perpendicular propagation velocity during L-mode and H-mode are calculated.
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Affiliation(s)
- C Zhou
- Department of Modern Physics, CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei, Anhui 230026, China
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Cheng J, Dong JQ, Itoh K, Yan LW, Xu M, Zhao KJ, Hong WY, Huang ZH, Ji XQ, Zhong WL, Yu DL, Itoh SI, Nie L, Kong DF, Lan T, Liu AD, Zou XL, Yang QW, Ding XT, Duan XR, Liu Y. Dynamics of low-intermediate-high-confinement transitions in toroidal plasmas. Phys Rev Lett 2013; 110:265002. [PMID: 23848884 DOI: 10.1103/physrevlett.110.265002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Indexed: 06/02/2023]
Abstract
The dynamic features of the low-intermediate-high-(L-I-H) confinement transitions on HL-2A tokamak are presented. Here we report the discovery of two types of limit cycles (dubbed type-Y and type-J), which show opposite temporal ordering between the radial electric field and turbulence intensity. In type-Y, which appears first after an L-I transition, the turbulence grows first, followed by the localized electric field. In contrast, the electric field leads type-J. The turbulence-induced zonal flow and pressure-gradient-induced drift play essential roles in the two types of limit cycles, respectively. The condition of transition between types-Y and -J is studied in terms of the normalized radial electric field. An I-H transition is demonstrated to occur only from type-J.
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Affiliation(s)
- J Cheng
- Southwestern Institute of Physics, Chengdu 610041, People's Republic of China
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Wei HL, Pei JR, Jiang CX, Zhou LW, Lan T, Liu M, Wang T. Analysis of glutathione peroxidase 1 gene polymorphism and Keshan disease in Heilongjiang Province, China. Genet Mol Res 2011; 10:2996-3001. [PMID: 22180033 DOI: 10.4238/2011.december.2.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Keshan disease (KD) is an endemic cardiomyopathy associated with selenium deficiency. Recent studies indicate that glutathione peroxidase 1 (GPx1) mutation decreases GPx activity in myocardial cells and increases the risk of KD. To further clarify the correlation between GPx1 polymorphism and KD, we analyzed GPx1 polymorphism, blood selenium levels and GPx activity in KD patients and healthy controls in Heilongjiang Province. Four and 24 new mutation loci in the promoter and the exon region, respectively, of the GPx1 gene were found in the subjects, in contrast with the previously reported loci. There were no significant differences in the mutation frequency of these loci between the KD group and controls (chi-square test; P > 0.05). However, the mutation frequency of exon 474 was higher in the KD group (7/36) than in controls (2/41), and GPx activity was lower in the mutation group (90.475 ± 23.757 U/L) than in the non-mutation group (93.947 ± 17.463 U/L). Further investigation is necessary to clarify a possible causality between GPx1 exon 474 mutation and KD.
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Affiliation(s)
- H L Wei
- Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin, Heilongjiang, China
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Wang D, Precopio M, Reardon M, Lan T, Tang JX, Kandimalla ER, Bexon AS, La Monica N, Agrawal S. Supra-additive effect of IMO-4200, a novel TLR7 and TLR8 dual agonist, with rituximab and cytotoxics in preclinical models of hematologic malignancies. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e13076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Xie B, Chen J, Wang F, Lan T, Wang Y, Xia J, Li Z, Xie Q, Huang R, Qi Z. Monoclonal antibody treatment to prolong the secondary cardiac allograft survival in alloantigen-primed mice. Scand J Immunol 2010; 71:345-52. [PMID: 20500685 DOI: 10.1111/j.1365-3083.2010.02387.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have previously shown that costimulation blockade using a combination of monoclonal antibodies (mAbs) - CTLA4Ig, antibodies to CD154, LFA-1, and OX40L - can induce tolerance of cardiac allografts in mice with adoptively transferred CD4(+) memory T cells [1]. However, the effect of costimulatory blockade in secondary allograft rejection has not been studied. B6 mice that rejected BALB/c skin grafts for more than 4 weeks (defined as alloantigen-primed mice) were used as recipients. The recipient mice were treated with the mAbs to CD154, LFA-1, OX40L, and CD122 on days 0, 2, 4, and 6 after the secondary transplantation of BALB/c heart. The mean survival time (MST) of secondary cardiac allografts in rats treated with antibodies to CD154 and LFA-1 (2-antibodies approach) and those treated with antibodies to CD154, LFA-1, OX40L, and CD122 (4-antibodies approach) was greater than that of the controls (MST = 6.7 days, 22.2 days, and 3.2 days, respectively). The 4-antibodies approach prevented lymphocytic infiltration in the grafts, inhibited memory T-cells proliferation in the spleen, increased IL-10 secretion in the serum, and enhanced the expression of CD4(+) Foxp3(+) regulatory T cells (Tregs) in spleen. Expression levels of alloreactive antibodies were high in the recipient mice of experimental and control groups. Inhibiting the memory T cells by costimulation blockade extended allograft survival in secondary transplant models but could not induce tolerance of graft. Alloreactive antibodies may participate in alloresponse and play an important role in secondary cardiac allograft rejection.
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Affiliation(s)
- B Xie
- Organ Transplantation Institute of Xiamen University, Xiamen City, Fujian Province, PR China
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Lan T, Chen J, Xia J, Wang Y, Xie B, Wang F, Qi Z. Inhibition of Alloantigen-Primed Memory CD4+ and CD8+ T Cells by Hematopoietic Chimerism in Mice. Scand J Immunol 2010; 72:86-93. [DOI: 10.1111/j.1365-3083.2010.02412.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Liu AD, Lan T, Yu CX, Zhao HL, Yan LW, Hong WY, Dong JQ, Zhao KJ, Qian J, Cheng J, Duan XR, Liu Y. Characterizations of low-frequency zonal flow in the edge plasma of the HL-2A tokamak. Phys Rev Lett 2009; 103:095002. [PMID: 19792802 DOI: 10.1103/physrevlett.103.095002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2009] [Indexed: 05/28/2023]
Abstract
A low-frequency (<4 kHz), poloidally and toroidally symmetrical potential structure that peaks near zero frequency is observed in the edge plasma of the HL-2A tokamak. The axisymmetry structure exhibits a radial coherence length less than 1 cm. These characteristics are consistent with the theoretically predicted low-frequency zonal flows (LFZF). The radial wave-number frequency spectra of the LFZF show that the LFZF packets propagate both outwards and inwards. The geodesic acoustic mode (GAM) is found to coexist with the LFZF, and the LFZF is found to modulate the GAM and ambient turbulence with in-phase and antiphase relations, respectively, through an envelope analysis.
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Affiliation(s)
- A D Liu
- CAS Key Laboratory of Basic Plasma Physics, and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Lan T, Zhang S, Liu B, Li X, Chen R, Song W. Differentiating sex chromosomes of the dioecious Spinacia oleracea L. (spinach) by FISH of 45S rDNA. Cytogenet Genome Res 2006; 114:175-7. [PMID: 16825771 DOI: 10.1159/000093335] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2005] [Accepted: 11/29/2005] [Indexed: 11/19/2022] Open
Abstract
Spinacia oleracea L. (spinach) is a dioecious species with both male and female plants having 2n = 2x = 12 chromosomes, consisting of two large metacentrics, two long subtelocentrics, two short subtelocentrics, two acrocentrics, and four submetacentrics. The location of 45S rDNA was investigated on metaphase chromosomes using fluorescence in situ hybridization (FISH). The numbers of 45S rDNA foci in diploid sets of chromosomes from females was six and from males was five. All the fluorescent foci lay in secondary constrictions and the satellites. Our results indicate that an XY-type sex chromosome system could be present in spinach where the Y chromosome lacks a 45S RNA focus.
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Affiliation(s)
- T Lan
- Laboratory of Chromosome Research, College of Life Sciences, Nankai University, Tianjin, PR China
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Zhao KJ, Lan T, Dong JQ, Yan LW, Hong WY, Yu CX, Liu AD, Qian J, Cheng J, Yu DL, Yang QW, Ding XT, Liu Y, Pan CH. Toroidal symmetry of the geodesic acoustic mode zonal flow in a tokamak plasma. Phys Rev Lett 2006; 96:255004. [PMID: 16907314 DOI: 10.1103/physrevlett.96.255004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Revised: 04/28/2006] [Indexed: 05/11/2023]
Abstract
The toroidal symmetry of the geodesic acoustic mode (GAM) zonal flows is identified with toroidally distributed three step Langmuir probes at the edge of the HuanLiuqi-2A (commonly referred to as HL-2A) tokamak plasmas for the first time. High coherence of both the GAM and the ambient turbulence for the toroidally displaced measurements along a magnetic field line is observed, in contrast with the high coherence of the GAM but low coherence of the ambient turbulence when the toroidally displaced measurements are not along the same field line. The radial and poloidal features of the flows are also simultaneously determined. The nonlinear three wave coupling between the high frequency turbulent fluctuations and the flows is demonstrated to be a plausible formation mechanism of the flows.
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Affiliation(s)
- K J Zhao
- Southwestern Institute of Physics, P.O. Box 432, Chengdu, China
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Abstract
Two nucleoside derivatives containing the base analogues 3-deazaadenine and 3-methyl-2-pyridone have been prepared as analogues of dA and dT, respectively. After conversion into the appropriately protected phosphoramidites, DNA sequences were prepared with site-specifically placed analogues. When present in a duplex DNA sequence, the analogues result in the deletion of one or both of the hydrogen bonding functional groups (the N3-nitrogen of dA and the O2-carbonyl of dT) present in the minor groove. Binding by two ligands, 4',6-diamidine-2-phenyl indole (DAPI) and Hoechst 33258 in the minor groove has been probed using a variety of DNA sequences. These sequences contain a d(GAATTC)2 core with analogue nucleosides substituted for one or more of the dA and dT residues. DAPI bound strongly to any sequence that contained both O2-carbonyls of the central two dT residues. The presence of a dc3A residue did in some cases enhance binding. With one of the central O2-carbonyls deleted, the binding was noticeably reduced, and with both absent, no significant binding could be detected. Similar although less dramatic results were observed with Hoechst 33258 binding to analogue sequences.
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Affiliation(s)
- T Lan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02167, USA
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Wu SP, Tao S, Xu FL, Dawson R, Lan T, Li BG, Cao J. Polycyclic aromatic hydrocarbons in dustfall in Tianjin, China. Sci Total Environ 2005; 345:115-26. [PMID: 15919533 DOI: 10.1016/j.scitotenv.2004.11.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2004] [Accepted: 11/05/2004] [Indexed: 05/02/2023]
Abstract
Atmospheric dustfall samples from 23 locations in Tianjin, China, were collected and analyzed for 16 polycyclic aromatic hydrocarbons (PAHs) classified by the Environmental Protection Agency as priority pollutants from March 2002 to March 2003. SigmaPAH16 (sum of 16 PAH compounds) concentrations in the dustfall collected during heating season ranged from 2.5 to 85.5 mug/g, while that during the non-heating season varied from 1.0 to 48.2 microg/g dry weight. The dominant components in the heating season included naphthalene, phenanthrene, fluoranthene, and chrysene, while naphthalene, fluorene, phenanthrene, and fluoranthene were dominant during the non-heating season. Compared with the non-heating season, the heating season was characterized by a higher fraction of high-molecular-weight PAHs with four to six rings with exception of the samples from the east industrial area. The east industrial area had more significant correlations between individual PAH compounds, and more discrete triangular components of three-, four-, five- and six-ring PAHs. No significant correlations were observed between the PAHs concentrations and total organic carbon (TOC) in the dustfall samples. The deposition fluxes of sigmaPAH15 (sum of 15 PAHs except naphthalene), sigmaPAH6 (sum of 6 carcinogenic PAHs recommended by IARC) and benzo[a]pyrene (BaP) from atmospheric deposition to the whole area were estimated as 1911, 196, and 53 microg/m2/year, respectively. The deposition rates for PAH compounds in the east industrial area were higher than those in the urban and rural areas. Furthermore, the deposition contribution of PAHs during domestic heating season in winter was not significant relative to the annual inputs.
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Affiliation(s)
- S P Wu
- College of Environmental Sciences, Peking University, Beijing 100871, PR China
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Zhou Z, Xu J, Lan T. [Protective effect of berberine on isolated perfused heart in heart failure]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:417-8. [PMID: 12536581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To examine the protective action of berberine against the development of heart failure. METHODS Wister rats were divided into two groups. The Langendorff perfusion of isolated heart was performed and Verapamil was used to bring about acute heart failure. The experiment group was given berberine (10(-6) mol/L) before the use of Verapamil, but the control group was not given the berberine. A comparison was made on the degree of heart failure between the two group. RESULTS The degree of heart failure in the experiment group was significantly less severe than that in the control group (P < 0.001). CONCLUSION Berberine has the protective action against to the development of heart failure.
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Affiliation(s)
- Z Zhou
- Department of Physiology, School of Basic Medical Sciences, WCUMS, Chengdu 610041, China
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Lan T, McLaughlin LW. The energetic contribution of a bifurcated hydrogen bond to the binding of DAPI to dA-dT rich sequences of DNA. J Am Chem Soc 2001; 123:2064-5. [PMID: 11456833 DOI: 10.1021/ja003451s] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Two analogue bases are described: 3-deazaadenine is a derivative of adenine from which N3 has been deleted and 3-methyl-2-pyridone is a C-nucleoside that mimics thymine but lacks the O2 carbonyl. The dc(3)A-dm(3)2P base pair is similar to dA-dT but eliminates the polar functional groups in the minor groove. The presence of this base pair in dA-dT rich sequences results in destabilized duplexes or conformational preferences for monomolecular hairpins rather than bimolecular duplexes. When present in dG-dC rich sequences, no significant differences in helix stability are observed. These differences are explained on the basis of hydration effects, most notably, the elimination of the minor groove spine of hydration normally present in dA-dT rich sequences. CD spectra suggest that sequences with a fully modified core (four analogue base pairs) are more A-like helices than B-like helices. Sequences containing two analogue base pairs can be transformed to A-like helices under conditions of high salt, or 65% trifluoroethanol. These conformational changes are also explained in terms of a loss of hydration in the minor groove that normally stabilizes the B-form conformation. In the absence of such hydration, the helices are conformationally mobile and adopt a more A-like helix form.
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Affiliation(s)
- T Lan
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02167, USA
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