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Eikenella corrodens isolated from pleural effusion:A case report

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World Journal of Clinical Cases 2024年第18期12卷 3596-3602页

作者： Zi-Cong Liang Hao Ouyang Xue-Jing Song jian-Xin Liang Wei-Hua Zheng jian-jun chen Zheng-Gang Yin Sha-Yan chen Department of Laboratory Science Binhaiwan Central Hospital of DongguanDongguan 523905Guangdong ProvinceChina Key Laboratory of accurately etiological research on the pathogenesis of inflammation and cancer Dongguan 523905Guangdong ProvinceChina Central Laboratory Binhaiwan Central Hospital of DongguanDongguan 523905Guangdong ProvinceChina

BACKGROUND The bacterium Eikenella,classified as a gram-negative member of the phylum Proteobacteria,is distinguished by its rarity,corrosive nature,facultative anaerobic properties,and conditional *** represents the sole species within its genus-Eikenella corrodens(***)-and can be found colonizing both human and animal oral and nasopharyngeal ***,it occasionally inhabits the gastrointestinal or urogenital ***,its slow growth rate can be attributed to its high nutritional ***,there is an uneven distribution of construction and diagnostic capacity in China which poses undeniable challenges for the clinical examination and analysis of this case,especially in the basic *** SUMMARY Here we presented a case of empyema associated with *** infection in a 67-year-old male patient without any previous history of infectious diseases in our primary hospital in Dongguan district of *** patient was admitted due to recurrent worsening cough,sputum production,and dyspnea for 3 d,which had persisted for over 20 ***,the patient experienced a onehour episode of *** admission,immediate comprehensive examinations were conducted on the patient which subsequently led to his admission to the intensive care ***,the patient presented with drowsiness and profuse sweating along with bilateral conjunctival edema observed during initiation of non-invasive ventilation,suggesting empyema.A significant amount of coffee-colored malodorous pleural fluid was drained during the procedure above and sent to the laboratory department for ***,laboratory culture results confirmed the presence of *** infection in the pleural fluid *** patient received antimicrobial therapy until died on day 22 in the *** In this report,we presented a case of empyema associated with *** *** courses of morphological examination,vi

关键词： Eikenella corrodens Pleural fluid Morphology Viable culture Biochemical identification Case report

Extra-narrowband metallic filters with an ultrathin single-layer metallic grating

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Chinese Physics B 2020年第6期29卷 242-248页

作者： Ran Wang Qi-Huang Gong jian-jun chen State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Microelectronics Instruments and Equipments R&D Center Institude of Microelectronics of Chinese Academy of SciencesBeijing 100029China Nano-optoelectronics Frontier Center of Ministry of Education(NFC-MOE)&Collaborative Innovation Center of Quantum Matter Peking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

Narrowband and high-transmission optical filters are extensively used in color display technology, optical information processing, and high-sensitive sensing. Because of large ohmic losses in metallic nanostructures, metallic filters usually exhibit low transmittances and broad bandwidths. By employing both strong field enhancements in metallic nano-slits and the Wood’s anomaly in a periodic metallic grating, an extra-narrowband and high-transmission metallic filter is numerically predicted in an ultrathin single-layer metallic grating. Simulation results show that the Wood’s anomaly in the ultrathin(thickness H = 60 nm) single-layer metallic grating results in large field enhancements in the substrate and low losses in the metallic grating. As a result, the transmission bandwidth(transmittance T > 60%) at λ = 1200 nm is as small as △λFWHM=1.6 nm, which is smaller than 4% of that in the previous thin dielectric and metallic filters. The corresponding quality factor is as high as Q = λ/△λFWHM= 750, which is 40 times greater than that in the previous reports. Moreover, the thickness of our metallic filter(H = 60 nm) is smaller than 40% of that in the previous reports, and its maximum transmittance can reach up to 80%. In experiments, a narrowband metallic filter with a bandwidth of about △λFWHM = 10 nm, which is smaller than 25% of that in the previous metallic filters, is demonstrated.

关键词： metallic filter extra-narrowband field enhancement Wood’s anomaly

Analysis of single-event transient sensitivity in fully depleted silicon-on-insulator MOSFETs

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Nuclear Science and Techniques 2018年第4期29卷 108-113页

作者： Jing-Yan Xu Shu-Ming chen Rui-Qiang Song Zhen-Yu Wu jian-jun chen College of Computer National University of Defense Technology National Laboratory for Parallel and Distributed Processing National University of Defense Technology

Based on 3 D-TCAD simulations, single-event transient(SET) effects and charge collection mechanisms in fully depleted silicon-on-insulator(FDSOI) transistors are investigated. This work presents a comparison between28-nm technology and 0.2-lm technology to analyze the impact of strike location on SET sensitivity in FDSOI devices. Simulation results show that the most SET-sensitive region in FDSOI transistors is the drain region near the gate. An in-depth analysis shows that the bipolar amplification effect in FDSOI devices is dependent on the strike locations. In addition, when the drain contact is moved toward the drain direction, the most sensitive region drifts toward the drain and collects more charge. This provides theoretical guidance for SET hardening.

关键词： Single-event transient Charge collection Bipolar amplification Fully depleted silicon-on-insulator

Compatibility investigation of liquid tin and tungsten-based capillary porous system under high-density plasma environment

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Tungsten 2020年第1期2卷 94-100页

作者： Zong‑Biao Ye Xiao‑Chun Ma Ping‑Ni He Zhi‑jun Wang Chi Yang Bo chen jian‑jun chen jian‑jun Wei Kun Zhang Fu‑jun Gou Institute of Nuclear Science and Technology Sichuan UniversityChengdu 610064China Nuclear Power Institute of China Chengdu 610005China School of Physics Guizhou UniversityGuiyang 550025China Institute for Advanced Study Chengdu UniversityChengdu 610106China Institute of Atomic and Molecule Physics Sichuan UniversityChengdu 610064China

The bias voltage-enhanced plasma was utilized to investigate the compatibility of liquid tin and CPS(capillary porous system)in Sichuan University Plasma Surface Interaction(SCU-PSI).Prewetted(through static heating method)and unwetted(without preheating)Sn-CPS were prepared and then irradiated by different bias voltage-driven *** comparison to bare CPS exposed to plasma,the Sn wetted CPS showed slightly internal and external morphology variation after plasma irradiation with+20 V and−20 V bias ***,for unwetted Sn-CPS samples,the CPS revealed varying degrees of damage along with a range of bias voltage(0 V to−16 V),which has not been observed *** is interesting that there is no obvious surface structure change or damage for bare CPS after the irradiation of plasma and corrosion of liquid tin from other *** inside mechanism still needs further investigation.

关键词： Tungsten Liquid tin Capillary porous system Wetting Plasma Compatibility

Sarason’s Toeplitz Product Problem on the Fock–Sobolev Space

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Acta Mathematica Sinica,English Series 2018年第2期34卷 288-296页

作者： jian jun chen Xiao Feng WANG Jin XIA Guang Fu CAO School of Mathematics and Statistics Zhaoqing University Zhaoqing 526061 P. R. China School of Mathematics and Computational Science Sun Yat-sen University Guangzhou 510275 P. R. China School of Mathematics and Information Science and Key Laboratory of Mathematics andInterdisciplinary Sciences of the Guangdong Higher Education Institute Guangzhou University Guangzhou 510006 P. R. China College of Mathematics and Informatics South China Agricultural University Guangzhou 510642 P~ R. China

The Sarason＇s Toeplitz product problem asks when the Toeplitz product operator TuTv, with analytic symbols u and v, is bounded on Hilbert space of analytic functions. In this paper, we deal with this problem on the Fock-Sobolev space and have a complete solution that u = eq, v = Ce-q, where q is a linear complex polynomial and C is a nonzero constant.

关键词： Sarason's product Toeplitz operator Berezin transform Fock Sobolev space

Measuring fiber position errors from spectral data

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Research in Astronomy and Astrophysics 2015年第4期15卷 608-616页

作者： jian-jun chen Zhong-Rui Bai A-Li Luo Yong-Heng Zhao National Astronomical Observatories Chinese Academy of Sciences Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of Sciences University of Chinese Academy of Sciences

Precise fiber positioning is crucial to a wide field, multi-fiber spectroscopic survey such as the Guoshoujing Telescope （the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST）. are based on CCD photographic and Nowadays, most position error measurements image processing techniques. These methods only work for measuring errors orthogonal to the telescope optical axis, but there are also errors that lie parallel to the optical axis of the telescope, such as defocusing, and errors caused by the existing deviation angle between the optical axes of a fiber and the telescope. Directly measuring the two latter types of position errors is difficult for an individual fiber, especially during observations. Possible sources of fiber position errors are discussed in brief for LAMOST. By constructing a model of magnitude loss due to the fiber position error for a point source, we propose an indirect method to calculate both the total and systematic position errors for each individual fiber from spectral data. Restrictions and applications of this method are also discussed.

关键词： techniques: multi-fiber -- fiber spectroscopy -- spectrophotometry

Effect of mutant p27^(kip1) gene on human cholangiocarcinoma cell line, QBC_(939)

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World Journal of Gastroenterology 2008年第34期14卷 5344-5348页

作者： jian Luo Yong-jun chen Wei-Yu Wang Sheng-Quan Zou Department of General Surgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 Hubei Province China

AIM：To investigate the effects of exogenously mutated p27^kip1 （p27） on proliferation and apoptosis of human cholangiocarcinoma cell line, QBC939 in ***： Adenviral vectors were used to transfect mutated p27 cDNA into human QBC939 cell line. Expression of p27 was detected by RT-PCR. Western blot. Cell growth, morphological change, cell cycle, apoptosis and cloning formation were determined by MTT assay and flow ***： The expression of p27 protein and mRNA was increased signifi cantly in QBC939 cell line transfected with Ad-p27mt. The transfer of Ad-p27mt could signifi cantly inhibit the growth of QBC939 cells, decrease the cloning formation rate and induce apoptosis. p27 over expression caused cell cycle arrest at G0/G1 phase 72 h after infection with ***： p27 may cause cell cycle arrest at G0/G1 phase and subsequently lead to apoptosis. Recombinant adenovirus expressing mutant p27 may be potentially useful in gene therapy for cholangiocarcinoma.

关键词： Adenovirus Cholangiocarcinoma Gene therapy Cell cycle Apoptosis

Diffuse Interstellar Bandsλ6379,λ6614,andλ6660 in the LAMOST-MRS Spectra

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Research in Astronomy and Astrophysics 2022年第8期22卷 85-102页

作者： Ke-Fei Wu A-Li Luo jian-jun chen Wen Hou Yong-Heng Zhao CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China School of Information Management&Institute for Astronomical Science Dezhou UniversityDezhou 253023China

Diffuse interstellar bands(DIBs)have always been a mysterious existence in astronomical *** this work,we provide more DIB samples to slightly uncover this *** the LAMOST medium-resolution survey(MRS)spectra,we detected three DIBsλ6379,λ6614,andλ6660,obviously superimposed on the spectra of11,003 *** spectra cover spectral types from O to K,which can provide a large number of candidates for further research on *** sample shows a clear positive correlation between the strength of DIBs and extinction,which agrees with the result in the *** addition,there exist two peaks in each of the velocity distribution of these three DIBs,and the velocity differences between two peaks of each pair are *** reason for the two velocity components is due to the Galactic rotation.

关键词： ISM:molecules methods:data analysis (ISM:)dust extinction

First Total Synthesis of 7-O-Geranyl-pseudobaptigenin

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Chinese Chemical Letters 2001年第5期12卷 409-410页

作者： Ya Ping WANG Liang Xi LI jian jun chen Qing Lian WANG Yu Lin LI National Laboratory of Applied Organic Chemistry and Institute of Organic Chemistry Lanzhou UniversityLanzhou 730000

Total synthesis of 7-O-geranyl-pseudobaptigenin is described, the key steps are Grignard reaction and cyclization reaction.

关键词： Synthesis 7-O-geranyl-pseudobaptigenin pseudobaptigenin O-geranylated isoflavone.