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| 1 | Comparison of Clinical and Epidemiological Characteristics of Asymptomatic and Symptomatic SARS-CoV-2 Infection in Children显示文摘To understand the epidemiological and clinical features of the symptomatic and asymptomatic pediatric cases of COVID-19,we carried out a prospective study in Shanghai during the period of January 19 to April 30,2020.A total of 49 children(mean age 11.5±5.12 years)confirmed with SARS-CoV-2 infection were enrolled in the study,including 11(22.4%)domestic cases and 38(77.6%)imported cases.Nine(81.8%)local cases and 12(31.6%)imported cases had a definitive epidemiological exposure.Twenty-eight(57.1%)were symptomatic and 21(42.9%)were asymptomatic.Neither asymptomatic nor symptomatic cases progressed to severe diseases.The mean duration of viral shedding for SARS-CoV-2 in upper respiratory tract was 14.1±6.4 days in asymptomatic cases and 14.8±8.4 days in symptomatic cases(P>0.05).Forty-five(91.8%)cases had viral RNA detected in stool.The mean duration of viral shedding in stool was 28.1±13.3 days in asymptomatic cases and 30.8±18.6 days in symptomatic participants(P>0.05).Children<7 years shed viral RNA in stool for a longer duration than school-aged children(P<0.05).Forty-three(87.8%)cases had seropositivity for antibodies against SARS-CoV-2 within 1–3 weeks after confirmation with infection.In conclusion,asymptomatic SARS-CoV-2 infection may be common in children in the community during the COVID-19 pandemic wave.Asymptomatic cases shed viral RNA in a similar pattern as symptomatic cases do.It is of particular concern that asymptomatic individuals are potentially seed transmission of SARS-CoV-2 and pose a challenge to disease control. | Jiehao Cai Xiangshi Wang Jun Zhao Yanling Ge Jin Xu He Tian Hailing Chang Aimei Xia Jiali Wang Jinqiang Zhang Zhongqiu Wei Jingjing Li Chuning Wang Jianshe Wang Qirong Zhu Xiaowen Zhai Mei Zeng | 2020 | Virologica Sinica2020，35，6： | 4 |
| 2 | Erythromycin loaded by tetrahedral framework nucleic acids are more antimicrobial sensitive against Escherichia coli(E.coli)显示文摘Erythromycin is a commonly used broad-spectrum antibiotic,but resistance to this antibiotic makes its use less effective.Considerable efforts,beside finding alternatives,are needed to enhance its antimicrobial effect and stability against bacteria.Tetrahedral framework nucleic acids(tFNAs),a novel delivery vehicle with a three-dimensional nanostructure,have been studied as a carrying platform of antineoplastic drugs.In this study,the use of tFNAs in delivering erythromycin into Escherichia coli(E.coli)was investigated for the first time.The tFNAs vehicle increased the bacterial uptake of erythromycin and promoted membrane destabilization.Moreover,it increased the permeability of the bacterial cell wall,and reduced drug resistance by improving the movement of the drug across the membrane.The tFNAs-based delivery system enhanced the effects of erythromycin against E.coli.It may therefore provide an effective delivery vehicle for erythromycin in targeting antibiotic-resistant bacteria with thick cell wall. | Yue Sun Yuhao Liu Bowen Zhang Shirong Shi Tao Zhang Dan Zhao Taoran Tian Qirong Li Yunfeng Lin | 2021 | Bioactive Materials2021，6，8： | 4 |
| 3 | Dual-wavelength bidirectional pumped high-power Raman fiber laser显示文摘In this paper, we reported both the experimental demonstration and theoretical analysis of a Raman fiber laser based on a master oscillator–power amplifier configuration. The Raman fiber laser adopted the dual-wavelength bidirectional pumping configuration, utilizing 976 nm laser diodes and 1018 nm fiber lasers as the pump sources. A 60-m-long25/400 μm ytterbium-doped fiber was used to convert the power from 1070 to 1124 nm, realizing a maximum power output of 3.7 kW with a 3 dB spectral width of 6.8 nm. Moreover, we developed a multi-frequency model taking into consideration the Raman gain spectrum and amplified spontaneous emission. The calculated spectral broadening of both the forward and backward laser was in good agreement with the experimental results. Finally, a 1.5 kW, 1183 nm second-order Raman fiber laser was further experimentally demonstrated by the addition of a 70-m-long germaniumdoped passive fiber. | Zehui Wang Qirong Xiao Yusheng Huang Jiading Tian Dan Li Ping Yan Mali Gong | 2019 | High Power Laser Science and Engineering2019，7，1： | 4 |
| 4 | Isolation of Bacillus amyloliquefaciens S20 and its application in control of eggplant bacterial wilt显示文摘 | Da Chen Xin liu Chunyu Li Wei Tian Qirong Shen Biao Shen | 2014 | Journal of Environmental Management2014，，： | 1 |
| 5 | The Effect of Two-Photon Absorption and Optical Excitation Area on the Generation of THz Radiation 显示文摘 | QIRONG XING LIYING LANG ZHEN TIAN | 2006 | Optics Communications2006，267，2： | 1 |
| 6 | The effect of two-photo absorption and optical excitation area on the generation of THz radiation 显示文摘 | XING Qirong LANG Liying TIAN Zhen | 2006 | Optics Communications2006，267，2： | 1 |
| 7 | Quantitative Analysis of Kerr Nonlinearity and Kerr-Like Nonlinearity Induced via Terahertz Generation in ZnTe 显示文摘 | ZHEN TIAN CHANGLEI WANG QIRONG XING | 2008 | Applied Physics Letters2008，92，04： | 1 |
| 8 | Enhanced Zero-Order Transmission of Terahertz Radiation Pulses Through Very Deep Metallic Gratings with Subwavelength Slits 显示文摘 | QIRONG XING SHUXIN LI ZHEN TIAN | 2008 | Applied Physics Letters2008，89，04： | 1 |
| 9 | Transmission Properties of Metallic Grating with Subwavelength Slits in THz Frequency Region 显示文摘 | DONG LIANG QIRONG XING ZHEN TIAN | 2007 | Active and Passive Electronic Components2007，2007，63： | 1 |
| 10 | Assessment of the maturity and biological parameters of compost produced from dairy manure and rice chaff by excitation–emission matrix fluorescence spectroscopy显示文摘 | Wei Tian Lingzhi Li Fang Liu Zhenhua Zhang Guanghui Yu Qirong Shen Biao Shen | 2012 | Bioresource Technology2012，，： | 1 |
| 11 | On the initiation of fiber fuse damage in high-power ytterbium-doped fiber lasers显示文摘Fiber fuse effect can occur spontaneously and propagate along optical fibers to cause widespread damage;it threatens all applications involving optical fibers. This paper presents two results. First, it establishes that the initiation of fiber fuse(IFF) in silica fibers is caused by virtual-defect-induced absorption. Critical temperatures and critical optical powers for IFF are simulated for the first time using a 3D solid-state heat transfer model with heat source generated by the virtual-defect-induced absorption. In this method, formation energies of the virtual defects can be uniquely determined, which offers critical information on the chemical reasons for fiber fuse. Second, this paper offers a method to evaluate operating temperatures of fiber lasers. General analytical solutions of the operating temperatures along gain fibers are deduced. Results of 976-nm laser-diode-pumped and 1018-nm tandem-pumped ytterbium-doped fiber(YDF) amplifiers using 10/130-μm YDFs are calculated.Potential limits caused by fiber fuse are discussed. | JIADING TIAN ZEHUI WANG QIRONG XIAO DAN LI PING YAN MALI GONG | 2022 | Photonics Research2022，10，11： | 0 |
| 12 | Construction of mechanically robust superamphiphobic surfaces on fiber using large particles显示文摘Superamphiphobic surfaces have attracted the attention of researchers because of their broad application prospects.Currently,superamphiphobicity is primarily achieved by minimizing the solid-liquid contact area.Over the past few decades,researchers have primarily focused on using physical deposition methods to construct superamphiphobic surfaces using fine-sized nanoparticles(<100 nm).However,porous hollow SiO_(2)particles(PH-SiO_(2)),which aretypically large spheres,have a highly hierarchical structure and can provide lower solid-liquid contact fractions than those provided byfine-sized particles.In this study,we used PH-SiO_(2)as building blocks and combined them with poly(dimethylsiloxane)to construct a mechanically robust coating on fiber by spray-coating.After chemical vapordeposition treatment,the coating exhibited excellent superamphiphobicity and could repel various liquids,covering a wide rangeof surfacetensions(27.4-72.0mN-m^(-1)). | Chang LV Jinyi WANG Qirong TIAN Zhicheng ZHANG Tao WANG Rongfei LIU Sheng WANG | 2022 | Frontiers of Materials Science2022，16，4： | 0 |
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