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28篇 您的检索式:作者名="Junsheng YUAN"
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1Prognostic nutritional index is an independent prognostic factor for gastric cancer patients with peritoneal dissemination显示文摘Objective: The predictive and prognostic role of prognostic nutritional index(PNI) in gastric cancer patients with peritoneal dissemination remains unclear. This study aims to explore the role of the PNI in predicting outcomes of gastric cancer patients with peritoneal dissemination.Methods: A total of 660 patients diagnosed with gastric adenocarcinoma with peritoneal metastasis between January 2000 and April 2014 at Sun Yat-sen University Cancer Center and the Sixth Affiliated Hospital of Sun Yatsen University were retrospectively analyzed. The clinicopathologic characteristics and clinical outcomes of patients with peritoneal dissemination were analyzed.Results: Compared with PNI-high group, PNI-low group was correlated with advanced age(P=0.036), worse performance status(P<0.001), higher frequency of ascites(P<0.001) and higher frequency of multisite distant metastasis(P<0.001). Kaplan-Meier survival curves showed that PNI-high group had a significantly longer median overall survival than PNI-low group(13.13 vs. 9.03 months, P<0.001). Multivariate survival analysis revealed that Borrmann type IV(P=0.014), presence of ascites(P=0.017) and lower PNI(P=0.041) were independent poor prognostic factors, and palliative surgery(P<0.001) and first-line chemotherapy(P<0.001) were good prognostic factors. For patients receiving palliative surgery, the postoperative morbidity rates in the PNI-low group and PNIhigh group were 9.1% and 9.9%, respectively(P=0.797). The postoperative mortality rate was not significantly different between PNI-low and PNI-high groups(2.3% vs. 0.9%, P=0.362).Conclusions: PNI is a useful and practical tool for evaluating the nutritional status of gastric cancer patients with peritoneal dissemination, and is an independent prognostic factor for these patients.Runcong Nie Shuqiang Yuan Shi Chen Xiaojiang Chen Yongming Chen Baoyan Zhu Haibo Qiu Zhiwei Zhou Junsheng Peng Yingbo Chen 2016Chinese Journal of Cancer Research2016,28,6:19
2Impacts of climate change on ecosystem in Priority Areas of Biodiversity Conservation in China显示文摘Priority Areas of Biodiversity Conservation(PABCs) are the key areas for future biodiversity conservation in China. In this study, we used 5 dynamic global vegetation models(DGVMs) to simulate the ecosystem function changes under future climate change scenario in the 32 terrestrial PABCs. We selected vegetation coverage,vegetation productivity, and ecosystem carbon balance as the indicators to describe the ecosystem function changes.The results indicate that woody vegetation coverage will greatly increase in the Loess Plateau Region, the North China Plain, and the Lower Hilly Region of South China.The future climate change will have great impact on the original vegetation in alpine meadow and arid and semiarid regions. The vegetation productivity of most PABCs will enhance in the coming 100 years. The largest increment will take place in the southwestern regions with high elevation. The PABCs in the Desert Region of InnerMongolia-Xinjiang Plateau are with fastest productivity climbing, and these areas are also with more carbon sink accumulation in the future. DGVM will be a new efficient tool for evaluating ecosystem function changes in future in large scale. This study is expected to provide technical support for the future ecosystem management and biodiversity conservation under climate change.Xiaopu Wu Xin Lin Yuan Zhang Junjing Gao Li Guo Junsheng Li 2014Chinese Science Bulletin2014,59,34:4
3Red organic light emitting device with improved performance using a novel fluorescent dye codoped with phosphor-sensitizer显示文摘Efficient red organic light-emitting device consisted of a compound fluorescent-phosphor-sensitized emission layer was fabricated. A novel red fluorescent dye, 3-(dicyanomethylene)-5,5-dimethyl-1-(4-dimethylamino-styryl) cyclohexene (DCDDC), and a green phosphorescent dye, fac tris(2-phenylpyridine) iridium [Ir(ppy)3] were codoped into a host material 4,4'-N,N'-dicarbazolebiphe-nyl (CBP). By adjusting the component ratio of doping system, a series of devices with different concentration proportion of Ir(ppy)3:DCDDC were constructed. The results demonstrated that the device with 0.2 wt% DCDDC had a maximum power effi-ciency (ηp) of 2.12 lm/W at a current density of 0.1 mA/cm2, which was about 38% higher than that of conventional fluorescent device. When at a current density of 4 mA/cm2 (100 cd/m2) and 52 mA/cm2 (1000 cd/m2), the ηp percentage was about 160% and 143% higher than that of conventional device, respectively. A stable red light emission at a peak of 615 nm with Commissions Internationale de l'Eclairage coordinates near the region of (0.56, 0.42) in a wide bias range was also obtained. The improved performances were attributed to the efficient multiple-stage energy transfer from the host to the guest and the suppression of loss mechanism.WEN Wen YU JunSheng HU Yuan JIANG YaDong 2010Chinese Science Bulletin2010,55,24:3
4Template-free synthesis and characterization of K-phillipsite for use in potassium extraction from seawater显示文摘K-phillipsite was prepared using a hydrothermal method.Soluble glass and sodium aluminate were used as raw materials in the absence of an organic template,investigations regarding the K^+ ions were conducted at room temperature to determine the ion-exchange capacity in the seawater sample and the selectivity coefficient of the mixed K^+-Na^+solution.The sample was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersion spectroscopy(EDS).The K^+ ionexchange capacity is 51 mg/g in seawater and the selectivity coefficient is 75.1 in the mixed K^+-Na^+solution.The sample has a selectivity preference for K^+,and therefore can be used to selectively extract potassium from seawater.The sample composed of Si,Al,K,Na,and O exhibits a cross-like shape and is a typical K-phillipsite structure.Jin Hou Junsheng Yuan Jia Xu Yunpeng Fu Chunxia Meng 2013Particuology2013,11,6:3
5The effect of electrolyte additives on the rate performance of hard carbon anode at low temperature for lithium-ion capacitor显示文摘Lithium-ion capacitor(LIC),which combines the advantages of lithium-ion battery(LIB)and electrical double layer capacitor(EDLC),has a rapid development during last decade,however,the poor low temperature performance still limits its application.In this paper,three electrolyte additives including vinylene carbonate(VC),fluoroethylene carbonate(FEC)and 1,3,2-dioxathiolane 2,2-dioxide(DTD)have been utilized and their effects on the rate performance of hard carbon(HC)anode of LIC at various temperatures ranging from 25℃ to-40℃ have been well evaluated.The cell containing FEC shows the best rate performance at various temperatures and has the charge and discharge capability even at-40℃.For HC anode,the charge transfer impedance(R_(CT))increases exponentially at low temperature,while the equivalent series resistance(Rs)and the impedance of solid electrolyte interface(SEI)increase relatively few.At low temperatures,the effect of FEC may be mainly reflected in its effect on the charge transfer process.Jianmin Yuan Nan Qin Yanyan Lu Liming Jin Junsheng Zheng Jim P.Zheng 2022Chinese Chemical Letters2022,33,8:2
6Phase equilibrium of the ternary system of NH_(4)Cl—CaCl_(2)—H_(2)O at 50℃显示文摘The equilibrium data on the ternary system of NH_(4)Cl-CaCl_(2)-H_(2)O at 50℃were investigated using the wet-residue method.The experimental results show that there are three pure phase crystal areas of NH_(4)Cl,2NH_(4)Cl·CaCl_(2)·3H_(2)O and CaCl·2H_(2)O,two mixture phase crystal areas of NH_(4)Cl and 2NH_(4)Cl·CaCl·3H_(2)O,and 2NH_(4)Cl·CaCl_(2)·3H_(2)O and CaCl·2H_(2)O in the system.A new hydration double salt(2NH_(4)Cl·CaCl·3H_(2)O)was found in the ternary equilibrium system for the first time.Xia LI Junsheng YUAN Zhiyong JI Jianxin CHEN 2010Frontiers of Chemical Science and Engineering2010,4,1:2
7A different approach for seawater decalcification pretreatment using carbon dioxide asprecipitator显示文摘Yingying Zhao Junsheng Yuan Jijun Zhang 2013Desalination2013,322,:1
8Removal of ammonium from wastewater using calcium form clinoptilolite 显示文摘Ji Zhiyong Yuan Junsheng Li Xingang 2007Journal of Hazardous Materials2007,141,3:1
9Study on the structure of aqueous potassium chloride solutions using the X-ray diffraction and Raman spectroscopy methods显示文摘Fei Li Junsheng Yuan Dongchan Li Shenyu Li Zhen Han 2015Journal of Molecular Structure2015,,:1
10Synthesis of Mg/AI double-lay- ered hydroxides for boron removal 显示文摘Jie Liu Xiuli Guo Junsheng Yuan 2013Desalination and Water Treatment2013,,:1
11Seawater desalination program for comprehensive utilization of concentrated seawater显示文摘Cui Shujun Han Huiru Deng Huining Yuan Junsheng 0,,01:1
12Synthesis and characterization of zeolite W and its ion-exchange properties to K + in seawater显示文摘Jin Hou Junsheng Yuan Ru Shang 2012Powder Technology2012,,:1
13Synthesis of lithium ion-sieve with fractional steps 显示文摘JiZhiyong Yuan Junsheng Xie Yinghui 2010Advanced Materials Research2010,96,:1
14Removal of ammonium from wastewater using calcium form clinoptilolite显示文摘JI Zhiyong YUAN Junsheng LI Xingang 0,,03:1
15A Wideband E-Plane Crossover Coupler for Terahertz Applications显示文摘In this paper,a new approach to design terahertz(THz)E-plane crossover coupler is reported.By cascading two symmetrical septum polarizers,a simple structure with wide operating bandwidth and high isolation performance is achieved.The working principle is explained by operating waveguide modes.To simplify the optimization process,the scattering matrix(S-matrix)of the crossover is calculated.Two prototypes loaded and unloaded electromagnetic band gap(EBG)are fabricated and measured.The electrical contact problem at assembly plane is eliminated by the prototype loaded EBG.A measured bandwidth of 17.3%from 92.5 to 110 GHz for reflection and isolation coefficients<-15 dB and transmission coefficient>-2 dB is achieved.Xiaohe Cheng Zhiyan Liu Yuan Yao Junsheng Yu Xiaodong Chen 2021China Communications2021,18,5:1
16Transfer model and kinetic characteristics of $${\rm NH}_{4}^{+}$$ –K+ ion exchange on K-zeolite显示文摘Junsheng Yuan Qingmin Chen Jingkang Wang 2008Transport in Porous Media2008,,1:1
17Transfer model and kinetic characteristics of NH4^+-K^+ ion exchange on K-zeolite显示文摘Yuan Junsheng Chen Qingmin Wang Jingkang 2008Transport in Porous Media2008,72,1:1
18Phase-mediated cobalt phosphide with unique core-shell architecture serving as efficient and bifunctional electrocatalyst for hydrogen evolution and oxygen reduction reaction显示文摘Hydrogen evolution reaction(HER)and oxygen reduction reaction(ORR)have been considered as two critical processes in the field of electrocatalytic water-splitting for hydrogen production and fuel cells.However,the sluggish reaction kinetics of HER and ORR required efficient electrocatalyst such as Pt to promote such process.Transition metal phosphides(TMPs)exhibit great potential to replace noble metal electrocatalysts to accelerate HER and ORR due to their high activity and easy availability.Herein,a highly-efficient bifunctional CoP electrocatalyst for HER and ORR,featuring a unique core-shell structure decorated on nitrogen-doped carbon matrix was designed and constructed via etching a cobalt-based zeolitic imidazolate framework(ZIF-67)with phytic acid(PA)followed by pyrolysis treatment(PA-ZIF-67-900).Experimental results revealed that the pure-phase single-crystalline Co P exhibited outstanding electrocatalytic performance in HER and ORR,superior to Co(PO_(3))_(2) in PA-ZIF-67-700,hybrid phase of Co(PO_(3))_(2) and CoP in PA-ZIF-67-800 and Co_(2)P-doped CoP in PA-ZIF-67-1000.To reach the current density of 10 mA/cm^(2)the as-synthesized Co P required an overpotential of 120 m V for HER in 1 mol/L KOH and half-wave potential of 0.85 V in O_(2)-saturated 0.1 mol/L KOH.This work present new clue for construction of efficient and bifunctional electrocatalyst in the field of energy conversion and storage.Junsheng Chen Jianfeng Huang Hai Wang Weihang Feng Tianmi Luo Yuzhu Hu Chengke Yuan Liyun Cao Yanni Jie Koji Kajiyoshi Yongqiang Feng 2022Chinese Chemical Letters2022,33,8:0
19A lateral super-resolution imaging method using structured illumination without phase shift显示文摘Structured illumination microscopy has been a useful method for achieving lateral super-resolution,but it typically requires at least three precise phase shifts per orientation.In this paper,we propose a super-resolution method that utilizes structured illumination without phase shift.The reconstruction process requires only a conventionally illuminated image and an image with structured illumination.This method achieves the same effect as the traditional phase shift method,and more than doubles the resolution by synthesizing a few reconstructions at different illumination frequencies.We verify the resolution improvement process using a combination of theoretical derivations and diagrams,and demonstrate its effectiveness with numerical simulations.Yuan Jia Junsheng Lu Xinyu Chang Xiaodong Hu 2019Nanotechnology and Precision Engineering2019,2,3:0
20Facile synthesis of defect-rich Fe-N-C hybrid from fullerene/ferrotetraphenylporphyrin as efficient oxygen reduction electrocatalyst for Zn-air battery显示文摘Exploring remarkable oxygen reduction reaction(ORR)electrocatalysts for regenerative fuel cells and metal-air batteries is highly essential.Herein,a novel non-noble metal-based heterogeneous electrocatalyst with rich defects were successfully synthesized by liquid-liquid interfacial precipitation(LLIP)of fullerene(C_(60))and ferrotetraphenylporphyrin(FeTPP)followed by one step pyrolysis.The obtained product annealed at 700℃(C_(60)/FeTPP-700),when employed as ORR electrocatalyst,revealed a positive halfwave potential(E_(1/2))of 0.877 V vs.reversible hydrogen electrode(RHE),which was superior to that of the commercial 25%Pt/C.Delightfully,the assembled Zn-air battery(ZAB)using C_(60)/FeTPP-700 as an air-electrode catalyst exhibited a high power density of 153 m W/cm^(2),specific capacity of 668 mAh/g and long-term cycling stability for more than 250 h.Experimental results proved that the excellent electrocatalytic ORR activity of C_(60)/FeTPP-700 would attribute to the synergistic effect between FeN_xsites,Fe_(3)C/Fe nanoparticles and the structure defects.This work provides a feasible and simple method to prepare nonnoble metal-based ORR electrocatalysts for the application of energy storage and conversion.Hai Wang Liyun Cao Yongqiang Feng Junsheng Chen Weihang Feng Tianmi Luo Yuzhu Hu Chengke Yuan Yajuan Zhao Yong Zhao Koji Kajiyoshi Yijun Liu Zhenjiang Li Jianfeng Huang 2023Chinese Chemical Letters2023,34,5:0
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