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9篇 您的检索式:作者名="Shuangjun Li"
    题名 作者 年代 出处 被引量
1Poly (vinyl chloride)/ poly (alpha-methylstyrene-acrylonitrile)/acrylic resin ternary blends with enhanced toughness and heat resistance显示文摘Zhang Zhen Li Bo Chen Shuangjun 2012Polymers for Advanced Technologies2012,23,3:1
2Effect of carbon blacks with various structures on electrical properties of filled ethylene-propylene-diene rubber 显示文摘Li Zonghuan Zhang Jun Chen Shuangjun 2009Journal of Electrostatics2009,67,1:1
3Research Progress on Photocatalytic/Photoelectrocatalytic Oxidation of Nitrogen Oxides显示文摘The emission of nitrogen oxides(NO_(x))increases year by year,causing serious problems to our livelihoods.The photocatalytic oxidation of NO_(x)has attracted more attention recently because of its effi cient removal of NO_(x),especially for low concentra-tions of NO_(x).In this review,the mechanism of the photocatalytic oxidation of NO_(x)is described.Then,the recent progress on the development of photocatalysts is reviewed according to the categories of inorganic semiconductors,bismuth-based compounds,nitrogen carbide polymer,and metal organic frameworks(MOFs).In addition,the photoelectrocatalytic oxida-tion of NO_(x),a method involving the application of an external voltage on the photocatalytic system to further increase the removal effi ciency of NO_(x),and its progress are summarized.Finally,we outline the remaining challenges and provide our perspectives on the future directions for the photocatalytic oxidation of NO_(x).Shuangjun Li Linglong Chen Zhong Ma Guisheng Li Dieqing Zhang 2021Transactions of Tianjin University2021,27,4:0
4Enhancing tylosin production by combinatorial overexpression of efflux,SAM biosynthesis,and regulatory genes in hyperproducing Streptomyces xinghaiensis strain显示文摘Tylosin is a 16-membered macrolide antibiotic widely used in veterinary medicine to control infections caused by Gram-positive pathogens and mycoplasmas.To improve the fermentation titer of tylosin in the hyperproducing Streptomyces xinghaiensis strain TL01,we sequenced its whole genome and identified the biosynthetic gene cluster therein.Overexpression of the tylosin efflux gene tlrC,the cluster-situated S-adenosyl methionine(SAM)synthetase gene metK_(cs),the SAM biosynthetic genes adoK_(cs)-metFcs,or the pathway-specific activator gene tylR enhanced tylosin production by 18%,12%,11%,and 11%in the respective engineered strains TLPH08-2,TLPH09,TLPH10,and TLPH12.Co-overexpression of metK_(cs)and adoK_(cs)-metFcs as two transcripts increased tylosin production by 22%in the resultant strain TLPH11 compared to that in TL01.Furthermore,combinational overexpression of tlrC,metK_(cs),adoK_(cs)-metFcs,and tylR as four transcripts increased tylosin production by 23%(10.93g/L)in the resultant strain TLPH17 compared to that in TL01.However,a negligible additive effect was displayed upon combinational overexpression in TLPH17 as suggested by the limited increment of fermentation titer compared to that in TLPH08-2.Transcription analyses indicated that the expression of tlrC and three SAM biosynthetic genes in TLPH17 was considerably lower than that of TLPH08-2 and TLPH11.Based on this observation,the five genes were rearranged into one or two operons to coordinate their overexpression,yielding two engineered strains TLPH23 and TLPH24,and leading to further enhancement of tylosin production over TLPH17.In particular,the production of TLPH23 reached 11.35 g/L.These findings indicated that the combinatorial strategy is a promising approach for enhancing tylosin production in high-yielding industrial strains.Penghui Dai Yuyao Qin Luyuan Li Haidi Li Lihuo Lv Danying Xu Yuqing Song Tingting Huang Shuangjun Lin Zixin Deng Meifeng Tao 2023Synthetic and Systems Biotechnology2023,8,3:0
5Orthologous genesPm12andPm21from twowild relatives of wheat show evolutionary conservation but divergent powdery mildew resistance显示文摘Wheat powdery mildew,caused by Blumeria graminis f.sp.tritici(Bgt),is a devastating disease that threatens wheat production worldwide.Pm12,which originated from Aegilops speltoides,a wild relative of wheat,confers strong resistance to powdery mildew and therefore has potential use in wheat breeding.Using susceptible mutants induced by gamma irradiation,we physically mapped and isolated Pm12 and showed it to be orthologous to Pm21 from Dasypyrum villosum,also a wild relative of wheat.The resistance function of Pm12 was validated via ethyl methanesulfonatemutagenesis,virus-induced gene silencing,and stable genetic transformation.Evolutionary analysis indicates that the Pm12/Pm21 loci in wheat species are relatively conserved but dynamic.Here,we demonstrated that the two orthologous genes,Pm12 and Pm21,possess differential resistance against the same set of Bgt isolates.Overexpression of the coiledcoil domains of both PM12 and PM21 induces cell death in Nicotiana benthamiana leaves.However,their full-length forms display different cell death-inducing activities caused by their distinct intramolecular interactions.Cloning of Pm12 will facilitate its application in wheat breeding programs.This study also gives new insight into two orthologous resistance genes,Pm12 and Pm21,which show different race specificities and intramolecular interaction patterns.Shanying Zhu Cheng Liu Shuangjun Gong Zhaozhao Chen Rong Chen Tianlei Liu Renkang Liu Haonan Du Rui Guo Genying Li Miaomiao Li Renchun Fan Zhiyong Liu Qian-Hua Shen Anli Gao Pengtao Ma Huagang He 2023Plant Communications2023,4,2:0
6Highly selective and efficient photocatalytic NO removal:Charge carrier kinetics and interface molecular process显示文摘The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its characteristics of low concentration,wide range,large total amount,etc.Photocatalysis can utilize solar energy to purify NO pollutants under mild conditions,but its application is limited due to the low selectivity of nitrate and poor activity of NO removal.The underlying reason is that the interface mechanism of NO oxidation is not clearly understood,which leads to the inability to accurately regulate the NO oxidation process.Herein,the recent advances in the photocatalytic oxidation of NO are summarized.Firstly,the common strategies to effectively regulate carrier dynamics such as morphology control,facet engineering,defect engineering,plasma coupling,heterojunction and single-atom catalysts are discussed.Secondly,the progress of enhancing the adsorption and activation of reactants such as NO and O_(2) during NO oxidation is described in detail,and the corresponding NO oxidation mechanisms are enumerated.Finally,the challenges and prospects of photocatalytic NO oxidation are presented in term of nanotechnology for air pollution control.This review can shed light on the interface mechanism of NO oxidation and provide illuminating information on designing novel catalysts for efficient NOx control.Huan Shang Hongbao Jia Pengpeng Li Hao Li Wenbin Zhang Shuangjun Li Qing Wang Shuning Xiao Ding Wang Guisheng Li Dieqing Zhang 2024Nano Research2024,17,3:0
7Microwave assisted synthesis of PQ-GDY@NH_(2)-UIO-66(Zr) for improved photocatalytic removal of NOx under visible light显示文摘Pyrazinoquinoxaline-based graphdiyne (PQ-GDY) contains a fixed number of sp-sp2hybridized carbon atoms and pyrazine-like sp2hybridized N atoms.In this paper,NH_(2)-UIO-66(Zr) on PQ-GDY substrate was successfully constructed with the help of microwaveassisted heating.PQ-GDY surface acts as a microwave antenna under microwave irradiation to rapidly absorb microwave energy and form hot spots (hot spot effect),which facilitates the formation of well-dispersed NH2-UIO-66(Zr) with good crystallinity.Transient absorption spectra show that high hole transport property of PQ-GDY can accelerate the migration of photogenerated holes from NH2-UIO-66(Zr) to PQ-GDY and greatly reduce the recombination rate of photogenerated electrons and holes due to the strong interaction between PQ-GDY and NH2-UIO-66(Zr).Under visible light (λ≥420 nm),PQ-GDY@NH_(2)-UIO-66(Zr) shows high photocatalytic stability and high NO_(x)removal rate up to 74%,which is 44% higher than that of primitive NH_(2)-UIO-66(Zr).At the same time,it inhibits the formation of toxic byproducts (NO2) and limits its concentration to a low level.Qingyu Yang Shuangjun Li Rui Liang Lei Gao Shao Zhang Junfen Jia Yiran Liu Rundong Lyv Guisheng Li Shengxiong Xiao Dieqing Zhang 2023Journal of Environmental Sciences2023,,12:0
8Recurrent infection triggered encephalopathy syndrome in a pediatric patient with RANBP2 mutation and severe acute respiratory syndrome coronavirus 2 infection显示文摘Introduction:Acute necrotizing encephalopathy(ANE),a fatal subtype of infection-triggered encephalopathy syndrome(ITES),can be triggered by many systemic infections.RANBP2 gene mutations were associated with recurrent ANE.Case presentation:Here we report a 1-year-old girl with recurrent ITES and RANBP2 mutation.She was diagnosed with influenza-associated encephalopathy and made a full recovery on the first episode.After severe acute respiratory syndrome coronavirus 2 infection,the patient presented with seizures and deteriorating mental status.Brain magnetic resonance imaging revealed necrotic lesions in bilateral thalami and pons.Methylprednisolone,immunoglobulin,and interleukin 6 inhibitors were administered.Her consciousness level was improved at discharge.Nineteen cases of 2019 coronavirus disease-related ANE have been reported,of which 22.2%of patients died and 61.1%had neurologic disabilities.RANBP2 gene mutation was found in five patients,two of whom developed recurrent ITES.Conclusion:Patients with RANBP2 mutations are at risk for recurrent ITES,may develop ANE,and have a poor prognosis after relapse.Jiaqi Li Feng Huo Shuo Wang Yimu Fan Jie Wu Zhezhe Zhang Shuangjun Liu Quan Wang 2023Pediatric Investigation2023,7,4:0
9Visible Light-Induced Photocatalysis: Self-Fenton Degradation of p-ClPhOH Over Graphitic Carbon Nitride by a Polyethylenimine Bifunctional Catalyst显示文摘Deep degradation of organic pollutants by sunlight-induced coupled photocatalytic and Fenton (photo-Fenton) reactions is of immense importance for water purifi cation. In this work, we report a novel bifunctional catalyst (Fe-PEI-CN) by codoping graphitic carbon nitride (CN) with polyethyleneimine ethoxylated (PEI) and Fe species, which demonstrated high activity during p-chlorophenol (p-ClPhOH) degradation via H_(2)O_(2) from the photocatalytic process. The relationship between the catalytic effi ciency and the structure was explored using diff erent characterization methods. The Fe modifi cation of CN was achieved through Fe-N coordination, which ensured high dispersion of Fe species and strong stability against leaching during liquid- phase reactions. The Fe modifi cation initiated the Fenton reaction by activating H_(2)O_(2) into ·OH radicals for deep degradation of p-ClPhOH. In addition, it eff ectively promoted light absorption and photoelectron-hole (e-h ^(+) ) separation, corresponding to improved photocatalytic activity. On the other hand, PEI could signifi cantly improve the ability of CN to generate H_(2)O_(2) through visible light photocatalysis. The maximum H_(2)O_(2) yield reached up to 102.6 μmol/L, which was 22 times higher than that of primitive CN. The cooperation of photocatalysis and the self-Fenton reaction has led to high-activity mineralizing organic pollutants with strong durability, indicating good potential for practical application in wastewater treatment.Yuan Bai Shuangjun Li Bolin Yin Jinpeng Zhao Hexing Li 2024Transactions of Tianjin University2024,30,2:0
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