Pure Zn coatings easily lose their protective performance after biofouling because they have no antibacterial effect under visible light.In this study,we fabricate a new antibacterial Zn composite coating using electr...Pure Zn coatings easily lose their protective performance after biofouling because they have no antibacterial effect under visible light.In this study,we fabricate a new antibacterial Zn composite coating using electrodeposition to couple Fe3+-doped alkalized g-C_(3)N_(4)(AKCN-Fe)into an existing Zn coating and show that the AKCN-Fe enhances antibacterial property of the Zn coating under visible light.We attribute this enhancement to the high photocatalytic performance,high loading content,and good dispersion of AKCN-Fe.In addition,the photocatalytic antibacterial mechanism of the composite coating is supported by scavenger experiments and electron paramagnetic resonance(EPR)measurements,suggesting that superoxide(·O_(2)^(-))and hydroxyl radical(·OH)play main and secondary roles,respectively.展开更多
目的比较同期腹腔镜和同期开腹手术治疗结直肠癌伴同时性肝转移(sCRLM)的短期临床结果,初步探讨同期微创手术的可行性、安全性。方法回顾性收集2011年1月至2018年12月于温州医科大学附属第一医院接受同期手术切除原发灶和肝转移灶的sCRL...目的比较同期腹腔镜和同期开腹手术治疗结直肠癌伴同时性肝转移(sCRLM)的短期临床结果,初步探讨同期微创手术的可行性、安全性。方法回顾性收集2011年1月至2018年12月于温州医科大学附属第一医院接受同期手术切除原发灶和肝转移灶的sCRLM患者临床资料,分为腔镜组(23例)和开腹组(22例),比较两组围手术期指标。结果与开腹组相比,腹腔镜组手术时间明显延长(296 min vs175 min,P=0.01),而术中出血量(267 mL vs 283 mL,P=0.398)、术后肛门排气时间(4.1 d vs 4.8 d,P=0.204)、进食流质食物时间(5.3 d vs 5.5 d,P=0.599)、术后并发症发生率(60.9%vs 59.1%,P=0.9)以及腹腔引流管留置时间(12.3 d vs 12.5 d,P=0.834)均无统计学差异;术后住院时间(16.7 d vs 20.4 d,P=0.366)有缩短趋势。结论 sCRLM患者行同期腹腔镜手术安全、可行,可在筛选后的患者中应用。展开更多
Considerable progress has been made in organic light-emitting diodes(OLEDs)to achieve high external quantum efficiency,among which dipole orientation has a remarkable effect.In most cases,the radiation of the dipoles ...Considerable progress has been made in organic light-emitting diodes(OLEDs)to achieve high external quantum efficiency,among which dipole orientation has a remarkable effect.In most cases,the radiation of the dipoles in OLEDs is theoretically predicted with only one orientation parameter to match with corresponding experiments.Here,we develop a new theory with three orientation parameters to fully describe the relationship between dipole orientation and power density.Furthermore,we design an optimal test structure for measuring all three orientation parameters.All three orientation parameters could be retrieved from non-polarized spectra.Our theory provides a universal plot of dipole orientations in OLEDs,paving the way for designing more complicated OLED devices.展开更多
Microbiologically influenced corrosion caused by sulfate-reducing bacteria(SRB) poses a serious threat to marine engineering facilities.This study focused on the interaction between the corrosion behavior of two alumi...Microbiologically influenced corrosion caused by sulfate-reducing bacteria(SRB) poses a serious threat to marine engineering facilities.This study focused on the interaction between the corrosion behavior of two aluminum alloys and SRB metabolic activity.SRB growth curve and sulfate variation with and with aluminum were performed to find the effect of two aluminum alloys on SRB metabolic activity.Corrosion of 5052 aluminum alloy and Al-Zn-In-Cd aluminum alloy with and without SRB were performed.The results showed that both the presence of 5052 and Al-Zn-In-Cd aluminum alloy promoted SRB metabolic activity,with the Al-Zn-In-Cd aluminum alloy having a smaller promotion effect compared with 5052 aluminum alloy.The electrochemical results suggested that the corrosion of the Al-Zn-In-Cd aluminum alloy was accelerated substantially by SRB.Moreover,SRB led to the transformation of Al-Zn-In-Cd aluminum alloy corrosion product from Al(OH)3 to Al2 S3 and NaAlO2.展开更多
The fall armyworm(FAW),Spodoptera frugiperda,is a major pest native to the Americas that has recently invaded the Old World.Point mutations in the target-site proteins acetylcholinesterase-1(ace-1),voltage-gated sodiu...The fall armyworm(FAW),Spodoptera frugiperda,is a major pest native to the Americas that has recently invaded the Old World.Point mutations in the target-site proteins acetylcholinesterase-1(ace-1),voltage-gated sodium channel(VGSC)and ryanodine receptor(RyR)have been identified in S.frugiperda as major resistance mechanisms to organophosphate,pyrethroid and diamide insecticides respectively.Mutations in the adenosine triphosphate-binding cassette transporter C2 gene(ABCC2)have also been identified to confer resistance to Cry IF protein.In this study,we applied a whole-genome sequencing(WGS)approach to identify point mutations in the target-site genes in 150 FAW individuals collected from China,Malawi,Uganda and Brazil.This approach revealed three amino acid substitutions(A201S,G227A and F290V)of S.frugiperda ace-1,which are known to be associated with organophosphate resistance.The Brazilian population had all three ace-1 point mutations and the 227A allele(mean frequency=0.54)was the most common.Populations from China,Malawi and Uganda harbored two of the three ace-1 point mutations(A201S and F290V)with the 290V allele(0.47-0.58)as the dominant allele.Point mutations in VGSC(T929I,L932F and L1014F)and RyR(I4790M and G4946E)were not detected in any of the 150 individuals.A novel 12-bp insertion mutation in exon 15 of the ABCC2 gene was identified in some of the Brazilian individuals but absent in the invasive populations.Our results not only demonstrate robustness of the WGS-based genomic approach for detection of resistance mutations,but also provide insights for improvement of resistance management tactics in S.frugiperda.展开更多
Biofilm plays an important role on microbial corrosion and biofouling in marine environments.Inhibiting biofilm formation on construction surfaces is of great importance.Photocatalytic material with visiblelight respo...Biofilm plays an important role on microbial corrosion and biofouling in marine environments.Inhibiting biofilm formation on construction surfaces is of great importance.Photocatalytic material with visiblelight response,especially BiVO_(4),is regarded as a promising material for biofilm inhibition due to its green biocidal effect and high antibacterial efficiency.Approaches which can immobilize the photocatalytic particles onto metal surfaces with high mechanical strength are requisite.In this study,zinc matrixes were served as carriers for BiVO_(4)particles.The BiVO_(4)-inserted zinc matrixes were successfully obtained by ultrasound assisted electrodeposition.The insertion content of BiVO_(4)showed positive correlation with ultrasound power.Highly enhanced biofilm inhibition properties were obtained by BiVO_(4)inserted zinc·matrixes with an over 95%decreased bacterial coverage.It was proved that O2-(chief)andOH(subordinate)radicals were responsible for the high biocidal performance.Possible antibacterial mechanism was proposed,indicating that the photoinduced holes would both attack zinc crystals to generate active electrons to form O2-radicals,and react with H2 O to generate·OH,finally.Furthermore,corrosion resistance of the matrixes was proved to be stable due to the insertion of BiVO_(4).This study provides a potential application for photocatalyst in marine antifouling and anti-biocorrosion aspects.展开更多
The thin-film optical inverse problem has attracted a great deal of attention in science and industry,and is widely applied to optical coatings.However,as the number of layers increases,the time it takes to extract th...The thin-film optical inverse problem has attracted a great deal of attention in science and industry,and is widely applied to optical coatings.However,as the number of layers increases,the time it takes to extract the parameters of thin films drastically increases.Here,we introduce the idea of exploiting the structural similarity of all-optical neural networks and applied it to the optical inverse problem.We propose thin-film neural networks(TFNNs)to efficiently adjust all the parameters of multilayer thin films.To test the performance of TFNNs,we implemented a TFNN algorithm,and a reflectometer at normal incidence was built.Operating on multilayer thin films with 232 layers,it is shown that TFNNs can reduce the time consumed by parameter extraction,which barely increased with the number of layers compared with the conventional method.TFNNs were also used to design multilayer thin films to mimic the optical response of three types of cone cells in the human retina.The light passing through these multilayer thin films was then recorded as a colored photo.展开更多
基金financially supported by the National Natural Science Foundation of China(No.41706080)the Basic Frontier Science Research Program of the Chinese Academy of Sciences(No.ZDBS-LYDQC025)+1 种基金the Strategic Leading Science and Technology Program of the Chinese Academy of Sciences(No.XDA13040403)the Shandong Key Laboratory of Corrosion Science。
文摘Pure Zn coatings easily lose their protective performance after biofouling because they have no antibacterial effect under visible light.In this study,we fabricate a new antibacterial Zn composite coating using electrodeposition to couple Fe3+-doped alkalized g-C_(3)N_(4)(AKCN-Fe)into an existing Zn coating and show that the AKCN-Fe enhances antibacterial property of the Zn coating under visible light.We attribute this enhancement to the high photocatalytic performance,high loading content,and good dispersion of AKCN-Fe.In addition,the photocatalytic antibacterial mechanism of the composite coating is supported by scavenger experiments and electron paramagnetic resonance(EPR)measurements,suggesting that superoxide(·O_(2)^(-))and hydroxyl radical(·OH)play main and secondary roles,respectively.
文摘目的比较同期腹腔镜和同期开腹手术治疗结直肠癌伴同时性肝转移(sCRLM)的短期临床结果,初步探讨同期微创手术的可行性、安全性。方法回顾性收集2011年1月至2018年12月于温州医科大学附属第一医院接受同期手术切除原发灶和肝转移灶的sCRLM患者临床资料,分为腔镜组(23例)和开腹组(22例),比较两组围手术期指标。结果与开腹组相比,腹腔镜组手术时间明显延长(296 min vs175 min,P=0.01),而术中出血量(267 mL vs 283 mL,P=0.398)、术后肛门排气时间(4.1 d vs 4.8 d,P=0.204)、进食流质食物时间(5.3 d vs 5.5 d,P=0.599)、术后并发症发生率(60.9%vs 59.1%,P=0.9)以及腹腔引流管留置时间(12.3 d vs 12.5 d,P=0.834)均无统计学差异;术后住院时间(16.7 d vs 20.4 d,P=0.366)有缩短趋势。结论 sCRLM患者行同期腹腔镜手术安全、可行,可在筛选后的患者中应用。
基金supported by the China National Key Basic Research Program(No.2018YFA0306201)the National Natural Science Foundation of China(Nos.11774063,11727811,and 91963212)supported by the Science and Technology Commission of Shanghai Municipality(Nos.19XD143600,2019SHZDZX01,19DZ2253000,20501110500,and 21DZ1101500)。
文摘Considerable progress has been made in organic light-emitting diodes(OLEDs)to achieve high external quantum efficiency,among which dipole orientation has a remarkable effect.In most cases,the radiation of the dipoles in OLEDs is theoretically predicted with only one orientation parameter to match with corresponding experiments.Here,we develop a new theory with three orientation parameters to fully describe the relationship between dipole orientation and power density.Furthermore,we design an optimal test structure for measuring all three orientation parameters.All three orientation parameters could be retrieved from non-polarized spectra.Our theory provides a universal plot of dipole orientations in OLEDs,paving the way for designing more complicated OLED devices.
基金supported financially by the National Natural Science Foundation of China(No.41806090)the Key Research and Development Plan of Shandong Province(No.2018GHY115003)+1 种基金the National Natural Science Foundation of China(No.41576080)the China Postdoctoral Science Foundation(No.2018M642707).
文摘Microbiologically influenced corrosion caused by sulfate-reducing bacteria(SRB) poses a serious threat to marine engineering facilities.This study focused on the interaction between the corrosion behavior of two aluminum alloys and SRB metabolic activity.SRB growth curve and sulfate variation with and with aluminum were performed to find the effect of two aluminum alloys on SRB metabolic activity.Corrosion of 5052 aluminum alloy and Al-Zn-In-Cd aluminum alloy with and without SRB were performed.The results showed that both the presence of 5052 and Al-Zn-In-Cd aluminum alloy promoted SRB metabolic activity,with the Al-Zn-In-Cd aluminum alloy having a smaller promotion effect compared with 5052 aluminum alloy.The electrochemical results suggested that the corrosion of the Al-Zn-In-Cd aluminum alloy was accelerated substantially by SRB.Moreover,SRB led to the transformation of Al-Zn-In-Cd aluminum alloy corrosion product from Al(OH)3 to Al2 S3 and NaAlO2.
基金National Key Research Development Program of China(No.2019YFD0300103 to YW)the Fundamental Research Funds for the Central Universities of China(KYZ201920 to YW).
文摘The fall armyworm(FAW),Spodoptera frugiperda,is a major pest native to the Americas that has recently invaded the Old World.Point mutations in the target-site proteins acetylcholinesterase-1(ace-1),voltage-gated sodium channel(VGSC)and ryanodine receptor(RyR)have been identified in S.frugiperda as major resistance mechanisms to organophosphate,pyrethroid and diamide insecticides respectively.Mutations in the adenosine triphosphate-binding cassette transporter C2 gene(ABCC2)have also been identified to confer resistance to Cry IF protein.In this study,we applied a whole-genome sequencing(WGS)approach to identify point mutations in the target-site genes in 150 FAW individuals collected from China,Malawi,Uganda and Brazil.This approach revealed three amino acid substitutions(A201S,G227A and F290V)of S.frugiperda ace-1,which are known to be associated with organophosphate resistance.The Brazilian population had all three ace-1 point mutations and the 227A allele(mean frequency=0.54)was the most common.Populations from China,Malawi and Uganda harbored two of the three ace-1 point mutations(A201S and F290V)with the 290V allele(0.47-0.58)as the dominant allele.Point mutations in VGSC(T929I,L932F and L1014F)and RyR(I4790M and G4946E)were not detected in any of the 150 individuals.A novel 12-bp insertion mutation in exon 15 of the ABCC2 gene was identified in some of the Brazilian individuals but absent in the invasive populations.Our results not only demonstrate robustness of the WGS-based genomic approach for detection of resistance mutations,but also provide insights for improvement of resistance management tactics in S.frugiperda.
基金the financial support of the project from the National Natural Science Foundation of China(No.41706080 and 51702328)the Key Research Program of Frontier Sciences,CAS(ZDBS-LY-DQC025)+2 种基金the National Natural Science Foundation of China for Exploring Key Scientific Instrument(No.41827805)the Basic Scientific Fund for National Public Research Institutes of China(2019Y03 and 2020S02)the Open Fund of Shandong Key Laboratory of Corrosion Science(KLCS201906)。
文摘Biofilm plays an important role on microbial corrosion and biofouling in marine environments.Inhibiting biofilm formation on construction surfaces is of great importance.Photocatalytic material with visiblelight response,especially BiVO_(4),is regarded as a promising material for biofilm inhibition due to its green biocidal effect and high antibacterial efficiency.Approaches which can immobilize the photocatalytic particles onto metal surfaces with high mechanical strength are requisite.In this study,zinc matrixes were served as carriers for BiVO_(4)particles.The BiVO_(4)-inserted zinc matrixes were successfully obtained by ultrasound assisted electrodeposition.The insertion content of BiVO_(4)showed positive correlation with ultrasound power.Highly enhanced biofilm inhibition properties were obtained by BiVO_(4)inserted zinc·matrixes with an over 95%decreased bacterial coverage.It was proved that O2-(chief)andOH(subordinate)radicals were responsible for the high biocidal performance.Possible antibacterial mechanism was proposed,indicating that the photoinduced holes would both attack zinc crystals to generate active electrons to form O2-radicals,and react with H2 O to generate·OH,finally.Furthermore,corrosion resistance of the matrixes was proved to be stable due to the insertion of BiVO_(4).This study provides a potential application for photocatalyst in marine antifouling and anti-biocorrosion aspects.
基金This work was supported by the China National Key Basic Research Program(2018YFA0306201)the National Science Foundation of China(11774063,11727811,and 91963212)+1 种基金A.C.was supported by the Shanghai Rising-Star Program(20QR1402200)L.S.was further supported by the Science and Technology Commission of Shanghai Municipality(19XD143600,2019SHZDZX01,19DZ2253000,20501110500).
文摘The thin-film optical inverse problem has attracted a great deal of attention in science and industry,and is widely applied to optical coatings.However,as the number of layers increases,the time it takes to extract the parameters of thin films drastically increases.Here,we introduce the idea of exploiting the structural similarity of all-optical neural networks and applied it to the optical inverse problem.We propose thin-film neural networks(TFNNs)to efficiently adjust all the parameters of multilayer thin films.To test the performance of TFNNs,we implemented a TFNN algorithm,and a reflectometer at normal incidence was built.Operating on multilayer thin films with 232 layers,it is shown that TFNNs can reduce the time consumed by parameter extraction,which barely increased with the number of layers compared with the conventional method.TFNNs were also used to design multilayer thin films to mimic the optical response of three types of cone cells in the human retina.The light passing through these multilayer thin films was then recorded as a colored photo.
