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Functional characterization of pheromone receptor candidates in codling moth Cydia pomonella(Lepidoptera:Tortricidae)

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Insect Science 2021年第2期28卷 445-456页

作者： ke tian Wei Liu Li-Kai Feng tian-Yu Huang Gui-Rong Wang ke-Jian Lin State key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina Institute of Plant Protection Xinjiang Academy of Agricultural and Reclamation ScienceShiheziXinjiang Uygur Autonomous RegionChina Lingnan Guangdong Laboratory of Modern Agriculture Genome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong ProvinceChina

Sex pheromones serve a critical role in Lepidopterans finding *** moths perceive and react to sex pheromones emitted by conspecific females through a delicate pheromone communication *** receptors(PRs)are the key sensory elements at the beginning of that *** codling moth(Cydia ponwonella)is an important pome fruit pest globally and a serious invasive species in *** techniques have been used successfully in monitoring and controlling this *** conducted ribonucleic acid sequencing analysis of the codling moth antennal transcriptome and identified 66 odorant receptors(ORs)in a population from Xinjiang province,China,of which 14 were PRs,including two novel PRs(CpomOR2e and CpomOR73).Four PRs that contain full-length open reading frames(CpomORl,OR2a,OR5,OR7)and four PRs with ligands that have not been reported previously(CpomORl,OR2a,OR5,OR7)were selected to deorphanize in the heterologous Xenopus oocyte expression ***,we found that CpomOR2a and CpomOR5 responded to(£,£)-8,10-dodecadien-l-yl acetate(codlemone acetate).Furthermore,CpomOR5(EC50=1.379 x 10-8 mol/L)was much more sensitive to codlemone acetate than CpomOR2a(EC50=1.663×10^(-6) mol/L).Since codlemone acetate is an important component of *** sex pheromone,our results improve the current understanding of pheromone communication in codling moths and will be helpful for the development of pest management strategies.

关键词： antennal transcriptome codlemone acetate Cydia pomonella',pheromone receptor

Machine learning method to predict dynamic compressive response of concrete-like material at high strain rates

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Defence Technology（防务技术） 2023年第5期23卷 100-111页

作者： Xu Long Ming-hui Mao tian-xiong Su Yu-tai Su Meng-ke tian School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'anChina School of Civil Engineering Liaoning Petrochemical UniversityFushunChina Beijing Microelectronics Technology Institute BeijingChina

Machine learning(ML)methods with good applicability to complex and highly nonlinear sequences have been attracting much attention in recent years for predictions of complicated mechanical properties of various *** one of the widely known ML methods,back-propagation(BP)neural networks with and without optimization by genetic algorithm(GA)are also established for comparisons of time cost and prediction *** the aim to further increase the prediction accuracy and efficiency,this paper proposes a long short-term memory(LSTM)networks model to predict the dynamic compressive performance of concrete-like materials at high strain *** explicit analysis is performed in the finite element(FE)software ABAQUS to simulate various waveforms in the split Hopkinson pressure bar(SHPB)experiments by applying different stress waves in the incident *** FE simulation accuracy is validated against SHPB experimental results from the viewpoint of dynamic increase *** order to cover more extensive loading scenarios,60 sets of FE simulations are conducted in this paper to generate three kinds of waveforms in the incident and transmission bars of SHPB *** training the proposed three networks,the nonlinear mapping relations can be reasonably established between incident,reflect,and transmission *** measures are used to quantify the network prediction accuracy,confirming that the predicted stress-strain curves of concrete-like materials at high strain rates by the proposed networks agree sufficiently with those by FE *** is found that compared with BP network,the GA-BP network can effectively stabilize the network structure,indicating that the GA optimization improves the prediction accuracy of the SHPB dynamic responses by performing the crossover and mutation operations of weights and thresholds in the original BP *** eliminating the long-time dependencies,the proposed LSTM network achieves better results than the BP

关键词： Deep learning LSTM network GA-BP network Dynamic behaviour Concrete-like materials

Recent progress on multifunctional electromagnetic interference shielding polymer composites

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Journal of Materials Science & Technology 2023年第3期134卷 106-131页

作者： ke tian Danrong Hu Quan Wei Qiang Fu Hua Deng College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China Rehabilitation Medicine Center and Institute of Rehabilitation Medicine Key Laboratory of Rehabilitation Medicine in Sichuan ProvinceWest China HospitalSichuan UniversityChengdu 610041China

The explosive development of electronic devices and wireless communication technology gives rise to the issue of electromagnetic pollution,known as electromagnetic interference(EMI).The accumulation of undesirable electromagnetic radiation in space disturbs the normal function of unshielded electronic appliances and poses seriously threat to human ***,the development of EMI shielding materials have emerged to solve the grim *** the complex application contexts,EMI shielding materials have evolved from traditional single-function to multi-functions to meet the ever-increasing application requirements in recent few *** paper provides detailed insight into the current re-search status and future challenges in the advancement of polymer-based EMI shielding materials with various ***,the basic theory of EMI shielding,factors influencing results and the dominating characterization technologies for EMI shielding properties are ***,the comprehensive descriptions of the seven types of multifunctional EMI shields are provided with respect to their structures,fabrication methods and specific ***,the corresponding critical scientific and technical issues are *** on our comprehensive analysis,the main challenges in the development of multifunctional EMI shielding materials are *** review aims to provide some guidance and inspire more efforts toward functional EMI shielding material research to satisfy the growing requirements for next-generation electronic systems.

关键词： Polymer-based composites Electromagnetic interference shielding Multiple losses Multifunctionality

An Innovative Approach to Separate Iron Oxide Concentrate from High-sulfur and Low-grade Pyrite Cinders

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Journal of Iron and Steel Research International 2016年第8期23卷 756-764页

作者： Yong LI Fu-chun ZHOU Zhao-xin ZHOU Zhi-han tian Chao YANG Xi-ke tian Faculty of Materials Science and Chemistry China University of Geosciences

High-sulfur and low-grade pyrite cinders are the waste products of sulfuric acid manufacturing *** valuable components,such as iron oxide,are contained in pyrite cinders and difficult to be separated and purified just via the high temperature roasting *** this,an innovative method including water-washing,aqua regia leaching,hydrothermal alkali activation and acid-washing was *** the effects of different parameters on recovery efficiency of iron oxide were systematically *** optimum parameters were proposed as follows：water rinse-leaching at room temperature for 5-20 min,and melting at 160 ℃ for 2.0h with NaOH（concentration of 30mass%）,followed by leaching with aqua regia solution（3.0vol.%）for *** the treatment,the content of iron oxides increased from 54.3to 96.0mass% with the recovery rate exceeding 85%.Meanwhile,calcium sulphate was recovered as the high value-added products by alkali extraction ***,the phase transformation and microstructure of the samples in the process were studied by physicochemical methods to reveal the separation mechanisms of different components in the pyrite cinders.

关键词： sulfur leaching contained alkali regia pyrite recovered hydrothermal systematically leached

A new flavone glycoside from Selaginella moellendorffii Hieron.

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Chinese Chemical Letters 2008年第12期19卷 1456-1458页

作者： tian Mi Zhu ke Li Chen Wen Bing Zhou key Laboratory of Traditional Chinese Medicine Resource and Compound Prescription Ministry of Education Hubei College of Traditional Chinese Medicine Wuhan 430065 China

From the ethanol extract of Selaginella moellendorffii Hieron., a new flavone O-glycoside and three known flavone C-glycosides have been isolated and identified as 5-carboxymethyl-4′-hydroxyflavone-7-O-β-D-glucopyranoside 1, 6,8-di-C-β-D-glueopyranosylapigenin 2, 6-C-[3-D-glucopyranosyl-8-C-β-D-xylopyranosyl apigenin 3, 6-C-B-D-xylopyranosyl-8-C-β-glucopyranosylapigenin 4, respectively. Their structures were elucidated by spectroscopic methods.

关键词： SelagineUa moellendorf-fii 5-Carboxymethyl-4-hydroxyflavone-7-O-β-D-glucopyranoside New flavone glycoside

Recent development on the design,preparation,and application of stretchable conductors for flexible energy harvest and storage devices

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SusMat 2024年第4期4卷 175-210页

作者： Minhan Cheng ke tian tian Qin Qianyang Li Hua Deng Qiang Fu College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduChina

The intensifying energy crisis has made it urgent to develop robust and reli-able next-generation energy *** for conventional large-scale energy sources,the imperceptible and randomly distributed energy embedded in daily life awaits comprehensive exploration and *** the latent energy has the potential to facilitate the further evolution of soft energy *** with rigid energy devices,flexible energy devices are more convenient and suitable for harvesting and storing energy from dynamic and complex structures such as human *** conductors that are capable of withstanding strain(≫1%)while sustaining stable conductive pathways are prerequisites for realizing flexible electronic energy ***,under-standing the characteristics of these conductors and evaluating the feasibility of their fabrication strategies are particularly *** this review,various prepa-ration methods for stretchable conductors are carefully classified and ***,recent progress in the application of energy harvesting and stor-age based on these conductors is discussed in ***,the challenges and promising opportunities in the development of stretchable conductors and inte-grated flexible energy devices are highlighted,seeking to inspire their future research directions.

关键词： energy harvesting energy storage fabrication strategies stretchable conductors

Recent advances in persulfate-based advanced oxidation processes for organic wastewater treatment

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Chinese Chemical Letters 2022年第10期33卷 4461-4477页

作者： ke tian Limin Hu Letian Li Qingzhu Zheng Yanjun Xin Guangshan Zhang College of Resource and Environment Qingdao Engineering Research Center for Rural EnvironmentQingdao Agricultural UniversityQingdao 266109China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China

In recent years,with the emergence of new pollutants,the effective treatment of wastewater has become very ***-based advanced oxidation processes have been successfully applied to the treatment of wastewater,such as wastewater containing antibiotics,pharmaceuticals and personal care products,dyes,endocrine-disrupting chemicals,chlorinated organic pollutants,and phenolics,for the degradation of refractory organic *** paper summarizes the production of sulfate radicals,which can be generated by the activation of persulfate via conventional and emerging *** existing problems of persulfate-based advanced oxidation processes were analyzed in detail,including residual sulfates,coexisting factors(coexisting inorganic anions and natural organic matter),and energy *** paper proposes corresponding possible solutions to the problems mentioned above,and this paper could provide a reference for the application of persulfate-based advanced oxidation processes in actual wastewater treatment.

关键词： Persulfate Sulfate radical Activation Organic wastewater Advanced oxidation processes

Longitudinal impedance measurements and simulations of a three-metal-strip kicker

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Nuclear Science and Techniques 2023年第4期34卷 115-126页

作者： Jin-Liu Su Yu-Dong Liu Sai-ke tian Lei Wang Na Wang Sen Yue Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

A kicker is a critical component for beam injection and accumulation in circular particle accelerators. A ceramic slat kicker plated with a TiN conductive coating was applied in the Beijing Electron Positron Collider (BEPCII). However, the ceramic slat kicker has experienced several sudden malfunctions during the operation of the BEPCII in the past. With a reliable kicker structure, a three-metal-strip kicker can substitute the original ceramic slat kicker to maintain the operational stability of the BEPCII. A comparison of the numerical simulation was conducted for three kicker models, demonstrating the comprehensive advantage of the three-metal-strip kicker. Furthermore, impedance bench measurements were conducted on a prototype of a three-metal-strip kicker. The longitudinal beam-coupling impedance was measured using a vector network analyzer via the coaxial wire method. A satisfactory agreement was obtained between the numerical simulations and measurements. Based on the numerical simulation data, the loss factor was 0.01721 V/pC, and the effective impedance was 3.59 mΩ(σ=10 mm).The simulation of the heat deposition on each part of the kicker demonstrated that 84.4%of the parasitic loss of the beam was deposited on the metal strips, and the total heat deposition power on the kicker was between 113.3 and 131.5 W. The obtained heat deposition powers can be considered as a reference for establishing the cooling system.

关键词： Ceramic slat kicker Three-metal-strip kicker Impedance bench measurement Coaxial wire method Heat deposition power

The general odorant receptor GmolOR9 from Grapholita molesta (Lepidoptera: Tortricidae) is mainly tuned to eight host-plant volatiles

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Insect Science 2020年第6期27卷 1233-1243页

作者： Li-Hui Chen ke tian Gui-Rong Wang Xiang-Li Xu ke-Hang He Wei Liu Jun-Xiang Wu State key Laboratory of Crop Stress Biology in Arid areas College of Plant ProtectionNorthwest A&F UniversityYanglingChina State key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina

Grapholita molesta is one of the most destructive fruit pests distributed *** receptors(ORs)located on the dendritic membrane of chemosensory neurons are deemed to be key molecules for sensing exogenous chemical *** this study,GmolOR9,a general OR from ***,was functionally *** real-time polymerase chain reaction revealed that GniolOR9 was more highly expressed in adults than in other stages,including eggs,larvae,and ***9 expression was highly significantly more in the antennae of females than in those of males,and the highest level occurred in the antennae of 3-day-old female ***9 was broadly tuned to eight of 47 odorant components tested including(Z)-3-hexenyl acetate,butyl propionate,ethyl hexanoate,ethyl heptanoate,1-hexanol,(Z)-3-hexenol,2-ethyl-1-hexanol,and linalool,by in vitro heterologous ***,electroantennogram responses indicated that the efTects of dsOR9-injected females to(Z)-3-hexenyl acetate dramatically *** results suggested that GmolOR9 might be involved in detecting hostplant ***,(Z)-3-hexenyl acetate might serve as a potential attractant for the biological control of ***.

关键词： Grapholita molesta oriental fruit moth odorant receptor volatiles