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Determining the major Bt refuge crops for cotton bollworm in North China

Insect Science 2015年第6期22卷 829-839页

作者： Le-Fu Ye xue Fu Fang Ouyang bao-yu Xie Feng Ge State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Beijing College of Agriculture Northeast Agricultural University Harbin College of Agricultural Resource and Environment HeilongjiangUniversity Harbin China

Evaluation of the effectiveness of refuge strategies involved in cotton boll- worm Bt resistance management would be aided by technologies that allow monitoring and quantification of key factors that affect the process under field conditions. We hy- pothesized that characterization of stable carbon and nitrogen isotopes in adult bollworm, Helicoverpa armigera （Htibner）（Lepidoptera： Noctuidae） moths may aid in determining the larval host that they developed upon. We found moths reared from larvae fed on peanut, soybean or cotton, respectively, could be differentiated using isotopic analyses that also corresponded to their respective larval host origins. These techniques were then used to classify feral second-generation bollworm moths caught in Bt cotton （Gossypium hirsu- rum） fields into different populations based on their isotopic signatures. In 2006-2007 feral moths captured in Bt cotton fields predominantly correlated with the peanut （Arachis hypogea） having served as their larval host, indicating this is the most important refuge crop for Bt-susceptible bollworm individuals （providing 58%-64% individuals） during independent moth peaks for the second generation in North China. The remaining feral moths correlated with soybean （Glycine max）（0-10%）; other C3 plant （20%-22%） and non-C3 plant （12%-14%） host types also provided some Bt-sensitive moths. Field obser- vations showed that peanut constitutes the primary refuge crop contributing to sustaining Bt-susceptible moths dispersing into cotton in North China. These results suggest that peanut may be a more effective refuge to sustain Bt-susceptible bollworm individuals and reduce the risk of development of a Bt-resistant biotype.

关键词： cluster analysis cotton bollworm host plant stable isotope transgenic Bt-cotton

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The Consistency of LSE Estimators in Partial Linear Regression Models under Mixing Random Errors

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1244-1272页

作者： yun bao YAO yu Tan LÜ Chao LU Wei WANG xue Jun WANG School of Mathematical Sciences Anhui UniversityHefei 230601P.R.China School of Big Data and Artificial Intelligence Chizhou UniversityChizhou 247000P.R.China School of Big Data and Statistics Anhui UniversityHefei 230601P.R.China

In this paper,we consider the partial linear regression model y_(i)=x_(i)β^(*)+g(ti)+ε_(i),i=1,2,...,n,where(x_(i),ti)are known fixed design points,g(·)is an unknown function,andβ^(*)is an unknown parameter to be estimated,random errorsε_(i)are(α,β)-mix_(i)ng random *** p-th(p>1)mean consistency,strong consistency and complete consistency for least squares estimators ofβ^(*)and g(·)are investigated under some mild *** addition,a numerical simulation is carried out to study the finite sample performance of the theoretical ***,a real data analysis is provided to further verify the effect of the model.

关键词： (α,β)-mixing random variables partial linear regression model least squares estimator consistency

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Amino acid assisted aqueous synthesis of highly stable CsPbBr_(3)nanocrystals for cell imaging

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Nano Research 2025年第1期18卷 675-683页

作者： xue Li Yanan Guo Guoying Tan Qingyi Liu Nan Song yu Tang State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Lead halide perovskite nanocrystals(NCs)exhibit excellent optoelectronic performance and have drawn great interests in the fields of biological imaging and ***,the poor stability of CsPbX_(3)(X=Cl,Br,I)in water is still a challenge to hinder their practical *** this work,a facile strategy has been developed for aqueous synthesis of CsPbX_(3) nanocrystals,in which L-glutamic acid(LGlu)has been used to replace oleic acid in the synthetic *** from the synergic effects of L-Glu and oleylamine(OAm),CsPbBr_(3)nanocrystals(L-Glu/OAm-CsPbBr_(3)NCs)with high water stability have been directly prepared under a mild condition at room temperature in water,facilitated by the process of crystal phase transformation from Cs_(4)PbBr_(6) to CsPbBr_(3).L-Glu/OAm-CsPbBr_(3)NCs exhibit a high quantum yield of 85%and a narrow full width at half maximum of 16 nm,demonstrating their efficient luminescence in ***,L-Glu on the surface have contributed greatly to an acidic environment and passivation of surface defects,improving the water stability and dispersibility of CsPbBr_(3)***,L-Glu/OAm-CsPbBr_(3)NCs exhibit great biocompatibility due to the presence of L-Glu,resulting in their good performance for HeLa cell ***,we propose a facile and effective method to prepare CsPbBr_(3)nanocrystals with excellent water stability by using L-Glu and OAm as cooperated ligands and expand their application in cell imaging.

关键词： aqueous synthesis cell imaging lead halide perovskite nanocrystals L-glutamic acid phase transformation

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SYNTHESIS AND CHARACTERIZATION OF FUNCTIONALIZED CARBON BLACK/POLY(VINYL ALCOHOL) HIGH REFRACTIVE INDEX NANOCOMPOSITES

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Chinese Journal of Polymer Science 2012年第5期30卷 652-663页

作者： Peng-fei xue Ji-bin Wang yu-bin bao 李秋影 Chi-fei Wu Polymer Alloy Laboratory and Key Laboratory of Ultrafine Materials of Ministry of Education East China University of Science and TechnologyShanghai200237China Shanghai Key Laboratory Polymeric Materials East China University of Science and TechnologyShanghai200237China

Carbon black （CB）/polymer composites with high refractive index （RI） were fabricated from poly（vinyl alcohol）（PVA） and covalently functionalized nano-CB （PVA-es-CB） by simple esterification reaction. Transmission electron microscopy showed that tmifonn aggregates of PVA-es-CB nanoparticles with a size smaller than I00 nm formed in the nanocomposite films. Ellipsometric measurements indicated that the PVA-es-CB/PVA composite films had a RI in the range 1.520-1.598 linearly increased with the PVA-es-CB volume content. Theoretical equation based on Lorentz-Lorenz theory provided reasonably close estimation of the refractive indices to the experimentally observed values. The hybrid films also revealed relatively good surface planarity, thermal stability and optical transparency.

关键词： High refractive index Carbon black Poly(vinyl alcohol) Nanocomposite.

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Batroxobin inhibits astrocyte activation following nigrostriatal pathway injury

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Neural Regeneration Research 2021年第4期16卷 721-726页

作者： Zhuo Zhang xue bao Dan Li Department of Human Anatomy College of Basic Medical SciencesChina Medical UniversityShenyangLiaoning ProvinceChina

Batroxobin is a thrombin-like serine protease from the venom of the Bothrops atrox and Bothrops moojeni snake *** 1(Sirt1)has been shown to play an important role in neuroprotection after traumatic brain ***,its underlying mechanism of action remains poorly *** purpose of this study was to investigate whether the mechanism by which batroxobin participates in the activation of astrocytes is associated with *** models of nigrostriatal pathway injury were *** after modeling,mice were intraperitoneally administered 39 U/kg *** significantly reduced the expression of cleaved caspase-3 in both the substantia nigra and striatum,inhibited neuronal apoptosis,and promoted the recovery of rat locomotor *** changes coincided with a remarkable reduction in astrocyte *** also reduced Sirt1 expression and extracellular signal-regulated kinase activation in brain *** administration of the Sirt1-specific inhibitor EX527(5 mg/kg)30 minutes prior to injury could inhibit the abovementioned *** mouse astrocyte cultures,1 ng/mL batroxobin attenuated interleukin-1β-induced activation of astrocytes and extracellular signal-regulated ***527 could also inhibit the effects of *** findings suggest that batroxobin inhibits astrocyte activation after nigrostriatal pathway injury through the Sirt1 *** study was approved by the Animal Ethics Committee of China Medical University,China(approval ***2020037)on July 19,2015.

关键词： astrocyte brain central nervous system factor injury pathway

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Testing Linearity in Functional Partially Linear Models

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Acta Mathematicae Applicatae Sinica 2024年第3期40卷 875-886页

作者： Fan-rong ZHAO bao-xue ZHANG School of Mathematical Sciences Shanxi UniversityTaiyuan 030006China School of Statistics Capital University of Economics and BusinessBeijing 100070China

For the functional partially linear models including flexible nonparametric part and functional linear part,the estimators of the nonlinear function and the slope function have been studied in existing *** to test the correlation between response and explanatory variables,however,still seems to be ***,a test procedure for testing the linearity in the functional partially linear models will be proposed in this paper.A test statistic is constructed based on the existing estimators of the nonlinear and the slope ***,we prove that the approximately asymptotic distribution of the proposed statistic is a chi-squared distribution under some regularity ***,some simulation studies and a real data application are presented to demonstrate the performance of the proposed test statistic.

关键词： asymptotic theory functional partially linear model Nadaraya-Watson estimate test statistic

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Weighting Function Modification Used for Phase Transform-Based Time Delay Estimation

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China Communications 2022年第11期19卷 241-256页

作者： xue Yang Changchun bao Zihao Cui Speech and Audio Signal Processing Laboratory Faculty of Information TechnologyBeijing University of TechnologyBeijing 100124China

Generalized cross-correlation is considered as the most straightforward time delay estimation *** on various weighting function,different methods were derived and a straightforward method,named phase transform(PHAT)has been widely *** is well-known for its robustness to reverberation and its sensitivity to noise,which is partly due to the fact that PHAT distributes same weights to the frequencies dominated by signal or *** alleviate this problem,two weighting functions are proposed in this *** taking a posteriori signal-to-noise ratio(SNR)into account to classify reliable and unreliable frequencies,different weights could be *** first proposed weighting function borrows the idea of binary mask and distributes same weights to frequencies in same set,whereas,the second one assigns weights based on coherence *** showed the robustness of proposed methods to reverberation and noise for improving the performance of time delay estimation through various criteria.

关键词： time delay estimation generalized crosscorrelation PHAT a posteriori SNR coherence function

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From BIG Data Center to China National Center for Bioinformation

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Genomics, Proteomics & Bioinformatics 2023年第5期21卷 900-903页

作者： Yiming bao Yongbiao xue National Genomics Data Center Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Background Big data challenges In the late 1980s and early 1990s,three major international biological data centers were created:the DNA Database of Japan(DDBJ)[1],the European Bioinformatics Institute(EMBL-EBI)in the ... 详细信息

关键词： centers Center created

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Modeling of Liquid Level and Bubble Behavior in Vacuum Chamber of RH Process

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Journal of Iron and Steel Research International 2016年第4期23卷 305-313页

作者： Yi-hong LI Yan-ping bao Rui WANG Min WANG Qing-xue HUANG yu-gui LI Shanxi Provincal Key Laboratory of Metallurgical Device Design Theory and Technology School of Materials Science and EngineeringTaiyuan University of Science and Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

In the Ruhrstahl-Heraeus （RH） refining process, liquid steel flow pattern in a ladle is controlled by the fluid flow behavior in the vacuum chamber. Potassium chloride solution and NaOH solution saturated with CO2 were respectively used as a tracer to investigate the liquid and gas flow behaviors in the vacuum chamber. Principal compo nent and comparative analysis were made to show the factors controlling mixing and circulation flow rate. The liquid level and bubble behavior in the vacuum chamber greatly affect fluid flow in RH process. Experiments were performed to investigate the effects of liquid steel level, gas flow rate, bubble residence time, and gas injection mode on mixing, decarburization, and void fraction. The results indicate that the mixing process can be divided into three regions： the flow rate affected zone, the concentration gradient-affected zone, and their combination. The liquid steel level in the vacuum chamber of 300 mm is a critical point in the decarburization transition. For liquid level lower than 300 mm, liquid steel circulation controls decarburization, while for liquid level higher than 300mm, bubble behavior is the main controlling factor. During the RH process, it is recommended to use the concentrated bubble injection mode for low gas flow rates and the uniform bubble injection mode for high gas flow rates.

关键词： RH process liquid level vacuum chamber bubble behavior bubble residence time gas injection mode

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Wolbachia-induced expression of kenny gene in testes affects male fertility in Drosophila melanogaster

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Insect Science 2020年第5期27卷 869-882页

作者： John C.Biwot Hua-bao Zhang Chen Liu Jun-xue Qiao Xiao-Qiang yu yu-Feng Wang School of Life Sciences Hubei Key Laboratory of Genetic Regulation and Integrative BiologyCentral China Normal UniversityWuhanChina

Wolbachia are Gram-negative endosymbionts that are known to cause embry-onic lethality when infected male insects mate with uninfected females or with females carrying a different strain of Wolbachia,a situation characterized as cytoplasmice incom-patibility(CD).However,the mechanism of CI is not yet fully understood,although re-cent studies on Drosophila melanogaster have achieved great ***,we found that Wolbachia infection caused changes in the expressions of several immunity-related genes,including significant upregulation of kenny(key),in the testes of *** of key in fly testes led to a significant decrease in egg hatch rates when these fies mate with wild-type ***-infected females could rescue this embryonic ***,in key overexpressing testes terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick-end labeling signal was significantly stronger than in the control testes,and the level of reactive oxygen species was significantly *** of key also resulted in alterations of some other immunity-related gene expressions,including the downregulation of *** of Zn72D in fly testes also led to a significant decrease in egg hatch *** results suggest that Wolbachia might induce the defect in male host fertility by immunity-related pathways and thus cause an oxidative damage and cell death in male testes.

关键词： Drosophila melanogaster key testes Wolbachia Zn72D

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