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Epigenetic regulation of plant immunity:from chromatin codes to plant disease resistance

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aBIOTECH 2023年第2期4卷 124-139页

作者： Si-Si Xie Cheng-guo duan Shanghai Center for Plant Stress Biology and CAS Center for Excellence in Molecular Plant Sciences Chinese Academy of SciencesShanghai 200032China University of the Chinese Academy of Sciences Beijing 100049China

Facing a deteriorating natural environment and an increasing serious food crisis,bioengineering-based breeding is increasing in *** defend against pathogen infection,plants have evolved multiple defense mechanisms,including pathogen-associated molecular pattern(PAMP)-triggered immunity(PTI)and effector-triggered immunity(ETI).A complex regulatory network acts downstream of these PTI and ETI pathways,including hormone signal transduction and transcriptional *** recent years,increasing lines of evidence show that epigenetic factors act,as key regulators involved in the transcriptional reprogramming,to modulate plant immune ***,we summarize current progress on the regulatory mechanism of DNA methylation and histone modifications in plant defense *** addition,we also discuss the application of epigenetic mechanism-based resistance strategies in plant disease breeding.

关键词： Histone modification DNA methylation Transcriptional reprogramming Plant immunity Disease resistance

Degree elevation of unified and extended spline curves

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第12期15卷 1098-1105页

作者： Xiao-juan duan guo-zhao WANG Department of Mathematics Zhejiang University

Unified and extended splines(UE-splines), which unify and extend polynomial, trigonometric, and hyperbolic B-splines, inherit most properties of B-splines and have some advantages over B-splines. The interest of this paper is the degree elevation algorithm of UE-spline curves and its geometric meaning. Our main idea is to elevate the degree of UE-spline curves one knot interval by one knot interval. First, we construct a new class of basis functions, called bi-order UE-spline basis functions which are defined by the integral definition of *** some important properties of bi-order UE-splines are given, especially for the transformation formulae of the basis functions before and after inserting a knot into the knot vector. Finally, we prove that the degree elevation of UE-spline curves can be interpreted as a process of corner cutting on the control polygons, just as in the manner of B-splines. This degree elevation algorithm possesses strong geometric intuition.

关键词： Degree elevation Unified and extended splines(UE-splines) Bi-order UE-splines Corner cutting Geometric explanation

NUAT T-splines of odd bi-degree and local refinement

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Applied Mathematics(A Journal of Chinese Universities) 2014年第4期29卷 410-421页

作者： duan Xiao-juan WANG guo-zhao Department of Mathematics Zhejiang University

This paper presents a new kind of spline surfaces, named non-uniform algebraic- trigonometric T-spline surfaces （NUAT T-splines for short） of odd hi-degree. The NUAT T- spline surfaces are defined by applying the T-spline framework to the non-uniform algebraic- trigonometric B-spline surfaces （NUAT B-spline surfaces）. Based on the knot insertion algorithm of the NUAT B-splines, a local refinement algorithm for the NUAT T-splines is given. This algorithm guarantees that the resulting control grid is a T-mesh as the original one. Finally, we prove that, for any NUAT T-spline of odd hi-degree, the linear independence of its blending functions can be determined by computing the rank of the NUAT T-spline-to-NUAT B-spline transformation matrix.

关键词： odd bi-degree non-uniform algebraic-trigonometric T-spline local refinement blending function,linear independence.

Fabrication of porous adsorbents from eco-friendly aqueous foam for high-efficient removal of cationic dyes and sustainable utilization assessment

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Journal of Environmental Sciences 2024年第3期137卷 395-406页

作者： Fangzhi duan Yongfeng Zhu yan Liu Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Porous materials applied in environmental remediation have received researchers'extensive attention recently,but the related green and convenient preparation method is rarely ***,we recommended a green and convenient strategy for the fabrication of porous material via aqueous foam templates,which was synergistically stabilized by Codonopsis pilosula(CP)and clay minerals of attapulgite(APT).The characterization results revealed that the APT was modified by organic molecules leached from CP and anchored at the air-water interface,which improved the foam stability *** novel porous material of polyacrylamide/Codonopsis pilosula/attapulgite(PAM/CP/APT)templated from the aqueous foam via a polymerization reaction had excellent adsorption capacity for the cationic dyes methyl violet(MV)and methylene blue(MB),and the adsorption capacity can reach 755.85 mg/g and557.64 mg/g,*** importantly,the adsorption capacity of spent adsorbent material was still over 200 mg/g after being recycled five times through a simple carbonization process,and then it was added to the plant pot,the total biomass was increased by about86.42%.This study provided a green and sustainable pathway for the preparation,application and subsequent processing of porous materials.

关键词： Porous material Aqueous foam Atapulgite Adsorption Cationic dyes Sustainable utilization

A CHARACTERISTIC-BASED FINITE VOLUME SCHEME FOR SHALLOW WATER EQUATIONS

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Journal of Hydrodynamics 2009年第4期21卷 531-540页

作者： guo yan LIU Ru-xun duan Ya-li LI Yuan Department of Mathematics University of Science and Technology of China Hefei 230026 China Department of Mathematics China University of Mining and Technology XuZhou 221116 China

We propose a new characteristic-based finite volume scheme combined with the method of Central Weighted Essentially Non-Oscillatory （CWENO） reconstruction and characteristics, to solve shallow water equations. We apply the scheme to simulate dam-break problems. A number of challenging test cases are considered, such as large depth differences even wet/dry bed. The numerical solutions well agree with the analytical solutions. The results demonstrate the desired accuracy, high-resolution and robustness of the presented scheme.

关键词： shallow water equations finite volume method characteristic method Central Weighted Essentially Non-Oscillatory (CWENO) scheme HLLC flux

Two-Dimensional Graphitic Carbon-Nitride(g-C_(3)N_(4))-Coated LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) Cathodes for High-Energy-Density and Long-Life Lithium Batteries

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Energy & Environmental Materials 2024年第6期7卷 140-149页

作者： Zhenliang duan Pengbo Zhai Ning Zhao Xiangxin guo College of Physics Qingdao UniversityQingdao 266071China College of Materials Science and Engineering Qingdao UniversityQingdao 266071China Tianmushan Laboratory Xixi Octagon CityHangzhou 310023China

High-capacity nickel-rich layered oxides are promising cathode materials for high-energy-density lithium ***,the poor structural stability and severe side reactions at the electrode/electrolyte interface result in unsatisfactory cycle ***,the thin layer of two-dimensional(2D)graphitic carbon-nitride(g-C_(3)N_(4))is uniformly coated on the LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(denoted as NCM811@CN)using a facile chemical vaporization-assisted synthesis *** an ideal protective layer,the g-C_(3)N_(4)layer effectively avoids direct contact between the NCM811 cathode and the electrolyte,preventing harmful side reactions and inhibiting secondary crystal ***,the unique nanopore structure and abundant nitrogen vacancy edges in g-C_(3)N_(4)facilitate the adsorption and diffusion of lithium ions,which enhances the lithium deintercalation/intercalation kinetics of the NCM811 *** a result,the NCM811@CN-3wt%cathode exhibits 161.3 mAh g^(−1)and capacity retention of 84.6%at 0.5 C and 55°C after 400 cycles and 95.7 mAh g^(−1)at 10 C,which is greatly superior to the uncoated NCM811(i.e.129.3 mAh g^(−1)and capacity retention of 67.4%at 0.5 C and 55°C after 220 cycles and 28.8 mAh g^(−1)at 10 C).The improved cycle performance of the NCM811@CN-3wt%cathode is also applicable to solid–liquid-hybrid cells composed of PVDF:LLZTO electrolyte membranes,which show 163.8 mAh g^(−1)and the capacity retention of 88.1%at 0.1 C and 30°C after 200 cycles and 95.3 mAh g^(−1)at 1 C.

关键词： cathode materials g-C_(3)N_(4) coating LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) lithium batteries PVDF:LLZTO electrolyte membranes

Intestinal toxicity of deoxynivalenol is limited by supplementation with Lactobacillus plantarum JM113 and consequentially altered gut microbiota in broiler chickens

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Journal of Animal Science and Biotechnology 2019年第1期10卷 218-230页

作者： Shengru Wu yanli Liu Yongle duan Fangyuan Wang Fangshen guo Fang yan Xiaojun yang Xin yang College of Animal Science and Technology Northwest A&F University College of animal science and Technology Hebei Agricultural University

Background: Limited research has focused on the effect of Lactobacillus on the intestinal toxicity of deoxynivalenol(DON).The present study was conducted to investigate the role of Lactobacillus plantarum(***) JM113 in protecting against the intestinal toxicity caused by ***: A total of 144 one-day-old healthy Arbor Acres broilers were randomly distributed into 3 treatments,including the CON(basal diet),the DON(extra 10 mg/kg deoxynivalenol),and the DL(extra 1 × 109 CFU/kg *** JM113 based on DON group) *** growth performance,organ indexes,intestinal morphology,pancreatic digestive enzymes,intestinal secreted immunoglobulin A(sIgA),jejunal transcriptome,and intestinal microbiota were ***: Compared with the CON and DL groups,the DON supplementation altered intestinal morphology,especially in duodenum and jejunum,where villi were shorter and crypts were deeper(P < 0.05).Meanwhile,the significantly decreased mRNA expression of jejunal claudin-1 and occludin(P < 0.05),ileal rBAT and jejunal GLUT1 of 21-day-old broilers(P < 0.05),as well as duodenal PepT1 and ileal rBAT of 42-day-old broilers were identified in the DON ***,supplementation with *** JM113 could increase duodenal expression of IL-10 and IL-12 of 21-dayold broilers,ileal s IgA of 42-day-old broilers,and the bursa of Fabricius index of 21-day-old *** jejunal transcriptome proved that the genes related to the intestinal absorption and metabolism were significantly reduced in the DON group but a significant increase when supplemented with extra *** ***,the bacteria related to nutrient utilization,including the Proteobacteria,Escherichia,Cc-115(P < 0.05),Lactobacillus and Prevotella(P < 0.1) were all decreased in the DON *** contrast,supplementation with *** JM113 increased the relative abundance of beneficial bacterium,including the Bacteroidetes,Roseburia,Anaerofustis,Anaerostipe,and Ruminococcus

关键词： Broiler chickens Deoxynivalenol Gut microbiota Lactobacillus plantarum JM113 mRNA sequencing 16S rRNA gene sequencing

Nonreciprocal metasurface with space-time phase modulation

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Light(Science & Applications) 2019年第1期8卷 30-38页

作者： Xuexue guo Yimin Ding Yao duan Xingjie Ni Department of Electrical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA

Creating materials with time-variant properties is critical for breaking reciprocity that imposes fundamental limitations on wave ***,it is challenging to realize efficient and ultrafast temporal modulation in a photonic ***,leveraging both spatial and temporal phase manipulation offered by an ultrathin nonlinear metasurface,we experimentally demonstrated nonreciprocal light reflection at wavelengths around 860 *** metasurface,with travelling-wave modulation upon nonlinear Kerr building blocks,creates spatial phase gradient and multi-terahertz temporal phase wobbling,which leads to unidirectional photonic transitions in both the momentum and energy *** observed completely asymmetric reflections in forward and backward light propagations over a large bandwidth around 5.77 THz within a sub-wavelength interaction length of 150 *** approach highlights a potential means for creating miniaturized and integratable nonreciprocal optical components.

关键词： reciprocal phase nonlinear

Effects of CuInS_(2)nanoparticles on the alignment control of liquid crystals

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Nano Research 2022年第8期15卷 7542-7548页

作者： Dongyu Zhao Yuanyuan guo Weihua Bi Xin Li Ran duan Lin guo Beijing Advanced Innovation Center for Biomedical Engineering School of ChemistryBeihang UniversityBeijing 100191China

Liquid crystal-nanoparticle composite systems have attracted particular attention for both academic interests and applications in inducing macroscopic alignment,altering electro-optic response of the liquid crystal hosts,and generating ordered,tunable soft ***,the synthesis of two shapes of CuInS_(2)nanoparticles,tremelliform-like CuInS_(2)and frame-like CuInS_(2),and their utilization in producing uniform homeotropic alignment of liquid crystals are *** exploring the mechanism in detail,the crystal structures of CuInS_(2)nanoparticles were found to rely heavily on the reaction solvents during the growth process,which in turn play a significant role on the anchor of liquid crystal *** achieved homeotropic alignment shows high thermal stability,owing to the outstanding stability of the CuInS_(2)*** addition,combining this feasible method with parallel-aligning technique,variable pretilt angles in a range of~0.9°to~7.2°could be continuously achieved.

关键词： CuInS_(2)nanoparticles morphology liquid crystals alignment pretilt angle