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Journal of Forestry Research 2015年第4期26卷 833-840页

作者： Binbin Kan Qingcheng Wang wenjuan wu Forestry College of Northeast Forestry University

This study aimed to demonstrate change in spatial correlation between Korean pine （Pinus koraiensis Sieb. et Zucc.） and three rare species, and change in spatial distribution of four species in response to a range of selective cutting intensities. We sampled three plots of mixed Korean pine and broad-leaf forest in Lushuihe Forestry Bureau of Jilin province, China. Plot 1, a control, was unlogged Korean pine broad-leaf forest. In plots 2 and 3, Korean pine was selectively cut at 15 and 30 % intensity, respectively, in the 1970s. Other species were rarely cut. We used point-pattern analysis to research the spatial distributions of four tree species and quantify spatial correlations between Korean pine and the other three species, Amur linden （Tilia amurensis Rupr.）, Manchurian ash （Fraxinus mandshurica Rupr.）, and Mongolian oak （Quercus mongolica Fisch.） in all three plots. The results of the study show that selective cutting at 15 % intensity did not significantly change either the species spatial patterns or the spatial correlation between Korean pine and broadleaf species. Selective cutting at 30 % intensity slightly affected the growth of Korean pine and valuable species in forest communities, and the effect was considered nondestructive and recoverable.

关键词： Korean pine broad-leaf forest Cuttingintensity Rare species Spatial pattern - Spatialcorrelation

Investigation of the Interaction Mechanism between Lignin Structural Units and Enzyme

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Journal of Renewable Materials 2023年第4期11卷 1613-1626页

作者： Lijing Huang Penghui Li Kangjie Jiang wenjuan wu Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing210037China

The effect of lignin structural units on enzymatic hydrolysis of lignocellulosic biomass was investigated,especially the inhibitory role of lignin in non-productive adsorption with *** wood lignin(MWL)was isolated from different hardwoods of poplar,eucalyptus and *** isolated lignin samples were characterized by elemental analysis,gel permeation chromatography,nitrobenzene oxidation and fourier infrared *** mechanism of lignin structural units on enzymatic hydrolysis of cellulose was studied by quartz crystal microbalance(QCM).The results showed that different structural units of lignin had different adsorption capacity for *** results of nitrobenzene oxidation indicated that the S/G ratio(S:syringyl-like lignin structures;G:guaiacyl-like lignin structures)of lignin of poplar was 0.99,that of eucalyptus was 1.92 and that of acacia was *** to the results of QCM,the adsorption capacity of the three lignin films was as follows:Poplar MWL(S/G ratio 0.99)

关键词： Lignin structural unit enzyme adsorption enzymatic hydrolysis

Lignocellulose pretreatment by deep eutectic solvents and related technologies:A review

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Journal of Bioresources and Bioproducts 2023年第1期8卷 33-44页

作者： Penghui Li Chi Yang Zhengwei Jiang Yongcan Jin wenjuan wu Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037China College of Light Industry and Food Engineering Nanjing Forestry UniversityNanjing 210037China

Lignocellulose is the main component of plants and has a wide range of *** high-value production of lignocellulose lies in the biorefinery of lignin,cellulose and *** ad-vantages and disadvantages of traditional lignocellulose pretreatment methods were summarized,and the effective pretreatment parameters were *** a green solvent system with excellent performance,deep eutectic solvents(DES)are considered to be the most potential biomass pre-treatment *** on this,the new trend and progress of DES in lignocellulose pretreatment were reviewed,focusing on the effects of distinct kinds of lignocellulose raw materials,distinct components of DES,distinct reaction conditions and assisted by microwave ultrasound on the pre-treatment of lignocellulose,and the recyclability of DES solution system was ***,the application and development direction of DES in lignocellulose pretreatment are proposed and prospected.

关键词： Deep eutectic solvents Lignin Cellulose Hemicellulose Pretreatment

Microscopic origin and relevant grain size effect of discontinuous grain growth in BaTiO_(3)-based ferroelectric ceramics

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Journal of Materials Science & Technology 2023年第33期164卷 119-128页

作者： Hong Li Bo wu Cong Lin Xiao wu Tengfei Lin Min Gao Hong Tao wenjuan wu Chunlin Zhao College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China Physics Department Southwest Minzu UniversityChengdu 610041China Sichuan Province Key Laboratory of Information Materials and Devices Application Chengdu University of Information TechnologyChengdu 610225China

Barium titanate[BaTiO_(3)(BT)]-based ceramics are typical ferroelectric ***,the discontinuous grain growth(DGG)and relevant grain size effect are deeply *** obvious DGG phenomenon is observed in a paradigmatic Zr^(4+)-doped BT-based ceramic,with grains growing from∼2.2–6.6 to∼121.8–198.4μm discontinuously near 1320℃.It is found that fine grains can get together and grow into large ones with liquid phase surrounding them above eutectic *** the grain boundary density(D g)is quantitatively studied and shows a first-order reciprocal relationship with grain size,and the grain size effect is dependent on D *** grains lead to high D g,and then cause fine domains and pseudocubic-like phase structure because of the interrupted long-range ferroelectric orders by grain *** D g also causes the diffusion phase transition and low Curie dielectric peak due to the distribution of phase transition temperature induced by internal *** domain switching experiments reveal that the polarization orientation is more difficult near the grain boundary,implying that the grain boundary inhibition dominates the process of polarization orientation in fine-grain ceramics,which leads to low polarization but a high coercive ***,large-grain ceramics exhibit easy domain switching and high&similar *** work reveals that the grain boundary effect dominates the grain size effect in fine-grain ceramics,and expands current knowledge on DGG and grain size effect in polycrystalline materials.

关键词： BT-based ferroelectric ceramics Discontinuous grain growth Grain boundary density Grain size effect on structure/property Microscopic origin

Defective Etioplasts Observed in Variegation Mutants May Reveal the Light-Independent Regulation of White/Yellow Sectors of Arabidopsis Leaves

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Journal of Integrative Plant Biology 2011年第11期53卷 846-857页

作者： wenjuan wu Nabil Elsheery Qing Wei Lingang Zhang Jirong Huang National Key Laboratory of Plant Molecular Genetics Institute of Plant-PhysTology and-Ecology Shanghai Institutesfor Biological Sciences the Chinese Academy of Sciences Shanghai 200032 China present address： Division of Nephrology and Hypertension Mayo Clinic Rochester MN 55905 USA Present address： Institute of Plant Science and Resources okayama University Kurashiki Okayama Japan

Leaf variegation resulting from nuclear gene mutations has been used as a model system to elucidate the molecular mechanisms of chloroplast development. Since most variegation genes also function in photosynthesis, it remains unknown whether their roles in photosynthesis and chloroplast development are distinct. Here, using the variegation mutant thylakoid formation1 （thfl） we show that variegation formation is light independent. It was found that slow and uneven chloroplast development in thfl can be attributed to defects in etioplast development in darkness. Ultrastructural analysis showed the coexistence of plastids with or without prolamellar bodies （PLB） in cells of thfl, but not of WT. Although THF1 mutation leads to significant decreases in the levels of Pchlide and Pchliide oxidoreductase （POR） expression, genetic and 5-aminolevulinic acid （ALA）-feeding analysis did not reveal Pchlide or POR to be critical factors for etioplast formation in thfl. Northern blot analysis showed that plastid gene expression is dramatically reduced in thfl compared with that in WT, particularly in the dark. Our results also indicate that chlorophyll biosynthesis and expression of plastidic genes are coordinately suppressed in thfl. Based on these results, we propose a model to explain leaf variegation formation from the plastid development perspective.

关键词： Arabidopsis chloroplast etioplast THF1/Psb29 variegation Pchllide oxidoreductase Pchlide oxidoreductase chloroplastdevelopment.

Predicting community traits along an alpine grassland transect using field imaging spectroscopy

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Journal of Integrative Plant Biology 2023年第12期65卷 2604-2618页

作者： Feng Zhang wenjuan wu Lang Li Xiaodi Liu Guangsheng Zhou Zhenzhu Xu State Key Laboratory of Vegetation and Environmental Change Institute of Botanythe Chinese Academy of SciencesBeijing100093 China China National Botanical Garden Beijing100093 China University of Chinese Academy of Sciences Beijing100049 China Chinese Academy of Meteorological Sciences Beijing100081 China

Assessing plant community traits is important for understanding how terrestrial ecosystems respond and adapt to global climate *** hyperspectral remote sensing is effective for quantitatively estimating vegetation properties in most terrestrial ecosystems,although it remains to be tested in areas with dwarf and sparse vegetation,such as the Tibetan *** measured canopy reflectance in the Tibetan Plateau using a handheld imaging spectrometer and conducted plant community investigations along an alpine grassland *** estimated community structural and functional traits,as well as community function based on a field survey and laboratory analysis using 14 spectral vegetation indices(VIs)derived from hyperspectral *** quantified the contributions of environmental drivers,VIs,and community traits to community function by structural equation modelling(SEM).Univariate linear regression analysis showed that plant community traits are best predicted by the normalized difference vegetation index,enhanced vegetation index,and simple *** equation modelling showed that VIs and community traits positively affected community function,whereas environmental drivers and specific leaf area had the opposite ***,VIs integrated with environmental drivers were indirectly linked to community function by characterizing the variations in community structural and functional *** study demonstrates that community-level spectral reflectance will help scale plant trait information measured at the leaf level to larger-scale ecological *** imaging spectroscopy represents a promising tool to predict the responses of alpine grassland communities to climate change.

关键词： aboveground net primary productivity canopy chlorophyll content canopy leaf nitrogen concentration fractional vegetation cover hyperspectral remote sensing Tibetan Plateau

Arabidopsis PEAPODs function with LIKE HETEROCHROMATIN PROTEIN1 to regulate lateral organ growth

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Journal of Integrative Plant Biology 2020年第6期62卷 812-831页

作者： Ying Zhu Xiao Luo Xuxin Liu wenjuan wu Xiaofeng Cui Yuehui He Jirong Huang National Key Laboratory of Plant Molecular Genetics Shanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghai 200032China National Key Laboratory of Plant Molecular Genetics Shanghai Center for Plant Stress BiologyCAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 201602China Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China Xinjiang Agricultural Vocational Technical College

In higher plants,lateral organs are usually of determinate *** remains largely elusive how the determinate growth is achieved and *** reports have shown that Arabidopsis PEAPOD(PPD)proteins suppress proliferation of dispersed meristematic cells partly through a TOPLESS corepressor ***,we identified a new PPD-interacting partner,LIKE HETEROCHROMATIN PROTEIN1(LHP1),using the yeast two-hybrid system,and their interaction is mediated by the chromo shadow domain and the Jas domain in LHP1 and PPD2,*** genetic data demonstrate that the phenotype of ppd2 lhp1 is more similar to lhp1 than to ppd2,indicating epistasis of lhp1 to *** analysis reveals that PPD2 and LHP1 can regulate expression of a common set of genes directly or ***,chromatin immunoprecipitation results confirm that PPD2 and LHP1 are coenriched at the promoter region of their targets such as D3-TYPE CYCLINS and HIGH MOBILITY GROUP A,which are upregulated in ppd2,lhp1 and ppd2 lhp1 mutants,and that PPDs mediate repressive histone 3 lysine-27 trimethylation at these *** together,our data provide evidence that PPD and LHP1 form a corepressor complex that regulates lateral organ growth.

关键词： Arabidopsis function organs

A mild iodocyclohexane demethylation for highly enhancing antioxidant activity of lignin

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Journal of Bioresources and Bioproducts 2023年第3期8卷 306-317页

作者： Yilin Wang Jin wu Ruihan Shen Yubao Li Guofeng Ma Shuang Qi wenjuan wu Yongcan Jin Bo Jiang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsNanjing Forestry UniversityNanjing 210037China National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials Fuzhou 350108China

Lignin,as a natural antioxidant,shows great potential in food engineering and ***-ever,the inherent macromolecular structure,high polydispersity,and few phenolic hydroxy seri-ously limit its antioxidant *** this work,a mild iodocyclohexane demethylation for highly improving the antioxidant activity of lignin was *** results showed-OCH 3 content exhibited an almost linear decrease as a function of treating time,and the demethylation and cleavage of𝛽-aryl ether bonds prompt an obvious increase in phenolic hydroxyl content(4.01 mmol/g)and a significant decline in aliphatic hydroxyl(∼0.03 mmol/g).Meanwhile,attributing to the fragmentation of𝛽β-O-4,β-β,and𝛽β-5 substructures,the polydispersity of lignin molecular weight decreases from 2.7 to *** a result,the formed catechol-typed lignin showed an out-standing antioxidant activity,with the radical(DPPH·)scavenging index(inverse of concentration for 50%of maximal effect(EC 50)value)over 2000 mL/mg,much superior to the commercial antioxidants(<500 mL/mg).Further structure-activity relationship analysis implied that the Ph-OH/-OCH 3 ratio might act as a key factor influencing the antioxidant activity of *** mild demethylation demonstrates a facile and effective method for highly enhancing the antioxidant activity of lignin and makes the catechol-typed lignin a green and promising product for practical use in food,medicine,and pharmacy.

关键词： Lignin Iodocyclohexane Mild demethylation Antioxidant activity Structure-activity relationship

Manipulating Zr/Ti ratio based on phase diagram for large electrocaloric effects with multiple target operation temperatures in PLZT ceramics

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Journal of Advanced Ceramics 2024年第9期13卷 1422-1431页

作者： Junjie Li Ruowei Yin Zhe Xiong Yizheng Bao Xing Zhang wenjuan wu Lezhong Li Yang Bai Sichuan Province Key Laboratory of Information Materials and Devices Application College of Optoelectronic Engineeringand Chengdu IC Valley Industrial CollegeChengdu University of Information TechnologyChengdu 610225China Beijing Advanced Innovation Center for Materials Genome Engineering and Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Chengdu Hongming Electronics Co. Ltd.Chengdu 610199China Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201800China Sichuan Meteorological Optoelectronic Sensor Technology and Application Engineering Research Center Chengdu University of Information TechnologyChengdu 610225China

Ferroelectric phase transition has been identified as a promising avenue for designing high-performanceelectrocaloric materials for zero-emission and solid-state refrigeration. However, extensive research has been limited todeveloping ferroelectric materials with large electrocaloric effects near room temperature, preventing them from meetingdiverse refrigeration requirements. In this study, by leveraging the room-temperature phase diagram of the (PbLa)(ZrTi)O_(3)solution, we prepared a series of Pb_(0.775)La_(0.15)Zr_(x)Ti_(1−x)O_(3) bulk ceramics spanning the ferroelectric and relaxor ferroelectricphase regions. This enabled the attainment of various phase transition features and temperatures. Finally, largeelectrocaloric effects, coupled with adjustable operation temperatures ranging from 150 to −45℃, are successfullyachieved through manipulation of the Zr/Ti ratio. This comprehensive range of operation temperatures effectively addressesdiverse refrigeration application requirements, ranging from industrial equipment to freezer cabinets. This work not onlyunderscores the expansion of the electrocaloric refrigeration application domain but also proposes a material designstrategy tailored to meet these evolving demands.

关键词： electrocaloric effect phase transition phase diagram ferroelectric ceramics

Technical development and long-term performance observations of long-life asphalt pavement: A case study of Shandong Province

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Journal of Road Engineering 2022年第4期2卷 369-389页

作者： Lin Wang Jincheng Wei wenjuan wu Xiaomeng Zhang Xizhong Xu Xiangpeng Yan Shandong Transportation Institute Jinan 250102China Key Laboratory of Expressway Maintenance Technology Ministry of Transport Jinan 250102China

Based on the investigation of long-life asphalt pavement at home and abroad,the development of long-life asphalt pavement technology in Shandong Province,China is reviewed in this *** structural combination char-acteristics of typical long-life asphalt pavement in Shandong Province and their popularization and application are *** application effect of combined base long-life asphalt pavement,which has been widely promoted,is *** the same time,taking the Binda perpetual pavement test road in Shandong Province as an example,the dynamic response and long-term performance evolution of long-life asphalt pavement are analyzed over a period of more than 17 *** S1,S2,and S3 present information about full-depth asphalt *** S4 describes combined base asphalt *** results show that the maximum strain of S1–S4 is within the endurance strain limit.S1,S2,S3 and S4 are all expected to be long-life asphalt *** the current study,Sections S1–S4 were maintained in good condition during a service period of more than 17 years with no structural cracks and good deflection,rutting,and IRI *** deflection index was stable without growth,and the IRI was also relatively stable following the opening to *** rutting depth un-derwent a slight cumulative increase within 8 years of opening,and then *** average rutting depth over the 17-year period was less than 15 ***,S1–S4 meet the design standards required for use as long-life *** the perspectives of resource saving,energy saving,and emission reduction and service performance,full-depth asphalt pavement can be considered to represent a new generation of green and durable pavement structures with great future promotion potential.

关键词： Long-life asphalt pavement Dynamic response Strain Deflection Long-term performance