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| 1 | Polymer nanoparticles with dendrimer-Ag shell and its application in catalysis显示文摘Polymer nanoparticles with dendrimer-Ag shell were prepared and their application in catalytic reduction of 4-nitrophenol(4-NP) was investigated.Cross-linked polystyrene(PS) microspheres were prepared through dispersion copolymerization of styrene,acrylic acid and crosslinking monomer 1,2-divinylbenzene.PS microspheres with average size of 450 nm and narrow size distribution were used as support for the immobilization of dendrimer-Ag shell.The polyamidoamine(PAMAM) dendrimer shell was successively grafted onto the surface of PS microspheres through repetitive Michael addition reaction of methyl acrylate(MA) and amidation of the obtained esters with large excess of ethylenediamine(EDA).Silver nanoparticles were formed directly inside the PAMAM shell through reduction with NaBH_4.The resulting PS@PAMAM-Ag nanoparticles were packed in a stainless steel column and used successfully for catalytic reduction of 4-NP.This technique for packing catalytic polymer particles in a column could improve the efficiency of using the metal catalyst and the tedious separation in catalytic reaction. | Gaofei Dang Yan Shi Zhifeng Fu Wantai Yang | 2013 | Particuology2013，11，3： | 2 |
| 2 | The genomic and bulked segregant analysis of Curcuma alismatifolia revealed its diverse bract pigmentation显示文摘Compared with most flowers where the showy part comprises specialized leaves(petals)directly subtending the reproductive structures,most Zingiberaceae species produce showy“flowers”through modifications of leaves(bracts)subtending the true flowers throughout an inflorescence.Curcuma alismatifolia,belonging to the Zingiberaceae family,a plant species originating from Southeast Asia,has become increasingly popular in the flower market worldwide because of its varied and esthetically pleasing bracts produced in different cultivars.Here,we present the chromosome-scale genome assembly of C.alismatifolia“Chiang Mai Pink”and explore the underlying mechanisms of bract pigmentation.Comparative genomic analysis revealed C.alismatifolia contains a residual signal of whole-genome duplication.Duplicated genes,including pigment-related genes,exhibit functional and structural differentiation resulting in diverse bract colors among C.alismatifolia cultivars.In addition,we identified the key genes that produce different colored bracts in C.alismatifolia,such as F3′5'H,DFR,ANS and several transcription factors for anthocyanin synthesis,as well as chlH and CAO in the chlorophyll synthesis pathway by conducting transcriptomic analysis,bulked segregant analysis using both DNA and RNA data,and population genomic analysis.This work provides data for understanding the mechanism of bract pigmentation and will accelerate breeding in developing novel cultivars with richly colored bracts in C.alismatifolia and related species.It is also important to understand the variation in the evolution of the Zingiberaceae family. | Xuezhu Liao Yuanjun Ye Xiaoni Zhang Dan Peng Mengmeng Hou Gaofei Fu Jianjun Tan Jianli Zhao Rihong Jiang Yechun Xu Jinmei Liu Jinliang Yang Wusheng Liu Luke RTembrock Genfa Zhu Zhiqiang Wu | 2022 | aBIOTECH2022，3，3： | 1 |
| 3 | RIN enhances plant disease resistance via root exudate-mediated assembly of diseasesuppressive rhizosphere microbiota显示文摘The RIPENING-INHIBITOR(RIN)transcriptional factor is a key regulator governing fruit ripening.While RIN also affects other physiological processes,its potential roles in triggering interactions with the rhizosphere microbiome and plant health are unknown.Here we show that RIN affects microbiome-mediated disease resistance via root exudation,leading to recruitment of microbiota that suppress the soil-borne,phytopathogenic Ralstonia solanacearum bacterium.Compared with the wild-type(WT)plant,RIN mutants had different root exudate profiles,which were associated with distinct changes in microbiome composition and diversity.Specifically,the relative abundances of antibiosis-associated genes and pathogensuppressing Actinobacteria(Streptomyces)were clearly lower in the rhizosphere of rin mutants.The composition,diversity,and suppressiveness of rin plant microbiomes could be restored by the application of 3-hydroxyflavone and riboflavin,which were exuded in much lower concentrations by the rin mutant.Interestingly,RIN-mediated effects on root exudates,Actinobacteria,and disease suppression were evident from the seedling stage,indicating that RIN plays a dual role in the early assembly of diseasesuppressive microbiota and late fruit development.Collectively,our work suggests that,while plant disease resistance is a complex trait driven by interactions between the plant,rhizosphere microbiome,and the pathogen,it can be indirectly manipulated using'prebiotic'compounds that promote the recruitment of disease-suppressive microbiota. | Keming Yang Ruixin Fu Haichao Feng Gaofei Jiang Omri Finkel Tianyu Sun Mingchun Liu Baowen Huang Shan Li Xiaofang Wang Tianjie Yang Yikui Wang Shimei Wang Yangchun Xu Qirong Shen Ville-Petri Friman Alexandre Jousset Zhong Wei | 2023 | Molecular Plant2023，16，9： | 0 |
| 4 | Causes of progressive stamping die damage and retooling measures to reduce carbide punch fracture显示文摘We investigated the reasons for frequently appearing early failure of carbide punches in a progressive stamping die when they were used to produce magnetic shielding steel parts.The failure modes of the carbide punches were statistically classified.Edge chipping and shoulder fracturing were the two types of failure modes that were found.The composition,hardness,and microstructure of the punches were analyzed.The cobalt content was found to be too low to ensure sufficient toughness.The brittle phase of tungsten carbide(WC) was prone to breaking off during the shear cutting process,and resulted in edge chipping.In addition,the material chips were easily bonded to the punch edge when there was a lack of press oil lubricity.It resulted in an uneven blanking clearance,which caused a lateral force and finally resulted in shoulder fracturing of the punches.Improvement measures were introduced to address the abovementioned issues.By using the carbide punches with greater toughness and shear cutting oil with high lubricity,the early damage problems of the punches are effectively solved,which ensures normal production of the magnetic shielding steel parts. | LIANG Gaofei YAN Yuanyuan LUO Xiaoliang LIN Changqing FU Yan'an SHAO Zongqiang | 2016 | Baosteel Technical Research2016，10，4： | 0 |
| 5 | Secondary work embrittlement of cold-rolled 05CuPCrNi sheet at low temperature显示文摘Due to the rapid development of China's rail transportation equipment manufacturing industry and related international distribution,important material suppliers such as Baoshan Iron & Steel Co.,Ltd.carries on investigating the stability of material under extremely cold conditions.In this study,mechanical properties and secondary work embrittlement of weathering steel 05 CuPCrNi were tested at low temperature.Compared to the mechanical properties at room temperature,the yield and tensile strength increase slightly with decreasing temperature.However,the variation of elongation is not obvious.The experimental results also show that the secondary work embrittlement transition temperature of 05 CuPCrNi is lower than-60 ℃.These results provide the basis for the use of this train body material in extremely cold regions. | ZHANG Guoxiang LIANG Gaofei FU Yan'an LI Yongcan WANG Xunhong | 2016 | Baosteel Technical Research2016，10，4： | 0 |
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