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| 1 | High phosphate removal using La(OH)3 loaded chitosan based composites and mechanistic study显示文摘Our present study was to prepare a biomass-supported adsorbents with high adsorptive capacity and high selectivity to prevent the accelerated eutrophication in water body.To this end,different metal hydroxide(La,Zr and Fe)first was successfully loaded on chitosan microspheres.Then the quaternary ammonium group with different content was introduced into the adsorbent by polymerization.By comparison of adsorption properties,chitosanLa(OH)3-quaternary ammonium-20%(CS-La-N-20%)has strong adsorption to phosphate(160 mg/g)by immobilizing nano-sized La(OH)3 within a quaternary-aminated chitosan and it maintain high adsorption in the presence of salt ions.The pH results indicated that the CS-La-N-20%would effectively sequestrate phosphate over a wide pH range between 3 and 7 without significant La3+leaching.What’s more,adsorption capacity on the introduce of positively charged quanternary-aminated groups was significantly higher than that of the unmodified adsorbents at alkaline conditions.The column adsorption capacity reached 1300 bed volumes(BV)when phosphate concentration decreased until 0.5 mg/L at 6 BV/hr.The column adsorption/desorption reveals that no significant capacity loss is observed,indicating excellent stability and repeated use property.Characterizations revealed that phosphate adsorption on CS-La-N-20%through ligand exchange(impregnated nano-La(OH)3)and electrostatic attraction(positively charged quanternary-aminated groups).All the results suggested that CS-La-N-20%can serve as a promising adsorbent for preferable phosphate removal in realistic application. | Shaopeng Zhang Yi Zhang Jie Ding Zepeng Zhang Chao Gao Muslim Halimi Hary Demey Zhen Yang Weiben Yang | 2021 | Journal of Environmental Sciences2021，33，8： | 3 |
| 2 | Transcriptomics and metabolomics analyses provide insights into postharvest ripening and senescence of tomato fruit under low temperature显示文摘Tomato is one of the most important vegetable crops in the world and is a model plant used to study the ripening of climacteric fleshy fruit.During the ripening process of tomato fruit,flavor and aroma metabolites,color,texture and plant hormones undergo significant changes.However,low temperatures delayed the ripening process of tomato fruit,inhibiting flavor compounds and ethylene production.Metabolomics and transcriptomics analyses of tomato fruit stored under low temperature(LT,5°C)and room temperature(RT,25°C)were carried out to investigate the effects of storage temperature on the physiological changes in tomato fruit after harvest.The results of transcriptomics changes revealed that the differentially expressed genes(DEGs)involved in tomato fruit ripening,including several kinds of transcription factors(TFs)(TCP,WRKY,MYB and bZIP),enzymes involved in cell wall metabolism[beta-galactosidase(β-GAL),pectinesterase(PE)and pectate lyase(PL),cellulose and cellulose synthase(CESA)],enzymes associated with fruit flavor and aroma[acetyltransferase(AT),malic enzyme(ME),lipoxygenase(LOX),aldehyde dehydrogenase(ALDH),alcohol dehydrogenase(ADH)and hexokinase(HK)],genes associated with heat stress protein 70 and genes involved in the production of plant hormones such as Ethylene responsive factor 1(ERF1),Auxin/indoleacetic acids protein(AUX/IAA),gibberellin regulated protein.Based on the above results,we constructed a regulatory network model of the effects of different temperatures during the fruit ripening process.According to the analysis of the metabolomics results,it was found that the contents of many metabolites in tomato fruit were greatly affected by storage temperature,including,organic acids(L-tartaric acid,a-hydroxyisobutyric acid and 4-acetamidobutyric acid),sugars(melezitose,beta-Dlactose,D-sedoheptulose 7-phosphate,2-deoxyribose 1-phosphate and raffinose)and phenols(coniferin,curcumin and feruloylputrescine).This study revealed the effects of storage temperature on postharvest tomato fruit and provided a basis for further understanding of the molecular biology and biochemistry of fruit ripening. | Chunmei Bai Caie Wu Lili Ma Anzhen Fu Yanyan Zheng Jiawei Han Changbao Li Shuzhi Yuan Shufang Zheng Lipu Gao Xinhua Zhang Qing Wang Demei Meng Jinhua Zuo | 2023 | Horticultural Plant Journal2023，9，1： | 3 |
| 3 | Characterization of macrolide resistance in Mycoplasma pneumoniae isolated from children in Shanghai, China显示文摘 | Yang Liu Xinyu Ye Hong Zhang Xiaogang Xu Wanhua Li Demei Zhu Minggui Wang | 2010 | Diagnostic Microbiology & Infectious Disease2010，，4： | 2 |
| 4 | Preparafion of poly (styrene-glucidylmethacrylate)/Fe3O4 composite microspheres with high magnetite contents 显示文摘 | Jing Zhang Demei Yu Wei Chen | 2009 | Journal of Magnetism and Mag netic Materials2009，321，： | 1 |
| 5 | Preparation of poly (styrene-glucidyl methacrylate)/Fe3O4 composite microspheres with high magnetite contents 显示文摘 | ZHANG Jing YU Demei CHEN Wei | 2009 | J Magn Magn Mater2009，321，： | 1 |
| 6 | Construction of highly antiaromatic boroles显示文摘Boroles are five-membered,unsaturated heterocycles with an antiaromatic 4π-electron BC_4 ring.According to Breslow's exten sion of the H(u|¨)ckel rule,the intrinsic antiaromaticity can be attrib uted to the unfavorableπ-electron delocalization of the BC_4 core,in which a vacant p-orbital on boron mediates the conjugation of four ringπ-electrons.The first borole derivative,1,2,3,4,5-pentaphenylborole[PhBC_4Ph_4],was isolated by Eisch and Hota[1]in 1969,but its crystal structure has been determined by X-ray crystallography recently[2].Since the structure of borole was confirmed。 | Weidong Zhang Bingjie Zhang Demei Yu Gang He | 2017 | Science Bulletin2017，62，13： | 0 |
| 7 | Dual functions of PsmiR172b-PsTOE3 module in dormancy release and flowering in tree peony (Paeonia suffruticosa)显示文摘MicroRNAs(miRNAs)are non-coding RNAs that interact with target genes and are involved in many physiological processes in plants.miR172-AP2 mainly plays a role in the regulation of f lowering time and floral organ differentiation.Bud dormancy release is necessary for forcing culture of tree peony in winter,but the mechanism of dormancy regulation is unclear.In this study,we found that a miR172 family member,PsmiR172b,was downregulated during chilling-induced bud dormancy release in tree peony,exhibiting a trend opposite to that of PsTOE3.RNA ligase-mediated(RLM)5-RACE(rapid amplification of cDNA ends)confirmed that miR172b targeted PsTOE3,and the cleavage site was between bases 12(T)and 13(C)within the complementary site to miR172b.The functions of miR172b and PsTOE3 were detected by virus-induced gene silencing(VIGS)and their overexpression in tree peony buds.PsmiR172b negatively regulated bud dormancy release,but PsTOE3 promoted bud dormancy release,and the genes associated with bud dormancy release,including PsEBB1,PsEBB3,PsCYCD,and PsBG6,were upregulated.Further analysis indicated that PsTOE3 directly regulated PsEBB1 by binding to its promoter,and the specific binding site was a C-repeat(ACCGAC).Ectopic expression in Arabidopsis revealed that the PsmiR172b-PsTOE3 module displayed conservative function in regulating f lowering.In conclusion,our results provided a novel insight into the functions of PsmiR172-PsTOE3 and possible molecular mechanism underlying bud dormancy release in tree peony. | Yuxi Zhang Linqiang Gao Yanyan Wang Demei Niu Yanchao Yuan Chunying Liu Xinmei Zhan Shupeng Gai | 2023 | Horticulture Research2023，10，4： | 0 |
| 8 | PsRGL1 negatively regulates chilling- and gibberellin-induced dormancy release by PsF-box1-mediated targeting for proteolytic degradation in tree peony显示文摘Tree peony bud endodormancy is a common survival strategy similar to many perennial woody plants in winter,and the activation of the GA signaling pathway is the key to breaking endodormancy.GA signal transduction is involved in many physiological processes.Although the GA-GID1-DELLA regulatory module is conserved in many plants,it has a set of specific components that add complexity to the GA response mechanism.DELLA proteins are key switches in GA signaling.Therefore,there is an urgent need to identify the key DELLA proteins involved in tree peony bud dormancy release.In this study,the prolonged chilling increased the content of endogenously active gibberellins.PsRGL1 among three DELLA proteins was significantly downregulated during chilling-and exogenous GA3-induced bud dormancy release by cell-free degradation assay,and a high level of polyubiquitination was detected.Silencing PsRGL1 accelerated bud dormancy release by increasing the expression of the genes associated with dormancy release,including PsCYCD,PsEBB1,PsEBB3,PsBG6,and PsBG9.Three F-box protein family members responded to chilling and GA3 treatments,resulting in PsF-box1 induction.Yeast two-hybrid and BiFC assays indicated that only PsF-box1 could bind to PsRGL1,and the binding site was in the C-terminal domain.PsF-box1 overexpression promoted dormancy release and upregulated the expression of the dormancy-related genes.In addition,yeast two-hybrid and pull-down assays showed that PsF-box1 also interacted with PsSKP1 to form an E3 ubiquitin ligase.These findings enriched the molecular mechanism of the GA signaling pathway during dormancy release,and enhanced the understanding of tree peony bud endodormancy. | Linqiang Gao Demei Niu Tianyu Chi Yanchao Yuan Chunying Liu Shupeng Gai Yuxi Zhang | 2023 | Horticulture Research2023，10，5： | 0 |
| 9 | Synthesis of Coumarin-Pillar[5]arene as a Selective Fluorescent Probe for Methyl-Parathion显示文摘A novel coumarin-pillar[5]arene derivative(P5C10)was prepared.Fluorescence spectroscopy indicates that P5C10 shows good selectivity towards methyl-parathion.A combination of NMR spectra,MALDI-TOF spectra and computational calculations reveals the formation of a host-guest complex driven byπ-πstacking interactions. | Fan Zhang Xianliang Cao Demei Tian Haibing Li | 2015 | Chinese Journal of Chemistry2015，33，3： | 0 |
| 10 | Spatiotemporal dynamics and geo-environmental factors influencing mangrove gross primary productivity during 2000–2020 in Gaoqiao Mangrove Reserve, China显示文摘Background:Mangrove forests are a significant contributor to the global carbon cycle,and the accurate estimation of their gross primary productivity(GPP)is essential for understanding the carbon budget within blue carbon ecosystems.Little attention has been given to the investigation of spatiotemporal patterns and ecological variations within mangrove ecosystems,as well as the quantitative analysis of the influence of geo-environmental factors on time-series estimations of mangrove GPP.Methods:This study explored the spatiotemporal dynamics of mangrove GPP from 2000 to 2020 in Gaoqiao Mangrove Reserve,China.A leaf area index(LAI)-based light-use efficiency(LUE)model was combined with Landsat data on Google Earth Engine(GEE)to reveal the variations in mangrove GPP using the Mann-Kendall(MK)test and Theil-Sen median trend.Moreover,the spatiotemporal patterns and ecological variations in mangrove ecosystems across regions were explored using four landscape indicators.Furthermore,the effects of six geo-environmental factors(species distribution,offshore distance,elevation,slope,planar curvature and profile curvature)on GPP were investigated using Geodetector and multi-scale geo-weighted regression(MGWR).Results:The results showed that the mangrove forest in the study area experienced an area loss from 766.26 ha in 2000 to 718.29 ha in 2020,mainly due to the conversion to farming,terrestrial forest and aquaculture zones.Landscape patterns indicated high levels of vegetation aggregation near water bodies and aquaculture zones,and low levels of aggregation but high species diversity and distribution density near building zone.The mean value of mangrove GPP continuously increased from 6.35 g C⋅m^(-2)⋅d^(-1) in 2000 to 8.33 g C⋅m^(-2)⋅d^(-1) in 2020,with 23.21%of areas showing a highly and significantly increasing trend(trend value>0.50).The Geodetector and MGWR analyses showed that species distribution,offshore distance and elevation contributed most to the GPP variations.Conclusions:These results provide guidelines for selecting GPP products,and the combination of Geodetector and MGWR based on multiple geo-environmental factors could quantitatively capture the mode,direction,pathway and intensity of the influencing factors on mangrove GPP variation.The findings provide a foundation for understanding the spatiotemporal dynamics of mangrove GPP at the landscape or regional scale. | Demei Zhao Yinghui Zhang Junjie Wang Jianing Zhen Zhen Shen Kunlun Xiang Haoli Xiang Yongquan Wang Guofeng Wu | 2023 | Forest Ecosystems2023，10，5： | 0 |
| 11 | In situ localization of BiVO_(4) onto two-dimensional MXene promoting photoelectrochemical nitrogen reduction to ammonia显示文摘The existing industrial ammonia synthesis usually adopts the Haber-Bosch process,which requires harsh conditions of high temperature and high pressure,and consumes high energy.Under this circumstance,photoelectrochemical(PEC)catalysis is regarded as a promising method for N_(2) reduction reaction(NRR),but bears problems of low efficiency and yield.Thus,exploring active catalysts remains highly desirable.In this work,BiVO_(4)@MXene hybrids have been facilely synthesized by a hydrothermal route.The heterojunctions by the in situ growth of BiVO_(4) onto two-dimensional(2D)MXene greatly increase the NRR efficiency:under photoelectric conditions,the optimized NH_(3) yield is 27.25µg h^(-1) cm^(-2),and the Faraday efficiency achieves 17.54% at−0.8 V relative to the reversible hydrogen electrode(RHE),which are higher than most state-of-the-art NRR(photo)electrocatalysts.The mechanism speculation shows the enhanced light absorption range and the heterojunction formation largely promote the separation and the transfer efficiency of photogenerated carriers,thereby improving the PEC catalytic ability.Therefore,this work provides a hybrid route to combine the advantages of photo and electric catalysis for effective artificial nitrogen fixation. | Demei Zhang Shiyu Yang Xiaoyu Fang Huifeng Li Xuebo Chen Dongpeng Yan | 2022 | Chinese Chemical Letters2022，33，10： | 0 |
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