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cO oxidation under lean and stoichiometric conditions over ceriazirconia with very low metal contents(cu,co,Ag and pt)

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journal of Rare Earths 2024年第9期42卷 1669-1681,I0002页

作者： j.c.Martínez-Munuera M.p.Yeste A.García-García McMA Group Department of Inorganic Chemistry and Institute of MaterialsUniversity of AlicanteCarretera de San Vicente del Raspeig s/n03690San Vicente del RaspeigAlicanteSpain Solid chemistry and catalysis Group Department of Materials ScienceMetallurgic Engineering and Inorganic ChemistryInstitute of Electronic Microscopy and Materials ResearchUniversity of CádizAp.40E-11510Puerto RealCádizSpain

In this work,several ceria-zirconia based catalysts with very lo w(and equimolar) metal contents were prepared,characterised and tested for the cO oxidatio n reaction(under lean and stoichiometric conditions),trying to emulate those conditions found in a diesel oxidation catalyst(DOc) system from a diesel engine and those encountered under gasoline exhaust(λ=1).The metals chosen are cu,co,Ag and pt(as a reliable benchmark).The results reveal enormous differences among reducibility and catalytic activity despite quite similar structural and textural properties of the catalysts,showing differences among dispersion(Ag-catalyst seems to present a low level of dispersion).This catalyst seems to be characterised,as well,by a strong electronic interaction between ce and Ag centres which is suggested to yield an improved reducibility under H_(2)-TpR ***,the order in catalytic activity(cu>Ag>co≈pt>>support) seems not to follow the order found in reducibility and the cu-catalyst seems to be the most active independently on the reaction conditions,yielding nearly overlapped cO oxidation catalytic *** restingly,a stro ng correlation between the catalytic activity under the two conditions tested and the OSc values of the ce_(0.8)Zr_(0.2)O_(2)-supported metal catalysts is ***,OSc parameter measured at 150℃ can be used as a relevant descriptor to evaluate the cO oxidation activity at low and medium conversions for the investigated catalysts,much better than the H_(2)-TpR measurements.

关键词： cO oxidation Low metal content ceria-zirconia copper species OSc parameter Rare earths

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Drought events influence nutrient canopy exchanges and green leaf partitioning during senescence in a deciduous forest

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Forest Ecosystems 2024年第1期11卷 110-119页

作者： j.Touche c.calvaruso p.De Donato M.-p.Turpault INRAE BEFF-54000NancyFrance UMR 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events expected in the coming decades in Western Europe may disturb forest biogeochemical cycles and create nutrient deficiencies in *** possible origin of nutrient deficiency is the disturbance of the partitioning of the green leaf pool during the leaf senescence period between resorption,foliar leaching and senesced ***,the effects of drought events on this partitioning and the consequences for the maintenance of tree nutrition are poorly *** experiment in a beech forest in Meuse(France)was conducted to assess the effect of drought events on nutrient canopy exchanges and on the partitioning of the green leaf pool during the leaf senescence *** aim was to identify potential nutritional consequences of droughts for *** nutrient dynamics,including resorption,chemistry of green and senesced leaves,foliar absorption and leaching in mature beech stands from 2012 to 2019 allowed us to compare the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by almost a third of the potassium(K)partitioning to resorption(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity expected for the coming decades,there will be a risk of potassium deficiency in trees,as already observed in a rainfall exclusion experiment on the same study *** foliar leaching and higher parititioning to the senesced leaves for K and phosphorus(p)were also *** addition,a slight increase in nitrogen(N)resorption efficiency occurred during dry years which is more likely to improve tree *** calcium(ca)negative resorption decreased,with no apparent consequence in our study *** results show that nutrient exchanges in the canopy and the partitioning of the green leaf

关键词： Natural drought Beech forest canopy Resorption Foliar leaching Senesced leaves Nutrition

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Laser-induced graphene-coated wearable smart textile electrodes for biopotentials signal monitoring

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Frontiers of Materials Science 2024年第1期18卷 95-111页

作者： c.M.Vidhya Yogita Maithani Sakshi Kapoor j.p.Singh Department of physics Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

This paper describes how to produce a wearable dry electrode at a reasonable cost and how to use it for the monitoring of biopotentials in *** textiles in wearable technologies have made a great advancement in the health care management and living standards of *** was manufactured using the low-cost single-step process,laser ablation of polyimide,a commercial *** dispersions were made using solvent isopropyl alcohol which has low boiling point,nontoxicity,and environmental *** successive coating of the graphene dispersion on the cotton fabric to make it conductive,the sheet resistance of the resulting fabric dropped to 3% of its initial *** laser-induced graphene(LIG)cotton dry electrodes thus manufactured are comparable to Ag/Agcl wet electrodes in terms of the skin-to-electrode impedance,measuring between 78.0 and 7.2 kΩ for the frequency between 40 Hz and 1 *** LIG cotton electrode displayed a signal-to-noise ratio of 20.17 *** to its comfort,simplicity,and good performance over a longer period of time,the textile electrode appears suited for medical applications.

关键词： biopotential electrocardiogram electromyogram flexible electrode textile porous graphene

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consumer transparency in the production chain for plant varieties produced using new genomic techniques

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aBIOTEcH 2024年第2期5卷 239-246页

作者： j.M.Lukasiewicz c.c.M.van de Wiel L.A.p.Lotz M.j.M.Smulders Wageningen University&Research P.O.Box 386NL-6700 AJ WageningenThe Netherlands

plants edited with new genomic techniques(NGTs)currently fall under the Genetically Modified Organisms Directive(2001/18/Ec)in the European *** the proposal of the European commission,NGT plants are partially exempted from the regulations of this *** proposal makes a distinction between two categories of NGT plants:NGT-1 and ***-1 category plants are considered equal to plants obtained through conventional breeding *** plants will not be labelled for the consumer,although they will be labelled as ***-2 category plants may be labelled with additional information as a positive *** of seeds of varieties made with gene editing,but not the products,would mean that most steps in the production chain are transparent,but not the last step towards ***“right to know”and increasing knowledge of gene-edited food is a common theme in food labelling towards ***,we describe current labelling regimes and registers and how these may be applied to provide transparency on gene-edited products to ***,we also look into consumer studies,which indicate a greater acceptance of gene-edited food among consumers,especially when additional benefits such as sustainability are mentioned.

关键词： Labelling New genomic techniques consumer transparency plant products

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Interface catalytic reduction of alumina by nickle for the aluminum nanowire growth: Dynamics observed by in situ TEM

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Nano Research 2024年第3期17卷 1225-1231页

作者： Zichun Wang Dan Wang ang Li Lizhuo Wang Xiaodong Han Yijiao jiang jianfeng chen jun Huang Beijing Advanced Innovation center for Soft Matter Science and Engineering State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China Laboratory for catalysis Engineering School of Chemical and Biomolecular EngineeringThe University of SydneyNew South Wales 2006Australia Beijing Key Laboratory of Microstructure and property of Advanced Materials Beijing University of TechnologyBeijing 100024China Department of Engineering Macquarie UniversitySydneyNew South Wales 2109Australia

Metal nanowires show promise in a broad range of applications and can be fabricated via a number of methods,such as vapor–liquid–solid process and template-based ***,the synthesis of Al nanowires(NWs)is still challenging from the stable alumina *** this work,the Ni-catalyzed fabrication of Al NWs has been realized using various Al_(2)O_(3) *** growth dynamics of Al NWs on Ni/Al_(2)O_(3) was studied using in situ transmission electron microscopy(TEM).The effect of alumina structures,compositions,and growth temperature were *** growth of Al NWs correlates with the Na addition to the alumina *** no eutectic mixture of nickel aluminide was formed,a mechanism of Ni-catalyzed reduction of Al_(2)O_(3) for Al NWs growth has been proposed instead of the vapor–liquid–solid *** key insights reported here are not restricted to Ni-catalyzed Al NWs growth but can be extended to understanding the dynamic change and catalytic performance of Ni/Al_(2)O_(3) under working conditions.

关键词： in situ transmission electron microscopy(TEM) Al nanowires alumina reduction nanowire growth

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D-psicose intake exacerbates dextran sulfate sodium-induced colitis in mice through alteration in the gut microbiota and dysfunction of mucosal barrier

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Food Science and Human Wellness 2024年第1期13卷 173-182页

作者： Xuejiao Zhang ang Li Yuanyifei Wang jin Wang Bowei Zhang Yan Zhang jingmin Liu Shuo Wang Tianjin Key Laboratory of Food Science and Health School of MedicineNankai UniversityTianjin 300072China college of Food Science and Technology Hebei Agricultural UniversityBaoding 071001China

D-psicose,as a low-calorie rare sugar,has attracted a lot of attention in recent years for alternating to *** anti-obesity effect of D-psicose has been extensively confirmed in previous studies,however,the impact of D-psicose on colitis remains ***,we firstly evaluated the effect of the D-psicose prophylactic intervention on dextran sulfate sodium-induced colitis in c57BL/6 *** pathological symptoms,inflammatory cytokines levels,gut microbiota composition,short chain fatty acids(ScFAs)production and colonic barrier integrity were comprehensively *** results confirmed that D-psicose intervention aggravated colitis,characterized by the exacerbation of colon shortening,increase of colonic inflammatory infiltration,and marked exaltation of disease activity indices and IL-6,IL-1βand TNF-α***,the dysfunction of gut microbiota was identified in the psicose *** abundance of pro-inflammatory bacteria Lachnospiraceae_NK4A136_group was significantly up-regulated while the abundance of probiotics Akkermansia and Lactobacillus were significantly down-regulated in the psicose group compared to the model ***,the production of ScFAs was suppressed in the psicose group,accompanied by a decrease in the level of mucin 2(Muc-2).collectively,the underlying mechanism of the exacerbation of colitis by D-psicose intervention might be attributed to microbiota dysfunction accompanied by the reduction of ScFAs,which leads to the damage of the mucosal barrier and the intensifi cation of inflammatory invasion.

关键词： D-psicose colitis Gut microbiota Short chain fatty acids Mucin 2

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A new class of crystalline X-ray induced photochromic materials assembled from anion-directed folding of a flexible cation

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chinese chemical Letters 2024年第8期35卷 554-557页

作者： Hong-jin Liao Zhu Zhuo Qing Li Yoshihito Shiota jonathan p.Hill Katsuhiko Ariga Zi-Xiu Lu Lu-Yao Liu Zi-ang Nan Wei Wang You-Gui Huang cAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China college of chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China Xiamen Key Laboratory of Rare Earth photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of china Fuzhou 350108China Institute for Materials chemistry and Engineering Kyushu UniversityFukuoka 819-0395Japan World premier International(WpI)center for Materials Nanoarchitectonics(MANA) National Institute for Materials Science(NIMS)Ibaraki 305-0044Japan

Electron-deficient viologens are widely used as ligands or structure-directing agents(SDAs)to synthesize crystalline X-ray induced photochromic ***,a new rational strategy of anion-directed fold-ing a flexible cation(H_(2)imb)^(2+)((H_(2)imb)^(2+)=di-protonated 2,3-bis(imidazolin-2-yl)-2,3-dimethylbutane)has been ***-donating cl−and(Zncl4)2−are used to direct folding a flexible electron-deficient(H_(2)imb)^(2+)*** complexes(H_(2)imb)(NO_(3))2(1),(H_(2)imb)cl2·H_(2)O(2),and(H_(2)imb)Zncl4(3)have been synthesized in which(H_(2)imb)^(2+)crystallize in an anti-conformation,88.8°-gauche,and 51.8°-gauche,*** contrary to X-ray silent complex 1,X-ray induced photochromism has been achieved in both complex 2 and *** intermolecular charge-transfer mechanism has been elucidated and the anion directed folding of(H_(2)imb)^(2+)has been validated to be critical to yield colored long-lived charge-separated states.

关键词： Supramolecular photochromic X-ray induced Anion-directed folding Electron-deficient viologens

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Design and fabrication of self-suspending aluminum-plastic/semiconductor photocatalyst devices for solar energy conversion

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journal of Environmental Sciences 2024年第2期136卷 615-625页

作者： Zhi-ang Zhao jingyun Mao chengjing Lu Shuangqiao Yang Qingrong Qian Qinghua chen Hun Xue Xiaoli Sun Min-Quan Yang college of Environmental and Resource Sciences College of Carbon Neutral Modern IndustryFujian Key Laboratory of Pollution Control and Resource ReuseFujian Normal UniversityFuzhou 350007China State Key Laboratory of polymer Materials Engineering Polymer Research Institute of Sichuan UniversityChengdu 610065China

The design and synthesis of self-suspending photocatalyst device with easy recyclability is important for practical ***,this work utilizes aluminum-plastic package waste as raw material to prepare an aluminum-plastic supported TiO_(2)(Ap-TiO_(2))photocatalyst device through 3D printing design and surface deposition method.A series of characterizations were carried out to explore the structure,morphology and performance of the Ap-TiO_(2)*** UV light illumination,the Ap-TiO_(2)-50 efficiently degrade 93.6%tetracycline hydrochloride(THc)after 4 hr,which increases by 8.3%compared with that of TiO_(2)powder suspension system with the same catalyst *** on it,Ap-ZnO,Ap-cdS,Ap-g-c_3N_4and Ap-pt-TiO_(2)are also fabricated,and applied in photocatalytic degradation and hydrogen evolution,which all exhibit higher photoactivities than powder suspension *** work provides a new avenue for the fabrication of advanced recyclable photocatalyst ***,the work offers a novel sight for the high-value utilization of aluminum-plastic package waste,which has positive implications for environmental protection.

关键词： TiO_(2) Self-suspending photocatalyst device Aluminum plastic

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Multifunctional properties of a polar spin chain compound[N(c_(3)H_(7))_(4)][cu(c_(8)H_(4)NO_(4))]·H_(2)O exhibiting both one-dimensional magnetism and nonlinear optical activity

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chinese chemical Letters 2024年第2期35卷 622-625页

作者： ang Li Yanhong Wang Haotian Tian Alimujiang Yalikun Yves journaux Min Luo Hongcheng Lu Key Laboratory of Material chemistry for Energy conversion and Storage School of Chemistry and Chemical EngineeringHubei Key Laboratory of Bioinorganic Chemistry & Materia MedicaHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of optoelectronic Materials chemistry and physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 35002China Institut parisien de chimie Moléculaire IPCMSorbonne UniversitéCNRSParis F-75252France

Functional materials with multiple properties are urgent to be explored to reach high requirements for applications *** this work,a new multifunctional one-dimensional(1D)chain compound[N(c_(3)H_(7))_(4)][cu(ohpma)]·H_(2)O 1(ohpma=deprotonated N-(2-hydoxyphenyl)oxamic acid)exhibiting both 1D antiferromagnetic and nonlinear optical properties,which are both originated from the same polar[cu(c_(8)H_(4)NO_(4))]magnetic units,has been successfully synthesized by evaporation at room ***-polydentate nature of the(ohpma)3−ligand with constrained tridentate and bidentate coordination sites conducts cu^(2+)ions coordinating in different geometries and forms 1D chains along the c axis,which are further separated by the[N(c_(3)H_(7))_(4)]+*** the 1D magnetic chains further exhibit noncentrosymmetric polar *** optical study shows polar compound 1 exhibits a discernible second-harmonic generation(SHG)efficiency and the calculation of the partial density of states indicates that the SHG efficiency of 1 is mainly originated from the polar[cu(c_(8)H_(4)NO_(4))]magnetic ***,magnetic susceptibility shows a broad maximum around 70 K with strong intrachain interaction of j/k B=−113.0 K but no long-range order is observed down to 2 K,suggesting that 1 shows a good 1D *** good 1D magnetism and SHG activity suggest that 1 could be as a potential multifunctional material,particularly.

关键词： Multifunctional properties Magnetic property Nonlinear optical property Evaporation One-dimensional chain

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Diabetes and high-glucose could upregulate the expression of receptor for activated c kinase 1 in retina

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World journal of Diabetes 2024年第3期15卷 519-529页

作者： jian Tan ang Xiao Lin Yang Yu-Lin Tao Yi Shao Qiong Zhou Department of Ophthalmology The First Affiliated HospitalJiangxi Medical CollegeNanchang UniversityNanchang 330006Jiangxi ProvinceChina

BAcKGROUND Diabetic retinopathy(DR)is a major ocular complication of diabetes mellitus,leading to visual *** pigment epithelium(RpE)injury is a key component of the outer blood retinal barrier,and its damage is an important indicator of *** for activated c kinase 1(RAcK1)activates protein kinase c-ε(pKc-ε)to promote the generation of reactive oxygen species(ROS)in RpE cells,leading to ***,we hypothesize that the activation of RAcK1 under hypoxic/high-glucose conditions may promote RpE cell apoptosis by modulating pKc-ε/ROS,thereby disrupting the barrier effect of the outer blood retinal barrier and contributing to the progression of *** To investigate the role and associated underlying mechanisms of RAcK1 in the development of early *** In this study,Sprague-Dawley rats and adult RpE cell line-19(ARpE-19)cells were used as in vivo and in vitro models,respectively,to explore the role of RAcK1 in mediating pKc-εin early ***,the impact of RAcK1 on apoptosis and barrier function of RpE cells was also investigated in the former *** Streptozotocin-induced diabetic rats showed increased apoptosis and upregulated expression of RAcK1 and pKc-εproteins in RpE cells following a prolonged ***,ARpE-19 cells exposed to high glucose and hypoxia displayed elevated mRNA and protein levels of RAcK1 and pKc-ε,accompanied by an increases in ROS production,apoptosis rate,and monolayer ***,silencing RAcK1 significantly downregulated the expression of pKc-εand ROS,reduced cell apoptosis and permeability,and protected barrier *** RAcK1 plays a significant role in the development of early DR and might serve as a potential therapeutic target for DR by regulating RpE apoptosis and barrier function.

关键词： Diabetic retinopathy Receptor for activated c kinase 1 protein kinase c-ε Adult retinal pigment epithelium cell line-19

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