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Magnetocaloric effect and slow magnetic relaxation behavior in binuclear rare earth based RE_(2)(L)_(2)(DMF)4(RE=Gd,Tb,and Dy) complexes

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Journal of Rare Earths 2022年第6期40卷 916-923,I0003页

作者： zhenqian zhang Yuwei Wu Haifeng Wang Lingwei Li Key Laboratory of Novel Materials for Sensor of Zhejiang Province Institute of Advanced Magnetic MaterialsHangzhou Dianzi UniversityHangzhou 310012China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi'an 710072China Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China

Three binuclear rare earth based complexes combining RE ions with semirigid tricarboxylic ligand(H_(3)L).namely,[RE_(2)(L)_(2)(DMF)_(4)][RE=Gd,Tb,and Dy;H_(3)L=5-((4-Carboxybenzyl)oxy)isophthalic acid;DMF=N,N-dimethylformamide]complexes,were fabricated success *** RE_(2)(L)_(2)(DMF)_(4) co mplexe s consist of two central RE ions with the same coordination environment which were connected by two tridentate bridging carboxylic groups and two syn-syn bidentate bridging carboxylic groups originating from the L^(3-)ligands to form the{RE_(2)}dimeric unit,and thus provides the basis for further constructing a dense three-dimensional(3 D)network ***,the present RE_(2)(L)_(2)(DMF)_(4) complexes can be described by a topology diagram with the topology point symbol of{4^(2)·6}_(2){4^(4)·6^(2)·8^(7)·10^(2)}.Weak antiferromagnetic(AFM)coupling between the adjacent RE ions for all the present complexes was found according to the magnetic *** observed significant cryogenic magnetocaloric effect(MCE)with the maximum magnetic entropy change-ΔS_(M)^(max) to be 26.3 J/(kg·K)withΔH=7 T in Gd_(2)(L)_(2)(DMF)_(4) complex makes it competitive for the cryogenic magnetic ***,the slow magnetic relaxation behavior at 0.2 T dc field with an obvious large U_(eff)/k=45(4)K and τ_(0)=6.5(2)×10^(-10)s was confirmed in Dy_(2)(L)_(2)(DMF)_(4)*** work not only provides an effective strategy for obtaining molecular materials with high MCE,but also confirms that tricarboxylate ligands are the ideal choice for constructing stable high dimensional geometric structures.

关键词： Magnetocaloric effect Rare earth based complex Magnetic properties Slow magnetic relaxation bahavior

Achievement of promising cryogenic magnetocaloric performances in La_(1-x)Pr_(x)Fe_(12)B_(6)compounds

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Journal of Materials Science & Technology 2021年第33期92卷 138-142页

作者： Zhipan Ma Xiaoshi Dong zhenqian zhang Lingwei Li Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China Key Laboratory of Novel Materials for Sensor of Zhejiang Province Institute of Advanced Magnetic MaterialsHangzhou Dianzi UniversityHangzhou 310012China

The magnetic refrigeration(MR)utilizing magnetocaloric effect(MCE)has been recognized as an environmentally friendly and energy efficiency *** we presented the magnetic properties and MCE in Pr-doped La_(1-x)Pr_(x)Fe_(12)B_(6)(x=0.05-0.2)itinerant-electron metamagnetic(IEM)compounds.A small amount of Pr doping La site can greatly improve the peak values in the magnetic entropy change S_(M)(T)curves,especially under relatively low magnetic field changes(ΔH).Additionally,the peak temperature increases gradually and the magnetic hysteresis reduces gradually with increasing *** observed MCE in present La_(1-x)Pr_(x)Fe_(12)B_(6)compounds is related to its field-induced first-ordered IEM *** peak values ofΔS_(M)for La_(1-x)Pr_(x)Fe_(12)B_(6)compounds reach 13.4,15.4,12.5 and 13.0 J/(kg K)at T_(C)~58,68,72and 89 K for x=0.05,0.10,0.15 and 0.2 under H of 0-7 T,*** corresponding relative cooling power values are 462.3,480.7,372.4 and 375.7 J/*** present La_(1-x)Pr_(x)Fe_(12)B_(6)compounds could be good candidates for active MR application if the magnetic and thermal hysteresis can be further *** present work indicates that the La Fe_(12)B_(6)-based material system could also exhibit promising magnetocaloric performances.

关键词： Magnetocaloric effect(MCE) Rare earth La_(1-x)Pr_(x)Fe_(12)B_(6)compounds Magnetic properties

Commercial Application of Novel FDFCC Grid Packing Type Stripper

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China Petroleum Processing & Petrochemical Technology 2007年第4期9卷 43-47页

作者： zhang zhenqian Tian Geng Lei Shiyuan SINOPEC Luoyang Petrochemical Engineering Company Luoyang 471003

The novel FDFCC grid packing stripper is used to raise the stripping efficiency of the equipment. This technology aims to increase the gas-solid contact area and improve the gas-solid contact efficiency. This technology has been applied in the revamped 1.05 Mt/a No. 1 FCC unit at the SINOPEC Changling Branch Company. The outcome on application of this equipment has revealed that the fluidization of the stripper was stable coupled with smooth operation. At a steam stripping load of less than 50% of the design value the spent catalyst had a lower H/C ratio, and the hydrogen content in the coke after revamp of the FCC unit decreased by 8.1% compared to the case before the equipment revamp. The spent catalyst had higher activity with the dry gas and coke yields reduced by over 0.5%, resulting in goodeconomic benefits.

关键词： catalyst grid packing stripper fluidized bed commercial application catalytic cracking

Sono-assembly of folate-decorated curcumins/alginate core-shell microcomplex and its targeted delivery and pH/reduction dual-triggered release

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Particuology 2024年第1期84卷 168-177页

作者： Qingye Meng Shuangling Zhong Jingfei Wang zhenqian zhang Yan Gao Xuejun Cui College of Chemistry Jilin University Changchun130012China College of Resources and Environment Jilin Agricultural University Changchun130118China State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun130012China Weihai Institute for Bionics-Jlin University Weihai264400China

In this study,sodium alginate(SA),a non-toxic natural polysaccharide with good biocompatibility and biodegradability,was developed for targeted delivery of curcumin(CUR)in tumor *** strategy is to sulfhydrylate the folic acid(FA)modified SA,and the CUR dissolved in ethyl acetate(EAC)phase is coated in microcapsules by a quick,efficient and environment-friendly sonochemical *** EAC in the microcapsule core is volatile,which can be recycled and reused to reduce *** prepared mi-crocapsules(FA-RSMCs@CUR)exhibited similar toxicity to free curcumin in anti-tumour evaluation in ***-RSMCs@CUR also exhibited effective antibacterial properties in the antibacterial evaluation in *** is expected to become a low-cost tumor targeting vector in the future,and has the potential to be promoted in clinical application.

关键词： Reductive-responsive Sodium alginate Microcapsule Targeted delivery Sonochemical

Calcium-dependent protein kinases CPK21 and CPK23 phosphorylate and activate the iron-regulated transporter IRT1 to regulate iron deficiency in Arabidopsis

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Science China(Life Sciences) 2023年第11期66卷 2646-2662页

作者： zhangqing Wang Yanting zhang Yisong Liu Dali Fu zhang You Panpan Huang Huiling Gao zhenqian zhang Cun Wang State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences Northwest A&F UniversityYangling 712100China Institute of Future Agriculture Northwest Agriculture&Forestry UniversityYangling 712100China

Iron(Fe)is an essential micronutrient for all *** availability in the soil is usually much lower than that required for plant growth,and Fe deficiencies seriously restrict crop growth and ***(Ca2+)is a second messenger in all eukaryotes;however,it remains largely unknown how Ca2+regulates Fe *** this study,mutations in CPK21 and CPK23,which are two highly homologous calcium-dependent protein kinases,conferredimpaired growth and rootdevelopment under Fe-deficient conditions,whereas constitutively active CPK21 and CPK23 enhanced plant tolerance to Fe-deficient ***,we found that CPK21 and CPK23 interacted with and phosphorylated the Fe transporter IRONREGULATED TRANSPORTER1(IRT1)at the Ser149 *** analyses and complementation of Fe transport in yeast and plants indicated that IRT1 Ser149 is critical for IRT1 transport *** together,these findings suggest that the CPK21/23-IRT1 signaling pathway is critical for Fe homeostasis in plants and provides targets for improving Fe-deficient environments and breeding crops resistant to Fe-deficient conditions.

关键词： Arabidopsis calcium-dependent protein kinases IRT1 iron

Development of the automatic navigation system for combine harvester based on GNSS

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 163-171页

作者： Shichao Li Man zhang Ruyue Cao Yuhan Ji zhenqian zhang Han Li Yanxin Yin Key Lab of Modern Precision Agriculture System Integration Research Ministry of EducationChina Agricultural UniversityBeijing 100083China National Research Center of Intelligent Equipment for Agriculture Beijing 100097China

An automatic navigation system was developed to realize automatic driving for combine harvester,including the mechanical design,control method and software *** of all,for the harvester modified with the automatic navigation system,a dynamic calibration method of the rear wheel center position was *** control part included the navigation controller and the steering controller.A variable universe fuzzy controller was designed to the navigation controller,which used fuzzy control to change the fuzzy universe of input and output dynamically,that means,under the condition that the fuzzy rules remain unchanged,the fuzzy universe changes with the change of input,which is an adaptive fuzzy control method and can modify the control strategy in *** realize the automatic navigation of the harvester,the decision result of the navigation controller based on the variable universe fuzzy control was input into the steering controller,and then the electric steering wheel was controlled to *** test the performance of the designed automatic navigation system,the field experiment was carried *** the combine harvester was navigating linearly at a speed of 0.8 m/s,the overall root mean square error(RMSE)of the lateral deviation was 5.87 *** test results showed that the system was designed could make the combine track the preset path smoothly and stably,and the tracking accuracy was at the centimeter level.

关键词： automatic navigation system combine harvester GNSS development dynamic calibration variable universe adaptive fuzzy control

Morphological determination of localization and function of Golgi proteins

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Biophysics Reports 2024年第2期10卷 121-132页

作者： Yusheng Xing Yannan Jian Xiaodan Zhao Yue zhang zhenqian zhang Xing zhang Xiaoyan zhang College of Biomedicine and Health College of Life Science and Technology Huazhong Agricultural University

In animal cells, the Golgi apparatus serves as the central hub of the endomembrane secretory *** is responsible for the processing, modification, and sorting of proteins and lipids. The unique stacking and ribbon-like architecture of the Golgi apparatus forms the foundation for its precise functionality. Under cellular stress or pathological conditions, the structure of the Golgi and its important glycosylation modification function may change. It is crucial to employ suitable methodologies to study the structure and function of the Golgi apparatus, particularly when assessing the involvement of a target protein in Golgi regulation. This article provides a comprehensive overview of the diverse microscopy techniques used to determine the specific location of the target protein within the Golgi apparatus. Additionally, it outlines methods for assessing changes in the Golgi structure and its glycosylation modification function following the knockout of the target gene.

关键词： Electron microscopy Super-resolution microscopy Golgi apparatus Glycosylation Immunofluorescence Golgi fragmentation Lectin staining

Ca^(2+)-dependent successive phosphorylation of vacuolar transporter MTP8 by CBL2/3-CIPK3/9/26 and CPK5 is critical for manganese homeostasis in Arabidopsis

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Molecular Plant 2022年第3期15卷 419-437页

作者： Chuanfeng Ju zhenqian zhang Jinping Deng Cuicui Miao zhangqing Wang Lukas Wallrad Laiba Javed Dali Fu Ting zhang Jörg Kudla Zhizhong Gong Cun Wang State Key Laboratory of Crop Stress Biology for Arid Areas College of Life Sciencesand Institute of Future AgricultureNorthwest Agriculture&Forestry UniversityYanglingShaanxi 712100China State Key Laboratory of Plant Physiology and Biochemistry College of Biological SciencesChina Agricultural UniversityBeijing 100193China Institut fur Biologie und Biotechnologie der Pflanzen Westfälische Wilhelms-Universität48149 MünsterGermany College of Life Sciences Hebei UniversityBaodingChina

Manganese(Mn)is an essential micronutrient for all living ***,excess Mn supply that can occur in acid or waterlogged soils has toxic effects on plant physiology and *** a variety of Mn transporter families have been characterized,we have only a rudimentary understanding of how these transporters are regulated to uphold and adjust Mn homeostasis in ***,we demonstrate that two calcineurin-B-like proteins,CBL2/3,and their interacting kinases,CIPK3/9/26,are key regulators of plant Mn *** mutants lacking CBL2 and 3 or their interacting protein kinases CIPK3/9/26 exhibit remarkably high Mn ***,CIPK3/9/26 interact with and phosphorylate the tonoplast-localized Mn and iron(Fe)transporter MTP8 primarily at Ser35,which is conserved among MTP8 proteins from various *** transport complementation assays in yeast combined with multiple physiological assays indicate that CBL-CIPK-mediated phosphorylation of MTP8 negatively regulates its transport activity from the cytoplasm to the ***,we show that sequential phosphorylation of MTP8,initially at Ser31/32 by the calcium-dependent protein kinase CPK5 and subsequently at Ser35 by CIPK26,provides an activation/deactivation fine-tuning mechanism for differential regulation of Mn ***,our findings define a two-tiered calcium-controlled mechanism for dynamic regulation of Mn homeostasis under conditions of fluctuating Mn supply.

关键词： manganese Ca^(2+) calcineurin B-like proteins(CBLs) CBL-interacting protein kinases(CIPKs) Mn transporter MTP8 calcium-dependent protein kinases(CPKs)

TaNRAMP3 is essential for manganese transport in Triticum aestivum

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Stress Biology 2023年第1期3卷 453-462页

作者： zhangqing Wang Yanting zhang Chenyu Cao Jiaming Liu Yuan Deng zhenqian zhang Cun Wang National Key Laboratory of Crop Improvement for Stress Tolerance and Production Northwest A&F UniversityYanglingShaanxi 712100People’s Republic of China

Manganese(Mn)is an essential trace element for almost all living *** plants,Mn deficiency,which is occurs in calcareous soils or alkaline soils,severely limiting crop ***,the potential mechanism of Mn transport in Triticum aestivum is still ***,we found that TaNRAMP3,a member of the naturally resistant macrophage protein(NRAMP)family in Triticum aestivum,is located in the plasma membrane of protoplasts and functions as an influx transporter for Mn in yeast(Δsmf1).The expression of TaNRAMP3 was induced under Mn-deficiency ***,TaNRAMP3-RNAi plants exhibited a sensitive phenotype,while transgenic plants overexpressing TaNRAMP3 showed a tolerant *** addition,TaNRAMP3 rescued the sensitive phenotype of Arabidopsis nramp1 mutant under Mn deficiency *** summary,our study reveals the key role of TaNRAMP3 in Mn transport in Triticum aestivum,allowing it to adapt to Mn-deficiency *** findings provide new insights for the cultivation of Mn-deficiency tolerant wheat varieties.

关键词： Manganese Triticum aestivum TaNRAMP3 Transporter