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Dual effect of Cu on the Al3Sc nanoprecipitate coarsening

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Journal of Materials Science & Technology 2020年第2期37卷 38-45页

作者： y.h.gao L.F.Cao J.Kuang J.y.Zhang G.Liu J.Sun State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049China International Joint Laboratory for Light Alloys(Ministry of Education) Chongqing UniversityChongqing 400044China

It is generally considered that the Al3Sc nanoprecipitates are highly thermal stable,mainly due to quite slow Sc diffusion in theα-Al *** this paper,we demonstrate in an Al-Cu-Sc alloy that the Cu atoms have dual effect on the coarsening of Al3Sc *** the one hand,the Cu atoms with high diffusivity tend to accelerate the Al3Sc coarsening,which results from the Cu-promoted Sc *** the other hand,some Cu atoms will segregate at the Al3Sc/matrix interface,which further stabilizes the Al3Sc nanoprecipitates by reducing the interfacial *** between these two effects is tailored by temperature,which rationalizes the experimental findings that the coarsening kinetics of Al3Sc nanoprecipitate is greatly boosted at 300℃-overaging while significantly suppressed at 400℃-overaging.

关键词： Al alloys Precipitate coarsening Interfacial segregation Microstructural evolution

[Analysis of coexisting and associated factors of intracerebral hemorrhage lesions in patients with recent subcortical small infarct]

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Zhonghua yi xue za zhi 2025年第7期105卷 529-536页

作者： Z R Wu C Zong K Zhang h B Liu y y Zhao y h Wang y gao y M Xu Department of Neurology the First Affiliated Hospital of Zhengzhou University NHC Key Laboratory of Prevention and Treatment of Cerebrovascular Disease Zhengzhou 450052China. Department of General ICU the First Affiliated Hospital of Zhengzhou University Zhengzhou 450052China.

To explore the clinical characteristics and related risk factors of intracerebral hemorrhage (ICh) lesions identified on susceptibility-weighted imaging (SWI) sequences in patients with recent subcortical small infarct (RSSI). The patients with lenticulostriate artery territory RSSI admitted to the Department of Neurology, the First Affiliated hospital of Zhengzhou University from January 2019 to December 2022 was retrospectively collected. Demographic information, past medical history, laboratory, and imaging data were collected. Observe the ICh lesions in patients on the brain SWI sequence and divide RSSI patients into the coexisting-ICh group (=37) and the non-ICh group (=324) according to whether they have ICh. At the same time, the hemorrhage-related imaging features coexisting such as cerebral microbleeds (CMBs), cerebral surface siderosis (cSS), and probable cerebral amyloid angiopathy (CAA). Multifactorial logistic regression model was used to analyze the associated factors of ICh lesions in RSSI patients. A total of 361 patients with RSSI in the lenticulostriate artery territory area were included. The mean age was (60±12) years, with 243 male patients (67.3%). Among them, 37 patients (10.2%) had coexisting ICh lesions, mainly presenting as strict deep type [29 cases (78.4%)], with others including strict lobar type [2 cases (5.4%)], infratentorial type [2 cases (5.4%)], and mixed type[ 4 cases (10.8%)]. 30 cases (8.3%) had concomitant strict lobar CMBs, 5 cases (1.4%) had cSS, and 23 cases (6.4%) met the Boston 2.0 criteria for probable CAA. Multivariate logistic regression model analysis revealed that the high-grade enlargement of perivascular spaces in the basal ganglia (hEPVS) (=3.356,95%:1.208-9.320,=0.020) were associated with the presence of ICh lesions. When the total cerebral small vessel disease (CSVD) burden score was used to represent other CSVD imaging markers for analysis, the CSVD total burden score (=2.319,95%:1.596-3.372,<0.001) was also

关键词：脑出血近期皮质下小梗死脑微出血皮质表面铁沉积血管周围间隙横断面研究

ARF4 acting upstream of LBD16 promotes adventitious root formation in peach

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horticultural Plant Journal 2025年第1期11卷 145-161页

作者： Jingjing Liu Lingling gao Ruoxi Zhang Anqi gao Zamith Kerubo Oginga Beibei Zheng yuepeng han CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenThe Innovative Academy of Seed Design of Chinese Academy of SciencesWuhanHubei 430074China hubei hongshan Laboratory WuhanHubei 430070China University of Chinese Academy of Sciences Beijing 100049China

Although class A auxin response factors(ARFs)are known to regulate adventitious root(AR)development through the canonical SCFTIR1-Aux/IAA-ARF signaling pathway,the regulatory role of class B ARFs in AR development remains largely ***,this research focused on the role of class B ARF transcription factors in peach(Prunus persica‘Shengli')adventitious root ***,we report the role of a class B ARF gene Pp ARF4 in adventitious root formation in *** transcriptome and q RT-PCR analyses showed that the transcription of Pp ARF4 was significantly up-regulated in auxin-treated stem explants.y2h assay showed that Pp ARF4 had no interaction with Pp IAAs(AUXIN/INDOLE ACETIC ACIDs).Pp ARF4 could bind the promoters of lateral root development gene Pp LBD16 and auxin transport gene Pp PIN1 to activate their *** overexpression of Pp ARF4 and Pp LBD16 in Arabidopsis promoted AR ***,Pp ARF4 could act as a negative regulator of flavone synthesis and thus prevent the explants from *** results not only provide novel insights into the functions of ARFs in regulating plant growth and development,but will also be useful for fulfilling asexual propagation by stem cuttings in peach.

关键词： Prunus persica Adventitious root Auxin Pp ARF4 Pp LBD16

Mossbauer,optical and structural properties of Fe^(3+) ion in borate glass

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Journal of Rare Earths 2025年第1期43卷 162-170,I0006页

作者： Essam A.Elkelany hesham y.Amin A.Samir M.M.EL-hady h.h.El-Bahnasawy Moukhtar A.hassan Basic Science Department Faculty of EngineeringSinai UniversityAl-Arish45511Egypt School of Information and Electrical Engineering Hangzhou City UniversityHangzhou30015China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou310027China Basic Science Department Faculty of Engineering at ShoubraBenha University11629Egypt Physics Department Faculty of ScienceAl-Azhar University11884CairoEgypt

Lanthanum-bearing iron lithium borate glass is a quaternary system for oxide glasses and was prepared via the melt-quenching *** present article correlates the structure,optical,ligand field and M?ssbauer data on iron lithium borate glass co ntaining La^(3+).The density was measured,while the molar volume was *** physical parameters are *** increasing the La_(2)O_(3) content within the glass network,infrared spectra analysis reveals structural modifications such as the increase in BO_(4) units and the decline in both BO_(3) units and NBO bonds ***,optical absorption spectra were *** absorption spectra disclose a plethora of electronic transitions that are related to Fe^(3+)in tetrahedral and octahedral sites,however,Fe^(2+)phase is not observed in optical spectra,but it has a clear signature in M?ssbauer ***,the glass absorption edges undergo a clear blue shift,reflecting an increased band gap energy(1.96-2.28 eV).The decline in NBO bonds justifies this ***,the values of crystal field splitting are increased,while the values of Racah parameters are *** trend is justified by the decline in NBO bonds and increases electron localization around Fe cations.M?ssbauer spectra confirm the existence of Fe^(3+)in tetrahedral and octahedral sites,while Fe^(2+)exists in only a tetrahedral *** increasing La_(2)O_(3) content,the isomer shift of Fe^(3+)in tetrahedral sites changes to be 0.312-0.329 mm/s,while the isomer shift of octahedral Fe^(3+)is 0.424-0.456 mm/*** findings coincide with optical *** the isomer shift of tetrahedral Fe^(2+)is 0.902-0.911 mm/*** results of structural,optical and ligand field associated with M?ssbauer spectra open more vistas toward the utility of these samples in the optics realm.

关键词： Fe3+ions Rare-earth oxide Mossbauer spectra Ligand field parameters Optical properties

Phosphorylation modification reverses the transcriptional inhibitory activity of CsMyB4a in tea plants(Camellia sinensis)

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horticultural Plant Journal 2025年第1期11卷 406-416页

作者： Guoliang Ma yunyun han Tongtong Li Tao Xia Liping gao School of Life Science Anhui Agricultural UniversityHefeiAnhui 230036China State Key Laboratory of Tea Plant Biology and Utilization Key Laboratory of Tea Biology and Tea Processing of Ministry of AgricultureAnhui Provincial Laboratory of Tea Plant Biology and UtilizationAnhui Agricultural UniversityHefeiAnhui 230036China

The members of the fourth subgroup of R2R3-MyB(Sg4 members)are well-known inhibitors of phenylpropanoid and lignin synthesis *** C2 domain is closely related to the transcriptional inhibitory activity of Sg4 *** modification enhances the transcriptional inhibitory activity of Sg4 ***,we identified a phosphorylation site on the C2 domain of Cs MyB4a from tea plants(Camellia sinensis).A mitogen-activated protein kinase(MAPK),named Cs MPK3-2,phosphorylated this site on the C2 domain of Cs *** experiments revealed that phosphorylation of Cs MyB4a weakened its ability to inhibit the gene expression of PAL,C4h,and 4CL in the phenylpropanoid pathway and activated the expression of transcription factor yABBy5,maintaining the adaxial-abaxial polarity of the *** out Nt yAB5 in Cs MyB4a transgenic tobacco partially repaired the leaf wrinkling phenotype caused by Cs *** C1 domain exhibited an activation function when the C2 domain of Cs MyB4a was phosphorylated by Cs MPK3-2,causing this reversal *** results enrich our understanding of the regulatory diversity of Sg4 members.

关键词： Camellia sinensis Cs MyB4a Phenylpropanoid pathway MAPK yABBy Leaf development

Co_(0.5)Zn_(0.5)Fe_(2)O_(4)modified residual carbon as an excellent microwave absorber

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 534-545页

作者： yuanchun Zhang Dacheng Ma Xingzhao Zhang Chuanlei Zhu Shengtao gao School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining Anhui University of Science and TechnologyHuainan 232001China

Microwave absorbers have great potential for military and civil ***,Co_(0.5Z)n_(0.5)Fe_(2)O_(4)/residual carbon(CZFO/RC)composites have been successfully prepared using a hydrothermal *** was derived from coal gasification fine slag(CGFS)via pickling,which removes inorganic *** test means have been used to study the chemical composition,crys-tal structure,and micromorphology of the CZFO/RC composites,as well as their electromagnetic parameters and microwave absorption(MA)*** CZFO/RC composites exhibit excellent MA performance owing to their dielectric and magnetic *** the thickness of CZFO/RC-2(FeCl_(3)·6h_(2)O of 0.007 mol,ZnCl_(2)of 0.00175 mol,and CoCl_(2)·6h_(2)O of 0.00175 mol)is 1.20 mm,the minimum reflection loss(RL_(min))is-56.24 dB,whereas at a thickness of 3.00 mm and 6.34 Ghz,RL_(min) is-45.96 dB and the maximum effective ab-sorption bandwidth is 1.83 Ghz(5.53-7.36 Ghz).Dielectric loss includes interface and dipole polarizations,while magnetic loss includes current and remnant magnetic ***/RC-2 exhibits high impedance matching,allowing microwave to enter the *** com-puter simulation technology confirms that CZFO/RC-2 considerably decreases the radar *** study can be used to promote the use of CGFS as electromagnetic wave(EMW)-absorbing materials.

关键词： cobalt-zinc ferrite residual carbon microwave absorption coal gasification fine slag coal-based solid waste

Unveiling the promotion role of ZnO on Zn-Al spinel oxide for CO_(2)hydrogenation

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Journal of Energy Chemistry 2025年第1期100卷 18-25页

作者： Tongyao Wang Xinlong yao Lixin Liang hongyu Chen Pan gao Guangjin hou State Key Laboratory of Catalysis Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

The Zn-Al spinel oxide stands out as one of the most active catalysts for high-temperature methanol synthesis from CO_(2)***,the structure–activity relationship of the reaction remains poorly understood due to challenges in atomic-level structural characterizations and analysis of reaction *** this study,we prepared two Zn-Al spinel oxide catalysts via coprecipitation(ZnAl-C)and hydrothermal(ZnAl-h)methods,and conducted a comparative investigation in the CO_(2)hydrogenation ***,under similar conditions,ZnAl-C exhibited significantly higher selectivity towards methanol and DME compared to *** characterizations using X-ray diffraction(XRD),Raman spectroscopy and electron paramagnetic resonance(EPR)unveiled that ZnAl-C catalyst had abundant ZnO species on its surface,and the interaction between the ZnO species and its ZnAl spinel oxide matrix led to the formation of oxygen vacancies,which are crucial for CO_(2)adsorption and ***,state-of-the-art solid-state nuclear magnetic resonance(NMR)techniques,including ex-situ and in-situ NMR analyses,confirmed that the surface ZnO facilitates the formation of unique highly reactive interfacial formate species,which was readily hydrogenated to methanol and *** insights elucidate the promotion effects of ZnO on the ZnAl spinel oxide in regulating active sites and reactive intermediates for CO_(2)-to-methanol hydrogenation reaction,which is further evidenced by the significant enhancement in methanol and DME selectivity observed upon loading ZnO onto the ZnAl-h *** molecular-level mechanism understandings reinforce the idea of optimizing the ZnO-ZnAl interface through tailored synthesis methods to achieve activity-selectivity balance.

关键词： CO_(2)hydrogenation Spinel oxide Zno Solid-state NMR

Channel pruning on frequency response

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Science China(Information Sciences) 2025年第1期68卷 159-170页

作者： hang LIN yifan PENG Lin BIE Chenggang yAN Xibin ZhAO yue gao School of Software Tsinghua University School of Automation Hangzhou Dianzi University

Network pruning has a significant role in reducing network parameters and accelerating the inference time of the network. Some existing methods prune the network based on the frequency of the data, and finally obtain a sub-network with high accuracy. however, according to our experimental analysis, different frequencies of information in the data contribute differently to the accuracy of the model, and using this information directly for pruning without making a selection will lead to incorrect results. We believe that pruning should retain the convolutional kernels in the network that process important information, while those kernels that process unimportant information should be removed. In this paper, we first investigate the meaning of each frequency band information in the spectrum and their contribution to the prediction accuracy of the network,and according to these results, we propose a new pruning method based on frequency response(PFR). Our PFR finds and removes the convolutional kernels in the network that specialize in processing unimportant information, resulting in a compact neural network model. PFR obtains significant experimental results on different datasets, for example, a 56.0% raduction of float points operations(FLOPs) on Res Net-50 and only 0.37% of Top-1 accuracy degradation on the Image Net dataset.

关键词： deep learning model compression filter pruning channel pruning frequency response

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Ce-UiO-66 nanozymes with charge-regulated uricase-like activity for enzyme/reagent-free detection of uric acid

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Nano Research 2025年第2期18卷 675-686页

作者： Zhixiong Guo Da Chen Wei gao yongquan Qu Zhimin Tian Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710054China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Designing highly performed uricase-like nanozymes through enzymatic-like colorimetric analysis system is of vital significance for the quantitative detection of uric acid(UA).herein,series of Ce-UiO-66 nanozymes with different surface charges through the ligand engineering strategy were rationally designed and synthesized as efficient uricase mimics with tailorable uricase-like activities to catalytically convert UA into allantoin and ***,by tuning the functional groups of 1,4-benzoic acid ligands,we explored the relationships between the surface charges of Ce-UiO-66-X(X=h,NO_(2),Br,Ch_(3),and Oh)nanozymes and their uricase-like *** them,Ce UiO-66-Ch_(3) with the moderate surface charge exhibited optimal substrate adsorption and product desorption,displaying the highest uricase-like ***,h2O2,as the product of UA oxidation,enabled Ce-UiO-66-Ch_(3) itself as a dose-dependent chromogenic substrate of h_(2)O_(2),giving a white-to-orange color evolution due to the Ce-UiO-66-Ch_(3)-to-CeO_(2) phase ***,a smartphone-assisted all-in-one enzyme/reagent-free biosensor based on Ce-UiO-66-Ch_(3) was established for the precise visual detection of UA analysis,which was featured by a wide detection range(31–4000µM),a high sensitivity(limit of detection:8.9µM),a rapid response(-3 min),a high structural stability,and a high anti-interference ability.

关键词： Ce-UiO-66 uricase-like nanozyme colorimetric uric acid analysis enzyme/reagent-free detection smartphone