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Graphene reinforced nanoarchitectonics of 3D interconnected magnetic-dielectric frameworks for high-efficient and anti-corrosive microwave absorbers

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Journal of Materials Science & Technology 2024年第1期168卷 194-207页

作者： Chenchen Liu Xiaofang Feng Shuning Liu Guo Lin Zhongxiang Bai Lingling Wang Ke zhu Xiulan Li xiaobo Liu School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials Chengdu611731China School of Chemical Engineering Northwest UniversityXi’an710069China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou510275China

The combination of high efficiency and environmental stability is vital to promote the commercial appli-cations of microwave absorption(MA)materials,yet remains challenging in the absence of facile routes.Here,we put forward a graphene-reinforced construct approach for one-pot synthesis of 3D intercon-nected magnetic-dielectric frameworks via pre-functionalization and subsequent assembly.Multiple in-teractions among discrete precursors are capable of manipulating the confined growth and interfacial self-assembly.Significant enhancements in MA properties are triggered in a straightforward manner us-ing ultralow feeding fractions of graphene oxide nanosheet.The minimum reflection loss is up to-60.1 dB(99.9999%wave absorption)and the effective absorption bandwidth reaches 5.9 GHz(almost covering the Ku band).Remarkably,based on the optimization by ultralow concentrations of graphene,the as-prepared nanoarchitecture simultaneously integrates strong absorption,broad bandwidth,and low matching thick-ness.The embedded graphene nanosheets serve as high-speed electron transmission channels and hollow resonance cavities,facilitating multimode attenuations and impedance-matching characteristics.Mean-while,the graphene-reinforced framework suppresses the corrosion of magnetic components,whose cor-rosion rate reduces by an order of magnitude.This study provides a simple procedure to boost magnetic-dielectric absorbers for comprehensive MA performances and enhanced corrosion resistance.

关键词： 3D Magnetic-dielectric framework Graphene nanosheet Microwave absorption Anti-corrosion

JA-mediated MYC2/LOX/AOS feedback loop regulates osmotic stress response in tea plant

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Horticultural Plant Journal 2024年第3期10卷 931-946页

作者： Junyan zhu Hongrong Chen Lu Liu xiaobo Xia Xiaomei Yan Xiaozeng Mi Shengrui Liu Chaoling Wei State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Tea Processing of Ministry of Agriculture/Anhui Provincial Laboratory of Tea Plant Biology and Utilization Anhui Agricultural UniversityHefeiAnhui 230036China

Osmotic stress caused by low-temperature,drought and salinity was a prevalent abiotic stress in plant that severely inhibited plant development and agricultural yield,particularly in tea plant.Jasmonic acid(JA)is an important phytohormone involving in plant stress.However,underlying molecular mechanisms of JA modulated osmotic stress response remains unclear.In this study,high concentration of mannitol induced JA accumulation and increase of peroxidase activity in tea plant.Integrated transcriptome mined a JA signaling master,MYC2 transcription factor is shown as a hub regulator that induced by mannitol,expression of which positively correlated with JA biosynthetic genes(LOX and AOS)and peroxidase genes(PER).CsMYC2 was determined as a nuclei-localized transcription activator,furthermore,ProteinDNA interaction analysis indicated that CsMYC2 was positive regulator that activated the transcription of CsLOX7,CsAOS2,CsPER1 and CsPER3via bound with their promoters,respectively.Suppression of CsMYC2 expression resulted in a reduced JA content and peroxidase activity and osmotic stress tolerance of tea plant.Overexpression of CsMYC2 in Arabidopsis improved JA content,peroxidase activity and plants tolerance against mannitol stress.Together,we proposed a positive feedback loop mediated by CsMYC2,CsLOX7 and CsAOS2 which constituted to increase the tolerance of osmotic stress through fine-tuning the accumulation of JA levels and increase of POD activity in tea plant.

关键词： Camellia sinensis Jasmonic acid(JA) MYC2 transcription factor Lipoxygenase(LOX) Osmotic stress Peroxidase(POD) Reactive oxygen species(ROS)

From plant immunity to crop disease resistance

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Journal of Genetics and Genomics 2022年第8期49卷 693-703页

作者： Yan Zhao xiaobo zhu Xuewei Chen Jian-Min Zhou State Key Laboratory of Plant Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Sichuan Agricultural University at WenjiangChengduSichuan 611130China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China Hainan Yazhou Bay Seed Laboratory SanyaHainan 572025China

Plant diseases caused by diverse pathogens lead to a serious reduction in crop yield and threaten food security worldwide.Genetic improvement of plant immunity is considered as the most effective and sustainable approach to control crop diseases.In the last decade,our understanding of plant immunity at both molecular and genomic levels has improved greatly.Combined with advances in biotechnologies,particularly clustered regularly interspaced short palindromic repeat(CRISPR)/Cas9-based genome editing,we can now rapidly identify new resistance genes and engineer disease-resistance crop plants like never before.In this review,we summarize the current knowledge of plant immunity and outline existing and new strategies for disease resistance improvement in crop plants.We also discuss existing challenges in this field and suggest directions for future studies.

关键词： Plant immunity Disease resistance Resistance genes Molecular breeding Genetic engineering Crops

The global regulation of c-di-GMP and cAMP in bacteria

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mLife 2024年第1期3卷 42-56页

作者： Cong Liu Rui Shi Marcus S.Jensen Jingrong zhu Jiawen Liu xiaobo Liu Di Sun Weijie Liu Jiangsu Key Laboratory of Phylogenomics&Comparative Genomics School of Life SciencesJiangsu Normal UniversityXuzhouChina Key Laboratory of Metabolic Engineering and Biosynthesis Technology Ministry of Industry and Information TechnologyNanjing University of Science and TechnologyNanjingChina

Nucleotide second messengers are highly versatile signaling molecules that regulate a variety of key biological processes in bacteria.The best-studied examples are cyclic AMP(cAMP)and bis-(3'-5')-cyclic dimeric guanosine monophosphate(c-di-GMP),which both act as global regulators.Global regulatory frameworks of c-di-GMP and cAMP in bacteria show several parallels but also significant variances.In this review,we llustrate the global regulatory models of the two nucleotide second messengers,compare the different regulatory frameworks between c-di-GMP and cAMP,and discuss the mechanisms and physiological significance of cross-regulation between c-di-GMP and cAMP.c-di-GMP responds to numerous signals de-pendent on a great number of metabolic enzymes,and it regulates various signal transduction pathways through its huge number of effectors with varying activities.In contrast,due to the limited quantity,the cAMP metabolic enzymes and its major effector are regulated at different levels by diverse signals.cAMP performs its global regulatory function primarily by controlling the transcription of a large number of genes via cAMP receptor protein(CRP)in most bacteria.This review can help us understand how bacteria use the two typical nucleotide second messengers to effectively coordinate and integrate various physiological processes,providing theoretical guidelines for future research.

关键词： bacteria cAMP c-di-GMP cross-regulation CRP

改进的DeeplabV3Plus高分辨率遥感影像土地覆盖分类

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计算机工程与应用 2024年第13期60卷 266-275页

作者：朱凡罗小波重庆邮电大学计算机科学与技术学院重庆400065 重庆邮电大学空间大数据智能技术重庆市工程研究中心重庆400065

高分辨率遥感图像中提取的土地覆盖信息在城市规划建设和土地利用等领域具有巨大的价值,但由于土地覆盖类型复杂、光谱差异性较小等因素,目前对土地覆盖类别进行高质量的语义分割仍然受到一定限制。因此,针对该问题提出了一种新颖的全... 详细信息

高分辨率遥感图像中提取的土地覆盖信息在城市规划建设和土地利用等领域具有巨大的价值,但由于土地覆盖类型复杂、光谱差异性较小等因素,目前对土地覆盖类别进行高质量的语义分割仍然受到一定限制。因此,针对该问题提出了一种新颖的全连接网络MFC-Net,该模型采用全新的基于点积注意力的空洞空间金字塔池化模块(DPA-ASPP),提高了聚合上下文信息方面的能力及效率。更进一步的,针对不同尺度的特征提出了注意力增强融合模块(AEFM)来增强特征表示,改善不同形状和大小地物的分割效果。该模型充分利用了高分辨率遥感影像中丰富的上下文信息及多尺度信息,在LoveDA大型遥感图像数据集上取得了优于当前主流模型的分割结果(84.26%MPA和69.67%MIOU)。

关键词：遥感图像深度学习语义分割土地覆盖分类 LoveDA数据集

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巨大芽孢杆菌在赤泥脱碱中的应用及作用机制

中国有色金属学报 2024年第3期34卷 947-958页

作者：王林李望朱晓波燕旭东河南理工大学化学化工学院焦作454000

赤泥是氧化铝生产过程中产生的工业废渣,其强碱性使得赤泥存在环境污染风险高、资源化利用困难等问题。因此,急需寻求赤泥脱碱的有效方法和新途径。微生物脱碱法因其经济有效、无二次污染的特点而备受关注。本文利用巨大芽孢杆菌菌液对... 详细信息

赤泥是氧化铝生产过程中产生的工业废渣,其强碱性使得赤泥存在环境污染风险高、资源化利用困难等问题。因此,急需寻求赤泥脱碱的有效方法和新途径。微生物脱碱法因其经济有效、无二次污染的特点而备受关注。本文利用巨大芽孢杆菌菌液对赤泥脱碱,通过高效液相色谱(HPLC)、XRD、SEM-EDS和FT-IR分别对细菌代谢产物、脱碱前后矿物的物相组成、微观形貌和官能团结构进行分析,研究了巨大芽孢杆菌对赤泥脱碱的作用机制。结果表明:在菌量为5.67×10^(13)CFU/mL、液固比为25(mL/g)和温度为35℃的条件下可将脱碱样品的pH值降低至8.55,10 d的单次脱碱率达到30.4%,比无菌添加时的pH值降低了1.48,脱碱率提高22.6%;脱碱后赤泥中方钠石、钙霞石等碱性矿物的衍射峰强度减弱,方解石的衍射峰强度增强,赤泥表面有菌株附着,并出现明显的溶蚀形貌,一些碱性矿物的铝硅酸盐结构被溶解;巨大芽孢杆菌主要利用代谢产生的两种含量较高的有机酸(苹果酸和丙酸)与赤泥中的碱性物质发生酸碱中和,实现对赤泥的脱碱。

关键词：赤泥脱碱巨大芽孢杆菌有机酸作用机制

Extraction of scandium from red mud by acid leaching with CaF2 and solvent extraction with P507

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Journal of Rare Earths 2020年第9期38卷 1003-1008,I0004页

作者： xiaobo zhu Wang Li Baolin Xing Yude Zhang College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China

The extraction of Sc by acid leaching with CaF2 and solvent extraction with P507 from red mud was proposed.The influence of acid leaching and solvent extraction on recovery of Sc was investigated.The CaF2 can obviously improve the leaching efficiency of Sc and reduce the acid consumption.The leaching efficiency of Sc increases from 74%to 92%and the dosage of acid reduces under suitable conditions by adding 5%CaF2.The minerals in red mud can easily be decomposed and leached into the acid solution with CaF2 through analysis of XRD pattern.The particles of red mud become smaller and multihole.The Sc can be selectively extracted with 10%P507 at the pH value of 0.1 from the acid leaching solution.More than 98%of Sc and less than 10%of Al and Fe are extracted.The SC2O3 with purity of 99%is obtained after the process of reverse extraction with NaOH,H2SO4 dissolution,precipitation by oxalic acid and roasting at 750℃.

关键词： Sc CaF2 Acid leaching Solvent extraction Red mud Rare earths

Superconducting quantum computing: a review

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Science China(Information Sciences) 2020年第8期63卷 59-90页

作者： He-Liang HUANG Dachao WU Daojin FAN xiaobo zhu Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Shanghai Branch CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum PhysicsUniversity of Science and Technology of China

Over the last two decades, tremendous advances have been made for constructing large-scale quantum computers. In particular, quantum computing platforms based on superconducting qubits have become the leading candidate for scalable quantum processor architecture, and the milestone of demonstrating quantum supremacy has been first achieved using 53 superconducting qubits in 2019. In this study, we provide a brief review on the experimental efforts towards the large-scale superconducting quantum computer,including qubit design, quantum control, readout techniques, and the implementations of error correction and quantum algorithms. Besides the state of the art, we finally discuss future perspectives, and which we hope will motivate further research.

关键词： quantum computing superconducting quantum computing quantum bit quantum algorithm qubit design qubit control qubit readout

12 superconducting qubits for quantum walks

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Frontiers of physics 2019年第6期14卷 1-2页

作者： Heng Fan xiaobo zhu Institute of Physics Beijing National Laboratory for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100190China Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaShanghai 201315China

Superconducting qubits are among the most promising candidates to build a quantum computer,which is beyond the current computers[1].Presently,the number of qubits for a superconducting quantum processor are around the... 详细信息

关键词： quantum qubit superconducting