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Cellulosomal hemicellulases:Indispensable players for ensuring effective lignocellulose bioconversion

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Green carbon 2024年第1期2卷 57-69页

作者： Min Xiao Ya-Jun Liu Edward A.Bayer Akihiko Kosugi Qiu Cui Yingang Feng CAS Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Provincial Key Laboratory of Synthetic Biology Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Engineering Laboratory of Single Cell Oil Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Shandong Energy institute Qingdao 266101China Qingdao new Energy Shandong Laboratory Qingdao 266101China University of Chinese Academy of Sciences Beijing 100049China Department of Biomolecular Sciences The Weizmann Institute of ScienceRehovot 7610001Israel Department of Life Sciences and the National institute for Biotechnology in the Negev Ben-Gurion University of the NegevBeer-Sheva 8499000Israel Biological Resources and Post-harvest Division Japan International Research Center for Agricultural Sciences(JIRCAS)1-1 OhwashiTsukubaIbaraki 305-8686Japan

The bioconversion of lignocellulose has attracted global attention,due to the significant potential of agricultural and forestry wastes as renewable zero-carbon resources and the urgent need for substituting fossil *** cellulosome system is a multi-enzyme complex produced by anaerobic bacteria,which comprises cellulases,hemicellulases,and associated enzymatic and non-enzymatic components that promote biomass *** enhance their efficiency in degrading recalcitrant lignocellulosic matrices,cellulosomes have been employed to construct biocatalysts for lignocellulose bioconversion,such as consolidated bioprocessing and consolidated ***,the second most abundant polysaccharides in plant cell walls,hold valuable application potential but can also induce inhibitory effects on cellulose hydrolysis,thus highlighting the indispensable roles of hemicellulases within the cellulosome *** review evaluated current research on cellulosomal hemicellulases,comparing their types,abundance,and regulation,primarily focusing on eight known cellulosome-producing species of different *** also reviewed their growth conditions,their hemicellulose-degrading capabilities,and the inhibitory effects of hemicellulose on cellulosome-based lignocellulose ***,we proposed strategies for targeted enhancement of hemicellulase in cellulosomes to improve lignocellulose bioconversion in future studies.

关键词： Cellulosome Lignocellulose Hemicellulase Saccharification Biocatalyst

纳米磁学中交换耦合的物理机制、微磁学模拟、合成和生物医学应用（英文）

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Science China materials 2024年

作者：唐玉婷冯峰徐冠华秦世杰欧阳晓平姚立王秀瑜 institute of Process Equipment College of Energy Engineering Zhejiang University State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Academy of Sciences CAS Research/Education Center for Excellence in Molecular Sciences University of Chinese Academy of Sciences

纳米磁学中的磁交换耦合是一个迅速发展的新兴领域.通过调控磁交换耦合相互作用,磁性纳米系统能够超越其尺寸依赖的磁学行为限制,展现出更优越的磁学性能.理解交换耦合机制及其对宏观磁学性能的影响,对磁性材料的设计和应用至关重要.本...

纳米磁学中的磁交换耦合是一个迅速发展的新兴领域.通过调控磁交换耦合相互作用,磁性纳米系统能够超越其尺寸依赖的磁学行为限制,展现出更优越的磁学性能.理解交换耦合机制及其对宏观磁学性能的影响,对磁性材料的设计和应用至关重要.本文总结了核-壳磁性纳米颗粒的研究进展,重点阐释了在不同磁性模式之间磁交换耦合的机制,剖析了微观磁结构与宏观磁学特性的磁构关系.总结了核-壳磁性纳米颗粒的合成方法(一步法和两步法),并讨论了其在磁共振成像、磁热疗、靶向药物运输和神经调控方面的潜在应用,提出了未来可能的发展方向.

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Crystal phase control and ignition properties of HNS/CL-20 composite microspheres prepared by microfluidics combined with emulsification techniques

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Particuology 2024年第2期85卷 241-251页

作者： Yi Liu Yunyan Guo Rui Zhu Jinqiang Zhou Zhengxu Lin Kai Han Chongwei An Jingyu Wang Bidong Wu School of Environment and Safety Engineering North University of ChinaTaiyuan030051China School of Engineering Beijing Institute of TechnologyBeijing100081China Shanxi Province Ultrafine Powder Engineering Technology Research Center Taiyuan030051China

Improved controllability and energy density of ignition agents are of great significance for the devel-opment of energetic composite *** this study,droplet microfluidics and emulsification tech-niques were combined to prepare HNS/CL-20 composite microspheres with polyglycidyl azide polymer(GAP)as the *** influence of binder content on the morphology of microspheres was investi-gated,and the microspheres were characterized and tested for particle size,crystal structure,thermal decomposition,dispersibility,mechanical sensitivity,combustion behavior and detonation *** results showed that microspheres prepared with a binder content of 3%had higher sphericity and particle size *** microspheres retained the crystal structure of both HNS and CL-20(ε-type).Compared with raw HNS,the microspheres had higher apparent activation energy,better safety per-formance,and good *** ignition experiments and detonation performance tests show that HNS/CL-20 composite microspheres have excellent ignition performance,obvious combustion flame,and significant energy release effects,which are expected to achieve high energy and high-speed response of the igniter,thus improving the ignition reliability in special environments or systems.

关键词： Droplet microfluidics Emulsification technology Energetic materials Composite microspheres Crystal phase control Ignition

Effect of surface damage induced by cavitation erosion on pitting and passive behaviors of 304L stainless steel

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International Journal of Minerals,Metallurgy and materials 2023年第7期30卷 1338-1352页

作者： Liang Li Yanxin Qiao Lianmin Zhang Aili Ma Enobong Felix Daniel Rongyao Ma Jian Chen Yugui Zheng School of materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China CAS Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenyang National Research Center for materials Science Institute of MetalsChinese Academy of SciencesShenyang 110016China

The corrosion behavior of 304L stainless steel(SS)in 3.5wt%NaCl solution after different cavitation erosion(CE)times was mainly evaluated using electrochemical noise and potentiostatic polarization *** was found that the antagonism effect resulting in the passivation and depassivation of 304L SS had significant distinctions at different CE *** passive behavior was predominant during the incubation period of CE where the metastable pitting initiated at the surface of 304L *** the rising period of CE,the 304L SS experienced a transition from passivation to depassivation,leading to the massive growth of metastable pitting and stable *** depassivation of304L SS was found to be dominant at the stable period of CE where serious localized corrosion occurred.

关键词： cavitation erosion pitting stainless steel electrochemical noise

Dual-phase synergistic deformation characteristics and strengthening mechanism of AlCoCrFeNi_(2.1) eutectic high entropy alloy fabricated by laser powder bed fusion

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Journal of materials Science & Technology 2023年第19期150卷 75-85页

作者： Xu Tang Hao Zhang Zhengwang Zhu Peng Xue Lihui Wu Fengchao Liu Dingrui Ni Bolv Xiao Zongyi Ma Shi-changxu Innovation Center for Advanced materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Eutectic high entropy alloy(EHEA)possesses promising prospects for industrial application due to its controllable and near-equilibrium dual-phase *** to the advantages of high material utiliza-tion,efficient production,and design freedom,the laser powder bed fusion(LPBF)technique provides a new path to prepare EHEA components with complex structure and excellent *** this study,near fully dense AlCoCrFeNi_(2.1) samples were obtained by adjusting the process parameters of ***-sidering the balling phenomenon and powder splashing during the LPBF process,laser remelting was selected as an optimized scanning strategy to further improve the forming quality of *** microstructure of remelted AlCoCrFeNi_(2.1) sample exhibited regular eutectic lamellae consisting of nano-scale face-centered-cubic(FCC)and B2 phases,in which the FCC phase accounted for a higher *** investigating the tensile behavior and deformation mechanism,it was revealed that the ultrafine eu-tectic lamellae could induce a strong dual-phase synergistic strengthening,thereby significantly improv-ing the strength of the *** with the vacuum induction melted(VIM)sample,the remelted sample showed a 54%increase in ultimate tensile strength(UTS-1518 MPa)and a 130%increase in yield strength(YS-1235 MPa)with reasonable *** study indicates that by combining the design and manufacturing freedom of LPBF with the EHEA,it is expected to fabricate high-property 3D EHEA parts,expanding the application field of EHEA.

关键词： Laser powder bed fusion Remelting Eutectic high entropy alloy Microstructure Deformation mechanism

Delayed Fluorescence and Amplified Chirality via Modified Substitution Position for Deep-red Circularly Polarized Organic Light Emitting-diodes

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Chemical Research in Chinese Universities 2024年第4期40卷 657-663页

作者： ZHU Lixun LIU Dan WU Kaiwen XIE Guohua ZHAO Zheng TANG Ben Zhong School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen518172P.R.China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyHongkong999077P.R.China The institute of Flexible Electronics(Future Technologies) Xiamen UniversityXiamen361005P.R.China

Developing easily accessible deep-red/near-infrared circularly polarized emitters for practical organic light-emitting diodes remains a significant ***,a practical strategy has been proposed for developing deep-red circularly polarized delayed fluorescent emitters based on a novel chiral acceptor *** changing triphenylamine(TPA)substitution position from para to meta,R/S-M-TBBTCN demonstrated thermally activated delayed fluorescence(TADF)properties with a delayed lifetime of 6.6µs that R/S-P-TBBTCN doesn’t ***,R/S-M-TBBTCN showed a 65 nm red-shift in emission and a 10-fold enhancement in asymmetry factor(glum),compared with R/*** solution-processed nondoped circularly polarized organic light-emitting diodes(CP-OLEDs)based on R-M-TBBTCN display deep-red emission and 2.2%external quantum efficiency.

关键词： Amplified chirality Deep-red circularly polarized organic light emitting-diode Binaphthol based chiral acceptor

A customized strategy to design intercalation-type Li-free cathodes for all-solid-state batteries

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National Science Review 2023年第3期10卷 189-202页

作者： Da Wang Jia Yu Xiaobin Yin Sen Shao Qianqian Li Yanchao Wang Maxim Avdeev Liquan Chen Siqi Shi School of materials Science and Engineering Shanghai University Zhejiang Laboratory materials Genome institute Shanghai University State Key Laboratory of Superhard materials& International Center for Computational Method and Software Jilin University Australian Nuclear Science and Technology Organisation School of Chemistry University of Sydney institute of Physics Chinese Academy of Sciences

Pairing Li-free transition-metal-based cathodes(MX) with Li-metal anodes is an emerging trend to overcome the energy-density limitation of current rechargeable Li-ion ***,the development of practical Li-free MX cathodes is plagued by the existing notion of low voltage due to the long-term overlo oked voltage-tuning/phase-stability ***,we propose a p-type alloying strategy involving three voltage/phase-evolution stages,of which each of the varying trends are quantitated by two improved ligand-field descriptors to balance the above *** this,an intercalation-type 2H-V1.75Cr0.25S4cathode tuned from layered MX2family is successfully designed,which possesses an energy density of 554.3 Wh kg-1at the ele ctrode level accompanied by interfacial compatibility with sulfide solid-state ele *** propos al of this class of materials is expected to break free from scarce or high-cost transition-metal(*** and Ni) reliance in current commercial *** experiments further confirm the voltage and energy-density gains of *** strategy is not limited to specific Li-free cathodes and offers a solution to achieve high voltage and phase stability simultaneously.

关键词： intercalation-type Li-free cathodes all-solid-state Li-metal batteries energy density p-type alloying strategy ligand-field descriptors

Static spheroidization and its effect on superplasticity of fine lamellae in nugget of a friction stir welded Ti-6Al-4V joint

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Journal of materials Science & Technology 2022年第24期119卷 1-10页

作者： C.L.Jia L.H.Wu P.Xue H.Zhang D.R.Ni B.L.Xiao Z.Y.Ma Shi-Changxu Innovation Center for Advanced materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

The spheroidization of the lamellar structure can greatly contribute to the superplasticity of the nugget zone(NZ)of Ti alloy welds,which is the key to achieve the integral superplastic forming of welds for the fabrication of large-scale complex ***,the spheroidization process is complex and costly since it cannot be obtained generally,unless the lamellae suffers from a large *** this study,the static spheroidization was achieved for the fine lamellae structure in the nugget of a friction stir welded(FSW)Ti-6Al-4V joint,particularly by the annealing without any *** specialα/βinterface obeying a Burgers orientation relationship(BOR)after FSW was first time directly observed,whose effect on the spheroidization was discussed.A new static spheroidization mechanism with the gradual coalescence of the adjacent lamellae was discovered,which we named as“termination coalescence”.There was a slower coarsening rate in the lamellar structure than in the classical equiaxed one,due to the BOR in the lamellae,although both of them exhibited a volume diffusion character during ***,the similar superplasticity can be achieved for the base material and NZ after *** study can provide a new way to the spheroidization and a theoretical basis for the integral superplastic forming of welds during production.

关键词： Friction stir welding Titanium alloys Spheroidization mechanism Coalescence Superplasticity Static annealing

Bi-doped carbon quantum dots functionalized liposomes with fluorescence visualization imaging for tumor diagnosis and treatment

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Chinese Chemical Letters 2024年第4期35卷 414-419页

作者： Peide Zhu Yangjia Liu Yaoyao Tang Siqi Zhu Xinyang Liu Lei Yin Quan Liu Zhiqiang Yu Quan Xu Dixian Luo Juncheng Wang State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China Department of Laboratory Medicine Dongguan Institute of Clinical Cancer ResearchAffiliated Dongguan HospitalSouthern Medical UniversityDongguan 523058China Department of Laboratory Medicine Huazhong University of Science and Technology Union Shenzhen Hospital(Nanshan Hospital)Shenzhen 518052China institute of Stomatology First Medical CenterChinese PLA General HospitalBeijing 100853China

Liposomes are one of the significant classes of antitumor nanomaterials and the most successful nanomedicine drugs in clinical translation. However, it is difficult to accurately reveal liposome delivery modes and drug release rates at different p H values to assess the biodistribution and drug delivery pathways in vivo. Here, we established a strategy to integrate Bi-doped carbon quantum dots(CQDs)with liposomes to produce fluorescence visualization and therapeutic effects, namely lipo/Bi-doped ***/Bi-doped CQDs show good water solubility and physicochemical properties, which can be used for in vitro labeling of colon cancer(CT26) cells and in vivo imaging localization tracking tumors for monitoring. Simultaneously, thanks to the excellent p H sensitivity and ion doping characteristic of Bi-doped CQDs, lipo/Bi-doped CQDs can be used to reveal the drug release rate of liposomes at different p H values and exhibit potential effects in vivo antitumor therapy.

关键词： Bi-doped CQDs Lipo/Bi-doped CQDs pH sensitivity In vitro/in vivo imaging Diagnosis and treatment integration