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Making connections with cell surface auxin signaling

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Molecular Plant 2024年第4期17卷 522-524页

作者： Angus S.Murphy University of Maryland College ParkMDUSA

The discovery and characterization of the nuclear AUX-indole-3-acetic acid(IAA)-TIR1/AFB auxin co-receptor complex in the model plant Arabidopsis at the outset of the 21st century was a hallmark event in biological science.Two decades of subsequent discovery demonstrated the central role of the nuclear auxin perception mechanism in virtually every stage of Viridiplantae development.Nuclear auxin receptors were also shown to be essential for later stages of differential hypocotyl,coleoptile,and root tropisms,but the most rapid responses were found to persist in Arabidopsis mutants lacking important components of the receptor mechanism(Napier,2021;Peer and Murphy,2022).In particular,rapid cellular elongation observed in tropic growth or after experimental application of auxin is mediated by H+extrusion across the plasma membrane(PM).The resulting apoplastic acidification activates extensin proteins that loosen cell walls to allow for turgor-driven cellular elongation.These initial events occur in a time frame that precludes nuclear signaling and now can be clearly attributed to a cell surface auxin co-receptor complex and downstream signaling intermediaries.

关键词： Arabidopsis surface walls

Disentangling distinct Cu surface sites for electrocatalytic CO_(2)-to-CO and CO-to-C_(2+)conversion

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Science China Chemistry 2024年第4期67卷 1047-1048页

作者： Kun Jiang Wen-Bin Cai Interdisciplinary Science Research Centre School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Collaborative Innovation Center of Chemistry for Energy MaterialsDepartment of ChemistryFudan UniversityShanghai 200438China

Electrochemical CO_(2)reduction reaction(CO_(2)RR)is a promising strategy to curb anthropogenic carbon emissions,for which intermittent renewable electricity could be stored as chemical energy within carbon-based fuel... 详细信息

关键词： carbon Electrochemical surface

A Natural Catalytic Converter^® for Continuously Inactivating Air and surface Pathogens with More Effect than Ventilation and Filtration

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Open Journal of Applied Sciences 2024年第5期14卷 1353-1363页

作者： Margaret Scarlett Brett Duffy CAPT. (Ret.) US Public Health Service Centers for Disease Control and Prevention Atlanta GA United States of America ASHRAE (62.1 Standard Committee) Atlanta GA United States of America

Study Objective: The purpose of the study is to present independent laboratory testing for a novel technology in air and on surfaces. Since 2020, public health goals have focused on improving indoor air quality. This includes protection from airborne pathogens, such as tuberculosis, RSV, SARS-CoV-2, common cold or influenza viruses, measles, and others. Engineering controls are highly effective at reducing hazardous pathogens found in indoor air and from recontamination of surfaces. This occurs from a continuous cycle of settling of small, sustained airborne pathogens, which may become dehumidified, becoming airborne again, carried by room air currents around indoor spaces, then repeating the cycle. Methods: The novel technology utilizes a catalytic process to produce safe levels of hydrogen peroxide gas that are effective in reducing pathogens in the air and on surfaces. Air testing was performed with the MS2 bacteriophage, the test organism for ASHRAE standard 241, and methicillin-Resistant Staphylococcus aureus (MRSA). surface testing was performed with SARS-COV-2 (Coronavirus COVID-19) and H1N1 (Influenza). Typical ventilation and filtration does not effectively remove disbursed pathogens from the entire facility, due to inconsistent air circulation and surface deposits of pathogens. Results: MS2 was reduced by 99.9%;MRSA was reduced by 99.9%;SARS-CoV-2 was reduced by 99.9%;H1N1 was reduced by 99.9%. Conclusion: This novel catalytic converter reduces a variety of pathogens in the air (99%) and on surfaces (99%), by actively disinfecting with the introduction of gaseous hydrogen peroxide. This active disinfection provides a strong solution for protecting the entire facility and its occupants.

关键词： Pathogen Bacteria Virus Reduction Gaseous Hydrogen Peroxide Disinfection Indoor Air Quality surface

Evaluating the historical,clinical,and cultural value of the Tian Hui Yi Jian

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Journal of Traditional Chinese Medicine 2024年第1期44卷 220-221页

作者： YU Linyong GU Man China Academy of Chinese Medical Sciences Beijing 100700China Institute for History of Medicine and Medical Literature China Academy of Chinese Medical SciencesBeijing 100700China

Tian Hui Yi Jian was compiled by the Tianhui Medical Manuscripts Compilation Group,which includes scholars from the Institute for History of Medicine and Medical Literature of the China Academy of Chinese Medical Sciences(CACMS),Chengdu University of Traditional Chinese Medicine,Chengdu Institute of Cultural Relics and Archaeology,and Jingzhou Cultural Relics Protection Center.It was published by the Cultural Relics Press in November 2022.The volume includes images of eight medical manuscripts,along with the Team's annotations,and photographs of a lacquered figurine with meridian-channels and words on its surface.

关键词： surface Chengdu Tian

A Simple Proof of ACC for Minimal Log Discrepancies for surfaces

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Acta Mathematica Sinica,English Series 2024年第2期40卷 425-434页

作者： Jing Jun HAN Yu Jie LUO Shanghai Center for Mathematical Sciences Fudan UniversityJiangwan CampusShanghai 200438P.R.China Department of Mathematics Johns Hopkins UniversityBaltimoreMD 21218USA

Following Shokurov's idea,we give a simple proof of the ACC conjecture for minimal log discrepancies for surfaces.

关键词： Ascending chain condition minimal log discrepancies minimal model program surface

面向碱性析氢反应的原子级优化Fe-Pt金属间化合物催化剂表面终结态探索

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Science Bulletin 2024年第8期69卷 1091-1099页

作者：梁庆孟繁玲李文文邹旭宋可心葛昕姜周刘玉华刘美琦李振宇董韬文陈中军张伟郑伟涛 Key Laboratory of Automobile Materials(Ministry of Education) School of Materials Science and EngineeringElectron Microscopy CenterInternational Center of Future ScienceJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchun 130012China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Controlling the atomic arrangement of elemental atoms in intermetallic catalysts to govern their surface and subsurface properties is a crucial but challenging endeavor in electrocatalytic reactions.In hydrogen evolution reaction(HER),adjusting the d-band center of the conventional noble-metallic Pt by introducing Fe enables the optimization of catalytic performance.However,a notable gap exists in research on the effective transition from disordered Fe/Pt alloys to highly ordered intermetallic compounds(IMCs)such as FePt_(3)in the alkaline HER,hampering their broader application.In this study,a series of catalysts FePt_(3-x)H(x=5,6,7,8 and 9)supported on carbon nanotubes(CNTs)were synthesized via a simple impregnation method,along with a range of heat treatment processes,including annealing in a reductive atmosphere,to regulate the order degree of the arrangement of Fe/Pt atoms within the FePt_(3)catalyst.By using advanced microscopy and spectroscopy techniques,we systematically explored the impact of the order degree of FePt_(3)in the HER.The as-prepared FePt_(3)-8H exhibited notable HER catalytic activity with low overpotentials(η=37 mV in 1.0 mol L^(-1)KOH)at j=10 mA cm^(-2).The surface of the L1_(2)FePt_(3)-8H catalyst was demonstrated to be Pt-rich.The Pt on the surface was not easily oxidized due to the unique Fe/Pt coordination,resulting in significant enhancement of HER performance.

关键词： Intermetallic Hydrogen evolution reaction surface Catalyst

surface structure change properties:Auto-soft bionic fibrous membrane in reducing postoperative adhesion

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Bioactive Materials 2022年第6期7卷 16-29页

作者： Shanshan Xu Chenhong Wang Ruoqing Mao Xiaoyu Liang Heran Wang Zhenyu Lin Jiangxue Li Shilin Li Jipeng Jiang Tongshuo Zhang Yongfu Ma Yang Liu Charles C.Han Ying Liu Institute for Advanced Study Shenzhen UniversityShenzhen518060China State Key Laboratory of Polymer Physics and Chemistry Joint Laboratory of Polymer Science and MaterialsBeijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety&CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology of ChinaBeijing100190China State Key Laboratory of Veterinary Etiological Biology National Foot and Mouth Diseases Reference LaboratoryKey Laboratory of Animal Virology of Ministry of AgricultureLanzhou Veterinary Research InstituteChinese Academy of Agricultural SciencesLanzhouGansu730070China Department of Thoracic Surgery Chinese PLA General HospitalBeijing100853PR China Department of Clinical Laboratory and Pathology Jiangsu Provincial Corps Hospital of Chinese People’s Armed Police ForceYangzhouJiangsu225003PR China GBA National Institute for Nanotechnology Innovation Guangdong510700China

Peritoneal adhesion is the most common adverse effect following abdominal surgery or inflammation.The occurrence in clinical trials has been successfully reduced using barriers.However,the shortcomings of frequently used adhesion barriers,such as rapid degradation rate of gel barrier and inadequate operation ability of solid barrier,cannot be ignored.In this study,a fibrous membrane with an ECM-like structure was prepared.The adhesion properties were reduced significantly by changing the surface structure.The fibrous membrane caused less inflammatory response and much less peripheral adhesion and intestinal obstruction compared to the casting film and the commercial film with smooth surface,though with the same components.Because of the auto-soft bionic structure and similarity in the mechanical modulus of the tissues,the fibrous membrane was more flexible when it adhered to the tissues,showed excellent effectiveness and biocompatibility.In addition to the rat and miniature pig models,a randomized,placebo-controlled,and multicenter clinical pilot study with 150 patients confirmed that because of its flexibility,biodegradability,and similarity to mechanical modulus and structure with tissues involved,the fibrous membrane served as a favorable implant for preventing post-operation adhesion.

关键词： Fibrous membrane Anti-adhesion surface Electrospun Biocompatibility

Unveiling bulk and surface radiation forces in a dielectric liquid

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Light(Science & Applications) 2022年第5期11卷 925-934页

作者： N.G.C.Astrath G.A.S.Flizikowski B.Anghinoni L.C.Malacarne M.L.Baesso T.Požar M.Partanen I.Brevik D.Razansky S.E.Bialkowski Department of Physics Universidade Estadual de MaringáMaringáPRBrazil Faculty of Mechanical Engineering University of LjubljanaLjubljanaSlovenia Department of Electronics and Nanoengineering Aalto UniversityAaltoFinland Department of Energy and Process Engineering Norwegian University of Science and TechnologyTrondheimNorway Institute for Biomedical Engineering and Institute of Pharmacology and Toxicology Faculty of MedicineUniversity of ZurichZurichSwitzerland Institute for Biomedical Engineering Department of Information Technology and Electrical EngineeringETH ZurichZurichSwitzerland Department of Chemistry and Biochemistry Utah State UniversityLoganUTUSA

Precise control over light-matter interactions is critical for many optical manipulation and material characterization methodologies,further playing a paramount role in a host of nanotechnology applications.Nonetheless,the fundamental aspects of interactions between electromagnetic fields and matter have yet to be established unequivocally in terms of an electromagnetic momentum density.Here,we use tightly focused pulsed laser beams to detect bulk and boundary optical forces in a dielectric fluid.From the optical convoluted signal,we decouple thermal and nonlinear optical effects from the radiation forces using a theoretical interpretation based on the Microscopic Ampère force density.It is shown,for the first time,that the time-dependent pressure distribution within the fluid chiefly originates from the electrostriction effects.Our results shed light on the contribution of optical forces to the surface displacements observed at the dielectric air-water interfaces,thus shedding light on the long-standing controversy surrounding the basic definition of electromagnetic momentum density in matter.

关键词： dielectric momentum surface

Effects of surface grinding for scratched alloy 690TT tube in PWR nuclear power plant:Microstructure and stress corrosion cracking

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Journal of Materials Science & Technology 2022年第18期113卷 229-245页

作者： Bin Wu Hongliang Ming Fanjiang Meng Yifeng Li Guangqing He Jianqiu Wang En-Hou Han 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 Shanghai Nuclear Engineering Research and Design Institute Ltd.Co. Shanghai 200233China Instrumental Analysis and Research Center Shanghai UniversityShanghai 200444China Department of Materials Science Fudan UniversityShanghai 200433China Shanghai Electric Nuclear Power Equipment Co. Ltd.Shanghai 201306China

Alloy 690TT tube samples with different scratch depths were repaired by grinding treatments using abra-sive papers of two different particle sizes.The microstructure and stress corrosion cracking(SCC)behavior were studied in detail.During grinding,the plastic accumulation zone vulnerable to SCC was removed.Meanwhile,some residual slip steps remained in the scratched area.Corrosion tests lasting 1000,2000,3000,and 4000 h show that the sensitivity and risk of SCC in the scratched area are decreased by grind-ing.Treatment using abrasive particles of a smaller size is more effective.Nevertheless,deep scratches remained hazardous even after the grinding.

关键词： Alloy 690TT Scratch surface Stress corrosion High temperature corrosion Intergranular corrosion