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Food Science and Human wellness 2024年第4期13卷 2317-2326页

作者： Hang Gao Jian Zhang Li Liu Lijun Fu yan Zhao Germán Mazza Xin Zhang Beijing Academy of Food Sciences 100068 BeijingChina Institute for Research and Development in Process Engineering Biotechnology and Alternative Energies(PROBIENCONICET-UNCo)8300 NeuquénArgentina

Free amino acid(FAA)is the important component of vinegar that infl uences quality perception and consumer *** is one of the major metabolites produced by microorganisms;however,the microbial metabolic network on FAA biosynthesis remains *** metagenomic analysis,this work aimed to elucidate the roles of microbes in FAA biosynthesis during Monascus rice vinegar *** profiles from functional analyses showed 14 dominant genera with high contributions to the metabolism *** metabolic network for FAA biosynthesis was then constructed,and the microbial distribution in different metabolic pathways was *** results revealed that 5 functional genera were closely involved in FAA *** study illuminated the metabolic roles of microorganisms in FAA biosynthesis and provided crucial insights into the functional attributes of microbiota in vinegar fermentation.

关键词： Monascus rice vinegar Metagenomic analysis Free amino acid synthesis Metabolic pathway Microbial distribution

Ultra-flexible all-in-one anti-freeze photothermally enhanced supercapacitors

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nano Research 2024年第8期17卷 7221-7229页

作者： Yongxin Lu Keke Li yan-yan Song Zhida Gao Condense matter of physics College of ScienceNortheazistern UniversityShenyang 110004China

wearable electronics powered by flexible energy storage devices have captured global *** low-temperature conditions,unfortunately,solidification of flexible hydrogel electrolyte and decreased pseudo-capacity of these devices largely hamper their practical *** this study,photothermally-active Prussian blue(PB)was introduced onto poly(3,4-ethylenedioxythiophene)/polyacrylamide(PEDOT/PAM)networks to address the challenges of electrolyte solidification and degraded pseudo-capacitance for flexible all-in-one device at low *** as-constructed PB/PEDOT/PAM hydrogel device delivers stable electrochemical performance and remarkable mechanical property with 1652%***,this hydrogel device well retains its flexibility in cold environment with a freezing point below−30℃.The incorporation of PB extends the voltage range to 1.5 V as a single device,thus significantly enhancing the electrochemical performance as an all-inone integrated *** from the outstanding photo-to-thermal conversion ability of embedded PB nanocubes,the temperature of the assembled all-in-one PB/PEDOT/PAM device increased from^(−2)0 to 17.7℃ after solar-light irradiation for only 5 ***,the degraded pseudo-capacitance was subsequently boosted to 287.1%of its original capacitance at−20℃.This study establishes a connection between flexible all-solid-state hydrogel devices and photothermally enhanced pseudocapacitors in freezing environments,thereby expanding the potential applications of multi-functional pseudo-capacitors.

关键词： all-in-one energy storage devices all-solid-state photothermal flexible low temperatures

Isotopic dependence of the yield ratios of light fragments from different projectiles and their unified neutron skin thicknesses

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nuclear Science and Techniques 2024年第3期35卷 228-236页

作者： Ting-Zhi yan Shan Li School of Energy and Power Engineering Northeast Electric Power UniversityJilin 132012China

The yield ratios of neutron-proton(R(n/p))and^(3)H-^(3)He(R(^(3)H∕^(3)He))with reduced rapidity from 0 to 0.5 were simulated at 50 MeV/u even-even ^(36−56)Ca+^(40)Ca,even-even ^(48−78)ni+^(58)ni,and ^(100−139)Sn(every third isotopes)+112 Sn for full reduced impact parameters using the isospin-dependent quantum molecular dynamics(IQMD)*** neutron and proton density distributions and root-mean-square radii of the reaction systems were obtained using the Skyrme-Hartree-Fock model,which was used for the phase space initialization of the projectile and target in *** defined the unified neutron skin thickness asΔRnp=^(1∕2) n−^(1∕2)p,which was negative for neutron-deficient *** unifiedΔRnp values for nuclei with the same relative neutron excess from different isotopic chains were nearly equal,except for extreme neutron-rich isotopes,which is a type of scaling *** yield ratios of the three isotopic chain-induced reactions,which depended on the reduced impact parameter and unified neutron skin thickness,were *** results showed that both R(n/p)and R(^(3)H∕^(3)He)decreased with a reduced impact parameter for extreme neutron-deficient isotopes;however,they increased with reduced impact parameters for extreme neutron-rich isotopes,and increased with theΔRnp of the projectiles for all reduced impact *** addition,a scaling phenomenon was observed betweenΔR np and the yield ratios in peripheral colli-sions from different isotopic chain projectiles(except for extreme neutron-rich isotopes).Thus,R(n/p)and R(^(3)H∕^(3)He)from peripheral collisions were suggested as experimental probes for extracting the neutron or proton skin thicknesses of non-extreme neutron-rich nuclei from different isotopic chains.

关键词： Exotic nuclei Unified neutron skin thickness Yield ratios IQMD

Theoretical screening of cooperative n-bridged dual-atom sites for efficient electrocatalytic nitrogen reduction with remolding insight

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nano Research 2024年第4期17卷 3413-3422页

作者： Huimei Chen yan yang Chi Jiao Zhiw.n Zhuo Junjie Mao yan Liu Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China

The electrocatalytic nitrogen reduction reaction(e-nRR)is a promising alternative method for the Haber–Bosch ***,it still faces many challenges in searching for high activity,stability,and selectivity catalysts and ascertaining the catalytic mechanism with complete ***,a series of graphene-based n-bridged dual-atom catalysts(M1-n-M2/nC)are systematically investigated via first-principle calculation and a high-throughput screening *** result unveils that n_(2) adsorption on M1-n-M2/nC in bridge-on adsorption mode can effectively break the scaling relationship on single-atom catalysts(SACs).Moreover,V-n-Ru/nC and V-n-Os/nC are systematically screened out as promising e-nRR catalysts,with extremely low limiting potentials of-0.20 and-0.18 V,***,the adsorption site competition between*n_(2) and*H,as well as the competitive tw.n reactions of hydrogen evolution reaction(HER)on intermediates(n_(n)H_(m))during the e-nRR process,is systematically evaluated to form a remodeling insight for the reactions in mechanism,and the e-nRR of new proposed dual-atom catalysts(DACs)is strategically optimized for its high-efficiency performance potential via our remolding insight in e-nRR *** work provides new ideas and insights for the design and mechanism of e-nRR catalysts and an effective strategy for rapidly screening highly efficient e-nRR catalysts.

关键词： nitrogen reduction dual-atom catalysts high-throughput screening hydrogen evolution reaction density functional theory calculations

LncRnA PCGEM1 facilitates cervical cancer progression via miR-642a-5p/KIF5B axis

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Oncology Research 2024年第7期32卷 1221-1229页

作者： YUAnLIn LIU yan LIU yan w.nG QIAnG w.nG yan yan DAnDAn ZHAnG HUIQIn LIU Department of Obstetrics and Gynecology Shanghai First Maternity and Infant HospitalSchool of MedicineTongji UniversityShanghai200092China Department of Obstetrics and Gynecology The Second People’s Hospital of Nantong CityNantong226002China Department of Obstetrics and Gynecology Affiliated Hospital of Nantong UniversityNantong226002China

At present,the role of many long non-coding RnAs(lncRnAs)as tumor suppressors in the formation and development of cervical cancer(CC)has been ***,lncRnA prostate cancer gene expression marker 1(PCGEM1),whose high expression not only aggravates ovarian cancer but also can induce tumorigenesis and endometrial cancer progression,has not been studied in *** objective of this study was to investigate the expression and the underlying role of PCGEM1 in *** relative expression of PCGEM1 in CC cells was detected by real-time *** the suppression of PCGEM1 expression by shRnA,the changes in the proliferation,migration,and invasion capacities were detected via CCK-8 assay,EdU assay,and colony formation assay wound healing *** assay and the changes in expressions of epithelial-to-mesenchymal transition(EMT)markers were determined by western blot and immunoﬂ*** interplay among PCGEM1,miR-642a-5p,and kinesin family member 5B(KIF5B)was conﬁrmed by bioinformatics analyses and luciferase reporter *** showed that PCGEM1 expressions were up-regulated within CC *** viabilities,migration,and invasion were remarkably reduced after the suppression of PCGEM1 expression by shRnA in Hela and SiHa cells.n-cadherin was silenced,but E-cadherin expression was elevated by ***,by sponging miR-642a-5p in CC,PCGEM1 was veriﬁed as a competitive endogenous RnA(ceRnA)that modulates KIF5B ***-642a-5p down-regulation partially rescued sh-PCGEM1’s inhibitory effects on cell proliferation,migration,invasion,and EMT *** conclusion,the PCGEM1/miR-642a-5p/KIF5B signaling axis might be a novel therapeutic target in *** study provides a research basis and new direction for targeted therapy of CC.

关键词： Cervical cancer PCGEM1 KIF5B MiR-642a-5p tumorigenesis

SPEED:an integrated,smartphone-operated,handheld digital PCR Device for point-of-care testing

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Microsystems & nanoengineering 2024年第3期10卷 149-158页

作者： Haoqing Zhang Xiaocheng Liu Xinlu w.ng Zhiqiang yan Ying Xu Martina Gaňová TomášŘezníček Marie Korabečná Pavel neuzil Ministry of Education Key Laboratory of Micro and nano Systems for Aerospace School of Mechanical EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’anShaanxi 710072PR China The Key Laboratory of Biomedical Information Engineering of the Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’anShaanxi 710049PR China Bioinspired Engineering and Biomechanics Center(BEBC) Xi’an Jiaotong UniversityXi’an 710049PR China School of Marine Science and Technology Northwestern Polytechnical UniversityXi’anShaanxi 710072PR China Central European Institute of Technology Brno University of TechnologyPurkyňova 12361300 BrnoCzech Republic ITD Tech S.R.O Osvoboditelu100573581 BohumínCzech Republic Institute of Biology and Medical Genetics First Faculty of MedicineCharles University and General University Hospital of PragueAlbertov 412800 PragueCzech Republic

This study elaborates on the design,fabrication,and data analysis details of SPEED,a recently proposed smartphonebased digital polymerase chain reaction(dPCR)*** dPCR chips incorporate partition diameters ranging from 50μm to 5μm,and these partitions are organized into six distinct blocks to facilitate image *** to the superior thermal conductivity of Si and its potential for mass production,the dPCR chips were fabricated on a Si substrate.A temperature control system based on a high-power density Peltier element and a preheating/cooling PCR protocol user interface shortening the thermal cycle *** optical design employs four 470 nm light-emitting diodes as light sources,with filters and mirrors effectively managing the light emitted during *** algorithm is utilized for image processing and illumination nonuniformity correction including conversion to a monochromatic format,partition identification,skew correction,and the generation of an image correction *** validated the device using a range of deoxyribonucleic acid targets,demonstrating its potential applicability across multiple ***,we provide guidance and verification of the design and testing of the recently proposed SPEED device.

关键词： correction smart testing

Simple preparation of C(CS)/g-C_(3)n_(4)/Co carbon aerogel and its catalytic performance for ammonium perchlorate

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Defence Technology（防务技术） 2024年第3期33卷 186-196页

作者： Yujie yan Bo Jin Rufang Peng State Key Laboratory of Environment-friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China

Biomass chitosan(CS)was used as a template,graphitic phase carbon nitride(g-C_(3)n_(4))with high nitrogen content and certain catalytic activity was used as a dopant,and nano-transition metal cobalt(Co)was used as a catalytic center *** carbon aerogel(C(CS)/g-C_(3)n_(4)/Co)with a three-dimensional network-like structure was prepared by assembling the three materials through experimental operations such as freeze-drying and high-temperature *** was demonstrated by scanning and transmission characterization that the CS in the carbon aerogel could provide more active sites for the cobalt nanoparticles,and the doping of graphite-phase carbon nitride as a template dispersed the cobalt nanoparticles and changed the conductivity of the *** investigate the catalytic effect of carbon aerogel on ammonium perchlorate(AP),it was investigated by differential thermal analyzer and TG thermal *** carbon aerogel was very effective in catalyzing AP,and the 10 wt% content of the catalyst reduced the AP pyrolysis peak from 703.9 to 595.5 *** to further investigate the synergistic effect of the three materials,further carbon aerogels such as C(CS)/Co,g-C_(3)n_(4)/Co were prepared and applied to catalyze AP,and the same ratio reduced the AP pyrolysis peak by 98.1℃ and 97.7℃.This result indicates a synergistic effect of the assembly of the three materials.

关键词： g-C_(3)n_(4) Chitosan Co Ammonium perchlorate Pyrolysis kinetics

Mechanocatalysis of CO to CO_(2)on TiO_(2)surface controlled at atomic scale

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nano Research 2024年第7期17卷 5826-5834页

作者： Yuuki Adachi Robert Turanský Ján Brndiar Kamil Tokár Qiang Zhu Huan Fei w.n Yasuhiro Sugawara IvanŠtich yan Jun Li Department of Applied Physics Osaka University2-1 YamadaokaSuitaOsaka 565-0871Japan Institute of Physics Slovak Academy of SciencesBratislava 84511Slovakia Institute of Informatics Slovak Academy of SciencesBratislava 84507Slovakia Faculty of natural Sciences University of Ss.Cyril and MethodiusTrnava 91701Slovakia Key Laboratory of Instrumentation Science and Dynamic Measurement School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China

The common ways to activate a chemical reaction are by heat,electric current,or ***,mechanochemistry,where the chemical reaction is activated by applied mechanical force,is less common and only poorly understood at the atomic *** we report a tip-induced activation of chemical reaction of carbon monoxide to dioxide on oxidized rutile TiO_(2)(110)*** activation is studied by atomic force microscopy,Kelvin probe force microscopy under ultrahigh-vacuum and liquid nitrogen temperature conditions,and density functional theory(DFT)*** reaction is inferred from hysteretic behavior of frequency shift signal further supported by vector force mapping of vertical and lateral forces needed to trigger the chemical reaction with torque motion of carbon monoxide towards an oxygen *** reaction is found to proceed stochastically at very small tip-sample ***,the local contact potential difference reveals the atomic-scale charge redistribution in the reactants required to unlock the *** results open up new insights into the mechanochemistry on metal oxide surfaces at the atomic scale.

关键词： atomic resolution mechanochemistry atomic force microscopy Kelvin probe force microscopy density functional theory(DFT)simulation CO oxidation catalysis rutile TiO_(2)surface

Superatom-assembled boranes,carboranes,and low-dimensional boron nanomaterials based on aromatic icosahedral B_(12)and C_(2)B_(10)

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nano Research 2024年第7期17卷 6734-6740页

作者： Qiao-Qiao yan yan-Fang wei Qiang Chen Yue-w.n Mu Si-Dian Li Institute of Molecular Science Shanxi UniversityTaiyuan 030006China

Using the experimentally known aromatic icosahedral superatoms I_(h)B_(12)H_(12)2−and D_(5d)1,12-C_(2)B_(10)H_(12)as building blocks and based on extensive density functional theory calculations,we predict herein a series of core–shell superpolyhedral boranes and carboranes in a bottom-up approach,including the high-symmetry Th B_(12)@B_(152)H_(72)2−(2),C2h C_(2)B_(10)@B_(152)H_(72)(3),D_(3d)B_(12)@B_(144)H_(66)(4),I_(h)B_(12)@C_(24)B_(12)0H_(72)2−(6),and D_(5d)C_(2)B_(10)@C_(24)B_(12)0H_(72)(7).More interestingly,the superatom-assembled linear D2h B_(36)H_(32)^(2−)(8),close-packed planar D_(3d)B_(84)H_(60)^(2−)(10),and nearly close-packed core−shell D_(3d)B_(12)@B144H_(6)6(4)can be extended periodically to form the one-dimensional(1D)α-rhombohedral borane nanowire B_(12)H_(10)(Pmmm)(9),two-dimensional(2D)α-rhombohedral monolayer borophane B_(12)H_(6)(P m1)(11),and the experimentally known three-dimensional(3D)α-rhombohedral boron(R m)(12)which can be viewed as an assembly of the monolayer B_(12)H_(6)(11)staggered in vertical direction,setting up a bottom-up strategy to form low-dimensional boron-based nanomaterials from their borane“seeds”via partial or complete *** bonding analyses indicate that the high stability of these nanostructures originates from the spherical aromaticity of their icosahedral B_(12)or C_(2)B_(10)structural units which possess the universal skeleton electronic configuration of 1S21P61D101F8 follow.ng the wade’s n+1 *** infrared(IR)and Raman spectra of the most-concerned neutral B_(12)@B144H_(6)6(4)and C_(2)B_(10)@C_(24)B_(12)0H_(72)(7)are computationally simulated to facilitate their experimental characterizations.

关键词： superatom-assembling bottom-up approach density functional theory superpolyhedral boranes superpolyhedral carboranes borophanes

“Capture-activation-recapture” mechanism-guided design of double-atom catalysts for electrocatalytic nitrogen reduction

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Journal of Energy Chemistry 2024年第9期96卷 437-447页

作者： Cheng He Shiqi yan w.nxue Zhang State Key Laboratory for Mechanical Behavior of Materials School of Materials Science1nd EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina School of Materials Science1nd Engineering Chang’an UniversityXi’an 710064ShaanxiChina

Compared with the traditional industrial nitrogen fixation, electrocatalytic methods, especially those utilizing double-atom catalysts containing nonmetals, can give good consideration to the economy and environmental protection. However, the existing “acceptance-donation” mechanism is only applicable to bimetallic catalysts and nonmetallic double-atom catalysts containing boron atoms. Herein, a novel “capture-activation-recapture” mechanism for metal-nonmetal double-atom catalyst is proposed to solve the problem by adjusting the coordination environments of nonmetallic atoms and utilizing the activation effect of metal atoms on nitrogen. Based on this mechanism, the nitrogen reduction reaction (nRR) activity of 48 structures is calculated by density functional theory calculation, and four candidates are selected as outstanding electrocatalytic nitrogen reduction catalysts: Si-Fe@nG (U_(L) = –0.14 V), Si-Co@nG (U_(L)= –0.15 V), Si-Mo@BP1 (U_(L) = 0 V), and Si-Re@BP1 (U_(L) = –0.02 V). The analyses of electronic properties further confirm “capture-activation-recapture” mechanism and suggest that the difference in valence electron distribution between metal and Si atoms triggers the activation of n≡n bonds. In addition, a machine learning approach is utilized to generate an expression and an intrinsic descriptor that considers the coordination environment to predict the limiting potential. This study offers profound insight into the synergistic mechanism of TM and Si for nRR and guidance in the design of novel double-atom nitrogen fixation catalysts.

关键词： "Capture-activation-recapture"mechanism Double-atom catalyst nitrogen reduction reaction Density functional theory