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chinese Journal of chemical Engineering 2024年第2期66卷 40-50页

作者： Yi-Fei Liang Jin-Rong Lu Shang-Kun Tian wen-Quan cui Li Liu Hebei Provincial Key Laboratory of Environmental Photocatalytic.and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China

For the use of green hydrogen energy,it is crucial to have efficient photocatalytic activity for hydrogen generation by water reforming of methanol under mild *** attention has been paid to gc_(3)N_(4)as a promising photocatalyst for the generation of *** improve the separation of photogenerated charge,porous nanosheet g-c_(3)N_(4)was modified with Pt nanoclusters(Pt/g-c_(3)N_(4))through impregnation and following photo-induced *** catalyst showed excellent photocatalytic activity of water reforming of methanol fo r hydrogen production with a 17.12 mmol·g^(-1)·h^(-1)rate at room temperature,which was 311 times higher than that of the unmodified g-c_(3)N_(4).The strong interactions of Pt-N in Pt/g-c_(3)N_(4)constructed effective electron transfer c.annels to promote the separation of photogenerated electrons and holes *** addition,in-situ infrared spectroscopy was used to investigate the intermediates of the hydrogen production reaction,which proved that methanol and water eventually turn into H_(2)and cO_(2)via formaldehyde and *** study provides insights for understanding the photocatalytic hydrogen production in the water reforming of methanol.

关键词： Water reforming of methanol Photocatalysis g-c_(3)N_(4) Pt nanoclusters Hydrogen production

High-chromium vanadium-titanium magnetite all-pellet integrated burden optimization and softening-melting behavior based on flux pellets

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 498-507页

作者： Bojian chen Tao Jiang Jing wen Guangdong Yang Tangxia Yu Fengxiang Zhu Peng Hu School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China Liaoning Key Laboratory for Metallurgical Sensor and Technology Shenyang 110819China State key laboratory of vanadium and titanium resources comprehensive utilization Panzhihua 617000China

High-chromium vanadium-titanium magnetite(HVTM)is a crucial polymetallic-associated resource to be *** allpellet operation is a blast furnace trend that aims to reduce carbon dioxide emissions in the *** referencing the production data of vanadium-titanium magnetite blast furnaces,this study explored the softening-melting behavior of high-chromium vanadium-titanium magnetite and obtained the optimal integrated burden based on flux *** results show that the burden with a composition of 70wt%flux pellets and 30wt%acid pellets exhibits the best softening-melting *** comparison to that of the single burden,the softening-melting characteristic temperature of this burden composition was *** melting interval first increased from 307 to 362℃and then decreased to 282℃.The maximum pressure drop(ΔPmax)decreased from 26.76 to 19.01 *** permeability index(S)dropped from 4643.5 to 2446.8 kPa·℃.The softening-melting properties of the integrated burden were apparently *** acid pellets played a role in withstanding load during the softening *** flux pellets in the integrated burden exhibited a higher slag melting point,which increased the melting temperature during the melting *** slag homogeneity and the Tic produced by over-reduction led to the gas permeability deterioration of the single *** segregation of the flux and acid pellets in the HVTM proportion and basicity mainly led to the better softening-melting properties of the integrated burden.

关键词： high-chromium vanadium-titanium magnetite softening-melting properties all pellets integrated burden flux pellets

Irreducible Representations of GL_(n)(c)of Minimal Gelfand-Kirillov Dimension

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Acta Mathematica Sinica,English Series 2024年第3期40卷 639-657页

作者： Zhan Qiang BAI Yang Yang cHEN Dong wen LIU Bin Yong SUN School of Mathematical Sciences Soochow UniversitySuzhou 215006P.R.China School of Sciences JiangnanUniversityWui214122P.R.China School of Mathematical Sciences Zhejiang UniversityHangzhou 310058P.R.China Institute for Advanced Study in Mathematics Zhejiang UniversityHangzhou 310058P.R.China

In this article,by studying the Bernstein degrees and Goldie rank polynomials,we es-tablish a comparison between the irreducible representations of G=GL_(n)(c)possessing the minimal Gelfand-Kirillov dimension and those induced from finite-dimensional representations of the maximal parabolic subgroup of G of type(n-1,1).We give the transition matrix between the two bases for the corresponding coherent families.

关键词： Bernstein degree coherent continuation Gelfand-Kirillov dimension

Effects of Enclosure on Grassland Ecological and Economic Benefits in Northern china

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chinese Geographical Science 2024年第1期34卷 67-78页

作者： HU Bo wen Qingke XI Fengjiang LI Mengyao WANG Libing REN Yuejuan Aerospace Information Research Institute Chinese Academy of SciencesBeijing100094China University of chinese Academy of Sciences Beijing100049China Inner Mongolia Remote Sensing center co. Ltd.Huhhot010000China Xilinhot the Maodeng pasture Xilinhot026000China china University of Mining and Technology Xuzhou221116China Shanxi Provincial Key Lab of Resources Environment and Disaster MonitoringCoal Geological Geophysical Exploration Surveying&Mapping Institute of Shanxi ProvinceJinzhong030600China

Grasslands in northern china serve the country as both an ecological barrier and a livestock production ***,installing enclosures has been becoming the major grassland restoration measure adopted by many local ***,the effects of restoration on both ecological and production benefits of grassland remain unclear for implemented grassland restoration ***,a representative rangeland in northern china,the Maodeng pasture in Inner Mongolia Autonomous Region was selected as the study area,and remote sensing monitoring analyses were carried out to quantify the ecological benefits and economic benefits from 2015 to *** results showed that:1) in terms of ecological benefits,the grassland area with a grassland coverage rate of more than 60% accounts for 32.3% of the regional area,and 86.4% of its grassland grew significantly better than the same period in2015,showing a significant improvement in grassland *** the average amount of carbon per unit area as the ecological benefit evaluation index,it increased by 27.1% to 32.48Tg c/yr from 2015 to 2021.2) In terms of economic benefits,both theoretical grass production and livestock carrying capacity increased from 2015 to *** to 2015,the theoretical grass production in 2021 increased by 24.8% to 71 900 *** livestock carrying capacity reached 52 100 sheep units in 2021,nearly 11 000 sheep units more than that in *** the study period,multiple economic indicators(on a per capita basis of permanent residents) for the pastoral area of Xilinhot city to which the Maodeng pasture belongs,have grown *** capita total income rose from 29 630 yuan(RMB) in2015 to 62 859 yuan(RMB) in *** on grassland resources to develop the pastoral ecology also broadens the potential economic development ***,the establishment of the reserve and the experiment of implanting an enclosure policy have had a significant and positive impact on Maodeng pasture’s develo

关键词： enclosure grassland ecological benefit economic benefit Maodeng pasture Inner Mongolia northern china

Endogenous Trypsin Triggers Free Fluoride Release from Antarctic Krill(Euphausia superba)cuticle

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Journal of Oc.an University of china 2024年第3期23卷 766-774页

作者： PENG Yuanhuai JI Wei JI Hongwu HAN Zhiping ZHANG Shiqi wen Yaping college of Food Science and Engineering Lingnan Normal UniversityZhanjiang 524048China college of Biological and Food Engineering Guangdong University of EducationGuangzhou 510303China Guangdong Provincial Key Laboratory of Aquatic Products Processing and Safety Guangdong Ocean UniversityZhanjiang 524088China college of Food Science and Technology Guangdong Ocean UniversityZhanjiang 524088China college of continuing Education Lingnan Normal UniversityZhanjiang 524048China

During postmortem storage,fluoride in Antarctic krill can be enriched in the ***,as the most important digestive enzyme in Antarctic krill with a high activity in low temperature,plays a potential role in this *** this study,endogenous trypsin was purified and its properties were *** involvement of trypsin in the generation of free fluoride from Antarctic krill cuticle was *** microstructure before and after hydrolysis was compared with scanning electron microscopy,and the ash samples of the hydrolyzed Antarctic krill cuticle were analyzed with X-ray diffraction,Fourier transform infrared spectroscopy,and electron dispersive spectroscopy,*** spectrometry analysis and inhibition tests confirmed that the purified enzyme was endogenous *** of the present study indicated that trypsin digestion caused the increases of the concentrations of both fluoride ions and free amino N simultaneously,while the protein coated on the cuticle surface was dissolved ***,no compositional c.ange was detected in the cuticle inorganic *** findings suggest that trypsin triggered free fluoride release from Antarctic krill *** addition,the kinetics of free fluoride release could be described by the equation c_(W)=(1-0.97^(-0.006t)-0.03e^(0.0558t))×337.53+*** present study improved the understanding of the role of trypsin in free fluoride release from Antarctic krill cuticle,facilitating future studies aimed at reducing the fluoride content in krill protein during Antarctic krill processing.

关键词： Antarctic krill cuticle fluoride trypsin

chiral Phenol-2NO Ligand cooperation with Achiral Organic Base in the Zn(II)-catalyzed Asymmetric Alkylation Reaction of Indoles

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chinese Journal of chemistry 2024年第13期42卷 1474-1480页

作者： Ke-Lan Xu Yu-Heng Wang Xi-Rui Wang Pan Hu Bo-wen Pan wen-Jing Zhang Zi-Yue chen Ying Zhou Xiong-Li Liu National&Local Joint Engineering Research center for the Exploitation of Homology Resources of Southwest Medicine and Food Guizhou UniversityGuiyangGuizhou 550025China college of Pharmaceutical Sciences Guizhou University of Traditional Chinese MedicineGuiyangGuizhou 550025China Green catalysis center and College of ChemistryZhengzhou UniversityZhengzhouHenan 450001China

The privileged c_(2)-symmetric rigid phenol-type ligand is more attractive but challenging in asymmetric ***,we designed and synthesized a class of rigid-featured chiral tridentate Phenol-2NO ligands,that incorporate the advantages of both the phenol skeleton and pyrroloimidazolone-based N-oxide moiety,from readily available L-prolinamides in operationally simple two steps and up to 44%overall *** importantly,using an achiral quinoline derivative as an additive,the newly developed Phenol-2NO ligand could serve as the anioic ligand upon deprotonative activation to coordinate to Zn(II)to form a highly enantioselective catalyst for the asymmetric Michael-type Friedel-crafts alkylation reaction of indoles with 2,*** yields(up to 90%)and high enantioselectivities(up to 99%ee)are obtained for a wide range of substrates under mild *** and DFT calculations revealed the reaction mec.anism and the origins of the *** also represented the first activation of phenol-type ligand/metal complex by an achiral organic base as the additive in asymmetric catalysis.

关键词： Phenol-2NO c_(2)-Symmetric Rigid-featured Tridentate ligand Asymmetric catalysis Alkylation Synthesis design Heterocycles

Enhanced red luminescence of ca_(3)Si_(2−x)M_(x)O_(7):Eu^(3+)(M=Al,P)phosphors via partial substitution of Si^(4+) for applications in white light-emitting diodes

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Rare Metals 2024年第2期43卷 736-748页

作者： Yu-Hao Ma Xi Gao wen-Tao Zhang Zhen-Rui Yang Zhou Zhao chen Qu college of Materials and chemistry and chemical Engineering Chengdu University of TechnologyChengdu610059China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu610059China International Advanced Energy Science Research and Education center Graduate School of Energy ScienceKyoto UniversityYoshida-HonmachiKyoto606-8501Japan

A red-emitting phosphor ca_(2.91)Si_(2)O_(7):0.09Eu^(3+) with partial Al^(3+)/P^(5+) substitution on Si^(4+) was synthesized via a simple solid-state method,and the effects of the introduction of the M^(3+/5+)(M=Al,P)ions on the crystal structure and photoluminescence performance of ca_(2.91)Si_(2−x)M_(x)O_(7):0.09Eu^(3+) phosphors were *** X-ray diffraction(XRD),energy-dispersive X-ray spectroscopy(EDS),and X-ray photoelectron spectroscopy(XPS)results revealed that the structure of ca_(3)Si_(2)O_(7) remained the same after the introduction of Al^(3+) and P^(5+) *** characteristic emission of Eu^(3+)-doped ca_(3)Si_(2−x)M_(x)O_(7) phosphors exhibited two main peaks at 617 nm(red)and 593 nm(orange)under excitation at 394 nm,which originated from the^(5)D_(0)→^(7)F_(2)and^(5)D_(0)→^(7)F_(1) electron transitions of Eu^(3+) *** the partial substitution of Al^(3+) and P^(5+),the red emission intensities of the ca_(2.91)Si_(2)O_(7):0.09Eu^(3+) phosphors were significantly enhanced by 1.88-and 1.42-fold,respectively,which is attributed to the crystal-field effect around Eu^(3+).Meanwhile,the luminescence intensities of the ca_(2.91)Si_(1.96)Al_(0.04)O_(7):0.09Eu^(3+) and ca_(2.91)Si_(1.94)P_(0.06)O_(7):0.09Eu^(3+) phosphors at 210℃ were 79.36%and 77.53%of those at 30°c,respectively,indicating their excellent thermal ***,the as-prepared ca_(2.91)Si_(1.96)Al_(0.04)O_(7):0.09Eu^(3+)and ca_(2.91)Si_(1.94)P_(0.06)O_(7):0.09Eu^(3+) red-emitting phosphors were combined with a near-ultraviolet chip of 395 nm to fabricate red-light-emitting diode(LED)and white(w)-LED devices with excellent chromaticity *** summary,Al^(3+)/P^(5+)-substituted ca_(2.91)Si_(2)O_(7):0.09Eu^(3+) can serve as red-emitting phosphors for applications in w-LEDs.

关键词： ca_(3)Si_(2)O_(7) Red-emitting phosphor Structure substitution Luminescence enhancement crystal-field effect White light-emitting diode

One-step construction of strongly coupled co_(3)V_(2)O_(8)/co_(3)O_(4)/MXene heterostructure via in-situ co-F bonds for high performance all-solid-state asymmetric supercapacitors

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Rare Metals 2024年第2期43卷 682-691页

作者： Ji Zhou Bin-Bin Liu Hu Zheng wen-Qing Ma Qian Li cai-Xia Xu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan250022China

co_(3)V_(2)O_(8)/co_(3)O_(4)/Ti_(3)c_(2)T_(x) composite was easily synthesized via one-step succinct-operated hydrothermal *** interconnected co_(3)V_(2)O_(8)/co_(3)O_(4) nanowires network can in-situ grow and anchor on the surface of Ti_(3)c_(2)T_(x) via the strong co-F bonds and contribute tremendously to depress Ti_(3)c_(2)T_(x) *** from the synergistically interplayed effect among the multiple interfaces and high conductivity of Ti_(3)c_(2)T_(x) as well as outstanding stability of the as-designed nanostructure,the optimum co_(3)V_(2)O_(8)/co_(3)O_(4)/Ti_(3)c_(2)T_(x)electrode reaches a commendable specific capacitance(up to 3800 mF·cm^(−2)),great rate capability(80%capacitance retention after 20-times current increasing),and preeminent cycling stability(95.4%/85.5%retention at 7000th/20,000th cycle).Moreover,the all-solid-state asymmetric supercapacitor based on co_(3)V_(2)O_(8)/co_(3)O_(4)/Ti_(3)c_(2)T_(x) and active carbon can deliver a high energy density of 84.0μWh·cm^(−2) at the power energy of 3.2 mW·cm^(−2),and excellent cycling durability with 87.0%of initial capacitance retention upon 20,000 *** work provides a practicable pathway to tailor MXene-based composites for high-performance supercapacitor.

关键词： Ti_(3)c_(2)T_(x) co_(3)V_(2)O_(8)/co_(3)O_(4) Heterostructure cathode Supercapacitor

26-electrons redox-active polyoxovanadate clusters for aqueous zincion batteries

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Nano Research 2024年第5期17卷 4047-4054页

作者： Yimin Xing wen Yan Haiyang Wu Peng Huang chao Wang chao Lai School of chemistry and Materials Science Jiangsu Normal UniversityXuzhou 221116China

Aqueous zinc-ion batteries(ZIBs)are attaining increasing attention for their high safety and low *** significant progresses in realizing high-performance cathode material for ZIBs,simultaneously endowing them with high capacity and fast-charging capability,the long-term cycling stability remains a major unsolved *** this work,a polyoxovanadate cluster of(NH_(4))_(8)[V_(19)O_(41)(OH)_(9)]·11H_(2)O(NOV)is defined as a cathode material for ZIBs that contains mixed-valence vanadium sites(V^(4+)and V^(5+)).A maximum of 26 electrons can be accommodated in one[V_(19)O_(41)(OH)_(9)]^(8-){V_(19)O_(50)}cluster,contributing to the high theoretical specific capacity of 328 mA·h·g^(-1).The Ti_(3)c_(2)T_(x) MXene nanosheets are incorporated into NOV with the help of ionic liquid(IL)linkers to restrain the dissolution of vanadium species and facilitate electron transport across the *** interfacial bonding,anion exc.ange,and electrostatic interactions among NOV and MXene are provided by IL *** nanohybrid of NOV-IL-MXene endows excellent contact between MXene and NOV,thereby enhanced charge transfer is observed at ***,the as-synthesized NOV-IL-MXene cathodes exhibit high discharge capacity of 413 mA·h·g^(-1) at 0.2 A·g^(-1) even at high mass loading of 5.2 mg·cm^(-2),remarkable rate performance of 182 mA·h·g^(-1) at 10 A·g^(-1),and impressive cycling stability of 94%capacity retention after 2000 *** work opens up new opportunities to develop advanced polyoxovanadate hybrid cathodes for low-cost and high-performance aqueous ZIBs.

关键词： polyoxovanadate MXene composite materials cathodes zinc-ion batteries

Does ergogenic effect of caffeine supplementation depend on cYP1A2 genotypes? A systematic review with meta-analysis

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Journal of Sport and Health Science 2024年第4期13卷 499-508页

作者： Jieping Wang Luthfia Dewi Yundong Peng chien-wen Hou Yanmin Song Giancarlo condello Laboratory of Exercise Biochemistry University of TaipeiTianmu CampusTaipei 11153China Department of Emergency Medicine National Clinical Research Center for Geriatric DisordersXiangya HospitalCentral South UniversityChangsha 410008China Department of Nutrition Universitas Muhammadiyah SemarangSemarang 50273Indonesia School of Sports Medicine and Rehabilitation Beijing Sport UniversityBeijing 10084China Department of Medicine and Surgery University of ParmaParma 43126Italy

Background:The ergogenic effects of caffeine intake on exercise performance are well-established,even if differences exist among individuals in response to caffeine *** genetic variation of a specific gene,human cytochrome P450 enzyme 1A2(cYP1A2)(rs762551),may be one reason for this *** systematic review and meta-analysis aimed to comprehensively evaluate the influence of cYP1A2 gene types on athletes’exercise performance after caffeine ***:A literature search through 4 databases(Web of Science,PubMed,Scopus,and china National Knowledge Infrastructure)was conducted until March *** effect size was expressed as the weighted mean difference(WMD)by calculating fixed effects meta-analysis if heterogeneity was not significant(I^(2)≤50%and p≥0.1).Subgroup analyses were performed based on AA and Ac/cc genotype of ***:The final number of studies meeting the inclusion criteria was 12(n=666 participants).The overall analysis showed that the cycling time trial significantly improved after caffeine intake(WMD=-0.48,95%confidence interval(95%cI):-0.83 to-0.13,p=0.007).In subgroup analyses,acute caffeine intake improved cycling time trial only in individuals with the A allele(WMD=-0.90,95%cI:-1.48 to-0.33,p=0.002),but not the c allele(WMD=-0.08,95%cI:-0.32 to 0.17,p=0.53).caffeine supplementation did not influence the Wingate(WMD=8.07,95%cI:-22.04 to 38.18,p=0.60)or countermovement jump test(cMJ)performance(WMD=1.17,95%cI:-0.02 to 2.36,p=0.05),and these outcomes were not influenced by cYP1A2 ***:Participants with the cYP1A2 genotype with A allele improved their cycling time trials after caffeine ***,compared to placebo,acute caffeine supplementation failed to increase the Wingate or cMJ performance,regardless of cYP1A2 genotype.

关键词： countermovement jump test Endurance Ergogenic aid Gene polymorphism Wingate