检索结果-南通市图书馆

Defect-modulated and heteroatom-functionalized Ti_(3−x)c_(2)T_(y)MXene 3D nanocavities induce growth of MoSe_(2)nanoflakes toward electrocatalytic hydrogen evolution in all pH electrolytes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第7期17卷 6294-6304页

作者： Ming Du Xianzhi Yang Jian Zhang w.i chen Huajie Huang Xinbao Zhu Xing’ao Li State Key Laboratory for Organic Electronics and information Displays and institute of Advanced Materials(iAM) Jiangsu National Synergetic Innovation Centre for Advanced Materials(SICAM)Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023China college of Electronic and Optical Engineering and college of Flexible Electronics Nanjing University of Posts and Telecommunications(NJUPT) Nanjing 210023China New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023China college of Pharmaceutical and chemical Engineering Taizhou UniversityJiaojiang 318000China college of Mechanics and Materials Hohai UniversityNanjing 210098China college of chemical Engineering Nanjing Forestry UniversityNanjing 210037China

Reducing kinetic energy barriers and developing accessible active sites are critical to deliver high hydrogen evolution reaction(HER)*** this paper,we synthesized defect-modulated and heteroatom(boron)-functionalized three-dimensional(3D)bowl-shaped Ti_(3−x)c_(2)T_(y)MXene(B-TcT)nanocavities coupled with the vertical growth of MoSe_(2)*** B-TcT@MoSe_(2)nanohybrids catalyst delivers the overpotentials of 49.9,52.7,and 67.8 mV to reach a HER current density of 10 mA·cm^(−2)under acidic,alkaline,and neutral conditions,*** outstanding HER activity is predominantly attributed to the heteroatom functionalization,self-adapting Ti vacancy(VTi)defect modulation,and spatial configuration design in the 3D B-TcT nanocavity,w.ich synergistically regulate the electronic structure,activate the basal plane/edge unsaturated sites,and reduce the reaction energy *** and theoretical calculations demonstrate that strong heterogeneous interfacial bonding interactions between B-TcT and MoSe_(2)can dramatically reduce the free energy of hydrogen adsorption and facilitate efficient interfacial charge migration,thus essentially improving the HER *** used this 3D porous nanohybrid system assembled by defectrich lamellar structures to elucidate the advantageous synergistic effects of multiple mechanisms among defect structure,heteroatom functionalization,and interfacial coupling,w.ich provided important insights for the development of efficient hybridtype catalysts.

关键词： electrocatalytic H_(2)evolution three-dimensional(3D)MXene nanocavity MoSe_(2)nanoflake self-adapting Ti vacancy defect heteroatom-functionalized interfacial interaction

Superexchange and charge transfer in the nickelate superconductor La_(3)Ni_(2)O_(7) under pressure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2024年第11期67卷 1-8页

作者： w.i wú Zhihui Luo Dao-Xin Yao Meng wang center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesSchool of PhysicsSun Yat-sen UniversityGuangzhou 510275China

Recently, a bulk nickelate superconductor La_(3)Ni_(2)O_(7) is discovered at pressures with a remarkable high transition temperature T_(c)~ 80 K. Here, we study a Hubbard model with tight-binding parameters derived from ab initio calculations of La_(3)Ni_(2)O_(7),by employing large scale determinant quantum Monte carlo and cellular dynamical mean-field theory. Our result suggests that the superexchange couplings in this system are comparable to that of cuprates. The system is a charge transfer insulator as the hole concentration becomes four per site at large Hubbard U. Upon hole doping, two low-energy spin-singlet bands emerge in the system exhibiting distinct correlation properties: w.ile the one composed of the out-of-plane Ni-d_(3z^(2)-r^(2)) and O-p_(z) orbitals demonstrates strong antiferromagnetic correlations and narrow effective bandwidth, the in-plane singlet band consisting of the Ni-d_(x^(2)-y^(2)) and O-p_(x)/p_(y) orbitals is in general more itinerant. Over a broad range of hole doping, the doped holes occupy primarily the d_(x^(2)-y^(2)) and p_(x)/p_(y) orbitals, whereas the d_(3z^(2)-r^(2)) and p_(z) orbitals retain underdoped. we propose an effective t-J model to capture the relevant physics and discuss the implications of our result for comprehending the La_(3)Ni_(2)O_(7) superconductivity.

关键词： superconductivity nickelate superconductors Hubbard model superexchange charge transfer insulator quantum Monte carlo

Therapeutic potential of targeting protein tyrosine phosphatases in liver diseases

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第8期14卷 3295-3311页

作者： ao wang Yi Zhang Xinting Lv Guang Liang Department of Pharmacy and institute of inflammation Zhejiang Provincial Affiliated People’s HospitalHangzhou Medical CollegeHangzhou 310014China Key Laboratory of Natural Medicines of the changbai Mountain Ministry of EducationYanbian UniversityYanji 133002China chemical Biology Research center School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhou 325035China

Protein tyrosine phosphorylation is a post-translational modification that regulates protein structure to modulate demic organisms’homeostasis and *** physiological process is regulated by two enzyme families,protein tyrosine kinases(PTKs)and protein tyrosine phosphatases(PTPs).As an important regulator of protein function,PTPs are indispensable for maintaining cell intrinsic physiology in different systems,as well as liver physiological and pathological *** of PTPs has been implicated in multiple liver-related diseases,including chronic liver diseases(cLDs),hepatocellular carcinoma(Hcc),and liver injury,and several PTPs are being studied as drug therapeutic ***,given the regulatory role of PTPs in diverse liver diseases,a collated review of their function and mechanism is ***,based on the current research status of targeted therapy,we emphasize the inclusion of several PTP members that are clinically significant in the development and progression of liver *** an emerging breakthrough direction in the treatment of liver diseases,this review summarizes the research status of PTP-targeting compounds in liver diseases to illustrate their potential in clinical ***,this review aims to support the development of novel PTP-based treatment pathways for liver diseases.

关键词： Tyrosine phosphorylation PTPs Signal transduction cLDs Hcc Allosteric inhibitor PROTAcs Drug development

Study on the properties of solar cell under bias condition by using impedance spectroscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2024年第9期20卷 518-522页

作者： Xiao wenbo Li ao Xiao Bangzhi Key Laboratory of Nondestructive Test Ministry of EducationNanchang Hangkong UniversityNanchang 330063China Science and Technology college Nanchang Hangkong UniversityGongqingcheng 332020China School of Engineering and construction Nanchang UniversityNanchang 330031China

This paper investigates the properties of silicon cells(Si)and perovskite solar cells(PSc)under bias condition by using impedance *** parallel resistances R_(p) of Si and PSc are found to decrease with increasing bias,but the capacitance c_(p) shows the opposite *** Rp with c_(p),bias has a greater impact on the c_(p) of both cells.

关键词： spectroscopy impedance condition

Hydrogen release of NaBH_(4) below 60 ℃ with binary eutectic mixture of xylitol and erythritol additive

在线全文

学校读者我要写书评

暂无评论

chinese Journal of chemical Engineering 2024年第7期71卷 225-234页

作者： Yugang Shu Jiaguang Zheng chengguo Yan ao Xia Meiling Lv Zhenxuan Ma Zhendong Yao School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of Advanced Energy Materials chemistry(Ministry of Education) Nankai UniversityTianjin 300071China college of Materials and chemistry China Jiliang UniversityHangzhou 310018China

NaBH_(4) was widely regarded as a low-cost hydrogen storage material due to its high-mass hydrogen capacity of approximately 10.8%(mass)and high volumetric hydrogen capacity of around 115 g·L^(–1).However,it exhibits strong stability and requires temperatures above 500℃ for hydrogen release in practical *** this study,two polyhydric alcohols,xylitol and erythritol(XE),were prepared as a binary eutectic sugar alcohol through a grinding-melting *** binary eutectic sugar alcohol was used as a proton-hydrogen carrier to destabilize NaBH_(4).The 19NaBH_(4)-16XE composite material prepared by ball milling could start releasing hydrogen at 57.5℃,and the total hydrogen release can reach over 88.8%(4.45%(mass))of the theoretical *** the 19NaBH_(4)-16XE composite was pressed into solid blocks,the volumetric hydrogen capacity of the block-shaped composite could reach 67.2 g·L^(–1).By controlling the temperature,the hydrogen desorption capacity of the NaBH_(4)-XE composite material was controllable,w.ich has great potential for achieving solid-state hydrogen production from NaBH_(4).

关键词： Hydrogen Desorption Binary mixture NaBH_(4) Xylitol Erythritol

Near resonance vibration isolation on a levered-dual response(LEDAR)coulomb-damped system by differential preloads/offsets in linear springs

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 1033-1050页

作者： T.i.TOLUwALOJU c.K.THEiN D.HALiM Department of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100Zhejiang ProvinceChina Nottingham Ningbo china Beacons of Excellence Research and innovation institute University of Nottingham Ningbo ChinaNingbo 315048Zhejiang ProvinceChina

The levered-dual response(LEDAR)coulomb-damped system attains near resonant vibration isolation by differential preloads/offsets in linear *** takes the advantages of both the preloads/offsets in linear springs and the guiderail friction for realizing different levels of vibration *** isolation capacities are investigated on the strategies with both the horizontal and vertical guiderails,with the horizontal rail only,and without *** compressive preloads generally result in the consumption of most of the initial excitation energy so as to overcome the potential *** isolation onsets at the frequency ratio of 1∓0.095 on the left-hand side(LHS)and the right-hand side(RHS)of the lever are relative to the load plate *** observed near resonant isolation thus makes the LEDAR system a candidate for the isolation of the mechanical systems about resonance w.ile opening a path for simultaneous harvesterisolation functions and passive functions at extreme frequencies.

关键词： lever ratio coulomb damping preload tension/compression isolation band/depth offset potential

Learning about good nutrition with the 5-color front-of-package label"Nutri-Score":an experimental study

在线全文

学校读者我要写书评

暂无评论

Food Science and Human wellness 2024年第3期13卷 1195-1200页

作者： Robin c.Hau Klaus w.Lange University of Applied Sciences Landshut Landshut 84036Germany Faculty of Human Sciences University of RegensburgRegensburg 93040Germany

The Nutri-Score is a 5-color front-of-pack nutrition label designed to provide consumers with an easily understandable guideline to the healthiness of food *** impact that the Nutri-Score may have on consumers'choices is unclear since different experimental paradigms have found vastly different effect *** the present study,we have investigated how student participants change a hypothetical personal 1-daydietary plan after a learning phase during w.ich they learn about the Nutri-Scores of the available food *** were instructed to compose a healthy diet plan in order that the question of whether the NutriScore would improve their ability to compose a healthy dietary plan could be investigated,independent of the question of whether they would apply this knowledge in their ordinary *** found a substantial(cohen's d=0.86)positive impact on nutritional quality(as measured by the Nutrient Profiling System score of the Food Standards Agency)and a medium-sized(cohen's d=0.43)reduction of energy *** content reduction was larger for participants who had initially composed plans with higher energy *** results suggest that the Nutri-Score has the potential to guide consumers to healthier food *** remains unclear,however,whether this potential will be reflected in real-life dietary choices.

关键词： Nutri-Score Front-of-package label Nudge Nutrition Health

Lignin‐derived carbon with pyridine N‐B doping and a nanosandwich structure for high and stable lithium storage

在线全文

学校读者我要写书评

暂无评论

carbon Energy 2024年第8期6卷 232-247页

作者： Dic.ao wu Jiayuan Li Yuying Zhao ao wang Gaoyue Zhang Jianchun Jiang Mengmeng Fan Kang Sun Key Lab of Biomass Energy and Material Jiangsu ProvinceNational Engineering Lab for Biomass Chemical UtilizationKey and Open Lab on Forest Chemical EngineeringSFAInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina Jiangsu co‐innovation center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina School of Energy and Environment Southeast UniversityNanjingChina Department of chemistry Tsinghua UniversityBeijingChina Fujian Provincial Key Laboratory of Biomass Low‐carbon conversion Academy of Advanced Carbon Conversion TechnologyHuaqiao UniversityXiamenChina chinese Academy of Sciences Xinjiang Lihua institute of Technology UrumqiChina

Biomass‐derived carbon is a promising electrode material in energy storage ***,how to improve its low capacity and stability,and slow diffusion kinetics during lithium storage remains a *** this research,we propose a“self‐assembly‐template”method to prepare B,N codoped porous carbon(BN‐c)with a nanosandwich structure and abundant pyridinic N‐B *** nanosandwich structure can increase powder density and cycle stability by constructing a stable solid electrolyte interphase film,shortening the Li^(+)diffusion pathway,and accommodating volume expansion during repeated charging/*** abundant pyridinic N‐B species can simultaneously promote the adsorption/desorption of Li^(+)/PF_(6)^(−)and reduce the diffusion *** BN‐c electrode showed a high lithium‐ion storage capacity of above 1140 mAh g^(−1)at 0.05 A g^(−1)and superior stability(96.5%retained after 2000 cycles).Moreover,owing to the synergistic effect of the nanosandwich structure and pyridinic N‐B species,the assembled symmetrical BN‐c//BN‐c full cell shows a high energy density of 234.7wh kg^(−1),high power density of 39.38 kw kg−1,and excellent cycling stability,superior to most of the other cells reported in the *** the density functional theory simulation demonstrated,pyridinic N‐B shows enhanced adsorption activity for Li^(+)and PF_(6)^(−),w.ich promotes an increase in the capacity of the anode and cathode,***,the relatively lower diffusion barrier of pyridinic N‐B promotes Li^(+)migration,resulting in good rate ***,this study provides a new approach for the synergistic modulation of a nanostructure and an active site simultaneously to fabricate the carbon electrode material in energy storage devices.

关键词： high cycling stability high energy density lithium‐ion batteries pyridinic N‐B species sandwich structure carbon nanosheet

Effects of biochar produced from distiller grains on agronomic performances of sorghum(Sorghum bicolor L.) and greenhouse gas emissions from soil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2024年第5期34卷 951-959页

作者： Hongjun YANG Suyi ZHANG Jingyu HU Jianguo HUANG Zonghua ao Xiaoqin wANG Zhe Li Xuepin Liao college of Resources and Environment Southwest University National Engineering Research center of Solid-State Brewing Luzhou Laojiao Co.Ltd. college of Biomass Science and Engineering Sichuan University

Aromatic liquor breweries produce massive distiller grains containing a high percentage of rice husks that necessitate harmless treatment and resource utilization. These husk-rich distiller grains can be pyrolyzed in the Ni-based catalyst system at a relatively low temperature（480?c） into combustible gas,w.ich is used in liquor distillation, and biochar（BDG） with high mineral nutrients and good surface properties. A 3-year field experiment（2018–2020） was established to understand the effects of BDG on sorghum agronomic performances and greenhouse gas emissions from the soil. The results showed that BDG had higher mineral nutrient（N, P, K, and S） contents, larger cation exchange capacity, and better surface structure than those prepared using the traditional method at 400 and 600?c. compared with sole chemical fertilizer（cF）, the combination of cF and BDG（cF+BDG） increased sorghum nutrient（N, P, and K） uptake, yield, fertilizer use efficiency, and economic benefit. cumulative cO2emission from the soil changed little between with and without BDG,indicating the microbial stability of BDG. The effective adsorption of NH3or NH4+by BDG upon N application may reduce N loss through NH3and N2O emissions and increase the efficiency of fertilizer N use. cumulative cH4emission ranged from 32.45 to 44.86 g ha-1, w.ich could be overlooked as a greenhouse gas in the sorghum field. Moreover, cF+BDG significantly decreased NH3and N2O emissions for the production of each unit of sorghum grains and the cO2emission from the land for the production of a certain amount of sorghum grains. Therefore, cF+BDG exhibited better agronomic and environmental performances in sorghum cultivation.

关键词： cO2 emission economic benefit environmental performance fertilizer use efficiency N2O emission NH3 emission nutrient uptake yield