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Nano Research 2022年第6期15卷 5123-5133页

作者： Anchun tang Chubin wan Xianhe Meng Xiangcao Li Xiaoyu Hu Miaofeng Huang Xin Ju Physics Department University of Science and TechnologyBeijing 100083China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China College of Science Xi’an Aeronautical UniversityXi’an 710077China

Sodium-ion capacitors have the potential to deliver high energy,power density,and excellent cycling *** this study,ultrathin Co_(3)V_(2)O_(8)nanosheets are successfully synthesized through an one-pot hydrothermal reaction and a subsequent doping reconfiguration-induced vacancy-forming *** oxygen vacancies and high porosity are observed in the Co_(3)V_(2)O_(8)electrode and result in excellent electrochemical performance in 1 M NaOH and Na_(2)SO_(4)*** cathode has a large specific capacity(@NaOH),high-rate capability(@NaOH),wide voltage window(@Na_(2)SO_(4)),and favorable long-cycle ***-situ X-ray diffraction and X-ray photoelectron spectroscopy show that the Co_(3)V_(2)O_(8)electrode displays a battery-like behavior related to OH−ions in the alkaline NaOH *** contrast,in the neutral Na_(2)SO_(4)electrolyte,Co_(3)V_(2)O_(8)mainly shows an intercalation/extraction behavior with Na+*** functional theory calculation suggests that oxygen vacancy leads to a new state located in the bandgap,which greatly improves the electron transfer efficiency and reduces the sodiation energy barrier of Co_(3)V_(2)O_(8)in the neutral Na_(2)SO_(4)***,when paired with a high-voltage activated carbon(AC)anode,full-cell Co_(3)V_(2)O_(8)//Na_(2)SO_(4)//AC delivers high energy/power densities(89.6 Wh·kg^(−1)/330 W·kg^(−1)).

关键词： mesoporous Co_(3)V_(2)O_(8) oxygen vacancy aqueous hybrid capacitors sodium ion storage electrochemical mechanism

Changes in soil fertility and microbial communities following cultivation of native grassland in Horqin Sandy Land,China:a 60-year chronosequence

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Ecological Processes 2023年第1期12卷 260-273页

作者： Jiao tang Jinzhong Yin Anthony J.Davy Feifei Pan Renhui Miao Xu Han School of Resource and Environmental Sciences Henan Institute of Science and TechnologyXinxiang 453003China Henan Engineering Research Center of Biological Pesticide and Fertilizer Development and Synergistic Application Xinxiang 453003China School of Biological Sciences University of East AngliaNorwich Research ParkNorwich NR47TJUK School of Horticulture and Landscape Architecture Henan Institute of Science and TechnologyXinxiang 453003China School of Life Sciences Henan UniversityKaifeng 475004China Forestry College Beihua UniversityJilin 132013China

Background Grassland conversion to cropland is a prevailing change of land use in traditionally nomadic areas,especially in the Mongolian *** investigated the effects of grassland conversion followed by continuous cultivation on soil properties and microbial community characteristics in Horqin Sandy Land,a typical agro-pastoral transition zone of Northern *** samples were collected from the topsoil(upper 20 cm)across a 60-year cultivation chronosequence(5,15,25,35 and 60 years)and unconverted native *** physico-chemical properties were determined and high-throughput sequencing was used to assess microbial community diversity and *** Grassland cultivation resulted in changes to soil properties in both the short and longer ***,it significantly increased soil bulk density(BD),electrical conductivity(EC),soil total nitrogen(TN),available phosphorus(AP)and available potassium(AK)concentrations,while reducing soil water content(SWC)and soil organic carbon content(SOC).Over the next 35-55 years of continuous cultivation,the trend for most of these characteristics was of reversion towards values nearer to those of native grassland,except for SOC which remained highly *** of grassland substantially altered soil microbial communities at phylum level but there was no significant difference in microbialα-diversity between native grassland and any ***,soil bacterial and fungal community structures at phylum level in the croplands of all cultivation years were different from those in the native *** further revealed that bacterial and fungal structures in cropland tended to become more similar to native grassland after 15 and 25 years of cultivation,*** analysis indicated that SOC,EC and BD were primary determinants of microbial community composition and *** These findings suggest that agricultural cultivation of grassland has considerable effects

关键词： Grassland-cropland conversion Reclamation Soil properties Microbe Horqin Sandy Land

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Fingerprinting fecal DNA and mRNA as a non-invasive strategy to assess the impact of polychlorinated biphenyl 126 exposure on zebrafish

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Journal of Environmental Sciences 2021年第8期33卷 15-25页

作者： Mengyuan Liu Yumiao Sun Lizhu tang Chenyan Hu Baili Sun Zileng Huang Lianguo Chen State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China University of Chinese Academy of Sciences Beijing 100049China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430072China

In toxicological studies,experimental animals are generally subjected to dissection to obtain the tissues of concern,which causes great harm to the *** this regard,it is necessary to test and develop a non-invasive strategy to prevent the animals from anthropic injury when achieving scientific ***,zebrafish fecal DNA and mR NA pools were assessed by using metagenomic and transcriptomic analyses based on their potential to diagnose toxicological impairment of polychlorinated biphenyl(PCB)126,a model persistent organic *** results showed that there was abundant zebrafish DNA and mR NA in the feces,which were,however,associated with contrasting profiles of physiological *** compared to DNA fragments,fecal mR NA provided a better representation of zebrafish physiological ***126 exposure dramatically shifted the composition of fecal zebrafish DNA and m RNA as a function of *** differential m RNA caused by PCB126 clearly identified the toxicological fingerprint of *** summary,this study provides preliminary clues about the potential of fecal genes(mRNA in particular)in the development of non-invasive toxicological *** the future,it is expected that more works will be conducted to screen sensitive diagnostic biomarkers from feces to increase the rate and reduce the cost of ecological risk assessment.

关键词： Non-invasive strategy Toxicology Feces DNA mRNA Zebrafish

Ethanol shock enhances the recovery of anthocyanin from lowbush blueberry

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Chinese Journal of Chemical Engineering 2020年第12期28卷 3096-3102页

作者： Nueraili Maimaiti Niyazi Aili M.Kamran Khan Zhigang tang Guoqiang Jiang Zheng Liu Key Laboratory of Industrial Biocatalysis Ministry of EducationBeijing 100084China Department of Chemical Engineering Tsinghua UniversityBeijing 100084China

Deactivation of polyphenol oxidase(PPO)in natural products is essential for downstream processing of functional molecules used as food or food additives,particularly those served as *** the present work,we identified two proteins with PPO activity from lowbush blueberry using ammonium sulphate precipitation and chromatography *** of these proteins was studied using aqueous solutions of ethanol of different *** PPO activity was recovered after ethanol removal for the protein samples previously soaked in a lowconcentration ethanol solution.A complete and unrecoverable deactivation of the proteins was achieved using ethanol with concentration over 70%(v/v),as manifested by the significant changes in circular dichroism(CD)and fluorescence spectroscopy *** on these findings,we propose a new extraction process for blueberry anthocyanin,in which an ethanol shock,*** blueberry fruit in a 70%(v/v)ethanol solution for 1 h,is implemented before subsequent *** new process increases the anthocyanin yield by 55%in comparison to that without the ethanol shock.

关键词： Anthocyanin Lowbush blueberry Ethanol shock Polyphenol oxidase Bioseparation Enzyme deactivation

New insights into the effect of molecular crowding environment induced by dimethyl sulfoxide on the conformation and stability of G-quadruplex

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Chinese Chemical Letters 2023年第3期34卷 326-331页

作者： Yumeng Yang Junfeng Xiang Hongxia Sun Hengwen Chen Hong Zhang Yalin tang Beijing National Laboratory for Molecular Sciences State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Center for Physiochemical Analysis&Measurement Institute of ChemistryChinese Academy of SciencesBeijing 100190China Department of Cardiology Guang’anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China

Various structures of G-quadruplex in biosystems play an important role in different diseases and are often regulated by a variety of molecular crowding environments induced by internal and even external factors(e.g.,a solvent).Dimethyl sulfoxide(DMSO),a universal solvent,has been widely used in biological studies and for drug therapy,but little is known regarding its effect on G-quadruplex structure and ***,we report the influence of molecular crowding environment induced by DMSO on the conformation and stability of G-quadruplex *** show that the G-quadruplex-forming sequences such as human telomeric sequence,which may have diverse conformations in different environments,tend to convert their topologies to parallel structures under the molecular crowding stimulated by ***,DMSO can increase the stability of the parallel and antiparallel topologies,especially the parallel G-quadruplex sequence c-kit,but not the hybrid *** analysis of c-kit using the CD and NMR technique,combined with the unique structural characteristics of c-kit,reveals that the crowding,dehydration and interaction of DMSO are conductive to the formation and stability of the parallel *** present study suggests that,DMSO,a common solvent used in DNA experiments,may have a nonnegligible influence on the structure and stability of G-quadruplex.

关键词： Dimethyl sulfoxide G-quadruplex c-kit Molecular crowding

Bloodletting puncture in the treatment of acute ischemic stroke:protocol for a mixed-method study of a multi-center randomized controlled trial and focus group

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Journal of Traditional Chinese Medicine 2023年第6期43卷 1259-1267页

作者： DAI Zeqi LIAO Xing GUAN Yueyue ZENG Zixiu tang Jun HU Jing Center for Evidence Based Chinese Medicine Institute of Basic Research in Clinical MedicineChina Academy of Chinese Medical SciencesBeijing 100700China Department of Encephalopathy Chongqing Hospital of Traditional Chinese MedicineChongqing 400021China Evidence-based Medicine Center Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing Institute of Traditional Chinese MedicineBeijing 100010China

This study is to investigate the effectiveness and safety of bloodletting puncture(BP)for acute ischemic stroke(AIS)when used in combination with standard treatment,as well as the patients'feelings and attitudes toward the *** is a mixed method research which includes a multi-center,superiority,randomized controlled clinical trial,and focus group interview.A total of 360 AIS participants will be *** will be randomized into one of the following two groups for 7 d:(a)BP with standard treatment group(n=180);(b)standard treatment group(n=180).The primary outcome will be National Institute of Health stroke scale(NIHSS)score at day 7 after *** outcomes will be changes of Glasgow Coma Scale score,NIHSS score,mRS and Traditional Chinese Medicine syndrome score from baseline to 7,14,and 30 d after treatment,recurrence rate and all-cause mortality rate within 30 d,and the safety *** focus group will be conducted with a purposive sample of 1-2 acupuncturists and 1-2 patients respectively at each center at 7 and 30 d after *** designed a mixed method study to evaluate the effect of BP,an acupuncture therapy for patients with *** the findings of this study confirm the effectiveness of BP to reduce the NIHSS score and other related outcomes and patients are willing to accept the therapy,we believe this study will help the implementation of this therapy in clinical practice,and provide new evidence for the treatment of AIS.

关键词： bloodletting punctures ischemic stroke equivalence trial randomized controlled trial focus groups clinical protocols

From protonation & Li-rich contamination to grain-boundary segregation: Evaluations of solvent-free vs. wet routes on preparing Li_(7)La_(3)Zr_(2)O_(12) solid electrolyte

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Journal of Energy Chemistry 2022年第10期31卷 223-239,I0005页

作者： Xiao Huang Yang Lu Yajun Niu Jiawen tang Yongjian Zhou Yan Yang Bingbing Tian SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060GuangdongChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Collaborative Innovation Center for Vessel Pollution Monitoring and Control Dalian Maritime UniversityDalian 116026LiaoningChina

Garnet-type Li_(7)La_(3)Zr_(2)O_(12)(LLZO) has been recognized as a candidate solid electrolyte for high-safety Lianode based solid-state batteries because of its electro-chemical stability against Li-metal and high ionic conductivity. Solvent(e.g., isopropanol(IPA)) has been commonly applied for preparing LLZO powders and ceramics. However, the deterioration of the proton-exchange between LLZO and IPA/absorbed moisture during the mixing and tailoring route has aroused less attention. In this study, a solvent-free dry milling route was developed for preparing the LLZO powders and ceramics. For orthogonal four categories of samples prepared using solvent-free and IPA-assisted routes in the mixing and tailoring processes, the critical evaluation was conducted on the crystallinity, surficial morphology, and contamination of ascalcinated and as-tailored particles, the cross-sectional microstructure of green and sintered pellets,the morphology and electro-chemical properties of grain boundaries in ceramics, as well as the interfacial resistance and performance of Li anode based symmetric batteries. The wet route introduced Li-rich contaminations(e.g., Li OH·H)_(2)O and Li)_(2)CO)_(3)) onto the surfaces of LLZO particles and Li-Ta-O segregations at the adjacent and triangular grain boundaries. The LLZO solid electrolytes prepared through dry mixing in combination with the dry tailoring route without the use of any solvent were found to the optimal performance. The fundamental material properties in the whole LLZO preparation process were found, which are of guiding significance to the development of LLZO powder and ceramic production craft.

关键词： Li_(7)La_(3)Zr_(2)O_(12) Solid electrolyte Solvent-free procedure Ion-exchange Grain boundary Fundamental material properties

Tailoring the Porous Structure of Mono-dispersed Hierarchically Nitrogen-doped Carbon Spheres for Highly Efficient Oxygen Reduction Reaction

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Energy & Environmental Materials 2021年第1期4卷 81-87页

作者： Chengyong Shu Zhuofan Gan Yuyang Hou Ting Zhu Jijun Ma Wei tang Yuping Wu School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China CSIRO Mineral Resources Clayton Vic 3168Australia School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China State Key Laboratory of Materials-Oriented Chemical Engineering School of Energy Science and Engineering and Institute of Advanced MaterialsNanjing Tech UniversityNanjing 211800China

The search for a low-cost metal-free cathode material with excellent mass transfer structure and catalytic activity in oxygen reduction reaction(ORR)is one of the most challenging issues in fuel *** this work,nitrogen-rich mphenylenediamine is introduced into the synthesis of porous carbon spheres to tune the pore structure and nitrogen-doped active *** a result,more pyridinic N and pyrrolic N functional species were observed at the interior and surface of the carbon *** introduction of m-phenylenediamine also regulated the nucleating of precursors,an urchin-like mesoporous surface structure ensures point contact and less agglomeration between each particle was *** optimized proportion of micropores/mesopores and improved nitrogen-contained functional species,the ORR activity can be remarkably *** half-wave potential of this catalyst could achieve to 0.81 V(versus RHE)which is only 42 m V lower than commercial Pt/C ***,the optimized cathode catalyst achieved a 69 m W cm-2 maximum power density when operated in direct methanol fuel cells at room temperature.

关键词： fuel cells metal-free catalysts nitrogen-doped porous carbon oxygen reduction reaction

Rational design of Aspergillus flavus A5p1-immobilized cell system to enhance the decolorization of reactive blue 4(RB4)

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Chinese Journal of Chemical Engineering 2022年第12期52卷 37-44页

作者： Wenbo Yang Qingyun Li Shiqi Guo Shijie Sun Aixing tang Haibo Liu Youyan Liu School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China Guangxi Key Laboratory of Biorefining Nanning 530003China

Anthraquinone dyes are a class of typical carcinogenic and hard-biodegradable organic *** study aimed to enhance the decolorization of anthraquinone dye by rationally designing an expected immobilized *** blue 4(RB4) was used as a substrate model and a previous isolated dyedegrading strain Aspergillus flavus A5pl was purposefully *** the effects of cell attachment and mass transfer,the polyurethane foam(PUF) with open pore structure was selected as the immobilization *** showed that the RB4 decolorization efficiency was significant enhanced after *** to the free mycelium system,the decolorization time of200 mg·L^(-1)RB4 was shortened from 48 h to 28 h by the PUF-immobilized cell ***,the PUF-immobilized system could tolerate RB4 up to 2000 mg-L^(-1).In the packed bed bioreactor(PBBR),an average decolorization efficiency of 93.3% could be maintained by the PUF-immobilized system for26 *** decolorization process of RB4 was well described by the logistic equation and the degradation pathway was *** was found that the higher specific growth rate of the PUF-immobilized cells was one of reasons for the enhanced *** good performance of the PUFimmobilized cell system would make it have potential application value for RB4 bioremediation.

关键词： Aspergillus flavus A5p1 Reactive blue 4(RB4) Polyurethane foam(PUF) Immobilized cell Decolorization

Enamel matrix proteins in promoting saliva lubrication

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Friction 2024年第10期12卷 2298-2312页

作者： Hujun waNG Yue tang Haonan QIU Jingyang HU Yuan SU Jing ZHENG Zhongrong ZHOU Tribology Research Institute School of Mechanical Engineering and Key Laboratory of Advanced Technologies of Materials(Ministry of Education)Southwest Jiaotong UniversityChengdu 610031China

Anti-wear performance of human enamel in the mouth is closely related to the lubrication of salivary *** is well known that the inorganic hydroxyapatite(HA)of the enamel plays an important role in the adsorption and pellicle-forming of salivary proteins on the enamel,but the role of enamel matrix proteins remains *** this study,the adsorption and lubrication behavior of salivary proteins on original,heated,and deproteinated enamel surfaces was comparatively investigated using an atomic force microscopy and nano-indentation/scratch *** with that on the original enamel surface,the adsorption and lubrication behavior of salivary proteins remains almost unchanged on the heated enamel surface(where the enamel matrix proteins are denatured but the size of HA crystalline nanoparticles keeps constant)but exhibits an obvious compromise on the deproteinated enamel surface(where the enamel matrix proteins are removed and agglomeration of HA crystallites occurs).The HA agglomeration weakens the electrostatic interaction of enamel surfaces with salivary proteins to cause a distinct negative influence on the adsorption and pellicle-forming of salivary ***,the negative effect is confirmed with a quartz crystal microbalance with *** summary,by regulating enamel nanostructure for appropriate electrostatic interactions between salivary proteins and enamel surfaces,the enamel matrix proteins play an essential role in the adsorption and pellicle-forming of salivary proteins on human enamel,and then contribute to saliva lubrication,which provides the enamel with an anti-wear *** findings will promote and assist the design of enamel-inspired anti-wear materials.

关键词： enamel matrix proteins hydroxyapatite(HA)crystalline nanoparticles salivary proteins adsorption lubrication