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Highly improved hydrogen storage dynamics of nanocrystalline and amorphous NdMg12-type alloys by mechanical milling

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Journal of Iron and Steel Research International 2020年第10期27卷 1236-1246页

作者： Ying-chun liu Yan Qi Wei zhang Jin-liang Gao Yang-huan zhang China National Institute of Standardization Beijing 100191China Department of Functional Material Research.Central Iron and Steel Research Institute Beijing 100081China Weishan Cisri Rare Earth Materials Co. Ltd.Jining 277600ShandongChina

To improve the hydrogenation and dehydrogenation dynamics of NdMg12-type alloy,we replaced part of Mg with Ni in thesamples and used the ball milling method to prepare NdMg11Ni+x wt.%Ni(x=100,200)*** infuences of millingduration and Ni content on the electrochemical and gascous dynamics of the samples were studied in ***-tion activation cnergies of samples were calculated by using Kissinger and Arrhenius *** conclusions show thatthe dynamic properties of samples are significantly enhanced with the increase in Ni *** the change of the miling duration,the gaseous hydrogenation rate and high rate discharging capability reach the maximal ***,thedehydrogenation dynamics of sample alloys are always enhanced with the prolonging of milling *** concretely,prolonging milling duration from 5 to 60 h improves the dehydrogenation ratio of NdMgNi+100 wt.%Ni alloy from58.03%to 64.81%and that of NdMgNi+200 wt.%Ni alloy from 62.20%to 71.59%.Besides,the enhancement of gaseoushydrogen storage dynamics of the samples is believed to be the result of the declined dehydrogenation activation energyresulted from the increase in milling duration and Ni content.

关键词： NdMg12 alloy Hydrogen storage dynamics Activation energy Mechanical milling Ni addition

Year-round changes in tropospheric nitrogen dioxide caused by COVID-19 in China using satellite observation

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Journal of Environmental Sciences 2023年第10期132卷 162-168页

作者： Zhenyu Luo Hailian Xu Zhining zhang Songxin Zheng huan liu State Key Joint Laboratory of ESPC State Environmental Protection Key Laboratory of Sources and Control of Air Pollution ComplexSchool of EnvironmentTsinghua UniversityBeijing 100084China

The lockdown policy deals a severe blow to the economy and greatly reduces the nitrogen oxides(NOx)emission in China when the coronavirus 2019 spreads widely in early *** we use satellite observations from Tropospheric Monitoring Instrument to study the year-round variation of the nitrogen dioxide(NO_(2))tropospheric vertical column density(TVCD)in *** NO_(2)TVCD reveals a sharp drop,followed by small fluctuations and then a strong rebound when compared to *** the end of 2020,the annual average NO_(2)TVCD declines by only 3.4%in Chinamainland,much less than the reduction of 24.1%in the lockdown *** the basis of quantitative analysis,we find the rebound of NO_(2)TVCD is mainly caused by the rapid recovery of economy especially in the fourth quarter,when contribution of industry and power plant on NO_(2)TVCD continues to *** revenge bounce of NO_(2)indicates the emission reduction of NOx in lockdown period is basically offset by the recovery of economy,revealing the fact that China’s economic development and NOx emissions are still not *** efforts are still required to stimulate low-pollution development.

关键词： COVID-19 Tropospheric NO2 TROPOMI Economy recovery Environment sustainability

MicroRNA通用探针法的建立及布鲁氏菌病患者血浆microRNA-146a的检测

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中国人兽共患病学报 2017年第5期33卷 441-448页

作者：程慧敏魏青青张欢刘金玲韩小虎王大力王兴龙军事兽医研究所军事医学科学院长春130122 沈阳农业大学沈阳110866 中国疾病预防控中心鼠疫布病防治基地白城137000

目的建立一种通用、敏感、特异的microRNA检测方法,用于检测布鲁氏菌病患者血浆microRNA-146a的表达,探讨其作为诊断标识的可能性。方法以microRNA-146a模拟物为待检物,通过正交实验设计,对退火温度、探针浓度、试剂盒选择进行优化,建... 详细信息

目的建立一种通用、敏感、特异的microRNA检测方法,用于检测布鲁氏菌病患者血浆microRNA-146a的表达,探讨其作为诊断标识的可能性。方法以microRNA-146a模拟物为待检物,通过正交实验设计,对退火温度、探针浓度、试剂盒选择进行优化,建立特异敏感的通用检测方法;从布病患者和正常健康人血浆样本提取RNA,应用通用探针法进行检测,比较布病患者血浆microRNA-146a的表达变化。结果建立了优化的通用探针法,与染料法相比特异性更强、扩增范围更大,具有通用检测能力。应用通用探针法检测布鲁氏菌病患者血浆microRNA-146a,发现布病患者血浆中microRNA-146a的表达被抑制(P<0.01),表明其可能作为布病诊断的分子标识。结论经优化的通用探针法是一种通用、敏感、特异的检测方法,可用于microRNA的检测,microRNA-146a可能作为布病诊断的标识分子。

关键词：通用探针法正交设计 microRNA-146a 布鲁氏菌病

Nanocarrier-mediated siRNA delivery:a new approach for the treatment of traumatic brain injury-related Alzheimer's disease

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Neural Regeneration Research 2025年第9期20卷 2538-2555页

作者： Jie Jin Huajing zhang Qianying Lu Linqiang Tian Sanqiao Yao Feng Lai Yangfan Liang Chuanchuan liu Yujia Lu Sijia Tian Yanmei Zhao Wenjie Ren Institute of Disaster and Emergency Medicine Tianjin UniversityTianjinChina Key Laboratory for Disaster Medicine Technology TianjinChina Henan Medical Key Laboratory for Research of Trauma and Orthopedics The Third Affiliated Hospital of Xinxiang Medical UniversityXinxiangHenan ProvinceChina Clinical Medical Center of Tissue Engineering and Regeneration Xinxiang Medical UniversityXinxiangHenan ProvinceChina Institutes of Health Central Plain Xinxiang Medical UniversityXinxiangHenan ProvinceChina School of Public Health Xinxiang Medical UniversityXinxiangHenan ProvinceChina

Traumatic brain injury and Alzheimer's disease share pathological similarities,including neuronal loss,amyloid-βdeposition,tau hyperphosphorylation,blood-brain barrier dysfunction,neuroinflammation,and cognitive ***,traumatic brain injury can exacerbate Alzheimer's disease-like pathologies,potentially leading to the development of Alzheimer's *** offer a potential solution by facilitating the delive ry of small interfering RNAs across the blood-brain barrier for the targeted silencing of key pathological genes implicated in traumatic brain injury and Alzheimer's disease.U nlike traditional approaches to neuro regeneration,this is a molecula r-targeted strategy,thus avoiding non-specific drug *** review focuses on the use of nanocarrier systems for the efficient and precise delive ry of siRNAs,discussing the advantages,challenges,and future *** principle,siRNAs have the potential to target all genes and non-targetable protein s,holding significant promise for treating various *** the various therapeutic approaches currently available for neurological diseases,siRNA gene silencing can precisely"turn off"the expression of any gene at the genetic level,thus radically inhibiting disease progression;however,a significant challenge lies in delivering siRNAs across the blood-brain *** have received increasing attention as an innovative drug delive ry tool fo r the treatment of brain *** are considered a potential therapeutic strategy with the advantages of being able to cross the blood-brain barrier,targeted drug delivery,enhanced drug stability,and multifunctional *** use of nanoparticles to deliver specific modified siRNAs to the injured brain is gradually being recognized as a feasible and effective *** this strategy is still in the preclinical exploration stage,it is expected to achieve clinical translation in the future,creating a new field of molecular tar

关键词： blood-brain barrier cognitive dysfunction exosomes gene silencing immunotherapy inorganic nanomaterials liposome nanoparticles neuroinflammation polymer nanoparticles stem cells

High-resolution sequence architecture and depositional evolution of the Quaternary in the northeastern shelf margin of the South China Sea

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Acta Oceanologica Sinica 2019年第5期38卷 86-98页

作者： Hanyao liu Changsong Lin Zhongtao zhang Bo zhang Jing Jiang Hongxun Tian huan liu School of Ocean Sciences China University of Geosciences Shenzhen Branch of CNOOC Ltd.

The northeastern shelf margin of the South China Sea(SCS) is characterized by the development of large scale foresets complexes since Quaternary. Based on integral analysis of the seismic, well logging and paleontological data, successions since ～3.0 Ma can be defined as one composite sequence, consist of a set of regional transgressive to regressive sequences. They can be further divided into six 3 rd order sequences(SQ0–SQ5) based on the Exxon sequence stratigraphic model. Since ～1.6 Ma, five sets of deltaic systems characterized by development of wedge-shaped foresets complexes or clinoforms had been identified. High-resolution seismic data and the thick foresets allowed further divided of sub-depositional sequences(4 th order) of regression to transgression, which is basically consistent with published stacked benthic foram O-isotope records. Depositional systems identified in the study area include deltaic deposits(inner-shelf deltas and shelf-edge deltas), incised valleys, and slope slumping massive deposits. Since ～1.6 Ma, clinoforms prograded from the southern Panyu Lower Uplift toward the northern Baiyun Depression, shelf slope break migrated seaward, whereas the shelf edge of SQ0 migrated landward. The development of incised valleys in the continental shelf increased upward,especially intensive on the SB3 and SB2. The slumping massive deposits increased abruptly since SB2, which corresponds to the development of incised valleys. The evolution of depositional systems of continental slope mainly controlled by the combined influence of sea level changes, tectonic movements, sediment supply and climate changes. Since ～3.0 Ma, relative sea level of the northern SCS had been experienced transgression(～3.0 Ma BP) to regression(～1.6 Ma BP). The regional regression and maximum transgressions of the composite sequences were apparently enhanced by uplift or subsidence related to tectono-thermal events. In addition,climatic variations including monsoon intensification

关键词： sequence architecture depositional systems continental slope Quaternary Zhujiang(Pearl)River Mouth Basin

Biostimulation-enhanced Biodegradation of Nitrobenzene in Contaminated Groundwater

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Chemical Research in Chinese Universities 2012年第5期28卷 818-823页

作者： AN Yong-lei zhang Lan-ying liu Na zhang Lei GAO huan-fang Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021P R.China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130012P.R.China

In this study, biostimulation technology was used for bioremediation of nitrobenzene-contaminated groundwater by adding a mixture of lactose and phosphate, peptone, and beef extract. During the process of biostimulation, the remediation effectiveness, microbial dehydrogenase activities and microbial densities were investigated; the varieties of microbial community structure and composition were analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis（PCR-DGGE） technique and the relative abundances of nitrobenzene-degrading gene（nbzA） were determined by fluorescence quantitative real-time PCR（RT-PCR）. Findings show that the removal rate of nitrobenzene in groundwater could reach about 60% by biostimulation with lactose and phosphate, 70% with peptone and 68% with beef extract. The microbial dehydrogenase activities and microbial densities were all improved obviously via biostimulation. The results of PCR-DGGE show that the microbial diversities were improved, and more than ten kinds of dominant microorganisms were detected after biostimulation. RT-PCR results show that the relative abundances of nbzA gene of microbes in groundwater were increased significantly, which indicated that biostimulation actually enhanced the growth of nitrobenzene-degrading bacteria. Therefore, biostimulation is a cost-effective and feasible bioremediation technique for nitrobenzene-contaminated groundwater.

关键词： Nitrobenzene Groundwater Biostimulation Polymerase chain reaction-denaturing gradient gel electro-phoresis(PCR-DGGE) Real-time polymerase chain reaction(RT-PCR)

Self-assembling nanoarchitectonics of low dimensional semiconductors for circularly polarized luminescence

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Journal of Materiomics 2023年第4期9卷 683-700页

作者： Xiongbin Wang Xuanyu zhang huan liu Zikang Tang Rui Chen Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen518055China Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao999078China

Recently,the development of materials with circularly polarized luminescence(CPL)has attracted numerous attentions owing to their potential applications in various *** diverse mechanisms for the origin of chiroptical properties in low dimensional semiconductors(LDS),the self-assembly approach provides a powerful technique for acquisition of strong chiroptical *** from this approach,LDS could be endowed with CPL in which the dissymmetry factor,a vital parameter for evaluating the performance of CPL,could be greatly *** this review,state-of-the-art of selfassembled LDS will be *** current challenges and perspectives in this emerging field are also *** review could not only provide insights of the fundamentals of self-assembled chirality,but also shine light for designing CPL-active functional nanomaterials toward their applications based on novel optoelectronic devices.

关键词： Circularly polarized luminescence Chirality Low dimensional semiconductor Self-assembly Optoelectronics

Investigation of optical reflectance from different animal vertebra along the fixation trajectory of pedicle screw in frequency domain

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Journal of Innovative Optical Health Sciences 2020年第1期3卷 132-141页

作者： Yangyang liu huan zhang Ying Tong Zhiyu Qian Weitao Li Department of Biomedical Engineering Nanjing University of Aeronautics and Astronautics Nanjing JiangsuP.R.China College of Information and Communication Engineering Nanjing Institute of Technology Nanjing JiangsuP.R.China

Accurate placement of pedicle screw(PS)is crucial in spinal *** new real-time intra-operative monitoring and navigation methods is an important direction of clinical appli-cation *** this paper,we studied the spectrum along the fixation trajectory of PS in frequency domain to tackle the accuracy *** porcine vertebrae,bovine vertebrae and ovine vertebrae were measured with the near-infrared spectrum(NIR)device to obtain the reflected spectrum from the *** the fixation trajectory of PS,average energy from different groups was calculated and used for identifying different tissues and compared to achieve the optimal recognition *** with the time domain approach,the frequency domain method could divide the spectra measured at different tissue points into different groups more stably and accurately,which could serve as a new method to assist the PS *** results gained from this study are significant to the development of hi-tech medical instruments with independent intellectual property rights.

关键词： Pedicle screw fixation frequency domain optical reflectance vertebra

Enhanced Charge Separation of a-Bi2O3-BiOI Hollow Nanotube for Photodegradation Antibiotic Under Visible Light

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Chemical Research in Chinese Universities 2020年第6期36卷 1227-1233页

作者： zhang Pengfei liu huan LIANG Haiou BAI Jie LI Chunping Chemical Engineering College Inner Mongolia University of TechnologyHohhot 010051P.R.China Inner Mongolia Key Laboratory of Industrial Catalysis Hohhot 010051P.R.China

It is highly desirable to exploit semiconductor materials with high photocatalytic degradation activity,es-pecially bismuth oxyhalide semiconductor photocatalysts with special layered structure and suitable bandgap *** low utilization rate of visible light and high recombination rate of photogenerated electron-hole of BiOl photo catalyst severely restrict its ***,a heterojunction photocatalyst of a-Bi2O3-BiOI hollow nanotube was prepared by electrospinning method,solvothermal method and ion-exchange *** a-Bi2O3-BiOI(BB-4 the stirring time of Bi2O3 in KI solution was 4 h)exhibited the best photocatalytic performance towards degrading the tetracycline hydrochloride(TC)solution,which could remove 85%of TC(10 mg/L)in 2 h under visible light *** estimated hrc of a-BiO-BiOI(BB-4)was ca.3.9 and 1.8 times as much as that of a-Bi2O3 and pure BiOI *** indicated that the formation of a-BizO3-BiOl heterojunction can significantly improve the separatior efficiency of photogenerated electron-hole pairs,therefore the photocatalytic ability was ***,a corresponding photocatalytic mechanism was proposed that Oz radical and holes are the main active components in the photodegradation through trapping experiment.

关键词： BiOI Bi2O3 Heterojunction Electrons-holes separation Photodegradation