检索结果-南通市图书馆

Aggregation of ceAlO_(3) inclusions in heavy ingot of a steel containing 0.007% aluminum

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2024年第8期31卷 1960-1972页

作者： Qiu-yue Zhou Jun-tao ba Lun Zhang Wei chen Ying Ren Li-feng Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina School of Mechanical and materials Engineering North China University of TechnologyBeijing 100144China

The distribution of inclusions at the bottom of a ce-treated heavy steel ingot was detected and *** three-dimensional morphology and spatial distribution of ceAlOs clusters were characterized using the electrolytic extraction and Micro-cT detection.A model of inclusion collision to predict the aggregation of ceAlO_(3) inclusions in the ingot was established and validated by measured *** were mainly ceAlO_(3) and a small amount of ce_(2)O_(2)S in the tundish after cerium *** collision and aggregation of inclusions led to the formation of large clusters in the ingot during the solidification *** slag entrainment inclusions,large ceAO_(3) clusters and small ceAlO_(3) particles were observed from the center to the edge of the ingot *** inclusions were mainly concentrated at the *** number density of inclusions larger than 200μm was 0.21 mm^(-3).The maximum diameter of ceA1O_(3) clusters was 1340μ*** the edge to the radial center and from the bottom to the top,the average diameter of inclusions gradually increased due to the longer solidification time of the ingot.

关键词： Inclusion Heavy ingot cerium treatment collision

Integrative multi-omics approaches reveal that Asian cultivated rice domestication influences its symbiotic relationship with arbuscular mycorrhizal fungi

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2期34卷 315-327页

作者： Lei TIAN Jilin WANG Hongping cHEN Weiqiang LI Lam-son Phan TRAN chunjie TIAN Key Laboratory of Mollisols Agroecology State Key Laboratory of Black Soils Conservation and UtilizationNortheast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China Rice Research Institute Jiangxi Academy of Agricultural SciencesNanchang 330200China Institute of Genomics for crop Abiotic Stress Tolerance Department of Plant and Soil ScienceTexas Tech UniversityLubbock TX 79409USA

Potential changes in the symbiotic relationship between rice(Oryza sativa)and microorganisms have occurred during the domestication of Asian cultivated rice(***)from common wild rice(Oryza rufipogon)and in response to global climate change,along with evolving adaptations to the *** potential genes may express differently or dominate the symbiotic relationships between arbuscular mycorrhizal fungi(AMF)and plants,which may be beneficial to rice *** date,research on this important topic has been *** this study,we aimed to examine the symbiotic relationships of Asian common wild and cultivated rice species with *** conducting a comparative metagenomic analysis of the rhizospheres of wild and cultivated rice species,we identified differences in Rhizophagus intraradices-related genes associated with wild and cultivated rice,as well as functional genes of ***,we obtained root-related genes associated with AMF from transcriptome data of rice *** results collectively suggest that ***-related genes in the rhizosphere of wild rice may be more conducive to its ***,bacteria from the Nitrosomonadaceae and Nitrospiraceae families identified in the rhizosphere of wild rice exhibited positive correlations with ***-related genes with protein identifiers 1480749 and1871253,which may indicate that nitrobacteria can enhance the functions of *** in association with wild ***,in a case study using comparative transcriptome analysis of root samples obtained from ***-inoculated wild and cultivated rice plants,we found significantly higher expression levels of the strigolactone pathway-related genes dWARF3(d3)and dWARF14(d14)in ***-inoculated common wild rice than in ***-inoculated cultivated *** study provides a theoretical basis for identifying the effects of domestication on mycorrhizal symbiosis-related genes,which could be promoted in wi

关键词： Rhizophagus intraradices root-related gene symbiotic effect strigolactone wild rice

Effect of organic mineral supplementation in reducing oxidative stress in Holstein calves during short‑term heat stress and recovery conditions

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2024年第2期15卷 812-825页

作者： A-Rang son Seon-Ho Kim mahfuzul Islam Michelle Miguel Ye Pyae Naing Sang-Suk Lee Ruminant Nutrition and Anaerobe Laboratory Department of Animal Science and TechnologySunchon National UniversitySuncheon 57922Korea department of Microbiology and Parasitology Sher-e-Bangla Agricultural UniversityDhaka 1207Bangladesh

background This study investigated the effects of inorganic and organic minerals on physiological responses,oxidative stress reduction,and rumen microbiota in Holstein bull calves(123.81±9.76 kg;5 months old)during short-term heat stress(HS)and recovery *** Holstein calves were randomly assigned to four treatment groups:no mineral supplementation(con),inorganic minerals(IM),organic minerals(OM),and high-concentration organic minerals(HOM)and two thermal environments(HS and recovery)using 4×2 factorial arrangement in a crossover design of four periods of 35 *** were maintained in a temperature-controlled *** experimental period consisted of 14 d of HS,14 d of recovery condititon,and a 7-d washing *** Body temperature and respiration rate were higher in HS than in the recovery conditions(Pconcentration in serum was high in the HOM-supplemented calves in both HS(90.38μg/dL)and recovery periods(102.00μg/dL)(Pduring the HS period,the serum cortisol was 20.26 ng/mL in the HOM group,which was 5.60 ng/mL lower than in the control group(Pdant status was the highest in the OM group(2.71 mmol Trolox equivalent/L),followed by the HOM group during HS,whereas it was highest in the HOM group(2.58 mmol Trolox equivalent/L)during the recovery period(Pma malondialdehyde and HSP70 levels were decreased by HOM supplementation during the HS and recovery periods,whereas SOd and GPX levels were not significantly affected(P>0.05).The principal coordinate analysis represented that the overall rumen microbiota was not influenced by mineral supplementation;however,temperature-induced microbial structure shifts were indicated(PERmaNOVA:Pcutes and Actinobacteria decreased,whereas Fibrobacteres,Spirochaetes,and Tenericutes increased(Pder HS *** genus Treponema increased under HS conditions,while christensenella was higher in recovery conditions(Pconc

关键词： Antioxidant status Heat stress Holstein bull calves Organic mineral supplementation Oxidative stress

Azimuthal rotation-controlled nanoinscribing for continuous patterning of period-and shapetunable asymmetric nanogratings

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第3期10卷 207-218页

作者： Useung Lee Hyein Kim dong Kyo Oh Nayeong Lee Jonggab Park Jaewon Park Hyunji son Hyunchan Noh Junsuk Rho Jong G.Ok department of Mechanical and Automotive Engineering Seoul National University of Science and TechnologySeoul 01811Republic of Korea department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea department of chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea POScO-POSTEcH-RIST convergence Research center for Flat Optics and Metaphotonics Pohang 37673Republic of Korea National Institute of Nanomaterials Technology(NINT) Pohang 37673Republic of Korea Present address:department of Mechanical Engineering Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea Research Team Hyundai Motor Group150 Hyundaiyeonguso-roHwaseong-siGyeonggi 18280Republic of Korea

We present an azimuthal-rotation-controlled dynamic nanoinscribing(ARc-dNI)process for continuous and scalable fabrication of asymmetric nanograting structures with tunable periods and shape profiles.A sliced edge of a nanograting mold,which typically has a rectangular grating profile,slides over a polymeric substrate to induce its burrfree plastic deformation into a linear *** this continuous nanoinscribing process,the“azimuthal angle,”that is,the angle between the moving direction of the polymeric substrate and the mold’s grating line orientation,can be controlled to tailor the period,geometrical shape,and profile of the inscribed *** modulating the azimuthal angle,along with other important ARc-dNI parameters such as temperature,force,and inscribing speed,we demonstrate that the mold-opening profile and temperature-and time-dependent viscoelastic polymer reflow can be controlled to fabricate asymmetric,blazed,and slanted nanogratings that have diverse geometrical profiles such as trapezoidal,triangular,and ***,period-and profile-tunable ARc-dNI can be utilized for the practical fabrication of diverse optical devices,as is exemplified by asymmetric diffractive optical elements in this study.

关键词： tunable asymmetric rotation

Alternative technology for the recovery of butyl acetate with low concentration:high capacity adsorbent and high efficiency adsorption

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green chemical Engineering 2024年第2期5卷 236-244页

作者： chi ma Lihong Zhao Zhengxin mao Hao Su Qingfen Liu cAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China School of chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Industrial pharmaceutical wastewater usually contains butyl acetate(ba)with a concentration of 1 wt%-7 wt%,and the traditional method for ba recovery is distillation with high energy *** method is developed to recover ba with low concentration for the high efficiency and low energy *** polar polyacrylate resins with macroporous structure of 233.1 nm and average particle size of about 526.5μm are successfully synthesized by suspension polymerization and used for the ba adsorption and *** maximum adsorption capacity reaches 171.1 mg g^(-1)with relative standard deviation(RSd)value of 0.2%,which is more than twice the results in the *** ba desorption rate is 97.0%at 100℃with RSd value of 0.4%,and the resins are beneficial to the reuse in the adsorption-desorption *** adsorption thermodynamics and kinetics are investigated,and the ba adsorption is a spontaneous and endothermic process with the increase of disorder *** process is mainly contributed by physical absorption and agree well with Freundlich model and pseudo-first-order adsorption kinetic *** adsorption method avoids boiling a large amount of wastewater and hopefully provides a novel alternative technology for the ba recovery.

关键词： Butyl acetate recovery Resin adsorption desorption Thermodynamics Kinetics

M1-polarized macrophage-derived cellular nanovesicle-coated lipid nanoparticles for enhanced cancer treatment through hybridization of gene therapy and cancer immunotherapy

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2024年第7期14卷 3169-3183页

作者： Ha Eun Shin Jun-Hyeok Han Seungyong Shin Ga-Hyun bae Boram son Tae-Hyung Kim Hee Ho Park chun Gwon Park Wooram Park department of Integrative Biotechnology Sungkyunkwan University(SKKU)SuwonGyeonggi 16419Republic of Korea deparment of Inteligent Precision Healthcare convergence SKKUSuwonGyeonggi 16419Republic of Korea department of MetaBioHealth SKKU Institute for ConvergenceSKKUSuwonGyeonggi 16419Republic of Korea department of Bioengineering Hanyang UniversitySeoul 04763Republic of Korea department of Integrative Engineering Chung-Ang UniversitySeoul 06974Republic of Korea department of Biomedical Engineering SKKUSuwonGyeonggi 16419Republic of Korea Korea Institute of Science and Technology(KIST) Seoul 02792Republic of Korea

Optimum genetic delivery for modulating target genes to diseased tissue is a major obstacle for profitable gene *** nanoparticles(LNPs),considered a prospective vehicle for nucleic acid delivery,have demonstrated efficacy in human use during the cOVId-19 *** study introduces a novel biomaterial-based platform,M1-polarized macrophage-derived cellular nanovesicle-coated LNPs(M1-c-LNPs),specifically engineered for a combined gene-immunotherapy approach against solid *** dual-function system of M1-c-LNPs encapsulates Bcl2-targeting siRNA within LNPs and immune-modulating cytokines within M1 macrophage-derived cellular nanovesicles(M1-NVs),effectively facilitating apoptosis in cancer cells without impacting T and NK cells,which activate the intratumoral immune response to promote granule-mediating killing for solid tumor *** retention within tumor was observed upon intratumoral administration of M1-c-LNPs,owing to the presence of adhesion molecules on M1-NVs,thereby contributing to superior tumor growth *** findings represent a promising strategy for the development of targeted and effective nanoparticle-based cancer genetic-immunotherapy,with significant implications for advancing biomaterial use in cancer therapeutics.

关键词： Genetic-immunotherapy M1 macrophage-derived cellular nanovesicles Lipid nanoparticles(LNPs) Gene therapy siRNA cancer immunotherapy Solid tumor Tumor microenvironment(TME)

基于动态知识流动特征的有向技术融合预测方法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

情报杂志 2024年第8期43卷 152-159,41页

作者：陈稳马亚雪巴志超李纲南京大学数据智能与交叉创新实验室南京210023 南京大学数据管理创新研究中心苏州215163 南京大学信息管理学院南京210023 武汉大学信息管理学院武汉430072

[研究目的]基于动态知识流动特征对有向的技术融合关系进行预测,有助于提高企业的研发效率及科技管理部门对科技资源的合理分配。[研究方法]首先,将IPc前4位代码作为技术单元,基于专利中主分类号与副分类号提取技术间的有向知识流动关系... 详细信息

[研究目的]基于动态知识流动特征对有向的技术融合关系进行预测,有助于提高企业的研发效率及科技管理部门对科技资源的合理分配。[研究方法]首先,将IPc前4位代码作为技术单元,基于专利中主分类号与副分类号提取技术间的有向知识流动关系;然后,借鉴关联规则挖掘算法从重要性、强度和依赖度3个维度对知识流动关系进行筛选,将满足指标阈值的知识流动关系作为有向技术融合关系;最后,将有向技术融合关系预测转化为有监督的二分类任务,以机器学习算法为模型基础,结合前两个时期的技术间知识流动特征及其时序变化特征,预测下一个时期内的技术间是否存在技术融合关系。[研究结论]增材制造领域的实证分析结果显示,以代价敏感机器学习算法为预测算法,基于前两个时期的技术间知识流动特征及其时序变化特征可以有效预测下一阶段中的技术融合。随着技术的发展,技术间的单向融合愈发频繁,并逐渐演变为技术双向融合,甚至呈现多技术融合的现象。

关键词：技术融合专利分类号知识流技术预测增材制造机器学习知识流动特征

Mixed-dimensional stacked nanocomposite structures for a specific wavelength-selectable ambipolar photoresponse

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第6期17卷 5549-5558页

作者： Young Jae Park Jaeho Shim Joo song Lee Kyu Seung Lee Ji-Yeon Kim Kang Bok Ko Sang-Youp Yim Seongjun Kim Hoon-Kyu Shin donghee Park Yong Ju Yun dong Ick son Institute of Advanced composite materials Korea Institute of Science and TechnologyJeollabuk-do 55324Republic of Korea National Institute for Nanomaterials Technology Pohang University of Science and TechnologyGyeongsangbuk-do 37673Republic of Korea department of Semiconductor Science and Technology Semiconductor Physics Research CenterJeonbuk National UniversityJeonju 54896Republic of Korea Advanced Photonics Research Institute Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea center for Opto-Electronic materials and devices Post-Silicon Semiconductor InstituteKorea Institute of Science and TechnologySeoul 02792Republic of Korea Graduate School of Energy and Environment(KU-KIST Green School) Korea UniversitySeoul 02841Republic of Korea KIST School Department of Nanomaterials and Nano ScienceUniversity of Science and Technology(UST)Daejeon 34113Republic of Korea

Mixed-dimensional composite structures using zero-dimensional(0d)quantum dots(Qds)and two-dimensional(2d)transition metal dichalcogenides(TMds)materials are expected to attract great interest in optoelectronics due to the potential to generate new optical ***,we report on the unique optical characteristics of a devices with mixed dimensional vertically stacked structures based on tungsten diselenide(WSe_(2))/cdSeS Qds monolayer/molybdenum disulfide(MoS_(2))(2d/0d/2d).Specifically,it exhibits an ambipolar photoresponse characteristic,with a negative photoresponse observed in the 400-600 nm wavelength range and a positive photoresponse appeared at 700 nm *** resulted in the high negative responsivity of up to 52.22 ma·W^(−1)under 400 nm,which is 163 times higher than that of the photodetector without cdSeS *** also demonstrated the negative photoresponse,which could be due to increased carrier collision probability and non-radiative *** modeling and simulation reveal that Auger recombination among the types of non-radiative recombination is the main cause of negative photocurrent ***,we discovered ambipolar photoresponse near a specific wavelength corresponding to the energy of quantum *** study revealed interesting phenomenon in the mixed low-dimensional stacked structure and paved the way to exploit it for the development of innovative photodetection materials as well as for optoelectronic applications.

关键词： mixed-dimension quantum dot heterostructure photodetector ambipolar photoresponse

Selective butyric acid production from cO_(2)and its upgrade to butanol in microbial electrosynthesis cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2024年第1期17卷 119-127页

作者： Meritxell Romans-casas Laura Feliu-Paradeda Michele Tedesco Hubertus V.M.Hamelers Lluis bañeras M.dolors balaguer SebastiàPuig Paolo dessì Institute of the Environment University of Girona.Campus MontiliviCarrer Maria Aurélia Capmany 69E-17003GironaSpain Molecular Microbial Ecology Group Institute of Aquatic EcologyUniversity of GironaMaria Aurelia Capmany 4017003GironaSpain Wetsus European Centre of Excellence for Sustainable Water TechnologyOostergoweg 98911MALeeuwardenthe Netherlands

Microbial electrosynthesis(MES)is a promising carbon utilization technology,but the low-value products(i.e.,acetate or methane)and the high electric power demand hinder its industrial *** this study,electrically efficient MES cells with a low ohmic resistance of 15.7 mU m^(2)were operated galvanostatically in fed-batch mode,alternating periods of high cO_(2)and H2 *** promoted acetic acid and ethanol production,ultimately triggering selective(78%on a carbon basis)butyric acid production via chain *** average production rate of 14.5 g m^(-2)d^(-1)was obtained at an applied current of 1.0 or 1.5 ma.cm^(-2),being Megasphaera *** key chain elongating *** a second cell with the catholyte containing the enriched community resulted in butyric acid production at the same rate as the previous cell,but the lag phase was reduced by 82%.Furthermore,interrupting the cO_(2)feeding and setting a constant pH2 of 1.7e1.8 atm in the cathode compartment triggered solventogenic butanol production at a pH below *** efficient cell design resulted in average cell voltages of 2.6e2.8 V and a remarkably low electric energy requirement of 34.6 kWhel kg1 of butyric acid produced,despite coulombic efficiencies being restricted to 45%due to the cross-over of O_(2)and H2 through the *** conclusion,this study revealed the optimal operating conditions to achieve energy-efficient butyric acid production from cO_(2)and suggested a strategy to further upgrade it to valuable butanol.

关键词： Biocathode Bioelectrochemical system chain elongation Hydrogen partial pressure Megasphaera