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微酸性电解水处理对兔肉冷藏期间品质及微生物菌群的影响

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食品与发酵工业 2024年第10期50卷 127-133页

作者：左红吴周林张佳敏何薇张弛杨思艺王卫成都大学肉类加工四川省重点实验室四川成都610106

为探究微酸性电解水(slightly acidic electrolytic water,sAEW)对兔肉贮藏品质的影响,将新鲜兔肉分别使用sAEW浸泡处理5 min(sWa)、sAEW浸泡处理10 min(sWb)、无菌水浸泡处理5 min(PW)和未经浸泡处理为对照组(CK)。处理后样品使用托盘... 详细信息

为探究微酸性电解水(slightly acidic electrolytic water,sAEW)对兔肉贮藏品质的影响,将新鲜兔肉分别使用sAEW浸泡处理5 min(sWa)、sAEW浸泡处理10 min(sWb)、无菌水浸泡处理5 min(PW)和未经浸泡处理为对照组(CK)。处理后样品使用托盘覆膜,置于4℃冷藏。每2 d检测样品的总挥发性盐基氮(total volatile base nitrogen,TVB-N)含量、硫代巴比妥酸(thiobarbituric acid,TBA)含量、pH值、色度、感官及微生物菌群结构的组成及变化。结果表明,sAEW浸泡处理兔肉在冷藏期间pH值、TVB-N值、TBA值上升速率明显低于CK组和PW组,且能够更好地保持兔肉原有色泽以及感官品质,当贮藏到第8天时,发现TVB-N值在CK组[(14.98±0.42)mg/100 g]和PW组[(14.76±0.40)mg/100 g]显著高于sWa组[(13.58±0.40)mg/100 g]和sWb组[(12.66±0.43)mg/100 g]。结合16s rdNA测序分析,sAEW可抑制兔肉冷藏期间腐败菌拟杆菌属(Bacteroid.s.、假单胞菌属(Pseudzaomonas)的生长繁殖,有效延缓冷藏兔肉腐败变质且sAEW处理10 min减菌效果更佳。该研究结果为sAEW在兔肉贮藏保鲜中的应用提供了理论参考。

关键词：微酸性电解水兔肉冷藏菌群组成品质变化

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贵州省生态渔业高质量发展路径研究

上海海洋大学学报 2024年第1期33卷 263-274页

作者：徐思雨崔巍王建军李正友冯建彬上海海洋大学海洋文化与法律学院上海201306 上海交通大学医学院附属第六人民医院上海200233 贵州省农业农村厅贵州贵阳550001 贵州省水产研究所贵州贵阳550025 上海海洋大学水产与生命学院上海201306

生态渔业高质量发展是我国渔业发展的战略性目标,研究贵州省生态渔业高质量发展的路径对长江流域和珠江流域贵州段的生态修复,对巩固和扩大脱贫攻坚成果、全面推进乡村振兴、建设生态文明先行示范区等省级决策部署以及共建“一带一路”... 详细信息

生态渔业高质量发展是我国渔业发展的战略性目标,研究贵州省生态渔业高质量发展的路径对长江流域和珠江流域贵州段的生态修复,对巩固和扩大脱贫攻坚成果、全面推进乡村振兴、建设生态文明先行示范区等省级决策部署以及共建“一带一路”和碳达峰、碳中和等国家重大战略任务具有重要意义。本研究通过对贵州省生态渔业发展现状走访调研,结合《中国渔业统计年鉴》数据分析,对贵州省“十三五”期间生态渔业发展成效、制约因素及发展机遇进行了梳理。依据贵州省生态渔业发展指导性文件《省人民政府办公厅关于加快推进生态渔业高质量发展的意见》和贵州省生态渔业产业特点,探索性提出贵州省生态渔业高质量发展的理念和基本原则。并进一步从拓展生态渔业空间、推广多样化生态养殖模式、推动产业融合发展、做大做强休闲渔业、加大渔业科技创新投入及完善生态渔业制度保障体系6个方面提出贵州省生态渔业高质量发展的建议与对策,期望为贵州省生态渔业高质量发展提供参考。

关键词：贵州省生态渔业高质量发展发展路径

克里雅河流域中游绿洲蒸散发的时空演变与驱动因素分析

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测绘通报 2024年第3期 31-36,139页

作者：王冉冉吕光辉何学敏李进宝新疆大学生态与环境学院新疆乌鲁木齐830017 绿洲生态教育部重点实验室新疆乌鲁木齐830017 新疆精河温带荒漠生态系统教育部野外科学观测研究站新疆精河833300

蒸散发是评估荒漠绿洲水热循环的关键因素,其时空变化监测及驱动力研究可为水资源的精准调控与生态环境保护提供科学依据。以克里雅河流域中游绿洲地区为研究区域,本文基于Landsat遥感影像与sEBs模型分析了2010—2022年蒸散发的时空变化... 详细信息

蒸散发是评估荒漠绿洲水热循环的关键因素,其时空变化监测及驱动力研究可为水资源的精准调控与生态环境保护提供科学依据。以克里雅河流域中游绿洲地区为研究区域,本文基于Landsat遥感影像与sEBs模型分析了2010—2022年蒸散发的时空变化,通过蒸发皿实测数据和Penman-Monteith模型进行了估算结果的精度验证,并进一步探讨了蒸散发的影响因素。结果表明:①蒸散发的sEBs模拟值与蒸发皿观测值的相关系数和R 2分别为0.93和0.87,RMsE为0.96 mm/d;与彭曼公式观测值的相关系数和R 2分别为0.90和0.81,RMsE为0.64 mm/d。②2010—2022年的实际蒸散发呈下降趋势,其变化速率为14.75 mm/a;在春季、夏季和秋季呈下降趋势,在冬季则呈上升趋势。③蒸散发的空间异质性明显,高值主要集中在克里雅河沿岸附近,低值则分布在绿洲边缘地区的沙地;近13年整个研究区约有70.2%的像元呈无显著下降趋势,10.4%的像元呈显著下降趋势。④蒸散发与气温、气压、日照时数、地表温度和NdVI呈显著相关关系,与风速和地表反照率呈弱相关关系。总体而言,研究结果能够较好地模拟克里雅河流域中游绿洲的蒸散发时空异质特征,有助于流域水资源合理规划与调控政策的制定。

关键词：克里雅河流域蒸散发 sEBs模型 Landsat Mann-Kendall趋势分析影响因子

Light-driven photothermocatalytic performance of the Pt/Co3O4 catalyst for toluene oxidation

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Progress in Natural science:Materials International 2023年第4期33卷 526-533页

作者： Yijie shi Ying Feng Zhiwei wang Xun wang Yunpeng Jiang Jiguang deng Hongxing dai Yuxi Liu Beijing Key Laboratory for Green Catalysis and.s.paration Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology Faculty of Environment and Life

Light-driven photothermocatalytic oxidation is a promising method for the elimination of volatile organic compounds(VOCs). The Co3O4, 0.46 Pt/Co3O4and 0.97 Pt/Co3O4catalysts were fabricated via the simple molten salt and incipient wetness impregnation method. Compared with Co3O4and 0.46 Pt/Co3O4, the 0.97 Pt/Co3O4catalyst showed higher photothermocatalytic performance for toluene oxidation under simulated.s.lar irradiation intensity of 900 mW cm-2, with the toluene conversion and CO2yield being up to 98.3 % and 96.0 %, respectively. The better activity was ascribed to its outstanding strong light absorption and low temperature ***, 0.97 Pt/Co3O4also exhibited an excellent photothermocatalytic stability and H2O resistance. The Vis-IR light played a key role in the photothermocatalytic oxidation of toluene in the whole solar spectrum. This work benefited the synthesis of catalysts with good photothermocatalytic activity for environment friendly treatment of VOCs.

关键词： Light-driven photothermocatalytic oxidation Toluene oxidation Particulate Pt catalyst Co_3O_4 octahedron Whole solar spectrum

Evaluation of Two Momentum Control Variable schemes and Their Impact on the Variational Assimilation of Radar Wind data:Case study of a squall Line

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Advances in Atmospheric sciences 2016年第10期33卷 1143-1157页

作者： Xin LI Mingjian ZENG Yuan wang Wenlan wang Haiying WU Haixia MEI Jiangsu Research Institute of Meteorological sciences Nanjing 210009China Key Laboratory of Mesoscale severe Weather/MOE and School of Atmospheric SciencesNanjing UniversityNanjing 210023China Jiangsu Provincial Observatory Nanjing 210008China

different choices of control variables in variational assimilation can bring about different influences on the analyzed atmospheric state. Based on the WRF model＇s three-dimensional variational assimilation system, this study compares the be- havior of two momentum control variable options-streamfunction velocity potential （ψ-χ） and horizontal wind components （U-V）-in radar wind data assimilation for a squall line case that occurred in Jiangsu Province on 24 August 2014. The wind increment from the single observation test shows that the ψ-χ control variable scheme produces negative increments in the neighborhood around the observation point because streamfunction and velocity potential preserve integrals of velocity. On the contrary, the U-V control variable scheme objectively reflects the information of the observation itself. Furthermore, radial velocity data from 17 doppler radars in eastern China are assimilated. As compared to the impact of conventional observation, the assimilation of radar radial velocity based on the U-V control variable scheme significantly improves the mesoscale dynamic field in the initial condition. The enhanced low-level jet stream, water vapor convergence and low-level wind.s.ear result in better squall line forecasting. However, the ψ-χ control variable scheme generates a d.s.ontinuous wind field and unrealistic convergence/divergence in the analyzed field, which lead to a degraded precipitation forecast.

关键词： three-dimensional variational assimilation momentum control variable doppler radar data squall line

Nonlinear optical selection rule based on valley-exciton locking in monolayer ws2

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Light(science & Applications) 2015年第1期4卷 16-21页

作者： Jun Xiao Ziliang Ye Ying wang Hanyu Zhu Yuan wang Xiang Zhang NsF Nanoscale science and Engineering Center(NsEC) University of California at BerkeleyBerkeleyCAUSA Material sciences division Lawrence Berkeley National LaboratoryBerkeleyCAUSA department of Physics King Abdulaziz UniversityJeddahSaudi Arabia

Optical selection rules fundamentally determine the optical transitions between energy states in a variety of physical systems,from hydrogen atoms to bulk crystals such as gallium *** rules are important for optoelectronic applications such as lasers,energy-d.s.ersive X-ray spectroscopy,and quantum ***,single-layer transition metal dichalcogenid.s.have been found to exhibit valleys in momentum space with nontrivial Berry curvature and excitons with large binding ***,there has been little study of how the unique valley degree of freedom combined with the strong excitonic effect influences the nonlinear optical ***,we report the d.s.overy of nonlinear optical selection rules in monolayer Ws2,an important candidate for visible 2d optoelectronics because of its high quantum yield and large direct *** experimentally demonstrated this principle for second-harmonic generation and two-photon luminescence(TPL).Moreover,the circularly polarized TPL and the study of its dynamics evince a sub-ps interexciton relaxation(2p R 1s).The d.s.overy of this new optical selection rule in a valleytronic 2d.s.stem not only considerably enhances knowledge in this area but also establishes a foundation for the control of optical transitions that will be crucial for valley optoelectronic device applications such as 2d valley-polarized THz sources with 2p–1s transitions,optical switches,and coherent control for quantum computing.

关键词： nonlinear optical selection rule 2d materials 2p–1s exciton relaxation valley exciton

Microstructural evolution and.s.perelastic properties of ultrafine-graine d NiTi-base d.s.ape memory alloy via sintering of amorphous ribbon precursor

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Journal of Materials science & Technology 2023年第7期138卷 80-92页

作者： W.s.Cai H.Z.Lu H.Z.Li Z.Liu H.B.Ke W.H.wang C.Yang National Engineering Research Center of Near-net-shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou 510640China songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

NiTi-based.s.ape memory alloys(sMAs)are considered as cutting-edge intelligent functional ***,it remains a great challenge to obtain ultrafine-grained(UFGed)bulk materials with mm-scale size as well as outstanding superelastic ***,UFGed bulk Ti_(35)Zr_(15)Ni_(35)Cu_(15)NiTi-based.s.A is successfully prepared via spark plasma sintering of amorphous ribbon precursor at different sintering temperatures,and microstructural evolution and.s.perelastic properties are symmetrically *** is found that its grain size ranges from UFG to micro-grain with increased.s.ntering temperature regard-less of the predominant B2 matrix in all bulk ***,the orientation relationships between B2 matrix and nano-scale fcc(Ti,Zr)_(2)Ni precipitate evolve from coherent to ***,the UFGed.s.mples exhibit perfect superelasticity with the high recoverable strain of∼5.8%,the stable recov-ery rate above 99%,and the great critical stress inducing martensitic transformation higher than 1 GPa,far superior to the corresponding ones of suction-cast micro-grained TiZrNiCu ***,the perfect superelasticity is attributed to the good resistance to d.s.ocation slip or grain boundary slip by residual nano-scale amorphous phase or secondary phase of coherent and.s.mi-coherent fcc(Ti,Zr)_(2)Ni *** addition,the gentle superelastic plateau is associated to the favorable transfer stress and the strong ability to accommodate d.s.ocation movement,which is generated by the coherent interface between nano-scale fcc(Ti,Zr)_(2)Ni and UFGed B2 *** results suggest that spark plasma sintering of amorphous alloy precursor is a feasible route to obtaining excellent superelasticity in NiTi-based.s.As.

关键词： shape memory alloy Amorphous alloy Microstructure superelasticity

基于肠道菌群探讨醋炙对乳香治疗溃疡性结肠炎的增效机制

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中国实验方剂学杂志 2024年第15期30卷 182-191页

作者：鲁文洁彭诗涛宋志前刘振丽王淳宁张弛中国中医科学院中医基础理论研究所北京100700

目的:基于肠道菌群角度探讨乳香醋炙前后对甘氨脱氧胆酸(GdCA)干预溃疡性结肠炎(UC)小鼠的改善作用及其醋炙增效机制。方法:30只C57BL/6J雄性小鼠随机分为正常组、模型组、GdCA组、乳香组(1.5 g·kg^(-1))、醋乳香组(1.5 g·kg^(-1)),每... 详细信息

目的:基于肠道菌群角度探讨乳香醋炙前后对甘氨脱氧胆酸(GdCA)干预溃疡性结肠炎(UC)小鼠的改善作用及其醋炙增效机制。方法:30只C57BL/6J雄性小鼠随机分为正常组、模型组、GdCA组、乳香组(1.5 g·kg^(-1))、醋乳香组(1.5 g·kg^(-1)),每组6只。正常组自由饮水,其余组按周期自由摄入2%葡聚糖硫酸钠(d.s.建立UC小鼠模型,造模期间GdCA组、乳香组、醋乳香组腹腔注射GdCA(0.05 g·kg^(-1))进行干预;于造模后第13天起,乳香组、醋乳香组灌胃给予相应剂量药物,1次/d,连续给药36 d,期间记录小鼠体质量,评估疾病活动指数(dAI)。第48天,收集粪便进行16s r RNA和宏基因组测序分析肠道菌群变化。第49天取小鼠结肠,采用苏木素-伊红(HE)染色法观察小鼠结肠组织病变,酶联免疫吸附测定法(ELIsA)检测小鼠血清中肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-1β、IL-6含量。采用spearman相关性分析探讨差异菌种和炎症因子水平的相关性。结果:与正常组比较,模型组体质量显著降低(PdAI评分明显升高(PdCA组小鼠体质量显著降低、dAI显著升高,TNF-α、IL-1β和IL-6水平显著升高(PdCA组比较,乳香组、醋乳香组体质量明显升高、dAI评分显著降低、TNF-α、IL-6和IL-1β水平明显降低(PdCA干预后UC小鼠Chao1指数显著升高(Pshannon指数明显降低(PdCA干预后UC小鼠肠道菌群结构变化。菌群测序结果显示,与正常组比较,模型组厚壁菌门/拟杆菌门值明显升高(PdCA组厚壁菌门/拟杆菌门值明显升高(Pd.s.intestinalis相对丰度明显降低(Pd.s.intestinalis相对丰度与TNF-α、IL-6、IL-1β水平呈负相关;Prevotella_sp_CAG873、Bacteroid.s.sp_CAG927、Bacteroidales_bacterium_52_46、Bacteroidales_bacterium相对丰度与TNF-α、IL-6、IL-1β水平呈正相关。结论:GdCA可加重UC结肠炎症,乳香与醋乳香对于GdCA介导的UC均具有改善作用,以醋乳香作用更强,其作用机制可能与调节肠道有益菌和致病菌的丰度和结构、降低炎症因子水平有关。

关键词：乳香醋炙溃疡性结肠炎结合型胆汁酸甘氨脱氧胆酸肠道菌群增效机制

Magnetic properties and critical behavior of quasi-2d layered Cr_(4)Te_(5)thin film

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Frontiers of physics 2023年第1期18卷 141-151页

作者： Hao Liu Jiyu Fan Huan Zheng Jing wang Chunlan Ma Haiyan wang Lei Zhang Caixia wang Yan Zhu Hao Yang department of Applied Physics College of PhysicsNanjing University of Aeronautics and AstronauticsNanjing 211106China Key Laboratory of Aerospace Information Materials and Physics(NUAA) MIITNanjing 211106China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Mathematics and PhysicsSuzhou University of Science and TechnologySuzhou 215009China school of Materials Engineering Purdue UniversityWest LafayetteIN 47907USA High Magnetic Field Laboratory Chinese Academy of SciencesHefei 230031China College of Physics science and Technology Yangzhou UniversityYangzhou 225002China

Quasi-2d layered Cr4Te5 thin film has attracted great attention because it possesses the high Curie temperature close to room temperature and relatively large saturation ***,the magnetic interactions and the nature of magnetic phase transition in the Cr4Te5 film have not been explored *** this paper,we focused on the critical behavior of its magnetic phase transition through the epitaxial Cr4Te5 film fabricated by pulsed laser deposition(PLd).The final critical exponentsβ=0.359(2)andγ=1.54(2)were obtained by linear extrapolation together with ArrottNoakes equation of state,and their accuracy was confirmed by using the Widom scaling relation and.s.aling *** find that some magnetic d.s.rders exist in the Cr4Te5 film system,which is related to Cr4Te5 critical behavior why its critical behavior is quite far from any conventional universality ***,we also determined that the Cr4Te5 film exhibits a quasi-2d long-range magnetic ***,the itinerant ferromagnets of Cr4Te5 films were confirmed by the Takahashi’s self-consistent renormalization theory of spin *** work provid.s.a new idea for understanding the mechanism of magnetic interactions in similar 2d layered films.

关键词： interaction film critical