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黄精对麦曲微生物群落结构及其功能基因的影响

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食品工业科技 2024年第3期45卷 56-64页

作者：张国泰贺思桥蒙倩倩芦润青唐菁雯向琴耿敬章田洪磊陕西理工大学生物科学与工程学院陕西省资源生物重点实验室陕南秦巴山区生物资源综合开发协同创新中心秦巴生物资源与生态环境重点实验室陕西汉中723000

目的:探究分别添加2.5%及5%质量分数的黄精对麦曲微生物群落结构及功能基因的影响,在此基础上为今后黄精麦曲的选择提供理论参考。方法:通过宏基因组学技术对黄精麦曲中的微生物组成及功能基因进行注释,使用主成分分析、堆叠柱状图及聚... 详细信息

目的:探究分别添加2.5%及5%质量分数的黄精对麦曲微生物群落结构及功能基因的影响,在此基础上为今后黄精麦曲的选择提供理论参考。方法:通过宏基因组学技术对黄精麦曲中的微生物组成及功能基因进行注释,使用主成分分析、堆叠柱状图及聚类热图等方法分析黄精对麦曲的微生物群落结构及功能基因的影响。结果:添加质量分数为2.5%的黄精制作的麦曲(HJ100)物种丰富度及均匀度均高于质量分数为5%(HJ200)及未添加黄精的麦曲(PTMQ);三者在属、种水平上均存在差异,其中HJ100的优势属为Aspergillus、Paecilomyces、Rasamsonia、Limosilactobacillus、Rhizopus、Klebsiella、Pantoea及Puccinia;HJ200与PTMQ的优势属均为Asper-gillus、Paecilomyces及Rasamsonia;HJ100优势种为Paecilomyces varioti、Rasamsonia emersonii、Limosilactoba-cillus pontis、Pantoea agglomerans、Rhizopus microsporus及Puccinia striiformis,HJ200与PTMQ的优势种均为Paecilomyces varioti和Rasamsonia emersonii;与HJ200及PTMQ相比,HJ100所注释出的功能基因的相对丰度展现出更高的均匀性,同时又具有高丰度的与碳水化合物代谢、蛋白质和氨基酸代谢的功能基因,该基因与黄酒的品质直接相关;酿造实验表明HJ100酿造的黄酒在总糖和多糖含量等指标上均优于HJ200及PTMQ,可保障黄酒的功能性与品质,且HJ100具有与PTMQ及HJ200相同的发酵能力。结论:添加2.5%质量分数的黄精,能够提高麦曲物种丰富度及均匀度和品质,可用于今后的黄酒酿造。

关键词：黄精麦曲宏基因组学技术功能注释微生物群落组成

Multidimensional Co_(3)O_(4)/NiO heterojunctions with richboundaries incorporated into reduced graphene oxide network for expanding the range of lithiophilic host

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InfoMat 2022年第8期4卷 93-104页

作者： qianqian meng Minrong Guan Yongxin Huang Li Li Feng Wu Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina Institute of Advanced Technology Beijing Institute of TechnologyJinanChina Collaborative Innovation Center of Electric Vehicles in Beijing BeijingChina

The commercial application of lithium(Li)metal anode is hindered by the growth of Li ***,we develop a multidimensional composite struc-ture composed of Co3O4/NiO heterojunction particles and reduced graphene oxide(rGO)nanosheets,that allows Li to nucleate and deposit selectively in one ***,two transition metal oxides(TMOs)without lit-hiophilicity are transformed into lithiophilic species due to the rich phase boundaries and high Li adsorption energies on interfaces,which can provide uniform active sites and reduce nucleation overpotential for Li ***,the rGO substrate with high electrical conductivity and large spe-cific surface area can form a conductive network between TMOs and alleviate volume expansion caused by Li *** from the synergistic effect of the heterojunctions and carbon substrate,the Co_(3)O_(4)/NiO-rGO regu-lates the local current density and enables the dendrite-free Li plating/stripping *** a current density of 1 mA cm^(-2),the Li metal anode with the Co_(3)O_(4)/NiO-rGO host exhibits remarkable electrochemical performance,consistently maintaining high Coulombic efficiency(>93.8%)over 1000 ***,the full cells matched with LiFePO_(4)cathode also display high rate capability of 130 mAh g^(-1)at 1 C and stable cycling life over 500 cycles.

关键词： 3D rGO network lithiophilic host lithium metal anode rich-boundaries heterojunctions

The main strategies for soil pollution apportionment:A review of the numerical methods

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Journal of Environmental Sciences 2024年第2期136卷 95-109页

作者： Bin Shi Jing meng TieyuWang qianqian Li Qifan Zhang Guijin Su Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Shantou UniversityShantou 515063China

Nowadays,a large number of compounds with different physical and chemical properties have been determined in *** behaviors and source identification of pollutants in soil are the foundation of soil pollution *** and quantitative analysis of potential pollution sources are the prerequisites for its prevention and *** efforts have made to develop methods for identifying the sources of soil *** efforts have involved the measurement of source and receptor parameters and the analysis of their relationships via numerical statistics *** have comprehensively reviewed the progress made in the development of source apportionment methodologies to date and present our *** numerical methods,such as spatial geostatistics analysis,receptor models,and machine learning methods are addressed in *** most cases,however,the effectiveness of any single approach for source apportionment remains *** multiple methods to address soil quality problems can reduce uncertainty about the sources of soil *** review also constructively highlights the key strategies of combining mathematical models with the assessment of chemical profiles to provide more accurate source *** review intends to provide a comprehensive summary of source apportionment methodologies to help promote further development.

关键词： Soil pollutants Source attribution Methodologies Chemical profiles Mathematical models

Double-side role of short chain fatty acids on host health via the gut-organ axes

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Animal Nutrition 2024年第3期18卷 322-339页

作者： Yanan Gao qianqian Yao Lu meng Jiaqi Wang Nan Zheng Key Laboratory of Quality&Safety Control for Milk and Dairy Products of Ministry of Agriculture and Rural Affairs Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China Milk and Milk Products Inspection Center of Ministry of Agriculture and Rural Affairs Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China State Key Laboratory of Animal Nutrition Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China Department of Food Science Faculty of Veterinary MedicineUniversity of LiègeLiège 4000Belgium

Short chain fatty acids(SCFA)exist in dietary foods and are produced by the fermentation of gut microbiota,and are considered an important element for regulating host *** blood circulation,SCFA produced in the gut and obtained from foods have an impact on the intestinal health as well as vital organs of the *** has been recognized that the gut is the“vital organ”in the *** the gut microbial metabolites,SCFA could create an“axis”connecting the gut and to other ***,the“gut-organ axes”have become a focus of research in recent years to analyze organism *** this review,we summarized the sources,absorption properties,and the function of SCFA in both gut and other peripheral tissues(brain,kidney,liver,lung,bone and cardiovascular)in the way of“gut-organ axes”.Short chain fatty acids exert both beneficial and pathological role in gut and other organs in various ways,in which the beneficial effects are more *** addition,the beneficial effects are reflected in both preventive and therapeutic *** importantly,the mechanisms behinds the gut and other tissues provided insight into the function of SCFA,assisting in the development of novel preventive and therapeutic strategies for maintaining the host health.

关键词： Short chain fatty acid Intestinal barrier Gut-organ axis Host health Beneficial effect Pathological effect

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浅析全聚焦相控阵超声检测的测试方法

物理测试 2024年第2期42卷 38-42页

作者：万海涛范兴钊胡冠群齐鲁孟倩倩山东瑞祥模具有限公司山东济宁272400 济宁市特种设备检验研究院山东济宁272400

全聚焦方法作为新兴的超声后处理成像技术具有成像分辨力高、算法灵活等优点。近年来,全聚焦技术在中国无损检测领域迅速发展,全聚焦超声检测设备性能取决于仪器软件全聚焦成像的算法。为更好地测试全聚焦超声检测性能,介绍了全聚焦相... 详细信息

全聚焦方法作为新兴的超声后处理成像技术具有成像分辨力高、算法灵活等优点。近年来,全聚焦技术在中国无损检测领域迅速发展,全聚焦超声检测设备性能取决于仪器软件全聚焦成像的算法。为更好地测试全聚焦超声检测性能,介绍了全聚焦相控阵超声检测的测试方法,并提出了一种适用于全聚焦技术的测试试块,为全聚焦技术的开发和应用提供参考。

关键词：相控阵全聚焦全矩阵

对GB/T 41655—2022《无损检测超声检测焊接、轧制和爆炸复合覆层检测技术》工艺方法的理解

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无损检测 2024年第1期46卷 57-60页

作者：魏玉龙黄隐谭云华马君孟倩倩山东瑞祥模具有限公司济宁272400 上海材料研究所有限公司上海200437 东方电气集团东方锅炉股份有限公司自贡643000

主要介绍了GB/T 41655—2022《无损检测超声检测焊接、轧制和爆炸复合覆层检测技术》中规定的超声检测工艺方法。重点介绍了超声检测系统中探头的选择,双晶聚焦直(斜)探头焦区的测定,检测用试块的设计及灵敏度的设定、检测范围等。

关键词：标准覆层检测试块

Catalytic degradation of chlorinated volatile organic compounds(CVOCs)over Ce-Mn-Ti composite oxide catalysts

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Journal of Environmental Sciences 2024年第4期138卷 326-338页

作者： Zhiwei Zhou qianqian Li Guijin Su Jiaxin Pang Bohua Sun Jing meng Bin Shi Henan Institute of Advanced Technology Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Environmental Nanotechnology and Health Effects State Key Laboratory of Environmental Chemistry and EcotoxicologyResearch Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Developing industrially moldable catalysts with harmonized redox performance and acidity is of great significance for the efficient disposal of chlorinated volatile organic compounds(CVOCs)in actual exhaust ***,commercial TiO_(2),typically used for molding catalysts,was chosen as the carrier to fabricate a series of Ce_(0.02)Mn_(0-0.24)TiO_(x) materials with different Mn doping ratios and employed for chlorobenzene(CB)*** introduction of Mn remarkedly facilitated the synergistic effect of each element via the electron transfer processes:Ce^(3+)+Mn^(4+/3+)■Ce^(4+)+Mn^(3+/2+)and Mn^(4+/3+)+Ti^(4+)■Mn^(3+/2+)+Ti^(3+).These synergistic interactions in Ce_(0.02)Mn_(0.04-0.24)TiO_(x),especially Ce_(0.02)Mn_(0.16)TiO_(x),significantly elevated the active oxygen species,oxygen vacancies and redox properties,endowing the superior catalytic oxidation of *** the Mn doping amount increased to 0.24,a separate Mn_(3)O_(4) phase appeared,which in turn might weaken the synergistic ***,the acidity of Ce_(0.02)Mn_(0.04-0.24)TiO_(x) was decreased with the Mn doping,regulating the balance of redox property and ***,Ce_(0.02)Mn_(0.16)TiO_(x) featured relatively abundant B-acid *** coordinating redox ability and moderate acidity promoted the deep oxidation of CB and RCOOH-intermediates,as well as the rapid desorption of Cl species,thus obtaining sustainable *** comparison,CeTiO_(x) owned the strongest acidity,however,its poor redox property was not sufficient for the timely oxidative decomposition of the easier adsorbed CB,resulting in its rapid *** finding provides a promising strategy for the construction of efficient commercial molding catalysts to decompose the industrial-scale CVOCs.

关键词： Chlorobenzene Ce_(0.02)Mn_(0-0.2)4tiox materials Redox ability Acidity Synergistic interaction

A scalable bio-inspired polydopamine-Cu ion interfacial layer for high-performance lithium metal anode

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Nano Research 2019年第12期12卷 2919-2924页

作者： qianqian meng Huimin Zhang Yue Liu Shaobo Huang Tianzhu Zhou Xiaofei Yang Biyan Wang Wenfeng Zhang Hai Ming Yu Xiang meng Li Gaoping Cao Yaqin Huang Li-zhen Fan Hao Zhang Yuepeng Guan Beijing Key Laboratory of Advanced Chemical Energy Storage Technologies and Material Research Institute of Chemical DefenseBeijing 100191China Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Chemical Resource Engineering The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer MaterialsBeijing University of Chemical TechnologyBeijing 100029China

The growth of Li dendrites and the instability of the solid electrolyte in terphase(SEI)layer during plating/stripping has hin dered the practical applicati on of high-energy-density batteries based on a lithium metal *** a stable interfacial layer is effective in preventing lithium corrosiion by the electrolyte and controlling the deposition of lithium ***,we present a robust polydopamine-Cu ion(PDA-Cu^2+)coati ng layer formed by the aggregation of nanoparticles and Cu ions,which can be obtained by a subtle immersion *** demonstrate that the PDA-Cu^2+ protective layer,with a unique structure comprising nanoparticles,can regulate and guide Li metal deposition,and together with Cu ions,forms a lubricating surface to facilitate uniform Li ion diffusion and induce stable SEI layer *** anodes with this PDA-Cu^2+layer modification ultimately achieve higher Coulombic efficiencies,which are consistently stable for over 650 cycles at 0.5 mA·cm^-2 without Li *** introduced PDA-Cu^2+ coating can adhere to any material of any shape;addition ally,the operation can be realized on a large scale because of its *** merits provide a promising approach for developing stable and safe lithium metal batteries.

关键词： polydopamine Cu ions interfacial layer lithium metal anode

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在役桥梁高强螺栓相控阵超声检测工艺探讨

物理测试 2024年第2期42卷 43-49页

作者：靳超万海涛魏玉龙孟倩倩吴昊段旭旭中国船级社实业有限公司北京100006 山东瑞祥模具有限公司山东济宁272400

高强螺栓广泛应用在钢结构桥梁中的连接上,在役使用过程中承受复杂的应力、温度变化等的作用,容易引起螺栓断裂或失效,其失效断裂是导致结构完整性破坏的重要原因,因而其安全性受到越来越多的重视。如何在不拆卸螺栓的前提下,检测出螺... 详细信息

高强螺栓广泛应用在钢结构桥梁中的连接上,在役使用过程中承受复杂的应力、温度变化等的作用,容易引起螺栓断裂或失效,其失效断裂是导致结构完整性破坏的重要原因,因而其安全性受到越来越多的重视。如何在不拆卸螺栓的前提下,检测出螺栓的疲劳裂纹始终是个难题。对在役桥梁钢塔高强螺栓进行了应力分析,确定了主要高应力水平位置,通过仿真模拟技术,分别研究了相控阵超声环阵探头线扫和相控阵超声线阵探头扇扫检测桥梁螺栓的关键技术,制定了在役桥梁高强螺栓检测工艺和方案,使用专用试块进行了灵敏度和螺栓全体积覆盖确认,并在实验室、现场进行了测试和验证。结合理论分析,实现对在役桥梁螺栓检测的全覆盖,解决了在役桥梁高强螺栓检测难题。

关键词：螺栓相控阵仿真