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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 525-535页

作者： Yi Liu jingnan qin Linlin Lu Jie Xu Xiaolei Su Xi’an Polytechnic University Xi’an 710048China

Porous carbon(PC)is a promising electromagnetic(EM)wave absorbing material thanks to its light weight,large specific surface area as well as good dissipating capacity.To further improve its microwave absorbing performance,silver coated porous carbon(Ag@PC)is synthesized by one-step hydro-thermal synthesis process making use of fir as a biomass formwork.Phase compositions,morphological structure,and microwave absorption capability of the Ag@PC has been explored.Research results show that the metallic Ag was successfully reduced and the particles are evenly distributed inward the pores of the carbon formwork,which accelerates graphitization process of the amorphous carbon.The Ag@PC composite without adding polyvinyl pyrrolidone(PVP)exhibits higher dielectric constant and better EM wave dissipating capability.This is because the larger particles of Ag give rise to higher electric conductivity.After combing with frequency selective surface(FSS),the EM wave absorbing performance is further improved and the frequency region below-10 d B is located in8.20-11.75 GHz,and the minimal reflection loss value is-22.5 dB.This work indicates that incorporating metallic Ag particles and FSS provides a valid way to strengthen EM wave absorbing capacity of PC material.

关键词： biomass carbon Ag@PC composite material frequency selective surface electromagnetic wave absorbing property

The underlying mechanism of variety–water–nitrogen–stubble damage interactions on yield formation in ratoon rice with low stubble height under mechanized harvesting

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Journal of Integrative Agriculture 2024年第3期23卷 806-823页

作者： jingnan Zou Ziqin Pang Zhou Li Chunlin Guo Hongmei Lin Zheng Li Hongfei Chen Jinwen Huang Ting Chen Hailong Xu Bin qin Puleng Letuma Weiwei Lin Wenxiong Lin College of Life Sciences Fujian Agriculture and Forestry University(FAFU)/Fujian Key Laboratory for Agroecological Processes and Safety MonitoringFuzhou 350002China College of Agriculture FAFU/Fujian Key Laboratory for Crop Physiology and Molecular EcologyFuzhou 350002China Institute of Oceanography College of Geography and OceanographyMinjiang UniversityFuzhou 350108China Crop Science Department The National University of LesothoRoma 00100Lesotho The Agricultural Extension Station of Pucheng County Nanping 353400China

Agronomic measures are the key to promote the sustainable development of ratoon rice by reducing the damage from mechanical crushing to the residual stubble of the main crop, thereby mitigating the impact on axillary bud sprouting and yield formation in ratoon rice. This study used widely recommended conventional rice Jiafuzhan and hybrid rice Yongyou 2640 as the test materials to conduct a four-factor block design field experiment in a greenhouse of the experimental farm of Fujian Agricultural and Forestry University, China from 2018 to 2019.The treatments included fertilization and no fertilization, alternate wetting and drying irrigation and continuous water flooding irrigation, and plots with and without artificial crushing damage on the rice stubble. At the same time, a 13C stable isotope in-situ detection technology was used to fertilize the pot experiment. The results showed significant interactions among varieties, water management, nitrogen application and stubble status.Relative to the long-term water flooding treatment, the treatment with sequential application of nitrogen fertilizer coupled with moderate field drought for root-vigor and tiller promotion before and after harvesting of the main crop, significantly improved the effective tillers from low position nodes. This in turn increased the effective panicles per plant and grains per panicle by reducing the influence of artificial crushing damage on rice stubble and achieving a high yield of the regenerated rice. Furthermore, the partitioning of 13C assimilates to the residual stubble and its axillary buds were significantly improved at the mature stage of the main crop, while the translocation rate to roots and rhizosphere soil was reduced at the later growth stage of ratooning season rice. This was triggered by the metabolism of hormones and polyamines at the stem base regulated by the interaction of water and fertilizer at this time. We therefore suggest that to achieve a high yield of ratoon rice with low stubble height under mechanized harvest

关键词： mechanized harvesting ratoon rice rice stubble yield attributes

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航空制造业税收政策研究演进可视化分析

国际税收 2024年第6期 72-81页

作者：韩霞臧静楠秦征北京航空航天大学公共管理学院中国民航大学安全科学与工程学院北京市财政局

航空制造业的发展水平直接关系国民经济发展与国防安全,是一国工业发展水平与国际竞争力的重要体现。税收政策作为有效的政策工具,在支持航空制造业发展中发挥着重要作用。本文利用可视化文献计量分析法,运用Citespace软件对中国知网和W... 详细信息

航空制造业的发展水平直接关系国民经济发展与国防安全,是一国工业发展水平与国际竞争力的重要体现。税收政策作为有效的政策工具,在支持航空制造业发展中发挥着重要作用。本文利用可视化文献计量分析法,运用Citespace软件对中国知网和Webof Science数据库中收录的国内外航空制造业税收政策研究相关文献进行计量分析和综合评价,把握国内外航空制造业税收政策研究发展趋势,挖掘航空制造业领域税收政策研究热点问题。研究表明,未来针对航空制造业税收政策的研究应重点关注税收优惠政策体系构建、航空制造与绿色技术融合发展,以及税收政策研究的跨部门合作,为航空制造业高水平发展提供更有效的税收政策支持和保障。

关键词：航空制造业税收政策可视化分析

不同解冻方法对3种速冻柑橘果肉品质特性的影响

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华中农业大学学报 2024年第2期43卷 154-163页

作者：王留言任婧楠秦雨晴范刚潘思轶李正伦胡兆兴何祥华中农业大学食品科学技术学院/环境食品学教育部重点实验室/果蔬加工与品质调控湖北省重点实验室武汉430070 秭归县屈姑食品有限公司秭归443600

为探究解冻方法对秭归脐橙、宜昌蜜桔、椪柑3个品种速冻柑橘果肉品质的影响,采用冰箱解冻、自然解冻、流水解冻、水浴解冻、超声波解冻和微波解冻6种方法对柑橘果肉进行处理,测定了速冻柑橘果肉的解冻时间、汁液流失率、常规品质指标、... 详细信息

为探究解冻方法对秭归脐橙、宜昌蜜桔、椪柑3个品种速冻柑橘果肉品质的影响,采用冰箱解冻、自然解冻、流水解冻、水浴解冻、超声波解冻和微波解冻6种方法对柑橘果肉进行处理,测定了速冻柑橘果肉的解冻时间、汁液流失率、常规品质指标、色泽、硬度、总酚含量、抗氧化活性的变化,并进行感官评价。结果表明,不同解冻处理对秭归脐橙、宜昌蜜桔和椪柑果肉品质的影响呈现显著差异(P<0.05)。秭归脐橙、宜昌蜜桔、椪柑3个品种微波解冻的时间最短,分别是0.82、0.89、0.81 min;汁液流失率最低,分别是0.25%、0.16%、0.15%;微波和超声波解冻的常规品质指标保存的较好;微波解冻的色泽影响最小,ΔE分别为8.48、7.52、4.71,且硬度损失率最小,分别降低了36.10%、52.03%和36.48%;总酚含量、抗氧化活性较高,感官方面与新鲜果肉样品最接近。以上结果表明,相比于其他5种解冻方式,微波解冻可以在1 min内完成果肉的解冻,有效减缓果肉颜色变化和硬度损失,较好地保留速冻柑橘果肉的食用品质和营养品质。

关键词：柑橘解冻方法速冻品质风味

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薹草属植物的生物学研究进展

中国草地学报 2024年第4期46卷 120-131页

作者：王竞红张靖楠覃崇源谭卓然罗语菲蔺吉祥王非东北林业大学园林学院黑龙江哈尔滨150040

薹草属(Carex)隶属于莎草科,是被子植物中最大的属之一。该属植物种类繁多,可见于林下、林缘、湿地、草甸等多种生境,分布较为广泛。该属内许多薹草种株型优美,抗性较强,在园林植物造景、盐碱地绿化和湿地植被修复等方面起着重要的作用... 详细信息

薹草属(Carex)隶属于莎草科,是被子植物中最大的属之一。该属植物种类繁多,可见于林下、林缘、湿地、草甸等多种生境,分布较为广泛。该属内许多薹草种株型优美,抗性较强,在园林植物造景、盐碱地绿化和湿地植被修复等方面起着重要的作用,因而近年来逐渐受到人们的关注。基于此,本文从薹草属植物的系统分类、抗逆性与栽培繁殖3个方面对其分类依据、新种发现情况、不同非生物因子的影响以及不同繁殖方式和养护特点进行了总结,并提出了研究展望。以期为薹草属植物应用于园林绿化与生态修复提供理论依据,也为薹草属植物后续在抗逆机理、种子萌发和快速繁殖等方面深入研究提供思路。

关键词：薹草属形态特征系统分类抗逆性繁殖

Topological superconductor candidates PdBi_(2)Te_(4) and PdBi_(2)Te_(5) from a generic ab initio strategy

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npj Computational Materials 2023年第1期9卷 400-406页

作者： Aiyun Luo Ying Li Yi qin jingnan Hu Xiaoxu Wang Jinyu Zou Biao Lian Gang Xu Wuhan National High Magnetic Field Center&School of Physics Huazhong University of Science and TechnologyWuhanChina Department of Physics Princeton UniversityPrincetonNJUSA Institute for Quantum Science and Engineering Huazhong University of Science and TechnologyWuhanChina Wuhan Institute of Quantum Technology WuhanChina

Superconducting topological metals(SCTMs)have recently emerged as a promising platform of topological superconductivity(TSC)and Majorana zero modes for quantum computation.Despite their importance in both fundamental research and applications,SCTMs are very rare in nature.Here,we propose a strategy to design SCTMs by intercalating the superconducting units into the topological insulators.A program that characterizes the superconducting BdG Chern number of 2D BdG Hamiltonian from ab initio calculations is also developed.Following this strategy,PdBi_(2)Te_(5) and PdBi_(2)Te_(4) are found to be experimentally synthesizable and ideal SCTMs.Chiral TSC could be realized in such SCTMs by incorporating topological surface states with Zeeman effect,which can be realized by an external magnetic field or in proximity to ferromagnetic insulator.Our strategy provides a new method for identifying the SCTMs and TSC candidates,and the program makes it possible to design and modulate the TSC candidates from ab initio calculations.

关键词： topological superconductor generic

脯氨酸-谷氨酸-亮氨酸富集蛋白1在甲状腺癌组织的表达及临床意义

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中华实验外科杂志 2024年第2期41卷 332-335页

作者：张一夫秦双王雷高延鑫刘靖楠郑鹏飞新乡医学院第一附属医院甲乳外科新乡453100

目的探讨脯氨酸-谷氨酸-亮氨酸富集蛋白1在甲状腺癌组织中的变化, 及其表达水平与肿瘤增殖和转移的关系。方法选取2018年8月至2023年8月新乡医学院第一附属医院手术治疗的44例甲状腺癌临床样本作为研究对象, 对应得癌旁组织作为对照, ... 详细信息

目的探讨脯氨酸-谷氨酸-亮氨酸富集蛋白1在甲状腺癌组织中的变化, 及其表达水平与肿瘤增殖和转移的关系。方法选取2018年8月至2023年8月新乡医学院第一附属医院手术治疗的44例甲状腺癌临床样本作为研究对象, 对应得癌旁组织作为对照, 采用蛋白质免疫印迹分析癌旁组织和甲状腺癌组织中脯氨酸-谷氨酸-亮氨酸富集蛋白1蛋白的表达水平。同时分析细胞增殖标志物(细胞增殖抗原)、迁移标志物(基质金属蛋白酶)和上皮-间充质转化标志物(N-钙黏蛋白和波形蛋白)表达水平。并分析脯氨酸-谷氨酸-亮氨酸富集蛋白1敲降对甲状腺癌细胞增殖、迁移和侵袭的影响。组间计量数据采用t检验。结果癌旁组织脯氨酸-谷氨酸-亮氨酸富集蛋白1表达水平(0.93±0.11)明显低于甲状腺癌组织(2.02±0.28), 差异有统计学意义(t=24.370, P<0.05)。癌旁组织细胞增殖抗原蛋白表达水平(1.01±0.29)明显低于甲状腺癌组织(2.48±0.12), 差异有统计学意义(t=19.070, P<0.05)。癌旁组织基质金属蛋白酶13表达水平(0.71±0.10)明显低于甲状腺癌组织(1.53±0.19), 差异有统计学意义(t=24.910, P<0.05)。甲状腺癌组织N-钙黏蛋白和波形蛋白表达水平(2.38±0.18、2.35±0.17)明显著高于癌旁组织(1.47±0.23、1.28±0.16), 差异有统计学意义(t=20.790、30.130, P<0.05)。脯氨酸-谷氨酸-亮氨酸富集蛋白1表达水平与细胞增殖抗原、基质金属蛋白酶13、N-钙黏蛋白和波形蛋白表达水平呈正相关(r=0.142、0.251、0.316、0.482, P<0.05)。对照组细胞吸光度值(2.04±0.14)显著高于PELP1 KD组细胞(1.51±0.10), 差异有统计学意义(t=20.790, P<0.05)。对照组迁移能力[(85.46±4.85)%]显著高于PELP1 KD组细胞[(68.84±8.69)%]差异有统计学意义(t=4.723, P<0.05)。对照组细胞侵袭数量[(142.75±14.56)个]显著高于PELP1 KD组细胞[(78.25±12.27)个], 差异有统计学意义(t=9.583, P<0.05)。结论甲状腺癌组织中脯氨酸-谷氨酸-亮氨酸富集蛋白1表达水平显著增加, 下调脯氨酸-谷氨酸-亮氨酸富集蛋白1可抑制甲状腺癌细胞的增殖、迁移和侵袭等过程。

关键词：脯氨酸-谷氨酸-亮氨酸富集蛋白1 甲状腺癌迁移侵袭增殖

Application of a novel inhibitor of human CD59 for the enhancement of complement-dependent cytolysis on cancer cells

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Cellular & Molecular Immunology 2011年第2期8卷 157-163页

作者： Tao You Weiguo Hu Xiaowen Ge jingnan Shen Xuebin qin Department of Musculoskeletal Oncology First Affiliated HospitalSun Yat-Sen UniversityGuangzhouChina Laboratory for Translational Research Harvard Medical SchoolCambridgeMAUSA Department of Medicine Brigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA

Many monoclonal antibodies(mAbs)have been extensively used in the clinic,such as rituximab to treat lymphoma.However,resistance and non-responsiveness to mAb treatment have been challenging for this line of therapy.Complement is one of the main mediators of antibody-based cancer therapy via the complement-dependent cytolysis(CDC)effect.CD59 plays a critical role in resistance to mAbs through the CDC effect.In this paper,we attempted to investigate whether the novel CD59 inhibitor,recombinant ILYd4,was effective in enhancing the rituximab-mediated CDC effect on rituximab-sensitive RL-7 lymphoma cells and rituximab-induced resistant RR51.2 cells.Meanwhile,the CDC effects,which were mediated by rituximab and anti-CD24 mAb,on the refractory multiple myeloma(MM)cell line ARH-77 and the solid tumor osteosarcoma cell line Saos-2,were respectively investigated.We found that rILYd4 rendered the refractory cells sensitive to the mAb-mediated CDC effect and that rILYd4 exhibited a synergistic effect with the mAb that resulted in tumor cells lysis.This effect on tumor cell lysis was apparent on both hematological tumors and solid tumors.Therefore,rILYd4 may serve as an adjuvant for mAb mediated-tumor immunotherapy.

关键词： CD59 complement lymphoma multiple myeloma rituximab

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丽江拉市海国际重要湿地生态修复方案探究

林业调查规划 2024年第1期49卷 34-39页

作者：刘茜沙剑斌郑进烜吴婧郑静楠蒋丽华秦燕杨忠兴云南省林业调查规划院云南昆明650051

拉市海国际重要湿地是我国重要的候鸟越冬栖息地之一,针对其整体环境整治问题,地方政府和管理部门做了大量工作,取得了较好成效,但还存在退化沼泽湿地急需修复、退养鱼塘急需生态修复、入湖河道急需治理等问题,基于此,提出退化沼泽湿地... 详细信息

拉市海国际重要湿地是我国重要的候鸟越冬栖息地之一,针对其整体环境整治问题,地方政府和管理部门做了大量工作,取得了较好成效,但还存在退化沼泽湿地急需修复、退养鱼塘急需生态修复、入湖河道急需治理等问题,基于此,提出退化沼泽湿地、退塘还湿、入湖河段生态修复以及破碎化湖滨带治理、外来物种防控等生态修复方案。通过湿地生态修复,湿地整体生态环境得到改善,候鸟栖息地、食源地得到修复,湿地植被和生物多样性明显增加,湿地景观得到优化,湿地生态服务功能有所提高。

关键词：生态修复退化沼泽湿地退塘还湿入湖河段破碎化湖滨带丽江拉市海国际重要湿地

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云南省极小种群野生植物拯救保护规划研究

林业调查规划 2024年第1期49卷 151-155页

作者：郑进烜蔡文婧郑静楠李柱存秦燕王勇余昌元杨华云南省林业调查规划院云南昆明650051 云南省林业和草原局云南昆明650224

以《云南省极小种群野生植物保护名录(2021版)》收录的101种云南省极小种群野生植物物种为规划研究对象,分析物种数量与分布现状,总结拯救保护成效与存在问题,从保护体系和科研管理支持体系两大领域进行规划研究并提出保障措施,旨在全... 详细信息

以《云南省极小种群野生植物保护名录(2021版)》收录的101种云南省极小种群野生植物物种为规划研究对象,分析物种数量与分布现状,总结拯救保护成效与存在问题,从保护体系和科研管理支持体系两大领域进行规划研究并提出保障措施,旨在全面提升云南省对极小种群野生植物认识水平和关注度,将极小种群拯救保护作为云南省生态文明建设的重要组成和亮点。

关键词：极小种群野生植物拯救保护云南省