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Enhanced electromagnetic wave absorption via optical fiber-like PMMA@Ti_(3)C_(2)T_(x)@SiO_(2) composites with improved impedance matching

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Nano Research 2024年第3期17卷 1676-1686页

作者： huanhuan niu Xuewen Jiang Wei Li Zhiyu Min Budi Riza Putra Wulan Tri Wahyuni Hailong Wang Rui Zhang Bingbing Fan School of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Department of Materials and Earth Sciences Technical University of DarmstadtDarmstadt 64287Germany School of Material Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Research Center for Metallurgy National Research and Innovation Agency(BRIN)PUSPIPTEK Gd.470South TangerangBanten 15315Indonesia Analytical Chemistry Division Department of ChemistryFaculty of Mathematics and Natural SciencesIPB UniversityWest Java 16680Indonesia

Ti_(3)C_(2)T_(x) nanosheets have attracted significant attention for their potential in electromagnetic wave absorption(EWA).However,their inherent self-stacking and exorbitant electrical conductivity inevitably lead to serious impedance mismatch,restricting their EWA ***,the optimization of impedance matching becomes *** this work,we developed polymethyl methacrylate(PMMA)@Ti_(3)C_(2)T_(x)@SiO_(2) composites with a sandwich-like core–shell structure by coating SiO_(2) on PMMA@Ti_(3)C_(2)T_(x).The results demonstrate that the superiority of the SiO_(2) layer in combination with PMMA@Ti_(3)C_(2)T_(x),outperforming other relative graded distribution structures and meeting the requirements of EWA *** resulting PMMA@Ti_(3)C_(2)T_(x)@SiO_(2) composites achieved a minimum reflection loss of-58.08 dB with a thickness of 1.9 mm,and an effective absorption bandwidth of 2.88 *** analysis revealed that the structural design of SiO_(2) layer not only optimized impedance matching,but also synergistically enhanced multiple loss mechanisms such as interfacial polarization and dipolar ***,this work provides valuable insights for the future preparation of high-performance electromagnetic wave absorbing Ti_(3)C_(2)T_(x)-based composites.

关键词： polymethyl methacrylate(PMMA)@Ti_(3)C_(2)T_(x)@SiO_(2)composites impedance match SiO_(2)layer optical fiber-like structure interfacial polarization and dipolar polarization

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电子商务环境下饲料企业财务风险管理与控制

中国饲料 2024年第8期 96-99页

作者：陈婷玉潘秋瑜牛欢欢河北女子职业技术学院河北石家庄050000 广西工商职业技术学院广西南宁530003 邯郸科技职业学院河北邯郸056000

电子商务转变了饲料企业财务管理的模式,增大了财务管理的难度,拓展了财务管理的内容,同时这也导致饲料企业财务风险管理难度增加。在电子商务环境下,饲料企业需要通过搭建业财一体化财务风险管理信息系统,运用大数据技术加强对饲料电... 详细信息

电子商务转变了饲料企业财务管理的模式,增大了财务管理的难度,拓展了财务管理的内容,同时这也导致饲料企业财务风险管理难度增加。在电子商务环境下,饲料企业需要通过搭建业财一体化财务风险管理信息系统,运用大数据技术加强对饲料电商业务的财务风险分析,制定电商业务的财务风险预警机制,加强对财务管理者的技能培训,通过这些方法和措施来提升饲料企业财务风险管理。

关键词：电子商务饲料企业财务管理风险控制

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香椿芽贮藏保鲜技术研究

中国果菜 2024年第9期44卷 1-6,18页

作者：程清海李璐潘从容牛欢欢邯郸科技职业学院河北邯郸056046 邯郸市钢苑中学河北邯郸056002

香椿芽风味独特、营养丰富,但采食期短,容易变味变质。为延长香椿芽贮藏期,在漂烫速冻冷藏法的基础上建立了一种简单、快捷、营养风味保持好的保鲜方法,以感官评分为评价指标,运用理化分析法进行优化,并与4种常用的香椿芽贮藏保鲜方法(... 详细信息

香椿芽风味独特、营养丰富,但采食期短,容易变味变质。为延长香椿芽贮藏期,在漂烫速冻冷藏法的基础上建立了一种简单、快捷、营养风味保持好的保鲜方法,以感官评分为评价指标,运用理化分析法进行优化,并与4种常用的香椿芽贮藏保鲜方法(袋装贮藏法、保鲜剂冷藏法、食盐腌制贮藏法、漂烫速冻冷藏法)进行比较。结果表明,香椿芽在新鲜采摘后的6 h内,经45~60 s的沸水焯煮漂烫,用10℃的水冷却,沥干水分,装入保鲜袋抽成真空,并于-18℃保存,其特色风味能得到有效保持,营养成分无显著减损,食品安全指标符合GB 2762—2022要求。与上述4种常用的香椿芽贮藏保鲜方法相比,该方法能更好地保留营养物质保留好,亚硝酸盐含量低,更适合香椿芽保鲜。

关键词：香椿芽特色风味贮藏保鲜冷冻保存

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Gynoecy instability in cucumber(Cucumis sativus L.)is due to unequal crossover at the copy number variation-dependent Femaleness(F)locus

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Horticulture Research 2020年第1期7卷 2342-2356页

作者： Zheng Li Yonghua Han huanhuan niu Yuhui Wang Biao Jiang Yiqun Weng Horticulture Department University of WisconsinMadisonWI 53706USA College of Horticulture Northwest A&F UniversityYanglingShaanxi 712100China Institute of Integrative Plant Biology School of Life SciencesJiangsu Normal UniversityXuzhou 221116China Vegetable Research Institute Guangdong Academy of Agricultural ScienceGuangzhouGuangdong 510640China USDA-ARS Vegetable Crops Research UnitMadisonWI 53706USA

Cucumber,Cucumis sativus is an important vegetable crop,and gynoecy has played a critical role in yield increase of hybrid cucumber *** has a unique genetic system for gynoecious sex expression,which is determined by the copy number variation(CNV)-based,dominant,and dosage-dependent femaleness(F)***,this gynoecy expression system seems unstable since monecious plants could often be found in Fdependent gynoecious cucumber *** hypothesized that gynoecy instability(gynoecy loss)may be due to unequal crossing over(UCO)during meiosis among repeat units of the *** this study,using high throughput genome resequencing,fiber-FISH and genomic qPCR analyses,we first confirmed and refined the structure of the F locus,which was a CNV of a 30.2-kb tandem *** plants contained three genes:CsACS1,CsACS1G,and CsMYB,of which CsACS1G is a duplication of CsACS1 but with a recombinant distal promoter that may contribute to gynoecy sex *** two large populations from self-pollinated gynoecious inbred lines,‘gynoecy loss’mutants were identified with similar mutation rates(~0.12%).We show that these monecious mutants have lost *** addition,we identified gynoecious lines in natural populations that carry two copies of *** proposed a model to explain gynoecy instability in F-dependent cucumbers,which is caused by UCO among CSACS1/G units during *** findings present a convincing case that the phenotypic variation of an economically important trait is associated with the dynamic changes of copy numbers at the F *** work also has important implications in cucumber breeding.

关键词： fir number dosage

Construction of hydrangea-like core-shell SiO_(2)@Ti_(3)C_(2)T_(x)@CoNi microspheres for tunable electromagnetic wave absorbers

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Journal of Advanced Ceramics 2023年第4期12卷 711-723页

作者： huanhuan niu Xuewen Jiang Yongde Xia Hailong Wang Rui Zhang Hongxia Li Bingbing Fan Yanchun Zhoua School of Material Science&Engineering Zhengzhou UniversityZhengzhou 450001China Department of Engineering University of ExeterExeter EX44SBUK School of Materials Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Sinostel Luoyang Institute of Refractories Research Co. Ltd.Luoyang 471039China

Ti_(3)C_(2)T_(x)MXene shows great potential in the application as microwave absorbers due to its high attenuation ***,excessively high permittivity and self-stacking are the main obstacles that constrain its wide range of *** tackle these problems,herein,the microspheres of SiO_(2)@Ti_(3)C_(2)T_(x)@CoNi with the hydrangea-like core-shell structure were designed and prepared by a combinatorial electrostatic assembly and hydrothermal reaction *** microspheres are constructed by an outside layer of CoNi nanosheets and intermediate Ti_(3)C_(2)T_(x)MXene nanosheets wrapping on the core of modified SiO_(2),engendering both homogenous and heterogeneous *** trilayer SiO_(2)@Ti_(3)C_(2)T_(x)@CoNi microspheres are“magnetic microsize supercapacitors”that can not only induce dielectric loss and magnetic loss but also provide multilayer interfaces to enhance the interfacial *** optimized impedance matching and core-shell structure could boost the reflection loss(RL)by electromagnetic *** synthesized SiO_(2)@Ti_(3)C_(2)T_(x)@CoNi microspheres demonstrate outstanding microwave absorption(MA)performance benefited from these *** obtained RL value was-63.95 dB at an ultra-thin thickness of 1.2 mm,corresponding to an effective absorption bandwidth(EAB)of 4.56 *** work demonstrates that the trilayer core-shell structure designing strategy is highly efficient for tuning the MA performance of MXene-based microspheres.

关键词： SiO_(2)@Ti_(3)C_(2)T_(x)@CoNi hydrangea-like core-shell structure spherical capacitor high-performance microwave absorption(MA) interfacial polarization impedance match

Development of branchless watermelon near isogenic lines by marker assisted selection

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Horticultural Plant Journal 2022年第5期8卷 627-636页

作者： Junling Dou Yinping Wang Huihui Yang huanhuan niu Dongming Liu Sen Yang Huayu Zhu Shouru Sun Luming Yang Henan Key Laboratory of Fruit and Cucurbit Biology College of HorticultureHenan Agricultural UniversityZhengzhou450002China

Pruning is time-consuming and laborious in watermelon cultivation,which can not meet the needs for simplified cultivation in the *** development of branchless lines will provide important germplasms for breeding watermelon varieties and is an important method for genetic *** this study,the watermelon accession,Wu Cha Zao(WCZ)is a branchless inbred line that carries the branchless gene Clbl,which was used as the donor parent to develop branchless near isogenic lines(NILs).To construct the NILs of Clbl,WCZ crossed with the normal branching watermelon inbred line WT20 which was used as the recurrent *** co-segregating markers dCAPS10 and Indel1 with Clbl were used for foreground selection,and a total of 108 SSR markers was selected with good polymorphism between two parental lines for background selection which had relatively uniform distribution across 11 *** these markers to select individuals from the BC_(1)F_(1),BC_(2)F_(1),and BC_(2)F_(2) generations,three NILs with a proportion of recurrent parent genome(PRPG)>99%were finally *** lateral branch and plant height phenotypes did not significantly differ between the NILs and WCZ,indicating that the NILs of Clbl under the genetic background of WT20 has been successfully *** results provide ideal materials for further in-depth analysis of the genetic mechanisms of lateral branch development and ideal plant architecture breeding in watermelon.

关键词： Watermelon Branchless Clbl Near isogenic lines Marker assisted selection

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Horticulture Research 2020年第1期7卷 434-448页

作者： Hu Wang huanhuan niu Chuang Li Guoyan Shen Xiaofeng Liu Yiqun Weng Tao Wu Zheng Li State Key Laboratory of Crop Stress Biology in Arid Areas College of HorticultureNorthwest A&F UniversityYanglingShaanxi 712100China Department of Vegetable Sciences Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable CropsChina Agricultural UniversityBeijing 100193China USDA-ARS Vegetable Crops Research UnitHorticulture DepartmentUniversity of WisconsinMadisonWI 53706USA College of Horticulture and Landscape Architecture Hunan Agricultural UniversityChangshaHunan 410128China

In plants,WUSCHEL-related homeobox1(WOX1)homologs promote lamina mediolateral ***,the downstream components linking WOX1 and lamina development remain *** this study,we revealed the roles of WOX1 in palmate leaf expansion in cucumber(Cucumis sativus).A cucumber mango fruit(mf)mutant,resulting from truncation of a WOX1-type protein(CsWOX1),displayed abnormal lamina growth and defects in the development of secondary and smaller ***1 was expressed in the middle mesophyll and leaf margins and rescued defects of the Arabidopsis wox1 prs double *** analysis revealed that genes involved in auxin polar transport and auxin response were highly associated with leaf *** of the cucumber mf rl(round leaf)double mutant revealed that CsWOX1 functioned in vein development via PINOID(CsPID1)-controlled auxin *** of CsWOX1 in cucumber(CsWOX1-OE)affected vein patterning and produced‘butterfly-shaped’***1 physically interacted with CsTCP4a,which may account for the abnormal lamina development in the mf mutant line and the smaller leaves in the CsWOX1-OE *** findings demonstrated that CsWOX1 regulates cucumber leaf vein development by modulating auxin polar transport;moreover,CsWOX1 regulates leaf size by controlling CIN-TCP genes.

关键词： size WUS shaped

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西瓜遗传转化体系的优化

中国瓜菜 2024年第3期37卷 9-19页

作者：李鹏飞陈子豪张敏娟豆峻岭杨森刘东明牛欢欢杨路明河南农业大学园艺学院郑州450046

以8种基因型西瓜为试验材料,通过统计不同基因型材料的发芽率、不定芽诱导率,筛选出再生能力较强的基因型,并以其为材料对种子播种后培养时间、外植体造伤方式、菌液浓度、共培养时间及侵染方式等进行优化筛选,旨在建立高效的西瓜遗传... 详细信息

以8种基因型西瓜为试验材料,通过统计不同基因型材料的发芽率、不定芽诱导率,筛选出再生能力较强的基因型,并以其为材料对种子播种后培养时间、外植体造伤方式、菌液浓度、共培养时间及侵染方式等进行优化筛选,旨在建立高效的西瓜遗传转化体系。结果表明,在播种2 d时,YL、CYY298、CYY171及CYY137之间的种子发芽率差异不显著且均显著高于其他材料,但在不同浓度GA_(3)诱导下,YL外植体的不定芽诱导率均最高;以YL材料为基础进行体系优化,发现播种2 d后的种子状态最适于侵染;刀片划伤后的外植体荧光亮度最强,荧光率最高达74.9%;菌液浓度OD600=0.8,共培养时间为3 d时,外植体分化状态最佳且荧光率最高为70.3%;真空负压方式可以显著提高侵染效率,外植体荧光率可达71.8%,愈伤组织诱导率高达60.2%;分化培养基中添加0.5 mg·L^(-1)的GA_(3)后不定芽的诱导率最高为74%;生根培养基中添加0.5 mg·L^(-1)的IBA时生根率最高,平均生根数最多。

关键词：西瓜遗传转化转化效率体系优化

89份西瓜种质资源表型鉴定和遗传多样性分析

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中国瓜菜 2024年第4期37卷 14-26页

作者：康旗帅闫梦苑袁伟格豆峻岭杨森刘东明牛欢欢闫文凯朱华玉杨路明河南农业大学园艺学院郑州450002

以89份西瓜种质资源为材料,利用形态学标记和西瓜SNP高效液相芯片,结合多样性分析、群体结构分析、聚类分析和主成分分析等方法,对其遗传多样性进行系统全面的研究。结果表明,49个表型性状Shannon多样性指数的变化范围是0.42~3.00,平均... 详细信息

以89份西瓜种质资源为材料,利用形态学标记和西瓜SNP高效液相芯片,结合多样性分析、群体结构分析、聚类分析和主成分分析等方法,对其遗传多样性进行系统全面的研究。结果表明,49个表型性状Shannon多样性指数的变化范围是0.42~3.00,平均值为2.32,其中描述型性状平均值为1.28,数量性状为2.82;33个数量性状的变异系数变化范围为5.45%~72.59%,平均值为28.00%,变异系数最大的是果实质量(72.59%),其次是第一雌花节位(64.21%)和第一雄花节位(58.59%)。利用液相芯片对这89份种质资源进行DNA测序,得到60.2 Gb的原始数据和401.3 Mb的raw_reads数据,质控后得到53.1 Gb的数据和399.7 Mb的clean_reads数据,比对到参考基因组上的reads数为332.4Mb,平均比对率为82.97%,平均测序深度为923.7X。群体结构分析显示89份材料的最优群体结构数为2,主成分分析和系统发育树结果显示,在89份材料中,药西瓜与饲用西瓜亲缘关系最近,栽培西瓜与饲用西瓜亲缘关系次之。长期的选择驯化使西瓜遗传背景变得十分狭窄,通过发掘野生西瓜资源,进而拓宽西瓜遗传背景,对西瓜抗病、抗逆以及株型改良等分子育种具有重要意义。

关键词：西瓜种质资源群体结构分析