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Acta Mechanica Sinica 2019年第6期35卷 1191-1209页

作者： A.Serra-Aguila J.M.Puigoriol-Forcada G.reyes J.Menacho Passive Safety Department Applus+IDIADA Spain Tarragona HQSanta OlivaL'AlbomarPO Box 2043710 TarragonaSpain IQS-School of Engineering Universitat Ramon LlullVia Augusta 39008017 BarcelonaSpain

Generalized Kelvin-Voigt and Maxwell models using Prony series are some of the most well-known models to characterize the behavior of *** simulation software for viscoelastic materials generally implement only some material ***,for the practice of the engineer,it is very useful to have formulas that establish the equivalence between different *** the existence of these relationships is a well-established fact,moving from one model to another involves a relatively long *** article presents a development of the relationships between generalized Kelvin-Voigt and Maxwell models using the aforementioned series and their respective relaxation and creep coefficients for one and two *** relationship between the singular points(maximums,minimums and inflexion points)is also included.

关键词： Viscoelasticity Dynamic mechanical analysis Mechanical vibrations

Effect of Milling Time on the Microstructure and Tensile Properties of Ultrafine Grained Ni–SiC Composites at Room Temperature

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Journal of Materials Science & Technology 2015年第9期31卷 923-929页

作者： Hefei Huang Chao Yang Massey de los reyes Yongfeng Zhou Long Yan Xingtai Zhou Shanghai Institute of Applied Physics Chinese Academy of Sciences Institute of Materials Engineering Australian Nuclear Science and Technology Organisation

Bulk metallic nickel-silicon carbide nano-particle （Ni-SiCNp） composites, with milling time ranged from 8 to 48 h, were prepared in a planetary ball mill and sintered using a spark plasma sintering （SPS） furnace. The microstructure of the Ni-SiCnp composites was characterized by transmission electron microscopy （TEM） and their mechanical properties were investigated by tensile measurements. The TEM results showed well-dispersed SiCNp particles, either within the matrix, between twins or along grain boundaries （GB）, as well as the presence of stacking faults and twin structures, characteristics of materials with low stacking fault energy. Dislocation lines were also observed to interact with the SiCNp which were plastically nondeformable. A synergistic relationship existed between Hall-Perch strength- ening and dispersion strengthening mechanisms, which was shown to greatly influence the mechanical properties of the Ni-SiCNp composites. Both the maximum yield and tensile strengths were found in the Ni-SiCNp composite with a milling time of 48 h, whereas the increased rate of strengths drastically decreased in material milled above 8 h due to the significant SiCNp agglomeration. The ball milling process resulted in the formation of nano-scale, ultra-fine grained （UFG） Ni-SiCNp composites when the milling time was extended for longer periods, greatly strengthening these materials. The sharp decrease in elongation percentages, however, should be comprehensively considered before irrevers- ible inelastic deformation.

关键词： Ni-SiCNp compositeMechanical alloyingSpark plasma sinteringTransmission electron microscopyTensile testUltra-fine grained (UFG)

Influence of energy removal rate on the quality of minced meat from undersized crawfish during frozen storage

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食物生产加工与营养(英文) 2020年第1期2卷 199-206页

作者： Franklin Bonilla Vondel reyes Alexander Chouljenko Bennett Dzandu Subramaniam Sathivel School of Nutrition and Food Sciences 220 Wilson LaboratoriesLouisiana State University Agricultural CenterBaton RougeLA 70803USA Department of Biological and Agricultural Engineering Louisiana State University Agricultural CenterBaton RougeLA 70803USA

Undersized crawfish have little economic value and are often *** crawfish minced meat(CMM)from undersized crawfish and using an appropriate freezing technique may enable an economically viable *** objective of this research was to evaluate the effect of the energy removal rate using two techniques,cryogenic freezing(CF)and air blast freezing(BF),on CMM’s quality during frozen *** was separated into two batches;one batch was cryogenically frozen with liquid nitrogen and the other batch was frozen with an air blast *** batches were frozen and stored at−18℃.They were analyzed for moisture content,color,pH,and lipid oxidation during 180 days of *** CMM yield was 64.67%of the total crawfish *** freezing achieved the highest freezing *** frozen CMM showed 22%less lipid oxidation than CMM frozen by air blast freezing at 180 days of *** study showed that CMM could be mechanically produced from undersized crawfish and freezing techniques with high energy removal rate could better maintain quality attributes for CMM during frozen storage.

关键词： Crawfish Minced meat Cryogenic freezing Air blast freezing

“I Felt Defeated. I Felt Helpless”: Social Determinants of Health Influencing the Cancer Survivorship of a Young Latina Mother

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Journal of Cancer Therapy 2022年第7期13卷 440-449页

作者： Adriena Hernandez Clara L. reyes Isela Garcia Rebecca L. Palacios Department of Health Promotion Sciences The University of Arizona Tucson AZ USA Department of Public Health Sciences New Mexico State University Las Cruces NM USA

Social determinants of health (SDOH) contribute to cancer disparities among young Latina women (<50 years) residing in the counties along the US-Mexico border. These SDOH are particularly burdensome to young Latina mothers diagnosed with cancer while they are raising school-age children. Conexiones, a culturally adapted program designed to improve mother and child adjustment to maternal cancer, was piloted with diagnosed Latina mothers residing in border counties in New Mexico and Texas. The purpose of this case analysis was to highlight the SDOH affecting a young Latina mother’s cancer survivorship in the U.S.-Mexico border region. The participant’s Conexiones education sessions were recorded, transcribed, translated to English, back translated to Spanish to establish accuracy, and inductively coded. The participant’s baseline survey indicated she was a young (<50 years), married, Spanish-speaking Latina mother diagnosed with breast cancer while raising a teenage daughter. Seventeen SDOH themes affecting the participant’s cancer experience were identified in the cancer-related emotional triggers she reported across five Conexiones sessions. These themes were organized using Yanez’s conceptual model of determinants of cancer outcomes in Hispanics (i.e., socioeconomic, healthcare, cultural context, and psychosocial). Findings provide direction for cultural adaptations of evidence-based programs.

关键词： Cancer Survivors Latinas Social Determinants of Health U.S.-Mexico Border

Wear Evaluation of Copper-Nickel-Aluminum Alloys under Extreme Conditions

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Journal of Minerals and Materials Characterization and Engineering 2023年第1期11卷 16-26页

作者： Rene Guardian Isai Rosales-Cadena Constancio Diaz-reyes Juan Antonio Ruiz-Ochoa Center for Research in Engineering and Applied Sciences Autonomous University of State of Morelos Cuernavaca Mexico Faculty of Sciences of the Enginery and Technology UABC Tijuana Mexico

Cu-Ni-Al alloys at different concentrations were obtained using a high frequency induction melting unit, keeping a balance in the nominal compositions. Light alloys are important to be used in industrial applications. Aluminum additions result in a positive hardness increment of the ternary alloys in comparison with the binary Cu-Ni alloys. Generalized wear mechanisms of the alloys with low aluminum content are basically type abrasive, while samples with 5 and 10 at.% Al present an oxidative-adhesive wear mechanism. Wear results have indicated that aluminum addition affects positively the wear resistance, mainly in samples with high aluminum content product of the creation during the test of different oxides corresponding to the elements present in the alloys.

关键词： Copper Nickel Alloys Hardness Mechanical Properties Heat Treatment

Heat-induced mortality and expression of heat shock proteins in Colorado potato beetles treated with imidacloprid

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Insect Science 2016年第4期23卷 548-554页

作者： Jie Chen Ai Kitazumi Jasper Alpuerto Andrei Alyokhin Benildo de los reyes School of Biology and Ecology University of Maine Orono ME 04469 USA Department of Entomology LouisianaState University Baton Rouge LA 70803 USA.

The Colorado potato beetle is an important pest of solanaceous plants in the Northern Hemisphere. Better understanding of its physiological responses to temperature stress and their interactions with still-prevalent chemical control has important implications for the management of this insect. We measured mortality and expression of the Hsp70 heat shock proteins in the Colorado potato beetle larvae exposed to sublethal concentration of the commonly used insecticide imidacloprid, and to supraoptimal temperatures. Both turned out to be significant stress factors, although induction of Hsp70 by imidacloprid observed in the present study was low compared to its induction by the heat. The two factors also interacted with each other. At an extreme temperature of 43 ~C, exposure to a sublethal dose of imidacloprid resulted in a significant rise in larval mortality, which was not observed at an optimal temperature of 25 ~C. Heat-stressed larvae also failed to respond to imidacloprid by producing more Hsp70. These findings suggest that when field rates of insecticides become insufficient for killing the exposed beetles under optimal temperature conditions due to the evolution of resistance in beetle populations, they may still reduce the probability of resistant beetles surviving the heat shock created by using propane flamers as a rescue treatment.

关键词： chemical stress climate change heat stress insecticide resistance integratedpest management Leptinotarsa decemlineata (Say)

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巴拿马椰子树薄壁生物启发结构的耐撞行为

巴拿马椰子树薄壁生物启发结构的耐撞行为

作者： reyes BATISTA ESTEPHANY DEL CARMEN（任巴缇）中南大学

学位级别：硕士

对材料特性的研究在研究和工业领域进行,作为获得材料的优势和寻找潜在应用的工具。因此,生物启发材料领域有助于结构的设计和材料的制造,目的是将已知的自然结构与特定的材料相结合。毫无疑问,对具有改进的机械性能的结构和材料的需求... 详细信息

对材料特性的研究在研究和工业领域进行,作为获得材料的优势和寻找潜在应用的工具。因此,生物启发材料领域有助于结构的设计和材料的制造,目的是将已知的自然结构与特定的材料相结合。毫无疑问,对具有改进的机械性能的结构和材料的需求正在上升,以及为提高抗震性和内部缓冲而提供定制性能的材料组合。本文介绍的吸能结构的一些应用,将在下文中说明。根据Lu和Yu书,吸能结构/材料的主要应用可以归纳为以下五个方面。提高车辆耐撞性的结构,用于道路安全的结构,用于保护工作中的事故的结构,用于个人保护的结构和用于商品包装的结构.有许多关于这种结构的科学研究,也有多个模型经过测试和优化,以实现拯救生命和减少损失的目的。这项研究旨在测试新的生物启发设计。大自然作为一个伟大的灵感来源,已经进化了数百万年。将对薄壁模型进行分析。这些可以在用于能量吸收应用的结构领域进行评估。在Lazarus等人的研究中,总结了生物材料的一般特征,如分层、复合、多孔和界面。另一方面,还介绍了在抗冲击生物材料中发现的具体结构:它们是分层、梯度、管状、夹层和缝合。这样的研究解释了在自然界中发现的许多管状型材料由于典型的塑性变形和裂纹偏转机制而增强了抗冲击性。通过这种方式,这项研究希望了解和理解在自然界发现的特定植物的主要结构特征,以模仿其结构并在三维建模软件的帮助下进行模拟,使我们能够分析和评估生物启发的薄壁结构的能量吸收。为了实现目的和目标,首先回顾了现有的科学研究,然后从巴拿马和美洲大陆的植被中获取灵感,以确定、解释、设计、验证和优化用于吸收能量的薄壁结构(直管)。这就是我们如何在以前的研究基础上着手验证FE方法,以便能够应用这种方法。然后,我们生成了受巴拿马椰树启发的薄壁圆管和方管的模型,在轴向和斜向载荷下进行数值试验,通过这些试验评估防撞性能,观察可用于能量吸收应用的替代结构的变形模式。本研究在第二章中介绍了一些基本知识,以及在薄壁结构设计中使用生物灵感的研究,特别是对圆形和方形结构。根据Lu&Yu的观点,无论应用何种结构设计来吸收能量,都有一些基本原则需要考虑,因为它们是一种指导原则。其中包括。不可逆的能量转换,受限和恒定的反作用力,长效冲击,稳定和可重复的变形模式,轻质和高比能量吸收能力以及简单和低成本的安装。有了生物启发设计的定义,下一步就是管子的制造、实验测试和数值分析。所查阅的科学文献研究中使用的实验方法包括不同的制造方法,如传统方法(车床加工、深拉工艺、成型、激光切割/雕刻、精密铸造工艺和线放电加工技术)、增材制造(使用3D打印技术)、层压,和其他新的制造技术。关于机械测试或试验的性能,我们可以提到蠕变和应力测试、准静态测试、低和高应变动态测试和冲击测试等方法。这些测试在生物启发设计领域的应用对于验证天然材料和由生物启发设计制造的材料的机械性能至关重要。科学文献中报道的数值分析方法包括使用有限元分析(FEA)工具,如Abaqus,ANSYS,Cosmos Works,Deform和LS-DYNA。关于数值模拟,已知的情况如下。当评估测试方法的类型以测量生物启发设计的能量吸收时,根据Lazarus等人,有不同的静态和动态方法。这些方法根据结构的可实现的变形率进行分组,即变形量对时间的变化。静态和准静态方法的应变速率小于100s-1,动态方法则高于这个范围。在决定方法时,区别在于要考虑到在动态试验中,载荷在短时间内快速施加,导致结构振动,必须考虑到结构的惯性力。而在静态和准静态试验中,载荷是缓慢施加的,它不依赖于时间,惯性力可以忽略不计。为了评估薄壁管的能量吸收特性(在轴向和斜向载荷下),在类似的研究中,很常见的是利用载荷-位移曲线评估这种结构在某些防撞标准下的性能,其中有以下几种:能量吸收(EA),比能量吸收(SEA),平均压溃力(MCF),峰值破碎力(PCF),压碎力效率(CFE).本研究的灵感来自于椰子树(Cocos nucifera)的茎。Fathi进行了一项研究,调查椰子树、油棕榈树和枣树木材的结构和机械/物理特性的关系。椰子树在整个巴拿马境内非常普遍;因此,这种植物被选为生物启发设计的对象。椰树茎的稳定性和椰树茎材料机械性能测试的良好结果,主要是由于维管束和实质细胞的组合,它们共同作为加固材料。在下一章中,首先解释了灵感的过程,圆柱形和方形的薄壁结构的设计,其几何形状,管子材料的机械性能,以及用于模拟的方法。然后介绍了有限元方法的验证结果。最后,介绍了每种设计的图表和模拟结果,绘制了不同的防撞标准,并比较了圆柱形和方形管在轴向破碎力和斜向冲击力下的设计效率。在一个名为***的免费在线工具上搜索植物管理结构力的生物策略,我发现树木和那些用于获得木材的树木都是实心圆柱体,因为它们有强大的维管束分布在茎中。这些维管束在外缘具有较高的强度和密度。椰

关键词：轴向挤压能量吸收生物启发设计耐撞性椰子树结构斜向冲击血管束

Electrochemical and spectroscopic study of interfacial interactions between chalcopyrite and typical flotation process reagents

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International Journal of Minerals,Metallurgy and Materials 2016年第2期23卷 127-136页

作者： Gustavo Urbano Isabel Lázaro Israel Rodríguez Juan Luis reyes Roxana Larios Roel Cruz Instituto de Metalurgia Universidad Autonotrla de San Luis PotosiAvSierra Leona 550Lomas 2a SeccionSan Luis PotosiS.L.P.78210Mexico Industrial Minera Mexico S.A.de C.V. San Luis PotosiS.L.P.Mexico Centro Universitario de Ciencias Exactas e Ingenierias Universidad de GuadalajaraGuadalajaraJaliscoMexico

Comparative voltammetry and differential double-layer capacitance studies were performed to evaluate interfacial interactions between cnalcopyrite（CuFeS2） and n-isopropyl xanthate（X） in the presence of ammonium bisulfite/39wt%SO2 and caustic starch at different pH *** spectroscopy,Fourier transform infrared（FTIR） spectroscopy,contact angle measurements,and microflotation tests were used to establish the type and extent of xanthate adsorption as well as the species involved under different mineral surface conditions in this *** results demonstrate that the species that favor a greater hydrophobicity of chalcopyrite are primarily CuX and S^0,whereas oxides and hydroxides of Cu and Fe as well as an excess of starch decrease the hydrophobicity.A conditioning of the mineral surface with ammonium bisulfite/39wt%SO2 at pH 6 promotes the activation of surface and enhances the xanthate ***,this effect is diminished at pH ≥ 8,when an excess of starch is added during the preconditioning step.

关键词： sulfide minerals chalcopyrite xanthates flotation interfacial reactions electrochemistry spectroscopy

Evaluation of three sets of advanced backcrosses of eggplant with wild relatives from different gene pools under low N fertilization conditions

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Horticulture Research 2023年第8期10卷 295-309页

作者： Gloria Villanueva Mariola Plazas Pietro Gramazio reyes D.Moya Jaime Prohens Santiago Vilanova Instituto de Conservación y Mejora de la Agrodiversidad Valenciana Universitat Politècnica de ValènciaCamino de Vera 1446022ValenciaSpain

The development of new cultivars with improved nitrogen use efficiency(NUE)is key for implementing sustainable agriculture *** wild relatives(CWRs)provide valuable genetic resources for breeding programs aimed at achieving this *** this study,three eggplant(Solanum melongena)accessions together with their advanced backcrosses(ABs;BC3 to BC5 generations)were evaluated for 22 morpho-agronomic,physiological,and NUE traits under low nitrogen(LN)fertilization *** ABs were developed with introgressions from the wild relatives Solanum insanum,Solanum dasyphyllum,and Solanum *** AB population comprised a total of 25,59,and 59 genotypes,respectively,with overall donor wild relative genome coverage percentages of 58.8%,46.3%,and 99.2%.The three *** recurrent parents were also evaluated under control(normal)N *** of N fertilization in the parents resulted in decreased chlorophyll content-related traits,aerial biomass,stem diameter,and yield and increased NUE,nitrogen uptake efficiency(NUpE),and nitrogen utilization efficiency(NUtE).However,the decrease in yield was moderate,ranging between 62.6%and 72.6%.A high phenotypic variation was observed within each of the three sets of ABs under LN conditions,with some individuals displaying improved transgressive characteristics over the recurrent *** the single primer enrichment technology 5 k probes platform for high-throughput genotyping,we observed a variable but high degree of recurrent parent genome recovery in the ABs attributable to the lines recombination,allowing the successful identification of 16 quantitative trait loci(QTL).Different allelic effects were observed for the introgressed QTL *** candidate genes were identified in the QTL regions associated with plant growth,yield,fruit size,and NUE-related *** results show that eggplant materials with introgressions from CWRs can result in a dramatic impact in eggplant breedi

关键词： breeding cultivar fertilization

Characterization of Cd1-xZnxTe（0≤x≤1） Nanolayers Grown by Atomic Layer Deposition on GaSb and GaAs（001） Oriented Substrates

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Journal of Electronic Science and Technology 2019年第2期17卷 97-108页

作者： Joel Díaz-reyes Roberto Saúl Castillo-Ojeda José Eladio Flores-Mena Center for Research in Applied Biotechnology Instituto Politécnico Nacional Tepetitla 90700 Mexico Universidad Politécnica de Pachuca Pachuca 43830 Mexico Faculty of Sciences of the Electronics Autonomous University of Puebla Puebla 72570 Mexico

ZnTe, CdTe, and the ternary alloy CdZnTe are important semiconductor materials used widely for the detection of an important range of electromagnetic radiation as gamma ray and X-ray. Although, recently these materials have acquired renewed importance due to the new explored nanolayer properties of modern devices. In addition, as shown in this work they can be grown using uncomplicated synthesis techniques based on the deposition in vapour phase of the elemental precursors. This work presents the results obtained from the deposition of nanolayers of these materials using the precursor vapour on GaAs and GaSb (001) substrates. This growth technique, extensively known as atomic layer deposition (ALD), allows the layers growth with nanometric dimension. The main results presented in this work are the used growth parameters and the results of the structural characterization of the layers by the means of Raman spectroscopy measurements. Raman scattering shows the peak corresponding to longitudinal optical (LO)-ZnTe, which is weak and slightly redshift in comparison with that reported for the ZnTe bulk at 210 cm^-1. For the case of the CdTe nanolayer, Raman spectra presented the LO-CdTe peak, which is indicative of the successful growth of the layer. Its weak and slightly redshift in comparison with that reported for the CdTe bulk can be related with the nanometric characteristic of this layer. The performed high-resolution X-ray diffraction (HR-XRD) measurement allows to study some important characteristics such as the crystallinity of the grown layer. In addition, the HR-XRD measurement suggests that the crystalline quality has dependence on the growth temperature.

关键词： Ⅲ-Ⅴ substrates atomic layer deposition(ALD) defect generation mechanism ternary alloy Cd1-xZnxTe Zn and Cd mixture