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Supplementation of vitamin e or a botanical extract as antioxidants to improve growth performance and health of growing pigs housed under thermoneutral or heat-stressed conditions

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Journal of Animal Science and Biotechnology 2024年第3期15卷 1101-1118页

作者： Ysenia V.Silva‑Guillen Consuelo Arellano Jeffrey Wiegert R.Dean Boyd Gabriela e.martinez eric van Heugten Department of Animal Science North Carolina State UniversityRaleighNC 27695USA Department of Statistics North Carolina State UniversityRaleighNC 27695USA Department of Animal Science Texas A&M UniversityCollege StationTX 77843USA Animal Nutrition Research LLCAlvatonKY 42122USA.

Background Heat stress has severe negative consequences on performance and health of pigs,leading to significant economic *** objective of this study was to investigate the effects of supplemental vitamin e and a botanical extract in feed or drinking water on growth performance,intestinal health,and oxidative and immune status in grow-ing pigs housed under heat stress *** Duplicate experiments were conducted,each using 64 crossbred pigs with an initial body weight of 50.7±3.8 and 43.9±3.6 kg and age of 13-week and 12-week,***(n=128)were housed individually and assigned within weight blocks and sex to a 2×4 factorial arrangement consisting of 2 environments(thermo-neutral(21.2℃)or heat-stressed(30.9℃))and 4 supplementation treatments(control diet;control+100 IU/L of D-α-tocopherol in water;control+200 IU/kg of DL-α-tocopheryl-acetate in feed;or control+400 mg/kg of a botanical extract in feed).Results Heat stress for 28 d reduced(P≤0.001)final body weight,average daily gain,and average daily feed intake(-7.4 kg,-26.7%,and-25.4%,respectively)but no effects of supplementation were detected(P>0.05).Serum vitamin e increased(Pe supplementation in water and in feed(1.64 vs.3.59 and 1.64 vs.3.24),but not for the botanical extract(1.64 vs.1.67 mg/kg)and was greater when supplemented in water ***(P=0.002).Liver vitamin e increased(Pe supplementations in water(3.9 vs.31.8)and feed(3.9 vs.18.0),but not with the botanical extract(3.9 vs.4.9 mg/kg).Serum malondialdehyde was reduced with heat stress on d 2,but increased on d 28(interaction,Peater(Pementation compared to *** proliferation was reduced(P=0.037)in the jejunum under heat stress,but increased in the ileum when vitamin e was supplemented in feed and water under heat stress(interaction,P=0.04).Tumor necrosis factor-αin jejunum and ileum mucosa decreased by heat stress(Pe

关键词： Botanical extract Growing pigs Heat stress Immune status Oxidative status Tocopherol Water

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Supplementation of vitamin e or a botanical extract as antioxidants to improve growth performance and health of growing pigs housed under thermoneutral or heat‑stressed conditions.

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畜牧与生物技术杂志(英文版) 2024年第3期 1101页

作者： Ysenia V.Silva-Guillen Consuelo Arellano Jeffrey Wiegert R.Dean Boyd Gabriela e.martínez eric van Heugten

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Parametrization of the Teichmüller Space of Bordered Surface NeC Groups

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Acta Mathematica Sinica,english Series 2008年第6期24卷 1039-1056页

作者： B.eSTRADA e.martínez Departamento de Matemdticas Fundamentales UNEDPaseo Senda del Rey 928040 MadridSpain

A non-euclidean crystallographic group F （NeC group, for short） is a discrete subgroup of isometries of the hyperbolic plane H, with compact quotient space H/Г. These groups uniformize Klein surfaces, surfaces endowed with dianalytic structure. These surfaces can be seen as a generalization of Riemann surfaces. Fundamental polygons play an important role in the study of parametrizations of the Teichmuller space of NeC groups. In this work we construct a class of right-angled polygons which are fundamental regions of bordered surface NeC groups. The free parameters used in the construction of the polygons give a parametrization of the Teichmuller space. From the parameters we obtain explicit matrices of the generators of the groups. Finally, we give examples to exhibit how different relations between the parameters reflect the existence of automorphisms on the quotient surfaces.

关键词： non-euclidean crystallographic groups hyperbolic polygons Klein surfaces automorphisms of surfaces Teichmfiller space

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Non-collinear magnetism in the Fe3 microcluster: free-standing vs supported environments

Non-collinear magnetism in the Fe3 microcluster: free-standi...

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Ⅻ International Symposium on Small Particles and Inorganic Clusters

作者： e.martínez R.Robles A.Vega R.C.Longo L.J.Gallego Departamento de Física Teórica AtómicaNucleary pticaUniversidad de ValladolidE-47011 ValladolidSpain Department of Physics Uppsala UniversityBox 530751 21UppsalaSweden Departamento de Física Teórica AtómicaNucleary ptica Universidad de ValladolidE-47011 ValladolidSpain Departamento de Física de la Materia Condensada Facultad de FísicaUniversidad de Santiago de CompostelaSpain Departamento de Física de la Materia Condensada Facultad de FísicaUniversidad de Santiago de CompostelaSpain

＜正＞ The possibility of a non-collinear magnetic configuration of the Fe3 microcluster supported on the Ni （001） surface has been investigated. The morphology of the supported cluster has been calculated by means of the modified embedded atom model with quenched molecular dynamics simulations, and the electronic structure for the most stable geometrical configuration has been studied using a self-consistent non-collinear spd tight-binding method parametrized to ab-

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CO oxidation under lean and stoichiometric conditions over ceriazirconia with very low metal contents(Cu,Co,Ag and Pt)

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Journal of Rare earths 2024年第9期42卷 1669-1681,I0002页

作者： J.C.martínez-Munuera M.P.Yeste A.García-García MCMA Group Department of Inorganic Chemistry and Institute of MaterialsUniversity of AlicanteCarretera de San Vicente del Raspeig s/n03690San Vicente del RaspeigAlicanteSpain Solid Chemistry and Catalysis Group Department of Materials ScienceMetallurgic Engineering and Inorganic ChemistryInstitute of Electronic Microscopy and Materials ResearchUniversity of CádizAp.40E-11510Puerto RealCádizSpain

In this work,several ceria-zirconia based catalysts with very lo w(and equimolar) metal contents were prepared,characterised and tested for the CO oxidatio n reaction(under lean and stoichiometric conditions),trying to emulate those conditions found in a diesel oxidation catalyst(DOC) system from a diesel engine and those encountered under gasoline exhaust(λ=1).The metals chosen are Cu,Co,Ag and Pt(as a reliable benchmark).The results reveal enormous differences among reducibility and catalytic activity despite quite similar structural and textural properties of the catalysts,showing differences among dispersion(Ag-catalyst seems to present a low level of dispersion).This catalyst seems to be characterised,as well,by a strong electronic interaction between Ce and Ag centres which is suggested to yield an improved reducibility under H_(2)-TPR ***,the order in catalytic activity(Cu>Ag>Co≈Pt>>support) seems not to follow the order found in reducibility and the Cu-catalyst seems to be the most active independently on the reaction conditions,yielding nearly overlapped CO oxidation catalytic *** restingly,a stro ng correlation between the catalytic activity under the two conditions tested and the OSC values of the Ce_(0.8)Zr_(0.2)O_(2)-supported metal catalysts is ***,OSC parameter measured at 150℃ can be used as a relevant descriptor to evaluate the CO oxidation activity at low and medium conversions for the investigated catalysts,much better than the H_(2)-TPR measurements.

关键词： CO oxidation Low metal content Ceria-zirconia Copper species OSC parameter Rare earths

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西班牙猛禽生态毒理学:持久性环境污染物综述

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AMBIO－人类环境杂志 2008年第6期37卷 414-421页

作者： Antonio J.García-Fernández José F.Calvo emma martínez-López Pedro María-Mojica José e.martínez 高孟绪西班牙穆尔西亚(Murcia)大学

在西班牙进行环境污染物对猛禽种群压力的最早研究可追溯到20世纪80年代,通过多种角度使用多种前哨猛禽物种。然而,由于没有国家的监测计划,所以研究无论在时间或是空间上都是零星的。对金属的暴露并没有随着时间的推移变化,但存于卵和... 详细信息

在西班牙进行环境污染物对猛禽种群压力的最早研究可追溯到20世纪80年代,通过多种角度使用多种前哨猛禽物种。然而,由于没有国家的监测计划,所以研究无论在时间或是空间上都是零星的。对金属的暴露并没有随着时间的推移变化,但存于卵和组织中的铅浓度有所减少。一般来说,在西班牙猛禽样本中检测到的金属浓度通常很低,不足以产生毒副作用。除DDT和DDe,在过去的20年中西班牙猛禽类中大部分以有机氯为基础的杀虫剂已经减少。在几个不同物种的卵中所发现的DDe浓度可以部分地解释在西班牙猛禽能够成功繁殖的原因。

关键词：环境污染物猛禽类西班牙生态毒理学持久性综述金属浓度毒副作用

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Wood anatomical acclimation in the endemic genus Polylepis in Peruvian Andean forests

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Journal of Mountain Science 2024年第9期21卷 2986-3000页

作者： Anthony GUeRRA Fressia N.AMeS-martÍnez ernesto C.RODRÍGUeZ-RAMÍReZ Postgraduate Programme in Agronomy/Plant Physiology Department of Biology-Institute of Natural Sciences Federal University of LavrasLavras 37203-202Minas Gerais 30000-31999Brazil Laboratory of Biotechnology and Molecular Biology Continental UniversitySan Antonio UrbanizationHuancayo 12000Peru ecology and Biodiversity Research Programme ANDINUS AssociationMiguel Grau Street 370Huancayo 12000Peru Dendrochronology Laboratory Continental UniversitySan Carlos Avenue 1980Huancayo 12000Peru

Polylepis(Queñua)is a dominant woody plant genus in Andean Puna forests that occurs in a wide range of montane habitats and is ecologically diverse in endemism,which may be particularly threatened by climate *** anatomical traits are essential for understanding how plants adjust their ecophysiological requirements and maximize their resilience,resistance,and recovery to extreme *** the effects of extreme climatic conditions in high altitude ecosystems have been studied extensively,our knowledge is relatively limited to quantitative differences in the main xylem *** address this gap,we assessed the acclimation of wood anatomical traits in six Peruvian Andean Polylepis species with different water availability(semi-dry with high moisture and semiarid with dry winters).We selected hydraulic diameter,vessel density,vessel grouping index,solitary vessel index,vulnerability index,mesomorphy index,vessel element length,fiber length,fiber wall thickness,fiber lumen diameter,and total fiber diameter that can provide relevant eco-wood anatomical acclimation to hydric *** performed multivariate analysis to determine the leading dimensions of covariation among Polylepis species and climatic *** wood anatomical traits(vessel grouping index,vulnerability index,and fiber wall thickness)were dissimilar between xeric-and mesic-Polyelpis *** study demonstrates that wood anatomical traits in Peruvian Andean Polylepis species provides high-resolution and long-term eco-wood anatomical signals on how climate oscillations drive the acclimation processes of fiber and vessel *** findings underscore the significance of xylem hydraulic adjustment to various hydrological environments in Andean puna *** evaluating the effects of drought on wood anatomical characteristics and ecological function,we demonstrate the capacity of tree species to adapt and endure climate-related changes,thereby emphasizing their resilience and ada

关键词： Carlquist indices Climatic resilience Vessel traits Fiber Functional trait Hydric stress

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europium recovery process by means of polymeric nanoparticles functionalized with acrylic acid,curcumin and fumaramide

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Journal of Rare earths 2024年第10期42卷 1950-1959页

作者： P.A.martínez-Montoya J.M del Río A.de J.Morales-Ramirez M.Corea escuela Superior de Ingeniería Química e Industrias extractivas ESIQIE-IPNDepartamento de Ingeniería Metalúrgica UPALM S/N Col.LindavistaGustao A.MaderoCDMXC.P.07738Mexico escuela Superior de Ingenieria Química e Industrias extractivas ESIQIE-IPNLaboratorio de Investigación en Polímeros y NanomaterialesUPALM S/N Col.LindavistaGustavoA.MaderoCDMXC.P.07738Mexico Centra de Investigación e Innovación Tecnológica CIITEC-IPNCda.de CECATIs/nSanta CatarinaAzcapotzalcoC.P.02250CDMXMexico

Polymeric nanoparticles of poly(methyl methacrylate)were obtained by emulsion polymerization techniques in a proce ss of two *** particles were functionalized with acrylic acid,curcumin,and fumaramide and three series of polymeric particles were *** incorporation of functional groups was confirmed by Fourier transform-infrared spectrosocopy(FT-IR)and ultraviolet-visible(UV-Vis)*** spherical morphology of particles with an average diameter of 100 nm was observed by scartning electron microscopy(SeM).The polymeric materials were used for recovery of[eu]from synthetic *** nanoparticles show excellent chelation capacity to trap rare-earth ions,because they recover more than 85%of[eu]at pH of *** images of SeM after extraction process show arrays between particles with larger average particle sizes to 1.5 *** addition,the particles have a good stripping capacity,exceeding 50%of it,maintaining their homogeneity in morphology and good stability in dispersion for the recovery and stripping processes.A pseudo-second model order is obtained for the extraction and stripping processes while the best results of stripping process are obtained at pH of 6.

关键词： [eu]recovery Chelating effect extraction process Stripping process emulsion polymerization Rare earths

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5-Bromo-2'-deoxyuridine labeling:historical perspectives,factors infiuencing the detection,toxicity,and its implications in the neurogenesis

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Neural Regeneration Research 2024年第2期19卷 302-308页

作者： Joaquín martí-Clúa Unidad de Citología e Histología.Departament de Biologia Cel·lular de Fisiologia i d’Immunologia.Facultad de Biociencias.Institut de Neurociències.Universidad Autónoma de Barcelona08193 BellaterraBarcelonaSpain

The halopyrimidine 5-bromo-2′-deoxyuridine(BrdU)is an exogenous marker of DNA *** the introduction of monoclonal antibodies against BrdU,an increasing number of methodologies have been used for the immunodetection of this synthesized bromine-tagged base analogue into replicating *** labeling is widely used for identifying neuron precursors and following their fate during the embryonic,perinatal,and adult neurogenesis in a variety of vertebrate species including birds,reptiles,and *** to BrdU toxicity,its incorporation into replicating DNA presents adverse consequences on the generation,survival,and settled patterns of *** may lead to false results and misinterpretation in the identification of proliferative *** this review,I will indicate the detrimental effects of this nucleoside during the development of the central nervous system,as well as the reliability of BrdU labeling to detect proliferating ***,it will show factors influencing BrdU immunodetection and the contribution of this nucleoside to the study of prenatal,perinatal,and adult *** adult neurogenesis will also be *** is my hope that this review serves as a reference for those researchers who focused on detecting cells that are in the synthetic phase of the cell cycle.

关键词： 5-bromo-2′-deoxyuridine adult neurogenesis human adult neurogenesis labeling pitfalls prenatal neurogenesis proliferation S-phase suturing S-phase toxicity

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On the Use of Monotonicity-Preserving Interpolatory Techniques in Multilevel Schemes for Balance Laws

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Communications on Applied Mathematics and Computation 2024年第2期6卷 1319-1341页

作者： Antonio Baeza Rosa Donat Anna martinez-Gavara Department de Matematiques Universitat de ValenciaDr.Moliner5046100 BurjassotValenciaSpain Department d'estadistica i Investigacio Operativa Universitat de ValenciaDr.Moliner5046100BurjassotValenciaSpain

Cost-effective multilevel techniques for homogeneous hyperbolic conservation laws are very successful in reducing the computational cost associated to high resolution shock capturing numerical *** they do not involve any special data structure,and do not induce savings in memory requirements,they are easily implemented on existing codes and are recommended for 1D and 2D simulations when intensive testing is *** multilevel technique can also be applied to balance laws,but in this case,numerical errors may be induced by the *** present a series of numerical tests that point out that the use of monotonicity-preserving interpolatory techniques eliminates the numerical errors observed when using the usual 4-point centered Lagrange interpolation,and leads to a more robust multilevel code for balance laws,while maintaining the efficiency rates observed forhyperbolic conservation laws.

关键词： Hyperbolic balance laws Well-balanced schemes Multilevel schemes Harten's multiresolution

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