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Seasonal variation in native hydraulic conductivity between two deciduous oak species

Journal of Plant Ecology 2020年第1期13卷 78-86页

作者： Dilia Mota-Gutiérrez Guadalupe Arreola-González Rafael Aguilar-Romero Horacio Paz Jeannine Cavender-Bares Ken Oyama Antonio Gonzalez-Rodriguez fernando pineda-garcía Facultad de Biología Universidad Michoacana de San Nicolás de Hidalgo.Edificio RCiudad UniversitariaGral.Francisco J.Múgica S/N A-1Felicitas de Río58030 MoreliaMichoacánMexico Escuela Nacional de Estudios Superiores Unidad MoreliaUniversidad Nacional Autónoma de México.Antigua Carretera a Pátzcuaro 8701Ex-Hacienda de San Joséde La Huerta58190 MoreliaMichoacánMexico Instituto de Investigaciones en Ecosistemas y Sustentabilidad Campus MoreliaUniversidad Nacional Autónoma de México.Antigua Carretera a Pátzcuaro 8701Ex-Hacienda de San Joséde La Huerta58190 MoreliaMichoacánMexico Deparment of Ecology Evolution and BehaviorUniversity of MinnesotaSaint PaulMN 55108USA

Aims Mechanisms of plant drought resistance include both tolerance and *** vulnerability to embolism and turgor loss point are considered traits that confer tolerance,while leaf abscission and deciduousness characterizes the avoidance *** these mechanisms are thought to trade-off expressing a continuum among species,little is known on how variation in the timing and duration of leaf shedding in response to drought affect the relationship between xylem and leaf *** the present study,we explored the extent to which drought tolerance differs between two oak(Quercus)species that exhibit different leaf shedding ***,we predicted that *** Trel.,which loses leaves at the end of the dry season(late-deciduous)and is thus exposed to a greater risk of cavitation,would be more drought tolerant and more conservative in its water use than *** Liebm.,which loses its leaves for only a short period of time in the middle of the dry season(brevideciduous).Methods The study was conducted in central Mexico in a single population of each of the two oak species,separated from each other by a distance of 1.58 km,and by an altitudinal difference of 191 *** deserticola(late deciduous)is more frequent down slope,while ***(brevideciduous)tends to occur at higher elevations along the *** assessed seasonal differences(rainy versus dry season)in native stem hydraulic conductivity,and tested for variation in xylem vulnerability to cavitation,leaf water use and leaf turgor loss point between the two *** Findings The two oak species did not differ in traits conferring drought tolerance,including xylem vulnerability to embolism,leaf turgor loss point,or stomatal ***,both species had different performance during the dry season;the brevideciduous species had lower negative impact in the xylem function than the late-deciduous ***,seasonal changes in plant physiological performance

关键词： Quercus hydraulic conductivity embolisms leaf phenology

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Plasmodium vivax cerebral malaria complicated with venous sinus thrombosis in Colombia

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Asian Pacific Journal of Tropical Medicine 2013年第5期6卷 413-415页

作者： Miguel A Pinzon Juan C pineda fernando Rosso Masaru Shinchi Fabio Bonilla-Abadia Department of Infectious Diseases Hospital San Vicente de PaulMedellinColombia Department of Internal Medicine Fundacion Clinica Valle del LiliICESI UniversityCaliColombia Department of Infectious Diseases Fundacion Clinica Valle del LiliCaliColombia Department of Neurology Fundacion Clinica Valle del LiliCuliColombia Department of Rheumatology Fundacion Clinica Valle del LiliICESI UniversityCaliColombia

Complicated malaria is usually due to Plasmodium ***,Plasmodium vivax is infrequently related with life-threatening *** cases have been reported of severe Plasmodium vivax infection,and most of them from Southeast Asia and *** report the first case of cerebral malaria due to Plasmodium vivax in Latin America,complicated with sagittal sinus thrombosis and confirmed by a molecular method.

关键词： Cerebral malaria Vivax malaria Plasmodium vivax Intracranial sinus thrombosis

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Product yields of stabilized Criegee intermediates in the ozonolysis reactions of cis-2-butene, 2-methyl-2-butene, cyclopentene, and cyclohexene

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Science China Chemistry 2018年第7期61卷 850-856页

作者： Mixtli Campos-pineda Jingsong Zhang Department of Chemistry and Air Pollution Research Center University of California

Cavity ring-down spectroscopy(CRDS)was utilized in combination with chemical titration with sulfur dioxide(SO_2)to quantify stabilized Criegee intermediates(s CIs)produced at low pressures(4–20 Torr)in ozonolysis reactions of cis-2-butene,2-methyl-2-butene,cyclopentene,and *** yield of stabilized s CI,acetaldehyde oxide(CH_3CHOO),from cis-2-butene ozonolysis decreased with decreasing pressure and reached to 0.05±0.04 at the zero-pressure *** nonsymmetric alkene 2-methyl-2-butene produced two stabilized s CIs,CH_3CHOO and acetone oxide((CH_3)_2COO),and their total yield decreased with decreasing pressure and reached 0.01±0.03 at the zero-pressure *** cyclopentene and cyclohexene,the s CI yields were essentially constant near zero,as expected of endocyclic *** nascent yields of s CI of various alkenes are compared.

关键词： ozonolysis stabilized Criegee intermediates cavity ring-down spectroscopy

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-592 and -1082 interleukin-10 polymorphisms in pulmonary tuberculosis with type 2 diabetes

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Asian Pacific Journal of Tropical Medicine 2013年第7期6卷 505-509页

作者： Guadalupe garcía-Elorriaga Leila Vera-Ramírez Guillermo del Rey-pineda Csar Gonzlez-Bonilla Unidad de Investigación Mdica en Inmunología e Infectología Hospital de InfectologíaCentro Mdico Nacional La Raza(CMNR)Instituto Mexicano del Seguro Social(IMSS)Mexico CityMexico Banco Central de Sangre CMNRIMSSand Departamento de Infectología.Hospital Infantil de Mxico Federico Gómez.Secretaría de Salud(SSA) Mexico City.Mexico

Objective:To determine the polymorphisms of Interleukin-10(IL-10)(-592,-1082) in pulmonary tuberculosis(PTB)with and without type 2 diabetes(T2D).Methods:We studied a Mexican mestizo population of 37 patients with TB in remission(TBr) and 40 with active pulmonary TB (PTB),21 patients with TB + T2D.47 blood donors accepted,and 13 healthy health-care workers with tuberculin skin lest *** of IL-10 polymorphisms was performed by real-lime Polymerase chain ***:IL-10-592C/A presented in a greater proportion in healthy individuals than in patients with type 2 diabetes and TB in a not quite significant statistically ***-10-1082A/A presented more frequently in the group of patients with both diseases,not being statistically significant in comparison with the group of healthy subjects. Conclusions:This study describes two important new ***,it reveals that the IL-10 (-592 A/A and -592 C/C) polymorphisms were found in a greater proportion in a group of patients with T2D and TB than in healthy ***,the study provides evidence that the(-1082 G/G) polymorphism presented with greater frequency in healthy individuals than in patients with both ol these diseases.

关键词： Cytokines IL-10 Polymorphism Genotype Pulmonary tuberculosis

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NPV risk simulation of an open pit gold mine project under the O'Hara cost model by using Gas

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International Journal of Mining Science and Technology 2017年第3期27卷 557-565页

作者： Franco-Sepulveda Giovanni Campuzano Carlos pineda Cindy Department of Materials and Minerals National University of Colombia Medellin 050036 Colombia

This paper analyzes an open pit gold mine project based on the O'Hara cost model. Hypothetical data is proposed based on different authors that have studied open pit gold projects, and variations are proposed according to the probability distributions associated to key variables affecting the NPV, like production level, ore grade, price of ore, and others, so as to see what if, in a gold open pit mine project of 3000 metric tons per day of ore. Two case scenarios were analyzed to simulate the NPV, one where there is low certainty data available, and the other where the information available is of high certainty. Results based on genetic algorithm metaheuristic simulations, which combine basically Montecarlo simulations provided by the Palisade Risk software, the O'Hara cost model, net smelter return and financial analysis tools offered by Excel are reported, in order to determine to which variables of the project is more sensitive the NPV.

关键词： Genetic algorithms(GAs) O’Hara cost model Montecarlo simulation Open pit gold mine NPV risk analysis

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Using electricity options to hedge against financial risks of power producers

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Journal of Modern Power Systems and Clean Energy 2013年第2期1卷 101-109页

作者： Salvador pineda Antonio J.CONEJO Center for Electric Technology Department of Electrical EngineeringTechnical University of DenmarkKgs.LyngbyDenmark University of Castilla-La Mancha Ciudad RealSpain

As a consequence of competition in electricity markets,a wide variety of financial derivatives have emerged to allow market agents to hedge against *** options and forward contracts constitute adequate instruments to manage the financial risks pertaining to price volatility or unexpected unit failures faced by power producers.A multi-stage stochastic model is described in this tutorial paper to determine the optimal forward and option contracting decisions for a risk-averse power *** key features of electricity options to reduce both price and availability risks are illustrated by using two examples.

关键词： Price risk Availability risk Stochastic programming Forward contracts Electricity options

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Resveratrol as an inductor of autophagy: is there a unique pathway of activation?

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Neural Regeneration Research 2021年第1期16卷 101-103页

作者： Narayana pineda-Ramírez Penélope Aguilera Laboratorio de Patología Vascular Cerebral.Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez Ciudad de MéxicoMéxico

Autophagy is a process of cellular degradation for the removal of damaged components and eventual recycling of the resulting molecules that help to the maintenance of cellular *** this pathway,proteins with relatively long half-life and whole organelles(e.g.,mitochondria,peroxisomes,and ribosomes)are degraded in the cytoplasm for the continuous turnover of cellular structures to facilitate their ***,the beneficial effect of autophagy goes beyond cellular“cleaning”and resides to a large extent on its ability to recycle cell components back into the ***,autophagy is a fundamental mechanism to regulate cellular functions,including DNA repair,proliferation,differentiation,embryonic development,and the immune response.

关键词： homeostasis activation autophagy

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Tuberculosis and hematopoietic stem cell transplant: Review of a difficult and often underestimated problem

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World Journal of Clinical Infectious Diseases 2013年第4期3卷 70-78页

作者： Guadalupe garcía-Elorriaga Guillermo del Rey-pineda Hospital for Infectious Disease "La Raza" National Medical Center Department of Infectious Disease and Intestinal Bacteriology Laboratory "Federico Gómez"Children’s HospitalDepartment of Health Central Blood Bank "La Raza"National Medical Center Social Security Mexican Institute

Recipients of solid organ transplants(SOT) and stem cell transplants(SCT) constitute a group of patients at risk for tuberculosis(TB) development. The prevalence of active TB in patients undergoing SOT is higher than in patients undergoing SCT, probably due to the shorter period of immunosuppression in the latter. We reviewed the importance of SCT in individuals with hematological malignancies. Most TB cases occur in transplant patients by reactivation of latent infection after immunosuppression, most often within the first year after transplant, leading to graft loss and in some cases, death. Relevant variables to assess the risk of TB infection in a transplant recipient include the donor's and recipient's medical histories, imaging results, microbiology and tuberculin skin test(TST) and interferon-gamma release assays(IGRA). TST is routinely performed in the donor and recipient before transplantation. If TST is > 5 mm in the recipient or > 10 mm in the donor, it is necessary to exclude active TB(pulmonary and renal). Chemopro-phylaxis is recommended in TST(+) recipients and in recipients with recent seroconversion, in donors with a history of untreated TB or in contact with an individual with active TB, if radiological images are suspicious and the IGRA is(+). The drug of choice is isoniazid. These topics are herewith reviewed.

关键词： Tuberculosis Prophylaxis Transplant Solid organ transplantation Hematopoietic stem cell transplantation

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Influence of oscillation strain on the dynamic mechanical relaxation of a La-based metallic glass

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Science China(Technological Sciences) 2023年第11期66卷 3309-3316页

作者： LIANG ShuYi ZHANG LangTing WANG YunJiang pineda E QIAO JiChao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de Catalunya–BarcelonaTechBarcelona 08019Spain Innovation Center NPU-ChongqingChongqing 401135China

Dynamic mechanical relaxation processes,particularly secondary relaxation processes,are closely related to the mechanical and physical properties of metallic *** the effect of oscillation strain amplitude on the secondary relaxation of a typical Labased metallic glass was studied using the dynamic mechanical analysis *** apparent activation energy of theβrelaxation is shown to increase with the oscillation strain *** it changes from 0.02%to 0.16%,the activation energy increases from 0.73 to 0.96 ***,the intensity of theβrelaxation shifts toward high ***,the apparentβrelaxation is found to be sensitive to the physical aging below the glass transition *** findings suggest a correlation between the inelastic deformation and the relaxation behavior of amorphous metals.

关键词： metallic glass dynamic mechanical analysis internal friction βrelaxation oscillation amplitude

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Method of cells-based multiscale modeling of elastic properties of filament wound C/C-SiC including free Si and matrix porosity

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Journal of Materials Science & Technology 2019年第12期35卷 2906-2918页

作者： Evan J.pineda Marek Fassin Stefanie Reese Jaan-Willem Simon NASA Glenn Research Center 21000 Brookpark RoadMS 49/7ClevelandOH 44135United States Institute for Applied Mechanics RWTH Aachen UniversityMies-van-der-Rohe-Str.152074 AachenGermany

Three different multiscale models, based on the method of cells(generalized and high fidelity) micromechanics models were developed and used to predict the elastic properties of C/C-SiC composites. In particular, the following multiscale modeling strategies were employed: Concurrent modeling of all phases using the generalized method of cells, synergistic(two-way coupling in space) multiscale modeling with the generalized method of cells, and hierarchical(one-way coupling in space) multiscale modeling with the high fidelity generalized method of cells. The three models are validated against data from a hierarchical multiscale finite element model in the literature for a repeating unit cell of C/***, the multiscale models are used in conjunction with classical lamination theory to predict the stiffness of C/C-SiC plates manufactured via a wet filament winding and liquid silicon infiltration process recently developed by the German Aerospace Institute. Finally, un-reacted Si(or free Si) and porosity in the C matrix are included in the multiscale model, and the effect of these new phases on the stiffness and local stresses are considered.

关键词： Multiscale modeling C/C-SiC Ceramic matrix composites

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