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Grasshoppers （Orthoptera： Acrididae） select vegetation patches in local-scale responses to foliar nitrogen but not phosphorus in native grassland

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Insect Science 2011年第5期18卷 533-540页

作者： Viviana loaiza Jayne L. Jonas Anthony Joern Division of Biology Kansas State University Manhattan Kansas USA

Key elements such as nitrogen （N） and phosphorus （P） are often limiting relative to the nutritional needs of herbivores that feed on them. While N often limits insect herbivores in natural terrestrial ecosystems, the effect of P is poorly studied in the field, even though compelling hypotheses from the ecological stoichiometry literature predict its importance. We evaluated small-scale spatial distributions of, and herbivory by, grasshoppers among neighboring plots that vary in foliar-N and -P in tallgrass prairie. Grasshopper densities were 67% greater in N-fertilized plots but detected no effect to grasshopper densities from P-fertilizer. Leaf damage to the dominant grass Andropogon gerardii was 32% greater in N-fertilized plots, but no response to foliar-P was detected. Herbivore damage to a common forb, goldenrod （Solidago missouriensis）, was not strongly linked by fertilizer treatments, although there was increased leaf damage in N-fertilizer treatments when no P was applied （a significant N ~ P interaction）. Under field conditions at local scales, we conclude that spatially heterogeneous distributions of grasshoppers are primarily affected by foliar-N in host plants with little evidence that P-levels contribute to the spatial patterns.

关键词： Andropogon gerardii ecological stoichiometry insect herbivory Konza Prairie N-P fertilization experiment Solidago rnissouriensis

CALLISTO facilities in Peru:spectrometer commissioning and observations of typeⅢsolar radio bursts

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Research in Astronomy and Astrophysics 2021年第6期21卷 329-336页

作者： Javier Alonso Rengifo Veronica loaiza-Tacuri Jose Bazo Walter Robert Guevara Day Seccion FIsica Departamento de CienciasPontificia Universidad Catolica del PeruAv.Universitaria 1801Lima 32Peru Direction de Astroflsica Comision National de Investigacion y Desarrollo AeroespacialCONIDALuis Felipe Villaran 1069LimaPeru Observatorio National Rua General Jose Cristino7720921-400 Sao CristovaoRio de JaneiroRJBrazil Facultad de Ciencias Ffsicas Universidad Nacional Mayor de San MarcosP.O.Box 14-149Lima 14Peru

The Astrophysics Directorate of CONIDA has installed two radio spectrometer stations belonging to the e-CALLISTO network in Lima,*** their strategic location near the Equator,it is possible to observe the Sun evenly throughout the whole *** receiver located at Pucusana,nearby the capital city of Lima,took data from October 2014 until August 2016 in the metric and decimetric bands looking for radio *** this period,this e-CALLISTO detector was unique in its time-zone *** asses the suitability of the sites and the performance of the antennas,we analyzed the radio ambient background and measured their radiation pattern and *** demonstrate the capabilities of the facilities for studying solar dynamics in these radio frequencies,we have selected and analyzed typeⅢSolar Radio *** study of this kind of burst helps to understand the electron beams traversing the solar corona and the solar atmospheric *** have characterized the most common radio bursts with the following mean values:a negative drift rate of-25.8±3.7 MHz s^(-1),a duration of 2.6±0.3 s and 35 MHz bandwidth in the frequency range of 114 to 174 *** addition,for some events,it was possible to calculate a global frequency drift which on average was 0.4±0.1 MHz s^(-1).

关键词： instrumentation:spectrographs Sun:radio radiation

Variation in abundance and habitat relationship of three understory insectivorous birds in a disturbed landscape of Neotropical dry forest of Colombia

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Avian Research 2020年第3期11卷 265-276页

作者： Camilo loaiza Olga LMontenegro David King Manuel Spínola Lilibeth Arinda Palacio Agustín Rudas Instituto de Ciencias Naturales Universidad Nacional de ColombiaBogotáColombia Northern Research Station USDA Forest ServiceUniversity of Massachusetts204 Holdsworth HallAmherstMA 01003USA Instituto Internacional en Conservación y Manejo de Vida Silvestre Universidad NacionalApartado1350-3000 HerediaCosta Rica.

Background:Evaluating relationships between avian populations and their habitat is important for understanding the biology of these species and for management decisions that improve the effectiveness of restoration *** investigated how habitat variation along a disturbance gradient affected the abundance of three insectivorous bird species,White-bellied Antbird(Myrmeciza longipes),Barred Antshrike(Thamnophilus doliatus),and Pale-breasted Spinetail(Synallaxis albescens)in a Neotropical dry forest remnant in central ***:The study area,which is located in Magdalena Valley,is under ecological restoration after the construction of the“El Quimbo”hydroelectric dam,with a gradient of habitat conditions,from relatively advanced secondary growth to recently disturbed *** conducted bird surveys and quantified the habitat conditions from June 2018 to June *** compared the relative abundance of the birds among the three zones with increasing disturbance and modeled the relationship between the bird abundance with the micro-and landscape-habitat conditions,with Poisson generalized linear model ***:The relative abundance of the three bird species varied according to the habitat features and disturbance *** abundance of White-bellied Antbirds was higher in forests and thickets than shrubland fragments;Barred Antshrike was more abundant in shrubland and thickets than in forest fragments,and Pale-breasted Spinetail had the highest abundance in shrubland and the lowest in forest *** abundance of both White-bellied Antbird and Pale-breasted Spinetail did not differ among zones with different levels of disturbance,while the abundance of Barred Antshrike decreased in zones with more ***:There were significant differences in the habitat relationships of the three understory insectivorous species along the disturbance gradient,although these species were within the same trophic *** bird species prefer

关键词： Bird population ecology Generalized linear models Wildlife habitat restoration

Exceptional points of any order in a single, lossy waveguide beam splitter by photon-numberresolved detection

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Photonics Research 2019年第8期7卷 862-867页

作者： MARIO AQUIROZ-JUAREZ ARMANDO PEREZ-LEIJA KONRAD TSCHERNIG BLAS MRODRIGUEZ-LARA OMAR SMAGANA-loaiza KURT BUSCH YOGESH NJOGLEKAR ROBERTO DE JLEON-MONTIEL Instituto de Ciencias Nucleares Universidad Nacional Autonoma de MexicoApartado Postal70-54304510Cd.Mx.Mexico Max-Born-Institut Max-Born-StraBe2A12489BerlinGermany Humboldt-Universitat zu Berlin Institut fur PhysikAG Theoretische Optik & PhotonikD-12489BerlinGermany Tecnologico de Monterrey Escuela de Ingenieria y CienciasAve.Eugenio Garza Sada250164849MonterreyN.L.Mexico Instituto Nacional de Astrofisica optica y ElectronicaCalle Luis Enrique Erro No.1Sta.Ma.TonantzintlaPue.CP72840Mexico Department of Physics and Astronomy Louisiana State UniversityBaton RougeLouisiana70803USA Department of Physics Indiana University Purdue University Indianapolis(IUPUI)IndianapolisIndiana46202USA

Exceptional points(EPs) are degeneracies of non-Hermitian operators where, in addition to the eigenvalues, the corresponding eigenmodes become degenerate. Classical and quantum photonic systems with EPs have attracted tremendous attention due to their unusual properties, topological features, and an enhanced sensitivity that depends on the order of the EP, i.e., the number of degenerate eigenmodes. Yet, experimentally engineering higher-order EPs in classical or quantum domains remain an open challenge due to the stringent symmetry constraints that are required for the coalescence of multiple eigenmodes. Here, we analytically show that the number-resolved dynamics of a single, lossy waveguide beam splitter, excited by N indistinguishable photons and post-selected to the N-photon subspace, will exhibit an EP of order N+1. By using the well-established mapping between a beam splitter Hamiltonian and the perfect state transfer model in the photon-number space,we analytically obtain the time evolution of a general N-photon state and numerically simulate the system’s evolution in the post-selected manifold. Our results pave the way toward realizing robust, arbitrary-order EPs on demand in a single device.

关键词： EP Exceptional points photon-numberresolved detection

Preferential Transport and Metabolism of Glucose in Bergmann Glia over Purkinje Cells:A Multiphoton Study of Cerebellar Slices

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神经损伤与功能重建 2009年第3期4卷 208-216页

作者： L.F.BARROS R.COURJARET P.JAKOBY A.loaiza C.LOHR J.W.DEITMER Centro de Estudios Científicos (CECS) CIN(Centro de Ingeniería de la Innovación del CECS) Abteilung für Allgemeine Zoologie Fachbaraich BiologieTU Kaiserslautern Universidad Austral de Chile

了解不同类型的细胞如何处理葡萄糖有助于解释能量供应是如何是如何根据大脑能量需求来进行调整的。荧光追踪结合共聚焦显微镜技术已用于研究培养的脑细胞摄取葡萄糖的实时动态过程。本文采用这种技术利用多光子显微镜观察急性制备的大... 详细信息

了解不同类型的细胞如何处理葡萄糖有助于解释能量供应是如何是如何根据大脑能量需求来进行调整的。荧光追踪结合共聚焦显微镜技术已用于研究培养的脑细胞摄取葡萄糖的实时动态过程。本文采用这种技术利用多光子显微镜观察急性制备的大鼠小脑脑片。带荧光的葡萄糖类似物2NBDG和6NBDG在小脑皮质的分子层中的转运速度比其在蒲肯野细胞胞体和颗粒细胞中快若干倍。洗脱游离示踪剂后,可见大部分磷酸化示踪剂都位于Bergmann胶质细胞,用胶质细胞标记物sulforhodamine 101免疫染色后进一步确认这一结果。有效回收荧光光漂白后显示,2NBDG-P可通过Bergmann胶质细胞之间的缝隙连接沿着分子层水平扩散。本文的结果表明在急性小脑切片中,Bergmann胶质细胞对葡萄糖的转运能力和糖酵解率高于蒲肯野细胞若干倍。由于小脑主要由葡萄糖提供能量,蒲肯野神经元被认为比Bergmann胶质细胞更耗能量,这些结果表明,在胶质细胞和神经元之间存在类似乳酸的能量代谢物介导的环路。

关键词：脑片小脑葡萄糖 NBDG 转运己糖激酶

Digital spiral object identification using random light

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Light(Science & Applications) 2017年第1期6卷 708-712页

作者： Zhe Yang Omar S Magaña-loaiza Mohammad Mirhosseini Yiyu Zhou Boshen Gao Lu Gao Seyed Mohammad Hashemi Rafsanjani Gui-Lu Long Robert W Boyd State Key Laboratory of Low-dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China The Institute of Optics University of RochesterRochesterNew York 14627USA School of Science China University of GeosciencesBeijing 100083China Tsinghua National Laboratory for Information Science and Technology Beijing 100084China Department of Physics University of OttawaOttawa ON K1N 6N5OntarioCanada

Photons that are entangled or correlated in orbital angular momentum have been extensively used for remote sensing,object identification and *** has recently been demonstrated that intensity fluctuations give rise to the formation of correlations in the orbital angular momentum components and angular positions of random *** we demonstrate that the spatial signatures and phase information of an object with rotational symmetries can be identified using classical orbital angular momentum correlations in random *** Fourier components imprinted in the digital spiral spectrum of the object,as measured through intensity correlations,unveil its spatial and phase *** similarities with conventional compressive sensing protocols that exploit sparsity to reduce the number of measurements required to reconstruct a signal,our technique allows sensing of an object with fewer measurements than other schemes that use pixel-by-pixel *** remarkable advantage of our technique is that it does not require the preparation of fragile quantum states of light and operates at both low-and high-light *** addition,our technique is robust against environmental noise,a fundamental feature of any realistic scheme for remote sensing.

关键词： object identification orbital angular momentum random light remote sensing second-order correlation

Clinical features and radiological manifestations of COVID-19 disease

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World Journal of Radiology 2020年第11期12卷 247-260页

作者： Pedro Landete Carlos Andres Quezada loaiza Beatriz Aldave-Orzaiz Susana Hernandez Muniz Antonio Maldonado Enrique Zamora Allan Charles Sam Cerna Elia del Cerro Raquel Cano Alonso Felipe Counago Department of Pulmonology H.U.La PrincesaMadrid 28006Spain Department of Pulmonology H.12 de OctubreMadrid 28041Spain Department of Radiologist H.U.La PrincesaMadrid 28006Spain Department of Radiation Oncology Hospital Universitario Quironsalud MadridMadrid 28223Spain Department of Pulmonology Hospital MD Anderson Madrid.EspanaMadrid 28033Spain Department of Diagnostic Imaging Hospital Universitario Quiron MadridMadrid 28223Spain Department of Radiation Oncology Hospital La LuzUniversidad Europea de MadridMadrid 28028Spain

Coronavirus disease 2019(COVID-19)was discovered after unusual cases of severe pneumonia emerged in December 2019 in Wuhan Province(China).Coronavirus is a family of single-stranded RNA *** acute respiratory syndrome coronavirus 2(SARS-CoV-2)is transmitted from person to *** asymptomatic individuals can transmit the virus,symptomatic patients are more *** incubation period ranges from 3-7 d and symptoms are mainly respiratory,including pneumonia or pulmonary embolism in severe *** serum levels of interleukins(IL)-2,IL-6,IL-7 indicate the presence of cytokine release syndrome,which is associated with disease *** disease has three main phases:Viral infection,pulmonary involvement,and *** date,no treatment has proved to be safe or *** X-ray and computed tomography(CT)are the primary imaging tests for diagnosis of SARS-CoV-2 pneumonia,follow-up,and detection of *** main radiological findings are ground-glass opacification and areas of *** long-term clinical course is unknown,although some patients may develop pulmonary *** emission tomography-computed tomography(PETCT)is useful to assess pulmonary involvement,to define the affected areas,and to assess treatment *** pathophysiology and clinical course of COVID-19 infection remain poorly ***,patterns detected on CT and PETCT may help to diagnose and guide *** this mini review,we analyze the clinical manifestations and radiological findings of COVID-19 infection.

关键词： COVID-19 Coronavirus Natural history Clinical features Pathogenesis Radiology images

Novel LIPA mutations in Mexican siblings with lysosomal acid lipase deficiency

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World Journal of Gastroenterology 2015年第3期21卷 1001-1008页

作者： Yuritzi Santillán-Hernández Enory Almanza-Miranda Winnie W Xin Kendrick Goss Aurea Vera-loaiza María T Gorráez-de la Mora Raul E Pina-Aguilar Medical Genetics Department Centro Médico Nacional "20 de Noviembre"ISSSTEMéxico City 03100México Pediatric Gastroenterology Department Centro Médico Nacional "20 de Noviembre"ISSSTEMéxico City 03229México Neurogenetics DNA Diagnostic Laboratory Massachusetts General HospitalBostonMA 02114United States Pathology Department Centro Médico Nacional "20 de Noviembre"ISSSTEMéxico City 03229México Medical Genomics Division Centro Médico Nacional "20 de Noviembre"ISSSTEMéxico City 03100México

Lysosomal acid lipase(LAL) deficiency is an underrecognized lysosomal disease caused by deficient enzymatic activity of *** this report we describe two affected female Mexican siblings with early hepatic *** two months of age,the first sibling presented with alternating episodes of diarrhea and constipation,and later with hepatomegaly,elevated transaminases,high levels of total and low-density lipoprotein cholesterol,and low levels of highdensity *** hypertension and grade 2 esophageal varices were detected at four years of *** second sibling presented with hepatomegaly,elevated transaminases and mildly elevated lowdensity lipoprotein and low high-density lipoprotein at six months of *** activity was deficient in both *** of LIPA revealed two previously unreported heterozygous mutations in exon 4:c.253C>A and c.294C>*** cases highlight the clinical continuum between the so-called Wolman disease and cholesteryl ester storage disease,and underscore that LAL deficiency represents a single disease with a degree of clinical heterogeneity.

关键词： Cholesteryl ester storage disease Liver fibrosis Dyslipidemia Liver steatosis Wolman disease

A Simulation Model for Sexual and Vectorial Transmission of Zika Virus(ZIKV)

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Open Journal of Modelling and Simulation 2017年第1期5卷 70-82页

作者： Oscar Arias Manrique Dalia M.Munoz Pizza Anibal Munoz loaiza Julian A.Olarte Garcia Carlos A.Abello Munoz Steven Raigosa Osorio Angie Johanna Osorio Hans Meyer Contreras John F.Arredondo Montoya Grupo de Modelacion Matematica en Epidemiologia(GMME) Facultad de EducacionUniversidad del QuindioQuindioColombia

Nowadays the Zika virus (ZIKV) has been one of the most studied vector-borne diseases due to the considerable outbreaks that have generated around the world as well as due to the new transmission mechanisms and health complications originated. According to statistics of the INS-Colombia for July 2016, 68% of the population infected by ZIKV (confirmed cases) are pregnant women. Furthermore, the Quindío department belongs to the states with more than 50% of the total infected persons being pregnant women. Taking into account those characteristics, a theoretical model is proposed and analyzed to describe the population dynamics considering the sexual and vectorial transmission of ZIKV, with special emphasis in the consequences of the non-vectorial transmission in the population. The obtained results with simulations through the beta parameter indicate that the probability of sexual transmission between susceptible women and infected men points out the importance of campaigns to inculcate prevention measures for the safe sexual relationships between ZIKV infected population.

关键词： ZIKV Model Dynamics Sexual Transmission Vectorial Transmission