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Pyrenetetraone-based covalent organic framework as an effective electrocatalyst for oxygen reduction reaction

Nano Research 2022年第5期15卷 3907-3912页

作者： Paloma Garcia-Arroyo Emiliano Martinez-Perinan jorge j.cabrera-trujillo Elena Salagre Enrique G.Michel jose I.Martinez Encarnacion Lorenzo jose L.Segura Departamento de Quimica Organica I Facultad de CC.QuimicasUniversidad Complutense de Madrid28040 MadridSpain Departamento de Quimica Analitica y Analisis Instrumental Facultad de CienciasUniversidad Autónoma de Madrid28049 MadridSpain Departamento de Fisica de la Materia Condensada Universidad Autónoma de Madrid28049 MadridSpain Condensed Matter Physics Center(IFIMAC) Universidad Autónoma de Madrid28049 MadridSpain Departamento de Nanoestructuras SuperficiesRecubrimientos y Astrofisica MolecularInstituto de Ciencia de Materiales de Madrid(ICMMCSIC)28049 MadridSpain Instituto Madrileno de Estudios Avanzados en Nanociencia(IMDEA-Nanociencia) 28049 MadridSpain Institute for Advanced Research in Chemical Sciences(IAdChem) Universidad Autonoma de Madrid28049 MadridSpain

A novel porous and crystalline two-dimensional(2D)electrochemically active covalent organic framework(COF)based on ortho-quinone units has been prepared as an innovative approach towards the development of organic cathode materials with multiple redox sites as an efficient electrocatalyst for the oxygen reduction reaction(ORR).In contrast with most of the previously reported COFs as electrocatalysts for the ORR,the electrocatalytic application of this material towards ORR has been investigated without adding any metal or conductive supporting material and avoiding any additional carbonization ***,the electrochemical properties of the COF material have been compared with two analogue amorphous frameworks with similar chemical composition,which points out the important role of the enhanced crystallinity and porosity of the COF network in its superior performance as an electrocatalyst towards ORR.

关键词： electrocatalysis oxygen reduction reaction metal free pyrenetetraone covalent organic framework

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Elenoside increases intestinal motility

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World journal of Gastroenterology 2006年第44期12卷 7143-7148页

作者： E Navarro Sj Alonso R Navarro j trujillo E jorge Department of Pharmacology Faculty of Medicine University of La Laguna 38071 La Laguna Apdo. 55 Tenerife Canary Islands Spain Department of Medical and Chirurgical Sciences University of Las Palmas Gran Canaria Canary Islands Spain Centro de Productos Naturales y Agrobiologia CSIC Tenerife Canary Islands Spain

AIM： TO study the effects of elenoside, an arylnaphthalene lignan from justicia hyssopifolia, on gastrointestinal motility in vivo and in vitro in rats. METHODS： Routine in vivo experimental assessments were catharsis index, water percentage of boluses, intestinal transit, and codeine antagonism. The groups included were vehicle control （propylene glycol-ethanolplant oil-tween 80）, elenoside （i.p. 25 and 50 mg/kg）, cisapride （i.p. 10 mg/kg）, and codeine phosphate （intragastric route, 50 mg/kg）. In v/tro approaches used isolated rat intestinal tissues （duodenum, jejunum, and ileum）. The effects of elenoside at concentrations of 3.2 ×10^4, 6.4 ×10^4 and 1.2 ×10^3 mol/L, and cisapride at 10^6 mol/L were investigated. RESULTS： Elenoside in vivo produced an increase in the catharsis index and water percentage of boluses and in the percentage of distance traveled by a suspension of activated charcoal. Codeine phosphate antagonized the effect of 25 mg/kg of elenoside. In vitro, elenoside in duodenum, jejunum and ileum produced an initial decrease in the contraction force followed by an increase. Elenoslde resulted in decreased intestinal frequency in duodenum, jejunum, and ileum. The in vitro and in vivo effects of elenoside were similar to those produced by cisapride. CONCLUSION： Elenoside is a lignan with an action similar to that of purgative and prokinetics drugs. Elenoside, could be an alternative to cisapride in treatment of gastrointestinal diseases as well as a preventive therapy for the undesirable gastrointestinal effects produced by opioids used for mild to moderate pain.

关键词： Elenoside Gastrointestinal motility, Smail intestine preparation

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Dipole and generalized oscillator strength derived electronic properties of an endohedral hydrogen atom embedded in a Debye-Huckel plasma

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Matter and Radiation at Extremes 2018年第5期3卷 227-242页

作者： C.Martínez-Flores R.cabrera-trujillo Instituto de Ciencias Físicas Universidad Nacional Autonoma de MexicoAp.Postal 43-8CuernavacaMorelos62251Mexico

We report electronic properties of a hydrogen atom encaged by an endohedral cavity under the influence of a weak plasma interaction. Weimplement a finite-difference approach to solve the Schrodinger equation for a hydrogen atom embedded in an endohedral cavity modeled by theWoods-Saxon potential with well depth V0, inner radius R0, thickness D, and smooth parameter g. The plasma interaction is described by aDebye-Hu¨ckel screening potential that characterizes the plasma in terms of a Debye screening length lD. The electronic properties of theendohedral hydrogen atom are reported for selected endohedral cavity well depths, V0, and screening lengths, lD, that emulate differentconfinement and plasma conditions. We find that for low screening lengths, the endohedral cavity potential dominates over the plasma interaction by confining the electron within the cavity. For large screening lengths, a competition between both interactions is observed. We assessand report the photo-ionization cross section, dipole polarizability, mean excitation energy, and electronic stopping cross section as function of lD and V0. We find a decrease of the Generalized Oscillator Strength (GOS) when the final excitation is to an s state as the plasma screeninglength decreases. For a final excitation into a p state, we find an increase in the GOS as the endohedral cavity well-depth increases. For the caseof the electronic stopping cross section, we find that the plasma screening and endohedral cavity effects are larger in the low-to-intermediateprojectile energies for all potential well depths considered. Our results agree well to available theoretical and experimental data and are afirst step towards the understanding of dipole and generalized oscillator strength dependent properties of an atom in extreme conditions encagedby an endohedral cavity immersed in a plasma medium.

关键词： Oscillator strengths Debye-Huckel plasma Cavities Endohedral Energy loss Stopping power

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The role of radiotherapy in the treatment of oral cavity cancer

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Plastic and Aesthetic Research 2016年第1期3卷 158-166页

作者： joaquín j.cabrera-Rodríguez Department of Radiation Oncology University Hospital Infanta Cristina06080 BadajozSpain

Radiotherapy plays a critical role in the treatment of oral cavity squamous cell carcinoma as monotherapy in early stage cancer or combined with surgery and/or chemotherapy in advances *** developments in the imaging of cancer and radiation technology have allowed developing more precise delivery of treatment with recent data demonstrating improvement in survival and lessening of adverse toxics effects of *** review will focus in the recent advances and current state-of-the-art in radiation oncology both external beam radiotherapy and *** complexity of cancer treatments increases a close coordination between head-neck surgeons and radiation oncologist is needed due to a significant proportion of patients will be treated with combined modality therapy.

关键词： Radiotherapy intensity modulated radiation therapy high dose rate low dose rate head neck cancer brachytherapy

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三维叠前深度偏移实施及实例

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国外油气勘探 1994年第1期6卷 95-99页

作者： j.cabrera 黄丽陈有锋

利用并行巨型计算机做三维叠前深度偏移是一种行之有效的成像处理方法。在常规计算机上一整套输出数据要运行几年,而现在只要数周即可。因此,可以用输出数据的一个小子集进行重要速度模型的迭代,并且几天即可完成。盐下成像特别困难,因... 详细信息

利用并行巨型计算机做三维叠前深度偏移是一种行之有效的成像处理方法。在常规计算机上一整套输出数据要运行几年,而现在只要数周即可。因此,可以用输出数据的一个小子集进行重要速度模型的迭代,并且几天即可完成。盐下成像特别困难,因此需要进行三维叠前深度偏移。墨西哥湾盐丘底部三维成像实例展示了三维叠前深度偏移和偏移速度分析的优点,并着重说明了用二维叠前深度偏移进行复杂构造成像的危害。

关键词：偏移地震勘探

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Ubiquitination and PARylation cross-talk about immunity

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Molecular Plant 2021年第12期14卷 1976-1978页

作者： Marco trujillo Faculty of Biology Cell BiologyⅡUniversity of Freiburg79104 FreiburgGermany

Post-translational modifications(PTMs)allow organisms to quickly respond and acclimate to environmental *** attachment of ubiquitin and its different polymeric forms,act as signals that modulate most aspects of cellular *** is of key importance to maintain protein homeostasis during the immune response by coordinating the major degradation path-ways,namely proteasomal and vacuolar in plants(trujillo,2021).Poly(ADP-ribosyl)ation(PARylation),has also been linked to various stress responses and shows many commonalities to ubiquitination(Rissel and Peiter,2019).Yao et al.(2021)have now uncovered a link between these two PTMs.

关键词： maintain translational polymeric

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Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第9期20卷 2596-2597页

作者： Christopher j.O’Connell Matthew j.Robson Department of Genetics College of MedicineHarvard UniversityBostonMAUSA james L.Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of CincinnatiCincinnatiOHUSA Neuroscience Graduate Program College of MedicineUniversity of CincinnatiCincinnatiOHUSA

Traumatic brain injury(TBI)is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

关键词： sustained orange dynamic

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Interpolation of Ideal Measures by Abstract K and j Spaces

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1357-1374页

作者： Luz M.FERNNDEZ-cabrera Antón MARTíNEZ Sección Departamental de Matemática Aplicada Escuela de EstadísticaUniversidad Complutense de Madrid28040 MadridSpain Departamento de Matemática Aplicada I E.T.S.Ingenieros IndustrialesUniversidad de Vigo36200

We work with the abstract K and j interpolation method generated by a sequence lattice Г. We investigate the deviation of an interpolated operator from a given operator ideal by establishing formulae for the ideal measure of the interpolated operator in terms of the ideal measures of restrictions of the operator. Formulae are given in terms of the norms of the shift operators on Г.

关键词： real interpolation ideal measures operator ideals shift operators

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EXISTENCE OF SOLUTIONS OF NONLINEAR FRACTIONAL PANTOGRAPH EQUATIONS

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Acta Mathematica Scientia 2013年第3期33卷 712-720页

作者： K. BALACHANDRAN S. KIRUTHIKA j. trujillo Department of Mathematics Bharathiar University Universidad de La Laguna Departamento de Anlisis Matemtico38271 La Laguna Tenerife Spain

This article deals with the existence of solutions of nonlinear fractional pantograph equations. Such model can be considered suitable to be applied when the corresponding process occurs through strongly anomalous media. The results are obtained using fractional calculus and fixed point theorems. An example is provided to illustrate the main result obtained in this article.

关键词： Fractional differential equations pantograph equations fixed point theorems

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Note on controllability of linear fractional dynamical systems

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journal of Control and Decision 2016年第4期3卷 267-279页

作者： K.Balachandran M.Matar j.j.trujillo Department of Mathematics Bharathiar UniversityCoimbatoreIndia Department of Mathematics Al-Azhar University-GazaGazaPalestine Departamento de Analisis Matemático Universidad de La LaqunaTenerifeSpain

In this article,we obtain the solutions of some fractional differential systems with different orders using the inverse operator method and Mittag–Leffler ***,the controllability of time-invariant linear fractional s... 详细信息

关键词： Controllability fractional systems Mittag-Leffler function

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