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Research on arbuscular mycorrhizae in Cuba:a historical review and future perspectives

Studies in Fungi 2021年第1期6卷 240-262页

作者： Furrazola E Torres-Arias Y ojeda-quintana l Fors RO Rodríguez-Rodríguez R ley-Rivas JF Mena A González-González S Berbara Rll Queiroz MB Hamel C Goto BT Instituto de Ecología y Sistemática CITMA Carretera Varona 11835 e/Oriente y LinderoLa Havana 19CalabazarBoyerosLa HavanaCuba CUM Cumanayagua Universidad de Cienfuegos“Carlos R.Rodríguez”CienfuegosCuba Universidade Federal Rural do Rio de Janeiro Instituto de AgronomiaSeropedicaRJBrazil Instituto Nacional de Ciencias Agropecuarias(INCA) Gaveta Postal 1San Joséde las LajasMayabequeCuba Universidad de Temuco Chile Programa de Pós-graduação em Sistemática e Evolução CBUniversidade Federal do Rio Grande do NorteCampus Universitário59072-970NatalRNBrazil Quebec Research and Development Centre Agriculture and Agri-Food Canada2560 Hochelaga BlvdQuebec CityQCCanada G1V 2J3

This review presents the development of researches on arbuscular mycorrhizae(AM)conducted in Cuba,a tropical Caribbean island rich in *** key findings from this work are highlighted and presented as a stepping stone for future *** research has contributed to understand the diversity and functionality of AM in several tropical ecosystems,mainly evergreen forests,agroecosystems,sand dunes and *** were conducted in 10 out of 16 provinces reported 79 AM species,representing 25%of the known species *** researchers have a great deal of expertise in Glomeromycota taxonomy and have described 11 new species,of which six were not reported elsewhere in the ***,important studies conducted in Cuba have shed light on the mycotrophic plants,the role of AM in forest ecosystems,and their use in crop *** contribution of AM to ecosystem processes is a priority line of *** and multidisciplinary researches are necessary to define the role of AM symbioses and improve biogeochemical *** created Cuban Mycorrhizal Research Network will help to coordinate validation campaigns for various biofertilizers with training courses for Cuban farmers to disseminate the key results on *** the challenges for Cuban mycorrhizologists,molecular(genomic)techniques,stable isotopes and nuclear magnetic resonance should also be included as priority lines of research in the future.

关键词： Arbuscular mycorrhizal fungi diversity ecosystems mycorrhizal research symbiotic associations

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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

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liver dysfunction and SARS-CoV-2 infection

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World Journal of Gastroenterology 2021年第26期27卷 3951-3970页

作者： Abraham Edgar Gracia-Ramos Joel Omar Jaquez-quintana Raúl Contreras-Omaña Moises Auron Department of Internal Medicine General HospitalNational Medical Center"La Raza"Instituto Mexicano del Seguro SocialMexico City 02990Mexico Gastroenterology Service and Department of Internal Medicine Faculty of MedicineUniversity Hospital"Dr.JoséE.González"Universidad Autónoma de Nuevo LeónMonterrey 64460Mexico Centro de Estudio e Investigación en Enfermedades Hepáticas y Toxicológicas(CEIHET) Pachuca 42184Mexico Departments of Hospital Medicine and Pediatric Hospital Medicine Cleveland ClinicClevelandOH 44195United States

Severe acute respiratory syndrome coronavirus 2 infection is the cause of coronavirus disease 2019(COVID-19),which predominantly affects the respiratory system;it also causes systemic and multi-organic *** damage is among the main extrapulmonary ***-19-associated liver injury is defined as any liver damage occurring during the disease course and treatment of COVID-19 in patients with or without pre-existing liver disease,and occurs in approximately one in five *** liver test results have been associated with a more severe course of COVID-19 and other complications,including *** linking COVID-19 to liver injury are *** consideration should be made for patients with pre-existing liver disease,such as metabolic dysfunction-associated fatty liver disease,chronic liver disease due to viral or autoimmune disease,liver transplant carriers,or cirrhosis,given the risk for more severe *** manuscript summarizes the current lines of evidence on COVID-19-associated liver injury regarding pathophysiology,clinical significance,and management in both patients with or without preexisting liver disease,to facilitate clinicians’access to updated information and patient ***,we mention the ideas and recommendations to be considered for future research.

关键词： SARS-CoV-2 Coronavirus COVID-19 liver liver diseases liver failure liver injury Cirrhosis

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Ultrafine Grained HSlA Steels for Cold Forming

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Journal of Iron and Steel Research International 2010年第10期17卷 50-56页

作者： R González J O García M A Barbés M J quintana l F Verdeja J I Verdeja School of Engineering Panamerican University ETSIMO Oviedo University

The industrial level production of ultrafine grained （or ultrafine ferrite） ferrous alloys was investigated through three examples of steels that complied with the EN 10149-2 Euronorm and were produced by advanced con- trolled hot rolling techniques. The steel samples were tension tested and chemically analyzed, and the microstructure was evaluated through quantitative metallographic techniques to determine parameters such as yield stress, amount of microalloying elements, strain hardening coefficient, grain size, and grain size distribution. These steels were micro- alloyed with Ti, Nb, and Mn with ASTM grain sizes of approximately 13--15. The careful control of chemical com- position and deformation during production, giving a specific attention to the deformation sequences, austenite non- reerystallization temperatures and allotropic transformations during cooling, are indispensable to obtain steels with an adequate strain hardening coefficient that allows cold working operations such as bending, stretching or drawing.

关键词： ultrafine steel metallography strain hardening Euronorm

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Structural Ultrafine Grained Steels Obtained by Advanced Controlled Rolling

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Journal of Iron and Steel Research International 2013年第1期20卷 62-70页

作者： R González J O García M A Barbés M J quintana l F Verdeja J I Verdeja School of Engineering Panamerican UniversityMexico City 03920Mexico E T S I M O Oviedo UniversityOviedo 33004Spain

Steels with ultrafine grains （lower than 5 μm）, which usually known as ultrafine ferrite or ultrafine grained materials, are presently the object of intense research, because of the improvement in resistance and fracture toughness they may reach compared to conventional steels （with grain sizes above this value）. It is shown that the forenamed steels designated in the Euronorm EN 10149-2, which are manufactured by advanced techniques of controlled rolling and mainly used in automotive industry, have an ultrafine grain size in the range of 2.5 to 3.5 μm, and with elastic yield stresses higher than 400 MPa. Based on the Morrison-Miller criterion, it is shown that values of the strain-hardening coefficient lower than 0.08 would make the industrial application of these steels unfeasible.

关键词： ultrafine grained steel mechanical property manufacturability strain-hardening

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In silico analysis of lncRNA-miRNA-mRNA signatures related to Sorafenib effectiveness in liver cancer cells

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World Journal of Gastroenterology 2025年第3期31卷 84-102页

作者： Patricia de la Cruz-ojeda Ester Parras-Martínez Raquel Rey-Pérez Jordi Muntané Functional Genomics of Solid Tumors laboratory Centre de Recherche des CordeliersParis 75006France Department of Oncology Surgery Cell Therapy and Organ TransplantationInstitute of Biomedicine of SevilleVirgen del Rocio University HospitalSeville 41013Spain Biomedical Research Center for Hepatic and Digestive Diseases CIBERehdMadrid 28029Spain Department of Medical Physiology and Biophysics University of SevilleSeville 41009Spain

BACKGROUND Hepatocellular carcinoma(HCC)is the most common subtype of primary liver cancer with varied incidence and epidemiology *** is still a recommended treatment for a large proportion of patients with advanced *** patterns of treatment responsiveness have been identified in differentiated hepatoblastoma HepG2 cells and metastatic HCC SNU449 *** To define the long non-codingRNA-microRNA-mRNA(lncRNA-miRNA-mRNA)predicted signatures related to selected hallmarks of cancer(apoptosis,autophagy,cell stress,cell dedifferentiation and invasiveness)in RNAseq studies using Sorafenib-treated HepG2 and SNU449 *** available software analyses allowed us to establish the lncRNA-miRNA-mRNA regulatory axes following treatment in HepG2 and SNU449 *** HepG2 and SNU449 cells were treated with Sorafenib(10μmol/l)for 24 *** RNA,including small and long RNA,was extracted with a commercial miRNeasy *** was carried out for the identification of changes in lncRNA-miRNA-mRNA regulatory *** MAlAT,THAP9-AS1 and SNGH17 appeared to coordinately regulate miR-374b-3p and miR-769-5p that led to upregulation of SMAD7,TIRARP,TFAP4 and FAXDC2 in HepG2 ***12,EPB41 l4A-AS1,lINC01578,SNHG12 and GAS5 interacted with let-7b-3p,miR-195-5p and VEGFA in SNU449 *** axes MAlAT1/hsamir-374b-3p/SMAD7 and MAlAT1/hsa-mir-769-5p/TFAP4 were of high relevance for Sorafenib response in HepG2 cells,whereas PVT1/hsa-miR-195-5p/VEGFA was responsible for the differential response of SNU449 cells to Sorafenib *** Critical lncRNAs acting as sponges of miRNA were identified that regulated mRNA expression,whose proteins mainly increased the antitumor effectiveness of the treatment(SMAD7,TIRARP,TFAP4,FAXDC2 and ADRB2).However,the broad regulatory axis leading to increased VEGFA expression may be related to the side effect of Sorafenib in SNU449 cells.

关键词： Cell culture Hepatocellular carcinoma Non-coding RNA RNAseq Sorafenib

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Coherent States for the Two-Dimensional Dirac-Moshinsky Oscillator Coupled to an External Magnetic Field

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Communications in Theoretical Physics 2015年第3期63卷 271-274页

作者： D.ojeda-Guillen R.D.Mota V.D.Granados Escuela Superior de Física y Matemáticas Instituto Politécnico NacionalEd.9Unidad Profesional Adolfo López MateosC.P.07738México D.F.Mexico Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad CulhuacánInstituto Politécnico NacionalAv.Santa Ana No.1000Col.San Francisco CulhuacánDelegación CoyoacánC.P.04430Mexico D.F.Mexico

We show that the（2＋1）-dimensional Dirac-Moshinsky oscillator coupled to an externa/ magnetic field can be treated algebraically with the SU（1,1） group theory and its group *** use the su（1,1） irreducible representation theory to find the energy spectrum and the ***,with the su（1,1） group basis we construct the relativistic coherent states in a closed form for this problem.

关键词： lie algebras coherent states Dirac equation Dirac-Moshinsky oscillator

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Spontaneous twisting of a collapsed carbon nanotube

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Nano Research 2017年第6期10卷 1942-1949页

作者： Hamid Reza Barzegar Aiming Yan Sinisa Coh Eduardo Gracia-Espino Claudia ojeda-Aristizabal Gabriel Dunn Marvin l. Cohen Steven G. louie Thomas Wagberg Alex Zettl Department of Physics University of California Berkeley CA 94720 USA Department of Physics Umea University 90187 Umea Sweden Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory Berkeley CA 94720 USA

We study the collapsing and subsequent spontaneous twisting of a carbon nanotube by in situ transmission electron microscopy （TEM）. A custom-sized nanotube is first created in the microscope by selectively extracting shells from a parent multi-walled tube. The few-walled, large-diameter daughter nanotube is driven to collapse via mechanical stimulation, after which the ribbon-like collapsed tube spontaneously twists along its long axis. In situ diffraction experiments fully characterize the uncollapsed and collapsed tubes. The experimental observations and associated theoretical analysis indicate that the origin of the twisting is compressive strain.

关键词： multi-walled carbonnanotube collapsed carbon nanotube in situ TEM electron diffraction twisting graphene nanoribbons

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Spin Number Coherent States and the Problem of Two Coupled Oscillators

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Communications in Theoretical Physics 2015年第7期64卷 34-38页

作者： D.ojeda-Guillén R.D.Mota V.D.Granados Escuela Superior de Fisica y Matemáticas Instituto Politécnico Nacional Ed. 9 Unidad Profesional Adolfo López Mateos Escuela Superior de Ingenieria Mecánica y Eléctrica Unidad Culhuacán Instituto Politécnico Nacional

From the definition of the standard Perelomov coherent states we introduce the Perelomov number coherent states for any su(2) lie algebra. With the displacement operator we apply a similarity transformation to the su(2)generators and construct a new set of operators which also close the su(2) lie algebra, being the Perelomov number coherent states the new basis for its unitary irreducible representation. We apply our results to obtain the energy spectrum, the eigenstates and the partition function of two coupled oscillators. We show that the eigenstates of two coupled oscillators are the SU(2) Perelomov number coherent states of the two-dimensional harmonic oscillator with an appropriate choice of the coherent state parameters.

关键词： coherent states lie algebras coupled oscillators

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Hybrids of gold nanoparticles and oligo(p-phenyleneethynylene)s end-functionalized with alkynylruthenium groups:Outstanding two-photon absorption in the second biological window

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Nano Research 2020年第10期13卷 2755-2762页

作者： Cristóbal quintana Mahbod Morshedi Jun Du Joseph P.l.Morrall Jan K.Zaręba Marek Samoc Marie P.Cifuentes Mark G.Humphrey I Research School of Chemistry Australian National UnriversityCanberraACT 2601Australia Advanced Materials Engineering and Modelling Group Wroclaw University of Science and TechnologyWroclaw 50370Poland

Oligo(p-phenyleneethynylene)s(OPEs)end-capped with(alkynyl)bis(diphosphine)ruthenium and thiol/thiolate groups stabilize ca.2 nm diameter gold nanoparticles(AuNPs).The morphology,elemental composition and stability of the resultant organometallic OPE/AuNP hybrid materials have been defined using a combination of molecular-and nano-material chacterization *** hybrids display long-term stability in solution(more than a month),good solubility in organic solvents,reversible rutheniumcentered oxidation,and transparency beyond 800 nm,and possess very strong nonlinear absorption activity at the first biological window,and unprecedented two-photon absorption activity in the second biological window(σ2 up to 38,000 GM at 1,050 nm).

关键词： gold nanoparticles inorganic materials metal alkynyl complexes nonlinear optics organometallics

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