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Advances in Materials Physics and Chemistry 2012年第4期2卷 92-95页

作者： Y Elvia Díaz Valdés Concepción Mejía García ana maría paniagua mercado Arturo Méndez Sánchez Departamento de Física Escuela Superior de Física y Matemáticas – IPN Edif. 9 UPALM Col. San Pedro Zacatenco Deleg. GAM México 07737 México

Actually recent investigation in developing semiconducting-superconducting composites based in CdS and Bi-based superconductors has attracted interest in processing thin superconducting films. In this work are reported Bi-Pb-Sr-Ca-Cu-O (BPSCCO) thin films grown on MgO substrates by spray pyrolysis technique from a solution containing Bi(NO3)3, Pb(NO3)2, Sr(NO3)2, Ca(NO3)2 and Cu(NO3)2, with a subsequent solid state reaction for growing the Bi-based superconducting phases. Annealed films were characterized by X-ray diffraction, atomic absorption spectroscopy and resistance measurements. Interdependence between Pb content, annealing time and temperature, in the formation of superconducting phases was studied applying a fractional factorial design 3III4-2. Interrelation between Pb content, ta and Ta exists. The presence of Pb is necessary to stabilize the high-Tc phase but its content depends on the annealing conditions.

关键词： Superconductivity BPSCCO Superconducting Films Spray Pyrolysis Deposition Pb Content Annealing Conditions Experimental Design

Periodontal disease:A silent factor in the development and progression of diabetic retinopathy

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World Journal of Diabetes 2024年第8期15卷 1672-1676页

作者： Sarah Monserrat Lomelímartínez Irán Cortés Trujillo Melissa martínez Nieto ana Esther mercado González Department of Medical and Life Sciences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlán 47810Mexico Master of Public Health Department of Wellbeing and SustainableCentro Universitario del NorteUniversidad de GuadalajaraColotlán 46200Mexico Periodontics Program Department of Integrated Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico Antiguo Hospital Civil de Guadalajara“Fray Antonio Alcalde” Guadalajara 44280Mexico

The global increase in the prevalence of type 2 diabetes mellitus(T2DM)and its complications presents significant challenges to public ***,periodontal disease(PD)was recognized as a factor that is likely to influence the progression of T2DM and its complications due to its potential to exacerbate systemic inflammation and oxidative *** this editorial,we comment on the article published by Thazhe Poyil et al in the very recent issue of the World Journal of Diabetes in 2024,which investigated the correlation between PD and diabetic retinopathy(DR)in T2DM patients,with emphasis on the association between periodontal swollen surface area,glycated hemoglobin(HbA1c),interleukin-6(IL-6),and lipoprotein(a).The findings by Thazhe Poyil et al are significant as they demonstrate a strong link between PD and DR in T2DM *** correlation highlights the importance of addressing periodontal health in diabetes management to potentially reduce the risk and severity of DR,a complication of *** integration of periodontal evaluation and treatment into diabetes care protocols may lead to improved glycemic control and better overall outcomes for T2DM patients.A few studies have established an interconnection between PD and diabetic complication,specifically DR,in T2DM patients,which we aim to highlight in this *** was placed on the different mechanisms that suggest a bidirectional relationship between PD and T2DM,where the presence of periodontal inflammation negatively influenced glycemic control and contributed to the development and progression of DR through shared inflammatory and vascular *** article highlights the importance of collaboration amongst diabetes specialists,ophthalmologists,periodontists,and public health professionals to advance the prevention,early detection,and treatment of PD and *** will improve the health and quality of life of T2DM ***,the editorial highlights the need for further re

关键词： Type 2 diabetes mellitus Periodontal disease Periodontitis Diabetic retinopathy Editorial

CRISPR/Cas9 editing of the polygalacturonase FaPG1 gene improves strawberry fruit firmness

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Horticulture Research 2023年第3期10卷 201-210页

作者： Gloria López-Casado Cristina Sánchez-Raya Pablo D.Ric-Varas Candelas paniagua Rosario Blanco-Portales Juan Muñoz-Blanco Sara Pose Antonio J.Matas Jose A.mercado Departamento de Botánica y Fisiología Vegetal Instituto de Hortofruticultura Subtropical y Mediterránea‘La Mayora’(IHSM-UMA-CSIC)Universidad de Málaga29071 MálagaSpain Departamento de Bioquímica y Biología Molecular Universidad de Córdoba14071CórdobaSpain

Firmness is one of the most important fruit quality traits in *** postharvest shelf life of this soft fruit is highly limited by the loss of firmness,where cell wall disassembly plays an important *** studies demonstrated that the polygalacturonase FaPG1 has a key role in remodelling pectins during strawberry *** this study,FaPG1 knockout strawberry plants have been generated using the CRISPR/Cas9 system delivered via Agrobacterium *** independent lines,cv.“Chandler”,were obtained,and all of them were successfully edited as determined by PCR amplification and T7 endonuclease *** targeted mutagenesis insertion and deletion rates were analyzed using targeted deep *** percentage of edited sequences varied from 47%up to almost 100%,being higher than 95%for seven of the selected *** analyses showed that 7 out of the eight lines analyzed produced fruits significantly firmer than the control,ranging from 33 to 70%increase in *** was a positive relationship between the degree of FaPG1 editing and the rise in fruit *** changes were observed in other fruit quality traits,such as colour,soluble solids,titratable acidity or anthocyanin *** fruits showed a reduced softening rate during postharvest,displayed a reduced transpirational water loss,and were less damaged by Botrytis cinerea *** analysis of four potential off-target sites revealed no mutation *** conclusion,editing the FaPG1 gene using the CRISPR/Cas9 system is an efficient method for improving strawberry fruit firmness and shelf life.

关键词： fir straw PG1

Unusual clinical presentation of oral pyogenic granuloma with severe alveolar bone loss:A case report and review of literature

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World Journal of Clinical Cases 2023年第16期11卷 3907-3914页

作者： Sarah Monserrat Lomelímartínez Dennisse Bocanegra Morando ana Esther mercado González Juan Ramón Gómez Sandoval Department of Medical and Life Sciences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlán 47810Mexico Master of Public Health Department of Wellbeing and Sustainable DevelopmentCentro Universitario del NorteUniversidad de GuadalajaraColotlán 46200Mexico Periodontics Program Department of Integrated Dentistry ClinicsCentro Universitario de Ciencias de la SaludGuadalajara 44340Mexico Antiguo Hospital Civil de Guadalajara“Fray Antonio Alcalde” Guadalajara 44280Mexico Research Institute of Dentistry Department of Integrated Dentistry ClinicsCentro Universitario de Ciencias de la SaludUniversidad de GuadalajaraGuadalajara 44340Mexico

BACKGROUND Pyogenic granuloma(PG)is a localized,reddish and vascularized hyperplastic lesion of the connective tissue which occurs in the oral *** most cases,the presence of this lesion does not show alveolar bone *** pathology is diagnosed clinically with some ***,the diagnosis and treatment are usually corroborated with histopathological *** SUMmarY Three clinical cases of PG associated with bone loss were described in this *** three patients presented tumor-like growth which bled on touch,and were associated with local irritant *** showed bone *** cases were treated with conservative surgical *** scarring was satisfactory,and there was no case of *** diagnoses were based on clinical findings,and were confirmed *** The occurrence of oral PG with bone loss is ***,clinical and radiographic evaluations are important for the diagnosis.

关键词： Hyperplastic lesion Pyogenic granuloma Alveolar bone loss Case report

Increasing the Burned Time and Mechanical Properties with New Mix As Flame Retardant Based in Hexametaphosphate of Sodium and Borax in Textile 100% Acrylic Fabrics

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Advances in Materials Physics and Chemistry 2012年第4期2卷 99-101页

作者： M. Olvera- Gracia L. mercado- Velazquez A.M. paniagua- mercado Instituto Politécnico Nacional ESFM - Departamento de Ciencia de Materiales Av. IPN Ed. 9 U.P.A.L.M. 07738 México D.F. México. Instituto Politécnico Nacional ESIT – Sección de estudios de Posgrado e investigación Av. IPN Ed. 8 U.P.A.L.M. 07738 México D.F. México.

It has been worked with textile fabrics of Acrylic 100 % , that have as final use the Tapestry, this fabrics have been impregnated with a two products flame retardant: Commercial Retardant, which is formed by a combination of a resin polymeric and acid phosphoric and Borax (Na2B4O5(OH)4.8H2O) with Sodium Hexametaphosphate (Na16P14O43). These Retardants?? has the advantage of the fact that it can be applied to the substrates mixed with water in the relation 1:1, 1:2 or pure. In order to reduce the flammability, Textile fabrics are coated with flame retardants. The flame retardant capabilities, mechanical properties and structural characteristics of the textile fabrics before and after the use of these products were investigated throughout the special textile methods for inflammability and mechanical resistibility. After the use of the flame retardants the mechanical properties of the fabrics were improved or at least remained the same as compared to fabrics without any treatment. The use of Borax / Sodium Hexametaphosphate /Water results in the essential increase of combustion retardation time about 2 minutes as compared with 8 seconds for untreated fabrics.

关键词： Acrylic Borax Flame Retardants Sodium Hexametametaphosphate Textile Fabrics

Development And Characterization of Ultra Low Cement Castable Cordierites by Thixotropic Properties Mixtures

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Advances in Materials Physics and Chemistry 2012年第4期2卷 96-98页

作者： ana M. paniagua-mercado Arturo Méndez-Sánchez Elvia Díaz Valdés Concepción Mejía García Depto. de Física Escuela Superior de Física y Matemáticas Instituto Politécnico Nacional Col. Lindavista CP 03778 México D. F. México

The main target in this investigation was to take advantage of the reology properties of the tixotropic mixes in Ultra Low Cement Castables (ULCC). The cordierite phase in refractory mix can be obtained using raw materials with magnesium oxide in its composition, such as, Mg(OH)2 or H2Mg3(SiO3)4 (Talc mineral), with a content of? 63.5% SiO2, 31.7% MgO and 4.8% H2O. In this investigation, as magnesium source, a commercial calcined magnesite with 90% MgO was used.? This mineral was selected instead of Talc mineral, because this last contains more impurities in its composition that tend to form more amounts of liquid phases with low fusion points. For this work two different ULCC mixes were designed. These were fired at 1260 oC, the cordierite phase was quantified in each mix.

关键词： Reology Thixotropic Mixtures Ultra Low Cement Castables Cordierite

Effect of the filling season on aquatic plants in Mediterranean temporary ponds

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Journal of Plant Ecology 2018年第3期11卷 502-510页

作者： Rocío Fernández-Zamudio Pablo García-Murillo Carmen Díaz-paniagua Doñana Biological Station-CSIC Avda.Américo Vespucio s/n41092 SevilleSpain Department of Plant Biology and Ecology Faculty of PharmacyUniversity of SevilleSevilleSpain

Aims Pond environmental conditions may differ among years with regards to the season in which ponds begin to *** experimen-tally evaluated how seedling emergence,plant growth and phe-nology differed among years in which filling occurred in winter,autumn or *** We collected sediments from a natural temporary pond and located them in *** were placed in a climatic chamber that simulated annual variation in field environmental temperatures and light *** were assigned to one of three treat-ments,which differed in the date on which they were filled with water(autumn,winter and spring).We counted the number of seed-lings of different species emerged and recorded data about the pres-ence of flowers,seeds or spores every *** experiment was finished in June,when we harvested the plants and estimated their *** Findings In most species,seedling emergences were primarily related to time after filling,and thus synchronized their life cycles with the unpre-dictably timed wet phase of the *** filling resulted in the highest numbers of seeds/***,winter filling pro-moted plant growth the *** the spring filling treatment,more terrestrial plant seedlings emerged and fewer seeds/spores were *** ponds are flooded earlier,plants may produce a higher number of ***,in years when inundation is delayed to spring and hydroperiods are short,seedling emergence deplete the seed bank and there is little to no seed production,while terrestrial monocots are able to colonize pond basin.

关键词： Aquatic plants temporary ponds seed bank seedlings germination

Influence of Humidity on Yield Stress Determination by Slump Test of Slip-Prone Clayey Soils and Their Relation with the Chemical Properties

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Advances in Materials Physics and Chemistry 2012年第4期2卷 102-105页

作者： Arturo F. Méndez-Sánchez ana M. paniagua-mercado Karen E. Nieto-Zepeda Leonor Pérez-Trejo Elvia Diaz Valdés Concepción Mejía García Escuela Superior de Física y Matemáticas Instituto Politécnico Nacional Edif. 9 Unidad Profesional Adolfo López Mateos Col. Lindavista C. P. 07738 México D. F. México.

In this work, the yield stress evaluation as a function of water content for slip-prone clayey soils is studied in order to understand how yield stress decreases as water content increases, and their relation with the chemical properties. The clayey soil samples were taken from the region of Teziutlán-Puebla-Mexico. Yield stress was calculated using the slump test in cylindrical geometry. Results show three zones. The first one shows an exponential decrement on yield stress due to lower water content in accord with clayey soils with high content of illita, followed by a second region where yield stress decreases dramatically at a certain critical water concentration, and the third one where yield stress dependence is not well-defined since the clayey soil flow is seen. Finally, it is discussed how yield stress variation due to the water increment influences the landslide risk increment.

关键词： Clayey Soil Yield Stress Slump Test Microstructure Illita

Synthesis of Aluminum-doped Zinc Oxide Nanowires Hydrothermally Grown on Plastic Substrate

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Advances in Materials Physics and Chemistry 2012年第4期2卷 56-59页

作者： Concepción Mejía García Elvia Díaz Valdés ana Ma. paniagua mercado Arturo F. Méndez Sánchez José A. Andraca Adame Velumani Subramaniam Josué Romero Ibarra Centro de Nanociencias y Micro y Nanotecnologías del IPN UPALM Luis Enrique Erro S/N México 07738 México Departamento de Física Escuela Superior de Física y Matemáticas – IPN Edif. 9 UPALM Col. San Pedro Zacatenco Deleg. GAM México 07738 México Depto. de Ing. Eléctrica Sección de Estado Sólido Av. IPN No. 2508 Col. San Pedro Zacatenco México 07360 México

We report the synthesis of undoped ZnO and Al-doped ZnO (ZnO:Al) nanowires grown using a two-step process: (a) preparation of the seed layer, and (b) growth of the nanostructures. In the first step,? 10 mM solutions of zinc acetate dihydrate and 1-propanol were spin coated on polyethylene terephthalate? (PET) substrate at 2000 rpm by 30 s. Vertical nanowires were then grown by dipping the substrates in an equimolar solution of zinc nitrate hexahydrate and hexamethylenetetramine. As doping source, aluminum nitrate nonahydrate powders were added in the solution. In the solutions, Al doping concentrations were established as 0.5 At %, 1.0 At %, 2.0 At % and 3.0 At %, respectively. The hydrothermal process were carried out with a commercially microwave at 140 W power setting. The nanowires were characterized optically and morphologically. XRD patterns show the presence of ZnO, Zn(OH)2 and Zn6Al2O9. Scanning electron microscopy analysis showed that the size of ZnO nanowires was 50 nm in diameter. The undoped ZnO and ZnO:Al nanowires bandgap energy was obtained from optical transmission spectra.

关键词： Nanowires ZnO ZnO:Al Nanowires Spin Coating Hydrothermal Process

Mesenchymal stem cell-derived exosomes promote neurogenesis and cognitive function recovery in a mouse model of Alzheimer’s disease

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Neural Regeneration Research 2019年第9期14卷 1626-1634页

作者： Edwin E. Reza-Zaldivar Mercedes A. Hernández-Sapiéns Yanet K. Gutiérrez-mercado Sergio Sandoval-ávila Ulises Gomez-Pinedo ana L. Márquez-Aguirre Estefanía Vázquez-Méndez Eduardo Padilla-Camberos Alejandro A. Canales-Aguirre Unidad de Evaluation Preclinica Unidad de Biotecnologia Medica y FarmaceuticaCentro de Investigation y Asistencia en Tecnologia y Diseno del Estado de JaliscoGuadalajaraMexico Regenerative Medicine Unit Neuroscience InstituteDepartment of Neurosurgery and NeurologyIdlSSC Health Research Institute of the Hospital Clinico San CarlosMadridSpain

Studies have shown that mesenchymal stem cell-derived exosomes can enhance neural plasticity and improve cognitive *** purpose of this study was to investigate the effects of mesenchymal stem cell-derived exosomes on neurogenesis and cognitive capacity in a mouse model of Alzheimer’s ***’s disease mouse models were established by injection of beta amyloid 1?42 aggregates into dentate gyrus *** water maze and novel object recognition tests were performed to evaluate mouse cognitive deficits at 14 and 28 days after ***,neurogenesis in the subventricular zone was determined by immunofluorescence using doublecortin and PSA-NCAM *** showed that mesenchymal stem cells-derived exosomes stimulated neurogenesis in the subventricular zone and alleviated beta amyloid 1?42-induced cognitive impairment,and these effects are similar to those shown in the mesenchymal stem *** findings provide evidence to validate the possibility of developing cell-free therapeutic strategies for Alzheimer’s *** procedures and experiments were approved by Institutional Animal Care and Use Committee(CICUAL)(approval *** 2016-011)on April 25,2016.

关键词： Alzheimer’s disease neurodegenerative disease cognitive impairment memory Alzheimer’s disease mouse model mesenchymal stem cell exosomes neurogenesis cognitive improvement cell-free therapy neural regeneration