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机械球磨制备Ni_2FeSb合金的烧结动力学（英文）

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Transactions of Nonferrous Metals Society of China 2016年第8期26卷 2126-2135页

作者： F.ALVARADO-HERNáNDEZ O.JIMéNEZ G.GONZALEZ-CASTANEDA V.BALTAZAR-HERNáNDEZ J.CABEZAS-VILLA M.ALBITER H.VERGARA-HERNáNDEZ L.OLMOS Unidad Académica de Ingeniería I Universidad Autónoma de ZacatecasJardín Juárez 147 Centro Histórico Zacatecas Zacatecas C. P. 98000 México Departamento de Ingeniería de Proyectos CUCEI Universidad de GuadalajaraBlvd. Marcelino García Barragán 1421 Olímpica Guadalajara Jalisco C. P. 44430 Mexico INICIT Universidad Michoacana de San Nicolás de HidalgoFco. J. Mujica S/N C.U. Morelia Michoacán C. P. 58060 México División de Estudios de Posgrado e Investigación TecNM/Instituto Tecnológico de MoreliaAv. Tecnológico # 1500 Colonia Lomas de Santiaguito Morelia Michoacán C. P. 58120 México

采用粉末冶金工艺制备Ni2FeSb三元形状记忆合金。利用膨胀实验研究合金的烧结动力学；采用XRD和SEM分别考察粉末样品和烧结样品的显微组织和形貌；测定烧结样品表面的显微硬度。结果表明：研磨时间对粉末样品的形状、晶粒尺寸和晶体结... 详细信息

采用粉末冶金工艺制备Ni2FeSb三元形状记忆合金。利用膨胀实验研究合金的烧结动力学；采用XRD和SEM分别考察粉末样品和烧结样品的显微组织和形貌；测定烧结样品表面的显微硬度。结果表明：研磨时间对粉末样品的形状、晶粒尺寸和晶体结构的均匀性具有显著影响。经较长时间研磨的样品具有较高的相对密度和较均匀的元素分布，且为L21和马氏体相，这些性能使合金具有形状记忆功能。在温度为750~1273K条件下，合金的激活能为109~283kJ/mol，这表明烧结过程主要由体积扩散控制。增加研磨时间和加热速率，合金的显微硬度得到提高。

关键词： Ni基形状记忆合金机械球磨固态烧结显微硬度

Betanidin significantly reduces blood glucose levels in BALB/c mice fed with an atherogenic diet

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Natural Products and Bioprospecting 2012年第4期2卷 154-155页

作者： Agustin LUGO-RADILLO Ivan DELGADO-ENCISO Elpidio PEÑA-BELTRÁN Instituto Nacional de Geriatría Periférico Sur 2767San Jerónimo LídiceMagdalena Contreras10200 México D.F.México Facultad de Medicina Universidad de ColimaAv.Universidad 333Colonia Las Víboras28040 ColimaColimaMéxico Facultad de Ciencias Biológicas y Agropecuarias Universidad de Colima.Carr.Colima-Manzanillo km 4028100 TecománColimaMéxico

Six weeks BALB/c mice were fed with an atherogenic diet for 24 weeks and purified water ad *** experimental group was given betanidin,orally,during the last 40 days of the experiment at a dose of 9.6 mg per mouse per *** controls were fed with standard rodent chow *** was measured at the end of the experiment,after overnight *** group treated with betanidin presented a highly significant reduction of 50.94%compared to positive *** conclude that betanidin reduces glycemia in BALB/c mice by an unidentified mechanism.

关键词： betalains betanidin blood glucose hypoglycemiant

粉末冶金法制备Ti6Al4V/20CoCrMo与多孔Ti6Al4V双层生物医用材料的设计与表征

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Transactions of Nonferrous Metals Society of China 2021年第1期31卷 178-192页

作者： E.MIHALCEA H.J.VERGARA-HERNÁNDEZ O.JIMENEZ L.OLMOS J.CHÁVEZ D.ARTEAGA División de Estudios de Posgrado e Investigación Tecnológico Nacional de México/ITMoreliaAv.Tecnológico#1500Colonia Lomas de SantiaguitoMoreliaC.P.58120México Universidad de Guadalajara DIPJoséGuadalupe Zuno#48Los BelenesZapopanC.P.45100México INICIT Universidad Michoacana de San Nicolás de HidalgoFco.J.Mujica S/NMoreliaC.P.58060México Departamento de Ingeniería Mecánica Eléctrica CUCEIUniversidad de GuadalajaraBlvd.Marcelino García Barragán 1421OlímpicaC.P.44430 GuadalajaraJaliscoMéxico Centro de Geociencias Universidad Nacional Autónoma de MéxicoBlvd.Juriquilla No.3001Querétaro 76230México

制备Ti6Al4V/20CoCrMo与多孔Ti6Al4V生物医用双层复合材料。采用传统粉末冶金技术,以半固态烧结为固结步骤,制备具有致密Ti6Al4V/20CoCrMo表层和多孔Ti6Al4V底层的双层样品,以更好地模拟天然骨。采用膨胀法研究双层试样的致密化行为,通... 详细信息

制备Ti6Al4V/20CoCrMo与多孔Ti6Al4V生物医用双层复合材料。采用传统粉末冶金技术,以半固态烧结为固结步骤,制备具有致密Ti6Al4V/20CoCrMo表层和多孔Ti6Al4V底层的双层样品,以更好地模拟天然骨。采用膨胀法研究双层试样的致密化行为,通过扫描电镜(SEM)和显微计算机断层成像(CMT)观察其显微组织,并分别通过压缩试验和动电位试验评价其力学性能和耐腐蚀性能。结果表明,在界面对致密化无负面影响的情况下,可得到无裂纹的双层样品。多孔层的渗透率值在较低的人体骨骼的渗透率范围内。样品的压缩特性由Ti6Al4V多孔层决定。此外,Ti6Al4V/20CoCrMo的耐腐蚀性能优于Ti6Al4V的耐腐蚀性能,提高双层样品的耐腐蚀性。研究粉末冶金法制备具有致密Ti6Al4V/20CoCrMo表层和多孔Ti6Al4V底层的双层结构材料,有助于生产定制化、具有良好磨损性能和体内寿命的植入物。

关键词：双层结构复合材料孔隙率烧结渗透率压缩行为腐蚀

Update on vascular endothelial Ca^(2+) signalling:A tale of ion channels,pumps and transporters

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World Journal of Biological Chemistry 2012年第7期3卷 127-158页

作者： Francesco Moccia Roberto Berra-Romani Franco Tanzi Department of Biology and Biotechnologies "Lazzaro Spallanzani" Laboratory of PhysiologyUniversity of PaviaVia Forlanini 627100 PaviaItaly Department of Biomedicine School of Medicine Benemérita Universidad Autónoma de Puebla3 Sur 2702Colonia Volcanes Puebla 72410México

A monolayer of endothelial cells (ECs) lines the lumen of blood vessels and forms a multifunctional transducing organ that mediates a plethora of cardiovascular processes. The activation of ECs from as state of quiescence is, therefore, regarded among the early events leading to the onset and progression of potentially lethal diseases, such as hypertension, myocardial infarction, brain stroke, and tumor. Intracellular Ca2+ signals have long been know to play a central role in the complex network of signaling pathways regulating the endothelial functions. Notably, recent work has outlined how any change in the pattern of expression of endothelial channels, transporters and pumps involved in the modulation of intracellular Ca2+ levels may dramatically affect whole body homeostasis. Vascular ECs may react to both mechanical and chemical stimuli by generating a variety of intracellular Ca2+ signals, ranging from brief, localized Ca2+ pulses to prolonged Ca2+ oscillations engulfing the whole cytoplasm. The well-defined spatiotemporal profile of the subcellular Ca2+ signals elicited in ECs by specific extracellular inputs depends on the interaction between Ca2+ releasing channels, which arelocated both on the plasma membrane and in a number of intracellular organelles, and Ca2+ removing systems. The present article aims to summarize both the past and recent literature in the field to provide a clear-cut picture of our current knowledge on the molecular nature and the role played by the components of the Ca2+ machinery in vascular ECs under both physiological and pathological conditions.

关键词： Endothelial cells Ca2+ signalling Plasma membrane Endoplasmic reticulum Intracellular Ca2+ release Ca2+ entry Ca2+ removal Ca2+ oscillations

Synthesis and Characterization of TiO2 Nanoreservoirs Supported with Platinum II and Sodium Bicarbonate Solution

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材料科学与工程（中英文A版） 2015年第1期5卷 100-108页

作者： Jose Albino Moreno Rodriguez Genaro Carmona Gutierrez Marco-Antonio Gonzalez Coronell Efrain Rubio Rosas Lilian-Aurora Moreno Rodrlguez Fernando Moreno Rodriguez Chemistry Department Faculty of Chemistry Science Academic Entailment Center and Technology Transfer Physics Institute C. U. Colonia San Manuel. Puebla Puebla. C. P. 72570. Mexico Tapia's Chiautla Hospital S/N C.P. Puebla 74730. Mexico

In the past 10 years, the nanoreservoirs to based on TiO2 have taken the lead to develop new and better ways to control and possible "removal" of diseases that have bewildered mankind since its existence. In seeking to contribute to these expectations, at this early stage we synthesized nanoreservoirs of TiO2 with sodium bicarbonate solution to 15% (NaHCO3-15/TiO2), with salt of platinum(II) to 0.1% (Pt-0.1/TiO2) and with the NaHCO3 15% and the platinum(II) 0.1% "in situ" (Pt-0.1-NaHCO3-15/TiO2) by sol-gel. We show that TiO2 and Pt-0.1/TiO2 nanoreservoirs are amorphous. While the NaHCO3-15/TiO2 and the Pt-0.1-NaHCO3-15/TiO2 nanoreservoirs are crystalline. The NaHCO3-15/TiO2 and Pt-0.1-NaCO3-15/TiO2 nanoreservoirs are crystalline because to transformation of the sodium bicarbonate (NaHCO3) to trona phase. The trona phase increases the average particle size of the Pt-0.1-NaCO3-15/TiO2 nanoreservoirs of 180 nm to 130 nm (NaHCO3-15/TiO2). The nanoreservoirs doped with platinum decreases the particle size to 50 nm (Pt-0.1/TiO2).

关键词：二氧化钛碳酸氢钠溶液合成 TiO2 二代白金表征

Trichoderma *** Bacillus *** growth promoters in maize(Zea mays L.)

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Phyton-International Journal of Experimental Botany 2019年第1期88卷 37-46页

作者： López-Valenzuela BE Armenta-Bojórquez AD Hernández-Verdugo S Apodaca-Sánchez MA Samaniego-Gaxiola JA Valdez-Ortiz A Universidad Autónoma de Sinaloa.Facultad de Agricultura del Valle del Fuerte.Avenida Japaraqui y Calle 16 s/n Juan JoséRíosSinaloaC.P 81110México Universidad Autónoma de Baja California.Instituto de Ciencias Agrícolas.Carretera a Delta s/n Ejido Nuevo leónBaja CaliforniaC.P.21705México Instituto Politécnico Nacional.Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa.Blvd.Juan de Dios Bátiz Paredes#250 Colonia San JoachinGuasaveSinaloaC.P.81101México Universidad Autónoma de Sinaloa Facultad de Agronomía.Km.17.5Carretera Culiacán-El DoradoCuliacán RosalesSinaloaC.P.80000México Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias Campo Experimental La LagunaBlvd.JoséSantos Valdez 1200 Pte.MatamorosCoahuilaC.P.27440México Universidad Autónoma de Sinaloa Facultad de Ciencias Químico Biológicas.Calzada de las Américas y Calle Universitarioss/n.Ciudad UniversitariaCuliacánSinaloaC.P.80013México

Microbes that are beneficial to plants are used to enhance the crop growth,yield and are alternatives to chemical *** and Bacillus are the predominant plant growth-promoting fungi and *** objective of this study was select,characterize,and evaluate isolates of Trichoderma *** Bacillus *** from the northern region of Sinaloa,Mexico,and assess their effect on growth promotion in maize(Zea mays L.).In greenhouse conditions,four Trichoderma isolates and twenty Bacillus isolates,as well as two controls,were tested in a completely randomized design with three *** selected the two best strains of Trichoderma and Bacillus:TB=Trichoderma asperellum,TF=Trichoderma virens,B14=Bacillus cereus sensu lato and B17=Bacillus cereus,which were evaluated in the field in a completely randomized blocks in factorial arrangement design with three replicates applying different rates of nitrogen fertilizer(0,150 kg N/ha,and 300 kg N/ha).Treatments 5(B17=***)and 11(TF=***)both fertilized with 150 kg N/ha showed similar yields and they did not reveal significant differences from the treatments fertilized with 300 kg N/*** indicated that treatment 5(B17=*** with 150 kg N/ha)and treatment 11(TF=*** with 150 kg N/ha)were efficient as growth promoters,by not showing significant differences in root volume and dry weight of *** results indicated a reduction of 50% in the rate of nitrogen to fertilizer required for maize(Zea mays L.)*** microorganisms Trichoderma and Bacillus could be an alternative to reduce the use of chemical fertilizers in maize.

关键词： Trichoderma Bacillus Native strains Biofertilizers

Cellular Forms in Cultivation in Suspension of Bougainvillea glabra Choisy Variety Surprise

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Journal of Agricultural Science and Technology(A) 2018年第4期8卷 203-211页

作者： Christian Marely Rodriguez-Salazar José Roman-Reynosa Sandra Victoria Avila-Reyes Franklin Loring-Younce Antonio Ruperto Jiménez-Aparicio Silvia Evangelista-Lozano Centro de Desarrollo de Productos Bióticos del Instituto Politécnico Nacional (CEPROBI-IPN) Carretera Yautepec-JojutlaKm 6calle CEPROBI no. 8Colonia San IsidroC.P. 62731YautepecMorelosMéxico Tecnológico de Zacatepec del Instituto Nacional de México Calzada Tecnológico 27Col. Plan de AyalaC.P. 62780Zacatepec de HidalgoMorelosMéxico CONACyT-Instituto Politécnico Nacional (CEPROBI-IPN) Carretera Yautepec-JojutlaKm 6calle CEPROBI No. 8Colonia San IsidroC.P. 62731YautepecMorelosMéxico School of Food Science Washington State UniversityPullmanWA 99164-6376USA

The objective of this work was to describe the predominant cell forms in the phases of growth kinetics in a suspension culture of the Bougainvillea glabra Choisy variety *** in suspension with Murashige and Skoog(MS)basal culture medium were supplemented with six different concentrations and combinations of vegetable growth regulator(VGR)of type auxin(2,4-D and NAA)and cytokinin(BAP)(0.2-5.3 mg/L)and a *** callus was obtained from leaf explants ex vitro to in vitro culture in solid MS medium using PhytagelTM as gelling agent to 2.2 g/L.A portion of callus(1.0 g)was used as cellular inoculum and grown under controlled conditions(50 mL,120 rpm,25°C and luminous intensity of 48μmol m2/s).The best treatment with significant differences(p≤0.05)were with a hormonal relation of 2:1 of BAP and NAA,respectively,with a fresh weight yield ranging from 1.7905 g to 5.8340 g,which represents around 70%.An adaptation phase was observed from day 0 to day 14 on the curve of fresh weight;an exponential phase at day 14 to day 19 and a declination phase at day *** forms in the adaptation phase were elongated cells,a few globular and a few with kidney *** the exponential phase,these cells formed small aggregates of globular *** the death phase,brown,elongated,damaged and fragmented cells were *** this data obtained it is possible to establish the subculture time in fresh medium.

关键词： Bougainvillea kinetics of cell growth in vitro culture

Synthesis of Solid Acid Catalysts Based on TiO2- SO42-and Pt/TiO2- SO42-Applied in n-Hexane Isomerization

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Open Journal of Metal 2013年第3期3卷 34-44页

作者： Juan Manuel Hernández Enríquez Luz Aracely Cortez Lajas Ricardo García Alamilla Estefanía ángeles San Martín Pedro García Alamilla Edward Brent Handy Guadalupe Cárdenas Galindo Luz Arcelia García Serrano CIEP Facultad de Ciencias Químicas Universidad Autónoma de San Luis Potosí Av. Dr. Manuel Nava #6 Zona Universitaria 78210 San Luis Potosí San Luis Potosí México Instituto Politécnico Nacional Centro Interdisciplinario de Investigaciones y Estudios sobre Medio Ambiente y Desarrollo 30 de Junio #1520 Barrio La Laguna Ticomán 07340 México D.F. México Instituto Tecnológico de Cd. Madero División de Estudios de Posgrado e Investigación Juventino Rosas y Jesús Urueta S/N Col. Los Mangos 89440 Cd. Madero Tamaulipas México Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Agropecuarias Avenida Universidad S/N Zona Cultura Colonia Magisterial 86040 Villahermosa Tabasco México

The physicochemical properties and catalytic activity of pure and sulfated titanium oxide (TiO2 and ) is described in this work. Titanium hydroxide synthesized by the sol-gel method was impregnated with a 1 N H2SO4 solution, varying amount of sulfate ions () in the range from 10 to 20 wt%. Pure and modified hydroxides were calcined at 500°C for 3 h and then characterized by TGA-DTG, XRD, BET, FT-IR, potentiometric titration with n-butylamine and 2-propanol dehydration. Catalytic activity of materials was tested in the n-hexane isomerization at 350°C. The results showed that TiO2 and mainly developed anatase phase. All have acceptable specific surface area (95-105 m2/g). Potentiometric titration with n-butylamine revealed that showed higher acidity (430-530 mV) than compared to pure TiO2 (﹣15 mV), indicating that this oxide only has weak acidity. The results showed good relationship between acidity determined by potentiometric titration with n-butylamine and the catalytic activity evaluated by 2-propanol dehydration and n-hexane isomerization. Titanium oxide with 20 wt% ofions was the material that demonstrated the highest catalytic activity for both reactions.

关键词： Acid Catalysts Sulfated Titanium Oxide Physico-Chemical Properties n-Hexane Isomerization

Isolation and Characterization of Mercury Resistant Trichoderma Strains from Soil with High Levels of Mercury and Its Effects on Arabidopsis thaliana Mercury Uptake

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Advances in Microbiology 2018年第7期8卷 600-613页

作者： JoséLuis Hernández-Flores JoséGerardo Bernal Melo Andrés Cruz Hernández Miguel A.Ramos López Carlos Saldana Gutiérrez Sergio Romero Gomez Victor Pérez Moreno Rosa P.Calvillo Medina JoséHumberto Valenzuela Soto Sergio Pacheco Hernández George H.Jones Sergio Casas Flores Juan Campos-Guillen Laboratorio de Bioseguridad y Análisis de Riesgo Departamento de Ingeniería Genética de PlantasCentro de Investigación y de Estudios Avanzados del IPNIrapuatoGto.México Facultad de Química Universidad Autónoma de QuerétaroCerro de las Campanas s/nQuerétaroQro.México Escuela de Agronomía Universidad De La Salle Bajíocampus Campestre.LeónGto.México Facultad de Ciencias Naturales Universidad Autónoma de QuerétaroAv.De las Ciencias S/NQuerétaroQro.México Centro de Investigación en Química Aplicada Blvd.Enrique Reyna Hermosillo No.140SaltilloCoahuilaMéxico Department of Biology Emory UniversityAtlantaGeorgiaUSA IPICYT División de Biología Molecular.Camino a la presa San JoséNo.2055Colonia Lomas 4a sección.C.P.San Luis PotosíMexico

Traditional mining activities are usually correlated with high levels of soil pollution, which is a major environmental concern. Extensive mining activities have taken place in the San Joaquin region in the State of Querétaro, México resulting in high levels of mercury soil pollution (up to 1532 ± 300 mg/kg). We isolated mercury-resistant fungal strains from the San Joaquin region soils and identified them through morphologic characteristics and ITS rDNA region sequence analysis. We determined that fungi isolated belong to the genus Trichoderma. All the isolates selected showed the ability to catalyze the volatilization of Hg. For air sampling, an active sampling device was constructed and using acid KMnO4 as an absorbent, the concentration of mercury in solution was determined through the cold vapor atomic absorption method. The results show mercury volatilization from the fungal species assay, with a maximum of 213.04 ± 32.6 μg/m3 while mycelium accumulation ranged from less than 17.5 ± 2.9 to 20.0 ± 3.4 μg/g. The fungal isolates were also evaluated for their ability to reduce mercury uptake in Arabidopsis thaliana. These observations suggest the utility of Trichoderma for the mobilization of mercury in those contaminated soils.

关键词： Volatilization Mercury Trichoderma Soil Bioremediation