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Numerical Study of the Distribution of Temperatures and Relative Humidity in a Ventilated Room Located in Warm Weather

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Computer Modeling in Engineering & Sciences 2020年第5期123卷 571-602页

作者： J.Serrano-Arellano J.M.Belman-Flores I.Hernández-Pérez K.M.Aguilar-Castro E.V.Macías-Melo F.Elizalde-Blancas J.M.Riesco-Ávila F.J.García-Rodríguez Instituto Tecnológico Superior de Huichapan El SaucilloHuichapan42411México universidad de Guanajuato Palo BlancoSalamanca36885México universidad juárez autónoma de tabasco CunduacánTabasco86690México Instituto Tecnológico de Celaya Col.FovisssteCelaya38010México

In the present study,an analysis of the heat and mass transfer in a ventilated cavity in a warm climate zone was carried out to analyze,among others,the temperatures and percentage of relative humidity(RH).The governing equations of the mathematical model were solved through the finite volume method.We used the k-εturbulence mode to find the results of the variables of interest in seven climate records on a given day.The velocity of the inlet flow of the air-H2O mixture was varied through the Reynolds number(Re)from 500 to 10000.The outdoor weather conditions considered were solar radiation,ambient temperature,and RH.It was found that at low velocities,flow recirculation was formed inside the cavity which increased the temperature and concentration of RH.For Re=5000 the flow is predominantly forced,which tends to set the values of temperature and RH as 20°C and 20%respectively.The values of the RH increase in the afternoon hours when the solar radiation decreases to the value of zero.However,the mass transfer through the values of Sh is maintained with similar values in the seven weather records.It was concluded that when air conditioning supplies air at speeds higher than 0.26 m/s at low temperatures it produces cooling with low RH,this causes discomfort,illness and/or discomfort to the users.

关键词： Heat transfer mass transfer solar radiation turbulence

Morphometry and Mineral Content in the Seeds and Soil of Two Species of Argemone L.(Papaveraceae)in the Central Part of the Chihuahuan desert

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Phyton-International Journal of Experimental Botany 2024年第2期93卷 371-386页

作者： Perla Patricia Ochoa-García Jaime Sánchez-Salas Ricardo Trejo-Calzada Jesús JosafathQuezada-Rivera Fabián García-González Unidad Regional Universitaria de ZonasÁridas BermejilloUniversidad Autónoma ChapingoDurango35230México Facultad de Ciencias Biológicas Universidad Juárez del Estado de DurangoGómez PalacioDurango35010México

The genus Argemone L.(Papaveraceae)is found widely distributed in Mexico’s Chihuahuan desert(CD).Some species of this genus are of phytochemical or ethnobotanical interest.They are inedible plants considered as scrubs.To date they have not been broadly studied;thus,their ecology is,to our knowledge,unknown.The present work was centered around carrying out a morphometric analysis and the determination of minerals in the soil and seeds of the wild populations of Argemone at sites belonging to two ecoregions of the CD in Mexico.In April 2021 and April 2022,seeds of Argemone spp.,and soil samples were collected at 10 sites of the CD.The seeds were selected under a randomized design,and weight,length,diameter,thickness,buoyancy,and mineral content were determined.The soil samples were obtained under the Mexican regulation NOM-021-RECNAT-2000,and determinations of mineral content,electrical conductivity,apparent density,and soluble anions were performed.The information obtained was grouped by variable,species,and place of precedence.The statistical tests consisted of an ANOVA,Tukey means tests considering p≤0.05,and a Principal Components Analysis.Argemone pleiacantha exhibited differences in terms of weight(F=54.79,p=0.001),length(F=90.83,p=0.001),thickness(F=104.89,p=0.001),and diameter(F=155.82,p=0.001),and the differences in Argemone mexicana were in weight(F=46.71,p=0.001),thickness(F=187.49,p=0.001),length(F=191.56,p=0.001),and diameter(F=215.83,p=0.001).The evaluated seeds reached their maximal imbibition velocity at 24 h of evaluation.The content of the micro-and macro-nutrients analyzed in the seeds and soil suggest a tight relation with the morphometric characteristics of the seeds.

关键词： Micronutrients agricultural area semiarid zone ecoregion buoyancy

A review from mesenchymal stem-cells and their small extracellular vesicles in tissue engineering

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BIOCELL 2022年第2期46卷 325-338页

作者： ODIN RAMIrez-FERNANdeZ ESMERALDA ZUÑIGA-AGUILAR universidad Tecnologica de Mexico-UNITEC Mexico-Campus en Linea Col.AnáhuacCiudad de México11320Mexico department of Biomedical Engineer Universidad Politecnica de ChiapasCol.Las BrisasSuchiapa29150Mexico department of Electrical and Computational Engineer Universidad Autónoma de Ciudad JuárezInstituto de Ingeniería y TecnologíaCiudad Juárez32310Mexico

This review aims to offer a vision of the clinical reality of cell therapy today in intensive medicine.For this,it has been carried out a description of the properties,functions,and Mesenchymal Stem Cells(MSCS)sources to subsequently address the evidence in preclinical models and studies clinical trials with whole cells and models attributed to small extracellular vesicles(sEVs),nanoparticles made up of microvesicles secreted by cells with an effect on the extracellular matrix,and their impact as an alternative towards cell-free regenerative medicine.MSCs are cells that enhance the regenerative capacity which can be differentiated typically in different lineages committed as bone,cartilage,and adipose tissue.On the other hand,small extracellular vesicles are structures that participate notoriously and crucially in intercellular communication,which has led to a change in the concept of the functions and the role that these vesicles play in living organisms,in the restoration of damaged tissues and the inflammatory response and immunological.We present the mechanisms that are involved in the applications of MSCS as whole cells and their sEVs in cell therapy and cell-free therapy as an alternative in regenerative medicine.Considering the structural loss that occurs after surgical procedures for cystic and tumoral pathology in periodontitis,as well as the maxillary atrophy that determines the rehabilitation with dental implants,it is imperative to find satisfactory solutions.The opportunity provided by the findings in stem cells is a recent introduction in the field of oral surgery,based on the regenerative potential that these cells possess to restore defects at different levels of the oral cavity.This review aims to discover the real applications that stem cells may have in our treatments shortly.

关键词： Tissue engineering Mesenchymal stem cells Small extracellular vesicles Acute graft-versus-host disease Cell culture Cell differentiation

Interaction of piRNA-like sequences from the 3′-UTR of SARS-CoV-2 with mRNA regions

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Genes & Diseases 2023年第6期10卷 2282-2284页

作者： Laura Pérez-Campos Mayoral María Teresa Hernández-Huerta Carlos Romero Díaz Carlos Alberto Matias-Cervantes Eduardo Pérez-Campos Mayoral Margarito Martínez Cruz juan de Dios Ruiz-Rosado Edgar Gustavo Ramos Martínez Marco Antonio Sánchez Medina Eduardo Pérez-Campos Research Center Faculty of Medicine UNAM-UABJOAutonomous University“Benito Juárez”of Oaxaca(UABJO)Oaxaca 68020Mexico CONACyT Faculty of Medicine and Surgery.Autonomous University“Benito Juárez”of Oaxaca(UABJO)Oaxaca 68020Mexico National Technology of Mexico(TecNM)/IT Oaxaca Oaxaca de JuárezOaxaca 68030Mexico The Research Institute at Nationwide Children's Hospital Columbus 43205USA Facultad de Química Universidad Nacional Autónoma de MéxicoCoyoacán 04510Mexico

Piwi-interacting RNAs(piRNAs of 26-32 nt in length)regulate gene expression,epigenetics,and transcriptional and post-transcriptional processes.1 In humans,piRNAs are expressed in germline and somatic tissues,and generally have a uracil at the 5'-end(position+1),an adenine at the+10 position,and are 2'-0 methylated at the 3'-end.2 Onice piRNAs form the RNA-induced silencing complex(RISC)with PIWl proteins,they serve as guides to find their complementary sequences of the target mRNA,thus initiating their degradation.The Wuhan patient's genome is approximately 265 nucleotides(nts)in its 3'-UTR;piRNAs-like sequences have been reported in this region.3 Our objective was to search,through bioinformatics,for mRNA sequences that were homologous to the reverse complementary of the previously reported piRNA-like sequences from the 3'-UTR of SARS-Cov-2,3 and identify the possible interaction between them.

关键词： sequences complementary initiating

Abundance of White-fronted Parrots and diet of an urban parrot assemblage(Aves:Psittaciformes)in a green Neotropical city

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Avian Research 2022年第1期13卷 36-42页

作者： CristelAlvarez-Castillo Ian MacGregor-Fors Stefan LArriaga-Weiss Claudio Mota-Vargas Diego Santiago-Alarcon Biología y Conservación de Vertebrados Instituto de EcologíaA.C.-CONACYTXalapaMexico Biological and Environmental Sciences University of HelsinkiLahtiFinland División Académica de Ciencias Biológicas Universidad Juárez Autónoma de TabascoVillahermosaMexico Biología Evolutiva Instituto de EcologíaA.C.-CONACYTXalapaMexico department of Integrative Biology University of South FloridaTampaUSA

Urban ecosystems are evolutionarily recent novel environments acting as biodiversity filters.Psittacidae birds are considered successful urban adapters mainly due to their generalist feeding and opportunistic behavior,allowing them to occupy environments from cold temperate to dry xeric areas.Therefore,it is important to understand how these species interact in the urban environment.We studied the interannual(2013–2016)abundance of the White-fronted Parrot(Amazona albifrons)in the Neotropical cities of Xalapa and Coatepec,in Central Veracruz,México.Additionally,we studied the feeding ecology during 13 months of 6 parrot species detected in the city of Xalapa.The abundance of the White-fronted Parrot was significantly higher in Xalapa than in Coatepec,and it was homogeneous across years.Non-native plants represented 30–41%of Psittacidae diets in Xalapa,where seeds were the most commonly consumed resource.We recorded the highest Psittacidae species richness and highest diet overlap among species by the end of the dry season(April–May).The White-fronted Parrot had the highest plant richness in its diet,followed by the Monk Parakeet(Myiopsitta monachus)and the Green Parakeet(Psittacara holochlorus);yet,the White-fronted Parrot had a specialized diet dominated by two plant species(Grevillea robusta and Ficus aurea).The diet overlap among the three above-mentioned parrot species was not significantly different to a null model,where the White-fronted Parrot and the Monk Parakeet overlapped during the months of February,April,june,and September.The White-fronted Parrot is an urban adapter that has successfully expanded its geographic range via natural means and by human activities.The invasive Monk Parakeet is currently restricted to one park in Xalapa,and it has remained in that stage for many years(i.e.,pre-expansion phase).Exotic plant species in Xalapa represent∼55%of the woody vegetation,some of which have longer flowering and fruiting periods that may have aided the successful establishment of parrot species in urb

关键词： Biological invasions Feeding ecology Population biology Psittacidae Urban ecology

Addition of phenolic compounds to bread: antioxidant benefits and impact on food structure and sensory characteristics

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Food Production, Processing and Nutrition

Food Production, Processing and Nutrition 2021年第1期3卷 314-325页

作者： Yesica A.Czajkowska–González Emilio Alvarez–Parrilla Nina del Rocío Martínez–Ruiz Alma A.Vázquez–Flores Marcela Gaytán–Martínez Laura Ade la Rosa departament of Chemical Biological Sciences Institute of Biomedical SciencesUniversidad Autónoma de Ciudad JuárezAnillo Envolvente del PRONAF y Estocolmos/nC.P.32310 Cd.JuárezMéxico Programa de Posgrado en Alimentos del Centro de la República(PROPAC) Research and Graduate Studies in Food ScienceSchool of ChemistryUniversidad Autónoma de QuerétaroCentro UniversitarioCerro de las Campanas S/NC.P.76010 Santiago de QuerétaroMexico

The use of flours or phenolic extracts obtained from non-traditional sources or agri-food industry by-products has been a strategy used to formulate new bakery products with characteristics of a functional food.However,phenolic compounds present great structural diversity,as well as the ability to interact in a complex way with the macromolecules that constitute the bread matrix.Therefore,the addition of these flours,extracts or pure compounds produces various effects on the microstructure of bread,and several of its sensory properties.This is mainly due to interactions between phenolic compounds and gluten proteins.The objective of this review is to analyze some of the most recent published works on the addition of phenolic compounds in wheat bread to identify the type of positive and negative effects that have been observed and how they can be related to the physicochemical interactions between phenolic compounds and the macromolecules that constitute the food matrix,mainly gluten.The effect of monomeric and polymeric phenolic compounds on the strength of these interactions and on the properties of dough and bread are discussed.

关键词： condensed tannins hydrolysable tannins phenolic acids gluten food rheology food texture protein-phenolic interactions disulfide bonds non-covalent interactions

Experimental study of friction dissipators for seismic protection of building structures

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Earthquake Engineering and Engineering Vibration 2011年第4期10卷 475-486页

作者： F. López-Almansa S.T. de la Cruz C. Taylor Technical University of Catalonia Architecture Structures Department universidad autónoma de Ciudad juárez Civil and Environmental Engineering Department Civil Engineering department University of Bristol

This paper presents the results from unidirectional shaking table tests of two reduced scale steel models of a building frame, with one and two floors, respectively. These frames incorporate friction dissipators at every floor. The inputs are sine-dwells and artificial and registered earthquakes. This study is part of a larger research project aiming to assess the seismic efficiency of friction dissipators by means of an integrated numerical and experimental approach. Inside this framework, the main objectives of these experiments are to：（i） collect a wide range of results to calibrate a numerical model derived within the project, （ii） clarify some of the most controversial issues about friction dissipators （including behavior for inputs containing pulses, capacity to reduce resonance peaks, introduction of high frequencies in the response, and self- generated eccentricities）, （iii） better understand their dynamic behavior, （iv） provide insight on the feasibility and reliability of using simple friction dissipators for seismic protection of building structures and （v） characterize the hysteretic behavior of these devices. Most of these objectives are satisfactorily reached and relevant conclusions are stated.

关键词： building structures earthquake engineering passive control friction energy dissipators experimentalverification shaking table tests

Macroscopic Quantum Behaviour of Periodic Quantum Systems

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Journal of Modern Physics 2014年第1期5卷 44-50页

作者： A. Martín-Ruiz J. Bernal Adrián Carbajal-Domínguez Instituto de Ciencias Nucleares Universidad Nacional Autónoma de México México D.F. Mexico universidad juárez autónoma de tabasco División Académica de Ciencias Básicas Cunduacán México

In this paper we introduce a simple procedure for computing the macroscopic quantum behaviour of periodic quantum systems in the high energy regime. The macroscopic quantum coherence is ascribed to a one-particle state, not to a condensate of a many-particle system;and we are referring to a system of high energy but with few degrees of freedom. We show that, in the first order of approximation, the quantum probability distributions converge to its classical counterparts in a clear fashion, and that the interference effects are strongly suppressed. The harmonic oscillator provides a testing ground for these ideas and yields excellent results.

关键词： Matrix density Quantum Interference Classical Limits

Evaluation of Ocimum basilicum L.with Different Concentrations of K^(+)as an Inhibitor of Pathogenic Bacterial Strains

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Phyton-International Journal of Experimental Botany 2021年第2期90卷 533-541页

作者： Mercedes Georgina Ramírez-Aragón Victoria Jared Borroel-García Ramón Valenzuela-Soto Ricardo David Valdez-Cepeda Francisco Javier Wong-Corral JoséLuis García-Hernández universidad Politécnica de Gómez Palacio Gómez Palacio35120México universidad autónoma Chapingo Centro Regional Universitario Centro-NorteZacatecasZac.Universidad Autónoma de ZacatecasFacultad de MatemáticasZacatecas98053México departamento de Investigación y Posgrado en Alimentos Universidad de SonoraHermosillo83000México Facultad de Agricultura y Zootecnia Universidad Juárez del Estado de DurangoGómez Palacio34000México

The extraction of bioactive compounds has become one of the most interesting areas of modern chemistry.For therapeutic reasons,it´s important to obtain antimicrobial agents from natural origin.The objective of the present study was to determine the inhibitory effect of ethanolic extract of basil(Ocimum basilicum L.var.Red Rubin)subjected to different concentrations of potassium(K^(+))on the activity of three bacterial strains that are pathogens in humans.Susceptibility was evaluated by inhibition surface and these results were compared to two antibiotics:Gentamicin(GE)and Ciprofloxacin(CPF)for their efficacy against each bacterial strain.Analyzed variables presented significant difference(p≤0.05).According to the results,basil extract evaluated showed positive antibacterial activity against the three strains of Pseudomonas aeruginosa,Listeria monocytogenes and Staphylococcus aureus on Mueller Hinton agar.It was observed highest inhibition areas of different diameters(15.3 mm,21.3 mm and 21.6 mm respectively)when the extract used was obtained from the plants with the highest concentration of potassium(13 mmol L-1).These values were even superior to the highest values showed on the treatments with the antibiotic gentamicin.

关键词： Basil inhibition potassium secondary metabolites antibiotics