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Pulsatile electroosmotic flow of a Maxwell fluid in a parallel flat plate microchannel with asymmetric zeta potentials

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Applied Mathematics and Mechanics(English Edition) 2018年第5期39卷 667-684页

作者： M.PERALTA O.bautista F.MENDEZ E.bautista Seccion de Estudios de Posgrado e Investigacion ESIME Azcapotzalco Instituto Politecnico NacionalCiudad de Mexico 02250Mexico Facultad de Ingeniería Universidad Nacional Autonoma de MexicoCiudad de Mexico 04510Mexico

The pulsatile electroosmotic flow （PEOF） of a Maxwell fluid in a parallel flat plate microchannel with asymmetric wall zeta potentials is theoretically analyzed. By combining the linear Maxwell viscoelastic model, the Cauchy equation, and the electric field solution obtained from the linearized PoissomBoltzmann equation, a hyperbolic par- tial differential equation is obtained to derive the flow field. The PEOF is controlled by the angular Reynolds number, the ratio of the zeta potentials of the microchannel walls, the electrokinetic parameter, and the elasticity number. The main results obtained from this analysis show strong oscillations in the velocity profiles when the values of the elas- ticity number and the angular Reynolds number increase due to the competition among the elastic, viscous, inertial, and electric forces in the flow.

关键词： pulsatile electroosmotic flow (PEOF) flat plate microchannel asymmetric zeta potential Maxwell fluid

Self-renewal of peripheral nerve resident macrophage:does it represent a unique activation status?

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Neural Regeneration Research 2022年第5期17卷 999-1000页

作者： Maricris bautista Anand Krishnan Department of Anatomy Physiologyand PharmacologyCollege of MedicineUniversity of SaskatchewanSaskatoonSKCanada Cameco MS Neuroscience Research Centre(CMSNRC) University of SaskatchewanSaskatoonSKCanada

Macrophages are immune cells of myeloid origin and are present in almost all *** perform a wide variety of functions contributing to tissue development,homeostasis,pathogenesis,and repair(Wynn et al.,2013).Strikingly,macrophages residing at different tissues,and at different compartments of an individual tissue,demonstrate enormously diverse molecular characteristics(Gordon and Taylor,2005).

关键词： al. homeostasis macrophage

A Data Security Framework for Cloud Computing Services

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Computer Systems Science & Engineering 2021年第5期37卷 203-218页

作者： Luis-Eduardo bautista-Villalpando Alain Abran Department of Electronic Systems Autonomous University of AguascalientesAguascalientes20131Mexico Department of Software Engineering and Information Technology ETSUniversity of QuebecMontrealH3C 1K3Canada

Cyberattacks are difficult to prevent because the targeted companies and organizations are often relying on new and fundamentally insecure cloudbased technologies,such as the Internet of *** increasing industry adoption and migration of traditional computing services to the cloud,one of the main challenges in cybersecurity is to provide mechanisms to secure these *** work proposes a Data Security Framework for cloud computing services(CCS)that evaluates and improves CCS data security from a software engineering perspective by evaluating the levels of security within the cloud computing paradigm using engineering methods and techniques applied to *** framework is developed by means of a methodology based on a heuristic theory that incorporates knowledge generated by existing works as well as the experience of their *** paper presents the design details of the framework,which consists of three stages:identification of data security requirements,management of data security risks and evaluation of data security performance in CCS.

关键词： Cloud computing services computer security data security data security requirements data risk data security measurement

Stipa tenacissima Does not Affect the Foliar δ^(13)C and δ^(15)N of Introduced Shrub Seedlings in a Mediterranean Semi-arid Steppe

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Journal of Integrative Plant Biology 2006年第8期48卷 897-905页

作者： Fernando T.Maestre Susana bautista Jordi Cortina Departamento de Ecologia Universidad de AlicanteApartado de correos 9903080 AlicanteSpain Department of Biology Duke UniversityPhytotron BuildingScience DriveBox 90340DurhamNorth Carolina 27708-0340USA Centro de Estudios Ambientales del Mediterraneo C/ Charles Darwin 1446980 PaternaSpain

Recent studies have shown that the tussock grass Stipa tenacissima L. facilitates the establishment of late-successional shrubs, in what constitutes the first documented case of facilitation of woody plants by grasses. With the aim of increasing our knowledge of this interaction, in the present study we investigated the effects of S. tenacissima on the foliar δ13C, δ15N, nitrogen concentration, and carbon ： nitrogen ratio of introduced seedlings of Pistacia lentiscus L., Quercus coccifera L., and Medicago arborea L. in a semi-arid Mediterranean steppe. Six months after planting, the values of δ13C ranged between -26.9‰ and -29.6‰, whereas those of δ15N ranged between -1.9‰ and 2.7‰. The foliar C ： N ratio ranged between 10.7 and 53.5, and the nitrogen concentration ranged between 1.0% and 4.4%. We found no significant effect of the microsite provided by S. tenacissima on these variables in any of the species evaluated. The values of δ13C were negatively correlated with predawn water potentials in M. arborea and were positively correlated with relative growth rate in Q. coccifera. The values of δ15N were positively correlated with the biomass allocation to roots in the latter species. The present results suggest that the modification of environmental conditions in the are surrounding S. tenacissima was not strong enough to modify the foliar isotopic and nitrogen concentration of shrubs during the early stages after planting.

关键词： facilitation Medicago arborea Pistacia lentiscus Quercus coccifera stable isotopes steppe Stipa tenacissima.

A wild bocs having strong homogeneous property

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Chinese Science Bulletin 1997年第2期42卷 108-112页

作者： Zhang, YB Lei, TG bautista, R Department of Mathematics Beijing Normal University Beijing China Institute of Mathematics UNAM Mexico

Bocs, which is the abbreviated form of bimodule over a categary with coalgebra structure, was introduced by Kleiner and Rojter in 1975 and developed by Drozd in 1979, then formulated by Crawley-Boevey in 1988. Let k be an algebraically closed field, A a finitely dimensional k-algebra. Then there exists a bocs B over k associated to A. From this relation Drozd proved one of the most important theorems in representation theory of algebra, namely, a finitely dimensional k-algebra is either of representation tame type or of representation wild type,

关键词： bocs wild representation type Auslander-Reiten sequence homogeneous property.

How to rectify the misuse of scientific names in bioscience?

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Chinese Science Bulletin 2014年第13期59卷 1479-1481页

作者： Zi-Min Hu Lopez-bautista Juan De-Lin Duan Institute of Oceanology Chinese Academy of Sciences Department of Biological Sciences The University of Alabama

The misuse of scientific names for species of organisms is a widespread and long-standing academic phenomenon;however,its negative impacts to scientific community and the public have been largely overlooked all *** we exemplified two research cases in seaweeds to highlight the extent and dimension of misused scientific names of species in bioscience,and present a few feasible measurements to rectify such a *** ultimate goal is to create a discussion platform and to draw deserved attention of scientific name to taxonomy-related scientists.

关键词：生物科学名称误用纠正生物物种科学家分类学海藻

Influence of growing location and cultivar on Rhyzopertha dominica （Coleoptera： Bostrichidae） and Sitophilus oryzae （Coleoptera： Curculionidae） infestation of rough rice

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Insect Science 2007年第3期14卷 231-239页

作者： FRANK H. ARTHUR RUSTY C. bautista TERRENCE J. SIEBENMORGEN USDA-ARS Grain Marketing and Production Research Center Manhattan Kansas Department of Food Science University of Arkansas Fayetteville Arkansas USA

Long-grain rice cultivars Cocodrie, Wells, and XP 723 grown in three locations （Hazen, MO; Essex and Newport, AR, USA）, and medium-grain rice cultivars Bengal and XP 713 grown in two locations （Jonesboro and Lodge Corner, AR, USA）, were harvested and assayed for susceptibility to Rhyzopertha dominica （F.）（Coleoptera： Bostrichidae）, the lesser grain borer, and Sitophilus oryzae （L.）（Coleoptera： Curculionidae）, the rice weevil, on rice held at 27℃, 57% and 75% relative humidity （RH）. Separate samples from the same harvest lots were also analyzed for the physical characteristics of brown rice yield, percentage whole kernels and kernel thickness. Progeny production and feeding damage of R. dominica were significantly different among long-grain cultivars within two of the three locations （P 〈 0.05）, but not for location or RH （P ≥ 0.05）, while progeny production of S. oryzae was different among cultivars, location, and RH （P 〈 0.05）. On medium-grain rice, both cultivar and location were significant for progeny production of R. dominica, but not RH, while cultivar and RH were significant for progeny production of S. oryzae, but not location. On both rice types, feeding damage of R. dominica followed the same trends and was always strongly positively correlated with progeny production （P 〈 0.05）, but for S. oryzae there were several instances in which progeny production was not correlated with feeding damage （P ≥ 0.05）. Physical characteristics of both rice types were statistically significant （P 〈 0.01） but actual numerical differences were extremely small, and were generally not correlated with progeny production of either species. Results indicate that the location in which a particular rice cultivar is grown, along with its characteristics, could affect susceptibility of the rice to R. dominica and S. oryzae.

关键词： rough rice cultivars stored-product insects Rhyzopertha dominica Sitophilus oryzae

The investigation of fly ash based asphalt binders using atomic force microscope

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Frontiers of Earth Science 2017年第4期11卷 380-387页

作者： Rajan SAHA Kyle MALLOY Emil bautista Konstantin SOBOLEV Department of Civil and Environmental Engineering University of Wisconsin at Milwaukee WI 53705 USA

Atomic Force Microscope （AFM） is a relatively new technique for investigation of construction materials. In this study AFM was used to investigate the interaction of asphalt binder with fly ash. Fly ash is a coal combustion byproduct of electric power utilities having pozzolanic properties and commonly used in Portland cement concrete. In this study, an investigation was made by using different types of fly ash with two types of asphalt binders such as PG 58-28 and PG 64-28. Asphalt microstructure is divided into four subgroups such as Saturates, Aromatics, Resins and Asphaltenes （SARA）. These four phases can be distinguished by the atomic force microscope. The interaction of these phases affected by introducing fly-ash was investigated and correlation with rheological properties was observed.

关键词： AFM fly ash bee rheology asphalt

Synthesis of activated carbons from black sapote seeds,characterization and application in the elimination of heavy metals and textile dyes

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Chinese Journal of Chemical Engineering 2020年第2期28卷 613-623页

作者： Alejandra Alicia Peláez-Cid Vincent Romero-Hernández Ana María Herrera-González Alejandro bautista-Hernández Oscar Coreno-Alonso Facultad de Ingeniería Benemérita Universidad Autónoma de PueblaMexico Instituto de Ciencias Básicas e Ingeniería Universidad Autónoma del Estado de HidalgoMexico División de Ingenierías Universidad de GuanajuatoMexico

Many different techniques may be used to remove industrial pollutants from wastewater. Adsorption using activated carbon has been reported to be an effective method. This work proposes the use of a vegetable residue(black sapote seeds) as a raw material for its synthesis. These carbons were chemically activated using phosphoric acid and carbonized at 673 and 873 K. Adsorption isotherms were constructed for the textile dyes on the carbons, and this data was treated using Langmuir’s equation to quantitatively describe the adsorption process. The synthesized carbons were characterized using FTIR, EA, SEM, Nitrogen adsorption(specific surface areas of 879 and 652 m2·g-1), and their points of zero charge(2.1 and 2.3). It was possible to adsorb both heavy metals and textile dyes present in aqueous solutions and wastewaters using these activated carbons. Heavy metals were adsorbed almost completely by both carbons. Cationic dyes where adsorbed(58–59.8 mg·g-1) in greater amounts compared to anionic dyes(10–58.8 mg·g-1). The amount of anionic dyes adsorbed increased almost 30% by changing the pH of the solutions. One of the carbons was thermally regenerated on three occasions without losing its adsorption capacity and it was proved in a flow system.

关键词： Activated carbons Black sapote seeds Heavy metal adsorption Textile dye adsorption Wastewater treatment