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Journal of Renewable Materials 2021年第10期9卷 1699-1706页

作者： Judith Constantino-Alcazar Miguel Abud-Archila Benjamín Valdez-salas Federico Gutierrez-Miceli Carlos Ceceña-Duran Blanca López-Valenzuela Daniel Gonzalez-Mendoza Tecnológico Nacional de México Instituto Tecnológico de Tuxtla GutiérrezTuxtlaGutiérrezC.P.03940México Instituto de Ciencias Agrícolas de la Universidad Autónoma de Baja California(ICA-UABC) Ejido Nuevo LeónC.P.21705México Instituto de Ingeniería de la Universidad Autónoma de Baja California Mexicali21100México

In the present study,the green synthesis of potassium nanoparticles(K-NPs)was assessed using aqueous extract of Sideroxylon *** potassium nanoparticles were analyzed by UV-visible spectroscopic techniques,X-ray spectrometers of energy dispersive(SEM-EDS)and dynamic light *** results showed high values at 3.5 keV confirming the formation of potassium nanoparticles and the SEM analysis showed an agglomerated particles size between 360 to 200 nm with a spherical *** K-NPs showed an effective antibacterial activity against the test organisms mainly with Bacillus cereus,Enterobacter aerogenes,Fusarium solani and Botrytis *** further studies about nanotoxicity of K-NPs are needed to confirm their potential in the control of the pathogen microorganisms under field conditions.

关键词： Antimicrobial effect green synthesis Sideroxylon capiri biocontrol

Isotropic compression behavior of granular assembly with non-spherical particles by X-ray micro-computed tomography and discrete element modeling

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第5期13卷 972-984页

作者： Nan Zhang Ahmadreza Hedayat Shaoyang Han Runlin Yang Héctor Gelber Bolaños Sosa Juan JoséGonzález Cárdenas Guido Edgard salasÁlvarez department of Civil and Environmental Engineering Colorado School of Mines1500 Illinois St.GoldenCO80401USA Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing210098China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China Universidad Nacional de San Agustín de Arequipa ArequipaPeru

The particle morphological properties,such as sphericity,concavity and convexity,of a granular assembly significantly affect its macroscopic and microscopic compressive behaviors under isotropic loading ***,limited studies on investigating the microscopic behavior of the granular assembly with real particle shapes under isotropic compression were *** this study,X-ray computed tomography(mCT)and discrete element modeling(deM)were utilized to investigate isotropic compression behavior of the granular assembly with regard to the particle morphological properties,such as particle sphericity,concavity and interparticle *** mCT was first used to extract the particle morphological parameters and then the deM was utilized to numerically investigate the influences of the particle morphological properties on the isotropic compression *** image reconstruction from mCT images indicated that the presented particle quantification algorithm was robust,and the presented microscopic analysis via the deM simulation demonstrated that the particle surface concavity significantly affected the isotropic compression *** observations of the particle connectivity and local void ratio distribution also provided insights into the granular assembly under isotropic *** found that the particle concavity and interparticle friction influenced the most of the isotropic compression behavior of the granular assemblies.

关键词： X-ray computed tomography(mCT) Discrete element modeling(deM) Isotropic compression Particle surface curvature Particle morphology

A Systematic Approach for Hydrological Model Couplings

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International Journal of Communications, Network and System Sciences 2012年第6期5卷 343-352页

作者： Daniel salas Xu Liang Yao Liang department of Civil and Environmental Engineering University of Pittsburgh Pittsburgh USA department of Computer and Information Science Indiana University-Purdue University Indianapolis Indianapolis USA

It is of great importance to develop a systematic framework to integrate and coordinate software components to effectively and efficiently accomplish complex hydrological modeling tasks. In this paper, we examine the state-of-art information technologies including service-oriented architecture, and propose a systematic approach based on service-oriented architecture and scientific workflow to investigate the general model coupling problems. A prototype system, MoteWS, based on web services for publishing field measurement data from wireless sensor networks is developed to preliminarily explore and test our proposed architecture. Results and lessons learned are discussed and future recommendations in this direction are provided.

关键词： Service-Oriented Architecture Scientific Workflow Web Services Wireless Sensor Network Data Retrieval

Analytical approximations to a generalized forced damped complex Duffing oscillator:multiple scales method and KBM approach

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Communications in Theoretical Physics 2023年第2期75卷 18-27页

作者： Weaam Alhejaili Alvaro H salas S A El-Tantawy department of Mathematical Sciences College of SciencePrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia department of Mathematics and Statistics Universidad Nacional de ColombiaFIZMAKO Research GroupColombia department of Physics Faculty of SciencePort Said UniversityPort Said 42521Egypt Research Center for Physics(RCP) Department of PhysicsFaculty of Science and ArtsAl-MikhwahAl-Baha UniversitySaudi Arabia

In this investigation,some different approaches are implemented for analyzing a generalized forced damped complex Duffing oscillator,including the hybrid homotopy perturbation method(H-HPM),which is sometimes called the Krylov-Bogoliubov-Mitropolsky(KBM)method and the multiple scales method(MSM).All mentioned methods are applied to obtain some accurate and stable approximations to the proposed problem without decoupling the original *** obtained approximations are discussed graphically using different numerical values to the relevant ***,all obtained approximate solutions are compared with the 4thorder Runge-Kutta(RK4)numerical *** maximum residual distance error(MRde)is also estimated,in order to verify the high accuracy of the obtained analytic approximations.

关键词： complex Duffing oscillators forced damped complex oscillator multiple scales method KBM method

Validation of Total Daily Energy Expenditure Calculated with Actiheart against Doubly Labeled Water Method in Costa Rican Schoolchildren

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Food and Nutrition Sciences 2015年第13期6卷 1193-1201页

作者： Juan Diego Zamora-salas Adriana Laclé-Murray Health Research Institute University of Costa Rica San José Costa Rica

The purpose of this study was to use the measurement of the PAEE taken from Actiheart in order to calculate the TEE in Costa Rican schoolchildren, and at the same time, to determine the effectiveness when it is compared against the TEE obtained by the DLW. A total of sixteen male schoolchildren were measured for their total daily energy expenditure (TEE) with the doubly labeled water (DLW) technique. The TEE obtained by the Actiheart monitor was calculated and validated against the DWL. The TEE was obtained adding the physical activity energy expenditure given by the Actiheart, plus the basal metabolic rate, and the energy cost of growth. The Pearson’s product‐moment correlation coefficient and the paired t‐test sample were measured in order to identify the association of the data and to evidence the differences between both measurements of TEE respectively. The Lin’s concordance correlation coefficient and the Bland-Altman plot evaluated the concordance of both methods. The correlation between the TEE obtained by DLW and the one calculated by Actiheart was r = 0.97, P < 0.001. The paired t-test showed no significant differences between both methods. Lin’s concordance correlation coefficient was Cb = 0.99, classified as almost perfect. The study validated the TEE calculated with Actiheart against the TEE measured by the DLW.

关键词： Actiheart Doubly Labeled Water Energy Expenditure Isotopic Technique Schoolchildren Total Energy Expenditure

Rediscovering Forgotten Members of the Graphene Family

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Accounts of Materials Research 2020年第2期1卷 117-122页

作者： Nieves Lopez-salas Janina Kossmann Markus Antonietti Colloid Chemistry department Max Planck Institute of Colloids and Interfaces14476 PotsdamGermany

Carbon materials with controlled nanostructure or,better,covalent two-dimensional systems are currently a scientific megatrend,but not new as *** applications ranging from conductance,sensing,selective sorption,over(electro)catalysis to stretchable electronics,energy conversion,and storage were recently presented and will constitute the core of future *** is also commonplace that all these applications can still be improved by the development of new carbon or carbon derived materials to be implemented at the industrial *** relatively recent exploration of graphene,as for instance explored also in the European Graphene Flagship,marked a turn-around in the societal perception of all of those ***,delaminated graphene is not new as such,with the employed techniques by Hummers1 or ***^2 as early as 1958 and 1962.

关键词： laminated instance Graphene

Acute hepatitis with autoimmune features after COVID-19 vaccine:coincidence or vaccine-induced phenomenon?

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Gastroenterology Report 2022年第1期10卷 628-631页

作者： Jose M.Pinazo-Bandera Alicia Hernandez-Albujar Ana Isabel Garcia-Salguero Isabel Arranz-salas Raul J.Andrade Mercedes Robles-Diaz Division of Gastroenterology and Hepatology Instituto de Investigacion Biomedica de Malaga-IBIMAHospital Universitario Virgen de la VictoriaUniversidad de MalagaMalagaSpain Division of Anatomical Pathology Hospital Universitario Virgen de la VictoriaMalagaSpain Centro de Investigacion Biomedica en Red de Enfermedades Hepaticas y Digestivas(CIBERehd) MadridSpain

Introduction Autoimmune diseases result from a breach of immunological self-tolerance and tissue damage by autoreactive T *** acute respiratory syndrome coronavirus-2(SARS-CoV-2)infection is characterized by an inflam... 详细信息

关键词： autoimmune vaccine acute

Comparative study on simultaneous removal of calcium and sulfate ions from flotation recycling water by aluminum hydroxide

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Transactions of Nonferrous Metals Society of China 2022年第7期32卷 2379-2390页

作者： Ángel Daniel GUERRERO-FLORES Martha Araceli ELIZONDO-ÁLVAREZ JoséManuel FLORES-ÁLVAREZ Alejandro URIBE-salas department of Metallurgical Engineering CINVESTAV-IPNUnidad Saltillo25900Ramos ArizpeCoahuilaMéxico department of Materials Unidad Académica de Ingeniería IUniversidad Autónoma de Zacatecas“Francisco García Salinas”ZacatecasZacatecasMéxico Facultad de Ciencias Químicas Universidad de ColimaCoquimatlánColimaMéxico

Due to the environmental policies and economic reasons,the water used in some flotation operations of complex sulfide ores is recirculated,causing the ion concentration of some species to increase over time,affecting the flotation of the minerals of *** this work,an experimental and thermodynamic analysis of the synthetic solutions was presented with a high content of calcium and sulfate *** study focused on evaluating the use of two aluminum compounds for the precipitation of Ca^(2+)and SO_(4)^(2−)in the form of *** amorphous aluminum hydroxide was found to be more efficient than the crystalline one,giving rise to 83%calcium and 91%sulfate *** XRD analysis of the solids showed the main reaction product of ettringite,accompanied by small amounts of calcite,due to the absorption of atmospheric carbon *** final solution after the chemical treatment showed residual calcium and sulfate concentrations below 200 mg/***,the kinetics of calcium removal appeared to correspond to a second order reaction with respect to calcium concentration,with an apparent activation energy of 53.48 kJ/mol,which may suggest that the ettringite precipitation process is governed by the chemical reaction.

关键词： ettringite ion removal aluminum hydroxide calcium sulfate

Gene expression changes in blood RNA after swimming in a chlorinated pool

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Journal of Environmental Sciences 2017年第8期29卷 250-261页

作者： Lucas A.salas Laia Font-Ribera Mariona Bustamante Lauro Sumoy Joan O.Grimalt Sarah Bonnin Maria Aguilar Heidi Mattlin Manuela Hummel Anna Ferrer Manolis Kogevinas Cristina M.Villanueva ISGlobal Centre for Research in Environmental Epidemiology(CREAL)Barcelona Spain department of Epiderniology The Geisel School of Medicine at Dartmouth Lebanon NH USA Universitat Pompeu Fabra (UPF) Barcelona Spain CIBER Epiclemiologia y Salud Publica (CIBERESP) Barcelona Spain IMIM (Hospital del Mar Medical Research Institute) Barcelona Spain Genomics and Disease Centre for Genomic Regulation (CRG) The Barcelona Institute of Science and Technology Barcelona Spain Genomics Core Facility Centre for Genomic Regulation (CRG) The Barcelona Institute of Science and Technology Barcelona Spain Institute of Predictive and Personalized Medicine of Cancer (IMPPC) Institut Germans Trias i Pujol (IGTP) Can Ruti Campus Badalona Spain department of Environmental Chemistry Institute of Environmental Assessment and Water Research (CSIC) Barcelona Spain

Exposure to disinfection by-products（DBP） such as trihalomethanes（THM） in swimming pools has been linked to adverse health effects in humans, but their biological mechanisms are unclear. We evaluated short-term changes in blood gene expression of adult recreational swimmers after swimming in a chlorinated pool. Volunteers swam 40 min in an indoor chlorinated pool. Blood samples were drawn and four THM（chloroform,bromodichloromethane, dibromochloromethane and bromoform） were measured in exhaled breath before and after swimming. Intensity of physical activity was measured as metabolic equivalents（METs）. Gene expression in whole blood m RNA was evaluated using Illumina Human HT-12v3 Expression-Bead Chip. Linear mixed models were used to evaluate the relationship between gene expression changes and THM exposure. Thirty-seven before-after pairs were analyzed. The median increase from baseline to after swimming were： 0.7 to 2.3 for MET, and 1.4 to 7.1 μg/m^3 for exhaled total THM（sum of the four THM）.Exhaled THM increased on average 0.94 μg/m^3 per 1 MET. While 1643 probes were differentially expressed post-exposure. Of them, 189 were also associated with exhaled levels of individual/total THM or MET after False Discovery Rate. The observed associations with the exhaled THM were low to moderate（Log-fold change range：-0.17 to 0.15）. In conclusion, we identified short-term gene expression changes associated with swimming in a pool that were minor in magnitude and their biological meaning was unspecific. The high collinearity between exhaled THM levels and intensity of physical activity precluded mutually adjusted models with both covariates. These exploratory results should be validated in future studies.

关键词： Trihalomethanes Disinfection by-products Gene expression Swimming pools Metabolic rate

Theoretical analysis of Bloch mode propagation in an integrated chain of gold nanowires

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Photonics Research 2014年第1期2卷 24-30页

作者： Ricardo Tellez-Limon Mickael Fevrier Aniello Apuzzo Rafael salas-Montiel Sylvain Blaize Laboratoire de Nanotechnologie et d’Instrumentation Optique Institut Charles DelaunayCNRS-UMR 6279Universitéde Technologie de TroyesCS 4206010004TroyesFrance

The eigenmodes analysis of Bloch modes in a chain of metallic nanowires(MNWs)provides a significant physical understanding about the light propagation phenomena involved in such ***,most of these analyses have been done above the light line in the dispersion relation,where the Bloch modes can only be excited with radiative *** making use of the Fourier modal method,in this paper we rigorously calculate the eigenmode and mode excitation of a chain of MNWs via the fundamental transverse magnetic(TM)mode of a dielectric *** and dipolar transversal Bloch modes were obtained in an MNW chain embedded in a dielectric *** modes can be coupled efficiently with the fundamental TM mode of the *** the eigenmodes supported by the integrated plasmonic structure exhibit strong localized surface plasmon(LSP)resonances,they could serve as a nanodevice for sensing ***,the analysis opens a direction for novel nanostructures,potentially helpful for the efficient excitation of LSPs and strong field enhancement.

关键词： material. Bloch propagation