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Green Synthesis of Silver Nanoparticles from Abronia villosa as an Alternative to Control of Pathogenic Microorganisms

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Journal of Renewable Materials 2020年第1期8卷 69-78页

作者： Ali Abdelmoteleb Benjamin Valdez-Salas Ernesto Beltran-Partida Daniel Gonzalez-Mendoza Botany department Faculty of AgricultureMenoufia UniversityShebin El-Kom32511Egypt Instituto de Ingeniería de la universidad Autónoma de baja california MexicaliBaja California21100México Instituto de Ciencias Agrícolas de la universidad Autónoma de baja california(ICA-UABC) Ejido Nuevo LeónBaja California21705México

The aim of this study was to evaluate the antibacterial and antifungal activities of eco-friendly synthesized silver *** silver nanoparticles were synthesized by biological method using aqueous extract of Abronia *** of silver nanoparticles was confirmed by color change and characterized using UV-visible spectroscopy,scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDX),dynamic light scattering(DLS),and zeta potential *** SEM analysis revealed the presence of spherical silver nanoparticles of the size range 21 to 33 *** silver nanoparticles were used to evaluate their antibacterial effects at different concentrations(25,50,75 and 100μg/ml)on gram negative and gram positive *** biggest halo zone was observed at 75 and 100μg/ml concentrations of silver nanoparticles against both gram positive and gram negative *** activity of biosynthesized silver nanoparticles was evaluated against seven different phytopathogenic *** showed high inhibition of radial growth toward all tested *** highest inhibition of fungal growth by AgNPs was recorded against Macrophomina phaseolina(86.06±0.92%).Biosynthesized AgNPs using plant extract are a promising to use safety for various biomedical and agricultural applications.

关键词： Antibacterial activity antifungal activity green synthesis

Insecticidal Effect of Green Bimetallic Nanoparticles from Crotalaria longirostrata on Cotton Mealybug,Phenacoccus solenopsis

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Journal of Renewable Materials 2022年第10期10卷 2543-2552页

作者： Vianey Mendez-Trujillo Benjamín Valdez-Salas Mario Curiel-Alvarez Ernesto Beltran-Partida Arnoldo Alfaro-Corres EsaúRuiz-Sanchez Gerardo Bautista-Trujillo Olivia Tzintzun Camacho Onecimo Grimaldo-Juarez Carlos Ceceña-Duran Carlos Ail-Catzin Daniel González-Mendoza Facultad de Medicina de la universidad Autónoma de baja california Dr.Humberto Torres Sanginés S/NCentro CívicoMexicaliBaja CaliforniaMéxico Instituto de Ingeniería de la universidad Autónoma de baja california Calle de la Normal S/N y Boulevard Benito JuárezMexicaliBaja CaliforniaMéxico Instituto Tecnológico de Conkal División de Estudios de Posgrado e InvestigaciónAntigua Carretera Mérida-MotulConkalYucatánMéxico Facultad de Medicina Veterinaria y Zootecnia de la universidad Autónoma de Chiapas ChiapasMéxico universidad Autónoma de baja california Instituto de Ciencias AgrícolasBaja CaliforniaMéxico

The present study was conducted to evaluate the impact of bimetallic nanoparticles(NPs)of copper(Cu)and zinc(Zn)from Crotalaria longirostrata on the insect mortality and cell viability of Phenacoccus *** biosynthesis of bimetallic nanoparticles(Cu/Zn-NPs)from *** was confirmed by the presence of a single peak around 378 *** hydrodynamic diameter of the Cu/Zn nanoparticles varied from 59 to 119 nm and their zeta potential was found to be−30.90 *** EDX analysis showed a strong signal for Cu and Zn(8 and 8.6 keV,respectively).The Cu/Zn-NPs showed an effective insecticide activity against *** with 63%of insect mortality after 96 h ***,further studies about nanotoxicity of Cu/Zn-NPs from *** are needed to reveal the exact mechanism of nanoparticles toxicity in insects.

关键词： Phytonanoparticles chipilin biocontrol agronanotechnology

Insecticidal Activity and Physicochemical Characterization of Nanoparticles from Foliar Extract of Capsicum chinense

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Journal of Renewable Materials 2023年第11期11卷 3933-3943页

作者： Arnoldo E.Alfaro-Corres Daniel Gonzalez-Mendoza Esau Ruiz-Sanchez Carlos Ail-Catzin Benjamin Valdez-Salas Federico Gutierrez-Miceli Arturo Reyes-Ramirez Jacques Fils Pierre Division of Postgraduate Studies and Research Tecnologico Nacional de MéxicoCampus ConkalConkalYucatán97345Mexico Institute of Agricultural Sciences Universidad Autonoma de Baja CaliforniaEjido Nuevo LeonMexicaliBaja California21705Mexico Instituto de Ingeniería Universidad Autónoma de Baja CaliforniaMexicaliBaja California21100Mexico Division of Postgraduate Studies and Research Tecnologico Nacional de MexicoCampus Tuxtla GutierrezTuxtla GutierrezChiapas29050Mexico

This work was carried out to evaluate the insecticidal effect of mono,bi and trimetallic nanoparticles(NPs)from leaf extract of habanero pepper(Capsicum chinense Jacq.)on the red flour beetle(Tribolium castaneum herbst.)and cotton mealybug(Phenacoccus solenopsis Tinsley).The results showed that Cu NPs,Cu/Mn NPs and Zn/Cu NPs had high insecticidal effect against ***(63%-80% mortality after 96 h).The Cu NPs and Zn/Cu NPs showed also insecticidal effect against ***,but to a lesser extent(20%–28% after 96 h).With regards to the physicochemical characterization,Cu NPs had a zeta potential of 21.1 mV,whereas Cu/Mn NPs and Zn/Cu NPs exhibited zeta potentials of 200 *** polydispersity index(PDI)values for Cu NPs,Cu/Mn NPs,and Zn/Cu NPs were 10.1,29.16,and 14.34,*** TF-IR spectra of the NPs varied from 600 to 4000 cm−*** EDX weight percentages showed the presence of Cu(0.29%–2.4%),Mn(1.4%),and Zn(2.6%)in Cu/Mn NPs and Zn/Cu NPs,respectively.

关键词： Phytonanoparticles botanical insecticide pest control agronanotechnology

Green Synthesis of Silver Nanoparticles Using Annona diversifolia Leaf Extract and Their Antimicrobial Application

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Journal of Renewable Materials 2020年第9期8卷 1129-1137页

作者： Rogelio Solorzano-Toala Daniel Gonzalez-Mendoza Benjamin Valdez-Salas Vianey Mendez-Trujillo Federico Gutierrez-Miceli Ernesto Beltran-Partida Olivia Tzintzun-Camacho Tecnológico Nacional de México-Campus Tuxtla Gutiérrez Tuxtla Gutiérrez03940México Instituto de Ciencias Agrícolas de la universidad Autónoma de baja california Mexicali21705México Instituto de Ingeniería de la universidad Autónoma de baja california Mexicali21100México Facultad de Medicina de la universidad Autónoma de baja california Mexicali21100México

The aim of this study was the synthesis of silver nanoparticle using Annona diversifolia *** silver nanoparticles obtained were analyzed by spectroscopic methods and dynamic light scattering *** inhibition of AgNPs was evaluated against Bacillus cereus,Klebsiella pneumoniae and Enterobacter *** results showed that AgNPs have high values at 3 keV and particle size between 45 to 58 nm with a homogenous *** AgNPs showed growth inhibition against Klebsiella pneumoniae and Enterobacter *** studies are needed to confirm the potential antimicrobial of different AgNP from *** in Gram negative and Gram positive bacteria.

关键词： Green chemistry AgNPs plants antimicrobial biotechnology

Green Synthesis of Bimetallic Nanoparticles From Prosopis juliflora(Sw)DC.,and Its Effect Against Cotton Mealybug,Phenacoccus solenopsis(Hemiptera:Pseudococcidae)

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Phyton-International Journal of Experimental Botany 2019年第3期88卷 269-275页

作者： V.Mendez-Trujillo B.Valdez-Salas M.Carrillo-Beltran M.A.Curiel-Alvarez O.Tzintzun-Camacho C.Ceceña-Duran D.Gonzalez-Mendoza Facultad de Medicina de la universidad Autónoma de baja california Dr.Humberto Torres Sanginés S/NCentro Cívico21000MexicaliBaja CaliforniaMéxico Instituto de Ingeniería de la universidad Autónoma de baja california Calle de la Normal S/N y Boulevard Benito Juárez21100MexicaliBaja CaliforniaMéxico Instituto de Ciencias Agrícolas de la universidad Autónoma de baja california(ICA-UABC).Carretera a delta S/N C.P.21705 Ejido Nuevo LeónBaja CaliforniaMéxico

Phenacoccus solenopsis has been recognized as an aggressively invasive species on cotton plants in different *** study was conducted to investigate the effect of green synthesized Cu/Zn-nanoparticles using aqueous leaf extract of Prosopis juliflora(mezquite)against *** scanning electron microscope(SEM)showed bimetallic nanoparticles of Cu/Zn-NPs with spherical shape with varying size of 74.33 nm to 59.46 *** than 30%mortality of *** was observed with Cu/Zn-nanoparticles(100 ppm)at 96 hours after *** mortality of *** was recorded with Cu/Zn solution(100 ppm)and aqueous *** *** results of the viability test for Cu/Zn-nanoparticles of *** showed a significant reduction of the cell viability by 50%in insect exposed to Cu/*** studies about nanotoxicity of Cu/Zn-NPs of *** are needed to reveal the mechanism of toxicity this phytonanoparticles in ***.

关键词： Photosynthesis biocontrol cotton mealybug nanoinsecticide

General noise support vector regression with non-constant uncertainty intervals for solar radiation prediction

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Journal of Modern Power Systems and Clean Energy 2018年第2期6卷 268-280页

作者： J.PRADA J.R.DORRONSORO universidad autonoma de Madrid

General noise cost functions have been recently proposed for support vector regression(SVR). When applied to tasks whose underlying noise distribution is similar to the one assumed for the cost function, these models should perform better than classical -SVR. On the other hand, uncertainty estimates for SVR have received a somewhat limited attention in the literature until now and still have unaddressed problems. Keeping this in mind,three main goals are addressed here. First, we propose a framework that uses a combination of general noise SVR models with naive online R minimization algorithm(NORMA) as optimization method, and then gives nonconstant error intervals dependent upon input data aided by the use of clustering techniques. We give theoretical details required to implement this framework for Laplace, Gaussian, Beta, Weibull and Marshall–Olkin generalized exponential distributions. Second, we test the proposed framework in two real-world regression problems using data of two public competitions about solar energy. Results show the validity of our models and an improvement over classical -SVR. Finally, in accordance with the principle of reproducible research, we make sure that data and model implementations used for the experiments are easily and publicly accessible.

关键词： Support vector regression General noise model Naive online R minimization algorithm(NORMA) Uncertainty intervals Clustering Solar energy Reproducible research

An Approximation to the Cruise Tourist Profile in Los Cabos,Mexico

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Journal of Tourism and Hospitality Management 2018年第1期6卷 9-16页

作者： Hassir Lastre Sierra Placido Roberto Cruz Chávez Judith Juarez Mancilla universidad autonoma de baja california Sur Mexico

In order to offer a range of tourism products and services,it is necessary to identify and build the profile of the tourists who visit a certain destination,thus satisfying their tastes and *** accordance with the above,and through a descriptive and exploratory study,quantitative information was collected,which is necessary to characterize the cruise tourist who visits the tourist destination of Los *** show that 70%of tourists visit the destination as a way to rest and 13%to discover new *** this research exercise,it is pertinent to note that the strategies or actions that are established should tend to increase the economic benefit without leaving aside the experience and satisfaction of the tourist.

关键词： profile of the tourist cruises tourism Los Cabos

Influence of Data Clouds Fusion From 3D RealTime Vision System on Robotic Group dead Reckoning in Unknown Terrain

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 368-385页

作者： Mykhailo Ivanov Oleg Sergyienko Vera Tyrsa Lars Lindner Wendy Flores-Fuentes Julio Cesar Rodriguez-Quinonez Wilmar Hernandez Paolo Mercorelli universidad Autónoma de baja california MexicaliB.C.21100Mexico universidad de Las Américas Quito 170125Equador Leuphana University of Lueneburg Lüneburg 21335Germany

This paper proposes the solution of tasks set required for autonomous robotic group behavior optimization during the mission on a distributed area in a cluttered hazardous *** navigation scheme uses the benefits of the original real-time technical vision system(TVS)based on a dynamic triangulation *** method uses TVS output data with fuzzy logic rules processing for resolution *** on previous researches,the dynamic communication network model is modified to implement the propagation of information with a feedback method for more stable data exchange inside the robotic *** to the comparative analysis of approximation methods,in this paper authors are proposing to use two-steps post-processing path planning aiming to get a smooth and energy-saving *** article provides a wide range of studies and computational experiment results for different scenarios for evaluation of common cloud point influence on robotic motion planning.

关键词： Data transfer group behavior machine vision navigation robotic group(RG) vision system

Challenges of Public Management to Consolidate the Gulf of Morrosquillo as a Competitive Tourism destination

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Journal of Tourism and Hospitality Management 2017年第6期5卷 215-222页

作者： Hassir Lastre Sierra Placido R. Cruz Chavez universidad autonoma de baja california Sur Mexico

The theoretical discourse focuses on unscrambling the differences between public management and private management, while new tools and techniques have been provided by recent trends in public management. This paper centers on a critical analysis and what the purpose of the government＇s management is; which refers to consolidate the Gulf of Morrosquillo （Colombia） as a competitive tourism destination for it to be as relevant as any other tourism destinations. Even though public management never stops, it is imperative for the governance to delineate the appropriate development path of a region to guarantee the correct conditions for it to be promoted properly. Methodologically speaking, this paper was started with the revision of the literature about the macro-environment related to touristic activities and an instrument was used to collect the information, which was designed to gather data about the lodging establishments. It is necessary to raise the awareness of the public management of the different municipalities that form the Gulf of Morrosquillo for them to acknowledge their weaknesses so that they will be able to formulate the appropriate programs to improve the estate of the destination.

关键词： public management competitiveness development and tourism destination