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Microwave-ultrasound assisted extraction of red corn pigments and their effect on chemical composition and tecno-functional properties

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Food Bioscience 2022年第6期50卷 1111-1119页

作者： J.D.Garcia-Ortiz a.c.flores-gallegos J.A.Ascacio-Valdés c.M.López-Badillo S.D.Nery-flores S.c.Esparza-González R.Rodríguez-Herrera School of chemistry Autonomous University of CoahuilaCampus SaltilloSaltilloCoahuila25280Mexico School of Dentistry Autonomous University of CoahuilaCampus SaltilloSaltilloCoahuila25125Mexico

currently, there is a growing interest in obtaining natural pigments, without presenting a risk to health, as well as to the matrix and food safety. The objective of this study was to characterize grains with different shades of red color (High pigmentation maize = RA, Medium pigmentation maize = RM, and Low pigmentation maize = RB, reddish maize with white segments = VO and white maize control = Sc). The physical properties (kernel weight, length, width, thickness, and grain and flour color), chemical composition (moisture, fat, protein, fiber, starch, ash, and minerals), and techno-functional properties (capacity of absorption of organic molecules (OMAc), swelling (cH), oil retention (cAAc), and water absorption (WAS)) variables were measured. Afterward, RM was selected, and a pigment extraction (EAUM) was carried out using microwave-ultrasound equipment with different ratios of ethanol (0, 30, and 70%) and citric acid ratios (0 and 1%). The color and properties of the solid (starch, protein, fat, and their techno-functional properties) were determined in the aqueous phase and were compared with the properties prior to EAUM. The results indicated that the red grains have higher starch content (57.6%) and reddish colors, in addition, VO presented higher moisture (10.4%), fat (6.7%) and fiber (10.0%). The colors of the pigments obtained with EtOH (30 and 70%) show shades red and yellow. Finally, the EAUM decreased the fat content up to 57%, increased WAS and cAAc in the residual flour and generated changes in OMAc and cH, increasing in aqueous medium and reducing with EtOH.

关键词： Natural colorant Zea mays Green extraction Proximal analysis NIR Agronomic properties

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cytogenetical changes among Polyembryonic(PEm)and Non-PEm Maize Plants

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 87-97页

作者： A.A.Román-calzoncit F.Ramírez-Godina J.Sánchez-Laureano a.c.flores-gallegos J.Espinoza-Velázquez R.Rodríguez-Herrera School of chemistry Universidad Autónoma de Coahuila.Blvd.V.Carranza e Ing.JoséCárdenas V.s/n.Col.República Ote.C.P.25280.SaltilloCoahuilaMéxico Plant Breeding Department Universidad Autónoma Agraria Antonio NarroBlvd.Antonio Narro 1923BuenavistaSaltilloMéxico

Polyembryony in maize(PEm)contributes to improving the nutritional properties of the grain,as well as an increase in yield,since it generates multiple plants per seed,opening the possibility of developing new ***,it is unknown whether polyembryony in maize is the product of chromosomal *** on the above,in this research a cytogenetic study was proposed to verify if chromosomal abnormalities are related to the maize *** a meiotic study,maize genotypes with variable proportions of polyembryony(PEm),from the UA-IMM-BAP population and non-PEm(monoembryonic)maize were used,while for a mitosis analysis,30 families of maternal half-siblings(MHS)from two different populations with high polyembryony,denominated as BHP(brachytic,high polyembryony)and NHP(normal height,high polyembryony)were *** these genotypes were planted in the Buenavista Agricultural Experimental Station-UAAAN at Saltillo,coahuila,*** frequency of PEm was estimated in all *** was found that the polyembryony occurs at frequencies from 34 to 66%in the D-02,BHP group,and from 13 to 21%in the segregating groups of the G3-0202 and *** squash technique was used for both cytogenetic *** meiotic irregularities in maize chromosomes were detected,such as irregular association of 10%of chromosomes in metaphase 1,and agglomeration of chromatin in 100%of the *** addition,pollen viability was estimated by the staining technique with 1%acetocarmine dye,and it was found that the polyembryonic ones have pollen viability of 100%.In meiosis in prophase,I sub-phase diakinesis,ten pairs of bivalents were confirmed,confirming 2n=20,both in non-PEm and PEm maize,corroborating mating,and balanced segregation,without the presence of univalent or *** the chromosomal count carried out in cells in mitosis,only in the BHP-200 polyembryonic family was registered two out of twenty triploid *** condition of ploidy is atypical in

关键词： Zea mays irregular meiosis mitosis chromosomes chromatin polyploidy

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Ecological distribution and population structure of Litsea glaucescens(Lauraceae)in the ravines of Sierra Fría and Sierra Laurel,central Mexico

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Journal of Mountain Science 2022年第7期19卷 1945-1960页

作者： Mara Irais flores-gallegos Edmundo GARcIA-MOYA Angelica ROMERO-MANZANARES Mario LUNA-cAVAZOS Martin Alfonso MENDOZA-BRISENO Heike VIBRANS Posgrado en Botánica Colegio de PostgraduadosCampus Montecillo.Km 36.5carretera México-TexcocoMontecilloTexcocoEdo.de México56230México colegio de Postgraduados Campus Veracruz.Carretera Jalapa Veracruz Km 88.5Altamirano91690VeracruzMéxico

Litsea glaucescens Kunth(Mexican bay leaf,laurel)has a wide distribution in Mexico,growing at both riparian and rupicolous environments in the mountainous region of the central Highlands of the *** Fría-Sierra Laurel is a protected natural area covered by a dry *** Mexican bay leaf is associated with the oak forest,especially on *** species has been considered at risk in recent *** research is focused on analyzing the elements of the environment of the ravines,which are influencing the distribution and establishment of laurel populations in the *** mountainous regions of Aguascalientes were selected,Sierra Fría and Sierra *** ravines of the basin were selected to obtain environmental *** registered were topographic,edaphic,and *** component analysis was used to identify ecological factors associated with the presence of *** bay leaf populations were registered in 10 *** the structural level in the community,29 woody species were registered,Mexican bay leaf had an Importance Value Index of 15.8,ranking 10th among all *** of laurel were classified by size classes(S,individuals with heights ranging from 0 to 20 cm;S,heights ranging from 0.2 to 1.0 m;S,heights between 1 and 2 m with light trace of flowering;S,heights greater than 2 m with flowering greater than 30% of the canopy;and S,individuals with heights greater than 5 m,curved trunk and basal regrowth)to obtain the population *** importance index value for all the species in the riparian community was calculated to the community *** factors that characterized the presence of Mexican bay leaf were a high percentage of rock coverage(90%),less mulch depth,and sandy loam shallow *** that showed higher cation exchange capacity had a higher presence of individuals of the S,S,and Ssize *** Sindividuals were found in shady places with 97% of intercepted *** o

关键词： Dry Forest Ephemeral stream Importance Value Index Mexican bay leaf Population structure Principal component Analysis

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Genetic variability of Rhizoctonia solani Kühn and its resistance to fungicides

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Studies in Fungi 2020年第1期5卷 381-391页

作者： castillo RF gallegos G flores OA Aguilar Gc Rodriguez HR Hernandez cFD Saltillo Experimental Station Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias.Carr.Saltillo-Zacatecas km 342+119No.9515Col.ExHacienda de BuenavistaSaltilloCoah.C.P.25315 Department of Agricultural Parasitology Universidad Autónoma Agraria Antonio NarroBuenavista25315SaltilloCoahuilaMéxico Food Research Department School of Chemical SciencesUniversidad Autónoma de Coahuila25000SaltilloCoahuilaMexico

The aims of this study are to determine the population genetic structure of Rhizoctonia solani,associated with potato,and to assess its resistance degree to pencycuron and thiabendazole fungicides.A total of 57 strains of *** were isolated from different potato crop fields in Mexico,and were classified according to their anastomosis group(AG)using the polymerase chain reaction(PcR)and restriction fragment length polymorphism(RFLP)-based ***,the amplified fragments were digested with four different endonucleases(Mse I,Ava II,Mun I and Hinc II).The Repetitive Element Sequence-Based PcR(rep-PcR)technique was used to determine the genetic diversity in *** *** obtained by PcR-RFLP showed that 81%of the isolates were identified as belonging to AG-3 group,14%to AG1-1B and 5%to AG-11 *** response to fungicides inhibition,Ic_(50)between 0.014-0.039 mg a.i./L for pencycuron,and 0.82 to 2.91 for thiabendazole were determined,This Ic_(50)value showed that the resistance factor(RF)values ranged from 1.4 to 3.945 and 0.27 to 0.97,respectively;this tendency suggests that isolates are susceptible to *** AG groups showed a heterogeneous resistance to pencycuron and thiabendazole,being more tolerant to these fungicides AG1-1B and AG-11 *** genetic analysis shows a low genetic diversity among(P-value 0.3225)and within(P-value 0.3275)populations;this can indicate a clonal reproduction and little parasexual cycle among the analyzed isolations.

关键词： Anastomosis group genetic diversity genetic resistance Mexico PcR RFLP parasexual cycle REP PcR Wright’s statistics

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curvature effects on electric-double-layer capacitance

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chinese Journal of chemical Engineering 2021年第3期34卷 145-152页

作者： Jie Yang Alejandro gallegos cheng Lian Shengwei Deng Honglai Liu Jianzhong Wu State Key Laboratory of chemical Engineering and School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Department of chemical and Environmental Engineering University of CaliforniaRiversideCA 92521USA college of chemical Engineering Zhejiang University of TechnologyHangzhou 310014China

Understanding the microscopic structure and thermodynamic properties of electrode/electrolyte interfaces is central to the rational design of electric-double-layer capacitors(EDLcs).Whereas practical applications often entail electrodes with complicated pore structures,theoretical studies are mostly restricted to EDLcs of simple geometry such as planar or slit pores ignoring the curvature effects of the electrode *** gaps exist regarding the EDLc performance and the interfacial *** the classical density functional theory(cDFT)is used to study the capacitance and interfacial behavior of spherical electric double layers within a coarse-grained *** capacitive performance is associated with electrode curvature,surface potential,and electrolyte concentration and can be correlated with a regression-tree(RT)*** combination of cDFT with machine-learning methods provides a promising quantitative framework useful for the computational screening of porous electrodes and novel electrolytes.

关键词： Electric double layer Electrodes/electrolyte interface curvature effects classical density functional theory Machine learning

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An Autonomous Wall-climbing Robot for Inspection of Reinforced concrete Structures: SIRcAUR

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Journal of Artificial Intelligence and Technology 2021年第3期1卷 188-196页

作者： Gabriela gallegos Garrido Tariq Pervez Sattar London South Bank University London South Bank Innovation CentreGranta ParkGreat AbingtonCambridge CB216ALUK

A wall-climbing inspection robot has been designed to climb on safety-critical concrete structures by adhering to reinforcement steel bars(rebars)using permanent magnets to generate the adhesion *** and experimental validation have been performed to determine the optimum flux focusing magnet configurations with the robot operating on 30–35 mm of concrete cover over rebars arranged in different *** goal of adhesion force optimization is to be able to carry a ground-penetrating radar(GPR)sensor which detects rebar corrosion,concrete delamination,and concrete cover *** autonomous robot uses an ultra-wide band localization system and GPR data to control its motion trajectories to avoid regions where there is an insufficient density of *** testing(NDT)inspection data acquired by GPR are transmitted wirelessly to a ground station for processing and monitoring by NDT technicians.

关键词： climbing robot GPR NDT FEA magnetic adhesion reinforced concrete UWB

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Sustainability Analysis on Hydroelectric in Ecuador for Reinforcement of Hydropower Strategy

Sustainability Analysis on Hydroelectric in Ecuador for Rein...

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作者： Barbara Marisol gallegos Veintimilla 中国石油大学(北京)

学位级别：硕士

Sustainable Hydroelectric power plants in Ecuador have been the hope for many people on generating jobs and bringing big earnings to the country of Ecuador,in order to finance social programs focusing on reducing poverty and improve health and *** this point in time many plants are interested to be sustainable in all these key three aspects of economic,social and *** are a number of hydroelectric practices as an illustration we have Financing ability,operating performance rate,Production cost,Social Development,Employment,cultural heritage,Impact on the Soil,Impact on the Water,construction waste management,Solid common waste management and Solid non-common waste management therefore hydroelectric power plants can be able to achieve *** analysis presents an Analytical Hierarchy Process（AHP）model of hydroelectric sustainability through different hydroelectric power plant *** the first part of the methodology a survey was conducted from academia and industry,what followed was the development of the AHP *** this study is identified that San Francisco Hydroelectric power plant with a rank of 31% has the best practices in economic factors and the emblematic project coca codo Sinclair has the best in social with a rank of 38% and environmental factors with a rank of 38.1%,reaching in this way to a big part of the hopes the Ecuadorian people *** the contrary HidroSanBartolo and Oca?a were at the bottom of the ranking in the three aspescts of economic with a rank of 6.2%-5.7%,social with a rank of 3.6%-4.7% and environment with a rank of 4%-2.7%,*** research prioritization will help Hydropower strategy parameter development within the country of Ecuador.

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The Development of Sino-Ecuadorian Economic Relations——Based on the Perspective of comparative Analysis about Ecuadorian-Sino and Peru-Sino Economic Relations

The Development of Sino-Ecuadorian Economic Relations——Bas...

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作者： EGAS gallegos ANA BELéN 华东师范大学

学位级别：硕士

随着中国国际地位的提升,中国通过贸易和资本外流对拉丁美洲产生了重要影响。这些资本外流已经发展成基础设施、融资和外国直接投资项目。在拉丁美洲地区,厄瓜多尔是为了寻找替代发展的途径,而与中国建立起密切经济联系的国家之一。本... 详细信息

随着中国国际地位的提升,中国通过贸易和资本外流对拉丁美洲产生了重要影响。这些资本外流已经发展成基础设施、融资和外国直接投资项目。在拉丁美洲地区,厄瓜多尔是为了寻找替代发展的途径,而与中国建立起密切经济联系的国家之一。本文重点关注2007-2017年期间中厄发展情况,以深入探讨“与中国的双边关系对厄瓜多尔的发展有何贡献”这一问题。这项研究对于厄瓜多尔等拉美国家具有重要意义,使其明确能否依靠与中国的经济关系获得持续的发展。本文提供了中国对外贸易和对外直接投资的数据,对理论分析进行了概述,并对各国制定的政策、法律和战略进行了解释。为了验证和支撑研究中提出的论点,我将中国与秘鲁的经济关系作为对照,来改进厄瓜多尔的经济战略。之所以选择秘鲁,是因为他在现实中与厄瓜多尔有着很多相似的地方,而且与中国有着更高水平的经济合作。我的初步研究发现,厄瓜多尔必须提高其在地区合作中的参与度,促进互补性经济,实现工业经济的共同增长,以免成为仅仅依靠资源的国家。如果不能实现这一目标,像厄瓜多尔这样的小国将永远不能维护其有长期利益,与中国的经济联系也仅是一种依附关系。本研究也希望对理解在拉美的cOFDI做出贡献。

关键词：中国厄瓜多尔外国直接投资国际贸易秘鲁双边关系

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The effect of electrical current on lubricant film thickness in boundary and mixed lubrication contacts measured with ultrasound

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Friction 2024年第8期12卷 1882-1896页

作者： Julio A.cAO-ROMERO-gallegos Saeid TAGHIZADEH Oscar A.AGUILAR-ROSAS R.S.DWYER-JOYcE Leonardo I.FARFAN-cABRERA Tecnologico de Monterrey Escuela de Ingeniería y CienciasAve.Eugenio Garza Sada 2501MonterreyN.L.64849México Department of Mechanical Engineering Leonardo Centre for TribologyUniversity of SheffieldSheffield S13JDUK

This work explores experimentally the effects of Dc electrical currents on lubricant film thickness alteration in lubricated sliding steel contacts in the boundary and mixed regime as measured by *** experiments were performed in a two-electrode cell-based pin-on-disk tester instrumented with ultrasonic *** and electrified tribological tests were conducted on steel flat-on-flat contacts under various speeds and loads using both a mineral base oil and a gear *** thickness,coefficient of friction(coF),and electrical contact resistance(EcR)were measured during short experiments(30 s)in unelectrified and electrified(1.5 and 3 A)*** results suggest that film thickness,coF,and all EcR are altered by passing Dc currents through the *** particular,film thickness increased and decreased,respectively,by applying electricity at the different speeds and loads *** alterations were majorly ascribed to oil viscosity decrease by local heat and surface oxidation caused by electrical discharge and break down at the interface.

关键词： electrified sliding ultrasonic measurement electric vehicles pin-on-disk

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Bacteriocins as antimicrobial and preservative agents in food:Biosynthesis,separation and application

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Food Bioscience 2022年第2期46卷 749-771页

作者： Deepak Kumar Verma Mamta Thakur Smita Singh Soubhagya Tripathy Alok Kumar Gupta Deepika Baranwal Ami R.Patel Nihir Shah Gemilang Lara Utama Alaa Kareem Niamah M´onica L.ch´avez-Gonz´alez carolina flores gallegos cristobal Noe Aguilar Prem Prakash Srivastav Agricultural and Food Engineering Department Indian Institute of Technology KharagpurKharagpur721302West BengalIndia Department of Food Technology School of SciencesITM UniversityGwalior474001Madhya PradeshIndia Department of Nutrition and Dietetics University Institute of Applied Health SciencesChandigarh UniversityChandigarh140413PunjabIndia Division of Post-harvest Management ICAR-Central Institute for Subtropical Horticulture(Ministry of Agriculture and Farmers WelfareGovernment.of India)Lucknow(UP)226101India Department of Home Science Arya Mahila PG CollegeBanaras Hindu UniversityVaranasiUttar Pradesh221005India Division of Dairy Microbiology Mansinhbhai Institute of Dairy and Food Technology-MIDFTDudhsagar Dairy CampusMehsana384002GujaratIndia Faculty of Agro-Industrial Technology Universitas PadjadjaranSumedang45363Indonesia center for Environment and Sustainability Science Universitas PadjadjaranBandung40132Indonesia Department of Food Science College of AgricultureUniversity of BasrahBasra CityIraq Bioprocesses and Bioproducts Research Group and Nanobioscience Group.Food Research Department School of Chemistry.Autonomous University of CoahuilaSaltillo Campus25280CoahuilaMexico

Emerging evidence shows the trend of using safe and natural preservatives like bacteriocins in food *** increasing demand by the food industry to extend keeping quality and prevent spoilage of various food products has appealed for new preservatives and new methods of ***,to discover the novel spectrum of antimicrobial compounds that could effectively battle food-borne pathogens,bacteriocins have been intensively studied in the last few ***,great attention has been paid to the application of lactic acid-bacterial bacteriocins targeting food spoilage-causing or pathogenic microorganisms with no significant side *** mechanisms of action like pore-formation,retarding cell-wall/nucleic acid/protein synthesis have been proposed and described for diverse ***,the syntheses,purification of bacteriocins in addition to their applications as antimicrobial and preservative agents in food processing are reviewed in *** review will also discuss the preservative effect of bacteriocins and their combinations having multiple modes of action(hurdle approach)to reduce the microbial load as well as antimicrobial resistance.

关键词： Lactic acid bacteria Bacteriocins Preservative Food-borne pathogens Food processing

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