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Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía M.López Baptista K.Watanabe T.Taniguchi E.Diez j.E.Velázquez-Pérez Y.M.Meziani j.M.Caridad j.A.delgado-Notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de Excelencia en Luz y Materia Estructurada(LUMES) University of Salamanca37008 SalamancaSpain Research Center for Electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFETs)have demonstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and *** features are essential to enable emerging THz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFET *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasmonic

Simplicial Indicator Kriging

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journal of China University of Geosciences 2008年第1期19卷 65-71页

作者： R Tolosana-delgado V Pawlowsky-Glahn j j Egozcue Department of Sedimentology and Environmental Geology Georg-August-Universitt Gttingen D-37077 Gttingen Germany Department of Computer Science and Applied Mathematics University of Girona Girona Spain Department of Applied Mathematics III Universidad Politécnica de Catalunya Barcelona Spain

Indicator kriging （IK） is a spatial interpolation technique devised for estimating a conditional cumulative distribution function at an unsampled location. The result is a discrete approximation, and its corresponding estimated probability density function can be viewed as a composition in the simplex. This fact suggested a compositional approach to IK which, by construction, avoids all its standard drawbacks （negative predictions, not-ordered or larger than one）. Here, a simple algorithm to develop the procedure is presented.

关键词： Aitchison geometry compositional data disjunctive kriging log-ratio approach simplex.

On the Structure of Graded Leibniz Algebras

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Algebra Colloquium 2015年第1期22卷 83-96页

作者： Antonio j. Calderon Martin jose M. Sfinchez delgado Departamento de Matemdticas Universidad de Cadiz 11510 Puerto Real Cadiz Spain

We study the structure of graded Leibniz algebras with arbitrary dimension and over an arbitrary base field K. We show that any of such algebras ￡ with a symmetric G-support is of the form ￡ = U-∑jIj with U a subspace of ￡1, the homogeneous component associated to the unit element 1 in G, and any Ij a well described graded ideal of ￡, satisfying [Ij, Ik]= 0 if j≠ k. In the case of ￡ being of maximal length, we characterize the gr-simplicity of the algebra in terms of connections in the support of the grading.

关键词： graded Leibniz algebra infinite dimensional Leibniz algebra structure theory

Generalized Baumslag-Solitar Graphs with Soluble Fundamental Groups

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Algebra Colloquium 2014年第1期21卷 53-58页

作者： Alberto L. delgado Derek j.S. Robinson Mathew Timm vDepartment of Mathematics illinois State University Normal IL 61790 USA Department of Mathematics University of Illinois at Urbana-Champaign Urbana IL 61801 USA Department of Mathematics Bradley University Peoria IL 61625 USA

It is shown that the generalized Baumslag-Solitar graphs which have soluble fundamental groups can be constructed from four simple types of graph by a process of decoration. The method of proof is elementary and emplo... 详细信息

关键词： generalized Baumslag-Solitar graph soluble fundamental group

Modified activated carbon with interconnected fibrils of iron-oxyhydroxides using Mn^(2+) as morphology regulator, for a superior arsenic removal from water

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journal of Environmental Sciences 2019年第2期31卷 403-414页

作者： Cesar Nieto-delgado joel Gutiérrez-Martínez j.Rene Rangel-Méndez Environmental Sciences Division Potosino Institute of Scientific and Technological ResearchIPICyT

The arsenic removal efficiency of iron-modified activated carbons depends greatly on the number of available iron oxide surface sites, which are given by the surface area of the anchored particles. In this sense, aiming the generation of an adsorbent with superior arsenic adsorption capacity, we developed a protocol to anchor interconnected fibrils of iron oxyhydroxides, using Mn^(2+) as a morphology regulator. The protocol was based on a microwave-assisted hydrothermal method, using bituminous based activated carbon and both Fe^(2+) and Mn^(2+) ions in the hydrolysis solution. The elemental analysis of modified carbons revealed that Mn does not anchor to the carbon. However, when Mn is included in the hydrolysis solution, the iron content in the activated carbon increased up to 3.5 wt%,without considerable decreasing the adsorbent surface area. Under specific hydrothermal conditions, the Mn^(2+) promoted the formation of iron oxide nanoparticles shaped as interconnected fibrils. This material showed a superior arsenic adsorption capacity in comparison to similar iron modified activated carbons(5 mg As/g carbon, at 2 mg As/L),attributed to the increase in quantity and availability of active sites located on the novel interconnected fibrils of iron oxyhydroxides nanostructures.

关键词： Iron oxide nanostructures Hydrothermal synthesis Microwave Adsorption capacity Kinetics

The Effect of Glandless Cottonseed Meal Content and Process Parameters on the Functional Properties of Snacks during Extrusion Cooking

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Food and Nutrition Sciences 2012年第12期3卷 1716-1725页

作者： Damian Reyes-jáquez Favio Casillas Nancy Flores Isaac Andrade-gonzález Aquiles Solís-Soto Hiram Medrano-Roldán Francisco Carrete Efren delgado Graduate School of Biochemical Engineering Technological Institute of DurangoDurangoMéxico Extension Food Technology New Mexico State UniversityLas CrucesUSA Technological Institute of Tlajomulco lajomulco de ZúnigaMéxico Faculty of Veterinary Juarez State University of DurangoDurangoMéxico

The results of the present study indicate that glandless cottonseed meal (CSM) can be incorporated in extruded corn flour snacks at a 10% content level, which increases snack protein content to 12.8% and reduce fat content to 6.2%. To improve snacks’ nutritional quality, CSM and corn flour were extruded using a simple screw extruder. An expansion index (EI) ranging of 1.2 - 4.7 was obtained. Penetration force (PF) was 7 - 9 times harder than other extruded products. High extrusion temperature and high CSM concentrations decreased (p p p< 0.05) extrudates’ water solubility index. Extrusion conditions used showed a 68.5% starch gelatinization, and a starch availability of more than 97%, which explains the high expansion index obtained.

关键词： Cottonseed Meal Extruded Snack Functional Properties

New environmental factors related to diabetes risk in humans:Emerging bisphenols used in synthesis of plastics

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World journal of Diabetes 2023年第8期14卷 1301-1313页

作者： Rafael Moreno-Gómez-Toledano María delgado-Marín Alberto Cook-Calvete Claudia gonzález-Cucharero Nunzio Alcharani Beatriz jiménez-Guirado Ignacio Hernandez Rafael Ramirez-Carracedo Laura Tesoro Laura Botana Sandra Sánchez-Esteban javier Diez-Mata jose Luis Zamorano Ricardo j.Bosch Carlos Zaragoza Marta Saura Universidad de Alcalá Department of Biological Systems/PhysiologyAlcaláde Henares 28871Spain Cardiology Department University Hospital Ramón y CajalMadrid 28034Spain Laboratory of Cardiovascular Pathophysiology Joint Translational Research UnitUniversity Francisco de Vitoria School of MedicineMadrid 28034Spain Instituto Ramón y Cajal de Investigación Sanitaria-IRYCIS Madrid 28034Spain

BACKGROUND Diabetes mellitus(DM)is one of the largest global health emergencies of the 21st *** recent years,its connection with environmental pollutants,such as bisphenol A(BPA),has been demonstrated;consequently,new structurally similar molecules are used to replace BPA in the plastics industry(BPS,BPF and BPAF).AIM To carry out a systematic review to allow coherent evaluation of the state of the ***,a meta-analysis was performed to unify the existing quantitative *** Firstly,a systematic review was carried out,using the terms“(bisphenol)AND(Diabetes OR Hyperglycemia)”,to maximize the number of ***,three authors analyzed the set of ***,a meta-analysis was performed for each BP,using RevMan *** addition,funnel plots were developed to study publication *** The systematic analysis of the literature revealed 13 recent articles(2017–2023)related to the study *** qualitative analysis showed interesting data linking diabetes to the three most widely used substitute BPs in the industry:BPS,BPF and ***,the meta-analysis determined a positive relationship with BPS,BPF and BPAF,which was only statistically significant with *** There is a need to apply the precautionary principle,regulating the use of new ***,replacing BPA with BPS,BPF or BPAF is unlikely to protect the population from potential health risks,such as DM.

关键词： Bisphenol S Bisphenol F Bisphenol AF Diabetes mellitus Systematic review Meta-analysis

Functional genomic approach to the study of biodiversitywithin Trichoderma

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浙江大学学报(农业与生命科学版) 2004年第4期30卷 453-453页

作者： Monte E Hermosa M R gonzález F j Rey M Cardoza R E Gutiérrez S delgado jarana j Llobell A Centro. Hispano-Luso de Investigaciones Agrarias University of Salamanca Plaza Doctores de la Reina s/n 37007 Salamanca Spain Newbiotechnic S.A. (NBT) Seville Spain University of León Campus of Ponferrada Superior and Technical Universitary School of Agricultural Engineers 24400 Ponferrada. Spain IBVF Isla de la Cartuja CSIC/University of Seville Seville Spain

Trichoderma is a fungal genus of great and demonstrable biotechnological value, but its genome is poorly surveyed compared with other model microorganisms. Due to their ubiquity and rapid substrate colonization, Trichoderma species have been widely used as biocontrol organisms for agriculture, and their enzyme systems are widely used in industry. Therefore, there is a clear interest to explore beyond the phenotype to exploit the underlying genetic systems using functional genomics tools. The great diversity of species within the Trichoderma genus, the absence of optimized systems for its exploration, and the great variety of genes expressed under a wide range of ambient conditions are the main challenges to consider when starting a comprehensive functional genomics study. An initial project started by three Spanish groups has been extended into the project TRICHOEST, funded by the EU (FP5, QLRT-2001-02032) to target the transcriptome analysis of selected Trichoderma strains with biocontrol potential, in conditions related to antagonism, nutrient stress and plant interactions. Once specific conditions were defined, cDNA libraries were produced and used for EST sequencing. Nine strains from seven Trichoderma species have been considered in this study and an important amount of gene sequence data has been generated, analyzed and used to compare the gene expression in different strains. In parallel to sequencing, genomic expression studies were carried out by means of macro-arrays to identify genes expressed in specific conditions. In silico analysis of DNA sequencing data together with macro-array expression results have lead to a selection based on the potential use of the gene sequences. The selected clone sequences were completed and cloned in appropriate vectors to initiate functional analysis by means of expression studies in homologous and heterologous systems.

关键词： functional genomics proteomics Trichoest

Moving beyond Wastewater:Perspectives on Environmental Surveillance of Infectious Diseases for Public Health Action in Low-Resource Settings

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Environment & Health 2024年第10期2卷 684-687页

作者： jeseth delgado Vela Sarah E.Philo joe Brown Mami Taniuchi Molly Cantrell Alexandra Kossik Maya Ramaswamy Sitara SR Ajjampur Fatma Z.Guerfali Rochelle H.Holm john Scott Meschke Maria Catherine B.Otero Amy j.Pickering Mahbubur Rahman Alexander G.Shaw Abhilasha Shrestha Kwanrawee Sirikanchana Vivi Maketa Tevuzula Rolf U.Halden Alexandria B.Boehm Kyle Bibby Department of Civil and Environmental Engineering Duke UniversityDurhamNorth Carolina 27710United States Department of Civil and Environmental Engineering and Earth Sciences University of Notre DameSouth BendIndiana 46556United States Department of Civil and Environmental Engineering University of Southern California Los AngelesCA 90007USA Department of Environmental Sciences and Engineering University of North Carolina at Chapel HillChapel HillNorth Carolina 27599United States Division of Infectious Diseases and International Health University of VirginiaCharlottesvilleVirginia 22903United States Waterborne Disease Prevention Branch U.S.Centers for Disease ControlAtlantaGeorgia 30329United States The Wellcome Trust Research Laboratory Christian Medical CollegeVellore 632004India Laboratory of Transmission Control and Immunobiology of Infections(LTCII)Institut Pasteur de TunisTunis-Belvédère 1002Tunisia UniversitéTunis El Manar Tunis 1002Tunisia Christina Lee Brown Envirome Institute School of MedicineUniversity of LouisvilleLouisvilleKentucky 40202United States Department of Environmental and Occupational Health Sciences School of Public HealthUniversity of WashingtonSeattleWashington 98195United States College of Medicine University of the Philippines ManilaManila 2801Philippines Department of Civil and Environmental Engineering University of CaliforniaBerkeleyBerkeleyCalifornia 94720United States Institute of Epidemiology Disease Control and Research(IEDCR)Dhaka 1212Bangladesh Department of Infectious Disease Epidemiology Imperial College LondonLondon SW72AZU.K. Division of Environmental and Occupational Health Sciences University of Illinois Chicago School of Public HealthChicagoIllinois 60612United States Research Laboratory of Biotechnology Chulabhorn Research InstituteBangkok 10210Thailand Department of Tropical Medicine University of KinshasaKinshasa/DR 63090201Congo School of Sustainable Engineering and the Built Environment Arizona State UniversityTempe

Although testing wastewater for public health surveillance has recently received significant attention in the United States,researchers and public health professionals have long realized the tremendous promise of environmental surveillance(ES),defined as tracking pathogens of interest in fecally contaminated surface waters,soil,or fomites,in low-resource settings for public health action.1,2 The power of ES in lowresource settings is most clearly illustrated with the over 30 years of well-established and standardized polio *** part of the Global Polio Eradication Initiative,the World Health Organization(WHO)has accredited 146 laboratories within the Global Polio Lab Network(GPLN).These facilities across 92 countries process over 8,000 wastewater or fecally contaminated surface water samples per year,in addition to over 220,000 stool samples annually.3 The data generated from the GPLN are closely linked to clear public health action related to targeted vaccination *** investment and adoption of ES for polio eradication efforts serves as a use-case for other targets of *** explore the current state of the field,the National Science Foundation-funded Research Coordination Network(RCN)on Wastewater Based Epidemiology for SARS-CoV-2 and Emerging Public Health Threats held a workshop in December 2023 to discuss the opportunities and challenges for ES in low-resource settings(Figure 1).Discussions during the workshop highlighted knowledge gaps,best-practices,target selection,academic/government/private partnerships and overall public health action and sustainability of these programs.

关键词： wastewater Wastewater annually