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Degradation of nucleic acids and nucleotides in several conditions with perspectives of retrieval: A review

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Advances in Bioscience and Biotechnology 2014年第1期5卷 36-39页

作者： José Martínez Reyes Lenin Ejecatl Medina Orozco Melitón Estrada Jaramillo iván vera romero Agustina Ortiz Soriano Trajectory of Educational Innovation University of the Ciénega of Michoacán State Sahuayo Méxio Trajectory of Energy Engineering University of the Ciénega of Michoacán State Sahuayo Méxio Trajectory of Food Genomics University of the Ciénega of Mi-choacán State Sahuayo Méxio

Deoxyribonucleic acid (DnA) or oligonucleotides, can be modified in several ways as chemical degradation by electrophilic reaction, attack of radicals, hydrolytic deamination or oxidative damage caused by ionizing radiation. This work discussed these degradation mechanisms, determining the effects on these biomolecules. The actual knowledge about DnA damages only permits partial enzymatic repair treatments.

关键词： DnA Chemical Degradation

Biogas Estimation as a Basis for the Implementation of an Intermunicipal Landfill: Michoacan, Mexico

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Journal of Environmental Protection 2014年第7期5卷 577-582页

作者： iván vera-romero José Martínez Reyes Claudio C. Espíritu-Barragán Melitón Estrada-Jaramillo Agustina Ortiz-Soriano Lenin E. Medina-Orozco Trajectory of Educational Innovation University of the Cienega of Michoacan State Sahuayo Mexico Trajectory of Energy Engineering University of the Cienega of Michoacan State Sahuayo Mexico Trajectory of Food Genomics University of the Cienega of Michoacan State Sahuayo Mexico

Municipal solid waste (MSW) generated in the municipalities of Sahuayo, Jiquilpan and Venustiano Carranza in Michoacan, is deposited in open dumps becoming hot spots for health and the environment. The total population in the three municipalities is 130,497 habitants, with a per capita waste production estimated in 0.718 kg·hab-1·day-1 (34,203 t·yr-1). The aim of this study was to estimate the formation of biogas for power generation from the decomposition of waste. The model used was the mexican model of biogas (version 2.0), assuming a useful life of 21 years of the landfill at a cost of 0.19 USD per kWh, the average CFE rate for municipal public lighting. Four possible scenarios were evaluated: one optimal recovering 68% of the biogas (10,095 tonnes of methane in 20 years), having a savings concept in electricity of 8,015,252 USD;in the second case (optimistic intermediate), it is assumed that it obtains 61% of biogas (9046 tonnes of methane) with benefits in power generation for 7,159,679 USD;the third case (pessimistic intermediate) estimating 48% of biogas recovered, being captured 7118 tonnes of methane with profits of 5,633,846 USD into electrical energy, the latter case (pessimistic), assuming 40% of biogas recovered, transforming 4672 tonnes of methane resultant in an economic benefit of 3,697,324 USD for electricity generation. The results justify the investment of the landfill and it is a measure to mitigate climate change and disease prevention.

关键词： Municipal Street Lighting Alternative Energy Public Health

Wheat genotypic variability in grain yield and carbon isotope discrimination under Mediterranean conditions assessed by spectral reflectance

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Journal of Integrative Plant Biology 2014年第5期56卷 470-479页

作者： Gustavo A. Lobos iván Matus Alejandra Rodriguez Sebastián romero-Bravo José Luis Araus Alejandro del Pozo Plant Breeding and Phenomic Center Faculty of Agricultural Sciences University of Talca CRI-Quilamapu Agricultural Research Institute Plant Physiology Department Faculty of Biology University of Barcelona

A collection of 368 advanced lines and cultivars of spring wheat（Triticum aestivum L.） from Chile, Uruguay, and CIMMYT（Centro Internacional de Mejoramiento de Maíz y Trigo）, with good agronomic characteristics were evaluated under the Mediterranean conditions of central Chile. Three different water regimes were assayed： severe water stress（SWS, rain fed）, mild water stress（MWS; one irrigation around booting）, and full irrigation（FI; four irrigations： at tillering,flag leaf appearance, heading, and middle grain filling）. Traits evaluated were grain yield（GY）, agronomical yield components,days from sowing to heading, carbon isotope discrimination（△^13C） in kernels, and canopy spectral reflectance. Correlation analyses were performed for 70 spectral reflectance indices（SRI） and the other traits evaluated in the three trials. GY and △^13C were the traits best correlated with SRI, particularly when these indices were measured during grain filling. However,only GY could be predicted using a single regression, with Researchnormalized Difference Moisture Index（nDMI2： 2,200; 1,100）having the best fit to the data for the three trials. For △^13C, only individual regressions could be forecast under FI（r^2： 0.25–0.37）and MWS（r^2： 0.45–0.59） but not under SWS（r^2： 0.03–0.09）.nIR‐based SRI proved to be better predictors than those that combine visible and nIR wavelengths.

关键词： Breeding drought dry matter index normalized difference moisture index vegetative index water index

Tourism versus nature conservation: reconciliation of common interests and objectives——an analysis through Picos de Europa national Park

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Journal of Mountain Science 2018年第11期15卷 2505-2516页

作者： LóPEZ iván PARDO Mercedes Department of Psychology and Sociology University of Zaragoza Department of Social Analysis University Carlos Ⅲ of Madrid

nature tourism and particularly tourism in national parks have acquired significant importance in contemporary societies. Post-Fordist consumers have reevaluated the meanings of ‘nature' and ‘natural spaces' and now avoid standardization to seek singularity. Tourism in national parks is a consequence of this tendency and has both positive and negative aspects. The purpose of this sociological research is to describe the most relevant conflicts in the Picos de Europa national Park(Spain) involving the park's conservation, local economic development,and tourism. Seven in-depth interviews and three focus groups were addressed to key local *** this research were identified three chief areas of existing or potential inter-related conflicts and the main actors interacting with them. The first is on population, particularly, the negative consequences of depopulations on the local socio-economic development and the environment. A second source of conflicts identified is caused by the difficult conciliation between commercial exploitation and conservation of the protected natural area. More precisely, this specific form of tourism positively contributes to the economy of local communities whilst problems can arise for the conservation goals of national Parks. Thirdly, in this research is also analyzed the institutional governance and the inter and intra-governmental conflicts as well as with the Park's management body. These findings provide important information for the improved management of tourism and conflicting interests in natural parks.

关键词： national parks Environmental conservation nature tourism Mountain traditional economy Picos de Europa Spain

nO-ARBITRAGE SYMMETRIES

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Acta Mathematica Scientia 2022年第4期42卷 1373-1402页

作者： iván DEGAnO Sebastián FERRAnDO Alfredo GOnZáLEZ Departamento de Matemática.Facultad de Ciencias Exactas y naturales Universidad Nacional de Mar del Plata 7600Argentina Department of Mathematics Ryerson University350 Victoria St.TorontoOntario M5B 2K3Canada

The no-arbitrage property is widely accepted to be a centerpiece of modern financial mathematics and could be considered to be a financial law applicable to a large class of(idealized) *** paper addresses the following basic question:can one characterize the class of transformations that leave the law of no-arbitrage invariant?We provide a geometric formalization of this question in a non probabilistic setting of discrete time-the so-called trajectorial *** paper then characterizes,in a local sense,the no-arbitrage symmetries and illustrates their meaning with a detailed *** context makes the result available to the stochastic setting as a special case.

关键词： no arbitrage symmetry convexity preserving maps non-probabilistic markets

Involvement of glucose transporter overexpression in the protection or damage after ischemic stroke

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neural Regeneration Research 2022年第4期17卷 783-784页

作者： iván Alquisiras-Burgos Penélope Aguilera Laboratorio de Patología Vascular Cerebral Instituto Nacional de Neurología y Neurocirugía Manuel Velasco SuárezInsurgentes Sur#3877Col.La FamaTlalpanCiudad de MéxicoMéxico

Cerebral ischemia and resultant energy collapse:The ischemic stroke is a complex neurological condition that can be devastating for patients and their *** disease is the second leading cause of death worldwide and is characterized by a sudden decrease in cerebral blood flow due to major blood vessel *** stroke generates two damaged zones with distinctive metabolic *** first is the ischemic core,the region directly irrigated by the occluded artery.A reduction to less than 20%of the baseline blood flow levels defines the area;therefore,depletion of glucose and adenosine triphosphate(ATP)cause an irreversible failure in the energy metabolism that leads to loss of ionic homeostasis,acidosis,and *** second is the region surrounding the ischemic core,called the penumbra,characterized by significantly depressed tissue perfusion that is barely sufficient to support basal oxygen,glucose,and ATP levels.

关键词： metabolism damage homeostasis

Addressing inclusion,innovation,and sustainability challenges through the lens of economic geography:Introducing the hierarchical regional innovation system

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Geography and Sustainability 2024年第1期5卷 1-12页

作者： iván Tartaruga Fernanda Sperotto Luís Carvalho Centre of Studies in Geography and Spatial Planning(CEGOT) Faculty of Arts and HumanitiesUniversity of PortoPorto 4150-564Portugal School of Economics and Management University of PortoPortoPortugal

The world is facing dramatic challenges related to environmental sustainability at an accelerating *** this context,the field of economic geography(EG)has been playing an important role in understanding both the socioeconomic and technological dimensions of these challenges,as it deals with a variety of complementary notions and *** from this lens,our aim is to explore a conceptual framework that can help us to understand environmental changes relating to multi-dimensional territorial development,notably in eco-nomic contexts where inequality is high,and stratification based on hierarchies regulate social and economic *** on the territory concept,we propose the original notion of a hierarchical regional innovation system(HRIS)that emphasises the pervasive role of hierarchies(powers)in regional innovation systems and illustrate its value with evidence and case studies from extant literature on sustainability *** HRIS can help us understand and promote development paths considering the contribution of inclusive eco-innovations(another original conceptual amalgam).Through some empirical cases from other studies in low-carbon transitions,we show the application of the HRIS(and inclusive eco-innovation)*** conclusion,we provide incen-tives to explore new regional innovation systems,alongside the HRIS,adapted to different regions worldwide and centred on the inclusiveness of people and places.

关键词： Inclusive eco-innovation Inclusive innovation Hierarchical regional innovation system(HRIS) Territorial development Sustainable development Sustainability transitions

What is the prognosis of emphysematous pyelonephritis associated with extended-spectrum beta-lactamases producing microorganisms?

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Asian Journal of Urology 2022年第2期9卷 146-151页

作者： Joséiván Robles-Torres Marco Alberto Ocaña-Munguía JoséGustavo Arrambide-Herrera Adrián Mauricio Martínez-Fernández Rodrigo romero-Mata Lauro Salvador Gómez-Guerra Urology Department Hospital Universitario"Dr.Jose´Eleuterio Gonza´lez"Universidad Auto´noma de Nuevo LeonMonterreyNuevo LeonMexico

Objective:To describe the microbiological characteristics in emphysematous pyelonephritis(EPn),demonstrate the frequency of extended-spectrum beta-lactamase(ESBL)microorganisms,and determine if these microorganisms are associated with the prognosis of patients with ***:We conducted a retrospective study in patients with a diagnosis of EPn in a tertiary care hospital of the northeast region of Mexico during the period from January 2011 to January *** variables were analyzed to determine association with the presence of ESBL-producing *** significance was set with pnts were included;55(87.3%)of them were females,with a median age of 55(interquartile range:45-65)*** management was indicated in 38.1%;42.9%were treated with ureteral stent;12.7%with open or percutaneous drainage;15.8%with early nephrectomy;and 9.5%with delayed *** mortality was 13(20.6%)cases;23(36.5%)cases required admission to the intensive care *** most frequent microorganism isolated was Escherichia coli(n=34,53.9%).ESBL microorganisms were found in 31.7%of the *** significant association of ESBL was found with admission to the intensive care unit,or with increased ***:To our knowledge,this is the first study that evaluates ESBL microorganisms as a prognostic factor in *** factors associated with a poor prognosis in patients with EPn have been *** microbiological factors,specifically ESBL-producing bacteria,do not seem to influence in the prognosis of these patients.

关键词： Emphysematous pyelonephritis Extended spectrum betalactamase Mortality Intensive care unit admission

Towards Fully Secure 5G Ultra-Low Latency Communications: A Cost-Security Functions Analysis

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Computers, Materials & Continua 2023年第1期74卷 855-880页

作者： Borja Bordel Ramón Alcarria Joaquin Chung Rajkumar Kettimuthu Tomás Robles iván Armuelles Universidad Politecnica de Madrid MadridEspana Argonne national Laboratory LemontILUSA Universidad de Panama PanamaPanama

Future components to enhance the basic,native security of 5G networks are either complex mechanisms whose impact in the requiring 5G communications are not considered,or lightweight solutions adapted to ultrareliable low-latency communications(URLLC)but whose security properties remain under *** different 5G network slices may have different requirements,in general,both visions seem to fall short at provisioning secure URLLC in the *** this work we address this challenge,by introducing cost-security functions as a method to evaluate the performance and adequacy of most developed and employed non-native enhanced security mechanisms in 5G *** categorize those new security components into different groups according to their purpose and deployment *** propose to analyze them in the context of existing 5G architectures using two different ***,using model checking techniques,we will evaluate the probability of an attacker to be successful against each security ***,using analytical models,we will analyze the impact of these security mechanisms in terms of delay,throughput consumption,and ***,we will combine both approaches using stochastic cost-security functions and the PRISM model checker to create a global *** results are first evidence of how a 5G network that covers and strengthened all security areas through enhanced,dedicated non-native mechanisms could only guarantee secure URLLC with a probability of∼55%.

关键词： 5G networks security analysis secure low latency communications URLLC eMBBC