oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 197 )

2018 ( 353 )

2017 ( 347 )

2016 ( 540 )

Custom range...

Search Results: 1 - 10 of 204700 matches for " Daniela LABRA-CARDóN "
All listed articles are free for downloading (OA Articles)
Page 1 /204700
Display every page Item
RESPUESTA DE CRECIMIENTO Y TOLERANCIA A METALES PESADOS DE Cyperus elegans Y Echinochloa polystachya INOCULADAS CON UNA RIZOBACTERIA AISLADA DE UN SUELO CONTAMINADO CON HIDROCARBUROS DERIVADOS DEL PETRóLEO
Daniela LABRA-CARDóN,Leonor Angélica GUERRERO-Zú?IGA,Aída Verónica RODRíGUEZ-TOVAR,Silvano MONTES-VILLAFáN
Revista internacional de contaminación ambiental , 2012,
Abstract: Se ha demostrado que las interacciones benéficas entre cultivos de plantas y bacterias son útiles en la disminución de la toxicidad producida por metales, así como en el aporte de nutrientes esenciales; por ello, las comunidades microbianas han sido empleadas para la biorremediación, en particular las rizobacterias promotoras del crecimiento (PGPR s por sus siglas en inglés). Este estudio evaluó la respuesta del crecimiento y la tolerancia a metales pesados de dos especies de plantas de pantano: Cyperus elegans y Echinochloa polystachya, inoculadas con una rizobacteria solubilizadora de fosfatos identificada como Bacillus sp. y expuestas a cadmio (Cd) y zinc (Zn). El crecimiento de ambas especies se favoreció en presencia de la rizobacteria; sin embargo, las plántulas crecidas con los metales e inoculadas con la rizobacteria, no mostraron diferencias significativas en las variables de crecimiento, lo que sugiere que su respuesta ante los metales está relacionada tanto con la dosis como con el tiempo de exposición, así como con la tolerancia intrínseca de estas especies. No obstante esto, la presencia de la rizobacteria mantuvo el crecimiento de las plántulas de C. elegans ante los metales pesados, lo que podría estar asociado con un efecto protector a las plántulas con la disminución de la toxicidad de ambos metales. Es importante enfatizar la importancia de la investigación sobre la colonización de las rizobacterias, no solamente en la espermosfera, sino también en las raíces de las plántulas inoculadas con el incremento de la superficie radical para la absorción de metales, así como con el papel protector de las rizobacterias contra la toxicidad de metales en el suelo, lo que permitirá establecer un mejor crecimiento y desarrollo de especies vegetales para la estabilización, la revegetación y la remediación de suelos contaminados con metales pesados.
ADE as Induction Therapy Results in Treatment of Children with Non-M3 High-Risk Acute Myeloid Leukemia, an Extrapolable Achievement in Developing Countries  [PDF]
Marta Zapata-Tarrés, Rocío Cárdenas-Cardós, Liliana Velasco-Hidalgo, Martín Pérez-García, Alberto Olaya-Vargas, Daniela Cárdenas-Pedraza, Roberto Rivera-Luna
Journal of Cancer Therapy (JCT) , 2016, DOI: 10.4236/jct.2016.73020
Abstract: Background: In Mexico, AML survival is referred in 30%. Our aim was to evaluate results with ADE protocol as induction treatment in children with non-M3 AML in a public Mexican institution. Method: We included patients with AML in a single institution between 2005 and 2013. All non-M3-AML patients received ADE as induction therapy (cytarabine 100 mg/m2 in continuous infusion from day 1 to 7, daunorrubicin 30 mg/m2 days 1, 3, 5 and etoposide 100 mg/m2 over days 1 to 5). Patients received antibiotic prophylaxis and strict scheduled appointments to assure adherence and prevent avoidable emergencies. Main Results: Eighteen patients were included. Median age was 106 months. One patient died at diagnosis so 17 were eligible for induction results analysis; eleven needed two cycles and six patients three. Remission rate was 100%. Analyzing non-M3 patients overall survival was 80.2% at 100 months. No fatal complications were observed. Stratifying by number of cycles we observe that patients receiving one ADE cycle had a 0% overall survival at short follow up, with 2 ADE cycles 80% at 100 months and with 3 cycles 100% at 60 months. Conclusion: ADE induction therapy showed improved results in overall survival compared with other standard regimens. Following the protocol we obtained 100% remission. This is an important achievement in our population. Our focus must be to ameliorate maintenance final results. These results should be reproduced in other hospitals in Mexico and other countries.
Rese a de "Transforma es sócioterritoriais nas metrópoles de Buenos Aires, S o Paulo e Santiago" de Sandra Lencioni, Sonia Vidal-Koppmann, Rodrigo Hidalgo y Paulo Cesar Xavier Pereira
César Labra N
Revista de Geografía, Norte Grande , 2011,
Abstract:
A NOTE ON QUASI n-MAPS
CORREA,IVáN; LABRA,ALICIA;
Proyecciones (Antofagasta) , 2004, DOI: 10.4067/S0716-09172004000100004
Abstract: using a factorization of quasi n-maps we find a relationship between the module formed by the n-maps and the module formed by the quasi n-maps. in particular, we characterize the quasi cubic forms using a relation called the parallelepiped law. moreover we give necessary and su.cient conditions for the equality of the modules of quasi cubic forms and cubic forms for any module m
A NOTE ON QUASI n-MAPS
IVáN CORREA,ALICIA LABRA
Proyecciones (Antofagasta) , 2004,
Abstract: Using a factorization of quasi n-maps we find a relationship between the module formed by the n-maps and the module formed by the quasi n-maps. In particular, we characterize the quasi cubic forms using a relation called the parallelepiped law. Moreover we give necessary and su.cient conditions for the equality of the modules of quasi cubic forms and cubic forms for any module M
The Global HIV Archive: Facilitating the Transition from Science to Practice of Efficacious HIV Prevention Interventions  [PDF]
Josefina J. Card, Emily N. Newman, Emily N. Newman, Rachel E. Golden, Tamara Kuhn, Carmela Lomonaco
World Journal of AIDS (WJA) , 2013, DOI: 10.4236/wja.2013.31007
Abstract:

This paper describes the development, content, and capabilities of the online Global HIV Archive (GHA). With the goal of facilitating widespread adaptation and appropriate use of efficacious HIV prevention programs throughout the globe, GHA has: 1) expanded and updated the search for HIV prevention programs originating in low-resource countries; 2) identified those meritorious HIV prevention programs meeting established efficacy criteria of technical merit, replicability, and positive outcomes; 3) prepared both implementation and evaluation materials from the efficacious programs for public use; 4) developed interactive wizards or capacity-building tools to facilitate appropriate program selection, implementation, and adaptation; 5) made the efficacious programs and accompanying wizards available to health practitioners throughout the globe in both printed and online formats.

The Psychology of the Overview Effect and Global Economic Ethics  [PDF]
Rutherford Card Johnson
Psychology (PSYCH) , 2018, DOI: 10.4236/psych.2018.97100
Abstract: The topic of ethics in economics, finance, and business certainly seems to be at the forefront of the news in recent times. Although ethical concerns are nothing new, efforts to change the culture of the economy have changed in recent times. Today both academia and the professional world, in part due to public demand, are seeking new ways to solve old problems stemming from ethical considerations. Some approaches focus on financial and regulatory incentives. Another approach is to change the underlying moral code of individuals and the business environment as a whole. In that way, ethical behaviour becomes part of an individual’s own code of conduct rather than a simple response to financial incentives. Such a change requires an internal philosophical shift within an individual. For it to have a wide-sweeping effect on the business and financial landscape, a critical number of individuals must experience such an internal shift. This study considers the landscape of ethics in the economics and then considers the cognitive shift process known as the Overview Effect, recently popularized in National Geographic’s new television series, One Strange Rock, as a means to provide insight into improving the ethical environment in economic.
Análisis no-lineal de la dinámica de enfermedades infecciosas en Chile
Canals L,Mauricio; Labra S,Fabián;
Revista médica de Chile , 1999, DOI: 10.4067/S0034-98871999000900008
Abstract: background: the incidence of infectious diseases generally has large fluctuations, probably due to interactions between seasonal fluctuations and those secondary to case-susceptible host interactions. aim: to analyze the complexity and attractant topological resemblance of seven infectious diseases in chile. material and methods: the annual incidence of measles, whooping cough, scarlet fever, meningococcal meningitis, diphtheria, typhoid fever and poliomyelitis was obtained from the annual reports of diseases. correlation dimensions and the largest lyapunov series exponents were estimated. the resemblance among their attractants was assessed by hausdorff distance. the measures were performed both before and after seasonal filtering. results: all series showed a dynamics near low dimensional chaos. the correlation dimensions ranged between 2.12 and 2.76. the correlation dimensions did not change after seasonal differentiation. apart from one, all disease dynamics had large lyapunov exponents, near 0.6 bits/year. these decreased if series were differentiated. before differentiation, the topological resemblance was mainly caused by the seasonal component of the dynamics but thereafter, the resemblance increased. in spite of different transmission mechanisms and etiologies, all analyzed infectious diseases conformed a truly single group, during cluster analyses. conclusions: these results suggest that beneath the dynamics of infectious diseases, obscured by seasonal environmental factors, lays a very consistent nonlinear agent-susceptible host dynamics.
Análisis no-lineal de la dinámica de enfermedades infecciosas en Chile Non linear analysis of the infectious disease dynamics in Chile
Mauricio Canals L,Fabián Labra S
Revista médica de Chile , 1999,
Abstract: Background: The incidence of infectious diseases generally has large fluctuations, probably due to interactions between seasonal fluctuations and those secondary to case-susceptible host interactions. Aim: To analyze the complexity and attractant topological resemblance of seven infectious diseases in Chile. Material and methods: The annual incidence of measles, whooping cough, scarlet fever, meningococcal meningitis, diphtheria, typhoid fever and poliomyelitis was obtained from the annual reports of diseases. Correlation dimensions and the largest Lyapunov series exponents were estimated. The resemblance among their attractants was assessed by Hausdorff distance. The measures were performed both before and after seasonal filtering. Results: All series showed a dynamics near low dimensional chaos. The correlation dimensions ranged between 2.12 and 2.76. The correlation dimensions did not change after seasonal differentiation. Apart from one, all disease dynamics had large Lyapunov exponents, near 0.6 Bits/year. These decreased if series were differentiated. Before differentiation, the topological resemblance was mainly caused by the seasonal component of the dynamics but thereafter, the resemblance increased. In spite of different transmission mechanisms and etiologies, all analyzed infectious diseases conformed a truly single group, during cluster analyses. Conclusions: These results suggest that beneath the dynamics of infectious diseases, obscured by seasonal environmental factors, lays a very consistent nonlinear agent-susceptible host dynamics.
Conjugate heat transfer in a two stage trapezoidal cavity stack
Aramayo,A.M.; Esteban,S.; Cardón,L.;
Latin American applied research , 2009,
Abstract: the flow pattern and heat transfer in a pair of cavities stacked one over the other, with a separating solid plate in between, are numerically studied. the configuration idealizes two trays in a multiple effect desalinator. the work focuses on the computational modeling of the two conjugate recirculations in the cavities, conductively coupled through the thin separating plate. the effect of the plate physical parameters, thickness and conductivity, on the heat transfer are also analyzed. plates made of glass, steel and aluminum of 2, 3, 4 and 6 mm are studied. cavity flow and temperature patterns, depicted by streamlines, velocity fields, and isotherms are analyzed for steady state. attention was paid to the temperature variation over, and heat flow through the separating plate. global nusselt numbers are calculated for the bottom side of the lower cavity. data are obtained for air as the working fluid (pr=0.7) in the range 103
Page 1 /204700
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.