Search | SciELO

Need help?

Add field +

Search history

No documents were found for your search

Results: 21

au:"Alvarez, A."

Filters

Collection + Options

All
Chile

5
Mexico

5
Brazil

3
Argentina

2
South Africa

2
Colombia

1
Cuba

1
Spain

1
Venezuela

1

Journal + Options

All
Revista mexicana de física

3
Revista médica de Chile

3
Journal of the South African Institution of Civil Engineering

2
Agricultura Técnica

1
Agrociencia

1
Anales del Sistema Sanitario de Navarra

1
Arquivo Brasileiro de Medicina Veterinária e Zootecnia

1
Brazilian Journal of Medical and Biological Research

1
Cuban Journal of Agricultural Science

1
Ingeniería e Investigación

1
Revista Chapingo serie ciencias forestales y del ambiente

1
Revista Estudos Feministas

1
Revista argentina de reumatología

1
Revista chilena de nutrición

1
Revista de Ciencia y Tecnología

1

Show all...

Language

All
Portuguese

2

Publication Year + Options

All
2019

4
2002

3
2004

2
2012

2
2013

2
1999

1
2001

1
2003

1
2007

1
2008

1
2011

1
2017

1
2022

1

SciELO Thematic Areas + Options

All
Health Sciences

7
Agricultural Sciences

5
Engineering

4
Exact and Earth Sciences

3
Biological Sciences

2
Human Sciences

1

WoS Subject Categories + Options

All
Multidisciplinary

7
Medicine

4
Engineering

3
General

3
Internal

3
Physics

3
Agriculture

2
Civil

2
Agronomy

1
Animal

1
Biology

1
Dairy

1
Dietetics

1
Disciplines

1
Education

1

Show all...

WoS Citation Index + Options

All
Science Citation Index Expanded

14
Social Sciences Citation Index

1

Citables and non citables

All
Citable

21

Type of Literature + Options

All
Article

19
Brief report

1
Case report

1

Order by

Page of 2 Next

Select this page

Print | Send to email | Export |

Facebook
Twitter
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

0 Selected itens

List all
Erase all

Neumonía lipoidea exógena y anorexia nerviosa: caso clínico
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Rodríguez-Sanz, J

; Arellano-Alvarez, A

; Ferrando-Lamana, L

; Martín-Carpi, T

Anales del Sistema Sanitario de Navarra

Journal Metrics
- Sobre o periódico
- SciELO Analytics

aug 2022, Volume 45 N. 2 elocation e1007

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Resumen La neumonía lipoidea exógena es una entidad infrecuente y con una presentación clínica inespecífica. Su diagnóstico temprano es clave para prevenir la fibrosis pulmonar que produce su cronificación. Presentamos el proceso diagnóstico de una paciente de 51 años, con clínica de tos con expectoración amarillenta, sin síntomas de infección ni fiebre, de larga evolución. En la tomografía axial computarizada se observaron infiltrados pulmonares bilaterales de tipo alveolar. Se realizó un lavado broncoalveolar en el que se obtuvo un material amarillento de origen desconocido, que no permitió alcanzar ninguna conclusión clara. La criobiopsia pulmonar fue la prueba clave que llevó al diagnóstico de neumonía lipoidea exógena, en probable relación con la anorexia con hábito purgativo que la paciente sufría de forma crónica. Hallado el origen del problema, la paciente se encuentra actualmente en proceso de recuperación y cambio de hábitos, sin tos ni expectoración.

Abstract Exogenous lipoid pneumonia is a rare entity with non-specific clinical presentation. Early diagnosis is key to prevent pulmonary fibrosis in cases of chronic exogenous lipoid pneumonia. Here, we present the diagnostic process in a 51-year-old female with chronic cough and yellow sputum, no fever nor signs of infection. The computerized axial tomography scan showed alveolar infiltrates in both lungs. We performed a bronchoalveolar lavage and collected a yellowish material, but no clear result were obtained from its analysis. Cryobiopsy of lung tissue was key for the diagnosis of exogenous lipoid pneumonia . This may be related to the chronic anorexia nervosa that the patient suffers, associated with purgative habits. After identifying the cause of the symptoms, the patient is recovering, changing her habits, and has no cough nor sputum.

https://doi.org/10.23938/assn.1007

Productivity, chemical composition and in situ ruminal degradation kinetics of Morus alba at diferent regrowth ages
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Torres-Navarrete, E.

; Sánchez-Laiño, A.

; Espinoza-Guerra, Í.

; Barrera-Alvarez, A.

; Verdecia, D.M.

; Ramírez, J.L.

; Herrera, R.S.

Cuban Journal of Agricultural Science

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2019, Volume 53 N. 4 Pages 447 - 457

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

ABSTRACT Using a random block design and four replications with six treatments consisting on regrowth ages (30, 45, 60, 75, 90 and 105 days), their biomass production, dry matter, chemical composition and in situ ruminal degradation kinetics of Morus alba, was evaluated in la María, Los Ríos, Ecuador. It was sampled in plots of 1,200 m2, in which a uniformity cut was applied at 0.5 m high over the soil level, without using irrigation or fertilization. Edible biomass, DMY, DM, CP, NDF, ADF and OM were determined, as well as in situ ruminal degradation kinetics (DM, NDF and OM). There were increases of dry matter and edible biomass production of 1.77 and 0.45 t/ha-1, respectively, as well as 7.5, 11.21 and 18.28 percent units for DM, NDF and ADF, while there was a decrease for CP and OM of 4.99 and 8.44 percent units, respectively up to 105 days. For degradation kinetics of dry matter, the best results were obtained at 30 days with 81.24%, 7.08%, 0.41%/h, 88.32%, 66.06%, 63.78%, and 61.51% for soluble fraction (a), potentially degradable (b), degradation rate (c), potential degradability (a+b) and effective degradability at ruminal passage rate of 2, 5 and 8 %, respectively. This same performance was maintained for OM and NDF. It can be concluded that regression equations were established, which explain the close relation among age, edible biomass production and dry matter. Dry matter and crude protein values were lower than those reported for this species in the international literature for production systems in tropical areas. These differences could be attributed to the zero use of irrigation and fertilization during the research. It is important to highlight that soluble fraction, potential and effective degradation of DM, OM and NDF were maintained with values superior to 50%. Further studies are suggested in other periods of the year, cut height, phytochemical composition, intake tests and animal response.

RESUMEN Mediante un diseño de bloques al azar y cuatro réplicas con seis tratamientos que consistieron en las edades de rebrote (30, 45, 60, 75, 90 y 105 días), se evaluó su efecto en la producción de biomasa, materia seca, composición química y cinética de la degradabilidad ruminal in situ de Morus alba, en la María, Los Ríos, Ecuador. Se muestreó en parcelas de 1200 m2, a la cual se aplicó el corte de uniformidad a 0.5 m de altura sobre el nivel del suelo y no se empleó riego ni fertilización. Se determinaron biomasa comestible, RMS, MS, PB, FDN, FDA y MO, así como la cinética degradación ruminal in situ (MS, FDN, MO). Hubo incrementos de la producción de biomasa comestible y materia seca de 1.77 y 0.45 t/ha-1, así como 7.5, 11.21 y 18.28 unidades porcentuales para la MS, FDN y FDA, mientras que para la PB y MO hubo disminución de 4.99 y 8.44 unidades porcentuales, respectivamente hasta los 105 días. Para la cinética de degradación de la materia seca los mejores resultados se obtuvieron a los 30 días con 81.24%, 7,08%, 0.41%/h, 88.32%, 66.06%, 63.78% y 61.51% para la fracción soluble (a), potencialmente degradable (b), tasa de degradación (c), degradabilidad potencial (a+b) y la efectiva a tasa de paso ruminal (2, 5 y 8%), respectivamente. Este mismo comportamiento se mantuvo para la MO y FDN. Se concluye que se establecieron ecuaciones de regresión que explican la estrecha relación que existe entre la edad, la producción de biomasa comestible y materia seca. Los valores de materia seca y proteína bruta están por debajo de los reportados para la especie en la literatura internacional para los sistemas de producción en el trópico, diferencias que pudieran ser atribuibles al no empleo de riego y fertilización durante la investigación. Vale destacar que la fracción soluble, degradación potencial y efectiva de la MS, MO y FDN se mantuvieron con valores superiores al 50%. Se sugiere realizar estudios en otros períodos del año, altura de corte, composición fitoquímica, pruebas de consumo y respuesta animal.

Thermal performance comparison of recycled and clay roof tiles due heat radiation by digital holographic interferometry
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Sánchez-Alvarez, A.

; Torre Ibarra, M.H. De la

; Mendoza Santoyo, F.

Revista mexicana de física

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2019, Volume 65 N. 6 Pages 678 - 683

Abstract: En | Text: En | PDF: En

Abstract It is through the recycling process that disposed waste materials could regain a new purpose on their use, take for instance the tetrapakTM packaging. This material consists of thermally joint layers of paper, aluminum, and polyethylene. Once recycled, the two latter materials form a new composite named poly-aluminum, which is employed to manufacture roof tiles that serve as environmental protection against solar radiation and rain. This work reports an optical nondestructive comparison study of the surface deformation in poly-aluminum and clay roof tiles exposed to heat radiation. The optical system, based on a sensitive out-of-plane interferometer configuration, records several image holograms from a controlled heat source that raises the temperature on the tile's surface. The retrieved optical phase renders the tiles surface's deformation at three different temperature values: 26, 36 and 46 degrees on a Celsius scale. The results show a greater deformation profile from the poly-aluminum tile compared with the classic clay tile. However, its thermal insulation properties are better than those of the clay roof tile.

https://doi.org/10.31349/revmexfis.65.678 341 downloads

Análisis morfométrico y merístico de larvas de Lycengrauliss grossidens (Agassiz, 1829) (Clupeiformes, Engraulidae) en el área de infuencia del embalse de Yacyretá
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Briñoccoli, Y.F.

; Alvarez, A.

; Garrido, G.G.

Revista de Ciencia y Tecnología

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2019, N. 31 Pages 1 - 10

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Lycengraulis grossidens (river anchovy) presents abundant records of larval stages in the reservoir of the Yacyreta Dam. The aim of this work is to characterize the different larval stages of this species morphometrically and meristelly, to increase the database size and facilitate the taxonomic identification. Samples were collected from three sampling stations: Ituzaingó, Garapé and Itatí, located in the province of Corrientes (Argentina) during September 2015 to February 2016. Three larval stages were recognized and basic morphometric and meristic measurements were taken. The meristic characters allow us to distinguish the different stages of this species, but not the morphometric characteristics, which are similar in the first stages. Data of the larval stages are scarce so this work would contribute to the existing database in Argentina.

Lycengraulis grossidens (anchoíta de río) presenta abundantes registros de estadíos larvales en el embalse de Yacyretá. El objetivo de este trabajo es caracterizar morfométrica y merísticamente los diferentes estadíos larvales de esta especie, para aumentar la base de datos disponible y facilitar la identificación taxonómica. Se tomaron muestras de tres estaciones de muestreo: Ituzaingó, Garapé e Itatí, ubicadas en la provincia de Corrientes (República Argentina) durante el período septiembre 2015 a febrero 2016. Se reconocieron tres estadíos larvales y se tomaron medidas morfométricas y merísticas básicas. Los caracteres merísticos permiten distinguir los distintos estadíos en esta especie, no así las características morfométricas, que son similares en los primeros estadíos. Los datos de los estadíos larvales son escasos, por lo que este trabajo contribuiría a la base de datos existente en Argentina.

147 downloads

Sexto reporte de eventos adversos con tratamientos biológicos en Argentina: Informe del registro BIOBADASAR
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Gómez, G.

; Pons-Estel, G.

; Citera, G.

; Soriano, E.

; Saurit, V.

; Benavidez, F.

; Velozo, E.

; Dubinsky, D.

; Exeni, I.

; Gobi, C.

; Gómez, G.

; Díaz, M.

; Granel, A.

; Smichowsky, A.

; Garate, G.

; Quinteros, A.

; Cavillon, E.

; Petkovic, I.

; Larroude, M.S.

; de la Sota, M.

; Cappuccio, A.M.

; Berbotto, G.

; Alvarez, A.

; Papasidero, S.

; Lazaro, A.

; Garcia, M.

; Sacnun, M.

; Soares de Souza, S.

; Bertoli, A.

; Bejarano, V.

; Rillo, O.

; Kerzberg, E.

; Quintana, R.

; Agüero, S.

; Somma, L.

; Cruzat, V.

; Battaglitti, C.

; Perez Dávila, A.

; Gallardo, M.

; Pereira, D.

; Verando, M.

; Paira, S.

; Martinez, L.

; Aste, N.

; Pisoni, C.

; Catay, E.

; Graf, C.

; Casado, G.

; de la Vega, M.

Revista argentina de reumatología

Journal Metrics
- Sobre o periódico
- SciELO Analytics

mar 2019, Volume 30 N. 1 Pages 4 - 9

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Objective: Update the results of the BIOBADASAR registry on safety, duration and causes of treatment interruption after 8 years of follow-up. Methods: BIOBADASAR is a safety record of biological therapies established by the Argentine Society of Rheumatology. The description of BIOBADASAR 3.0 is presented, a cohort of 53 centers in Argentina followed prospectively from August 2010 to January 2018. Results: 4656 patients were registered, 6234 treatments [3765 cases (therapy with biologicals) and 2469 controls (non-biological therapy)]. Treatment was interrupted in 44.6% in cases vs. 27.9% in controls. Main cause of discontinuation was due to inefficiency (40% cases vs. 32% controls). There were 3154 adverse events (2230 in cases vs. 924 in controls), of which 13.6% were tombs (9.8% in cases and 3.7% in controls). The most frequent adverse event (AE) in both groups were infections (43.56% in cases vs. 34.31% in controls, RR: 3.42, 95% CI: 3.02-3.88), and the upper airway pathways (14.5%). Neoplasms were published in 78 cases versus 45 controls (RR: 1.98, 95% CI: 1.37-2.86). Conclusions: In this article, there are no different trends regarding safety, duration and causes of interruption of treatment compared to previous reports. Infections were the main causes of treatment discontinuation. The advent of new biological agents and the need for control over long-term security, strengthens the use of this type of registration.

Objetivo: Actualizar los resultados del registro BIOBADASAR sobre seguridad, duración y causas de interrupción del tratamiento luego de 8 años de seguimiento. Métodos: BIOBADASAR es un registro de seguridad de terapias biológicas establecido por la Sociedad Argentina de Reumatología. Se presenta la descripción de BIOBADASAR 3.0, una cohorte compuesta por 53 centros de Argentina seguidos prospectivamente desde agosto de 2010 hasta enero de 2018. Resultados: Se registraron 4656 pacientes, 6234 tratamientos [3765 casos (terapia con biológicos) y 2469 controles (terapia no biológicos)]. Se interrumpió el tratamiento en el 44,6% en los casos vs. 27,9% en los controles. Causa principal de discontinuación fue por ineficacia (40% casos vs. 32% controles). Se presentaron 3154 eventos adversos (2230 en casos vs. 924 en controles), de los cuales el 13,6% fueron graves (9,8% en casos y 3,7% en controles). El evento adverso (EA) más frecuente en ambos grupos fueron las infecciones (43,56% en casos vs. 34,31% en los controles, RR: 3,42; IC 95%: 3,02-3,88), y de ellas las de vías aéreas superiores (14,5%). Las neoplasias se presentaron en 78 casos vs. 45 en controles (RR: 1,98; IC 95%: 1,37-2,86). Conclusiones: En este sexto reporte no se observan tendencias diferentes sobre seguridad, duración y causas de interrupción del tratamiento respecto a informes previos. Las infecciones fueron el principal EA y la ineficacia, seguido por EA y la pérdida de pacientes las principales causas de suspensión del tratamiento. El advenimiento de nuevos agentes biológicos y la necesidad de control en seguridad a largo plazo, fortalece el uso de este tipo de registro.

197 downloads

Tasa de evapotranspiración del cultivo de la vid y su relación con la de referencia del método FAO Penman-Monteith
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Zermeño-González, Alejandro

; Melendres-Alvarez, A. Isain

; Fuerte-Mosqueda, L. Alberto

; Munguia-López, J. Plutarco

; Ibarra-Jiménez, Luis

Agrociencia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2017, Volume 51 N. 1 Pages 1 - 12

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Abstract Timely and adequate irrigation scheduling in agriculture requires information corresponding to the daily rate of crops ET established or to be established in different agricultural regions. Therefore, the objective of this study was to determine the daily rate of current ET (ETa) of the vine cultivation, from the reference ET (ETr) obtained with the FAO Penman Monteith method and its comparison with the crop ETa obtained with an eddy covariance system. We conducted the study in a vineyard of Vinícola San Lorenzo, Parras, Coahuila, during the production cycle of the vine (Vitis vinifera cv Shiraz) from April to September 2014. Within the vineyard we delimited two sections of 5.2 ha, and on each we installed eddy system sensors to obtain the daily rate of crop ET (ETa). Simultaneously, we continuously measured the total incident solar radiation, temperature and relative humidity and wind speed. With this information, we obtained the daily reference ET rate (ETr). The daily rate (ETa) of one of the sections of the vineyard was compared to the ETr to obtain the monthly adjustment coefficients of crop development (Kc). The study results showed that based on the Wilcoxon test for paired populations (p≤0.01), the daily rate of ETa measured in the vineyard (with the eddy covariance method) was equal to the Eta rate obtained from the ETr (with the FAO Penman Monteith procedure) corrected by the plant coverage ratio factor and the monthly coefficients (Kc) of crop development.

Resumen Una oportuna y adecuada programación del riego en la agricultura requiere información correspondiente a la tasa de ET diaria de los cultivos establecidos o por establecer en las diferentes regiones agrícolas. Por lo tanto, el objetivo de este estudio fue determinar la tasa diaria de ET actual (ETa) del cultivo de la vid, con la ET de referencia (ETr) obtenida con el método FAO Penman Monteith y su comparación con la ETa del cultivo obtenida con un sistema de covarianza eddy. El estudio se realizó en un viñedo de la Vinícola San Lorenzo, Parras, Coahuila, durante el ciclo de producción de la vid (Vitis vinífera cv Shiraz) de abril a septiembre de 2014. Dentro del predio se delimitaron dos secciones de 5.2 ha, y en cada una se instalaron los sensores de un sistema eddy para obtener la tasa diaria de ET actual del cultivo (ETa). Simultáneamente, se midió en forma continua la radiación solar total incidente, la temperatura y humedad relativa del aire y la velocidad del viento. Con esta información se obtuvo la tasa diaria de ET de referencia (ETr). La tasa diaria de ETa de una de las secciones del viñedo se comparó contra la ETr, para obtener los coeficientes mensuales de ajuste por desarrollo del cultivo (Kc). Los resultados del estudio mostraron que con base a la prueba de Wilcoxon para poblaciones pareadas (p≤0.01), la tasa diaria de ETa medida en el viñedo (con el método de la covarianza eddy) fue igual a la tasa de ETa obtenida desde la ETr (con el procedimiento FAO Penman Monteith) corregida por el factor de relación de cobertura y los coeficientes mensuales (Kc) de desarrollo del cultivo.

1806 downloads

Evaluating the effect of the number of generations in IBUN 91.2.98 Leuconostoc mesenteroides cultures on enzyme extract production
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Buitrago Hurtado, G

; Villamil Porras, W. A

; Vargas Sepúlveda, D. J

; Otálvaro Alvarez, A

; Flórez, G. Y

Ingeniería e Investigación

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2013, Volume 33 N. 1 Pages 66 - 70

Abstract: Es En | Text: Es En | PDF: Es | PDF: En

Por medio de este trabajo de investigación se estudió el efecto del número de generaciones de la cepa IBUN 91.2.98 de Leuconostoc mesenteroides sobre la producción de un complejo enzimático. Para ello se empleó la técnica de subcultivos en un medio diseñado específicamente para este microorganismo, con fines de producción de un complejo enzimático. La estabilidad se determinó, de manera indirecta, por medio del seguimiento del crecimiento del microorganismo y la medición de las actividades glucosiltransferasa e hidrolítica de un extracto enzimático obtenido del cultivo. En total se realizaron 40 subcultivos, correspondientes a 196 generaciones de Leuconostoc mesenteroides IBUN 91.2.98. Los resultados obtenidos permiten establecer que la mayor actividad del extracto enzimático (entre 4 y 6 U/mL) se alcanza al final de la fase exponencial del cultivo y que dicha actividad se mantiene estable durante los subcultivos, confirmando que hasta ese número de generaciones no se presenta una variación de la cepa en la producción del extracto enzimático, por lo que no constituye límite para escalar hasta 8.000 litros.

This work studied the effect of the number of generations of the IBUN 91.2.98 Leuconostoc mesenteroides strain on enzyme complex production. The subculturing technique was used on a medium which had been designed specifically for this organism for producing an enzyme complex. The effect was indirectly determined by monitoring microorganism growth and measuring the glucosyltransferase and hydrolytic activity of an enzyme extract obtained from such culture. There were 40 subcultures, representing 196 generations of IBUN 91.2.98 Leuconostoc mesenteroides. The results led to establishing that the extract's higher enzymatic activity (from 4 to 6 U/mL) was reached at the end of the culture's exponential phase and that this activity was stable during subculturing, confirming that there was no variation in strain regarding enzyme extract production until such number of generations had occurred, thereby not being limited to scaling-up to 8,000 litres.

987 downloads

Exploring the flow number (FN) index as a means to characterise the HMA permanent deformation response under FN testing
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Walubita, L F

; Zhang, J

; Alvarez, A E

; Hi, X

Journal of the South African Institution of Civil Engineering

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jan 2013, Volume 55 N. 3 Pages 103 - 112

Abstract: En | Text: En | PDF: En

Permanent deformation (PD), or rutting, is one of the common distresses occurring in hot-mix asphalt (HMA) pavements. As part of the HMA mix- and structural-design processes to optimise field performance, various laboratory tests, including the Hamburg wheel tracking test (HWTT) and flow number (FN), have been developed to characterise the HMA mix rutting resistance potential. With this background, this study was conducted to explore the potential of routinely using the FN test to characterise the PD response of Texas HMA mixes as a supplement to the HWTT. Towards this goal, a new PD parameter - the FN index - was developed to differentiate and screen the HMA mixes. The research methodology incorporated a two-phase approach, namely: (1) laboratory testing and (2) field correlations. Overall, the findings indicated that the FN index, computed from the FN test data, has the ability to statistically differentiate the HMA mixes evaluated, as well as promising potential to supplement the HWTT for routine HMA mix-design and screening. In addition, the FN test has a practically reasonable test time (about three hours per specimen) and is cost-effective. However, the inability to readily test thin field cores and the need for field validation with long-term performance data remain some of the key challenges to be addressed with the FN test method.

4908 downloads

Alteraciones en el gasto energético en reposo y parámetros respiratorios en pacientes con síndrome de Prader-Willi
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Fuchs-Tarlovsky, Vanessa

; Alvarez A, Karolina

; Sifuentes G, Evelyn

; Aleman G, Liliana

; Parra B, Marene

; Queipo G, Gloria

Revista chilena de nutrición

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2012, Volume 39 N. 4 Pages 159 - 163

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Introduction: Prader Willi Syndrome (PWS) is a complex genetic disorder with many manifestations relating to hypothalamic insufficiency. One such feature is obesity associated with an imbalance between caloric intake and expenditure due to hyperphagia and slow metabolic rate. Different procedures, as the use of appetite suppressants, surgical interventions and change in behavioral techniques have been used to try to limit food intake, but there is not convincing results about it. Aim: To compare the resting energy expenditure (REE) in PWS patients with obese patients without the syndrome matched by age and BMI (Body Mass Index). Subjects and methods: We conducted a comparative, observational and descriptive study in PWS and obese patients, matched for age, sex and BMI. RER was measured by indirect calorimerty and by anthropometry (BMI, skin-fold triceps and bíceps). A t-Student test for independent samples was used to demonstrate homogeneity between subjects and a series of ANCOVA analysis was performed on each of the parameters displayed by the indirect calorimetry. Results: Twenty mestizo-mexican patients, 10 with PWS and 10 with obesity were analyzed matched by age, BMI and gender. We found a statistically significant difference in the REE, the volume of oxygen (ml/min) and tidal volume (p <0.05). Conclusions: Prader Willy Syndrome per se produces changes in the REE in comparison with patients with only obesity.

Introducción: El síndrome de Prader Willi (SPW) es un trastorno genético complejo relacionado con insuficiencia hipotalámica. Una de las manifestaciones clínicas es la obesidad asociada a un desequilibrio entre la ingesta y el gasto energético, debido a la hiperfagia y a la baja tasa metabólica que presentan estos pacientes. Distintos procedimientos e intervenciones han sido utilizadas para tratar de limitar el consumo de alimentos, pero no hay resultados contundentes al respecto. Objetivo: Comparar el gasto energético en reposo (GER) de pacientes con SPW con pacientes obesos sin el Síndrome. Sujetos y métodos: Se realizó un estudio comparativo observacional, transversal y descriptivo en pacientes con SPW y pacientes obesos sin SPW pareados por edad, sexo e IMC. Se midió por medio de calorimetría indirecta el GER de los pacientes, así como por antropometría, IMC, pliegue cutáneo de tríceps y bíceps. Se utilizó una prueba T de Student para muestras independientes que comprobara la homogeneidad de los pacientes y se realizó una serie de análisis de ANCOVA sobre cada uno de los parámetros de la calorimetría indirecta. Resultados: Se analizó 20 pacientes mestizo-mexicanos entre 2 y 26 anos: 10 pacientes con SPW y 10 controles obesos. Se identificó una diferencia estadísticamente significativa en el GER, resultando 17.67% menor en los sujetos con SPW; así también en el volumen de oxígeno (mil/min) y volumen TIDAL (p < 0.05). Conclusión: Pacientes con SPW per se producen modificaciones en el GER a lo largo de la vida en comparación con los pacientes con obesidad.

6935 downloads

10.

Air void characterisation of HMA gyratory laboratory-moulded samples and field cores using X-ray computed tomography (X-ray CT)
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Walubita, L F

; Jamison, B

; Alvarez, A E

; Hu, X

; Mushota, C

Journal of the South African Institution of Civil Engineering

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2012, Volume 54 N. 1 Pages 22 - 30

Abstract: En | Text: En | PDF: En

The research work presented in this paper deals with the characterisation of the internal structure of hot-mix asphalt (HMA), incorporating both gyratory compacted samples produced in the laboratory and field cores. The primary objective was to determine the optimum trim depth on either end of laboratory-moulded HMA cylindrical samples that would optimise the air void (AV) uniformity in the test specimens. The analysis was based on the X-ray Computed Tomography (X-ray CT) scanning tests and subsequent image analyses. Two Texas HMA mixes, namely a coarse-graded (Type B) and a fine-graded (Type D) mix, with gyratory samples compacted in the laboratory to two different heights (110 and 164 mm) were evaluated for their internal structure in terms of the distribution of both the AV content and AV size. Analysis of the results indicated that the coarse-graded HMA mix (Type B) and the taller (164 mm in height) gyratory-moulded samples would be more likely associated with a more heterogeneous distribution of the AV content and AV size, respectively. Supplemented with field cores, the X-ray CT results indicated significantly poor AV content distribution (i.e. higher AV content and weakest area) at the ends, particularly in the top and bottom 20 mm zone of the samples. Thus, for 150 mm diameter samples of height equal to or greater than 110 mm, trimming a minimum of 20 mm on either side of the gyratory compacted samples should be given due consideration without compromising the specimen aspect ratio and NMAS coverage requirements (NMAS - nominal maximum aggregate size). In general, test specimens should always be cut from the middle zone of the SGC moulded samples where the AV is less heterogeneously distributed.

3813 downloads Cited 2 times in SciELO

11.

Coupled spinors orthonormalization criterion in multiband systems
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Mendoza-Alvarez, A.

; Flores-Godoy, J.J.

; Fernández-Anaya, G.

; Diago-Cisneros, L

Revista mexicana de física

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2011, Volume 57 N. 1 Pages 40 - 45

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Some fundamental physical quantities are determined by solving the eigenvalue problem that comes from a system of N coupled second order linear differential equations. An uncommon scenario evolves from the second order derivatives that appear in most multiband Hamiltonians, which leads to wave function spaces with non orthogonal axes. This notorious property has often been ignored by many authors. In this paper we discuss a possible criterion for the orthonormalization of eigenspinors (N × 1) derived from the eigenvalue quadratic problem associated to the differential equation system. Such eigenspinors are taken as the basis on which the propagating wave modes system is built. When the norm of the new space is reformulated, the non-standard character of the weighted internal product comes to the forefront. This scheme has been successfully applied to the study of hole tunneling as it is described by the (4 × 4) Kohn Luttinger model.

Varias magnitudes físicas fundamentales, son determinadas a través de la solución de problemas de autovalores, derivados de sistemas de N ecuaciones diferenciales lineales, acopladas y de segundo orden. Un escenario inusual, es el que evoluciona a partir de las derivadas de segundo orden, que aparecen, en la mayoría de los Hamilltonianos multibandas, lo cual conduce a espacios de Hilbert, de ejes no-ortogonales para la función de onda. Esta notoria propiedad, ha sido ignorada frecuentemente por muchos autores. En este artículo, discutimos un posible criterio de ortonormalización de los auto-espinores (N × 1), derivados del problema cuadrático de valores propios, asociado a la ecuación dianámica del sistema. Tales autoespinores, son tomados como base para expandir los modos propagantes a través de una heteroestructura. Cuando se reformula la norma del nuevo espacio, el cáracter no estándar del producto interno pesado -sobre el que descansa la nueva norma-, pasa a un primer plano. El presente esquema, ha sido aplicado con éxito, en el estudio del tunelaje de huecos, cuyo marco teórico es el modelo de dos bandas de Kohn-Luttinger (4 × 4).

719 downloads

12.

Vigilancia del riesgo de ocurrencia de incendios forestales mediante estaciones meteorológicas de superficie
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Domínguez-Hurtado, I. M.

; Moya-Alvarez, A. S.

; Estrada-Moreno, A.

Revista Chapingo serie ciencias forestales y del ambiente

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2008, Volume 14 N. 2 Pages 119 - 128

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

It is proposed a surveillance system to detect the risk of occurrence of forest fires on the basis of information from meteorological stations, due mainly to lack of operational daily departures to assess the conditions of risk of fires nationwide. Rates were used Nesterov amended and Monte Alegre, which were estimated from data from the 68 meteorological stations in Cuba. From that information is obtained mapificada daily output of each of them, using the technique of bicubic spline interpolation. We obtained an operating system for fully automated evaluation of the risk of occurrence of fires to Cuba, which has the potential to supplement and perfect the system for monitoring fires, based on reducing the time scale and the treatment of information.

Para la estimación del riesgo de ocurrencia de incendios forestales se emplean diferentes variantes a nivel mundial, en este trabajo se propone un sistema de vigilancia para la detección del riesgo de ocurrencia de incendios forestales a partir de la información procedente de estaciones meteorológicas de superficie, debido básicamente a la carencia de salidas operativas diarias que evaluarán las condiciones de riesgo de fuegos a nivel nacional. Se emplearon los índices de Nesterov modificado y Monte Alegre, los cuales se estimaron a partir de los datos procedentes de las 68 estaciones meteorológicas de Cuba. A partir de dicha información se obtiene la salida mapificada diaria de cada uno de ellos, mediante la utilización de la técnica de interpolación bicubic spline. Se obtuvo un sistema operativo totalmente automatizado para la evaluación de las condiciones de riesgo de ocurrencia de incendios para Cuba, el cual brinda la posibilidad de completar y perfeccionar el sistema de vigilancia de fuegos, basado en la reducción de la escala temporal y el tratamiento de la información.

1017 downloads

13.

Epidemiología clínica y molecular de las infecciones por Shigella spp en niños de la Región Metropolitana durante el verano 2004-2005
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Hamilton-West M, Christopher

; Prado J, Valeria

; Hormazábal O, Juan Carlos

; Lagos Z, Rosanna

; Benadof F, Dona

; Mendoza N, Carmen

; Elgueta N, Andrea

; Tapia P, Cecilia

; C¡fuentes D, Marcela

; Alvarez A, Isabel

; Hernández E, Mariluz

Revista médica de Chile

Journal Metrics
- Sobre o periódico
- SciELO Analytics

nov 2007, Volume 135 N. 11 Pages 1388 - 1396

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

Background: Shigella spp is a frequent cause of diarrhea in children. Antimicrobials decrease the duration of diarrhea and pathogen excretion. However, the increasing resistance limits their therapeutic value. Aim: To study Shigella serotype distribution in the Metropolitan Region in Chile, and its relationship with severity of disease, antimicrobial resistance pattern and clonality. Material and methods: During summer 2004-2005, stool samples from children with diarrhea were collected in Cary Blair transpon medium and cultured. Shigella isolates were serotyped using monoclonal and polyclonal commercial antibodies. In vitro activity of ampicillin, amoxicillin/clavulanic acid, chloramphenicol, cotrimoxazol, nalidixic acid, ciprofloxacin, ceftriaxone and azythromycin was determined by minimal inhibitory concentration (MIC). Clonality was studied by pulsed-field gel electrophoresis (PFGE) using Xbal as restriction enzyme. Results: One hundred thirty nine Shigella strains were isolated (77 S sonnei and 62 S flexneri). S sonnei and S flexneri 2a serotypes were responsible for 95% of episodes. Children aged 2-4 years, showed a greater incidence of Shigella infections and 77% of episodes were treated on an ambulatory basis. High resistance levels were observed for ampicillin, cotrimoxazole, amoxicillin-clavulanic acid and chloramphenicol (67%, 60%, 56% and 45%, respectively). We found 11 resistance patterns and 61,2% of strains were multiresistant. There were multiple clones without a strict relationship with resistance patterns. Conclusions: Shigella infections in Metropolitan Region in Chile are associated to a restricted number of serotypes, representing a clonal expansion associated to different antimicrobial resistant patterns

6779 downloads

14.

Prótese coxofemoral em cães: relato de dois casos
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Arias S., S.A.

; Rezende, C.M.F.

; Alvarez, A.

; Souza, M.V.

Arquivo Brasileiro de Medicina Veterinária e Zootecnia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

oct 2004, Volume 56 N. 5 Pages 618 - 622

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Foram realizadas duas cirurgias de prótese total da articulação coxofemoral em cão. Em um caso observou-se luxação caudal da prótese 72 horas após a cirurgia, que foi reduzida pelo método fechado, mantendo-se bandagem de Ehmer por 15 dias.O segundo caso evoluiu favoravelmente sem complicações pós-operatórias.Os dois pacientes foram avaliados periodicamente por 18 meses, mostrando desempenho clínico satisfatório, o que mostra a eficiência da técnica.

Two canine total hip replacements were performed. In one case, caudal luxation was observed 72 hours after the surgery, and it was treated by the closed reduction method, maintaining the Ehmer's sling for 15 days. The second case evoluted favourably without any postsurgical complication. Both patients were periodically evaluated during the 18 months that followed the surgery, showing a satisfactory clinical performance, that suggests the efficacy of the surgical technique.

13812 downloads

15.

Elongational properties and crystallization of poly (isobutylene) melts probed by synchrotron radiation
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Gonzalez-Alvarez, A.

; Arellano, M.

; Diat, O.

; Legrand, J.F.

; Piau, J.M.

Revista mexicana de física

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2004, Volume 50 N. 5 Pages 506 - 514

Abstract: En Es | Text: En Es | PDF: En | PDF: Es

In this paper, we describe a phase transition in poly(isobutylene) of various molecular weight under elongational stress. Rheometry and wide angle X-ray diffraction have been performed simultaneously to correlate mechanical and structural properties of the material. The low molecular weight samples did not crystallize under the flow in the range of the strain rates applied. On the other hand, as the molecular weight increases the crystallization is always preceded by a strain of the samples under stretching.

En este trabajo se describe la transición de fases de poliisobutileno de varios pesos moleculares sometidos a esfuerzos elongacionales. Experimentos de reometría y difracción de rayos X de ángulo amplio se realizan simultáneamente para correlacionar las propiedades mecánicas y la estructura del material. Muestras de polímero de bajo peso molecular no cristalizan en el intervalo de velocidades de deformación aplicadas. Al incrementar el peso molecular del polímero la cristalización obtenida es precedida por un endurecimiento del material debido a la deformación.

305 downloads

Showing

itens per page

Page of 2 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »