Search | SciELO

ABSTRACT Resistance to carbapenems is a public health problem. This study presents the identification of carbapenemase enzymes in Enterobacteriaceae, Pseudomonas spp. and Acinetobacter spp. present in strains from 30 institutions that provide health services in Peru as part of the quality control process in diagnoses. Phenotypic confirmation and enzymatic identification were performed using the Blue CARBA test and the synergy test with phenylboronic acid and ethylenediaminetetraacetic acid/sodium mercaptoacetic acid discs. 185 strains with carbapenemases were identified: 78 in Enterobacteriaceae, 61 in P. aeruginosa and 46 in Acinetobacter spp. The types of carbapenemases identified were: blaKPC, blaNDM, blaIMP, blaVIM, blaOXA-23, blaOXA-24, blaOXA-51 and the blaVIM/IMP co-production. It is important to strengthen the promotion of the rational use of antimicrobials and epidemiological surveillance in the country's hospitals.

RESUMEN La resistencia a los carbapenémicos es un problema de salud pública. Este estudio presenta la identificación de enzimas carbapenemasas en Enterobacteriaceae, Pseudomonas spp. y Acinetobacter spp. presentes en cepas de 30 instituciones prestadoras de servicios de salud del Perú como parte del proceso de control de calidad en diagnósticos. La confirmación fenotípica e identificación enzimática se realizó utilizando la prueba de Blue CARBA y la prueba de sinergia con discos de ácido fenilborónico y ácido etilendiaminotetraacético/ácido mercaptoacético de sodio. Se identificaron 185 cepas con carbapenemasas: 78 en Enterobacteriaceae, 61 en P. aeruginosa y 46 en Acinetobacter spp. Los tipos de carbapenemasas identificadas fueron: blaKPC, blaNDM, blaIMP, blaVIM, blaOXA-23, blaOXA-24, blaOXA-51 y la coproducción de blaVIM/IMP. Es importante reforzar la promoción del uso racional de antimicrobianos y la vigilancia epidemiológica en los nosocomios del país.

https://doi.org/10.17843/rpmesp.2021.381.5882

Caracterización molecular de carbapenemasas en el Perú durante el 2019
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Mayta-Barrios, Maritza Miriam

; Ramirez-Illescas, Juan José

; Pampa-Espinoza, Luis

; Yagui-Moscoso, Martin Javier Alfredo

Revista Peruana de Medicina Experimental y Salud Publica

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jan 2021, Volume 38 N. 1 Pages 113 - 118

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

https://doi.org/10.17843/rpmesp.2021.381.5882

Spatial changes in the infaunal community of a macrotidal flat in Bahía San Julián, Southern Patagonia, Argentina
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Martin, Juan P.

; Sar, Alicia

; Caminos, Carlos

Revista de biología marina y oceanografía

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2019, Volume 54 N. 1 Pages 51 - 69

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

Abstract. The soft-bottom macrobenthos of Bahía San Julián intertidal was surveyed to identify infaunal assemblages and analyze their relationships with the main environmental factors determining species distribution. Four seasonal surveys (summer, autumn, winter and spring) were performed in the middle and lower intertidal levels at seven sampling stations established on both sides of the sewage discharge point, and water and sediment variables were measured. To explore possible spatial variations in the community, environmental and biological data were analyzed using univariate and multivariate statistics. Community composition varied with intertidal level, sediment characteristics and distance to sewage discharge site. In sediment with high mud content, the community was characterized by Darina solenoides, Mysella patagona, Eteone sculpta, Scolecolepides uncinatus and Capitella sp., in the middle intertidal, and was characterized by M. patagona and Ampelisca sp. in the lower intertidal. In sediment with dominance of fine sand, the community was characterized by Aricidea sp. at both intertidal levels. Near the effluent discharge site, the community was largely dominated by M. patagona. Intertidal level and sediment particle size are the main factors determining the composition of benthic assemblages in the study area. Sewage discharge also affects the composition of the infaunal community, possibly as a result of the contribution of particulate organic matter in suspension that stimulates the populations of detritus feeders.

Resumen. El macrobentos intermareal de fondos blandos de Bahía San Julián fue estudiado para identificar las asociaciones infaunales y para analizar su relación con los principales factores ambientales que determinan la distribución de las especies. Se realizaron 4 muestreos estacionales (verano, otoño, invierno y primavera) en los niveles intermareales medio e inferior en 7 estaciones de muestreo establecidas a ambos lados de un sitio de descarga de efluentes urbanos, y se midieron variables del agua y del sedimento. Para explorar las posibles variaciones espaciales en la comunidad, se analizaron los datos ambientales y biológicos utilizando estadística univariada y multivariada. La composición de la comunidad varió con el nivel intermareal, las características del sedimento y la distancia al sitio de descarga de efluentes. En sedimento con alto contenido de fango, la comunidad estuvo caracterizada por Darina solenoides, Mysella patagona, Eteone sculpta, Scolecolepides uncinatus y Capitella sp., en el intermareal medio, y por M. patagona y Ampelisca sp. en el intermareal inferior. En sedimentos con predominio de arena fina, la comunidad estuvo caracterizada por Aricidea sp. en ambos niveles intermareales. Próximo al sitio de descarga de efluentes, la comunidad estuvo ampliamente dominada por M. patagona. El nivel intermareal y el tamaño de partícula del sedimento son los principales factores determinantes de la composición de las asociaciones bentónicas en el área de estudio. El vertido de efluentes también afecta la composición de la comunidad infaunal, posiblemente como resultado del aporte de materia orgánica particulada en suspensión, que estimula a las poblaciones de organismos detritívoros.

https://doi.org/10.22370/rbmo.2019.54.1.1494 295 downloads

Impacto clínico del desescalamiento a ertapenem en pacientes críticos con infecciones por Enterobacteriaceae
Facebook Twitter

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

Metrics
- SciELO Analytics

Cuesta, Diana P.

; Blanco, Victor M.

; Vallejo, Marta E.

; Hernández-Gómez, Cristhian

; Maya, Juan J.

; Motoa, Gabriel

; Correa, Adriana

; Matta, Lorena

; Rosso, Fernando

; Camargo, Ruben D.

; Muñoz, Martin

; Florez, Elizabeth

; Nagles, Jorge

; Ovalle, Amparo

; Reyes, Sergio

; Villegas, María V.

Revista chilena de infectología

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2019, Volume 36 N. 1 Pages 9 - 15

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

Background: Ertapenem has proven to be effective for extended-spectrum beta-lactamases-producing Enterobacteriaceae but lacks activity against non-fermenters; de-escalation to this antibiotic may reduce the selection of resistance to Pseudomonas aeruginosa and improve clinical outcomes. Aim: To evaluate the clinical impact of de-escalation from broad-spectrum anti-pseudomonal agents to ertapenem, a non-pseudomonal antibiotics for Enterobacteriaceae infections in critically-ill patients. Methods: We conducted a prospective cohort study in adult patients admitted to intensive care units (ICUs) who had Enterobacteriaceae infections and were de-escalated from empiric anti-pseudomonal coverage to non-pseudomonal antibiotics. Cox proportional hazards models were performed comparing all-cause mortality and length of hospital stay between patients who remained on anti-pseudomonal coverage versus those who were de-escalated to ertapenem. Results: 105 patients in the anti-pseudomonal group were compared to 148 patients in the ertapenem de-escalation group. De-escalation was associated with lower all-cause mortality compared to patients who remained on anti-pseudomonal coverage (adjusted Hazard Ratio 0.24; 95% CI: 0.12-0.46). The length of ICU stay was similar between the groups. Discussion: ICU patients with Enterobacteriaceae infections de-escalated to ertapenem therapy had better outcomes compared to patients who remained on broad-spectrum, anti-pseudomonal therapy, suggesting that de-escalation is a safe approach amongst ICU patients.

Resumen Introducción: Ertapenem ha demostrado eficacia frente a Enterobacteriaceae productoras de β-lactamasas de espectro extendido, pero carece de actividad contra bacterias no fermentadoras; el desescalamiento a este antimicrobiano cuando no existe la presencia de P. aeruginosa podría reducir la presión selectiva contra esta bacteria y mejorar los resultados clínicos. Objetivo: Evaluar el impacto clínico del desescalamiento de antimicrobianos con cobertura anti-pseudomonas a ertapenem, un agente sin este espectro, en pacientes críticos con infecciones por Enterobacteriaceae. Métodos: Se realizó un estudio de cohorte prospectivo en adultos admitidos a Unidades de Cuidado Intensivo (UCI) con infecciones por Enterobacteriaceae, que habían sido desescalados de una cobertura anti-pseudomonas, a un antimicrobiano sin la misma (ertapenem). Se realizó un modelo de riesgo proporcional de Cox comparando mortalidad por cualquier causa y duración de estancia hospitalaria entre aquellos pacientes que permanecieron con cobertura anti-pseudomonas versus aquellos que fueron desescalados a ertapenem. Resultados: 105 pacientes en el grupo anti-pseudomonas fueron comparados con 148 pacientes del grupo de desescalamiento a ertapenem. El desescalamiento estuvo asociado con una menor mortalidad por cualquier causa comparado con los pacientes que permanecieron con cobertura anti-pseudomonas (hazard ratio ajustado 0,24; IC 95%: 0,12-0,46). La estancia hospitalaria en UCI fue similar en ambos grupos. Discusión: Los pacientes de UCI con infecciones por Enterobacteriaceae desescalados a terapia con ertapenem, tuvieron mejores resultados clínicos comparados con aquellos que permanecieron en terapia anti-pseudomonas, sugiriendo que el desescalamiento es una práctica segura en esta población.

1002 downloads

Validation of an index of biological integrity based on aquatic macroinvertebrates assemblages in two subtropical basins of central Mexico
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Torres-Olvera, Martin J.

; Durán-Rodríguez, Omar Y.

; Torres-García, Ulises

; Pineda-López, Raúl

; Ramírez-Herrejón, Juan P.

Latin american journal of aquatic research

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2018, Volume 46 N. 5 Pages 945 - 960

Abstract: En | Text: En | PDF: En

ABSTRACT: The increasing degradation of freshwater ecosystems has demanded the development of methods that allow us to evaluate the ecosystem alterations. The Indexes of Biological Integrity (IBI) are a methodological approach to assess the condition of aquatic ecosystems. The objective of this study was to estimate the biological integrity and to validate the Index of Biological Integrity based on macroinvertebrate assemblages (IIBAMA) in 33 study sites rivers in the Lerma-Chapala and Pánuco river basins, in central Mexico. The Family-Level Biotic Index (FBI) was used to estimate the water quality and the Visual-Based Habitat Assessment (VBHA) was used to estimate the habitat quality. Spearman correlation analysis among IIBAMA, FBI, VBHA and water characteristics were made for validation of the IIBAMA. Besides, all variables were evaluated together by multivariate analyses. The rivers were classified in three of four biotic integrity categories, poor, regular and good, being poor the most common (88% of the study sites). We did not find study sites with excellent biotic integrity. The rivers of the Lerma-Chapala River Basin showed a worse ecological condition compare with the Pánuco Rivers Basin. We validated and recommended the using of the IIBAMA to assess the biological integrity of these two basins and rivers in central Mexico. This research represents the first efforts to validate an IBI based on aquatic invertebrate communities in a broad scale in Mexico and provide a general framework for their widespread use and to approach the validation and implementation of IBIs in other regions with similar conditions.

https://doi.org/10.3856/vol46-issue5-fulltext-8 8464 downloads

Asistencia circulatoria mecánica en pediatría: Experiencia en el Hospital de Pediatría Dr. Juan P. Garrahan. Argentina
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Moreno, Guillermo E.

; Magliola, Ricardo

; Pilán, María Luisa

; Althabe, María

; Balestrini, María

; Lenz, Ana Miriam

; Krysnki, Mariela

; Rodríguez, Ricardo

; Salgado, Gladys

; Martin, Analía

; Cardoso, Hugo

; Ruffa, Pablo

; Cornelis, Carlos Javier

; Barreta, Jorge

; García Delucis, Pablo

Archivos de cardiología de México

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2014, Volume 84 N. 4 Pages 256 - 261

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

Introduction: Mechanical circulatory support provides oxygen to the tissues in patients with cardiac and/or respiratory reversible disease refractory to conventional treatments. Objective: The aim of this study is to show our initial results of mechanical circulatory support in children with heart disease. Method: Retrospective cohort between March 2006 and March 2012. Demographic data (age, sex, weight, cardiac diagnosis), surgery (technique, pump, aortic cross clamping time) and mechanical circulatory support (type of assistance, indication, duration, complications and outcome) were collected. Results: Thirty-three patients were supported (1.3% of all surgeries), extracorporeal membrane oxygenation 32 cases and one ventricular assist device. The median age 7.4 months (one day-18 years) and weight 6 kg (2.3-75). The most frequent cardiac malformations supported were the transpositions of the great arteries associated with other anomalies and the corrected transpositions (ventricular inversion or double discordance). The most common reason for admission was post-cardiotomy biventricular dysfunction. Twenty-eight patients were supported in the postoperative period, 4 in the preoperative period and in one with myocarditis. Median days of support were 3 days (1-10). The most common complications were infection (21%), bleeding (21%). Elective decannulation was achieved in 94% of cases. Hospital discharge survival: 52%. Conclusions: The mechanical circulatory support in our institution is a safe and standard procedure. We have been using it in a small number of cases with a similar survival to that reported internationally. This complex procedure is widely justified because it allows for the recovery of more than half of the patients who otherwise would have died.

Introducción: La asistencia circulatoria mecánica permite aportar oxígeno a los tejidos en pacientes con enfermedades cardiacas y/o respiratorias reversibles refractarios a tratamientos convencionales. Objetivo: Mostrar los resultados iniciales de asistencia circulatoria mecánica en niños con cardiopatía en nuestra institución. Método: Estudio de cohorte descriptivo retrospectivo entre marzo de 2006 y marzo de 2012. Datos demográficos (edad, sexo, peso, diagnóstico cardiológico), de la cirugía (técnica, tiempo de bomba y de pinzamiento aórtico) y de la asistencia circulatoria mecánica (tipo, indicación, duración, complicaciones y evolución). Resultados: Fueron asistidos 33 pacientes (1.3% del total de cirugías), con oxigenación por membrana extracorpórea en 32 casos y un caso con dispositivo de asistencia ventricular. Mediana de edad 7.4 meses (un día-18 años) y peso 6 kg (2.3-75). Las malformaciones cardiacas que se asistieron con mayor frecuencia son las trasposiciones de grandes arterias asociadas a otras anomalías y las trasposiciones corregidas (inversión ventricular-doble discordancia). El motivo de ingreso más frecuente fue disfunción biventricular poscardiotomía. En 28 pacientes la asistencia circulatoria mecánica fue postoperatoria y en 4 preoperatoria. Un paciente presentó miocarditis. Mediana de asistencia 3 días (1-10). Complicaciones más frecuentes: infección el 21% y sangrado el 21%. Decanulación electiva en un 94% de los casos. Supervivencia con alta hospitalaria: 52%. Conclusiones: La asistencia circulatoria mecánica en nuestra institución es una herramienta segura con procedimiento estandarizado. Se utiliza en un reducido número de casos, con supervivencia similar a informes internacionales. Es un procedimiento complejo, plenamente justificado que permitió la recuperación en más de la mitad de los pacientes que de otro modo hubieran fallecido.

https://doi.org/10.1016/j.acmx.2013.12.009 1712 downloads

Incidence of dementia and association with APOE genotype in older Cubans
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Rodríguez, Juan J. Llibre

; Cepero, Adolfo Valhuerdi

; Gil, Isis Y. Sanchez

; Medina, Ana M. López

; Llibre-Guerra, Juan C.

; Llibre-Guerra, Jorge J.

; Teruel, Beatriz Marcheco

; Ferri, Cleusa P.

; Prince, Martin

Dementia & Neuropsychologia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2014, Volume 8 N. 4 Pages 356 - 363

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

OBJETIVO: Em uma população miscigenada de cubanos idosos, estimamos a incidência de demência e a associação entre o genótipo da APOE e os fatores de risco sociodemográficos na incidência de demência. MÉTODOS: Realizamos uma pesquisa de uma fase (linha de base) de todos os idosos com mais de 65 anos residentes em sete áreas de Cuba (n=2944), de 2003 a 2007. O diagnóstico de demência foi estabelecido de acordo com os critérios do DSM-IV e do 10/66. O genótipo APOE foi determinado em 2520 participantes. Avaliação da incidência foi conduzida 4,5 anos após a linha de base, a fim de estimar a incidência e associações com fatores de risco sociodemográficos e o genótipo APOE ε4. RESULTADOS: A taxa de incidência de demência foi de 9,0 por 1000 pessoas-ano (IC 95% 7,2-11,3) de acordo com o DSM-IV e de 20,5 por 1000 pessoas-ano (IC 95%, 17,6-23,5) de acordo com o 10/66. Idade avançada, história familiar de demência e genótipo APOE ε4 foram fatores de risco independentes para a incidência de demência de acordo com os critérios do 10/66. O genótipo APOE foi associado com a prevalência de demência em estudo transversal, mas o efeito sobre a incidência de demência foi atenuado, e apenas aparente entre aqueles na faixa etária mais jovem. CONCLUSÃO: A incidência de demência na população cubana mais velha é relativamente alta, semelhante às relatadas na Europa e América do Norte. O estudo mostra que a relação entre APOE ε4 incidente e demência é mais forte entre os idosos mais jovens e que esta alteração deve de ser considerada em modelos de demência.

OBJECTIVE: In an admixed population of older Cubans, the incidence and association of APOE and socio demographic risk factors with dementia incidence was estimated. METHODS: A single-phase survey (baseline) of all over 65-year-olds residing in seven catchment areas in Cuba (n=2944) was conducted between 2003 and 2007. Dementia diagnosis was established according to DSM-IV and 10/66 criteria. APOE genotype was determined in 2520 participants. An incidence wave was conducted 4.5 years after cohort inception in order to estimate incidence and associations with sociodemographic risk factors of the APOE ε4 genotype. RESULTS: The incidence rate of DSM IV dementia was 9.0 per 1000 person-years (95% CI 7.2-11.3) and of 10/66 dementia was 20.5 per 1000 person-years (95% CI, 17.6-23.5). Older age, a family history of dementia and APOE ε4 genotype were independent risk factors for incident 10/66 dementia. APOE genotype was associated cross-sectionally with dementia prevalence, but the effect on the incidence of dementia was attenuated, and only apparent among those in the youngest age group. CONCLUSION: The incidence of dementia in the older Cuban population is relatively high and similar to levels reported in Europe and North-America. The study showed that the relationship between APOE ε4 and incident dementia is stronger in the younger-old than the older-old and that this change must be taken into account in models of dementia.

https://doi.org/10.1590/S1980-57642014DN84000009 1182 downloads

The sea anemone Bunodactis octoradiata (Anthozoa: Actiniaria) from southern Patagonia: morphological study and new records
Facebook Twitter

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

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Garese, Agustín

; Longo, María V.

; Martin, Juan P.

; Acuña, Fabián H.

Zoologia (Curitiba)

Journal Metrics
- Sobre o periódico
- SciELO Analytics

oct 2014, Volume 31 N. 5 Pages 475 - 481

Abstract: En | Text: En | PDF: En

Bunodactis Verril, 1899 comprises at present 19 nominal species of sea anemones. The validity of the genus is under discussion. The description of the species, Bunodactis octoradiata Carlgren, 1899, is insufficient for reliable identification, and although subsequent works have provided additional information on the species, its description still needs to be complemented. Herein we describe B. octoradiata based on histological sections of the internal anatomy, and give a complete and detailed description of the external anatomy. The cnidom is composed of spirocysts, basitrichs and microbasic p-mastigophores; their distribution in the organism, sizes and relative abundances are provided. The presence of zooxanthellae is reported for the first time. Bunodactis octoradiata is distributed in groups that vary from 5.6 to 45 ind./m² in the field. Additionally, our data extends the distribution of the species along the coast of southern Patagonia (47°44'36"-49°15'13"S and 65°50'26"-67°39'45"W).

https://doi.org/10.1590/S1984-46702014000500007 2312 downloads

Estimación del intercambio neto de CO2 en un cultivo de caña de azúcar durante el ciclo de plantilla
Facebook Twitter

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

Metrics
- SciELO Analytics

Zermeño-González, Alejandro

; Villatoro-Moteno, Sandino

; Cortés-Bracho, J. Jesús

; Cadena-Zapata, Martin

; Catalán-Valencia, Ernesto A.

; García-Delgado, M. Ángel

; Munguía-López, Juan P.

Agrociencia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

sep 2012, Volume 46 N. 6 Pages 579 - 591

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

The sugarcane crop (Saccharum officinarum L.) contributes about two thirds of world sugar production. It is a C4 metabolism plant with high capacity for CO2 assimilation. The CO2 assimilation by the canopy of a crop can be determined by measuring the net exchange of CO2 between the ecosystem (vegetation and soil) and the atmosphere (NEE). In this study, we did NEE measurements of a sugarcane crop and compared them with the values reported for other plant species. We also analyzed the relationship of NEE with the rate of evapotranspiration (ET) and the photosynthetically active radiation (PAR) absorbed by the canopy. The crop instantaneous NEE rate was -28.23 µmol CO2 m-2 s-1 (the negative sign indicates that the net flux of CO2 is from the atmosphere into the crop canopy) and was approximately equal to or greater than that reported for several species of grasses and forests. Te daily average CO2 retention is the difference between the NEE integrated during the day and night, which was 44.94 kg C ha-1 d-1. This was also equal to or greater than the values reported for other species and crops. Tere was a parabolic relationship between NEE and the ET rate where the maximum NEE rate was 25.92 µmol m-2 s-1 at an ET of 5.477 µmol m-2 s-1. The relationship between NEE and absorbed PAR was similar: the maximum NEE rate was 23.08 µmol m-2 s-1, with an absorbed PAR of 1127.5 µmol m-2 s-1.

El cultivo de caña de azúcar (Saccharum officinarum L.) aporta aproximadamente dos terceras partes de la producción mundial de azúcar. Es una planta de metabolismo tipo C4 con capacidad alta de asimilación de CO2. La asimilación de CO2 por el dosel de un cultivo se puede determinar midiendo el intercambio neto de CO2 entre el ecosistema (vegetación y suelo) y la atmósfera (NEE). En este estudio se realizaron mediciones de NEE de un cultivo de caña de azúcar y se compararon contra los valores reportados para otras especies vegetales. Se analizó también la relación del NEE con la tasa de evapotranspiración (ET) y la radiación fotosintéticamente activa (PAR) absorbida por el dosel. La tasa instantánea de NEE del cultivo fue -28.23 µmol CO2 m-2 s-1 (el signo negativo indica que el flujo neto de CO2 es de la atmósfera hacia el dosel del cultivo) y fue aproximadamente igual o mayor a la reportada para varias especies de pastos y bosques. La retención promedio diaria de CO2 corresponde a la diferencia entre el NEE integrado durante el día y la noche, y fue 44.94 kg C ha-1 d-1. éste también fue igual o mayor a los valores reportados para otras especies y cultivos. Hubo una relación parabólica entre el NEE y la tasa de ET donde la tasa máxima de NEE fue 25.92µmol m ² s-1 a una ET de 5.477 μmol m-2 s-1. La relación entre NEE y PAR absorbida fue similar: la máxima tasa de NEE fue 23.08 μmol m-2 s-1, con una PAR absorbida de 1 127.5 µmol m-2 s-1.

6513 downloads Cited 4 times in SciELO

10.

PERSPECTIVES OF MARINE BIODIVERSITY STUDIES IN ARGENTINA
Facebook Twitter

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

Metrics
- SciELO Analytics

Lutz, Vivian A

; Boschi, Enrique E

; Bremec, Claudia S.

; Cousseau, María Berta

; Figueroa, Daniel E.

; Rodríguez, Diego H.

; Scarlato, Norberto

; Viñas, María Delia

; Lewis, Mirtha N.

; Penchaszadeh, Pablo E.

; Acuña, Fabián H

; Aguirre, Marina L.

; Akselman, Rut

; Alder, Viviana A.

; Baldoni, Ana

; Barría, María S.

; Bastida, Ricardo O.

; Boraso, Alicia S.

; Calvo, Jorge

; Campagna, Claudio

; Cañete, Guillermo

; Cassia, María C.

; Cervellini, Patricia M.

; Chiaramonte, Gustavo E.

; Costagliola, Marcela

; Cosulich, Guillermina

; Daponte, María C.

; Díaz de Astarloa, Juan M.

; Elías, Rodolfo

; Esnal, Graciela B.

; Excoffon, Adriana C.

; Freije, Hugo

; García de la Rosa, Susana

; Genzano, Gabriel N.

; Giberto, Diego A.

; Guerrero, Raúl

; Helbling, Walter

; Hoffmeyer, Mónica S.

; Incorvaia, Inés S.

; Iribarne, Oscar

; Jaureguizar, Andrés J.

; Kogan, Mariela

; Lovrich, Gustavo A

; Madirolas, Adrián O.

; Martin, Juan P.

; Martos, Patricia

; Mendoza, María L.

; Marque, Silvina Menu

; Mianzán, Hermes W.

; Morriconi, Elba R.

; Negri, Rubén M.

; Obenat, Sandra

; Pastor de Ward, Catalina T.

; Pérez de Fankhauser, Laura B.

; Quintana, Flavio

; Reta, Raúl

; Rico, Rita

; Roux, Ana M.

; Sabatini, Marina E.

; Scelzo, Marcelo A.

; Schejter, Laura

; Schiavini, Adrián C.M.

; Silva, Ricardo I.

; Silvoni, María G.

; Spivak, Eduardo

; Trucco, María I.

; Vallarino, Eduardo A.

; Zelaya, Diego G.

Gayana (Concepción)

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2003, Volume 67 N. 2 Pages 371 - 382

Abstract: En | Text: En | PDF: En

2207 downloads

Showing

itens per page

Page of 1 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 »