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INCI vol.29 no.10 Caracas Oct. 2004  Press Release | | | | |
| Editorial | | | | | | · Los límites de la multidisciplinaridad
| | | | | Articulos Originales | | | | | | · Fitoplancton de un embalse tropical hipereutrófico (Pao-Cachinche, Venezuela): abundancia, biomasa y producción primaria
González, Ernesto J; Ortaz, Mario; Peñaherrera, Carlos; Matos, María L.
| | | | | | · The effect of oxidative stress on retinal and choroidal cytoarchitecture was evaluated, and the levels of reduced glutathione (GSH) analyzed, in rats subjected to hyperoxygenation (80 ±1% O2). Groups of rats were oxygenated from birth (day 0) to days 6, 9, 12 or 14 of life, while others were kept under normal O2 (controls). GSH blood concentration was determined in each period. Retinal and choroidal histology was studied in 30 day-old rats. GSH concentration was significantly lower in rats oxygenated on days 0-6 and 0-9 than in controls. However, rats kept under high O2 on days 0-12 and 0-14 showed similar values to the controls, possibly due to an adaptive process. In the retina and choroid of rats exposed to O2 on days 0-9, 0-12 and 0-14, capillary vasoconstriction was observed, as well as tight junction weakening in choroidal capillaries leading to hemorrhage. The retina from rats subjected to hyperoxigenation from 0-12 days showed vacuolized horizontal cells with damaged mitochondria and swollen nuclear envelopes. The results show severe structural damage in the retina and choroid when animals are subjected to high O2 levels.
Rojas,, Luz Marina; Suárez, Sor Marilú; Lemus, Mairín; Benítez, Katiuska; Ramírez, Yleana; Mitchell, Makerys; Boada-Sucre, Alpidio
| | | | | | · Remoción de percloroetileno en dos tipos de sistemas anaerobios continuos
Zárate-Segura, Paola; Ríos-Leal, Elvira; Esparza-García, Fernando; García-Mena, Jaime; Sanz, José L; Zaiat, Marcelo; Poggi-Varaldo, Héctor M.
| | | | | | · Pruebas normalizadas para la evaluación de la biodegradabilidad de sustancias químicas. una revisión
Vázquez-Rodríguez, Gabriela A.; Beltrán-HernÁndez, Rosa Icela
| | | | | Comunicaciones | | | | | | · Variability of antioxidant activity among honeybee-collected pollen of different botanical origin
Almaraz-Abarca, Norma; Campos, Maria da Graça; Ávila-Reyes, J. Antonio; Naranjo-Jiménez, Néstor; Herrera-Corral, Jesús; González-Valdez, Laura S
| | | | | | · Patterns of leaf epicuticular waxes in species of Clusia: taxonomical implications
Medina, Ernesto; Aguiar, Guillermina; Gómez, Matilde; Medina, José D
| | | | | | · Compuestos orgánicos volátiles en la atmósfera de la gran sabana. III: distribución de tamaño de los aerosoles de Formiato, Acetato, Piruvato y Oxalato
Pacheco, Milexi; Sanhueza, Eugenio
| | | | | | · Pectinaria chilensis NILSSON, 1928 (POLYCHAETA: PECTINARIIDAE): taxonomic characterization, new distributional records and ecological notes from the chilean coast
Moreno,, Rodrigo A.; Rozbaczylo, Nicolás; Sepúlveda, Roger D; Carrasco, Franklin D.; Soto, Raúl
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