Introducción: el abuso es un tipo de violencia que continúa aumentando, pero esto no se ha descrito en las poblaciones de los Andes peruanos. Objetivo: determinar los factores socioeducativos asociados con la percepción de abuso físico y psicológico en 31 escuelas secundarias en una ciudad del altiplano peruano. Métodos: estudio analítico, transversal. La población estudiada consistió en 10 382 escolares de 31 instituciones educativas públicas y privadas de nivel secundario, de la ciudad de Huancayo, Perú. Las principales variables fueron haber sufrido abuso físico y psicológico, y estos datos se obtuvieron de una encuesta, previamente validada, en nuestro entorno. Se obtuvieron asociaciones estadísticas. Resultados: los abusos psicológicos y físicos más frecuentes fueron: haber recibido gritos y carga académica excesiva, respectivamente. El sexo femenino se asoció con...

Biomass (ф) production from Spirulina sp. batch cultures was optimized in laboratory scale photobioreactors (LPB) of 0.2 L, by the effect of X1: intensity of light emitting diodes (LEDs) and X2: photoperiod, between 1.25-41.7 klux and 12/12-24/0 hours of light/dark (L/D) respectively using a central composite rotational design (CCRD) and response surface methodology (RSM). The hydraulic characteristics and ф value from Spirulina batch cultures were also evaluated in a closed-loop channel photobioreactor open to the atmosphere (PB-CLOA) by the effect of the lighting LED of 8.3±1.9 klux and photoperiod of 12/12 and 24/0 h L/D. Two optimal zones of ф in LPB were identified, both with a 21.5 klux LED intensity and photoperiod relationship of 12/2 and 24/0 h L/D, with values of 1.65 and 1.62 ф respectively. The mathematical model which indicated the optimal zones was of 2nd order, which ...

Biomass (ф) production from Spirulina sp. batch cultures was optimized in laboratory scale photobioreactors (LPB) of 0.2 L, by the effect of X1: intensity of light emitting diodes (LEDs) and X2: photoperiod, between 1.25-41.7 klux and 12/12-24/0 hours of light/dark (L/D) respectively using a central composite rotational design (CCRD) and response surface methodology (RSM). The hydraulic characteristics and ф value from Spirulina batch cultures were also evaluated in a closed-loop channel photobioreactor open to the atmosphere (PB-CLOA) by the effect of the lighting LED of 8.3±1.9 klux and photoperiod of 12/12 and 24/0 h L/D. Two optimal zones of ф in LPB were identified, both with a 21.5 klux LED intensity and photoperiod relationship of 12/2 and 24/0 h L/D, with values of 1.65 and 1.62 ф respectively. The mathematical model which indicated the optimal zones was of 2nd order, which ...