Identifica la frecuencia y los factores asociados al bullying en una escuela pública de un distrito de la provincia de Trujillo en La Libertad, 2013. Es un estudio cuantitativo, analítico, observacional, de corte transversal cuya muestra estuvo constituida de 318 estudiantes inscritos durante el periodo 2013. A los escolares se les aplicó un cuestionario previamente comprobado y adaptado por el Equipo Técnico de la Comisión Nacional para el Desarrollo y Vida sin Drogas (DEVIDA). Los datos se evaluaron utilizando un análisis bivariado (Prueba de Independencia Chi-cuadrado) con un nivel de significación de 0,05. Menos del 50% de escolares fueron víctimas de bullying y, su presencia fue leve a moderada. Se concluye que los escolares varones presentan mayor ocurrencia de agresión (61,3%). El tercer año de secundaria presentó mayor frecuencia de casos (61,4%). Predominan la agresi�...

Objectives: Identify the factors associated with the presence of bullying in secondary school students of a state  school in the district of El Porvenir, Peru. Material  and  methods: This  descriptive, cross-sectional study with an observational  design  was carried out using a self-applicable  survey.  The  population  was composed of 1,069 students from the 1st to the 5th year of secondary school. The sample was probabilistic and  stratified, designed to be  representative and give reliable estimates about the problem and included 318 male and female students enrolled during 2013. The instrument used was the questionnaire developed and validated by the Technical Team of the National Commission for Development and Life without Drugs – DEVIDA, based on a standardizeddevice proposed by SIDUC/CICAD. In the first stage, a b...

The present work consisted of to identify the type of saponins using qualitative reactions and at the same time to quantify the saponins from Cucumis dipsaceus species, “soap land” by Chromatography of Liquids of High Resolution (HPLC). In this way, we decided to adopt a new approach in order to achieve the objectives. First, the saponins were extracted by maceration, the first time in hexan and the second time in water. Then it suffered consecutive extractions using increasing solvent polarity; chloroform, ethyl acetate and n-butanol, as a result we obtained a pulverulent and off-white product. The hydrolyzes was done with hydrochlorate acid. The mixture was refluxed in a Maria bath between 68-70ºC for 20 minutes. The sapogenins released were extracted with chloroform. It was prepared solutions of experimental patron saponins by means of which the calibration curve was obtained; th...