Las bacterias endofíticas son conocidas como PGPE (Plant growth-promoting endophytic bacteria) presentan un alto potencial biotecnológico para aumentar los índices de productividad agrícola, estos microorganismos tienen la capacidad de interactuar con las plantas en donde contribuyen con la fijación biológica de nitrógeno, capacidad de solubilizar fosfatos, producción de anti fúngicos, entre otros beneficios para las plantas. En este estudio se aisló 85 bacterias endofíticas, se identificó 11 géneros bacterianos: Burkholderia, Gamma, Enterobacter, Klebsiella, Pseudomonas, Chryseobacterium, Pantoea, Agrobacterium, Rhizobium, Bacillus y Xanthomonas. El 29,31% de los aislados bacterianos presentaron la capacidad de solubilizar el fosfato y la actividad antagónica (anti fúngicos) siendo solamente observados 10 cepas bacterianas endofiticas. La identificación molecular fue rea...

Lead is a toxic substance that can be present in toys through their decorative painting and that, when absorbed orally by children, can lead to chronic intoxication through bioaccumulation. As a result, in Peru, Maximum Permissible Limits (MPL) of 90 ppm or mg/kg have been established according to D.S. No. 008-2007-SA. Thus, the objective of the present investigation was to determine the concentration of lead in educational toys (puzzles) to determine if they are within the Maximum Permissible Limits (MPL) and its relationship with the places of sale, country of origin and if it has sanitary authorization. Samples were analysed by the ICP-OES method. The 92,85% of toys had lead concentrations above 90 ppm/Pb. The values had a maximum of 3712,5 90 ppm/Pb and a minimum of 60 ppm. Therefore, it was concluded that lead concentration in most toy paints exceeds the established values for lead....

The fiber quality of cotton (Gossypium barbadense L.) native to the Peruvian Amazon region is one of the most versatile and essential natural fibers in the Peruvian textile industry. There is little information about the fiber quality traits of cotton genotypes native to the Peruvian Amazon region. This study investigated the fiber quality traits of Peruvian Pima cotton accessions native to the Amazon region of the La Convención Province, Cusco, Peru, to determine the lines with the greatest potential for improving fiber quality in cotton genetic breeding programs. A total of 14 cotton accessions with white fiber color, being 12 accessions of G. barbadense L. (Pima cotton) and two accessions of Gossypium sp. (unknown cotton), were analyzed. The fiber properties determined using the high volume instrument method included seven characteristics. All fiber properties were classified into fi...