Adsorption capacity was studied having seaweed Undaria pinnatifida sp. in adsorption of metal ions of zinc and cadmium to an individual system (monometallic) and mixtures (bimetal) of an aqueous solution. We studied this process preliminarily, contact time, pH of the biopolymer solution and treatment. The kinetic study of the behavior determined that the adsorption system was pseudo second-order equation using the Langergren (initial concentration 50mg/L, weight = 0,4g biopolymer, pH = 3 - 5). The nonlinear modeling the Langmuir and Freundlich isotherm, the Langmuir model obtained a better correlation coefficient close to unity, determining the maximum sorption capacity of metals such as zinc ions was qmax = 44,91mg/g and cadmium qmax = 102,38 mg/g at pH = 4 at a contact time of 60 minutes, with the alga in untreated monometallic system, being more efficient for the ion adsorption cadmiu...

The study was carried out in the central Andes of Peru aiming to evaluate promising genotypes of dual-purpose barley (greater grain and straw yield), cultivated during the dry season. Twenty-five genotypes, of which 22 were barley mutants generated by induction from the commercial variety UNA La Molina 96 were tested. A completely randomized block design with 25 barley genotypes and 3 replications per genotype was used. The yield in grain (kg/ha) and straw (kg DM/ha) was evaluated, as well as the protein content, neutral detergent fibre and in vitro digestibility of organic matter for the straw. The genotypes that showed the best characteristics for a dual-purpose barley were UNALM 96 M6h-617, followed by UNA 80 line 525 and UNALM 96 M6h-326. No significant relationship was found between grain and straw production.

The study was carried out in the central Andes of Peru aiming to evaluate promising genotypes of dual-purpose barley (greater grain and straw yield), cultivated during the dry season. Twenty-five genotypes, of which 22 were barley mutants generated by induction from the commercial variety UNA La Molina 96 were tested. A completely randomized block design with 25 barley genotypes and 3 replications per genotype was used. The yield in grain (kg/ha) and straw (kg DM/ha) was evaluated, as well as the protein content, neutral detergent fibre and in vitro digestibility of organic matter for the straw. The genotypes that showed the best characteristics for a dual-purpose barley were UNALM 96 M6h-617, followed by UNA 80 line 525 and UNALM 96 M6h-326. No significant relationship was found between grain and straw production.

Adsorption capacity was studied having seaweed Undaria pinnatifida sp. in adsorption of metal ions of zinc and cadmium to an individual system (monometallic) and mixtures (bimetal) of an aqueous solution. We studied this process preliminarily, contact time, pH of the biopolymer solution and treatment. The kinetic study of the behavior determined that the adsorption system was pseudo second-order equation using the Langergren (initial concentration 50mg/L, weight = 0,4g biopolymer, pH = 3 - 5). The nonlinear modeling the Langmuir and Freundlich isotherm, the Langmuir model obtained a better correlation coefficient close to unity, determining the maximum sorption capacity of metals such as zinc ions was qmax = 44,91mg/g and cadmium qmax = 102,38 mg/g at pH = 4 at a contact time of 60 minutes, with the alga in untreated monometallic system, being more efficient for the ion adsorption cadmiu...