The existing relation between the adhesion of epoxilenolic resin and the sense of lamination of the tin plate by means of gravimetric, microscopic and electromechanical tests studies in a random sample that evaluates the resistance to the abrasion, the percentage of porosity and rugosity. The resin deposited in cross-sectional form presents up to 43,7% of diminution of mass given off by abrasion, with respect to the deposited one following the sense of lamination of the tin plate. lt has been observed that exists a proportional relation between the percentage of adhesion and the porosity produced by the effect «crosspiece». Also, the framework that the polymeric form with the substrate, in a cross-secional application, produces a high resistance to the electric flux that reduces the current passage up to 50.6%.

The flow redox that forms between the metallic transporters and their surroundings, gives rise to the oxidating process of the alloy of which they are done. The application of average mechanics and chemicals remove formed oxides, contributing to their rehabilitation. Of tried acids, the spirit of salt to 20%V, was the solution that fulfilled the specifications for the removal and cleaning (pickling) of a metallic structure. Then, the formation of oxidating centers was slowed down by means of the aspersion with aqueous solution of sodium nitrite to 20%V. Also, the drying to temperatures majors of 160ºC optimizes the passivation. The results obtained to different times show a mini formation of rust, the one that to industrial conditions is despicable.

The existing relation between the adhesion of epoxilenolic resin and the sense of lamination of the tin plate by means of gravimetric, microscopic and electromechanical tests studies in a random sample that evaluates the resistance to the abrasion, the percentage of porosity and rugosity. The resin deposited in cross-sectional form presents up to 43,7% of diminution of mass given off by abrasion, with respect to the deposited one following the sense of lamination of the tin plate. lt has been observed that exists a proportional relation between the percentage of adhesion and the porosity produced by the effect «crosspiece». Also, the framework that the polymeric form with the substrate, in a cross-secional application, produces a high resistance to the electric flux that reduces the current passage up to 50.6%.

The flow redox that forms between the metallic transporters and their surroundings, gives rise to the oxidating process of the alloy of which they are done. The application of average mechanics and chemicals remove formed oxides, contributing to their rehabilitation. Of tried acids, the spirit of salt to 20%V, was the solution that fulfilled the specifications for the removal and cleaning (pickling) of a metallic structure. Then, the formation of oxidating centers was slowed down by means of the aspersion with aqueous solution of sodium nitrite to 20%V. Also, the drying to temperatures majors of 160ºC optimizes the passivation. The results obtained to different times show a mini formation of rust, the one that to industrial conditions is despicable.

El presente estudio describe la elaboración de una metodología analítica con una Exactitud y Precisión adecuada que permite cuantificar la concentración del CO2 y H2S en el Gas Natural. Para su desarrollo se utilizaron Normas de referencia como la ASTM e ISO. La cromatografía de gases (GC), como técnica analítica, es una herramienta adecuada para la determinación de la concentración de CO2 yH2S en el Gas Natural (GN), ya que nos permite separar los componentes térmicamente estables y más fáciles de volatilizar y nos proporciona una herramienta de análisis que reporta resultados confiables y repetibles. Las etapas de separación cromatográficas han sido evaluadas y optimizadas basándose en el uso de un detector de conductividad térmica (TCD) para CO2 y otro de Quimioluminiscencia (SCD) para la determinación de H2S. Durante el desarrollo de la metodología se identificaro...

El presente estudio describe la elaboración de una metodología analítica con una Exactitud y Precisión adecuada que permite cuantificar la concentración del CO2 y H2S en el Gas Natural. Para su desarrollo se utilizaron Normas de referencia como la ASTM e ISO. La cromatografía de gases (GC), como técnica analítica, es una herramienta adecuada para la determinación de la concentración de CO2 yH2S en el Gas Natural (GN), ya que nos permite separar los componentes térmicamente estables y más fáciles de volatilizar y nos proporciona una herramienta de análisis que reporta resultados confiables y repetibles. Las etapas de separación cromatográficas han sido evaluadas y optimizadas basándose en el uso de un detector de conductividad térmica (TCD) para CO2 y otro de Quimioluminiscencia (SCD) para la determinación de H2S. Durante el desarrollo de la metodología se identificaro...

In Radiopharmacy the use of complexes as radiopharmaceutical requires that the procedure of labelling (complexing) achieves a radiochemical purity ot the complex ligand-Tc 99m greater than 98%. A study to find the chemical and physical parameters which allows the complexing of the EC ligand with Te 99m and the biological distribution is presented.

By using the criterions of sensibility of IUPAC, we had determinad the sensibility far chromic (III) and (VI) from solution of its differents salts. We found that ion chromic (VI) in the form ion chromate is much sensible than chromic (III).

In Radiopharmacy the use of complexes as radiopharmaceutical requires that the procedure of labelling (complexing) achieves a radiochemical purity ot the complex ligand-Tc 99m greater than 98%. A study to find the chemical and physical parameters which allows the complexing of the EC ligand with Te 99m and the biological distribution is presented.

By using the criterions of sensibility of IUPAC, we had determinad the sensibility far chromic (III) and (VI) from solution of its differents salts. We found that ion chromic (VI) in the form ion chromate is much sensible than chromic (III).

The adsorbent capacity of biomasses pre-treated has been evaluated, containing pectin and alginate. The orange shells and lemon and the nopal palmets were dried and crushed, before being treated with NaOH to produce the demetoxilation of the pectin. For the reticulation of the polysaccharides they become agitated the biopolymers with a solution 0,2 M of CaCl2, improving their mechanical stability. The good pH in the process of biosorption of the Cu (II) it was in the range from 4 to 4.5. The capacity of biosorption of these biomasses was evaluated in assays type batch. The biosorption isotherms are described by the models of Langmuir, being obtained a maximum capacity of adsorption of 68,97 mg/g and equilibrium constant of 0,093.

The adsorbent capacity of biomasses pre-treated has been evaluated, containing pectin and alginate. The orange shells and lemon and the nopal palmets were dried and crushed, before being treated with NaOH to produce the demetoxilation of the pectin. For the reticulation of the polysaccharides they become agitated the biopolymers with a solution 0,2 M of CaCl2, improving their mechanical stability. The good pH in the process of biosorption of the Cu (II) it was in the range from 4 to 4.5. The capacity of biosorption of these biomasses was evaluated in assays type batch. The biosorption isotherms are described by the models of Langmuir, being obtained a maximum capacity of adsorption of 68,97 mg/g and equilibrium constant of 0,093.

The study consists on the treatment of pumping water of the fish flour industry, using flotation systems for dissolved air, sedimentation or others as viable methods of primary treatment tor removal of insoluble materials. An the conditioning of a coagulant or flocculant, organic or inorganic, to destabilize the formed micelles to allow the separation of the organic material with the purpose of reaching an effective removal of fine solids in suspension, emulsified fatty and oils and in this way to reduce the biological demand of oxygen of the effluent discharged to the sea.

The study consists on the treatment of pumping water of the fish flour industry, using flotation systems for dissolved air, sedimentation or others as viable methods of primary treatment tor removal of insoluble materials. An the conditioning of a coagulant or flocculant, organic or inorganic, to destabilize the formed micelles to allow the separation of the organic material with the purpose of reaching an effective removal of fine solids in suspension, emulsified fatty and oils and in this way to reduce the biological demand of oxygen of the effluent discharged to the sea.

It has been obtained bead of calcium alginate with micro-particles of algae Macrosystis Pyrifera. The optimum pH for adsorption of Cu(II) lie between 4,5 and 5. From the study of the kinetics of adsorption was determined that the equilibrium was reached after 400 min. The adsorption data fitted well with the Langmuir model and showed the maximum adsorption capacity qmax= 14,04 mg/g.

It has been obtained bead of calcium alginate with micro-particles of algae Macrosystis Pyrifera. The optimum pH for adsorption of Cu(II) lie between 4,5 and 5. From the study of the kinetics of adsorption was determined that the equilibrium was reached after 400 min. The adsorption data fitted well with the Langmuir model and showed the maximum adsorption capacity qmax= 14,04 mg/g.