We analyze the results achieved using a pre-leaching stage in the preparation of carbonized coconut shell, to obtain activated carbon by physical activation method with carbon dioxide as activating agent at different times of activation. The leaching step included the magnetic treatment of the leaching solution of sodium hydroxide used. The results showed that the leaching stage...
A good reason for all of us to take care of the environment where we move, work, take our meals and live must be greater when we really know that if we don’t care could be our own destruction. The knowledge of the health state of the environment is an essential factor for the protection that every one of us must establish in our enviroment. In this work is shown the process...
The aim of this work was to evaluate the compaction behavior and the physical mechanical characterization of tablets, obtained from a natural dry extracts of the leaves of Tamarindus indica L. The Heckel analysis was used to characterize the dry extract compaction behavior. The dry extract has a mixed mechanism of consolidation: plastic and brittle fracture, showing a mean yield...
At the present time, the heterogeneous catalysis constitutes one process that offers many advantages for the development of economic and effective methods in order to obtain already well-known substances, being the preparation of the solid catalysts a fundamental stage in order to reach successes in the results. In this work, information published on the topic is analyzed. It is...
This paper deals with the evaluation of magnetic treatment effect in boiler feeding water for avoiding formation of inlays and negative corrosion effects. This work is developed in Siboney sugar mill, in Camaguey, Cuba. Magnetic treatment effectiveness is demonstrated, because of useful life of exposed metallic surfaces is increased and corrosion effects decreased. It is proved...
The biomass gasification is one way energy conventions which maintain in phase the investigation and development with some application in the electrical generation. The scientific investigation activity about theme hit the center away improvement a design; modelation and evaluation of different type the gasifiers, the practical applications carry out through small and middle...
A strategy is developed for the evaluation from the level of environmental management for facilities with PCBs applications, principles, objectives and goals for a sure primary management. As well as a methodology for the identification of applications with PCBs that allow conforming the management system guided to guarantee the technological and environmental security in the...
This paper presents the results of thermogravimetric and differential thermal analysis performed on four types of biomass. In the curves of mass loss as a function of temperature (TG) was able to distinguish three main zones: a lower temperature to 200 ºC or stage at which moisture is evaporated and released CO and CO2. Then there was a period of increased mass loss, between 200...
This work gives continuity to one previously presented by the same authors that it takes for title: Models for the calculation of the constant of speed of crystallization of the commercial sugar in tachos. It is indispensable to be able to give culmination to the initiate work. As we has thought about, the glasses of commercial sugar don't always reach their commercial size that...
In this paper we studied the scale-up of the synthesis of fructooligosaccharides from sucrose, catalyzed by a biocatalyst consisting of living cells of Pichia pastoris recombinant immobilized in calcium alginate, in a stirred tank bioreactor type 5-L capacity and equipped with an impeller of blades on a propeller. We analyzed the impact of scale-up from 5 to 50 L of bio-catalysis...
This work is carried out in the workshop of production belonging to the Chemical Bioactive Center (CBQ). The G-0 or 2- (2 nitrovinyl furan) is well-known for its applications such as insecticide, antiparasitic, antibacterial, antifungal and also constitutes the main raw material for production of Active Pharmaceutical Ingredient 2-bromo-5-(2-bromo-2-nitrovinyl)-furan,(G-1). From...
In this article ecotoxicological tests are performed in order to infer the residual effect of mycotoxins may have on the ecosystem from the effect it produces on a population of organisms that form a fundamental part of the food chain. The ecotoxicological tests on Brachidanio rerio, showed that mortality was 100 % of the fish at concentrations 10, 20 and 30 % of solid waste and...
A good reason for all of us to take care of the environment where we move, work, take our meals and live must be greater when we really know that if we don’t care could be our own destruction. The knowledge of the health state of the environment is an essential factor for the protection that every one of us must establish in our enviroment. In this work is shown the process...
The aim of this work was to evaluate the compaction behavior and the physical mechanical characterization of tablets, obtained from a natural dry extracts of the leaves of Tamarindus indica L. The Heckel analysis was used to characterize the dry extract compaction behavior. The dry extract has a mixed mechanism of consolidation: plastic and brittle fracture, showing a mean yield...
At the present time, the heterogeneous catalysis constitutes one process that offers many advantages for the development of economic and effective methods in order to obtain already well-known substances, being the preparation of the solid catalysts a fundamental stage in order to reach successes in the results. In this work, information published on the topic is analyzed. It is...
This paper deals with the evaluation of magnetic treatment effect in boiler feeding water for avoiding formation of inlays and negative corrosion effects. This work is developed in Siboney sugar mill, in Camaguey, Cuba. Magnetic treatment effectiveness is demonstrated, because of useful life of exposed metallic surfaces is increased and corrosion effects decreased. It is proved...
The biomass gasification is one way energy conventions which maintain in phase the investigation and development with some application in the electrical generation. The scientific investigation activity about theme hit the center away improvement a design; modelation and evaluation of different type the gasifiers, the practical applications carry out through small and middle...
A strategy is developed for the evaluation from the level of environmental management for facilities with PCBs applications, principles, objectives and goals for a sure primary management. As well as a methodology for the identification of applications with PCBs that allow conforming the management system guided to guarantee the technological and environmental security in the...
This paper presents the results of thermogravimetric and differential thermal analysis performed on four types of biomass. In the curves of mass loss as a function of temperature (TG) was able to distinguish three main zones: a lower temperature to 200 ºC or stage at which moisture is evaporated and released CO and CO2. Then there was a period of increased mass loss, between 200...
This work gives continuity to one previously presented by the same authors that it takes for title: Models for the calculation of the constant of speed of crystallization of the commercial sugar in tachos. It is indispensable to be able to give culmination to the initiate work. As we has thought about, the glasses of commercial sugar don't always reach their commercial size that...
In this paper we studied the scale-up of the synthesis of fructooligosaccharides from sucrose, catalyzed by a biocatalyst consisting of living cells of Pichia pastoris recombinant immobilized in calcium alginate, in a stirred tank bioreactor type 5-L capacity and equipped with an impeller of blades on a propeller. We analyzed the impact of scale-up from 5 to 50 L of bio-catalysis...
This work is carried out in the workshop of production belonging to the Chemical Bioactive Center (CBQ). The G-0 or 2- (2 nitrovinyl furan) is well-known for its applications such as insecticide, antiparasitic, antibacterial, antifungal and also constitutes the main raw material for production of Active Pharmaceutical Ingredient 2-bromo-5-(2-bromo-2-nitrovinyl)-furan,(G-1). From...
In this article ecotoxicological tests are performed in order to infer the residual effect of mycotoxins may have on the ecosystem from the effect it produces on a population of organisms that form a fundamental part of the food chain. The ecotoxicological tests on Brachidanio rerio, showed that mortality was 100 % of the fish at concentrations 10, 20 and 30 % of solid waste and...