Once aluminium is extruded, in contact with oxygen, forms quickly an aluminium oxide superficial protector layer, which is not penetrated by humidity, gases or polluting agents. This layer has a low thickness and is a bad base for painting anchorage. Through the chemical superficial treatment of the aluminium profile (degreased, deoxidized and cleaning), it is possible its...
One of these days’ environmental problems is the contamination of soils by hydrocarbons due to bad practices and oil and its derivatives handling accidents. In this work laboratory level treatability essays have been doing, using anaerobic digestion muds and pleurotin to stimulate and bioaugment, respectively, the indigenous population of hydrocarbons contaminated soil. The...
The present work offers the results from the realized investigation to laboratory scale for the obtaining of nickel hydroxide with characteristic such that can be used for the production of batteries, catalysts and pigments, among other applications. It was determined the influence of the temperature, the pH and the time of retention in the efficiency of nickel precipitation...
Scientometrics is the metric specialty that applies mathematical methods and models to discipline or knowledge domain. It therefore seeks to study examining the international scientific literature on the subject: Sugarcane and Applied Chemistry. The study aims to provide relevant information to the scientific who publishing topics related to chemistry as a discipline of knowledge...
The biosorption is considered an alternative technology for removal of heavy metals from wastewater and the use of seaweeds as adsorbents encourages scientific interest, considering the variety, abundance and availability of different species growing or arriving at the coastal shoreline. The aim of the research was to characterize a seaweed biosorbent prepared from marine algae...
This paper presents a study of the physical-chemical parameters of crude CPNM-1400 and M-30 that were measured before and after magnetic treatment; in order to evaluate the effect of a static magnetic field on said parameters. Passing oil sample M-30 by a magnetic conditioner 0.4550 ± 0.009 T, is able to separate up to 52.8% of the water present in the sample. No evidence of the...
It is of great importance for the protection of the environment the use of biogas plants. This work has as objective the presentation of an alternative for the energy use of the trash of malted barley. He/she is carried out a characterization of the process of obtaining of beer Hatuey, identifying the different ones residual generated and the use of the trash of malt with energy...
In this work were evaluated physical and chemical properties of different classes of size of samples of bagasse cane, like part of the study of thermal decomposition of the same ones. Two samples were studied; being obtained a very varied distribution, from a fine powder until irregular particles of great size, the biggest accumulations were obtained for particles smaller than 0...
A technology for the management of the obsolete reagent, (NH4)2Cr2O7 by being converted into chromium oxide (III) is offered. Use tests were carried out in the ceramic factory "José L Tassende" with good results. The chromium content into the obtained oxide was determined, which was in the range from 98, 75 to 98, 88 due to the accidental errors for a grade of security of 0, 95...
In order to have a tool to estimate the monthly and annual solar radiation on the horizontal surface in Junín region, in which is not available with this information, adapted Bristow-Campbell (1984) model for estimating global solar radiation monthly average. To develop the model of Bristow-Campbell that estimates the average daily global solar radiation monthly modeling...
In the logistics management of any business organization is a very important allocation of material resources, both for its dynamic approach to the internal processes of the company, as the pursuit of customer satisfaction, enabling the fulfillment of their goals efficiently and effectively. In this context, effective results use with models of Material's Requirements Planning...
The work was made in the fuel area of Electrical Central Diesel MTU of Varadero, which is in an area of high corrosive aggressiveness and it is constituted by systems of fuel tanks, two centrifuges, two pumps, structural facilities of pipes and components, those that in their great majority are metals. From the made diagnosis with the help of the international norms anticorrosive...
The present work shows the potentialities of producing inulin in Cuba, as nutritious supplement for its exceptional nutritional characteristic, from Tuna (Opuntia ficus-indicates). In this study, the raw material selection was carried out a study take into account the inulin content, readiness, among other aspects. An experimental study to obtain the extraction modeling under...
The Streptokinase way recombinant engineering was obtained at the Center of Genetic Engineering and Biotechnology (CIGB) in 1989 and after the technology transference to the National Center for Bioproducts (BioCen) in 2002, it has been possible to stably produce this medicament. Thanks to the effective and economic character of this protein it is widely used in some cases, under...
Aloe vera (sabila) is a non-traditional fermentation substrate bearing the most of its carbohydrates in an arrange of mannose polymers. This work had the objective to evaluate potentialities of the use of Aloe vera juice as an early substrate with sugar cane by-products for Lactobacillus plantarum LB/103-1-5 strain growth. Sabila juice at 100 %, supplemented with both glucose and...
This paper shows the new technical improvement in the production of VitroCen®MS with a higher production efficiency and quality standards. The change in the technology achieved to solve the problem of sedimentation of the salts, process interruptions and the frequent substitution of the stators in the drying machine, which is a source of high cost in the production of the culture...
The present experimental work was carried out to scale of Demonstrative Unit of Production (UDP) in the Leaching Plant of the Punta Gorda in Cuba with the objective of establishing a sure procedure for the diagnosis of the technological efficiency of the miniseries work, which allows to detect on time: the obstructions in the system and the unequal distribution of pulp with the...
In this work were evaluated physical and chemical properties of different classes of size of samples of bagasse cane, like part of the study of thermal decomposition of the same ones. Two samples were studied; being obtained a very varied distribution, from a fine powder until irregular particles of great size, the biggest accumulations were obtained for particles smaller than 0...
A technology for the management of the obsolete reagent, (NH4)2Cr2O7 by being converted into chromium oxide (III) is offered. Use tests were carried out in the ceramic factory "José L Tassende" with good results. The chromium content into the obtained oxide was determined, which was in the range from 98, 75 to 98, 88 due to the accidental errors for a grade of security of 0, 95...
In order to have a tool to estimate the monthly and annual solar radiation on the horizontal surface in Junín region, in which is not available with this information, adapted Bristow-Campbell (1984) model for estimating global solar radiation monthly average. To develop the model of Bristow-Campbell that estimates the average daily global solar radiation monthly modeling...
In the logistics management of any business organization is a very important allocation of material resources, both for its dynamic approach to the internal processes of the company, as the pursuit of customer satisfaction, enabling the fulfillment of their goals efficiently and effectively. In this context, effective results use with models of Material's Requirements Planning...
The work was made in the fuel area of Electrical Central Diesel MTU of Varadero, which is in an area of high corrosive aggressiveness and it is constituted by systems of fuel tanks, two centrifuges, two pumps, structural facilities of pipes and components, those that in their great majority are metals. From the made diagnosis with the help of the international norms anticorrosive...
The present work shows the potentialities of producing inulin in Cuba, as nutritious supplement for its exceptional nutritional characteristic, from Tuna (Opuntia ficus-indicates). In this study, the raw material selection was carried out a study take into account the inulin content, readiness, among other aspects. An experimental study to obtain the extraction modeling under...
The Streptokinase way recombinant engineering was obtained at the Center of Genetic Engineering and Biotechnology (CIGB) in 1989 and after the technology transference to the National Center for Bioproducts (BioCen) in 2002, it has been possible to stably produce this medicament. Thanks to the effective and economic character of this protein it is widely used in some cases, under...
Aloe vera (sabila) is a non-traditional fermentation substrate bearing the most of its carbohydrates in an arrange of mannose polymers. This work had the objective to evaluate potentialities of the use of Aloe vera juice as an early substrate with sugar cane by-products for Lactobacillus plantarum LB/103-1-5 strain growth. Sabila juice at 100 %, supplemented with both glucose and...