Revista LASALLISTA de Investigación

Permanent URI for this collection

https://prueba8x.novalinksgroup.com/handle/10567/115

News

Este obra está bajo una licencia Creative Commons Atribución-NoComercial-SinDerivadas 2.5 Colombia.

Browse

Now showing 1 - 20 of 625

Estilos de vida saludables de los estudiantes de la Corporación Universitaria Lasallista. Agosto 2004
(Corporación Universitaria Lasallista, 2004) Rodríguez Gázquez, María de los Ángeles; Castañeda Gallego, Alba Doris; Correa Vargas, Lía Rosa; Sarabia Londoño, Mauricio
Introduction: Heart diseases are a frequent cause of illness and death in our country. There is enough scientific evidence that shows that healthy life styles prevent the appearing of those diseases. Objective: To establish the frequency of exposition to risky factors concerning heart diseases for Corporación Universitaria Lasallista´s students, aiming to acquire information that helps in the development of strategies for avoiding those factors. Materials and methods: A descriptive study was made, using a self-applied survey to get the information. After criticizing the collected data, a data base in the SPSS vr. 11.00 software was created, and this was also used to process the information. In the analysis for hypothetical proofs, these were contrasted with the X2 test when prevalences were compared, and with the t student t´test when the comparison of media rates was made. The statistic significance was assumed when the probability value was les than 0.05. Results: A considerable proportion of the students have inadequate life styles, and this means procrastinated risks for heart disease. Some conducts were particularly worrying, as the total lack of exercise (48%), smoking (36%) and weight increase (overweight 9.5% and obesity 0.5%). The data showed that women have better protective behaviors than men, concerning heart diseases. Conclusion: Corporación Universitaria Lasallista´s students have a considerable measurement of exposition to risky factors concerning heart diseases, through their life styles. Therefore, the adoption of strategies to create healthier life styles among them, is recommended.
Porquinaza en la alimentación animal
(Corporación Universitaria Lasallista, 2004) Castrillón Quintana, Olivia; Jiménez Pérez, Ricardo Andrés; Bedoya Mejía, Oswaldo
In the whole world, the biggest problems faced by pig breeders is the generation of feces, which having a great potential of nutrients, contaminate the environment and can become the main obstacle for the future of the animal industry. Pig feces have been handled traditionally under a pigs-lawn-milk system, using the soil improvement for lawn with the fertilization of organic material, obtaining a better dairy production. To use the contents of the nutrients contained specially by pig’s manure, an alternative can be the conversion to unicellular protein, in a solid state fermentation process with microorganisms.
Mesofauna de los colémbolos en el compost de la Corporación Universitaria Lasallista
(Corporación Universitaria Lasallista, 2004) Arango Gutiérrez, Gloria Patricia; Macías Mazo, Karina Isabel
Samples were taken by using the falling traps method, putting three traps in each composter at a 20-30 cm depth from the surface. The collection of collembolas was done three times a week, during three months, in 2003. The collected organisms were duly cured, to be taxonomically identified afterwards.
Evaluación de la fotodegradación sensibilizada con TiO2 Y Fe3+ para aguas coloreadas
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Rodríguez Restrepo, Alejandra
The necessity of keeping the environment in a good shape, has taken us to look for efficient methods to eliminate chemical compounds, produced by several human activities, which contaminate it. Water pollution is very important, because contaminants can accumulate and be transported by brooks, rives, lakes, dams and underground water sources, affecting life forms around them and the health of humans. The most important contamination sources of ground level and underground water sources are waste waters from domestic and industrial origins. Photocatalytical technologies are very promising t be applied in our country, because the use of sun energy reduces, in a very high measure, the cost. Photocatalytical reactors are easy to use, use sun energy and the radiation of ultraviolet lamps. Besides, they are very easy to be adapted for a great variety of aplications.
El desarrollo en Colombia: historia de una hegemonía discursiva
(Corporación Universitaria Laslallista, 2004) Restrepo Velásquez, Juan Carlos
Introduction: The following text is a part of the finds of the research “EXPLORATORY ANALYSIS OF THE CONCEPT OF DEVELOPMENT INCLUDED IN THE COLOMBIAN DEVELOPMENT PLANS. CONTINUITIES AND FRACTURES. PERIOD 1950-2000”,which tries to establish, theoretically and from an exploratory analysis line, the historical practice of the concept of development in Colombia, according to the concept of development that appears in its National Development Plans and in similar documents during the second half of the XX Century. This research produced three finds: First, the constant conception of economical growth as the only idea of development. Second, evident fractures and discontinuities in the development speech, due to the imperant focuses about the topic and, third, the foreign speech practices in Colombia’s development. This latter find is the one presented with the title: COLOMBIAN DEVELOPMENT: HISTORY OF A HEGEMONICAL SPEECH. Materials and Methods: This research work is theoretical and is made under qualitative research parameters, allowing us to establish a scientific method to have an adequate approach to the research object and interact with it. The approach of this research is established by following the route offered by the documental and historical research method in the multicyclical framework of qualitative research. In this route, hermeneutics (attained to the hermeneuticalhistorical method) was the focus used to approach the interpretation of texts and the appropriate contexts, with the analysis of contents´ method. By the use of analysis matrixes, common elements are inferred and those, from the exploration we are making, have been called finds. They are duly documented and evidenced afterwards. Results and Main Conclusions: From the speeches used for the national development plans, effects of truth and reality have been created, and this fact has implied a control of the used words that, at the end of the day, is the one that produces the hegemonical speech in this case. This sort of speeches have been consolidated from the profesionalization of development and its raising to an institutional level.
Detoxificación de banano verde
(Corporación Universitaria Lasallista, 2004) Garcés Molina, Adelaida María
Colombia produces big quantities of banana to export, but a quantity rated between 10% and 20% is rejected because it does not fulfill the required quality standards. Those rejected bananas can not be used to feed animals, because they are containing tannins, which are anti-nutritional substances, and then those bananas get rotten in the farms, causing environmental problems and economical loses for the producers. An alternative for the use of green bananas as animal food is the reduction of their tannin contents by the use of solid-state fermentation, a very advantageous procedure under economical and process efficiency terms.
La biofiltración, una alternativa para la potabilización del agua
(Corporación Universitaria Lasallista, 2004) Arango Ruiz, Álvaro de Jesús
In current times, the population from developing countries is experiencing a lack of basic sanitary conditions, including the potable water to satisfy their needs. The lack of water potabilization is associated to illness and death among children because of hydric origin diseases. The lack of water available and properly treated for human use, brings the need to get interested on innovative projects in this field, as biofiltration, introducing efficient treatment, potabilization and distribution alternatives which must be easy to be reached and economically viable for the people.
Extracción de taninos presentes en el banano verde
(Corporación Universitaria Lasallista, 2004) Velásquez Valderrama, Ángela María
Introduction: Green rejected bananas are a remain from harvests, they contain high quantities of tannins and polyphenols and low contents of fibers and proteins. Tannins are antinutritional substances, and that is why they do not allow the use of rejected green bananas (“boleja”) in animal feeding, as an energy source. The selective extraction with solvents is a route of separation to obtain tannins. The results shown in this work are an evidence that this separation method is effective to remove tannins from the “boleja”. Objective: Extract the tannins from rejected green bananas (“boleja”) using the extraction with solvents. Materials and methods: The obtaining of alcoholic and watery extracts and their qualitative evaluation was made by combining different extraction and qualitative tannin´s determination procedures, thoroughly shown in the chemical and instrumental analysis literature. The quantitative tannin´s analysis was made by colorimetric methods, using a UV/VIS spectrophotometer in which the samples were read at 700 mn and referred to tannic acid. As a reference substance tannic acid from the Merck brand was used. To measure the absorbing rate a UV-VIS SPECTRONIC-20 spectrophotometer was used. Results: the lineal correlation coefficients calculated for the calibration curves were: From tannic acid: 0.9983, from sample A –alcoholic extract: 0.9977, from sample A –watery extract: 0.9822, from sample B: -Alcoholic extract: 0.9999 and from sample B watery extract: 0.9938. Conclusion: The extraction of tannins from rejected green bananas (“boleja”) with a 1:1 methanol-water solution is more efficient and effective than tannin´s extraction with water.
Los residuos sólidos municipales como acondicionadores de suelos
(Corporación Universitaria Lasallista, 2004) Puerta Echeverri, Silvia María
The compostation made from organic remains produced by municipals, can be a liability and cause damage when used as soil conditioners, because of the excess of inert materials, stinking emissions, high salinity levels, toxicity due to organic contaminants or heavy metals, immaturity of the process and the presence of pathogenic organisms. Given all this factors, it is necessary to evaluate all of the physical, chemical and microbiological parameters of the process, keeping in mind the corresponding Colombian laws on the subject, which regulates the organic materials used as fertilizers and soil conditioners in Colombia: Colombian Technical norm 5167 and the resolution 00150 of January 21st of 2003, made by the Colombian Agro-Cultural Institute, ICA.
Arequipe con fruta, alternativa agroindustrial para aumentar valor agregado
(Corporación Universitaria Lasallista, 2004) Cortés Arango, Astrid Lorena; Ortega Arellano, Lucila María
A research was made taking advantage of the high acceptation consumers have of the traditional product known as arequipe, and an added value was given to it by the addition of natural fruit’s fruits flavor. Our aim was to develop a new product with the desired characteristics of taste, odor and color which are the appropriate for each fruit, without affecting some of the organoleptic properties of the arequipe, such as its soft texture and its mellow consistence, which allows it to be softly sproden on other foods.
Fotodegradación con TiO2 del colorante Rojo Amaranto en aguas
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Mejía Franco, Edwin Alejandro; Peñuela Mesa, Gustavo Antonio
Introduction: Sensitivized biodegradation, with TiO2 and sun light, is a technique which can be used as a depuration system by itself, or as a tertiary process, especially for industrial remains treatment. Photocatalytical technologies are very promising for their application on the solving of water contamination problems. Those technologies are very well regarded to be implemented, because the use of sun light reduces in a great measure the costs of the treatment. The use of this technique to degrade and mineralize the Amaranth Red Dye, can be implemented as a more appropriate alternative than other traditional oxidation processes. Objective: To study heterogeneous catalysis of Amaranth Red dye, by the use of a sun light collector and titanium oxide as a catalyst. Materials and methods: For the photocatalysis process, a composed cylinder parabolic sunlight collector (CPC) was used and the conditions under which the higher measurements of color removal were gotten were analyzed. The variables analyzed for this purpose were the concentration of the catalyst (TiO2), the hydrogen peroxide concentration and the relation between both of them before the degradation and mineralization of the color. Results:For this work synthetic solutions dyed with 100mg/L Amaranth Red color prepared with potable water. The most influent parameter on the degradation percentages reached, is the use of TiO2 mixed with hydrogen peroxide. The maximum degradation percentage obtained was 93.48% for titanium dioxide concentration of 150mg/L and 2 ml/L of hydrogen peroxide. Conclussion: The used of appropriate concentrations of TiO2 and H2O2 allows to obtain good degradation and mineralization percentages of the Amaranth Red Dye contained in water.
El desarrollo de productos como estrategia formativa de ingenieros de alimentos
(Corporación Universitaria Lasallista, 2004) Moncayo Castillo, Franco Alexis
Impacto social en los participantes del Programa de Educación Sanitaria en Manipulación de Alimentos y Convivencia Social
(Corporación Universitaria Lasallista, 2004) Alzate Tamayo, Luz María; Sandino Restrepo, María del Carmen
Introduction: Since 1997, the Engineering Program of Corporación Universitaria Lasallista has been developing a task of social projection, with the “Sanitary Education Program on Food Handling and Social Coexistence” addressed to parents from the 1st and 2nd stratification levels who work, mainly, in school restaurants, street food sales, domestic service work and social programs of community mothers. The program is financially supported by the Rodrigo Arroyave Arango Foundation since 1998. Objective: To measure the impact of this program among its participants. Materials and methods: To collect information, a survey was applied to the participants and an observation guide for the visits to school restaurants, community homes and other places, was used. Results: The program has had a great impact, because it has allowed an increase of the usual food handling practices, diminishing the risk of gastrointestinal diseases among the children from community homes and school restaurants. Further benefits were found, specially those related to self-confidence, the respect to others and tolerance to family and neighbors, increasing the quality of life of the participants and their families. Conclusion: The Corporación Universitaria Lasallista must keep on offering this program, making trough it a contribution to the reconstruction of social tissue in our region.
Impacto del manejo integral de los residuos sólidos en la Corporación Universitaria Lasallista
(Corporación Universitaria Lasallista, 2004) Castrillón Quintana, Olivia; Puerta Echeverri, Silvia María
Introduction: The environmental problems produced by the increase of solid wastes are due, partly, to a lack of education and environmental responsibility to separate them in the very source and use them again as raw material in the fabrication of new products. The Integral Management of Solid Waste (MIRS, in Spanish) contributes to the sustainable saving of natural resources. Objective: Evaluating the impact of the MIRS program in the Corporación Universitaria Lasallista. Methodology: The MIRS program was implemented and, later, the educational experiences and certain economic profits were evaluated. These profits include savings in the public cleanliness fees, the production of compost and the sale of recycling materials. Results: In 5 semesters developing the program $18´ 114.772 Colombian Pesos were saved in cleanliness fees, diminishing the the volume of waste for their final disposal. Other benefits included the production of compost and the sale of recycling materials. Conclusions: Implementing MIRS has been an excellent experience, due to the environmental education campaign in which all of the academic members have been involved, A special commitment has been kept by our students and faculty members from the SISMO Young Researchers Group and the General Services staff from Corporación Universitaria Lasallista.
Satisfacción de los graduandos con la formación recibida en la Corporación Universitaria Lasallista, marzo de 2004
(Corporación Universitaria Lasallista, 2004) Rodríguez Gázquez, María de los Ángeles
Introduction: The opinion of the university community is very important to establish a perception of the quality in the tuition received. The people which are just about to get their degrees are the ones who can be evaluated in the most sensitive way, under terms of satisfaction with their professors, deans, the course plans and the different academic and administrative processes which are pertaining to their studies. Objective: To evaluate the satisfaction rate of the alumni with the tuition received from Corporación Universitaria Lasallista, with the aim of obtaining useful information and define actions in order to increase the quality of the undergraduate programs. Materials and methods: A descriptive study was made, using as information collector a self-applied survey. The satisfaction was graded in values from 0 to 5 (0 for a total insatisfaction and 5 for a maximum satisfaction). The information was verted on a data base designed for the study, made with SPSS vr.11 software, and a statistical analysis was made by using the same software. Results: In general, a very good satisfaction level with tuition, professors and deans of the programs was registered. Conclussions: It is very satisfactory for Corporación Universitaria Lasallista that the alumni from March 2004 have an adequate satisfaction level with the tuition provided by the institution in their undergraduate studies.
La historia fascinante de un viaje por la aventura apasionante de aprender y aprenderse
(Corporación Universitaria Lasallista, 2004) Castrillón Quintana, Olivia
Los coleópteros y el compost
(2004) Arango Gutiérrez, Gloria Patricia; Vásquez Villegas, Erika María
Coleopteras are well known as among the coleoptera order we have the Scarabaideae and Sthaphylinaidae families that help to degradate the organic material, although there is not a thorough knowledge of the conditions under which they act. It is very important to obtain information on how to help to improve the quality of compost, because many benefits would be obtained in several aspects. The compost is of the best organic fetillizers that can be obtained in an easy way. Coleopteras can be present as one link of the alimentary chain, performing as decomposers or transformers of solid organic waste.
Una visión al mundo de la búsqueda y recuperación de la información electrónica
(Corporación Universitaria Lasallista, 2004) Echavarría Ramírez, Andrés Felipe
The increasing number of web sites and resources provided by internet has made the process of search and recovery of useful information for schooling and research more difficult. Even though the Net has extremely important sources, these are unknown for the majority of traditional search engines. This is what it is known as “The Deep Net”. To access this small universe of internet, it is necessary to know the mechanisms, strategies and tools that facilitates and guarantee the achievement of our objectives.
Ensilaje como fuente de alimentación para el ganado
(Corporación Universitaria Lasallista, 2004) Garcés Molina, Adelaida María; Berrío Roa, Lorena; Ruíz Alzate, Santiago; Serna D´León, Juan Guillermo; Builes Arango, Andrés Felipe
Ensilage is the anaerobic fermentation of soluble carbohydrates which are present in forages to produce lactic acid. This process allows the increase of the number of animals per hectare and replace or complement concentrated foods. Its quality is affected by the chemical composition of the substance that is going to be ensiled, the weather and the microorganisms used, among other factors. The silage is kept in special trenches that allow the anaerobic condition, there are several kinds and the criteria to choose the appropriate one depends of the kind of cattle exploitation, the economical resources available and the topography of the terrain, among other factors.
Fotocatálisis de aguas residuales de la industria textil utilizando colector solar
(Corporación Universitaria Lasallista, 2004) Garcés Giraldo, Luís Fernando; Peñuela Mesa, Gustavo Antonio
Introduction: Photocatalysis made with sun light appears as a simple and economic alternative to treat wastewater, colored with dyes from the textile industry. The use of this technology for the degradation and mineralization the 84 orange reactive dyes, can open a new route different from the traditional oxidation processes. Objective: To study the photocatalysis with TiO2 in colored wastewater using a sunlight collector. Materials and Methods: A sunlight collector made up by three modules (each one made up by eight glass Schott-Duran pipes) was used. Each glass pipe is 48 cm of external diameter and 150 cm long and also contains an aluminum sheet, which allows the reflection of sunlight. The whole device had a re-circulation bomb and a thank, the sunlight collector had an inclination of 6 degrees in comparison with the floor and was facing North because it must be located according to the geographic position of the place. Only one condition was modificated for each experiment with the objective of studying its influence in the dye’s degradation. In this research work we show different combinations of hydrogen peroxide, titanium dioxide and air, used in the photo catalysis of the 84 orange reactive and waste water samples from textile industry. Results: The optimal concentrations found for 84 orange reactive in a 340 mg/lL concentration are: 40 mg/L of titanium dioxide and 2 mg/L of hydrogen peroxide with no air injection. Conclusion: With an appropriate quantity of titanium dioxide and a well calculated concentration of hydrogen peroxide, very good concentration percentages of the 84 orange reactive and colored waste waters are obtained, besides of high mineralization percentages.

Browse

Browsing Revista LASALLISTA de Investigación by Issue Date

Results Per Page

Sort Options