1000 resultados para Educació ambiental


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The occurrence and the effects of organotin compounds (OTs) have been studied since a long time, due to their widespread use and deleterious effects. Some OTs are used as pesticides in crops, or as biocides in antifouling paints, applied in the ship hulls to avoid attachment and growth of tube worms, mussels and barnacles. However, "nontarget" organisms may be exposed, resulting in the poisoning of biological system, originating mutations and sentencing species to extinction. In this work we reported a revision study on the history of OTs and the techniques developed for its assessment and control.

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Tot i que Catalunya és atractiva per fer-hi estudis superiors, només atraurem estudiants per la qualitat de les nostres universitats i per l'atractiu i la geografia de Barcelona. Si comparem les universitats de Catalunya i Escòcia, haurem de recordar que la Universitat d'Edimburg està entre les 50 millors del món. D'altra banda, a Escòcia es viu en anglès. Catalunya no atraurà tots aquells candidats que es mouen per estudiar en anglès

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El país ha de fer una aposta decidida per l'educació. No és només un problema de currículums; amb el mateix currículum formal tenim molts models escolars, uns de relativament bons i altres de dolents. Cal fer canvis profunds i ser més exigent en les condicions per accedir a la professió de mestre. Aptitud i actitud. S'han fet visites a Finlàndia, model de sistema educatiu i país innovador, per entendre com funciona allà l'educació. No podem pensar que sense canvis en els comportaments socials podem tenir un sistema educatiu similar. Podem tenir un bon sistema, però serà sempre diferent

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Environmental education is a big challenge in this century and the University has an important role to play in it. This paper presents a practical experience of environmental education in the university teaching at the University of Bahia. That experience involves the creation of an interdisciplinary group that has been developing research and teaching activities with interdisciplinary perspectives. The paper also discusses a methodology proposed by this group aiming to include environmental education in science teaching using social and cultural approaches.

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La present comunicació neix amb la voluntat d'ordenar i repensar les estratègies que disposa qualsevol educador que treballi des del cos per treure'n el màxim rendiment i així poder fer més eficient el costós procés d'avaluació, que tants mals de cap porta, al mestre d'educació física.

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In this work, a partial least squares regression routine was used to develop a multivariate calibration model to predict the chemical oxygen demand (COD) in substrates of environmental relevance (paper effluents and landfill leachates) from UV-Vis spectral data. The calibration models permit the fast determination of the COD with typical relative errors lower by 10% with respect to the conventional methodology.

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The main environmental impacts related to the gravel pits in the medium course of the Fluvià river have been assessed. In order to compute the global impact and index based on the numerical values of different impacts has been defined. This index is applied to different areas and the results reveal that the environmental impact expected for a gravel pit is high or moderate close to the main streams and low in the rest of the territory

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L'experiència que es presenta aquí s'ha portat a terme en un centre escolar de Girona. És un centre obert a la realitat social, que assumeix com a funció principal la formació de persones íntegres, amb l'objectiu de desenvolupar uns bons ciutadans i ciutadanes. És una escola sensibilitzada en l'educació en valors. La nostra intenció és la de donar a conèixer una pràctica realitzada per uns nois i unes noies de quart curs d'educació secundària, amb la intenció de potenciar actituds de cooperació, per estimular el compromís efectiu en la construcció d'una societat més justa

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Sugar cane cultivation in the State of São Paulo has expanded in the last years, with an annual production of 200•10(6) t in an area of 2.5• 10(6) hectares. The use of herbicides, pesticides and fertilizers in sugar cane plantations, together with deforestation of riparian vegetation, have caused impacts on the hydric resources of the adjacent areas. The aim of this work is to evaluate the influence of sugar cane plantations on streams in the central region of the State of São Paulo, studying 16 organochlorinated compounds and 7 metals (Cu, Fe, Cd, Zn, Mn, Cr and Ni) found in the sediments of 11 streams. The results show that there is a higher concentration of metals and organochlorinated compounds in streams without riparian vegetation when compared to forested areas.

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An alternative application of the humid sludge from the Passaúna WTP, located in Curitiba's metropolitan area, is proposed for concrete structures, partially replacing aggregates and cement. For the investigation, a reference concrete and four concrete mixtures with sludge were produced, and from these, two mixtures, containing 4% and 8% of sludge (m/m), were analyzed by different techniques: X ray fluorescence, X ray diffraction, thermo-gravimetric analysis, physicochemical analysis, compressive strength, etc. The properties were evaluated and the results indicate that the mixtures can be applied in different situations as cast structures for construction of concrete walls. Mixtures with more than 4% of sludge are restricted to applications where the workability of the concrete is not required, such as for residential pavements, sidewalks and stepping floors.

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This study is a result of undergraduate student participation in the Environmental Chemistry discipline provided by the Chemistry Institute/UFBA. The students were involved in the development of passive samplers, a project of the LAQUAM (Environmental Analytical Chemistry Laboratory). The students' residences and other neighborhoods were used to create a passive sampling network, allowing the measurement of atmospheric levels of pollutants in urban areas and in those under industrial influence. The assembly of the passive samplers, including impregnation of filters and chemical analysis were part of the students' practice tasks. The results were analyzed taking into consideration the Brazilian legislation.

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The presence of residues of the major groups of pesticides (organohalogen, organophosphorous, pyrethroids and organonitrogen) in representative samples of honey produced in Bauru (state of São Paulo, Brazil) was investigated from 1999 through2004. A multiresidue method was applied to honey samples to determine 48 pesticides with recoveries ranging from 76 to 95%. The limits of detection found were lower than 10 µg/kg for GC-MS-SIM. The results indicated that most pesticides found in the samples belonged to the organohalogen and organonitrogen groups. Residues of malathion were detected in almost all of the samples in high concentration.

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The environmental impact of detergents and other consumer products is behind the continued interest in the chemistry of the surfactants used. Of these, linear alkylbenzene sulfonates (LASs) are most widely employed in detergent formulations. The precursors to LASs are linear alkylbenzenes (LABs). There is also interest in the chemistry of these hydrocarbons, because they are usually present in commercial LASs (due to incomplete sulfonation), or form as one of their degradation products. Additionally, they may be employed as molecular tracers of domestic waste in the aquatic environment. The following aspects are covered in the present review: The chemistry of surfactants, in particular LAS; environmental impact of the production of LAS; environmental and toxicological effects of LAS; mechanisms of removal of LAS in the environment, and methods for monitoring LAS and LAB, the latter in domestic wastes. Classical and novel analytical methods employed for the determination of LAS and LAB are discussed in detail, and a brief comment on detergents in Brazil is given.

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This paper presents an ongoing investigation regarding ethical competence, protective factors, strengths of character and coping strategies analyzed in a sample of students in Early Childhood Education Degree from the University of Barcelona. Along with a theoretical study will be an observational study using standardized instruments and standardized, which include the VIA-IS questionnaire Seligman. With all that is expected to draw conclusions to improve the training of teachers in kindergarten, especially since the subjects of musical expression and body where they develop these skills ethics.

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Els objectius generals plantejats en aquest Treball Final de Màster són els següents: - Analitzar les possibilitats del “geoaching” com una eina educativa per al desenvolupament de les competències bàsiques en educació física. Per desenvolupar aquest objectiu s’ha començat fent una anàlisi sobre l’evolució de les TIC a l’educació i a l’Educació Física en particular, seguida d’una anàlisi de la pràctica del geocaching, per observar la seva contribució al desenvolupament de les competències bàsiques a l’educació secundària i al Batxillerat, buscar possibilitats de treball interdisciplinari a partir de la seva dinàmica i mostrar experiències reals d’aplicació d’aquesta eina en contextos educatius, tant a l’educació física com en altres àrees curriculars, així com altres experiències fora de contextos educatius. - Observar els coneixements que té del geocaching el professorat d’Educació Física a l’educació secundària del Baix Empordà i la seva possible aplicació. Per tal de poder desenvolupar aquest objectiu, s’ha creat un qüestionari el qual tots els professors d’Educació Física exercents en centres de secundària del Baix Empordà han hagut de respondre. Gràcies als resultats obtinguts s’han pogut observar i analitzar quins han estat aquests coneixements i opinions. - Dissenyar una proposta en forma d’Unitat Didàctica per Educació Física sobre orientació mitjançant el “geocaching” al Batxillerat. Aquest objectiu pretén assolir-se mitjançant el desenvolupament de tota una unitat didàctica per Educació Física, on s’utilitzi el geocaching com a eina per a treballar la orientació mitjançant les noves tecnologies. En aquest cas, els telèfons mòbils intel·ligents smartphones.