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Copyright of Revista Ambiente e Água is the property of Revista Ambiente e Agua and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article presents a theoretical study on the degradation mechanism of dipyrone under basic stress. Dipyrone is a widely used medication in Brazil due to its analgesic, antipyretic properties, and low cost. However, there are still gaps in the studies on its degradation routes and mechanisms. Therefore, this study proposes the use of theoretical methods of electronic structure to obtain more information about these mechanisms, reducing costs and environmental impacts. Formation mechanisms were proposed for the impurities 4-methylaminoantipyrine (4-MAA) and 4-hydroxymethylaminoantipyrine (4-HMA), along with their respective transition states. The results obtained demonstrate the potential of theoretical chemistry in predicting degradation products of dipyrone. [Extracted from the article]

Copyright of Direito da Cidade is the property of Editora da Universidade do Estado do Rio de Janeiro (EdUERJ) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Brasileira de Engenharia Agricola e Ambiental - Agriambi is the property of Revista Brasileira de Engenharia Agricola e Ambiental and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We have reached a point in our history of occupation and exploitation of the earth in their ability to support shows signs of exhaustion clear, and urgent need to review the assumptions of economic growth, with a view to reaching satisfactory levels of human development and environmental conservation. Progress, advancement of science and technology as facilitators came to improve the lives of human beings, even if the quality of life is better with more dignity. The man's partner nature live in harmony, preserving humanity. The planet Earth has all the elements to offer quality. Humanity recklessly destroys. Demonstration of environmental degradation, neglect of society, defines all life today, the future of humanity. Intrinsically all leads to a single path of destruction. The analysis in the case study this article demonstrates that progress without responsibility is destructive. The social standards are not equal the other. Actions need to be made, the company can not close our eyes to environmental causes, which are always linked to social cause. The mismanagement of natural resources transformed into social chaos. Those who should execute the Laws, which is demanding that health spending, with education, security, are the same as destroying. We must propose actions that address the lives of people so unprotected, living a life degrading, but still has a smile to offer. Children living exposed to diseases that should have been radicalized. They live in a miserable world, even so, the time to dream of a world more beautiful and clean. The feeling of impunity is so great. Environmental Education? Saving the environment, if people who are included in this environment are struggling to survive? Humans, humiliated, devoid of values, may remember that the "future of the world is in the richness that nature provides? How to Educate a population so poor that preserves the environment, if they can not fight for their social rights? Garbage should not be housing for anyone, it is important to show how the destruction of the environment, contamination of soil, are detrimental to human life. Once destroyed return to nature is slow. The gases that vent from there damage to the entire ecosystem. [ABSTRACT FROM AUTHOR]

The increased intensity of land use and declining native vegetation in northeastern Brazil have led to degradation of natural resources and in particular to the decline of soil fertility.The present study aimed to assess changes in soil physical and chemical properties in secondary areas of native forest and pasture in the microregion of swamp Paraiban. Three areas were selected in the Engenho Mineiro property, whose land area was classified as Alfissol, and represented by pasture grass Brachiaria ssp which is being explorated for over 25 years with clear signs of degeneration and the other by a area of secondary native forest. The design was completely randomized in a split-plot with five replications. Soil samples were collected from 0-10, 10-20 and 20-30cm. Due to the unevenness of the area proceeded collect in line in curve level, 10.0m apart from each other. The physical attributes evaluated were: bulk density and particle, total porosity, degree of flocculation, and totality native clay, degree of flocculation, aggregate dry and wet mean weight diameter and determination of the distribution of macro and micro aggregates separated by dry and wet. For the chemical attributes were determined pH values in water and calcium, magnesium, phosphorus, potassium, aluminum, hydrogen + aluminum, and organic matter (OM) for the areas and depths studied. The soils of, in general, showed low fertility. From the results, i was found that changes in the the original coverage cause an increase in pH and reduction in organic matter content. The area cultivated with pasture presented higher values of soil density, density of particles and reduction of total porosity. The change in the vegetation cover influenced the values of macro and micro aggregates in the studied environments. The use of segmentation by the toposequence positions in the landascape, use and depths, to the determine soil degradation, was efficient in evaluating the different depths of it. The management system used causes changes in the soil physical and chemical attributes that contribute to the process of soil degradation.t [ABSTRACT FROM AUTHOR]