• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2
  • 1
  • Tagged with
  • 3
  • 3
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Construção de uma estrutura metodológica para Avaliação de Desempenho Ambiental (ADA) de indústrias sucroenergéticas: um estudo multicasos / Construction of a methodological structure for Environmental Performance Assessment (EPA) of suugarcane industries: a multicases study

Thomaz, André Gustavo de Brito [UNESP] 06 September 2017 (has links)
Submitted by André Gustavo de Brito Thomaz null (andre.gustavo21@terra.com.br) on 2017-09-26T19:56:25Z No. of bitstreams: 1 DISSERTAÇÃO_ANDRÉ_GUSTAVO_DE_BRITO_TOMAZ.pdf: 3364862 bytes, checksum: a4a2f4fc8b45e8bd1160e118cd54bcb7 (MD5) / Approved for entry into archive by Monique Sasaki (sayumi_sasaki@hotmail.com) on 2017-09-28T13:23:46Z (GMT) No. of bitstreams: 1 thomaz_agb_me_jabo.pdf: 3364862 bytes, checksum: a4a2f4fc8b45e8bd1160e118cd54bcb7 (MD5) / Made available in DSpace on 2017-09-28T13:23:46Z (GMT). No. of bitstreams: 1 thomaz_agb_me_jabo.pdf: 3364862 bytes, checksum: a4a2f4fc8b45e8bd1160e118cd54bcb7 (MD5) Previous issue date: 2017-09-06 / O objetivo desta pesquisa é apresentar um estudo multicasos sobre avaliação de desempenho ambiental baseada no potencial de toxicidade humana em três empresas (denominadas por empresa A, B e C) da indústria sucroenergética brasileira. Foi desenvolvido um índice, exclusivo para indústrias do setor sucroenergético, chamado indicador do potencial de toxicidade humana Ipth, onde os cálculos para obtenção do índice são formados por meio da ponderação do potencial de impacto de cada resíduo e subproduto gerado na fabricação de etanol e açúcar, pela cobertura geográfica relativa que podem alcançar e pela avaliação da destinação final realizada pela indústria. Identificou-se que na literatura especializada há poucos trabalhos relacionados à avalição do desempenho ambiental com base no potencial de toxicidade humana de indústrias do setor sucroenergético, bem como metodologias para avaliação do desempenho ambiental destas indústrias com o uso de indicadores de desempenho ambiental. O método desenvolvido pode ser aplicado para medir o impacto ambiental gerado por qualquer indústria do setor sucroenergético. Como resultados, os resíduos/subprodutos que apresentam maior potencial de toxicidade humana são: vinhaça (35,57%), torta de filtro (29,15%), cinzas da queima do bagaço (27,38%), gases provenientes da queima do bagaço (4,73%), representando 96,83% do total. A vinhaça é o subproduto com maior participação relativa na formação do índice Ipth, sendo para a empresa A de 89,73%, para a empresa B de 89,55% e para a empresa C de 89,24%. Apesar da grande quantidade de resíduos e subprodutos gerados, o resultado alcançado é favorável às empresas estudadas. O índice Ipth resultou em 93,97% para a empresa A, em 93,62% para a empresa B e em 93,37% para a empresa C, demonstrando que as empresas A, B e C apresentam, respectivamente, 93,97%, 93,62% e 93,37% de práticas ambientalmente adequadas à destinação dos seus resíduos e subprodutos. / The objective of this research is to present a multi-case study on the evaluation of environmental performance based on human toxicity potential in three companies (denominated by company A, B and C) of the Brazilian sugarcane industry. Was developed an index, exclusively for industries of the sugarcane industry, called the human toxicity potential indicator Ipth, where the calculations for obtaining the index are formed by weighing the impact potential of each residue and by-product generated in the manufacture of ethanol and sugar, by the relative geographic coverage they can achieve And by the evaluation of the final disposal by the industry. It was identified that in the specialized literature there are few studies related to the environmental performance assessment based on the human toxicity potential of sugarcane industry industries, as well as methodologies to evaluate the environmental performance of these industries with the use of environmental performance indicators. The method developed can be applied to measure the environmental impact generated by any industry in the sugarcane sector. As results, the residues / by-products with the highest human toxicity potential are: vinasse (35.57%), filter cake (29.15%), bagasse burning ashes (27.38%), gases from burning Of the bagasse (4.73%), representing 96.83% of the total. Vinasse is the by-product with the highest relative participation in the formation of the Ipth index, with company A of 89.73%, company B of 89.55% and company C of 89.24%. Despite the large amount of waste and by-products generated, the result achieved is favorable to the companies studied. The Ipth index resulted in 93.97% for company A, 93.62% for company B and 93.37% for company C, showing that companies A, B and C have, respectively, 93.97% %, 93.62% and 93.37% of practices that are environmentally appropriate to the destination of their residues and by-products.
2

Development of Sensitive In Vitro Assays to Assess the Ocular Toxicity Potential of Chemicals and Ophthalmic Products

McCanna, David January 2009 (has links)
The utilization of in vitro tests with a tiered testing strategy for detection of mild ocular irritants can reduce the use of animals for testing, provide mechanistic data on toxic effects, and reduce the uncertainty associated with dose selection for clinical trials. The first section of this thesis describes how in vitro methods can be used to improve the prediction of the toxicity of chemicals and ophthalmic products. The proper utilization of in vitro methods can accurately predict toxic threshold levels and reduce animal use in product development. Sections two, three and four describe the development of new sensitive in vitro methods for predicting ocular toxicity. Maintaining the barrier function of the cornea is critical for the prevention of the penetration of infections microorganisms and irritating chemicals into the eye. Chapter 2 describes the development of a method for assessing the effects of chemicals on tight junctions using a human corneal epithelial and canine kidney epithelial cell line. In Chapter 3 a method that uses a primary organ culture for assessing single instillation and multiple instillation toxic effects is described. The ScanTox system was shown to be an ideal system to monitor the toxic effects over time as multiple readings can be taken of treated bovine lenses using the nondestructive method of assessing for the lens optical quality. Confirmations of toxic effects were made with the utilization of the viability dye alamarBlue. Chapter 4 describes the development of sensitive in vitro assays for detecting ocular toxicity by measuring the effects of chemicals on the mitochondrial integrity of bovine cornea, bovine lens epithelium and corneal epithelial cells, using fluorescent dyes. The goal of this research was to develop an in vitro test battery that can be used to accurately predict the ocular toxicity of new chemicals and ophthalmic formulations. By comparing the toxicity seen in vivo animals and humans with the toxicity response in these new in vitro methods, it was demonstrated that these in vitro methods can be utilized in a tiered testing strategy in the development of new chemicals and ophthalmic formulations.
3

Development of Sensitive In Vitro Assays to Assess the Ocular Toxicity Potential of Chemicals and Ophthalmic Products

McCanna, David January 2009 (has links)
The utilization of in vitro tests with a tiered testing strategy for detection of mild ocular irritants can reduce the use of animals for testing, provide mechanistic data on toxic effects, and reduce the uncertainty associated with dose selection for clinical trials. The first section of this thesis describes how in vitro methods can be used to improve the prediction of the toxicity of chemicals and ophthalmic products. The proper utilization of in vitro methods can accurately predict toxic threshold levels and reduce animal use in product development. Sections two, three and four describe the development of new sensitive in vitro methods for predicting ocular toxicity. Maintaining the barrier function of the cornea is critical for the prevention of the penetration of infections microorganisms and irritating chemicals into the eye. Chapter 2 describes the development of a method for assessing the effects of chemicals on tight junctions using a human corneal epithelial and canine kidney epithelial cell line. In Chapter 3 a method that uses a primary organ culture for assessing single instillation and multiple instillation toxic effects is described. The ScanTox system was shown to be an ideal system to monitor the toxic effects over time as multiple readings can be taken of treated bovine lenses using the nondestructive method of assessing for the lens optical quality. Confirmations of toxic effects were made with the utilization of the viability dye alamarBlue. Chapter 4 describes the development of sensitive in vitro assays for detecting ocular toxicity by measuring the effects of chemicals on the mitochondrial integrity of bovine cornea, bovine lens epithelium and corneal epithelial cells, using fluorescent dyes. The goal of this research was to develop an in vitro test battery that can be used to accurately predict the ocular toxicity of new chemicals and ophthalmic formulations. By comparing the toxicity seen in vivo animals and humans with the toxicity response in these new in vitro methods, it was demonstrated that these in vitro methods can be utilized in a tiered testing strategy in the development of new chemicals and ophthalmic formulations.

Page generated in 0.0621 seconds