• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 591
  • 5
  • 1
  • 1
  • Tagged with
  • 599
  • 340
  • 339
  • 328
  • 314
  • 209
  • 199
  • 79
  • 73
  • 61
  • 54
  • 51
  • 49
  • 47
  • 47
  • 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.
501

Crescimento e produ??o de feijoeiro originado de sementes com diferentes teores de f?sforo e molibd?nio sob diferentes fontes de nitrog?nio. / Growth and yield of common bean originated from seeds with different concentrations of phosphorus and molybdenum at different nitrogen sources.

Pacheco, Rafael Sanches 10 August 2010 (has links)
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-09-19T12:12:01Z No. of bitstreams: 1 2010 - Rafael Sanches Pacheco.pdf: 669093 bytes, checksum: 3ca2e98e7a5ac781dba791f2e1bfda70 (MD5) / Made available in DSpace on 2018-09-19T12:12:01Z (GMT). No. of bitstreams: 1 2010 - Rafael Sanches Pacheco.pdf: 669093 bytes, checksum: 3ca2e98e7a5ac781dba791f2e1bfda70 (MD5) Previous issue date: 2010-08-10 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico, CNPq, Brasil. / Nutrient concentration in the seeds can affect the initial development, biological nitrogen fixation (BNF) and yield of plants. Common bean (Phaseolus vulgaris L.) has been considered as a species with low capacity of BNF as compared to other grain legumes, but results demonstrate the potential of BNF to supply the N demand of the crop and to achieve adequate yields. The objective of this study was to evaluate the effect of seed concentrations of Mo and P on biomass production, nodulation and grain yield of common bean at different sources of N supply. The field experiment was conducted between April and July 2009, in the Santa Monica Farm of Embrapa Gado de Leite in the municipality of Valen?a ? Rio de Janeiro State. The experimental design was a split-plot 4x4 factorial randomized block with 5 replicates. The main plots consisted of four N sources: control without N, mineral N fertilization with 20 kg N ha-1 at sowing + 40 kg N ha-1 in cover, inoculation with the commercial strain of rhizobia, rhizobia inoculation + 40 kg N ha-1 in cover. The subplots consisted of four combinations between concentrations of P and Mo in the seeds (low P low Mo, low P high Mo, Mo high P low, high-P high-Mo). The seeds of cultivar Carioca were originating from a field experiment when 5 kg P ha-1 and 120 g Mo ha-1 were foliar sprayed at 52 and 71 days after emergence (DAE). In each subplot, plant biomass were sampled at 30, 42 and 57 DAE, and root, shoot and nodules dry mass, the number of nodules and the accumulation of N in the shoot were determined. Grains were harvested at 90 DAE, and grain yield, yield components, N and Mo concentratios in the grains were measured. Interactions between the N sources and the concentrations of P and Mo in the seeds were not significant in the three sampling times, except for shoot dry mass and number of nodules at 57 DAE. Seeds with low P and high Mo increased shoot dry matter and grain yield of beans. Mineral N fertilizer increased root mass in the early growth stages. The rhizobia inoculation increased bean nodulation. There was a small effect of the seeds with high P concentration in the accumulation of N and mass of shoots at 57 DAE. Mineral N fertilizer increased N accumulation in the shoots at 57 DAE. The inoculation + 40 kg N ha-1 in cover gave similar grain yield and N accumulation as the application of 60 kg N ha-1, both treatments superior to the control. The use of seeds enriched with P and Mo, associated with the inoculation of seeds and the application of N in cover, could maximize the process of biological nitrogen fixation in the common bean crop. / A concentra??o de nutrientes nas sementes pode afetar o desenvolvimento inicial, a fixa??o biol?gica de nitrog?nio (FBN) e a produ??o de gr?os das plantas por elas geradas. O feijoeiro (Phaseolus vulgaris L.) tem sido considerado uma esp?cie de baixa capacidade de FBN em compara??o com outras leguminosas de gr?o, mas resultados demonstram o potencial da FBN em suprir a demanda de N do feijoeiro e obter boas produtividades. O objetivo deste estudo foi avaliar o efeito dos teores de P e Mo em sementes na produ??o de biomassa, nodula??o e no rendimento de gr?os de feijoeiro sob diferentes fontes de fornecimento de N. O experimento foi conduzido em condi??es de campo entre abril e julho de 2009, na Fazenda Santa M?nica da Embrapa Gado de Leite, no munic?pio de Valen?a ? RJ, em delineamento em blocos ao acaso em fatorial 4x4 com 5 repeti??es em parcelas subdivididas. As parcelas foram compostas por quatro fontes de N: testemunha absoluta sem N; aduba??o com N mineral com 20 kg N ha-1 no plantio + 40 kg N ha-1 em cobertura; inocula??o com a estirpe comercial de riz?bio recomendada para a cultura; inocula??o com estirpe comercial + 40 kg N ha-1 em cobertura. As subparcelas foram compostas por quatro combina??es entre teores de P e de Mo na semente (baixo P baixo Mo, baixo P alto Mo, alto P baixo Mo, alto P alto Mo). As sementes da cultivar Carioca utilizadas foram oriundas de um experimento de campo onde foram efetuadas aplica??es foliares com 5 kg P ha-1 e 120 g Mo ha-1 aos 52 e 71 dias ap?s emerg?ncia (DAE). Em cada subparcela foram efetuadas tr?s amostragens de biomassa, aos 30, 42 e 57 DAE, determinando-se a massa seca de raiz, parte a?rea e n?dulos, o n?mero de n?dulos e a acumula??o de N na parte a?rea. A colheita de gr?os foi efetuada aos 90 DAE, determinando-se o rendimento de gr?os, os componentes de produ??o e o teor de N e de Mo nos gr?os. As intera??es entre as fontes de N e os teores de P e Mo das sementes, nas tr?s ?pocas de coleta, n?o foram significativas, exceto para massa seca de parte a?rea e n?mero de n?dulos aos 57 DAE. As sementes com baixo P e alto Mo foram as que promoveram maior massa de parte a?rea e tamb?m a maior produ??o de gr?os de feij?o. A aduba??o com N mineral promoveu maior massa radicular nos est?gios iniciais de crescimento. A inocula??o das sementes com riz?bio aumentou a nodula??o do feijoeiro. Houve um pequeno efeito dos altos teores de P nas sementes na acumula??o de N e de biomassa da parte a?rea aos 57 DAE. A aplica??o de N mineral promoveu maior ac?mulo da N na parte a?rea aos 57 DAE. A inocula??o combinada com 40 kg N ha-1 em cobertura forneceu rendimento de gr?os e acumula??o de N nos gr?os similar ? aplica??o de 60 kg N ha-1, por sua vez superiores ? testemunha. O uso de sementes enriquecidas com P e Mo, associada com a inocula??o de sementes e a aplica??o de N em cobertura, podem maximizar o processo de fixa??o biol?gica de nitrog?nio na cultura do feijoeiro.
502

A Aplica??o de Boas Pr?ticas: Uma Contribui??o para a Atualiza??o das Compet?ncias nos Curr?culos dos Cursos T?cnico em Agropecu?ria e Agroind?stria do IFTM ? Campus Uberl?ndia. / In this work was studied the contribution of Good Agricultural and Manufacturing Practices in the acquisition of abilities proposed by the curriculum of the Agriculture and Livestock Technical Course and Agroindustry Technical Course of Federal Institute of Tri?ngulo Mineiro- Uberl?ndia Campus (IFTM-Uberl?ndia Campus). An interdisciplinary proposal was applied to the production of vegetables destined to the consumption in the sector of feeding and nutrition of the Institution. 20 students from the Agriculture Technical course and 17 from the Agroindustry Technical course from IFTM-Uberl?ndia Campus. It was used as the object of work for the pedagogical evaluation planting of lettuce, one in the conventional way and another with the application of Good Agricultural Practices. In the evaluation of the pedagogical process, the method of evaluation of individual attitude was used, constructing relative affirmative questions to the main phases of development of the steps that made this work (process and its controls and microbiological analyses). The evaluation tools contained affirmations referring to the concepts and necessary knowledge to understand the good stages that involve the process of the good practical. These were punctuated with a scale ranging from ?I disagree very much? to ?I agree very much?, with a total of seven points. These were applied in two different stages, being first the representative one of zero condition, which is, without any involvement with the activities of the project and second, after concluding the practical activities. For each plantation, 50 randomly harvested heads of lettuce were selected. The samples of each plantation (conventional and GAP) and each processing (conventional and GMP), after the collection, were transported to the laboratory of Food Microbiological Analyses of the IFTM- Uberl?ndia Campus, where Total and Fecal Coliforms were analyzed. The diagnostic tests on the knowledge in GAP and GMP presented average above 6 for the four evaluated groups, but there was an increase in the values of notes of the evaluations, after the applied training. However, the results did not present significant statistical differences between the groups, both in the first and in the second moment in relation to the knowledge level on GAP and GMP. This result can e justified, because the study had the limitation to a small sample. In the analysis of images of subjects at different stages of labor was observed cooperation and organization of the group leaders with the creation of better performance of the activities. The present work allowed the academic knowledge to the applied research. It was possible to follow the construction of the knowledge of the students and researcher, which was accomplished by means of the principles that support interdisciplinary practices, who contribute to the formation of citizens critical and participative.

Rosa, M?rcia de Freitas 08 October 2010 (has links)
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-09-19T14:22:57Z No. of bitstreams: 1 2010 - M?rcia de Freitas Rosa.pdf: 8558207 bytes, checksum: 084652082b79dd99a23b5994dc3364e1 (MD5) / Made available in DSpace on 2018-09-19T14:22:57Z (GMT). No. of bitstreams: 1 2010 - M?rcia de Freitas Rosa.pdf: 8558207 bytes, checksum: 084652082b79dd99a23b5994dc3364e1 (MD5) Previous issue date: 2010-10-08 / In this work was studied the contribution of Good Agricultural and Manufacturing Practices in the acquisition of abilities proposed by the curriculum of the Agriculture and Livestock Technical Course and Agroindustry Technical Course of Federal Institute of Tri?ngulo Mineiro- Uberl?ndia Campus (IFTM-Uberl?ndia Campus). An interdisciplinary proposal was applied to the production of vegetables destined to the consumption in the sector of feeding and nutrition of the Institution. 20 students from the Agriculture Technical course and 17 from the Agroindustry Technical course from IFTM-Uberl?ndia Campus. It was used as the object of work for the pedagogical evaluation planting of lettuce, one in the conventional way and another with the application of Good Agricultural Practices. In the evaluation of the pedagogical process, the method of evaluation of individual attitude was used, constructing relative affirmative questions to the main phases of development of the steps that made this work (process and its controls and microbiological analyses). The evaluation tools contained affirmations referring to the concepts and necessary knowledge to understand the good stages that involve the process of the good practical. These were punctuated with a scale ranging from ?I disagree very much? to ?I agree very much?, with a total of seven points. These were applied in two different stages, being first the representative one of zero condition, which is, without any involvement with the activities of the project and second, after concluding the practical activities. For each plantation, 50 randomly harvested heads of lettuce were selected. The samples of each plantation (conventional and GAP) and each processing (conventional and GMP), after the collection, were transported to the laboratory of Food Microbiological Analyses of the IFTM- Uberl?ndia Campus, where Total and Fecal Coliforms were analyzed. The diagnostic tests on the knowledge in GAP and GMP presented average above 6 for the four evaluated groups, but there was an increase in the values of notes of the evaluations, after the applied training. However, the results did not present significant statistical differences between the groups, both in the first and in the second moment in relation to the knowledge level on GAP and GMP. This result can e justified, because the study had the limitation to a small sample. In the analysis of images of subjects at different stages of labor was observed cooperation and organization of the group leaders with the creation of better performance of the activities. The present work allowed the academic knowledge to the applied research. It was possible to follow the construction of the knowledge of the students and researcher, which was accomplished by means of the principles that support interdisciplinary practices, who contribute to the formation of citizens critical and participative. / Neste trabalho foi estudada a contribui??o das Boas Pr?ticas Agr?colas e de Fabrica??o na aquisi??o de compet?ncias propostas pelas matrizes curriculares dos Cursos T?cnicos em Agropecu?ria e Agroind?stria do Instituto Federal do Tri?ngulo Mineiro-Campus Uberl?ndia (IFTM-Campus Uberl?ndia). Foi utilizada uma proposta interdisciplinar aplicada ? produ??o de hortali?as folhosas destinada ao consumo no Setor de Alimenta??o e Nutri??o da Institui??o. Participaram da pesquisa 20 estudantes do Curso T?cnico em Agropecu?ria e 17 do Curso em Agroind?stria do IFTM-Campus Uberl?ndia. Utilizou-se como objeto de trabalho para a avalia??o pedag?gica o plantio de alface, sendo um na forma convencional e outro com a aplica??o das Boas Pr?ticas Agr?colas. Na avalia??o do processo pedag?gico, utilizou-se o m?todo de avalia??o de atitude do indiv?duo, construindo-se quest?es afirmativas relativos ?s principais fases de desenvolvimento das etapas que compuseram este trabalho (processo e seus controles e an?lises microbiol?gicas). Os instrumentos de avalia??o continham afirmativas referentes aos conceitos e conhecimentos necess?rios para compreender as etapas que envolvem o processo das boas pr?ticas. Estas foram pontuadas com uma escala variando entre o ?discordo muito? ao ?concordo muito?, com um total de sete pontos. Esses foram aplicados em duas etapas diferentes, sendo a primeira representativa da condi??o zero, ou seja, sem qualquer envolvimento com as atividades do projeto e a segunda, ap?s concluir as atividades pr?ticas. Utilizou-se ainda, an?lise das imagens dos sujeitos nas diferentes etapas do trabalho. Para cada plantio foram selecionados 50 p?s de alface, colhidos aleatoriamente. As amostras de cada plantio (convencional e BPA) e cada processamento (convencional e BPF), ap?s a coleta, foram transportadas para o Laborat?rio de An?lises Microbiol?gicas de Alimentos do IFTM-Campus Uberl?ndia, onde foram realizadas as an?lises de Coliformes a 35?C e Coliformes a 45?C. Os testes diagn?sticos sobre os conhecimentos em BPA e BPF apresentaram notas m?dias superiores a 6 para os quatro grupos avaliados, houve um aumento nos valores das notas das avalia??es, ap?s o treinamento aplicado. Entretanto, os resultados n?o demonstraram diferen?as estat?sticas significativas entre os grupos, tanto no primeiro quanto no segundo momento em rela??o ao n?vel de conhecimento sobre BPA e BPF. Esse resultado pode ser justificado, uma vez que o estudo teve a limita??o quanto ao pequeno tamanho da amostra. Na an?lise das imagens dos sujeitos nas diferentes etapas do trabalho foi observada a coopera??o e a organiza??o do grupo com a cria??o de lideres melhorando o desempenho das suas atividades. O presente trabalho permitiu vincular o conhecimento acad?mico ? pesquisa aplicada. Foi poss?vel acompanhar a constru??o do conhecimento por parte dos estudantes e pesquisador, que se efetivou por meio dos princ?pios que embasam a pr?tica interdisciplinar, os quais contribuem para a forma??o de cidad?os cr?ticos e participativos.
503

Avalia??o do potencial antioxidante e antimicrobiano de prote?nas do soro de leite concentradas por membranas e hidrolisadas por diferentes enzimas comerciais / Evaluation of potential antioxidant and antimicrobial activities of whey proteins concentrated by membranes and hydrolyzed by different commercial enzymes

SOUZA, Renata Silva Cabral de 23 May 2013 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-11-29T17:12:51Z No. of bitstreams: 1 2013 - Renata Silva Cabral de Souza.pdf: 1753830 bytes, checksum: 2dff8752eb3f7974e34f8809d059f126 (MD5) / Made available in DSpace on 2018-11-29T17:12:51Z (GMT). No. of bitstreams: 1 2013 - Renata Silva Cabral de Souza.pdf: 1753830 bytes, checksum: 2dff8752eb3f7974e34f8809d059f126 (MD5) Previous issue date: 2013-05-23 / CAPES / The aim of this study was to evaluate the process of protein concentration in bovine whey proteins by ultrafiltration process and subsequently the protein hydrolysate obtained by enzymatic hydrolysis to produce bioactive peptides with potential antimicrobial and antioxidant activities. For concentration process was used a ceramic ultrafiltration membrane with a molecular range cut-off of 10-20 kDa, transmembrane pressure of 5 bar and, temperature of 30 ?C, 40 ?C and 50 ?C . The optimum temperature condition was at 40 ?C. The Volume Concentrate Factor (VCF) parameter was used as a end-point of the ultrafiltration process and fixed at 2, corresponding on concentrating the initial volume twice, in volume. At the temperature of 40 ?C, VCF had a correspondence on final protein concentration on the concentrated fraction by ultrafiltration and confirmed by Bradford method. Two commercial enzymes were tested Alcalase, Flavourzyme and an equivalent mixture of both 50:50 (w/w) in the hydrolysis reaction. The hydrolysis conditions were determined according to manufacturer instructions and confirmed by other studies: 60 ?C and pH 8 for Alcalase; 50 ?C and pH 7 for Flavourzyme; 50 ?C and pH 8 for enzyme mixture with enzyme / substrate ratio (w / w) 5/100 for all enzymes. The reaction was monitored by pH Stat method. The final Degree of Hydrolysis (DH) achieved was 15%, 52% and 63% for Flavourzyme, Alcalase and enzyme mixture, respectively. Five aliquots were collected along the hydrolysis for each enzyme reaction corresponding to differents DH in order to evaluatethe antioxidant activity by ORAC and ABTS assays with final values between 597- 1092 m? TE (ABTS) and from 1615 to 2920 ?M TE (ORAC) for Flavourzyme; 998-6290 ?M TE (ABTS) and 3092-7567 ?M TE ( ORAC) for Alcalase and finally 913-2678 ?M TE (ABTS) and 2547-5903 ?M TE (ORAC) for the enzyme mixture. The samples from all hydrolysates showed no antimicrobial activity against strains of Salmonella choleraesuis subsp. Enteritidis (ATCC 13076) and Listeria monocytogenes (ATCC 9117). / A proposta do presente trabalho foi avaliar a concentra??o das prote?nas do soro de leite bovino por ultrafiltra??o e posterior obten??o de hidrolisados proteicos deste concentrado via hidr?lise enzim?tica visando obter pept?deos bioativos com potencial atividade antimicrobiana e antioxidante. Para concentra??o das prote?nas do soro foi utilizada membrana cer?mica de ultrafiltra??o com massa molar de corte de 10-20 kDa, press?o aplicada ? membrana de 5 bar, temperaturas testadas (30 ?C, 40 ?C e 50 ?C) . A temperatura ?tima selecionada foi de 40 ?C. O Fator de Concentra??o Volum?trica foi o par?metro utilizado para indicar o final do processo de ultrafiltra??o sendo fixado em duas vezes o volume inicial da alimenta??o. Na temperatura de 40 ?C foi obtida correspond?ncia entre a concentra??o volum?trica e a concentra??o proteica final na fra??o retida pela UF, que tamb?m foi o dobro da encontrada na fra??o alimenta??o, avaliada pelo m?todo de Bradford. Foram testadas duas enzimas comerciais: Alcalase, Flavourzyme e uma mistura equivalente de ambas, na propor??o 50:50 (m/m) na rea??o de hidr?lise. As condi??es de rea??o enzim?tica foram determinadas de acordo com instru??es do fabricante e corroboradas por outros estudos em: 60 ?C, pH 8 para Alcalase; 50 ?C, pH 7 para Flavourzyme; 50 ?C, pH 8 para mistura enzim?tica e rela??o enzima/substrato (g/g) foi de 5/100 para todas as enzimas. A rea??o de hidr?lise foi monitorada pelo m?todo pH Stat. Os Graus de Hidr?lise (GH) finais alcan?ados foram de 15 %, 52 % e 63 % para Flavourzyme, mistura enzim?tica e Alcalase, respectivamente. Foram coletadas cinco al?quotas correspondentes a diferentes GH ao longo da rea??o para cada condi??o enzim?tica utilizada e avaliadas quanto a atividade antioxidante pelos m?todos ABTS e ORAC tendo valores entre 597 a 1092 ?M TE (ABTS) e 1615 a 2920 ?M TE (ORAC) para Flavourzyme, 998 a 6290 ?M TE (ABTS) e 3092 a 7567 ?M TE (ORAC) para Alcalase e por fim, 913 a 2678 ?M TE (ABTS) e 2547 a 5903 ?M TE (ORAC) para a mistura enzim?tica. Nenhuma das amostras de hidrolisado com diferentes GH apresentou atividade antimicrobiana contra cepas de Salmonella choleraesuis subsp. Enteritidis (ATCC 13076) e Listeria monocytogenes (ATCC 9117).
504

Educa??o ambiental e o tratamento de ?gua: uso do sistema de tratamento de ?gua baseado em ultravioleta em C?mpus do Instituto Federal do Maranh?o e sua rela??o com a constru??o de conhecimentos / Education environment and water treatment: use of water treatment system based on ultraviolet on Campus of the Instituto Federal do Maranh?o and its relation with the construction of knowledge

SILVA, Ivaldo Jos? da 21 March 2013 (has links)
Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-11-29T17:27:43Z No. of bitstreams: 1 2013 - Ivaldo Jos? da Silva.pdf: 36618657 bytes, checksum: 428b35f4aa0bf23daa7adf9b14b4e7ef (MD5) / Made available in DSpace on 2018-11-29T17:27:43Z (GMT). No. of bitstreams: 1 2013 - Ivaldo Jos? da Silva.pdf: 36618657 bytes, checksum: 428b35f4aa0bf23daa7adf9b14b4e7ef (MD5) Previous issue date: 2013-03-21 / Research in Environmental Education Criticizes aims to construct and reflective critique of knowledge allowing individuals greater contextualisation-environmental relations and consequent changes, in attitudes towards collective transformation of reality. The municipality of Z? Doca, regional pole of Turi, located east of the State of Maranh?o, in the Northeast region near the border with the State of Par?, is responsibility to articulate educational actions, political and economic, social and environmental development of over 17 other municipalities in the region. It was found that municipalities the environmental sanitation and water treatment is performed unsatisfactorily and precarious, signaling the need for sustained research-driven actions on the principles of education Wake up in the population capable environmental more questioning and intervention in the local reality. This research aimed to instigate critical knowledge construction to allow greater local perception of reality, associated with insertion technique feasibility research, Community research, alternative technology of water treatment based on ultraviolet radiation-UV Tube. The Methodological development used by this social research was action research procedures where awareness, dynamic cooking workshops, adaptation and installation of UV Tube, meetings and other educational practices addressed the theme of water treatment, social issues, environment and health, among other correlated in a participative manner, reflective and harmonic among respondents and researchers. The search area was chosen as the community of rural settlement good hope, located in Z? Doca, where were installed and evaluated 05 (five) UV Tube units. Data collection took place 64 (sixty-four) interviews and questionnaires applied before the dynamics of awareness and at the end of the whole educational process in order to identify improvement in the perception of the community in relation to the subject dealt with and the local reality, and consequential changes in attitudes. The treatment of data collected in the questionnaires presented variables that were tested with the non-parametric test of Chi-square and other calculated averages of answers with their respective standard deviations and their minimum and maximum values. The results indicated favourable conditions for the adaptation and insertion of the UV tube technology showing economic viability and operational compared to similar projects successfully installed in other countries, especially the acceptance of the proposal and the ease of access to the materials needed to manufacture of UV Tube. As the analysis of educational activities related to the thematic discussion addressed significant responses were expansions and modifications in order to understand the local reality criticizes pointing, including changes to posture that assisted the search for better quality of life for the community. It is concluded that the implementation of concrete action of insertion of the UV Tube use, Dialogic and critical process of construction of knowledge based on the intrinsic relationship between action and reflection associated with the permissive criticizes of knowledge built by researched and researchers was the recipe to achieve the objectives of the survey. / A pesquisa em Educa??o Ambiental Cr?tica visa ? constru??o reflexiva e cr?tica de conhecimentos, permitindo aos indiv?duos maior contextualiza??o das rela??es socioambientais e consequentes mudan?as de atitudes voltadas para transforma??o coletiva da realidade. O munic?pio de Z? Doca, p?lo regional do Alto Turi, localizado a leste do Estado do Maranh?o, pr?ximo a divisa com o Estado do Par? ? respons?vel em articular a??es educacionais, socioambientais, pol?ticas e econ?micas para o desenvolvimento de mais 17 outros munic?pios da regi?o. Verificou-se que nestes munic?pios o saneamento ambiental e, principalmente, o tratamento de ?gua, s?o realizados de forma insuficiente e prec?ria, sinalizando a necessidade de a??es orientadas por pesquisas sustentadas nos princ?pios de uma Educa??o Ambiental capaz de despertar na popula??o maior problematiza??o e interven??o na realidade local. Esta pesquisa objetivou instigar a constru??o de conhecimentos cr?ticos aptos a permitirem maior percep??o da realidade local associada ? investiga??o da viabilidade t?cnica de inser??o, junto ? comunidade pesquisada, de tecnologia alternativa de tratamento de ?gua baseado em radia??o ultravioleta ? Tubo UV. Para o desenvolvimento metodol?gico esta pesquisa social utilizou-se de procedimentos da pesquisa-a??o em que din?micas de sensibiliza??o, oficinas de confec??o, adapta??o e instala??o do Tubo UV, reuni?es e outras pr?ticas educacionais abordaram a tem?tica do tratamento de ?gua, as quest?es sociais, ambientais e de sa?de, entre outras correlacionadas de forma participativa, reflexiva e harm?nica entre pesquisados e pesquisadores. Como ?rea de pesquisa foi escolhida a comunidade do assentamento rural Boa Esperan?a - ABE, localizada em Z? Doca onde foram instalados e avaliados 05 (cinco) unidades do Tubo UV. Para coleta de dados foram realizadas 64 (sessenta e quatro) entrevistas e aplicados question?rios antes das din?micas de sensibiliza??o e ao final de todo o processo educativo, com objetivo de identificar melhoria na percep??o da comunidade em rela??o ? tem?tica abordada e a realidade local, al?m de consequentes mudan?as de atitudes. O tratamento dos dados coletados nos question?rios apresentou vari?veis que foram analisadas com o teste n?o param?trico do Qui-Quadrado e outras, calculadas as m?dias de respostas com seus respectivos desvios padr?es e seus valores m?nimos e m?ximos. Os resultados indicaram condi??es favor?veis ? adapta??o e inser??o da tecnologia do Tubo UV apresentando viabilidade econ?mica e operacional comparada a projetos id?nticos instalados com sucesso em outros pa?ses, destacando-se a aceita??o da proposta e a facilidade de acesso aos materiais necess?rios a confec??o do Tubo UV. Quanto a an?lise das a??es educativas relacionadas a discuss?o da tem?tica abordada registraram-se significativas respostas de amplia??es e modifica??o na forma cr?tica de perceber a realidade local apontando, inclusive, mudan?as de postura que auxiliaram a busca de melhor qualidade de vida para comunidade. Conclui-se que a realiza??o da a??o concreta da inser??o do uso do Tubo UV, em processo dial?gico e cr?tico de constru??o de conhecimento pautado na rela??o intr?nseca entre a??o e reflex?o associada ? permissiva cr?tica dos saberes constru?dos por pesquisados e pesquisadores foi a receita para alcan?ar os objetivos da pesquisa.
505

Uso de modelos i* para enriquecer requisitos em m?todos ?geis

Jaqueira, Aline de Oliveira Prata 01 March 2013 (has links)
Made available in DSpace on 2014-12-17T15:48:06Z (GMT). No. of bitstreams: 1 AlineOPJ_DISSERT.pdf: 1977050 bytes, checksum: f61ea891da8fcdd8f7fc75d704edb944 (MD5) Previous issue date: 2013-03-01 / The activity of requirements engineering is seen in agile methods as bureaucratic activity making the process less agile. However, the lack of documentation in agile development environment is identified as one of the main challenges of the methodology. Thus, it is observed that there is a contradiction between what agile methodology claims and the result, which occurs in the real environment. For example, in agile methods the user stories are widely used to describe requirements. However, this way of describing requirements is still not enough, because the user stories is an artifact too narrow to represent and detail the requirements. The activities of verifying issues like software context and dependencies between stories are also limited with the use of only this artifact. In the context of requirements engineering there are goal oriented approaches that bring benefits to the requirements documentation, including, completeness of requirements, analysis of alternatives and support to the rationalization of requirements. Among these approaches, it excels the i * modeling technique that provides a graphical view of the actors involved in the system and their dependencies. This work is in the context of proposing an additional resource that aims to reduce this lack of existing documentation in agile methods. Therefore, the objective of this work is to provide a graphical view of the software requirements and their relationships through i * models, thus enriching the requirements in agile methods. In order to do so, we propose a set of heuristics to perform the mapping of the requirements presented as user stories in i * models. These models can be used as a form of documentation in agile environment, because by mapping to i * models, the requirements will be viewed more broadly and with their proper relationships according to the business environment that they will meet / A atividade de engenharia de requisitos ? vista nos m?todos ?geis como atividade burocr?tica tornando o processo menos ?gil. No entanto, a falta de documenta??o no ambiente de desenvolvimento ?gil ? apontada como um dos principais desafios da metodologia. Assim, observa-se a exist?ncia de um contrassenso entre o que a metodologia ?gil defende e o resultado que ocorre no ambiente real. Por exemplo, nos m?todos ?geis as hist?rias de usu?rio s?o a forma mais usual para descrever requisitos. No entanto, essa maneira de descrever requisitos ainda n?o ? suficiente, pois as hist?rias de usu?rio constituem um artefato muito restrito para representar e detalhar os requisitos. As atividades de verificar quest?es como o contexto do software e depend?ncias entre as hist?rias tamb?m s?o limitadas com o uso somente desse artefato. No contexto de engenharia de requisitos existem as abordagens orientadas a metas que trazem vantagens para a documenta??o de requisitos, entre elas, completude dos requisitos, an?lise de alternativas e suporte ? racionaliza??o de requisitos. Dentre essas abordagens destaca-se a t?cnica de modelagem i* que fornece uma vis?o gr?fica dos atores envolvidos no sistema e suas depend?ncias. Esta disserta??o prop?e um recurso complementar para diminuir essa car?ncia de documenta??o existente nos m?todos ?geis. Assim, o objetivo deste trabalho ? fornecer uma vis?o gr?fica dos requisitos do software e seus relacionamentos atrav?s de modelos i*, enriquecendo assim os requisitos nos m?todos ?geis. Para isso prop?e-se um conjunto de heur?sticas para realizar o mapeamento dos requisitos representados como hist?rias de usu?rio em modelos i*. Esses modelos poder?o ser utilizados como uma forma de documenta??o dos requisitos no ambiente ?gil, pois atrav?s do mapeamento para os modelos i*, os requisitos ser?o visualizados de maneira mais abrangente e com seus devidos relacionamentos de acordo com o ambiente de neg?cio que v?o atender
506

Medi??o de desempenho organizacional nas imobili?rias: um estudo na cidade do Natal-RN

Ribeiro, Jo?o Maria Montenegro 19 May 2006 (has links)
Made available in DSpace on 2014-12-17T15:53:12Z (GMT). No. of bitstreams: 1 JoaoMariaMR.pdf: 348399 bytes, checksum: fa0b19b3fa026bdbff4a3c9463313a2d (MD5) Previous issue date: 2006-05-19 / The purpose of this paper is to identify how real estate companies from the city of Natal measure their organizational performance. Traditionally these companies measure their performance using financial measures; however, the technological improvement, the internationalization of the economy and the change in consumer behavior all demand better products and services, and other measuring models. Those changes motivate organizations to continually improve the quality of their products and services. In this way, these companies need to associate their financial results to their global performance. Therefore, it is necessary to have organizational performance models that associate financial and non-financial measures to the strategies of the companies. The research also tries to identify which performance indicators are used by these companies, as well as to test a model who questions: a) if there is any relationship between managers? characteristics and performance measuring systems? characteristics; b) if there is any relationship between the company s characteristics and the characteristics of the measuring system used to evaluate its organizational performance and c) finally to verify if there is a relationship between the characteristics of the measuring system and the company s performance. The information which served as a basis for the study was obtained through an empirical research, with questionnaires, answered by 66 (sixty six) companies from the city of Natal, capital of the state of Rio Grande do Norte. The results show that none of the companies investigated use any of the performance measurement models proposed in the modern literature. However, they use on an isolated way some of the measures those models, including some measures from adopted in the Balanced Scorecard, as well as the benchmarking process, making comparisons with the performance of their competitors. The research also reveals that either bigger companies, companies with more experienced managers or with better performance show better performance measurement systems / Objetiva identificar como as imobili?rias da cidade do Natal medem seu desempenho organizacional. Tradicionalmente, as empresas avaliam o desempenho de seus processos, basicamente, utilizando medidas financeiras; por?m, o avan?o tecnol?gico, a internacionaliza??o da economia e a mudan?a no comportamento do consumidor exigem produtos e servi?os cada vez melhores, al?m de outros conjuntos de medi??o. Tais modifica??es motivam as organiza??es ? cont?nua melhoria da qualidade de seus produtos e servi?os. Nesse sentido, as empresas precisam associar os seus resultados financeiros ao seu desempenho global, necessitando, portanto, de modelos de avalia??o de desempenho organizacional, que associem medidas financeiras e n?o-financeiras ? estrat?gia das empresas. A pesquisa tamb?m procura responder quais os indicadores de desempenho utilizados por essas empresas, bem como testar um modelo conceitual, que questiona: a) se existe rela??o entre as caracter?sticas dos gestores e as caracter?sticas dos sistemas de medi??o; b) se existe rela??o entre as caracter?sticas da empresa e as caracter?sticas do sistema de medi??o, utilizado para avaliar seu desempenho organizacional; e c) se existe rela??o entre as caracter?sticas dos sistemas de medi??o e o desempenho da empresa. As informa??es, tomadas como base para o estudo, foram obtidas por meio de uma pesquisa emp?rica, com question?rios, junto a 66 (sessenta e seis) empresas da cidade do Natal, capital do Estado do Rio Grande do Norte. Os resultados revelam que as empresas pesquisadas n?o utilizam nenhum dos sistemas de avalia??o de desempenho mais modernos, citados na literatura. Contudo, utilizam isoladamente algumas medidas desses modelos, entre as quais algumas adotadas no Balance Scorecard, bem como realizam o processo de benchmarking, por meio de compara??es com o desempenho de seus concorrentes. A pesquisa tamb?m revela que empresas que t?m seus gestores com mais experi?ncia, empresas maiores e com melhor desempenho apresentam sistemas de medi??o mais sofisticados
507

Doen?as respirat?rias associadas ? atividade de minera??o no munic?pio de Parelhas, regi?o do serid? norte-riograndense

Lima, Elis?ngela Maria de 26 February 2009 (has links)
Made available in DSpace on 2014-12-17T15:54:52Z (GMT). No. of bitstreams: 1 ElisangelaML.pdf: 3702195 bytes, checksum: 706cae0d6a157da81de334adcc48655b (MD5) Previous issue date: 2009-02-26 / This work aims to characterize the workers in mineral activities exposed to lung injuries in Parelhas Municipality, Rio Grande do Norte State, seeking to relate respiratory diseases to the mining activity. The studied area (Parelhas City), with about 19,700 inhabitants, is located in the Serido region, approximately 232 km far from Natal City. The number of people involved in informal mining activity (garimpo) in the Serid? region reaches about 5,000. These workers generally do not use any kind of individual protection equipments and develop, at early ages of greater productivity, severe forms of diseases, which end up disabling them to professional activities, family and social life. Deceases by respiratory problems (e.g. silicosis) have been reported in very young adults. A descriptive observational study was conducted based on information from the records found in Dr. Jos? Augusto Dantas Hospital, between the years 1996- 2006. The occupational and socio-economic features of the population, which was selected by using the hospital records, were achieved through individually answered forms. The purpose was to link the occupational activities with the respiratory diseases. The next stage of the research was an observational case-control study, in the 1:1 proportion. The achieved data allowed confirming the central hypothesis of the research, which states that the pneumoconiosis cases are due to the mineral-based activities in the studied area. The final step of the investigation tried to assess the knowledge of relatives of students in public and private elementary and high schools from Parelhas City, regarding silicosis. About 15.4% of urban schools were analyzed through application of a structured questionnaire. The results show distinct socio-economic levels and a difference in the perception of the relatives of students in public and private schools, concerning silicosis. It was possible to identify the characteristics of the population economically involved with mineral-based activities and to define the group that deserves preferential attention in preventive actions. The work indicates some environmental problems caused by inadequate mining operations in the region / O presente trabalho tem por objetivo a caracteriza??o de trabalhadores em atividades de base mineral expostos aos danos pulmonares, no Munic?pio de Parelhas/RN, buscando relacionar as patologias respirat?rias que mais se manifestam nesta popula??o a atividades de base mineral. A ?rea estudada (cidade de Parelhas) localiza-se no Serid? oriental norte-riograndense a aproximadamente 232 km de Natal com cerca de 19.700 habitantes. A quantidade de pessoas envolvidas na atividade informal de minera??o (garimpo) na regi?o do Serid? norte-riograndense chega a cerca de 5.000. Esses trabalhadores em geral n?o utilizam equipamentos de prote??o individual (EPIs) de qualquer esp?cie e desenvolvem, na faixa et?ria de maior produtividade, formas graves da doen?a, que acabam incapacitando-os para atividades profissionais, vida familiar e social, existindo relatos de mortes por problemas respirat?rios (silicose, por exemplo) em adultos muito jovens. Foi realizado estudo observacional do tipo descritivo transversal, a partir de informa??es sintomatol?gicas presentes nos prontu?rios do Hospital Dr. Jos? Augusto Dantas da cidade de Parelhas, entre os anos de 1996-2006. A caracteriza??o ocupacional e socioecon?mica da popula??o selecionada atrav?s dos prontu?rios foi feita atrav?s de aplica??o de formul?rios, respondidos individualmente e ap?s leitura do termo de consentimento livre e esclarecido (TCLE). Esta caracteriza??o objetivou vincular a atividade ocupacional com as patologias respirat?rias sofridas A etapa seguinte da pesquisa correspondeu a estudo observacional anal?tico do tipo casocontrole, na propor??o 1:1. Os dados obtidos possibilitaram a confirma??o da hip?tese central da pesquisa, de que os casos de pneumoconioses devem-se ? presen?a de atividades de base mineral na ?rea de estudo. Na fase final do trabalho, buscou-se avaliar o conhecimento da popula??o de familiares de estudantes do ensino fundamental e m?dio de escolas p?blicas e privadas do Munic?pio de Parelhas/RN referente ? silicose. Foram analisadas 15,4% das escolas urbanas, atrav?s da aplica??o de question?rio estruturado. Os resultados mostram distintos n?veis socioecon?micos e uma diferen?a na percep??o nos familiares de estudantes das escolas p?blica e privada, em rela??o ? silicose, permitindo identificar as caracter?sticas das popula??es economicamente envolvidas com atividades de base mineral e definir o grupo que mereceria aten??o preferencial em a??es preventivas. O trabalho possibilitou tamb?m apontar alguns problemas ambientais deixados pela inadequada explora??o mineral existente na
508

Doen?as de Veicula??o H?drica em Trechos da Bacia do Rio Piranhas-Assu: ocorr?ncia de bact?rias oportunistas, caracteriza??o epidemiol?gica e concep??es de professores e agentes de sa?de

Nascimento, Viviane Silva F?lix 07 February 2012 (has links)
Made available in DSpace on 2014-12-17T15:55:00Z (GMT). No. of bitstreams: 1 VivianeSFN_DISSERT.pdf: 1830875 bytes, checksum: cab92fad26402f8ffafa1b30a4f983b4 (MD5) Previous issue date: 2012-02-07 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Water is essential to life and all living organisms and their supply is necessary for economic development and quality of life of human populations, but their quality has been altered by human actions. In semi-arid northeast, the water is an issue of concern, especially its quality. This region is common to the construction of reservoirs that capture rain water, streams and temporary rivers in search of ease this situation, being intended for various purposes. Water scarcity is a limiting factor for the economic and social development of the region and contributes to the maintenance of waterborne diseases. About 80% of diseases that occur in developing countries are infected by waterborne pathogens. Therefore, this study aimed to determine in two environments that are part of semil?nticos Armando Ribeiro Gon?alves reservoir, and a stretch of the river Assu, all located in the semiarid RN, the occurrence of opportunistic pathogenic bacteria; check the conceptions of teachers and health workers about the issues "waterborne diseases" and "bacteria" and a diagnosis of diarrheal diseases that affect the population in some municipalities of the semi-arid region of RN from a survey of epidemiological data. For identification of bacteria using commercial kits and the diagnosis of diarrheal disease was based on information from databases. The previous conceptions of teachers and health workers were obtained through questionnaires. The results confirmed the presence of opportunistic bacteria in the studied area, showing the importance of monitoring water quality. There was an under-reporting of cases of diarrhea pointing out flaws in the monitoring of Diarrheal Diseases and indicating the need to improve it. It was felt also the need to implement educational activities on topics dealt with both with teachers and health workers, since they were identified misconceptions on the subject / A ?gua ? essencial ? vida e a todos os organismos vivos e o seu suprimento ? necess?rio para o desenvolvimento econ?mico e para a qualidade de vida das popula??es humanas, mas sua qualidade vem sendo alterada pelas a??es antr?picas. No semi?rido nordestino, a ?gua ? uma quest?o preocupante, especialmente a sua qualidade. Nessa regi?o ? comum a constru??o de reservat?rios, que captam ?guas de chuvas, c?rregos e rios tempor?rios, na busca de amenizar essa situa??o, sendo destinados para diversas finalidades. A escassez de ?gua ? limitante para o desenvolvimento econ?mico e social da regi?o e contribui com a manuten??o das doen?as de veicula??o h?drica. Cerca de 80% das doen?as que ocorrem em pa?ses em desenvolvimento s?o veiculadas pela ?gua contaminada por microrganismos patog?nicos. Nesse contexto, este trabalho objetivou determinar, em dois ambientes semil?nticos que fazem parte do reservat?rio Armando Ribeiro Gon?alves, e em um trecho do rio Assu, todos localizados no semi-?rido potiguar, a ocorr?ncia de bact?rias patog?nicas oportunistas; verificar as concep??es de professores e agentes de sa?de a respeito dos temas doen?as de veicula??o h?drica e bact?rias , e realizar um diagn?stico das doen?as diarr?icas que acometem a popula??o de alguns munic?pios do semi-?rido do RN a partir do levantamento de dados epidemiol?gicos. Para identifica??o das bact?rias utilizaram-se kits comerciais, e o diagn?stico das doen?as diarr?icas foi realizado com base em informa??es de bancos de dados. As concep??es pr?vias de professores e agentes de sa?de foram obtidas por meio da aplica??o de question?rios. Os resultados confirmaram a presen?a de bact?rias oportunistas nos ambientes estudados, evidenciando a import?ncia de vigil?ncia da qualidade da ?gua. Verificou-se uma sub-notifica?ao de casos de diarr?ias apontando falhas no Monitoramento das Doen?as Diarr?icas, e indicando a necessidade de aprimor?-lo. Percebeu-se, ainda, a necessidade de implementa??o de atividades educativas sobre os temas abordados, tanto com os professores como com os agentes de sa?de, uma vez que foram identificadas concep??es equivocadas sobre o tema
509

Flora e estrutura de remanescente de Floresta Estacional Decidual em Presidente Juscelino, MG.

Oliveira, Ana Carolina Ceron 15 February 2012 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-23T14:01:54Z No. of bitstreams: 5 17.pdf: 2865248 bytes, checksum: 30e82d4c4ee34e8a39b8c749441f52e8 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-10T11:24:03Z (GMT) No. of bitstreams: 5 17.pdf: 2865248 bytes, checksum: 30e82d4c4ee34e8a39b8c749441f52e8 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-10T11:24:03Z (GMT). No. of bitstreams: 5 17.pdf: 2865248 bytes, checksum: 30e82d4c4ee34e8a39b8c749441f52e8 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Este trabalho teve como objetivo conhecer a estrutura da comunidade arb?rea, diversidade, riqueza, as fun??es ecol?gicas das esp?cies, a influ?ncia das vari?veis ambientais, espaciais e os padr?es funcionais das esp?cies na distribui??o da vegeta??o em um fragmento de Floresta Estacional Decidual. O estudo foi conduzido em ?reas de reserva legal de propriedades particulares no munic?pio de Presidente Juscelino (MG), nas coordenadas 18?38?40?S e 44?04?57?W, com altitudes variando entre 600 e 890 m. O remanescente possui aproximadamente 150 ha, com relevo c?ncavo e declividades acentuadas. Foram observadas por??es ?reas com alto grau de dist?rbios antr?picos. H? evid?ncias de corte raso em uma faixa de vegeta??o, assim como de corte seletivo de algumas esp?cies de interesse comercial. Destaca-se tamb?m a exist?ncia de dist?rbios como, a alta compacta??o do solo gerada pela entrada de gado em algumas parcelas, clareiras naturais e antr?picas; solo exposto e trilhas ao longo do fragmento. Para o invent?rio florestal foram alocadas 25 parcelas permanentes de 20 ? 20 m (400 m?), totalizando ?rea amostral de 1 hectare. Nestas foram amostrados todos os indiv?duos arb?reos com circunfer?ncia ? altura do peito (CAP) > 15,7 cm, exceto lianas e indiv?duos mortos. As esp?cies amostradas foram classificadas em cinco sistemas de guildas (grupo ecol?gico, dispers?o, poliniza??o, toler?ncia ? desseca??o e densidade da madeira), a fim de formar grupos funcionais. Para a avalia??o das rela??es entre as vari?veis ambientais e a distribui??o do compartimento arb?reo, foram coletadas aleatoriamente no interior de cada parcela cinco amostras simples do solo superficial (0?20 cm), com cerca de 500 g de solo. Al?m do solo foram coletadas vari?veis de relevo, dossel e matriz de impacto (natural e antr?pico). Estas foram submetidas a uma An?lise dos Componentes Principais (PCA), onde apenas cinco das 28 vari?veis iniciais apresentaram alta correla??o: Calc?rio (Ca); Pot?ssio (k); Argila; rocha exposta e mat?ria org?nica. Tr?s das cinco esp?cies de maior valor de import?ncia apresentaram distribui??es diam?tricas relacionados com efeitos de resposta p?s-dist?rbio e a caracter?sticas da pr?pria esp?cie. Foi verificado um alto valor de H?, o que indica uma ?rea com diversidade relativamente alta e um baixo valor para J? e uma forte domin?ncia ecol?gica de esp?cies. Os resultados da an?lise de parti??o da vari?ncia a partir dos modelos de regress?o m?ltipla feita para cada eixo da an?lise NMDS mostraram que a distribui??o da vegeta??o est? altamente correlacionada com a estrutura espacial e ? influenciada em parte pelas vari?veis ambientais argila e mat?ria org?nica. A an?lise de classifica??o Twinspan definiu quatro grupos distintos entre as esp?cies avaliadas os quais se diferenciaram em rela??o ?s suas fun??es ecol?gicas. A compara??o da participa??o dos grupos de ordena??o da NMDS em rela??o aos grupos funcionais de classifica??o Twinspan, mostrou que a ?rea estudada apresenta um padr?o funcional dominado por esp?cies pioneiras a secund?rias iniciais, com dispers?o anemoc?rica e germina??o ortodoxa. O fragmento estudado encontra-se em um est?dio inicial de sucess?o secund?ria, onde as diferentes estrat?gias ecol?gicas das esp?cies ocuparam posi??es distintas ao longo do fragmento, apresentando tend?ncias adaptativas das esp?cies as condi??es do ambiente. Os resultados refor?am a hip?tese da grande import?ncia de conserva??o deste fragmento de Floresta Estacional Decidual. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT This study aimed to know the structure of the tree community, diversity, richness, the ecological functions of species, the influence of environmental variables, spatial and functional patterns of the species in the vegetation distribution in a fragment of Deciduous Forest. The study was conducted in areas of legal reserve of private properties in the municipality of President Juscelino (MG), at coordinates 18 ? 38'40 "S and 44 ? 04'57" W, with altitudes ranging between 600 and 890 m. The remainder has approximately 150 ha, with concave topography and steep slopes. Portions were observed areas with a high degree of human disturbance. There is evidence of clear-cutting in a strip of vegetation, as well as selective logging of some species of commercial interest. Also noteworthy is the existence of disorders such as high soil compaction caused by the entry of cattle in some parts, natural and anthropogenic clearings, exposed soil and trails along the fragment. For the forest inventory were allocated 25 permanent plots of 20 ? 20 m (400 m?), a total sample area of ??1 hectare. These were all sampled trees with circumference at breast height (CAP)> 15.7 cm, except lianas and dead individuals. The sampled species were classified into five systems guilds (ecological group, dispersion, pollination, desiccation tolerance and density of the timber) to form functional groups. To assess the relationships between environmental variables and distribution of tree compartment were collected randomly within each plot five single samples of surface soil (0-20 cm), with about 500 g of soil. Apart from the soil were collected relevant variables, canopy and impact matrix (natural and man-made). These were submitted to a Principal Component Analysis (PCA), where only five of the 28 initial variables were highly correlated: Limestone (Ca), Potassium (k), Clay, exposed rock and organic matter. Three of the five species of greatest importance value showed diameter distributions related to effects of disorder and post-response characteristics of the species itself. There was a high value H ', which indicates an area with relatively high diversity and a low value for J' and a strong predominance ecological species. The results of analysis of variance partitioning from the multiple regression models made for each shaft NMDS analysis showed that the distribution of vegetation is highly correlated with the spatial structure and is partly influenced by environmental clay and organic matter. The classification analysis Twinspan identified four distinct groups among the studied species which differ in relation to their ecological functions. The comparison of the participation of groups of NMDS ordination in relation to the functional group classification Twinspan showed that the study area presents a functional pattern dominated by pioneer species to early secondary, with orthodox anemochoric and germination. The fragment is studied in an early stage of secondary succession, where the different ecological strategies species occupied different positions along the fragment, present trends adaptive species environmental conditions. The results reinforce the hypothesis of the importance of conservation of this fragment Deciduous Forest.
510

Uso de composto org?nico e esp?cies do cerrado na revegeta??o de ?rea remanescente da extra??o de cascalho em Diamantina - MG / I use of organic compound and species of the thicket in the revegeta??o of remaining area of the gravel extraction in Diamantina - MG

Marques, Izabel Cristina 31 July 2012 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-01-23T14:01:54Z No. of bitstreams: 5 2.pdf: 1355294 bytes, checksum: 9086c9df4915c340a9a61b61dd236b86 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-10T11:34:25Z (GMT) No. of bitstreams: 5 2.pdf: 1355294 bytes, checksum: 9086c9df4915c340a9a61b61dd236b86 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) / Made available in DSpace on 2015-02-10T11:34:25Z (GMT). No. of bitstreams: 5 2.pdf: 1355294 bytes, checksum: 9086c9df4915c340a9a61b61dd236b86 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2109 bytes, checksum: aa477231e840f304454a16eb85a9235f (MD5) Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O objetivo do trabalho foi avaliar o efeito do uso de composto org?nico de ind?stria de fia??o e tecelagem sobre a qualidade do substrato e crescimento de esp?cies arb?reas do cerrado em uma cascalheira no munic?pio de Diamantina, MG. A disserta??o foi estruturada em quatro cap?tulos. O primeiro refere-se ? revis?o bibliogr?fica visando o entendimento dos conceitos que foram abordados no estudo. No segundo capitulo, a influ?ncia do composto no substrato foi avaliada por meio das altera??es nos atributos qu?micos (pH, mat?ria org?nica (MO), soma de bases (SB), CTC, satura??o por bases (V), f?sforo (P), pot?ssio (K), c?lcio (Ca2+), magn?sio (Mg2+), acidez troc?vel (Al3+), acidez potencial (H + Al) e satura??o por alum?nio (m)) e f?sicos (resist?ncia mec?nica a penetra??o (Rp) e granulometria) do substrato. Foi avaliada tamb?m a atividade microbiana: carbono da biomassa microbiana (CBM) respira??o microbiana (C-CO2) e quociente metab?lico (qCO2) ap?s aplica??o de cinco tratamentos: sem aplica??o de composto org?nico e diferentes concentra??es 0,0; 4,5; 9,0; 18,0 e 36,0 g dm-3 por cova. O delineamento foi sistem?tico tipo ?leque? sendo os tratamentos dispostos em tr?s blocos casualizados. A adi??o do composto proporcionou o aumento nos valores de pH, MO, SB, CTC, V e nutrientes (P, K, Ca2+ e Mg2+) e promoveu a redu??o de Al3+, H + Al e m. O substrato minerado apresentou valores elevados de Rp indicando a compacta??o na ?rea degradada pela extra??o de cascalho, mesmo ap?s a aplica??o do composto. A adi??o de doses crescentes do composto promoveu o aumento significativo de CBM e C-CO2 ao substrato minerado. O maior valor de qCO2 indicou efici?ncia da biomassa microbiana com a incorpora??o das menores doses do composto ao substrato quando comparado ao controle. O terceiro cap?tulo refere-se ao estudo do crescimento das esp?cies nativas Kielmeyera lathrophyton Saddi (Pau santo), Plathymenia reticulata Benth (Vinh?tico), Dalbergia miscolobium Benth (Jacarand? do cerrado) e Bowdichia virgilioides Kunth (Sucupira-preta) plantadas em delineamento sistem?tico tipo ?leque? submetidas a cinco tratamentos: sem aplica??o de composto org?nico e diferentes doses de composto 0,0; 4,5; 9,0; 18,0 e 36,0 g dm-3 por cova dispostos em tr?s blocos casualizados. Ap?s 12 meses, verificou-se que n?o houve diferen?a significativa entre os tratamentos para sobreviv?ncia e incremento em altura, di?metro e cobertura de copa para cada esp?cie. Ainda, de forma preliminar foi poss?vel determinar que a adi??o de 4,5 g dm-3 de composto na cova proporcionou maiores valores de incremento em altura, di?metro e cobertura de copa para Plathymenia reticulata e Bowdichia virgilioides. No quarto cap?tulo, foi realizado o plantio em linha de Chamaecrista debilis submetida a quatro tratamentos, 0,0; 30,0; 60,0 e 120,0 g dm-3 de composto como adubo por cova, dispostos em tr?s blocos casualizados. Os resultados indicaram que n?o houve diferen?a significativa entre as doses de composto aplicado para incremento em altura, di?metro e cobertura de copa. O maior valor de incremento em altura e cobertura de copa ocorreu sem a adi??o de composto de res?duo org?nico de ind?stria de fia??o e tecelagem e para di?metro com a aplica??o de 60,0 g dm-3, no entanto, ? necess?ria a realiza??o de avalia??es futuras. A taxa de sobreviv?ncia apresentou decr?scimo significativo com a aplica??o das maiores dosagens de composto org?nico. A esp?cie Chamaecrista debilis apresentou caracter?sticas importantes para recupera??o de ?rea degradada, como r?pido crescimento e produ??o de biomassa. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT The objective of the work was to evaluate the effect of the use of composed of organic residue spinning industry and weaving on the quality of the substratum and growth of arboreal species of the thicket in a gravol-pit in the municipality of Diamantina, MG. The dissertation was structured in four chapters. Being the first, regarding the bibliographical revision seeking the understanding of the concepts and theoretical questions of what was borded in the study. In the second I chapter, the influence of the compound in the substratum was evaluated through the alterations in the chemical attributes (pH, organic matter (MO), sum of bases (SB), CTC, saturation for bases (V), match (P), potassium (K), calcium (Ca2+), magnesium (Mg2+), exchangeable acidity (Al3+), potential acidity (H + Al) and saturation for aluminum (m)) and physical (mechanical resistance the penetration (Rp) and texture) of the substratum. As well as in the microbial activity of the same: carbon of the microbial biomass (CBM) microbial breathing (C-CO2) and metabolic quotient (qCO2) after application of five treatments: without application of organic composition and different concentrations 0; 4,5; 9,0; 18,0 and 36,0 g dm-3 for hole. The delineation was systematic type "fan" being the treatments disposed in three blocks unexpected. The addition of the compound stimulated the increase in the pH values, MO, SB, CTC, V and nutritious (P, K, Ca2+ and Mg2+) and it promoted the reduction of Al3+, H + Al and m. The mined substratum presented high values of Rp indicating the compactation in the area degraded by the gravel extraction, even after the application of the composed. The addition of growing doses of the compound promoted the significant increase of CBM and C-CO2 to the mined substratum. The largest qCO2 value indicated efficiency of the microbial biomass with the incorporation of the smallest dosages of the compound to the substratum when compared to the control. The third chapter, refers to the study of the growth of the native species Kielmeyera lathrophyton Saddi (sacred Wood), Plathymenia reticulata Benth (Vinh?tico), Dalbergia miscolobium Benth (Jacaranda of the Thicket) and Bowdichia virgilioides Kunth (Sucupira-black) planted in delineation systematic type " fan " submitted to five treatments: without application of organic composition and different doses of compound 0,0; 4,5; 9,0; 18,0 and 36,0 g dm-3 for hole disposed in three blocks unexpected. After 12 months, it was verified that there was not significant difference among the treatments for survival and increment in height, diameter and top covering for each species. Still, in a preliminary way it was possible to determine that the addition of 45 g dm-3 of compound of organic residue of textile industry in the hole stimulated larger increment values in height, diameter and top covering for Plathymenia reticulata and Bowdichia virgilioides. In the fourth chapter, the planting was made in line of Chamaecrista debilis submitted to four treatments, 0,0; 30,0; 60,0 and 120,0 g dm-3 compound dm-3 as fertilizer for hole, disposed in three blocks inexpected. The results indicated that there was not significant difference among compound applied for increment in height and diameter. The largest increment value in height and diameter happened without the addition and with the application of 60,0 g dm-3 of compound of organic residue of textile industry, however it is necessary the accomplishment of future evaluations. The survival rate presented significant decrease with the application of the largest doses of organic compund. The species Chamaecrista debilis presented important characteristics for recovery of degraded area, as fast growth and biomass production.

Page generated in 0.0381 seconds