Últimos itens adicionados do Acervo: Universidade Federal dos Vales do Jequitinhonha e Mucuri

A Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) é uma universidade pública brasileira sediada na cidade de Diamantina, estado de Minas Gerais, no Brasil. Foi criada em 6 de setembro de 2005.

Página 11 dos resultados de 339 itens digitais encontrados em 0.003 segundos

‣ Produ??o de madeira de eucalipto em propriedades rurais no Alto Jequitinhonha ? MG

Souza, Alberto Pereira de
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT Studies evaluating the technical processes of eucalyptus plantation by small and medium forest farmers at Alto Jequitinhonha region, in the northeast part of the state of Minas Gerais, are rare, even though this state has one of the largest eucalyptus areas in Brazil. The participation of farmers has been prominent in recent years, increasing the social benefits of eucalyptus plantation, as it had been traditionally planted by large forest companies so far. This study aimed to evaluate the forestry practices employed by these farmers in comparison to the best practices adopted by traditional companies, by estimating cost x benefit relation of forestry as a complementary business, based on the procedures carried out by these farmers under different technological options. The population covered by this study was represented by 583 farmers from Alto Jequitinhonha, who registered a document called ?Harvest statement?, as required by the state agency ?Instituto Estadual de Florestas?, between January 2008 and October 2009. From these, 71 farmers were randomly selected to answer a questionnaire addressing data such as the origin of species, spacing, rotation, the main silvicultural practices, harvesting and commercialization strategies employed. The same variables from a large regional forestry company were evaluated and used as reference. Data collected was analyzed by using descriptive statistics. It was found that farmers of Alto Jequitinhonha owns a very significant planted area with Eucalyptus urophylla and E. Cloesiana...

‣ Proposta de indicadores para a avalia??o de projetos de restaura??o de ecossistemas no Alto Jequitinhonha

Silveira, Carlos Jose Andrade
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The State Forestry Institute of Minas Gerais (IEF) promotes fomenting by seeking forest recovery or restoration in conjunction with rural producers. From 2007 to present date, it reached approximately 50,000 hectares in development projects with the protective bias. The techniques used in forest development projects are the promotion or induction of natural regeneration, the enrichment trough seedlings and when it is necessary, the plantation of the whole area with seedlings of native tree species from the region. To assess whether these restore recovery actions are reaching their goals, whether the resources invested in these actions are being well employed, or even if it will be necessary some rearrangement in the taken actions, it was necessary to evaluate and monitor the restored areas within the program scope. Before this effort, the monitoring of these worked areas allows that the development program assess the improvement rates in order to make them more effective. This study aims to suggest an assessment methodology of the restoration projects of the forest development program, guided by principles, criteria and indicators, seeking to verify the trends of successful projects. 19 projects were randomly visited in the municipalities of Concei??o do Mato Dentro...

‣ Turfeiras da Serra do Espinha?o Meridional: mapeamento e estoque de mat?ria org?nica

Silva, M?rcio Luiz da
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
A Serra do Espinha?o Meridional - SdEM, nascente do Rio Jequitinhonha e de importantes afluentes dos Rio S?o Francisco e Doce, possui litologias predominantemente quartz?ticas e ? caracterizada por apresentar ?reas dissecadas entremeadas a superf?cies de aplainamento, onde, nas depress?es, ocorrem as turfeiras, grandes reservat?rios de mat?ria org?nica e de ?gua. A turfeira pode ser definida como um substrato constitu?do por restos de vegetais mortos, em diferentes est?gios de decomposi??o, que se acumulam em sucess?o em lugares ?midos ou encharcados onde haja uma consider?vel redu??o na atividade biol?gica devido ?s in?spitas condi??es do meio. ? formada pelo ac?mulo em sucess?o de restos vegetais, em locais que apresentam condi??es que inibem a atividade de microrganismos decompositores, como excesso de umidade, baixo pH, escassez de oxig?nio e temperaturas amenas. Outro papel importante reservado para as turfeiras ? sua utiliza??o como arquivo ambiental e cronol?gico da evolu??o das paisagens, das mudan?as clim?ticas e da deposi??o atmosf?rica de metais pesados, em escala regional ou mesmo global. O objetivo deste trabalho foi mapear as turfeiras da por??o norte da SdEM, determinar seu estoque de mat?ria org?nica armazenada e utilizar is?topos de carbono para identificar mudan?as ambientais regionais que ocorreram no Quatern?rio. Turfeiras pr?-selecionadas foram mapeadas atrav?s de trabalhos de campo e de t?cnicas de geoprocessamento e sensoriamento remoto...

‣ 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
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
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...

‣ Caracteriza??o de ?reas em Diamantina (MG) sob diferentes tipos de degrada??o: substrato, din?mica da vegeta??o e paisagem; Dynamics of shrub tree vegetation colonizing areas under different types of degradation in Diamantina, MG

Amaral, Wander Gladson
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT Anthropogenic activities have been meeting with the paradox of development and conservation. Thus the demand for raw materials to sustain the means of production, is closely related to the exploitation of natural resources, which conducted improperly and unsustainable, causes the degradation of the environment. In this context, aa scientific community, facing the challenges that present themselves to a sustainability of the planet, has been conducting research aimed at generating alternatives for the recuperation of degraded areas; these alternatives, which are effective in their purpose (integration of knowledge silvicultural and ecological principles ) and return these areas to conditions similar to the originals. This study aimed to characterize physical and chemical substrate, to relate the abundance distribution of the colonizing species with environmental variables, to study the dynamics of the floristic composition of vegetation and analyze the dynamics of the landscape around the three areas under different types preterit of degradation, between the years 1950 and 2006, emphasizing the changes in landscape virtue to human activities in the State Park Biribiri (PEB) and surroundings, in Diamantina, MG. The communities of areas degraded by mining diamond (ADGD) and gold (ADGO)...

‣ Sele??o e propaga??o de duas esp?cies do g?nero hymenaea; Selection and propagation of two species of the genus Hymenaea

Souza, Priscila Fernandes de
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The objective of this study was to evaluate the patterns of phenotypic variation in two species of the genus Hymenaea, in relation to biometric characteristics of fruits and seeds, germination and seedling production. And also at analyzing the germination of seeds submitted to subzero temperatures and suggest to apply a methodology to assess such behavior over time. The fruits used in this study were collected from matrices of jatoba proceeding from Curvelo-MG and Diamantina-MG. The experiments were conducted in the Integrated Center for Forest Research and Studies ICFRS/UFVJM in Diamantina-MG. Whose works were divided into three chapters. In the first fruits were collected from five matrices of Hymenaea courbaril and seven matrices of Hymenaea matiana. Were evaluated forty nine fruits by matrices and the following variables: weight of the fruits and seeds, length, width and thickness. These fruits were evaluated randomly one hundred seeds by matrix as length, width and thickness. Was also held by the seed germination test matrix by matrix and evaluated the growth of seedlings of these species. There were significant differences for all variables between species and matrices. Demonstrating, the possibility to select specific matrices under a particular interest. In the second chapter...

‣ Fitorremedia??o por esp?cies arb?reas de solo contaminado com herbicida clomazone: efeito na morfologia, anatomia e rizosfera.

Cabral, C?ssia Michelle
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
O crescimento da popula??o mundial ocasiona alta na demanda por alimentos. O processo produtivo gera importante montante de res?duos que funcionam como fontes poluidoras de ?gua, solo e ar. Anualmente s?o usados no mundo aproximadamente 2,5 milh?es de toneladas de agrot?xicos. Dentre estes se encontra o clomazone, do grupo das isoxazolidinonas, um inibidor da s?ntese de caroten?ides e altamente lixivi?vel. De acordo com a problem?tica apresentada objetivou-se com este trabalho verificar a toler?ncia, por meio de avalia??es de crescimento, intoxica??o, an?lises anat?micas e de diversidade microbiana do solo, assim como a capacidade remediadora de doze esp?cies florestais nativas. Para montagem do experimento foi utilizado o delineamento em blocos ao acaso com quatro repeti??es. Foram feitas 3 aplica??es do herbicida clomazone com intervalos de 20 dias (aos 60, 80 e 100 dias ap?s o plantio), cada aplica??o foi correspondente ? metade da dose comercial de 2 L ha-1. Para as avalia??es de crescimento foram mensuradas a altura da planta, o di?metro do caule, o n?mero de folhas, a ?rea foliar e o ac?mulo de biomassa seca. Para as verifica??es anat?micas foram coletadas 2 folhas de cada planta sempre aos 7 dias ap?s a aplica??o do herbicida...

‣ An?lise genetica de matrizes de caryocar brasiliense utilizando marcadores moleculares microssat?lite

Godinho, Thalyta Fernandes
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
Considerado como um ?hotspot? mundial de biodiversidade, o Cerrado apresenta alta abund?ncia de esp?cies end?micas e possui mais de 11.627 esp?cies de plantas nativas j? catalogadas. Dentre elas, o pequizeiro (Caryocar brasiliense), esp?cie que possui grande import?ncia ambiental e social neste bioma. A expans?o da fronteira agr?cola e a intensiva explora??o do Cerrado, por?m, t?m colocado em risco a preserva??o e a variabilidade gen?tica da esp?cie. Al?m disso, o extrativismo intensivo do pequizeiro pode gerar perdas de material gen?tico, j? que quase todos os frutos de qualidade, oriundos de gen?tipos superiores, s?o coletados. Dessa forma, o objetivo do presente trabalho foi analisar o banco de matrizes de pequi, utilizando marcadores moleculares microssat?lites, com fins de melhoramento e conserva??o da esp?cie. Para a extra??o do DNA gen?mico, foram utilizadas amostras foliares de 20 matrizes de Caryocar brasiliense, das quais 16 oriundas do Parque Estadual do Rio Preto (S?o Gon?alo do Rio Preto ? MG) e as demais oriundas da Fazenda Experimental da UFVJM ? Campus Moura (Curvelo ? MG). Para a amplifica??o do DNA, foram testados dez oligonucleot?deos espec?ficos para o pequi. Ap?s a amplifica??o, os fragmentos de DNA foram separados em gel desnaturante de poliacrilamida 10% e ureia 6 M em TBE 1x.A partir da leitura dos g?is gerou-se uma matriz bin?ria em que os indiv?duos foram genotipados quanto ? presen?a (1) e aus?ncia (0) de bandas. Com essa matriz...

‣ Efeito de subst?ncias h?micas extra?das da mat?ria org?nica de turfeiras e de composto org?nico de res?duos da ind?stria t?xtil na reten??o de ?gua

Freire, Rafaela Dias de Arag?o
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
A mat?ria org?nica do solo (MOS) relaciona-se intimamente com a capacidade de reten??o de ?gua pelo solo. As turfeiras e os compostos org?nicos s?o materiais ricos em MOS. O objetivo do trabalho foi quantificar a capacidade de reten??o de ?gua da humina (H) e dos ?cidos h?micos (AH) da mat?ria org?nica (MO) de turfeiras e de composto org?nico proveniente de res?duos da ind?stria t?xtil, puros e em mistura com areia. O fracionamento dos materiais seguiu uma adapta??o da metodologia da Internacional Humic Substances Society. Obtiveram-se os substratos advindos das seguintes propor??es de subst?ncias h?micas (SH), provenientes de turfeira e de composto, e areia (fina e m?dia): 0 % SH e 100 % de areia fina (AF) e m?dia (AM); 100 % SH e 0 % de areia AF ou AM; 75 % SH e 25 % AF ou AM; 50 % SH e 50 % AF ou AM; 25 % SH e 75 % AF ou AM. Com o aux?lio do extrator de Richards foram determinados os teores de ?gua retida nas tens?es de 0 (CMRA), 10, 100, 300, 500, 700 kPa, para todos os substratos. Foi feita a an?lise de vari?ncia. N?o se observou diferen?as estat?sticas entre substratos com 100 % de AF e AM. Analisando-se as diferen?as de reten??o de ?gua dos substratos com 100% de AH e da H, e as diferen?as de origem (composto e turfeira), encontrou-se as maiores reten??es para os substratos com AH e para os substratos com SH provenientes de turfeira. A humina ? a SH que predomina amplamente no composto de res?duos de industria t?xtil e de turfeira. A maior reten??o de ?gua...

‣ Efeito da degrada??o ambiental e do fluxo de corrente em comunidades meiofaunais de um ecossistema l?tico no cerrado brasileiro

Ara?jo, Thiago Quint?o
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
A qualidade da ?gua vem sendo alterada pelo crescimento populacional, industrial e outras atividades antr?picas, onde se retira ?gua dos mananciais e retorna, ao meio ambiente, res?duos l?quidos n?o tratados, alterando drasticamente a sua qualidade. Al?m disso, essa degrada??o ambiental pode potencializar ainda mais os efeitos dos dist?rbios naturais sobre todo ecossistemas aqu?ticos. Os microinvertebrados aqu?ticos s?o um grupo de organismos que possuem uma resposta eficiente e r?pida a essas altera??es, uma vez que seus ciclos de vida s?o relativamente curtos e possuem baixa mobilidade. Eles s?o compostos por organismos de at? 2mm e possuem como representantes diversos grupos, dentre eles Gastrotricha, Rotifera, Copepoda e Tardigrada. Esses organismos n?o s?o comumente utilizados em estudos de monitoramento de qualidade de ?gua doce, mesmo sendo facilmente encontrados em ambientes l?nticos e l?ticos.Assim, o presente trabalhotem como objetivo estudar o efeito da degrada??o ambiental e da varia??o do fluxo de correnteza sobre comunidades microinvertebrados de ?gua doce em ambientes l?ticos no Parque Estadual do Rio Preto, MG (PERP) e em seu entorno. Al?m disso,objetivou-se demonstrar sua poss?vel utiliza??o como bioindicador de qualidade de ?gua...

‣ Influ?ncia do espa?amento e da idade na produ??o de biomassa e na rota??o econ?mica em plantios de eucalipto; Influence of spacing and the age on biomass production and economic rotation in eucalypt plantations

Paulino, Erik J?nior
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The objective of this work was to study the effect of planting spacing and time in the production of biomass in the economic rotation, and dendrometric variable and stand variables of a stand of eucalyptus clonal. The experiment was performed in areas of the company APERAM BIOENERGIA in the city of Itamarandiba, MG, using a randomized block design. The plots consisted of five spacing initial (3.0 x 0.5 m, 3.0 x 1.0 m, 3.0 x 1.5 m, 3.0 and 3.0 x 2.0 x 3.0 m) and measurements were performed at 7, 12, 18, ??24, 48, 61, 77, 85 and 102 months. From the information collected in the field were estimated for each treatment the volume and biomass per hectare, density, calorific value, and other dendrometric variable and stand variables. It was found that the spacing and age influence significant on the values ??of average diameter, height total, basal area, volume total per hectare, biomass per hectare, density and calorific value. The growth in volume per hectare in the biomass per hectare and basal area per hectare was directly related to planting density, and the higher values ??for the smaller spacing. On the other hand the average diameter and total height of the trees were negatively correlated with the density. The specific gravity tends to increase with age and with the spacing of the trees. And the calorific value tends to rise with age and with the planting spacing. The spacing did not influence the survival rate of trees. The technique rotation and economic rotation occurred earlier in smaller plantings spaced. For all spacing the technique age cutting was higher than the economic age cutting. The spacing of 3.0 x 1.5 proved to be a more attractive option according to the criteria net present value and equivalent periodic benefit...

‣ Estrutura e volume de povoamento de um remanescente de Floresta Estacional Semidecidual em Curvelo, MG.

Franco, St?nio Abdanur Porf?rio
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT This study aimed to know the structure and floristic composition of woody compartment of a remnant of semideciduous forest, as well as determine the stand volume by applying regression models and use of artificial neural networks. The remnant has approximately 162 hectares and is located on the Experimental Moura?s Farm in Curvelo, MG, which were systematically allocated 25 plots of 400 m? (10 X 40 m), and all the individuals of the woody compartment who had bole with a DBH ? 5 cm were recorded values?? of DBHs, total height and bole, and categorical attributes related to the sanity and tortuosity of the boles. Were sampled 1105 individuals in 114 species, 41 families and 91 genera. The values? ?found for the index of Shannon Weaver diversity and evenness were 3.91 and 0.82 respectively. By volume analysis, it was found that models that use basal area and the average height as independent variables have rough estimates to quantify the stand volume, being indicated for this purpose. Similarly, the methodology of artificial neural networks also proved to be efficient in quantifying the volume of native forests in the conditions of this study, by the test and significance level adopted. The association of categorical variables to continuous in the input layers of neural networks generated...

‣ Estrutura, composi??o flor?stica e rela??o vegeta??o-ambiente do compartimento arbustivo-arb?reo de cerrado.; Emergence and seedling growth of?arrays Caryocar brasiliense Camb. under different environmental conditions

Otoni, Thiago Jos? Ornelas
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT This study aimed to know the structure, floristic composition and environment-vegetation relationship in communities of different woody vegetation types of the Cerrado. The fragments are located in the Experimental Farm in Curvelo Moura, MG (cerrado sentido restrito ? 18,84? S e 44,39??W; cerrad?o-cerrado sentido restrito transition ? 18?82??S e 44?25??W; average elevation of 715 m), climate under the K?ppen Aw and on substrate of dystrophic and acids. The forest inventory was conducted by means of rectangular permanent quadrats (20 ? 50 m) with an area of ??1000 m?. For natural regeneration (RN), we used sub?-plots with an area of ??100 m? (2 ? 50 m) installed in the center of each plot. Thirty sample units were installed in the area of ??cerrado sensu stricto (fifteen to vegetation and fifteen adult to RN) and ten units in the area of ??dense cerrad?o-cerrado sentido restrito transition. The adult compartment was represented by all individuals living within the plots with diameter at soil height (DSH - diameter to 0.3 m from ground level) >?5.0 cm, and in sub-quadrats, natural regeneration (RN) composed of alive individuals with long stem >?10?cm e DSH

‣ Impacto do uso de herbicidas na regenera??o e no banco de sementes em ?reas em processo de recupera??o.

Machado, Vin?cius de Morais
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The objective of this study was to evaluate the impact of herbicide use in regeneration and in the seed bank in areas where the recovery process.?Thus, we developed three of four experiments in a field environment and in a protected environment.?In the first experiment, we evaluated the infestation of exotic grasses on the natural regeneration process.?In the second, we evaluated the influence of the seed bank in the process of restoration of areas infested with grassy weeds.?In the third study, we evaluated the sensitivity of some tree species native to the action of the herbicide glyphosate and the fourth and final experiment evaluated the effect of the herbicide paraquat and control of invasive grasses in degraded areas, compared to mowing, aiming at adapting the?most efficient methods to control weeds.?We could see that from a weed coverage above 50% for the reverse process of natural regeneration, however, there is a group of plants able to colonize this area.?It was also found that the seed bank is composed primarily of herbaceous species with character attacker, not containing seeds of woody species, so is not recommended for rehabilitation of these areas using the local seed bank.?In the trial in doses of glyphosate...

‣ Emerg?ncia e crescimento de pl?ntulas de matrizes de Caryocar brasiliense camb. em diferentes condi??es ambientais

Lima, Vin?cius Orlandi Barbosa
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The objective of this study was to evaluate the influence of environments, substrates, progenies and provenances in the emergence and seedling growth of pequi. The experiment was conducted in a greenhouse environment, the shade and open air, where they were evaluated in different matrices of the substrates S1 (subsoil texture average), S2 (70% vermiculite and 30% charcoal powder) and S3 (30% of charcoal powder, vermiculite 50% and 20% sand). The germination data were analyzed by chi-square test for independence, while the variables of diameter and height of seedlings by analysis of variance. The results were significant (p <1%) for progeny, substrates and environments in relation to the rate of emergence. The substrate S1 open and the environment had the highest percentage of seedling emergence (7.54% and 7.59%), since the substrate S1 within the shade was the interaction that yielded better results (12.61%) . The emergence of positively correlated to the density and temperature of the substrate and negatively with their ability to retain water, and is inversely proportional to the pressure of water vapor from the environment. The substrate S3 and greenhouse alone contributed to the higher average stem diameter and height of seedlings...

‣ Influ?ncia do desbaste e da fertiliza??o na produ??o de um povoamento de eucalipto.; Influence of thinning and fertilization in production of a settlement of eucalyptus.

Silva, Jadir Vieira da
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT This study aimed to evaluate the estimates of biomass production and nutrient in response to different intensities of thinning and fertilization after thinning in a stand of eucalypt clones. The experiment was installed in area owned by company ArcelorMittal BioFlorestas, in Martinho Campos, MG. The experiment consisted in a randomized block design, with two blocks, four thinning intensities (0, 20, 35 and 50%), with and without fertilizer after thinning. The technique age of thinning was determined by the percentage of entries method, being performed at 89 months and fertilization after thinning determined by nutrient export to 107 months. Data analysis was performed at 36 months after thinning, and 18 months after fertilization. Thinning provided greater influence on forest production in relation to fertilization. It was found that the percentage of entries method was adequate biologically to estimate technical age of first thinning. Thinning influenced the growth in diameter, basal area, volume and biomass per hectare. The total height and crown height did not differ statistically among the thinning treatments. Fertilization performed at 18 months after thinning did not affect the growth and yield of stand variables analyzed. There was no statistical difference in the efficiency of nutrient use in relation to the intensities of thinning and fertilization after thinning. There was positive relationship between nutrient content and dry mass production. The accumulation of nutrients to the total content in the of above ground and the stem was proportional to the intensity of thinning...

‣ Comportamento de esp?cies nativas e ex?ticas sob aduba??o mineral e org?nica em rejeito de minera??o de quartzito.; Behavior of native and exotic species in mineral and organic fertilizer in reject mining quartzite,

Amaral, Cristiany Silva
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The decline in diamond mining in the region of Diamantina-Minas Gerais and its surroundings, with the interruption of the searches and the gradual exhaustion of the mines in operation, is providing the discovery and exploitation of massive quartzite, which causes the degradation of existing vegetation and soil,?creating an environment very inhospitable to plant growth.?This study aimed to characterize the waste from mining areas of quartzite in Diamantina-Minas Gerais and its surroundings, through the evaluation of particle size and chemical wastes, as well as to evaluate the behavior of Brachiaria brizantha, Vetiveria zizanioides, Eremanthus erythropappus, Solanum lycocarpum Dalbergia miscolobium beneath the influence of mineral and organic fertilizer when grown on tailings from mining of quartzite, to support the recovery of these areas of exploration. Therefore, it were assembled six experiments: in the first, 27 composite samples were collected, carefully homogenized, air dried and passed through sieve mesh of 2.0mm for subsequent chemical characterization and particle size was determined for each variable the minimum, maximum, mean and median, confidence interval at 5% for mean and coefficient of variation and a study of the occurrence frequency of results by range of classification for interpretation of soil fertility. Other?experiments were conducted in?greenhouse?conditions...

‣ Efeito pr?-operat?rio da dexametasona e da metilprednisolona no controle da dor, edema e trismo ap?s cirurgia de terceiro molar: um ensaio cl?nico randomizado, triplo-cego, boca dividida.; Preemptive effect of dexamethasone and methilprednisolone on pain, swelling and trismus?after third molar surgery: a split-mouth randomized triple-blind clinical trial

Alc?ntara, Carlos Eduardo Pinto de
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The?aim of this study?was to make a comparative assessment of the effect of?dexamethasone and methylprednisolone?to control pain, swelling?and limitation?of mouth opening after extraction of?impacted third molars.?Sixteen healthy patients (3 men and 13 women)?with a mean age?of 20.3 (SD = 1,25) years underwent bilateral extraction?of?third molars with na interval of three to four weeks between the two surgeries. One hour?before each?surgical procedure?a single oral dose?of?dexamethasone 8?mg or methylprednisolone?40?mg was administered.?During the postoperative?intervals?of 24,?48?and 72?hours and?seven days, the swelling was determined using?linear?measures?in the?face and trismus?by?maximum mouth opening. The?postoperative pain?was self-recorded?by the patient using?visual analogue scale?in?72 hours with an interval of eight hours. Statistical analysis involved descriptive analysis, McNemar test, Wilcoxon?and paired T test (p?<0.05). Dexamethasone showed better control of swelling in all?postoperative periods (p?<0.02) and of mouth opening two days after surgery (p = 0.029). Regarding pain there was no statistically significant difference between the drugs. Preemptive dexamethasone?8 mg showed better control of swelling?and limitation?of mouth opening than methylprednisolone 40 mg...

‣ Sa?de bucal de portadores de HIV-AIDS: influ?ncia de fatores sist?micos e locais no determinante sa?de-doen?a; Oral health of patients with HIV-AIDS: influence of local and systemic factors

Batista, Anne Margareth
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The research entitled "Oral Health of HIV-AIDS patients: influence of local and systemic factors" was held during the year 2012 in Diamantina, Minas Gerais. The aim of this research was to evaluate the oral and systemic conditions of patients with HIV / AIDS attended by Municipal DST-AIDS of Diamantina, from 24 cities of Jequitinhonha Valley. To do this, 118 patients with HIV-AIDS were evaluated. The patients were observed about their conditions of oral and general health, socioeconomic aspects, epidemiological aspects of HIV infection (form of contamination and diagnosis), use of highly active antiretroviral therapy (HAART), CD4 count, customs(smoking, alcohol and other drugs), as well as access of these patients to dental services. The results revealed that most of the patients were males (53.4%), mean age was 39.7 years, the form of contamination of 98.3% of patients was through sex and the family income of 44.9% of patients is a monthly wage like $362,00. There was a high rate of disease and oral lesions, the most prevalent periodontal diseases (70.3%), mucosal hyperpigmentation (52.5%), angular cheilitis (32.2%) and recurrent aphthous ulcerations ( 29.7%). Hyperpigmentation of mucosa seems to be more frequent among patients on HAART and in smokers. Oral candidiasis was associated with diabetes...

‣ Altera??es bucais em crian?as escolares: influ?ncia dos sintomas do TDAH e fun??es executivas; Oral diseases in school children: influence of ADHD symptoms and executive functions

Veloso, Isabella Mota Pereira
Fonte: UFVJM Publicador: UFVJM
Tipo: Dissertação de Mestrado
Português
ABSTRACT The attention deficit and hyperactivity disorder (ADHD) is the most common developmental disorder among students and may trigger changes across the life course of the individuals and their families. Objectives: To investigate whether ADHD can be considered a risk factor for oral alterations. Methods: The dissertation was developed in two independent studies. In the first study, a review article was developed in which two researchers conducted the searches independently, in the MEDLINE and Web of Science databases. We analyzed all original articles on the subject, regardless the type of the study, published since the beginning of the database to August 2012. In the second study we developed a cross-sectional study with a representative sample of 851 children aged between 7 and 12 years, randomly selected from schools of Diamantina city. Socioeconomic data were collected through questionnaires sent to parents. All children participated in the clinical examination of dental caries and neuropsychological assessment, using the Raven Coloured Progressive Matrices test, Corsi Blocks and Digit Span. Inattention and hyperactivity symptoms were assessed by the filling of the SNAP scale by parents and teachers. Results: In the first study...