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Fungos micorr?zicos arbusculares em sempre-viva p?-de-ouro (Syngonanthus elegans (Bong.) Ruhland.). / Arbuscular mycorrhizal fungi in star-flower foot-of-gold (Syngonanthus elegans (Bong.) Ruhland.).Costa, Hesmael Antonio Orlandi 30 July 2008 (has links)
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Previous issue date: 2008 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / A sempre-viva Syngonanthus elegans, ? uma esp?cies end?mica dos Campos Rupestres que est? amea?ada de extin??o devido ao extrativismo, que busca sua beleza natural como mat?ria prima para confec??o de produtos ornamentais com alto valor comercial. Existem poucas informa??es sobre a ecologia desta esp?cie e nenhuma sobre a ocorr?ncia de fungos micorr?zicos arbusculares (FMAs). O objetivo deste trabalho foi avaliar a ocorr?ncia e a diversidade de FMAs em Syngonanthus elegans. Dez plantas com ra?zes e solo rizosf?rico foram coletadas, em julho de 2007, de locais de ocorr?ncia natural em Diamantina ? MG: Nascente do C?rrego do Soberbo e Parque Nacional das Sempre-vivas. Em cada local foi selecionada uma ?rea de 100 x 100m. Estas ?reas apresentam semelhan?a quanto ? fertilidade do solo e ao clima. Como controle, foram coletadas tr?s exemplares das esp?cies Loudetiopsis chrysothrix e Xyris sp. Em S. elegans foram observados estruturas f?ngicas como hifas, ves?culas arbusculos e esporos; alta porcentagem de ra?zes colonizadas (75 %) e 24 esp?cies de FMAs morfologicamente distintos. Mais da metade dos FMAs observados neste estudo n?o puderam ser identificadas a n?vel de esp?cie, sendo que algumas destas s?o possivelmente novas para ci?ncia, como Acaulospora sp.3, Scutellospora sp.1, Scutellospora sp.3 e Scutellospora sp. 4. As fam?lias de FMAs que ocorreram em S. elegans foram Gigasporaceae, Acaulosporaceae, Glomeraceae e Archaeosporaceae, sendo que as fam?lias Acaulosporaceae (47 %) e Gigasporaceae (35 %) foram predominantes nas duas ?reas. Foram observados cinco g?neros de FMAs em S. elegans ocorrendo nas ?reas estudadas, Scutellospora, Gigaspora, Acaulospora, Glomus e Archaeospora, sendo que o g?nero predominante no Soberbo foi Acaulospora (47 %) e Glomus (26 %) e no Parque Acaulospora (35 %), Glomus (29 %) e Scutellospora (24 %). No Parque, apesar de menor ?ndice de diversidade e equitabilidade, observou-se maior riqueza de esp?cies de FMAs. Essa maior riqueza de FMAs, aliada a melhor distribui??o de esp?cies por g?nero, indica que esta ?rea apresenta uma comunidade de FMAs mais est?vel. S. elegans ? uma planta micorr?zica e apresenta alta porcentagem de ra?zes colonizadas e diversidade de FMAs. Algumas esp?cies observadas podem ser novas para a ci?ncia. Novos estudos dever?o avaliar a import?ncia dos FMAs no estabelecimento e sobreviv?ncia de S. elegans. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2008. / ABSTRACT The star-flower Syngonanthus elegans is a species endemic of Campos Rupestres that is threatened with extinction due to the extractivism, which seeks its natural beauty as the raw material for manufacturing of ornamental products with high commercial value. There is little information on the ecology of this species and none on the occurrence of arbuscular mycorrhizal fungi (AMF). The objective of this study was to evaluate the occurrence and diversity of AMF in S. elegans. Ten plants with roots and rhizospheric soil were collected in July 2007 of places of natural occurrence in Diamantina - MG: the east C?rrego Soberbo and the Parque Nacional das Sempre-viva. At each location was selected an area of 100 x 100m. These areas have similar about the fertility of the soil and climate. As a control, were also collected three copies of the species Loudetiopsis chrysothrix and Xyris sp. In S. elegans fungal structures were seen as hyphae, vesicles, arbusculos and spores; high percentage of roots colonized (75%) and 24 species of AMF morphologically distinct. Over half of the AMF observed in this study could not be identified in terms of species, and that some of these are probably new to science, as Acaulospora sp.3, Scutellospora sp.1, Scutellospora sp.3 and Scutellospora sp. 4. The families of AMF that occurred in S. elegans were Gigasporaceae, Acaulosporaceae, Glomeraceae and Archaeosporaceae, and the families Acaulosporaceae (47%) and Gigasporaceae (35%) were predominant in the two areas. Five genera were observed of AMF in S. elegans occurring in the areas studied, Scutellospora, Gigaspora, Acaulospora, Glomus and Archaeospora, the predominant gender in Soberbo was Acaulospora (47%) and Glomus (26%) and the Park Acaulospora (35%), Glomus (29%) and Scutellospora (24%). In the Park, despite a lower index of diversity and evenness, there was greater wealth of species of AMF. This greater wealth of AMF, combined with better distribution of species by genera, indicates that this area has a community of AMF more stable. S. elegans is a mycorrhizal plant and it presents high percentage of colonized roots and diversity of AMF. Some observed species can be new for the science. New studies should evaluate the importance of AMF in the establishment and survival of S. elegans.
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Programa de ilumina??o para su?nos em fase de termina??o / Light Programs for finishing pigsAmaral, Pedro Ivo Sodr? January 2012 (has links)
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Previous issue date: 2012 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O experimento foi conduzido no munic?pio de Couto de Magalh?es de Minas/MG. Foram utilizados 36 su?nos (59,04?5,55 kg) distribu?dos em delineamento inteiramente ao acaso em tr?s tratamentos com seis repeti??es, sendo a unidade experimental composta por dois su?nos na baia. Os animais foram submetidos a tr?s programas hemerais de luz, caracterizando os tratamentos: luz natural (LN), 16 horas de luz e oito horas de escuro (16L:8E) e 23 horas de luz e uma de escuro (23L:1E). A ra??o e a ?gua foram fornecidas ? vontade, os comedouros foram repostos em tr?s tratos ?s 08h, 14h e 19h. Foi anotado o consumo de ra??o di?rio (CRD), o ganho de peso di?rio (GPD), e a convers?o alimentar (CA). Os par?metros fisiol?gicos observados foram a temperatura retal (TR), a freq??ncia respirat?ria (FR) e a temperatura superficial (TS), avaliados em dois per?odos, uma vez por semana. Os leit?es foram observados durante o per?odo nictemeral a cada dez minutos, totalizando quatro dias de avalia??o. Os padr?es observados foram: em p?, deitado, comendo, bebendo, fu?ando em p?, fu?ando outro, sentado, urinando e defecando. Para os dados de desempenho foi feita an?lise em delineamento inteiramente ao acaso, sendo a baia a parcela e o peso inicial como co-vari?vel, as m?dias foram comparadas por teste t a 5% de signific?ncia. Para as caracter?sticas fisiol?gicas (TR, FR e TS), as an?lises foram feitas em delineamento inteiramente ao acaso com esquema fatorial (3x2), considerando os dias de coleta como repeti??es, os programas de luz e os per?odos de coleta como tratamentos. As observa??es de comportamento foram submetidas ao teste de Kruskal-Wallis. As an?lises foram feitas dentro de cada hora do dia, al?m disso, avaliou-se o per?odo diurno (06h ?s 18h) e noturno (18h ?s 06h). Os programas de ilumina??o utilizados n?o influenciaram o consumo de ra??o di?rio, o ganho de peso di?rio nem a convers?o alimentar dos animais. Os resultados para TS foram maiores para os su?nos que receberam 23L:1E, no per?odo da tarde em rela??o aos demais. A luz suplementar promoveu eleva??o da FR, apenas no per?odo da tarde. A TR n?o variou entre os tratamentos. As vari?veis comportamentais ?em p??, ?defecando?, ?fu?ar em p??, ?fu?ar o outro? e ?urinando? n?o diferiram em nenhum dos per?odos estudados. Houve diferen?a significativa entre os tratamentos para a vari?vel ?deitado?, "comendo", "bebendo" e "sentado" indicando poss?vel aumento na atividade dos animais no per?odo da noite. O uso de programas de ilumina??o para su?nos em termina??o n?o alterou o desempenho dos animais. Todavia, o fornecimento de luz adicional influenciou o comportamento dos animais que ficaram mais ativos. A maior atividade dos su?nos que receberam luz apresentou, como consequ?ncia, altera??es nos par?metros fisiol?gicos indicando maior desconforto ambiental no per?odo da tarde. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, [2012]. / ABSTRACT
The experiment was conducted in Couto de Magalh?es de Minas/ MG. Was used 36 pigs (59.04 ? 5.55 kg) allotted to completely randomized design with three treatments and six replicates of one experimental unit consisted of two pigs at bay. The animals underwent three light programs, featuring treatments: natural light (NL), 16 hours of light and eight hours of dark (16L: 8D) and 23 hours of light and one dark (23L: 1D). Feed and water were given ad libitum, the feeders were restored in three tracts at 08h, 14h and 19h. It was noted the daily feed intake (DFI), daily weight gain (ADG) and feed conversion (FC). The physiological parameters were observed rectal temperature (RT), respiratory rate (RR) and surface temperature (TS), evaluated in two periods, once a week. The animals were observed during the diel every ten minutes, totaling four days of evaluation. The patterns observed were: standing, lying, eating, drinking, standing digging, digging another, sitting, urinating and defecating. For performance data analysis was performed in a completely randomized design, with the pen portion and initial weight as a covariate, the means were compared by t test at 5% significance for the physiological characteristics (TR, FR and TS) analyzes were done in a completely randomized design with factorial arrangement (3x2), considering the collection days as replicates, the lighting programs and collection period as treatments. The behavioral observations were submitted to Kruskal-Wallis test. The analyzes were performed within each time of day, in addition, we assessed the daytime (06h to 18h) and night (18h to 06h). The lighting programs used did not affect feed intake, daily weight gain or feed the animals. The results for TS were higher for pigs receiving 23L: 1D, in the afternoon compared to the other. The supplemental light promoted an increase in RF only in the afternoon. The TR did not vary between treatments. The behavioral variables "standing", "defecating", "tweak in the foot", "tweak the other" and "pissing" did not differ in any of the periods studied. There were significant differences between treatments for the variable "lying", "eating", "drinking" and "sitting" indicating a possible increase in the activity of the animals at night. The use of lighting programs for finishing pigs did not affect animal performance. However the provision of additional light influenced the behavior of animals that were more active. A greater activity of the pigs that had received the light, as a consequence, changes in physiological parameters indicating greater environmental discomfort in the afternoon.
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Comportamento de diferentes linhagens de frango de corte tipo caipira / Behavior of different strains of free-range broiler chickensGon?alves, Sic?lia Avelar January 2012 (has links)
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Previous issue date: 2012 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O experimento foi conduzido, no setor de avicultura da Universidade Federal dos Vales do Jequitinhonha e Mucuri, localizado no munic?pio de Diamantina/MG, o qual se situa a 1.370 m de altitude, 18?9? S de latitude e 43?21?W de longitude, durante o per?odo de 21 de fevereiro a 16 de maio de 2011, com o objetivo de avaliar a capacidade de adapta??o ao sistema de cria??o semi-intensivo de sete linhagens comerciais de frango de corte tipo caipira atrav?s de par?metros comportamentais e fisiol?gicos. Foram utilizados 420 pintos de um dia de sete gen?tipos diferentes. Aos 28 dias de idade foi permitido o acesso aos piquetes. Ap?s um per?odo de tr?s dias de adapta??o foi iniciado o monitoramento dos animais, dos 31 aos 84 dias de idade, durante os quais foram realizadas as observa??es visuais comportamentais das 07:00 at? 17:00 horas. Temperatura cloacal e frequ?ncia respirat?ria foram coletados uma vez por semana ?s 09:00 e 15:00 horas. Os dados de temperatura de bulbo seco, umidade relativa do ar e temperatura de globo negro foram obtidos por meio de term?metros instalados em v?rios pontos dos piquetes e do galp?o, coletadas quatro vezes ao dia As vari?veis fisiol?gicas foram avaliadas utilizando-se o delineamento em blocos casualizados, com arranjo em parcelas subdivididas. As vari?veis comportamentais foram analisadas atrav?s do teste n?o param?trico de Friedman. Durante o per?odo experimental a temperatura m?dia do ar manteve-se, dentro do galp?o, em 21,5?C e a umidade relativa em 74,6%. Nos piquetes a temperatura m?dia manteve-se em 23,2?C e a umidade em 64,7%. Houve aumento no ITGU entre 8:00 h e pr?ximo ?s 14:00 h, decrescendo ap?s este hor?rio. As aves das linhagens, Carij? e Colorpak apresentaram FR mais elevada em rela??o ?s aves das linhagens Caboclo e Gigante Negro. Os valores m?dios de FR e TC para todas as linhagens foram maiores no per?odo da tarde. Para os comportamentos comendo, bebendo, explorando penas, bicagem n?o agressiva, bicagem agressiva, movimento de desconforto, ciscando e banho de areia n?o houve efeito da linhagem no hor?rio de sete horas da manh?. As linhagens Caboclo e Gigante Negro foram as que obtiveram o menor n?mero m?dio de animais sentados e o maior n?mero m?dio de aves forrageando ?s sete horas da manh?. A partir de nove horas houve redu??o no comportamento de forragear e acr?scimo no comportamento sentado. Para o comportamento de comer houve aumento na observa??o das nove horas em rela??o ?s sete horas e consequentemente aumento no consumo de ?gua para todas as linhagens. Aumento no movimento de desconforto pode ser notado entre onze horas e quinze horas. A partir das quinze horas o comportamento de forragear come?ou a ficar mais intenso. As linhagens Caboclo e Gigante Negro se mostraram mais capazes de adaptar ao sistema de cria??o semi-intensivo, fisiologicamente tamb?m foram mais eficientes controlando melhor sua temperatura corporal e frequ?ncia respirat?ria. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, [2012]. / ABSTRACT
The experiment was conducted in the poultry sector of the Universidade Federal dos Vales do Jequitinhonha e Mucuri, in Diamantina/MG, which is situated at 1370m altitude, 18?9'S latitude and 43?21'W longitude, from February 21st to May 16th, 2011, the objective was to evaluate the ability to adapt to the semi-intensive farming system of seven commercial strains of free-range broiler chickens through the evaluation of behavioral, physiological and performance parameters of birds. There had been used 420 chicks with one day old of seven genotypes. At 28 days old, they have been allowed access to the paddocks. After a period of three days of adaptation, monitoring of animals was initiated, from the 31st to the 84th days old, during which the behavioral visual observations were performed from 07:00 until 17:00 hours. The cloacae temperature and frequency respiratory were collected once a week at 09:00 and 15:00 hours. The data of dry bulb temperature, relative humidity and black globe temperature were obtained by means of thermometers installed at various points of the paddocks and the poultry house, collected four times a day. The physiological variables were evaluated using a randomized block design with split plots. The behavioral variables were analyzed using the nonparametric Friedman test. During the experimental period the mean air temperature inside the poultry house was kept at 21.5?C and relative humidity at 74.6%. In the paddocks, the average temperature was maintained at 23.2?C and humidity at 64.7%. There was an increase in BGT between 8:00 and almost up to 14:00 hours, decreasing after this time. The birds of the strains Carij? and Colorpak showed frequency respiratory higher compared to the birds of the strains Caboclo and Gigante Negro. The mean frequency respiratory and cloacal temperatures for all strains were higher in the afternoon. For the behaviors eating, drinking, exploring feathers, non-aggressive pecking, aggressive pecking, movement discomfort, scratching and dust-bathing there was no effect (P <0.05) of the strain at 07:00 hours in the morning. The strains Caboclo and the Gigante Negro which were obtained the lowest average number of animals sitting and higher average number of birds foraging at 07:00 hours in the morning. As from 09:00 hours there was a reduction in foraging behavior and increased sitting behavior. For eating behavior increased in 09:00 hours of observation in relation to 07:00 hours and consequently increase in water consumption for all strains. Increased movement of discomfort can be noticed between 11:00 and 15:00 hours. From the 15:00 hours of foraging behavior became more intense. The strains Caboclo and Gigante Negro had better adaptability to the semi-intensive farming system compared to other strains. Physiologically, the birds of the strains Caboclo and Gigante Negro were more able to maintain their body temperature and frequency respiratory at lower levels
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Plantas indicadoras de res?duos atmosf?ricos do clomazoneSilva, M?rcio Marques da 28 April 2016 (has links)
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Previous issue date: 2016 / Coordena??o de Aperfei?oamento do Pessoal de N?vel Superior (CAPES) / O clomazone ? um herbicida inibidor da s?ntese de carotenoides. Esse herbicida ? facilmente solubilizado e volatilizado e por consequ?ncia, pode causar danos ao ambiente. Em vista do problema, objetivou-se com esta pesquisa: avaliar a sensibilidade de esp?cies forrageiras e daninhas a res?duos atmosf?ricos do clomazone e determinar a campo o efeito do res?duo atmosf?rico do clomazone sobre a fisiologia de plantas forrageiras e daninhas. Foram realizados dois experimentos. O primeiro foi conduzido em c?maras experimentais de 500 dm? em ambiente monitorado, delineado inteiramente casualizado com 5 repeti??es. Os tratamentos foram arranjados em esquema fatorial 6x5, sendo, seis esp?cies vegetais: triticale, milho, sorgo, braquiar?o, beldroega e campim braquiaria e o segundo cinco doses de clomazone 0, 90, 180, 270 e 360 g ha-1 (equivalentes ?s concentra??es atmosf?ricas de 0,0; 0,05; 0,10; 0,15 e 0,20 mg L-1, considerado o volume). As esp?cies ficaram expostas ao herbicida no interior das c?maras por per?odo de 96 horas em atmosfera controlada. Ap?s esse intervalo, as c?maras foram abertas, procedendo-se ? primeira avalia??o, repetida aos 7 e 14 dias ap?s a abertura. Avaliou-se a intoxica??o e o teor de clorofila. Com exce??o do milho, todas as esp?cies testadas mostraram-se sens?veis ?s concentra??es residuais de clomazone na atmosfera, podendo ser utilizadas no monitoramento da qualidade do ar. O segundo experimento foi conduzido a campo. Delineado em blocos causalizados com quatro repeti??es, em esquema fatorial 6x4, sendo seis esp?cies vegetais [quatro plantas forrageiras: lab lab, sorgo, braqui?r?o e java, e duas plantas daninhas: beldroega e sida] e quatro solu??es de aplica??o do clomazone (0, 360, 720 e 1.080 g ha-1, equivalentes a 0; 0,05; 0,10 e 0,20 mg L-1, considerado o volume). As plantas forrageiras e daninhas ficaram expostas ao clomazone, em tuneis cobertos por filme de polietileno de baixa densidade (150 ?m) de volume de 12m?, por per?odo de 72 horas. Ap?s esse tempo, os t?neis foram abertos, procedendo-se ?s seguintes avalia??es: intoxica??o das plantas, fluoresc?ncia inicial, fluoresc?ncia m?xima, a raz?o entre a fluoresc?ncia vari?vel e fluoresc?ncia m?xima, quenching fotoqu?mico e quenching n?o-fotoqu?mico, taxa de transporte de el?trons e do teor de clorofila. Mesmo em concentra??es que n?o promovem efeito visual, o clomazone ? capaz de causar danos significativos na atividade fotossint?tica das esp?cies. As vari?veis fisiol?gicas, clorofila total, rendimento qu?ntico m?ximo do PSII e fluoresc?ncia inicial da clorofila podem ser utilizadas de forma eficiente no monitoramento de res?duos do clomazone na atmosfera. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The herbicide Clomazone is an inhibitor of carotenoids synthesis. This herbicide is easily solubilized and volatilized, and by consequence, can cause damage to environment. Due to this problem, the objective of this study was evalue the sensibility of forage and weeds species to atmospheric wastes of Clomazone and to determinate in field the effect of atmosferic waste of Clomazone in phisiology of forage and weeds plants. Two experiments were performed. The first was conducted in 500dm? experimental chambers in a monitored environment, completely randomized design design with five repetitions. The treatments was arranged in 6x5factorial scheme, being six vegetable species: triticale, corn, sorghum, braquiar?o, beldroega e capim braquiara and the second five doses of Clomazone 0, 90, 180, 270 e 360 g ha-1 (equivalent to atmospheric concentrations of 0,0; 0,05; 0,10; 0,15 e 0,20 mg L-1, volume considered). The species were exposed to the herbicide inside the chambers for 96 hours in controled atmosphere. After this interval, the chambers were open, proceeding the first evaluation, repeated at 7 and 14 days after the opening. Was rated the intoxication and the chlorophyll contente. Excepting the corn, all tested species proved to be sensitive to Clomazone residual concentration in atmosphere, and can be used in ais quality monitoring. The second experiment was conducted in field. An experiment was conducted in a randomized block design with four repetitions, in 6x4 factorial scheme, being six vegetable species [ four forage plants :lab lab, sorghum, braquiar?o and java, and two weed plants: beldroega and sida] and four Clomazone application solutions (0, 360, 720 e 1.080 g ha-1, equivalentes a 0; 0,05; 0,10 e 0,20 mg L-1, volume considered). The forage and weeds plants were exposed to Clomazone, in tunnels covered by polyethylene film of low density (150 ?m), volume of 12m?, for 72 hours. After this time, the tunnels were open, proceeding this following evaluations: plants intoxication, initial fluorescence, maximum fluorescence, ratio of the variable fluorescence and maximum fluorescence, photochemical quenching and non-photochemical quenching, el?ctron transport rate and chlorophyll contente. Even in concentrations that don?t promote visual effect, the Clomazone is able to cause significative damage in photosynthetic activity of species. The phisiologic variables, total chlorophyll, PSII maximum quantum yield and chlorophill initial fluorescence can be used efficiently in monitoring of Clomazone wastes in atmosphere.
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Comportamento ingestivo de bovinos leiteiros alimentados com farelo de crambe / Ingestive behavior of dairy catle fed crambe branOliveira, K?nia Maria de 06 June 2014 (has links)
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Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / O objetivo desse trabalho foi estudar os efeitos da utiliza??o de farelo de crambe em substitui??o ao farelo de soja sobre o comportamento ingestivo de bovinos leiteiros. Foram utilizados quatro machos castrados Holand?s x Zebu, fistulados no r?men, com peso vivo m?dio de 664 kg, distribu?dos em delineamento quadrado latino 4 x 4. Os tratamentos consistiram em quatro dietas isoproteicas e isoenerg?ticas, formuladas com rela??o volumoso:concentrado 60:40 com base na mat?ria seca (MS). O volumoso foi composto de silagem de milho (51% MS) e? feno de Tifton (49% MS), e o concentrado formulado com n?veis crescentes de substitui??o do farelo de soja pelo farelo de crambe em 0%, 2,8%, 6,4% e 11,0% na MS da dieta. O comportamento ingestivo foi avaliado atrav?s do m?todo direto de avalia??o visual, em intervalos de 10 minutos, durante per?odos de 24 horas. Registrou-se a frequ?ncia de alimenta??o, rumina??o e ?cio e a posi??o do animal (em p? ou em dec?bito). As vari?veis em p? e em dec?bito n?o diferiram entre os tratamentos, assim como os tempos gastos em alimenta??o, rumina??o e ?cio. O consumo de mat?ria seca e de FDN expressos em g/dia e gFDN/dia respectivamente, a efici?ncia de rumina??o expressa em gMS/min, a efici?ncia de rumina??o expressa em gFDN/dia e o tempo de mastiga??o total n?o diferiram significativamente. No entanto, a efici?ncia de alimenta??o (gMS/min) variou de forma linear decrescente com a inclus?o do farelo de crambe. Os per?odos do dia influenciaram todas as atividades. O maior tempo de alimenta??o foi observado nos per?odos ap?s o fornecimento da dieta e a maior atividade de rumina??o foi verificada no per?odo noturno. A substitui??o de farelo de soja por farelo de crambe n?o afetou o comportamento ingestivo, exceto para o par?metro efici?ncia de alimenta??o. Neste sentido, considerando o comportamento ingestivo, recomenda-se a substitui??o do farelo de soja por farelo de crambe para alimenta??o de bovinos leiteiros. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT
The aim of this work was to study the effects of the use of crambe meal replacing soy bean meal on the ingestive behavior of dairy cattle. Four male Holstein x Zebu rumen, with average live weight of 664kg distributed in latin square design 4 x 4. The treatments consisted of four diets isonitrogenous and isocaloric, formulated roughage used concentrate 60:40 with based on dry matter (DM). The forage was corn silage (51% DM) and Tifton grass hay (49% DM), and the concentrate was formulated with increasing levels of substitution of soy bean meal by crambe meal at 0%, 2.8%, 6.4% and 11.0% of the diet DM. The feeding behavior was evaluated using the direct method of visual assessment in intervals10 minute during a 24 hour period. Recorded the frequency of feeding, idling time and the animal's position (standing or supine). The variables standing and supine id not differ between treatments as well as spending one a ting, ruminating and idling times. The consumption of dry matter and NDF expressed in g/day and gNDF/day respectively, the efficiency of rumination expressed in gDM/min, the efficiency of rumination expressed in gNDF/day and the total chewing time did not differ significantly. However, the efficiency of power (gDM/min) ranged from decreasing linearly with the inclusion of crambe meal. Periods of the day influenced all the activities. The longer feeding time was observed in the periods after the diet intake and greater rumination activity was observed at night. The replacement of soy bean meal by meal crambe, did not affect feeding behavior, except for the feeding efficiency parameter. In this sense, considering the feeding behavior, it is recommended there placement of soy bean meal by crambe meal to feed dairy cattle.
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Uso de diferentes estrat?gias de ensino no aprendizado de estudantes da ?rea da sa?deFerreira, Ra?na Pleis Neves 27 October 2016 (has links)
?rea de concentra??o: Pol?ticas de integra??o, sa?de e educa??o. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-03-16T20:50:31Z
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Previous issue date: 2016 / Os cursos de gradua??o da ?rea da sa?de vivem uma nova realidade com a inclus?o de novas
estrat?gias no seu processo de ensino/aprendizagem. Hoje, o conhecimento exigido para a
pr?tica segura de cuidados aos doentes demanda uma estrat?gia de ensino que vai al?m do
ensino did?tico tradicional. O processo tecnol?gico tem possibilitado novas formas de
trabalhar o conhecimento no ensino superior, a simula??o ? um exemplo. Esse trabalho
objetivou avaliar o conhecimento, satisfa??o e autoconfian?a adquiridos com o uso de
diferentes estrat?gias de ensino, em estudantes de Medicina e Enfermagem de uma
Universidade P?blica. Trata-se de um estudo quase-experimental, explorat?rio e anal?tico,
sobre a utiliza??o da metodologia tradicional com aula expositiva e da interven??o simulada,
avaliando a autoconfian?a do estudante no atendimento ao paciente cr?tico. Na coleta de
dados utilizou-se de formul?rio para obter a caracteriza??o do sujeito, provas te?ricas antes e
depois, Escala de Satisfa??o dos Estudantes e Autoconfian?a na Aprendizagem para avalia??o
da simula??o. Os dados coletados foram tabulados e analisados com software Statistical
Package for Social Sciences(SPSS), vers?o 23.0. Para verificar se houve diferen?a entre as
pontua??es obtidas nas provas, os resultados foram submetidos ao teste de Friedman, com p?s-teste de Wilcoxon. A associa??o de dados categ?ricos foi verificada pelo teste Qui-quadrado.
Foi adotado o n?vel de signific?ncia de 95% (p<0,05). Comparando as duas metodologias de
ensino utilizadas nesse estudo, os testes demonstraram que os estudantes obtiveram maior
?ndice de acerto nas quest?es da prova, ap?s a simula??o real?stica (p<0,001). Em rela??o ?
escala de satisfa??o e autoconfian?a, os dados demonstraram satisfa??o e autoconfian?a dos
estudantes ap?s a simula??o real?stica (p<0.001). A integra??o da metodologia tradicional
com a da simula??o, teoria e pr?tica, mostrou-se eficaz para a obten??o e consequentemente
melhora do conhecimento. Conclui-se que a simula??o ? uma metodologia inovadora e ativa
que permite melhorar o conhecimento do estudante, proporcionando maior satisfa??o e
autoconfian?a na aprendizagem. Pode-se dizer que a simula??o melhorou o aprendizado ao
proporcionar atrav?s da viv?ncia, experi?ncias que simulam a pr?tica cl?nica. / Disserta??o (Mestrado) ? Programa de P?s-gradua??o em Ensino em Sa?de, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The health of undergraduate living a new reality with the inclusion of new strategies in their teaching/learning process. Today, the knowledge required for the safe practice of patient care
requires a teaching strategy that goes beyond the traditional didactic teaching. The
technological process has enabled new ways of working knowledge in higher education; an
example of this is the simulation. This study aimed to evaluate the knowledge, satisfaction e
self-confidence acquired through the use of different teaching strategies in Medicine and
Nursing students of a Public University. It is a quasi-experimental, exploratory and analytical
study about the use of the traditional methodology with expository class and simulated
intervention, evaluating the student's self-confidence in critical patient care. In the data
collection, a form was used to obtain the characterization of the subject, theoretical tests
before and after, Student Satisfaction Scale and Self-confidence in Learning to evaluate the
simulation. Data were tabulated and analyzed with software Statistical Package for Social
Sciences (SPSS) version 23.0. To check whether there was difference between the scores
obtained in the tests, the results were submitted to the Friedman test, with post Wilcoxon test.
The categorical data binding was checked by chi-square test. The significance level of 95% (p
<0.05) was adopted. Comparing the two teaching methods used in this study, the tests have
shown that students had higher success rates after the realistic simulation (p<0.001).
Regarding the scale of student satisfaction and self-confidence, the data showed satisfaction
and self-confidence of students after realistic simulation (p<0.001). The integration of
traditional methods with the simulation, theory and practice, proved to be effective to achieve
and consequently improves knowledge. We conclude that the simulation is an innovative and
active methodology to improve student knowledge, providing satisfaction and confidence in
learning. It can be said that the simulation by providing improved learning by experience,
experiments that simulate the clinical practice.
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Indicadores da Vigil?ncia Sanit?ria nos munic?pios da jurisdi??o da Superintend?ncia Regional de Sa?de de Montes Claros/MG, 2012-2014Rezende, D?borah Braga Oliva Audebert 15 July 2016 (has links)
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Previous issue date: 2016 / A Vigil?ncia em Sa?de ? considerada uma ?rea estrat?gica para a redefini??o das pr?ticas sanit?rias brasileiras, todavia a operacionaliza??o descentralizada das a??es de sa?de ainda ? deficiente. Neste contexto, o governo do Estado de Minas Gerais lan?ou, em 2012, o Projeto de Fortalecimento em Vigil?ncia em Sa?de. No presente trabalho objetivou-se analisar a situa??o da Vigil?ncia Sanit?ria dos 53 munic?pios, subdivididos em cinco regi?es de sa?de, sob jurisdi??o da Superintend?ncia Regional de Sa?de de Montes Claros, por meio do estudo das Planilhas de Monitoramento e Avalia??o das a??es de Vigil?ncia em Sa?de destes munic?pios, em oito per?odos, compreendidos entre os anos de 2012 a 2014. Buscou-se comparar, ao longo dos tr?s anos de implanta??o do Programa, as mudan?as verificadas nos percentuais de cumprimento de a??es de cada ?rea da Vigil?ncia em Sa?de, bem como discutir as facilidades e dificuldades encontradas para a execu??o das a??es na ?rea de Vigil?ncia Sanit?ria. Observou-se que o percentual de a??es executadas aumentou a partir do 4? per?odo de avalia??o (julho a setembro/2013), para todas as regi?es analisadas. Entretanto, pode-se detectar que, na maior parte das regi?es, os menores percentuais m?dios foram ?queles relativos ? ?rea da vigil?ncia sanit?ria. Emboratenha havido uma melhora dos indicadores, eles ainda est?o inferiores ?s m?dias do Estado de Minas Gerais, o que provavelmente pode-se relacionar com as heterogeneidades geogr?ficas e socioecon?micas das regi?es que constituem a Superintend?ncia Regional de Sa?de de Montes Claros. Nota-se ainda dificuldades na organiza??o dos servi?os de VISA municipais no ?mbito da SRS/Montes Claros. Conforme as an?lises, percebeu-se uma oscila??o do percentual de execu??o das a??es em alguns munic?pios, sendo que alguns fatoresdificultadores, tais como a alta rotatividade de profissionais, a insufici?ncia de recursos materiais, a falta de pessoal qualificado para o servi?o dificultadores, podem ter contribu?do para a n?o execu??o de v?rias a??es no ?mbito da vigil?ncia sanit?ria nestas localidades. Diante das informa??es neste estudo, verifica-se que existem tamb?m facilidades na execu??o das a??es de VISA, como a exist?ncia pr?via do servi?o de VISA, a ea ea extens?o territorial do munic?pio, a infraestrutura m?nima de funcionamento e o apoio de gestores e da popula??o. No entanto,as facilidades ainda s?o pouco frequentes.Assim, pode-se concluir que embora tenham ocorrido avan?os, de forma geral, no servi?o de vigil?ncia em sa?de ap?s implanta??o do Projeto de Fortalecimento da Vigil?ncia em Sa?de, ainda se notam fragilidades e fraquezas na organiza??o dos servi?os, especialmente os de Vigil?ncia Sanit?ria, nos munic?pios objeto deste estudo. A insufici?ncia de insumos, ferramentas, instrumentos materiais e equipe multidisciplinar qualificada para o setor demonstram a dist?ncia entre as pol?ticas do Sistema ?nico de Sa?de, as necessidades sociais, a miss?o da vigil?ncia sanit?ria na prote??o da sa?de e a realidade concreta dos munic?pios da jurisdi??o da Superintend?ncia Regional de Sa?de de Montes Claros. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Sa?de, Sociedade e Ambiente, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The Health Surveillance is considered a strategic area for the redefinition of Brazilian health practices, however decentralized operationalization of health actions is still deficient. In this context, the state government of Minas Gerais launched in 2012, the Strengthening Project in Health Surveillance. This work aimed to analyze the situation of the Health Surveillance of 53 municipalities, divided into five health regions under the jurisdiction of Regional Health Superintendency of Montes Claros, through the study of the Monitoring Sheets and Evaluation of Surveillance actions in health these municipalities in eight periods, ranging from the years 2012 to 2014. We attempted to compare, over the three years Program implementation, the changes in the percentage of enforcement actions in each area of health surveillance and discuss the advantages and difficulties encountered in the implementation of actions in the health surveillance area. It was observed that the percentage of executed shares increased from the 4th assessment period (July-September / 2013), for all analyzed regions. However, one can detect that in most regions, the average lowest percentages were those relating to the area of health monitoring. Emboratenha been an improvement in indicators, they are still below the average of the state of Minas Gerais, which probably can be related to the geographical and socioeconomic heterogeneity of the regions that make up the Regional Health Superintendency of Montes Claros. Note also difficulties in the organization of municipal VISA services within the SRS / Montes Claros. According to the analysis, it was noticed a wobble in the percentage of implementation of actions in some municipalities, and some fatoresdificultadores, such as high staff turnover, lack of material resources, lack of qualified personnel for hindering service may have contributed to the non-implementation of various actions under health surveillance in these locations. On the information in this study, it appears that there are also facilities in the implementation of VISA shares, as the prior existence of the VISA service, the territorial extension of the municipality, the minimum infrastructure operation and support managers and the public. However, the facilities are still poorly frequentes.Assim, it can be concluded that although there were advances, generally, the surveillance service health after implementation of health surveillance Strengthening Project, still noticeable weaknesses and weaknesses in organization of services, especially health surveillance in municipalities object of this study. The lack of supplies, tools, materials, instruments and qualified multidisciplinary team for the sector demonstrate the distance between the Health System policies, social needs, the mission of health surveillance in the health protection and the concrete reality of the jurisdiction of the municipalities of Regional Health Superintendency of Montes Claros.
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A filosofia da mente de John R. Searle na perspectiva emergentistaCastro, Frederico Fernandes de 15 March 2017 (has links)
Linha de pesquisa: Linguagem, Filosofia e Cultura. / O orientador do trabalho n?o mencionado na lista da Folha de Aprova??o. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-03-09T19:59:06Z
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Previous issue date: 2017 / Cr?tico dos modelos propostos para a Filosofia da Mente, John R. Searle, baseado na tradi??o da Filosofia Anal?tica Contempor?nea e na Filosofia da Linguagem, inicia sua pesquisa sobre o problema da consci?ncia dialogando com as Neuroci?ncias, com a Intelig?ncia Artificial e com as Ci?ncias Cognitivas. Searle defende que a mente ? uma propriedade emergente do sistema nervoso. Com o naturalismo biol?gico ele prop?e respostas acerca do problema mente-corpo aceitas e criticadas por muitos, al?m de apontar algumas falhas recorrentes em outras propostas. Objetiva-se nesta disserta??o, tendo como ponto de partida o conceito de consci?ncia, apontar contribui??es das reflex?es emergentistas sobre o problema da corporeidade da mente baseadas na teoria proposta por Searle. O presente procede pelo estudo de um renomado livro do autor intitulado A redescoberta da Mente. Para an?lise tamb?m foram utilizados alguns interlocutores que lhe s?o contempor?neos e comentadores, dando espa?o para di?logos que se mostram pertinentes ?s elabora??es conceituais de Searle. Metodologicamente esta pesquisa est? fundamentada na an?lise conceitual a qual foi delineada pela Filosofia Anal?tica dos s?c. XIX e XX. Sobre a organiza??o da disserta??o, o no primeiro momento do texto prop?e expor uma breve s?ntese do autor e suas obras, bem como a an?lise do conceito de emerg?ncia. Neste cap?tulo destacam o di?logo entre Searle e Thompson quanto ao termo emerg?ncia. No segundo momento tratamos do problema da consci?ncia e seu lugar no universo atrav?s da exposi??o de teorias sobre a rela??o mente e corpo. Destacaremos as cr?ticas de Searle ?s abordagens que postulam tentativas de solucionar tal problema partindo de princ?pios reducionistas e dualistas. Analisaremos como que a partir destas cr?ticas ele efetua um modo peculiar de conceitualizar a mente. Searle constr?i um aparato te?rico diferente de muitas tradi??es vistas at? ent?o. Analisa-se no terceiro e ?ltimo momento a irredutibilidade da mente. O naturalismo biol?gico refuta argumentos reducionistas, defendendo que a mente n?o pode ser reduzida ? sua estrutura, ao sistema nervoso. Searle refuta tamb?m qualquer possiblidade de compreens?o da mente a partir de preceitos dualistas ou metaf?sicos que buscam a exist?ncia da mente para l? das rela??es causais dos elementos constituintes do enc?falo. De modo geral, do ponto de vista emergentista defendemos que o naturalismo biol?gico n?o perde sua for?a argumentativa, pelo contr?rio, ele se torna ainda mais consistente e abrangente. Destacamos que Searle definindo a mente como uma propriedade emergente do sistema nervoso foge do escopo epifenomenista, mas entende que, a exemplo da rela??o est?mago/digest?o, o c?rebro em sua organiza??o ? capaz da emerg?ncia da consci?ncia. Isto ?, dado os elementos x em uma organiza??o y, ? poss?vel predicar sobre uma propriedade a qual podemos chamar de consci?ncia que emerge da rela??o entre x e y. Este ? um dos pontos mais caros para nosso trabalho, ou seja, entender o naturalismo biol?gico a partir desta possibilidade emergentista. De modo conclusivo, Searle se apresenta bastante crente na possibilidade de definir a mente como uma propriedade ordin?ria de um sistema biol?gico aprofundando-se em uma vis?o naturalista em Filosofia da Mente e, mesmo que n?o tenha tido a vontade de ser descrito como um emergentista, mostramos que seus postulados est?o alinhados com esta abordagem, herdando tanto de seus avan?os quanto de suas limita??es. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Ci?ncias Humanas, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / Critical of proposed models for the Philosophy of Mind, John R. Searle, based in the tradition of analytic philosophy and the philosophy of language, start his research on the problem of consciousness dialoguing with the Neurosciences, with Artificial Intelligence and Cognitive Sciences. Searle argues that mind is an emerging property of the nervous system. With the biological naturalism, he proposes answers to mind-body problem accepted and criticized by many, as well as pointing out some flaws applicants in other proposals. The objective of this dissertation is, taking as starting point the concept of consciousness, pointing contributions of emergence reflections on the problem of embodiment of mind based on the theory proposed by Searle. This makes the study of renowned book by the author entitled Rediscovery of Mind. For the analysis we have also used some contemporary interlocutors and reviewers, giving some place for pertinent conversations on the main conceptual elaborations of Searle. Methodologically this study is based on the conceptual analysis, which was delineated by the analytic philosophy of the 19th century and 20th century. About the organization of the dissertation, the first moment of the text proposes to present a brief summary of the author and his works, as well as the analysis of the concept of emergency. In this chapter they emphasize the dialogue between Searle and Thompson regarding the emergence term. In the second moment we deal with to expose the problem of consciousness and its place in the universe through exposure to theories about the mind-body relationship. We stress the criticism of Searle to approaches that postulate attempts to solve this problem based on reductionist and dualist principles. We propose to analyze here how, from these criticisms, he performs a peculiar way to conceptualize the mind. Searle builds a theoretical apparatus, different from many traditional ones. It is analyzed in the third moment, the irreducibility of mind. The biological naturalism rejects reductionist arguments, arguing that the mind cannot be reduced to its structure, to the nervous system. Searle refutes any possibility of understanding mind from dualistic precepts or metaphysicians seeking the existence of mind beyond the causal relations of the constituent elements of the brain. In the third session the focus will be one of the problems most applicants of philosophy of mind that is the concept of intentionality. In general, from the emergentist point of view we argue that the biological naturalism does not lose its strength of argument, on the contrary, it becomes even more consistent and comprehensive. We emphasize that Searle definition of mind as an emerging property of the nervous system is out of scope for epiphenomenalism. Following the example of the relation stomach/digestion, the brain in its organization is capable of emergence of consciousness. This is because the elements x in an organization y, it is possible to preach on a property which we call consciousness that emerges from the relationship between x and y. This is one of the most important points for this work, i.e., to understand the biological naturalism from the emergence. In conclusive terms, Searle presents itself quite a believer in the ability to set the mind as an ordinary property of a biological system by drilling down a naturalist vision in philosophy of mind and, even if they did not have the desire to be described as an emergentist, we show that its postulates are aligned with this approach, inheriting both of their advances and their limitations.
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Leitura e m?dia virtual: a constru??o da compet?ncia lexical atrav?s do blogCarvalho, Margarete Gon?alves Macedo de 30 June 2014 (has links)
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Previous issue date: 2014-06-30 / A leitura ? reconhecidamente um processo complexo que envolve aspectos psicol?gicos (cognitivos e metacognitivos), biol?gicos e sociais. O processo de leitura pode ser subdividido, facilitando os estudos e a busca de solu??es para os problemas na forma??o do leitor proficiente. Dentre os subprocessos que envolvem a compreens?o leitora est? a compet?ncia lexical; um dos fatores determinantes na forma??o de um leitor estrat?gico e cr?tico (FINGER-KRATOCHVIL, 2009, 2010). Nos ?ltimos anos, a leitura tem sido tema de in?meros debates e reflex?es, pois testes apontam que muitos brasileiros adultos t?m um limitado desempenho nessa tarefa. Considerando as exig?ncias postas pelas tecnologias digitais aos leitores nos anos 2000, outro tema que tamb?m tem se destacado s?o as m?dias virtuais, que ganham espa?o devido ? expans?o do acesso ? internet nos ?ltimos anos (COLL, MONEREO e cols., 2010). Pesquisadores t?m investigado como as m?dias virtuais podem auxiliar no processo de letramento, tendo em vista seus novos recursos e interfaces, que permitem uma leitura a partir de novos modelos (COSCARELLI, 1999; LEFFA, 2006; MARCUSCHI, 2010). A fim de colaborar com as investiga??es sobre a profici?ncia em leitura, pelo vi?s da Psicolingu?stica, e sua rela??o com as Tecnologias da Informa??o e da Comunica??o, a pesquisa tem como objetivo geral verificar poss?veis contribui??es do blog no processo de constru??o da compet?ncia leitora a partir do desenvolvimento da estrat?gia do uso do dicion?rio para aquisi??o do conhecimento lexical, considerando-se sua recursividade e acessibilidade caracter?sticas. Para isso, objetiva-se especificamente: observar quais estrat?gias de aquisi??o do conhecimento lexical os leitores tendem a utilizar com maior frequ?ncia; verificar em qual das m?dias (blog ou papel) os leitores fazem uso do(s) dicion?rio(s) com maior frequ?ncia; constatar em qual das m?dias h? mais interrup??es no fluxo da leitura e de maior dura??o; averiguar o n?vel de compreens?o leitora dos participantes ao utilizarem-se do blog e do material impresso para a leitura. A pesquisa foi realizada na UFFS, com cinco participantes, educadores de escolas p?blicas de Educa??o B?sica, da zona urbana do munic?pio de Chapec?, adotando-se a abordagem experimental, qualiquantitativa. Por meio desta pesquisa e de seu design metodol?gico, buscamos confirmar a hip?tese de que a recursividade e a facilidade de acesso ?s consultas oferecidas pela interface do blog, como m?dia virtual, favorece a constru??o do conhecimento lexical nas tarefas de leitura, diminuindo o tempo de quebra do fluxo de leitura, melhorando o processo de compreens?o leitora em rela??o ? leitura na m?dia impressa. Os resultados sugerem algumas dificuldades com o manuseio do texto e com o aumento da carga cognitiva dispensada entre o ir e vir da rolagem das p?ginas e a manuten??o do texto na mem?ria de trabalho, conforme W?stlund (2007), na m?dia virtual; o que inibiu o uso dos dicion?rios online dispon?veis no blog. Por?m, o fator principal parece ser a falta de algumas habilidades necess?rias para movimentar-se no ambiente virtual, com a mesma naturalidade com que se movimentam no folhear das p?ginas de papel e na consulta a um dicion?rio impresso. / Reading is admittedly a complex process that involves psychological aspects (cognitive and metacognitive), biological and social. The reading process can be subdivided, facilitating studies and the search for solutions to problems in forming the proficient reader. Among the sub-processes that involve reading comprehension, there is the lexical competence; one of the determining factors in the formation of a (FINGER- KRATOCHVIL, 2009, 2010) strategic and critic reader. In recent years, reading has been the subject of numerous discussions and reflections, because tests show that many Brazilian adults have limited performance in this task. Given the requirements posed by digital technologies for readers in the 2000s, another issue that has also been noted are the virtual medias, which are gaining ground due to the expansion of the internet in recent years (COLL, Monereo et al., 2010). Researchers have investigated how virtual media can assist in the literacy process, in view of its new features and interfaces that allow a reading from new models (COSCARELLI, 1999; Leffa, 2006; Marcuschi, 2010). In order to cooperate with investigations into the reading proficiency at the Psycholinguistics bias, and its relationship with the Information Technology and Communication, this research has as main objective to investigate the contribution of the blog in the building process of reading competence from the development of the strategy of using the dictionary for the acquisition of lexical knowledge, considering their recursion and accessibility features. For this, we aim specifically: observe what strategies for acquiring lexical knowledge readers tend to use most often; check in which supports (paper or blog) readers do use dictionary more frequently; indicate in which brackets the interrupts of the flow of reading are more frequent and of longer duration; ascertain the level of reading comprehension of the participants when using the blog and printed materials as supports for reading. The research was conducted at Universidade Federal da Fronteira Sul (UFFS), with five educators from public schools (of basic education), from the urban area of Chapec?, adopting the experimental, qualitative and quantitative approach. Through this research and its methodological design, we seek to confirm the hypothesis that recursion and easy access to consultations offered by the blog interface (virtual media), favors the construction of lexical knowledge in reading tasks, reducing the breaking time of the reading flow, improving the process of reading comprehension compared to the reading on paper support. The results suggest some difficulties with the handling of text and with increasing cognitive load dispensed between the coming and going of scrolling of pages and text in the maintenance of working memory, as W?stlund (2007), the virtual media; which inhibited the use of online dictionaries available on the blog. However, the main factor seems to be the lack of some necessary skills to move around in the virtual environment, with the same ease with which they move in flip through pages of paper and consultation with a printed dictionary.
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Estudo das caracter?sticas f?sico-qu?micas e biol?gicas pela ades?o de osteoblastos em superf?cies de tit?nio modificadas pela nitreta??o em plasmaSilva, Jos? Sandro Pereira da January 2008 (has links)
SILVA, J. S. P. Estudo das caracter?sticas f?sico-qu?micas e biol?gicas pela
ades?o de osteoblastos em superf?cies de tit?nio modificadas pela nitreta??o
em plasma. 2008. 119 f. Tese (Doutorado) - Faculdade de Medicina, Universidade de S?o
Paulo. S?o Paulo, 2008. / Submitted by CECILIA SANTOS (cecilia@bczm.ufrn.br) on 2010-09-29T13:32:45Z
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license_rdf: 20464 bytes, checksum: d540d98f4c56c073d1d99228e27d53ca (MD5) / PURPOSE: The aim of this study was to evaluated the physico-chemical
properties of different titanium surfaces modified by means of low
temperature plasma nitridind on rat osteoblast cell adhesion and proliferation.
METHODS: Pure Titanium discs grade II was submitted to three different
surface preparations (polishing, glowglow discharge plasma nitriding in planar and
cathodic cage configurations). Surface parameters as roughness, wettability
and chemichal composition was determined to compare influency of gas
mixture on the modified surface material properties. Cellular morphology was
observed by scanning electron microscopy.To evaluate the effect of the
surface on cellular response, osteoblast cells (MC3T3) adhesion and
proliferation was quantified and data analised by Kruskal-Wallis and
Friedman statistical tests. RESULTS: plasma nitriding discs shows rougher
surfaces( p<0,02) in cathodic cage configuration andlower contact angle
values. MC3T3 cells attached on rough surfaces produced by cathodic cage
configuration was statistically significant p<0,05 compared to polished discs.
CONCLUSIONS: Glow discharge plasma nitriding improve titanium surface
roughness and wettability. MC3T3 cell adhesion behavior is related to substrate chemical composition and topography. Resumo: INTRODU??O: Superf?cies de tit?nio modificadas por diferentes m?todos
foram estudadas com base nos par?metros f?sicos e qu?micos de
caracteriza??o superficial e sua influ?ncia no comportamento de c?lulas pr?osteobl?sticas
(MC3T3) in vitro. M?TODOS: Discos de tit?nio
comercialmente puro grau II foram submetidos a tr?s m?todos de
modifica??o de superf?cie (polimento, nitretados em plasma em configura??o
planar e gaiola cat?dica). As diferentes superf?cies foram caracterizadas
para observar o efeito do processamento na estrutura da camada superficial,
na rugosidade e molhabilidade. Ensaios de ades?o e prolifera??o celular
usando linhagens de c?lulas pr?-osteobl?sticas MC3T3 foram realizados
para avaliar o efeito das novas superf?cies no comportamento celular in vitro.
RESULTADOS: Os resultados demonstraram que a nitreta??o em plasma
na configura??o de gaiola cat?dica produz superf?cies mais rugosas (p<0,02)
e com menores ?ngulos de contato com a ?gua. CONCLUS?ES: A ades?o
celular ? maior nas superf?cies mais rugosas do que nas superf?cies polidas
(p<0,05) e reagem de modo diferente a composi??o qu?mica do substrato e ? topografia da superf?cie
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