Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-05-10T18:21:02Z No. of bitstreams: 1 2017 - Bianca Rangel Antunes da Silva.pdf: 2187606 bytes, checksum: 927fe528eb48db49953e8f982d4320d5 (MD5) / Made available in DSpace on 2018-05-10T18:21:02Z (GMT). No. of bitstreams: 1 2017 - Bianca Rangel Antunes da Silva.pdf: 2187606 bytes, checksum: 927fe528eb48db49953e8f982d4320d5 (MD5) Previous issue date: 2017-12-21 / During the drilling of oil wells, the pressure differential between the rock formation and the annular region can cause a filtration process and consequent invasion of drilling fluid into the rocks, causing irreversible damage to the well. Therefore, studies to control the properties of the well formed mudcake are fundamental. The mudcake formed should be thin and of low permeability, thus minimizing the filtration and the invasion of the fluid. The main purpose of this work was to study the characteristics of the filtration pie formed during the drilling process of oil wells, using non-Newtonian fluids that follow the Power law model, and applying the simplified theory of filtration adapted for non-Newtonian fluids to achieve the specific objective that was the lifting of the parameters of permeability, porosity, thickness and correction factor obtained from experimental data of filtered volume versus time, in Static conditions, at different pressures. Experimental results were obtained in different filtration conditions (pressure, viscosifier agent and weighting material) seeking to compare and know the mechanisms that control filtration in static conditions. Filtration tests were carried out at 300 psi, 500 psi and 700 psi, using a HTHP cell and prepared non-Newtonian drilling fluids containing xanthan gum (XG) and carboxymethylcellulose (CMC) as viscosifier agent, in addition to calcite and barite. Filtration parameters such as permeability, porosity, pie thickness, filtration time and filtered volume have been evaluated. The permeability of the pie was determined, with the aid of a software of estimation of parameters, using the simplified theory of filtration adapted for non Newtonian fluids proposed by Massarani and Coelho de Castro(1980). The results obtained were confronted with those obtained by other methodologies. The experimental tests also showed that the properties of the pie vary with the filtration pressure. / Durante o processo de perfura??o de po?os de petr?leo, o diferencial de press?o entre a forma??o rochosa e a regi?o anular pode ocasionar um processo de filtra??o e consequente invas?o de fluido de perfura??o nas rochas, causando opera??es irrevers?veis ao po?o. Por isso, s?o fundamentais estudos para controlar as propriedades da torta de filtra??o formada na parede do po?o. A torta formada deve ser fina e de baixa permeabilidade, minimizando assim a filtra??o e a invas?o do fluido. Este trabalho teve como objetivo principal estudar as caracter?sticas da torta de filtra??o formada durante o processo de perfura??o de po?os de petr?leo, utilizando fluidos n?o Newtonianos que seguem a lei da pot?ncia,e aplicando a teoria simplificada da filtra??o adaptada para fluidos n?o Newtonianos para atingir o objetivo espec?fico que foi o levantamento dos par?metros de permeabilidade, porosidade, espessura e fator de corre??o obtidos a partir de dados experimentais de volume de filtrado versus tempo, em condi??es est?ticas, em diferentes press?es.Foram obtidos resultados experimentais em diferentes condi??es de filtra??o (press?o, viscosificante e adensante) buscando comparar e conhecer os mecanismos que controlam a filtra??o em condi??es est?ticas. Foram realizados ensaios de filtra??o a 300 psi, 500 psi e 700 psi, utilizando uma c?lula HTHP e preparados fluidos de perfura??o n?o-Newtonianos contendo Goma Xantana (GX) e carboximetilcelulose (CMC) como viscosificantes, al?m de barita e calcita. Foram avaliados os par?metros da filtra??o como permeabilidade, porosidade, espessura da torta, tempo de filtra??o e volume de filtrado. A permeabilidadeda torta foideterminada, com o aux?lio de umsoftware de estima??o de par?metros, utilizando-sea teoria simplificada da filtra??o adaptada para fluidos n?o Newtonianos proposta por Massarani e Coelho de Castro (1980). Os resultados obtidos foram confrontados com os obtidos por outras metodologias. Os ensaios experimentais mostraram tamb?m que as propriedades da torta variam com a press?o de filtra??o.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-08-21T14:49:02Z No. of bitstreams: 1 2010 - Otavio Raymundo L?.pdf: 585290 bytes, checksum: ee9c2ebbd0832facdf245e177fef5fa4 (MD5) / Made available in DSpace on 2018-08-21T14:49:02Z (GMT). No. of bitstreams: 1 2010 - Otavio Raymundo L?.pdf: 585290 bytes, checksum: ee9c2ebbd0832facdf245e177fef5fa4 (MD5) Previous issue date: 2010-02-26 / Agricultural use of sewage sludge has become, increasingly, a practice adopted by sanitation companies to solve partly the problem of final disposal of waste. As the sludge to be used generally need to be dry and that the drying process can alter the distribution of metals, the general aim of this study was to evaluate the effect of drying temperature and storage time on chemical parameters and the metal availability and distribution. The specific objectives were: (i) to study how the drying temperature (air, 40?C and 65?C) sludge, associated with the storage time (zero-fresh, and one year), influenced the availability of metals and the possible chemical changes induced in the sludge, (ii) to evaluate how the high content of iron present and the microbial activity affect the availability of metals in the sludge studied, as a function of temperature of drying, and (iii) to characterize the soluble organic fraction leached by infrared absorption spectrometry in samples of dried sludge at different temperatures and stored for one year. Fresh and stored for one year sludge were dried with forced air circulation, grounded and chemical analyzed. The BCR sequential extraction was applied to assess the availability and distribution of metals. The drying of sewage sludge in the air encouraged increasing availability of metals, however, where temperature increased it diminished due to binding of metals with more stable compounds. The reduction of total organic carbon due to volatilization and biodegradation was favored by increased temperature. The decrease in the levels of iron and zinc, with increasing time and temperature drying to constant weight and pH close to neutral, favored readsorption and/or precipitation of metals to less labile forms. The wet sewage sludge, stored in refrigerated conditions (4?C), was subjected to different times and drying temperatures in the greenhouse and, after being re-moistened been and incubated (28 ? 1?C) for zero, one and three days. The methods of fumigation extraction and Mehlich3 were used to assess the microbial activity and availability of metals, respectively. Increased levels of soluble organic carbon and iron were directly related to the increase of incubation time and temperature drying. For leaching, the dried sludge?s were packed in PVC columns of 50 mm and related to the mass of wet sludge, on a dry basis. The increase in drying temperature of the sludge increased the organic carbon dissolved in the leachate extract, without, however, a corresponding increase in metal content in this extract. / A utiliza??o agr?cola de lodos de esgoto tem se tornado, cada vez mais, uma pr?tica adotada pelas companhias de saneamento, para resolver, em parte, o problema da disposi??o final do res?duo. Como o lodo para ser utilizado geralmente necessita estar seco, e que o processo de secagem pode alterar a distribui??o de metais, o objetivo geral deste trabalho foi avaliar o efeito da temperatura de secagem e do tempo de estocagem em par?metros qu?micos e na disponibilidade e distribui??o de metais. Os objetivos espec?ficos foram: (i) estudar em como a temperatura de secagem (ao ar, 40?C e 65?C) do lodo, associada ao tempo de estocagem (zero ? fresco, e um ano), influencia na disponibilidade de metais e quais as poss?veis altera??es qu?micas provocadas no lodo; (ii) avaliar em como os elevados teores de ferro presentes e a atividade microbiana afetam a disponibilidade de metais no lodo estudado em fun??o da varia??o da temperatura de secagem e (iii) caracterizar a fra??o org?nica sol?vel lixiviada por espectrometria de absor??o no infravermelho, nas amostras de lodo secas em diferentes temperaturas e estocadas por um ano. O lodo fresco e estocado por um ano, ap?s secagem em estufa com circula??o for?ada de ar, foi mo?do e submetido ?s an?lises qu?micas. Na avalia??o da disponibilidade e distribui??o de metais foi utilizado o m?todo de extra??o seq?encial do BCR. A secagem do lodo ao ar favoreceu o aumento da disponibilidade de metais, por?m, em temperaturas maiores esta diminuiu devido ? liga??o dos metais com compostos mais est?veis. A redu??o de carbono org?nico total devido ? volatiliza??o e biodegrada??o foi favorecida pelo aumento de temperatura. A diminui??o nos teores de ferro e zinco com o aumento do tempo e da temperatura de secagem a peso constante e o pH pr?ximo da neutralidade favorecem a readsor??o e/ou precipita??o de metais para formas menos l?beis. O lodo de esgoto ?mido, estocado em condi??es refrigeradas (4?C), foi submetido aos diferentes tempos e temperaturas de secagem na estufa e, ap?s ser re-umedecido e incubado (28 ? 1?C) por zero, um e tr?s dias. Para avalia??o da atividade microbiana e disponibilidade de metais foi utilizado o m?todo de fumiga??o extra??o e o extrator Mehlich 3, respectivamente. O aumento dos teores de carbono org?nico sol?vel e ferro foi diretamente relacionado ao aumento do tempo de incuba??o e temperatura de secagem. Para a lixivia??o, as amostras de lodos secas foram empacotadas em colunas de PVC de 50 mm e relacionados ? massa do lodo ?mido, em base seca. O aumento na temperatura de secagem do lodo causou o aumento no teor de carbono org?nico dissolvido no extrato lixiviado, n?o havendo, por?m, aumento correspondente no teor de metais nesse extrato.

Made available in DSpace on 2014-12-17T14:48:13Z (GMT). No. of bitstreams: 1 KievLAP_DISSERT.pdf: 5028363 bytes, checksum: de436550c722f471b673e76a33619bd0 (MD5) Previous issue date: 2012-12-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Este trabalho apresenta um estudo da estabiliza??o qu?mica de um solo com cimento e a avalia??o do uso de cinza de lodo como aditivo estabilizante, investigando o comportamento mec?nico das misturas solo-cimento e solo-cimentocinza para uso em base e sub-base de pavimentos rodovi?rios. Os materiais envolvidos no estudo foram: solo silte-areno argiloso, cimento Portland comum e lodo esgoto calcinado de uma lagoa anaer?bia. A metodologia envolveu o estudo dos materiais, com ensaios de caracteriza??o geot?cnica do solo e mec?nica das misturas solo-cimento e solo-cimento-cinza de lodo (SCCLE). As moldagens dos corpos de prova para o ensaio de compacta??o do solo e solo-cimento foram nas energias normal, intermedi?ria e modificada e os teores de cimento adicionados ao solo foram 0%, 3%, 6% e 9%, no qual para cada tra?o/energia foram moldados 3 cp?s, sendo nesta etapa confeccionados 36 cp?s. A adi??o em percentual do cimento ao solo foi feita em rela??o massa do solo seco. Com os pontos da umidade retirados da curva de compacta??o do solo na energia normal, foram moldados 5 cp?s para o ensaio de CBR. O melhor resultado foi o do cp com umidade pr?xima a da umidade ?tima. Seu valor foi de 6,13% e obteve-se expans?o de 0,02%. Foi verificado a partir dos resultados do ensaio de CBR do solo a necessidade de sua estabiliza??o tendo em vista que para o uso em camadas de vi sub-base e base s?o exigidos valores m?nimos de 20% e 80% respectivamente segundo a especifica??o do DNER ES 301/97. No estudo da estabiliza??o do solo foi utilizada como refer?ncia a resist?ncia m?nima ? compress?o simples para base e sub-base que ? de 21 kgf/cm? de acordo com a especifica??o de servi?o ES 305/97 do DNER. O tra?o T4I foi o escolhido para adi??o de cinza, composto por 91% de solo + 9% de cimento na energia intermedi?ria, cuja resist?ncia foi de 22,61 kgf/cm? e este valor lhe credenciou aos padr?es de camadas de base e sub-base. A adi??o cinza de lodo foi feita nos percentuais de 5%, 10%, 20% e 30% e o percentual de cinza foi calculado em rela??o ? massa do solo seco, tendo sido nesta fase moldados 12 cp?s. Foi observado incremento da RCS em todos os tra?os contendo a cinza, sendo mais satisfat?rio o tra?o T7I com um ganho de 25,87% de resist?ncia em rela??o ao tra?o T4I de refer?ncia contendo solo-cimento. A partir do estudo de estabiliza??o podemos inferir que o solo n?o ? expansivo podendo ser usado em camadas de pavimentos ap?s a estabiliza??o com cimento e a cinza de lodo pode ser usada como aditivo estabilizante, visando reduzir os custos com o cimento e diminuir a polui??o com o descarte do res?duo no meio ambiente

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-26T23:58:51Z No. of bitstreams: 1 BeneditaCleideDeSouzaCampos_DISSERT.pdf: 4403566 bytes, checksum: c3c751a75b003cb890a6499c81c7642f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-31T22:03:44Z (GMT) No. of bitstreams: 1 BeneditaCleideDeSouzaCampos_DISSERT.pdf: 4403566 bytes, checksum: c3c751a75b003cb890a6499c81c7642f (MD5) / Made available in DSpace on 2016-08-31T22:03:44Z (GMT). No. of bitstreams: 1 BeneditaCleideDeSouzaCampos_DISSERT.pdf: 4403566 bytes, checksum: c3c751a75b003cb890a6499c81c7642f (MD5) Previous issue date: 2016-02-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A qu?mica mineral de granitos, juntamente com revis?o de dados qu?micos de rocha total e petrografia foram utilizados para determinar as condi??es de cristaliza??o e as implica??es na g?nese de granitos C?lcio-alcalinos de alto K Porfir?ticos. Seis corpos gran?ticos foram analisados: Monte das Gameleiras, Barcelona, Acari, Cara?bas, Tour?o e Catol? do Rocha, localizados nos dom?nios Rio Piranhas-Serid? e S?o Jos? de Campestre, NE do Brasil. Os pl?tons s?o representados por monzogranitos, texturalmente possuem f?cies porfir?tica compreendendo fenocristais de K-feldspato com tamanhos entre 5 a 15 cm. K-feldspato, plagiocl?sio e quartzo constituem a parag?nese f?lsica e dominante; enquanto biotita e anfib?lio representam os minerais m?ficos principais; titanita, minerais opacos, allanita, ep?doto, apatita e zirc?o s?o os principais acess?rios. Em rela??o ao ?ndice de Shand o granito Monte das Gameleiras mostra-se mais metaluminoso, enquanto os outros seguem a transi??o metaluminoso a peraluminoso. Em diagramas discriminantes qu?micos estes se apresentam com car?ter transicional (subalcalino). As an?lises de petrografia e qu?mica n?o exp?e as diferen?as dos granitos, por?m os resultados de qu?mica mineral revelam as diferen?as dos mesmos e podem ser divididos em dois grupos: a leste (Monte das Gameleiras, Barcelona e Acari) e a oeste (Cara?bas, Tour?o e Catol? do Rocha). As raz?es Fe/(Fe+Mg) da biotita mostra um aumentam do grupo leste para oeste com valores de 0,48 a 0,64 e 0,66 a 0,92 respectivamente. As raz?es Mg/(Mg+Fe2) do anfib?lio diminui nesse sentido com valores de 0,40 a 0,57 e 0,06 a 0,31. As condi??es de cristaliza??es para os granitos a leste (Monte das Gameleiras, Barcelona e Acari) mostram press?o entre 4.2 kbar a 5.8 kbar, com profundidades que variam de 15,9 km a 20,5 km a uma temperatura entre 710 ?C a 734?C e a oeste (Cara?bas, Tour?o e Catol? do Rocha) com press?es de 5,4 kbar a 7,1 kbar e profundidades que variam de 20 km a 23 km a uma temperatura entre 729 ?C - 753 ?C. Ambas as ?reas, tanto leste como oeste foram gerados a partir de magmas oxidados. As profundidades das intrus?es gran?ticas podem estar relacionadas aos deslocamentos de falhas e ao alto conte?do de ?gua e vol?teis que permitem que o magma de alguns plutons atinja n?veis mais rasos em rela??o aos outros. Os resultados mostram um aumento sistem?tico de temperatura e press?o de cristaliza??o dos pl?tons de leste para oeste sugerindo um espessamento crustal nessa dire??o nos dois dom?nios geol?gicos pesquisados. / The mineral chemistry from granites, chemical of whole rock and review of petrography were used to determine the crystallization conditions and the implications in the genesis of high-K calc-akaline granites that are porphyritics, localizated in the Rio Piranhas-Serid? (RPSD) and S?o Jos? de Campestre Domains (SJCD). Six granitic bodies were analyzed and that for the intrusive granites within the SJCD were named East granites: Monte das Gameleiras, Barcelona. The Acari granite intrudes the area RPSD, however, was called as granite east due to the characteristics of mineral chemistry is similar to east granites. Granites Cara?bas, Tour?o and Catol? do Rocha are intrusive in the RPSD and called west granites. The six bodies are located in the northeast of the Borborema Province, NE Brazil. The plutons are represented by monzogranites wich have porphyritic facies with phenocrysts of K-feldspar with sizes between 5 and 15 cm. The K-feldspar, plagioclase and quartz are the dominant paragenesis; while the biotite and amphibole are the main mafic minerals; and titanite, opaque minerals, allanite, epidote, apatite and zircon are the accessories minerals. The Monte das Gameleiras granite shows metaluminous aluminium saturation index, whereas the others plutons metaluminous to peraluminous. In geochemical diagrams, the granites present with transitional character (subalcalino). The petrographic and geochemical analysis didn't show the differences between the plutons, but according to the mineral chemistry they can be divided into two groups: Monte das Gameleiras, Barcelona and Acari (east) and Cara?bas, Tour?o e Catol? do Rocha (west). The Fe/(Fe + Mg) ratio of biotite shows an increase from east to west group with values from 0.45 to 0.64 and 0.66 to 0.92 respectively, and the Mg / (Mg + Fe2) of amphibole decreases with values from 0.40 to 0.57 and from 0.07 to 0.31. The crystallization parameters of east granites, The crystallization conditions for granites east (Monte das Gameleiras, Barcelona and Acari) show pressure between 3.8 kbar to 5.5 kbar, with depths ranging from 14 km to 21 km at a temperature between 701 ? C to 742?C and west (Cara?bas, Tour?o and Catol? Rock) with pressures to 4.8 kbar to 6.2 kbar and depths ranging from 18 km to 23 km at a temperature between 723 ? C - 776 ? C. Both areas, east and west were generated from magmas oxidized with ?FQM values (-1 a +2.0). The depths of granite intrusion failures may be related to offsets and high water content and volatile that allow the magma some plutons reaches shallower levels in relation to the other. The results show a systematic increase in temperature and crystallization pressure east of plutons west suggesting crustal thickening in that direction. The results show a systematic increase in temperature and crystallization pressure east to west plutons, suggesting crustal thickening in that direction in the two domains studied.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-19T13:34:45Z No. of bitstreams: 5 gui.pdf: 4235660 bytes, checksum: a4da31a1b3421bf1fd546fc015611c65 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-20T10:39:27Z (GMT) No. of bitstreams: 5 gui.pdf: 4235660 bytes, checksum: a4da31a1b3421bf1fd546fc015611c65 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Made available in DSpace on 2015-02-20T10:39:27Z (GMT). No. of bitstreams: 5 gui.pdf: 4235660 bytes, checksum: a4da31a1b3421bf1fd546fc015611c65 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) Previous issue date: 2013-12-17 / Realizou-se a s?ntese de doadores e receptores glicos?dicos in?ditos que foram utilizados numa s?ntese convergente de um precursor da adenofostina A. Igualmente, a converg?ncia das sintonas tinha como prop?sito principal o estudo de rea??es de glicosila??o, ou seja, foram explorados dois m?todos de forma??o de liga??es glicos?dicas: o m?todo do tricloroacetoimidato e o m?todo de isomeriza??o do doador glicos?dico al?lico. A prepara??o dos aceptores e doadores glicos?dicos envolveu sequ?ncias de prote??o e desprote??o de grupos hidroxila a partir da adenosina e da D-glicose, respectivamente, privilegiando-se a forma??o de doadores armados e a observa??o da estereoqu?mica no carbono anom?rico. Os an?meros ? e ? formados nesta sequ?ncia de s?ntese foram separados, mas somente os an?meros ? foram motivo de caracteriza??o pelos m?todos de an?lise usuais de espectrometria RMN 1D e 2D, de massas e no infravermelho. Dessa forma, foram sintetizados dois aceptores glicos?dicos (17) e (18) e cinco doadores glicos?dicos (9), (11?), (11?), (13?) e (13?), sendo todas as subst?ncias in?ditas. Dentre os ensaios de glicosila??o somente o m?todo do tricloroacetoimidato produziu o produto desejado (glicosila??o entre 11? e 17) cuja caracteriza??o estrutural encontra-se em andamento. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / ABSTRACT This works discusses the synton?s synthesis of the, unpublished glycosidic donors and aceptors that have been used in a convergent synthesis of a precursor of adenophostin A. Furthermore, the convergence of syntons main purpose was to study the glycosylation, ie been explored two methods of forming glycosidic linkages, the method of trichloroacetimidate and method of isomerization of the allyl glycoside donor. The preparation of donors and acceptors glycosidic sequences involving protection and deprotection of hydroxyl groups from adenosine and D-glucose, respectively, favoring the formation of armed donors and observation of stereochemistry at anomeric carbon. The and anomers formed in this synthesis sequence were separated, but the only reason anomers were characterization by usual methods of analysis of 1D and 2D NMR spectroscopy, mass and infrared. Thus, we synthesized two glycoside acceptors (17) and (18) and five donor glycoside (9), (11), (11), (13) and (13), all substances are novel. Among the glycosylation assays only the method of tricloroacetimidate gave the desired product (glycosylation between 11 and 17) that is the object of characterizing and whose data has not yet been completed and conclusive.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T13:40:49Z No. of bitstreams: 5 ana.pdf: 1542449 bytes, checksum: 6abec3dbd7b8c5cd7aec1cd8cc44d636 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-27T18:10:12Z (GMT) No. of bitstreams: 5 ana.pdf: 1542449 bytes, checksum: 6abec3dbd7b8c5cd7aec1cd8cc44d636 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Made available in DSpace on 2015-02-27T18:10:13Z (GMT). No. of bitstreams: 5 ana.pdf: 1542449 bytes, checksum: 6abec3dbd7b8c5cd7aec1cd8cc44d636 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) Previous issue date: 2013-02-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O presente trabalho descreve o desenvolvimento de um sensor voltam?trico altamente seletivo e sens?vel para dopamina (DA), ?cido asc?rbico (AA) e ?cido ?rico (AU) utilizando um eletrodo de grafite pirol?tico de plano basal modificado com 1,4-naftoquinona adsorvida sobre nanotubos de carbono de paredes m?ltiplas (EGPPB/NTCPM/NQ). Imagens de Microscopia Eletr?nica de Varredura foram utilizadas para caracterizar os materiais. Os processos de oxida??o de DA, AA e AU foram investigados por Voltametria C?clica (VC) e Voltametria de Pulso Diferencial (VPD). O eletrodo modificado apresentou excelente atividade catal?tica para oxida??o de DA, AA e AU, fornecendo tr?s picos voltam?tricos bem definidos em aproximadamente ? 0,050, 0,145 e 0,270 V vs. Ag/AgCl, respectivamente, por VPD. Ap?s a otimiza??o dos par?metros experimentais (solu??o 0,1 mol L-1 de tamp?o fosfato pH 7,5), obteve-se as curvas anal?ticas para DA, AA e AU, cujas faixas de linearidade foram 10,0-70,0 nmol L-1, 40,0-280,0 ?mol L-1 e 2,0-14,0 ?mol L-1, respectivamente. Os limites de detec??o e sensibilidade foram, respectivamente, 0,126 nmol L-1 e 0,653 ?A/ nmol L-1 para DA, 2,136 ?mol L-1 e 0,076 ?A/ ?mol L-1 para AA e 0,018 ?mol L-1 e 9,888 ?A/ ?mol L-1 para AU. O sensor foi aplicado com sucesso em amostras de urina humana e os resultados mostraram que o mesmo n?o sofre interfer?ncia da matriz biol?gica. Estudos de adi??o e recupera??o dos analitos foram realizados para avaliar a exatid?o do m?todo e obteve-se uma porcentagem de recupera??o entre 95,14% e 101,49% para DA, 96,10% e 103,47% para AA e 97,90% e 102,32% para AU. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2012. / The present work describes the development of a highly selective and sensitive voltammetric sensor for dopamine (DA), ascorbic acid (AA) and uric acid (AU) using a basal plane pyrolytic graphite electrode modified with 1,4-naphthoquinone adsorbed on multi-walled carbon nanotubes (EGPPB/NTCPM/NQ). Images of Scanning Electron Microscopy were used to characterize the materials. Oxidation process of DA, AA and AU were investigated by Cyclic Voltammetry (VC) and Differential Pulse Voltammetry (VPD). The modified electrode showed an excellent catalytic activity towards the oxidations of DA, AA and AU, providing three well-defined voltammetric peaks at ? 0.050, 0.145 e 0.270 V vs. Ag/AgCl, respectively, by VPD. After optimization of experimental parameters (0.1 mol L-1 phosphate buffer solution pH 7.5), the calibration plots were obtained for DA, AA and AU, in the range from 10.0 up to 70.0 nmol L-1, 40.0 up to 280.0 ?mol L-1 and 2.0 up to 14.0 ?mol L-1, respectively. The detection limit and sensitivity were, respectively, 0.126 nmol L-1 and 0.653 ?A/ nmol L-1 for DA, 2.136 ?mol L-1 and 0.076 ?A/ ?mol L-1 for AA and 0.018 ?mol L-1 and 9.888 ?A/ ?mol L-1 for AU. The sensor developed has been successfully applied in human urine samples and the results showed that the matrix biological does not affect the response of the sensor. Studies of addition and recovery for DA, AA and AU were carried out to evaluate the error of the method and was verified a recovery percentage between 95.14% and 101.49% for DA, 96.10% and 103.47% for AA and 97.90% and 102.32% for AU.

Disponibiliza??o do conte?do parcial, conforme Termo de Autoriza??o no trabalho. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2016-12-21T19:05:57Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) wbiratan_cesar_macedo_oliveira_parcial.pdf: 128173 bytes, checksum: 9c9067430cf3b7ef9b7952182484b258 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-01-31T14:19:01Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) wbiratan_cesar_macedo_oliveira_parcial.pdf: 128173 bytes, checksum: 9c9067430cf3b7ef9b7952182484b258 (MD5) / Made available in DSpace on 2017-01-31T14:19:01Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) wbiratan_cesar_macedo_oliveira_parcial.pdf: 128173 bytes, checksum: 9c9067430cf3b7ef9b7952182484b258 (MD5) Previous issue date: 2016 / 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) / Neste trabalho foi estudado o comportamento de extra??o do lant?nio em sistemas aquosos bif?sicos (SAB) e foi desenvolvido um novo m?todo hidrometal?rgico ambientalmente seguro para a extra??o seletiva de La a partir de lixiviado de baterias NiMH. O comportamento de extra??o do La foi avaliado verificando a influ?ncia dos seguintes par?metros: presen?a e concentra??o de diversos agentes extratantes (Alaranjado de xilenol, 1-(2-piridilazo)-2-naftol, Ditizona, 8-hidroxiquinolina, e 1,10-fenantrolina); pH (3,00, 6,00 e 9,00); eletr?lito (Li2SO4, Na2SO4, MgSO4, Na2C4H4O6 e Na3C6H5O7 ) e pol?mero (L64 e PEO1500) formadores do sistema. A efici?ncia de recupera??o foi avaliada atrav?s da an?lise da porcentagem de extra??o (% E) e as melhores condi??es de extra??o do analito foram obtidas no SAB formado por PEO1500 + Li2SO4 + H2O, pH = 6,00; empregando o extratante 1,10-fenantrolina, atingindo um valor m?ximo de %E = 74,1 %. Na sequencia o m?todo foi aplicado a um lixiviado de bateria NiMH. Os terras raras foram precipitados mediante ajuste de pH (2,50) e posteriormente solubilizado em solu??o de H2SO4 0,1 M. Ap?s 3 etapas sucessivas de extra??o foram obtidos altos valores de fator de separa??o (S) entre o analito e os concomitantes met?licos (SLa,Co = 6.3 x 103, SLa,Ni= 2,55 x 104, SLa,Fe= 1,15 x 103 and SLa,Ce= 30,9). Al?m disso, foi realizado um ensaio de stripping no qual 88,5% de La, em uma ?nica etapa, foi redisponibilizado sob a forma i?nica na FI para uma poss?vel etapa posterior de eletrodeposi??o. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / In this work was investigated the extraction behavior of lanthanum in the aqueous two-phase system (ATPS) and new environmentally safe hydrometallurgical method was developed for the selective extraction of La from NiMH battery leachate. The extraction behavior of La was evaluated verifying the influence of the following parameters on the metals extraction: presence and concentration of the several extractants 1-(2-piridil-azo)-2-naphtol, dithizone, 8-hydroxyquinoline, 1-10 phenanthroline and xylenol oragne; pH (3.00, 6.00 and 9.0); ATPS-forming electrolyte ((Li2SO4, Na2SO4, MgSO4, Na2C4H4O6 e Na3C6H5O7); ATPS-forming polymer (L64 or PEO1500). The recovery efficiency was evaluated through analyzing the extraction percentage (%E) and the best conditions for analyte extraction were achieved for the PEO1500 + Li2SO4 ATPS, pH = 6.00, using 1-10 phenanthroline as extractant agente (%E = 74,1 %). In the following section, the method was applied to a real NiMH battery leachate. The rare earths were precipitated by pH adjustment (2.50), which was solubilized in 0,1 M H2SO4 solution. After 3 steps of successive extractions it was possible to obtain high separation factor (S) values between the analyte and mettalic concomitant (SLa,Co = 6.3 x 103, SLa,Ni = 2,55 x 104, SLa,Fe = 1,15 x 103 and SLa,Ce = 30,9). Moreover, a stripping assay was carried out and after one single step, 88.5% of lanthanum was available to a possible electro winning step.

Made available in DSpace on 2014-12-17T14:36:18Z (GMT). No. of bitstreams: 1 MarciaCDLB.pdf: 1432931 bytes, checksum: 843e330dc57fa7d60551d3fd89dbed8c (MD5) Previous issue date: 2009-11-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The purpose of this work is to approach and understand the Social Representations (SR) (MOSCOVICI, 2003) about Physics and Chemistry from people who are major in these courses, as well as their Social Representations about teaching . We took as principle that approaching these representations it would be possible to relate their symbolic contents, in order to show how people who are following the first segments of bachelor degree courses in Physics and Chemistry become teachers, taking into account a psychosocial view. Two source of data was used during this research: Free-association Technique FA (ABRIC, 1994); and Multiple Classification Procedure (MCP) (ROAZZI, 1995). The analytical treatment of the collected data from FA was done according to the proposition of Grize, Verg?s and Silem (1987 apud ABRIC, 1994, p. 66). MCP data were analyzed through MSA (Multidimensional Scalogram Analysis) and SSA (Singular Spectrum Analysis) methods associated with the Facet Theory (BILSKY, 2003). The discourses of MCP discussing groups at the moment of explanations were studied by Content Analysis as it was proposed by Bardin (1977) and Franco (2005). Indicative of an approach to the relations with knowledge (CHARLOT, 2000), the connections which aroused from the analyses showed that the group of future majors in Physics thought that this scientific field was based on a rationalist conception, influencing the idealization sense of the phenomena to be explained by Physics. Thus, Physics as school content started to require the student of the fundamental and high school to think abstractly as a cognitive skill of learning. The identifying elements observed in the relations between SR about Physics and Teaching aroused from the antagonism between future majors and their teacher, as well as from the speculation between their fundamental and high school students and themselves, mainly when they had to face the act of teaching due to the obstacles imposed by the own educational system, and by the weakness of the initial preparation. The group of future majors in Chemistry, through its discourses, showed these relations when they conceived empiricist Chemistry and said that teaching was the way of transmission of this knowledge, and didactics of Chemistry teaching was the direction to learning through pedagogic methods in order to lead the students to discoveries. The psychosocial contents which were built and showed from the symbolic relations in the studied SR achieved the relation of identity. This relation revealed identifying elements for these people, resulting from the traffic between their condition as students of Chemistry, and as teachers regarding their work, what placed the current relational contents in the teaching space, named as Knowledge changing and Adaptability . In order to study emerging questions in the discussing environment about formation and teaching professionalization, we focused the psychosocial view on this traffic and managed to observe epistemological practical and pedagogic obstacles that limited a configuration of the teaching work as a professional activity, especially from the particular conditions which led the relations of senses to Physics , Chemistry and Teaching ; and Chemistry and Physics as it was seen in this research. Generally speaking, we noted that these obstacles can denounce such obstacles concerning to the pedagogic doings which mainly impair the learning process of fundamental and high school students / O objetivo deste trabalho foi acessar e compreender as Representa??es Sociais (RS).(MOSCOVICI, 2003) sobre F?sica e Qu?mica para os grupos de licenciandos destes cursos, como tamb?m suas Representa??es Sociais sobre o Ensinar . Partimos do princ?pio de que o acesso a tais representa??es nos daria condi??es de articular seus conte?dos simb?licos, com o intuito de responder a como os grupos de licenciandos em F?sica e Qu?mica no percurso de forma??o inicial v?o-se tornando professores, sob uma ?tica psicossocial. Nesta pesquisa foram usadas duas fontes de dados: a T?cnica de Associa??o Livre AL (ABRIC, 1994); e o Procedimento de Classifica??o M?ltipla (PCM) (ROAZZI, 1995). O tratamento de an?lise do material coletado na AL foi feita pela proposi??o de Grize, Verg?s e Silem (1987 apud ABRIC, 1994, p. 66). Os dados do PCM foram submetidos a an?lises multidimensionais MSA e SSA, sendo estas ?ltimas associadas ao uso da Teoria das Facetas (BILSKY, 2003). As manifesta??es discursivas dos licenciandos produzidas nos momentos das explica??es dos agrupamentos dos PCM foram analisadas pela An?lise de Conte?do proposta por Bardin (1977) e Franco (2005). Indicativo de um trabalho de abordagem sobre rela??es com saberes (CHARLOT, 2000), as articula??es que emergem a partir das an?lises apontam com rela??o ao grupo de licenciandos em F?sica, que esta ci?ncia estava calcada na concep??o racionalista. Quando transformada em objeto de ensino, a F?sica Conte?do Escolar passou a demandar do aluno do ensino fundamental e m?dio a abstra??o, como habilidade cognitiva facilitadora da aprendizagem. Os elementos identit?rios assinalados nas articula??es entre as RS de F?sica e de Ensinar , emergiram da rela??o antag?nica entre os licenciandos e o professor formador, como tamb?m da rela??o especular entre eles mesmos e seus alunos de ensino fundamental e m?dio, e, sobretudo, quando enfrentam o fazer docente, devido ?s dificuldades impostas pelo pr?prio sistema educacional e pela fragilidade do curso de forma??o inicial. O grupo de licenciandos em Qu?mica sinalizou em seus discursos tais articula??es, quando conceberam Qu?mica ci?ncia empirista e afirmavam ser o Ensinar como transmiss?o desse conhecimento e a Did?tica do ensino de Qu?mica como dire??o para a aprendizagem pela utiliza??o de m?todos pedag?gicos, no sentido de levar o aluno a descobertas. Os conte?dos psicossociais constru?dos e manifestos nas rela??es com as articula??es simb?licas das RS estudadas estenderam-se ? rela??o de identidade. Esta rela??o, para este grupo, apontou elementos identit?rios resultantes do tr?nsito entre sua posi??o de alunos com rela??o ao saber Qu?mica e como professores na rela??o com o trabalho docente, trazendo os conte?dos relacionais da? decorrentes para o espa?o do ensinar, anunciado pela Troca de Conhecimento e Jogo de Cintura . Dando conta de quest?es emergentes no cen?rio das discuss?es sobre forma??o e profissionaliza??o docente, o olhar psicossocial acerca desse tr?nsito p?de ensejar obst?culos epistemol?gicos, pr?ticos e pedag?gicos limitadores de uma configura??o do trabalho de ensino como atividade profissional, especialmente pelas condi??es particulares em que foram constru?das as articula??es dos sentidos para F?sica e Ensinar ; e Qu?mica e Ensinar aqui tratados. Pudemos observar que, em tese, tais obst?culos podem denunciar implica??es aos fazeres pedag?gicos que dificultam principalmente o processo de aprendizagem dos alunos do ensino fundamental e m?dio

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-30T23:24:06Z No. of bitstreams: 1 JoselisseSoaresDeCarvalhoSantos_TESE.pdf: 16053934 bytes, checksum: cf451c4ddd4d01f3d1adc928b9fb2590 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-02T19:17:42Z (GMT) No. of bitstreams: 1 JoselisseSoaresDeCarvalhoSantos_TESE.pdf: 16053934 bytes, checksum: cf451c4ddd4d01f3d1adc928b9fb2590 (MD5) / Made available in DSpace on 2016-06-02T19:17:42Z (GMT). No. of bitstreams: 1 JoselisseSoaresDeCarvalhoSantos_TESE.pdf: 16053934 bytes, checksum: cf451c4ddd4d01f3d1adc928b9fb2590 (MD5) Previous issue date: 2015-10-19 / A recupera??o avan?ada de petr?leo tem sido foco de in?meras pesquisas buscando o melhoramento da recupera??o do ?leo in place dos reservat?rios, isto porque os reservat?rios maduros e/ou aqueles que possuem ?leos muito viscosos precisam de meios que auxiliem no escoamento e conseq?ente produ??o. Diante disto, foram estudadas as propriedades f?sico-qu?micas, entre estas propriedades verificaram-se o comportamento reol?gico e a tens?o superficial dos pol?meros, variando a concentra??o e a temperatura. Ap?s a obten??o da concentra??o de overlep, foi analisada a tens?o interfacial da solu??o de petr?leo/poliacrilamidas e, estas em presen?a de tensoativo e EDTA. Tamb?m, observou-se a permeabilidade destas solu??es, modificando a concentra??o. Com isso, o objetivo desta caracteriza??o foi observar a viabilidade destas solu??es nos processos de deslocamento de petr?leo em meio poroso. Os resultados obtidos mostraram que o aumento da ionicidade das poliacrilamidas promove um aumento da viscosidade no meio. No caso da temperatura seu aumento reduz a viscosidade para as poliacrilamidas de baixa ionicidade, a aumenta a viscosidade das poliacrilamidadas de alta ionicidade. Quanto a permeabilidade, verificou-se que os pol?meros ani?nicos apresentaram press?es mais elevadas em compara??o aos pol?meros de baixa ionicidade, e acredita-se que esse comportamento esteja relacionado ?s viscosidades destes pol?meros, que s?o mais altas. Na tens?o superficial observou-se a regi?o da concentra??o de overlep de cada pol?mero, consequentemente foi observado que as cargas i?nicas n?o influenciaram consideravelmente na redu??o das tens?es interfaciais entre o ?leo e as poliacrilamidas e constataram-se redu??es das IFT de todas as solu??es estudadas quando comparada ao caso ?gua/petr?leo. Tal resultado ? um bom ind?cio para seu uso no processo de recupera??o avan?ada de petr?leo. Finalmente, ao injetar as solu??es estudadas no meio poroso, verificou-se que as solu??es de pol?meros com maior ionicidade em presen?a de tensoativo e EDTA promoveram uma sinergia na recupera??o avan?ada de petr?leo, quando comparadas ?s solu??es contendo apenas pol?meros. / Enhanced oil recovery has been the focus of countless research projects aiming for the improvement of the in place oil recovery from the reservoirs, especially because mature fields and/or fields containing heavy oil require further assistance to ensure oil flow and consequent production. Having that in mind, physical and chemical properties such as the rheological behaviour and the superficial tension of polymers, for different concentrations and temperatures, were studied. After obtaining the polymers critical aggregation concentration (c.a.c.), the interfacial tension (IFT) between the polyacrylamide/oil solutions was evaluated, as well as for the solutions containing surfactant (SB) and EDTA. The permeability and the application of those solutions in enhanced oil recovery of those solutions was also observed using the Botucatu arenite. The results obtained demonstrated that the increase in the polymers ionicity promotes an increase in the solution viscosity. An increase in temperature reduced the viscosity for the low ionicity polyacrylamides, but caused an increase in the viscosity for some of the high ionicity ones. Concerning permeability, the anionic polymers presented higher injection pressure values when compared to the lower ionicity ones, and that behaviour is believed to be related to the viscosities of those polymers, which are higher. Regarding superficial tension, the c.a.c. region for each polymer was observed, and the conclusion was that the ionic charges had little or no influence in the reduction of interfacial tensions between the oil and the polymers, while the decrease in IFT for all solutions was observed when compared to the system formed by water and oil. The aforementioned results are a good indicator that the polymers studied are suitable for the enhanced oil recovery process. By injecting the solutions into the porous media, it was observed that the solutions formed by SB associated to EDTA improved the flow inside the porous media. The results indicated that the enhanced oil recovery using the polymer/ surfactant/ EDTA solutions reached a recovery factor of 18 % of the original oil. In addition, it could be observed that polymers presenting the higher ionicity, associated to surfactant and EDTA, promoted a synergy in the enhanced oil recovery when compared to the solutions containing only polymers.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-15T00:32:07Z No. of bitstreams: 1 PriscillaFernandesDeFaria_DISSERT.pdf: 470162 bytes, checksum: fa888637c9b8d78f143bf6e83736bce1 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-20T19:25:08Z (GMT) No. of bitstreams: 1 PriscillaFernandesDeFaria_DISSERT.pdf: 470162 bytes, checksum: fa888637c9b8d78f143bf6e83736bce1 (MD5) / Made available in DSpace on 2016-06-20T19:25:08Z (GMT). No. of bitstreams: 1 PriscillaFernandesDeFaria_DISSERT.pdf: 470162 bytes, checksum: fa888637c9b8d78f143bf6e83736bce1 (MD5) Previous issue date: 2015-08-05 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O objetivo deste trabalho foi identificar a ocorr?ncia de leite inst?vel n?o ?cido nasmesorregi?es oeste e central do Rio Grande do Norte, bem como avaliar a qualidade doleite. Foram analisadas 92 amostras, ao longo de 4 meses, provenientes de 23 tanques deresfriamento. Foi realizado o teste do ?lcool a 68%, 72% e 76%, al?m da mensura??o dopH, acidez, gordura, prote?na, s?lidos totais, nitrog?nio ureico, lactose, case?na e contagemde c?lulas som?ticas. A incid?ncia de LINA foi de 15,91%, e n?o houve diferen?asignificativa na composi??o do LINA em rela??o ao leite est?vel em nenhuma dasgradua??es alco?licas. Nenhuma amostra de LINA apresentou coagula??o na prova dafervura. Tais resultados permitem concluir que apesar das in?meras adversidades clim?ticase nutricionais existentes na regi?o, o LINA n?o representa um problema aparente / The unstable non acid milk (UNAM) is characterized by coagulation in the alcohol test and wanted acidity (14-18?D). Among Brazilian regions, the South and Southeast have the highest occurrence of LINA, which has been causing problems for both producers and for industries, due to the disposal or undervaluation of milk. In the Northeast there are few studies that indicate their occurrence and quality. The objective of this study was to identify the occurrence of unstable non-acid milk in the west and central mesoregions of Rio Grande do Norte, determine their physicochemical characteristics, test alcoholic graduations and evaluate their correlation with the quality of milk. 176 raw milk samples were analyzed in the period from September to December /2014 from 23 APASA?s cooling tanks, located in 7 cities of west and central mesoregions RN. The samples were collected in duplicate, one sample used for alcohol testing at 68, 72 and 76%, measurement of pH, acidity, electrical conductivity and boiling proof, made in LABOLEITE / UFRN; and the other sample containing Bronopol? preservative, was sent to the APCBRH (Cattle Breeders Association Paranaense Holstein) laboratory in Curitiba-PR, which were analyzed fat, protein, total solids, lactose, casein, urea nitrogen and somatic cell count. The test alcohol samples disapproved 31.82%, of which 30% proved to be non-acid, and 30% had high acidity. The samples were divided into three classes: Stable Milk, UNAM and acid milk. 3% Tukey test was used for comparison of stable milk components and UNAM and there was no significant difference between them. Both classes obtained averages within the standard required by IN 62. The average value of electric conductivity was 4.84 mS/cm for stable milk, 4.55 mS/cm for unstable and acid milk and 4.53 mS/cm for non-acid unstable milk. The electrical conductivity was positively correlated with alcohol stability of milk and negative correlation with acidity and pH. Could not observe direct relationship between the electrical conductivity and the somatic cell count.The boiling test was negative for all samples UNAM. It can be concluded that the incidence of UNAM in the studied region is low, although the predisposing factors such as heat stress, drought and nutritional deficiency. In conclusion, the UNAM has quality similar to stable milk, conform the norms required by Agriculture Ministry, and with adequate thermal stability, which proves that there is no reason to reject this milk by industry.