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Sample records for bentonitas calcicas espanolas

  1. Research program to study the gamma radiation effects in Spanish bentonites; Programa de investigacion para estudiar los efectos de la radiacion gamma en bentonitas calcicas espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Dies, J.; Tarrasa, F. [Universidad Politecnica de Catalunya (Spain); Cuevas de las, C.; Miralles, L.; Pueyo, J. J. [Universidad de Barcelona (Spain)

    2000-07-01

    The engineering barrier of a radioactive waste underground disposal facility, placed in a granitic host rock, will consist of a backfill of compacted bentonite blocks. At first, this material will be subjected to a gamma radiation field, from the waste canister, and heat from the spent fuel inside the canister. Moreover, any groundwater that reaches the repository will saturate the bentonite. For these reasons the performance of the engineered barrier must be carefully assessed in laboratory experiments. (Author)

  2. CARACTERIZACIÓN ESTRUCTURAL Y TEXTURAL DE UNA BENTONITA COLOMBIANA

    Directory of Open Access Journals (Sweden)

    José Carriazo

    2008-04-01

    Full Text Available En el presente trabajo se caracteriza una arcilla-bentonita colombiana (Valle del Cauca, mediante difracción de rayos X, técnicas espectroscópicas (IR, RMN y EPR y análisis textural. Los resultados indican que el componente principal en este material natural es una esmectita dioctaédrica (aluminosa. Igualmente, los resultados de RMN de 29Si y de 27Al revelan la substitución isomórfica de Al3+ por Si4+ en la capa tetraédrica. El estudio de EPR evidencia la presencia de hierro (III ocupando posiciones en la capa octaédrica del mineral de arcilla y formando nanoclusters, posiblemente de óxidos u oxihidróxidos. El análisis textural indica que el material es predominantemente mesoporoso.

  3. USO DE BENTONITA EN AGUAS RESIDUALES DE CURTIEMBRES PARA LA REMOCIÓN DE Cr(III

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    Adriana Echavarria Isáza

    2010-10-01

    Full Text Available Se reporta un procedimiento eficiente para la remoción de Cr(lll de las aguas residuales de curtiembres utilizando bentonita natural y químicamente tratada. El mejor resultado se obtiene utilizando 7.5 gramos de bentonita natural para un volumen de efluente residual de 20 mi. Este sólido removió la totalidad del cromo(III presente en la muestra.

  4. Uso de bentonita en aguas residuales de curtiembres para la remoción de cr(iii)

    OpenAIRE

    Echavarria Isáza, Adriana; Moreno Casafús, Mónica; Rámirez Ochoa, Claudia; Tamayo Martinez, Claudia; Saldarriaga Molina, Carlos

    2010-01-01

    Se reporta un procedimiento eficiente para la remoción de Cr(lll) de las aguas residuales de curtiembres utilizando bentonita natural y químicamente tratada. El mejor resultado se obtiene utilizando 7.5 gramos de bentonita natural para un volumen de efluente residual de 20 mi. Este sólido removió la totalidad del cromo(III) presente en la muestra.

  5. ECUACIÓN DE VELOCIDAD PARA LA ADSORCIÓN SOBRE UNA BENTONITA.

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    David Rodríguez

    2008-03-01

    Full Text Available Se estudió la adsorción de dodecilbencenosulfonato de sodio, a 25 oC, sobre arcillas organofílicas obtenidas tratando una bentonita del Valle del Cauca con iones hexadeciltrimetil amonio y hexadecilbencildimetil amonio. El proceso de adsorción es relativamente rápido. Igualmente, se estudió la adsorción de cadmio, niquel y zinc sobre la bentonita en estado natural y se encontró que este proceso es muy rápido. En todos los casos estudiados se cumple la ley cinética correspondiente al proceso reversible y a la ecuación de velocidad que incluye la superficie de adsorbente disponible para la adsorción y en la que todos los órdenes parciales son iguales a uno.

  6. Volcanic Evolution in the Galapagos: The Geochemistry and Petrology of Espanola Island

    Science.gov (United States)

    McGuire, M.; Varga, K. C.; Harpp, K. S.; Geist, D.; Hall, M. L.

    2015-12-01

    The Galapagos Archipelago consists of a series of volcanic islands located ~1,000 km west of South America that are thought to be the result of a mantle plume. The southeasternmost island, Espanola, is one of the smallest of the major islands, measuring only 7 by 14 km and reaching an elevation of 200 m. Espanola is also the oldest island in the chain, with K-Ar dates from 3.01 ± 0.11 to 3.31 ± 0.36 million years (Hall et al. 1983; White et al., 1993). The southern coast is defined by cliffs that exceed 100 m in height, made up of nearly flat-lying lavas that are each several meters thick. The northern coastline consists of lavas that dip gently toward the ocean from the highlands, as well as remnants of eroded cinder cones. Paleomagnetic measurements made in the field indicate that the western half of the island is reversely polarized, whereas most lavas measured across the eastern half are normally polarized. Major element analyses of samples from across the island indicate that fractional crystallization is the dominant process controlling chemical variations in Espanola lavas, suggesting a relatively long-lived magmatic plumbing system. Stratigraphically constrained chemical variations suggest the magma chamber may have experienced periodic replenishment by compositionally homogeneous primitive melts. Variable fluid-mobile trace element concentrations provide some evidence for contributions from ancient, recycled oceanic crust to the parental melts. Espanola lavas have more depleted Sr and Pb radiogenic isotope ratios than either Floreana or Fernandina, and lie on a mixing curve between the composition of the plume and that of the depleted upper mantle. Between ~3 and 8 Ma, the Galapagos Spreading Center was closer to the Galapagos plume than it is today. Given that Espanola was constructed during the same period, the depleted isotopic signatures suggest that plume-ridge interaction may have been a strong influence on the island's geochemical composition.

  7. Superficie específica de una bentonita mediante la adsorción de azul de metileno

    OpenAIRE

    Pinzón Bello, Jorge Alejo

    2010-01-01

    Se estudió la determinación de la superficie específica de una bentonita colombiana, procedente del Valle del Cauca, mediante la adsorción de azul de metileno, a 298 K. Este método se comparó con el de la adsorción de nitrógeno a 77 K.

  8. Avaliação de bentonita sódica purificada e bentonita sódica intercalada como promotores de dissolução de clorpropamida em comprimidos preparados por granulação úmida e compressão direta

    OpenAIRE

    L. M. LIRA; C. B. DORNELAS; L. M. CABRAL

    2009-01-01

    O presente estudo avaliou sistemas baseados em bentonita sódica purificada e bentonita sódica purificada intercalada com colina como promotores de dissolução de clorpropamida. A intercalação da bentonita sódica foi avaliada por difração de raios X, análise termogravimétrica, análise calorimétrica de varredura e espectrometria no infravermelho. Prepararam-se misturas ...

  9. Caracterización y propiedades de las bentonitas de Amotape (Región Grau-Perú)

    OpenAIRE

    Vega Farfán, José Luis; Verdeja González, Luis Felipe; Sancho Martínez, José Pedro; García Iglesias, Jesús José María

    1993-01-01

    Las bentonitas son uno de los recursos minerales no metálicos más abundantes en la Región Grau (Perú). En el presente trabajo se evalúan en forma sistemática las características físico-químicas y mineralógicas del mineral procedente de cinco yacimientos de la zona de Amotape, cuyas reservas estimadas en una primera evaluación ascienden a L7 millones de TM. Los resultados de los análisis químicos y mineralógicos, nos determinan que las bentonitas son del tipo Wyoming. Las posibles aplicaciones...

  10. Superficie específica de una bentonita mediante la adsorción de azul de metileno

    Directory of Open Access Journals (Sweden)

    Jorge Alejo Pinzón Bello

    2010-07-01

    Full Text Available Se estudió la determinación de la superficie específica de una bentonita colombiana, procedente del Valle del Cauca, mediante la adsorción de azul de metileno, a 298 K. Este método se comparó con el de la adsorción de nitrógeno a 77 K.

  11. Three-dimensional geologic model of the southeastern Espanola Basin, Santa Fe County, New Mexico

    Science.gov (United States)

    Pantea, Michael P.; Hudson, Mark R.; Grauch, V.J.S.; Minor, Scott A.

    2011-01-01

    This multimedia model and report show and describe digital three-dimensional faulted surfaces and volumes of lithologic units that confine and constrain the basin-fill aquifers within the Espanola Basin of north-central New Mexico. These aquifers are the primary groundwater resource for the cities of Santa Fe and Espanola, six Pueblo nations, and the surrounding areas. The model presented in this report is a synthesis of geologic information that includes (1) aeromagnetic and gravity data and seismic cross sections; (2) lithologic descriptions, interpretations, and geophysical logs from selected drill holes; (3) geologic maps, geologic cross sections, and interpretations; and (4) mapped faults and interpreted faults from geophysical data. Modeled faults individually or collectively affect the continuity of the rocks that contain the basin aquifers; they also help define the form of this rift basin. Structure, trend, and dip data not previously published were added; these structures are derived from interpretations of geophysical information and recent field observations. Where possible, data were compared and validated and reflect the complex relations of structures in this part of the Rio Grande rift. This interactive geologic framework model can be used as a tool to visually explore and study geologic structures within the Espanola Basin, to show the connectivity of geologic units of high and low permeability between and across faults, and to show approximate dips of the lithologic units. The viewing software can be used to display other data and information, such as drill-hole data, within this geologic framework model in three-dimensional space.

  12. Avaliação de bentonita sódica purificada e bentonita sódica intercalada como promotores de dissolução de clorpropamida em comprimidos preparados por granulação úmida e compressão direta

    Directory of Open Access Journals (Sweden)

    L. M. LIRA

    2009-02-01

    Full Text Available

    O presente estudo avaliou sistemas baseados em bentonita sódica purificada e bentonita sódica purificada intercalada com colina como promotores de dissolução de clorpropamida. A intercalação da bentonita sódica foi avaliada por difração de raios X, análise termogravimétrica, análise calorimétrica de varredura e espectrometria no infravermelho. Prepararam-se misturas físicas, empastamentos (kneadings e granulados e comprimidos, por granulação úmida e compressão direta; ambos os sistemas (físicos e comprimidos com diversas relações fármaco:promotores de dissolução. Todos os sistemas físicos e os comprimidos foram avaliados quanto à dissolução do fármaco segundo metodologia descrita na Farmacopéia Norte-Americana (USP. Os comprimidos ainda foram avaliados quanto à dureza e friabilidade. O empastamento hidroalcoólico mostrou ser o melhor sistema físico para aumento da dissolução, entretanto é inviável para produção industrial de comprimidos. Os comprimidos de clorpropamida preparados por granulação úmida com proporção de fármaco e promotores de dissolução de 1:0,25 p/p apresentaram melhores resultados no teste de dissolução em relação aos comprimidos sem os promotores. Não houve diferença significativa entre a liberação de clorpropamida com a bentonita sódica e bentonita sódica intercalada. Os comprimidos preparados por compressão direta apresentaram, comparativamente, o melhor desempenho no teste de dissolução. Não foi evidenciado perda de cristalinidade do fármaco nos sistemas estudados. O poder de desintegração da bentonita e a possível interação molecular entre o fármaco e a bentonita são as prováveis causas do aumento da dissolução da clorpropamida com tais sistemas baseados em bentonita. Palavras-chave: bentonita sódica; solubilidade; promotores de

  13. Retention of chromium by modified Al-Bentonite Retenção de cromo por Al-bentonita modificada

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    C. Volzone

    2002-09-01

    Full Text Available Retention of chromium (III from a tanning wastewater by modified Al-bentonites was studied. One bentonite from San Juan province, Argentina, was used. Al-bentonite was prepared by contact of bentonite with hydrolyzed OH-Al solutions (0.10 M in Al for 24 hours. The modified Al-bentonites were obtained by: a treatment with 0.5 M sodium chloride; b with 0.5 M sodium chloride adjusted at pH 8; and c treatment with an hexametaphosphate solution after sodium addition. Then, the samples were dried at 100 °C and heated at 500 °C. The chromium (III retention by samples was carried out in batch system putting in contact the material with a 2000 ppm Cr tannery waste at different times. The retained chromium was characterized by analyzing the supernatant using UV-visible spectroscopy. The different chromium retention was correlated with structural characteristics of the solids.Foi estudada a retenção de cromo (III de águas residuais por meio de Al-bentonitas modificadas. Foi usada uma bentonita da província de San Juan, Argentina. As bentonitas-Al forma preparadas colocando-as em contato com soluções (0,10 M Al hydrolizadas de OH-Al durante 24 horas. As bentonitas-Al modidicadas foram obtidas por meio de: a tratamento com cloreto de sódio 0,5 M; b com cloreto de sódio 0,5 M sodium com pH ajustado para 8; e c tratamento com uma solução de hexametafosfato após a adição de sódio. As amostras foram então secas a 100 °C e aquecidas a 500 °C. A retenção do cromo (III pelas amostras foi feita em lotes colocando o material em contato em diferentes tempos com um resíduo contendo 2000 ppm de cromo. O cromo retido foi caracterizado por meio de análise do sobrenadante usando espectroscopia UV-visível. As diferentes retenções de cromo foram correlacionadas com características estruturais dos sólidos.

  14. Efecto del pH en la adsorción de cadmio, niquel y zinc sobre una bentonita

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    Liz Adriana Pinilla Cuenca

    2010-09-01

    Full Text Available Se estudió el efecto del pH sobre la adsorción de cadmio, niquel y zinc, en solución acuosa a 25°C, sobre una bentonita colombiana proveniente del Valle del Cauca. Los datos experimentales se analizaron con base en las isotermas de adsorción, la constante termodinámica de reparto KDM (calculada mediante la isoterma de Langmuir, la relación de distribución Rd (obtenida del modelo Baeyens-Bradbury y una gráfica Kurbatov.

  15. Desenvolvimento de recobrimento retardante de chama em tecido de algodão utilizando bentonita sódica

    OpenAIRE

    Zottis, Ricardo

    2012-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Química Os acabamentos retardantes de chama são substâncias aplicadas nos substratos têxteis com intuito de dificultar a ignição e tornar demorada a propagação da chama, reduzindo os riscos de incêndios. Neste trabalho foi investigada a incorporação de argila no tratamento retardante de chama em tecido de algodão utilizando bentonita sódica juntamente com aditivos fo...

  16. Estudio de la adsorción de cadmio, níquel y zinc sobre una bentonita natural y homoiónica de sodio

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    Germán Darío Silva Giraldo

    2010-09-01

    Full Text Available Se esmdió la adsorción de cadmio, níquel y zinc, en solución acuosa a 25 "C, sobre una bentonita procedente del Valle del Cauca, tanto en su estado natural como en su forma homoiónica de sodio.

  17. Curvas de titulación potencio métrica ácido-base de una bentonita

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    Liz Adriana Pinilla Cuenca

    2011-03-01

    Full Text Available Se estudió el comportamiento acido- base de una bentonita colombiana proveniente del Valle del Cauca, medianteexperimentos de titulación potenciométrica. Se escogió el método de titulación por retroceso, ya que la técnica de titulación continua no produce una curva única de valoración.La curva de titulación muestra tres puntos de inflexión, establecidos mediante los máximos en la curva derivada, envalores de pH de 4,8; 6,2 y 6,8, que indican tres tipos de sitios ácidos, identificados con los mecanismos de intercambioiónico presentes en la bentonita. El primer sitio ácido, y el más fuerte, se manifiesta como un mecanismo de sustitución de los iones interlaminares, de la estructura 2: 1, por iones H +. El segundo y el tercero son consecuencia de sitios de enlaces rotos o defectos de la red cristalina localizados en bordes y aristas, que originan sitios de acomplejamientosuperficial de dos tipos: silanol (=SiOH y aluminol (=A10H

  18. EFECTO DEL pH EN LA ADSORCIÓN DE CADMIO, NÍQUEL Y ZINC SOBRE UNA BENTONITA

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    Liz Adriana Pinilla Cuesta

    2010-11-01

    Full Text Available Se estudió el efecto del pH sobre la adsorción de cadmio, niquel y zinc, en solución acuosa a 25"C, sobre una bentonita colombiana proveniente del Valle del Cauca. Los datos experimentales se analizaron con base en las isotermas de adsorción, la constante termodinámica de reparto Kdm (calculada mediante la isoterma de Langmuir, la relación de distribución Rd (obtenida del modelo Baeyens-Bradbury y una gráfica Kurbatov. La adsorción de cadmio, niquel y zinc aumenta con el pH. El orden de adsorción encontrado: Cd > Ni≅Zn coincide con el establecido por el principio HSAB.

  19. Gender analysis of papers published in ACTAS ESPANOLAS DE PSIQUIATRIA (1999-2006).

    Science.gov (United States)

    Alonso-Arroyo, A; González-Alcaide, G; Bolaños Pizarro, M; Castelló Cogollos, L; Valderrama-Zurián, J C; Aleixandre-Benavent, R

    2008-01-01

    The governments and organizations responsible for scientific policies try to encourage equality of gender, among their priorities that of obtaining equal participation and full integration of women in all aspects of the scientific profession. The study analyzes the scientific production of women in the areas of Psychiatry by means of the bibliometric study of the papers published in ACTAS ESPANOLAS DE PSIQUIATRIA. A total of 458 papers published from 1999- 2006 period were downloaded from the Science Citation Index-Expanded database, these including original research papers, review articles and clinical cases. A bibliometric study broken down by gender was carried out to determine the existence or inequalities between men and women regarding scientific productivity, type of document, order of author signatures, on the institutional and geographical level. The papers were published by 1,194 different authors. The gender of 977 authors was identified, 587 (60.08%) men and 390 (39.92%) women. The percentage of women authorship has risen from 29.92% in 1999 to 38.86% in 2006. A total of 42.92% of authors having one published article were women, while (those with more than nine articles) only accounted for 33%. Bibliometric studies on scientific activity provide essential information to promote gender equality. An annual increase over 1% in the number of female authors in the journal has been observed, which if it continues will lead to a parity in coming years.

  20. Hidro conversión de heptano sobre una bentonita colombiana y una saponita española pilarizadas con aluminio y activadas con ácido

    Directory of Open Access Journals (Sweden)

    Manuel Fredy Molina C.

    2011-03-01

    Full Text Available El presente trabajo estudia una arcilla tipo esmectita, una bentonita colombiana, la cual fue sometida a modificación por pilarización con especies de aluminio, y a modificación por tratamiento con ácido clorhídrico de diferentes concentraciones. Igualmente, se empleó una saponita española modificada por pilarización con Al y tratada con ácido clorhídrico de diferentes concentraciones, con el objetode establecer un paralelo entre los dos tipos de arcillas en su comportamiento frente a las modificaciones estudiadas.Los sólidos fueron caracterizados por técnicas convencionales, tales como análisis químico, capacidad de intercambio catiónico, difracción de rayos X, acidez total y análisis de textura. Los resultados indican que los dos tipos dearcilla fueron igualmente pilarizados con Al, independientemente del origen de la esmectita de partida.Los resultados catalíticos en la hidroconversión de heptano, obtenidos sobre catalizadores bifuncionales (arcilla modificada impregnada con Pt revelan que la AlP-saponita es más eficiente en la isomerización que la AIP-bentonita. Esta mayor eficiencia es atribuida a la presencia de sitios ácidos fuertes tipo Si-OH ... Al, los cuales están presentes únicamente en las esmectitas, donde las sustituciones isomórficas están localizadas en las láminas tetraédricas. En montmorillonitas (bentonita, estas sustituciones se encuentran presentes en las láminas octaédricas, de manera que este tipo de sitios ácidos son reducidos o simplemente están ausentes.

  1. Mobilidade do zinco e do cobre em Argissolo com aplicação de argila bentonita Zinc and copper mobility in Argisol with application of bentonite clay

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    Gilvanise A. Tito

    2012-09-01

    Full Text Available A mobilidade dos metais pesados no solo é influenciada pelas características do solo, pela mineralogia das argilas e pelo teor do metal. Objetivando avaliar o efeito da bentonita na mobilidade do zinco e do cobre no solo, colunas de lixiviação preenchidas com um Argissolo foram submetidas a ensaios de mobilidade utilizando-se doses de bentonita (0, 30 e 60 t ha-1 e concentrações de zinco e cobre, de 50, 250 e 450 mg kg-1. As colunas de solo foram mantidas saturadas e sob fluxo de água permanente; em seguida foram determinados densidade, velocidade do fluxo, fator de retardamento, coeficiente de dispersão-difusão e número de Peclet. Os parâmetros de transporte foram definidos através do modelo computacional DISP. A incorporação de bentonita ao solo promoveu a retenção do zinco e do cobre pelo solo, principalmente deste último, diminuindo a concentração em solução lixiviada e os riscos de contaminação do meio ambiente. A aplicação de bentonita aumentou o fator de retardamento, mas reduziu o coeficiente de dispersão-difusão do solo.The mobility of heavy metals in the soil is influenced by the soil, the clay mineralogy and the amount of metal. Aiming to evaluate the effect of bentonite clay on zinc and copper mobility, leaching columns of soil, filled with an Argisol, utilising increasing doses of bentonite (0, 30 e 60 t ha-1 and concentrations of zinc and copper (50, 250 e 450 mg kg-1 were submitted to a saturated and steady flow. The flux density, velocity, transport retardation factor, dispersion-diffusion coefficient and breakthrough curves were obtained. The transport parameters were determined using the DISP computational model. The results allow to conclude that the application of bentonite clay to the soil promoted the retention of the zinc and copper, mainly the last one, decreasing the concentration in leachate and reducing potential contamination risks. The bentonite clay application increased the soil

  2. Variabilidad textural, mineralógica y geoquímica de la bentonita de Yuncos (Cuenca de Madrid

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    Moreno, A.

    1993-12-01

    processes (Al/Mg > 0.3 and the other to neoformation (Al/Mg En este trabajo se estudia la variabilidad composicional (mineralógica y geoquímica y textural de la capa principal de bentonita (saponita del depósito de Yuncos (Toledo, en el sector suroccidental de la cuenca de Madrid. Desde un punto de vista sedimentológico se han diferenciado en la capa bentonítica dos episodios: uno inferior (1 caracterizado por litofacies de lutitas masivas, que muestran lateralmente microfacies brechoides-bioturbadas (columna A a intraclásticas con «glébulas» y materia orgánica (columnas B y C, y otro episodio superior (11 constituido por lutitas laminadas-Iajeadas con ooides calcíticos, que muestra un escaso desarrollo en las columnas estudiadas. El primer episodio se interpreta como depósitos de encharcamiento palustre somero sobre facies de «mud-flat» lacustre, y el segundo como correspondiente a depósitos en pequeños encharcamientos rellenando depresiones sobre la bentonita del episodio inferior que es parcialmente removilizada. De los datos texturales se infiere que la columna A corresponde a la zona con mayor grado de somerización, mientras que la C es la que presenta rasgos de un mayor período de encharcamiento, siendo la B transicional entre ambas. Mineralógicamente se observa una disminución progresiva en el contenido de minerales heredados (cuarzo, feldespatos, illita-mica en la dirección A-C, que coincide con un incremento en la proporción de fracción arcilla en las granulometrías. La arcilla está constituida fundamentalmente por saponita, con illita abundante en la columna A y sepiolita mejor desarrollada en la zona transicional (columna B. Estas características se reflejan en el comportamiento geoquímico, con A12O3, K2O, Fe2O3, Na2O y TiO2 decreciendo en la dirección A-C (correlación positiva, mientras que MgO es su antagonista (correlación negativa. Los elementos traza, especialmente Ba, Nb, Pb

  3. Quality assurance programme in mammography of the Sociedad Espanola de Diagnosticos por Imagen de la Mama (SEDIM)

    International Nuclear Information System (INIS)

    Fernandez, B.; Gonzalez, C.; Hernando, I.; Iribar, M.; Lopez, J.A.; Salvador, R.; Vega, A.; Vizcaino

    2001-01-01

    The European Union Council Directive 97/43/Euratom of 30 June 1997 on health protection of individuals against the dangers of ionizing radiation in relation to medical exposure has been partially transposed to the Spanish national law by the Real Decreto 1976/1999, which establishes the quality criteria in Diagnostic Radiology. A key instrument in this legal regulation is the so-called Quality Assurance Program (QAP) which has to be implemented in each Diagnostic Radiology unit. The Spanish Breast Imaging Diagnostic Society (Sociedad Espanola de Diagnostico por Imagen de la Mama, SEDIM) has proposed a reference QAP to be used as a guide in all the mammography units in the country. Its main issues are displayed in the present paper. The SEDIM QAP includes some items related to justification and optimization of mammography exams as well as a proposal for the assignment of functions and responsibilities. A guide for the image and technical parameters quality evaluation is also included. Some keys on equipment acquisition, maintenance and on continuing education and information management can also be found in that document. (author)

  4. History of Spanish Selection of the International Solar Energy; Historia de la Asociacion Espanola de Energia solar

    Energy Technology Data Exchange (ETDEWEB)

    Vazquez, M.

    2004-07-01

    This paper is about the old and new Spanish Sections of the International Solar Energy Society (ISES). The old Section was formed on the initiative of the Spanish Association Atecyr and was named ISES Espana. As a legal Spanish association, it developed its activities from 1981 until 1991 when economic difficulties made ISES suspend the Section. In that year Prof. Manuel Vazquez, director of the Laboratory of Solar Energy of the University of Vigo, became interested in the subject and participated in his restlessness to other Spanish members of ISES. All of them agreed to create a new Spanish association under the name of Asociacion Espanola de Energia Solar (AEDES), which was registered as an ONG in the Spanish National Register of Associations and ratified by ISES as its Spanish Section in 1993. In this paper the significant data of the old and new sections are given, including the names of representative people and members of the Board and the development of the membership. (Author)

  5. Cadmium and copper adsorption on bentonite: effects of pH and particle size Adsorção de cádmio e cobre em bentonita: efeito do pH e da granulometria

    Directory of Open Access Journals (Sweden)

    Lúcia Helena Garófalo Chaves

    2011-06-01

    Full Text Available Reactions of heavy metals with clay minerals are important in determining metal fates in the environment. However, the adsorption process of these metals by the bentonite has been extensively investigated. The objectives of this work were to assess the ability of bentonite clay to adsorb cadmium and copper and to study the effects of pH and particle size upon these metals adsorption. Adsorption isotherms were obtained from batch adsorption experiments, with increasing cadmium and copper concentrations (5-200 mg L-1. To find out the effects of pH and particle size on adsorption, the experiments were conducted at pH 4; 5 and 6 using particles sizes of As reações dos metais pesados com os minerais de argila são importantes para determinar o destino dos mesmos no meio ambiente. Assim, o processo de adsorção destes metais pela bentonita tem sido muito investigado. Objetivou-se com este trabalho avaliar a capacidade da argila bentonita em adsorver cádmio e cobre e os efeitos do pH e de sua granulometria na adsorção dos mesmos. A partir de experimentos tipo "batch", foram elaboradas isotermas de adsorção com quantidades crescentes de Cd e Cu (5-200 mg L-1. Para determinar o efeito do pH e da granulometria sobre a adsorção, os experimentos foram conduzidos a pH 4; 5 e 6, utilizando bentonita com granulometria < 0,5 mm e entre 0,5 a 2,0 mm. As quantidades de Cd e Cu adsorvidas pela bentonita foram determinadas pela diferença entre as concentrações inicial e final dos elementos na solução de equilíbrio. A bentonita adsorveu mais Cu do que Cd, entretanto a adsorção dos dois metais aumentaram com o aumento do pH independentemente da granulometria. Nenhum efeito da granulometria sobre a adsorção foi observada. Os dados experimentais foram bem ajustados ao modelo de Langmuir. A capacidade máxima de adsorção diminuiu e a energia de ligação aumentou em função do aumento do pH.

  6. Caracterización de bentonitas y zeolitas sin tratamiento como refuerzo en materiales compuestos de matriz polimérica//Characterization of untreated zeolites and bentonites as reinforcement in polymer matrix composites

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    Francisco Jesús Mondelo‐García

    2014-01-01

    Full Text Available Las bentonitas con microestructuras compuestas de placas silicio aluminosas. Se logró el objetivo de caracterizar las bentonitas sódicas de Wyoming, USA, Patagonia de Argentina, nordeste de Brasil, así como las bentonitas policatiónicas de Brasil, la cálcica activada con sodio y zeolita de Cuba no organofilizadas para emplearlas como refuerzo en materiales compuestos de matriz polimérica. Estosmateriales se evaluaron usando técnicas físico-químicas como fluorescencia de rayos X, difracción de rayos X, microscopia electrónica de barrido, humedad, capacidad de intercambio catiónico, absorción e hinchabilidad en diluyente acuoso. Los resultados confirmaron rangos variables de intercambio catiónico,hinchamiento y absorciòn en agua entre las bentonitas analizadas, debido a su naturaleza química estructural en hidratación, logrando mayores valores las sódicas, luego la cálcica activada y con menor valor las policatiónicas, pero permiten usarlas como carga en polímeros.Palabras claves: bentonita, zeolita, matriz polimérica, organofilizada, materiales compuestos._____________________________________________________________________________AbstractBentonites with aluminous silicon microstructure composed of plates. The work accomplished to characterize the sodium bentonites in Wyoming USA, Patagonia Argentina, Northeast Brazil and the Brazilian polycationic bentonites, calcium-activated sodium zeolite from Cuba without organic modificationnot organophilized to employ as reinforcing in composite materials of polymer matrix. These materials were evaluated for physical and chemical assay techniques such as X-ray fluorescence, X-ray diffraction, scanning electron microscopy, moisture, cation exchange capacity, absorption and swelling aqueousdiluent. The results confirmed variables ranges of cationic exchange, swelling and water absorption from the bentonites tested, due to its chemical-structural hydration, achieving higher values nature

  7. Adição de bentonita sódica como adsorvente de aflatoxinas em rações de frangos de corte Utilization of sodium bentonite as adsorbent of aflatoxins in broiler feed

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    Juarez Morbini Lopes

    2006-10-01

    Full Text Available A presença de micotoxinas nas matérias-primas, principalmente no milho utilizado para rações para aves, é uma das maiores preocupações atuais devido aos danos causados por essa substâmcia não só aos animais, mas também aos produtores e às empresas do setor avícola. Considerando a utilização de adsorvente ou seqüestrante na ração para minimizar os efeitos deletérios, realizou-se um experimento para avaliar o efeito da adição de um adsorvente, baseado em bentonita sódica, na ração de frangos de corte, a fim de reduzir os efeitos de aflatoxinas. Foram utilizados 960 pintos Cobb de um dia de idade, distribuídos em oito repetições de 20 animais nos tratamentos: T1=sem aflatoxina;T2=3mg kg-1 de aflatoxina;T3=sem aflatoxina+0,5% de bentonita; T4=3mg kg-1 de aflatoxina+0,1% de bentonita; T5=3mg kg-1 de aflatoxina+0,3% de bentonita e T6=3mg kg-1 de aflatoxina+0,5% de bentonita. O consumo alimentar, o peso corporal e a conversão alimentar foram afetados pela presença da toxina na ração. A adição de bentonita sódica na ração sem aflatoxina não causou nenhum efeito depressivo nas aves. Nos tratamentos que continham 3mg kg-1 de aflatoxinas, a adição do adsorvente promoveu um melhor desempenho das aves, sendo que 0,3% de adição de bentonita apresentou melhores resultados.High concentrations of micotoxins in raw materials, mainly in corn used in poultry rations of food, is an important subject of study due to hazardous problems not only to the animals themselves but also to the producer and to the poultry industry due to the reduction of performance by aflatoxins. Taking into account the lack of efficient tecnique for its elimination, from the feed, an adsorbent was added to the diets in order to reduce the effects of aflatoxins. Nine hundred sixty day old Cobb chicks, distributed in 8 replicates of 20 birds per pen the following treatments: T1=No aflatoxin; T2=3mg kg-1 of aflatoxin; T3=no aflatoxin+0.5% of bentonite; T

  8. SINTESIS Y CARACTERIZACIÓN DE BENTONITA MODIFICADA CON ESPECIES DE TiO2 y Fe-TiO2 OBTENIDAS DEL MINERAL ILMENITA

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    Juan Torres

    2014-07-01

    Full Text Available Se sintetizó una serie de sólidos nanoestructurados, obtenidos por la intercalación de nanopartículas de TiO2 y Fe-TiO2 en los espacios interlaminares de un mineral de arcilla esmectítico. Los nuevos materiales se prepararon mediante la modificación simultánea de dos minerales naturales: una bentonita y una ilmenita. Los materiales obtenidos se caracterizaron por fluorescencia de rayos X (FRX, espectroscopía infrarroja (IR, difracción de rayos X (DRX, microscopía electrónica de barrido (SEM y sortometría de nitrógeno. Los resultados del análisis químico (FRX confirmaron claramente la incorporación de titanio y de hierro en los materiales sintetizados. Los análisis por DRX, SEM y sortometría de nitrógeno verificaron la modificación del mineral de arcilla por incorporación de especies de dióxido de titanio, demostrando la generación de estructuras mesoporosas delaminadas o exfoliadas con incremento en los valores de área superficial y porosidad controlada.

  9. Estudo do comportamento hidráulico de mistura solo-bentonita visando alternativa de emprego como sistema de proteção para aterros sanitários

    OpenAIRE

    Christopher Fonseca da Silva

    2015-01-01

    Este trabalho apresenta um estudo sobre a influência do acréscimo de 4% de bentonita sódica, da anisotropia inerente, produzida pela compactação, e do estado de tensões no comportamento hidráulico de um solo areno-argiloso encontrado na região Costeira Sul do estado do Rio Grande do Sul. Neste estudo, busca-se não somente viabilizar o emprego do referido solo como barreira mineral em obras de proteção ambiental, mas também verificar seu desempenho, quando misturado ao aditivo, perante as cond...

  10. Estudo de suspensões de bentonitas sob diferentes condições térmicas Study of bentonit suspensions under different thermal conditions

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    C. A. Leal

    2013-03-01

    Full Text Available Suspensões argilosas são utilizadas como fluidos de perfuração de poços nas primeiras camadas rochosas, geralmente constituídas por sedimentos inconsolidados. Em camadas mais profundas são comumente utilizados fluidos base óleo devido sua resistência térmica. No entanto, em virtude das leis ambientais estes fluidos estão sendo substituídos e as suspensões argilosas surgem como uma alternativa pelo caráter ambientalmente correto e menor custo. Assim, torna-se de extrema importância o estudo das propriedades de suspensões argilosas a temperaturas moderadas e elevadas. Desta forma, este trabalho tem por objetivo avaliar as propriedades das suspensões argilosas de bentonita sob diferentes condições térmicas. Para tanto, foi empregado um planejamento fatorial do tipo 2² com três experimentos no ponto central + configuração estrela, totalizando 11 corridas experimentais para avaliar a influência da temperatura e do teor de argila (variáveis de entrada sobre as propriedades reológicas e de filtração das suspensões argilosas. As suspensões foram preparadas com concentração de bentonita variando de 8,75 g/350 mL a 22,4 g/350 mL e submetidas a temperaturas entre 38 °C e 176 °C durante 16 h. Foram estudados dois tipos de envelhecimento térmico, dinâmico e estático, em equipamento Roller Oven da Fann. As propriedades reológicas (viscosidades aparente - VA e plástica - VP foram determinadas em viscosímetro Fann 35A e o volume de filtrado (VF em filtro-prensa API. Concluiu-se que as variáveis de entrada influenciam estatisticamente, ao nível de 95% de confiança, as propriedades das dispersões, sendo observado que a combinação de temperaturas elevadas e altas concentrações de argila conduz a maiores valores de VA e VP, bem como que os maiores valores de VF foram obtidos com as suspensões preparadas com baixa concentração de argila e submetidas à elevada temperatura. Ficou evidenciado ainda que o tipo de

  11. Propriedades térmicas de compósitos de polipropileno e bentonita organofílica Thermal properties of polypropylene and organophilic bentonite

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    Elaine V. D. G. Líbano

    2012-01-01

    Full Text Available Uma argila bentonita policatiônica nacional foi utilizada para a produção de uma argila organofílica, obtida a partir da síntese com o sal de amônio quaternário, cloreto de cetiltrimetilamônio. A argila tratada com o sal orgânico (BENT-org e a não tratada (BENT foram caracterizadas por espectroscopia de absorção no infravermelho (FTIR e difratometria de raios X (DRX. Posteriormente, as argilas foram misturadas com o polipropileno (PP pelo método de intercalação por fusão em uma extrusora dupla-rosca co-rotativa. Os compósitos foram caracterizados pelas técnicas de DRX, calorimetria diferencial de varredura (DSC e análise termogravimétrica (TGA. Os resultados de FTIR e DRX mostraram a presença dos grupos característicos do sal de amônio e a intercalação deste entre as camadas do argilomineral. As análises de DRX dos compósitos com 3 e 5% em massa de BENT-org evidenciaram a presença de picos deslocados para regiões de baixo ângulo, sugerindo a intercalação das cadeias do polímero entre as camadas da argila. Os resultados de DSC indicaram que a argila pode ter atuado como agente nucleante devido ao aumento na Tcc (temperatura de cristalização no resfriamento dos compósitos. De acordo com os resultados de TG, constatou-se que a incorporação da argila ao PP melhorou a estabilidade térmica do polímero nos compósitos com 5% em massa de BENT e 3 e 5% em massa de BENT-org.A Brazilian polycationic bentonite clay was used for producing an organophilic clay with the quaternary ammonium salt, cetyltrimethylammonium chloride. The salt treated clay (BENT-org and untreated clay (BENT were characterized by infrared spectroscopy (FTIR and X-ray diffraction (XRD. Then, each clay was mixed with polypropylene (PP by melt intercalation in a counter-rotating twin-screw extruder. The composites were characterized by XRD, differential scanning calorimetry (DSC and thermogravimetric analysis (TGA. The results from FTIR and XRD

  12. Uso de bentonita na remediação de solos contaminados com zinco: efeito na produção de feijão Use of bentonite in the remediation of soils contaminated with zinc: effect on bean production

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    Gilvanise A. Tito

    2011-09-01

    Full Text Available Diversos procedimentos têm sido propostos para reduzir a concentração de metais pesados nos solos, e, conseqüentemente, seus efeitos poluidores. Dentre eles destacam-se a aplicação de materiais, como a bentonita, capazes de adsorver estes elementos, tornando-os menos disponíveis para as plantas. Objetivou-se com este trabalho avaliar a capacidade da bentonita na remediação de solos contaminados com zinco. Conduziu-se experimento em condições de casa de vegetação com delineamento inteiramente casualizado com três repetições e uma planta por parcela, utilizando-se como planta indicadora o feijão caupi (Vigna unguiculata L.. Os tratamentos consistiram de uma combinação fatorial 3 x 3, sendo o primeiro fator composto por três doses de Zn (50, 250 e 450 mg kg-1 e o segundo fator por três doses de bentonita (0, 30 e 60 t ha-1. Para o estudo, utilizou-se vasos com capacidade de18 kg, preenchidos com 15 kg de solo em mistura com as respectivas doses de bentonita e com o zinco. Os tratamentos permaneceram incubados por um período de 10 dias, e em seguida foi realizada a semeadura da planta indicadora. Aos 65 dias após a semeadura colheram-se folhas, caules, raízes, sementes e casca, que, depois de secos em estufa de circulação de ar (65°C, foram pesados, moídos e analisados quanto aos teores de zinco. Os resultados evidenciaram que a bentonita parece ser um excelente material inorgânico para remediar solos contaminados com zinco. A incorporação de bentonita ao solo aumenta a adsorção do zinco diminuindo a disponibilidade deste elemento para a planta tendendo, consequentemente, aumentar a produção de massa seca.Several procedures have been proposed to reduce the concentration of heavy metals in soils and consequently, to reduce polluting effects. One of the most used procedures is the application of materials such as bentonite capable of adsorbing these elements making them less available to plants. The objective of this

  13. Caracterización física con difractogramas e hinchamiento de bentonitas organofílicas para adicionar a materiales compuestos poliméricos//Physical characterization with difractograms and swelling of organophilic bentonites to add to polymer composites

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    Francisco Jesús Mondelo‐García

    2014-05-01

    Full Text Available Las bentonitas con partículas de microestructura combinada por placas de tetraedros y octaedros silicio-aluminosos, contienen cavidades interlaminares entre ellas, confiriéndoles cualidades positivas para usarse en tintas, medicamentos, fluidos de perforación, retener desechos contaminantes residuales y como refuerzos de polímeros. Se logró el objetivo de hidratar y modificar orgánicamentecon sal cuaternaria orgánica del tipo cloruro hexadecil trimetil amonio y sal de sodio a bentonitas sódicas del Nordeste brasileño y la Patagonia argentina, policatiónicas brasileñas, cálcica activada y zeolita ambas cubanas, estableciendo una caracterización entre muestras no tratadas y organofilizadas. Estos materiales se evaluaron comparativamente por difracción de rayos X ehinchamiento Foster en diluyentes orgánicos. Los resultados confirmaron una variación significativa fisicoquímica y microestructural en los difractogramas de las bentonitas organofílicas, mientras las partículas micrométricas tomaron dimensiones nanométricas, se incrementó mucho más el hinchamiento en estas, mejorando su efectividad de empleo, al emplearlas como refuerzo,adicionado a una matriz polimérica.Palabras claves: bentonita, organofílica, zeolita, hinchamiento Foster, matriz polimérica.______________________________________________________________________________AbstractThe bentonites with microstructure particles combined by plates tetrahedral and octahedral siliconaluminous contain interlaminares cavities including, conferring positive qualities for use in inks, medicines, drilling fluids; retain polluting waste residuals and as polymer reinforcements. The objective to hydrate and organically modified with organic quaternary salt of hexadecyl trimethyl ammonium chloride type and sodium salt the sodium bentonites Northeast Brazilian and PatagoniaArgentina, Brazilian polycationics, calcium activated and zeolite both Cuban, establishing a characterization

  14. Influência dos cátions lítio (Li + , sódio (Na + e potássio (K + na reologia de bentonitas brasileiras para uso em fluidos de perfuração base aquosa

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    I. A. da Silva

    Full Text Available Resumo Os cátions lítio (Li+, sódio (Na+ e potássio (K+ encontram-se em primeiro lugar no plano de seletividade para a obtenção de bentonitas monocatiônicas a partir das policatiônicas, influenciando de forma específica o comportamento reológico dos fluidos de perfuração base água. O objetivo deste trabalho foi estudar a influência do Li+, Na+ e K+ na reologia de bentonitas do estado da Paraíba, Brasil, para uso em fluidos de perfuração à base de água. Os novos depósitos de bentonitas brasileiras foram comparados com base nas suas características químicas, físicas, mineralógicas, propriedades reológicas e de filtração. As amostras de bentonitas foram caracterizadas por meio da composição química através do método clássico, capacidade de troca de cátions, análise granulométrica por difração a laser, difração de raios X e análises térmicas. A reologia das dispersões foi estudada e determinadas as viscosidades aparente, viscosidade plástica e limite de escoamento com base nas normas da API e Petrobras, além dos estudos de inchamento em água e filtrado. Os resultados mostraram uma melhora significativa nas propriedades reológicas e de filtração das dispersões após a aditivação com os carbonatos de lítio e de sódio, nessa ordem, havendo presença de tixotropia nas curvas de fluxo das dispersões de argilas estudadas.

  15. Las buenas practicas espanolas 1998

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    Nasarre y de Goicoechea, Fernando

    2000-02-01

    Full Text Available The II HABITAT Conference held at Istanbul on June 1996, adopted the Habitat Program -Global Action Plan, in within which two performance lines are especially reinforced to reach the two main goals of suitable e housing for all and sustainable human settlements: the collaboration and participation among all the levels of the government and the civil society and, the recognition of the importance of the urban policies. In this framework is addressed the International Award Best Practices for the Improvement of the Life Conditions that, sponsored by the municipality of Dubai, is celebrated every two years and is awarded to the 10 selected by an International Independent Jury. The goal of the Competition is to promote policies and strategies more effective for the sustainable development of the humanity and their settlements, through the transmission of information and knowledge on experiences and solutions proved in the practice. The obtained results in the last international competition, with 32 of the presented Practices included in the Data Base of the United Nations Good Practices, 18 classified among the 100 best (3 of them included among the 40 finalists and finally, one, among the 10 awarded (Programs for the improvement of the urban environment of Malaga, allow us to look forward with satisfaction the panorama of the urban policy in our country.La Conferencia HABITAT II celebrada en Estambul en junio de 1996 adopto el Programa Hábitat-Plan Global de Acción-, dentro del cual se refuerzan especialmente dos líneas de actuación: la colaboración y participación entre todos los niveles de gobierno y la sociedad civil y el reconocimiento de la importancia de las políticas urbanas para alcanzar los dos objetivos principales: vivienda adecuada para todos y asentamientos humanos sostenibles. En este marco se inscribe el Concurso Internacional de Buenas Practicas para la Mejora de las Condiciones de Vida que, patrocinado par la municipalidad de Dubai, se celebra cada dos años y se concede a las 10 mejores actuaciones seleccionadas por un Jurado Internacional Independiente. EI objetivo del Concurso es promover políticas y estrategias mas efectivas para el desarrollo sostenible de la humanidad y de sus asentamientos mediante la transmisión de información y conocimientos sobre experiencias y soluciones comprobadas en la practica. Los resultad os obtenidos en el certamen internacional, con 32 de las Practicas presentadas incluidas en la Base de Datos sobre Buenas Practicas de Nación es Unidas, 18 clasificadas entre las 100 mejores (3 incluidas entre las 40 finalistasy una, finalmente, entre las 10 premiadas (Programas para la mejora del medio ambiente urbano de Málaga, permiten mirar con satisfacción el panorama de la política urbana en nuestro país.

  16. Desenvolvimento de nanocompósitos polipropileno/argila bentonita brasileira: I tratamento da argila e influência de compatibilizantes polares nas propriedades mecânicas Development of polypropylene/brazilian bentonite clay nanocomposites: I treatment of clay and the influence of the compatibilizers on the mechanical properties

    Directory of Open Access Journals (Sweden)

    André W. Rodrigues

    2007-09-01

    Full Text Available Os nanocompósitos de polipropileno/ bentonita e polipropileno/compatibilizante/bentonita foram preparados empregando uma extrusora dupla rosca acoplada a um Reômetro de Torque Haake. A argila bentonita natural proveniente do Município de Boa Vista - PB passou por um processo de purificação para em seguida ser aditivada com carbonato de sódio e posteriormente tratadas com o sal quaternário de amônia, visando a obter argila organofílica. As argilas foram caracterizadas por granulometria por difração de laser, análise química, espectroscopia de infravermelho e DR-X. Os resultados de granulometria e análise química mostraram que o processo de purificação foi eficiente em retirar as frações mais grosseiras mantendo as frações finas bem como na eliminação de minerais acessórios. Os resultados de FTIR e DR-X mostraram que o sal quaternário de amônio foi incorporado à argila confirmando a organofilização. Posteriormente a argila bentonita organofílica foi incorporada ao polipropileno (PP e PP/compatibilizante (PP-g-AA e PP-g-MA são polipropilenos enxertados com ácido acrílico e anidrido maleico, respectivamente. A formação dos nanocompósitos bem como as propriedades das misturas PP/ORG (ORG - argila organofílica e PP/compatibilizante/ORG foram verificadas por DR-X, MET e propriedades mecânicas. As análises de DR-X, MET mostraram que pode ter ocorrido a formação de nanocompósitos intercalado devido aos deslocamentos dos picos para ângulos de 2q inferiores. Os resultados das propriedades mecânicas mostraram que houve uma melhoria em algumas propriedades mecânicas.In this work, polypropylene/bentonite and polypropylene/compatibilizer/bentonite nanocomposites were prepared by the melt intercalation method, using a counter-rotating intermeshing twin-screw extruder attached to a Haake System 90 Rheometer. Initially the natural bentonite clay, from Boa Vista - PB, was subjected to a purification process and then

  17. Desenvolvimento de fluidos aquosos com bentonita para perfuração de poços de petróleo onshore Development of aqueous fluids with bentonite clay for drilling of onshore oil wells

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    R. C. A. M Nascimento

    2010-06-01

    Full Text Available Devido aos grandes desafios encontrados na perfuração de poços, há a necessidade de se desenvolver fluidos com propriedades adequadas e capazes de atender todas as exigências da perfuração, como elevada capacidade de carreamento de sólidos e alta lubricidade, como também fluidos ambientalmente corretos. O grau de impacto dos fluidos de perfuração no meio ambiente depende especialmente do tipo de fluido utilizado, se de base aquosa, oleosa, sintética ou mesmo de base ar. Portanto, é de fundamental importância o desenvolvimento de fluidos com características específicas em cada etapa da perfuração. Sendo assim, este trabalho objetivou o desenvolvimento de fluidos aquosos, com baixo teor de sólidos e propriedades reológicas, de filtração e lubricidade adequadas à perfuração de poços de petróleo onshore. Os fluidos foram formulados utilizando em sua composição bentonita sódica industrializada, aditivos poliméricos e lubrificantes, em diferentes concentrações. O estudo reológico, de filtração e lubricidade mostrou que os fluidos apresentam comportamento pseudoplástico e que os aditivos selecionados desempenham com êxito suas funções de modificadores reológicos, redutores de filtrado e agente lubrificante. Além disto, ficou evidenciada a necessidade de aditivos lubrificantes em fluidos aquosos contendo argila bentonítica e polímeros. A adição de 1% de lubrificante no fluido é suficiente para adequar a capacidade lubrificante dos fluidos.Due to challenges encountered in drilling wells, there is a need to develop fluids that have properties suitable and able to meet all the requirements of drilling, such as, high capacity for carrying of solid and high lubricity. Besides that, they need to be environmentally friend. The degree of impact of drilling fluids in the environment depends on the type of fluid used, if water or oil or synthetic or air based. It is therefore of fundamental importance to develop

  18. Radiological aspects of renal milk of calcium. Aspectos radiologicos de la lechada calcica renal

    Energy Technology Data Exchange (ETDEWEB)

    Perez Albelo, T.; Valles Gonzalez, H.; Torres Diaz, M.; Bonilla Arjona, A.; Baares Baudet, F. (Hospital Universitario de Canarias. La Laguna. Sta. Cruz de Tenerife (Spain))

    1993-01-01

    Renal milk of calcium is an uncommon condition consisting of the supension of innumerable microcalculi that occurs in the genitourinary tract in pyelogenic cysts, calyceal diverticuli and dilated collecting systems. Five cases, studied by means of radiography, ultrasonography and CT, are presented; the semiology of each of these explorations, all of which result in urine calcium levels that vary according to the position of the patients, is analyzed. All the cases reported here were associated with calyceal diverticuli. (Author)

  19. Caracterização e usos de argilas bentonitas e vermiculitas para adsorção de cobre (II em solução Characterization and uses of bentonite and vermiculite clays for adsorption of copper (II in solution

    Directory of Open Access Journals (Sweden)

    C. P. F. dos Santos

    2002-12-01

    Full Text Available Vários trabalhos tratam da remoção de metais por argilas e argilominerais. O processo de remoção geralmente ocorre por precipitação, troca iônica e adsorção. Neste trabalho estudou-se a adsorção de solução de Cu (II em vermiculita, bentonitas sódica e cálcica, proveniente de Campina Grande-PB , tendo-se como variáveis pH, tempo de contato e concentração do adsorvente. Os ensaios foram realizados à temperatura ambiente e as medidas de Absorção Atômica foram feitas no sobrenadante e no resíduo sólido. As argilas bentonitas cálcicas, provenientes de Campina-Grande (PB, sódica de Wyoming (Wyoming-USA e sódicas (preparadas em laboratório e as vermiculitas (provenientes do Piauí foram caracterizadas antes e após o processo de adsorção de Cu (II em solução através das técnicas, análise química, TG e DTA, área superficial (BET, espectroscopia na região de infravermelho, difração de raios X e medidas de pH. Os resultados mostram que as argilas estudadas adsorvem metais pesados através da troca iônica e que a vermiculita foi mais eficaz no processo, adsorvendo 40,9% de cobre da solução em estudo, em relação às outras argilas envolvidas no processo.Mineral clays have been extensively used for metal removal. The process involves precipitation, ion exchange and adsorption. The present investigation assessed the adsorption of Cu (II solution by natural vermiculite and both natural and synthetic bentonite. Tests were carried out at ambient temperature for the main parameters of the process, i.e., pH, contact time, and adsorbent content. Atomic absorption was also carried out both for the floater and solid residue. All raw materials used herein, i.e., sodic bentonite from Campina Grande-PB, sodic bentonite from Wyoming-USA, synthetic sodic bentonite and vermiculite from Piaui, were characterized both before and after adsorption of Cu (II solution by chemical analysis, TG, DTA, BET surface area, infrared

  20. Utilização do planejamento experimental no estudo do efeito da composição de misturas de bentonitas na reologia de fluidos de perfuração. Parte II: composições ternárias Experimental design applied to the study of composition effect of bentonite on the rheology of drilling fluids. Part II: ternary compositions

    Directory of Open Access Journals (Sweden)

    L. F. A. Campos

    2007-03-01

    Full Text Available O objetivo deste trabalho foi utilizar o planejamento experimental para avaliar o efeito da composição de misturas ternárias de bentonitas na reologia de fluidos de perfuração de poços de petróleo. Por meio do planejamento foram determinadas as proporções dos componentes nas misturas ternárias das argilas e então ajustados modelos de regressão relacionando viscosidade aparente, viscosidade plástica e volume de filtrado com a proporção de cada argila. A aplicação da modelagem de misturas, incluindo composições ternárias, aliada a metodologia de superfícies de resposta e otimização matemática e gráfica permitiu delimitar uma gama de composições de argilas que favorece a melhoria das propriedades reológicas e de filtração dos fluidos estudados.The purpose of this work was to study of composition effect of ternary bentonite mixtures on the rheology of drilling fluids. Through the experimental design were defined the components proportions in the ternary clays mixtures and then adjusted regression models relating apparent and plastic viscosities and water loss, with the proportion of each clay. The application of mixture experimental design, include ternary composition, response surface methodology, graphic and mathematical optimization allowed to delimit a strip of compositions that favors the improvement of the rheological properties of the drilling fluids.

  1. Nanocompósitos de polietileno/argila bentonita nacional: influência da argila e do agente compatibilizante PE-g-MA nas propriedades mecânicas e de inflamabilidade Polyethylene/national bentonite clay nanocomposites: influence of clay and PE-g-MA coupling agent on the mechanical properties and flammability

    Directory of Open Access Journals (Sweden)

    Gustavo F. Brito

    2008-06-01

    Full Text Available Nanocompósitos de polietileno de alta densidade/argila bentonita nacional foram preparados por intercalação por fusão. A influência da adição da argila sem tratamento e da argila tratada com o sal quaternário de amônio Cetremide e do polietileno graftizado com anidrido maléico (PE-g-MA como agente compatibilizante foi avaliada. Os sistemas obtidos foram caracterizados por inflamabilidade, propriedades mecânicas e reológicas, difração de raios X e microscopia eletrônica de transmissão. Os resultados de difração de raios X e microscopia eletrônica de transmissão indicaram a obtenção de nanocompósitos com estruturas parcialmente esfoliadas e/ou intercaladas que conduziram ao aumento do módulo de elasticidade e do valor do torque. O teste de inflamabilidade mostrou que a adição da argila na matriz polimérica e a presença do PE-g-MA retardaram a velocidade de queima do sistema, ou seja, diminuíram a inflamabilidade do PE puro. Em geral, o sistema contendo o agente compatibilizante (PE-g-MA exibiu melhorias na estabilidade térmica e nanocompósitos parcialmente esfoliados foram formados, quando comparados à matriz de polietileno de alta densidade. O polietileno graftizado com anidrido maléico não apenas promoveu a esfoliação da argila, mas também facilitou a adesão carga-matriz, obtendo-se com isso melhorias nos resultados mecânicos do sistema.High density polyethylene/national bentonite clay nanocomposites were prepared with the melt intercalation technique. The effect of the clay without treatment and clay treated with quaternary ammonium salt Cetremide with polyethylene-graft-maleic anhydride as coupling agent was evaluated. The systems were characterized by flammability, mechanical and rheological properties, X ray diffraction and transmission electron microscopy. In general, the results of X ray diffraction and transmission electron microscopy showed partially exfoliated and/or intercalated structures with

  2. ISOTERMAS DE ADSORÇÃO DE COBRE POR BENTONITA

    Directory of Open Access Journals (Sweden)

    Gilvanise Alves Tito

    2008-01-01

    Full Text Available In environmental studies is important to know the adsorption process of heavy metals in clay minerals, since they are able to immobilize these metals. Knowing the cations adsorption is influenced for several factors, the objective of this research was to study the copper adsorption process by bentonite clay and to evaluate the electrolyte type and pH influence on this process. In order to quantify the adsorbed copper, 2 g of bentonite clay were equilibrated for 24 hours with 20 mL of a NaNO3 (0,01 mol L-1 solution and with 20 mL of water containing different quantities of copper (5, 10, 20, 40, 60, 80, 100,120 mg L-1 as background solutions of pH values 4 and 6. Langmuir's adsorption equation in its linearized form was applied and the values of the maximum capacity and those of the constant related to the bonding energy were obtained. Langmuir isotherms presented two distinct adsorption regions at both pH 4 and pH 6, showing that the adsorptive phenomenon occurs in two distinct stages. The adsorption of copper depends on pH and ionic strength and it increased with an increase in pH and decreased slightly with an increase in ionic strength. The maximum capacity of adsorption and the bonding energy varied with the pH, with electrolyte used and with the adsorption regions.

  3. Spanish solid wastes legislation; Legislacion espanola de Residuos Solidos

    Energy Technology Data Exchange (ETDEWEB)

    Castrillon Pelaez, L.; Maranon Maison, E.; Rodriguez Iglesias

    2001-07-01

    A review is made of the regulations in the field of solid wastes with the aim of providing a useful working tool for those entities that generate or manage some type of waste. The coming into force of the current Spanish Wastes Law establishes common regulations for all wastes, substituting all previous Municipal Waste and Toxic and Dangerous Waste Laws. For reasons of greater practical applicability, we have preferred in this paper to classify wastes on the basis of their characteristics. The regulations are thus presented in a series of sections: municipal waste, dangerous wastes, sewage plant sludge, cattle waste and specific risk materials, highlighting in each case those areas of the regulations that are of greater interest for the producers and managers of solid wastes. (Author)

  4. Preparation and characterization of bentonite organo clay; Preparacao de caracterizacao de argilas bentonitas organofilicas

    Energy Technology Data Exchange (ETDEWEB)

    Bertagnolli, C.; Almeida Neto, A.F. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Quimica. Lab. de Engenharia Ambiental; Silva, M.G.C., E-mail: meuris@feq.unicamp.b [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Quimica

    2009-07-01

    Bentonite clays organically modified have great potential use for environmental remediation, especially in the separation of organic compounds from the water. The aim of this work was the preparation of organophilic clays from 'Verde-Lodo' bentonite clay with the quaternary ammonium salts cetyl-pyridinium chloride and benzalkonium chloride. The materials obtained were characterized by XRD, thermogravimetric analyses, Helium picnometry, SEM and energy dispersive X-ray techniques. The results show consistently successful synthesis of the organoclay through the increase in the basal spacing, as well as salt elimination picks and presence of carbon and chlorine in the modified clays; they are inexistent elements in the natural clay. (author)

  5. Hydrothermal alterations of Bentonites in Almeria (Spain); Alteracion hidrotermal de las bentonitas de Almeria

    Energy Technology Data Exchange (ETDEWEB)

    Linares Gonzalez, J.; Barahona Fernandez, E.; Huertas Garcia, F.; Caballero Mesa, E.; Cuadros Ojeda, J.

    1996-12-01

    The use of bentonite as backfilling and sealing material in the high level radioactive waste disposals has been treated in previous studies accomplished by different authors. However, the use of this clayey barrier needs the resolution of different problems so that its efficiency will be enhanced. between those could be cited the study of the actual capacity of sealing the space around the canister and the accommodation to the pressure of the rocky environment; the possible variations in plasticity; the diffusion and reaction processes that can be produced through the barrier by groundwater, the capacity of radionuclides adsorption, etc. These studies, show that the bentonites with high content in smectite fulfill satisfactorily with the physical and chemical conditions to be used as sealing material, but it is known that the smectite can be unstable in diagenetic conditions similar to those are given in a deep repository of radioactive wastes, being transformed into illite. A conclusion of immediate interest is deduced from this last study. The bentonites used as sealing material in radioactive waste repositories must no contain Na as interlayer cation since it is very easily exchangeable by K. It is better to select those smectites with Ca and Mg that detain the entry of K in the interlayer and as a consequence the transformation process of smectite into illite is made more difficult. (Author)

  6. Chitosan/bentonite bionanocomposites: morphology and mechanical behavior; Bionanocompositos quitosana/bentonita: morfologia e comportamento mecanico

    Energy Technology Data Exchange (ETDEWEB)

    Braga, C.R.C.; Melo, F.M.A. de [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Programa de Pos-graduacao em Ciencia e Engenharia de Materiais; Vitorino, I.F. [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Dept. de Ciencia e Engenharia de Materiais; Fook, M.V.L.; Silva, S.M.L., E-mail: suedina@dema.ufcg.edu.b [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais

    2010-07-01

    This study chitosan/bentonite bionanocomposite films were prepared by solution intercalation process, seeking to investigate the effect of the chitosan/bentonite ratio (5/1 e 10/1) on the morphology and mechanical behavior of the bionanocomposites. It was used as nanophase, Argel sodium bentonite (AN), was provided by Bentonit Uniao Nordeste-BUN (Campina Grande, Brazil) and as biopolymer matrix the chitosan of low molecular weight and degree of deacetylation of 86,7% was supplied by Polymar (Fortaleza, Brazil). The bionanocomposites was investigated by X-ray diffraction and tensile properties. According to the results, the morphology and the mechanical behavior of the bionanocomposite was affected by the ratio of chitosan/bentonite. The chitosan/bentonite ratio (5/1 and 10/1) indicated the formation of an intercalated nanostructure and of the predominantly exfoliated nanostructure, respectively. And the considerable increases in the resistance to the traction were observed mainly for the bionanocomposite with predominantly exfoliated morphology. (author)

  7. The Dawns of the Spanish Geo technic; Los albores de la Geotecnia espanola

    Energy Technology Data Exchange (ETDEWEB)

    Serrano Gonzalez, A.

    2013-06-01

    From a personal perspective, there are analyzed the first steps of the spanish Geotechnical Engineering history understood as an academic discipline but also linked in a very directly way the profession. This evolution is not foreign to the own history of the Geneticist in other countries of our cultural or geographical environment. The contributions discover that our predecessors transmitted important achievements to the international community. The direct presence in the international congresses of that time of the spanish geo technicians is analysed. Three consecutive stages are distinguished, personalizing in each of them the participation of celebrated spanish Civil Engineers. (Author)

  8. Spanish mining in the 2008-09; La mineria espanola 2008-09

    Energy Technology Data Exchange (ETDEWEB)

    Espi, J. A.; Sanz Contreras, J. L.

    2009-07-01

    The year 2008 and early 2009 has been for the Spanish mining a period of enormous significance. The world in crisis has an impact, however, differently in sub-sectors where the mineral industry is divided. Thus, those most directly linked to the construction industry (aggregates, dimension stone and industrial minerals) have collapsed the demand for their products. However, despite moments of uncertainty ending last year, solid fossil fuels and metal ores in general are between hope and lack of knowledge in the coming months. In this way, now we should be pleased to have four metal mines, at least some of them with real interest. (Author)

  9. Analysis of the situation of Spanish metal mining; Analisis de situacion de la mineria metalica espanola

    Energy Technology Data Exchange (ETDEWEB)

    Espi Rodriguez, J. A.; Vazquez Guzman, F.; Leon Altamirano, C.; Perez Macias, D.

    2015-07-01

    This article is a summary of the original document drawn up by the Task Force on Mineral Resources and Reserves of the National Association of Mining Engineers, available in free digital format through the Link. (Author)

  10. NUEVOS ENFOQUES DE LAS ENTIDADES FINANCIE RAS ESPANOLAS PARA EL NEGOCIO DE LAS TARJETAS BANCARIAS

    OpenAIRE

    Idoeta, Carmelo Mercado; del Castillo Peces, Carlos; de la Mata, Daniel Corral

    2010-01-01

    The objective of this academic research is to verify how and when Spanish financial institutions will need to reshape their card issuing business models in Spain as a consequence of the negative economic impact of the legally binding agreement signed on 2-12-2005 among the largest retail associations and the financial institutions represented by the three local processors (Servired, 4B and Euro6000). This legal agreement has implied a gradual but very significant reduction of the local int...

  11. Realities and paradoxes of the Spanish industry; Realidades y paradojas de la industria espanola

    Energy Technology Data Exchange (ETDEWEB)

    Torrens, L.

    2013-06-01

    Spanish industry has destroyed more than 900,000 jobs since the crisis. However, it has maintained and even increased their production and exports share in the whole European Union. Some indicators show competitive behavior of Spanish industry was correct in front of the rest of its European partners during the real estate bubble. The challenges facing the Spanish industry go through replacing the disappearance of the construction sector by to new emerging and more internationalized sectors. The article introduces the different items on the journal and makes several recommendations based on the results obtained. (Author)

  12. [Changes in CIRUGIA ESPANOLA Letters to the Editor between 2000 and 2007].

    Science.gov (United States)

    Rosell-Pradas, Jorge; Sánchez-Cantalejo, Emilio

    2008-09-01

    To describe the frequency and bibliographic characteristics of letters to the editor in the journal, Cirugía Española published between 2000 and 2007 and to compare the differences in the periods between 2000-2003 and 2004-2007. A descriptive and cross-sectional study, using the letters to the editor published in Spanish surgery between 2000 and 2007, as observation units. The variables considered were: the number of letters according to the volume and year of publication, substantive content of the paper, text length, graphics resources use, number of signatories and their professional profile, institutions of the authors, by origin and number of Autonomous Communities and number of bibliographical references. To meet the second objective, we compared letters from the period 2000-2003 with the period 2004-2007 against the rest of variables considered as a result. We used descriptive statistics and statistical analysis for comparison of distributions (chi2), with a level of significance of p < 0.05, using the SPSS software (Version 15.0). We identified 312 documents classified as letters. Between 2002 and 2005 their number was small. Often referring to clinical cases 187 (59.9%) and related letters, 98 (31.4%). Of those, 81.1% met the standard length of the text and only 6 letters (1.9%) was the use of graphics exceeded. In 122 letters (39.1%) the permitted number of authors was exceeded. They were mostly contributed by surgeons, 238 cases (76.3%), usually a single hospital, with 294 letters (94.2%) mainly from, Catalonia, Andalusia, Madrid and Valencia. Only 58.1% of the letters complied with the permitted number of references. More related letters were published in the last period (59 letters; 42.1%) than during the years 2000-2003 (39 letters; 22.7%) (chi2 = 14.79; p < 0.001). The correct length of the text improved in the second period, 136 (97.1%), compared to the first 117 (68%) (chi2 = 42.67; p < 0.001. The graphics resources were used properly in both periods. The number of signatories ranged between 1 and 5 in 51.2% of cases in the first period compared to 72.9% in the second (chi2 = 15.25; p < 0.001. In both periods analysed the professional profile of the signatories was similar. More than one institution was involved in 10% of the letters in the final period, compared to 2.3% in the first year period (chi2 = 8.36; p = 0.004). The adequacy of the number of permitted references was higher in the final period (87.1%) than in the initial (34.9%) (chi2 = 86.72; p < 0.001). The letters in Cirugía Española journal have regained their previous frequency after a period of stagnation between 2002 and 2005. In the final period of the study there was a marked improvement compared to the first one in most indicators studied.

  13. TITLE I PROJECTS AND OTHERS, ESPANOLA VALLEY PILOT PROGRAM RESEARCH. 1966-67 PRELIMINARY REPORT.

    Science.gov (United States)

    COLLIER, NINA PERERA

    THIS IS A COMPREHENSIVE REPORT OF THE ACTIVITIES OF YOUTH CONCERTS OF NEW MEXICO, INC., IN BRINGING ARTISTS TO ELEMENTARY AND HIGH SCHOOL CHILDREN IN TOWNS AND VILLAGES THAT HAVE HAD LITTLE OR NO CONTACT WITH LIVE PERFORMERS. A PILOT STUDY WAS CONDUCTED TO COMPARE THE INSTRUMENTAL AND VOCAL ENSEMBLES' EFFECTS ON STUDENTS IN URBAN SCHOOLS WITH…

  14. La pronunciacion espanola y los metodos de investigacion. (Spanish Pronunciation and Methods of Investigation.)

    Science.gov (United States)

    Torreblanca, Maximo

    1988-01-01

    Discusses the validity of studies of Spanish pronunciation in terms of research methods employed. Topics include data collection in the laboratory vs. in a natural setting; recorded vs. non-recorded data; quality of the recording; aural analysis vs. spectrographic analysis; and transcriber reliability. Suggestions for improving data collection are…

  15. Programa de lengua espanola: Guia para el profesor, 1 (Spanish Language Program; Teacher's Guide 1).

    Science.gov (United States)

    Martinez, Emiliano; And Others

    This teacher's guide is designed for use with the following textbooks in the Spanish language reading series: "Mira,""Mira y Lee,""Lee y Trabaja," and "Trabaja y Aprende." It contains lesson plans for each text and illustrations from the books themselves. (SK)

  16. Programa de lengua espanola: Guia para el profesor, 2 (Spanish Language Program: Teacher's Guide 2).

    Science.gov (United States)

    Martinez, Emiliano; And Others

    This teacher's guide is designed for use with "La Ciudad" and "Otros Amigos, Otras Culturas," two textbooks in the second part of the Spanish language series of readers. It contains lesson plans to enable the teacher to make better use of the texts and includes illustrations taken from each of the books themselves. (SK)

  17. Geoplat-Spanish Geothermal technology platform-; Geoplat-Plataforma Tecnologica Espanola de Geotermia-

    Energy Technology Data Exchange (ETDEWEB)

    Gregorio, M. de

    2009-07-01

    It was recently created the Spanish Geothermal Technology Platform-GEOPLAT- to provide a framework within, all sectors involved in the development of geothermal energy, leading the industry, work together in a coordinated way to ensure the commercial settlement of this renewable energy and its continuous growth, in a competitive and sustainable form. Its main objectives and structure are briefly described in the paper. (Author)

  18. Spanish participation in supranational and international fora; Participacion espanola en los foros supranacionales e internacionales

    Energy Technology Data Exchange (ETDEWEB)

    Calvo, J. I.; Cancio, D.; Munoz, M. J.; Revuelta, R.; Vano, E.; Alonso, A.

    2004-07-01

    The text describes the Spanish participation in committees and working groups related to radiation protection and radiological and nuclear safety in supranational organizations, such as the European Commission; in international governmental organizations, such as the International Atomic Energy Agency and the OECD Nuclear Energy Agency, and in scientific and technical commissions and associations, in particular, the International Commission on Radiological Protection, ICRP and the World Organization of Nuclear Operators, WANO. (Author)

  19. Lifetime of Bentonites study: hydrothermal stability of saponites; Estudio de longevidad en bentonitas: estabilidad hidrotermal de saponitas

    Energy Technology Data Exchange (ETDEWEB)

    Leguey, S.; Cuevas, J.; Garralon, A. [Universidad Autonoma de Madrid, Facultad de Ciencias, Departamento de Quimica Agricola, Geologia y Geoquimica, Madrid (Spain)

    1996-10-01

    The report studies the lifetime of bentonite and the hydrothermal stability of saponites. The testing comprised determination of physical and chemical properties of clays, the stability of the mineral porosity, lifetime and the wall of clay.

  20. Decantation time of evaluation on bentonite clays fractionation; Avaliacao do tempo de decantacao no fracionamento de argilas bentonitas

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, J.; Menezes, R.R.; Neves, G.A.; Lira, H.L; Santana, L.N.L., E-mail: lisiane@dema.ufcg.edu.b [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Dept. de Engenharia de Materiais

    2009-07-01

    Bentonite clays present a great number of industrial uses, from petroleum to pharmaceutics and cosmetic industry. The bentonite clay present particles with very fine particles that is responsible by the vast application of these materials. However, commercial clays present wide particle size distribution and a significant content of impurities, particularly quartz, in the form of silt and fine silt. So, the aim of this work is to analyze the effect of the stirring and decantation time in the deagglomeration, purification and size separation of the bentonite clay particles from Paraiba. The clays were characterized by X-ray diffraction and particle size distribution. Based on the results it was observed the decantation time give the elimination of the agglomerates formed by submicrometric particles. The uses of decantation column give separation of the fraction below 200nm. (author)

  1. Experimental Setup to Characterize Bentonite Hydration Processes; Diseno experimental para la caracterizacion de los procesos de hidratacion de la bentonita

    Energy Technology Data Exchange (ETDEWEB)

    Bru, A.; Casero, D.; Pastor, J.M.

    2001-07-01

    We present an experimental setup to follow-up the hydration process of a bentonite. Clay samples, of 2 cm x 12 cm x 12 cm, were made and introduced in a Hele-Shaw cell with two PMM windows and two steel frames. In hydration experiments, a fluid enters by an orifice in the frame, located both at the top and the bottom of the cell, to perform hydration in both senses. To get a uniform hydration we place a diffuser near the orifice. Volume influxes in hydration cells are registered in time. The evolution of the developed interface was recorded on a videotape. The video cameras was fixed to a holder so that the vertical direction in the monitor was the same as the direction of the larger extension of the cell. (Author) 6 refs.

  2. Asociacion Espanola de la Industria Electrica (UNESA) annual report 2006. Information about electricity activities; Asociacion Espanola de la Industria Electrica UNESA 2006 memoria estadistica. Informe sobre las actividades electricas

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    The annual report of UNESA, the industrial grouping of major power companies in Spain, gives statistical data relating to power generation, transmission and distribution and a summary of achievements during 2006. Power is generated from fossil fuel, nuclear, and hydro power. Cooperation of UNESA with international organizations is reported. Detailed figures are given for electricity production during the year. A summary of the report is available in English and Spanish on the website www.unesa.es.

  3. Asociacion Espanola de la Industria Electrica UNESA annual report 2000. Information about electricity activities; Asociacion Espanola de la Industria Electrica UNESA 2000 memoria estadistica. Informe sobre las actividades electricas

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    The annual report of UNESA, the industrial grouping of major power companies in Spain, gives statistical data relating to power generation transmission and distribution and summary of achievements during 2001. Power is generated from fossil fuel, nuclear, and hydro power. Information is given on emissions of SO{sub 2}, NOX and particulates. Cooperation of UNESA with international organizations is reported. Detailed figures are given for electricity production during the year, together with annual figures from 1940 to date.

  4. 24 Management of Haemorrhoids – A Personal Local Experience

    African Journals Online (AJOL)

    user

    2005-12-02

    Calpena RR. Effectiveness of rubber band ligation in haemorrhoids and factors related to relapse. Revista. Espanola de enfermedades digestivas – organo official de la Sociedad Espanola de Patologia Digestiva. 2003; 95:110-4,.

  5. Environmental management systems implemented in the Spanish nuclear power plants; Sistemas de gestion ambiental implantados en las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Redondo, R.; Fernandez Guisado, M. B.; Hortiguela, R.; Bustamante, L. F.; Esparza, J. L.; Villareal, M.; Yague, F.

    2013-09-01

    The companies that own the Spanish Nuclear Power Plants, aware of social concern and in the context of a growing demanding environmental legislation, have a permanent commitment to the electricity production based on the principles of a maximum respect for the environment, safety, quality, professionalism and continuous improvement. In order to minimize the environmental impact of their plants they have implemented and Environmental Management System based on the ISO 14001 Standard. They minimize the environmental impact by identifying the significant environmental aspects and defining the corresponding objectives. This article describes the referred environmental management systems and their environmental objectives, as applied and defined by the Spanish Nuclear Power Plants. (Author)

  6. Conservation promotion policy of the Spanish energy industry; Politica de promocion de conservacion de la energia en la industria espanola

    Energy Technology Data Exchange (ETDEWEB)

    Alonso, Juan Antonio

    1992-03-01

    This paper focalizes the energy general policy of Spain from the National Energy Plan (1991-2000), presenting the strategic lines and testing the main decisions to be adopted in this present decade 5 tabs.

  7. The future of the coal on the energetic Spanish policy; El futuro del carbon en la politica energetica espanola

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2008-07-01

    This work was born as a result of the decision of the Foundation for Studies on energy, to undertake and analysis on the role of coal in the X XI century, because although coal appears as the fuel to be most affected by the provisions of the fight against global warming, it must be recognized its essential contribution in ensuring the power supply and to contain the cost of the kWh. The study was prepared by a group of professionals of the energy sector, without direct commercial links with the subject discussed, but with acknowledges expertise technique. It is pertinent to stress that the purpose of this study is to provide data and analyze rigorously technical options with a view to be able to use the coal energy, minimizing and, theoretically, eliminating the CO{sub 2} emissions. It is therefore not a document produced from predetermined positions, but it is deducted from the characteristics of the nature and mechanisms and other processes involved in generating electricity from coal, and in the treatment of generated CO{sub 2} for it not to reach the atmosphere. We intend to contribute to the better understanding by our society, a major problem for our economy and out welfare. (Author)

  8. Sources for researching the business history of Spanish mining; Fuentes para la historia empresarial de la mineria espanola

    Energy Technology Data Exchange (ETDEWEB)

    Perez de Perceval Verde, M. A.; Lopez-Morell, M. A.

    2013-09-01

    This article analyzes the sources available when studying the firms that have exploited underground resources in Spain in contemporary times. The materials we have are diverse, given the variety of mining areas, minerals, types of firms, nationalities involved, etc. Large businesses are covered, in the main, by business archives, which have evolved in different ways, whilst for smaller concerns and when reconstructing an overall business and production map the researcher is better served by tax registers, in particular those on the gross production tax. A wide set of sources with details of where to find them, what they offer, the obstacles they can produce and how best to use them to study the mining business fabric is also included. (Author)

  9. The role of the consulting engineering and Spanish; el papel de la Ingenieria y la Consultoria Espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Manzanedo del Rivero, I.; Casanova Valcazar, M.

    2011-07-01

    Within the Spanish energy model, the role assigned to the engineering and consulting is extensive, you must define an energetic mix. Aside for studies and projects are the product of everyday classic engineering companies, on the other, energy audits are a tool of the first order to know the current situation regarding energy consumption and to propose actions and measures that seek better use of energy and convergence with the model defined. (Author)

  10. {sup 14}C in human diet in three Spanish locations; {sup 14}C en dieta humana en tres localizaciones espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Gomez Martinez, I.; Santos Arevalo, F. J.; Manjon, G.; Garcia-Tenorio, R.

    2011-07-01

    {sup 14}C reach humans via the diet. In this study we present the results of diet samples from three locations type Spanish, Seville, Caceres and Tenerife. These diets are collected quarterly and historical dates back to early 2008.

  11. Spanish industry and competitiveness. The overview from the Industrial Observatories; Industria espanola y competitividad. La vision desde los observatorios industriales

    Energy Technology Data Exchange (ETDEWEB)

    Ortigosa Goni, J. A.; Fuente Garcia, T. de la

    2012-07-01

    This article analyzes the competitiveness of the Spanish industry. It explains the interdependencies and relations that link globalization, internationalization and international trade with competitiveness. The main features of the Spanish industry are also studied in depth, its strengths and weaknesses. Finally, the challenges that the Spanish industry will face in the future are considered, as well as the role that the industrial observatories will play in that context. (Author)

  12. [Retrospective analysis of the use of the Spanish words severo and severidad in CIRUGIA ESPANOLA during 2007].

    Science.gov (United States)

    Martínez-Ramos, David

    2008-12-01

    The Spanish words severo (severe) and severidad (severity) are usually used as a synonyms of grave (serious) and gravedad (seriousness), although the Spanish Royal Academy of Language (Real Academia Española [RAE]) specifically recommends not to use them in this sense. A retrospective analysis to evaluate the use of the words severo and severidad in Cirugía Española during 2007 was performed. All the articles published in Cirugía Española during 2007 were reviewed. The articles in which severo and/or severidad were present were selected. For each article, the month of publication, the type of article, the geographic origin and the exact sentence containing these words were analyzed. Correctness and incorrectness of their use was studied according to the RAE normative. A total of 33 articles were selected. Every month (except for January) had, at least, 2 articles. Thirty-one of the articles were from Spain whereas 2 were from Hispano-America. Eleven cases were original articles, 7 reviews, 6 case reports, 3 editorials, 3 special articles and 3 letters to the editor. The Spanish words severo and severidad are inadequately used too often in scientific texts. It must be avoided using them as a synonym of grave, importante or serio, incorrect translations of the English word severe.

  13. Radiation hazard surveillance in spanish uranium mines; Control de los peligros de la radiactividad en las minas de uranio espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Iranzo, E.; Liarte, J.

    1963-07-01

    The regulations applied in the uranium mines which belong to the Junta de Energia Nuclear to control the radioactive hazards, and to get the personal protection avoiding overexposures in the external radiation and inhalation of radioactive dust and gases are given. The Radon daughters concentration in the atmosphere of Avery one of the mines and the external radiation exposure and uranium excretion in urine of the miners during 1962 are specified. (Author) 9 refs.

  14. Forum Spanish leading brands, experience of international competitiveness; El foro de marcas renombras espanolas, una experiencia para la competitividad internacional

    Energy Technology Data Exchange (ETDEWEB)

    Bonet Feffer, J. L.

    2011-07-01

    In 1999, the Leading Brands of Spain Forum was created as an institution with a mixed nature, public and private, whose main mission is the defence and promotion of the Spanish renowned and well-known brands strongly internationalized, as basic elements for the international competitiveness of our country. Since then, its activity has focused on the strategic importance of these intangible assets of the companies and the country, its leading brands, on which the international positioning of the Spain Brand will strongly rely on. (Author) 7 refs.

  15. Determinants of labor safety management in Spanish companies; Determinacion de la gestion de la seguridad laboral en las empresas espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Muniz, B.; Montes Peon, J. M.; Vazquez Ordas, C. J.

    2011-07-01

    Managing health and safety risks in an integrated way with the operations of the organization has been of increasing importance in recent years. This approach reduces accident rates, reducing losses and improves the firm's productivity. However, very little attention has been paid to analyse the organizational factors that favour or limit the implementation of the safety management system in firms. In an attempt to address this gap in the literature, the present study focuses on the identification of the characteristics of the organization that encourage the development of this system. The results show that several factors, as firm's size, previous experience on quality and environmental management or internationalisation, among others, have a positive influence on safety management system. (Author) 62 refs.

  16. Study of the Properties of Bentonites for their use in Clay Geo synthetic Barriers; Estudio de la propiedades de las bentonitas para su utilizacion en barreras geosinteticas arcillosas

    Energy Technology Data Exchange (ETDEWEB)

    Leiro Lopez, A.; Mateo Sanz, B.; Garcia Cidoncha, H.; Blanco Fernandez, M.

    2014-02-01

    Bentonites used for the production of clay geo synthetic barriers need to meet some properties so that they can be a waterproofing system. among the bentonites used in industry, sodium bentonite has the lowest permeability due to its high water absorption capacity in the inter-laminar space, causing it to swell and form a barrier to water flow. this paper provides the study of the properties of four bentonite to evaluate their quality the study of the properties of four bentonite to evaluate their quality. For this study, the main properties have been tested: water absorption, swelling index, fluid loss, cation exchange capacity and montmorillonite content. In order to optimize the procedure for the characterization of bentonites, correlations between different tests have been done, to identify the most suitable ones. Finally, a compatibility test has been carried out to study the performance of bentonites in water containing a high amount of sales, because in this case, an ion exchange between the interlayer sodium ions of bentonite and cations dissolved in the water can take, resulting in a decrease swell of the bentonite. (Author)

  17. Bentonites of the Irati Formation in the southern sector of the Parana Basin, Brazil; Bentonitas da Formacao Irati no setor sul da Bacia do Parana

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Aurelio Fagundes; Dani, Norberto; Remus, Marcus Vinicius Dornelles; Sommer, Margot Guerra, E-mail: norberto.dani@ufrgs.br, E-mail: marcus.remus@ufrgs.br, E-mail: margot.sommer@ufrgs.br [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil); Horn, Bruno Ludovico Dihl, E-mail: brunoldhorn@gmail.com [Servico Geologico do Brasil (CPRM), Recife, PE (Brazil). Superintendencia Regional

    2017-01-15

    This paper aims to identify and to present mineralogical and chemical arguments that demonstrate the existence of bentonite levels in the Irati Formation, found in outcrops to the west Acegua in southern Rio Grande do Sul (Brazil). These levels are thin, on average 4 cm thick, large in area, and are composed of grayish-white to greenish massive clay stones that contrast, in the field, with the shales of the Irati Formation. The bentonite levels of the Irati Formation are predominantly composed of Ca-montmorillonite, which constitutes the fine matrix of the rock; and scattered primary or magmatic crystals not larger than very fine sand. Among the main primary minerals representative of volcanic setting, it is possible to identify β-quartz paramorphs, sanidine, biotite, zircon, apatite and ilmenite, in addition to quartz and feldspar shards (splinters). More rarely, fragments of meso and macrocharcoals are found within the bentonite layers, which contrast with the maturity and type of non-vegetal organic matter of the Irati shale. Therefore, the nature of the precursor volcanism is inferred on the basis of rock geochemistry and crystal chemistry of the neoformed montmorillonite in the bentonite levels. Both methodologies indicate that during this period the volcanic ashes that reached the Parana Basin were generated by volcanism of intermediate composition, which is in accordance with what is known about the Lower Choiyoi Volcanic Province manifestations, which were synchronous with the sedimentation of the Irati Formation in the Parana Basin. (author)

  18. Hydrothermal alkaline stability of bentonite barrier by concrete interstitial wastes; Alteracion alcalina hidrotermal de la barrera de bentonita por aguas intersticiales de cementos

    Energy Technology Data Exchange (ETDEWEB)

    Leguey Jimenez, S.; Cuevas Rodriguez, J.; Ramirez Martin, S.; Vigil de la villa Mencia, R.; Martin Barca, M. [Universidad Autonoma de Madrid, Madrid (Spain)

    2002-07-01

    At present, the main source of High Level radioactive Waste (HLW) is the electrical energy production during all the steps of developing. In almost all the countries with nuclear programs, the option for the final management of HLW is the Deep Geological Repository (DGR) based on the concept of multi barrier. According to this concept, the waste is isolated from biosphere by the interposition of confinement barriers. Two of the engineering barriers in the Spanish design of DGR in granitic rock are compacted bentonite and concrete. The bentonite barrier is the backfilling and sealing material for the repository gallery, because of its mechanical and physico-chemical properties. The main qualities of concrete as a component of a multi barrier system are its low permeability, mechanical resistance and chemical properties. With regard to chemical composition of concrete, the alkaline nature of cement pore water lowers the solubility of many radioactive elements. However, structural transformation in smectite, dissolution or precipitation of minerals and, consequently, changes in the bentonite properties could occurs in the alkaline conditions generated by the cement degradation. The main objective of the present work is to evaluate the effect of concrete in the stability of Spanish reference bentonite (La Serrata of Nijar, Almeria, Spain) in conditions similar to those estimated in a DGR in granitic rock. Because of the main role of bentonite barrier in the global performance of the repository, the present study is essential to guarantee its security. (Author)

  19. Geochemical Processes and compacted bentonite FEBEX with a thermohydraulic gradient with a thermohydraulic gradient; Procesos geoquimicos y modificaciones texturales en bentonita FEBEX compactada sometida a un gradiente termohidraulico

    Energy Technology Data Exchange (ETDEWEB)

    Leguey Jimenez, S.; Cuevas Rodriguez, J.; Martin Barca, M.; Vigil de la Villa Mencia, R.; Ramirez Martin, S.; Garcia Gimenez, R. [Universidad Autonoma de Madrid (Spain)

    2002-07-01

    At present, the main source of High Level radioactive Waste (HLW) is the electrical energy production during all sep of developing. In almost all the countries with nuclear programs, the option for the final management of HLW is the Deep Geological Repository (DGR), based on the concept of multi barrier. According to this concept, the wastes is isolated from biosphere by the interposition of confinement barrier. In the context of an investigation of the near field for a repository of HLW, the FEBEX Project, a set of laboratory test has been designed to give a better understanding of the thermo-hydro-mechanical and geochemical behaviour of the compacted bentonite as a confinement barrier. The object of these work is to analyse the properties of the bentonite and its behaviour under conditions that will be found in a repository. The precipitation of mineral phases, due to local changes in the chemical equilibrium and the hydration itself, can produce changes in the salinity of the interstitial water and in the microstructural organisation of the clay particles. the hydraulic and mechanical properties of the bentonite can be modified by the special conditions of the barrier. (Author)

  20. Preparation and performance of Ecobras/bentonite biodegrading films; Preparacao e desempenho de filmes polimericos biodegradaveis a base de Ecobras e bentonita

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Ana Nery M.; Melo, Nadja M.C.; Canedo, Eduardo L.; Carvalho, Laura H., E-mail: laura@dema.ufcg.edu.br [Unidade Academica de Engenharia de Materiais, Universidade Federal de Campina Grande (UAEMa/UFCG) Campina Grande, PB (Brazil); Araujo, Arthur R.A. [Felinto Industria e Comercio Ltda., Campina Grande, PB (Brazil)

    2011-07-01

    Compounds based on the biodegradable polymer Ecobras and bentonite clay in its pristine, sonicated, and organically modified with a quaternary ammonium salt forms were prepared as flat films. Clays and compounds were characterized by x-ray diffraction and scanning electron microscopy. Mechanical properties of the films were determined according to pertinent ASTM standards. Reasonable properties, higher than those of the matrix, were obtained with compounds prepared with purified clays and organoclays, particularly for low clay loading. (author)

  1. Study of mechanical properties of films of nanocomposites LLDPE/bentonite; Estudo das propriedades mecanicas de filmes de nanocompositos PEBDL/bentonita

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Eduardo M.; Carvalho, Laura H.; Canedo, Eduardo L.; Coutinho, Maria G.F.; Costa, Raquel B., E-mail: laura@dema.ufcg.edu.br [Unidade Academica de Engenharia de Materias, Universidade Federal de Campina Grande (UAEMa/UFCG) Campina Grande, PB (Brazil); Araujo, Arthur R.A. [Felinto Industria e Comercio Ltda., Campina Grande, PB (Brazil)

    2011-07-01

    Mechanical properties of LLDPE/bentonite clay were determined as a function of clay content (1 and 2% w/w), purification and organophilization. Raw materials were characterized by FTIR and XRD. Nanocomposites were obtained as flat films and characterized by XRD and mechanical properties. Results indicate that best overall mechanical properties were displayed by systems containing purified clay and that they tended to decrease with increasing clay content. Organofilization was effective and only intercalated nanocomposites were obtained. (author)

  2. Characterization of sodium bentonites: effect of treatment with ammonium salt- free organic surfactant; Caracterizacao de bentonitas sodicas: efeito do tratamento com surfactante organico livre de sal de amonio

    Energy Technology Data Exchange (ETDEWEB)

    Morita, R. Y.; Barbosa, R. V.; Kloss, J.R., E-mail: julianaweber@utfpr.edu.br [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba, PR (Brazil). Dartamento de Quimica e Biologia

    2015-07-15

    Bentonite, which the main clay mineral is montmorillonite, are commercially attractive because of its abundance in nature. The clays can be modified by ion exchange reactions of ions contained in the interlayer region with cationic surfactants that include ammonium or phosphonium salts. The clays origin and the type of surfactants (modifiers) are the main factors in the alteration of physical and chemical properties of these materials. This study aims to characterize and compare the results of natural bentonite commercially available and the effect of treatments with quaternary ammonium salt and an organic compound free of ammonium salt. The FTIR and XRD results indicate the process of organophilization of clays after treatment with the surfactants. These treatments have altered the average particle size, suggesting the formation of agglomerates, which was showed in the SEM images. The results of surface area and particle size data indicated the presence of larger particles. Although the two surfactants have shown similarities in the investigated properties, the organoclays free of ammonium salt are more promising in terms of its use as well as for their preparation and solubility. (author)

  3. Modifications in Compacted MX-80 Bentonite Due to Thermo-Hydraulic Treatment; Modificaciones en la Bentonita MX-80 Compactada Sometida a Tratamiento Termo-Hidraulico

    Energy Technology Data Exchange (ETDEWEB)

    Gomez-Espina, R.; Villar, M. V.

    2013-09-01

    The thermo-hydraulic tests reproduce the thermal and hydraulic conditions to which bentonite is subjected in the engineered barrier of a deep geological repository of radioactive waste. The results of thermo-hydraulic test TBT1500, which was running for approximately 1500 days, are presented. This is a continuation to the Technical Report Ciemat 1199, which presented results of test TBT500, performed under similar conditions but with duration of 500 days. In both tests the MX-80 bentonite was used with initial density and water content similar to those of the large-scale test TBT. The bentonite column was heated at the bottom at 140 degree centigrade and hydrated on top with deionized water. At the end of the test a sharp water content gradient was observed along the column, as well as an inverse dry density gradient. Hydration modified also the bentonite microstructure. Besides, an overall decrease of the smectite content with respect to the initial value took place, especially in the most hydrated areas where the percentage of interest ratified illite increased and in the longer test. On the other hand, the content of cristobalite, feldspars and calcite increased. Smectite dissolution processes (probably colloidal) occurred, particularly in the more hydrated areas and in the longer test. Due to the dissolution of low-solubility species and to the loss of exchangeable positions in the smectite, the content of soluble salts in the pore water increased with respect to the original one, especially in the longer test. The solubilized ions were transported; sodium, calcium, magnesium and sulphate having a similar mobility, which was in turn lower than that of potassium and chloride. The cationic exchange complex was also modified. (Author)

  4. The effectivity of bentonites in cesium retention of cemented waste products; Efetividade das bentonitas na retencao de cesio em produtos de rejeitos cimentados

    Energy Technology Data Exchange (ETDEWEB)

    Tello, Cledola Cassia Oliveira de

    2001-01-15

    The nuclear energy has been used for the human development in different areas, as in the medicine, in the agriculture, in the industry and in the environmental protection, besides the electricity generation. As in other activities, in the use of nuclear energy, residues are also generated. They are considered radioactive wastes when the contaminant content can bring a potential negative impact in the human health and in the environment. In this case they should be properly managed and should not be released without treatment. In general the waste processing consists in a volume reduction followed by solidification and/or conditioning. A number of materials can be considered as immobilisation matrices for the wastes, with the objective of maintain the radioactive material physical and chemically stable. The cement is extensively used because it is easy to obtain, there is large. experience in its use and the processing is done at room temperature. Many materials have been studied to improve the fixation characteristics of the radionuclides in the cemented product. The aim of this study was to search, among Brazilian natural materials, those that could be effective in the contaminant retention without jeopardising the process and other characteristics of the waste product. Four types of bentonite were selected to the process and product evaluation tests. Many mixtures were prepared with simulated waste, cement and bentonite in different proportions. The viscosity, set time, compressive strength and leaching were evaluated. In addition it was verified if the products were monolithic and without free water. Inactive caesium was used as tracer. The leaching resistance is the most important parameter in the product evaluation, because it indicates the retention capacity of the matrix for radionuclides when the product is in contact with the water. In 1985 leaching tests were begun and they have been continued till now and from their results it was proved that the bentonites were efficient in the caesium retention. The leaching data were analysed by a BNL computer program that models four release mechanisms. A good fit was obtained for the partition mechanism. The results obtained in this study can be used in the repository safety assessment. (author)

  5. Gas transport in the bentonite barrier of AGP and their interfaces; Transporte de gas en la barrera de bentonita de un AGP y sus interfases

    Energy Technology Data Exchange (ETDEWEB)

    Gutierrez Rodrigo, V.; Villar Gelicia, M. V.; Martin Martin, P. L.; Romero Alvarez, F. J.

    2014-07-01

    The research of gas transport processes through the barriers is of great relevance in the assessment of the behaviour of the repository. The main objective of this study is to determine the properties of gas transport in saturated bentonite samples and the interfaces between them. (Author)

  6. Mechanical thermal evaluation of polyamide 6 with bentonite organo clay nanocomposites;Propriedade termomecanica de nanocompositos de poliamida 6 com argila bentonita organofilica

    Energy Technology Data Exchange (ETDEWEB)

    Paz, Rene Anisio da; Araujo, Edcleide M.; Melo, Tomas Jeferson Alves de; Leite, Amanda M.D.; Cavalcanti, Shirley Nobrega, E-mail: rene@cct.ufcg.edu.b [Universidade Federal de Campina Grande (UFCG), PB (Brazil); Pessan, Luiz Antonio [Universidade Federal de Sao Carlos (UFSCar), SP (Brazil)

    2009-07-01

    This work had for objective to obtain polymeric nanocomposites of polyamide 6 and a clay consisting of silicates layer from of Paraiba mines and to evaluate evaluation mechanical thermal in different processing conditions. The clay was organically modified using a quaternary ammonium salt (Cetremide), so that there is a larger interaction of the clay with the polymer. The obtained nanocomposites showed the morphological structure composed exfoliated/partially exfoliated, as shown XRD. The results of HDT it because the clay increases the dimensional stability of PA6 in high temperatures, making possible the use of the nanocomposites for making of pieces with good resistance to the heat distortion. (author)

  7. Effects of Sterilizing Agents on Microorganisms

    Science.gov (United States)

    1963-03-01

    BEHAVIOR OF BACILLUS CEREUS) ON 5.FLUOROURACIL-PRETREATED Cabezas de Herrera, E. BACTERIA Microbiologia Espanola, v. 14, no. 1, pp. 53-58, 1961 Ben... Microbiologia Espanola, v. 14, no. 2, pp. 107-112, EFFECTS OF ULTRAVIOLET LIGHT UPON 1961 BACTERIA. I. ALTERATIONS OF THE The influence of ultraviolet...growth curve is studied. (BA. v. :37, 1962, Microbiologia Espanola, v. 14, no. 1, pp. 7-16, 1961 #4703) Prior to irradiation, 37 physiological

  8. Application of Spanish legislation on radiation protection in contaminated soils; Aplicacion de la normativa espanola sobre suelos contaminados en proteccion radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Trueba Alonso, C.; Robles Atienza, B.

    2013-07-01

    As the developments that have led the regulations on contaminated soils conventional pollutants are more advanced than those due to radioactive contaminants, this work is a state of the art of the current situation and is framed within the developments in R and D for radiation protection of the public and the environment. (Author)

  9. Evaluating wind power potential in the Spanish Antarctic Base (BAE); Evaluacion del Potencial Eolico en la Base Antartica Espanola Juan Carlos I

    Energy Technology Data Exchange (ETDEWEB)

    Arribas de Paz, L. M.; Garcia Barquero, C.; Navarro Montesinos, J.; Cuerva Tejero, A.; Cruz Cruz, I.; Roque Lopez, V.; Marti Perez, I. [Ciemat. Madrid (Spain)

    2000-07-01

    The objective of the work is to model wind field in the surroundings of the Spanish Antarctic Base (BAE in the following). The need of such a work comes from the necessity of an energy source able to supply the energy demand in the BAE during the Antarctic winter. When the BAE is in operation (in the Antarctic summer) the energy supply comes from a diesel engine. In the Antartic winter the base is closed, but the demand of energy supply is growing up every year because of the increase in the number of technical and scientific machines that remain in the BAE taking different measurements. For this purpose the top of a closed hill called Pico Radio, not perturbed by close obstacles, has been chosen as the better site for the measurements. The measurement station is made up with a sonic an-emometer and a small wind generator to supply the energy needed by the sensors head heating of the anemometer. this way, it will be also used as a proof for the suitability of a wind generator in the new chosen site, under those special climactic conditions. (Author) 3 refs.

  10. R and D as a future strategy for the Spanish shipbuilding; La I+D+I como estrategia de futuro para la construccion naval espanola

    Energy Technology Data Exchange (ETDEWEB)

    Novoa Rojas, E. M.; Carneros Lozano, A. M.

    2012-07-01

    This paper analyses the link between the RDI and the growth and competitiveness of companies in the shipbuilding sector. We examine the development activity on the technical and technological matters. It is noted that the RDI is a pivot of economic growth, discusses the European context and the time currently lives with enhancing measures such as: the so-called Blue Economy and the Integrated Maritime Policy, in which the sea is an important role. (Author)

  11. Evolution of Spanish industrial companies in the first decade of XXI century; Evolucion de las empresas industriales espanolas en la primera decada del siglo XXI

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Tirados, R. M.; Medina Rojas, S.

    2011-07-01

    This article discusses the key issues that have influenced the evolution of Spanish industrial companies in the first decade of XXI century. This evolution is clearly influenced by the economic crisis that began in 2007 and has become clear in 2008. As for industrial production, is made a forecast based on an data analysis and the results have achieved if the current economic crisis would not have taken place. Another aspect presented refers to the organization of Spanish companies, the influence of industrial policy and equally, the role of technology parks and synergy's between university-business to these parks. (Author)

  12. The logistics, the key for the competitiveness of the Spanish vehicle manufacturing plants; La logistica, clave para la competitividad de las plantas espanolas de fabricacion de vehiculos

    Energy Technology Data Exchange (ETDEWEB)

    Garcia Lopez, A.

    2012-07-01

    This article aims to outline the logistics chain in the automotive sector and analyze the current situation of the different modes of transport for finished vehicles. Nowadays the Spanish production plants depend on the export, wage levels are very close to the European average and transport costs are winning importance. With the integration of new EU countries with cheaper labor costs and more favorable geographical situation, the distribution logistics become a key variable for the competitiveness of Spanish automotive industry. All data used come from official sources and are as updated as possible. (Author)

  13. Stability analysis criteria in landfill design based on the Spanish code; Criterios de estabilidad en el diseno de un vertedero, basado en la normativa espanola

    Energy Technology Data Exchange (ETDEWEB)

    Estaire Gepp, J.; Pardo de Santayana, F.

    2014-02-01

    The design of a landfill requires performing stability analyses. To perform such analyses it is necessary to define different design situations and their corresponding safety factors. Geo synthetics are normally used to construct the lining system of the landfills, causing critical slip surfaces to pass along one of the different geo synthetic interfaces. Determination of the shear strength of such critical interfaces is, therefore, an extremely important issue. In this paper, these aspects are analysed based on what is set in the Spanish codes and in the technical literature. As a result of the study, some tables are presented which relate the different design situations (normal, accidental or extraordinary) to the shear strength of the lining system to be used (peak or residual) and define the minimum factor of safety to be accomplished. (Author)

  14. New Sounds of the English Consonants for Spanish Speakers Learning English (Sonidos Nuevos de las Consonantes Inglesas Para los de Habla Espanola Aprendiendo Ingles).

    Science.gov (United States)

    Nagore, Mary Louise

    This book "represents an effort to present in simply and readily understood terms some of the sounds in English that create problems for the Spanish speaker learning English." Each of the 18 chapters teaches a specific consonant through a comparison of the Spanish and English pronunciations, facial diagrams, explanations of articulation, minimal…

  15. Membrane Bioreactors design and operation improvements: The Spanish Experience; Avances en el diseno y la operacion de los biorreactores de membrana: La experiencia espanola

    Energy Technology Data Exchange (ETDEWEB)

    Iglesias Esteban, R.; Ortega de Miguel, E.; Martinez Tarifa, M. A.; Simon Andreu, P.; Moragas Bouyart, L.; Garcia Fernandez, E.; Robuste Cartro, J.; Rodriguez-Roda layret, I.

    2012-07-01

    A Membrane Bioreactor (MBR) is a modification of a conventional activated sludge (CAS) plant where the secondary settling ins replaced by a low pressure ultrafiltration (UF) or micro filtration (MF) membranes separation process in order to obtain an effluent almost free of suspended solids and microorganisms. since the first MBR installation in 2002, the number and capacity of these systems have exponentially increased in spain, driven by the high quality of the effluent which allows direct reuse and discharge into environmentally sensitive areas, the compactness and automation of these plants and the possibility of upgrading existing wastewater treatment plants (WWTP) which no longer reach the required effluent quality levels. There were 45 operating MBR systems in 2011 and the total municipal wastewater treatment capacity by this type of plants will be about 90 hm{sup 3} in 204 when the current projects have been implemented. Today, Spain public and private wastewater management agencies consider MBR plants as an alternative of treatment but first they had to face a complex learning period to operate and design this kind of system. A significant progress has been made over the last years, but especially energy efficiency responds to the challenge of continuous improvement. Membrane fouling control consumes most of the energy involved in the process therefore, anti fouling materials and better membrane air-scour systems that allow the frequency and intensity of air flow to be controlled in realtime, are being investigated. This brings MBR closer to the CAS process in terms of energy efficiency. Breakthroughs in the design and operation of MBR plants are being collected in a guide for the implementation of MBR led by CEDEX, in which the main managers and operators are involved. This paper presents some of these improvements. (Author) 9 refs.

  16. The Social Dimension of Science in the 2010 Spanish Presidency; La dimension social de la ciencia en la Presidencia Espanola de 2010

    Energy Technology Data Exchange (ETDEWEB)

    Martinez Riera, C.

    2010-07-01

    During the Spanish Presidency of the European Union in the first half of this year, Spain will decisively promote the social dimension of science and innovation. Spain thereby seeks to mobilize the capabilities and resources of the Member States and the Union as a whole to confront the growing challenges posed by poverty and social exclusion, aggravated by the recent global financial crisis. To this end, Spain will hold an international Conference in La Granja (Segovia) on April 8-9. The conclusions of this conference will be included in the political agenda of the EU Council in May. Spain is determined to have the social dimension of science and innovation become a fundamental pillar of the European Research Area. (Author)

  17. Balance of the Spain presidency of the EU in the energy sector; Balance de presidencia espanola de la UE en el sector de la energia

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Finat, A.

    2010-07-01

    Notwithstanding certain difficulties inherent to the transition period undergone by the European Commission at the beginning of 2010, the Spanish Presidency of the Council has achieved all the energy policy related targets which were at hand. This refers in particular to the key instrument for security of supply, the so called gas regulation, or to the drawing of Council Conclusions on the Energy Action Plan 2011-20 or on the financing of the energy industrial initiatives linked to the SET plan. (Author) 19 refs.

  18. Spanish experience in the use of synthetic geo membranes for hydraulic works; Experiencia espanola en el uso de geomembranas sinteticas en obras hidraulicas

    Energy Technology Data Exchange (ETDEWEB)

    Blanco Fernandez, M.; Leiro Lopez, A.

    2014-02-01

    The Spanish institution Centro de Estudios y Experimentacion de Obras Publicas (CEDEX) has studied for decades the behaviour of geosynthetic products, specially the polymeric geo synthetic barriers used as waterproofing systems of different hydraulic works, mainly in reservoirs. Both in geotextiles or related products and in geomembranes, initial characteristics are determined; besides of that, periodic controls along the service life are performers in geomembranes. The monitoring of more than two hundred hydraulic structure hydraulic structures requires technical inspection, taking samples and replacing them, experimental tests and recommendations, with the purpose of increasing security and durability in hydraulic structures. Because of that, the Spanish experience in this field of technology is presented along this paper. (Author)

  19. Medical Physics in the new undergraduate curriculum of Spanish medical schools; La Fisica Medica en los nuevos planes de estudio de grado de las facultades de medicina espanola

    Energy Technology Data Exchange (ETDEWEB)

    Guibelalde, E.; Calzado, A.; Chevalier, M.

    2011-07-01

    The purpose of this paper is to present a systematic review of the contents of Medical Physics in the curricula of the new curriculum Grade in Spanish medical schools after the entry into force of that legislation.

  20. Fuel cycle management by the electric enterprises and spanish nuclear Power plants; Gestion del ciclo de combustible por las empresas electricas y centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Celma, E. M.; Gonzalez, C.; Lopez, J. V.; Melara, J.; Lopez, L.; Martinez, J. C.; Culbras, F.; Blanco, J.; Francia, L.

    2015-07-01

    The Nuclear Fuel Group reports to the Technology Committee of the UNESA Nuclear Energy Committee, and is constituted by representatives of both the Spanish Utilities and the Nuclear Power Plants. The Group addresses the nuclear plant common issues in relation to the operation and management of the nuclear fuel in their different stages of the Fuel Cycle. The article reviews the activities developed by the Group in the Front-End, mainly in the monitoring of international programs that define criteria to improve the Fuel Reliability and in the establishment of common bases for the implementation of changes in the regulation applying the nuclear fuel. Concerning the Back-End the Group focuses on those activities of coordination with third parties related to the management of used fuel. (Author)

  1. Spanish firms patenting in the European office. characteristics compared with non-applicant; Las empresas espanolas que patentan en la oficina Europea. Caracteristicas comparadas con las no solicitantes

    Energy Technology Data Exchange (ETDEWEB)

    Barajas, A.; Huergo, E.; Moreno, L.

    2012-07-01

    The objective of this paper is to provide evidence about the features of Spanish firms applying for patents to the European Patent Office between 1998 and 2008. We compare these firms with a control sample of non-applicants during the same period and focus especially on firms that have been awarded public aid for R and D projects by the Centre for the Development of Industrial Technology. (Author) 14 refs.

  2. El uso de escritos ensayisticos en clases de lengua espanola a nivel intermedio y superior (The Use of Written Essays in Intermediate and Advanced Level Spanish Language Classes).

    Science.gov (United States)

    Busch, Hans Jorg

    1994-01-01

    Presents as an alternative to the traditional Spanish textbook a modular approach that consists of activities based on essay reading and grammar exercises. Students liked this form of instruction, and most indicated that they had learned material previously unknown to them. (seven references) (Author/CK)

  3. The globalization of brands and competitiveness, trends and challenges for Spanish; La globilizacion de las marcas y la competitividad. tendencias y retos para las empresas espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Cervino, J.; Baena, V.

    2011-07-01

    Increasing competitive global, augmented by the rise of new multinationals from emerging countries and the concentration and internationalization of large global distribution networks, is forcing companies and Spanish brands to accelerate their plans for international expansion and consolidation. To do this, we need a change of perspective in the external competitive focus. We must move from a vision of sellers, with a position of lowest price, to one of marketers by adopting a strategic vision focused on sustain ability and long-term profitability through innovation products and services, sold under brands with projection and international reputation. (Author)

  4. Benchmarking on the management of radioactive waste in the Spanish Nuclear Power; Benchmarking sobre la gestion de residuos radiactivos en las Centrales Nucleares Espanola

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez, M. A.; Gonzalez, R.; Gomez, N.

    2012-07-01

    The main objective of this project is to perform a comparative evaluation of the practices carried out in the field of waste management in the Spanish nuclear power plants. Once compared such practices have been established recommendations that may be of interest for application in other plants.

  5. Comparative study on diets and food consumption of Spanish people; Estudio comparativo sobre dietas y habitos alimentarios en la poblacion espanola

    Energy Technology Data Exchange (ETDEWEB)

    Suanez, A.; Robles, B. [CIEMAT. Madrid (Spain)

    2002-07-01

    When the radiological consequences of the environmental discharges are analysed. It is necessary to take into account several parameters as the values related with the population diets, because food ingestion will be one of the main pathways of radionuclide intake by the human body. With the aim of having current food consumption values, in agreement with the Spanish reality, the CIEMAT has performed a wide study in collaboration with CSN and the Nutritional Department of the Complutense University of Madrid. This work involves people between 0-60 years old, divided in 6 age groups following the ICRP recommendations, with a total sample about 12,000 persons from 10 provinces. The methodology applied is based in three questionnaires and 2 concordance tests. The results obtained in this study are compared with those of several national and international information sources (MAPA, INE and FAO), normally used in dose assessments by ingestion. The results are also compared with the RG 1109 NRC values, widely used for regulatory purposes. (Author) 10 refs.

  6. Electromagnetic fields and safety : information and risk perception in Spanish population; Campos electromagneticos y salud: informacion y percepcion del riesgo en la poblacion espanola

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, A.; Guillen, V.

    2005-07-01

    There is a lack of knowledge about both the information the general population in Spain has on electromagnetic fields (EMF) and the public risk perception regarding the exposure to non-ionizing EMF emitting sources. The aims of the present preliminary survey were to assess what the Spanish population knew about EMF, to explore their health risk perception associated with the exposure to commonly used sources of non-ionizing radiation; and to know their risk perception regarding cell towers. A total number of 801 adult participants, randomly selected answered a telephone interview based on a 13-item semi-structured questionnaire. Sixty-nine per cent of the interviewees reported having no knowledge about electromagnetic fields. Up to 88.9% mentioned to have a little or no information at all on the health effects of EMF. Comparing risk perception regarding several commonly used devices, mobile telephones and microwave ovens were associated with a higher heath risk than TV and computers. Of those who believed that the devices mentioned were linked with health problems, 40.7% associated them with cancer. Regarding base stations, 52.1% of the sample envisioned such sources as a health risk, and of those who believed so, the majority linked the proximity of base stations with cancer. Gender differences were observed in risk perception. (Author) 16 refs.

  7. The role of ENSA in the internationalization of the spanish nuclear industry; La participacion de ENSA en la internacionalizacion de la industria nuclear espanola

    Energy Technology Data Exchange (ETDEWEB)

    Zubimendi, J. M.

    2012-11-01

    Originally born to face the manufacture of the large components for the Spanish nuclear power plants, ENSA is a valid example of internationalization. Mainly based on its high technology and quality as a differential fact, the international success started at the end of the eighties. currently 90% of the manufactured equipment is exported and 50% of the services are performed abroad, ENSA is working for demanding markets as China, France, North America, Taiwan, Argentina, slovenia, Belgium, south Africa, etc. Today, all large equipment being manufactured at ENSA will be exported. (Author)

  8. ALIANZAS ESTRATEGICAS EN LA INTERNACIONALIZACION DE LA EMPRESA FAMILIAR: UN ESTUDIO COMPARATIVO DE LAS BODEGAS VITIVINНCOLAS ESPANOLAS, CHILENAS Y ARGENTINAS

    OpenAIRE

    Fuentes Lombardo, Guadalupe; Vallejo Martos, Manuel Carlos; Garrido Alvarez, Maria Teresa

    2010-01-01

    When examining the different ways in which companies penetrate foreign markets, the decision about using or not strategic alliances may be conditioned by the characteristics of the company. In the specific case of family firms, such alliances offer a series of advantages and disadvantages due to the special characteristics of these companies (Mбrquez-Garcнa et al., 2006). The results of this study show the reasons that prompt family businesses to establish or not strategic alliances in the...

  9. Genetic-Structural relations in some types of spanish uranium deposits; Relaciones genetico-estructurales de algunos tipos de mienralizaciones uraniferas espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Alia Medina, M.

    1962-07-01

    On the spanish hercynian areas there are different types of uraniferous deposits, which may be classified in the following groups: Group I, high temperature magmatic deposits, Group II, low temperature veins and Group III supergenic deposits, generated by weathering of the former ones or by lixiviation of the intra granitic uranium. The deposits belonging to Group I are founding the hercynian ge anticlinal; those of Groups II and III, chiefly in the eugeosyncline. The explanation suggested for these genetic-structural relationships assumes that, in the ge anticlinal, uranium would migrate from the dioritic magmas to form and high temperature deposits. In the eugeosyncline, a large fraction of the uranium would migrate towards more differentiated granites, in which it might partially remain or from which it might have been finally concentrated in the epithermal veins or by later tectonic actions. The Group III deposits ar more frequent in the eugeosyncline, due to the greater abundance of more differentiated intrusive rocks. (Author) 16 refs.

  10. What they have in common the engineering from the Spanish nuclear power plants?; Que tienen en comun las ingenierias de las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Mendez, M.

    2012-11-01

    In recent years, Spain Nuclear Power Plant Engineering have switched their project/task management method to Critical Chain multi-project management, developed by Dr. Goldratt, achieving outstanding results in improving quality and productivity. Multitasking reduction, task and resource synchronizing without the need of exact schedules, implementing a real-time priority information system, relying on the software Concerto, and daily decision making are the basis for the management change that has generated productivity increases of between 20% to 50%, opening new horizons for improvement in other scenarios such as optimizing refueling shutdowns. (Author)

  11. Study on vent containment filtering for the Spanish NPPS systems; Estudio sobre Sistemas de Centeo Filtrado de Contencion para las CCNN Espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Peinado, A.; Serrano, C.; Garcia-Serrano, J. L.

    2013-07-01

    The study discusses filtering systems on the market, and its suppliers, taking into account aspects such as ease of integration into the current plant design, characteristics of the process of filtering, operational range, autonomy of the system, maintenance, qualification and proven experiences, among others. The study, also contains an analysis of sequences kind of accident that serve to define the design parameters of the system.

  12. European Spallation Source ESS. Spanish participation in the ESS Primary system design; Fuente Europea de Spallation ESS. Participacion espanola en el diseno del sistema primario de la ESS

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez, M. T.; Albisu, F.

    2001-07-01

    Neutron scattering provides basic microscopic information on the structure and dynamics of materials which underpins our understanding of condensed matter in fields as diverse as biology, material science chemistry, earth sciences and physics. Europe is preeminent, in this field and the current proposal for a next generation neutron source, the European Spallation source (ESS), will ensure that neutron beams of the highest quality are available early next century to a broad spectrum of users from academia and industry. In the Large Facilities Report to the Commission of the European Community (CEC) in 1990, the Neutron Study Panel underlined the continuing need for neutron scattering and recognised that a major initiative was necessary to secure an effective on-going neutron science programme in Europe for the year 2000 and beyond. (Author)

  13. Participation of CIEMAT in 27th annual meeting of the Spanish Nuclear Safety; Participacion del CIEMAT en la 27 Reunion Anual de la Sociedad Nuclear Espanola

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2002-07-01

    The book assembles the paper of researches of CIEMAT during the 27th annual meeting of Spanish Nuclear society. The paper were presented during the following sessions: 1. Maintenance and in-service inspection 2. Radioactive wastes. 3. Environment 4. R and D management 5. Nuclear Safety. 6. Lifetime. (Author)

  14. Participation of CIEMAT in 26th annual meeting of the Spanish Nuclear Safety; Participacion del CIEMAT en la 26 reunion anual de la Sociedad Nuclear Espanola

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    The book assembles the paper of researches of CIEMAT during the 26th annual meeting of Spanish Nuclear society. The paper were presented during the following sessions: 1. Maintenance and in-service inspection 2. Radioactive wastes 3. Environment 4. R and D management 5. Nuclear Safety 6. Lifetime.

  15. Algorithm Development and Application of High Order Numerical Methods for Shocked and Rapid Changing Solutions

    Science.gov (United States)

    2007-12-06

    high order well-balanced schemes to a class of hyperbolic systems with source terms, Boletin de la Sociedad Espanola de Matematica Aplicada, v34 (2006...schemes to a class of hyperbolic systems with source terms, Boletin de la Sociedad Espanola de Matematica Aplicada, v34 (2006), pp.69-80. 39. Y. Xu and C.-W

  16. Influence of the addition of bentonite clay in poli (butylene adipate co-terephthalic) / poly(lactic acid) membranes; Influencia da adicao de argila bentonita em membranas de poli(butileno adipato co-tereftalico)/poli(Acido latico)

    Energy Technology Data Exchange (ETDEWEB)

    Morais, D.D.S.; Medeiros, K.M.; Araujo, E.M.; Melo, T.J.A. [Universidade Federal de Campina Grande (UAEMa/UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais; Barbosa, R., E-mail: dayannediniz@hotmail.com [Universidade Federal do Piaui (CT/UFPI), PI (Brazil). Centro de Tecnologia

    2014-07-01

    The processes of membrane separation have been used in many different sectors of industrial activity, ranging from the chemical industry, food, pharmaceutical, medical and biotech. In this paper, a bentonite clay was added by melt intercalation in a poly(butylene adipate-co-terephthalic acid)/poly(lactic acid) blend at levels 1 and 3 wt% of clay. After that, membranes were produced by solvent evaporation technique. From the XRD results, it was verified the possible formation of exfoliated/partially exfoliated structures in the membranes. By DSC, it was observed that the addition of clay did not promote alterations in glass transition temperature and crystalline melting of the PBAT/PLA matrix. The morphology of the membranes were observed by SEM and it was verified the clay formation of porous membranes. (author)

  17. Synthesis and characterization of pillared bentonite with Al, AL/Fe and impregnated with Pd; Sintese e caracterizacao de bentonitas pilarizadas com Al, AL/Fe e impregnadas com Pd

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcus Vinicius Costa; Pizarro, Alejandro Herrero; Molina, Carmen Belen, E-mail: marcus.ufpa@yahoo.com.br [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Instituto de Tecnologia. Faculdade de Engenharia Quimica; Seccion de Ingenieria Quimica, Facultad de Ciencias, Universidad Autonoma de Madri (Spain)

    2017-10-01

    In this work, a north american bentonite was pillared with Al and Al/Fe, creating the Al-PILC and Al-Fe-PILC, respectively. Then the Pd was impregnated in the materials, generating Pd-Al-PILC and Pd-Al-Fe-PILC, respectively. The samples were characterized by X-ray diffraction, differential thermal analysis and thermogravimetric and N{sub 2} adsorption at 77 K to determine the specific surface area by BET method (Brunauer - Emmett - Teller). There was an increase in the basal spacing of bentonite from 12.4Å in the original sample to 17.81Å in the Al-Fe-PILC, 17.20Å in Pd-Al-PILC and 17.05Å in the Pd-Al-Fe-PILC. The specific surface area increased from 19.05m{sup 2}/g in the original sample to 173.49m{sup 2}/g in Al-Fe-PILC, 101.31m{sup 2}/g to Pd-Al-PILC and 92m{sup 2}/g in Pd-Al-Fe-PILC. The pillaring process was successful and the synthesized materials have great potential for use as catalysts. (author)

  18. Nanocompósito de poliestireno reciclado, bentonita sódica e hemi-hidrato de sulfato de cálcio: obtenção e caracterização.

    OpenAIRE

    Messias dos Santos Machado

    2016-01-01

    Nesta Tese foram preparados, em solução, filmes híbridos de argila e poliestireno provenientes de copos descartáveis comercializados no mercado brasileiro, com acetato de etila e glicerol. Posteriormente, foi adicionado o Hemi-hidrato de sulfato de cálcio como carga de reforço. Tanto a argila quanto o glicerol, assim como o hemihidrato de sulfato de cálcio, foram utilizados nos percentuais relativos à massa do poliestireno fragmentado correspondendo a 1%,2%, 3%,4%, 5% e 7%. Dos filmes, nos pe...

  19. Influence of natural or organophilic bentonite for flammable of the poly(ethylene-co-vinyl acetate); Influencia da bentonita natural ou organofilica na inflamabilidade do poli(etileno-co-acetato de vinila)

    Energy Technology Data Exchange (ETDEWEB)

    Heyder, Eduardo T.; Kloss, Juliana R.; Morita, Reinaldo Y., E-mail: yomorita1@gmail.com [Universidade Tecnologica Federal do Parana (UTFPR), Curitiba,PR (Brazil). Departamento de Quimica e Biologia; Caetano, Elenice H.; Andrade, Andre Vitor C. de [Universidade Estadual de Ponta Grossa (UEPG), Ponta Grossa, PR (Brazil); Barbosa, Ronilson V. [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Departamento de Quimica

    2015-07-01

    The manufacture polymeric applied in electrical sector in general use additives which act as flame retardants, for example, some borates, phosphates, and halogenated hydroxides. An alternative material for this purpose frequently reported in the literature because the flame resistance or flame retardancy is organoclay. Thus, the objective of this study is to evaluate the flammability of mixtures of EVA/natural bentonite and EVA/organoclay containing modifier as a species free of quaternary ammonium ions. The natural bentonite and organoclay were characterized by X-ray diffraction and scanning electron microscopy and materials were evaluated by X-ray diffraction and the flammability test. Regarding the combustion rate values, there was a reduction of flame propagation in EVA/natural bentonite (3.0%), showing that in this case the clay without modifier acted as a physical barrier and promoted retardant action of flame. (author)

  20. Treatment and characterization of clays (Brasgel and Green Bentonite) for use in zinc removal tests of synthetic effluents; Tratamento e caracterizacao de argilas (Brasgel e Bentonita verde) visando o uso em testes de remocao de zinco de efluentes sinteticos

    Energy Technology Data Exchange (ETDEWEB)

    Patricio, A.C.L.; Silva, M.M. da; Lima, W.S.; Laborde, H.M.; Rodrigues, M.G.F., E-mail: cadigena@hotmail.com [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia Quimica. Centro de Ciencias e Tecnologia

    2011-07-01

    The main objective of this work was to synthesize two organophilic clays starting from the green Bentonite clay and Brasgel in their natural forms and to evaluate the potential in the process of zinc removal of wastewater through a finite bath system. After the treatment process, the clays in the natural and organophilic form were characterized by the techniques of X-ray Diffraction (XRD), Infrared Spectroscopy (IR), in addition, organophilic clays obtained were submitted to the swelling of Foster, aiming to analyze their behavior in certain organic solvents. The analysis of the efficiency of organophilic clays in the Zn{sup +2} removal process was performed in solutions based on a factorial design 2{sup 2} + 3 replicates in the central point, having as analysis variables the pH of the solution (3.0 to 5.0) and the initial concentration of zinc ranging from 10 to 50 ppm.

  1. Study and development of nanocomposites PBT/bentonite clay treated by ionizing radiation: preparation and characterization; Estudo e desenvolvimento de nanocompositos PBT/argila bentonita tratados por radiacao ionizante: preparacao e caracterizacao

    Energy Technology Data Exchange (ETDEWEB)

    Sartori, Mariana do Nascimento

    2014-07-01

    This work describes the preparation and characterization of composites based on poly (butylene terephthalate) - PBT and brazilian modified clay prepared by the melt intercalation. PBT nanocomposites with 3 and 5 % by weight of organically modified clay, by the addition of a quaternary ammonium salt, were prepared by extrusion using a twin-screw extruder machine. After the extrusion process, the materials were injected to obtain specimens tests samples for the characterization tests. Part of the specimens samples were irradiated using an electron beam accelerator with 1.5 MeV at room temperature in the presence of air. Samples of pure PBT and irradiated and non-irradiated nanocomposites were characterized by mechanical tests of tensile, flexural and impact, heat distortion temperature (HDT), X - ray diffraction (XRD), scanning electron microscopy (SEM), melt flow index (MFI) thermogravimetry (TG) and differential scanning calorimetry (DSC) and the correlation between the properties was discussed. The results showed that the addition of clay, in both percentages, promoted an increase greater than 50 % in tensile strength at break and a gain of around 35% in heat distortion temperature when compared to the pure polymer. The treatment with ionizing radiation of electron beam at the doses used in this study showed no significant changes in material properties. (author)

  2. Study of mechanical, rheological and thermal properties of nanocomposite HMSPP (high melt strength polypropylene) with Brazilian bentonite; Estudo das propriedades mecanicas, reologicas e termicas de nanocomposito de HMSPP (polipropileno com alta resistencia do fundido) com uma bentonita brasileira

    Energy Technology Data Exchange (ETDEWEB)

    Fermino, Danilo Marin

    2011-07-01

    This work concerns to the study of the mechanical, thermal and rheological behavior of the nano composite HMSPP - Polypropylene High Melt Strength (obtained at a dose of 12.5 kGy) and a bentonite clay Brazilian Paraiba, known as 'Chocolate' in concentrations of 5 and 10% by weight, comparison of to one American Clay, Cloisite 20A nanocomposite was done. Agent compatibilizer polypropylene-graft, known as maleic anhydride (PP-g-AM) was addict 3% concentration thought technique melt intercalation using a twin-screw extruder and the specimens were prepared by injection process. The mechanical behavior was evaluated by strength, flexural strength and impact tests. The thermal behavior was evaluated by the techniques of differential scanning calorimetry (DSC) and thermogravimetry (TGM). The rheological behavior was evaluated in rheometer. The morphology of the nanocomposites was studied by the technique of scanning electron microscopy (SEM). The organophilic bentonite and the nanocomposites were characterized by X-ray diffraction (XRD) and infrared (FTIR). (author)

  3. Polypropylene/elastomers/organophilic bentonite nanocomposites. Influence of elastomer content on morphology and mechanical properties; Nanocompositos polipropileno/elastomero/bentonita organofilica. Influencia do teor de elastomero na morfologia e propriedades mecanicas

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, K.R.M.; Braga, C.R.C. [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Programa de Pos-Graduacao em Ciencia e Engenharia de Materiais; Andrade, D.L.A.C.S.; Carvalho, L.H.; Silva, S.M.L., E-mail: suedina@dema.ufcg.edu.b [Universidade Federal de Campina Grande (UFCG), PB (Brazil). Unidade Academica de Engenharia de Materiais

    2010-07-01

    In this study, the effect of the elastomer terpolymer ethylene-propylene-diene (EPDM) content on the morphology and mechanical properties of polypropylene PP/EPDM/organophilic bentonite nanocomposite was evaluated. The bentonite, supplied by Bentonit Uniao Nordeste, was purified and organically modified with cetyl trimethyl quaternary ammonium (cetremide) before the incorporation in PP/EPDM blend. The blends with various amounts of EPDM (10, 20, 30 and 40 wt%) and 1 phr of organoclay were prepared by melt-blending at 180 deg C and 50 rpm for 15 min with an internal mixer (Haake). The blends were characterized by X-ray diffraction and mechanical properties (tensile strength). According to the results, we concluded that the content of EPDM affected the morphology and mechanical properties of nanocomposites resulting in improvement in mechanical and morphological properties when a content of 30 wt% of EPDM was used. (author)

  4. Study on the mechanical properties of a HMS-PP nanocomposite with a Brazilian bentonite; Estudo das propriedades mecanicas de um nanocomposito de HMS-PP com uma bentonita brasileira

    Energy Technology Data Exchange (ETDEWEB)

    Fermino, D.M.; Parra, D.F.; Lugao, A.B.; Oliani, W.L., E-mail: mfermino@usp.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Valenzuela-Diaz, F.R. [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica. Dept. de Engenharia Metalurgica e de Materiais

    2010-07-01

    This work concerns to the study of the mechanical behavior of the nanocomposite HMSPP - Polypropylene High Melt Strength (obtained at a dose of 12.5 kGy) and a bentonite clay Brazilian Paraiba (PB), known as 'Chocolate' in concentrations of 5 and 10% by weight, comparison of to one American Clay, cloisite 20A nanocomposite was done. Agent compatibilizer polypropylene-graft, known as maleic anhydride (PP-g-AM) was addict 3% concentration thought technique melt intercalation using a twin-screw extruder and the specimens were prepared by injection process. The mechanical behavior was evaluated by strength, flexural strength and impact tests. The morphology of the nanocomposites was studied by the technique of Scanning Electron Microscopy (SEM), while the organophilic bentonite and nanocomposites were characterized by X-ray diffraction (XRD) and infrared (FTIR). (author)

  5. Morphologic characterization for XRD and TEM of polyamide 6 and 66 nanocomposites with bentonite regional clay;Caracterizacao morfologica por DRX e MET de nanocompositos da poliamida 6 e 66 com argila bentonita regional

    Energy Technology Data Exchange (ETDEWEB)

    Leite, Amanda M.D.; Medeiros, Vanessa da N.; Maia, Larissa F.; Araujo, Edcleide M.; Lira, Helio L., E-mail: amandamelissa.lins@yahoo.com.b [Universidade Federal de Campina Grande (DEMa/UFCG), PB (Brazil). Dept. de Engenharia de Materiais

    2009-07-01

    Polyamide 6 and 66 nanocomposites with clay consisting of silicates layer from Paraiba were produced. The clay was modified being used the quaternary salt of ammonium Cetremide, this so there is a better interaction of the clay with polymeric matrix. The clay without treatment (MMT) and treated clay was evaluated by XRD that showed the insertion of the salt molecules into silicates layer. The nanocomposites were obtained from polyamide 6 and 66 were verified that these presented morphological structure composed of exfoliated/partially exfoliated, analyzed by XRD and TEM. (author)

  6. Eco-innovation an evolution of innovation? Empirical analysis at the Spanish tile ceramic industry; Eco-innovacion, una evolucion de la innovacion? Analisis empirico en la industria ceramica espanola

    Energy Technology Data Exchange (ETDEWEB)

    Segarra-Ona, M.; Peiro-Signes, A.; Miret-Pastor, L.; Albors-Garrigos, J.

    2011-07-01

    Innovation and sustainable development are considered to be economic drivers and crucial in fixing competitive position of companies. Eco-innovation, known as a synergic relation among both concepts must be an element to consider when designing the company's strategy. The objective of this paper is to analyze which are the variables that determine that innovative companies go beyond and consider the improvement of their environmental impact as an output when developing innovating activities. This research considers firms belonging to the Spanish tile industry. Data has been provided by PITEC Database. The paper identifies the moderating factors that influence the eco-innovative behavior of firms. (Author)

  7. Development of database for spent fuel and special waste from the Spanish nuclear power plants; Desarrollo de la base de datos para el combustible gastado y residuos especiales de las centrales nucleares espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Gandal, R.; Rodriguez Gomez, M. A.; Serrano, G.; Lopez Alvarez, G.

    2013-07-01

    GNF Engineering is developing together with ENRESA and with the UNESA participation, the spent fuel and high activity radioactive waste data base of Spanish nuclear power plants. In the article is detailed how this strategic project essential to carry out the CTS (centralized temporary storage) future management and other project which could be emerged is being dealing with, This data base will serve as mechanics of relationship between ENRESA and Spanish NPPS, covering the expected necessary information to deal with mentioned future management of spent fuel and high activity radioactive waste. (Author)

  8. 15 years of Spanish participation in the international projects of R and D coal technology coordinated by OCICARBON; 15 Anos de Participacion Espanola en los foros Internacionales de I+D Tecnologico del Carbon coordinados por OCICARBON

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    As fulfillment of strategy objectives, OCICARBON ( the Spanish Management Association for Coal Research and Development Projects) has maintained a strong link with European and International entities, devoted to coal research and development activities. As consequence of these collaborations, it has been reached uncountable economical and technological benefits, from the projects carried out by Spanish industries and technological entities, under the European Programmes umbrella. In this summary report, it is informed about how the co-ordination of national and international entities, was organised and structured; and the national results, obtained as consequence of the activities carried out by OCICARBON. (Author)

  9. Mechanical characterization of a reduced activation 9 Cr ferritic/martensitic steel of spanish production; Caracterizacion mecanica de un acero ferritico/martenitico de activacion reducida de produccion espanola

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez, D.; Serrano, M.

    2012-07-01

    This paper shows the first results concerning the characterization of two heats of a reduced activation 9 Cr ferritic/martensitic steel (RAFM) made in Spain, called AF1B and AF2A. The results of this characterization are compared with their European counterparts, EUROFER97-2, which was chosen as reference material. All activities described were performed in the Structural Materials Unit of CIEMAT, within the national project TECNO-FUS CONSOLIDER INGENIO.The two Spanish heats have the same production process and heat treatment. Both heats have a similar tensile behaviour similar to EUROFER97-2, but on the other hand impact properties are lower. The microstructure of AF1B reveals large biphasic inclusions that affecting its mechanical properties, especially the impact properties. AF2A casting was free of these inclusions. (Author) 24 refs.

  10. Technology and industrialization in Spanish economy from 1950 to 1960: the patents as technological activity indicators; Tecnologia e industrializacion en la economia espanola de 1950 a 1960: Nueva evidencia a partir de datos de patentes

    Energy Technology Data Exchange (ETDEWEB)

    Hidalgo Nuchera, A.; Molero Zayas, J.; Granda Gayo, I.

    2007-07-01

    The goal of this research is to study the innovative activity developed in the fifties by the Spanish industry focussing on the foreign technology incorporated in the activity of several industrial sectors. The structure of innovation in each sector has been characterized by using patents as technological activity indicators. The data of patents registered in Spain belonging to the 1950-1960 period have been obtained taking into account the research developed by the Department of Business Administration of the Universidad Politecnica de Madrid through a subsidy granted by the Spanish Patent Office. (Author)

  11. Experience the declassification of radioactive waste from Spanish nuclear power plants as an alternative route of administration; Experiencia de la desclasificacion de los residuos radiactivos procedentes de Centrales Nucleares Espanolas como alternativa de via de gestion

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Gomez, M. A.; Gonzalez Crespo, M.

    2011-07-01

    During the operation of the plants generated several slightly contaminated materials that can be managed conventionally by declassification. Declassification activity is incorporated into the Waste Management Plan of each plant considered a {sup g}ood practice{sup .} However experience to date demonstrates that there are difficulties to carry out the practice.

  12. Spanish Network for Isotopes in Precipitation: Isotope Spatial distribution and contribution to the knowledge of the hydrological cycle; La Red Espanola de Vigilancia de Isotopos en la Precipitacion (REVIP): distribucion isotopica espacial y aportacion al conocimiento del ciclo hidrologico

    Energy Technology Data Exchange (ETDEWEB)

    Diaz-Teijeiro, M. F.; Rodriguez-Arevalo, J.; Castano, S.

    2009-07-01

    The results of seven years of operation of the Spanish Network for Isotopes ({sup 2}H, {sup 1}8O y {sup 3}H) in Precipitation (REVIP) are shown. this Network is managed since 2000 by the Centro de Estudios de Tecnicas Aplicadas of the Centro de Estudios y Experimentacion de Obras Publicas (CEDEX) in collaboration with the Agencia Estatal de Meteorologia (AEMET). The results of REVIP are sent to the International Atomic Energy Agency (IAEA) in order to be integrated in the Global Network for Isotopes in Precipitation (GNIP). The spatial distribution of stable isotopes ({sup 1}8O h {sup 2}H) in precipitation in Spain follows a multiple regression model, based on two geographic factors: latitude and elevation, which is strongly correlated with temperature, an important factor controlling isotope fractionation. This information on {sup 1}8O and {sup 2}H is useful to trace surface and ground waters and, combined with the information, about the spatial and temporal distribution of the Tritium ({sup 3}H) concentration in precipitation, allows to date these waters in order to estimate flow directions and velocities, and to evaluate the residence time of water resources and aquifer vulnerability. (Author)

  13. Spanish mining at the entrance of 2010 and its relation to the current environment; La mineria espanola en la entrada del ano 2010 y su relacion con el entorno actual

    Energy Technology Data Exchange (ETDEWEB)

    Espi, J. A.; Sanz Contreras, J. L.

    2010-07-01

    Spanish mining, due to the actual crisis in the global economy, is in a change situation, highlighting the important defeat of minerals associated with the construction activity and the metal mining revival. It is essential to revise its figures, actors and factors for its development and to locate it in the new international framework and about the European Union position. We conclude about improving the knowledge of our mining activity and the true potential of our resources. (Author)

  14. Industrial effluent costs in some Spanish regions and other parts of the EU. Canons and taxes of water treatment; El coste del vertido industrial en varias comunidades autonomas espanolas y en algunos territorios europeos. Los canones y tasas de depuracion

    Energy Technology Data Exchange (ETDEWEB)

    Grau Rahola, J.; Munoz Requena, A.; Ruaix Prat, T.

    2009-07-01

    In this article, the different systems existing in the Spanish regions for paying all the expense related to industrial effluents are examined and compared with the ones in use in other parts of the EU. Also, the degree of fulfillment of the economic objectives of the Water Framework Directives is determined. The findings are quite clear that there is a comparative disadvantage in the sense that some of the regions have not even regulated and instrument to ensure the principle of Who pollutes, pays, there is a widespread unequal treatment for the same type of effluent within Spain and there is clear evidence of a transfer of resources from the industrial use to the domestic one. (Author)

  15. Control and Data Acquisitions System for the spanish Beamline (BM25) at the ESRF; Sistema de Control y Acquisicion de Datos para la Linea Espanola (BN25) del ESRF

    Energy Technology Data Exchange (ETDEWEB)

    Pereira Gonzalez, A.; Olalla Garcia, C.; Sanchez Sanz, J.; Castro, G. R.

    2005-07-01

    A new control and data acquisition system has been developed for BM25 Spanish Line at the ESRF. The system is based in VMEbus, Motorola PreP architecture and Linux Operating System and it's linked to a local ETHERNET network which provides the way of communicate with the servers (PC workstations). In these computers, the data are available for general usage in order to analyze them. The data acquisition consists of many channels connected to the VME crates mainly, independent between them, and fully programmable by drivers, CLUI's and GUI's interfaces, and a set of independent systems (embedded ones, PLCs, others) controlling the security aspects. This report is described in terms of their architecture, their electronic system to the process hard ware and the functionality and the application development facilities they provide using the software and the data acquisition. (Author) 18 refs.

  16. Technology platforms and tools invigorate the economy. situation maritime Spanish Technology Platform; Las plataformas tecnologicas como herramientas dinamizadoras de la economia. Situacion de la plataforma tecnologica maritima espanola (PTME)

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz de Leon Loriga, C.

    2012-07-01

    The Ministry of Industry, Energy and Tourisme and the Ministry of Education and Science, through Fundacion INNOVAMAR, promote and help in 2005 the creation of the Spanish Maritime Technology Platform, (SMTP). Is a forum where all stake holders from the maritime sector define and share a common vision and a Strategic Research Agenda, driving the necessary innovation efforts forward. The Challenges 2020: a competitive maritime industry, safe, sustainable and efficient operations, adaptation of the demand, transversal areas. (Author)

  17. The evolution of energy costs and their effect on the competitiveness of Spanish industry; La evolucion de los costes energeticos y su efecto en la competitividad de la industria espanola

    Energy Technology Data Exchange (ETDEWEB)

    Arocena, P.; Diaz, A. C.

    2015-07-01

    This paper analyzes the role of energy costs in the Spanish manufacturing and its evolution during the period 2000-2010. We carry out a descriptive analysis to firstly, determine the share of energy expenses on total operating expenses and personnel costs, and compare it with that registered in other European countries. Secondly, we analyze the evolution of the energy expenditure in relation to the output value created throughout the decade 2000-2010 and decompose such variation into a price effect and a quantity effect. (Author)

  18. Comparison of the results obtained in the design of shallow foundations when applying the eurocode 7 and the Spanish standards; Comparacion del dimensionamiento de cimentaciones superficiales aplicando el Eurocodigo 7 y las normativas espanolas

    Energy Technology Data Exchange (ETDEWEB)

    Prieto Rodriguez, A.; Varela Nieto, J. M.; Magdaleno Mas, F.; Diaz Balteiro, L.; Saiz de Omenaca Gonzalez, J. A.; Saiz de Omena Gonzalez, J.; Lazaro Benito, F.; Macias Palomo, A.

    2008-07-01

    It has been done the comparison of the results obtained in the design of shallow foundations when the Eurocode 7 and different geotechnical Spanish Standards are applied (R.O.M. 05-94). Guia de cimentaciones para Obras de Carretera y Documento Basico SE-C del Codigo Tecnico de la Edificacion). Several designs have been done with different types of soils, characterized by their strength parameters, and with different shapes of foundations. the comparison of the results makes it possible to quantify the differences that exist between the European and the Spanish Standards. (Author) 8 refs.

  19. The project of the Spanish Nuclear Industry Forum to develop an interactive educational material on Radiological Protection; El Proyecto de Foro de la Industria Nuclear espanola para elaborar un material didactico interactivo sobre Proteccion Radiologica

    Energy Technology Data Exchange (ETDEWEB)

    Real, A.; Cruz, T. de la; Girona, L.; Montesinos, L.; Sanchez, P.

    2012-07-01

    The Training Department of the Spanish Nuclear Industry Forum has undertaken a new project to develop an interactive educational material on Radiological Protection. The objective was to develop an attractive, comprehensive and interactive material, to facilitate students and teachers of Elementary, Middle and High schools, to become familiar with ionising radiations. The novelly of the project, is that based on the European framework of key competencies for file long learning, which are defined as a set of knowledge, skills and altitudes that all individuals need for personal fulfilment and employment. The material presented in this paper, is based in an integrated structure of tasks, activities and exercises, which will facilitate the acquisition of as may key competencies as possible. Besides, the material also includes reference texts, links to pertinent web sites and videos. Students, through the development of a specific task (and related activities and exercises), will learn the differences between ionizing and non ionising radiation, the origin, characteristics and types of types of ionising radiation, how to detect and measure them, the potential detrimental health effects, the principles of radiation protection and the beneficial applications can have for man. The material is freely available in www.rinconeducativo.org. (Author) 4 refs.

  20. The tourist area life cycle: its application to the Spanish Costa del Sol and its environment; El ciclo de vida de un area turistica: su aplicacion a la Costa del Sol espanola y su medio ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Perez, P.L.

    2012-07-01

    The Theory of a Tourism Area Life Cycle, formulated by Richard W. Butler, has seven phases of evolution, which are applied to the tourism destination. In this concept, the location is treated as if it were a living organism. That is to say, it is born, it flourishes, if it develops an illness, it may die or in accordance with its particular reality it may be reborn. This theory may also stipulate the sustainability of a tourism destination, as its carrying capacity, or multiple capacities, may only be analyzed within its position in the cycle. This is the first time the theory has been applied to the Spanish Costa del Sol and it is determined, that this destination does not fit completely in any one phase. Therefore, it is necessary to create its own series, by designating it, as that of pre-stagnation. Also, it is concluded, that, at present, given the distortion between its aquatic environmental carrying capacity, due to the consumption of this resource, by the golf courses and its consequential negative social carrying capacity, it is an unsustainable tourism destination. Though, it does have the capacity to overcome this situation, by recycling the water used for irrigating these courses. (Author)

  1. Patterns of technology diffusion Spanish. An identification through the information contained in patents; Pautas de difusion de la tecnologia espanola. Una identificacion a traves de la informacion contenida en las patentes

    Energy Technology Data Exchange (ETDEWEB)

    Acosta Sero, M.; Coronado Guerrero, D.; Fernandez Perez, A. M.

    2010-07-01

    This paper aims to answer the following research questions: What countries are the geographical destinations of technological knowledge generated by Spanish inventors? What sectors take advantage of the technological knowledge produced in a different sector? What are the characteristics of the patented knowledge more intensively diffused? Our methodology rests on a biblio metric analysis of patent granted by the Patent Office from the US (USPTO) to Spanish inventors. We found some relevant aspects that might be useful to think about technological policy favouring knowledge diffusion. (Author) 27 refs.

  2. Spanish participation in the Benchmark of the OECD of CFDs applied to nuclear safety: the test of Tee Junction; Participacion espanola en el Benchmark de la OCDE de CFDS aplicados a Seguridad Nuclear: el test de la Tee Junction

    Energy Technology Data Exchange (ETDEWEB)

    Abdelaziz Essa, M. A.; Chiva, S.; Munoz-Cobo, J. L.

    2011-07-01

    In this paper we show the main results obtained by the groups of the Universities UPV and UJI (GITH-Inter-Universitary Group on Thermal-Hidraulics), in the modeling of the OCDE Benchmark on the T-Junction performed during the year 2010. This benchmark consisted in predicting, using CFD codes the velocity and temperature distributions downstream the junction. Also was considered a important issue the prediction of the velocity and temperature fluctuations, especially the Power Spectral density of the temperature fluctuations. The results obtained in the Benchmark by the GITH group were very good.

  3. Validez Convergente de la Version Espanola Preliminar del Child Abuse Potential Inventory: Depresion y Aduste Marital (Convergent Validity of the Preliminary Spanish Version of the Child Abuse Potential Inventory: Depression and Marital Adjustment).

    Science.gov (United States)

    Arruabarrena, M. Ignacia; de Paul, Joaquin

    1992-01-01

    "Convergent validity" of preliminary Spanish version of Child Abuse Potential (CAP) Inventory was studied. CAP uses ecological-systemic model of child maltreatment to evaluate individual, family, and social factors facilitating physical child abuse. Depression and marital adjustment were measured in three groups of mothers. Results found…

  4. Participation of CIEMAT in the 29 Annual meeting of the Spanish Nuclear Society. Zaragoza 1,2 y 3 October 2003; Participacion del CIEMAT en la 29 Reunion Anual de la Sociedad Nuclear Espanola

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2003-07-01

    The book assembles the paper of researches of CIEMAT during the 29th annual meeting of Spanish Nuclear Society. The paper were presented during the following sessions : 1. Nuclear fuel. 2. R and D materials. 3.Operation and maintenance. Lifetime. 4.- R and D and T participation and transmutation.5. Environment. 6. Radioactive wastes and dismantling. 7. Nuclear safety. 8. Nuclear law.

  5. Notas sobre los Sonidos Consonantes en Espanol (Notes on Consonant Sounds in Spanish)

    Science.gov (United States)

    Ezquerra, Raimundo

    1974-01-01

    This paper examines the Spanish phonetic system, as set forth by Navarro Tomas in his "Manual de Pronunciacion Espanola," and discusses the influences exerted by certain sounds over others. (Text is in Spanish.) (CK)

  6. JPRS Report, Science & Technology. Europe: Economic Competitiveness

    Science.gov (United States)

    1992-02-24

    its partners, the Spanish companies ENDESA [National Electric Power Enterprise, Inc.], Hidroelectrica Espanola, Sevillana de Electricidade ...Hidroelectrica del Cantabrico, and the Electricidade de Portugal Company, the carbon dioxide emissions from the plant will be reduced by 20 percent, as

  7. 75 FR 72829 - Los Alamos Historical Document Retrieval and Assessment (LAHDRA) Project

    Science.gov (United States)

    2010-11-26

    ..., December 9, 2010. Place: December 8, 2010, Santa Claran Hotel & Casino in Espanola (25 miles north of Santa.... Contact Person for Additional Information: Phillip R. Green, Public Health Advisor, Radiation Studies...

  8. 3D As-Built a documentation of the substation electrical power 400 KV; Documentacion 3D As-Built de una subestacion electrica de 400 KV

    Energy Technology Data Exchange (ETDEWEB)

    Sarti Fernandez, F.

    2011-07-01

    It's getting parameters of time, yields and products obtained, in order to have an objective reference to the possible application of this technique to substations of Red Electrica Espanola (REE).

  9. Morphologic characterization and properties of a nanocomposite matrix of polyvinylpyrrolidone and sodium bentonite for hydrophilic drug controlled release; Caracterizacao morfologica e propriedades de uma matriz de nanocomposito de polivinilpirrolidona e bentonita sodica para potencial uso como matriz para liberacao controlada de farmacos hidrofilicos

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Dario B.R. de; Tavares, Maria I.B.; Iulianelli, Gisele C.V., E-mail: dario@ima.ufrj.br [Universidade Federal do Rio de Janeiro (IMA/UFRJ), Rio de Janeiro, RJ (Brazil). Instituto de Macromoleculas

    2015-07-01

    For several years, research in drug formulation field have been focused in seeking systems that enable a more efficient release of drug and greater time of acting. Aiming to bring numerous benefits to the patient and advantages for the pharmaceutical industry. Leading to greater acceptance and use by society. In this study polymer nanocomposites based on PVP and bentonite clay will be obtained with the drug Metformin, a known hydrophilic hypoglycemiating drug, in order to improve its properties and pharmacokinetics. This mixture will be obtained through spray drying, especially suited for administration of tablets. The characteristics of these materials are being studied by scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). (author)

  10. Experimental study of the transport of HTO, {sup 3}6Cl and {sup 1}37Cs through barriers of bentonite and granite; Estudio experimental del transporte de HTO, {sup 3}6Cl y {sup 1}37Cs a traves de barreras de bentonita y granito

    Energy Technology Data Exchange (ETDEWEB)

    Mingarro, M.; Garcia-Gutierrez, M.; Morejon, J.; Missana, T.; Gil, P.

    2013-07-01

    The evaluation of the behavior of the engineered (bentonite) and natural (granite) barrier of a deep geological repository of high level radioactive waste, needs the knowledge of radionuclide migration and retention processes under conditions as similar as possible to the real ones. In CIEMAT a large-scale experiment has been designed with the objective of studying diffusive transport at the bentonite/granite interface of a geological repository in crystalline rock. The diffusion of three tracers has been analyzed: HTO (as conservative and neural element); Cl (as conservative anionic element) and Cs (as conservative cationic element). It was observed that cesium disappeared very fast from the water deposit, due to its strong retention on bentonite. On the other hand, HTO and Cl, disappeared much slower and could be finally detected in the granite at several centimeters from the original source.

  11. Evaluate the action of polymeric additives in protect and recover water and bentonite clay based drilling fluids contaminated by degradation agents; Analise da acao de aditivos polimericos na protecao e recuperacao de fluidos de perfuracao base agua e bentonita contaminados por sais

    Energy Technology Data Exchange (ETDEWEB)

    Campos, L.F.A.; Ferreira, H.S.; Amorim, L.V.; Franca, K.B.; Ferreira, H.C. [Universidade Federal de Campina Grande (UFCG), PB (Brazil)

    2008-07-01

    The aim of this paper is study influences of electrolytes and cellulose polymers on rheological and water loss properties of dispersions of bentonite compositions. Evaluate the action of degradation additives CaSO{sub 4}, MgCl{sub 2} and CaCl{sub 2} and polymeric additives to protect and recover water and clay based. The results show a negative effect of degradation additives the rheological and water loss properties of drilling fluids. The cellulose polymers can be successfully applied to protect and recover of the rheological properties and water loss of the dispersions contaminated. (author)

  12. Maintenance and improvement of thermal hydraulic system codes using results of OCDE experiments (PKL, Rosa, Atlas) and application to Spanish Nuclear power plants. Camp-Spain project; Mejora y mantenimiento de codigos termohidraulicos de sistema de base a resultados de los experimentos OECD (PKL, ROSA y ATLAS) y su aplicacion a plantas espanolas, proyecto Camp-Espana

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez, M.; Perez, J.; Martorell, S.; Carlos, S.; Villanueva, J. F.; Sanchez, F.; Queral, C.; Rebollo, M. J.; Rivas-Lewicky, J.; Verdu, G.; Gallardo, S.; Miro, R.; Querol, A.; Munoz-Cobo, J. L.; Escriva, A.; Berna, C.; Reventos, F.; Freixa, J.; Martinez, V.

    2016-08-01

    CSN involvement in different international NEA experimental TH programmes has outlined the scope for a new period of CAMP-Espana activities, currently focused on the: -Analysis, simulation and investigation of specific safety aspects of PKL3/OECD and ATLAS/OECD experiments. -Analysis of applicability and/or extension of the results in these projects to the safety, operation or availability of the Spanish nuclear power plants. Both objective are carried out by simulating experiments and plant application with the last available versions of NRC TH codes (RELAP5 or TRACE). A CAMP in kind contribution (NUREG/IA) is aimed as final result of both types of analyses. Five different national research groups (from Technical Universities of Madrid, Valencia and Cataluna) ate carrying out the development of these activities. (Author)

  13. Thermal energy consumption and carbon dioxide emissions in ceramic tile manufacture - Analysis of the Spanish and Brazilian industries; Consumo de energia termica y emisiones de dioxido de carbono en la fabricacion de baldosas ceramicas Analisis de las industrias Espanola y Brasilena

    Energy Technology Data Exchange (ETDEWEB)

    Monfort, E.; Mezquita, A.; Vaquer, E.; Mallol, G.; Alves, H. J.; Boschi, A. O.

    2012-11-01

    Spain and Brazil are two of the world's biggest ceramic tile producers. The tile manufacturing process consumes a great quantity of thermal energy that, in these two countries, is mainly obtained from natural gas combustion, which entails CO{sub 2} emission, a greenhouse gas. This study presents a comparative analysis of the thermal energy consumption and CO{sub 2} emissions in the ceramic tile manufacturing process in Spain and Brazil, in terms of the different production technologies and different products made. The energy consumption and CO{sub 2} emissions in ceramic tile manufacture by the wet process are very similar in both countries. In the dry process used in Brazil, less thermal energy is consumed and less CO{sub 2} is emitted than in the wet process, but it is a process that is only used in manufacturing one particular type of product, which exhibits certain technical limitations. While in Spain the use of cogeneration systems in spray-dryers improves significantly the global energy efficiency. The average energy consumption in the different process stages, in both countries, lies within the range indicated in the Reference Document on Best Available Techniques in the Ceramic Manufacturing Industry (BREF of the Ceramic Manufacturing Industry) of the European Union. (Author) 14 refs.

  14. [The use of acetylsalicylic acid in patients with ischemic cardiomyopathy cared for in Spanish emergency services (results of the EVICURE Study). Evaluacion del Manejo de la cardiopatia isquemica en los Servicios de Urgencias Hospitalarios of the Sociedad Espanola de Medicina de Urgencias y Emergencias (SEMES)].

    Science.gov (United States)

    Epelde, F; Garca-Castrillo Riesgo, L; Loma-Osorio, A; Verdier, J; Recuerda Martnez, E

    2000-10-14

    Acetyl salicylic acid is a drug with demonstrated effectiveness in ischemic cardiomyopathy. The objective of our study was to know the use of this drug in the emergency services of Spain. The EVICURE study analyzes the use of acetyl salicylic acid in 35 emergency services of Spanish hospitals. 2,168 patients were studied. Of the 473 patients with stable angina, 9.2% received acetyl salicylic acid before going to the hospital and 90,7% at the arrival to the hospital, of 1,067 with unstable angina 13% received acetyl salicylic acid before the arrival to the hospital and 56% at the arrival to the hospital. Of 600 patients affected of myocardial infarction only 17% received acetyl salicylic acid before the arrival to the hospital and 59.8% received this drug in the emergency room. The use of acetyl salicylic acid in patients affected of ischemic cardiopathy assisted in the emergency services of Spain is improperly low.

  15. Accumulative effects of regulatory actions. Exercise of analysis of CER, consideration of the cumulative Effects of regulation in the rulemaking process in Spanish NPP; Efectos acumulativos de la ccion reguladora. ejercicio de analisis del CER, Consideration of the cummulative Effects of Regulation in the rulemaking process en una central espanola

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Ayestaran, P.; Castella, L.

    2014-02-01

    Through its interaction with the American industry, the NRC has been aware for a number of years of the concern about the impact of the accumulative effect of some regulatory actions. In response to this concern, which was highlighted by the industry, the NRC has carried out initiative to review a number of regulatory requirements order to ensure that NRC regulation and practices dno not lead to an unnecessary regulatory load. The foregoing was in response to what has become commonly known as the CER. Cumulative Effects of Regulation in the Rulemaking Process. In view of the regulatory actuation by the Spanish Nuclear Safety Council (CSN) and, in particular after the events which occurred in Japan, a pilot study has been carried out to examine the CER on a Spanish plant in order to analyse the cumulative effects of regulation and to propose improvements to the management of regulation in line with that set our by the NRC in various documents (SECY-02-081, SECY-11-0032 among others). (Authors)

  16. Is it necessary to adopt measures in occupational radiological protection in Spanish NORM industries devoted to the processing of minerals and raw materials; Es necesario adoptar medidas de proteccion radiologica ocupacionales en algunas industrias NORM espanolas dedicadas al procesdado de minerales o materias primas?

    Energy Technology Data Exchange (ETDEWEB)

    Garcia-Tenorio, R.; Bolivar, J. P.

    2010-07-01

    In this work it is documented why is quite limited the number os Spanish NORM industries devoted to the processing of minerals and/or raw materials where it is necessary to adopt occupational radiological protection countermeasures. These countermeasures are coincident in some cases with OHS countermeasures historically applied in the affected industries and in most cases can be only needed in working situations associated with maintenance operations. (Author) 6 refs.

  17. Special Report: Conflicting Data on Spanish Intransitive Verbs in Two Leading Dictionaries.

    Science.gov (United States)

    Teschner, Richard V.; Flemming, Jennifer

    1996-01-01

    Presents a conflation of and a comparison between the 1,646 verbs the Royal Academy's "Diccionario de la lengua espanola" (Dictionary of the Spanish Language) classifies as solely or partly intransitive and the 1,382 verbs that are so classified by the "Pequeno Larousse ilustrado" (Illustrated Larousse Small Dictionary).…

  18. The Social Significance and Value Dimension of Current Mexican American Dialectal Spanish. A Glossary for the Human Service Professions. Part II.

    Science.gov (United States)

    Gomez, Ernesto; Cerda, Gilberto

    Results of a study documenting the Mexican American's unique Spanish dialectal expressions used in the barrios of San Antonio, Texas, and its surrounding areas are presented. The expressions included are those which were not recorded in the "Diccionario de la Real Academia Espanola" (19th Edition) or which were recorded therein but with…

  19. "Sometimes I Am Spanish and Sometimes Not": A Study of the Identity and Integration of Spanish Muslim Women

    Science.gov (United States)

    Sibai, Salam Adlbi

    2010-01-01

    This article reports part of a wider investigation which is still being developed and analyzes in depth the lives of female university students who are both Spanish and Muslim. The first part of this research was published in the "Revista Espanola de Educacion Comparada," where the results of the study in Madrid are presented. Here, the…

  20. ISSN 2073-9990 East Cent. Afr. J. surg. (Online)

    African Journals Online (AJOL)

    dell

    Cirugia Espanola 1999;66( Suppl 1):233. 16. David GG, Al-Sarira AA, Willmott S et al. Management of acute gallbladder disease in. England. British Journal Of Surgery 2008; 95: 472-476. 17. David W. Rattner, Charles Ferguson, Andrew L. Warshaw et al. Factors associated with. Successful Laparoscopic Cholecystectomy ...

  1. Spanish Bilateral Initiatives for Education in Latin America

    Science.gov (United States)

    Cortina, Regina; Sanchez, Maria Teresa

    2007-01-01

    The research presented in this article concerns la Agencia Espanola de Cooperacion Internacional (Spanish Agency for International Cooperation--AECI) and its growing presence in Latin America since the late 1990s. The aim is to evaluate the transformative potential that bilateral funding can have on educational reform in the region. The article…

  2. EXPANDING HORIZONS FOR MUSIC THERAPY--COMPENSATORY EDUCATION FOR THE CULTURALLY HANDICAPPED.

    Science.gov (United States)

    MICHEL, DONALD E.

    THE PURPOSE OF THIS STUDY WAS TO DETERMINE THE EFFECTS OF LIVE MUSIC PERFORMANCES UPON ECONOMICALLY AND CULTURALLY DISADVANTAGED CHILDREN. TO EFFECT THE STUDY, A SERIES OF SCHOOL CONCERTS BY OUTSIDE PROFESSIONAL PERFORMERS WAS PRESENTED TO STUDENT AUDIENCES IN DISADVANTAGED SCHOOLS IN THE ESPANOLA VALLEY AND SANTA FE, NEW MEXICO. EVALUATION…

  3. A Bibliography of Shift Work Research: 1950-1982

    Science.gov (United States)

    1983-09-01

    Circadian Rhythm and Some p Psychic Functions in a Group of State Railway Workers. Bulletno di Psicologia Aplicata, 103-105:79-91, 1971. 181. Caymax, L...Physiopathological Effects of the Maladjusted Hourly Schedules in Air Travel Personnel of Civil Aviation). Revista Clinica Espanola, 119:517-524i

  4. Identification and Evaluation of Submerged Anomalies, Mobile Harbor, Alabama.

    Science.gov (United States)

    1984-10-01

    nuuDnru ENEEEMA~hE 1.011,._ I .ll 5 n. MiCROCOPY RESOLUTION TESI CHART N41,. 1 AI LAI -J LU ca LU VII. CONCLUSIONS AND RECOMMENDATIONS Anomaly Summary... Arquitectura Naval Espanola. Madrid. Aten, Lawrence E. 1983 Indians of the Upper Texas Coast. Academic Press, New York. Barrett, F. S. 1864 Report of

  5. Reference Aid: Glossary of Acronyms, Abbreviations, and Special Terms Used in the Western Europe Romance-Language Press.

    Science.gov (United States)

    1977-11-25

    Internazionale Alliance (Ita) AAJEPT Associacao de Jornalistas e Escritores Portugueses do Turismo ABC Arme Blindee et Cavalerie Association...Orientacion de Orientation of SE Secretaria de Estado SEAT Sociedad Espanola de Automoviles de Turismo , S.A. SEC Systeme Europeen de

  6. In-core fuel management for Cofrentes NPP

    International Nuclear Information System (INIS)

    Marco, M.

    1990-01-01

    Hidroelectrica Espanola has established an in-house nuclear analysis capability in Hidrola's Servicio de Ingenieria y Analisis Nucleares (SIAN). This article describes SIAN, its origins, resources, codes, and its work related to the company's 100%-owned Cofrentes NPP. 1 fig., 2 tabs

  7. The image of Algeria in the writings of Francisco Zavala, a Spanish journalist in Algeria during the 19th century

    Directory of Open Access Journals (Sweden)

    Hayet Guenoun

    2009-03-01

    Full Text Available Los Espanoles eran la comunidad Europea la mas numerosa que habia emigrado a Argelia visto a la dura situacion que atraveso Espana a lo largo del siglo xix. Una serie de crisis socio-economicas,politicas favoricio la emigracion de los campesiones,obreros en paro,refugiados politicos hacia Argelia. Segun algunos autores,los Espanoles formaban una comunidad cerrada a la influencia Frances y guardaban su personalidad y su modo de vivir espanol. Entre los defensores de la comunidad Espanola en Argelia , el Espanol Francisco Zavala periodista refugiado en Argelia en 1879.Al llegar a argelia fue director de la sociedad amistad Espanola en argel,cuya preocupacion era crear actividades culturales tipicamente espanolas . El patuet periodico fundado por aquella asociacion cuyo director fue zavala entre 1882-1883. En 1883 Zavala creo la fraternidad obrera hasta 1884, y en 1887 Zavala marcho a Oran donde continuo la publicacion de la Fraternidad hasta 1888 ano de su expulsion del territorio Argelino por las autoridades Francesas. Antes de su expulsion,Zavala publico su obra:La Bandera Espanola en Argelia,es una obra que resume toda la historia de la presencia Espanola en Argelia desde 1505 hasta 1792 su preocupacion iba mas de 1792 pues relata hechos posteriores a dicho ano tocando la colonizacion Francesa .El titulo de la obra (la bandera Espanola en Argelia pone en evidencia la importancia de la presencia Espanola en Africa del norte y specificamente en Argelia Zavala luchaba por medio de la Fraternidad para mejorar la situacion de los Espanoles residentes en argelia . defendia sus derechos morales y materiales y luchaba contra la difamacion que eran victimas .y en la Bandera Espanola en Argelia se preocupaba mas bien de la civilizacion y de la historia. Zavala a traves de su obra quiere ensenar la historia de la presencia Espanola en Argelia a los hijos de los Epanoles nacidos en Argelia para que segun el sepan que tienen los mismos derechos que los

  8. Reparación de un dique seco en el Ferrol/España

    Directory of Open Access Journals (Sweden)

    Navas Gutiérrez, Mariano

    1981-06-01

    Full Text Available El dique seco de El Ferrol, construido como dique de gravedad según la técnica de la época (1913, ha sufrido una serie de averías como consecuencia de su envejecimiento, que ha obligado a emprender una obra de reparación según las modernas técnicas de soleras ancladas y drenadas, y pantallas de bentonita-cemento. Se ha construido una losa de 30 cm en el antedique, anclada con armaduras activas, formado cada anclaje por diez cables según una malla de 3 x 3 m. Para aliviar la subpresión se ha colocado un dren entre la solera permeable actualmente existente y la losa. Con la pantalla de bentonita-cemento se pretende cerrar la entrada de agua por el relleno permeable del antiguo dique. El terreno natural es prácticamente impermeable.

  9. Influencia de la formulación de la arena en verde en su difusividad térmica y su efecto en una pieza colada

    Directory of Open Access Journals (Sweden)

    Noguez, M. E.

    2005-12-01

    Full Text Available Data evidencing a relation among green sand formulations (% water/% bentonite, w/b, in the ranks 0.2-0.55 for 6, 7, 8 and 9 % bentonite, their heat transfer behaviour, specifically their thermal diffusivity, the casting solidification rate and the resulting macrostructures in aluminium castings are presented.

    Se presentan evidencias de que la formulación de una arena en verde (relación entre los porcentajes de agua y de bentonita, a/b, en el rango 0,2-0,55 para 6, 7, 8 y 9 % de bentonita parece determinar su transferencia de calor y, por tanto, su coeficiente de difusividad térmica, lo que influye en la rapidez de solidificación y en las macroestructuras de piezas coladas en aluminio.

  10. Caracterização estrutural de argilas bentoníticas nacional e importada: antes e após o processo de organofilização para utilização como nanocargas Structural characterization of Brazilian and imported bentonitic clays: before and after the process of organophilization for utilization as nanofiller

    Directory of Open Access Journals (Sweden)

    I. F. Leite

    2008-09-01

    Full Text Available Foi utilizada uma bentonita natural codificada como ASCN oriunda da Bentonit União Nordeste, PB sob forma de pó com granulometria inferior a 0,074 µm. A bentonita ASCN foi modificada organicamente através de troca iônica com o sal brometo de cetil trimetil amônio Cetremide e denominada ASCM. Para obter bentonitas organofílicas, inicialmente, dispersões aquosas de bentonita/sal Cetremide foram mantidas sob agitação mecânica constante a aproximadamente 80 °C por 30 min. Em seguida o sistema foi mantido em repouso por 24 h, sendo então lavado e filtrados os insumos. Por fim os materiais foram secos a 60 °C e então desagregados e passados em malha 200 para serem caracterizados. Como parâmetro de comparação foi utilizada uma bentonita importada organofílica Cloisite 30 B (Southern Clay Products, Texas, EUA. Ambas argilas foram caracterizadas estruturalmente por análise química, capacidade de troca de cátions, espectroscopia no infravermelho (FTIR, difração de raios X e análise termogravimétrica. A análise química mostrou a presença de óxidos característicos da estrutura do aluminossilicato e eventual redução na maioria dos óxidos metálicos quando as bentonitas foram organofilizadas, ASCM e Cloisite 30B, característico do processo de troca dos cátions metálicos por moléculas do sal orgânico. Mediante os espectros de FTIR verifica-se a presença de bandas características das moléculas do sal nas bentonitas e através da análise de difração de raios X observa-se um aumento no espaçamento basal pela inserção das cadeias do sal entre as lamelas da bentonita, confirmando assim a obtenção de bentonitas organofílicas. A curva termogravimétrica das bentonitas organofílicas indicou que a bentonita Cloisite 30 B apresentou-se mais estável termicamente que a bentonita ASCM.A natural bentonite coded as ASCN supplied by Bentonit União Nordeste from Paraíba, Brazil in powder form with particle size smaller

  11. Comportamiento geoquímico de barreras arcillosas: transformaciones hidrotermales en esmectitas alumínicas

    Directory of Open Access Journals (Sweden)

    Cuadros, F. J.

    1993-08-01

    Full Text Available The use of bentonite barriers in radiactive waste repositories is conditioned by its transformation into illite, due to the influence of temperature and solutions in the canister vicinity. This reaction is known in burial diagenesis and hydrothermal alterations, but its mechanism is not yet well stablished. A preliminary study on spanish bentonites shows that important variations exist in the chemical solutions in contact with bentonites in a hydrothermal environment.El uso de bentonitas como barrera en almacenamientos de residuos radiactivos viene condicionado por su posible transformación en ilita debido a la influencia de la temperatura y de las soluciones cercanas al contenedor. Esta reacción se conoce en zonas de diagénesis de enterramiento y en áreas hidrotermales, pero su mecanismo no está todavía bien establecido. En un estudio preliminar realizado sobre bentonitas españolas se ha encontrado que existen variaciones importantes en el quimismo de las soluciones en contacto con bentonitas en ambiente hidrotermal.

  12. Estudo do comportamento e caracterização de argilas bentoníticas após processo de liofilização

    Directory of Open Access Journals (Sweden)

    M. C. P. Machado

    Full Text Available Resumo Bentonita é um tipo de argila composta principalmente de montmorilonita. Possui excelentes propriedades de adsorção e como principais características a alta capacidade de troca catiônica, capacidade de inchamento, grande área superficial e baixa condutividade hidráulica. A bentonita é utilizada como matéria-prima em mais de 40 aplicações industriais. O processo de liofilização consiste na secagem de um produto, passando pela etapa de sublimação, para remoção da água contida utilizando baixa pressão e impedindo qualquer atividade biológica e reações químicas. Ele é eficiente em características como contração do produto, perda de voláteis, decomposição térmica, ações enzimáticas e desnaturação de proteínas, se comparado com outros meios de desidratação, ou seja, mantém a integridade do produto. Neste trabalho, foi avaliado o comportamento e realizada a caracterização de bentonita sódica mais ativa e sódica menos ativa, antes e após o processo de liofilização. Considerou-se como mais ativa a bentonita que apresentou maior capacidade de troca catiônica - CTC relacionada aos íons sódio (Na+. Foram feitas análises químicas e mineralógicas, de capacidade de troca catiônica, análise microbiológica, FTIR e capacidade de inchamento. Observou-se um incremento de aproximadamente 32% na capacidade de inchamento da bentonita mais ativa após a liofilização.

  13. Total Quality Management (TQM) Bibliography

    Science.gov (United States)

    1990-04-01

    IMPROVEMENT OF QUALITY EVOLUTION SYSTEM EOR INGROUND STORAGE TANKS. IABSE Symposium Tokyo 1986: Safety and Quality Assurance of Civil Engineering Structures...World of Limited Resources, 27th Annual Conference Proceedings, European Organization for Quality Control, Publ by AECC ( Asociacion Espanola para el...MOTIVATION/QUALITY CONTROL. 49. 353. Seltz-Petrash, Ann E. WORKERS AS MANAGERS BOOST PRODUCTIVITY. Civil Engineering (New York); Oct 1980; v50 nl0 p121

  14. ¿Como Conseguir que Crezcan la Productividad y el Empleo, y Disminuya el Desequilibrio Exterior?

    OpenAIRE

    Rafael Domenech; Juan Ramon Garcia Lopez

    2010-01-01

    Tras la crisis economica iniciada en 2008, el declive economico de sectores como el de la inversion residencial ha puesto de manifiesto que la economia espanola necesita reorientar su actividad productiva hacia sectores con mayor potencial de crecimiento futuro y de creacion de empleo, como aquellos orientados a la demanda exterior. Este cambio exige acelerar la implementacion de politicas economicas que incentiven la demanda de empleo, la competitividad de las empresas, su internacionalizaci...

  15. Geothermal Potential on Kirtland Air Force Base Lands, Bernalillo County, New Mexico.

    Science.gov (United States)

    1981-10-01

    The ends of the basin are open through narrow bedrock constrictions to the San Marcial (Socorro) Basin to the south and the Espanola Basin to the...itijolt art i f 𔃻 :1,/ tfhat I .series of shall1ower wellIs, t hOaqh prodacin’! fs- ki I ,f !’:t, I -- t very i nexi crisi ye methodl to meet the

  16. Radical and Ethnic Differences in Breast Cancer Risk Factors

    Science.gov (United States)

    2001-07-01

    and Varela, G. Estudio caso-control de la relacion dieta y cancer de mama en una muestra procedente de tres poblaciones hospitaliarias espanolas...Differences in Breast Cancer Risk Factors PRINCIPAL INVESTIGATOR: Esther M. John, Ph.D. CONTRACTING ORGANIZATION: Northern California Cancer Center Union...Organization: Northern California Cancer Center Those portions of the technical data contained in this report marked as limited rights data shall not

  17. Effect of zirconia addition on the fatigue behaviour of fine grained ...

    Indian Academy of Sciences (India)

    Unknown

    Paris 4 838. Guiu F 1978 J. Mater. Sci. 13 1957. Guiu F and Vaughan D A J 1986 Proc. advanced ceramics. (eds) J S Moya and S de Aza (Madrid, Spain: Sociedad. Espanola de ceramica Y Vidrio). Guiu F, Reece M J D and Vaughan A J 1991 J. Mater. Sci. 26 p 3275. Hillig W B 1962 Modern aspects of the vitreous state (ed.) ...

  18. Influencia de la nanoarcilla en la resistencia al envejecimiento y a la acción del agua de las mezclas asfálticas

    OpenAIRE

    López Montero, Teresa; Crucho, João; Miró Recasens, José Rodrigo; Picado-Santos, Luís

    2017-01-01

    Los pavimentos asfálticos durante su vida de servicio se ven expuestos a los esfuerzos provocados por el tráfico, además de a las condiciones climáticas, lo cual provoca una reducción de su vida útil. Por este motivo, resulta interesante el uso de nanomateriales que mejoren el comportamiento de las mezclas asfálticas. El objetivo de este trabajo es estudiar la influencia del uso de un ligante modificado con nanoarcilla, tipo bentonita hidrofílica, en la resistencia a tracción indirecta de una...

  19. Modelación del módulo de la resistencia a la flexión de un material compuesto cementicio a partir de propiedades en estado fresco

    OpenAIRE

    Fernando Toro; Marisol Gordillo; Silvio Delvasto; Jr Holmer Savastano

    2014-01-01

    En la presente investigación se estudió la relación entre las propiedades del estado fresco y el estado endurecido de un material compuesto formado por una matriz de cemento Pórtland reforzado con fibra de fique dispuestas al azar, las propiedades evaluadas en estado fresco fueron: ondulabilidad, fluidez, drenabilidad y en estado endurecido el módulo de la resistencia a la flexión. Las muestras se prepararon con diferentes materias primas (Fibra de fique, Bentonita, Pulpa, Humo de Sílice y Ac...

  20. Cost Analysis and Effectiveness of Using the Indoor Simulated Marksmanship Trainer (ISMT) for United States Marine Corps (USMC) Marksmanship Training

    Science.gov (United States)

    2011-06-01

    start_page.do Historia de la infanteria de Marina Espanola: Spanish Marines. Translation: History of the Spanish Marines. In Revista Naval: Naval Review...progenitors of the current Infantería de Marina Corp (“ Historia ,” n.d.). Many people would argue that the one hallmark of the Marine Corps is that every...Viejas del Mar de Nápoles (Naples Sea Old Companies) to the Escuadras de Galeras Del Mediterráneo (Mediterranean Galley Squadrons) in 1537

  1. Reviews of recent publications

    Directory of Open Access Journals (Sweden)

    2002-06-01

    Full Text Available Avelar, Idelber. The Untimely Present: Post-Dictatorial Latin American Fiction and the Task of Mourning by Herbert J. Brant Bertharion, Jacques-Denis. Poetique de Georges Perec by Warren Motte Cascardi, Anthony J. Consequences of Enlightenment by Holger Briel Cloonan, William. The Writing of War: French and German Fiction and World War II by Damon Rarick Holloway, Vance R. El Posmodernismo y otras tendencias de la novela espanola (1967-1995 by Nancy Vosburg O'Neill, Patrick. Gunter Grass Revisited by Stuart Taberner Smorkaloff, Pamela Maria. Cuban Writers On and Off the Island: Contemporary Narrative Fiction by Teresa R. Arrington

  2. A study on the piston ring wear in automotive engine Seat 1500 CA by means of radioactive tracer technique; Estudio del desgaste de segmentos en motor Seat 1500 CA mediante trazadores radiactivos

    Energy Technology Data Exchange (ETDEWEB)

    Val Cob, M. del; Chul, Y.; Fuentes Figuera de Vargas, J.

    1971-07-01

    The iron side wear in the chromium-plated top compression ring has been a matter of interest for the engine makers and it has been required by them to investigate the wear characteristics of the chromium-plated piston ring. Meanwhile, Bureau of Nuclear Energy in Spain (Junta de Energia Nuclear) and Seat Car Manufacturing Company (Sociedad Espanola de Automoviles de Turismo) agreed to study the wear characteristics of chromium-plated piston ring of type CA gasoline engine for Seat 1500 car by means of radioactive tracer technique. (Author) 9 refs.

  3. Optimization of compressive strength in admixture-reinforced cement-based grouts

    Directory of Open Access Journals (Sweden)

    Sahin Zaimoglu, A.

    2007-12-01

    Full Text Available The Taguchi method was used in this study to optimize the unconfined (7-, 14- and 28-day compressive strength of cement-based grouts with bentonite, fly ash and silica fume admixtures. The experiments were designed using an L16 orthogonal array in which the three factors considered were bentonite (0%, 0.5%, 1.0% and 3%, fly ash (10%, 20%, 30% and 40% and silica fume (0%, 5%, 10% and 20% content. The experimental results, which were analyzed by ANOVA and the Taguchi method, showed that fly ash and silica fume content play a significant role in unconfined compressive strength. The optimum conditions were found to be: 0% bentonite, 10% fly ash, 20% silica fume and 28 days of curing time. The maximum unconfined compressive strength reached under the above optimum conditions was 17.1 MPa.En el presente trabajo se ha intentado optimizar, mediante el método de Taguchi, las resistencias a compresión (a las edades de 7, 14 y 28 días de lechadas de cemento reforzadas con bentonita, cenizas volantes y humo de sílice. Se diseñaron los experimentos de acuerdo con un arreglo ortogonal tipo L16 en el que se contemplaban tres factores: la bentonita (0, 0,5, 1 y 3%, las cenizas volantes (10, 20, 30 y 40% y el humo de sílice (0, 5, 10 y 20% (porcentajes en peso del sólido. Los datos obtenidos se analizaron con mediante ANOVA y el método de Taguchi. De acuerdo con los resultados experimentales, el contenido tanto de cenizas volantes como de humo de sílice desempeña un papel significativo en la resistencia a compresión. Por otra parte, las condiciones óptimas que se han identificado son: 0% bentonita, 10% cenizas volantes, 20% humo de sílice y 28 días de tiempo de curado. La resistencia a compresión máxima conseguida en las anteriores condiciones era de 17,1 MPa.

  4. Enzimas de função hepática na aflatoxicose aguda experimental em frangos de corte Hepatic enzimes function in experimental acute enzimes aflatoxicosis in broilers

    Directory of Open Access Journals (Sweden)

    Adriana Borsa

    1998-12-01

    Full Text Available Com o objetivo de avaliar a função hepática de aves experimentalmente intoxicadas por aflatoxina, com e sem uso de bentonita sódica, foram utilizados 40 (quarenta frangos de corte, machos, linhagem Ross, divididos em 4 (quatro grupos de 10 (dez. animais, sendo que cada grupo foi submetido a um tratamento: T1 - controle (ração sem aflatoxina ou bentonita, T2 - ração com 5ppm de aflatoxina, T3 - ração com 5ppm de aflatoxina e 0,5% de bentonita sódica e T4 - ração com 0,5% de bentonita sódica. Todos estes tratamentos foram aplicados do 1° ao 42 ° dia de vida das aves. Aos 21, 35 e 42 dias de idade, foram analisados os níveis séricos das enzimas aspartato aminotransferase (AST, alanina aminotransferase (ALT, lactato desidrogenase (LDH e gama glutamiltransferase (GGT, A análise da variância mostrou que houve interação entre os tratamentos e datas de colheita de material, para as seguintes variáveis: AST, LDH e GGT. Para estas, foi aplicado o teste de Tukey, comparando-se as médias de cada tratamento em cada data. Observou-se que as enzimas AST, ALT e GGT não apresentaram diferenças significativas entre tratamentos, porém, nos tratamentos l e 2, a AST apresentou um aumento linear (pThe aim ofthis study is to evaluate ïhe hepatic function of experimentally intoxicated broilers by aflatoxin with and without sodium bentonite. Forty Ross mole broilers, were used divided into 4 groups of 10 birds, and such groups have been submitted to the following treatments: T1- control (feed without aflatoxin or sodium bentonite, T2- feed containing 5ppm of aflatoxin, T3- feed containing 5ppm of aflatoxin and 0.5% of sodium bentonite and T4- feed containing 0.5% of sodium bentonite. Ali these treatments have been appiied from the l st to the 42nd day of lif e. On the days 21, 35 and 42, the serum leveis of the enzimes aspartate aminotransferase (AST, alanino aminotransferase (ALT, lactate dehydrogenase (LDH and gamma glutamiltransferase (GGT

  5. Organobentonita como sustituto de negro de carbono en formulaciones de caucho

    Directory of Open Access Journals (Sweden)

    López Manchado, M. A.

    2004-04-01

    Full Text Available Rubber compounds based on natural rubber reinforced with ammonium salt modified bentonite have been prepared and characterized. It pretends to evaluate the possibility of using these white fillers as substitute of carbon black in natural rubber compounds. Vulcametric curves show that the organoclay and carbon black accelerate the vulcanization reaction and, furthermore, give rise to a marked increase in the torque. However, it is of interest to point out that these effects are more marked in the case of the organoclay. In addition, the mechanical characterization show the strong reinforcing effect of both fillers, but this effect is newly more sensible when the organoclay is added to the NR. It is worthy to note that the mechanical properties of 10% organoclay-NR nanocomposite are comparable to the 40 phr carbon black filled compound.

    Se han preparado y caracterizado nanocomposites de caucho natural reforzados con bentonita modificada orgánicamente con una sal de amonio. Se pretende evaluar la posibilidad de utilizar estas cargas claras como sustitutos del negro de carbono en las formulaciones de caucho natural. Las curvas de vulcanización muestran que tanto la bentonita organofilizada como el negro de carbono aceleran la reacción de vulcanización y además, dan lugar a un considerable incremento en el torque. No obstante, es interesante destacar que estos efectos son más marcados en el caso de la organobentonita. Por su parte, la caracterización mecánica muestra el fuerte efecto reforzante de ambas cargas, si bien este efecto es nuevamente más acusado en presencia de la organobentonita. Es importante señalar que las propiedades mecánicas del nanocomposite reforzado con 10 partes de organobentonita son similares a las del composite con 40 partes de negro de carbono.

  6. Radiotherapy evolution in Spain (1896-1996)

    International Nuclear Information System (INIS)

    Casas i Duran, F.

    1996-01-01

    We show radiotherapy evolution in Spain, from the introduction of the Roentgenology till the consolidation of the radiation therapy. We analyze the development of the roentgenology and the contribution of the dermatologist in it. We should emphasize the importance of the V International Congress of Electrology and Medical Radiology wich took place in December of 1910 in Barcelona in the development of the deep radiotherapy in the treatment of gynecological neoplasms. The sanitary struggle campaigns cancer influenced a lot the development of Spanish radiotherapy. the development of the Cancer's Pavilion of the ''Hospital de la Santa Creu i Sant Pau'' was the most important radiotherapic event in the previous period to the Spanish civil war. After the late introduction of cobaltotherapy in Spain, the birth of the ''Asociacion Espanola de Radioterapia y Oncologia (AERO) helped to consolidate the speciality. (Author) 36 refs

  7. Micro-and ultrafiltration as a tertiary treatment for re-using urban wastewater; Ultrafiltracion y microfiltracion como tratamiento terciario para reutilizacion de agua residual urbana

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigo Alonso, J.C.; Alonso Alvarez, E.; Paredes Alba, J.A.

    1998-06-01

    This article follows on from the one published in September 1997 (Tecnologia del Agua v. 168). It describes the experiments conducted by INFILCO ESPANOLA, S.A. at a pilot plant employing continuous micro-and ultrafiltration for re-using urban waste water. The project was carried out at the Centa Experimental Plant in the San Jeronimo sewage plant in the province of Seville, Spain. The microfiltration membranes, with pores of 0.2{mu} m and a unit surface of 15 m``2, were of the deadend type and made of polypropylene hollow fibre. The ultrafiltration membranes, with a MVVCO of 50,000 Daltons and a unit surface of 23.2 m``2, were of the cross-flow type and made of water-absorbing polyolefin. (Author)

  8. Tutoria universitaria y servicios de orientacion: Dos realidades en un mismo contexto

    Directory of Open Access Journals (Sweden)

    Javier Pérez Cusó

    2015-01-01

    Full Text Available La orientacion del alumnado universitario se ha convertido en los ultimos anos tanto en un elemento de calidad como en un derecho refrendado por el propio Estatuto del Estudiante Universitario. En la universidad espanola conviven diferentes modos de dar respuesta a las necesidades de informacion, apoyo y orientacion: por un lado los servicios de orientacion y por otro la tutoria. Este trabajo busca profundizar en la informacion de la que disponen y la utilizacion que realizan los estudiantes en torno a estos dos modos de organizar la orientacion universitaria. Los resultados sugieren la necesidad de un mayor esfuerzo de planificacion, coordinacion e integracion, asi como de difusion de las diferentes acciones de orientacion realizadas.

  9. Procedimientos de selección de personal en pequeñas y medianas empresas españolas

    Directory of Open Access Journals (Sweden)

    Pamela Alonso

    2015-01-01

    Full Text Available Este estudio analiza el grado de uso de los diferentes instrumentos de selección en las pequenas y media- ˜ nas empresas (PYME espanolas. Los resultados encontrados muestran que el CV, las referencias y la ˜ entrevista sin estructura son empleados por la mayoría de las empresas tanto medianas como pequenas. ˜ Estos instrumentos no son los mejores en términos de sus propiedades psicométricas. Los resultados también indican que otros instrumentos con buenas o excelentes propiedades psicométricas, como los tests de habilidades cognitivas, las medidas de personalidad, las entrevistas estructuradas y las pruebas profesionales, son empleados por un porcentaje cada vez mayor de empresas. Por último, se comentan las implicaciones que estos resultados tienen para la práctica profesional y se ofrecen sugerencias para futuras investigaciones.

  10. Viability report for the ByWater Lakes project

    Energy Technology Data Exchange (ETDEWEB)

    Lowry, Thomas Stephen [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Klise, Geoffrey Taylor [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Passell, Howard David [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Peplinski, William J. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2013-10-01

    This report presents the results from the hydrological, ecological, and renewable energy assessments conducted by Sandia National Laboratories at the ByWater Lakes site in Espanola, New Mexico for ByWater Recreation LLC and Avanyu Energy Services through the New Mexico small business assistance (NMSBA) program. Sandia's role was to assess the viability and provide perspective for enhancing the site to take advantage of renewable energy resources, improve and sustain the natural systems, develop a profitable operation, and provide an asset for the local community. Integral to this work was the identification the pertinent data and data gaps as well as making general observations about the potential issues and concerns that may arise from further developing the site. This report is informational only with no consideration with regards to the business feasibility of the various options that ByWater and Avanyu may be pursuing.

  11. Technology monitoring in the CIEMAT

    International Nuclear Information System (INIS)

    Perez-Martinez, M.; Cuesta, M. J.; Crespi, S. N.; Cabrera, J. A.

    2008-01-01

    The CIEMAT Foresight and Technology Monitoring Unit focuses its activities on obtaining strategic information on future developments in the area of energy and environment that can be used for decision making by the centers management. In addition, it provides services to CIEMAT researchers and other external customers. In May 2007, the Asociacion Espanola de Normalizacion y Certificacion AENOR delivered to the CIEMAT the first Technology Monitoring System certificate granted in Spain as per standard UNE 166006:2006. This article describes the Units experience in the implementation process of the Technology Monitoring System and provides several examples of the way in which the Unit graphically represents the information analyzed in its Technology Monitoring Reports. (Author)

  12. Nuclear energy in Spain

    International Nuclear Information System (INIS)

    Isla, M.

    1984-01-01

    The 'Plan Energetico Nacional de 1983' (1983 National Energy Program)(PEN-83) was approved recently by the Spanish Government and presented to the 'Cortes Espanolas' (Spanish Parliament) in May 1984. The PEN-83 is being discussed at present in the Parliament and it is possible that some modifications be introduced, but expectedly will be rather limited and minor. PEN-83 covers the period 1983-1992. It includes a comparative analysis of the evolution and situation in OECD countries and in Spain. In Spain the offer, supply and consumption of primary energy and of the interrelation with other economic indicators, such as the gross domestic product, inflation rate and unemployment compared with that of the industrialized OECD countries, has shown a much lower capability to adapt its structure to the energy price increases

  13. [Analysis of the continuity, circulation and productivity of the Revista Española de Quimioterapia].

    Science.gov (United States)

    Gimeno Sieres, E

    2007-06-01

    The primary objective of this study was to compare some of the bibliometric indicators of the continuity, circulation and productivity of the Revista Espanola de Quimioterapia up to 2003 with other spanish journals of Pharmacy and Pharmacology. This was done by reviewing periodicals directories, such as the ISSN (International Standard Serial Number/Número Internacional Normalizado de Publicaciones Seriadas) and ULRICH'S (Periodicals Directory), as well as the CDU (Classification Universal Decimal), national and international databases including IME (Indice Médico Español), ICYT (Indice Espanol de Ciencia y Tecnologia), IPA (International Pharmaceutical Abstracts), SCI Expanded (Science Citation Index Expanded), MEDLINE (Index Medicus), EMBASE (Excerpta Medica), BIOSIS PREVIEWS, ANALYTICAL ABSTRACTS, FSTA (Food Science and Technology Abstracts), SCIFINDER SCHOLAR and CHEMISTRY CITATION INDEX. According to the results, the Revista Española de Quimioterapia, in publication for 15 years, is widely distributed and has a good rating among other scientific journals of the same discipline.

  14. Vandellos-2: third generation of NPPs becomes reality

    International Nuclear Information System (INIS)

    Camps, M.; Vallejo, J.M.

    1988-01-01

    When Vandellos-2 was officially declared in operation (March 3, 1988), the third generation of nuclear power plants became a reality in Spain. Located in Tarragona province on the Mediterranian coast, Vandellos-2 has demonstrated the value of developing working partnership among all participants in building a country's nuclear program. Vandellos-2 was planned and built by the Asociacion Nuclear Vandellos (ANV), comprising the utilities ENDESA (72 %) and Hidroelectrica Espanola (28 %). The unit has a 2785 MWth three-loop Westinghouse PWR feeding a Westinghouse turbine-generator with a gross power of 982 MWe. To obtain a competitive nuclear cost per kWh for the completed plant, ANV has carefully controlled all aspects of the project as well as monitoring hardware and construction costs. ANV's success in keeping the project on schedule was aided by Spanish industry's 25 years of experience in nuclear construction. 2 tabs

  15. Assessment of the turbine trip transient in Cofrentes NPP with TRAC-BF1

    International Nuclear Information System (INIS)

    Castrillo, F.; Gomez, A.; Gallego, I.

    1993-06-01

    This report presents the results of the assessment of TRAC-BF1 (G1-J1) code with the model of C. N. Cofrentes for simulation of the transient originated by the manual trip of the main turbine. C. N. Cofrentes is a General Electric designed BWR/6 plant, with a nominal core thermal power of 2894 Mwt, in commercial operation since 1985, owned and operated by Hidroelectrica Espanola, S. A. The plant incorporates all the characteristics of BWR/6 reactors, with two turbine driven FW pumps. As a result of this assessment a model of C. N. Cofrentes has been developed for TRAC-BF1 that fairly reproduces operational transient behavior of the plant. A special purpose code was generated to obtain reactivity coefficients, as required by TRAC-BF1, from the 3D simulator

  16. 110 years of Avipoxvirus in the Galapagos Islands.

    Science.gov (United States)

    Parker, Patricia G; Buckles, Elizabeth L; Farrington, Heather; Petren, Kenneth; Whiteman, Noah K; Ricklefs, Robert E; Bollmer, Jennifer L; Jiménez-Uzcátegui, Gustavo

    2011-01-13

    The role of disease in regulating populations is controversial, partly owing to the absence of good disease records in historic wildlife populations. We examined birds collected in the Galapagos Islands between 1891 and 1906 that are currently held at the California Academy of Sciences and the Zoologisches Staatssammlung Muenchen, including 3973 specimens representing species from two well-studied families of endemic passerine birds: finches and mockingbirds. Beginning with samples collected in 1899, we observed cutaneous lesions consistent with Avipoxvirus on 226 (6.3%) specimens. Histopathology and viral genotyping of 59 candidate tissue samples from six islands showed that 21 (35.6%) were positive for Avipoxvirus, while alternative diagnoses for some of those testing negative by both methods were feather follicle cysts, non-specific dermatitis, or post mortem fungal colonization. Positive specimens were significantly nonrandomly distributed among islands both for mockingbirds (San Cristobal vs. Espanola, Santa Fe and Santa Cruz) and for finches (San Cristobal and Isabela vs. Santa Cruz and Floreana), and overall highly significantly distributed toward islands that were inhabited by humans (San Cristobal, Isabela, Floreana) vs. uninhabited at the time of collection (Santa Cruz, Santa Fe, Espanola), with only one positive individual on an uninhabited island. Eleven of the positive specimens sequenced successfully were identical at four diagnostic sites to the two canarypox variants previously described in contemporary Galapagos passerines. We conclude that this virus was introduced late in 1890's and was dispersed among islands by a variety of mechanisms, including regular human movements among colonized islands. At present, this disease represents an ongoing threat to the birds on the Galapagos Islands.

  17. 110 years of Avipoxvirus in the Galapagos Islands.

    Directory of Open Access Journals (Sweden)

    Patricia G Parker

    Full Text Available The role of disease in regulating populations is controversial, partly owing to the absence of good disease records in historic wildlife populations. We examined birds collected in the Galapagos Islands between 1891 and 1906 that are currently held at the California Academy of Sciences and the Zoologisches Staatssammlung Muenchen, including 3973 specimens representing species from two well-studied families of endemic passerine birds: finches and mockingbirds. Beginning with samples collected in 1899, we observed cutaneous lesions consistent with Avipoxvirus on 226 (6.3% specimens. Histopathology and viral genotyping of 59 candidate tissue samples from six islands showed that 21 (35.6% were positive for Avipoxvirus, while alternative diagnoses for some of those testing negative by both methods were feather follicle cysts, non-specific dermatitis, or post mortem fungal colonization. Positive specimens were significantly nonrandomly distributed among islands both for mockingbirds (San Cristobal vs. Espanola, Santa Fe and Santa Cruz and for finches (San Cristobal and Isabela vs. Santa Cruz and Floreana, and overall highly significantly distributed toward islands that were inhabited by humans (San Cristobal, Isabela, Floreana vs. uninhabited at the time of collection (Santa Cruz, Santa Fe, Espanola, with only one positive individual on an uninhabited island. Eleven of the positive specimens sequenced successfully were identical at four diagnostic sites to the two canarypox variants previously described in contemporary Galapagos passerines. We conclude that this virus was introduced late in 1890's and was dispersed among islands by a variety of mechanisms, including regular human movements among colonized islands. At present, this disease represents an ongoing threat to the birds on the Galapagos Islands.

  18. Estudio cinético del proceso de digestión anaerobia de las aguas residuales de la elaboración de aceitunas de mesa negras

    Directory of Open Access Journals (Sweden)

    Borja Padilla, R.

    1992-12-01

    Full Text Available A kinetic study of the anaerobic digestion process of wastewaters from black olive preparation was carried out. The bioreactors used accommodated various suspended micronized clay supports of different chemical composition (Sepiolite and Bentonite. Assuming that the overall anaerobic digestion process conforms to a first-order kinetics, experimental data pairs, namely the methane volume yielded (G and the time (t fitted the equation: G=Gm·[1-exp (-Ko·t], the rate coefficient, Ko, was determined in each of the situations studied. The support used has a marked influence on the kinetic constant of the process; the Sepiolite support yields significantly the highest values. The average Ko values, obtained in the rank of COD between 0 and 1 g/L were: 1,83 days-1 (Sepiolite and 1,23 days-1 (Bentonite. For values of COD greater than 1g/L, the specific rate constant decreased when the volume of wastewater added or substrate concentration was increased. The yield coefficients of methane, Yp/s, were 333 and 316 mL CH4/g COD for the Sepiolite and Bentonite reactor, respectively. Treatment yields of COD were above 95% in all the cases.

    Se ha efectuado un estudio cinético del proceso de digestión anaerobia de las aguas residuales obtenidas en la elaboración de aceitunas negras, mediante biorreactores que contienen en suspensión soportes micronizados de tipo arcilloso de distinta composición química (Sepiolita y Bentonita. Admitiendo que globalmente el proceso de digestión anaerobia sigue una cinética de primer orden, se ajustan las parejas de datos experimentales, volumen de metano acumulado (G, tiempo (t a la ecuación: G=Gm·[1-exp (-Ko·t], determinándose los valores del coeficiente de velocidad Ko, para cada caso estudiado. El soporte utilizado ejerce una influencia acusada sobre la constante cinética del proceso

  19. Avaliação da integridade e da retenção de metais pesados em materiais estabilizados por solidificação Assessment of integrity and retention of heavy metals in materials stabilized by solidification

    Directory of Open Access Journals (Sweden)

    André Luiz Fiquene de Brito

    2009-03-01

    Full Text Available A quantidade de resíduos sólidos industriais tem aumentado significativamente em decorrência da industrialização, e o seu gerenciamento adequado é necessário para reduzir o impacto ao meio ambiente e aos ecossistemas. Neste trabalho, foram avaliadas a integridade e a retenção de metais pesados em materiais estabilizados por solidificação. Foi adotado o planejamento completamente aleatorizado com um único fator, ou seja, foram comparadas as médias de quatro tratamentos (A, B, C e D com 0, 40, 50 e 60% respectivamente de contaminantes e três repetições. Cimento Portland comum, bentonita sódica e hidróxido de cálcio foram usados para estabilizar por solidificação o resíduo sólido sintético contendo óxido de Cd2+, Pb2+ e Cu2+. Pode-se concluir que os tratamentos influenciaram no resultado de lixiviação do cádmio, chumbo e cobre. Os tratamentos mostraram que as concentrações do extrato solubilizado e lixiviado aumentam em função da quantidade de cádmio, chumbo e cobre adicionada. O maior valor encontrado foi para o material proveniente do tratamento D, que apresentou lixiviação igual a 32,815 mg.kg-1 para o cádmio e 29,769 mg.kg-1 para o chumbo. Para os ensaios de integridade/durabilidade, constatou-se que o aumento da absorção de água fez com que a resistência à compressão diminuísse. O uso de cimento, de hidróxido de cálcio e de bentonita sódica se mostrou ideal para retenção de metais pesados, evitando a sua lixiviação e a solubilização para o meio ambiente.As the quantity of hazardous industrial wastes increases significantly owing to rapid industrialization, its appropriate management is required to reduce adverse impacts on humans and ecosystems. This work evaluated the integrity and retention of heavy metals in materials stabilized by solidification. It was adopted a completely randomized design with a single factor, that is, the averages of four treatments were compared (A, B, C and D with 0

  20. Análise da influência do tratamento de purificação no comportamento de inchamento de argilas organofílicas em meios não aquosos Analysis of the influence of the purification treatment on the swelling behavior in non-aqueous media of organophilic clays

    Directory of Open Access Journals (Sweden)

    H. S. Ferreira

    2008-03-01

    Full Text Available As argilas bentonitas possuem importantes funções em fluidos de perfuração não aquosos. No entanto, impurezas presentes na argila e a escolha inadequada do sal quaternário utilizado no seu processo de organofilização podem comprometer a compatibilidade do sistema argila-fluido. Assim, este trabalho tem por objetivo analisar a influência do tratamento de purificação e dos sais quaternários de amônio no comportamento de inchamento de argilas organofílicas em meios não aquosos. A argila bentonita foi purificada através de procedimento de sedimentação e as argilas organofílicas foram preparadas utilizando-se cloreto de alquil benzil amônio (Dodigen, cloreto de diestearil dimetil amônio (Praepagen, cloreto de cetil trimetil amônio (Genamim e brometo de cetil trimetil amônio (Cetremide. As argilas organofilizadas foram caracterizadas por difração de raios X e determinação da distribuição do tamanho de partículas e, em seguida, submetidas ao ensaio de inchamento de Foster em éster, parafina e óleo diesel. Os resultados mostram que o processo de purificação foi eficiente na redução de impurezas presentes na bentonita e que a argila organofílica purificada tratada com Praepagen e Genamim apresenta valores de inchamento de Foster em éster, óleo diesel e parafina superiores aos obtidos com argilas organofílicas sem purificação (natural e comercial.Bentonite clays play important roles in oil based drilling fluids. However, clay impurities and the wrong choose of the quaternary ammonium salt used in the organophilization process can lead to organoclay-fluid low interactions. Thus, this work has as aim study the influence of the purification process and quaternary ammonium salts on the swelling behavior in oil media of organophilic clays. The bentonite clay was purified using a sedimentation process and organoclay were prepared using alkyl dimethyl benzyl ammonium chloride (Dodigen, distearyl dimethyl ammonium

  1. Uso de argila organofílica na compatibilização de misturas PP/EPDM The use of an organoclay on the compatibilization of PP/EPDM Blends

    Directory of Open Access Journals (Sweden)

    Kaline R. M. Ferreira

    2011-01-01

    Full Text Available Misturas PP/EPDM com variadas razões PP:EPDM, não compatibilizadas e compatibilizadas com o polipropileno modificado com anidrido maleico (PP-g-MA, foram preparadas por fusão. A influência da adição de 1 pcr de uma argila bentonita na morfologia, propriedades mecânicas e reológicas destas misturas foi avaliada. A bentonita empregada como carga, proveniente da Bentonit União Nordeste/PB foi purificada e modificada organicamente com tecnologia desenvolvida por nosso grupo de pesquisa, antes de ser adicionada às misturas. Os dados de difratometria de raios X mostraram que, para diferentes razões de PP:EPDM na mistura a incorporação de 1 pcr de argila organofílica resultou na formação de nanocompósitos intercalados desordenados (20 ou 40% de EPDM ou intercalados/esfoliados (10 e 30% EPDM. A incorporação da argila organofílica provocou alterações nas propriedades morfológicas, mecânicas e reológicas das misturas, especialmente daquelas preparadas com 30% em massa de EPDM onde a ação compatibilizante da argila foi observada.PP/EPDM blends with different PP:EPDM ratios, non-compatibilized and compatibilized with maleic anhydride grafted polypropylene (PP-g-MA were prepared by melting. The influence of 1 phr bentonite clay addition on the morphology, mechanical and rheological properties of these blends was evaluated. The bentonite used as a filler, provided by Bentonit União Nordeste/PB, was purified and organically modified with a technology developed by our research group, before being added to the blends. X-ray diffraction results showed that, for blends having different PP:EPDM ratios, 1 phr organoclay addition led to the formation of intercalated (20 or 40% EPDM or intercalated/exfoliated (10 and 30% EPDM nanocomposites. The morphological, mechanical and rheological properties of the blends were modified by organoclay addition, especially for those with 30 wt% of EPDM, where a compatibilizing effect of the organoclay

  2. Desempenho de sementes peletizadas de alface em função do material cimentante e da temperatura de secagem dos péletes

    Directory of Open Access Journals (Sweden)

    Silva João Bosco C.

    2002-01-01

    Full Text Available Sementes de alface da cultivar Grand Rapids Nacional foram peletizadas, utilizando-se como material de enchimento, a mistura de microcelulose e areia fina em volumes iguais e, como material cimentante, diferentes volumes de suspensão aquosa de bentonita e de acetato de polivinila, em cinco proporções (%: 100+0; 75+25; 50+50; 25+75; e 0+100. Os cimentantes foram aplicados em separado, sendo a bentonita aplicada na primeira camada de recobrimento das sementes. Após a peletização, as sementes foram submetidas à secagem sob temperaturas de 15 e 36degreesC, e avaliadas quanto à germinação e emergência das plântulas. As combinações de cimentantes utilizadas na peletização e a temperatura de secagem não afetaram significativamente a porcentagem final de germinação das sementes em gerbox. Na avaliação da emergência de plântulas em bandejas, apenas duas formulações de péletes apresentaram menor taxa em relação ao tratamento com desempenho máximo, indicando que as diferenças obtidas não foram devidas às diferenças na formulação do recobrimento e nem à temperatura de secagem. Independentemente da temperatura de secagem, todas as formulações utilizadas na peletização causaram redução na velocidade de germinação. Entretanto, quando semeadas em substrato orgânico e cultivadas em casa de vegetação, as sementes revestidas com várias formulações apresentaram índices de velocidade de emergência semelhantes aos das sementes não peletizadas. Neste ambiente, as plântulas oriundas de sementes peletizadas apresentaram crescimento normal, sem diferenças significativas com a testemunha, em relação à produção de matéria seca da parte aérea e das raízes, avaliadas aos 20 dias após a semeadura.

  3. Estudio cinegético de la digestión anaerobia de alpechín, procedente de la extracción de aceite utilizando olivex, previamente biotratado con Geotrichum Candidum

    Directory of Open Access Journals (Sweden)

    González Becerra, A.

    1992-08-01

    Full Text Available A kinetic study of the anaerobic digestion of olive mill wastewater (OMW which was obtained with the technological helper "Olivex", was carried out. An identical wastewater, obtained without this enzyme was also used. Both OMW were pre-treated aerobically with Geotrichum Candidum to eliminate the greater part of the phenolic compounds responsible for inhibition. The anaerobic process was carried out in bioreactors with microorganisms immobilized on two micronized clay supports, Sepiolite and Bentonite. Assuming that the overall anaerobic digestion process conforms to a first-order kinetic, specific rate constants, Ko, were obtained by using the Roediger's equation in each case. In contrast to what takes place with both OMW without pretreatment, kinetic constant was observed virtually constant when the substrate concentration was increased, in the range of COD (chemical oxygen demand studied. The mean value of this kinetic parameter was a 40% larger for the OMW obtained with Olivex compared to the reference OMW, in the two digesters used. Sepiolite favoured the kinetic and increased the yield coefficient compared to Bentonite.Se ha efectuado un estudio cinético del proceso de digestión anaerobia de un alpechín obtenido con el coadyuvante tecnológico "Olivex" en comparación con un testigo obtenido sin este enzima, que previamente han sido tratados de forma aerobia con Geotrichum Candidum para eliminar la mayor parte de los compuestos fenólicos responsables de su poder inhibidor. El proceso anaerobio se ha realizado en biorreactores con microorganismos inmovilizados en dos soportes micronizados arcillosos, Sepiolita y Bentonita. Admitiendo que globalmente el proceso de digestión anaerobia sigue una cinética de primer orden, se obtienen las constantes específicas de velocidad, Ko, para cada caso estudiado usando la ecuación de Roediger. A diferencia de lo que ocurre con ambos alpechines sin pretratar, la constante cinética se mantiene pr

  4. Physicochemical and biological characterization of the Roble river, Upper Cauca, western Colombia Caracterización fisicoquímica y biológica del río Roble, Alto Cauca, occidente de Colombia

    Directory of Open Access Journals (Sweden)

    Carlos A. García-Alzate

    2010-06-01

    Full Text Available To determine dial and seasonal differences as well as productivity and the trophic status of the lower Roble river, a tributary of the Vieja and upper Cauca rivers of west Colombia, we sampled phytoplankton, zooplankton, fish and macroinvertebrates and recorded physicochemical variables (dissolved oxygen, percent oxygen saturation, pH, conductivity, relative humidity, environmental, water, maximum and minimum temperatures, width, depth, current velocity, substrate, CO2, COD, BOD, total calcium and magnesium hardness, total, dissolved and suspended solids, alkalinity, acidity, chlorine and turbidity during the wet and dry seasons. Most physicochemical variables such as relative humidity, dissolved oxygen and percent oxygen saturation showed low coefficients of variation, except for oxygen deficit. The Shannon-Wiener diversity index, equity and dominance had low values around 0.5. We recorded eight orders, 28 families and 58 genera of macroinvertebrates, three divisions, five orders and 45 genera of phytoplankton, two divisions and six genera of zooplankton and 19 species of fishes. This river has an allochthonous-heterotrophic trophic state and productivity is oligotrophic but with a tendency to eutrophication.Para determinar las diferencias diarias y estaciónales, así como la productividad y el estado trófico del río Roble, un afluente de la Vieja, alto Cauca al occidente de Colombia, tomamos muestras de fitoplancton, zooplancton, peces y macroinvertebrados y registramos variables físico-químicas (oxígeno disuelto, porcentaje de saturación de oxígeno, pH, conductividad, humedad relativa, temperaturas ambiente, del agua, máximas y mínimas, ancho, profundidad, velocidad de la corriente, sustrato, CO2, DQO, DBO5, dureza total, dureza calcica y durezas magnesicas, sólidos totales, disueltos y suspendidos, alcalinidad , acidez, cloruros y turbidez durante sequía y lluvias. La mayoría de las variables físico-químicas tales como la

  5. The Person Centered approach in Gerontology: New validity evidence of the Staff Assessment Person-directed Care Questionnaire

    Directory of Open Access Journals (Sweden)

    Teresa Martínez

    2016-01-01

    Full Text Available Antecedentes/Objetivos La atención centrada en la persona es un enfoque innovador que busca mejorar la calidad asistencial de los servicios para personas mayores que precisan cuidados. Ante el creciente interés hacia este enfoque es necesario contar con instrumentos de medida que permitan evaluar en qué grado los servicios gerontológicos llevan a cabo una atención centrada en la persona. El objetivo de este trabajo es la adaptación y validación del Staff Assessment Person-directed Care (PDC en población espanola. ˜ Método Se llevó a cabo la traducción y adaptación del PDC al espanol ˜ y se aplicó a una muestra de 1.339 profesionales de atención directa, pertenecientes a 56 residencias para personas mayores. El estudio de las propiedades psicométricas se realizó desde el marco de la Teoría Clásica de los Tests y los modelos de Teoría de Respuesta a los Ítems. Resultados El coeficiente alfa de Cronbach fue de 0,97 y el coeficiente de fiabilidad test-retest de 0,89. La Función de Información indica que la prueba mide de forma precisa para un amplio rango de puntuaciones (valores entre -2 y + 2. La estructura factorial del PDC es esencialmente unidimensional, confirmándose la existencia de dos grandes dimensiones que se articulan a su vez en ocho factores muy correlacionados. En cuanto a la validez predictiva destacan las correlaciones del PDC con el The Person-centered Care Assessment Tool (r= 0,68, con el clima organizacional (r = 0,67 y con los factores del burnout, agotamiento emocional (r= -0,41 y realización personal (r = 0,46. Conclusiones La versión espanola ˜ del PDC confirma los resultados encontrados en otras poblaciones, presentando unas excelentes propiedades psicométricas para su uso en la evaluación de residencias de personas mayores, tanto con fines profesionales como de investigación.

  6. Evaluation of long-term behavior of concretes in high level waste repositories. An accelerated leaching test

    Directory of Open Access Journals (Sweden)

    Hidalgo, A.

    2004-04-01

    Full Text Available The present work describes an accelerated leaching method that with a rapid process allows to develop and evaluate cements for use in a nuclear disposal, and the understanding of the long term effects. The method has been developed to study the stability of cementitious materials in contact with bentonite, to be used in high level radioactivity waste repositories. Nitric acid has been selected to simulate in an accelerated way the pH decreasing produced when concrete is in contact with groundwaters.

    El presente trabajo describe un ensayo acelerado de lixiviación, que mediante un proceso rápido, permite desarrollar y evaluar cementos para su uso en instalaciones nucleares, y la comprensión de su comportamiento a largo plazo. El método se ha desarrollado para estudiar la estabilidad de materiales de base cemento, en contacto con bentonita, que serán utilizados en almacenamientos de resíduos radiactivos de alta actividad. Como agente lixiviante se seleccionó el ácido nítrico, con objeto de simular de forma acelerada, la disminución del pH que se produce cuando el hormigón entra en contacto con aguas subterráneas.

  7. Influência da adição e da modificação química de uma carga mineral nanoparticulada nas propriedades mecânicas e no envelhecimento térmico de compósitos poliuretano/sisal Influence of a nanoparticulate mineral filler addition and chemical modification of the mechanical properties and thermal aging of PU/Sisal composites

    Directory of Open Access Journals (Sweden)

    Maria Roberta O. Pinto

    2005-11-01

    Full Text Available Este trabalho trata do efeito da hibridização do reforço, através da adição de uma carga mineral (bentonita nanoparticulada, no desempenho mecânico de compósitos poliuretano/sisal contendo 25% em massa de fibras de sisal e moldados por compressão. As propriedades mecânicas, de tração e impacto, dos sistemas compósitos estudados foram avaliadas em função do teor (0-10% em massa e de modificações químicas da carga mineral. Os efeitos do envelhecimento térmico nas propriedades tênseis (sigma, E, épsilon de compósitos selecionados também foram investigados. O reforço mineral (Bentonita sódica Brasgel-PA foi empregado em quatro formas, a saber: a como fornecido (sem tratamento, b tratado com ácido clorídrico (0,6N, c modificado com cloreto de dodecil dimetil benzil amônio (Dodigen e d modificado com brometo de cetil trimetil amônio (Cetremide. Os resultados indicam que a incorporação da bentonita eleva as propriedades mecânicas dos compósitos e que melhores propriedades foram obtidas quando a bentonita foi tratada com o ácido clorídrico. O envelhecimento térmico em tempos curtos (até 4 dias provocou elevação no módulo elástico e resistência na ruptura dos compósitos, o que foi atribuído à pós-cura da matriz. Em tempos longos (32 dias a exposição térmica causou decréscimo nas propriedades tênseis (sigma, E, épsilon dos compósitos investigados, o que foi atribuído à degradação oxidativa da matriz e dos reforços. O compósito mais resistente ao envelhecimento térmico foi o híbrido cuja carga mineral foi organofilizada com o sal Cetremide. Anáslies por DRX e MEV indicam que a estrutura dos compósitos híbridos é um misto de micro e nanocompósito.This work deals with filler hybridization effects, by the addition of a nanoparticulate mineral filler (bentonite, on the mechanical performance of compression molded Polyurethane/sisal composites with 25 wt % fiber content. Composite tensile and

  8. Dosimetry by means of external dose rate measurements in patients undergoing 131I thyroid cancer theraphy; Dosimetria de pacientes con cancer diferenciado de tiroides en tratamiento de terapia metabolica con 131I a partir de medidas de tasa de dosis externa

    Energy Technology Data Exchange (ETDEWEB)

    Ruiz, M.A.; Ferrer, N.; Cordoba, D.; Alonso, L.; Sastre, J.M.; Arranz, L.

    2010-07-01

    Dosimetry in patients treated with radiopharmaceuticals needs to be carried out for each individual treatment. No standardized procedure is currently available. In our study, the dosimetry for each individual treatment has been calculated using the dose protocol of the Sociedad Espanola de Fisica Medica for the treatment of thyroid cancer with 131I. This protocol is currently under review, since it proposes a procedure which only uses the daily external dose rate measurements during the patient hospital stay and an external dose rate measurement performed 7-9 days after the activity administration. The results obtained seem to be consistent with those found by other authors following different procedures. Moreover, this protocol has proved to be very useful to verify the values of doses established for red marrow are not exceeded. The maximum activity that can be administered in later treatments could also be assessed with this procedure. Additionally, the activity in urine, which cannot be measured directly, was determined. The potential dose which any patients relative or any person staying close to the patient might receive during the treatment was determined as well. These results make it possible to establish more realistic criteria regarding radiation protection. (Author).

  9. Analysis of the soil amplification factor in NCSE-02 and Eurocode-8 regulations: application to the 11{sup t}h May , 2011 Lorca earthquake; Analisis del efecto de amplificacion sismica por suelos en las normativas NCSE-02 y Eurocodigo 8: aplicacion al terremoto de Lorca del 11 de Mayo de 2011

    Energy Technology Data Exchange (ETDEWEB)

    Corsino Fernandez, C.; Garcia-Mayordomo, J.

    2014-07-01

    Earthquakes are one of the geological hazards which have produced more human and material loses in the history of manking. Seismic engineering has the purpose of studying the soil dynamic behavior in order to desing structures and buildings adapted to the effects triggered by earthquakes. Within this purpose, one of the most important tasks has been the sutdy of the amplifying effect of seismic movement due to ground characteristics, which is often a major cause responsible of the damage produced by earthquakes, even when their magnitude is not very high. In this article, the soil amplifying effects is considered according to two official sismorresistant regulations in Spain: the current Norma de Construccion Sismorresistente Espanola (NCSE-02) and the European regulation Eurocode 8 (EC-8). First, soils classification different criteria is analyzed and how this affects the soil factor and, particularly, the design seismic action in the form of response spectra. Subsequently, we compared the result of apllying both regulations to typical geological scenarios where the application of either regulation may cause notable differences. The second part of the paper deals with the comparison of NCSE-02 and EC-8 applied in the frame of a real case: the 11{sup t}h May, 2011 Lorca earthquake. We compare the response spectra from both regulations to the actual response spectra derived from the accelerometric record of the earthquake at the Lorca station, and discuss which one fits it better. (Author)

  10. Analysis of the soil amplification factor in NCSE-02 and Eurocode-8 regulations: application to the 11th May , 2011 Lorca earthquake

    International Nuclear Information System (INIS)

    Corsino Fernandez, C.; Garcia-Mayordomo, J.

    2014-01-01

    Earthquakes are one of the geological hazards which have produced more human and material loses in the history of manking. Seismic engineering has the purpose of studying the soil dynamic behavior in order to desing structures and buildings adapted to the effects triggered by earthquakes. Within this purpose, one of the most important tasks has been the sutdy of the amplifying effect of seismic movement due to ground characteristics, which is often a major cause responsible of the damage produced by earthquakes, even when their magnitude is not very high. In this article, the soil amplifying effects is considered according to two official sismorresistant regulations in Spain: the current Norma de Construccion Sismorresistente Espanola (NCSE-02) and the European regulation Eurocode 8 (EC-8). First, soils classification different criteria is analyzed and how this affects the soil factor and, particularly, the design seismic action in the form of response spectra. Subsequently, we compared the result of apllying both regulations to typical geological scenarios where the application of either regulation may cause notable differences. The second part of the paper deals with the comparison of NCSE-02 and EC-8 applied in the frame of a real case: the 11 t h May, 2011 Lorca earthquake. We compare the response spectra from both regulations to the actual response spectra derived from the accelerometric record of the earthquake at the Lorca station, and discuss which one fits it better. (Author)

  11. Dieter Messner, los manuals de Espanol impresos en Viena en el siglo XVII. Edición facsimil y comentario, vol. 1-11, Institut für Romanistik der Universität Salzburg, Biblioteca hispano-lusa, Salzburg 2000, pág. LX + 856.

    Directory of Open Access Journals (Sweden)

    Mitja Skubic

    2001-12-01

    Full Text Available El estimado cultivador de los problemas lingüísticos y filológicos iberorromances prof. Dieter Messner de la Universitad de Salzburgo, hispanista y lusitanista, ha enriquecido nuestro conocimiento de los contactos en el campo de la enseñanza de las lenguas alemana y española y, más ampliamente, de la esfera cultural en Austria en lo que atañe el español: la reimpresión de los manuales de español impresos en Viena en el siglo diecisiete es preciosa por varios aspectos. Primero, sin duda, el comprobar el interés en aquel entonces, quizás necesidad, de aprender las respectivas lenguas. En el primer manual Grammatica y Pronunciacion Alemana y Española. Espanola y Alemana de luan Angel de Zumaran se lee como subtítulo "Compuesta en beneficio de estas dos Naciones, que quieren aprender una destas lenguas". El libro apareció en Viena en el año 1634. El autor no era nuevo in rebus lexicograficis: en el 1626 apareció su Thesaurus linguarum. In quo facilis via Hispanicam Gal­ licam ltalicam attingendo etiam per Latinam & Germanicam sternitur. A Ioanne Angelo a Sumaran, nobili cantabro.

  12. Transversotrema Witenberg, 1944 (Trematoda: Transversotrematidae) from inshore fishes of Australia: description of a new species and significant range extensions for three congeners.

    Science.gov (United States)

    Cutmore, Scott C; Diggles, Ben K; Cribb, Thomas H

    2016-09-01

    Four transversotrematid trematodes are reported from commercial teleost species in Australian waters. Transversotrema hunterae n. sp. is described from three species of Sillago Cuvier (Sillaginidae) from Moreton Bay, south-east Queensland. Molecular characterisation using ITS2 rDNA confirmed this stenoxenic specificity of Transversotrema hunterae n. sp., with identical sequence data from Sillago maculata Quoy & Gaimard, S. analis Whitley and S. ciliata Cuvier. Phylogenetic analysis, based on 28S rDNA data, demonstrates that T. hunterae n. sp. belongs to the 'Transversotrema licinum clade' and is most closely related to Transversotrema licinum Manter, 1970 and T. polynesiae Cribb, Adlard, Bray, Sasal & Cutmore, 2014, with the three species forming a well-supported clade in all analyses. We extend the known host and geographical ranges of three previously described Transversotrema species, T. licinum, T. elegans Hunter, Ingram, Adlard, Bray & Cribb, 2010 and T. espanola Hunter & Cribb, 2012. The new records represent significant range extensions for the three species and permit further examination of the patterns of biogeographical distribution in Australian waters. Host-specificity of Transversotrema species is examined, and the degree to which morphological analysis can inform taxonomic studies of this group is discussed.

  13. Composición corporal y velocidad de lanzamiento en jugadoras de élite de balonmano

    Directory of Open Access Journals (Sweden)

    Miriam García Expósito

    2011-01-01

    Full Text Available El objetivo de este estudio fue describir y comparar las caracteristicas antropometricas, composicion corporal, somatotipo y velocidad de lanzamiento de las jugadoras de balonmano de la seleccion espanola de diferentes categorias. Fueron estudiadas 59 jugadoras de balonmano, todas ellas pertenecen a las categorias juvenil, junior y senior. Las variables analizadas fueron: 20 medidas antropometricas, el indice de masa corporal, sumatorio de cuatro pliegues, porcentaje muscular, el somatotipo y las velocidades de lanzamiento. No se encontraron diferencias estadisticamente significativas (p . 0,05 en las variables que caracterizan a la muestra asi como en el somatotipo y velocidad de lanzamiento en los distintos equipos nacionales. Todas las selecciones estudiadas presentan un somatotipo endo-mesomorfico a excepcion del equipo juvenil que presenta un somatotipo meso-endomorfico. Los resultados corroboran que existe un prototipo de jugadora de balonmano similar en todas las categorias. El componente mesomorfico es el predominante por lo que se puede deducir que la robustez musculo-esqueletico en el balonmano femenino puede ser determinante.

  14. Confluencias y divergencias entre la poesía de Vanguardia en Latinoamérica y la poesía surgida de la guerra civil española

    Directory of Open Access Journals (Sweden)

    Gustavo Geirola

    2016-04-01

    Full Text Available El artículo trata los estilos de la vanguardia (tomando la dimensión militar que el término admite en la teoría de la guerra de Clausewitz para ensayar una hipótesis según la cual la vanguardia no encarnaría "lo nuevo", sino que sería una prolongación de lo viejo y una "reacción" ante lo nuevo (fascismo/nazismo, el proletariado, la industrialización, la cultura de masas, el diseño de un nuevo intelectual, etc.. Se intenta contrastar la hipótesis con la poesía latinoamericana y la surgida de la Guerra Civil Espanola (exilio y poesía fransquista. The article presents the avant-garde styles (considering the military dimension of the term as defined by Clausewitz's theory of war to propase a hypothesis that the avant-garde does not represent "the new". It is instead an extension of the old and a reaction to the new (fascism/nazism, the proletariat, industrialization, mass culture, the design of a new intellectual, etc.. This hypothesis is contrasted with Latin American poetry and poetry inspired by the Spanish Civil War (exile and Francoist poetry.

  15. Meet changing fuel requirements with online blend optimization

    Energy Technology Data Exchange (ETDEWEB)

    Diaz, A. [Compania Espanola de Petroleos, S.A., Cadiz (Spain). Algeciras Refinery; Barsamian, J.A. [ABB Simcon Inc., Bloomfield, NJ (United States)

    1996-02-01

    Compania Espanola de Petroleos (CEPSA) embarked on an overall refinery automation program, with state-of-the-art gasoline blending being one of the highest priorities. The result of this effort is a sophisticated computerized gasoline blending system using offline LPs for initial optimal recipe calculation, an online LP for real-time blend recipe reformulation using online analyzers for blending model adjustment, complete automation of blending sequence startup and shutdown, generation of end of blend quality performance reports, and real-time integration between lab, tank gauging, plant information, and blending systems. The entry of Spain in the EEC brought with it the need to quickly adapt to the requirements of an openly competitive marketplace emphasizing no lead, oxygenated, high performance gasolines and ISO 9000 quality standards. The blending system allowed CEPSA to produce lowest cost, minimum giveaway gasolines, while having the flexibility to produce a wide variety of modern gasolines serving the Western European market. The paper describes the blender architecture, optimizer linear programming, man machine interface, and results from the blending system.

  16. Chemical signature of two Permian volcanic ash deposits within a bentonite bed from Melo, Uruguay

    Directory of Open Access Journals (Sweden)

    Liane M. Calarge

    2006-09-01

    Full Text Available A Permian bentonite deposit at Melo, Uruguay is composed of a calcite-cemented sandstone containing clay pseudomorphs of glass shards (0-0.50 m overlying a pink massive clay deposit (0.50-2.10m. The massive bed is composed of two layers containing quartz and smectite or pure smectite respectively. The smectite is remarkably homogeneous throughout the profile: it is a complex mixed layer composed of three layer types whose expandability with ethylene glycol (2EG 1EG or 0EG sheets in the interlayer zone which correspond to low-, medium- and high-charge layers respectively varies with the cation saturating the interlayer zone. The smectite homogeneity through the profile is the signature of an early alteration process in a lagoonal water which was over saturated with respect to calcite. Compaction during burial has made the bentonite bed a K-depleted closed system in which diagenetic illitization was inhibited. Variations in major, REE and minor element abundances throughout the massive clay deposit suggest that it originated from two successive ash falls. The incompatible element abundances are consistent with that of a volcanic glass fractionated from a rhyolite magma formed in a subduction/collision geological context.Um depósito Permiano de bentonita em Melo, Uruguai,é composto por um arenito com cimento calcítico contendo pseudomorfos de argila sobre detritos vítreos(0-0.50 m superpostos a um deposito maciço de argila rosado (0.50-2.10 m. A camada maciça é composta por dois níveis contendo quartzo e esmectita ou esmectita pura, respectivamente. A homogeneidade de esmectita ao longo do perfil é notável: trata-se de um interestratificado composto de três tipos de camadas, cuja expansibilidade com etileno-glicol (folhas 2EG, 1EG ou 0EG na zona interfoliar correspondentes a camadas com baixa, média e alta carga, respectivamente variam com o tipo de cátion que satura a zona interfoliar. A homogeneidade da esmectita ao longo do perfil

  17. Preparação e caracterização de organobentonita modificada com ionenos alifáticos Preparation and characterization of aliphatic ionene-modified organobentonite

    Directory of Open Access Journals (Sweden)

    Arão P. Costa Filho

    2005-07-01

    Full Text Available A preparação de complexos bentonita-ionenos a partir da adsorção de tetrametil-[x,y]-ionenos, onde x= 2 e y= 4,6,10 ou 12, e o 2-hidróxi-3-cloro-ioneno, EPI-DMA, foi realizada com a finalidade de observar o comportamento do tamanho do espaçador do ioneno na expansão basal (d001 das camadas de uma bentonita comercial do Brasil. Os complexos foram caracterizados por espectrometria de absorção na região do infravermelho, termogravimetria, fluorescência e difração de raios X. A partir das análises por fluorescência e difração de raios X dos complexos, foi observado que os poli-quaternários de amônio são adsorvidos nas superfícies internas e externas da argila delaminada, acima da capacidade de troca catiônica, CTC = 91 meq/100g de argila (calculada a partir de dados de fluorescência de raios X. A expansão basal das camadas da argila com os diferentes policátions revelou que o tamanho do espaçador é o fator mais importante, independentemente das massas molares dos ionenos, tal como foi observado principalmente entre os complexos Bt-2,10- e Bt-2,12-ioneno, com massas molares de 12000 e 5000 g/mol, respectivamente.The preparation of bentonite-ionene complexes based on the adsorption of 2y-ionenes, where y = 4, 6, 10 or 12 and an ionene of the epichloridrin-dimethylamine EPI-DMA kind, was carried out in order to observe the behavior of the ionene spacer size in the expansion of the basal space (d-spacing, d001 of a Brazilian commercial bentonite. The complexes were characterized by adsorption spectromety in the infrared region, thermogravimetry, fluorescence and X-Ray diffraction. Ionenes were synthesized and characterized by infrared and nuclear magnetic resonance, the latter technique being useful for determining the average number molecular weight values. Based on the clay-ionenes complexes it could be observed that the ammonium polyquaternaries are adsorbed on the inner and outer clay surfaces, above the ion exchange

  18. Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectancesUso de dados espectrais para estimar a relação entre óxidos de ferro e minerais 2:1 com suas respectivas reflectâncias

    Directory of Open Access Journals (Sweden)

    Everson Cezar

    2013-09-01

    repetições por tratamento. As leituras espectrais das amostras de hematita, goethita, magnetita e bentonita foram realizadas por meio do equipamento FieldSpec 3 jr, o qual recobre a faixa espectral de 350 a 2500 nm. Após as leituras, foram escolhidos os intervalos que melhor representavam os minerais e realizaram-se as análises estatísticas a partir dos fatores de reflectância médios encontrados nestes pontos. Os resultados mostraram que a hematita, goethita e magnetita apresentam relação não linear com seus respectivos fatores de refletância, enquanto que a bentonita apresenta relação linear não só no intervalo estudado, mas em toda faixa coberta pelo equipamento. Desta maneira, conclui-se que quantidades relativamente pequenas destes óxidos de ferro são capazes de afetar a reflectância do solo da mesma forma que quantidades próximas de 100%. Com relação aos minerais 2:1 conclui-se que o aumento na proporção dos mesmos em uma determinada classe de solo leva a uma queda progressiva do fator de reflectância em todo o espectro-óptico, assim como descrito para outros elementos.

  19. Modelación del módulo de la resistencia a la flexión de un material compuesto cementicio a partir de propiedades en estado fresco

    Directory of Open Access Journals (Sweden)

    Fernando Toro

    2014-01-01

    Full Text Available En la presente investigación se estudió la relación entre las propiedades del estado fresco y el estado endurecido de un material compuesto formado por una matriz de cemento Pórtland reforzado con fibra de fique dispuestas al azar, las propiedades evaluadas en estado fresco fueron: ondulabilidad, fluidez, drenabilidad y en estado endurecido el módulo de la resistencia a la flexión. Las muestras se prepararon con diferentes materias primas (Fibra de fique, Bentonita, Pulpa, Humo de Sílice y Acronal, las componentes se agregaron a una mezcladora a velocidad constante, luego se vertió la mezcla en una cámara de drenado donde se extrajo el agua y se conformó la lámina con dimensiones de 130x50x6 mm, luego se sumergió en una piscina de curado por 28 días para ser evaluado el módulo de la resistencia a la flexión. El modelo de regresión lineal que se propuso para predecir el módulo de la resistencia a la flexión, en función de las propiedades en estado fresco, se realizó a través del análisis de las interacciones entre las variables de la formulación de la mezcla utilizada. Como resultado del modelo de regresión se obtuvo que existe una clara correlación entre el módulo de la resistencia a la flexión y las propiedades predictoras ondulabilidad, fluidez y drenabilidad, además estas tienen un efecto negativo sobre el módulo de la resistencia a la flexión.

  20. Evaluación de la reducción de pelets utilizando carbón como agente reductor

    Directory of Open Access Journals (Sweden)

    Sandra Patricia Pérez Velásquez Alfonso López Díaz

    2010-11-01

    Full Text Available La obtención del acero se realiza a partir del mineralde hierro o de  la chatarra. En el primer caso el procesotiene lugar vía alto horno–convertidor; en el segundo,vía horno  eléctrico de  arco. Sin  embargo,  al hornoeléctrico también se pueden cargar los denominadospelets  prerreducidos  de  minerales  de  hierro,materiales metálicos  que  pueden  ser  obtenidos  apartir de  finos de mineral de hierro  (portador de  lacarga metálica,  finos de  carbón  (agente  reductor,finos  de  cal  (agente  desulfurante  y  bentonita(aglomerante, los cuales son convertidos en ovoidesmediante el empleo de un disco peletizador. El trabajomuestra  la  caracterización  realizada  a  las materiasprimas,  los  ensayos  de  reducibilidad  efectuados  apelets cargados en un horno tipo Linder –fabricadosa partir de dos yacimientos colombianos de mineralesde  hierro–  y  el  diseño  y  construcción  de  un  hornopara evaluar el comportamiento de los pelets durantela  reducción. Describe  los  equipos  y  analiza  sus

  1. Study of the combining adsorption-microfiltration process for the treatment of coloured waters

    Directory of Open Access Journals (Sweden)

    Addaou, Abdelah

    2012-06-01

    Full Text Available Generally textile effluents are highly coloured, contain non-biodegradable compounds and they have high content of solid wastes, comprising fibres and paper wastes. The discharge of such effluents in the environment is worrying for both toxicological and esthetical reasons. The aim of the present work is to study the performances of the combining microfiltration-adsorption process for the treatment of coloured waters. Methylene Blue (MB was used as model compound. The effects of significant operating parameters such as transmembrane pressure (TMP and bentonite concentration on the process performance characterized by flux and rejection factor were investigated. Experiments carried out with Methylene Blue solutions confirmed the potential of this combined process for the treatment of dyed waters.

    Normalmente los efluentes de la industria textil están coloreados y contienen compuestos no biodegradables además de residuos sólidos, fibras y residuos de papel. La liberación de tales efluentes al ambiente es preocupante tanto por razones estéticas como toxicológicas. El propósito del presente trabajo es realizar el estudio de las prestaciones del proceso combinado de adsorción-microfiltración para el tratamiento de aguas coloreadas. Se utilizó Azul de Metileno como compuesto tipo. La influencia de parámetros de operación tales como Presión transmembrana y la concentración de bentonita en el comportamiento del proceso, caracterizado por el flujo del permeado y el factor de retorno que fueron los parámetros estudiados. Los experimentos realizados con las soluciones de Azul de Metileno han confirmado el potencial del proceso combinado para el tratamiento de las aguas teñidas.

  2. Engineered barriers for radioactive waste confinement

    Directory of Open Access Journals (Sweden)

    Fernández, R.

    2011-09-01

    Full Text Available Nuclear power plants generate long-lived radioactive waste of high toxicity. The security assessment of repositories destined to definitive confinement of radioactive waste has been studied for several decades. Deep geological repositories are technically feasible and begin to be built by some pioneer countries. The scientific evaluation of interactions between the different engineered barriers is studied by laboratory experiments, natural analogues and modeling studies. The three methods are able to represent and validate the main geochemical processes that take place in the near field. This paper reviews the scientific and technical basis of the concept of geological disposal, with particular focus on the methods of study applied to the evaluation of geochemical stability of the bentonite barrier.

    Las centrales nucleares generan residuos radiactivos de elevada peligrosidad y permanencia en el tiempo. La evaluación de la seguridad de repositorios destinados al alojamiento definitivo de estos residuos lleva estudiándose desde hace varias décadas. El almacenamiento geológico es técnicamente factible y empieza ya a desarrollarse en países pioneros. La evaluación científica de las interacciones entre las distintas barreras de ingeniería se estudia mediante ensayos de laboratorio, análisis de análogos naturales y modelos teóricos. Las tres vías de estudio son capaces de representar y validar los principales procesos geoquímicos que tienen lugar en el campo cercano al repositorio. Este artículo revisa los fundamentos científicos y técnicos del concepto de almacenamiento geológico detallando, en particular, los métodos de estudio aplicados a la evaluación de la estabilidad geoquímica de la barrera de bentonita.

  3. Avaliação da influência da casca no processamento de sucos clarificados de maçãs Fuji e Gala - DOI: 10.4025/actascitechnol.v29i1.95

    Directory of Open Access Journals (Sweden)

    Eliane Dalva Godoy Danesi

    2007-12-01

    Full Text Available Devido ao aumento da produção de maçãs no Brasil, um excedente do consumo in natura pode ser destinado à industrialização. Os sucos de maçãs são uma interessante alternativa de aproveitamento de frutas. Os componentes aromáticos estão distribuídos na fruta e o processamento pode influenciar a sua composição. Além disso, as enzimas responsáveis por escurecimento e off-flavor devem ser inibidas ou eliminadas para melhorar a qualidade dos sucos. Maçãs das variedades Fuji e Gala foram processadas com a casca e sem a casca para obtenção de sucos clarificados através de enzimas pectinolíticas e tratamento com gelatina e bentonita. As maçãs e os sucos obtidos foram submetidos a análises físico-químicas, microbiológicas, sensoriais e de rendimento. Os resultados das análises microbiológicas mostraram a eficiência do processamento e do tratamento térmico adotado. Pelo fato dos atributos físico-químicos e a aceitabilidade global, nos sucos com e sem a casca, não terem diferido de forma significativa (nível de significância de 5%, pode-se concluir que o processamento de sucos clarificados com a casca é o mais indicado, uma vez que assim obtêm-se rendimentos superiores.

  4. Raising infanta Catalina de Aragón to be Catherine queen of England

    Directory of Open Access Journals (Sweden)

    Earenfight, Theresa M.

    2016-06-01

    Full Text Available This study examines the household of infanta Catalina de Aragón, youngest daughter of Isabel of Castile and Fernando of Aragon, to demonstrate how trusted women at court provided the foundation for Catalina’s transformation from Spanish infanta to English queen. Using account records from the court of her mother and records from English royal sources, this essay focuses four women in particular –Inés Vanegas, María de Rojas, María de Salinas, Elvira Manuel– who were deeply embedded in a complex kin and patronage network at court. Their tutelage and loyalty prepared Catalina to navigate the complexity of court politics in Tudor England.Este estudio examina la casa de la infanta Catalina de Aragón, hija menor de Isabel de Castilla y Fernando de Aragón, para mostrar cómo las mujeres de confianza de la corte constituyeron la base de la transformación de Catalina de infanta espanola en reina inglesa. Utilizando los libros de cuentas de la casa y corte de su madre y documentos reales ingleses, este ensayo se centra en cuatro mujeres en particular –Inés Vanegas, María de Rojas, María de Salinas y Elvira Manuel–, inmersas en unas complejas redes de parentesco y de patronazgo dentro de la propia corte. Su tutela y lealtad prepararon a Catalina para sortear los entresijos de la política cortesana de la Inglaterra de los Tudor.

  5. Genetic differentiation between marine iguanas from different breeding sites on the island of Santa Fe (Galapagos Archipelago).

    Science.gov (United States)

    Lanterbecq, Deborah; Glaberman, Scott; Vitousek, Maren Noelani; Steinfartz, Sebastian; Benavides, Edgar; Wikelski, Martin; Caccone, Adalgisa

    2010-01-01

    We studied patterns of genetic diversity within and among 5 populations (318 individuals) of Galápagos marine iguanas (Amblyrhynchus cristatus) from the island Santa Fé. Populations were separated by distances of 0.2 to 9.9 km. We sequenced 1182 base pairs of the mitochondrial control region and screened 13 microsatellite loci for variability. We also added data from 5 populations (397 individuals) sampled on 4 neighboring islands (Santa Cruz, Floreana, Espanola, and San Cristobal). The 5 Santa Fé populations, revealed as genetically distinct from populations on other islands, present relatively low levels of genetic diversity, which are similar for both microsatellite (average observed heterozygosity from 0.7686 to 0.7773) and mitochondrial DNA (mtDNA) markers (haplotypic and nucleotide diversity from 0.587 to 0.728 and from 0.00079 to 0.00293, respectively), and comparable with those observed in similar-sized sampling sites on other islands. There was frequency-based evidence of genetic structure between northern and southern sites on Santa Fé (F(st) of 0.0027-0.0115 for microsatellite and 0.0447-0.2391 for mtDNA), but the 4 southern sites showed little differentiation. Most of the intra-island genetic variation was allocated within rather than between sites. There was no evidence of sex-biased dispersal or population substructuring due to lek-mating behavior, suggesting that these 2 observed behaviors are not strong enough to leave an evolutionary signal on genetic patterns in this species.

  6. [Self-regulation systems to control tobacco advertising. An empirical analysis].

    Science.gov (United States)

    Martín, Marta; Quiles, M del Carmen; López, Carmen

    2004-01-01

    Against the background of the debate aroused by the tobacco advertising ban as a result of Directive 98/43/EC and of the Proposed Directive of 5/9/2001, we aimed to evaluate how self-regulation of tobacco advertising systems has worked in the last 5 years and to evaluate its effectiveness and relevance as a potential tool in public health prevention. We performed a content and discourse analysis of all advertisements appearing in the Sunday supplements of the three weekly newspapers with the widest circulation in Spain (El Pais, El Mundo, and ABC) between January 1995 and January 2000 to detect infractions of the norms of the self-regulation code of the Spanish Tobacco Association (Asociacion Espanola de Tabaco [AET]) regarding: a) the identity of models used in advertising; b) direct or indirect claims for the therapeutic properties of smoking; c) depiction of cigarettes in advertisements, and d) printed warnings on advertisements. We examined 910 banners and 369 advertisements. Very few advertisements displayed rational arguments on elements such as price (13%) or product components (7%). Although the AET's code was generally respected, the advertisements displayed a series of subtleties that allowed the industry to get around the code: 10 of the 369 advertisements reviewed depicted famous people (mainly pilots and artists) and one third of them used iconic personages (Joe Camel or Marlboro Man); one advertisement suggested the therapeutic properties of tobacco and almost all linked smoking with social success and leisure. Although cigarettes were not depicted, 18% of the advertisements showed substitutes for cigarettes in various places (12%) and a large percentage infringed the code's recommendations on printed warnings. The industry's use of creative subtleties infringing its self-imposed norms begs the question of how far self-regulation is viable when a failure in the system can have serious consequences for public health.

  7. Compostos poliméricos como aditivos de argilas bentoníticas Polymeric compounds as additives for bentonite clays

    Directory of Open Access Journals (Sweden)

    M. I. R. Barbosa

    2007-12-01

    Full Text Available Este trabalho tem por objetivo avaliar o efeito da utilização de compostos poliméricos na aditivação de bentonitas de Boa Vista, PB, consideradas de qualidade inferior, para utilização em fluidos de perfuração à base de água, visando a melhoria das suas propriedades reológicas e de filtração. Foram estudadas uma amostra de argila bentonítica e três amostras de aditivos poliméricos, sendo uma de poliacrilamida parcialmente hidrolisada e duas de carboximetilcelulose de diferentes graus de viscosidade. O dimensionamento das composições do composto polimérico foi obtido por meio da metodologia de delineamento de misturas, sendo definidas dez composições. O composto polimérico foi misturado à argila seca, em diferentes concentrações e, em seguida, preparados os fluidos de perfuração e determinados as viscosidades aparente e plástica, o limite de escoamento e o volume de filtrado segundo normas da Petrobrás. Os resultados mostram que a aditivação da argila bentonítica com o composto polimérico melhora as suas propriedades, adequando-a às especificações da Petrobrás para utilização em fluidos de perfuração à base de água.The aim of this work is to evaluate the effect of polymeric compound on the treatment of bentonite clays for using in water and clay based drilling fluids for the improvement of the filtration and the rheological properties. One industrialized sodic bentonite clay sample and three polymeric additive samples, being two samples of carboximethylcellulose and one of partially-hydrolyzed polyacrylamide, were studied. The compositions of the polymeric compound were obtained through the methodology of mixture design, being defined ten different compositions. The polymeric compound with dry clay was mixed in different concentrations and the drilling fluids were prepared according to the Petrobrás standards; the apparent and plastic viscosities, the yield stress and the water loss were determined

  8. Preparação de argilas organofílicas e desenvolvimento de nanocompósitos de polietileno. Parte 2: comportamento de inflamabilidade Preparation of organophilic clays and development of polyethylene nanocomposites. Part 2: flammability behavior

    Directory of Open Access Journals (Sweden)

    Renata Barbosa

    2007-06-01

    Full Text Available Nanocompósitos de polietileno de alta densidade/argila bentonita foram preparados por meio da técnica de intercalação por fusão. Para a modificação da argila foram utilizados quatro tipos diferentes de sais quaternários de amônio visando a sintetizar argilas organofílicas. A argila não modificada e modificada com os quatro sais foi incorporada em teores de 1 e 3% a uma matriz de polietileno. A estabilidade térmica e a inflamabilidade dos sistemas foram determinadas por termogravimetria e segundo a norma UL-94 HB, respectivamente. A avaliação da dispersão e a distância entre planos (d001 das partículas de argila foram realizadas por difração de raios X (DRX e microscopia eletrônica de transmissão (MET. A presença da argila organofílica na matriz polimérica aumentou a temperatura de degradação dos sistemas em relação ao polímero puro. Os sistemas apresentaram atraso da velocidade de queima, indicando uma melhoria no comportamento de inflamabilidade dos nanocompósitos.High density polyethylene/Bentonite clay nanocomposites were prepared by the melt intercalation technique. The clay was organically modified with different quaternary ammonium salts to obtain the organoclay. The unmodified and modified clays with the quaternary ammonium salts were introduced in a polyethylene matrix with 1 and 3 wt. % of clay. The thermal stability and the flammability of the systems were investigated by thermogravimetry and UL-94HB standard, respectively. The dispersion analysis and the interlayer distance (d001 of the clay particles were obtained by X ray Diffraction (XRD and transmission electron microscopy (TEM. The organoclay presence in the polymer matrix increased the degradation temperature in relation to the pure polymer. The systems showed a reduction on the burning rate, indicating that the flammability resistance of the nanocomposites was improved.

  9. Produção e caracterização físico-química de fermentado de umbu Production and physicochemical characterization of fermented umbu

    Directory of Open Access Journals (Sweden)

    Breno de Paula

    2012-09-01

    Full Text Available O objetivo deste trabalho foi desenvolver um fermentado de umbu visando a agregar valor a esse fruto e contribuir para a melhoria de renda das famílias do semiárido nordestino. A polpa utilizada nos experimentos foi submetida a análises físico-químicas e microbiológicas. Para a produção da bebida, a polpa foi diluída em água, sendo necessário realizar uma chaptalização com sacarose até atingir 20,5°Brix. A levedura vínica comercial utilizada foi Saccharomyces cerevisiae. A fermentação foi conduzida a 18°C durante 18 dias e posteriormente a bebida foi submetida a uma estabilização com auxílio de agentes de sedimentação, gelatina e bentonita, por 14 dias a 1°C. Após a estabilização, o fermentado de umbu foi filtrado em filtro prensa. O fermentado de umbu obtido apresentou teor alcoolico de 11,20°GL. A bebida foi analisada quanto às suas características físico-químicas e todos os parâmetros estavam em conformidade com a legislação vigente.The objective of this study was to develop a fermented umbu drink aiming at adding value to this fruit and contribute for improving the families income in Brazil northeast semiarid region. The pulp used in the experiments was subjected to physico-chemical and microbiological analysis. For the production of liquor, the pulp was diluted with water, and needed a sugaring with sucrose up to 20.5°Brix. A commercial Saccharomyces cerevisiae wine yeast was used. The fermentation was conducted at 18°C for 18 days and subsequently underwent a drink with the aid of stabilizing agents of sedimentation, gelatin and bentonite, for 14 days at 1°C. After stabilizing the fermented umbu drink was subjected to filtered in filter press. The fermented alcoholic umbu drink showed an alcohol contents of 11.20°GL. The drink was analyzed for their physicochemical characteristics and all parameters were in accordance with current legislation.

  10. Obtenção de nanocompósitos condutores de montmorilonita/polipirrol: efeito da incorporação do surfactante na estrutura e propriedades

    Directory of Open Access Journals (Sweden)

    Sílvia Daniela Araújo da Silva Ramôa

    2014-01-01

    Full Text Available Nanocompósitos de montmorilonita/polipirrol (MMT/PPy foram preparados a partir da polimerização in situ do pirrol na presença de argila, bentonita sódica natural, (MMT-Na+ em solução aquosa com ou sem surfactante aniônico, dodecil sulfato de sódio (SDS, utilizando-se o cloreto de ferro (III hexahidratado (FeCl3.6H2O, como oxidante. A estrutura e propriedades dos nanocompósitos obtidos pela polimerização in situ do pirrol na presença de SDS (MMT/PPy.SDS e sem surfactante (MMT/PPy foram avaliadas e comparadas a partir da espectroscopia de infravermelho com transformada de Fourier (FTIR, difração de raios X (DRX, microscopia eletrônica de varredura (MEV, microscopia eletrônica de transmissão (MET, análise termogravimétrica (TG e método padrão quatro pontas. Os difratogramas dos nanocompósitos revelaram que o espaçamento basal d001 da MMT (1,42 nm foi alterado para valores maiores, indicando a intercalação do PPy na MMT para ambos os nanocompósitos obtidos. Os difratogramas e as imagens de MET e MEV dos nanocompósitos de MMT/PPy.SDS confirmaram que a presença do SDS na reação promoveu, além da intercalação, esfoliação parcial da argila. Os nanocompósitos MMT/PPy.SDS apresentaram condutividade elétrica (9,50 S/cm maior do que o nanocompósito de MMT/PPy (4,44 S/cm. A presença da argila melhorou de forma significativa a estabilidade térmica do PPy.

  11. Membrana cerâmica assimétrica à base de argila para aplicação em processos de microfiltração: influência do tempo de deposição

    Directory of Open Access Journals (Sweden)

    M. C. da Silva

    2014-09-01

    Full Text Available A tecnologia de membranas vem sendo disseminada pelo mundo, em diversos setores onde existe a necessidade de separação de substancias, em diferentes escalas de dimensões e condições de temperatura e pressão. Neste sentido, as membranas cerâmicas vêm sendo exploradas para atuarem em ambientes onde as membranas poliméricas teriam restrições, como por exemplo, na presença de solventes orgânicos, altas pressões e temperaturas, etc. Diante disso, esse trabalho tem como objetivo a obtenção de membrana cerâmica assimétrica formada por uma camada filtrante à base de argila depositada sobre suporte poroso obtido com alumina comercial e bentonita. A camada ativa foi depositada por colagem em tempos de 10, 20 e 30 s para obtenção da membrana assimétrica. As massas cerâmicas para confecção do suporte e para obtenção da membrana foram caracerizadas por distrubuição granulométrica e microscopia eletrônica de varredura. O suporte poroso e a membrana assimétrica foram caracterizados por microscopia eletrônica de varredura, porosimetria por intrusão de mercúrio e foram realizadas análises de fluxo com água. Os resultados mostraram um suporte com diâmetro médio de 0,99 µm e porosidade de 39,25%. A membrana assimétrica foi obtida com sucesso, isenta de defeitos para tempo de colagem de 10 s, atingindo uma espessura de camada depositada de 104 µm, diâmetro médio de poro de 0,25 µm e porosidade de 35%, sendo classificada, portanto, para aplicações em processos de microfiltração, com fluxo permeado estabilizado com água destilada em torno de 100 L/h.m².

  12. Estudo do comportamento reológico das argilas bentoníticas de Cubati, Paraíba, Brasil Rheological behavior study of bentonite clays from Cubati, Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    R. R. Menezes

    2009-12-01

    Full Text Available O estado da Paraíba possui jazidas de bentonitas utilizadas comercialmente para uma vasta gama de setores tecnológicos. No entanto, esses jazimentos estão se exaurindo, após dezenas de anos de exploração. Assim, este trabalho tem por objetivo dar prosseguimento à caracterização de argilas bentoníticas de Cubati, PB, estudando o comportamento reológico das dispersões argila-água de modo avaliar seu desempenho para fluidos de perfuração de poços de petróleo base água. As amostras estudadas foram secas a 60 ºC e determinou-se sua capacidade de troca de cátions. As argilas foram transformadas em sódica por tratamento com Na2CO3 e em seguida realizou-se o estudo do comportamento reológico das dispersões. As viscosidades, aparente e plástica, o volume de filtrado, os parâmetros reológicos do fluido e a sua força gel foram determinados. Os resultados evidenciaram que cada amostra apresenta um teor ótimo de carbonato de sódio e que as dispersões argila-água possuem um comportamento pseudo-plástico e tixotrópico. Duas amostras apresentam potencial para utilização como agentes viscosificantes para fluidos de perfuração.The bentonites of the state of Paraíba, Brazil, are commercially used in numerous technological sectors, particularly in oil drilling muds. However, these bentonite deposits are becoming exhausted due to several years of exploitation. Thus, the aim of this work was continue the characterization of the bentonites from Cubati, Paraíba, studying the rheological behavior of water-clay suspensions, evaluating their viability to be used in oil drilling muds. The samples were dried at 60 ºC and, their cation exchange capacity was determined. The natural bentonite clays were transformed in sodium bentonite by addition of concentrated Na2CO3 solution, then the suspensions rheological study was performed. The apparent and plastic viscosities, water loss, rheological parameters and the gel force were determined

  13. Influencia de los coadyuvantes tecnológicos utilizados en el proceso de elaboración de aceite de oliva sobre la cinética del proceso de digestión anaerobia del alpechín

    Directory of Open Access Journals (Sweden)

    Borja Padilla, R.

    1992-08-01

    Full Text Available A kinetic study of the anaerobic digestion of olive mill wastewater, which was obtained with the technological helper "Olivex" (Carbohydrase -pectinases, cellulases and hemicellulases- from the Aspergillus aculeatus was carried out. An identical wastewater, obtained without this enzymatic formulation was also used. The process was carried out in bioreactors with microorganisms immobilized on two micronized clay supports, Sepiolite and Bentonite. The methane volume-time data pairs obtained were used to calculate the specific rate constant, Ko, by using the Roediger's equation. A decrease of the specific rate constant value was observed over the substrate concentration studied when the volume of wastewater added was increased; this confirmed the occurrence of an inhibition process, which was more marked for the olive mill wastewater obtained with Olivex. The Levenspiel's model was used to obtain the inhibition constants of this process.

    Se ha efectuado un estudio cinético del proceso de digestión anaerobia de un alpechín obtenido con el coadyuvante tecnológico "Olivex" (Carbohidrasa -pectinasas, celulasas y hemicelulasas- procedente de Aspergillus aculeatus en comparación con un testigo obtenido sin esta formulación enzimática. El proceso se ha realizado en biorreactores con microorganismos inmovilizados en dos soportes micronizados arcillosos, Sepiolita y Bentonita. A partir de los datos volumen de metano-tiempo, se calculan las constantes específicas de velocidad, Ko, utilizando la ecuación de Roediger. Dentro del rango de concentración de sustrato estudiado se observa una disminución de la constante cinética al aumentar el volumen de residuo añadido a los digestores lo que confirma la existencia de un proceso de inhibición, que es más acusado en el caso del alpechín obtenido con Olivex. Para determinar las constantes de inhibición del proceso se utiliza el modelo propuesto por Levenspiel.

  14. Morfologia de nanocompósitos de polietileno e poliamida-6 contendo argila nacional Morphology study of polyethylene and nylon 6 nanocomposites containing national clay

    Directory of Open Access Journals (Sweden)

    Renata Barbosa

    2006-01-01

    Full Text Available Nanocompósitos de polietileno de alta densidade e poliamida-6 com argila bentonita nacional foram preparados por meio do processo de intercalação por fusão. Para a modificação da argila foram utilizados tipos diferentes de sais quaternários de amônio visando sintetizar as argilas organofílicas. As argilas não modificada e modificada com os sais foram incorporadas nas matrizes poliméricas, sendo que foram utilizados procedimentos diferentes para a modificação das argilas: para os nanocompósitos de polietileno, a argila foi preparada com quatro sais quaternários de amônio e para os nanocompósitos de poliamida-6 foi utilizado um único tipo de sal quaternário de amônio, variando-se seus teores para a organofilização da argila. O objetivo desse trabalho foi obter nanocompósitos de polietileno e poliamida-6 e caracterizá-los por microscopia eletrônica de transmissão (MET e por difração de raios X (DRX. Os resultados indicaram que os sistemas polietileno/argila organofílica apresentaram estruturas de nanocompósitos intercalados e/ou parcialmente esfoliados. Já os sistemas poliamida-6/argila organofílica apresentaram uma morfologia esfoliada com uma predominância de partículas de argilas dispersas na matriz.High density polyethylene and nylon 6 nanocomposites with national bentonite clay were prepared with the melt intercalation technique. Different quaternary ammonium salts were used to obtain the organoclays. The unmodified and modified clays with the salts were incorporated in the polymer matrices and different procedures were used for the modification of clays: for the polyethylene nanocomposites, the clay was prepared with four quaternary ammonium salts and for the nylon 6 nanocomposites only one type of quaternary ammonium salt was used, which had its contents varied in the organophilization of the clay. The objective of this work was to obtain polyethylene and nylon 6 nanocomposites. They were characterized by

  15. Precambrian supercontinents, glaciations, atmospheric oxygenation, metazoan evolution and an impact that may have changed the second half of Earth history

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    Grant M. Young

    2013-05-01

    Full Text Available In more than 4 Ga of geological evolution, the Earth has twice gone through extreme climatic perturbations, when extensive glaciations occurred, together with alternating warm periods which were accompanied by atmospheric oxygenation. The younger of these two episodes of climatic oscillation preceded the Cambrian “explosion” of metazoan life forms, but similar extreme climatic conditions existed between about 2.4 and 2.2 Ga. Over long time periods, changing solar luminosity and mantle temperatures have played important roles in regulating Earth's climate but both periods of climatic upheaval are associated with supercontinents. Enhanced weathering on the orogenically and thermally buoyed supercontinents would have stripped CO2 from the atmosphere, initiating a cooling trend that resulted in continental glaciation. Ice cover prevented weathering so that CO2 built up once more, causing collapse of the ice sheets and ushering in a warm climatic episode. This negative feedback loop provides a plausible explanation for multiple glaciations of the Early and Late Proterozoic, and their intimate association with sedimentary rocks formed in warm climates. Between each glacial cycle nutrients were flushed into world oceans, stimulating photosynthetic activity and causing oxygenation of the atmosphere. Accommodation for many ancient glacial deposits was provided by rifting but escape from the climatic cycle was predicated on break-up of the supercontinent, when flooded continental margins had a moderating influence on weathering. The geochemistry of Neoproterozoic cap carbonates carries a strong hydrothermal signal, suggesting that they precipitated from deep sea waters, overturned and spilled onto continental shelves at the termination of glaciations. Paleoproterozoic (Huronian carbonates of the Espanola Formation were probably formed as a result of ponding and evaporation in a hydrothermally influenced, restricted rift setting. Why did metazoan

  16. Is there a standard for surgical therapy of hepatocellular carcinoma in healthy and cirrhotic liver? A comparison of eight guidelines.

    Science.gov (United States)

    Manzini, Giulia; Henne-Bruns, Doris; Porzsolt, Franz; Kremer, Michael

    2017-01-01

    Liver resection (LR) and transplantation are the most reliable treatments for hepatocellular carcinoma (HCC). Aim was to compare different guidelines regarding indication for resection and transplantation because of HCC with and without underlying cirrhosis. We compared the following guidelines published after 1 January 2010: American (American Association for the Study of Liver Diseases (AASLD)), Spanish (Sociedad Espanola de Oncologia Medica (SEOM)), European (European Association for the study of liver-European Organization for Research and Treatment of Cancer (EASL-EORTC) and European Society for Medical Oncology-European Society of Digestive Oncology (ESMO-ESDO)), Asian (Asian Pacific Association for the Study of Liver (APASL)), Japanese (Japan Society of Hepatology (JSH)), Italian (Associazione Italiana Oncologia Medica (AIOM)) and German (S3) guidelines. All guidelines recommend resection as therapy of choice in healthy liver. Guidelines based on the Barcelona Clinic Liver Cancer staging system recommend resection for single HCC<2 cm and Child-Pugh A cirrhosis and for HCC≤5 cm with normal bilirubin and portal pressure, whereas transplantation is recommended for multiple tumours between Milan criteria and for single tumours ≤5 cm and advanced liver dysfunction. Patients with HCC and Child-Pugh C cirrhosis are not candidates for transplantation. JSH guidelines recommend LR for patients with Child-Pugh A/B with HCC without tumour size restriction; APASL guidelines in general exclude patients with Child-Pugh A from transplantation. In patients with Child-Pugh B, transplantation is the second-line therapy, if resection is not possible for patients within Milan criteria. German and Italian guidelines recommend transplantation for all patients within Milan criteria. Whereas resection is the standard therapy of HCC in healthy liver, a standard regarding the indication for LR and transplantation for HCC in cirrhotic liver does not exist, although nearly all

  17. Propuesta para la integración de criterios sostenibles en los proyectos de ingenierìa civil: un caso práctico

    Directory of Open Access Journals (Sweden)

    Fernández-Sánchez, G.

    2011-12-01

    Full Text Available In this paper an indicator system is proposed for assessing sustainability in linear infrastructure projects from early stages (previous analysis of alternatives to allow classification of the different alternatives according to their impact on the environment, society and economy, and thus to select the most sustainable alternative. It is developed a brief study of the state of knowledge on sustainable construction worldwide and, according to existing initiatives, it is proposed the sustainability assessment of infrastructure projects using a set of criteria and indicators. The indicator system is also applied to a case study, a Spanish highway, through a multi-criteria analysis, to identify existing constraints to the implementation of sustainability criteria from early stages considering the project life cycle, taking into account the interest of controlling and monitoring the indicator valuation in later stages and their possible application in the comparison between projects.

    Se propone en este artículo un sistema de indicadores para la evaluación de la sostenibilidad en los proyectos de infraestructuras lineales desde etapas iniciales (estudio previo de soluciones para permitir la clasificación de las distintas alternativas según su impacto sobre el medio ambiente, la sociedad y la economía, y lograr así la selección de la solución considerada como más sostenible. Se realiza un breve estudio del estado del conocimiento relativo a la construcción sostenible a nivel internacional y, de acuerdo a las iniciativas existentes, se propone la evaluación de la sostenibilidad de los proyectos de infraestructuras mediante criterios e indicadores. Se aplica este sistema de indicadores a un caso de estudio de una autovía espanola mediante un análisis multicriterio, de manera que se identifican las limitaciones existentes para la aplicación de criterios sostenibles desde etapas tempranas considerando el ciclo de vida del proyecto

  18. La flexibilidad laboral: significados y consecuencias Labour Flexibility: Meanings and Consequences

    Directory of Open Access Journals (Sweden)

    Juan Ignacio Martínez Pastor

    2011-09-01

    Full Text Available

    Los objetivos del articulo son 1 analizar las consecuencias de la flexibilidad laboral en el curso vital de los individuos, 2 asi como saber si la flexibilidad ha socavado o reforzado la importancia de las clases sociales, de la educacion y del genero en distintos aspectos concernientes al curso vital, sobre todo relacionados con el empleo en Espana. La peculiaridad espanola con respecto a la flexibilidad radica en la alta proporcion de contratos temporales. La mayor diferencia entre estos contratos y los indefinidos es su menor coste de despido. La manera en la que el Estado del Bienestar ha introducido la flexibilidad ha logrado un equilibrio de riesgos entre generaciones, por lo que no puede decirse que haya unos claros ganadores o perdedores. Los datos indican que los efectos de la flexibilizacion sobre el curso vital de los individuos son mucho mas modestos de lo que las hipotesis preven. Asimismo, la flexibilización no ha mermado la importancia de las clases sociales ni de los niveles de estudio para explicar la posición de los individuos en el mercado laboral, aunque tampoco hay una clara evidencia de que las brechas entre los individuos de distintas clases ocupaciones o con distintos niveles de estudio hayan aumentado en Espana.

    The objectives of the paper are 1 to analyse the effects of labour flexibility on individuals from a lifecourse perspective and 2 to know whether flexibility has undermined or reinforced the effects of social classes, education and gender on several aspects concerning the life-course, above all those related to employment in Spain. The peculiarity of the Spanish case lies in the proportion of fixed-term contracts. The greatest difference between these contracts and permanent contracts is not the job to be done, or even its temporary or permanent nature, but rather the lower layoff cost. The way that the Welfare State has introduced flexibilisation has achieved a balance of risks between the generations

  19. Crops for biodiesel to be grown on mine tailings

    Energy Technology Data Exchange (ETDEWEB)

    Ulrichsen, H.

    2007-12-01

    Natural Resources Canada has launched a feasibility project along with several branches of the federal government, provincial government, Laurentian University and mining and forestry companies to determine if crops suitable for producing biodiesel fuel can be grown on mine tailings. The concept first came about when a biodiesel plant was proposed to be built in Sudbury. Although plans for the plant have been abandoned, the biodiesel crop project is still going ahead. Crops will be cultivated on 2 half-hectare plots on the CVRD Inco tailings in Sudbury, 1 half-hectare plot on the Xstrata Nickel tailings in Sudbury and 1 half-hectare plot on the Goldcorp tailings in Timmins. Paper sludge from St. Marys Paper Company in Sault Ste. Marie and Domtar in Espanola will be spread on the plots in January when the frozen ground is easier to work on with heavy equipment. In the spring, the plots will be seeded with corn, canola or soy, with the possibility of alder and willow in the future. Instruments to monitor groundwater on the sites will also be installed. Biodiesel produced with vegetable or meat oils has been touted as being an environmentally sound diesel fuel. Emissions from vehicles fueled by biodiesel are 40 to 100 per cent lower than those from conventional diesel engines. Proponents of the project emphasize the value of using marginal lands like mine tailings to grow crops for biodiesel fuel instead of prime agricultural land. There are 2,500 hectares of tailings in Sudbury that could be potentially used for this purpose, and about 2,000 hectares at one mine site in Timmins. A Sudbury-area farmer will provide advice about growing the crops and will also grow the same crops on a portion of his land for a comparative evaluation of crop yield. The paper sludge offers the benefit of allowing crops to be grown, but it also cuts off oxygen flow to the tailings underneath, thereby preventing sulphides in the tailings from rusting. The paper sludge may even help the

  20. Geologic map of the Tetilla Peak Quadrangle, Santa Fe and Sandoval counties, New Mexico

    Science.gov (United States)

    Sawyer, D.A.; Shroba, R.R.; Minor, S.A.; Thompson, R.A.

    2002-01-01

    This digital geologic map summarizes all available geologic information for the Tetilla Peak quadrangle located immediately southwest of Santa Fe, New Mexico. The geologic map consists of new polygon (geologic map units) and line (contact, fault, fold axis, dike, flow contact, hachure) data, as well as point data (locations for structural measurements, geochemical and geochronologic data, geophysical soundings, and water wells). The map database has been generated at 1:24,000 scale, and provides significant new geologic information for an area of the southern Cerros del Rio volcanic field, which sits astride the boundary of the Espanola and Santo Domingo basins of the Rio Grande rift. The quadrangle includes the west part of the village of La Cienega along its eastern border and includes the southeasternmost part of the Cochiti Pueblo reservation along its northwest side. The central part of the quadrangle consists of Santa Fe National Forest and Bureau of Land Management lands, and parts of several Spanish-era land grants. Interstate 25 cuts through the southern half of the quadrangle between Santa Fe and Santo Domingo Pueblo. Canada de Santa Fe, a major river tributary to the Rio Grande, cuts through the quadrangle, but there is no dirt or paved road along the canyon bottom. A small abandoned uranium mine (the La Bajada mine) is found in the bottom of the Canada de Santa Fe about 3 km east of the La Bajada fault zone; it has been partially reclaimed. The surface geology of the Tetilla Peak quadrangle consists predominantly of a thin (1-2 m generally, locally as thick as 10? m) layer of windblown surficial deposits that has been reworked colluvially. Locally, landslide, fluvial, and pediment deposits are also important. These colluvial deposits mantle the principal bedrocks units, which are (from most to least common): (1) basalts, basanites, andesite, and trachyte of the Pliocene (2.7-2.2 Ma) Cerros del Rio volcanic field; (2) unconsolidated deposits of the Santa

  1. Subjective nutritional val oration generated by the patient in the hematology oncology users

    International Nuclear Information System (INIS)

    Andrada, D.

    2004-01-01

    Everybody knows that all protein calorie malnutrition is not only the cause of death in cancer patients but also affects the good performance treatment as well as their quality of life. Because of that common complication, it is necessary the use of simple tools to detect its occurrence. A recent study called NUPAC perceive that 52% of patients in advanced stages presents protein calorie malnutrition. The tool used was the subjective global valuation which is generated by the patient and is based on clinical parameters. The Eastern Cooperative Oncology Group showed that a weight loss predicts the treatment response reducing the survival and quality of life. In 2002 a study carried out in the Nutritional Support Unit, University Hospital Vall d'Hebron in Barcelona recorded that at admission only 16,7% of patients were within normal nutritional values, 38.9% were undernourished moderate and 44.4% severe malnutrition, nutritional assessment at discharge showed no significant changes in relation to income hospital. 81.2% of these patient had a prescribed diet v / o of which 43.1% needed some supplements type and only 23% an artificial diet. The valuation method used was also generated by the subjective global valuation patient. Considering the impact that the nutritional status has in the evolution of neoplastic disease we saw the need to make a job using the above tool applied by personnel out of the nutrition in order to evaluate and identify patients who need or no simple nutritional intervention. Our study was conducted in the period of August-October in 2004 and included 50 users, of both sexes (26 males and 24 females) treated with polychemotherapy (which were excluded in the first series of MDT) and either ambulatory or hospitalized at transplant unit or conventional sector in Hematology-Oncology Service at the Asociacion Espanola Primera de Socorros Mutuos. Part of the questionnaire was completed by the own user and It also were performed by anthropometric

  2. Comportamento termomecânico de compósitos ativos preparados com nanocompósitos epóxi/argila organofílica e fios de liga Ni-Ti com memória de forma Thermomechanical behavior of active composites prepared with epoxy/organoclay nanocomposites and Ni-Ti shape memory alloy wires

    Directory of Open Access Journals (Sweden)

    Artur S. C. Leal

    2012-01-01

    Full Text Available Neste trabalho, nanocompósitos epóxi/argila organofílica foram selecionados como matriz por apresentarem valores de temperatura de transição vítrea (Tg e estabilidade térmica suficientemente alta para que fios de uma liga com memória de forma (LMF possam ser incorporados. Para tanto, quatro frações volumétricas de fios LMF de Ni-Ti (1,55, 2,56, 3,57 e 4,54% foram embebidas na matriz epoxídica diglicidil éter do bisfenol-A (DGEBA, reticulada com a amina aromática 4,4’-diamino difenil sulfona (DDS contendo 1 pcr da argila bentonita purificada organofiliada (APOC. A formação do nanocompósito foi confirmada por análise de difração de raio X, enquanto a transformação de fase dos fios de Ni-Ti foi determinada por análise dinâmico-mecânica (DMA. As amostras dos compósitos ativos preparados a partir da matriz de nanocompósito e fios de Ni-Ti foram caracterizadas principalmente por DMA. De acordo com os resultados obtidos foi constatada uma recuperação do módulo de armazenamento do compósito ativo durante o aquecimento na faixa de transformação de fase dos fios de Ni-Ti quando a fração volumétrica foi mantida em torno de 3,5%.In this work, epoxy/organoclay nanocomposites were selected as matrix for presenting high enough glass transition temperature (Tg and thermal stability values in order to be incorporated in shape memory alloys (SMA. Four volume fractions of SMA wires containing Ni-Ti (1.55, 2.56, 3.57 and 4.54% were embedded in diglycidyl ether of bisphenol A (DGEBA, cured with the aromatic amine 4,4’-diamino diphenyl sulfone (DDS and containing 1 phr of purified organobentonite (APOC. The formation of nanocomposite was confirmed by X ray diffraction analysis, while the phase transformation of Ni-Ti wires was determined by dynamic mechanical analysis (DMA. Samples of the active composites prepared from nanocomposite matrix and Ni-Ti wires were mainly characterized by DMA. A recovery of the storage modulus of

  3. Uso de sementes de Moringa oleifera para tratamento de águas superficiais The use of Moringa oleifera seeds for treatment of surface water

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    José E. S. Paterniani

    2009-12-01

    Full Text Available Visou-se, no presente trabalho, estudar o uso de sementes de Moringa oleifera para tratamento de água superficiais por filtração lenta direta em mantas sintéticas não tecidas e por sedimentação simples. Nos países em desenvolvimento, como o Brasil, as tecnologias para tratamento de água devem proporcionar às pessoas que habitam em regiões carentes de água potável, a possibilidade de sua clarificação, de maneira fácil, auto-sustentável e a baixo custo. Os estudos referidos no presente trabalho sugerem haver potencial de aplicação da Moringa oleifera. Utilizaram-se, no tratamento da água com Filtração Lenta Direta, um floculador constituído de garrafa Pet e três filtros, do mesmo material, com mantas sintéticas não tecidas, empregadas na filtração lenta, com vazão de água afluente aos filtros de aproximadamente 4 m³ m-2 d-1. No processo de tratamento de água em que se avaliou a eficiência da operação de sedimentação, o floculador era de garrafas pet e um tanque de sedimentação. A água bruta empregada na realização dos experimentos foi a água sintética obtida por Bentonita, a qual apresenta características qualitativas adequadas aos ensaios.This research had as its main purpose the evaluation of the use of natural coagulate, obtained from Moringa oleifera seeds and their efficiency in the slow direct filtration and sedimentation processes for the treatment of highly turbid water. In developing countries such as Brazil, technologies for water treatment must provide the possibility of water purification in an easy, self-maintainable and low cost process, for people who live in regions characterized by shortage of drinking water. Studies so far suggest that there is a potential application of Moringa oleifera in the water treatment with slow direct filtration. A flocker composed of a PET bottle and three filters composed of similar bottles with non-woven synthetic blanket were used in the slow filtration

  4. Desenvolvimento de filmes de nananocompósitos polipropileno/argila organofílica para embalagens Development of polypropylene/organoclay nanocomposite films for packaging

    Directory of Open Access Journals (Sweden)

    Arthur R. A. Araújo

    2012-01-01

    Full Text Available Neste trabalho foram preparados filmes de nanocompósitos de polipropileno (PP contendo 1% em massa de bentonita modificada organicamente com tecnologia nacional (APO. Polipropileno enxertado com anidrido maleico (PP-g-AM e copolímero de etileno e álcool vinílico (EVOH foram utilizados como agentes compatibilizantes. Os nanocompósitos foram preparados através da intercalação no estado fundido em extrusora de filme plano. A influência do tipo e do teor de compatibilizante e do tipo de polipropileno, na morfologia, propriedades mecânicas e de barreira ao vapor d'água dos referidos filmes foi investigada. Os dados de difração de raio X evidenciam que apesar da morfologia dos nanocompósitos ter sido afetada pelo tipo de compatibilizante, esta praticamente não variou com o teor de compatibilizante utilizado. As morfologias e as propriedades de barreira ao vapor d'água dos nanocompósitos preparados com os polipropilenos PP H401 e PP H07D-00 são semelhantes. Entretanto, aqueles preparados com PP H07D-00 apresentaram melhores propriedades mecânicas, excetuando a resistência da termossoldagem à tração, do que os preparados com a matriz polimérica PP H401, e a transparência dos nanocompósitos preparados com PP H07D-00 foi idêntica à da matriz polimérica sem argila. Os resultados indicam que os filmes de nanocompósitos PP H07D-00 compatibilizados com 15% de PP-g-AM e contendo 1% de argila organofílica APO podem ser promissores para aplicação em embalagens.This work deals with polypropylene (PP nanocomposite films containing 1 wt. (% bentonite clay organically modified with national technology (APO. Maleic anhydride grafted polypropylene (PP-g-MA and ethylene vinyl alcohol (EVOH were used as compatibilizing agents. Nanocomposites were prepared by melt intercalation in a flat film extruder. An investigation was made of the influence from the type and content of compatibilizer and type of polypropylene on the morphology

  5. Obtenção de argilas organofílicas purificadas através de tensoativos iônicos e não iônicos visando uso em fluidos de perfuração base óleo Getting purified organoclays by ionic and non-ionic surfactant aiming use in oil based drilling fluids

    Directory of Open Access Journals (Sweden)

    J. M. R. Costa

    2012-12-01

    Full Text Available Em perfurações de petróleo sensíveis ao contato com água, torna-se necessária a utilização de fluidos de perfuração base óleo. Nestes casos, utilizam-se argilas organofílicas, que são obtidas a partir de argilas bentoníticas purificadas e tratadas com a adição de tensoativos. A utilização do hidrociclone pode representar uma ferramenta eficiente e de custo acessível para purificar argilas naturais em escala industrial. Este trabalho tem por objetivo estudar a purificação de argilas bentoníticas utilizando-se um hidrociclone, visando o desenvolvimento de argilas organofílicas para uso em fluidos de perfuração base óleo. As caracterizações das amostras das argilas estudadas - Brasgel PA e Chocolate - foram efetuadas por meio das técnicas: análise granulométrica por difração de laser, difração de raios X (DRX e análise química por fluorescência de raios X. A caracterização das argilas organofílicas obtidas foi efetuada por meio dos seguintes métodos: DRX e por uma modificação do inchamento de Foster. Os resultados mostram que o processo de purificação foi eficiente na redução de impurezas presentes na bentonita e que a argila organofílica purificada tratada com Praepagen WB e Imidazolina Oléica Vegetal apresenta valores de inchamento de Foster em éster, óleo diesel e parafina superiores aos obtidos com argilas organofílicas sem purificação (natural, e evidenciando maior afinidade com o tensoativo Praepagen WB.Oil drilling in sensitive contact with water, becomes required the use of oil base drilling fluids. In these cases, organoclays are used, which are made from clay bentonite purified and treated with surfactants addition. The use of the hydrocyclone can be a effective tool and affordable for purifying clays in industrial scale. This work aims to study the purification of clays bentonite using a hydrocyclone, aiming to develop organoclays for use in oil base drilling fluids. The

  6. Performance, digestibility and morphometry of ileal villi of rabbits fed with levels of inclusion of “Lithothamnium” Desempenho, digestibilidade e morfometria da vilosidade ileal de coelhos alimentados com diferentes níveis de inclusão de “Lithothamnium”

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    Roberto Maurício Carvalho Guedes

    2010-03-01

    com os diferentes níveis de inclusão de Lithothamnium sp em substituição ao inerte (bentonita de dietas controle fornecidas ad libitum. O delineamento experimental para os ensaios de desempenho e digestibilidade foi inteiramente ao acaso, com cinco tratamentos e doze repetições. Para avaliação da morfometria da vilosidade ileal foram considerados apenas 20 animais distribuídos em um delineamento inteiramente ao acaso com cinco tratamentos e quatro repetições. As variáveis avaliadas foram submetidas às análises de variância e regressão com modelo pré-definido, mediante o programa estatístico SAEG. Os resultados demonstraram que a inclusão do Lithothamnium em diferentes concentrações não interferiu nas variáveis estudadas: consumo, coeficientes de digestibilidade da matéria seca, proteína e energia, ganho de peso, rendimento de carcaça e peso de vísceras comestíveis. Entretanto, o nível de inclusão de 1,0% afetou negativamente a largura e o comprimento das vilosidades ileais.

  7. Germinação de sementes de cenoura osmoticamente condicionadas e peletizadas com diversos ingredientes Germination of carrot seed primed and pelleted with several ingredients

    Directory of Open Access Journals (Sweden)

    Warley M Nascimento

    2009-03-01

    Full Text Available A semente de cenoura caracteriza-se por ser relativamente pequena, o que dificulta o processo de distribuição, tornando a mecanização por semeadeiras convencionais uma prática difícil. A técnica da peletização tem sido utilizada visando a melhoria da distribuição de sementes e o estabelecimento de plântulas no campo. As sementes peletizadas geralmente apresentam menor velocidade de germinação quando comparadas com as sementes nuas do mesmo lote. O condicionamento osmótico tem sido utilizado para aumentar a velocidade de germinação de sementes. Neste estudo foram avaliados materiais cimentantes para a peletização de sementes e verificadas as relações existentes entre o condicionamento osmótico e a germinação das sementes peletizadas de cenoura cv. Alvorada. A peletização foi feita utilizando-se, como material de enchimento, a mistura de microcelulose e areia fina em volumes iguais e, para enchimento foram avaliados cinco materiais cimentantes: bentonita, methocel, opadry, rhoximat e goma arábica. Sementes peletizadas receberam ou não o acabamento com iriodin. Uma testemunha (sementes nuas foi incluída no ensaio. Em outro estudo, sementes foram osmoticamente condicionadas em solução aerada de polietileno glicol e peletizadas imediatamente após o condicionamento osmótico ou após a secagem. Os produtos rhoximat e opadry apresentaram as melhores características como material cimentante, formando uma fina camada de revestimento, que resultou na formação de péletes com superfície lisa, uniforme e ótima aparência externa. Em geral, péletes apresentaram uma ligeira redução na porcentagem e na velocidade de germinação, em comparação às sementes não peletizadas, com diferenças maiores para os péletes que receberam o acabamento com iriodin. O condicionamento osmótico aumentou a velocidade de germinação das sementes peletizadas de cenoura.Carrot seeds are small and the distribution in the field by

  8. Tratamiento de salmueras de fermentación de aceitunas verdes

    Directory of Open Access Journals (Sweden)

    Garrido Fernández, A.

    1992-10-01

    de polisulfona de 1.000 daltons de corte molecular es lo más adecuado, trabajando a una presión de 18 bars. Un pretratamiento con bentonita (2 g/l, temperatura entre 30 y 45°G y la menor concentración inicial de polifenoles y sólidos en suspensión aumentan el rendimiento de forma considerable. En principio, un estudio económico aproximado de costes indica que la regeneración por cualquiera de los dos sistemas daría una salmuera regenerada a un precio algo inferior al obtenido al preparar el líquido de gobierno para envasar a partir de sus componentes.

  9. Avaliação da influência da casca no processamento de sucos clarificados de maçãs Fuji e Gala = Evaluating the influence of the peel in processing clarified Fuji and Gala apple juices

    Directory of Open Access Journals (Sweden)

    Eliane Dalva Godoy Danesi

    2007-01-01

    Full Text Available Devido ao aumento da produção de maçãs no Brasil, um excedente doconsumo in natura pode ser destinado à industrialização. Os sucos de maçãs são uma interessante alternativa de aproveitamento de frutas. Os componentes aromáticos estão distribuídos na fruta e o processamento pode influenciar a sua composição. Além disso, asenzimas responsáveis por escurecimento e off-flavor devem ser inibidas ou eliminadas para melhorar a qualidade dos sucos. Maçãs das variedades Fuji e Gala foram processadas com a casca e sem a casca para obtenção de sucos clarificados através de enzimas pectinolíticas e tratamento com gelatina e bentonita. As maçãs e os sucos obtidos foram submetidos a análises físico-químicas, microbiológicas, sensoriais e de rendimento. Os resultados das análises microbiológicas mostraram a eficiência do processamento e do tratamento térmico adotado. Pelo fato dos atributos físico-químicos e a aceitabilidade global, nos sucos com e sem a casca, não terem diferido de forma significativa (nível de significância de 5%, pode-se concluir que o processamento de sucos clarificados com a casca é o mais indicado, uma vez que assim obtêm-se rendimentos superiores.Due to an increase in the production of apples in Brazil, a surplus ofthe consumption in natura can be destined to the industrialization. Apple juices are an interesting alternative of using the fruits. The aromatic components are distributed in the fruit and the processing can influence their composition. Besides, the responsible enzymesfor darkening and off-flavor must be inhibited or eliminated to improve the quality of the juices. Apples of the Fuji and Gala varieties were processed with the peel and without the peel to obtain clarified juices through pectinolytics enzymes and treatment with gelatin and bentonite. The apples and the obtained juices were submitted to physical-chemistries, microbiological, sensorial and yield analyses. Results of the

  10. Soil Materials and Health: An new experience for teaching

    Science.gov (United States)

    Del Hoyo Martínez, Carmen

    2014-05-01

    clays in the field of the health is a source to develop numerous studies of cases in the teaching of different subjects related to the geoscience and a new opportunity to connect the learning with the reality. References -Carretero, MI 2002. Clay Minerals and Their Beneficial Effects upon Human Health. A review. Appl. Clay Sci. 21, pp. 155-163. -Choy, J.H., Choi, S.J., Oh, J.M., Park, T. 2007. Clay minerals and layered double hydroxides for novel biological applications. Appl. Clay Sci. 36 pp. 122-132. -Del Hoyo, C. 2007. Layered double hydroxides and human health: An overview. Appl. Clay Sci. 36, pp. 103-121. -Lopez-Galindo, A., Viseras Iborra, C. & Cerezo Gonzalez, P. 2005. Arcillas y salud. In: Conferencias de la XIX Reunion de la Sociedad Espanola de Arcillas. Rives, Ed., pp. 15-18.

  11. Puertollano IGCC Power Plant; Central de Gasificacion Integrada en Ciclo Combinado de Puertollano

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    The Puertollano IGCC Power Plant, rated 335 MW and located in Puertollano, Ciudad Real, in the central area of Spain, is a project led by ELCOGAS, a company incorporated by the European utilities ENDESA, ELECTRICITE DE FRANCE, IBERDROLA HIDROCANTABRICO ELECTRICIDADE DE PURTUGAL, ENEL and NATIONAL POWER and the technology and equipment suppliers SIEMENS, KRUPP UHDE and BABCOCK WILCOX ESPANOLA. IGCC technology is based in a process of coal gasification to obtain a clean combustion synthetic gas, integrated with a combined cycle, agas and steam, electricity-generating unit. The energy efficiency which is aimed to achieve at the Plant is 46% in ISO conditions. The Gasification unit uses the process of pressurised entrained flow for coal gasification. The gas is produced by the reaction of coal with oxygen at high temperatures, of up to 1600 degree centigree. This process is capable of gasifying a wide variety of types and qualities of coal for the production of a synthetic fuel gas. In the case of Puertollano, the raw fuel is a 50% mixture by weight of local coal and petroleum coke. The oxygen needed in the process and the nitrogen used for covering the fuel is generated in the Air Separation. The Gas Cleaning and Sulphur Recovery Unit clean the gases from contaminants and solid particles before to send them to the Gas Turbine. The clean gas is burnt in gas turbine of the Combined Cycle Plant, producing electricity. The exhaust gases feed a heat recovery steam generator, which produces steam used to generate additional electricity in a conventional steam turbine. The gas turbine is capable of operating both with synthetic gas and with natural gas, allowing operation flexibility. The net output of the plant up to December 1999 was 3.061 GWh, from them 344 GWh were produced with synthetic gas. This project has an important technological value, being the first power plant which uses coal gasification to feed a combined cycle in Spain and being also the biggest power plant

  12. A Cafe Scientifique for Teens

    Science.gov (United States)

    Hall, M.; Mayhew, M.

    2008-12-01

    It is well-known to those pursuing the quest to connect scientists to the public that an exceedingly hard-to- reach demographic is people of high school age. Typically, kids may tag along with their parents to museums until they reach adolescence, and then don't again appear in museums until they themselves have children. We have addressed this demographic challenge for free-choice-learning by developing a Cafe Scientifique program specifically for high school students. The Cafe Scientifique model for adults was developed in England and France, and has now spread like wildfire across the U.S. Typically, people come to a informal setting like a cafe, socialize and have food and drink, and then hear a short presentation by a scientist on a hot science topic in the news. This is followed by a period of lively discussion. We have followed this model for high school age students in four towns in northern New Mexico--Los Alamos, Santa Fe, Espanola, and Albuquerque--which represent a highly diverse demographic. We started this novel project with some trepidation, i.e. what if we build it and they don't come. But the program has proven popular beyond our expectations in all four towns. A part of the secret of success is the social setting, and-especially for this age group-the food provided. But we have also found that the kids are genuinely interested in the science topics, directing their own program, and interacting with scientists. We have often heard statements like, "I think it is important to be well-informed citizens". One of the most important aspects of the Cafes for the kids is to be able to discuss and argue about issues related to the science topic with the presenter and each other. It is an important part of the popularity that the Cafes do not involve school or parents, but also that we have strived to give the kids ownership of the program. Each town has a Youth Leadership Team-open to any teen-that discusses and prioritizes potential topics, conducts