Nivel de consumo diario de frutas y verduras en escolares con sobrepeso y obesidad del primer y segundo grado de primaria de la Institución Educativa Particular San Andrés. Lima. Mayo 2011

OpenAIRE

Alfaro, katherine

2013-01-01

Objetivos: Determinar el nivel de consumo diario de frutas y verduras en escolares con sobrepeso y obesidad de primer y segundo grado de nivel primario de la IEP San Andrés. Diseño: Estudio descriptivo, transversal, observacional y prospectivo. Institución: Institución Educativa Particular San Andrés. Participantes: Veintisiete escolares con sobrepeso y 33 con obesidad, de primer y segundo grado de nivel primaria. Intervenciones: Aplicación de formato de frecuencia de consumo de frutas y verd...

Survey of benthic dinoflagellates associated to beds of Thalassia testudinumin San Andres Island, Seaflower biosphere reserve, Caribbean Colombia

International Nuclear Information System (INIS)

Rodriguez E, Angelica; Mancera Pineda, J Ernesto; Gavio, Brigitte

2010-01-01

In order to determine the occurrence of epiphytic toxic dinoflagellates in the coastal waters of San Andres Island, Caribbean Colombia, we analyzed the sea grass beds on the northern and eastern sides of the island. We found seven species of toxicogenic dinoflagellates, belonging to the genera Prorocentrum and Ostreopsis. The cell densities were generally low if compared with previous studies in other Caribbean sites, ranging from 0 to 836 cells/dry weights. The species encountered are known to produce toxins causing the diarrheic shellfish poisoning and ciguatera, poisonings which have been documented in the island.

Uso y actitudes relacionados a las drogas en las estudiantes de enfermería de la Universidad Mayor de San Andrés Uso e atitudes relacionados às drogas em estudantes de enfermagem da Universidade Maior de San Andres Use and attitudes about drugs among nursing students at the Universidad Mayor de San Andres

Directory of Open Access Journals (Sweden)

Iblin Elizabeth Enriquez Flores

2004-04-01

Full Text Available Este trabajo representa los resultados del Uso y Actitudes relacionando el alcohol, tabaco, Hojas de coca, tranquilizantes y anfetaminas en Estudiantes de Enfermería de la Universidad Mayor de San Andrés. El objetivo es analizar las actitudes mediante el uso de diferentes substancias con aquellos que no usan en los últimos 12 meses. Los datos fueron recolectados en Agosto del 2002, utilizando un cuestionario auto administrado y distribuido, garantizando el anonimato. Se obtuvieron estos resultados: Las actitudes relacionadas a las drogas aprueban el uso de hojas de coca, uso de alcohol, uso de tranquilizantes y desaprueban el uso de cocaína. El uso personal de drogas en los últimos 12 meses corresponde a: hojas de coca diariamente, alcohol menos que una vez por semana y tabaco diariamente. El principal motivo de uso de estas drogas vinculase a la práctica religiosa; los estudiantes son introducidos por primera vez por familiares y por amigos/enamorados.Este trabalho representa os resultados do Uso e Atitudes relacionados ao álcool, tabaco, folhas de coca, tranqüilizantes e anfetaminas em estudantes de enfermagem da Universidade Mayor de San Andrés. O objetivo é analisar as atitudes mediante o uso das diferentes substâncias com aqueles que usaram ou não drogas nos últimos 12 meses. Os dados da amostra estratificada e intencional foram coletados em agosto de 2002, utilizando um questionário auto administrado distribuído para preservar o anonimato. Obtiveram-se estes resultados: as atitudes relacionadas às drogas demonstram a aprovação do uso das folhas de coca, álcool, tranqüilizantes e desaprovam o uso da cocaína. O uso pessoal de drogas nos últimos 12 meses corresponde a: às folhas de coca diariamente, ao álcool menos que uma vez por semana, e tabaco diariamente. O principal motivo do uso destas drogas vincula-se a prática religiosa; os estudantes são introduzidos pela primeira vez pelos familiares, pelos amigos

Santo André: Integración de Programas para Promover la Inclusión Social

OpenAIRE

Rosana Denaldi

2003-01-01

En este trabajo trataremos del programa "Santo André Más Igual", desarrollado desde 1998 en la ciudad de Santo André ubicada en la Región del Gran ABC, en la Región Metropolitana de San Pablo (RMSP) Brasil.

Estudios sobre los uredinales del archipiélago de San Andrés y providencia, Colombia.

Directory of Open Access Journals (Sweden)

Pardo Cardona Víctor Manuel

2003-12-01

Full Text Available Doce especies de Uredinales fueron colectados en las islas de San Andrés y Providencia durante una visita de colección efectuada en el mes de Octubre de 2002. Los hospederos fueron determinados y herborizados y a partir de ellos se elaboraron micropreparados que contenían los soros con las esporas de los hongos, los cuales fueron observados y estudiados al microscopio. Puccinia cyperi-tagetiformis Kem es nuevo registro para Colombia; se registró a Brachiaria distachya (L Stapf como nuevo hospedante de Uromyces clignyi Patouillard & Hariot y a Cyperus rotundus L como nuevo hospedante para P. cyperi-tagetiformis. Las demos especies colectados han sido registradas en el neotrópico sobre hospedantes previamente conocidos.

Velocidad de descomposición de la hojarasca en diferentes sustratos de manglar en San Andrés Isla, Caribe colombiano

Directory of Open Access Journals (Sweden)

Omar Alfonso Sierra Rozo

2007-01-01

foliar del manglar en la acumulación de sedimentos es indispensable para estimar la estabilidad de los habitats costeros frente a los cambios del nivel del mar e impactos ocasionados por eventuales disturbios naturales. Con base a los resultados obtenidos y aquéllos de trabajos previos relacionados con las tasas de productividad de hojarasca en los mismos humedales de estudio, se propone un modelo básico conceptualcuantitativo de la dinámica producción-descomposición de hojarasca en San Andrés isla.

ANGIOSPERM FLAG SPECIES FOR MANGROVE CONSERVATION IN San AndrÉs Island (colombia ARE HIGHLY VULNERABLE AND locally rare

Directory of Open Access Journals (Sweden)

Gloria Andrea Murcia

2016-01-01

Full Text Available El concepto de especies bandera ha sido empleado en proyectos de conservación por 50 años. Se proponen aquí cinco especies nativas de la Isla de San Andrés como especies bandera para la conservación de los pocos remanentes de manglar en esta Isla: Bontia daphnoides (Myoporaceae, Canella winterana (Canellaceae, Eustoma exaltatum (Gentianaceae, Rhabdadenia biflora (Apocynaceae y Selenicereus grandiflorus (Cactaceae. Cuatro de estas especies son documentadas aquí por primera vez para el Archipiélago, y tres representan los primeros reportes para la Flora de Colombia, dos de ellos (Canellaceae y Myoporaceae a nivel de familia.

Petrography, trace element geochemistry, and dolomitization model - Jhimpir dolomite, Sindh, Pakistan

International Nuclear Information System (INIS)

Naseem, S.; Sheikh, S.A.

2004-01-01

Dolomites of Jhimpir area have been examined petrographically and geochemically to observe and characterize the process and extent of dolomitization. These are petrographically classified as calcitic dolomite and dolomitic limestones. The texture of dolomite is idiotopic. Most of the dolomite rhombohedrons are fine to medium gained and zoned. The replacement of biomicritic carbonate rocks (Laki Limestone of Early Eocene age) by Mg and Fe-rich solutions is observed in thin section. Major and trace elements have been analyzed in order to assess the compatibility of these elements with dolomite. The average MgO content in the samples close to small fault is between 16 and 17 % and decreases from the fault outwards, down to 5 to 4 %. The Fe, Mn, Na and K contents exhibit a positive correlation with increasing dolomitization, whereas, it correlates inversely with Sr. This paper provides evidence that the dolomites of the Jhimpir area are derived from epigenetic replacement. (author)

Narcotráfico, violencia y crisis social en el Caribe insular colombiano: El caso de la isla de San Andrés en el contexto del Gran Caribe Drug Traffiking, Violence and the Social Crisis in Colombian Caribbean Islands: The Case of San Andrés Island in the Context of the Great Caribbean

Directory of Open Access Journals (Sweden)

Silvia Mantilla

2011-06-01

Full Text Available El presente artículo tiene por objetivo presentar un diagnóstico preliminar de la magnitud del tráfico de drogas, sus dinámicas, modalidades, y las condiciones sociales y económicas que favorecen el desarrollo de este negocio ilegal en la isla de San Andrés (Colombia. El análisis se desarrolla, no obstante, en el marco de la condición histórica y natural de "zona de tránsito" de drogas, armas y otros recursos ilegales, que se le atribuye a la región del Gran Caribe, entendida como un continuo geográfico, histórico y cultural en el que se observan patrones comunes en materia de amenazas a la seguridad, la geopolítica de las relaciones con Estados Unidos y los efectos sociales y económicos derivados del flagelo del narcotráfico. En este sentido, el caso de la isla de San Andrés (Colombia se examina más como parte de la dinámica insular gran caribeña que como parte de las tendencias propias del negocio en la Colombia continental, lo que permite, sin embargo, establecer las conexiones entre ambos espacios regionales -el insular y el continental- y, a la vez, evaluar el impacto regional del fenómeno a partir de las conexiones ilegales que desde el archipiélago se establecen con algunos países vecinos del Gran Caribe. Finalmente, se sostiene la hipótesis de que el fenómeno del narcotráfico se instala en la isla como resultado de factores geohistóricos, culturales y socioeconómicos que en conjunto han determinado la participación activa de distintos sectores de la sociedad en este negocio ilegal.The objective of thispaper is to present a preliminary diagnosis of the magnitude, dynamics, and modalities of drug trafficking, together with the social and economic conditions that support the development of this illegal activity in the island of San Andres (Colombia. Analysis is conducted within a framework that identifies this trafficking zone as a natural and historic corridor for trade in weapons, drugs, and other illicit

The Tonian Beck Spring Dolomite: Marine dolomitization in a shallow, anoxic sea

Science.gov (United States)

Shuster, Alice Mary; Wallace, Malcolm William; van Smeerdijk Hood, Ashleigh; Jiang, Ganqing

2018-06-01

The reason for the abundance of dolomite lithologies in Earth's early geological record compared to modern environments remains contentious. This study provides new insight into this Precambrian "dolomite problem" by revisiting one of the most controversial dolomite localities, the Beck Spring Dolomite, of Death Valley, USA. Consistent with some previous studies, petrographic evidence indicates that although the Beck Spring Dolomite now consists almost entirely of dolomite, it was originally precipitated largely as aragonite and high-Mg calcite. Depositional constituents (microbialites and ooids) were likely originally aragonitic, and early marine length-fast cements (now dolomite) are suggested to have precipitated as high-Mg calcite then replaced syntaxially by dolomite. Based on petrographic and geochemical evidence, we suggest that marine dolomitization was the dominant synsedimentary diagenetic process in the unit, and for the most part, involved syntaxial and mimetic replacement. Further, a length-slow fibrous dolomite generation was precipitated during the later stages of marine diagenesis as a primary marine dolomite cement. This is indicated by the length-slow crystallographic structure of the cement and from its preserved geochemical and cathodoluminescence growth zonation. This new evidence for Tonian marine dolomite precipitation reinforces the idea of Precambrian marine environmental conditions, including the chemical composition of seawater, promoting dolomite formation at this time. The trace metal geochemical composition of well-preserved marine components, especially dolomite marine cements, reveals information about redox conditions in this Tonian shallow seawater. In terms of rare earth element geochemistry, the Beck Spring Dolomite has no significant Ce anomaly, and a ubiquitous positive Eu anomaly, consistent with widespread oceanic anoxia during deposition. Furthermore, the relatively low levels of iron and chalcophile elements Co, Cu, Pb and

Descripción morfoagronómica de materiales de plátano (Musa AAB, ABB y banano (Musa AAA cultivados en San Andrés Isla Morpho-agronomic Description of Plantain (Musa AAB, ABB and Banana (Musa AAA Materials Grown in San Andres Island

Directory of Open Access Journals (Sweden)

Oscar Javier Parra Pachón

2009-10-01

Full Text Available Durante el primer semestre de 2005 se estudiaron los cultivares de plátano y banano en fincas y parcelas de 15 agricultores típicos participantes en programas conjuntos de la Secretaría de Agricultura y Pesca de San Andrés Isla y de la Universidad Nacional de Colombia sede Caribe. A partir de descriptores de INIBAP, IPGRI y CIRAD y revisiones bibliográficas.se describen morfológicamente los materiales de Musa cultivados en la Isla, así como las prácticas de los productores isleños, Se identificaron cuatro clones del subgrupo plátano (Musa AAB: un Hartón (‘Horse’ y tres Dominico-Hartón (‘Tallo Negro’, ‘Tallo Blanco’ y ‘Cincuenta’ del subgrupo ABB se hallaron un material de Bluggoe (‘Boscó’ y un Felipita. El subgrupo banano AAA presentó dos materiales Gros Michel (denominados Común y Chino y uno de banano (Rojo. El plátano tiene gran importancia para los agricultores de la Isla, siendo el Boscó el clon más aceptado entre consumidores por su adaptación a las condiciones edafológicas y climáticas. El banano es menos cultivado; ya que los suelos, el clima y las enfermedades como sigatoka negra, condicionaron el desarrollo de clones. El trabajo sugiere prácticas de fácil implementación que podrían aumentar la producción en los sistemas de huerto mixto tropical que predominan en la Isla.During the first semester, 2005 we studied the plantain and banana cultivars in small farms of 15 volunteer regular producers, who were participating in joint programs of the Agriculture and Fisheries Secretariat of San Andres Island and the Colombian National University Caribbean Headquarters. We described morphologically the Musa cultivars identified in the island, as well as agricultural practices of the island producers, using the INIBAP, IPGRI and CIRAD (1996 descriptors and bibliographical reviews. We identified four clones within the plantain sub-group Musa AAB: a Horn type and three French-Horn; and within the ABB

Peapiiskop Andres Põderi jutlus / Andres Põder

Index Scriptorium Estoniae

Põder, Andres, 1949-

2005-01-01

Peapiiskop Andres Põderi jutlus oma ametissepühitsemise jumalateenistusel 2. veebruaril. Ilmunud ka: Põder, Andres. Pärimuste pöördepunkt : kõned ja kirjutised. - Tallinn : Kunst, 2007, 107-112

Fabric Preserving and Fabric Destroying Dolomitization: A case of Seawater Dolomitization

Directory of Open Access Journals (Sweden)

Alham Jassim Al-Langawi

2006-06-01

Full Text Available This study is based on field, petrographic and geochemical investigations of Hajar Supergroup autochthonous rocks: Ruus Al Jibal Group- Musandam Peninsula, and Akhdar Group- Jebel Akhdar, Oman and U.A.E., and para-autochthonous Maqam Formation-Sumeini Group-Jebel Sumeini-U.A.E.  Petrographic evidence indicates that the rocks were deposited in a shallow marine shelf environment, particularly tidal flat, lagoon, reef, back-reef and shoal environments that were part of the Arabian Platform during Permian and Triassic times. However, they are almost entirely dolomitized and the rocks show different petrographic features ranging from perfect preservation of original texture by mimetic dolomitization to complete obliteration and destruction of the original limestones giving rise to inequicrystalline and equicrystalline fabrics.  Dolomites analyzed by geochemical methods were categorized on the basis of textural variations; crystal size, shape and impurity or inclusion distribution within crystals, and whether these crystals are found as rock forming (replacive or cements. The dolomites display variations in stoichiometry, ordering and trace element concentrations indicating differences in dolomitizing fluid chemistry and recrystallization stages that prevailed through time. It indicates also that although dolomitization is pervasive, dolomites are petrographically and chemically immature. All the petrographic and geochemical evidence strongly indicates seawater and/or mixing zone dolomitization which may have been initiated soon after deposition of the host sediments.  Rocks showing preservation of allochems as well as the marine cements by mimetic dolomite crystals, suggest that dolomitization was early (at shallow depths with very active marine-water circulation and occurred in a relatively short time.  Evidence from crystalline dolomites indicates several crystallization events at shallow burial depths, under marine waters modified by increased

Valoración del servicio ambiental hidrológico en el sector doméstico de San Andrés Tuxtla, Veracruz, México

OpenAIRE

Ana Lid del Ángel Pérez; Andrés Rebolledo Martínez; José Alfredo Villagómez Cortés; Rigoberto Zetina Lezama

2009-01-01

Entre las iniciativas de conservación en México, existe un programa de pago por servicios ambientales en áreas de gran importancia por sus valores ecológicos. Un caso es el de San Andrés Tuxtla, Veracruz, donde el pago no representa una opción económica sostenible a los dueños de predios, por lo que deberá incorporarse también el reconocimiento social. El objetivo del trabajo fue obtener el valor del bosque y paisajes alternativos en la población que recibe sus beneficios en forma de agua. Se...

Identidades ambientales, un caso comparativo entre el Trapecio amazónico y el Archipiélago de San Andrés

Directory of Open Access Journals (Sweden)

Pablo De La Cruz

2014-01-01

Full Text Available A partir de la definición de identidad ambiental, el artículo compara los procesos de transformación identitaria que han tenido lugar en el Trapecio amazónico colombiano y en el Archipiélago de San Andrés, por cuanto son dos casos de redefinición histórica de la etnicidad con referencia al medio geográfico, al encuentro con la colombianidad, a la agudización del discurso y a las tensiones que los capitales y los agentes institucionales generan en torno a lo tradicional. Se analiza el creciente turismo, la influencia de las agencias de cooperación y sus efectos en el desplazamiento de lo sagrado hacia una “cultura teatral”.

San Andres, Providence and Santa Catalina: a challenge of sustainable development

International Nuclear Information System (INIS)

Rodriguez S, Liliana

2003-01-01

Satisfactorily to implement the postulates of Biosphere Reserve Sea flower in the Archipelago of San Andres, Providencia and Santa Catalina demands to conjugate national, regional and local efforts in order to surpass the complex economic and social situation untied in this zone of the country after the loss of competitiveness and benefits that the model of Free Port meant to him from 1953 and which they have let perceive itself from principles of the Nineties when Colombia adopted the economic opening like development policy, changes that have resulted in the deterioration of the natural resources and the atmosphere of the islands and finally in the quality of life of their inhabitants and that imposes to this zone of the national territory the challenge to reach the balance man-nature that implies the concept of Biosphere Reserve, category acquired by the Archipelago before UNESCO in the 2000 The absence of agreed economic model with geographic, space, social, cultural and environmental conditions of the Archipelago, together with factors like: (i) political national that does not know the particularities and specificities of this zone of the country, (ii) inter institutional lack of joint in the different levels from the public administration which they concur there, (iii) absence of operation of the Gobernacion Departamental like administrator of the regional public management, (IV) absence of effectiveness population policy to control their indiscriminate increase and (v) lack of social conscience of inhabitants as visitors of the islands with respect to the adapted use of their natural resources and its constitutional and legal obligations to participate in the management like executors or veedors, among other aspects, jeopardizes their development in order to reach the environmental sustainability

Microbial Inoculantes Effects on Growth Promotion of Mangrove and Citrullus vulgaris San Andrés Isla, Colombia

Directory of Open Access Journals (Sweden)

Tania Galindo

2006-01-01

Full Text Available In order to test the effect of two microbial inoculants (obtained from red and black mangrove roots on the growth and stability of mangrove and watermelon plants, four treatments were carried out in San Andres Island, Colombia. The treatments consisted in the application of the inoculants in: A. germinans propagules collected in a mangrove area, and then individually planted in gavels with sun-pasteurized soil (in order to decrease the microbial load, A. germinans and R. mangle plants collected in the proximity of nursery trees, A. germinans and R. mangle planted and maintained in nursery, and in Citrullus vulgaris seeds planted in a traditional cultivar without chemical fertilizers. The growth and vegetative development variables were: number of nodes, number of leaves and steam length. The inoculants (phosphate solubilizing microorganisms -PSM- and nitrogen fixing bacteria -NFB- were applied in the mentioned vegetable material, doing measures during three months. The results show a positive effect on growth measured by steam length in plants treated specifically with the inoculants in C. vulgaris and A. germinans seedlings maintained in nursery.

A "coca-cola" shape: cultural change, body image, and eating disorders in San Andrés, Belize.

Science.gov (United States)

Anderson-Fye, Eileen P

2004-12-01

Eating disorders have been associated with developing nations undergoing rapid social transition, including participation in a global market economy and heavy media exposure. San Andrés, Belize, a community with many risk factors associated with the cross-cultural development of eating disorders, has shown remarkable resistance to previously documented patterns, despite a local focus on female beauty. Drawing on longitudinal person-centered ethnography with adolescent girls, this article examines why this community appears exceptional in light of the literature. First, community beauty and body image ideals and practices are explicated. Then, a protective ethnopsychology is proposed as a key mediating factor of the rapid socio-cultural change among young women. Finally, possible nascent cases of eating disordered behavior are discussed in light of their unique phenomenology: that is, having to do more with economic opportunity in the tourism industry and less with personal distress or desire for thinness. Close, meaning-centered examination of eating and body image practices may aid understanding and prevention of eating disorders among adolescents undergoing rapid social change in situations of globalization and immigration.

Proyecto de un servicio funcional a prestar en una biblioteca universitaria: “El Servicio de Información Departamental” de la Biblioteca Max von Buch (Universidad de San Andrés = Project of a functional service to be provided in an university library: "The Departmental Information Service" of the Max von Buch Library (Universidad de San Andrés

Directory of Open Access Journals (Sweden)

Moira Guppy

2001-06-01

Full Text Available Este trabajo –elaborado para el Seminario “La organización de los Servicios al Público en la Biblioteca” (UBA, 1998- describe el proyecto de un servicio a desarrollar en la Biblioteca Max von Buch de la Universidad de San Andrés. El “Servicio de Información Departamental” ofrecerá a los docentes e investigadores acceso a los recursos disponibles dentro de su área temática (Internet, bases de datos, índices de artículos de publicaciones periódicas, revistas en texto completo, series estadísticas, etc. Estará elaborado en dos formatos: un cd-rom actualizado periódicamente, y una página Web en línea especialmente diseñada. Con la implementación de este servicio se logrará un gran ahorro de tiempo en la búsqueda, análisis, tratamiento y difusión de la información destinada a la investigación académica = This paper –presented at the seminary “Public Services Organization at the Library”- describes a project to be developed at the Max von Buch Library, Universidad de San Andrés. The “Academic Information Service” would be design to provide access to researchers and faculty to all the resources available whithin each discipline and research area in the Internet, databases, periodical indexes, full text periodicals, statistical data, etc. They will gain access to it from a cd-rom which would be updated periodically, and a web page specially designed. The implementation of this project would provide faculty with qualified information along with considerable time saving in their researches.

Contabilidad y cobros de rentas en la Santa Capilla de San Andrés de Jaén. Dos siglos y medio tras la búsqueda de la eficiencia (1650-1900). (Accounting and income collection at the Santa Capilla de San Andrés in Jaén. Two and a half centuries in search of efficiency (1650-1900).

OpenAIRE

Lillo Criado, Juan Luis; Álvarez López, José Mª Carlos

2006-01-01

La Santa Capilla de San Andrés de Jaén es una institución benéfica que tiene sus orígenes en 1515 y aún pervive. Su contabilidad, establecida para la rendición de cuentas por parte del receptor, se sustentó en el método de cargo y data y en diversos libros necesarios, tales como los de hacienda, de gastos de meses o el cuaderno de no cobrados. En este trabajo, sobre la base del análisis de la enorme cantidad de datos que suministran sus cuentas entre 1650 y 1900, hemos estudiado la función de...

El arte de la conversión: modelos educativos del Colegio de San Andrés de Quito

Directory of Open Access Journals (Sweden)

Andrea Lepage

2007-06-01

Full Text Available El ensayo analiza el papel que desempeñó el Colegio de San Andrés de Quito en la conversión de los indígenas durante el siglo XVI y el florecimiento de un centro importante de producción artística. El artículo propone que la designación actual del colegio, como una escuela de arte, puede ser una consecuencia tardía de la inestable relación entre arte y religión, tal como fue cultivada dentro de la institución franciscana. Se trató, por lo tanto, de una superposición del valor religioso sobre el artístico, mediante el cual se adoctrinaba a los estudiantes. El artículo enfatiza en la apropiación de destrezas artísticas por parte de los indígenas, quienes adquirieron dominio sobre estas artes, las mercadearon y provocaron una inesperada tensión en las concepciones franciscanas acerca de la religión y el uso del arte.

Dolomitic lime containing hydraulic additive

International Nuclear Information System (INIS)

Lagzdina, S.; Sedmalis, U.; Bidermanis, L.; Liepins, J.; Grosvalds, I.

1997-01-01

To obtain qualitative dolomitic lime the optimum calcination temperature of dolomite containing about 9 % of clayey substances is 900 deg C. The mechanical strength of dolomitic lime containing 30 % of brick waste additive after 6-9 months of hardening is 1.4-1.5 times higher than that of samples without hydraulic additive, for calcium lime - 2.2-2.6 times higher. Generally the mechanical strength of dolomitic lime is higher than that one of calcium lime. It can be explained by the active role of MgO in the hydration and hardening processes of dolomitic lime. Xray diffraction phase analysis was performed by X-ray diffractometer DPON-3M with Cu-K α emission filter

La Biblioteca Max von Buch de la Universidad de San Andrés y sus investigadores: Segunda parte de Un estudio de las necesidades de información, hábitos y características de Investigadores en Humanidades y Ciencias Sociales The Max von Buch library of the Universidad de San Andres and its researchers: Second part of A study of the information needs, habits and characteristics of Humanities and Social Science Researchers

Directory of Open Access Journals (Sweden)

Irene Münster

2003-12-01

Full Text Available Tal como fue mencionado en el artículo anterior el presente estudio fue elaborado con el propósito de entender e identificar las necesidades, el proceso de búsqueda de información, las características y los hábitos de los investigadores en Humanidades y Ciencias Sociales de la Universidad de San Andrés (UdeSA. En esta segunda parte del mismo se ha intentado identificar y evaluar su conducta en la Biblioteca Max von Buch de la Universidad a través del uso de los servicios que ésta les ofrece. Se ponen a consideración los resultados de una encuesta realizada, de la que se adjunta la segunda parte del formulario, con el fin de detectar sus necesidades de información.As mentioned in the previous article, the present study was conducted to understand and identify the characteristics, needs and habits of research from the Humanities and Social Sciences researchers at the Universidad de San Andres (UdeSA. This second part tries to identify and evaluate their performance at the Max von Buch library of the University through the services that it provides them. The results of the survey are presented, together with the second part of the questionnaire, with the aim of identifying information needs.

El fantasma de la puta-peluquera: Género, trabajo y estilistas trans en Cali y San Andrés Isla, Colombia

Directory of Open Access Journals (Sweden)

Jeanny Lucero Posso

Full Text Available Resumen: A través de un uso crítico de la perspectiva de la interseccionalidad, la investigación etnográfica y exploratoria analiza las imbricaciones del género, la clase social, la etnicidad y la sexualidad en las trayectorias laborales de un conjunto de estilistas transfemeninas en Santiago de Cali y San Andrés Isla, Colombia. Las distancias sociales que se construyen entre diferentes actores (estilistas gais, estilistas de clase alta blancos heterosexuales, personas raizales heterosexuales y la clientela cisgénero producen de manera específica los sentidos otorgados al trabajo en las peluquerías y sus fronteras difusas con la prostitución. Si por un lado el efecto de clase y la dominación cisgenerista imposibilitan el ascenso social de las mujeres trans caleñas, el tabú heterosexista del sistema étnico prohíbe y niega las feminidades trans como parte de la identidad raizal.

A urolith of biogenic dolomite - another clue in the dolomite mystery

Science.gov (United States)

Mansfield, Charles F.

1980-06-01

A male Dalmatian, Canis familiaris, produced uroliths of almost pure dolomite, 3-8 mm across, in his urinary bladder in less than 8 months at 38°C and about 1 atm. The X-ray diffractogram identified the predominant mineral as dolomite, and the sharp (01.5) peak showed it is ordered dolomite, not the disordered form, protodolomite. Geochemically and biologically plausible causes include (1) renal, respiratory, or metabolic alkalosis, (2) infection by urease-producing (urea-splitting) fungi or bacteria and (3) infection by uric acid-fermenting bacteria. Hematological, bacteriological, urological and geochemical considerations most strongly implicate infection by either anaerobic, urease-producing bacteria or anaerobic, uric acid-fermenting bacteria. The physical and chemical conditions of this urinary system more closely approximate modern and inferred ancient carbonate depositional settings than most previous laboratory experiments, especially in terms of temperature, pressure, total salinity and, possibly, biota. The presence of urease-producing and/or uric acid-fermenting bacteria in urea- and/or acid-containing sediment, such as fecal pellets and algal mats, could promote formation of authigenic dolomite or other carbonates.

Reaction kinetics of dolomite rim growth

Science.gov (United States)

Helpa, V.; Rybacki, E.; Abart, R.; Morales, L. F. G.; Rhede, D.; Jeřábek, P.; Dresen, G.

2014-04-01

Reaction rims of dolomite (CaMg[CO3]2) were produced by solid-state reactions at the contacts of oriented calcite (CaCO3) and magnesite (MgCO3) single crystals at 400 MPa pressure, 750-850 °C temperature, and 3-146 h annealing time to determine the reaction kinetics. The dolomite reaction rims show two different microstructural domains. Elongated palisades of dolomite grew perpendicular into the MgCO3 interface with length ranging from about 6 to 41 µm. At the same time, a 5-71 µm wide rim of equiaxed granular dolomite grew at the contact with CaCO3. Platinum markers showed that the original interface is located at the boundary between the granular and palisade-forming dolomite. In addition to dolomite, a 12-80 µm thick magnesio-calcite layer formed between the dolomite reaction rims and the calcite single crystals. All reaction products show at least an axiotactic crystallographic relationship with respect to calcite reactant, while full topotaxy to calcite prevails within the granular dolomite and magnesio-calcite. Dolomite grains frequently exhibit growth twins characterized by a rotation of 180° around one of the equivalent axis. From mass balance considerations, it is inferred that the reaction rim of dolomite grew by counter diffusion of MgO and CaO. Assuming an Arrhenius-type temperature dependence, activation energies for diffusion of CaO and MgO are E a (CaO) = 192 ± 54 kJ/mol and E a (MgO) = 198 ± 44 kJ/mol, respectively.

Despedida al maestro Arturo Andrés Roig (1922 – 2012

Directory of Open Access Journals (Sweden)

Enrique Dussel

2015-07-01

Full Text Available En ocasión del fallecimiento de Arturo Andrés Roig (Doctor Honoris Causa por las Universidades Nacional de Río Cuarto, Argentina; Nacional de San Luis, Argentina; Autónoma de Managua, Nicaragua. Profesor Honorario en las Universidades Nacional del Comahue -Argentina-, y Andina Simón Bolívar -Ecuador- queremos sumarnos a la larga serie de homenajes que ha recibido. Para ello, reproducimos aquí tres memoriales dedicados al maestro por filósofos americanos.

Andres Noormets - olemuselt luuletaja, vormilt lavastaja / Andres Noormets ; intervjueerinud Tiiu Laks

Index Scriptorium Estoniae

Noormets, Andres, 1963-

2010-01-01

Andres Noormets endast, oma lavastustest, näitlemisest ja lavastamisest, elu mõttest, uue otsimisest oma teatritöödega, sellest, mis endiselt paelub teatris ja praegusi teatritegemisi enim mõjutab, ise kirjutamisest jm. Andres Noormetsa eluloolisi andmeid

Dolomite decomposition under CO2

International Nuclear Information System (INIS)

Guerfa, F.; Bensouici, F.; Barama, S.E.; Harabi, A.; Achour, S.

2004-01-01

Full text.Dolomite (MgCa (CO 3 ) 2 is one of the most abundant mineral species on the surface of the planet, it occurs in sedimentary rocks. MgO, CaO and Doloma (Phase mixture of MgO and CaO, obtained from the mineral dolomite) based materials are attractive steel-making refractories because of their potential cost effectiveness and world wide abundance more recently, MgO is also used as protective layers in plasma screen manufacture ceel. The crystal structure of dolomite was determined as rhombohedral carbonates, they are layers of Mg +2 and layers of Ca +2 ions. It dissociates depending on the temperature variations according to the following reactions: MgCa (CO 3 ) 2 → MgO + CaO + 2CO 2 .....MgCa (CO 3 ) 2 → MgO + Ca + CaCO 3 + CO 2 .....This latter reaction may be considered as a first step for MgO production. Differential thermal analysis (DTA) are used to control dolomite decomposition and the X-Ray Diffraction (XRD) was used to elucidate thermal decomposition of dolomite according to the reaction. That required samples were heated to specific temperature and holding times. The average particle size of used dolomite powders is 0.3 mm, as where, the heating temperature was 700 degree celsius, using various holding times (90 and 120 minutes). Under CO 2 dolomite decomposed directly to CaCO 3 accompanied by the formation of MgO, no evidence was offered for the MgO formation of either CaO or MgCO 3 , under air, simultaneous formation of CaCO 3 , CaO and accompanied dolomite decomposition

Conocimiento sobre el fenómeno de las drogas en entre estudiantes y docentes de la Facultad de Medicina Universidad Mayor de San Andrés, La Paz, Bolivia Conhecimento sobre o fenômeno das drogas entre estudantes e docentes da Faculdade de Medicina da Universidade Mayor de San Andrés, La Paz, Bolívia Knowledge on drugs phenomenon by students and faculty from the Medical School at Universidad Mayor de San Andrés, La Paz, Bolivia

Directory of Open Access Journals (Sweden)

Maria del Pilar Navia-Bueno

2011-06-01

Full Text Available El objetivo de este estudio fue identificar el grado de conocimiento de los estudiantes y docentes de salud sobre drogas lícitas e ilícitas, relacionadas a: tipo, clasificación, acción, mecanismos, daños, consecuencias y efectos adversos además del uso y consumo. El diseño metodológico fue de "corte transversal, con una muestra de 172 estudiantes, profesores y residentes de las áreas de medicina y enfermería de la Universidad Mayor de San Andrés (UMSA, en Bolivia. Los resultados revelan que existe una debilidad en cuanto al conocimiento en relación a la clasificación de sustancias psicotrópicas de acuerdo con la estructura, propiedad química y efectos que producen en la salud, destacándose una diferencia significativa del conocimiento sobre drogas lícitas, como el alcohol y tabaco, con las drogas ilícitas. Se resalta el desconocimiento en todo el grupo estudiado sobre drogas lícitas e ilícitas, consecuencias y efectos adversos, lo que confirma la necesidad de mejorar la enseñanza en este contenido en las escuelas de salud.O objetivo deste estudo foi identificar o grau de conhecimento dos estudantes e professores da área da saúde sobre drogas lícitas e ilícitas, em relação ao tipo, classificação, mecanismos de ação, danos, consequências e efeitos adversos, decorrentes de seu consumo. Trata-se de estudo de coorte transversal, com amostra de 172 estudantes, professores e residentes das áreas de medicina e enfermagem da Universidad Mayor de San Andrés (UMSA, Bolívia. Os resultados revelam baixo nível de conhecimento dos sujeitos da investigação, relacionado à classificação de substâncias psicotrópicas, quanto à estrutura, propriedade química e efeitos que produzem na saúde, destacando-se diferença significativa entre o conhecimento sobre drogas lícitas, como álcool e tabaco, e drogas ilícitas. Ressalta-se o desconhecimento de todos os sujeitos da investigação sobre drogas lícitas e il

Narcotráfico, violencia y crisis social en el Caribe insular colombiano: El caso de la isla de San Andrés en el contexto del Gran Caribe

Directory of Open Access Journals (Sweden)

Silvia Mantilla

2011-01-01

Full Text Available El presente artículo tiene por objetivo presentar un diagnóstico preliminar de la magnitud del tráfico de drogas, sus dinámicas, modalidades, y las condiciones sociales y económicas que favorecen el desarrollo de este negocio ilegal en la isla de San Andrés (Colombia. El análisis se desarrolla, no obstante, en el marco de la condición histórica y natural de “zona de tránsito” de drogas, armas y otros recursos ilegales, que se le atribuye a la región del Gran Caribe, entendida como un continuo geográfico, histórico y cultural en el que se observan patrones comunes en materia de amenazas a la seguridad, la geopolítica de las relaciones con Estados Unidos y los efectos sociales y económicos derivados del flagelo del narcotráfico. En este sentido, el caso de la isla de San Andrés (Colombia se examina más como parte de la dinámica insular gran caribeña que como parte de las tendencias propias del negocio en la Colombia continental, lo que permite, sin embargo, establecer las conexiones entre ambos espacios regionales - el insular y el continental - y, a la vez, evaluar el impacto regional del fenómeno a partir de las conexiones ilegales que desde el archipiélago se establecen con algunos países vecinos del Gran Caribe. Finalmente, se sostiene la hipótesis de que el fenómeno del narcotráfico se instala en la isla como resultado de factores geohistóricos, culturales y socioeconómicos que en conjunto han determinado la participación activa de distintos sectores de la sociedad en este negocio ilegal.

Proyecto de un servicio funcional a prestar en una biblioteca universitaria: "El Servicio de Información Departamental" de la Biblioteca Max von Buch (Universidad de San Andrés

Directory of Open Access Journals (Sweden)

Moira Guppy

2001-06-01

Full Text Available Este trabajo -elaborado para el Seminario "La organización de los Servicios al Público en la Biblioteca" (UBA, 1998- describe el proyecto de un servicio a desarrollar en la Biblioteca Max von Buch de la Universidad de San Andrés. El "Servicio de Información Departamental" ofrecerá a los docentes e investigadores acceso a los recursos disponibles dentro de su área temática (Internet, bases de datos, índices de artículos de publicaciones periódicas, revistas en texto completo, series estadísticas, etc. Estará elaborado en dos formatos: un cd-rom actualizado periódicamente, y una página Web en línea especialmente diseñada. Con la implementación de este servicio se logrará un gran ahorro de tiempo en la búsqueda, análisis, tratamiento y difusión de la información destinada a la investigación académica.This paper -presented at the seminary "Public Services Organization at the Library"- describes a project to be developed at the Max von Buch Library, Universidad de San Andrés. The "Academic Information Service" would be design to provide access to researchers and faculty to all the resources available whithin each discipline and research area in the Internet, databases, periodical indexes, full text periodicals, statistical data, etc. They will gain access to it from a cd-rom which would be updated periodically, and a web page specially designed. The implementation of this project would provide faculty with qualified information along with considerable time saving in their researches.

Chemical composition and strength of dolomite geopolymer composites

Science.gov (United States)

Aizat, E. A.; Al Bakri, A. M. M.; Liew, Y. M.; Heah, C. Y.

2017-09-01

The chemical composition of dolomite and the compressive strength of dolomite geopolymer composites were studied. The both composites prepared with mechanical mixer manufactured by with rotor speed of 350 rpm and curing in the oven for 24 hours at 80˚C. XRF analysis showThe dolomite raw materials contain fewer amounts of Si and Al but high Ca in its composition. Dolomite geopolymer composites with 20M of NaOH shows greater and optimum compressive strength compared to dolomite geopolymer with other NaOH molarity. This indicated better interaction of dolomite raw material and alkaline activator need high molarity of NaOH in order to increase the reactivity of dolomite.

Weathering of dolomite in industrial environments

International Nuclear Information System (INIS)

Gauri, K.L.; Tambe, S.S.; Caner-Saltik, E.N.

1992-01-01

To the exclusion of other major atmospheric pollutants, sulfur dioxide is mainly responsible for attack upon dolomite. This article characterizes Laurel Dolomite on the basis of composition, texture, and porosity; describes the mechanism of the SO 2 reaction with dolomite; and develops two equations for the prediction of the rate of decay of dolomite. Over a period of 120 yr nearly 3.57 mm surface reduction at protected areas and 0.915 mm surface reduction at unprotected surfaces of a building in Louisville was calculated. However, these values could not be verified because measurement of these quantities in the field cannot be made

Andres Ellamaa : suurperede seostamine asotsiaalsusega mõjub koletislikult / Andres Ellamaa ; interv. Indrek Veiserik

Index Scriptorium Estoniae

Ellamaa, Andres, 1944-

2008-01-01

Vestlus doktor Andres Ellamaaga suurperede toetamisest, kunstlikust viljastamisest. Lisaks: Kuidas kommenteerite dr. Andres Ellamaa 2. juuni Postimehes ilmunud artikli järel tekkinud diskussiooni avalikkuses ja meedias? Kommenteerivad Tallinna Arstide Liidu juhatuse liige Peeter Mardna ja Jõgeva haigla juhataja Peep Põdder

Suursaadik Andres Talvik : Prantsusmaa ei ole euroliidu laienemise pooldaja / Andres Talvik ; interv. Marianne Mikko

Index Scriptorium Estoniae

Talvik, Andres, 1947-

2002-01-01

Eesti suursaadik Prantsusmaal Andres Talvik Prantsusmaa presidendivalimistest, paremäärmuslase Jean-Marie Le Peni pääsemisest selle II vooru, prantslaste vastuseisust EL-i laienemisele, Prantsuse-Saksa suhetest. Andres Talviku elulooandmeid

Wetting behavior of magnesite and dolomite surfaces

Science.gov (United States)

Gence, Nermin

2006-03-01

Magnesite and dolomite are salt-type minerals that show similar chemical composition and flotation behavior due to same crystal structure, and sparingly soluble nature. The surface properties of minerals play a major role in determining their separation from each other in processes such as flotation. During flotation process, selectivity problem arises between magnesite and associated gangue minerals such as dolomite. There is a close relationship between floatability of minerals and their contact angles. Therefore, surface hydrophobicity of magnesite and dolomite minerals was investigated by contact angle measurements in the absence and presence of flotation reagents. Magnesite and dolomite show hydrophilic properties and they have got a small contact angle (magnesite ˜10.4° and dolomite ˜6.6°) in distilled water in the absence of any surfactant. The contact angle values at the magnesite and dolomite surfaces remained at 9.7°-10.9° in the presence of petroleum sulphonates (R825 and R840) while sodium oleate affected hydrophobicity of magnesite, and the contact angle value increased up to 79°. The contact angle value of 39° at dolomite surface was obtained in the solution of sodium oleate, respectively.

Dolomitization and over-dolomitization in the Vajont limestone (Dolomiti Bellunesi, Italy) controlled by Mesozoic normal faults: a microstructural and diagenesis study

Science.gov (United States)

Cortinovis, Silvia; Swennen, Rudy; Bistacchi, Andrea

2015-04-01

The Vajont Gorge (Dolomiti Bellunesi, Italy) provides spectacular outcrops of Jurassic limestones (Vajont Limestone Formation) in which Mesozoic faults and fracture corridors are continuously exposed. Some of these faults acted as conduits for Mg-enriched hydrothermal fluids resulting in structurally-controlled dolomitization of the limestone. The dolomitization resulted in several dolomite bodies (100-200 m thick and several hundreds of meters along fault strike) that are particularly interesting as reservoir analogues for hydrocarbon, CO2, or water-bearing systems. The dolomitization process occurred after deposition and compaction of the oolitic limestone (dolomitization post-dates a dissolution event that affected the internal parts of the oolites), but before the Alpine contractional deformation. In fact, the meso-structural data collected in the Vajont Gorge allowed the reconstruction of a 3D model showing that the circulation of the dolomitizing fluids into the limestone host rock, but also the late stage of porosity reduction (strong pore filling due to over-dolomitization) were controlled by normal faults and fracture corridors interpreted as Pre-Alpine (Jurassic or Cretaceous). Later on, the influence of Alpine (Tertiary) deformation have been very limited in the studied volume. For instance dolomite veins are sometimes overprinted by bed-inclined stylolites consistent with Alpine shortening axes, but no large Alpine fault is present in the studied outcrops. Cathodoluminescence microscopy allowed recognizing different growth stages saddle dolomite crystals, which point to varying precipitation conditions during three main stages of dolomitization. Dolomite and calcite crystal twinning suggests deformation under increasing temperature conditions, consistent with intracrystalline plasticity deformation mechanisms. The presence of cataclasites composed of hydrothermal dolostone clasts, in turn cemented by dolomite, or of dolomite veins and compaction

Strontium isotopic stratigraphy utilizing authigenic dolomites in hemipelagic sediments

Energy Technology Data Exchange (ETDEWEB)

Baker, P.A. (Duke Univ., Durham, NC (USA)); Kastner, M. (Scripps Institute of Oceanography, La Jolla, CA (USA)); Elderfield, H. (Univ. of Cambridge (England))

1990-05-01

Authigenic dolomites commonly occur in organic-rich, continental margin marine sediments. These dolomites play a key role in the age dating of stratigraphic sections. The dolomites often are the only lithology amenable to paleomagnetic stratigraphy; they preserve siliceous microfossils against diagenetic; recrystallization, and provide useful strontium isotopic stratigraphic ages. Several potential sources of error frequently are unique to the use of authigenic dolomites in the strontium isotope methods. (1) The dolomites occur as cements of the host lithology, hence, they are not a pure phase. Potentially important contaminants during analysis include gypsum clay minerals, feldspars, and iron and manganese oxides. Strontium may occur as a structural substituent ion in these minerals or as a surface-adsorbed ion. Various leaching techniques have been tested to isolate dolomitic strontium. Purer dolomites and strontium-enriched dolomites often can be selected to ease these problems. (2) The dolomites form after the deposition of the host sediment, therefore, they record the diagenetic age not the depositional age. The stable isotopic composition of the dolomites can aid in selection of early formed samples. (3) The dolomites record pore-water strontium isotope compositions, not seawater isotopic compositions. This problem is also minimized by choosing dolomites formed near the sediment-water interface. (4) The dolomites formed near the sediment-water interface originated as rotodolomites and undergo subsequent burial diagenesis, creating a potential for later strontium isotope exchange. This problem is minimized by selecting fresh samples from the interior of nearly impermeable beds and nodules. Results from the Miocene Monterey Formation of California and from the Eocene through Pliocene Pisco basin of Peru show that authigenic dolomites can provide useful strontium isotopic age estimates.

Multiple episodes of dolomitization and dolomite recrystallization during shallow burial in Upper Jurassic shelf carbonates: eastern Swabian Alb, southern Germany

Science.gov (United States)

Reinhold, C.

1998-10-01

The Upper Jurassic of the eastern Swabian Alb is composed of oolitic platform sands with associated microbe-siliceous sponge mounds at the platform margins. They are surrounded by argillaceous or calcareous mudstones and marl-limestone alternations, deposited in adjacent marl basins. Partial to complete dolomitization is predominantly confined to the mound facies. Six types of dolomite, as well as one type of ankerite, document a complex diagenetic history during shallow burial with multiple episodes of dolomite formation and recrystallization. The earliest massive matrix dolomitization is Ca-rich, has slightly depleted oxygen isotope values relative to Late Jurassic seawater, and carbon isotopic values in equilibrium with Late Jurassic seawater. This initial massive matrix dolomitization occurred during latest Jurassic to earliest Cretaceous and is related to pressure dissolution during very shallow burial at temperatures of at least 50°C. Hydrologic conditions and mass-balance calculations indicate that burial compaction provided sufficient fluids for dolomitization. Mg is derived from negligibly modified seawater, that was expelled from the adjacent off-reef strata into the mound facies. Position of the mounds along the platform margins controlled the distribution of the shallow-burial dolomite. Covariant trends between textural modification, increasing stoichiometry, partial changes in trace element content (Mn, Fe, Sr) and depletion in stable isotopes as well as distinctive CL pattern illustrate two recrystallization phases of the precursor matrix dolomite during further burial at elevated temperatures. Strong Sr enrichment of the second phase of recrystallized dolomite is ascribed to Sr-rich meteoric waters descending from overlying aragonite-bearing reef limestones or evaporite-bearing peritidal carbonates. Late-stage coarsely crystalline dolomite cements occur as vug and fracture fillings and formed during burial. Ankerite, associated with sulphide and

Cyclic, Early Diagenetic Dolomite Formation in Alkaline Lake Van

Science.gov (United States)

McCormack, J.; Bontognali, T. R. R.; Immenhauser, A.; Kwiecien, O.

2017-12-01

Modern dolomite-forming environments are commonly constrained to evaporitic marine or marginal marine settings such as lagoons and sabkhas. Beside microbial mediation, high temperatures and Mg2+ concentrations in solution are factors considered important in aiding dolomite formation. Accordingly, previous studies associate the presence of dolomite within deep sediments of alkaline Lake Van (Turkey) with periods of enhanced evaporation, low lake levels and high Mg/Ca ratio. We systematically studied dolomite within the sedimentary record of Lake Van by means of XRD, SEM and stable isotope (δ18O and δ13C) mass spectrometry. First, we considered the origin of the dolomite; next, we focused on the wider implication of its presence. SEM imaging documents large dolomite crystals interwoven with clay minerals and individual crystals with different crystallographic orientations grown together, indicating space-limited growth within the sediment. According to recent climatic reconstructions for the same sequence (ICDP PALEOVAN project), the water depth of the coring site - today at 350 m - unlikely fell below 200 m. Consequently, dolomite formed below a thick water column at constantly low temperatures (supported by heavy δ18O signature). Within this environment, variations in Mg/Ca ratio, pH and alkalinity, which are constantly high, have no effect on the episodic nature of dolomite precipitation. These observations call for a re-evaluation of the palaeoenvironments often invoked to interpret intervals rich in dolomite within ancient sedimentary sequences (e.g., periods of enhanced aridity and evaporation). Further, and in contrast to previous interpretations, our dolomite concentration data backed up by ICDP PALEOVAN reconstructions suggest that intervals rich in dolomite coincide with periods of high lake level and increased humidity. High dolomite concentrations (20 - 85 % relative carbonate content) occur cyclically within the last glacial period and coincide with

First description of Phanerozoic radiaxial fibrous dolomite

Science.gov (United States)

Richter, D. K.; Heinrich, F.; Geske, A.; Neuser, R. D.; Gies, H.; Immenhauser, A.

2014-05-01

The petrographic analysis and crystallographic analysis of concretionary carbonate cements ("coal balls") from Carboniferous paralic swamp deposits reveal the presence of (length fast) radiaxial fibrous dolomite (RFD), a fabric not previously reported from the Phanerozoic. This finding is of significance as earlier reports of Phanerozoic radiaxial fibrous carbonates are exclusively of calcite mineralogy. Dolomite concretions described here formed beneath marine transgressive intervals within palustrine coal seams. This is of significance as seawater was arguably the main source of Mg2 + ions for dolomite formation. Here, data from optical microscopy, cathodoluminescence, electron backscattered diffraction, X-ray diffraction and geochemical analyses are presented to characterize three paragenetic dolomite phases and one calcite phase in these concretions. The main focus is on the earliest diagenetic, non-stoichiometric (degree of order: 0.41-0.46) phase I, characterized by botryoidal dolomite constructed of fibres up to 110 μm wide with a systematic undulatory extinction and converging crystal axes. Petrographic and crystallographic evidence clearly qualifies phase I dolomite as radiaxial fibrous. Conversely, fascicular optical fabrics were not found. Carbon-isotope ratios (δ13C) are depleted (between - 11.8 and - 22.1‰) as expected for carbonate precipitation from marine pore-fluids in organic-matter-rich, paralic sediment. Oxygen isotope (δ18O) ratios range between - 1.3 and - 6.0‰. The earliest diagenetic nature of these cements is documented by the presence of ubiquitous, non-compacted fossil plant remains encased in phase I dolomite as well as by the complex zoned luminescence patterns in the crystals and is supported by crystallographic and thermodynamic considerations. It is argued that organic matter, and specifically carboxyl groups, reduced thermodynamic barriers for dolomite formation and facilitated Mg/CaCO3 precipitation. The data shown here

André Petermann (1922-2011)

CERN Multimedia

2012-01-01

The CERN theory community mourns the loss of André Petermann, one of the first members of the Theory Division, who passed away last August in his 89th year. He pioneered, together with his advisor Stueckelberg, the renormalization group, one of the fundamental ideas in quantum field theory that underlies the modern theory of phase transitions as well as asymptotic freedom and the quest for unification of all the particle interactions.   André was among the very first staff members of CERN, which at the beginning was a small group of theorists at the Niels Bohr Institute in Copenhagen, headed by Bohr himself.  When the group moved to Geneva, they first occupied a set of barracks in Cointrin, next to the airport, before moving to the University of Geneva, and then finally settling on the Meyrin site. André was our last direct contact with our nomadic origins. The importance of André’s early work on the renormalization group was recogn...

Disputas marítimas en el Caribe colombiano: la pesca de tortugas en el archipiélago de San Andrés y Providencia, 1910-1930

Directory of Open Access Journals (Sweden)

Sharika Crawford

2017-10-01

Full Text Available There has been a long history of turtle hunting in the Greater Caribbean, especially in Colombian waters around the archipelago of San Andrés and Providence. This article is focused on Colombia’s efforts to affirm its national borders and to strengthen its control over its territorial waters, and on how the new regulations that these measures entail affect turtle hunters in the Caribbean Sea. Using travel stories, newspapers from Jamaica, Colombia and the United States, as well as diplomatic correspondence, interviews and secondary sources, this study analyzes the national and regional implications of these problems. This makes it possible to conclude that the islanders, in the company of Colombian officials, attempted to defend their insular territory and its maritime borders against both real and imaginary threats. Their efforts were aimed at restricting the extraction of marine resources within the country’s territorial waters, as part of the government’s interest in reinforcing the integrity of the Colombian nation-state in the Caribbean.

Space schemes of ecological zonation and morphology of the atolls lagoons and reef complex of an oceanic archipelago of the Caribbean: San Andres and Providence (Colombia)

International Nuclear Information System (INIS)

Diaz M, Juan Manuel

2005-01-01

The oceanic atolls and reef-complexes of the Archipelago of San Andres and Providencia exhibit semi-enclosed to rather open lagoon basins, where various characteristic bottom habitats occur. Certain areas of the lagoon floor are covered by sediments, being in some settings vegetated by algae or sea grass, and other areas by coralline framework of different types according to the composition and dominance of coral species and to their morphology and level of reef development. This study seeks to determine the spatial distribution patterns of lagoon bottom habitats based on the analysis of gradients of most relevant physical factors. Patterns in the occurrence and abundance of most habitats became evident in relation with wave-energy level, water depth, and the occurrence of islands. Some morphological reef types are oriented in a preferential direction and show spatial arrangements of development that are presumably related to prevailing current speed and direction and wave exposure

Review of Dolomite as Precursor of Geopolymer Materials

Directory of Open Access Journals (Sweden)

Azimi E.A.

2016-01-01

Full Text Available Geopolymer is an environmentally friendly cementitious binder that does not require the existence of ordinary Portland cement (OPC. Geopolymer has many excellent advantages, including high early strength, low shrinkage, good thermal resistance and good chemical resistance. Previous commonly used materials include fly ash, clay and slag. The used of dolomite as precursor material in geopolymer field is still new and at the early stage of study. Only a few researchers have done studies on dolomite in geopolymer. Dolomite (CaMg(CO32 is abundant and generally inexpensive natural minerals. The possible use of these bulk calcium carbonate materials in improving the mechanical properties of geopolymers will therefore be of great interest. This paper summarizes some research outcomes on dolomite in geopolymer along with the potential of dolomite as geopolymer composites.

Andres Rõhu: kujundaja metsast / Andres Rõhu ; intervjueerinud Kaarel Kressa

Index Scriptorium Estoniae

Rõhu, Andres, 1965-

2010-01-01

Maalikunstnik Andres Rõhu sellest, kuidas temast sai raamatute kujundaja, parematest enda kujundatud raamatutest, südamelähedasematest eesti raamatukujundajatest, maal elamise eelistest. Loetletud A, Rõhu kujundatud teoseid

Reconfiguración de alianzas políticas en contextos críticos: los caciques de San Andrés de Machaca (Pacajes, Audiencia de Charcas, siglos XV-XVII

Directory of Open Access Journals (Sweden)

Ariel Jorge Morrone

2015-02-01

Full Text Available Este trabajo explora las estrategias de reconfiguración política articuladas por los líderes étnicos de San Andrés de Machaca (actual provincia Ingavi, departamento de La Paz, Bolivia, en tres contextos críticos: la invasión incaica (a mediados del siglo xv, la sistematización del orden colonial hispánico (fines del siglo xvi y el desarrollo posterior de este sistema (primera mitad del siglo xvii. Cada situación definió nuevas reglas del juego político, ante las cuales las autoridades étnicas apelaron a una variedad de prácticas: la reorganización territorial, la asignación de recursos (de consumo y de prestigio, los rituales de negociación, la memoria genealógica y el tramado de redes personales.

André Rousset 1930-2001

CERN Multimedia

2001-01-01

André Rousset in 1962 , seen working on BP3, one of the earlier bubble chambers, with André Lagarrigue (standing). André Rousset died on 1 July at the age of 70. For those who lived through the Gargamelle epic, his name is linked with the success of the great bubble chamber that made possible the 1973 discovery of neutral currents. A graduate of Paris's famous Ecole Polytechnique which produced so many great names in particle physics, André Rousset, a native of southern France, joined Louis Leprince-Ringuet's famous laboratory at the Polytechnique in 1954. Among other topics, Rousset played a part in the cosmic ray experiments at the Pic du Midi in the Pyrénées and designed heavy liquid bubble chambers. A Professor at the Ecole des Mines from 1960 onwards, he became deputy director of Louis Leprince-Ringuet's laboratory in 1964. In 1969 he came to CERN where, logically, he headed the TCL group in charge of heavy liquid bubble chambers. In thi...

Nanometer-scale features in dolomite from Pennsylvanian rocks, Paradox Basin, Utah

Science.gov (United States)

Gournay, Jonas P.; Kirkland, Brenda L.; Folk, Robert L.; Lynch, F. Leo

1999-07-01

Scanning electron microscopy reveals an association between early dolomite in the Pennsylvanian Desert Creek (Paradox Fm.) and small (approximately 0.1 μm) nanometer-scale textures, termed `nannobacteria'. Three diagenetically distinct dolomites are present: early dolomite, limpid dolomite, and baroque dolomite. In this study, only the early dolomite contained nanometer-scale features. These textures occur as discrete balls and rods, clumps of balls, and chains of balls. Precipitation experiments demonstrate that these textures may be the result of precipitation in an organic-rich micro-environment. The presence of these nanometer-scale textures in Pennsylvanian rocks suggests that these early dolomites precipitated in organic-rich, bacterial environments.

The magnesium isotope (δ26Mg) signature of dolomites

Science.gov (United States)

Geske, A.; Goldstein, R. H.; Mavromatis, V.; Richter, D. K.; Buhl, D.; Kluge, T.; John, C. M.; Immenhauser, A.

2015-01-01

Dolomite precipitation models and kinetics are debated and complicated due to the complex and temporally fluctuating fluid chemistry and different diagenetic environments. Using well-established isotope systems (δ18O, δ13C, 87Sr/86Sr), fluid inclusions and elemental data, as well as a detailed sedimentological and petrographic data set, we established the precipitation environment and subsequent diagenetic pathways of a series of Proterozoic to Pleistocene syn-depositional marine evaporative (sabkha) dolomites, syn-depositional non-marine evaporative (lacustrine and palustrine) dolomites, altered marine ("mixing zone") dolomites and late diagenetic hydrothermal dolomites. These data form the prerequisite for a systematic investigation of dolomite magnesium isotope ratios (δ26Mgdol). Dolomite δ26Mg ratios documented here range, from -2.49‰ to -0.45‰ (δ26Mgmean = -1.75 ± 1.08‰, n = 42). The isotopically most depleted end member is represented by earliest diagenetic marine evaporative sabkha dolomites (-2.11 ± 0.54‰ 2σ, n = 14). In comparing ancient compositions to modern ones, some of the variation is probably due to alteration. Altered marine (-1.41 ± 0.64‰ 2σ, n = 4), and earliest diagenetic lacustrine and palustrine dolomites (-1.25 ± 0.86‰ 2σ, n = 14) are less negative than sabkha dolomites but not distinct in composition. Various hydrothermal dolomites are characterized by a comparatively wide range of δ26Mg ratios, with values of -1.44 ± 1.33‰ (2σ, n = 10). By using fluid inclusion data and clumped isotope thermometry (Δ47) to represent temperature of precipitation for hydrothermal dolomites, there is no correlation between fluid temperature (∼100 to 180 °C) and dolomite Mg isotope signature (R2 = 0.14); nor is there a correlation between δ26Mgdol and δ18Odol. Magnesium-isotope values of different dolomite types are affected by a complex array of different Mg sources and sinks, dissolution/precipitation and non

The issue of personal safety on dolomite: A probability-based evaluation with respect to transient passage in a city centre

OpenAIRE

Kirsten, H A D; Heath, G J; Venter, I S; Oosthuizen, A C

2014-01-01

ABSTRACT For the past fifty years empirical knowledge guided the development of rules regarding population density on dolomite land. The insatiable demand for land, the improvement in transportation infrastructure and the associated need for improving the functionality of towns require that these rules on the risk of personal injury and damage to assets are revisited from a more scientific perspective. Probability theory provides a basis for decision-making in this regard. SANS 1936:2012 defi...

Ferroan Dolomitization by Seawater Interaction with Mafic Igneous Dikes and Carbonate Host Rock at the Latemar Platform, Dolomites, Italy: Numerical Modeling of Spatial, Temporal, and Temperature Data

Directory of Open Access Journals (Sweden)

K. Blomme

2017-01-01

Full Text Available Numerous publications address the petrogenesis of the partially dolomitized Latemar carbonate platform, Italy. A common factor is interpretation of geochemical data in terms of heating via regional igneous activity that provided kinetically favorable conditions for replacement dolomitization. New field, petrographic, XRD, and geochemical data demonstrate a spatial, temporal, and geochemical link between replacement dolomite and local mafic igneous dikes that pervasively intrude the platform. Dikes are dominated by strongly altered plagioclase and clinopyroxene. Significantly, where ferroan dolomite is present, it borders dikes. We hypothesize that seawater interacted with mafic minerals, causing Fe enrichment in the fluid that subsequently participated in dolomitization. This hypothesis was tested numerically through thermodynamic (MELTS, Arxim-GEM and reactive flow (Arxim-LMA simulations. Results confirm that seawater becomes Fe-enriched during interaction with clinopyroxene (diopside-hedenbergite and plagioclase (anorthite-albite-orthoclase solid solutions. Reaction of modified seawater with limestone causes ferroan and nonferroan replacement dolomitization. Dolomite quantities are strongly influenced by temperature. At 40 to 80°C, ferroan dolomite proportions decrease with increasing temperature, indicating that Latemar dolomitization likely occurred at lower temperatures. This relationship between igneous dikes and dolomitization may have general significance due to the widespread association of carbonates with rifting-related igneous environments.

PT symmetric Aubry–Andre model

International Nuclear Information System (INIS)

Yuce, C.

2014-01-01

PT symmetric Aubry–Andre model describes an array of N coupled optical waveguides with position-dependent gain and loss. We show that the reality of the spectrum depends sensitively on the degree of quasi-periodicity for small number of lattice sites. We obtain the Hofstadter butterfly spectrum and discuss the existence of the phase transition from extended to localized states. We show that rapidly changing periodical gain/loss materials almost conserve the total intensity. - Highlights: • We show that PT symmetric Aubry–Andre model may have real spectrum. • We show that the reality of the spectrum depends sensitively on the degree of disorder. • We obtain the Hofstadter butterfly spectrum for PT symmetric Aubry–Andre model. • We discuss that phase transition from extended to localized states exists

PT symmetric Aubry–Andre model

Energy Technology Data Exchange (ETDEWEB)

Yuce, C., E-mail: cyuce@anadolu.edu.tr

2014-06-13

PT symmetric Aubry–Andre model describes an array of N coupled optical waveguides with position-dependent gain and loss. We show that the reality of the spectrum depends sensitively on the degree of quasi-periodicity for small number of lattice sites. We obtain the Hofstadter butterfly spectrum and discuss the existence of the phase transition from extended to localized states. We show that rapidly changing periodical gain/loss materials almost conserve the total intensity. - Highlights: • We show that PT symmetric Aubry–Andre model may have real spectrum. • We show that the reality of the spectrum depends sensitively on the degree of disorder. • We obtain the Hofstadter butterfly spectrum for PT symmetric Aubry–Andre model. • We discuss that phase transition from extended to localized states exists.

Identification of Oxide Compound in Dolomite Mineral from Aceh Tamiang Region

Directory of Open Access Journals (Sweden)

Nirmala Sari

2013-08-01

Full Text Available Indonesia has abundant mineral especially carbonate-based mineral, ike dolomite. Particularly in Aceh province's, the largest dolomite deposits is available in Aceh Tamiang district around 1.9 billion tons. Unfortunately, current use of dolomite in the industry and other applications is still limited. In this work we report the advanced preparation of dolomite using calcinations method. Whereas, with this method, the dolomite mineral can be processed into calcium and magnesium oxide which has a very wide field of application and higher values. To obtain optimal results, we also identify the effect of temperature on the formation of oxide compounds. Preliminary study using XRF founded that dolomite in village Selamat is known as the highest concentration of CaO (61.20% followed by MgO (25.28%. It is also showed that the main phase obtained by XRD is dolomite (CaMg(CO32. Furthermore, after the calcinations process at 700 °C, it was founded that the formation of dolomite were CaCO3 and MgO, whereas at temperatures of 900 °C mostly the CaCO3 has decomposed into CaO. SEM observations showed that dolomite has the composition of particles distributed homogeneously along the particle agglomerate when it calcinations.

Aerobic microbial dolomite at the nanometer scale : Implications for the geologic record

NARCIS (Netherlands)

Sánchez-Román, Mónica; Vasconcelos, Crisógono; Schmid, Thomas; Dittrich, Maria; McKenzie, Judith A.; Zenobi, Renato; Rivadeneyra, Maria A.

2008-01-01

Microbial experiments are the only proven approach to produce experimental dolomite under Earth's surface conditions. Although microbial metabolisms are known to induce dolomite precipitation by favoring dolomite growth kinetics, the involvement of microbes in the dolomite nucleation process is

Controls on Cyclic Formation of Quaternary Early Diagenetic Dolomite

Science.gov (United States)

McCormack, J.; Bontognali, T. R. R.; Immenhauser, A.; Kwiecien, O.

2018-04-01

The origin of sedimentary dolomite and the factors that control its formation within the geological record remain speculative. In most models, dolomite formation is linked to evaporative conditions, high water temperature, increasing Mg/Ca ratio, increasing alkalinity, and high amounts of biomass. Here we challenge these archetypal views, by documenting a case example of Quaternary dolomite which formed in Lake Van at constantly low temperature (stress, resulting from reventilation of the water-sediment interface. Independently from the validity of this hypothesis, our results call for a reevaluation of the paleoenvironmental conditions often invoked for early diagenetic dolomite-rich intervals within sedimentary sequences and for caution when interpreting time series of subrecent lacustrine carbonates.

High salinity facilitates dolomite precipitation mediated by Haloferax volcanii DS52

Science.gov (United States)

Qiu, Xuan; Wang, Hongmei; Yao, Yanchen; Duan, Yong

2017-08-01

Although most modern dolomites occur in hypersaline environments, the effects of elevated salinity on the microbial mediation of dolomite precipitation have not been fully evaluated. Here we report results of dolomite precipitation in association with a batch culture of Haloferax volcanii DS52, a halophilic archaeon, under various salinities (from 120‰ to 360‰) and the impact of salinity on microbe-mediated dolomite formation. The mineral phases, morphology and atomic arrangement of the precipitates were analyzed by XRD, SEM and TEM, respectively. The amount of amino acids on the archaeal cell surface was quantified by HPLC/MS. The XRD analysis indicated that disordered dolomite formed successfully with the facilitation of cells harvested from cultures with relatively high salinities (200‰ and 280‰) but was not observed in association with cells harvested from cultures with lower salinity (120‰) or the lysates of cells harvested from extremely high salinity (360‰). The TEM analysis demonstrated that the crystals from cultures with a salinity of 200‰ closely matched that of dolomite. Importantly, we found that more carboxyl groups were presented on the cell surface under high salinity conditions to resist the high osmotic pressure, which may result in the subsequent promotion of dolomite formation. Our finding suggests a link between variations in the hydro-chemical conditions and the formation of dolomite via microbial metabolic activity and enhances our understanding about the mechanism of microbially mediated dolomite formation under high salinity conditions.

Implementación de las tics como estrategia didáctica para generar un aprendizaje significativo de los procesos celulares en los estudiantes de grado sexto de la institución educativa San Andrés del municipio de Girardota

OpenAIRE

Monsalve Ochoa, Martha Lía

2012-01-01

Esta práctica docente se hizo con el objetivo de aplicar herramientas TIC a una serie de estudiantes de la institución educativa san Andrés de la vereda del mismo nombre del municipio de Girardota. Son jóvenes entre 11 y 15 años de escasos recursos en su mayoría, con poco apoyo de sus padres para la motivación hacia el estudio, en la institución no se cuenta con laboratorio ni material alguno para la práctica de las ciencias. No son jóvenes que le vean mucha importancia a esta área porque nin...

Andres Puustusmaa esikfilm Moskva filmifestivalil / Andres Laasik

Index Scriptorium Estoniae

Laasik, Andres, 1960-2016

2007-01-01

Eestist pärit režissööril Andres Puustusmaal esilinastub 29. juunil Moskva filmifestivali raames tema esimene täispikk mängufilm, Venemaa ja Ukraina ühistöö "Armastuse punane pärl" ("Krasnõi zhemtshug ljubvi"), peaosas Oksana Fandera, operaatoriks soomlane Timo Salminen. Valmis on ka teine mängufilm "1814", mis koos eespool nimetatuga tuleb kinodesse septembris. Ka Moskva festivali kavast

Diagenetic modification of Knox evaporative-dolomite geochemistry by middle Ordovician paleoaquifer/burial fluids

Energy Technology Data Exchange (ETDEWEB)

Montanez, I.P.; Read, J.F.

1986-05-01

Early Ordovician upper Knox cyclic carbonates (100,000-year periods) were deposited on a ramp in a semiarid setting. Inner ramp facies are completely dolomitized, whereas only cycle caps on the outer ramp are dolomite. Laminite caps on leading edges of prograding flats were dolomitized by evaporative, storm-recharged marine waters that precipitated CoCO/sub 3/ and minor amounts of CaSO/sub 4/. Subtidal facies beneath interiors of supratidal flats (up to 200 km wide)were dolomitized by shallow subsurface brines as the flats prograded. Inner ramp areas existed as supretidal flats for as long as 100,000 years, hence only there are sequences completely dolomitized. Tidal-flat dolomites consist of euhedral to subhedral fabric preservation mosaics (crystals 5-50 ..mu..m, and up to 300 ..mu..m in replaced pelletal layers). Dolomitized subtidal sediments are composed of 20-200 ..mu..m dolomite crystals. Most of the early dolomites are fabric retentive initially, becoming more fabric destructive with increasing exposure to dolomitizing fluids. Fe values are up to 2000 ppm, and Mn values are up to 500 ppm. delta/sup 18/O values show strong geographic control, with samples depleted (up to - 7 per thousand) relative to pristine evaporative dolomites derived from concentrated Ordovician seawater. Burial dolomites are enriched in Fe (up to 14,000 ppm) and depleted in delta/sup 18/O, suggesting precipitation from basinal brines at elevated temperatures. Geochemical data suggest that evaporative dolomites have undergone modification by isotopically lighter fluids. Alteration most likely occurred within a Middle Ordovician meteoric aquifer system or less likely by later Paleozoic basinal brines. Regional geologic data for Knox Group carbonates throughout the eastern US are vital in constraining dolomitization models.

Natural factors and antropics and their relationship with the density of colonies of Melipona beecheii in five vegetable formations of the valley San Andres

Directory of Open Access Journals (Sweden)

Katiuska Ravelo Pimentel

2014-12-01

Full Text Available It is evaluated the influence of natural factors and antropics on the density of colonies of Melipona beecheii in forest five vegetable formations of the solid one of the valley San Andrés, through surveys to residents and workers of the area, as well as the observations and samplings carried out in the studied vegetable formations. The following factors were studied: rocosity, vegetable covering, flourished plants, height of the entrance hole and the man's activity; being determined that the density of beehives has been affected fundamentally by factors antropics, having this its biggest incidence in the gallery forests, being this the most affected one. The pruning of trees, the naturalness of the forests and their access affect the population's conservation considerably under natural conditions, what demonstrates that this it is the main factor that locates in extirpation danger to the species in the study area. In turn the density of colonies keeps direct relationship with the other analyzed factors, since the same ones depend on the trees for the location of its nests, of the time in that the plants flourish for its feeding and of the holes found in the rocks, so much for the making of its colonies like it stops its establishment and reproduction.

Geochemistry and origin of regional dolomites

International Nuclear Information System (INIS)

Hanson, G.N.; Meyers, W.J.

1989-12-01

The major goal of the carbonate research program at Stony Brook is to better understand the conditions and processes leading to regional diagenesis of carbonate rocks. Our research focuses on studies of ancient, massive dolostones, but we are also studying limestone diagenesis for its own importance, and as it relates to dolomitization. Our approach has been to carry out a very detailed petrographic and geochemical case study to the Mississippian Burlington-Keokuk Fms. of Iowa, Illinois and Missouri, and to develop this as a testing ground for new geochemical and modelling techniques, and for testing various models for regional dolomitization in epicontinental carbonates. The ideas and techniques developed in our Burlington-Keokuk studies are being expanded and applied to carbonate sequences of other ages (Devonian to Neogene), and other tectono-sedimentary settings. The emphasis of this report will be on new developments and results on the Burlington-Keokuk studies and on our diagenetic studies of other strata. Recent research on Burlington-Keokuk rocks include development and application of boron isotopes and the U--Th--Pb system to dolomite studies, investigations of porosity and permeability in the dolostones. Projects on other strata include dolomitization and limestones diagenesis of Devonian carbonates of Alberta and Western Australia, Miocene reefal carbonates of Spain, Neogene carbonates of Curacao and Bonaire, Waulsortian limestones of Ireland, modelling of trace elements and stable isotopes, and experimental growth of calcites to investigate crystallographic controls of trace element incorporation. 118 refs., 46 figs

Metal Sorption to Dolomite Surfaces

International Nuclear Information System (INIS)

Brady, P.V.; Papenguth, H.W.; Kelly, J.W.

1999-01-01

Potential human intrusion into the Waste Isolation Pilot Plant (WIPP) might release actinides into the Culebra Dolomite where sorption reactions will affect of radiotoxicity from the repository. Using a limited residence time reactor the authors have measured Ca, Mg, Nd adsorption/exchange as a function of ionic strength, P CO2 , and pH at 25 C. By the same approach, but using as input radioactive tracers, adsorption/exchange of Am, Pu, U, and Np on dolomite were measured as a function of ionic strength, P CO2 , and pH at 25 C. Metal adsorption is typically favored at high pH. Calcium and Mg adsorb in near-stoichiometric proportions except at high pH. Adsorption of Ca and Mg is diminished at high ionic strengths (e.g., 0.5M NaCl) pointing to association of Na + with the dolomite surface, and the possibility that Ca and Mg sorb as hydrated, outer-sphere complexes. Sulfate amplifies sorption of Ca and Mg, and possibly Nd as well. Exchange of Nd for surface Ca is favored at high pH, and when Ca levels are low. Exchange for Ca appears to control attachment of actinides to dolomite as well, and high levels of Ca 2+ in solution will decrease Kds. At the same time, to the extent that high P CO2 increase Ca 2+ levels, JK d s will decrease with CO 2 levels as well, but only if sorbing actinide-carbonate complexes are not observed to form (Am-carbonate complexes appear to sorb; Pu-complexes might sorb as well; U-carbonate complexation leads to desorption). This indirect CO 2 effect is observed primarily at, and above, neutral pH. High NaCl levels do not appear to affect to actinide K d s

Hydrothermal dolomite reservoir facies in the Sinian Dengying Fm, central Sichuan Basin

Directory of Open Access Journals (Sweden)

Yuqiang Jiang

2017-07-01

Full Text Available The Upper Sinian Dengying Fm is the focus of natural gas exploration in the central part of the Sichuan Basin (central Sichuan Basin in recent years. Especially, epigenic karstification and its resulted reservoir-seepage spaces have always been the focal points in researches. Based on the petrographic characteristics of drilling cuttings and core samples, and through experimental analysis by using trace elements, isotopes, and cathodoluminescence, the Dengying Fm dolomite was demonstrated to have matrix recrystallized dolomite (MRD, filled saddle dolomite (FSD (the mean homogenization temperature of inclusion: 178.5 °C, high concentrations of Fe & Mn, slightly positive 87Sr/86Sr value and hydrothermal minerals combination (including sphalerite, galena, pyrite, and quartz, etc.. Thus, it was proposed that hydrothermal dolomite reservoir facies (HDRF exist in the Dengying Fm dolomite, in other words, the dolomite reservoir is composed of hydrothermal dissolved pores, intercrystalline pores of hydrothermal origin, hydrothermal caverns and expanded fractures, and was formed due to the reworking of hydrothermal fluid on tight matrix dolomite. Identification marks are presented in terms of petrography and geochemistry so that hydrothermal dolomite reservoir facies can be effectively recognized and identified. It is concluded that the development of hydrothermal dolomite reservoir facies in this area are preliminary controlled by deep and large basement faults and the strength of hydrothermal fluids.

CERN celebrates André Martin’s 80th birthday

CERN Multimedia

2009-01-01

André Martin, pictured at the ceremony held in honour of his 80th birthday. On 27 August 2009 CERN’s Main Auditorium was the venue for a celebration in honour of André Martin’s 80th birthday. Regarded as one of the most important theoretical physicists of his generation, André Martin is one of CERN’s most distinguished figures. The celebration began with a conference, followed by a concert and a reception. After the conference, André Martin made an emotional speech looking back over his fifty-year career and paying tribute to all those who had made important contributions during his time at CERN. "I was extremely happy, and I am very touched by this marvellous celebration you have organised for me. It was a wonderful idea, and I very much enjoyed the concert of Blandine Eynaud and John Devore. My wife, Schu, and I love the music of Gabriel Fauré", he said at the end. André Martin j...

Influence of deformation on dolomite rim growth kinetics

Science.gov (United States)

Helpa, Vanessa; Rybacki, Erik; Grafulha Morales, Luiz Fernando; Dresen, Georg

2015-04-01

Using a gas-deformation apparatus stacks of oriented calcite (CaCO3) and magnesite (MgCO3) single crystals were deformed at T = 750° C and P = 400 MPa to examine the influence of stress and strain on magnesio-calcite and dolomite (CaMg[CO3]2) growth kinetics. Triaxial compression and torsion tests performed at constant stresses between 7 and 38 MPa and test durations between 4 and 171 hours resulted in bulk strains of 0.03-0.2 and maximum shear strains of 0.8-5.6, respectively. The reaction rims consist of fine-grained (2-7 μm) dolomite with palisade-shaped grains growing into magnesite reactants and equiaxed granular dolomite grains next to calcite. In between dolomite and pure calcite, magnesio-calcite grains evolved with an average grain size of 20-40 μm. Grain boundaries tend to be straighter at high bulk strains and equilibrium angles at grain triple junctions are common within the magnesio-calcite layer. Transmission electron microscopy shows almost dislocation free palisades and increasing dislocation density within granular dolomite towards the magnesio-calcite boundary. Within magnesio-calcite grains, dislocations are concentrated at grain boundaries. Variation of time at fixed stress (˜17 MPa) yields a parabolic time dependence of dolomite rim width, indicating diffusion-controlled growth, similar to isostatic rim growth behavior. In contrast, the magnesio-calcite layer growth is enhanced compared to isostatic conditions. Triaxial compression at given time shows no significant change of dolomite rim thickness (11±2 μm) and width of magnesio-calcite layers (33±5 μm) with increasing stress. In torsion experiments, reaction layer thickness and grain size decrease from the center (low stress/strain) to the edge (high strain/stress) of samples. Chemical analysis shows nearly stoichiometric composition of dolomite palisades, but enhanced Ca content within granular grains, indicating local disequilibrium with magnesio-calcite, in particular for twisted

Precipitation, density, and population dynamics of desert bighorn sheep on San Andres National Wildlife Refuge, New Mexico

Science.gov (United States)

Bender, L.C.; Weisenberger, M.E.

2005-01-01

Understanding the determinants of population size and performance for desert bighorn sheep (Ovis canadensis mexicana) is critical to develop effective recovery and management strategies. In arid environments, plant communities and consequently herbivore populations are strongly dependent upon precipitation, which is highly variable seasonally and annually. We conducted a retrospective exploratory analysis of desert bighorn sheep population dynamics on San Andres National Wildlife Refuge (SANWR), New Mexico, 1941-1976, by modeling sheep population size as a function of previous population sizes and precipitation. Population size and trend of desert bighorn were best and well described (R 2=0.89) by a model that included only total annual precipitation as a covariate. Models incorporating density-dependence, delayed density-dependence, and combinations of density and precipitation were less informative than the model containing precipitation alone (??AlCc=8.5-22.5). Lamb:female ratios were positively related to precipitation (current year: F1,34=7.09, P=0.012; previous year: F1,33=3.37, P=0.075) but were unrelated to population size (current year. F1,34=0.04, P=0.843; previous year: F1,33 =0.14, P=0.715). Instantaneous population rate of increase (r) was related to population size (F1,33=5.55; P=0.025). Precipitation limited populations of desert bighorn sheep on SANWR primarily in a density-independent manner by affecting production or survival of lambs, likely through influences on forage quantity and quality. Habitat evaluations and recovery plans for desert bighorn sheep need to consider fundamental influences on desert bighorn populations such as precipitation and food, rather than focus solely on proximate issues such as security cover, predation, and disease. Moreover, the concept of carrying capacity for desert bighorn sheep may need re-evaluation in respect to highly variable (CV =35.6%) localized precipitation patterns. On SANWR carrying capacity for desert

Andres Ehin Jaapanist Iirini

Index Scriptorium Estoniae

2006-01-01

Andres Ehin valiti Ülemaailmse Haiku Assotsiatsiooni auliikmeks ja kirjaniku inglisekeelset luulekogu "Moose Beetle Swallow" esitleti 2005. aasta Euroopa kultuuripealinnas Corkis Iirimaal. Järgneb: Looming 2006, nr. 2, lk. 311

Nanotoxicity of dolomite mineral of commercial importance in India.

Science.gov (United States)

Patil, Govil; Khan, Mohd Imran; Akhtar, Mohd Javed; Ashquin, Mohd; Sultana, Sarwat; Ahmad, Iqbal

2011-02-01

The risk of occupational exposure to dolomite, an important mineral exists both in organized as well as unorganized sectors. Toxicological profiles of bulk dolomite are meagerly known in general and its nanotoxicity in particular. Effects of micro- and nano particles on cell viability, LDH leakage and markers of oxidative stress were observed. The study indicated that cytotoxicity of dolomite nanoparticles is significantly higher than the microparticles. The study thus suggests for the prescription of exposure limit for nanodolomite in the best interest of health of workers at risk of exposure under mining, milling and industrial environment.

Can Mn–S redox cycling drive sedimentary dolomite formation? A hypothesis

Energy Technology Data Exchange (ETDEWEB)

Petrash, Daniel A.; Lalonde, Stefan V.; González-Arismendi, Gabriela; Gordon, Robert A.; Méndez, José A.; Gingras, Murray K.; Konhauser, Kurt O. (CLS); (UCV-Venezuela); (CNRS-UMR); (Alberta)

2016-06-10

The formation of dolomite in modern peritidal environments is linked to the degradation of buried microbial mats, with complexation of Ca and Mg by extracellular polymeric substances (EPSs) and alkalinity generation through organic carbon respiration facilitating the nucleation of dolomite precursors. In the past two decades, microbial sulfate reduction, methanogenesis, and methanotrophy have all been considered as potential drivers of the nucleation process, but it remains unclear why dolomite formation could not also occur in suboxic sediments where abundant alkalinity is produced by processes linked to Mn(IV) and/or Fe(III) reduction coupled with the diffusion and reoxidation of reduced sulfur species. Here we report the interstitial occurrence of spheroidal aggregates of nanometer-scale Ca-rich dolomite rhombohedra within suboxic sediments associated with remnant microbial mats that developed in the peritidal zone of the Archipelago Los Roques, Venezuela. Multiple analytical tools, including EPMA, ICP-MS, synchrotron-based XRF and XRD, and spatially resolved XANES microanalyses, show that the dolomite-cemented interval exhibits depleted bulk iron concentrations, but is interstitially enriched in Mn and elemental sulfur (S⁰). Manganese occurs in several oxidation states, indicating that the dolomite-cemented interval was the locus of complex biological redox transformations characterized by coupled Mn and S cycling. The tight correspondence between sedimentary Mn and MgCO₃ concentrations further hints at a direct role for Mn during dolomitization. While additional studies are required to confirm its relevance in natural settings, we propose a model by which coupled Mn–S redox cycling may promote alkalinity generation and thus dolomite formation in manner similar to, or even more efficiently, than bacterial sulfate reduction alone.

Andres Võsand: hakkan ilmselt elukutseliseks kunstnikuks / Andres Võsand ; intervjueerinud Veiko Visnapuu

Index Scriptorium Estoniae

Võsand, Andres, 1966-

2010-01-01

Intervjuu Saksaamaal elava tennisisti Andres Võsandiga, kelle maalinäitus "Värvireisid" on avatud Kadriorus Kastellaanimaja Galeriis 30.10-28.11.2010. Tegelemisest maalikunstiga, näitusest, reisidest inspireeritud loomingust, tööst tennisetreenerina, tennisekarjäärist. Andmeid A. Võsandi elukäigu kohta

First discovery of dolomite and magnesite in living coralline algae and its geobiological implications

Directory of Open Access Journals (Sweden)

M. C. Nash

2011-11-01

Full Text Available Dolomite is a magnesium-rich carbonate mineral abundant in fossil carbonate reef platforms but surprisingly rare in modern sedimentary environments, a conundrum known as the "Dolomite Problem". Marine sedimentary dolomite has been interpreted to form by an unconfirmed, post-depositional diagenetic process, despite minimal experimental success at replicating this. Here we show that dolomite, accompanied by magnesite, forms within living crustose coralline alga, Hydrolithon onkodes, a prolific global tropical reef species. Chemical micro-analysis of the coralline skeleton reveals that not only are the cell walls calcitised, but that cell spaces are typically filled with magnesite, rimmed by dolomite, or both. Mineralogy was confirmed by X-ray Diffraction. Thus there are at least three mineral phases present (magnesium calcite, dolomite and magnesite rather than one or two (magnesium calcite and brucite as previously thought. Our results are consistent with dolomite occurrences in coralline algae rich environments in fossil reefs of the last 60 million years. We reveal that the standard method of removing organic material prior to Xray Diffraction analysis can result in a decrease in the most obvious dolomite and magnesite diffraction patterns and this may explain why the abundant protodolomite and magnesite discovered in this study has not previously been recognized. This discovery of dolomite in living coralline algae extends the range of palaeo-environments for which biologically initiated dolomite can be considered a possible source of primary dolomite.

Microbial dolomite crusts from the carbonate platform off western India

Digital Repository Service at National Institute of Oceanography (India)

Rao, V.P.; Kessarkar, P.M.; Krumbein, W.E.; Krajewski, K.P.; Schneider, R.J.

Association of Sedimentologists, Sedimentology, 50, 819-830 Microbial dolomite crusts off western India 821 dolomite crusts [2 x 2·5 em to 3 x 0'5 em) and pebbles occur within these sediments. METHODS Thin sections of the crusts were studied petro graphically....E. (19S7) Holocene dolomitization Df supr

Production of biodiesel from palm oil using modified Malaysian natural dolomites

International Nuclear Information System (INIS)

Shajaratun Nur, Z.A.; Taufiq-Yap, Y.H.; Rabiah Nizah, M.F.; Teo, Siow Hwa; Syazwani, O.N.; Islam, Aminul

2014-01-01

Highlights: • Transesterification was carried out using modified Malaysian natural dolomite catalyst. • Characterizations of the catalyst were performed by using XRD, TPD-CO 2 , BET and SEM. • Maximum biodiesel conversion of 100% was achieved from SnO 2 /dolomite catalyst. • The yield was affected by the surface are as well as the basicity of catalyst. • The transesterification reaction gave significant conversion with relatively lower amount of catalyst. - Abstract: Calcined dolomite (AD), produced by calcination of Malaysian dolomite (UD) promotes a potential natural catalyst for biodiesel production from palm oil with the conversion of 99.98%. The catalysts were characterized by using X-ray Diffractometer (XRD), Brunauer–Emmet–Teller (BET) surface area, Scanning Electron Microscopy (SEM) and Temperature Programmed Desorption (TPD) of CO 2 . All catalysts were then employed for transesterification reaction under different conditions (time, methanol to oil molar ratio and amount of catalyst). SnO 2 doped on activated dolomite (SD) shows an optimum conversion (99.98%) at conditions, i.e. 15:1 methanol to oil molar ratio in 4 h compared to ZnO doped on activated dolomite (ZD) and AD. The catalytic activities of these catalysts were found to be depending on the basicity as well as the surface area of the catalyst used

Les mots du jazz. Retour(s) sur Le Jazz, d'André Schaeffner et André Coeuroy

OpenAIRE

Roueff , Olivier

2001-01-01

International audience; Le Jazz by André Schaeffner and André Cœuroy (1926), the first learned analysis of jazz, signaled an important phase in the reinvention of this music in France, since, through the debates it sparked at the time, it helped change jazz’s identity from an « American » to a « Black American » music with African « roots ». Cœuroy and Schaeffner referred to sorts of music that jazz criticism would have throw out of its pantheon, but their analyses would form the major grids ...

Effects of ancient porosity and permeability on formation of sedimentary dolomites: Devonian Jefferson Formation (Frasnian), south-central Montana

Energy Technology Data Exchange (ETDEWEB)

Smith, T.M.; Dorobek, S.L.

1987-08-01

Petrographic and geochemical evidence indicates that multiple dolomitization and dolomite stabilization events affected the Devonian Jefferson Formation (Frasnian) in south-central Montana. Several types of dolomite occur, defined by cathodoluminescence: nonzoned, dully luminescent subhedral-anhedral mosaics (most common), euhedral nonzoned and zoned dolomites, zoned dolomite cements, and irregularly luminescent dolomites (dully luminescent with irregularly luminescent regions). The irregularly luminescent fabrics probably represent partial replacement of early dolomite phases with later dolomite phases. Nonzoned, Ca-enriched, euhedral dolomites occur in calcite-cemented, coarse-grained limestone layers. These permeable layers probably were conduits for early meteoric waters, that occluded porosity in the limestones and prevented later dolomite stabilization. Irregularly luminescent dolomites are interpreted as intermediate fabrics in the dolomite stabilization process. Later calcite cements which occlude intercrystalline porosity prevented further dolomite replacement. Total recrystallization of remaining dolomites and formation of final dully luminescent mosaics occurred prior to brecciation and stylolitization.

Dolomite clumped isotope constraints on the oxygen isotope composition of the Phanerozoic Sea

Science.gov (United States)

Ryb, U.; Eiler, J. M.

2017-12-01

The δ18O value of the Phanerozoic Sea has been debated several decades, largely motivated by an 8‰ increase in δ18O of sedimentary carbonates between the Cambrian and the present. Some previous studies have interpreted this increase to be a primary depositional signal, resulting from an increase in the 18O content of ocean water over time, or from a decrease in ocean temperature increasing the oxygen isotope fractionation between seawater and carbonates. In contrast, other studies have interpreted lower δ18O compositions as the products of diagenetic alteration at elevated burial temperatures. Here, we show that the Phanerozoic dolomite δ18O record overlaps with that of well-preserved calcite fossils, and use carbonate clumped isotope measurements of Cambrian to Pleistocene dolomites to calculate their formation temperatures and the isotopic compositions of their parent-waters. The observed variation in dolomite δ18O is largely explained by dolomite formation at burial temperatures of up to 158°C. The δ18O values of dolomite parent-waters range -2 to +12‰ and are correlated with formation temperatures. Such correlation is consistent with the modification of seawater (0±2‰, VSMOW) toward isotopically heavier compositions through water-rock reactions at elevated burial temperatures. The similarity between the dolomite and calcite δ18O records, and published clumped isotope-based calculations of water compositions, suggests that like dolomite, temporal variations of the calcite δ18O record may also be largely driven by diagenetic alteration. Finally, the relationship we observe between temperature of dolomitization and d18O of dolomite suggests platform carbonates generally undergo dolomitization through reaction with modified marine waters, and that there is no evidence those waters were ever significantly lower in d18O than the modern ocean.

Structure and Stability of High-Pressure Dolomite with Implications for the Earth's Deep Carbon Cycle

Science.gov (United States)

Solomatova, N. V.; Asimow, P. D.

2014-12-01

Carbon is subducted into the mantle primarily in the form of metasomatically calcium-enriched basaltic rock, calcified serpentinites and carbonaceous ooze. The fate of these carbonates in subduction zones is not well understood. End-member CaMg(CO3)2 dolomite typically breaks down into two carbonates at 2-7 GPa, which may further decompose to oxides and CO2-bearing fluid. However, high-pressure X-ray diffraction experiments have recently shown that the presence of iron may be sufficient to stabilize dolomite I to high pressures, allowing the transformation to dolomite II at 17 GPa and subsequently to dolomite III at 35 GPa [1][2]. Such phases may be a principal host for deeply subducted carbon. The structure and equation of state of these high-pressure phases is debated and the effect of varying concentrations of iron is unknown, creating a need for theoretical calculations. Here we compare calculated dolomite structures to experimentally observed phases. Using the Vienna ab-initio simulation package (VASP) interfaced with a genetic algorithm that predicts crystal structures (USPEX), a monoclinic phase with space group 5 ("dolomite sg5") was found for pure end-member dolomite. Dolomite sg5 has a lower energy than reported dolomite structures and an equation of state that resembles that of dolomite III. It is possible that dolomite sg5 is not achieved experimentally due to a large energy barrier and a correspondingly large required volume drop, resulting in the transformation to metastable dolomite II. Due to the complex energy landscape for candidate high-pressure dolomite structures, it is likely that several competing polymorphs exist. Determining the behavior of high-pressure Ca-Mg-Fe(-Mn) dolomite phases in subduction environments is critical for our understanding of the Earth's deep carbon cycle and supercell calculations with Fe substitution are in progress. [1] Mao, Z., Armentrout, M., Rainey, E., Manning, C. E., Dera, P., Prakapenka, V. B., and Kavner, A

Dolomitization and sedimentary cyclicity of the Ordovician, Silurian, and Devonian rocks in South Estonia

Directory of Open Access Journals (Sweden)

Kallaste, Toivo

2006-03-01

Full Text Available The distribution and composition of dolomitized rocks and stoichiometry of dolomite in southern Estonia in the Ordovician, Silurian, and Devonian were studied on the background of the facies, sedimentary cyclicity (nine shallowing-up cycles, and evolution of the palaeobasins. The composition of rocks and lattice parameters of dolomite were investigated using the X-ray diffraction, X-ray fluorescence, titration and gravimetric analyses, and porosity measurements. The formation of dolostones is directly determined by the cyclic evolution of palaeobasins. Dolomitized rocks belong to the shallow-water inner shelf or tidal/lagoonal facies belt of regressive phases of sedimentary cycles. Sediments of the deep shelf/transitional environment and transgressive phases are not dolomitized. The most stoichiometric is secondary replacive dolomite of Silurian and upper Ordovician dolostones, formed during the early diagenesis of normal-marine (saline shallow-shelf calcitic sediments. The content of insoluble residue does not affect the stoichiometry. The changes in lattice parameters are induced by the Ca/Mg ratio in the dolomite lattice. The dolomite of the dolostones contacting limestone or containing calcite has an expanded lattice. The primary (syngenetic dolostone of the lagoonal or tidal flat belt has also an expanded lattice. No dolomitizing effect of the waters of the Devonian palaeobasin on the underlying rocks was revealed. The whole data set of the studied dolostones is consistent with the marine water environment in the palaeobasin at the corresponding time and shows no sign of the inflow of external fluids. It suggests that the microbial model of dolomite formation may characterize the Ordovician, Silurian, and Devonian in southern Estonia. The occurrence of dolostones between undolomitized rocks limits the time of dolomitization to the early diagenetic stage.

Andres Tali sõnavõtt ettekannete päeval = Andres Tali's speech given on the lecture day / Andres Tali

Index Scriptorium Estoniae

Tali, Andres, 1956-

2006-01-01

Kaasaegse Kunsti Eesti Keskuse ettekannete päev "Kunstnike moraalsed valikud kultuurikonfliktides" 27.04.2006 Tallinna Kunstihoones. Oma installatsioonist "Pastoraalne pastishsh" ning videost "Vägivald ja propaganda - The Movie" samas 8.04.-28.05.2006 avatud Elin Kardi, Marko Mäetamme, Marco Laimre ja Andres Tali ühisnäitusel "Vägivald ja propaganda"

Development and recent activity of the San Andrés landslide on El Hierro, Canary Islands, Spain

Science.gov (United States)

Klimeš, Jan; Yepes, Jorge; Becerril, Laura; Kusák, Michal; Galindo, Inés; Blahut, Jan

2016-05-01

Extremely voluminous landslides with a long run-out (also known as megalandslides) on oceanic volcanic islands are infrequent denudational processes on such islands. At the same time, they represent a major geological hazard that must be looked into to avoid negative consequences for the inhabitants of these islands. Their occurrence can be related to periods of intense seismo-volcanic activity, similar to that which occurred on El Hierro Island over 2011-2012. Landslides on volcanic islands are studied using onshore and offshore geological, geophysical and geomorphological records, considering their unique triggering conditions (e.g. lava intrusions, eruptive vents, magma chamber collapses). Previous work has pointed out similarities between specific cases of landslides on volcanic islands and deep-seated gravitational slope deformations (DSGSDs) which are typical in high mountain settings. Nevertheless, the methodological approaches and concepts used to investigate DSGSDs are not commonly applied on volcanic islands studies, even though their use may provide new information about the development stage, recent movements and future hazards. Therefore, this approach for studying the San Andrés landslide (SAL) on El Hierro (Canary Islands) has been developed applying a detailed morphological field mapping, an interpretation of digital elevation models, structural measurements, kinematic testing, and a precise movement monitoring system. The acquired information revealed a strong structural influence on the landslide morphology and the presence of sets of weakened planes acting as the sliding surfaces of the SAL or secondary landslides within its body. The presence of secondary landslides, deep erosive gullies, coastal cliffs and high on-shore relative relief also suggests a high susceptibility to future landslide movement. Direct monitoring on the landslide scarps and the slip plane, performed between February 2013 and July 2014, using an automated optical

Preparation and Characterization of Malaysian Dolomites as a Tar Cracking Catalyst in Biomass Gasification Process

Directory of Open Access Journals (Sweden)

M. A. A. Mohammed

2013-01-01

Full Text Available Three types of local Malaysian dolomites were characterized to investigate their suitability for use as tar-cracking catalysts in the biomass gasification process. The dolomites were calcined to examine the effect of the calcination process on dolomite’s catalytic activity and properties. The modifications undergone by dolomites consequent to thermal treatment were investigated using various analytical methods. Thermogravimetric and differential thermal analyses indicated that the dolomites underwent two stages of decomposition during the calcination process. The X-ray diffraction and Fourier-transform infrared spectra analyses showed that thermal treatment of dolomite played a significant role in the disappearance of the CaMg(CO32 phase, producing the MgO-CaO form of dolomite. The scanning electron microscopy microphotographs of dolomite indicated that the morphological properties were profoundly affected by the calcination process, which led to the formation of a highly porous surface with small spherical particles. In addition, the calcination of dolomite led to the elimination of carbon dioxide and increases in the values of the specific surface area and average pore diameter, as indicated by surface area analysis. The results showed that calcined Malaysian dolomites have great potential to be applied as tar-cracking catalysts in the biomass gasification process based on their favorable physical properties.

Maailmaparandajad / Ole Ry, Susanne Andres

Index Scriptorium Estoniae

Ry, Ole

2012-01-01

Terapeudid Ole Ry ja Susanne Andres räägivad Dr David Berceli loodud TRE (Tension & Trauma Releasing Exercises) harjutuste kasutamise kogemusest erinevate psüühiliste traumade ja pingetega klientide tervise parandamisel

Ab Initio Study of the Structure and Stability of High-Pressure Iron-Bearing Dolomite

Science.gov (United States)

Solomatova, N. V.; Asimow, P. D.

2016-12-01

Carbon is subducted into the mantle primarily in the form of metasomatically calcium-enriched basaltic rock, calcified serpentinites and carbonaceous ooze, all of which often contain dolomite. End-member CaMg(CO3)2 dolomite typically breaks down upon compression into two carbonates at 5-6 GPa in the temperature range of 800-1200 K [1]. However, high-pressure X-ray diffraction experiments have recently shown that the presence of iron may be sufficient to stabilize high-pressure dolomite over single-cation carbonates above 35 GPa [2,3]. The structure and equation of state of high-pressure dolomite phases have been debated, creating a need for theoretical calculations. Using density functional theory interfaced with a genetic algorithm that predicts crystal structures (USPEX), we have found a monoclinic phase with space group C2/c. The C2/c structure has a lower energy than previously reported dolomite structures at relevant pressures. It is possible that this phase is not achieved experimentally due to a large energy barrier and a correspondingly large required volume drop, resulting in the transformation to metastable dolomite II. We calculate the equation of state of trigonal dolomite, dolomite III and monoclinic C2/c dolomite to 80 GPa with 0 and 50 mol% CaFe(CO3)2 and compare their enthalpies to single-carbonate assemblages. Although end-member C2/c CaMg(CO3)2 dolomite is not stable relative to single-cation carbonates, C2/c CaMg0.5Fe0.5(CO3)2 is preferred over single-cation carbonates at high pressures. Thus, iron-bearing C2/c dolomite may be an important host phase for carbon in slabs subducted into the lower mantle. [1] Shirasaka, M., et al. (2002) American Mineralogist, 87, 922-930. [2] Mao, Z. et al. (2011) Geophysical Research Letters, 38. [3] Merlini, M. et al. (2012) Proceedings of the National Academy of Sciences, 109, 13509-13514.

Tectonics of the crystalline Basement of the Dolomites in North Italy

NARCIS (Netherlands)

Agterberg, F.P.

1961-01-01

The present thesis deals with a number of crystalline regions around the Dolomites in North Italy. The geographic position is shown on sheet I, which is depicted in fig. 105. The Dolomites proper consist mainly of Permotriassic, overlying a transgression plane, which cuts off the

Extraction of magnesium from calcined dolomite ore using hydrochloric acid leaching

Science.gov (United States)

Royani, Ahmad; Sulistiyono, Eko; Prasetiyo, Agus Budi; Subagja, Rudi

2018-05-01

Magnesium is widely used in varieties industrial sector. Dolomite is one source of magnesium besides seawater. The extraction of magnesium from dolomite ores can be done by leaching process. In this work, the dolomite leaching to extract magnesium by hydrochloric acid was investigated. The leaching experiments were performed in a spherical glass batch reactor having a capacity of 1000 ml. The effects of the stirring speed, acid concentration, reaction temperature and liquid-solid ratio for each reaction time of 1; 2; and 3 h on the Mg leaching have been evaluated. 5 ml of solution sample were collected from the leached solutions, then it was filtered prior to analysis by ICP OES. The experimental results show that the magnesium extraction increases along with the increase of acid concentration, liquid-solid ratio and temperature. The optimum conditions for magnesium extraction were achieved at temperature 75 °C, extraction time 3 h, the HCl concentration of 2 M, the liquid-solid ratio 20 ml/g and stirring speed of 400 rpm. At this condition 98, 82 % of magnesium were extracted from dolomite. The conclusion obtained from this leaching process is that the magnesium can be extracted from dolomite by using hydrochloric acid solutions.

DOLOMITE THERMAL-DECOMPOSITION MACROKINETIC MODELS FOR EVALUATION OF THE GASGENERATORS SORBENT SYSTEMS

Directory of Open Access Journals (Sweden)

K. V. Dobrego

2015-01-01

Full Text Available Employing dolomite in the capacity of a sorbent for generator gas purification is of considerable interest nowadays, as it is the impurity of generator gas that causes the major problem for creating cheep and effective co-generator plants. Designing gas purification systems employs simple but physically adequate macrokinetic models of dolomite thermal decomposition.  The  paper  analyzes  peculiarities  of  several  contemporaneous  models  of  dolomite and calcite thermal decomposition and infers on reasonable practicality for creating compact engineering dolomite-decomposition macrokinetic models and universal techniques of these models parameter reconstruction for specific dolomite samples. Such technics can be founded on thermogravimetric data and standard approximation error minimizing algorithms.The author assumes that CO2  evacuation from the reaction zone within the particle may proceed by diffusion mechanism and/or by the Darcy filtration and indicates that functional dependence of the thermal-decomposition rate from the particle sizes and the temperature differs for the specified mechanisms. The paper formulates four macrokinetic models whose correspondence verification is grounded on the experimental data. The author concludes that further work in this direction should proceed with the dolomite samples investigation and selecting the best approximation model describing experimental data in wide range of temperatures, warming up rates and the particle sizes.

Tectonics of the crystalline Basement of the Dolomites in North Italy

NARCIS (Netherlands)

Agterberg, F.P.

1961-01-01

The present thesis deals with a number of crystalline regions around the Dolomites in North Italy. The geographic position is shown on sheet I, which is depicted in fig. 105. The Dolomites proper consist mainly of Permotriassic, overlying a transgression plane, which cuts off the studied crystalline

Vi har uddelegeret forbruget og nydelsen til Netflix og de andre teknologigiganter

DEFF Research Database (Denmark)

Bak Herrie, Maja

2018-01-01

https://www.information.dk/debat/2018/05/uddelegeret-forbruget-nydelsen-netflix-andre-teknologigiganter......https://www.information.dk/debat/2018/05/uddelegeret-forbruget-nydelsen-netflix-andre-teknologigiganter...

Cafe Lyon = Cafe Lyon / Andres Labi

Index Scriptorium Estoniae

Labi, Andres, 1977-

2013-01-01

Cafe Lyon (Meistri 22, Tallinn) sisekujundusest. Autorid: Janno Roos, Andres Labi, Kristel Jakobson (Ruumilabor). Prantsuse Lütseumi direktori Lauri Leesi arvamus. Disainibüroo Ruumilabor lühitutvustus

Taxonomic and floristic novelties for Echeveria ( Crassulaceae ) in Central Michoacan, Mexico

OpenAIRE

Garc?a-Ruiz, Ignacio; Valent?n-Mart?nez, Dagoberto; Carrillo-Reyes, Pablo; Costea, Mihai

2016-01-01

Abstract A new species, Echeveria coruana , is described and illustrated from the malpa?s near San Andr?s Cor?, Michoacan, Mexico. The species belongs to series Gibbiflorae and the new taxon was compared with Echeveria purhepecha and Echeveria patriotica , with whom it shares the closest morphological affinities. Additionally, Echeveria yalmanantlaensis an endangered species from Sierra of Manantl?n Biosphere Reserve, State of Colima, was also discovered near San Andr?s Cor? and is reported f...

Impact of diagenesis and low grade metamorphosis on Triassic sabkha dolomite δ26Mg

Science.gov (United States)

Immenhauser, A.; Geske, A.; Richter, D.; Buhl, D.; Niedermayr, A.

2012-12-01

Dolomite is a common rock forming mineral in the geological record but its value as archive of ancient seawater δ26Mg signatures and their variations in time are at present underexplored. Unknown factors include the sensitivity of δ26Mg ratio to processes in the diagenetic and low grade metamorphic domain. Here, we document and discusses the first detailed δ26Mg data set from early diagenetic and burial dolomites. Samples come from the Upper Triassic Hauptdolomit (Dolomia Principale; The Dolomites, Italy) and include coeval dolmicrites that underwent differential burial diagenesis in a temperature range between about 100 and more than 350°C. As indicated by dolmicrite 87/86Sr ratios, sabkha calcian D1 dolomites precipitated from evaporated seawater and stabilized at an early diagenetic stage to D2 dolomites analysed here. With increasing burial temperature, dolomite δ26Mg ratio scatter in the data set decreases with increasing Mg/Ca ratio and degree of order. Specifically, δ26Mg ratio variability is reduced from ~0.7‰ at burial temperatures beneath 100°C to about ~0.2‰ at temperatures in excess of 350°C, respectively, with mean δ26Mg values ranging constantly near -1.9‰. This suggests that, at least for the rock buffered system investigated here, dolmicrite δ26Mg proxy data are conservative and preserve near pristine values even at elevated burial temperatures. At present, the main element of uncertainty is the Mg-isotope fractionation factor between (evaporated) seawater and dolomite. A possible solution to this problem includes the compilation of a data from modern sabkha environments including pore water and calcian dolomite δ26Mg isotope signatures.

Andres Tolts 60 : omanäoliste vaikelude imeline maailm / Andres Tolts ; intervjueerinud Tiina Kolk ; kommenteerinud Jaan Elken

Index Scriptorium Estoniae

Tolts, Andres, 1949-2014

2009-01-01

Andres Toltsi näitused "Asjad" Hobusepea galeriis 12. oktoobrini, "Näitus" Tallinna Kunstihoones 25. oktoobrini, "Varane Tolts" Haus galeriis 13. novembrini. Pikemalt näitusest "Näitus", kuraator Harry Liivrand

Biolaminoid facies in a peritidal sabkha: Permian Platy Dolomite of northern Poland

Science.gov (United States)

Brehm, Ulrike; Gasiewicz, Andreij; Gerdes, Giesela; Krumbein, Wolfgang

The Platy Dolomite, a carbonate unit in the Zechstein Formation (Upper Permian) of the Leba Elevation, Poland, was deposited in a semi-closed or completely separated back-barrier sabkha environment. This arid, hypersaline zone is comparable to the recent Gavish Sabkha, Sinai. The processes which formed the modern Gavish Sabkha are similar to those responsible for the biolaminoid formation in the Platy Dolomite series. The deposition of this Platy Dolomite was mainly the result of microbial activity building extensive microbial mats. The Platy Dolomite is characterized by loosely packed microbial biolaminoids (a less significantly laminated build-up of biogenetic sediments) with horizontally or obliquely to vertically orientated filaments. Intermediary coated grains occur. Densely packed, flat laminated stromatolitic rocks, pure oolites, and bioclastic sedimentary strata are rarely intercalated with the biolaminoid beds. Laboratory and field investigations indicate that carbonate formation was induced by the chemoorganotrophic bacterial decay of cyanobacterial mats. Magnesium was bound and absorbed by organic matter and later liberated by anaerobic decay. Early diagenetic processes formed Mg2+- and Ca2+-enriched solutions in which carbonates precipitated biologically and chemically. A system of biogenic carbonate formation of the Platy Dolomite microbiolite series is proposed and supported by the results of microbiological laboratory studies.

Ferroan dolomites in Miocene sediments of the Xisha Islands and their genetic model

Science.gov (United States)

Xu, Hong; Zhang, Weiwei; Wei, Kai; He, Qingkun; Jiang, Yunshui; Xu, Tingting; Jiang, Xuejun; Yan, Guijing; Song, Hongying; Wang, Jianghai

2018-01-01

Carbonate rocks are important reservoirs for global petroleum exploration. The largest oilfield in the South China Sea, Liuhua 11-1, is distributed in the massive carbonate reef area of the Zhujiang (Pearl) River Mouth Basin. Previous studies showed that one 802.17-m-long core from well Xichen-1 in the South China Sea mainly consisted of white and light gray-white organic reefs. Recently, a Miocene whole core (161.9 m long) of well Xiyong-2, near well Xichen-1, was found to contain six layers of yellowish brown, light yellowish gray, iron black, or light yellowish gray-white organic reefs. Scanning electron microscope images of these layers reveal a typical ferroan dolomite rich in Fe (up to 29%), with the high concentrations of Mn, Cu, W, Zn, Cr, Ni, and Co. Systematic X-ray powder diffraction analysis yields a 1.9-6.1 match in phase ratio with ankerite, 5.4-26.9 with dolomite, and zero with calcite, which indicate that the samples can be classified as ferroan dolomite. The iron and heavy metals are inferred to be originated from multiple volcanic eruptions of Gaojianshi Island in the Dongdao Atoll during the middle-late Miocene. These elements were dissolved in seawater, likely as a sol, and carried to Yongxing Island in the Xuande Atoll by sea currents and tides enhanced by prevailing winds, and deposited as a part of the sedimentation process in the study area. The ferroan dolomite has Sr content of (125-285)×10-6, which is lower than the accepted Sr boundary value of dolomite. This finding suggests that dolomitization occurred during large-scale global glacial regression in the late Miocene. The isolated Xisha carbonate platform, exposed to air, underwent freshwater leaching and dolomitization induced by mixed water, and caused the extensive Fe-Mg exchange along the organic reef profile to form ankerite and ferroan dolomite. These results may help to understand paleoceanographic environmental changes in the South China Sea during the Miocene.

Empirical Calibration for Dolomite Stoichiometry Calculation: Application on Triassic Muschelkalk- Lettenkohle Carbonates (French Jura Calibration empirique pour le calcul de la stoechiométrie de la dolomite : application aux carbonates triasiques du Muschelkalk-Lettenkohle (Jura français

Directory of Open Access Journals (Sweden)

Turpin M.

2012-02-01

Full Text Available This study concerns an approach for dolomite quantification and stoichiometry calculation by using X-ray diffractometry coupled with cell and Rietveld refinements and equipped with a newly substantial database of dolomite composition. A greater accuracy and precision are obtained for quantifying dolomite as well as other mineral phases and calculating dolomite stoichiometry compared to the classical “Lumsden line” and previous methods. The applicability of this approach is verified on dolomite reference material (Eugui and on Triassic (Upper Muschelkalk-Lettenkohle carbonates from the French Jura. The approach shown here is applicable to bulk dolostones as well as to specific dolomite cements and was combined with petrographical and isotopic analyses. Upper Muschelkalk dolomites were formed during burial dolomitization under fluids characterized by increased temperature and variable isotopic composition through burial. This is clear from their Ca content in dolomites which gradually approaches an ideal stoichiometry (from 53.16% to 51.19% through increasing dolomitization. Lettenkohle dolostones consist of near-ideal stoichiometric (51.06%Ca and well-ordered dolomites associated with anhydrite relicts. They originated through both sabkha and burial dolomitization. This contribution gives an improved method for the characterization of different dolomite types and their distinct traits in sedimentary rocks, which allows a better evaluation of their reservoir potential. Cette étude propose une approche pour la quantification de la dolomite et le calcul de sa stoechiométrie grâce à l’utilisation de la diffraction des rayons X couplée aux affinements de maille et de Rietveld et complétée par de nombreuses données issues de la littérature. Elle permet d’obtenir une meilleure justesse et précision pour la quantification de la dolomite (et des autres phases minérales ainsi que pour le calcul de sa stoechiométrie par rapport à l�

Thermal decomposition of dolomite under CO2: insights from TGA and in situ XRD analysis.

Science.gov (United States)

Valverde, Jose Manuel; Perejon, Antonio; Medina, Santiago; Perez-Maqueda, Luis A

2015-11-28

Thermal decomposition of dolomite in the presence of CO2 in a calcination environment is investigated by means of in situ X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The in situ XRD results suggest that dolomite decomposes directly at a temperature around 700 °C into MgO and CaO. Immediate carbonation of nascent CaO crystals leads to the formation of calcite as an intermediate product of decomposition. Subsequently, decarbonation of this poorly crystalline calcite occurs when the reaction is thermodynamically favorable and sufficiently fast at a temperature depending on the CO2 partial pressure in the calcination atmosphere. Decarbonation of this dolomitic calcite occurs at a lower temperature than limestone decarbonation due to the relatively low crystallinity of the former. Full decomposition of dolomite leads also to a relatively low crystalline CaO, which exhibits a high reactivity as compared to limestone derived CaO. Under CO2 capture conditions in the Calcium-Looping (CaL) process, MgO grains remain inert yet favor the carbonation reactivity of dolomitic CaO especially in the solid-state diffusion controlled phase. The fundamental mechanism that drives the crystallographic transformation of dolomite in the presence of CO2 is thus responsible for its fast calcination kinetics and the high carbonation reactivity of dolomitic CaO, which makes natural dolomite a potentially advantageous alternative to limestone for CO2 capture in the CaL technology as well as SO2in situ removal in oxy-combustion fluidized bed reactors.

Geim, Prof. Sir Andre Konstantin

Indian Academy of Sciences (India)

Fellow Profile. Elected: 2015 Honorary. Geim, Prof. Sir Andre Konstantin FRS. Date of birth: 21 October 1958. Address: Royal Society Research Professor, University of Manchester, Oxford Road, Manchester M13 9PL, UK Contact: Office: (+44-161) 275 4120. Email: geim@manchester.ac.uk. YouTube; Twitter; Facebook ...

Optimasi Dosis Pupuk Dolomit pada Tanaman Kelapa Sawit (Elaeis Guineensis Jacq. Belum Menghasilkan Umur Satu Tahun

Directory of Open Access Journals (Sweden)

- Sudradjat

2015-09-01

Full Text Available Kelapa sawit merupakan komoditi perkebunan utama karena sebagai sumber devisa negara dan menyediakan lapangan kerja. Indonesia adalah negara produsen terbesar kelapa sawit di dunia dengan luas areal mencapai 10.1 juta hektar. Peningkatan produktivitas dicapai dengan intensifikasi antara lain dengan melakukan rasionalisasi pemupkan. Penelitian ini bertujuan untuk menentukan dosis optimum pupuk dolomit pada tanaman kelapa sawit belum menghasilkan umur satu tahun. Penelitian ini dilaksanakan di Kebun Pendidikan dan Penelitian Kelapa Sawit IPB-Cargill, Jonggol, Bogor dari bulan Maret 2013 sampai Maret 2014. Rancangan yang digunakan adalah Faktorial Tunggal,  dosis pupuk dolomit,  yang disusun dalam lingkungan Acak Kelompok dengan tiga ulangan. Dosis pupuk dolomit yang diuji  terdiri atas 0, 200, 400, dan 600 g tanaman-1 tahun-1. Hasil penelitian menunjukkan bahwa pupuk dolomit meningkatkan secara nyata terhadap peubah tinggi tanaman, diameter batang, jumlah daun, dan kandungan khlorofil daun, namun tidak berpengaruh terhadap kandungan Mg dalam jaringan daun. Berdasarkan tanggap peubah tinggi tanaman, dosis optimum pupuk dolomit untuk tanaman kelapa sawit pada umur satu tahun adalah 306.4 g dolomit tanaman-1tahun -1. Kata kunci: dolomit, dosis optimum, kelapa sawit, respons fisiologi, respons morfologi.

Geology of dolomite-hosted uranium deposits at the Pitch Mine, Saguache County, Colorado

International Nuclear Information System (INIS)

Nash, J.T.

1981-01-01

Newly documented uranium ore in the Pitch mine occurs chiefly in brecciated Mississippian Leadville Dolomite along the Chester upthrust zone, and to a lesser extent in sandstone, siltstone, and carbonaceous shale of the Pennsylvanian Belden Formation and in Precambrian granitic rocks and schist. Uranium-mineralized zones are generally thicker, more consistent, and of higher grade in dolomite than in other hosts, and roughly 50 percent of the new reserves are in dolomite. Strong physical control by dolomite is evident, as this is the only rock type that is pervasively brecciated within the fault slices that make up the footwall of the reverse-fault zone. Other rocks tended to either remain unbroken or undergo ductile deformation. Chemical controls on uranium deposition are subtle and appear chiefly to involve coprecipitation of FeS 2 as pyrite and marcasite, suggesting that sulfide ion may be the reductant

El naturalista Alejando de Humboldt, Cavanilles y Juan Andrés

Directory of Open Access Journals (Sweden)

María-Rosario MARTÍ MARCO

2009-11-01

Full Text Available RESUMEN: Tras una breve introducción en la que se traza un paralelismo entre el erudito Juan Andrés y el naturalista Alejandro de Humboldt, se presenta una síntesis de la relevancia del viaje científico de Humboldt iniciado en España. Las referencias sobre la figura y trabajo de Humboldt y, en menor medida, sobre Cavanilles en la gran obra total de Andrés demuestran el vigor intelectual de éste, quien subraya muchos de los elementos fundamentales del legado humboldtiano.ABSTRACT: This paper begins with a brief introduction to the similarities between the scholar Juan Andrés and the naturalist Alexander von Humboldt and continues with a summary of the relevance of Humboldt’s scientific expedition which began in Spain. The references to Humboldt’s persona and endeavours, and to a lesser extent to Cavanilles, in all of Andrés’ great works demonstrate the intellectual ability of the author who pinpoints many of the fundamental aspects of Humboldt’s legacy.

Origins and Geochemistry of Oolitic Dolomite of the Feixianguan Formation from the Yudongzi Outcrop, Northwest Sichuan Basin, China

Directory of Open Access Journals (Sweden)

Liya Zhang

2017-07-01

Full Text Available The topic of dolomite formation has long presented a challenge to researchers. In this study, the origin of widely occurring oolitic dolomites from the Yudongzi outcrop in the lower Triassic Feixianguan formation in northwest Sichuan, China, was investigated through petrographic observations, and mineralogical and geochemical analysis. Analytical methods used include cathodoluminescence, X-ray diffraction, stable isotopes, and electronic microprobe characterization. The dolomites were categorized into three major genetic types according to their textural and structural characteristics, which reflect their various origins. The first genetic type of these dolomites, seepage reflux dolomitization, occurs in marly to microcrystalline dolomite during the penecontemporaneous stage, and displays negatively skewed δ18Ο (−2.83‰ Pee Dee Belemnite (PDB, positively skewed δ13C (2.71‰ PDB, a low degree of order (0.48, and 87Sr/86Sr ratios of 0.707509–0.707634, indicating involvement of a Mg-rich brine fluid in an open evaporative environment. The second type, shallow burial dolomitization, is the most significant genetic type of dolomite reservoir in this area. This process produced dominantly silty to fine crystalline dolomite in a platform-margin oolitic beach facies with negatively skewed δ18Ο (−3.26‰ PDB, positively skewed δ13C (1.88‰ PDB, a high degree of order (0.70, and 87Sr/86Sr ratios of 0.707318–0.707661, which are related to seawater-derived fluids in a shallow burial environment. The third type is moderate to deep burial dolomitization, and is the main process responsible for zoned dolomite and dolomite with cloudy cores and clear rims (CCCR dolomite, which have the most strongly negatively skewed δ18Ο (−7.32‰ PDB, positively skewed δ13C (3.02‰ PDB, and 87Sr/86Sr ratios of 0.707217–0.707855, representing diagenetic alteration and fluid flow in a closed environment. These findings indicate that dolomite was likely

Graafikatriennaali peapreemia Andres Talile

Index Scriptorium Estoniae

2001-01-01

Tallinna XII graafikatriennaali preemiad: grand prix - Andres Tali; 3 võrdset preemiat - Janne Laine, Leonards Laganovskis, Peeter Laurits; diplomid - Lynne Allen, Lucrecia Urbano, Vladimir Tshaika, Zora Stanè, Endi Poskovic, Päivikki Kallio; EKM preemia - Tif Bitmap; Tallinna linna preemia - Ülle Marks ja Jüri Kass; eripreemiad: - J. Laine (Eesti Pank), Vive Tolli (Paletti Eesti AS), Martins Ratniksh, Juris Boiko, T. Bitmap (Balteco AS). Žürii koosseis

The kinetics of dolomite reaction rim growth under isostatic and non-isostatic pressure conditions

Science.gov (United States)

Helpa, V.; Rybacki, E.; Morales, L. G.; Abart, R.; Dresen, G. H.

2013-12-01

During burial and exhumation, rocks are simultaneously exposed to metamorphic reactions and tectonic stresses. Therefore, the reaction rate of newly formed minerals may depend on chemical and mechanical driving forces. Here, we investigate the reaction kinetics of dolomite (CaMg[CO3]2) rim growth by solid-state reactions experiments on oriented calcite (CaCO3) and magnesite (MgCO3) single crystals under isostatic and non-isostatic pressure conditions. Cylindrical samples of 3-5 mm length and 7 mm diameter were drilled and polished perpendicular to the rhombohedral cleavage planes of natural clear crystals. The tests were performed using a Paterson-type deformation apparatus at P = 400 MPa confining pressure, temperatures, T, between 750 and 850°C, and reaction durations, t, of 2 - 146 h to calculate the kinetic parameters of dolomite rim growth under isostatic stress conditions. For non-isostatic reaction experiments we applied in addition differential stresses, σ, up to 40 MPa perpendicular to the contact interface at T = 750°C for 4 - 171 h duration, initiating minor inelastic deformation of calcite. The thickness of the resulting dolomite reaction rims increases linearly with the square root of time, indicating a diffusion-controlled reaction. The rims consist of two different textural domains. Granular dolomite grains (≈ 2 -5 μm grain size) form next to calcite and elongated palisade-shaped grains (1-6 μm diameter) grow perpendicular to the magnesite interface. Texture measurements with the electron backscatter diffraction technique indicate that the orientations of dolomite grains are mainly influenced by the orientation of the calcite educt crystal, in particular in the granular rim. To some extent, the texture of dolomite palisades is also influenced by the orientation of magnesite. The thickness of the two individual layers increases with temperature. At 400 MPa isostatic pressure, T = 750°C and t = 29 hours, a 5 μm thick granular dolomite layer

Igale inimesele oma inspektor? / Andre Nõmm

Index Scriptorium Estoniae

Nõmm, Andre

2007-01-01

Finantsinspektsiooni finantsjärelevalve divisjoni juhataja Andre Nõmm on seisukohal, et finantsinspektsiooni ülesanne ei ole valvata iga kodaniku finantsriski maandamist, vaid vastutust peab kandma iga inimene ise. Ometi on riigi eesmärk tõsta oma kodanike teadlikkust laenuturul valitsevatest ohtudest

André François Boshoff

African Journals Online (AJOL)

Campbell Murn

1945-2016) and pay tribute to him. An only child, André spent most of his childhood in very remote areas of southern Africa due to his magistrate father's various postings. Such locations, for example coastal. Transkei and the Caprivi Strip, instilled ...

Descripción morfoagronómica de materiales de plátano (Musa AAB, ABB y banano (Musa AAA cultivados en San Andrés Isla

Directory of Open Access Journals (Sweden)

Oscar Javier Parra Pachón

2009-10-01

Full Text Available Durante el primer semestre de 2005 se estudiaron los cultivares de plátano y banano en fincas y parcelas de 15 agricultores típicos participantes en programas conjuntos de la Secretaría de Agricultura y Pesca de San Andrés Isla y de la Universidad Nacional de Colombia sede Caribe. A partir de descriptores de INIBAP, IPGRI y CIRAD y revisiones bibliográficas.se describen morfológicamente los materiales de Musa cultivados en la Isla, así como las prácticas de los productores isleños, Se identificaron cuatro clones del subgrupo plátano (Musa AAB: un Hartón (‘Horse’ y tres Dominico-Hartón (‘Tallo Negro’, ‘Tallo Blanco’ y ‘Cincuenta’ del subgrupo ABB se hallaron un material de Bluggoe (‘Boscó’ y un Felipita. El subgrupo banano AAA presentó dos materiales Gros Michel (denominados Común y Chino y uno de banano (Rojo. El plátano tiene gran importancia para los agricultores de la Isla, siendo el Boscó el clon más aceptado entre consumidores por su adaptación a las condiciones edafológicas y climáticas. El banano es menos cultivado; ya que los suelos, el clima y las enfermedades como sigatoka negra, condicionaron el desarrollo de clones. El trabajo sugiere prácticas de fácil implementación que podrían aumentar la producción en los sistemas de huerto mixto tropical que predominan en la Isla.

Descripción morfoagronómica de materiales de plátano (Musa AAB, ABB y banano (Musa AAA cultivados en San Andrés Isla

Directory of Open Access Journals (Sweden)

Parra Pachón Oscar Javier

2009-12-01

Full Text Available Durante el primer semestre de 2005 se estudiaron los cultivares de plátano y banano en fincas y parcelas de 15 agricultores típicos participantes en programas conjuntos de la Secretaría de Agricultura y Pesca de San Andrés Isla y de la Universidad Nacional de Colombia sede Caribe. A partir de descriptores de INIBAP, IPGRI y CIRAD y revisiones bibliográficas.se describen morfológicamente los materiales de Musa cultivados en la Isla, así como las prácticas de los productores isleños, Se identificaron cuatro clones del subgrupo plátano (Musa AAB: un Hartón (‘Horse’ y tres Dominico-Hartón (‘Tallo Negro’, ‘Tallo Blanco’ y ‘Cincuenta’ del subgrupo ABB se hallaron un material de Bluggoe (‘Boscó’ y un Felipita. El subgrupo banano AAA presentó dos materiales Gros Michel (denominados Común y Chino y uno de banano (Rojo. El plátano tiene gran importancia para los agricultores de la Isla, siendo el Boscó el clon más aceptado entre consumidores por su adaptación a las condiciones edafológicas y climáticas. El banano es menos cultivado; ya que los suelos, el clima y las enfermedades como sigatoka negra, condicionaron el desarrollo de clones. El trabajo sugiere prácticas de fácil implementación que podrían aumentar la producción en los sistemas de huerto mixto tropical que predominan en la Isla.

Ecological indices of manufacture of Portland cement clinker and production of the dolomite clinker

Directory of Open Access Journals (Sweden)

Vinnichenko Varvara

2017-01-01

Full Text Available It is shown that the production of dolomite clinker in comparison with that of Portland cement is environmentally appropriate. When calcining dolomite for cementitious binder, the pollution of the atmosphere by carbon dioxide is reduced due to its isolation during decarbonization reactions of calcium carbonates. Reducing fuel consumption for clinker burning provides less carbon dioxide emissions from combustion products. Reducing the firing temperature creates obstacles to the formation of nitrogen oxides. The production of binders from dolomite in comparison with the production of Portland cement helps to protect the environment from contamination

Effects of dicyandiamide and dolomite application on N2O emission from an acidic soil.

Science.gov (United States)

Shaaban, Muhammad; Wu, Yupeng; Peng, Qi-an; Lin, Shan; Mo, Yongliang; Wu, Lei; Hu, Ronggui; Zhou, Wei

2016-04-01

Soil acidification is a major problem for sustainable agriculture since it limits productivity of several crops. Liming is usually adopted to ameliorate soil acidity that can trigger soil processes such as nitrification, denitrification, and loss of nitrogen (N) as nitrous oxide (N2O) emissions. The loss of N following liming of acidic soils can be controlled by nitrification inhibitors (such as dicyandiamide). However, effects of nitrification inhibitors following liming of acidic soils are not well understood so far. Here, we conducted a laboratory study using an acidic soil to examine the effects of dolomite and dicyandiamide (DCD) application on N2O emissions. Three levels of DCD (0, 10, and 20 mg kg(-1); DCD0, DCD10, and DCD20, respectively) were applied to the acidic soil under two levels of dolomite (0 and 1 g kg(-1)) which were further treated with two levels of N fertilizer (0 and 200 mg N kg(-1)). Results showed that N2O emissions were highest at low soil pH levels in fertilizer-treated soil without application of DCD and dolomite. Application of DCD and dolomite significantly (P ≤ 0.001) reduced N2O emissions through decreasing rates of NH4 (+)-N oxidation and increasing soil pH, respectively. Total N2O emissions were reduced by 44 and 13% in DCD20 and dolomite alone treatments, respectively, while DCD20 + dolomite reduced N2O emissions by 54% when compared with DCD0 treatment. The present study suggests that application of DCD and dolomite to acidic soils can mitigate N2O emissions.

Tehnikahuviline juht ootab töötajalt ausust / Andres Haamer ; interv. Urve Vilk

Index Scriptorium Estoniae

Haamer, Andres, 1942-

2008-01-01

Overall Eesti nõukogu esimees Andres Haamer vastab oma lapsepõlve, haridusteed, karjääri, AS-i Overalli asutamist, oma tööülesandeid ning ühiskondlikus elus osalemist puudutavatele küsimustele. Kommenteerib Valdo Kalm. Lisa: Andres Haamer; Edu võtmed

Influence of ameliorating soil acidity with dolomite on the priming of soil C content and CO2 emission.

Science.gov (United States)

Shaaban, Muhammad; Wu, Lei; Peng, Qi-An; van Zwieten, Lukas; Chhajro, Muhammad Afzal; Wu, Yupeng; Lin, Shan; Ahmed, Muhammad Mahmood; Khalid, Muhammad Salman; Abid, Muhammad; Hu, Ronggui

2017-04-01

Lime or dolomite is commonly implemented to ameliorate soil acidity. However, the impact of dolomite on CO 2 emissions from acidic soils is largely unknown. A 53-day laboratory study was carried out to investigate CO 2 emissions by applying dolomite to an acidic Acrisol (rice-rapeseed rotation [RR soil]) and a Ferralsol (rice-fallow/flooded rotation [RF soil]). Dolomite was dosed at 0, 0.5, and 1.5 g 100 g -1 soil, herein referred to as CK, L, and H, respectively. The soil pH (H2O) increased from 5.25 to 7.03 and 7.62 in L and H treatments of the RR soil and from 5.52 to 7.27 and 7.77 in L and H treatments of the RF soil, respectively. Dolomite application significantly (p ≤ 0.001) increased CO 2 emissions in both RR and RF soils, with higher emissions in H as compared to L dose of dolomite. The cumulative CO 2 emissions with H dose of dolomite were greater 136% in the RR soil and 149% in the RF soil as compared to CK, respectively. Dissolved organic carbon (DOC) and microbial biomass carbon (MBC) increased and reached at 193 and 431 mg kg -1 in the RR soil and 244 and 481 mg kg -1 in the RF soil by H treatments. The NH 4 - -N and NO 3 - -N were also increased by dolomite application. The increase in C and N contents stimulated microbial activities and therefore higher respiration in dolomite-treated soil as compared to untreated. The results suggest that CO 2 release in dolomite-treated soils was due to the priming of soil C content rather than chemical reactions.

The influence of solution composition and grain boundaries on the replacement of calcite by dolomite

Science.gov (United States)

Moraila Martinez, Teresita de Jesus; Putnis, Christine V.; Putnis, Andrew

2016-04-01

Dolomite formation is a mineral replacement reaction that affects extensive rock volumes and comprises a large fraction of oil and gas reservoirs [1,2]. The most accepted hypothesis is the 'dolomitization' of limestone by Mg-rich fluids [3]. The objective of this research is to study the replacement mechanism of calcite by dolomite, the role of grain boundaries, highlighted by Etschmann et al. (2014), and the possible influence of solutions in dolomite formation under the presence of ions that are normally in crustal aqueous fluids. To accomplish this purpose, we performed hydrothermal experiments using Carrara marble cubes of ~1.5 mm size and 7-9 mg weight as starting material, reacted with 1M (Mg,Ca)Cl2 aqueous solutions, with Mg/Ca ratios of 3 and 5 at 200°C, for different reaction times. Additional experiments were performed adding 1mM of Na2SO4, NaCl or NaF to the previous solutions. After the reaction, the product phases were identified using Raman spectroscopy, X-Ray powder diffraction (XRD), electron microprobe analysis (EMPA), and the textural evolution was studied by scanning electron microscopy (SEM). Samples reacted with aqueous solutions resulted in the replacements of the calcite rock into magnesite and dolomite. The amount and type of reaction strongly depends on the Mg/Ca ratio. Samples reacted with a Mg/Ca ratio of 5 resulted in an almost complete replacement reaction and more favorable for magnesite formation than for dolomite. When the Mg/Ca ratio was 3 dolomite formed but the replacement was located in the core of the sample. We show that grain boundaries are very important for the infiltration of solution and the progress of a replacement reaction, acting as fluid pathways. Solution composition controls the nature of the replacement product. Acknowledgment: This work is funded within a Marie Curie EU Initial Training Network- CO2-React. 1. Etschmann B., Brugger J., Pearce M.A., Ta C., Brautigan D., Jung M., Pring A. (2014). Grain boundaries as

André B. Muller (25.9.1918-1.4.2006)

Science.gov (United States)

West, R. M.

2006-06-01

With great sadness, we have learned about the death of André Muller on 1 April, at the age of 87. Living in retirement in his native Holland since 1983, he was one of ESOs true pioneers, an outstanding representative of the select group of European astronomers who succeeded in steering ESO through the difficult initial phases. André was close-ly associated with the entire process, from the first site monitoring programmes in South Africa to the subsequent search in Chile, the decision in favour of the La Silla site, as well as the management of ESOs early activities in Chile, includ-ing the construction of the headquarters and observatory and the installation of the first generation of ESO telescopes. Few persons, if any, have been so inti-mately connected to the setting-up of ESOs facilities and it would be impossible to list in detail all of the services André performed for the organisation with such great expertise and zeal during his long career.

Substrate pH and butterfly bush response to dolomitic lime or steel slag amendment

Science.gov (United States)

Steel slag is a fertilizer amendment with a high concentration of calcium oxide, and thus capable of raising substrate pH similar to dolomitic lime. Steel slag, however, contains higher concentrations of some nutrients, such as iron, manganese, and silicon, compared to dolomitic lime. The objectiv...

Model study of initial adsorption of SO2 on calcite and dolomite

International Nuclear Information System (INIS)

Malaga-Starzec, Katarina; Panas, Itai; Lindqvist, Oliver

2004-01-01

The rate of calcareous stone degradation is to a significant extent controlled by their surface chemistry with SO 2 . Initial surface sulphite is converted to a harmful gypsum upon, e.g. NO 2 catalysed oxidation. However, it has been observed by scanning electron microscopy that the lateral distributions of gypsum crystals differ between calcitic and dolomitic marbles. The first-principles density functional theory is employed to understand the origin of these fundamentally different morphologies. Here, the stability differences of surface sulphite at calcite CaCO 3 (s) and dolomite Ca x Mg 1-x CO 3 (s) are determined. A qualitative difference in surface sulphite stability, favouring the former, is reported. This is taken to imply that calcitic micro-crystals embedded in a dolomitic matrix act as sinks in the surface sulphation process, controlled by SO 2 diffusion. The subsequent formation of gypsum under such conditions will not require SO 4 2- (aq) ion transport. This explains the homogeneous distribution of gypsum observed on the calcitic micro-crystals in dolomite. In contrast, sulphation on purely calcitic marbles never reaches such high SO 2 coverage. Rather, upon oxidation, SO 4 2- (aq) transport to nucleation centres, such as grain boundaries, is required for the growth of gypsum crystals

Messinian Salinity Crisis' Primary Evaporites: the shallow gypsum vs. deep dolomite formation paradox solved

Science.gov (United States)

De Lange, G. J.; Krijgsman, W.

2015-12-01

The Messinian Salinity Crisis (MSC) is a dramatic event that took place ~ 5.9 Ma ago, resulting in deposition of 1-3 km thick evaporites at the Mediterranean seafloor. A considerable, long-lasting controversy existed on the modes of their formation, including the observed shallow gypsum versus deep dolostone deposits for the early phase of MSC. The onset of MSC is marked by deposition of gypsum/sapropel-like alternations, thought to relate to arid/humid climate conditions at a precessional rhythm. Gypsum precipitation only occurred at marginal- and dolomite formation at deeper settings. A range of potential explanations was given, most of which cannot satisfactorily explain all observations. Biogeochemical processes during MSC are commonly neglected but may explain that different deposits formed in shallow vs deep environments without exceptional physical boundary conditions for each. A unifying mechanism is presented in which gypsum formation occurs at all shallow water depths but its preservation is limited to shallow sedimentary settings. In contrast, ongoing deep-basin anoxic organic matter (OM) degradation processes result in dolomite formation. Gypsum precipitation in evaporating seawater takes place at 3-7 times concentrated seawater; seawater is always oversaturated relative to dolomite but its formation is inhibited by the presence of dissolved sulphate. Thus conditions for formation of gypsum exclude those for formation of dolomite and vice versa. Another process linking the saturation states of gypsum and dolomite is that of OM degradation by sulphate reduction. In stagnant deep water, ongoing OM-degradation may result in reducing the sulphate and enhancing the dissolved carbonate content. Such low-sulphate / high carbonate conditions in MSC deepwater are. unfavorable for gypsum preservation and favorable for dolomite formation, and always coincide with anoxic, i.e. oxygen-free conditions. Including dynamic biogeochemical processes in the thusfar static

Andres Sütevaka näitus Stockholmis

Index Scriptorium Estoniae

2000-01-01

Sütevaka Andrese abstraktsete maalide näitus Stockholmi Eesti Majas. Sütevaka Andres ja näituse avamisele sõitnud tema loomingu kollektsionäär Matti Milius kohtusid Moderna Museeti direktori David Elliotiga teadvustamaks Tartu ja Pärnu kunstielu.

"Vettpidavad allikad" = "Watertight sources" / Janno Roos, Andres Labi

Index Scriptorium Estoniae

Roos, Janno, 1976-

2013-01-01

Eesti Ajaloomuuseumis avatud näituse kujundasid Janno Roos ja Andres Labi (Ruumilabor). Kuraator Krista Sarv. Graafiline disain: Identity. Eksponeeritud allveeuuringute käigus leitu. Arhitektuuriajaloolase Leele Välja arvamus

Dissolution Kinetics of Icel-Aydincik Dolomite in Hydrochloric Acid

African Journals Online (AJOL)

NJD

Department of Mining Engineering, Faculty of Engineering and Architecture, Cukurova University, Balcali, ... 65 °C. It was observed that heterogeneous chemical reactions ..... Dolomite, Ph.D. thesis, Cukurova University, Adana, Turkey, 2004.

Transport of barium through dolomite rocks under the presence of guar gum and brine salinities of hydraulic fracturing wastewater

Science.gov (United States)

Ebrahimi, P.; Vilcaez, J.

2017-12-01

Hydraulic fracturing wastewater (HFW) containing high concentrations of Ba, is commonly disposed into the deep saline aquifers. We investigate the effect of brine salinity, competing cations (Ca and Mg), and guar gum (most common fracturing viscosifier) on the sorption and transport of Ba through dolomite rocks. To this aim, we have conducted batch sorption and core-flooding experiments at both ambient (22°C) and deep subsurface (60°C) temperature conditions. The effect of mineral composition is assessed by comparing batch and core-flooding experimental results obtained with sandstone and dolomite rocks. Batch sorption experiments conducted using powdered dolomite rocks (500-600 µm particle size) revealed that Ba sorption on dolomite greatly decreases with increasing brine salinity (0 - 180,000 mg-NaCl/L), and that at brine salinities of HFW, chloro-complexation reactions between Ba and Cl ions and changes in pH (that results from dolomite dissolution) are the controlling factors of Ba sorption on dolomite. Organo-complexation reactions between Ba and guar gum, and competition of Ba with common cations (Ca and Mg) for hydration sites of dolomite, play a secondary role. This finding is in accordance with core-flooding experimental results, showing that the transport of Ba through synthetic dolomite rocks of high flow properties (25-29.6% porosity, 9.6-13.7 mD permeability), increases with increasing brine salinity (0-180,000 mg-NaCl/L), while the presence of guar gum (50-500 mg/L) does not affect the transport of Ba. On the other hand, core-flooding experiments conducted using natural dolomite core plugs (6.5-8.6% porosity, 0.06-0.3 mD permeability), indicates that guar gum can clog the pore throats of tight dolomite rocks retarding the transport of Ba. Results of our numerical simulation studies indicate that the mechanism of Ba sorption on dolomite can be represented by a sorption model that accounts for both surface complexation reactions on three distinct

Andre on alati tantsida tahtnud / Anu Mõttus

Index Scriptorium Estoniae

Mõttus, Anu

2009-01-01

Koolitantsu maakonnavoorud on peetud. Igast maakonnast pääsevad piirkonnavooru kuni pooled tantsud. Umbes sama edasipääsuprotsent on ka Andre Laine tantsudel, kelle koolitantsu vaimustus algas Kanepi Gümnaasiumi õpilasena ja kes praeguseks on selle gümnaasiumi tantsupedagoog

Formation of fine crystalline dolomites in lacustrine carbonates of the Eocene Sikou Depression, Bohai Bay Basin, East China

Directory of Open Access Journals (Sweden)

Yong-Qiang Yang

2016-11-01

Full Text Available Abstract The genesis of the fine crystalline dolomites that exhibit good to excellent reservoir properties in the upper fourth member of the Eocene Shahejie Formation (Es 4 s around the Sikou Sag, Bohai Bay Basin, is uncertain. This paper investigates the formation mechanisms of this fine crystalline dolomite using XRD, SEM, thin section analysis and geochemical data. The stratigraphy of the Sikou lacustrine carbonate is dominated by the repetition of metre-scale, high-frequency deposition cycles, and the amount of dolomite within a cycle increases upward from the cycle bottom. These dolomite crystals are 2–30 μm in length, subhedral to anhedral in shape and typically replace both grains and matrix. They also occur as rim cement and have thin lamellae within ooid cortices. Textural relations indicate that the dolomite predates equant sparry calcite cement and coarse calcite cement. The Sr concentrations of dolomites range from 900 to 1200 ppm. Dolomite δ18O values (−11.3 to −8.2 ‰ PDB are depleted relative to calcite mudstone (−8.3 to −5.4 ‰ PDB that precipitated from lake water, while δ13C values (0.06–1.74 ‰ PDB are within the normal range of calcite mudstone values (−2.13 to 1.99 ‰ PDB. High 87Sr/86Sr values (0.710210–0.710844 indicate that amounts of Ca2+ and Mg2+ have been derived from the chemical weathering of Palaeozoic carbonate bedrocks. The high strontium concentration indicates that hypersaline conditions were maintained during the formation of the dolomites and that the dolomites were formed by the replacement of precursor calcite or by direct precipitation.

Magnesium production from Asian Abe-Gram dolomite in pidgeon-type reactor

International Nuclear Information System (INIS)

Mehrabi, B.; Abdellatifi, M.; Masoudi, F.

2011-01-01

Ore mineral characterization and various experimental test work were carried out on Asian Abe-Garm dolomite, Qazvin province, Iran. The test work consisted of calcining, chemical characterization, LOI determination, and reduction tests on the calcined dolomite (doloma), using Semnan ferrosilicon. Calcining of dolomite sample was carried out at about 1400 d egree C in order to remove the contained CO 2 , moisture, and other easily volatilised impurities. The doloma was milled, thoroughly mixed with 21 p ercent S emnan ferrosilicon and briquetted in hand press applying 30 MPa pressure. The briquettes were heated at 1125-1150 d egree C and 500 Pa in a Pidgeon-type tube reactor for 10-12 hours to extract the magnesium. Ferrosilicon addition, relative to doloma, was determined based on the chemical analysis of the two reactants using Mintek's Pyrosim software package. Magnesium extraction calculated as 77.97 p ercent a nd Mg purity of 96.35 p ercent . The level of major impurities in the produced magnesium crown is similar to those in the crude metal production.

Effects of Metal Ions on the Flotation of Apatite, Dolomite and Quartz

Directory of Open Access Journals (Sweden)

Yaoyang Ruan

2018-04-01

Full Text Available The effects of Ca2+, Mg2+, Al3+, and Fe3+ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions on the flotation of these minerals was further elucidated by solution chemistry study, zeta potential measurement, and X-ray photoelectron spectroscopy (XPS analyses. The results indicate that an appropriate amount of Ca2+ and Mg2+ can improve the floatability of apatite but had a negligible effect on the flotation performance of dolomite, whereas Al3+, Fe3+, and excessive amounts of Ca2+ decreased the recovery of apatite and dolomite. The studied metal cations can activate quartz at a particular pH. It can be inferred from solution chemistry and zeta potential measurement that the influence of metal ions on the flotation of different minerals should be attributed to the adsorption of various hydrolysis species on the mineral surfaces. XPS analyses reveal that calcium ions can enhance the adsorption of anionic collector on apatite and quartz surfaces, and there are no apparent changes to be observed on the surface of dolomite in the absence and presence of calcium ions at a concentration of 2.5 × 10−3 M, which was in good agreement with the micro-flotation results.

Using enteric pathogens to assess sources of fecal contamination in the Silurian Dolomite Aquifer: Preliminary results

Science.gov (United States)

Muldoon, Maureen A; Borchardt, Mark A.; Spencer, Susan K.; Hunt, Randall J.; Owens, David

2018-01-01

The fractured Silurian dolomite aquifer is an important, but vulnerable, source of drinking water in northeast Wisconsin (Sherrill in Geology and ground water in Door County, Wisconsin, with emphasis on contamination potential in the Silurian dolomite, 1978; Bradbury and Muldoon in Hydrogeology and groundwater monitoring of fractured dolomite in the Upper Door Priority Watershed, Door County, Wisconsin, 1992; Muldoon and Bradbury in Assessing seasonal variations in recharge and water quality in the Silurian aquifer in areas with thicker soil cover. p 45, 2010). Areas underlain by the Silurian dolomite aquifer are extremely vulnerable to groundwater contamination from various land-use activities, especially the disposal of human wastewater and dairy manure. Currently there is no consensus as to which source of wastewater generates the greater impact to the aquifer.

Intermediate-scale tests of sodium interactions with calcite and dolomite aggregate concretes

International Nuclear Information System (INIS)

Randich, E.; Acton, R.U.

1983-09-01

Two intermediate-scale tests were performed to compare the behavior of calcite and dolomite aggregate concretes when attacked by molten sodium. The tests were performed as part of an interlaboratory comparison between Sandia National Laboratories and Hanford Engineering Development Laboratories. Results of the tests at Sandia National Laboratories are reported here. The results show that both concretes exhibit similar exothermic reactions with molten sodium. The large difference in reaction vigor suggested by thermodynamic considerations of CO 2 release from calcite and dolomite was not realized. Penetration rates of 1.4 to 1.7 mm/min were observed for short periods of time with reaction zone temperatures in excess of 800 0 C during the energetic attack. The penetration was not uniform over the entire sodium-concrete contact area. Rapid attack may be localized due to inhomogeneities in the concrete. The chemical reaction zone is less then one cm thick for the calcite concrete but is about seven cm thick for the dolomite concrete

2623-IJBCS-Article-Gadji Alahou André

African Journals Online (AJOL)

hp

1. Alahou André Gabazé GADJI1,2*, Ossey Bernard YAPO1, Kouabenan ABO2,. Ladji MEITE1, Agnès Eude Yves GNAGNE1, Satinder Kaur BRAR 3 et. Rajeshwar Dayal TYAGI4. 1Laboratoire des Sciences de l'Environnement (LSE), Unité de ...

Pomeranchuk Prize awarded to André Martin

CERN Multimedia

Jordan Juras

2010-01-01

Professor André Martin has been awarded the I.Ya.Pomeranchuk Prize 2010, alongside Professor Valentine Zakharov.   André Martin, CERN theorist, pictured at the ceremony held in honour of his 80th birthday (August 2009). Established by the Institute of Theoretical and Experimental Physics (ITEP) in memory of an outstanding scientist Isaak Yakovlevich Pomeranchuk, the prize is awarded for the study of analytic properties of the scattering amplitude; which lead to the Froissart—Martin bound on the cross section growth with energy. The prize comes as a great honor for Martin, who was in fact a good friend of Mr. Pomeranchuk, "I am surprised and delighted to learn that I will be receiving the 2010 Pomeranchuk Prize. I was an admirer of Pomeranchuk and we shared a great friendship. I met with him for the last time in Erevan (Armenia) in 1965. As a good-bye, he told me, 'Analyticity exists'. This is precisely what I proved to earn the prize"....

Jumalaema kiriku kellamees tuli Tartu Toome varemetesse / Andres Laasik

Index Scriptorium Estoniae

Laasik, Andres, 1960-2016

2007-01-01

13. juulil esietendus Emajõe Suveteatris "Jumalaema kiriku kellamees". Victor Hugo romaani järgi tegi instseneeringu Urmas Lennuk, lavastaja Andres Dvinjaninov. Mängitakse Tartu Toomkiriku varemetes

Mis on looming.org? : elektrooniline heli / Andres Lõo

Index Scriptorium Estoniae

Lõo, Andres

2004-01-01

Võrguajakirjast www.looming.org, kuhu kogutakse infot põhiliselt kahe jaotuse põhjal: muusika ja helieksperimentalism ning kaasaegne kunst, kunsti ja meediaga seonduv. Idee autorid: Hanno Soans ja Andres Lõo. Ilmunud on looming.orgi esimene muusikakogumik "Lilled algebrale"

Amount and nature of occluded water in bedded salt, Palo Duro Basin, Texas

International Nuclear Information System (INIS)

Fisher, R.S.

1987-01-01

The quantity and types of fluids within bedded salt cores from the Permian San Andres Formation, Palo Duro, Texas, were evaluated at the Texas Bureau of Economic Geology. Bedded halite from the San Andres Formation and other salt-bearing units were selected to represent the variety of salt types present, and were then analyzed. The mean water content of ''pure'' samples (more than 90% halite) is 0.4 weight percent, with none observed greater than 1.0 weight percent. Samples that contain more than 10 weight percent clay or mudstone display a trend of increasing water content with increasing clastic material. Chaotic mudstone-halite samples have as much as 5 weight percent water; halite-cemented mudstone interlayers, common throughout the bedded salts, may have water content values as high as 10 to 15 weight percent based on extrapolation of existing data that range from 0 to about 6%. No significant difference exists between the mean water content values of ''pure salt'' from the upper San Andres, lower San Andres Cycle 5, and lower San Andres Cycle 4 salt units. The fraction of total water present as mobile intergranular water is highly variable and not readily predicted from observed properties of the salt sample. The amount of water that would be affected by a high-level nuclear waste repository can be estimated if the volume of halite, the volume of clastic interlayers, and the amount and type of impurity in halite are known. Appendix contains seven vugraphs

EPR, UV-Visible, and Near-Infrared Spectroscopic Characterization of Dolomite

Directory of Open Access Journals (Sweden)

S. Lakshmi Reddy

2008-01-01

Full Text Available Dolomite mineral samples having white and light green colors of Indian origin have been characterized by EPR, optical, and NIR spectroscopy. The optical spectrum exhibits a number of electronic bands due to presence of Fe(III ions in the mineral. From EPR studies, the parameters of g for Fe(III and g,A, and D for Mn(II are evaluated and the data confirm that the ions are in distorted octahedron. Optical absorption studies reveal that Fe(III is in distorted octahedron. The bands in NIR spectra are due to the overtones and combinations of water molecules. Thus EPR and optical absorption spectral studies have proven useful for the study of the solid state chemistry of dolomite.

Insights into the dolomitization process and porosity modification in sucrosic dolostones, Avon Park Formation (Middle Eocene), East-Central Florida, U.S.A.

KAUST Repository

Maliva,, Robert G.

2011-03-01

The Avon Park Formation (middle Eocene) in central Florida, U.S.A., contains shallow-water carbonates that have been replaced by dolomite to varying degrees, ranging from partially replaced limestones, to highly porous sucrosic dolostones, to, less commonly, low-porosity dense dolostones. The relationships between dolomitization and porosity and permeability were studied focusing on three 305-m-long cores taken in the City of Daytona Beach. Stable-isotope data from pure dolostones (mean δ 18O = +3.91% V-PDB) indicate dolomite precipitation in Eocene penesaline pore waters, which would be expected to have been at or above saturation with respect to calcite. Nuclear magnetic log-derived porosity and permeability data indicate that dolomitization did not materially change total porosity values at the bed and formation scale, but did result in a general increase in pore size and an associated substantial increase in permeability compared to limestone precursors. Dolomitization differentially affects the porosity and permeability of carbonate strata on the scale of individual crystals, beds, and formations. At the crystal scale, dolomitization occurs in a volume-for-volume manner in which the space occupied by the former porous calcium carbonate is replaced by a solid dolomite crystal with an associated reduction in porosity. Dolomite crystal precipitation was principally responsible for calcite dissolution both at the actual site of dolomite crystal growth and in the adjoining rock mass. Carbonate is passively scavenged from the formation, which results in no significant porosity change at the formation scale. Moldic pores after allochems formed mainly in beds that experienced high degrees of dolomitization, which demonstrates the intimate association of the dolomitization process with carbonate dissolution. The model of force of crystallization-controlled replacement provides a plausible explanation for key observations concerning the dolomitization process in the

Insights into the dolomitization process and porosity modification in sucrosic dolostones, Avon Park Formation (Middle Eocene), East-Central Florida, U.S.A.

KAUST Repository

Maliva,, Robert G.; Budd, David A.; Clayton, Edward A.; Missimer, Thomas M.; Dickson, John Anthony D

2011-01-01

The Avon Park Formation (middle Eocene) in central Florida, U.S.A., contains shallow-water carbonates that have been replaced by dolomite to varying degrees, ranging from partially replaced limestones, to highly porous sucrosic dolostones, to, less commonly, low-porosity dense dolostones. The relationships between dolomitization and porosity and permeability were studied focusing on three 305-m-long cores taken in the City of Daytona Beach. Stable-isotope data from pure dolostones (mean δ 18O = +3.91% V-PDB) indicate dolomite precipitation in Eocene penesaline pore waters, which would be expected to have been at or above saturation with respect to calcite. Nuclear magnetic log-derived porosity and permeability data indicate that dolomitization did not materially change total porosity values at the bed and formation scale, but did result in a general increase in pore size and an associated substantial increase in permeability compared to limestone precursors. Dolomitization differentially affects the porosity and permeability of carbonate strata on the scale of individual crystals, beds, and formations. At the crystal scale, dolomitization occurs in a volume-for-volume manner in which the space occupied by the former porous calcium carbonate is replaced by a solid dolomite crystal with an associated reduction in porosity. Dolomite crystal precipitation was principally responsible for calcite dissolution both at the actual site of dolomite crystal growth and in the adjoining rock mass. Carbonate is passively scavenged from the formation, which results in no significant porosity change at the formation scale. Moldic pores after allochems formed mainly in beds that experienced high degrees of dolomitization, which demonstrates the intimate association of the dolomitization process with carbonate dissolution. The model of force of crystallization-controlled replacement provides a plausible explanation for key observations concerning the dolomitization process in the

Dolomitization in the diagenetic history of the Štramberg limestones

Czech Academy of Sciences Publication Activity Database

Lintnerová, O.; Knietl, M.; Reháková, D.; Skupien, P.; Vašíček, Zdeněk

2008-01-01

Roč. 34, 3/1 (2008), s. 191-192 ISSN 0138-0974 Institutional research plan: CEZ:AV0Z30860518 Keywords : Štramberk Limestone * dolomitization * dedolomitization Subject RIV: DB - Geology ; Mineralogy

Experimental observation and numerical simulation of permeability changes in dolomite at CO2 sequestration conditions

Science.gov (United States)

Tutolo, B. M.; Luhmann, A. J.; Kong, X.; Saar, M. O.; Seyfried, W. E.

2013-12-01

Injecting surface temperature CO2 into geothermally warm reservoirs for geologic storage or energy production may result in depressed temperature near the injection well and thermal gradients and mass transfer along flow paths leading away from the well. Thermal gradients are particularly important to consider in reservoirs containing carbonate minerals, which are more soluble at lower temperatures, as well as in CO2-based geothermal energy reservoirs where lowering heat exchanger rejection temperatures increases efficiency. Additionally, equilibrating a fluid with cation-donating silicates near a low-temperature injection well and transporting the fluid to higher temperature may enhance the kinetics of mineral precipitation in such a way as to overcome the activation energy required for mineral trapping of CO2. We have investigated this process by subjecting a dolomite core to a 650-hour temperature series experiment in which the fluid was saturated with CO2 at high pressure (110-126 bars) and 21°C. This fluid was recirculated through the dolomite core, increasing permeability from 10-16 to 10-15.2 m2. Subsequently, the core temperature was raised to 50° C, and permeability decreased to 10-16.2 m2 after 289 hours, due to thermally-driven CO2 exsolution. Increasing core temperature to 100°C for the final 145 hours of the experiment caused dolomite to precipitate, which, together with further CO2 exsolution, decreased permeability to 10-16.4 m2. Post-experiment x-ray computed tomography and scanning electron microscope imagery of the dolomite core reveals abundant matrix dissolution and enlargement of flow paths at low temperatures, and subsequent filling-in of the passages at elevated temperature by dolomite. To place this experiment within the broader context of geologic CO2 sequestration, we designed and utilized a reactive transport simulator that enables dynamic calculation of CO2 equilibrium constants and fugacity and activity coefficients by incorporating

Important geosites and parks in the UNESCO World Heritage Site of the Dolomites

International Nuclear Information System (INIS)

Nossing, L.; Forti, S.

2016-01-01

In the geological complexity of the south Tyrol, the Dolomites play a fundamental role, as they are now included in the UNESCO World Heritage (2009) because of their exceptional beauty and unique landscape, together with numerous scientific discoveries. The name of Dolomite comes from the famous mineral dolomite (double calcium magnesium carbonate) discovered by Déodat De Dolomieu in 1789. The dolomitic rocks constitute a large area of the Triassic mountains and many studies have contributed to the discovery of the fundamental stratotypes for the signature of the Permian/Triassic boundary. The steep walls of the Permian volcanic formations and the Sciliar Mountain have always been a great attraction for scientists from all over the world to study the open book of nature in the Dolomites. We will illustrate three sites: 1. The Bula Geotrail. A geological trail through one of the best-preserved sedimentary series in which we can observe one of the most important stratotypes to touch the Permian/Triassic boundary. 2. The Siusi-Alpe di Siusi Geological Trail. This trail starts just above the Permian/Triassic boundary and is characterized by some unique basaltic columnar formations and other significant outcrops of Lower and Medium Triassic. 3. The Bletterbach Geopark. In this sequence the stratotype, which represents the boundary, is a dark coloured continuous layer (organic matter) 5cm thick, and contains some paleobotanical evidence which is unique in the world. The preservation and added value of the natural and geological patrimony of a region through guided and documented trails are at the origin of a new kind of tourism: geotourism. The modern tourist is more and more interested and stimulated by getting to knowing nature in depth. The trails are the best instruments for scientific divulgation and education, allowing a better understanding of the landscape and stimulating new discoveries. (Author)

Important geosites and parks in the UNESCO World Heritage Site of the Dolomites

Energy Technology Data Exchange (ETDEWEB)

Nossing, L.; Forti, S.

2016-10-01

In the geological complexity of the south Tyrol, the Dolomites play a fundamental role, as they are now included in the UNESCO World Heritage (2009) because of their exceptional beauty and unique landscape, together with numerous scientific discoveries. The name of Dolomite comes from the famous mineral dolomite (double calcium magnesium carbonate) discovered by Déodat De Dolomieu in 1789. The dolomitic rocks constitute a large area of the Triassic mountains and many studies have contributed to the discovery of the fundamental stratotypes for the signature of the Permian/Triassic boundary. The steep walls of the Permian volcanic formations and the Sciliar Mountain have always been a great attraction for scientists from all over the world to study the open book of nature in the Dolomites. We will illustrate three sites: 1. The Bula Geotrail. A geological trail through one of the best-preserved sedimentary series in which we can observe one of the most important stratotypes to touch the Permian/Triassic boundary. 2. The Siusi-Alpe di Siusi Geological Trail. This trail starts just above the Permian/Triassic boundary and is characterized by some unique basaltic columnar formations and other significant outcrops of Lower and Medium Triassic. 3. The Bletterbach Geopark. In this sequence the stratotype, which represents the boundary, is a dark coloured continuous layer (organic matter) 5cm thick, and contains some paleobotanical evidence which is unique in the world. The preservation and added value of the natural and geological patrimony of a region through guided and documented trails are at the origin of a new kind of tourism: geotourism. The modern tourist is more and more interested and stimulated by getting to knowing nature in depth. The trails are the best instruments for scientific divulgation and education, allowing a better understanding of the landscape and stimulating new discoveries. (Author)

Peaosa nii teatrilaval kui ka kinolinal / Andres Laasik

Index Scriptorium Estoniae

Laasik, Andres, 1960-2016

2010-01-01

Natalja Murina-Puustusmaast, kes mängib peaosa Vene Teatri uuslavastuses "Besame mucho", mille Afolf Käis on lavastanud Eduardo de Filippo näidendi "Silinder" järgi, ja Andres Puustusmaa filmis "Rotilõks", mille võtted algavad peagi

Paleoenvironmental and paleohydrochemical conditions of dolomite formation within a saline wetland in arid northwest Australia

Science.gov (United States)

Mather, Caroline C.; Skrzypek, Grzegorz; Dogramaci, Shawan; Grierson, Pauline F.

2018-04-01

Groundwater dolocrete occurring within the Fortescue Marsh, a large inland wetland in the Pilbara region of northwest Australia, has been investigated to provide paleoenvironmental and paleohydrological records and further the understanding of low temperature dolomite formation in terrestrial settings over the Quaternary Period. Two major phases of groundwater dolocrete formation are apparent from the presence of two distinct units of dolocrete, based on differences in depth, δ18O values and mineral composition. Group 1 (G1) occurs at depth 20-65 m b.g.l. (below ground level) and contains stoichiometric dolomite with δ18O values of -4.02-0.71‰. Group 2 (G2) is shallower (0-23 m b.g.l.), occurring close to the current groundwater level, and contains Ca-rich dolomite ± secondary calcite with a comparatively lower range of δ18O values (-7.74 and -6.03‰). Modelled δ18O values of paleogroundwater from which older G1 dolomite precipitated indicated highly saline source water, which had similar stable oxygen isotope compositions to relatively old brine groundwater within the Marsh, developed under a different hydroclimatic regime. The higher δ18O values suggest highly evaporitic conditions occurred at the Marsh, which may have been a playa lake to saline mud flat environment. In contrast, G2 dolomite precipitated from comparatively fresher water, and modelled δ18O values suggested formation from mixing between inflowing fresher groundwater with saline-brine groundwater within the Marsh. The δ18O values of the calcite indicates formation from brackish to saline groundwater, which suggests this process may be associated with coeval gypsum dissolution. In contrast to the modern hydrology of the Marsh, which is surface water dependent and driven by a flood and drought regime, past conditions conducive to dolomite precipitation suggest a groundwater dependent system, where shallow groundwaters were influenced by intensive evaporation.

Early diagenetic dolomitization and dedolomitization of Late Jurassic and earliest Cretaceous platform carbonates: A case study from the Jura Mountains (NW Switzerland, E France)

Science.gov (United States)

Rameil, Niels

2008-12-01

Early diagenetic dolomitization is a common feature in cyclic shallow-water carbonates throughout the geologic record. After their generation, dolomites may be subject to dedolomitization (re-calcification of dolomites), e.g. by contact with meteoric water during emersion. These patterns of dolomitization and subsequent dedolomitization frequently play a key role in unravelling the development and history of a carbonate platform. On the basis of excellent outcrops, detailed logging and sampling and integrating sedimentological work, high-resolution sequence stratigraphic interpretations, and isotope analyses (O, C), conceptual models on early diagenetic dolomitization and dedolomitization and their underlying mechanisms were developed for the Upper Jurassic / Lower Cretaceous Jura platform in north-western Switzerland and eastern France. Three different types of early diagenetic dolomites and two types of dedolomites were observed. Each is defined by a distinct petrographic/isotopic signature and a distinct spatial distribution pattern. Different types of dolomites are interpreted to have been formed by different mechanisms, such as shallow seepage reflux, evaporation on tidal flats, and microbially mediated selective dolomitization of burrows. Depending on the type of dolomite, sea water with normal marine to slightly enhanced salinities is proposed as dolomitizing fluid. Based on the data obtained, the main volume of dolomite was precipitated by a reflux mechanism that was switched on and off by high-frequency sea-level changes. It appears, however, that more than one dolomitization mechanism was active (pene)contemporaneously or several processes alternated in time. During early diagenesis, percolating meteoric waters obviously played an important role in the dedolomitization of carbonate rocks that underlie exposure surfaces. Cyclostratigraphic interpretation of the sedimentary succession allows for estimates on the timing of early diagenetic (de)dolomitization

Model study of initial adsorption of SO{sub 2} on calcite and dolomite

Energy Technology Data Exchange (ETDEWEB)

Malaga-Starzec, Katarina; Panas, Itai; Lindqvist, Oliver

2004-01-30

The rate of calcareous stone degradation is to a significant extent controlled by their surface chemistry with SO{sub 2}. Initial surface sulphite is converted to a harmful gypsum upon, e.g. NO{sub 2} catalysed oxidation. However, it has been observed by scanning electron microscopy that the lateral distributions of gypsum crystals differ between calcitic and dolomitic marbles. The first-principles density functional theory is employed to understand the origin of these fundamentally different morphologies. Here, the stability differences of surface sulphite at calcite CaCO{sub 3} (s) and dolomite Ca{sub x}Mg{sub 1-x}CO{sub 3} (s) are determined. A qualitative difference in surface sulphite stability, favouring the former, is reported. This is taken to imply that calcitic micro-crystals embedded in a dolomitic matrix act as sinks in the surface sulphation process, controlled by SO{sub 2} diffusion. The subsequent formation of gypsum under such conditions will not require SO{sub 4}{sup 2-} (aq) ion transport. This explains the homogeneous distribution of gypsum observed on the calcitic micro-crystals in dolomite. In contrast, sulphation on purely calcitic marbles never reaches such high SO{sub 2} coverage. Rather, upon oxidation, SO{sub 4}{sup 2-} (aq) transport to nucleation centres, such as grain boundaries, is required for the growth of gypsum crystals.

Kino, Theater, Fernsehen : André Bazins Publikumstheorie

NARCIS (Netherlands)

Hanich, Julian; Mundhenke, Florian; Weber, Thomas

2017-01-01

What did the great French film theorist André Bazin think of the collective experience in the cinema? What did he write about the influence co-viewers can have on the emotional engagement, the evaluation and the interpretation of a film? In short: What was his audience theory? To be sure, Bazin is

Eesti fond rahastab Vene infotehnoloogiat / Andres Reimer

Index Scriptorium Estoniae

Reimer, Andres

2006-01-01

Martinson Trigon Venture Partners (MTVP) loob uue tarkvarainvesteeringute fondi, mis viib endise NSVL-i alale kuni 780 miljonit krooni, fond võtab sihiks kümmekond uut ettevõtet. MTVP esimese fondi investeeringutest. Fondide juhi Andres Susi selgitusi. Lisa: Martinson Trigon Venture Partners osalusega firmad; Vt. samas: Moskvas pole raha ja geeniused kohtunud

Contabilidad y cobros de rentas en la Santa Capilla de San Andrés de Jaén. Dos siglos y medio tras la búsqueda de la eficiencia (1650-1900

Directory of Open Access Journals (Sweden)

Juan Luis Lillo Criado

2006-07-01

Full Text Available La Santa Capilla de San Andrés de Jaén es una institución benéfica que tiene sus orígenes en 1515 y aún pervive. Su contabilidad, establecida para la rendición de cuentas por parte del receptor, se sustentó en el método de cargo y data y en diversos libros necesarios, tales como los de hacienda, de gastos de meses o el cuaderno de no cobrados. En este trabajo, sobre la base del análisis de la enorme cantidad de datos que suministran sus cuentas entre 1650 y 1900, hemos estudiado la función de cobro de rentas del receptor y la eficiencia en el desempeño de la misma, así como la legitimación conseguida por los principales promotores de cambios en orden a su mejora. Para ello hemos incidido especialmente en los sistemas de remuneración al receptor y, en particular, en el cambio producido desde un escenario de empleo a sueldo fijo a otro de comisionista con retribución variable. Después de investigar los impagados con un sistema y otro y de relacionarlos con la evolución de las propiedades y de sus rentas, se concluye que el cambio benefició a los receptores pero no a la institución, por lo que no mejoró la eficiencia buscada.

Innovació docent: gestió i desenvolupament d’activitats extracurriculars en l’àrea de la conservació-restauració de pintura mural. Capella de San Andrés (Sevilla-Espanya

Directory of Open Access Journals (Sweden)

Beatriz Prado-Campos

2017-03-01

Full Text Available INTRODUCCIÓ. Aquest article descriu una experiència pràctica d’innovació docent duta a terme en el grau universitari de Conservació i Restauració de Béns Culturals de la Universitat de Sevilla. MÈTODE. Les pràctiques acadèmiques descrites tenien com a objectiu fonamental contribuir activament a la formació dels alumnes i aportar-los una experiència pràctica professional real en traslladar-los del seu àmbit habitual, l’aula, a un entorn professional. RESULTATS. L’aplicació de la metodologia específica de conservació-restauració en projectes d’intervenció de pintura mural, concretament a la cúpula de l’església de San Andrés (Sevilla, va permetre que l’alumnat prengués contacte amb una realitat professional concreta, on el gran format de les pintures murals i l’aplicació de les mesures de seguretat laboral van tenir com a resultat la millora les seves destreses i habilitats pel que fa als processos propis de la seva professió. A més, va suposar una experiència d’interès per a la seva inserció laboral. DISCUSSIÓ. Es demostra, amb això, que utilitzant els recursos didàctics apropiats en el procés d’ensenyament i aprenentatge es pot ampliar la qualitat de la docència.

Major salt beds of the Palo Duro and Dalhart Basins, Texas

International Nuclear Information System (INIS)

1983-12-01

Major salt beds are defined as salt intervals at least 75 feet thick that contain no interbeds greater than 10 feet thick and include no more than 15 percent non-salt interbeds. Maps based on the interpretation of geophysical logs from hundreds of oil and gas exploration wells reveal seven major salt beds in the Palo Duro Basin and one major salt bed in the Dalhart Basin. The most extensive major salt beds are in the central and northern Palo Duro Basin, in the Upper San Andres Formation and the Lower San Andres Formation Units 4 and 5. Of these, the major salt bed within the Lower San Andres Formation Unit 4 is the most widespread and generally the thickest. 7 references, 15 figures, 2 tables

Relacíon de graficas, mapas y cuadros

OpenAIRE

Piel, Jean

2013-01-01

Graficas Pág. Variaciones del precio de la fanega de maíz y de cacao en la Real Almoneda de Guatemala en relación con la existencia de los jueces de milpas 192 Estructura de parentesco 249 La población indígena de San Andrés Sajcabajá de 1730 a 1820 278 Evolución demográfica de San Andrés entre 1921 y 1967 386 Evolución del poblamiento en Canilla de 1921 a 1967 388 Mapas La expansión de la federación quiché antes de 1524 28 La región de San Andrés Sajcabajá vista por Cortés y Larraz en 1768 2...

Muddy and dolomitic rip-up clasts in Triassic fluvial sandstones: Origin and impact on potential reservoir properties (Argana Basin, Morocco)

Science.gov (United States)

Henares, Saturnina; Arribas, Jose; Cultrone, Giuseppe; Viseras, Cesar

2016-06-01

The significance of rip-up clasts as sandstone framework grains is frequently neglected in the literature being considered as accessory components in bulk sandstone composition. However, this study highlights the great value of muddy and dolomitic rip-up clast occurrence as: (a) information source about low preservation potential from floodplain deposits and (b) key element controlling host sandstone diagenetic evolution and thus ultimate reservoir quality. High-resolution petrographic analysis on Triassic fluvial sandstones from Argana Basin (T6 and T7/T8 units) highlights the significance of different types of rip-up clasts as intrabasinal framework components of continental sediments from arid climates. On the basis of their composition and ductility, three main types are distinguished: (a) muddy rip-up clasts, (b) dolomitic muddy rip-up clasts and (c) dolomite crystalline rip-up clasts. Spatial distribution of different types is strongly facies-related according to grain size. Origin of rip-up clasts is related to erosion of coeval phreatic dolocretes, in different development stages, and associated muddy floodplain sediments. Cloudy cores with abundant inclusions and clear outer rims of dolomite crystals suggest a first replacive and a subsequent displacive growth, respectively. Dolomite crystals are almost stoichiometric. This composition is very similar to that of early sandstone dolomite cement, supporting phreatic dolocretes as dolomite origin in both situations. Sandstone diagenesis is dominated by mechanical compaction and dolomite cementation. A direct correlation exists between: (1) muddy rip-up clast abundance and early reduction of primary porosity by compaction with irreversible loss of intergranular volume (IGV); and (2) occurrence of dolomitic rip-up clasts and dolomite cement nucleation in host sandstone, occluding adjacent pores but preserving IGV. Both processes affect reservoir quality by generation of vertical and 3D fluid flow baffles and

Mis siis juhtus Andres Lapeteusega? / Õie Orav

Index Scriptorium Estoniae

Orav, Õie

2011-01-01

Režissöör Grigori Kromanovi filmist "Mis juhtus Andres Lapeteusega?" (Tallinnfilm, 1965). Osades: Einari Koppel, Ita Ever, Heino Mandri, Kaljo Kiisk, Uno Loit, Ada Lundver jt. Lühidalt filmi kohta ilmunud arvustustest. Filmi näeb ETV2-s sarjas "Unustatud filmid"

ECOLOGÍA DE CAIMAN CROCODILUS FUSCUS EN SAN ANDRÉS ISLA, COLOMBIA: UN ESTUDIO PRELIMINAR

Directory of Open Access Journals (Sweden)

FORERO-MEDINA GERMÁN

2006-06-01

Full Text Available La isla de San Andrés, en el Caribe colombiano, es una reserva de la biosfera yuna región de gran importancia biológica y cultural. Su fauna y su flora cuentan,sin embargo, con algunas especies consideradas como introducciones recientes yvoluntarias, que no han sido estudiadas y cuyos efectos deben ser evaluados conprontitud. Las babillas, Caiman crocodilus fuscus (Cope 1868, fueron introducidasa la isla en los años setenta y no se había realizado ningún trabajo previo sobre suecología en la región. En este trabajo se ubicaron las diferentes localidades dondeC. c. fuscus está presente durante la época seca en San Andrés, se estimaron losíndices de abundancia por localidad por medio de censos nocturnos, y se realizó unestudio de su dieta usando la metodología de extracción de contenidos estomacales.También se observó la relación de la comunidad isleña con la especie. El estudiose realizó durante los meses de marzo a junio del 2002, en la temporada seca.La especie fue encontrada en cuatro lagunas de agua dulce permanentes, conabundancias locales de 8, 17, 34 y 22 individuos, y no fue encontrado ninguno en losmanglares. Se capturaron veinte individuos y sus contenidos estomacales mostraronque consumen coleópteros, ortópteros, otros insectos, miriápodos, cangrejos, pecesy aves. El elemento que apareció con mayor frecuencia fue el coleóptero del géneroHydrophilus. Las babillas son utilizadas por la comunidad con fines turísticos y nose observó una explotación o extracción de animales.

Presence of sulfate does not inhibit low-temperature dolomite precipitation

NARCIS (Netherlands)

Sánchez-Román, Mónica; McKenzie, Judith A.; de Luca Rebello Wagener, Angela; Rivadeneyra, Maria A.; Vasconcelos, Crisógono

2009-01-01

The hypothesis that sulfate inhibits dolomite formation evolved from geochemical studies of porewaters from deep-sea sedimentary sequences and has been tested with hydrothermal experiments. We examined the sulfate inhibition factor using aerobic culture experiments with Virgibacillus marismortui and

Pedagogic Juan Andrés Cué Bada's work (1935-1979

Directory of Open Access Journals (Sweden)

Janet Reinaldo-Delgado

2017-06-01

Full Text Available Juan Andrés Cué Bada was born on November 30, 1908 in the province of Las Tunas. He had an active political participation against Machado and Batista, while he dedicated himself to private education. After the triumph of the Cuban Revolution in 1959 he moved to Santiago de Cuba and in 1962 began his professorial course at the Universidad de Oriente until he died in 1979. Because of the lack of knowledge about his figure and his work as a teacher, this article Intends to explain the pedagogical work of Juan Andrés Cué Bada between the years 1935 and 1979.

Kutseharidust hakkab muutma uus paradigma / André Huigens ; intervjueerinud Veiko Belials

Index Scriptorium Estoniae

Huigens, André

2011-01-01

Intervjuu Luual toimunud rahvusvahelise kutsehariduse alase seminari peaesineja, André Huigensiga, kes on Euroopa kutseõppe arenduskeskuse Cedefop kvalifikatsiooniraamistiku ekspert Hollandi Wellantcollege’ist

Andrés Chiautla, Estado de México

Directory of Open Access Journals (Sweden)

J. Tiburcio-Rosales

2007-01-01

Full Text Available En el presente trabajo se realizó un Ordenamiento Ecológico Territorial del municipio de San Andrés Chiautla. La metodología empleada fue la propuesta por el INE-SEMARNAP, la cual emplea la variante de los sistemas complejos asociados a la metodología de SEDUE, utilizando las variantes del Levantamiento Fisiográfico realizado a través del SIG para la caracterización de los subsistemas natural y socioeconómico; así como la utilización de los términos de referencia para las transformaciones y permanencias del uso del suelo obtenidos del Programa Estatal de Ordenamiento Territorial elaborado por SEDESOL. Se generaron ocho productos como resultado de la etapa de caracterización del subsistema natural y socioeconómico los cuales son: la calidad ecológica de los recursos naturales, la fragilidad natural, los cambios del uso del suelo y vegetación, la presión de la población sobre su entorno natural, la distribución de la población, los niveles de bienestar de la población, la dinámica espacial y temporal de la población y los aspectos socioeconómicos. Después de la etapa de caracterización se llevó a cabo la integración del subsistema natural para obtener la estabilidad ambiental y las políticas ambientales. Como resultado final se obtuvieron las tablas de uso, políticas y criterios para normalizar la utilización del espacio territorial.

SURVEY OF BENTHIC DINOFLAGELLATES ASSOCIATED TO BEDS OF Thalassia testudinum IN SAN ANDRÉS ISLAND, SEAFLOWER BIOSPHERE RESERVE, CARIBBEAN COLOMBIA

Directory of Open Access Journals (Sweden)

Brigitte Gavio

2010-05-01

Full Text Available In order to determine the occurrence of epiphytic toxic dinoflagellates in the coastal waters of San Andrés Island, Caribbean Colombia, we analyzed the seagrass beds on the northern and eastern sides of the island. We found seven species of toxicogenic dinoflagellates, belonging to the genera Prorocentrum and Ostreopsis. The cell densities were generally low if compared with previous studies in other Caribbean sites, ranging from 0 to 836 cells/dry weight. The species encountered are known to produce toxins causing the Diarrehic Shellfish Poisoning and Ciguatera, poisonings which have been documented in the island.

André-Philip Lemke näitus Tallinnas / Mari Laaniste

Index Scriptorium Estoniae

Laaniste, Mari, 1977-

1998-01-01

Saksa kunstniku André-Philip Lemke (1970) näitus "Üks-üks armsa Jumala kasuks" 17. augustist Saksa Kultuuriinstituudis. Tööd on valgele paberile tavalise sinise pastapliiatsiga kirjutatud-joonistatud

André François Boshoff (1945-2016)

African Journals Online (AJOL)

Campbell Murn

National Herbarium in Pretoria and at Stellenbosch. In 1974 André was awarded a. BSc (honours) postgraduate degree in Wildlife Management at the. University of Pretoria (Eugène. Marais. Chair of. Wildlife. Management). It was during this period that he developed a greater interest in birds, especially in their conservation ...

Haapsalu Gümnaasiumi võimla = Haapsalu Gymnasium Gym / Andres Alver

Index Scriptorium Estoniae

Alver, Andres, 1953-

2001-01-01

Projekteerija: Alver Trummal Arhitektid OÜ. Arhitektid Andres Alver, Sven Koppel, Tarmo Laht, Ulla Mets. Projekt 1998-1999, hoone valmis 2001. 11 ill.: asendi- ja korruse plaan, pikilõige, välis- ja sisevaated

Kommest Auto ostmisest huvitub ka Hillar Teder / Andres Eilart

Index Scriptorium Estoniae

Eilart, Andres

2008-01-01

Kommest Auto ostmise vastu tunnevad huvi suurärimees Andres Sarri, Rootsis Peugeot' sõidukeid müüv Taani päritolu K. W. Bruun Import ja multimiljonär Hillar Teder, kellele kuulub Audisid müüv Reval Auto

Europan 7 Eestis : Lasnamäe. Pärnu / Tiit Trummal, Andres Kurg

Index Scriptorium Estoniae

Trummal, Tiit, 1954-

2004-01-01

Võistluse "Äärelinna võimalus, linnalik intensiivsus ja elamise mitmekesisus" Eesti-Rootsi ühisžüriis Eestist Urmas Muru, Tiit Trummal, Andres Kurg. Tallinna Lasnamäe (14 tööd) ja Pärnu (47 tööd) võistlusalast, võitnud tööde arhitektide loetelu ja võitnud töödest. Lasnamäe: I preemia - autor hispaanlane Andres Fernandes Atela, kaasautorid prantslased Mathieu Andrieu ja Iman Morshedi. Pärnu: I preemia - autorid rumeenlane Oana-Maria Bogdan, ameeriklane Susan Kelly Shannon, argentiinlane Laura Vescina, hispaanlased Juny Llach ja Parra Colacios

Evaluation of dolomitic resources of Uruguay (Minas - Pan de Azucar Region)

International Nuclear Information System (INIS)

Arrighetti, R; Pirelli, H.; Gianotti, V.; humberto.pirelli@dinamige.miem.gub.uy

2007-01-01

This investigation tries - through Phase I and Phase II stages - to get and estimation of the volume of dolomite resources by means of prospecting the region between the city of Minas and the Pan de Azucar hill, Uruguay; with the objective of achieve a reactivation of this area, increasing job offer, commerce, industrial production and construction activities. Phase I is intended to add valuable information about the precise location of calcareous bodies, their basic features, its geochemical characterization and definition of bodies to be studied with higher detail in Phase II. This second stage points to get an evaluation of the Inferred Resources using 1:10 000 maps and lithological sampling networks to obtain a geochemical characterization of the rocky bodies and the core samples extracted by drilling.Keywords: dolomite, exploration, evaluation, Uruguay. (author)

Reconstruction of the pre-compactional thickness of the Zechstein Main Dolomite in northwest Poland

Directory of Open Access Journals (Sweden)

Semyrka Grażyna

2015-12-01

Full Text Available Our reconstruction of the pre-compactional thickness of the Main Dolomite strata from the so-called Grotów Peninsula (northwest Poland was based on macroscopic observations of drill cores from three wells: Mokrzec-1, Sieraków-4 and Międzychód-5. These wells are located in various palaeogeographical zones of the Main Dolomite and cored rocks represent a range of microfacies. The amount of compactional reduction in thickness of the Main Dolomite was estimated by summing the total heights (Wst of all stylolites encountered in logs of these wells. For calculations, a generalised model of a drill core was developed, which embraced all types of stylolite seams present in the Main Dolomite succession studied. Also the method of stylolite dimensioning was demonstrated. The number of stylolites in the drill cores studied varied from 511 in the Sieraków-4 well to 1,534 in the Międzychód-5 well. In all cores studied low-amplitude macrostylolites predominated, but the reduction of thickness was controlled mostly by the low- and medium-amplitude macrostylolites. The largest number of stylolites was found in the grainstone/packstone microfacies. The turnout of stylolites depends of microfacies. The highest density of stylolites was documented in mudstones/wackestones (24 stylolites per metre of rock thickness and the lowest in boundstones (14 stylolites per metre of rock thickness. The low-amplitude stylolites appear most frequently in the mudstone/wackestone microfacies (15 stylolites per metre of rock thickness; in grainstones/packstones, rudstones/floatstones and boundstones middle-amplitude stylolites are rare (3 stylolites per metre of rock thickness. The degree of compaction of the Main Dolomite succession studied varied from 6 to 10%; hence, its calculated initial thickness also varied in the wells studied: from 41.3 m in the Sieraków-4 well to 56.9 m in the Mokrzec-1 well and to 97.1 m in the Międzychód-5 well. The volumes of reservoir

Resetting of Mg isotopes between calcite and dolomite during burial metamorphism: Outlook of Mg isotopes as geothermometer and seawater proxy

Science.gov (United States)

Hu, Zhongya; Hu, Wenxuan; Wang, Xiaomin; Lu, Yizhou; Wang, Lichao; Liao, Zhiwei; Li, Weiqiang

2017-07-01

Magnesium isotopes are an emerging tool to study the geological processes recorded in carbonates. Calcite, due to its ubiquitous occurrence and the large Mg isotope fractionation associated with the mineral, has attracted great interests in applications of Mg isotope geochemistry. However, the fidelity of Mg isotopes in geological records of carbonate minerals (e.g., calcite and dolomite) against burial metamorphism remains poorly constrained. Here we report our investigation on the Mg isotope systematics of a dolomitized Middle Triassic Geshan carbonate section in eastern China. Magnesium isotope analysis was complemented by analyses of Sr-C-O isotopic compositions, major and trace element concentrations, and petrographic and mineralogical features. Multiple lines of evidence consistently indicated that post-depositional diagenesis of carbonate minerals occurred to the carbonate rocks. Magnesium isotope compositions of the carbonate rocks closely follow a mixing trend between a high δ26Mg dolomite end member and a low δ26Mg calcite end member, irrespective of sample positions in the section and calcite/dolomite ratio in the samples. By fitting the measured Mg isotope data using a two-end member mixing model, an inter-mineral Δ26Mgdolomite-calcite fractionation of 0.72‰ was obtained. Based on the experimentally derived Mg isotope fractionation factors for dolomite and calcite, a temperature of 150-190 °C was calculated to correspond to the 0.72‰ Δ26Mgdolomite-calcite fractionation. Such temperature range matches with the burial-thermal history of the local strata, making a successful case of Mg isotope geothermometry. Our results indicate that both calcite and dolomite had been re-equilibrated during burial metamorphism, and based on isotope mass balance of Mg, the system was buffered by dolomite in the section. Therefore, burial metamorphism may reset Mg isotope signature of calcite, and Mg isotope compositions in calcite should be dealt with caution in

Andres Puustusmaa - mees nagu jalgratas ehk Seitseteist kevadist hetke enne Moskva rongi väljumist / Andres Puustusmaa ; interv. Margus Mikomägi

Index Scriptorium Estoniae

Puustusmaa, Andres

2008-01-01

Venemaal tegutseva Eestist pärit režissööri Andres Puustusmaa mängufilm "18-14" esilinastub 10. jaanuaril Eestis. Lisaks tõlge filmi tutvustavast tekstist (www.1814.ru) : "Tsarskoje Selo Kõrilõikaja ja lütseumi kasvandikud". Artikkel rubriigis "Teatriküljed 1/25"

André Lefevere and his Manipulation School

OpenAIRE

Šmrha, Jan

2015-01-01

This theoretical and historiographical thesis examines the theoretical work of the Translation Studies scholar André Lefevere. It focuses primarily on the analysis of Lefevere's work in the context of the development of Translation Studies (particularly in connection with the development of Descriptive Translation Studies, the formation of the "Manipulation School" and the cultural and sociological turns in Translation Studies). The thesis covers Lefevere's theoretical underpinnings, the grad...

Eesti Energia esindused = Eesti Energia branches / Andres Labi, Janno Roos

Index Scriptorium Estoniae

Labi, Andres, 1977-

2013-01-01

Eesti Energia klienditeeninduse kontorite sisekujundusest. Autorid: Janno Roos, Andres Labi ja Liisa Põime (Ruumilabor). Visuaalne identiteet: Tank.Teenuste disain: Urmas Pastarus. ESLi aastapreemiate žürii esimehe Kaido Kivi ning žürii liikme Raivo Puusepa arvamused

Shedding Light on the Sea: André Morel's Legacy to Optical Oceanography

Science.gov (United States)

Antoine, David; Babin, Marcel; Berthon, Jean-François; Bricaud, Annick; Gentili, Bernard; Loisel, Hubert; Maritorena, Stéphane; Stramski, Dariusz

2014-01-01

André Morel (1933-2012) was a prominent pioneer of modern optical oceanography, enabling significant advances in this field. Through his forward thinking and research over more than 40 years, he made key contributions that this field needed to grow and to reach its current status. This article first summarizes his career and then successively covers different aspects of optical oceanography where he made significant contributions, from fundamental work on optical properties of water and particles to global oceanographic applications using satellite ocean color observations. At the end, we share our views on André's legacy to our research field and scientific community.

Subsurface example of a dolomitized middle Guadalupian (Permian) reef from west Texas

Energy Technology Data Exchange (ETDEWEB)

Longacre, S.A.

1983-01-01

A middle Guadalupian organic buildup was cored in the North McElroy Unit (NMU No. 3713 well) in Upton County, W. Texas. Fusulinid control indicates the buildup is equivalent to the Goat Seep reef that crops out in the Guadalupe Mt. The organic buildup at North McElroy consists of boundstones and associated flank grainstones. The reef biota is dominated by ramose and encrusting bryozoans, numerous types of calcareous sponges, the problematic encrusting organism Tubiphytes, encrusting algae, crinoids, brachiopods, and trilobites. Among the more significant aspects of diagenesis are mechanical degradation and biologic degradation, leaching, gypsum-anhydrite transformations, cementation, replacement of all calcite by dolomite, cementation and replacement by baroque dolomite, fracturing, and replacement of carbonate by anhydrite. 17 references.

Perekonnad hoiavad kontrolli tuntud suurfirmade tegevuse üle / Andres Reimer

Index Scriptorium Estoniae

Reimer, Andres

2005-01-01

Andres Haamer räägib oma perefirma Overall Eesti loomisest. Uniprindi-Unipressi omanikud Sirje ja Andrus Reinsoo hindavad koos oma äri peatrumpideks täielikku usaldust ja teineteisemõistmist. Lisad: Maailma legend: Rockefellerid; Eesti legend: Puhkid

Common Ion Effects In Zeoponic Substrates: Dissolution And Cation Exchange Variations Due to Additions of Calcite, Dolomite and Wollastonite

Science.gov (United States)

Beiersdorfer, R. E.; Ming, D. W.; Galindo, C., Jr.

2003-01-01

c1inoptilolite-rich tuff-hydroxyapatite mixture (zeoponic substrate) has the potential to serve as a synthetic soil-additive for plant growth. Essential plant macro-nutrients such as calcium, phosphorous, magnesium, ammonium and potassium are released into solution via dissolution of the hydroxyapatite and cation exchange on zeolite charged sites. Plant growth experiments resulting in low yield for wheat have been attributed to a Ca deficiency caused by a high degree of cation exchange by the zeolite. Batch-equilibration experiments were performed in order to determine if the Ca deficiency can be remedied by the addition of a second Ca-bearing, soluble, mineral such as calcite, dolomite or wollastonite. Variations in the amount of calcite, dolomite or wollastonite resulted in systematic changes in the concentrations of Ca and P. The addition of calcite, dolomite or wollastonite to the zeoponic substrate resulted in an exponential decrease in the phosphorous concentration in solution. The exponential rate of decay was greatest for calcite (5.60 wt. % -I), intermediate for wollastonite (2.85 wt.% -I) and least for dolomite (1.58 wt.% -I). Additions of the three minerals resulted in linear increases in the calcium concentration in solution. The rate of increase was greatest for calcite (3.64), intermediate for wollastonite (2.41) and least for dolomite (0.61). The observed changes in P and Ca concentration are consistent with the solubilities of calcite, dolomite and wollastonite and with changes expected from a common ion effect with Ca. Keywords: zeolite, zeoponics, common-ion effect, clinoptilolite, hydroxyapatite

Experimental observation of permeability changes in dolomite at CO2 sequestration conditions.

Science.gov (United States)

Tutolo, Benjamin M; Luhmann, Andrew J; Kong, Xiang-Zhao; Saar, Martin O; Seyfried, William E

2014-02-18

Injection of cool CO2 into geothermally warm carbonate reservoirs for storage or geothermal energy production may lower near-well temperature and lead to mass transfer along flow paths leading away from the well. To investigate this process, a dolomite core was subjected to a 650 h, high pressure, CO2 saturated, flow-through experiment. Permeability increased from 10(-15.9) to 10(-15.2) m(2) over the initial 216 h at 21 °C, decreased to 10(-16.2) m(2) over 289 h at 50 °C, largely due to thermally driven CO2 exsolution, and reached a final value of 10(-16.4) m(2) after 145 h at 100 °C due to continued exsolution and the onset of dolomite precipitation. Theoretical calculations show that CO2 exsolution results in a maximum pore space CO2 saturation of 0.5, and steady state relative permeabilities of CO2 and water on the order of 0.0065 and 0.1, respectively. Post-experiment imagery reveals matrix dissolution at low temperatures, and subsequent filling-in of flow passages at elevated temperature. Geochemical calculations indicate that reservoir fluids subjected to a thermal gradient may exsolve and precipitate up to 200 cm(3) CO2 and 1.5 cm(3) dolomite per kg of water, respectively, resulting in substantial porosity and permeability redistribution.

Simple, simultaneous gravimetric determination of calcite and dolomite in calcareous soils

Science.gov (United States)

Literature pertaining to determination of calcite and dolomite is not modern and describes slow methods that require expensive specialized apparatus. The objective of this paper was to describe a new method that requires no specialized equipment. Linear regressions and correlation coefficients for...

Raio Piiroja : mängijatest ei suudetud maksimumi pigistada / Andres Kalvik

Index Scriptorium Estoniae

Kalvik, Andres, 1982-

2007-01-01

Vt. ka Postimees : na russkom jazõke 19. nov., lk. 13. Eesti koondis võlgneb EM-valikturniiri viimase kohtumise 2:0 Andorra üle suuresti Andres Operile. Kommenteerib Andorra koondise peatreener David Rodrigo

[Rets. rmt. : Glucksmann, Andre. Ouest contre Ouest. Pariis, 2003] / Malle Talvet

Index Scriptorium Estoniae

Talvet, Malle

2004-01-01

Prantsuse filosoofi Andre Glucksmanni raamat "Ouest contre Ouest" ehk "Lääs Lääne vastu" käsitleb rahvusvahelisi sündmusi 2002/2003, eelkõige Iraaki, terrorismi, Ameerika Ühendriike ja Prantsusmaad

Põlvas tuli esitusele Andre Laine 29 tantsu / Mati Määrits

Index Scriptorium Estoniae

Määrits, Mati, 1958-

2008-01-01

Põlva Kultuuri- ja Huvikeskuses sai näha Põlvamaa Koolitantsu maakondlikku eelvooru. 52st tantsust 29 tantsu autor on Andre Laine. Kommenteerib ka Tartu Ülikooli Viljandi Kultuuriakadeemia lavakunstide osakonna tantsukunsti õppejõud Kai Valtna

Sobre "La tortuga" de Andrés Holguin

Directory of Open Access Journals (Sweden)

José Puben

1961-04-01

Full Text Available Andrés Holguín no es el primero y, ciertamente, no será el último escritor contemporáneo que, interesado por el problema de los animales que han logrado dimensión fantástica, se proponga, con interés intelectual, analizar e investigar la dimensión e importancia de un animal en la historia de la cultura.

Eestlane juhib Ukrainas EBRD investeeringuid / Andre Küüsvek ; interv. Henrik Ilves

Index Scriptorium Estoniae

Küüsvek, Andre

2008-01-01

Seni Euroopa Rekonstruktsiooni- ja Arengupanga (EBRD) Kasahstani osakonda juhtinud Andre Küüsvek valiti juhtima EBRD investeeringuid Ukrainas. Tänavu on plaanis investeerida Ukrainas 1,5 mld. dollarit

Origin of dolomites in a downslope biostrome, Jefferson Formation (Frasnian), central Idaho: evidence from REE patterns, stable isotopes, and petrography

Energy Technology Data Exchange (ETDEWEB)

Dorobek, S.L.

1987-08-01

A completely dolomitized coral-stromatoporoid biostrome occurs at the top of the Dark Dolomite member of the Jefferson Formation (Frasnian) at Grandview Canyon, Lost River Range, central Idaho. The biostrome overlies a thick sequence of dolostones that were deposited in slope to deep ramp settings. The biostrome, therefore, formed in an open marine setting after shallowing of deep water environments. Zoned dolospar cement fills dissolution vugs and tectonic fractures. Stable isotopes for zoned dolospar are -13.1 to -6.5 per thousand delta/sup 18/O (average - 11.5) and -1.5 to -0.1 per thousand delta/sup 13/C (average -0.4). REE patterns for zoned dolospar have positive Ce anomalies, but total REE abundance is similar to REE abundance for replacive dolomites. Stratigraphic occurrence in an open marine setting, stable isotopes, and REE patterns suggest replacive dolomite phases formed during shallow burial diagenesis with significant involvement of nonevaporated sea water. More negative Ce anomalies near the top of the biostrome suggest a diagenetic overprint by oxidizing meteoric waters. Zoned dolospar probably formed from warmer, reducing burial fluids. Carbon for zoned dolospar probably was recycled from preexisting dolomite. These data may be useful for interpreting the origin of other anomalous platform dolostones.

Giving Voice: Narrating silence, history and memory in André Brink ...

African Journals Online (AJOL)

Giving Voice: Narrating silence, history and memory in André Brink\\'s The Other Side of Silence and Before I Forget. ... Both narrators, though, draw attention to the problems associated with this reconstructive and potentially ... Article Metrics.

The effects of dolomitization on petrophysical properties and fracture distribution within rift-related carbonates (Hammam Faraun Fault Block, Suez Rift, Egypt)

Science.gov (United States)

Korneva, I.; Bastesen, E.; Corlett, H.; Eker, A.; Hirani, J.; Hollis, C.; Gawthorpe, R. L.; Rotevatn, A.; Taylor, R.

2018-03-01

Petrographic and petrophysical data from different limestone lithofacies (skeletal packstones, matrix-supported conglomerates and foraminiferal grainstones) and their dolomitized equivalents within a slope carbonate succession (Eocene Thebes Formation) of Hammam Faraun Fault Block (Suez Rift, Egypt) have been analyzed in order to link fracture distribution with mechanical and textural properties of these rocks. Two phases of dolomitization resulted in facies-selective stratabound dolostones extending up to two and a half kilometers from the Hammam Faraun Fault, and massive dolostones in the vicinity of the fault (100 metres). Stratabound dolostones are characterized by up to 8 times lower porosity and 6 times higher frequency of fractures compared to the host limestones. Precursor lithofacies type has no significant effect on fracture frequency in the stratabound dolostones. At a distance of 100 metres from the fault, massive dolostones are present which have 0.5 times porosity of precursor limestones, and lithofacies type exerts a stronger control on fracture frequency than the presence of dolomitization (undolomitized vs. dolomitized). Massive dolomitization corresponds to increased fracture intensity in conglomerates and grainstones but decreased fracture intensity in packstones. This corresponds to a decrease of grain/crystal size in conglomerates and grainstones and its increase in packstones after massive dolomitization. Since fractures may contribute significantly to the flow properties of a carbonate rock, the work presented herein has significant applicability to hydrocarbon exploration and production from limestone and dolostone reservoirs, particularly where matrix porosities are low.

Parts harvendas ootamatult Eesti Energia nõukogu / Andres Eilart

Index Scriptorium Estoniae

Eilart, Andres

2011-01-01

Majandus- ja kommunikatsiooniminister Juhan Parts otsustas 1. juulil päevapealt Eesti Energia nõukogu liikme kohalt tagasi kutsuda Aivar Reiviku ning Rein Kuusmiku, kes olid vastu Eesti Energia üle viie miljoni euro suurusele investeeringule Weroli rapsiõlitehase juurde rajatavasse elektri- ja küttejaama. Uuteks nõukogu liikmeteks said Andres Saame ja Toomas Tauts

Effects of the dolomite from Irati formation as additive in a refractory clay used as raw material in Santa Gertrudes ceramic cluster (SP)

International Nuclear Information System (INIS)

Souza, M.H.O.; Gaspar Junior, L.A.; Moreno, M.M.T.

2011-01-01

The effects of addition of carbonates in clays used as floor tiles have been intensively studied, but the focus usually is the pure calcite or calcitic limestone, which has nobler uses in industry, especially for cement production. However, in the important area known as Santa Gertrudes Ceramic Cluster, in Sao Paulo State, occurs mainly the dolomitic limestone, which is little studied as a potential additive which could be used in order to improve the properties of the floor tiles. This work aimed to check out the potentiality of dolomitic limestone as additive in ceramic products, especially floor tiles. Using as ingredients dolomitic limestones and refractory clay collected inside the area of the referred cluster, ceramic bodies were obtained with different dolomitic limestones contents incorporated to the refractory clay, and these ceramic bodies were mineralogically, chemically and physically analyzed. The conclusions are the dolomitic limestone can be particularly useful when incorporated to refractory clays, due to its fluxing properties. (author)

Väitlus tumma tekstiga : Hans Anton Schults ja Andres Saal / Katre Kikas

Index Scriptorium Estoniae

Kikas, Katre

2006-01-01

Artiklis käsitletakse H. A. Schults'i (1866-1905) 1903. a. Jakob Hurdale saadetud kirjutisi, kus ta polemiseerib oma kaasaegse Andres Saaliga arutledes "vanade eestlaste" moraali, rahvuse ja religiooni teemal

Removal of Phosphate from Synthetic Aqueous Solution by Adsorption with Dolomite from Padalarang

Directory of Open Access Journals (Sweden)

Fadjari Lucia Nugroho

2014-12-01

Full Text Available The presence of phosphate in wastewaters can cause eutrophication of surface water bodies leading to algal-blooming in the aquatic environment and degradation of water quality. Phosphate removal from wastewaters by conventional biological treatment removes only 10-30% of the phosphate, whilst chemical treatment using precipitants such as calcium or iron salts, although effective, is expensive and produces water-rich sludge which must be further treated. Hence, phosphate removal by adsorption in the form of Ca -phosphate has been proposed as an alternative to the more traditional methods. This study investigated the feasibility of using dolomite–a common sedimentary rock–from Padalarang, West Java, Indonesia as the adsorbent for the removal of phosphate from synthetic aqueous solution. Chemical analysis revealed that the Padalarang dolomite contains 33.6-36.2% CaO. Batch experiments at room temperature indicated that optimum removal of phosphate was achieved at pH 9. At 25°C , where increasing concentrations of phosphate (10–100 mg/L increased phosphate adsorption (2.15-31.3 mg/g by the dolomite. The adsorption of phosphate could be described by the Langmuir isotherm model, with constants Qm= 476.19 mg/g, K L= 0,00106 L/mg and equilibrium parameter (R L: 0.904 – 0.989. Phosphate adsorption by dolomite not only permits its removal but also its potential recovery for reuse.

Thermal and catalytic cracking of ethylene in presence of CaO, MgO, zeolite and calcined dolomite

Energy Technology Data Exchange (ETDEWEB)

Taralas, G; Sjoestroem, K; Jaeraas, S; Bjoernbom, E [Royal Inst. of Tech., Stockholm (Sweden). Dept. of Chemical Technology

1994-12-31

The subject of the present work is to study the effect of catalysts such as calcined dolomite (CaO.MgO), CaO (quicklime), MgO and Zeolite (EKZ-4) on the cracking of ethylene in the presence and absence of steam. N-heptane, toluene, naphthalene, thiophene have been some suitable model compounds for studies of the thermal and catalytic decomposition of tar. Previous results showed that the reaction scheme of the thermal decomposition of n-heptane was consistent with the high yield of ethylene observed in thermal decomposition of n-heptane. The effect of the reactor wall and the ferric impurities in the dolomite are also subjects of the research in this study. The results may also throw some additional light on the nature of the gas-phase thermal and catalytic reactions occurring in the use of dolomite as tar cracking catalysts. 28 refs

GUÍA DE BUCEO ECOLÓGICO DE SAN ANDRÉS ISLA COLOMBIA

Directory of Open Access Journals (Sweden)

MÁRQUEZ GERMÁN

2010-05-01

Full Text Available El buceo, tanto a pulmón como con tanques, constituye una actividad que, debidamente practicada, puede aportar al desarrollo sostenible y a la conservación de áreas marinas y en especial de arrecifes de coral, como los del Archipiélago de San Andrés y Providencia. En la medida en que implica la observación de los ecosistemas de arrecife y sus organismos, es una forma de valoración y uso sostenible de la biodiversidad, con la particularidad de que no implica su extracción, pues un mismo arrecife y sus peces, esponjas y otros organismos pueden ser observados por numerosos buzos, una y otra vez. Por otra parte, es una actividad que puede generar significativos ingresos para las regiones que tienen atractivos naturales y para sus pobladores. La GUÍA DE BUCEO ECOLÓGICO DE SAN ANDRÉS ISLA se orienta a promover el buceo como una forma de elevar la calidad y los ingresos generados por el turismo en el Archipiélago y a incrementar la conciencia sobre la necesidad de proteger los arrecifes. Presenta información básica sobre las islas, el turismo en las mismas y sus principales sitios de buceo, profusamente ilustradas con hermosas fotografías que demuestran el indudable potencial de nuestro Archipiélago para el buceo.

Ferroan dolomite cement in Cambrian sandstones: burial history and hydrocarbon generation of the Baltic sedimentary basin

DEFF Research Database (Denmark)

Sliaupa, S.; Cyziene, J.; Molenaar, Nicolaas

2008-01-01

The conditions and timing of carbonate cementation in Cambrian sandstones of the Baltic sedimentary basin were determined by oxygen and carbon stable isotope and chemical data in combination with optical and cathodoluminescence petrographic studies. Studied samples represent a range in present...... burial depth from 340 to 2150 m. The carbonate cement is dominantly ferroan dolomite that occurs as dispersed patches of poikilotopic crystals. Temperatures of dolomite precipitation, based on delta O-18 values, range from 27 degrees C in the shallow buried to 95 degrees C in the deep buried sandstones...

André Leroi-Gourhan (25 août 1911–19 février 1986)

OpenAIRE

Soulier, Philippe

2007-01-01

André Leroi-Gourhan (25th August 1911 – 19th February 1986) A short biography of André Leroi-Gourhan is here presented, beginning in 1927, at the moment of his student years, until his retirement in 1982. It rests on a systematic analysis of his publications and on his personal and professional archives, collected and studied for the first time in 2001 when the author was temporally engaged by the CNRS. Going beyond the pure biography of events, such as those already presented in numerous po...

Postsotsialismist vaatemängulinna = From Post-Socialism to the City of the Spectacle / Andres Kurg

Index Scriptorium Estoniae

Kurg, Andres, 1975-

2007-01-01

Büroo Alver Trummal Arhitektid töödest, Andres Alverist ja Tiit Trummalist. Ärihoonest Tallinnas Rävala pst. 4. Autorid: Andres Alver, Tiit Trummal, Tarmo Laht, Indrek Rünkla, Ulla Mets, Sven Koppel. Konstruktor Eido Uustalu (Eesti Projekt). Projekt 2001, valmis 2006. City Plazast Tallinnas Tartu mnt. 2. Autorid: A. Alver, T. Trummal, T. Laht, I. Rünkla, Martin Melioranski, U. Mets. Konstruktor: Tiit Masso, Pike Projekt. Sisekujundus (fuajeed, restoran): Pille Lausmäe. Projekt 2001, valmis 2004. Lõige, põhiplaan, 3 värv. välis- ja 5 sisevaadet

Establishing the Relationship between Fracture-Related Dolomite and Primary Rock Fabric on the Distribution of Reservoirs in the Michigan Basin

Energy Technology Data Exchange (ETDEWEB)

G. Michael Grammer

2006-09-30

This topical report covers the year 2 of the subject 3-year grant, evaluating the relationship between fracture-related dolomite and dolomite constrained by primary rock fabric in the 3 most prolific reservoir intervals in the Michigan Basin (Ordovician Trenton-Black River Formations; Silurian Niagara Group; and the Devonian Dundee Formation). The characterization of select dolomite reservoirs has been the major focus of our efforts in Phase II/Year 2. Fields have been prioritized based upon the availability of rock data for interpretation of depositional environments, fracture density and distribution as well as thin section, geochemical, and petrophysical analyses. Structural mapping and log analysis in the Dundee (Devonian) and Trenton/Black River (Ordovician) suggest a close spatial relationship among gross dolomite distribution and regional-scale, wrench fault related NW-SE and NE-SW structural trends. A high temperature origin for much of the dolomite in the 3 studied intervals (based upon initial fluid inclusion homogenization temperatures and stable isotopic analyses,) coupled with persistent association of this dolomite in reservoirs coincident with wrench fault-related features, is strong evidence for these reservoirs being influenced by hydrothermal dolomitization. For the Niagaran (Silurian), a comprehensive high resolution sequence stratigraphic framework has been developed for a pinnacle reef in the northern reef trend where we had 100% core coverage throughout the reef section. Major findings to date are that facies types, when analyzed at a detailed level, have direct links to reservoir porosity and permeability in these dolomites. This pattern is consistent with our original hypothesis of primary facies control on dolomitization and resulting reservoir quality at some level. The identification of distinct and predictable vertical stacking patterns within a hierarchical sequence and cycle framework provides a high degree of confidence at this point

Vulkaner andre steder i Solsystemet

DEFF Research Database (Denmark)

Haack, Henning

2007-01-01

Jupiters måne, Io, og man regner man med at Venus og formentlig også Mars stadig er vulkansk aktive. Ved at rette blikket ud i solsystemet har vi  mulighed for at studere vulkansk aktivitet under helt anderledes betingelser end her på Jorden. Hvad sker der f.eks., hvis tyngdekraften er svagere, eller...... planetens overflade måske er gloende varm? Vulkanerne andre steder i Solsystemet overgår på mange måder dem på Jorden. Venus er den planet i solsystemet, der har flest vulkaner, Mars har de største og højeste vulkaner, asteroiden Vesta har de ældste, og Jupiters måne Io har de mest aktive vulkaner i...

Proceedings of the 3. Summer School Jorge Andre Swieca in Nuclear Physics

International Nuclear Information System (INIS)

Lima, C.L.; Nemes, M.C.; Wolynec, E.

1987-01-01

This book contents the lectures and seminars presented during the Jorge Andre Swieca III Summer School-Nuclear Physics 1987 which happened in February 1987 in Itaipava - Rio de Janeiro - Brazil. (A.C.A.S.) [pt

A thermoluminescence study of vempalle dolomites and its depositional environments

International Nuclear Information System (INIS)

Bhattacharya, A.K.; Rao, C.N.; Kaul, I.K.

1976-01-01

An attempt has been made to interpret the depositional environment of Vempalle dolomites (India) by thermoluminescence method. It has been demonstrated that glow curve patterns reflect the environmental condition of deposition for carbonate sediments. The glow curves were obtained for natural samples as well as samples irradiated by Co 60 and compared. A majority of the samples were concluded to be diagenetic. (A.K.)

Andrés Rivera, Escritor social

Directory of Open Access Journals (Sweden)

Marta Waldegaray

2006-07-01

Full Text Available La narrativa de Andrés Rivera hace de la historia el material de origen de la escritura y de su convicción política de izquierda el molde en el cual desde hace ya más de cuatro décadas su escritura adquiere forma.Acontecimiento histórico, circunstancia política, poseen en sus primeras novelas el valor de verdad política, de testimonio social. La convicción ideológica que sus libros exhiben se acompaña de una trayectoria literaria que, en su práctica inicial, fue confiada a la representación r...

“O Negro André”: a questão racial na vida e no pensamento do abolicionista André Rebouças

Directory of Open Access Journals (Sweden)

Anita Maria Pequeno Soares

2017-08-01

Full Text Available The main objective of this work was to analyze how the context of racial relations influenced the construction of the self and the intellectual production of black intellectual and abolitionist André Rebouças. Through primary sources, it was possible to recreate the process of “self construction” lived by André Rebouças as a black man who had African ancestry. It was possible to notice that some characteristics of his social thought became radical at the same time the self-recognition of his racial condition became deeper, during the period in which he was self-exiled from Brazil, immediately after the proclamation of the republic in 1889. During his life in Africa, he broke his silence about his racial reality. In this period, the construction of his self goes through a transformation, as he begins to see himself and to reaffirm himself as a black and African man. This awaken to “racial consciousness” was interpreted, like Mattos suggested (2010, inspired by the concept of “double consciousness”, elaborated by Du Bois and further developed by Paul Gilroy in “The Black Atlantic” (2012.

Globaliseerumine : oht või võimalus? / Andres Arrak

Index Scriptorium Estoniae

Arrak, Andres, 1958-2017

2007-01-01

Globaliseerumise ja võrgustumise muutumine võimaluseks või ohuks sõltub konkreetse riigi majanduse ja tööturu kohanemisvõimest. Globaalsete finantsvoogude kirjeldus, kapitali ja Eestisse tulevate rahavoogude analüüs ning hinnang Eesti tööturu paindlikkusele ja ettevõtjate innovatiivsusele. Graafikud: Otse- ja portfelliinvesteeringute ning laenude sissevool Eestisse 1992-2006; Diagramm: Eesti tööjõuturg sammub Ameerika jälgedes. Vt. samas: Andres Saarniit. Raha ei ole kuhugi kadunud

Attrition of Dolomitic Lime in a Fluidized-Bed at High Temperature

Czech Academy of Sciences Publication Activity Database

Hartman, Miloslav; Svoboda, Karel; Pohořelý, Michael; Šyc, Michal; Jeremiáš, Michal

2013-01-01

Roč. 67, č. 2 (2013), s. 164-172 ISSN 0366-6352 R&D Projects: GA AV ČR IAA400720701; GA MŠk(CZ) 7C11009 Grant - others:RFCS(XE) RFCR-CT-2010-00009 Institutional support: RVO:67985858 Keywords : attrition * catalytic gasification * dolomitic lime Subject RIV: CI - Industrial Chemistry, Chemical Engineering Impact factor: 1.193, year: 2013

The genusGuenthera Andr. in Bess. (Brassicaceae, Brassiceae

Directory of Open Access Journals (Sweden)

Gómez-Campo, César

2003-12-01

Full Text Available A group of nine species -now included in Brassica— differ from all the other species in several characters, mainly in the stylar portion of their pistils always without seed primordia. Also in their branched subterranean stem (caudex with several leaf rosettes, their leaves entire to deeply pinnatifid but never pinnatisect, their shallowly notched cotyledons and their flattened, elliptic or ovoid seed contour. It is suggested to include these species under the generic denomination Guenthera Andr, in Bess. New ñames for the species and subspecies are provided, as well as a determination key for the species.Un grupo de nueve especies actualmente incluidas en Brassica difiere de todas las demás por varios caracteres, sobre todo por la porción estilar de sus pistilos, que siempre carece de primordios seminales. Además, por su tallo subterráneo ramificado, que forma un cáudex con varias rosetas; sus hojas de enteras hasta profundamente pinnatífidas, pero nunca pinnatisectas; sus cotiledones solo muy ligeramente escotados, y sus semillas, que tienden a ser elipsoidales o aplanadas. Se propone agruparlas todas bajo la denominación genérica Guenthera Andr, in Bess. Se detallan los nuevos nombres para las especies y Subespecies y se añade una clave para diferenciar las especies.

Book Review: America’s Blind Spot: Chávez, Oil and US Security by Andrés Cala and Michael Economides

DEFF Research Database (Denmark)

Boscan, Luis

2014-01-01

Review of: America’s Blind Spot: Chávez, Oil and US Security. Andrés Cala and Michael Economides. Continuum Books. 2012.......Review of: America’s Blind Spot: Chávez, Oil and US Security. Andrés Cala and Michael Economides. Continuum Books. 2012....

The Role of Chromohalobacter on Transport of Lanthanides and Cesium in the Dolomite Mineral System

Energy Technology Data Exchange (ETDEWEB)

Zengotita, Frances [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Emerson, Hilary Palmer [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Dittrich, Timothy M. [Wayne State Univ., Detroit, MI (United States); Swanson, Juliet S. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Reed, Donald T. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

2017-12-01

The chemical behavior of actinide series elements and fission products is a concern for the Waste Isolation Pilot Plant repository due to their uncertain mobility in the subsurface salt formation. In this work, we are observing the behavior of the halophilic bacterium, Chromohalobacter, and its effect on the mobility of lanthanides and cesium in the presence of dolomite. Batch and minicolumn experiments were conducted with Cs⁺ and lanthanides (Nd³⁺, Eu³⁺) to quantify potential transport with bacteria. Preliminary results show that Cs does not interact strongly with dolomite or Chromohalobacter, while the lanthanides can interact strongly with both minerals and bacteria depending on which the Ln contacts first.

Teresa Andrés y la organización Cultura Popular: una propuesta de coordinación bibliotecaria (1936-1938

Directory of Open Access Journals (Sweden)

Seguí i Francés, Romà

2011-12-01

Full Text Available Teresa Andrés Zamora es conocida por su actividad al frente de la Sección de Bibliotecas de Cultura Popular. Este trabajo describe las relaciones que se establecieron entre Teresa Andrés y Cultura Popular, tras hacerse cargo de las responsabilidades del Ministerio de Instrucción Pública.

Reaction Sintering of Mexican Dolomite – Zircon Mixtures

Directory of Open Access Journals (Sweden)

Rodríguez-Galicia, J. L.

2005-08-01

Full Text Available The present work has been conducted aiming to develop additional phase [Ca3SiO5, Ca2SiO4 and/or Ca3Mg(SiO42]-bonded magnesia refractory materials via reaction sintering of dolomite-zircon mixtures, employing a Mexican dolomite containing an excess of 3 wt% of CaCO3. The study was based on phase equilibrium data extracted from the quaternary system CaO – MgO – SiO2 – ZrO2, to put it more precisely, base on the projection from the MgO-apex of the liquidus surface of the primary crystallization volume of MgO onto the opposite face of the above mentioned quaternary system. The refractory materials designed within this system were obtained by attrition milling, followed by cold isostatic pressing and high temperature reaction sintering. All initial and produced materials were characterized by ICP-AES, XRF, XRD, SEM-EDX, DTA and TG analyses. The results obtained indicated that reaction sintering of dolomite-zircon mixtures is an interesting route to produce MgO-CaZrO3-additional phase refractory materials.

El propósito de este trabajo ha sido obtener materiales refractarios de magnesia, aglomerados con una fase adicional [Ca3SiO5, Ca2SiO4 y/o Ca3Mg(SiO42], mediante la sinterización reactiva de mezclas de dolomita-circón, empleando para ello una dolomita mexicana que contiene un exceso de 3% en peso de CaCO3. El estudio se basa en la información relativa al equilibrio de fases del sistema CaO – MgO – SiO2 – ZrO2. En concreto se usa la proyección, desde el vértice del MgO, de la superficie de liquidus del volumen de cristalización primaria de este, hacia la cara opuesta de sistema cuaternario. Los materiales refractarios diseñados se han obtenido por molienda de atrición, seguida de un prensado isostático en frío y sinterización reactiva a alta temperatura. Todos los materiales, iniciales y finales, han sido caracterizados mediante ICPAES, FRX, DRX, MEB-EDX, ATD y TG. Los resultados obtenidos indican que la sinterizaci

Revolver, kala ja harmoonia / Andres Tolts ; intervjueerinud Kadri Karro

Index Scriptorium Estoniae

Tolts, Andres, 1949-2014

2009-01-01

Andres Toltsi juubelinäitused Tallinnas: "Näitus" Tallinna Kunstihoones 25.9-25.10, "Asjad" Hobusepea galeriis 30.9-12.10, "Juubelinäitus" Haus galeriis 8.10-13.11. Kunstnik räägib oma loomingust, revolvri ja kala motiivist oma töödes, mõttekaaslusest, eestiaegsest maailmavaatest, harmooniast ja isikupärast kunstis ning elus, ilust ja inetusest, kaasaja kunstnike vajadusest oma loomingut sõnade abil seletada

Ocean acidification does not affect magnesium composition or dolomite formation in living crustose coralline algae, Porolithon onkodes in an experimental system

Science.gov (United States)

Nash, M. C.; Uthicke, S.; Negri, A. P.; Cantin, N. E.

2015-09-01

There are concerns that Mg-calcite crustose coralline algae (CCA), which are key reef builders on coral reefs, will be most susceptible to increased rates of dissolution under higher pCO2 and ocean acidification. Due to the higher solubility of Mg-calcite, it has been hypothesised that magnesium concentrations in CCA Mg-calcite will decrease as the ocean acidifies, and that this decrease will make their skeletons more chemically stable. In addition to Mg-calcite, CCA Porolithon onkodes, the predominant encrusting species on tropical reefs, can have dolomite (Ca0.5Mg0.5CO3) infilling cell spaces which increases their stability. However, nothing is known about how bio-mineralised dolomite formation responds to higher pCO2. Using P. onkodes grown for 3 and 6 months in tank experiments, we aimed to determine (1) if mol % MgCO3 in new crust and new settlement was affected by increasing CO2 levels (365, 444, 676 and 904 μatm), (2) whether bio-mineralised dolomite formed within these time frames, and (3) if so, whether this was effected by CO2. Our results show that there was no significant effect of CO2 on mol % MgCO3 in any sample set, indicating an absence of a plastic response under a wide range of experimental conditions. Dolomite within the CCA cells formed within 3 months and dolomite abundance did not vary significantly with CO2 treatment. While evidence mounts that climate change will impact many sensitive coral and CCA species, the results from this study indicate that reef-building P. onkodes will continue to form stabilising dolomite infill under near-future acidification conditions, thereby retaining its higher resistance to dissolution.

The effect of dolomite type and Al2O3 content on the phase composition in aluminous cements containing spinel

Directory of Open Access Journals (Sweden)

R. Naghizadeh

2011-06-01

Full Text Available In this paper, the effect of dolomite type and Al2O3 content on the phase composition in aluminous cements containing MA spinel is investigated. For this reason, the raw and calcined dolomites are used as raw materials along with calcined alumina in the preparation of the cement. Then, different compositions are prepared at 1350°C using the sintering method and their mineralogical compositions are investigated using the diffractometric technique. Also, their microstructures arre evaluated. The results indicate that raw materials used have great effect on the type and amount of formed phases in cement composition. Independently of the dolomite type used, a mixed phase product consisting of spinel accompanied by CA and CA2 is obtained. The content of CA phase in the cement composition is decreased with increasing of Al2O3 in the raw materials composition. On the other hand, the content of CA2 phase is increased with the addition of Al2O3. In addition, the results show that the formation of C12A7 is favored by use of calcined dolomite.

Läänemere strateegia arvestab kodanike ettepanekutega / Jose Palma Andres ; interv. Erkki Bahovski

Index Scriptorium Estoniae

Palma Andres, Jose

2008-01-01

Euroopa Komisjoni regionaalpoliitika peadirektoraadi direktor Jose Palma Andres vastab küsimustele, mis puudutavad avalikku debatti Läänemere strateegia üle ning Venemaa partnerlust Läänemere strateegias. Lisa: [Läänemere strateegia

Lower Cretaceous Puez key-section in the Dolomites - towards the mid-Cretaceous super-greenhouse

Science.gov (United States)

Lukeneder, A.; Halásová, E.; Rehákova, D.; Józsa, Š.; Soták, J.; Kroh, A.; Jovane, L.; Florindo, F.; Sprovieri, M.; Giorgioni, M.; Lukeneder, S.

2012-04-01

Investigations on different fossil groups in addition to isotopic, paleomagnetic and geochemical analysis are combined to extract the Early Cretaceous history of environmental changes, as displayed by the sea level and climate changes. Results on biostratigraphy are integrated with other dating methods as magnetostraigraphy, correlation and cyclostratigraphy. The main investigation topics of the submitted project within the above-described framework are the biostratigraphic (Lukeneder and Aspmair, 2006, 2012), palaeoecological (Lukeneder, 2008, 2012), palaeobiogeographic, lithostratigraphic (Lukeneder, 2010, 2011), cyclostratigraphic and magnetostratigraphic development of the Early Cretaceous in the Puez area. The main sections occur in expanded outcrops located on the southern margin of the Puez Plateau, within the area of the Puez-Geisler Natural Park, in the northern part of the Dolomites (South Tyrol, North Italy). The cephalopod, microfossil and nannofossil faunas and floras from the marly limestones to marls here indicates Hauterivian to Albian/Cenomanian age. Oxygen isotope values from the Lower Cretaceous Puez Formation show a decreasing trend throughout the log, from -1.5‰ in the Hauterivian to -4.5‰ in the Albian/Cenomanian. The decreasing values mirror an increasing trend in palaeotemperatures from ~ 15-18°C in the Hauterivian up to ~25-30 °C in the Albian/Cenomanian. The trend probably indicates the positive shift in temperature induced by the well known Mid Cretaceous Ocean warming (e.g., Super-Greenhouse). The cooperative project (FWF project P20018-N10; 22 international scientists): An integrative high resolution project. Macro- and microfossils, isotopes, litho-, cyclo-, magneto-and biostratigraphy as tools for investigating the Lower Cretaceous within the Dolomites (Southern Alps, Northern Italy) -The Puez area as a new key region of the Tethyan Realm), is on the way since 2008 by the Natural History Museum in Vienna and the 'Naturmuseum S�

THE ANISIAN MACROFLORA FROM THE NORTHERN DOLOMITES (KÜHWIESENKOPF/ MONTE PRÀ DELLA VACCA, BRAIES: A FIRST REPORT

Directory of Open Access Journals (Sweden)

CARMEN BROGLIO LORIGA

2002-11-01

Full Text Available The knowledge of Triassic macroflora from the Dolomites mostly concerns the Ladinian, while literature data on Anisian plants are scarce. This gap is filled by the discovery, reported here, of a rich plant deposit from Kühwiesenkopf / Monte Prà della Vacca (Prags/Braies Dolomites. The fossils occur in a horizon, about 1 m thick, from the lower part of the Dont Formation, a basinal unit mostly constituted by hemipelagic, terrigenous-carbonatic sediments of Pelsonian - Illyrian age. The stratigrafic interval with the plant horizon is Pelsonian in age. A preliminary systematic analysis of the numerous and well preserved specimens has allowed the identification of at least 17 genera. The taxa belong primarily to the Pteridophyta (Anomopteris, Neuropteridium, Cladophlebis, Crematopteris, ?Marattiopsis, subordinately to the Cycadophyta (Bjuvia, Taeniopteris, Dioonitocarpidium, Pterophyllum / Nilssonia. Coniferophyta are represented by Voltzia, ?Voltzia and Albertia; the latter genus is recorded herein for the first time in the Middle Triassic of the Dolomites. Besides, two Lycophyta genera (?Isoetites, Lycophyta new taxon, three Pteridospermae genera (?Sagenopteris, Scytophyllum and Peltaspermum, and one Sphenophyta genus (Equisetites have also been recognized.   

"Riigikogu hoone 90" = "Estonian parliament building 90" / Janno Roos, Andres Labi

Index Scriptorium Estoniae

Roos, Janno, 1976-

2013-01-01

Eesti Sisearhitektide Liidu 2012. aasta näituse kujunduse preemia pälvinud näitusest (Lossiplats 1A). Kujunduse autorid Janno Roos ja Andres Labi (Ruumilabor). Kuraator Mait Väljas. Graafiline disain: Identity. Sisearhitekti ja ESLi aastapreemiate žürii liikme Mari Kurismaa ning arhitektuuriajaloolase Leele Välja arvamused

SUTD-i koorik = SUTD Gridshell / Andres Sevtšuk, Raul Kalvo

Index Scriptorium Estoniae

Sevtšuk, Andres, 1981-

2013-01-01

Singapuri Tehnoloogia ja Disaini Ülikooli (SUTD) raamatukogu paviljon. Eskiis valmis esimese aasta üliõpilastele korraldatud töötoas. Algse ideega töötas edasi City Form Lab (arhitektid Andres Sevtšuk, Raul Kalvo). Paviljon pandi kokku ligi saja üliõpilase osalusel. Valmis: mai 2013

Baltoscandal on lõppenud, uued mõtted on saadud / Andres Keil

Index Scriptorium Estoniae

Keil, Andres, 1974-

2006-01-01

Eesti teater oli Baltoscandalil koondatud olematu teatri mõiste alla. Andres Noormetsa "Reunioon", Mart Kangro ja Ansambel U "Mäng", Marco Laimre "Vangistus", Asko Künnapi "Säälpool jõge", Anders Härmi "Cooking and Shitting", Sven Kuntu "Miks Eesti mehed ei tantsi?", Linnar Priimäe "Inimese lõhn"

Jacobsens ukendte samling af stensager fra den græske oldtid. Obsidian, økser, matricer, ansigtssten og andre sjældne oldsager

DEFF Research Database (Denmark)

Sørensen, Lasse

2012-01-01

Jacobsens ukendte samling af stensager fra den græske oldtid. Obsidian, økser, matricer, ansigtssten og andre sjældne oldsager......Jacobsens ukendte samling af stensager fra den græske oldtid. Obsidian, økser, matricer, ansigtssten og andre sjældne oldsager...

Data Validation Package, December 2015, Groundwater Sampling at the Bluewater, New Mexico, Disposal Site, September 2016

Energy Technology Data Exchange (ETDEWEB)

Tsosie, Bernadette [U. S. Department of Energy, Washington, DC (United States). Office of Legacy Management; Johnson, Richard [Navarro Research and Engineering, Oak Ridge, TN (United States)

2016-09-01

Groundwater samples were collected from monitoring wells at the Bluewater, New Mexico, Disposal Site to monitor groundwater contaminants as specified in the 1997 Long-Term Surveillance Plan for the DOE Bluewater (UMTRCA Title II) Disposal Site Near Grants, New Mexico (LTSP). Sampling and analyses were conducted as specified in the Sampling and Analysis Plan for U.S. Department of Energy Office of Legacy Management Sites (LMS/PRO/S04351, continually updated). A duplicate sample was collected from location HMC-951. Alluvium wells are completed in the alluvial sediments in the former channel of the Rio San Jose, which was covered by basalt lava flows known as the El Malpais, and are identified by the suffix (M). Bedrock wells are completed in the San Andres Limestone/Glorieta Sandstone hydrologic unit (San Andres aquifer) and are identified by the suffix (SG). Wells HMC-951 and OBS-3 are also completed in the San Andres aquifer. The LTSP requires monitoring for molybdenum, selenium, uranium, and polychlorinated biphenyls (PCBs); PCB monitoring occurs only during November sampling events. This event included sampling for an expanded list of analytes to characterize the site aquifers and to support a regional groundwater investigation being conducted by the New Mexico Environment Department.

The influence of mineralization on the phase composition and properties of low-burned clay-dolomited composition materials

International Nuclear Information System (INIS)

Shirin-zade, I.N.; Ganbarov, D.M.

2008-01-01

With aim of acceleration of dissociation of carbonates in clay-dolomited compositions Na 2 SiF 6 was added. Addition mineralization raise stability of composition reaches 20-30 MPa. Na 2 SiF 6 mineralization makes more active decomposition of dolomite and accelerate appearance of new creations. It was experimentally proved that adding of mineralization of Na 2 SiF 6 promote to appearance in mixture of intermediate double salts which are bring down temperature of dissociation of carbonates. Accelerated action of mineralization Na 2 SiF 6 accepted by x-ray, DTA and x-ray spectroscopy

Effect of dolomite and biochar addition on N2O and CO2 emissions from acidic tea field soil.

Science.gov (United States)

Oo, Aung Zaw; Sudo, Shigeto; Akiyama, Hiroko; Win, Khin Thuzar; Shibata, Akira; Yamamoto, Akinori; Sano, Tomohito; Hirono, Yuhei

2018-01-01

A laboratory study was conducted to study the effects of liming and different biochar amendments on N2O and CO2 emissions from acidic tea field soil. The first experiment was done with three different rates of N treatment; N 300 (300 kg N ha-1), N 600 (600 kg N ha-1) and N 900 (900 kg N ha-1) and four different rates of bamboo biochar amendment; 0%, 0.5%, 1% and 2% biochar. The second experiment was done with three different biochars at a rate of 2% (rice husk, sawdust, and bamboo) and a control and lime treatment (dolomite) and control at two moisture levels (50% and 90% water filled pore space (WFPS)). The results showed that dolomite and biochar amendment significantly increased soil pH. However, only biochar amendment showed a significant increase in total carbon (C), C/N (the ratio of total carbon and total nitrogen), and C/IN ratio (the ratio of total carbon and inorganic nitrogen) at the end of incubation. Reduction in soil NO3--N concentration was observed under different biochar amendments. Bamboo biochar with the rates of 0.5, 1 and 2% reduced cumulative N2O emission by 38%, 48% and 61%, respectively, compare to the control soil in experiment 1. Dolomite and biochar, either alone or combined significantly reduced cumulative N2O emission by 4.6% to 32.7% in experiment 2. Reduction in N2O production under biochar amendment was due to increases in soil pH and decreases in the magnitude of mineral-N in soil. Although, both dolomite and biochar increased cumulative CO2 emission, only biochar amendment had a significant effect. The present study suggests that application of dolomite and biochar to acidic tea field soil can mitigate N2O emissions.

REPRESENTACIONES DE LOS AFRICANOS Y SUS DESCENDIENTES EN LA OBRA DE TOMÁS CARRASQUILLA

OpenAIRE

Moreno Tovar, Lina Del Mar

2012-01-01

Parte de las preguntas que inspiraron esta tesis surgieron hace un par de años en San Andrés, una pequeña isla colombiana de apenas 26 km 2 ubicada en el mar Caribe a 190 km de la costa nicaragüense y 755 km de Cartagena, la ciudad colombiana más cercana. Junto con las islas de Providencia y Santa Catalina, San Andrés hace parte del único departamento insular colombiano, así como el que presenta mayores contrastes culturales respecto de la Colombia continental, no sólo andina o...

New explanation for extreme u-234 u-238 disequilibria in a dolomitic aquifer

CSIR Research Space (South Africa)

Kronfeld, J

1994-05-01

Full Text Available High U-234/U-238 activity ratios are found in the shallow groundwater of the phreatic Transvaal Dolomite Aquifer. The aquifer is uranium poor, while the waters are oxygen rich and young. Tritium and C-14 are used to show that the disequilibrium...

The Ranero Hydrothermal Dolomites (Albian, Karrantza Valley, Northwest Spain: Implications on Conceptual Dolomite Models Les dolomies hydrothermales de Ranero (Albien, vallée de la Karrantza, nord-ouest de l’Espagne : conséquences sur les modèles génétiques

Directory of Open Access Journals (Sweden)

Nader F.H.

2012-02-01

Full Text Available Field characteristics, petrographic and geochemical signatures, as well as some petrophysical aspects of fault-related dolomite bodies in the Ranero area (Karrantza Valley, NW Spain are presented in this paper. These dolomite bodies are hosted by Albian slope to platform carbonates, which were deposited in the Basque-Cantabrian Basin. Replacive and void-filling dolomite phases – postdating palaeo- and hypogene karstification – are interpreted to have originated from hydrothermal fluid pulses, and are spatially related with faults and fractures. Hydrothermal calcite cements pre- and postdate dolomitization. Mineralogical and geochemical investigations (XRD, ICP-MS/OES, XRF, stable and Sr isotopes helped in distinguishing various dolomite and calcite phases. Dolomite phases can be grouped into ferroan (early and non-ferroan (late. Dolomites are generally stoichiometric and exhibit a broad range of depleted δ18O values (–18.7 to –10.5‰ V-PDB, which advocate for multiphase dolomitization and/or recrystallization at relatively high temperatures (150-200°C. The observation that bed-parallel stylolites pre- and post-date dolomites suggests that dolomitization occurred during the Late Albian regional tectonic activity and related fluid expulsions. Based on carbonate chemistry, authigenic silicate chemistry and replacement relationships, two contrasting types of dolomitizing fluids are inferred. Both arguably may have initiated as sulphatedominated brines and/or basin compactional fluids, but they seemingly undergo sulphate reduction in contact with host rocks of contrasting compositions (Fe-rich silicate vs Fe-poor carbonate thus evolving either to acidic and ferroan (limestone replacive or to neutral, Fe-poor and sulfidic (Fe-dolomite replacive. Fluid drives are not well constrained by our data, but both fluid types are focused along major faults that cross cut the platform edge and are associated with diapir tectonics. Les modalités de

Interface waves propagating along tensile fractures in dolomite

International Nuclear Information System (INIS)

Roy, S.; Pyrak-Nolte, L.J.

1995-01-01

Elastic interface waves have been observed in induced tensile fractures in dolomite rock cores. Multiscaling wavelet analysis distinguishes the interface wave from bulk shear waves, quantifies the interface wave spectral content, and determines the arrival time of peak energy. The dominant seismic energy is concentrated in the slow interface wave, with little or no detectable energy in the fast wave. As stress across the fracture increases, the slow interface wave velocity increases, and the frequency of the spectral peak shifts to higher frequencies. The shear dynamic specific stiffness of the fracture was calculated from the peak energy arrival time as a function of stress. 13 refs., 5 figs., 1 tab

Petrophysical characterization of the Dolomitic Member of the Boñar Formation (Upper Cretaceous; Duero Basin, Spain) as a potential CO2 reservoir

Energy Technology Data Exchange (ETDEWEB)

Suarez-Gonzalez, A.; Kovacs, C.; Herrero-Hernandez, A.; Gomez-Fernandez, F.

2016-07-01

Boñar Formation (Upper Cretaceous) is a mainly carbonate succession, which outcrops in the North of Duero Basin (Spain). According to the existing data, the Dolomitic Member of this formation appears to be the most suitable for geological storage of CO2. The main objective of this study is to find evidence to support, clarify and specify –at an initial level– the potential of the Dolomitic Member of the Boñar Formation as a geological reservoir. The study covers density, porosity and permeability tests on samples obtained from the outcrop of the succession near the village of Boñar (León). According to the analysis and interpretation of the mentioned petrophysical properties, the porosity of the Dolomitic Member is within the acceptable range for CO2 geological storage, but the permeability values are far too low. This minimizes the possibilities of the Dolomitic Member –and probably of the whole Boñar Formation– to become an appropriate CO2 reservoir. (Author)

San Francisco folio, California, Tamalpais, San Francisco, Concord, San Mateo, and Haywards quadrangles

Science.gov (United States)

Lawson, Andrew Cowper

1914-01-01

The five sheets of the San Francisco folio the Tamalpais, Ban Francisco, Concord, Ban Mateo, and Haywards sheets map a territory lying between latitude 37° 30' and 38° and longitude 122° and 122° 45'. Large parts of four of these sheets cover the waters of the Bay of San Francisco or of the adjacent Pacific Ocean. (See fig. 1.) Within the area mapped are the cities of San Francisco, Oakland, Berkeley, Alameda, Ban Rafael, and San Mateo, and many smaller towns and villages. These cities, which have a population aggregating about 750,000, together form the largest and most important center of commercial and industrial activity on the west coast of the United States. The natural advantages afforded by a great harbor, where the railways from the east meet the ships from all ports of the world, have determined the site of a flourishing cosmopolitan, commercial city on the shores of San Francisco Bay. The bay is encircled by hilly and mountainous country diversified by fertile valley lands and divides the territory mapped into two rather contrasted parts, the western part being again divided by the Golden Gate. It will therefore be convenient to sketch the geographic features under four headings (1) the area east of San Francisco Bay; (2) the San Francisco Peninsula; (3) the Marin Peninsula; (4) San Francisco Bay. (See fig. 2.)

Noblessneri Loomemaja = Noblessner Creative house / Rasmus Tamme, Jaanus Saarepera, Eero Jürgenson, Andres Jomp

Index Scriptorium Estoniae

2015-01-01

Noblessneri Loomemaja Tallinnas Tööstuse 48/Peetri 11, valminud 2014. Arhitektid Rasmus Tamme, Jaanus Saarepera (ARS Projekt), sisearhitektid Eero Jürgenson, Andres Jomp (ARS Projekt). 2014. aasta Kultuurkapitali Arhitektuuripreemia kandidaat

Abjeção em textos de André Sant’Anna

Directory of Open Access Journals (Sweden)

Leandro Salgueirinho

2009-07-01

Full Text Available Trata-se de uma leitura de textos do escritor André Sant’Anna a partir da problematização que, em The Return of the Real (1986, o crítico de arte norte-americano Hal Foster faz da noção de abjeto e da dita abject art.

Andres Ehin tähistas sünnipäeva raamatuesitlusega / Maire Kõrver

Index Scriptorium Estoniae

Kõrver, Maire, 1961-

2006-01-01

Andres Ehin esitles oma luulekogu "Põdrapõrnikapääsukene" ja selle ingliskeelset tõlget "Moose Beetle Swallow" oma sünnipäeval Iiri suursaadiku residentsis, kus oli kohal ka luulekogu tõlkija, Iiri luuletaja Patrick Cotter

Tallinna idee / Andres Alver, Ott Alver, Marten Kaevats ; intervjueerinud Margit Mutso ; kommenteerinud Douglas Gordon

Index Scriptorium Estoniae

Alver, Andres, 1953-

2011-01-01

17. veebruaril esitleti raamatut "Tallinna idee", mis on koostatud Eesti Kunstiakadeemia 4. kursuse arhitektuuritudengite kursuseprojektide põhjal. Tallinna teemal vestlevad tudengid Ott Alver ja Marten Kaevats ning nende juhendaja professor Andres Alver

Teresa Andrés Zamora (1907-1946: el compromiso social y político como arma de cultura

Directory of Open Access Journals (Sweden)

Seguí i Francés, Romà

2010-12-01

Full Text Available La biografía de Teresa Andrés Zamora (Villalba de los Alcores, 1907- París, 1946 es un claro ejemplo de cómo el compromiso de una mujer republicana a través de la cultura se transformó en beligerancia política. Este artículo quiere mostrar una imagen de Teresa Andrés más profunda que la de una bibliotecaria que militó en el PCE, pretendiendo reconstruir su recorrido vital tanto en la faceta académica como profesional y política, con el objetivo de presentar una evolución que va desde su paso por la Residencia de Señoritas hasta su prematura muerte en París. Teresa Andrés Zamora representa una generación de mujeres republicanas que fue leal a la II República, trabajando incansablemente durante la Guerra Civil, y que padeció el exilio en una Francia ocupada.

Giving Voice: Narrating silence, history and memory in André Brink ...

African Journals Online (AJOL)

This essay examines André Brink's two most recent novels, The Other Side of Silence (2002) and Before I Forget (2004), in terms of their voicing of silence and the rewriting of history and memory. Each has a theme familiar to Brink's readers – an historical story of colonial violence and violation avenged; and the recounting ...

The stratigraphy of the Malmani dolomite subgroup in the Carletonville area, Transvaal: genetic implications for lead-zinc mineralization

International Nuclear Information System (INIS)

Clay, A.N.

1986-01-01

The geological setting of a borehole intersection of lead-zinc mineralization in the Malmani Dolomite Subgroup in the Carletonville area is discussed. It is suggested that the lead and zinc ions were derived from the overlying shales, transported as bisulphide complexes in silica-enriched, alkaline solutions, and deposited during silicification in the upper part of the dolomite succession which contains relic evaporites. Lead isotope data suggests that the known lead-zinc deposits in the Transvaal sequence are not of major importance. However, the dolomites are regarded as very probable hosts for Mississippi Valley type base metal deposits and offer important exploration targets. This study includes lead isotopic data. Lead isotope compositions and model lead ages for galenas in the zinc deposits are shown. It is concluded that the leads have undergone either a two-stage evolution process, or have mixed with 206 Pb-enriched ores. Model ages suggest that the lead was derived from an approximate 2,7 Ga source and that mineralization took place at 1,7 Ga

Spectroscopic characterization of Greek dolomitic marble surface interacted with uranium and thorium in aqueous solutions

International Nuclear Information System (INIS)

Godelitsas, A.; Kokkoris, M.; Chatzitheodoridis, E.; Misaelides, P.

2008-01-01

The surface of a typical Greek (Thassian) dolomitic marble was studied after interaction with U- and Th-containing aqueous solutions (1000 mg/L, free-drift experiments for 1 week at atmospheric P CO 2 ), using 12 C-RBS and Laser μ-Raman spectroscopy. Powder-XRD and SEM-EDS were also applied to investigate the phases deposited on the surface of the interacted samples. The obtained results indicated a considerable removal of U from the aqueous medium mainly due to massive surface precipitation of amorphous UO 2 -hydroxide phases forming a relatively thick (μm-sized) coating on the carbonate substrate. The interaction of Th with dolomitic marble surface is also intense leading to a formation of an amorphous Th-hydroxide layer of similar thickness but of significantly lower elemental atomic proportion

Spectroscopic characterization of Greek dolomitic marble surface interacted with uranium and thorium in aqueous solutions

Energy Technology Data Exchange (ETDEWEB)

Godelitsas, A. [Faculty of Geology and Geoenvironment, University of Athens, 15784 Zographou, Athens (Greece)], E-mail: agodel@geol.uoa.gr; Kokkoris, M. [School of Applied Mathematics and Physics, National Technical University of Athens, 15780 Zographou, Athens (Greece); Chatzitheodoridis, E. [School of Mining and Metallurgical Engineering, National Technical University of Athens, 15780 Zographou, Athens (Greece); Misaelides, P. [Faculty of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki (Greece)

2008-05-15

The surface of a typical Greek (Thassian) dolomitic marble was studied after interaction with U- and Th-containing aqueous solutions (1000 mg/L, free-drift experiments for 1 week at atmospheric P{sub CO{sub 2}}), using {sup 12}C-RBS and Laser {mu}-Raman spectroscopy. Powder-XRD and SEM-EDS were also applied to investigate the phases deposited on the surface of the interacted samples. The obtained results indicated a considerable removal of U from the aqueous medium mainly due to massive surface precipitation of amorphous UO{sub 2}-hydroxide phases forming a relatively thick ({mu}m-sized) coating on the carbonate substrate. The interaction of Th with dolomitic marble surface is also intense leading to a formation of an amorphous Th-hydroxide layer of similar thickness but of significantly lower elemental atomic proportion.

Spectroscopic characterization of Greek dolomitic marble surface interacted with uranium and thorium in aqueous solutions

Science.gov (United States)

Godelitsas, A.; Kokkoris, M.; Chatzitheodoridis, E.; Misaelides, P.

2008-05-01

The surface of a typical Greek (Thassian) dolomitic marble was studied after interaction with U- and Th-containing aqueous solutions (1000 mg/L, free-drift experiments for 1 week at atmospheric PCO2), using 12C-RBS and Laser μ-Raman spectroscopy. Powder-XRD and SEM-EDS were also applied to investigate the phases deposited on the surface of the interacted samples. The obtained results indicated a considerable removal of U from the aqueous medium mainly due to massive surface precipitation of amorphous UO2-hydroxide phases forming a relatively thick (μm-sized) coating on the carbonate substrate. The interaction of Th with dolomitic marble surface is also intense leading to a formation of an amorphous Th-hydroxide layer of similar thickness but of significantly lower elemental atomic proportion.

Diagenesis of a drapery speleothem from Castañar Cave: from dissolution to dolomitization

Directory of Open Access Journals (Sweden)

Martín-Pérez A.

2012-07-01

Full Text Available A drapery speleothem (DRA-1 from Castañar Cave in Spain was subjected to a detailed petrographical study in order to identify its primary and diagenetic features. The drapery’s present day characteristics are the result of the combined effects of the primary and diagenetic processes that DRA-1 underwent. Its primary minerals are calcite, aragonite and huntite. Calcite is the main constituent of the speleothem, whereas aragonite forms as frostwork over the calcite. Huntite is the main mineral of moonmilk which covers the tips of aragonite. These primary minerals have undergone a set of diagenetic processes, which include: 1 partial dissolution or corrosion that produces the formation of powdery matt-white coatings on the surface of the speleothem. These are seen under the microscope as dark and highly porous microcrystalline aggregates; 2 total dissolution produces pores of few cm2 in size; 3 calcitization and dolomitization of aragonite result in the thickening and lost of shine of the aragonite fibres. Microscopically, calcitization is seen as rhombohedral crystals which cover and replace aragonite forming mosaics that preserve relics of aragonite precursor. Dolomitization results in the formation of microcrystalline rounded aggregates over aragonite fibres. These aggregates are formed by dolomite crystals of around 1 μm size. The sequence of diagenetic processes follows two main pathways. Pathway 1 is driven by the increase of saturation degree and Mg/Ca ratio of the karstic waters and is visible in the NW side of the drapery. This sequence of processes includes: 1 aragonite and huntite primary precipitation and 2 dolomitization. Pathway 2 is driven by a decrease in the degree of saturation of calcite and aragonite and Mg/Ca ratio of the cave waters, and it is observed in the SE side of the drapery. The diagenetic processes of the second pathway include: 1 calcitization of aragonite; 2 incomplete dissolution (micritization of both

Simulation of flow in the Edwards Aquifer, San Antonio region, Texas, and refinement of storage and flow concepts

Science.gov (United States)

Maclay, Robert W.; Land, Larry F.

1988-01-01

The Edwards aquifer is a complexly faulted, carbonate aquifer lying within the Balcones fault zone of south-central Texas. The aquifer consists of thin- to massive-bedded limestone and dolomite, most of which is in the form of mudstones and wackestones. Well-developed secondary porosity has formed in association with former erosional surfaces within the carbonate rocks, within dolomitized-burrowed tidal and evaporitic deposits, and along inclined fractures to produce an aquifer with transmissivities greater than 100 ft2/s. The aquifer is recharged mainly by streamflow losses in the outcrop area of the Edwards aquifer and is discharged by major springs located at considerable distances, as much as 150 mi, from the areas of recharge and by wells. Ground-water flow within the Edwards aquifer of the San Antonio region was simulated to investigate concepts relating to the storage and flow characteristics. The concepts of major interest were the effects of barrier faults on flow direction, water levels, springflow, and storage within the aquifer. A general-purpose, finite-difference model, modified to provide the capability of representing barrier faults, was used to simulate ground-water flow and storage in the aquifer. The approach in model development was to conduct a series of simulations beginning with a simple representation of the aquifer framework and then proceeding to subsequent representations of increasing complexity. The simulations investigated the effects of complex geologic structures and of significant changes in transmissivity, anisotropy, and storage coefficient. Initial values of transmissivity, anisotropy, and storage coefficient were estimated based on concepts developed in previous studies. Results of the simulations confirmed the original estimates of transmissivity values (greater than 100 square feet/s) in the confined zone of the aquifer between San Antonio and Comal Springs. A storage coefficient of 0.05 in the unconfined zone of the aquifer

Korterelamu Tallinnas Weizenbergi 29 = Apartment Building in Tallinn, at 29 Weizenbergi Street / Andres Alver

Index Scriptorium Estoniae

Alver, Andres, 1953-

2001-01-01

Puitvoodriga betoonist kastjas hoone. Projekteerija Alver Trummal Arhitektid. Arhitektid Andres Alver ja Tarmo Laht. Eriosad: Eesti Projekt. Projekt 1998, valmis 2000. 3 ill.: põhiplaan, välisvaade, Pille Lausmäe kujundatud korteri vaade

Hydrothermal dolomitization of the Bekhme formation (Upper Cretaceous), Zagros Basin, Kurdistan Region of Iraq: Record of oil migration and degradation

Science.gov (United States)

Mansurbeg, Howri; Morad, Daniel; Othman, Rushdy; Morad, Sadoon; Ceriani, Andrea; Al-Aasm, Ihsan; Kolo, Kamal; Spirov, Pavel; Proust, Jean Noel; Preat, Alain; Koyi, Hemin

2016-07-01

The common presence of oil seepages in dolostones is widespread in Cretaceous carbonate successions of the Kurdistan Region of Iraq. This integrated field, petrographic, chemical, stable C, O and Sr isotopes, and fluid inclusion study aims to link dolomitization to the origin and geochemical evolution of fluids and oil migration in the Upper Cretaceous Bekhme carbonates. Flux of hot basinal (hydrothermal) brines, which is suggested to have occurred during the Zagros Orogeny, resulted in dolomitization and cementation of vugs and fractures by coarse-crystalline saddle dolomite, equant calcite and anhydrite. The saddle dolomite and host dolostones have similar stable isotopic composition and formed prior to oil migration from hot (81-115 °C) basinal NaCl-MgCl2-H2O brines with salinities of 18-22 wt.% NaCl eq. The equant calcite cement, which surrounds and hence postdates saddle dolomite, has precipitated during oil migration from cooler (60-110 °C) NaCl-CaCl2-H2O brines (14-18 wt.% NaCl eq). The yellowish fluorescence color of oil inclusions in the equant calcite indicates that the oil had API gravity of 15-25° composition, which is lighter than present-day oil in the reservoirs (API of 10-17°). This difference in oil composition is attributed to oil degradation by the flux of meteoric water, which is evidenced by the low δ13C values (- 8.5‰ to - 3.9‰ VPDB) as well as by nil salinity and low temperature in fluid inclusions of late columnar calcite cement. This study demonstrates that linking fluid flux history and related diagenesis to the tectonic evolution of the basin provides important clues to the timing of oil migration, degradation and reservoir evolution.

Cyclic carbonation calcination studies of limestone and dolomite for CO{sub 2} separation from combustion flue gases - article no. 011801

Energy Technology Data Exchange (ETDEWEB)

Senthoorselvan, S.; Gleis, S.; Hartmut, S.; Yrjas, P.; Hupa, M. [TUM, Garching (Germany)

2009-01-15

Naturally occurring limestone and dolomite samples, originating from different geographical locations, were tested as potential sorbents for carbonation/calcination based CO{sub 2} capture from combustion flue gases. Samples have been studied in a thermogravimetric analyzer under simulated flue gas conditions at three calcination temperatures, viz., 750{sup o}C, 875{sup o}C, and 930{sup o}C for four carbonation calcination reaction (CCR) cycles. The dolomite sample exhibited the highest rate of carbonation than the tested limestones. At the third cycle, its CO{sub 2} capture capacity per kilogram of the sample was nearly equal to that of Gotland, the highest reacting limestone tested. At the fourth cycle it surpassed Gotland, despite the fact that the CaCO{sub 3} content of the Sibbo dolomite was only 2/3 of that of the Gotland. Decay coefficients were calculated by a curve fitting exercise and its value is lowest for the Sibbo dolomite. That means, most probably its capture capacity per kilogram of the sample would remain higher well beyond the fourth cycle. There was a strong correlation between the calcination temperature, the specific surface area of the calcined samples, and the degree of carbonation. It was observed that the higher the calcination temperature, the lower the sorbent reactivity. For a given limestone/dolomite sample, sorbents CO{sub 2} capture capacity depended on the number of CCR cycles and the calcination temperature. According to the equilibrium thermodynamics, the CO{sub 2} partial pressure in the calciner should be lowered to lower the calcination temperature. This can be achieved by additional steam supply into the calciner. Steam could then be condensed in an external condenser to single out the CO{sub 2} stream from the exit gas mixture of the calciner. A calciner design based on this concept is illustrated.

Maramaa elust poksi ja graffitini / Andres Lepik, Ott Aardam ; interv. Gert Kiiler

Index Scriptorium Estoniae

Lepik, Andres

2008-01-01

Ugala teater alustas 89. hooaega. Esimese poole plaanitud esietendused : Toomas Suumani "Linnapea" Heiki Raudla raamatu "August Maramaa aeg" järgi, lavastaja Andres Lepik. Ott Aardami noortetükist "Poks", lavastaja autor. Gerald Sibleyras' "Grafiti", lavastaja Taago Tubin. Silvia Soro jõulunäidend "Inetu pardipoja" ainetel, lavastaja Oleg Titov

Film, ruum ja narratiiv : "Mis juhtus Andres Lapeteusega?" ning "Viini postmark" / Eva Näripea

Index Scriptorium Estoniae

Näripea, Eva, 1980-

2011-01-01

Analüüsitakse narratiivi aegruumi loomise viise juhtumi analüüsi vormis, vaadeldes kaht eesti mängufilmi : G. Kromanovi "Mis juhtus Andres Lapeteusega?" (Tallinnfilm, 1966) ja Veljo Käsperi "Viini postmark" (Tallinnfilm, 1967)

Film, ruum ja narratiiv : "Mis juhtus Andres Lapeteusega?" ning "Viini postmark" / Eva Näripea

Index Scriptorium Estoniae

Näripea, Eva

2006-01-01

Analüüsitakse narratiivi aegruumi loomise viise juhtumi analüüsi vormis, vaadeldes kaht eesti mängufilmi : G. Kromanovi "Mis juhtus Andres Lapeteusega?" (Tallinnfilm, 1966) ja Veljo Käsperi "Viini postmark" (Tallinnfilm, 1967)

Interpretation of seismic reflection data, Central Palo Duro Basin: Technical report

International Nuclear Information System (INIS)

1986-11-01

Seismic reflection data from the Central Palo Duro Basin, Texas, were studied to identify and characterize geologic structure, potential hydrocarbon traps, and anomalies suggesting adverse features such as salt dissolution or diapirism. The data included seismic reflection data, geologic and geophysical data controlled by Stone and Webster Engineering Corporation, and data from the literature. These data comprised approximately 590 line-mi of seismic profiles over approximately 4000 mi 2 , plus well logs from 308 wells. The study addressed the section from shallow reflectors down to basement. Structural contour maps were prepared for the Upper San Andres, Near Top of Glorieta, Wolfcamp, and Precambrian horizons. Isopach maps were prepared for intervals between the Upper and Lower San Andres and between the Upper San Andres and the Wolfcamp. Interpretation indicates southeasterly dips in the northwest part of the mapped area and southwesterly dips in the southwest part. Geologic structures show a generally northwest alignment. Faults at the Precambrian level and geologic structures show a generally northwest alignment. Faulting in the area is largely limited to the Precambrian, but interpretation is uncertain. Evidence of post-Wolfcampian faulting is not recognized. Seismic data delineating the San Andres section indicate a stable section throughout the area. Anomalous reflection events possibly associated with subsurface salt dissolution were seen at the 800- to 1200-ft level in Swisher County. Other anomalies include an overthickened zone northwest of Westway and carbonate buildup in the Wolfcamp and Pennsylvanian in Randall County. Mississippian to Middle Pennsylvanian diastrophism resulting in the Amarillo Uplift and Matador Arch is not manifested structurally in the central Palo Duro Basin. Subsidence or gentle uplift contributed to some structural deformation

Elaboración y aplicación de la guía didáctica de estrategias metodológicas de motricidad fina deditos a trabajar para desarrollar la escritura en los niños y niñas de primer año de educación básica paralelo “A” del Jardín de infantes Dr. Camilo Gallegos Domínguez de la parroquia San Andrés del cantón Guano provincia de Chimborazo en el año lectivo 2013 2014.

OpenAIRE

Martha Cecilia, Lozano Sànchez

2015-01-01

Esta investigación se la realizó con los niños y niñas de primera año de Educación Básica paralelo “A”, del Jardín de Infantes Dr. Camilo Gallegos Domínguez de la Parroquia San Andrés del Cantón Guano Provincia de Chimborazo, se evidenció que existe una gran deficiencia metodológica de motricidad fina, que se evidencia en el momento de ejecutar sus rasgos caligráficos, el objetivo fundamental es ayudar al niño a superar este problema. Se ha buscado información en relación a las dos variables,...

Exploration, Invention and Imagination: The Myth of Icarus in André Bazin

NARCIS (Netherlands)

Joret, B.; Viegas, S.; Teixeira, M.T.

2015-01-01

In this essay, I intend to elucidate the ontological implications of André Bazin’s integral realism: "a recreation of the world in its own image." The connection that he draws between the world and the image is in harmony with his mythical project for cinema, which argues that an imaginative myth

Geology and permian paleomagnetism of the Val-di-Non area W. Dolomites, N. Italy

NARCIS (Netherlands)

van Hilten, D.

1960-01-01

During the summers of 1957 till 1959 geological investigations were carried out in the western part of the Dolomites (southern Alps), where these are separated from the central Alps by the Judicaria fault. A long time before the principal displacements occurred along this fault - late oligocene -

Geology and permian paleomagnetism of the Val-di-Non area W. Dolomites, N. Italy

NARCIS (Netherlands)

Hilten, D. van

1960-01-01

During the summers of 1957 till 1959 geological investigations were carried out in the western part of the Dolomites (southern Alps), where these are separated from the central Alps by the Judicaria fault. A long time before the principal displacements occurred along this fault - late oligocene

Magnetite-apatite-dolomitic rocks of Ust-Chulman (Aldan shield, Russia): Seligdar-type carbonatites?

Science.gov (United States)

Prokopyev, Ilya R.; Doroshkevich, Anna G.; Redina, Anna A.; Obukhov, Andrey V.

2018-04-01

The Ust-Chulman apatite ore body is situated within the Nimnyrskaya apatite zone at the Aldan shield in Russia. The latest data confirm the carbonatitic origin of the Seligdar apatite deposit (Prokopyev et al. in Ore Geol Rev 81:296-308, 2017). The results of our investigations demonstrate that the magnetite-apatite-dolomitic rocks of the Ust-Chulman are highly similar to Seligdar-type dolomitic carbonatites in terms of the mineralogy and the fluid regime of formation. The ilmenite and spinel mineral phases occur as solid solutions with magnetite, and support the magmatic origin of the Ust-Chulman ores. The chemical composition of REE- and SO3-bearing apatite crystals and, specifically, monazite-(Ce) mineralisation and the formation of Nb-rutile, late hydrothermal sulphate minerals (barite, anhydrite) and haematite are typical for carbonatite complexes. The fluid inclusions study revealed similarities to the evolutionary trend of the Seligdar carbonatites that included changes of the hydrothermal solutions from highly concentrated chloride to medium-low concentrated chloride-sulphate and oxidized carbonate-ferrous.

Tallinna Lennujaama kauba- ja tolliterminaal. Lennujaama 2, Tallinn / Andres Põime

Index Scriptorium Estoniae

Põime, Andres

1998-01-01

Kaubateeninduskeskuse puhul on tegemist suure, plaanimõõtudes 36x102 meetrise metallkonstruktsioonis, sandwich tüüpi paneelidega kaetud laohoonega, kus ühelt poolt tuuakse tollitav kaup lennukitelt sisse ja teiselt poolt viiakse tollitud kaup välja. Peatöövõtja : Normanni Linnagrupi AS. Ehitaja : Merko. Peaprojekteerija : K-Projekt. Arhitektuurne lahendus : Stuudio 3. Arhitekt Andres Põime ; töögrupp Vivian Oruvee, Tiiu Raudsepp, Reet Põime. Projekt 1997-98, valmis 1998.

Mida teeks tulevane kultuuriminister 500 miljoni krooniga? / interv. Andres Keil

Index Scriptorium Estoniae

2007-01-01

Suuremate erakondade kultuurispetsialistid (kultuuriministrikandidaadid) Urmas Paet, Andres Herkel, Peeter Jalakas, Indrek Saar, Jaak Allik, samuti kultuuriminister Raivo Palmaru vastavad küsimustele, mis on suurimad ohud eesti keele ja rahvuskultuuri säilimisele, milline on kultuuriministeeriumi ja -ministri portfelli staatus praeguses valitsuses, kas kultuuri rahastamine riigieelarvest on piisav, mille poolest erineb nende erakonna nägemus kultuuripoliitikast teiste erakondade omast, kuhu nad suunaksid 50, 500 miljonit, kui see oleks nende käsutuses

Olivine, dolomite and ceramic filters in one vessel to produce clean gas from biomass.

Science.gov (United States)

Rapagnà, Sergio; Gallucci, Katia; Foscolo, Pier Ugo

2018-01-01

Heavy organic compounds produced during almond shells gasification in a steam and/or air atmosphere, usually called tar, are drastically reduced in the product gas by using simultaneously in one vessel a ceramic filter placed in the freeboard and a mixture of olivine and dolomite particles in the fluidized bed of the gasifier. The content of tar in the product gas during a reference gasification test with air, in presence of fresh olivine particles only, was 8600mg/Nm 3 of dry gas. By gasifying biomass with steam at the same temperature level of 820°C in a bed of olivine and dolomite (20% by weight), and in the presence of a catalytic ceramic filter inserted in the freeboard of the fluidized bed gasifier, the level of tar was brought down to 57mg/Nm 3 of dry producct gas, with a decrease of more than two orders of magnitude. Copyright © 2017 Elsevier Ltd. All rights reserved.

La astronomía de un humanista, Juan Andrés

Directory of Open Access Journals (Sweden)

José Antonio SANDUVETE CHAVES

2009-11-01

Full Text Available RESUMEN: La páginas que siguen pretenden ofrecer una visión de conjunto del análisis que de la historia de la Astronomía realiza Juan Andrés, desde los orígenes de la humanidad hasta el siglo XVIII. Este análisis, incluido en su monumental obra Origen, progresos y estado actual de toda la literatura, destaca por su modernidad y precisión, constituyendo, por tanto, una interesante base de comparación entre la visión de la ciencia astronómica del humanismo ilustrado y la que pervive en la actualidad.ABSTRACT: The following pages attempt to offer a full view of the research into the history of astronomy made by Juan Andrés, from the beginning of human culture until the 18th century. This analysis, included in a broader work called Origen, progresos y estado de toda la literatura, stands out on account of its modern and precise ideas, thus representing an interesting knowledge base for comparing the view of astronomy during the Enlightenment with that of the present.

75 FR 38412 - Safety Zone; San Diego POPS Fireworks, San Diego, CA

Science.gov (United States)

2010-07-02

...-AA00 Safety Zone; San Diego POPS Fireworks, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary... waters of San Diego Bay in support of the San Diego POPS Fireworks. This safety zone is necessary to... San Diego POPS Fireworks, which will include fireworks presentations conducted from a barge in San...

THE EFFECT OF FISSURES IN DOLOMITE ROCK MASS ON BLASTING PROJECTS

Directory of Open Access Journals (Sweden)

Branko Božić

1989-12-01

Full Text Available Rock fractures in the form of fissures are one of more important geological features of a tectonic system. They have an effect on mechanical behaviour of rook masses exposed to the actions of surface forces. For exploitation in dolomite quarries carried out by blasting of deep shot holes it is important to know the system of fissures within a rock mass for the rock brakes along already weakened planes (the paper is published in Croatian.

Altering Reservoir Wettability to Improve Production from Single Wells

Energy Technology Data Exchange (ETDEWEB)

W. W. Weiss

2006-09-30

tests were conducted in an area of the field that has not met production expectations. The dataset on the 23 Phosphoria well surfactant soaks was updated. An analysis of the oil decline curves indicted that 4.5 lb of chemical produced a barrel of incremental oil. The AI analysis supports the adage 'good wells are the best candidates.' The generally better performance of surfactant in the high permeability core laboratory tests supports this observation. AI correlations were developed to predict the response to water-frac stimulations in a tight San Andres reservoir. The correlations maybe useful in the design of Cedar Creek Anticline surfactant soak treatments planned for next year. Nuclear Magnetic Resonance scans of dolomite cores to measure porosity and saturation during the high temperature laboratory work were acquired. The scans could not be correlated with physical measurement using either conventional or AI methods.

Andres Herkel : Venemaa esindaja ENPA presidendiks ei sobi / Haldi Ellam, Ravil Khair Al-Din

Index Scriptorium Estoniae

Ellam, Haldi

2007-01-01

Vene ajalehe Kommersant väitel on Eesti parlamendi süüdistused ENPA presidendi Rene van der Lindeni vastu seotud Mihhail Margelovi võimaliku valimisega uueks presidendiks. Kristiina Ojuland ja Andres Herkel lükkavad väite tagasi

AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences

International Nuclear Information System (INIS)

Dura, Joseph A.; Pierce, Donald J.; Majkrzak, Charles F.; Maliszewskyj, Nicholas C.; McGillivray, Duncan J.; Loesche, Mathias; O'Donovan, Kevin V.; Mihailescu, Mihaela; Perez-Salas, Ursula; Worcester, David L.; White, Stephen H.

2006-01-01

An elastic neutron scattering instrument, the advanced neutron diffractometer/reflectometer (AND/R), has recently been commissioned at the National Institute of Standards and Technology Center for Neutron Research. The AND/R is the centerpiece of the Cold Neutrons for Biology and Technology partnership, which is dedicated to the structural characterization of thin films and multilayers of biological interest. The instrument is capable of measuring both specular and nonspecular reflectivity, as well as crystalline or semicrystalline diffraction at wave-vector transfers up to approximately 2.20 A -1 . A detailed description of this flexible instrument and its performance characteristics in various operating modes are given

Primary Evaporites for the Messinian Salinity Crisis: the shallow gypsum vs. deep dolomite formation paradox solved

Science.gov (United States)

De Lange, Gert J.; Krijgsman, Wout

2014-05-01

The Messinian Salinity Crisis (MSC) is a dramatic event that took place ~ 5.9 Ma ago, and resulted in the deposition of 0.3-3 km thick evaporites at the Mediterranean seafloor. A considerable and long-lasting controversy existed on the modes of their formation. During the CIESM Almeria Workshop a consensus was reached on several aspects. In addition, remaining issues to be solved were identified, such as for the observed shallow gypsum versus deep dolostone deposits for the early phase of MSC. The onset of MSC is marked by deposition of gypsum/sapropel-like alternations, thought to relate to arid/humid climate conditions. Gypsum precipitation only occurred at marginal settings, while dolomite containing rocks have been reported from deeper settings. A range of potential explanations have been reported, most of which cannot satisfactorily explain all observations. Biogeochemical processes during MSC are poorly understood and commonly neglected. These may, however, explain that different deposits formed in shallow versus deep environments without needing exceptional physical boundary conditions for each. We present here a unifying mechanism in which gypsum formation occurs at all shallow water depths but its preservation is mostly limited to shallow sedimentary settings. In contrast, ongoing anoxic organic matter (OM) degradation processes in the deep basin result in the formation of dolomite. Gypsum precipitation in evaporating seawater takes place at 3-7 times concentrated seawater; seawater is always largely oversaturated relative to dolomite but its formation is thought to be inhibited by the presence of dissolved sulphate. Thus the conditions for formation of gypsum exclude those for the formation of dolomite and vice versa. Another process that links the saturation states of gypsum and dolomite is that of OM degradation by sulphate reduction. In stagnant deep water, oxygen is rapidly depleted through OM degradation, then sulphate becomes the main oxidant for OM

Order–disorder–reorder process in thermally treated dolomite samples

DEFF Research Database (Denmark)

Zucchini, Azzurra; Comodi, Paola; Katerinopoulou, Anna

2012-01-01

A combined powder and single-crystal X-ray diffraction analysis of dolomite [CaMg(CO3)2] heated to 1,200oC at 3 GPa was made to study the order–disorder–reorder process. The order/disorder transition is inferred to start below 1,100oC, and complete disorder is attained at approximately 1,200o......C. Twinned crystals characterized by high internal order were found in samples annealed over 1,100oC, and their fraction was found to increase with temperature. Evidences of twinning domains combined with probable remaining disordered portions of the structure imply that reordering processes occur during...

Ecrire à la suite de : Andrée Lacelle, Andrée Christensen et Jacques Flamand, Paul Savoie et Dyane Léger

Directory of Open Access Journals (Sweden)

Catherine Parayre

2012-05-01

Full Text Available « Ecrire à la suite de » est un procédé d’écriture courant dans la littérature, qu’il s’agisse de mettre en relief l’intertextualité de l’œuvre (par exemple, en incluant des citations, de s’adonner à un travail basé sur l’intermédialité (par exemple, dans un texte rédigé à partir de photographies ou encore d’écrire à quatre mains, lorsqu’un des deux auteurs ajoute son texte à celui du partenaire d’écriture. Ne faisant pas exception, les littératures francophones du Canada pratiquent tout aussi fréquemment cette écriture de l’après. Le présent article en examinera quelques exemples dans des œuvres de nature introspective : La lumière et l’heure : poèmes et carnets (2004 d’Andrée Lacelle, avec des tableaux de Réjine Halimi ; Lithochronos ou le premier vol de la pierre (1999 d’Andrée Christensen et Jacques Flamand, avec des photographies de Christensen ; et L’incendiaire (2008 de Paul Savoie et Dyane Léger. L’analyse montrera que l’écriture « à la suite de », aussi variées qu’en soient les manifestations, non seulement met en évidence la présence de l’auteur dans ces textes, mais a aussi pour résultat, dans ces œuvres méditatives, de dédramatiser et d’amenuiser l’intensité de la réflexion existentielle.

André Gide, Gide & Amrouche. Correspondance (1928-1950)

OpenAIRE

Amadessi, Veronica

2016-01-01

En 1928, le jeune Jean el-Mouhoub Amrouche captive l’attention d’André Gide dans une lettre qu’il lui adresse personnellement. À cette époque, la réputation de l’auteur de L’Immoraliste ne cesse de grandir, alors que l’expéditeur n’est qu’un «brillant» normalien inconnu au grand public. Il s’agit toutefois d’un jeune kabyle aux idées bien précises, qui exprime, dans cette première missive, sa volonté de se faire le porte-parole de l’identité kabyle tout en préservant son amour pour la France....

Dating of aragonite and dolomite from Devil's cave - SP, by dosimetric thermoluminescent method (DTL) and ESR

International Nuclear Information System (INIS)

Tatumi, S.H.

1987-01-01

We have investigated TL (Thermoluminescence) and ESR (electron spin resonance) properties of aragonite and dolomite found at ''Caverna do Diabo (Devil's cave)'' in the state of Sao Paulo to determine the ages of these geological materials. The aragonite, which is not a thermoluminescent material, shows one ESR signal whit g = 2.003. We obtained the age of 1.1 x 10 5 years and the growth rate of 1 μ m/year by the sample calibration with additional Y irradiation. The dolomite gives a TL glow curve with three distinct peaks at 261, 334 and 395 0 C. We found that the fit for the TL glow curve to second-order kinetics can be considerered as very acceptable. Using the second TL peak we obtained the age of 9.4 x 10 5 years and the compatible values of the activation energy (1.90 ± 0,07 eV) by the following methods: Hyperbolic heating, isothermal decay and fractional glow technique. We observed many ESR absorption signals in the dolomite. Three principal signal com g = 2.002, 2.003 and 2.005 were studied. We found that the first and second ESR signals were atributed to the CO 2 - and/or CO 3 3- centers and the last to the CO 3 - centers, and observed that the first ESR signal might related with the second TL peak and the TL sensitivity were associated with the concentration of Mn 2+ [pt

Tõnu Anton kahtlustab linnaisasid omakasu jahtimises / Tõnu Anton, Andres Kõiv, Ando Hagel ; interv. Ulis Guth

Index Scriptorium Estoniae

Anton, Tõnu, 1942-

2004-01-01

Võru linnavolikogu opositsiooni kuuluv keskerakondlane Tõnu Anton kritiseerib sotsiaalabitalituse ruumide remondirahade kasutamist ja kahtlustab linnavalitsust riigihangete käigus raha kõrvaldamises. Linnapea Ando Hagel ja abilinnapea Andres Kõiv lükkavad süüdistused tagasi

Efecto del uso predominante de fungicidas sistémicos para el control de Sigatoka negra (Mycosphaerella Fijiensis Morelet en el área foliar del banano

Directory of Open Access Journals (Sweden)

MSc. José Quevedo Guerrero

2018-04-01

Full Text Available Sigatoka negra (Mycosphaerellafijiensis Morelet,enfermedad que afecta la capacidad fotosintética de la planta de banano en zonas donde la humedad relativa es alta, y favorece sudesarrollo, hacendel sur del Guayas y del norte de la provincia de El Oro, sus hábitats favoritos, han llevado a los productores al uso indiscriminado de los fungicidas existentes en el mercado. Actualmente existen estrategias de control con el uso de fungicidas protectantes y sistémicos que contribuyen a disminuir los daños ocasionados por este hongo. Este trabajo plantea analizar la eficiencia de los fungicidas más usados comúnmente por los productores en cuatro fincas bananeras para estimar su eficiencia mediante el preaviso biológico en plantas prontas a la floración, utilizando un diseño experimental de bloques al azar con pruebas de Tukey al 0.05 de confiabilidad. Los resultados indicaron que las fincas San Andrés 1-2 y San Andrés 3 ubicadas en la zona Balao, y que usaron en sus programas de control de Sigatoka negra fungicidas protectantes y sistémicos en rotación y mezcla, además de aplicaciones de abonos foliares, presentaron valores estadísticamente diferentes a las otras fincas que aplicaron una mayor cantidad de ciclos con fungicidas sistémicos. Las fincas Elizabeth 2 y La Italia presentaron estados evolutivos más altos en las hojas más jóvenes y una emisión foliar más lenta. Se puede concluir que las fincas San Andrés 1-2 y San Andrés 3 mostraron diferencias significativas en el número de hojas sanas a la cosecha, estados evolutivos y emisión foliar, con un mejor estado fitosanitario.

Reactivity of dolomite in water-saturated supercritical carbon dioxide: Significance for carbon capture and storage and for enhanced oil and gas recovery

International Nuclear Information System (INIS)

Wang Xiuyu; Alvarado, Vladimir; Swoboda-Colberg, Norbert; Kaszuba, John P.

2013-01-01

Highlights: ► Dolomite reactivity with wet and dry supercritical CO 2 were evaluated. ► Dolomite does not react with dry CO 2 . ► H 2 O-saturated supercritical CO 2 dissolves dolomite and precipitates carbonate mineral. ► Temperature/reaction time control morphology and extent of carbonate mineralization. ► Reaction with wet CO 2 may impact trapping, caprock integrity, and CCS/EOR injectivity. - Abstract: Carbon dioxide injection in porous reservoirs is the basis for carbon capture and storage, enhanced oil and gas recovery. Injected carbon dioxide is stored at multiple scales in porous media, from the pore-level as a residual phase to large scales as macroscopic accumulations by the injection site, under the caprock and at reservoir internal capillary pressure barriers. These carbon dioxide saturation zones create regions across which the full spectrum of mutual CO 2 –H 2 O solubility may occur. Most studies assume that geochemical reaction is restricted to rocks and carbon dioxide-saturated formation waters, but this paradigm ignores injection of anhydrous carbon dioxide against brine and water-alternating-gas flooding for enhanced oil recovery. A series of laboratory experiments was performed to evaluate the reactivity of the common reservoir mineral dolomite with water-saturated supercritical carbon dioxide. Experiments were conducted at reservoir conditions (55 and 110 °C, 25 MPa) and elevated temperature (220 °C, 25 MPa) for approximately 96 and 164 h (4 and 7 days). Dolomite dissolves and new carbonate mineral precipitates by reaction with water-saturated supercritical carbon dioxide. Dolomite does not react with anhydrous supercritical carbon dioxide. Temperature and reaction time control the composition, morphology, and extent of formation of new carbonate minerals. Mineral dissolution and re-precipitation due to reaction with water-saturated carbon dioxide may affect the contact line between phases, the carbon dioxide contact angle, and the

The determination of lead, zinc, and magnesium in dolomite and its benefication products by use of x-ray-fluorescence spectrometry

International Nuclear Information System (INIS)

Jacobs, J.J.

1985-01-01

An investigation was undertaken on the development of fast, simple, and accurate methods of analysis for lead and zinc in tailings and middlings from dolomite, and for lead, zinc, and magnesium in concentrates obtained from dolomite. A pressed-powder technique and X-ray-fluorescence spectrometry (XRFS) were used. Good agreement was found between the XRFS values for lead and zinc in low concentrations and the values obtained by other techniques of analysis when the calibration for the XRFS method was effected by the use of synthetic standards comprising lead and zinc oxides in a dolomite matrix. For high concentrations of the analytes, all the oxides and sulphides of lead and zinc in the samples had to be converted to the sulphate form, and a matrix correction had to be applied to the assigned values of the oxide calibration standards. The lower limits of detection for lead, zinc, and magnesium were 0,004, 0,003, and 0,18 per cent respectively. The recommended methods are detailed in two appendices

Chabazite and dolomite formation in a dolocrete profile: An example of a complex alkaline paragenesis in Lanzarote, Canary Islands

Science.gov (United States)

Alonso-Zarza, Ana M.; Bustamante, Leticia; Huerta, Pedro; Rodríguez-Berriguete, Álvaro; Huertas, María José

2016-05-01

This paper studies the weathering and soil formation processes operating on detrital sediments containing alkaline volcanic rock fragments of the Mirador del Río dolocrete profile. The profile consists of a lower horizon of removilised weathered basalts, an intermediate red sandy mudstones horizon with irregular carbonate layers and a topmost horizon of amalgamated carbonate layers with root traces. Formation occurred in arid to semiarid climates, giving place to a complex mineralogical association, including Mg-carbonates and chabazite, rarely described in cal/dolocretes profiles. Initial vadose weathering processes occurred in the basalts and in directly overlying detrital sediments, producing (Stage 1) red-smectites and dolomicrite. Dominant phreatic (Stage 2) conditions allowed precipitation of coarse-zoned dolomite and chabazite filling porosities. In Stages 3 and 4, mostly pedogenic, biogenic processes played an important role in dolomite and calcite accumulation in the profile. Overall evolution of the profile and its mineralogical association involved initial processes dominated by alteration of host rock, to provide silica and Mg-rich alkaline waters, suitable for chabazite and dolomite formation, without a previous carbonate phase. Dolomite formed both abiogenically and biogenically, but without a previous carbonate precursor and in the absence of evaporites. Dominance of calcite towards the profile top is the result of Mg/Ca decrease in the interstitial meteoric waters due to decreased supply of Mg from weathering, and increased supply of Ca in aeolian dust. Meteoric origin of the water is confirmed by C and O isotope values, which also indicate lack of deep sourced CO2. The dolocrete studied and its complex mineral association reveal the complex interactions that occur at surface during weathering and pedogenesis of basalt-sourced rocks.

Crystal structure study of a cobaltoan dolomite from Kolwezi, Democratic Republic of Congo

Directory of Open Access Journals (Sweden)

Natale Perchiazzi

2015-03-01

Full Text Available A structural study has been undertaken on a cobaltoan dolomite, with chemical formula CaMg0.83Co0.17(CO32 (calcium magnesium cobalt dicarbonate, from Kolwezi, Democratic Republic of Congo. Pale-pink euhedral cobaltoan dolomite was associated with kolwezite [(Cu1.33Co0.67(CO3(OH2] and cobaltoan malachite [(Cu,Co2(CO3(OH2]. A crystal with a Co:Mg ratio of 1:5.6 (SEM/EDAX measurement, twinned on (11 -2 0 was used for crystal structural refinement. The refinement of the structural model of Reeder & Wenk [Am. Mineral. (1983, 68, 769–776; Ca at site 3a with site symmetry -3; Mg site at site 3b with site symmetry -3; C at site 6c with site symmetry 3; O at site 18f with site symmetry 1] showed that Co is totally incorporated in the Mg site, with refined occupancy Mg0.83Co0.17, which compares with Mg0.85Co0.15 from chemical data. The Co substitution reflects in the expansion of the cell volume, with a pronounced increasing of the c cell parameter.

Who Is DeAndre? Tapping the Power of Popular Culture in Literacy Learning

Science.gov (United States)

Gainer, Jesse

2008-01-01

Gainer talks about the importance of connecting students' background knowledge, experiences, and interests to curricular goals. He highlights the voice of DeAndre, an eighth-grade boy in special education classes, whose participation in an after-school club led to the creation of a video. According to Gainer, "[W]hen given the opportunity to…

Indústria, ordenamento do território e transportes – a contribuição de André Fischer

Directory of Open Access Journals (Sweden)

Áurea Breitbach

2009-03-01

Full Text Available Indústria, ordenamento do território e transportes – a contribuição de André Fischer, Organização Olga Lúcia C. Firkowski e Eliseu S. Sposito, Editora Expressão Popular, 2008, 160 p.Este livro é uma iniciativa conjunta dos Programas de Pós-Graduação em Geografia da Universidade Federal do Paraná e da Universidade Estadual Paulista/Presidente Prudente. Conforme os organizadores, a intenção foi publicar um livro que homenageasse André Fischer e, para tanto, foram reunidos diversos textos escrit...

High-resolution sequence stratigraphy and continental environmental evolution: An example from east-central Argentina

Science.gov (United States)

Beilinson, Elisa; Veiga, Gonzalo D.; Spalletti, Luis A.

2013-10-01

The aims of this contribution is to establish a high-resolution sequence stratigraphic scheme for the continental deposits that constitute the Punta San Andrés Alloformation (Plio-Pleistocene) in east-central Argentina, to analyze the basin fill evolution and to identify and assess the role that extrinsic factors such as climate and sea-level oscillations played during evolution of the unit. For the high-resolution sequence stratigraphical study of the Punta San Andrés Alloformation, high- and low-accommodation system tracts were defined mainly on the basis of the architectural elements present in the succession, also taking into account the relative degree of channel and floodplain deposits. Discontinuities and the nature of depositional systems generated during variations in accommodation helped identify two fourth-order high-accommodation system tracts and two fourth-order low-accommodation system tracts. At a third-order scale, the Punta San Andrés Alloformation may be interpreted as the progradation of continental depositional systems, characterized by a braided system in the proximal areas, and a low-sinuosity, single-channel system in the distal areas, defined by a high rate of sediment supply and discharge peaks which periodically flooded the plains and generated high aggradation rates during the late Pliocene and lower Pleistocene.

78 FR 19103 - Safety Zone; Spanish Navy School Ship San Sebastian El Cano Escort; Bahia de San Juan; San Juan, PR

Science.gov (United States)

2013-03-29

...-AA00 Safety Zone; Spanish Navy School Ship San Sebastian El Cano Escort; Bahia de San Juan; San Juan... temporary moving safety zone on the waters of Bahia de San Juan during the transit of the Spanish Navy... Channel entrance, and to protect the high ranking officials on board the Spanish Navy School Ship San...

Full-scale laboratory drilling tests on sandstone and dolomite. Final report

Energy Technology Data Exchange (ETDEWEB)

Black, A. D.; Green, S. J.; Rogers, L. A.

1977-08-01

Full-scale laboratory drilling experiments were performed under simulated downhole conditions to determine what effect changing various drilling parameters has on penetration rate. The two rock types, typical of deep oil and gas reservoirs, used for the tests were Colton Sandstone and Bonne Terre Dolomite. Drilling was performed with standard 7/sup 7///sub 8/ inch rotary insert bits and water base mud. The results showed the penetration rate to be strongly dependent on bit weight, rotary speed and borehole mud pressure. There was only a small dependence on mud flow rate. The drilling rate decreased rapidly with increasing borehole mud pressure for borehole pressures up to about 2,000 psi. Above this pressure, the borehole pressure and rotary speeds had a smaller effect on penetration rate. The penetration rate was then dependent mostly on the bit weight. Penetration rate per horsepower input was also shown to decrease at higher mud pressures and bit weights. The ratio of horizontal confining stress to axial overburden stress was maintained at 0.7 for simulated overburden stresses between 0 and 12,800 psi. For this simulated downhole stress state, the undrilled rock sample was within the elastic response range and the confining pressures were found to have only a small or negligible effect on the penetration rate. Visual examination of the bottomhole pattern of the rocks after simulated downhole drilling, however, revealed ductile chipping of the Sandstone, but more brittle behavior in the Dolomite.

Carlos Hugo Molina Saucedo. Andrés Ibáñez, un caudillo para el siglo XXI. La Comuna de Santa Cruz de la Sierra de 1876; Andrey Schelchkov. Andrés Ibáñez y la Revolución de la Igualdad en Santa Cruz: primer ensayo de federalismo en Bolivia, 1876-1877

Directory of Open Access Journals (Sweden)

Clayton Mendonça Cunha Filho

2014-11-01

Full Text Available Carlos Hugo Molina Saucedo. Andrés Ibáñez, un caudillo para el siglo XXI. La Comuna de Santa Cruz de la Sierra de 1876Andrey Schelchkov. Andrés Ibáñez y la Revolución de la Igualdad en Santa Cruz: primer ensayo de federalismo en Bolivia, 1876-1877

Compact High Resolution SANS using very cold neutrons (VCN-SANS)

International Nuclear Information System (INIS)

Kennedy, S.; Yamada, M.; Iwashita, Y.; Geltenbort, P.; Bleuel, M.; Shimizu, H.

2011-01-01

SANS (Small Angle Neutron Scattering) is a popular method for elucidation of nano-scale structures. However science continually challenges SANS for higher performance, prompting exploration of ever-more exotic and expensive technologies. We propose a compact high resolution SANS, using very cold neutrons, magnetic focusing lens and a wide-angle spherical detector. This system will compete with modern 40 m pinhole SANS in one tenth of the length, matching minimum Q, Q-resolution and dynamic range. It will also probe dynamics using the MIEZE method. Our prototype lens (a rotating permanent-magnet sextupole), focuses a pulsed neutron beam over 3-5 nm wavelength and has measured SANS from micelles and polymer blends. (authors)

Lineaarse kunstiajaloo aeg on otsas / Edit András ; intervjueerinud R[eet] V[arblane

Index Scriptorium Estoniae

András, Edit

2010-01-01

Vestlus ungari kunstiteoreetiku- ja ajaloolase Edit Andrásiga, kes osales Tallinnas USA Clarki instituudi ja EKA Kunstiteaduste Instituudi seminaril, kus arutati Kesk- ja Ida-Euroopa kunstiajaloo kirjutamisviiside üle. Seminari tekkimisest, kokkusaamise põhjustest, seminari järeldustest, Eesti ja Ungari kunstiajaloo kirjutamise erinevatest põhimõtetest jm.

Mis juhtus Andres Lapeteusega? : error'ist kõrgklassi homo soveticus'e näitel / Liisa Kaljula

Index Scriptorium Estoniae

Kaljula, Liisa, 1982-

2014-01-01

Autor analüüsib 2014. a. Tallinna Semiosalongi loengute sarja põhiteema - error'i mõiste avamiseks ühe inimliigi kujunemislugu - Eesti filmiklassikast tuntud tegelaskuju Andres Lapeteuse tõusu ning langust homo soveticus'ena

Krypton-81 in groundwater of the Culebra Dolomite near the Waste Isolation Pilot Plant, New Mexico.

Science.gov (United States)

Sturchio, Neil C; Kuhlman, Kristopher L; Yokochi, Reika; Probst, Peter C; Jiang, Wei; Lu, Zheng-Tian; Mueller, Peter; Yang, Guo-Min

2014-05-01

The Waste Isolation Pilot Plant (WIPP) in New Mexico is the first geologic repository for disposal of transuranic nuclear waste from defense-related programs of the US Department of Energy. It is constructed within halite beds of the Permian-age Salado Formation. The Culebra Dolomite, confined within Rustler Formation evaporites overlying the Salado Formation, is a potential pathway for radionuclide transport from the repository to the accessible environment in the human-disturbed repository scenario. Although extensive subsurface characterization and numerical flow modeling of groundwater has been done in the vicinity of the WIPP, few studies have used natural isotopic tracers to validate the flow models and to better understand solute transport at this site. The advent of Atom-Trap Trace Analysis (ATTA) has enabled routine measurement of cosmogenic (81)Kr (half-life 229,000 yr), a near-ideal tracer for long-term groundwater transport. We measured (81)Kr in saline groundwater sampled from two Culebra Dolomite monitoring wells near the WIPP site, and compared (81)Kr model ages with reverse particle-tracking results of well-calibrated flow models. The (81)Kr model ages are ~130,000 and ~330,000 yr for high-transmissivity and low-transmissivity portions of the formation, respectively. Compared with flow model results which indicate a relatively young mean hydraulic age (~32,000 yr), the (81)Kr model ages imply substantial physical attenuation of conservative solutes in the Culebra Dolomite and provide limits on the effective diffusivity of contaminants into the confining aquitards. Copyright © 2014 Elsevier B.V. All rights reserved.

Industrial practices

International Nuclear Information System (INIS)

Velasquez Torrez, Patricia Irma

1999-01-01

This document reports the industrial practices carried out by the author viewing the requirements fulfilled for obtention the academic degree in chemical engineering of the San Andres University - Bolivia

Porosity development in the Copper Ridge Dolomite and Maynardville Limestone, Bear Creek Valley and Chestnut Ridge, Tennessee

International Nuclear Information System (INIS)

Goldstrand, P.M.; Menefee, L.S.; Dreier, R.B.

1995-12-01

Matrix porosity data from deep core obtained in Bear Creek Valley indicate that porosities in the Maynardville Limestone are lithology and depth dependent. Matrix porosities are greater in the Cooper Ridge Dolomite than in the Maynardville Limestone, yet there is no apparent correlation with depth. Two interrelated diagenetic processes are the major controlling factors on porosity development in the Copper Ridge Dolomite and Maynardville Limestone; dissolution of evaporate minerals and dedolomitization. Both of these diagenetic processes produce matrix porosities between 2.1 and 1.3% in the Copper Ridge Dolomite and upper part of the Maynardville Limestone (Zone 6) to depths of approximately 600 ft bgs. Mean matrix porosities in Zones 5 through 2 of the Maynardville Limestone range from 0.8 to 0.5%. A large number of cavities have been intersected during drilling activities in nearly all zones of the Maynardville Limestone in Bear Creek Valley. Therefore, any maynardville Limestone zone within approximately 200 ft of the ground surface is likely to contain cavities that allow significant and rapid flow of groundwater. Zone 6 could be an important stratigraphic unit in the Maynardville Limestone for groundwater flow and contaminant transport because of the abundance of vuggy and moldic porosities. There are large variations in the thickness and lithology in the lower part of the Maynardville (Zones 2, 3, and 4 in the Burial Grounds region). The direction and velocity of strike-parallel groundwater flow may be altered in this area within the lower Maynardville Limestone

Effect of SO2 Dry Deposition on Porous Dolomitic Limestones

Directory of Open Access Journals (Sweden)

Florica Doroftei

2010-01-01

Full Text Available The present study is concerned with the assessment of the relative resistance of a monumental dolomitic limestone (Laspra – Spain used as building material in stone monuments and submitted to artificial ageing by SO2 dry deposition in the presence of humidity. To investigate the protection efficiency of different polymeric coatings, three commercially available siloxane-based oligomers (Lotexan-N, Silres BS 290 and Tegosivin HL 100 and a newly synthesized hybrid nanocomposite with silsesquioxane units (TMSPMA were used. A comparative assessment of the data obtained in this study underlines that a better limestone protection was obtained when treated with the hybrid nanocomposite with silsesquioxane units.

76 FR 45693 - Safety Zone; San Diego POPS Fireworks, San Diego, CA

Science.gov (United States)

2011-08-01

...-AA00 Safety Zone; San Diego POPS Fireworks, San Diego, CA AGENCY: Coast Guard, DHS. ACTION: Temporary... San Diego Bay in support of the San Diego POPS Fireworks. This safety zone is necessary to provide for... of the waterway during scheduled fireworks events. Persons and vessels will be prohibited from...

Arturo Andrés Roig, lector de Spinoza Arturo Andrés Roig, Spinoza Reader

Directory of Open Access Journals (Sweden)

Gerardo Oviedo

2010-06-01

Full Text Available La categoría spinoziana de conatus ocupa un puesto central en la arquitectónica discursiva de la filosofía práctica de Arturo Andrés Roig. Se trata de un fundamento previo del saber práctico-moral que oficia de figura explicativa originaria, pues el conatus concierne a una dimensión primaria de los entes. Su status teórico no se reduce por tanto a reconocer un aspecto antropológico entre otros, sino que adquiere un carácter vertebrador en el conjunto de las estrategias de fundamentación de la idea de "moral emergente" propuesta por nuestro filósofo. Nosotros estimamos que la condición ontológica del conatus es una instancia determinante de los planteos éticos y políticos de Arturo Roig. Dicha inflexión spinozista tan patente, sin embargo, no es tenida suficientemente en cuenta en algunas lecturas especializadas de la Argentina. En consecuencia, nos proponemos en primer término destacar la función constructiva que ese momento spinoziano posee en el pensamiento del maestro mendocino, ciñéndonos a un tratamiento de los textos en donde esa fuerza conceptual se torna más visible, sin excluir por cierto otros tratamientos concomitantes. Ello nos permitirá, en un segundo nivel más historiográfico de análisis, revalorar la recepción de Spinoza en los escritos de Arturo Roig.The Spinoza conatus category occupies a central place in the architectural discourse of practical philosophy of Arturo Andres Roig. This is a preliminary basis of practical knowledge and moral figure that offers originating explanation, as the conatus concerns a primary dimension of entities. Its theoretical status is not reduced only to recognizing anthropological aspect among others, but acquires a backbone in the set of strategies to substantiate the idea of "emerging moral" given by our philosopher. We believe that the ontological status is an instance of conatus determinant of ethical and political layout of Arturo Roig. Spinoza said turning so clearly

33 CFR 165.754 - Safety Zone: San Juan Harbor, San Juan, PR.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Safety Zone: San Juan Harbor, San Juan, PR. 165.754 Section 165.754 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND... Zone: San Juan Harbor, San Juan, PR. (a) Regulated area. A moving safety zone is established in the...

The genesis of the ore hosting 'dolomitic marble' in the Bayan Obo deposit, Inner Mongolia, China: constrained by isotopic results

International Nuclear Information System (INIS)

Ding Tiping; Tian Shihong; Wang Defang; Jiang Shaoyong; Bai Ruimei

2003-01-01

The Bayan Obo Fe-REE-Nb ore deposit, Inner Mongolia, China is a super large REE deposit. This deposit attracts attentions of many geologists and geochemists for its unique geological characters and geotectonic background. However, there are quite a number of controversies on various aspects of its genesis, such as when the ore deposit was formed, where the ore forming materials came from and what conditions and geotectonic environment the deposit was formed. Among them, the genesis of ore bearing 'dolomitic marble' is a focus point of debating. isotopic methods are important tools for study on ore deposits. Therefore, supplemental stable isotope investigation was undertaken in this study to reach more information on the forming conditions of 'dolomitic marble'. The high contents of REE and Nb, the REE distribution pattern, the low initial 87 Sr/ 86 Sr ratio and low δ 30 Si values of trace silica in 'dolomitic marble' all indicate its magmatic origin. The high δ 18 O values of carbonate and silicate minerals, and the relatively high δ 34 S values indicate that this rock had experienced isotopic exchange with sea water, implying their submarine volcanic origin. The δ 13 C values observed in carbonate and silicate minerals can also be explained by carbonatite assimilated by oceanic carbonate. Therefore, based on its isotopic characters, the 'dolomitic marble' is more likely of volcanic carbonatite rock formed during middle Proterozoic era. (authors)

POTENTIALLY UNSTABLE SLOPE ABOVE ORE PROCESSING PLANT IN THE "OČURA" DOLOMITE QUARRY (LEPOGLAVA, NORTH CROATIA

Directory of Open Access Journals (Sweden)

Karlo Braun

1993-12-01

Full Text Available The complex engineering investigation, in the nearest surroun-dig of the conditionally stable high slope, close to ore processing facilities in the dolomite quarry »Očura« near Lepoglava (North Croatia, was carried out. Studying the tectonic features of the rock mass, discontinuities referent to the slope stability, was found out. Rock fragment size was measured and data processed using statistical design. According to rock fragment mean values, velocity of the longitudinal seismic waves was predicted. This values was compared with velocities of the longitudinal seismic waves, determined using gcophisical refraction seismic method. Physical and mechanical properties of the dolomite rock mass, considering longitudinal and transversal seismic wave velocities, and »RMR«-classification was assesed. All the results indicate, that the slope above the ore processing facilities should be consider as conditionally stable, with real probability to get unstable under the vibrations caused by blasting, during the exploitation in the field, close behind the investigated slope (the paper is published in Croatian.

Summary of Research through Phase II/Year 2 of Initially Approved 3 Phase/3 Year Project - Establishing the Relationship between Fracture-Related Dolomite and Primary Rock Fabric on the Distribution of Reservoirs in the Michigan Basin

Energy Technology Data Exchange (ETDEWEB)

G. Grammer

2007-09-30

This final scientific/technical report covers the first 2 years (Phases I and II of an originally planned 3 Year/3 Phase program). The project was focused on evaluating the relationship between fracture-related dolomite and dolomite constrained by primary rock fabric in the 3 most prolific reservoir intervals in the Michigan Basin. The characterization of select dolomite reservoirs was the major focus of our efforts in Phases I and II of the project. Structural mapping and log analysis in the Dundee (Devonian) and Trenton/Black River (Ordovician) suggest a close spatial relationship among gross dolomite distribution and regional-scale, wrench fault-related NW-SE and NE-SW structural trends. A high temperature origin for much of the dolomite in these 2 studied intervals (based upon fluid inclusion homogenization temperatures and stable isotopic analyses,) coupled with persistent association of this dolomite in reservoirs coincident with wrench fault-related features, is strong evidence for these reservoirs being influenced by hydrothermal dolomitization. In the Niagaran (Silurian), there is a general trend of increasing dolomitization shelfward, with limestone predominant in more basinward positions. A major finding is that facies types, when analyzed at a detailed level, are directly related to reservoir porosity and permeability in these dolomites which increases the predictability of reservoir quality in these units. This pattern is consistent with our original hypothesis of primary facies control on dolomitization and resulting reservoir quality at some level. The identification of distinct and predictable vertical stacking patterns within a hierarchical sequence and cycle framework provides a high degree of confidence at this point that the results should be exportable throughout the basin. Much of the data synthesis and modeling for the project was scheduled to be part of Year 3/Phase III, but the discontinuation of funding after Year 2 precluded those efforts

Convenio "Andres Bello:" Informe Final [de la] Segunda Reunion de Ministros de Educacion de la Region Andina ("Andres Bello" Agreement: Final Report of the Second Meeting of the Andean Region Ministers of Education).

Science.gov (United States)

Ministros de Educacion de la Region Andina, Lima (Peru).

This final report of the second meeting of the Andean Region Ministers of Education subscribing to the Andres Bello Agreement on education and culture contains a resume of the individual sessions and the proposals approved during that meeting. The proposals cover various educational problems and issues and begin with the Declaration of Lima which…

Investigation of the interaction of Greek dolomitic marble with metal aqueous solutions using Rutherford backscattering and X-ray photoelectron spectroscopy

International Nuclear Information System (INIS)

Godelitsas, A.; Kokkoris, M.; Misaelides, P.

2005-01-01

The interaction of dolomitic marble from Thassos Island (northern Aegean sea, Greece) with Co 2+ -, Cd 2+ -, Pb 2+ - and Cr 3+ - aqueous solutions (metal concentration: 1000 mgL -1 ) was investigated using Rutherford backscattering (RBS) and X-ray photoelectron spectroscopy (XPS). The initial material as well as the interaction products were also characterized by scanning electron microscopy (SEM/EDS), radioisotope induced X-ray fluorescence analysis (RI-XRFA), powder X-ray diffraction (Powder-XRD) and Fourier transform infra-red spectroscopy (FT-IR). The contact time of the samples with the aqueous solutions was one week and took place under ambient temperature. To our knowledge, the sorption of the above mentioned metals with dolomite (CaMg(CO 3 ) 2 ) has not yet been presented in the literature and the only data available concern the adsorption of Ca, Mg and Nd from NaCl solutions. The Thassos island dolomitic marble is a snow-white homogeneous carbonate metamorphic rock, with fine physicochemical and mechanical properties, currently used as natural building stone in many parts of the world (see http://www.thassosmarble.com), This dolomite-bearing material was also extensively used in the past as construction material of many .classical Greek and Roman sculptures and architectural elements; in 301 AD the Roman emperor Diocletian included 'Thassian marble' in the list of the 19 most expensive and important 'marbles' produced in the imperial quarries. Previous literature presented the isotopic analysis(δ 13 C, δ 18 O) and EPR studies (Mn 2+ and Fe 3+ ) of this stone. The obtained results indicated a limited Cd 2+ - and Co 2+ -sorption on the dissolved surface of the carbonate substrate, whereas, under the same experimental conditions, the Pb 2+ - and Cr 3+ -interaction is more intense leading to extended overgrowth of crystalline Pb-carbonates and surface precipitation of amorphous Cr-hydroxides/oxyhydroxides.

Optimal processing conditions for a dolomite cracker for cracking of tar from gasification of biomass fuels. Optimale procesbetingelser for en dolomitkrakker til krakning af tjaere fra forgasning af biobraendsler

Energy Technology Data Exchange (ETDEWEB)

Fjellerup, J.

1989-08-15

Gasification of fuels derived from biomass is of interest in connection with combined cycle systems. During gasification tar compounds can be produced, and these can block further stages of the process. As gas turbines are very sensitive to tar compounds it is necessary to remove the tar completely from the gas. The most effective method appears to be catalytic cracking and it is suggested that dolomite is an effective and cheap catalysator. Based on a survey of relevant literature, the aim was to discover optimal conditions for the process of dolomite cracking. It is concluded that it is important to decarbonate the dolomite before use, that dolomite is not suitable for use in fluidized beds as it can become eroded and is subsequently very quickly blown out, and that it is important to hold the temperature at a level of ca. 800 deg. C. Conditions for fixed bed cracking both with and without steam are also desderibed. (AB) 15 refs.

Evaluation of hypotheses for right-lateral displacement of Neogene strata along the San Andreas Fault between Parkfield and Maricopa, California

Science.gov (United States)

Stanley, Richard G.; Barron, John A.; Powell, Charles L.

2017-12-22

We used geological field studies and diatom biostratigraphy to test a published hypothesis that Neogene marine siliceous strata in the Maricopa and Parkfield areas, located on opposite sides of the San Andreas Fault, were formerly contiguous and then were displaced by about 80–130 kilometers (km) of right-lateral slip along the fault. In the Maricopa area on the northeast side of the San Andreas Fault, the upper Miocene Bitterwater Creek Shale consists of hard, siliceous shale with dolomitic concretions and turbidite sandstone interbeds. Diatom assemblages indicate that the Bitterwater Creek Shale was deposited about 8.0–6.7 million years before present (Ma) at the same time as the uppermost part of the Monterey Formation in parts of coastal California. In the Parkfield area on the southwest side of the San Andreas Fault, the upper Miocene Pancho Rico Formation consists of soft to indurated mudstone and siltstone and fossiliferous, bioturbated sandstone. Diatom assemblages from the Pancho Rico indicate deposition about 6.7–5.7 Ma (latest Miocene), younger than the Bitterwater Creek Shale and at about the same time as parts of the Sisquoc Formation and Purisima Formation in coastal California. Our results show that the Bitterwater Creek Shale and Pancho Rico Formation are lithologically unlike and of different ages and therefore do not constitute a cross-fault tie that can be used to estimate rightlateral displacement along the San Andreas Fault.In the Maricopa area northeast of the San Andreas Fault, the Bitterwater Creek Shale overlies conglomeratic fan-delta deposits of the upper Miocene Santa Margarita Formation, which in turn overlie siliceous shale of the Miocene Monterey Formation from which we obtained a diatom assemblage dated at about 10.0–9.3 Ma. Previous investigations noted that the Santa Margarita Formation in the Maricopa area contains granitic and metamorphic clasts derived from sources in the northern Gabilan Range, on the opposite side of

Acidizing of Zechstein Main Dolomite in the Polish lowlands

Energy Technology Data Exchange (ETDEWEB)

Bierdzychi, W

1966-07-01

The first acidizing of Zechstein Dolomite in the Polish Lowlands was carried out in 1961. In the initial stage, a tendency existed toward multistage acidizing, and preheated acidizing fluid was used. In a preliminary operation, an acid having the concentration 12-36% was used for washing out the borehole. No additives were utilized except formalin for corrosion inhibition. In order to increase the absorption capacity, hydraulic perforations were used. The composition of acidizing fluid was determined in a preliminary study for any individual reservoir. From laboratory study, it was concluded also that the required time of 3-4 hr was sufficient for the exhaustion of acid. The pre-heating of the acid at the bottom of the hole by exothermic reaction with metallic magnesium was abandoned in the later stage of operations.

Harju Elekter väärtustab strateegilist partnerlust / Andres Aarma

Index Scriptorium Estoniae

Aarma, Andres

2003-01-01

Autor kirjeldab elektriseadmete ja -materjalide tootja, ettevõtte Harju Elekter edu põhjuseid läbi olulisemate strateegiliste juhtimisotsuste, personalijuhtimise, tootmise ning toodangu turustamise. Kommenteerivad Sander Danil, Jako Kotkas, Andres Vainola, Rein Siim ja Triin Palge. Diagrammid: Harju Elektri käive, eksport ja kasum, turud käibe järgi, tegevusalad käibe järgi. Skeemid: Harju Elektri tütar- ja sidusettevõtted, organisatsiooni struktuur. Vt. samas intervjuud Harju Elektri nõukogu esimehe Endel Pallaga; Harju Elektri kontsern täna. Lisad: Harju Elektri olulisemad koostöölepingud, laenude tagatised ja panditud vara

DINOFLAGELADOS POTENCIALMENTE TÓXICOS ASOCIADOS A MATERIAL ORGÁNICO FLOTANTE (DRIFT EN SAN ANDRÉS ISLA, RESERVA INTERNACIONAL DE LA BIOSFERA - SEAFLOWER

Directory of Open Access Journals (Sweden)

JOSÉ ERNESTO MANCERA-PINEDA

2014-06-01

Full Text Available Con el propósito de evaluar la abundancia y la composición de dinoflagelados potencialmente tóxicos asociados al material orgánico flotante (drift en la isla de San Andrés, se seleccionaron siete sitios de muestreo a lo largo de la margen Norte y Este, paralelos a la barrera arrecifal y a las principales praderas de fanerógamas marinas y macroalgas de la isla. Durante la época de mayor intensidad de vientos, se recolectaron muestras de drift; se identificaron los sustratos a especie y posteriormente se sumergieron en solución 1:1 agua de mar filtrada y solución de Transeau. Luego de agitar vigorosamente las muestras para remover los dinoflagelados, se tamizo la suspensión con una malla de 80 µm y el filtrado se observó al microscopio óptico. Se encontraron cinco sustratos, dos especies de pastos marinos y tres de macroalgas. Sobre los sustratos se identificaron doce especies de dinoflagelados, diez reportadas como tóxicas, causantes de diarrea, parálisis y ciguatera. La abundancia de dinoflagelados varió ampliamente con promedios máximos (±DE de 15 354±15 749 células/g peso seco de sustrato. De las especies de dinoflagelados, cinco son nuevos registros para San Andrés. No se encontraron diferencias significativas en los valores de diversidad de dinoflagelados entre drift y praderas de pastos y macroalgas, no obstante, la abundancia fue mucho mayor en el drift. Los resultados indican que el drift es un importante sustrato para dinoflagelados y dada su naturaleza flotante, representa tal vez el vector más importante para la dispersión de estos agentes de toxicidad en la isla. Para mitigar el efecto de eventos tóxicos asociados a dinoflagelados en salud pública, pesca y turismo, es necesario diseñar un plan de manejo del material orgánico flotante, que permita mejorar el entendimiento de su composición y dinámica temporal, monitorear las toxinas asociadas e implementar mecanismos de recolección y tratamiento.

Sympatric cattle grazing and desert bighorn sheep foraging

Science.gov (United States)

Garrison, Kyle R.; Cain, James W.; Rominger, Eric M.; Goldstein, Elise J.

2015-01-01

Foraging behavior affects animal fitness and is largely dictated by the resources available to an animal. Understanding factors that affect forage resources is important for conservation and management of wildlife. Cattle sympatry is proposed to limit desert bighorn population performance, but few studies have quantified the effect of cattle foraging on bighorn forage resources or foraging behavior by desert bighorn. We estimated forage biomass for desert bighorn sheep in 2 mountain ranges: the cattle-grazed Caballo Mountains and the ungrazed San Andres Mountains, New Mexico. We recorded foraging bout efficiency of adult females by recording feeding time/step while foraging, and activity budgets of 3 age-sex classes (i.e., adult males, adult females, yearlings). We also estimated forage biomass at sites where bighorn were observed foraging. We expected lower forage biomass in the cattle-grazed Caballo range than in the ungrazed San Andres range and lower biomass at cattle-accessible versus inaccessible areas within the Caballo range. We predicted bighorn would be less efficient foragers in the Caballo range. Groundcover forage biomass was low in both ranges throughout the study (Jun 2012–Nov 2013). Browse biomass, however, was 4.7 times lower in the Caballo range versus the San Andres range. Bighorn in the Caballo range exhibited greater overall daily travel time, presumably to locate areas of higher forage abundance. By selecting areas with greater forage abundance, adult females in the Caballo range exhibited foraging bout efficiency similar to their San Andres counterparts but lower overall daily browsing time. We did not find a significant reduction in forage biomass at cattle-accessible areas in the Caballo range. Only the most rugged areas in the Caballo range had abundant forage, potentially a result of intensive historical livestock use in less rugged areas. Forage conditions in the Caballo range apparently force bighorn to increase foraging effort by

Methodology for the study of the dolomite porosity in essay of interrupted sulfation

OpenAIRE

Ávila, Ivonete; Crnkovic, Paula M.; Milioli, Fernando E.

2010-01-01

The aim of this work is to propose a methodology to evaluate the evolution of the pore blockage of limestone during the sulfation reaction. The experiments were performed for a national limestone (dolomite) with average particle size of 545 μm in interrupted sulfation tests were conducted at seven different times and at three different temperatures of the process. The empirical data were obtained from porosimetry tests to establish BET surface area, volume and average size of pore and di...

Use of dolomite phosphate rock (DPR) fertilizers to reduce phosphorus leaching from sandy soil

International Nuclear Information System (INIS)

Chen, G.C.; He, Z.L.; Stoffella, P.J.; Yang, X.E.; Yu, S.; Calvert, D.

2006-01-01

There is increasing concern over P leaching from sandy soils applied with water-soluble P fertilizers. Laboratory column leaching experiments were conducted to evaluate P leaching from a typical acidic sandy soil in Florida amended with DPR fertilizers developed from dolomite phosphate rock (DPR) and N-Viro soil. Ten leaching events were carried out at an interval of 7 days, with a total leaching volume of 1183 mm equivalent to the mean annual rainfall of this region during the period of 2001-2003. Leachates were collected and analyzed for total P and inorganic P. Phosphorus in the leachate was dominantly reactive, accounting for 67.7-99.9% of total P leached. Phosphorus leaching loss mainly occurred in the first three leaching events, accounting for 62.0-98.8% of the total P leached over the whole period. The percentage of P leached (in the total P added) from the soil amended with water-soluble P fertilizer was higher than those receiving the DPR fertilizers. The former was up to 96.6%, whereas the latter ranged from 0.3% to 3.8%. These results indicate that the use of N-Viro-based DPR fertilizers can reduce P leaching from sandy soils. - Fertilizers developed from dolomite phosphate rock (DPR) reduce phosphorus leaching from sandy soil

Temporal occurrence and activity of landslides in the area of Cortina d'Ampezzo (Dolomites, Italy)

Science.gov (United States)

Panizza, Mario; Pasuto, Alessandro; Silvano, Sandro; Soldati, Mauro

1996-04-01

This article shows the results of research on landslides carried out in the area of Cortina d'Ampezzo (Dolomites, Italy) within the framework of the EPOCH Project of the European Community. The investigated area, where tourism activities and infrastructures are highly developed, has been affected by several landslides since the retreat of the Würnian glaciers and is at present still affected by active slides and flows which endanger some villages. After a geological and geomorphological description, the distribution in space and time of landslides which occurred in the surroundings of Cortina d'Ampezzo is presented. The type, activity, frequency and, when possible, the age of mass movements have been outlined. Furthermore, special attention is focused on the landslides active at present which are reactivations of ancient movements. The results from the monitoring systems, which were installed in order to survey kinematic and hydrogeologic parameters and define the movement rate, are shown. The research enables the reconstruction of the post-Würmian geomorphological evolution of a site in the Dolomites that appears to be very peculiar both on account of the wide distribution of landslides and the intense human activity.

Multiple isotopes (O, C, Li, Sr) as tracers of CO2 and brine leakage from CO2-enhanced oil recovery activities in Permian Basin, Texas, USA

Science.gov (United States)

Phan, T. T.; Sharma, S.; Gardiner, J. B.; Thomas, R. B.; Stuckman, M.; Spaulding, R.; Lopano, C. L.; Hakala, A.

2017-12-01

Potential CO2 and brine migration or leakage into shallow groundwater is a critical issue associated with CO2 injection at both enhanced oil recovery (EOR) and carbon sequestration sites. The effectiveness of multiple isotope systems (δ18OH2O, δ13C, δ7Li, 87Sr/86Sr) in monitoring CO2 and brine leakage at a CO2-EOR site located within the Permian basin (Seminole, Texas, USA) was studied. Water samples collected from an oil producing formation (San Andres), a deep groundwater formation (Santa Rosa), and a shallow groundwater aquifer (Ogallala) over a four-year period were analyzed for elemental and isotopic compositions. The absence of any change in δ18OH2O or δ13CDIC values of water in the overlying Ogallala aquifer after CO2 injection indicates that injected CO2 did not leak into this aquifer. The range of Ogallala water δ7Li (13-17‰) overlaps the San Andres water δ7Li (13-15‰) whereas 87Sr/86Sr of Ogallala (0.70792±0.00005) significantly differs from San Andres water (0.70865±0.00003). This observation demonstrates that Sr isotopes are much more sensitive than Li isotopes in tracking brine leakage into shallow groundwater at the studied site. In contrast, deep groundwater δ7Li (21-25‰) is isotopically distinct from San Andres produced water; thus, monitoring this intermitted formation water can provide an early indication of CO2 injection-induced brine migration from the underlying oil producing formation. During water alternating with gas (WAG) operations, a significant shift towards more positive δ13CDIC values was observed in the produced water from several of the San Andres formation wells. The carbon isotope trend suggests that the 13C enriched injected CO2 and formation carbonates became the primary sources of dissolved inorganic carbon in the area surrounding the injection wells. Moreover, one-way ANOVA statistical analysis shows that the differences in δ7Li (F(1,16) = 2.09, p = 0.17) and 87Sr/86Sr (F(1,18) = 4.47, p = 0.05) values of

Review: André du Pisani, Reinhart Kössler, and William A. Lindeke (eds., The Long Aftermath of War: Reconciliation and Transition in Namibia (2010 Buchbesprechung: André du Pisani, Reinhart Kössler und William A. Lindeke (Hrsg., The Long Aftermath of War: Reconciliation and Transition in Namibia (2010

Directory of Open Access Journals (Sweden)

Dag Henrichsen

2011-01-01

Full Text Available Review of the edited volume: André du Pisani, Reinhart Kössler, and William A. Lindeke (eds., The Long Aftermath of War: Reconciliation and Transition in Namibia (Freiburger Beiträge zu Entwicklung und Politik, 37, Freiburg: Arnold-Bergstraesser-Institut, 2010, ISBN 978-3-928597-55-5, 437 pp.Besprechung des Sammelbandes: André du Pisani, Reinhart Kössler und William A. Lindeke (Hrsg., The Long Aftermath of War: Reconciliation and Transition in Namibia (Freiburger Beiträge zu Entwicklung und Politik, 37, Freiburg: Arnold-Bergstraesser-Institut, 2010, ISBN 978-3-928597-55-5, 437 Seiten

Film Diegost - kriitikavaba kummardus / Andres Must

Index Scriptorium Estoniae

Must, Andres

2007-01-01

PÖFFi filme - Argentiina mängufilm legendaarse jalgpalluri Diego Maradona jumaldamisest "Teel Maradona juurde" ("El camino de San Diego") : stsenarist ja režissöör Carlos Sorin. Artikkel on peamiselt Maradonast, vähesel määral filmist

Scrap tire pyrolysis using a new type two-stage pyrolyzer: Effects of dolomite and olivine on producing a low-sulfur pyrolysis oil

International Nuclear Information System (INIS)

Choi, Gyung-Goo; Oh, Seung-Jin; Kim, Joo-Sik

2016-01-01

Scrap tire pyrolysis was performed using a two-stage pyrolyzer consisting of an auger reactor and a fluidized bed reactor to produce a low-sulfur pyrolysis oil. In the experiments, the effect of the residence time of the feed material in the auger reactor was investigated at ∼300 (auger reactor) and 500 °C (fluidized bed reactor). In addition, natural dolomite and olivine and calcined dolomite and olivine were used as the fluidized bed materials to examine their effects on reducing the sulfur content of pyrolysis oil. In the experiments, the yields of the oil from the auger reactor were 1.4–3.7 wt%, and it was enriched with DL-limonene whose content in the oil was 40–50 wt%. The yields of the oil from the fluidized bed reactor were 42–46 wt%. The optimum residence time of the feed material in the auger reactor turned out to be 3.5 min. Calcined dolomite and olivine significantly decreased the sulfur content of pyrolysis oil. Metal oxides of the additives appeared to react with H_2S to form metal sulfides. The sulfur content of pyrolysis oil obtained with calcined olivine was 0.45 wt%. - Highlights: • Scrap tires were successfully pyrolyzed in a new type two-stage pyrolyzer. • The two-stage pyrolyzer is composed of an auger and fluidized bed reactors. • Calcination of olivine and dolomite led to a strong decrease in sulfur. • The lowest sulfur content of pyrolysis oil was 0.45 wt%. • Pyrolysis oil yields from the fluidized bed reactor were 43–46 wt%.

Minería, conflicto y mediadores locales: Minera San Xavier en Cerro de San Pedro, México Mineira, conflito e mediadores locais: Minera San Xavier em Cerro de San Pedro Mining, conflict and local brokers: Minera San Xavier in Cerro de San Pedro

Directory of Open Access Journals (Sweden)

Hernán Horacio Schiaffini

2011-12-01

Full Text Available Este trabajo indaga en las instancias de mediación que intervienen en la articulación de procesos económicos de gran escala y su puesta en práctica local. Basándonos en el conflicto que se produjo en el Municipio de Cerro de San Pedro (San Luis Potosí, México entre la empresa Minera San Xavier y el Frente Amplio Opositor (FAO a la misma, aplicamos el método etnográfico con el objetivo de describir las estructuras locales de mediación política y analizar sus prácticas y racionalidad. Intentamos demostrar así la importancia de los factores políticos locales en las vinculaciones entre estado, empresa y población.Este trabalho indaga nas instâncias de mediação que intervêm em processos econômicos de grande escala e sua posta em prática local. Baseando-nos no conflito no Cerro de San Pedro (San Luis Potosí, México entre a empresa Minera San Xavier e a Frente Amplio Opositor (FAO aplicamos o método etnográfico pra descrever as estruturas de mediação política locais e analisar suas práticas e racionalidade. Tenta-se demonstrar assim a importância dos fatores políticos locais nas vinculações entre estado, empresa e população.This paper investigates in instances of mediation involved in large-scale economic processes and local implementation. Analyzing the conflict in Cerro de San Pedro (San Luis Potosí, México among San Xavier mining company and the Frente Amplio Opositor (FAO, it applies an ethnographic approach to describe the local structures of political mediation and its practices and rationality. The work shows the relevance of local factors in the relationships between State, company and people.

Dolomitic lime amendment affects pine bark substrate pH, nutrient availability, and plant growth: A review

Science.gov (United States)

Dolomitic lime (DL) is one of the most commonly used fertilizer amendments in nursery container substrates. It is used to adjust pH of pine bark substrates from their native pH, 4.1 to 5.1, up to about pH 6. Additions of DL have been shown to be beneficial, inconsequential, or detrimental dependin...

Esimene Eesti maja Hiinas = The first Estonian house in China / Andres Põime, Lauri Vaimel ; interv. Triin Ojari

Index Scriptorium Estoniae

Põime, Andres

2008-01-01

Vestlus Pekingi Eesti saatkonna arhitektuurikonkursi võidutöö autoritega. Tulemused: I preemia - Andres Põime, Lauri Vaimel, II - Erik Nobel, Christian Jensen, Kristen Herup Sovang, Soren Andersson, Pille Kivihall, Dan Ljungar, Hans Willadsen (Taani), III - Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik

SEDIMENTOLOGY, MINERALOGY AND ORIGIN OF THE FIRST DISCOVER MAGNESITE-DOLOMITE BELT IN MA'RIB DISTRICT, SW ARABIAN PENINSULA

Directory of Open Access Journals (Sweden)

Sa’ad Zeki A.kader AL-MASHAIKIE

2016-10-01

Full Text Available Magnesite mineralization of high purity was discovered and described herein for the first time from metamorphosed folded belt from Al-Thanyiah locality in Rub’Al-Khali sector, 360 km east of Sana’a City, northwest Yemen. The magnesite-metamorphic belt, belonging to the Precambrian/Neoproterozoic age? comprises thrust belt, which trends generally N-S direction.Magnesite mineralization was identified in an extended carbonate-metamorphic belt for several tens of kilometers cf. 31 km and occurred in association with 8 stratigraphic units. The thicknesses of pure magnesite bearing units are variable and ranges from 20 to 60 m. associated with dark green chlorite-schist with intersecting huge ultrabasic intrusions.Geochemical, mineralogical and petrographic analysis show that the magnesite concentrations in the stratigraphic units are ranging from 78% up to high purity of 99.6% cf. 35 to 48.9% MgO, with minor dolomite and calcite respectively. Little to rare content of talc and brucite were also recognized. Two thick, productive and high purity magnesite beds, the first is of 40 m thick and the second is 60 m in thickness, which reveals more than 95% MgCO3 and considered to be economic. The suggested origin of the magnesite mineralization is coming from high stress of regional metamorphism associated with ultramafic intrusions cf. amphibolite and harzburgite associated with diagenetic solutions rich in Mg2+, associated with the heat of magma. The alteration of dolomite to magnesite was formed by multiple phases to transform calcite and/or dolomite to magnesite.

Ehitatud võrdsus. Tüüpprojekteerimine 20. sajandi elamuehituses : 23. september - 29. oktoober, Eesti Arhitektuurimuuseum, Rotermanni soolaladu / Andres Kurg

Index Scriptorium Estoniae

Kurg, Andres, 1975-

2000-01-01

Näitus keskendub linnakorteritele ja -elamutele Eestis, alates 1920. aastate riikliku ehituslaenuga ehitatud korteritest, lõpetades nõukogude perioodi industriaalse massehitusega. Kuraator Andres Kurg, kujundaja arhitektuuribüroo Kolm Pluss Üks

Séminaire de probabilités XXXIX in memoriam Paul-André Meyer

CERN Document Server

Yor, Marc

2006-01-01

The 39th volume of Séminaire de Probabilités is a tribute to the memory of Paul André Meyer. His life and achievements are recalled; homages are rendered by his friends and colleagues. This volume also contains mathematical contributions to classical and quantum stochastic calculus, the theory of processes, martingales and their applications to mathematical finance, Brownian motion. They provide an overview on the current trends of stochastic calculus.

76 FR 1386 - Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA

Science.gov (United States)

2011-01-10

...-AA00 Safety Zone; Centennial of Naval Aviation Kickoff, San Diego Bay, San Diego, CA AGENCY: Coast... zone on the navigable waters of San Diego Bay in San Diego, CA in support of the Centennial of Naval... February 12, 2010, the Centennial of Naval Aviation Kickoff will take place in San Diego Bay. In support of...

Dolomitization of carbonated reservoirs of platforms. From geologic data to modeling. Example of the great Bahama bank; La dolomitisation des reservoirs carbonates de plate-forme. Des donnees geologiques a la modelisation. Exemple du Grand Banc des Bahamas

Energy Technology Data Exchange (ETDEWEB)

Caspard, E.

2002-09-01

Dolomitization has long been one of the most studied geological processes because of its economic interest (dolomitic rocks form a significant share of hydrocarbon reservoirs) as well as its academic interest, based on the fact that dolomite scarcely forms in current and recent marine environments whereas seawater is highly over-saturated; and that it is still not possible to synthesize it in laboratory under the same conditions. We used data collected by the University of Miami (Bahamas Drilling Project, ODP Leg 166) to understand the geological context of complete dolomitization of a Messinian 60 m thick reef unit. Classical methods of petrographic analysis of thin sections (optical microscopy, cathodoluminescence, scanning electron microscopy, in situ isotopic analyze using ionic microprobe) showed that the intensity of dolomitization is not controlled by the initial texture of the sediment, that the key parameter for dolomitization is the conservation of the initial mineralogy of magnesian bio-clasts, and that redox conditions, salinity and/or temperature of the precipitation fluid varied significantly during the process. Hydrodynamic modelling showed that during periods of high sea-level, Kohout thermal convection is a viable mechanism for driving marine fluids through the sediments. The key parameter for fluid circulations is the permeability anisotropy on the platform scale. Geochemical modelling showed that seawater is able to induce a complete dolomitization over durations of around one million years. Sensitivity tests showed that the critical parameter (as well as one of the less well-known) to describe diagenetic processes in carbonates is the water/rock reactions kinetics and in particular the precipitation kinetics of carbonate minerals. We finally propose that the dolomitization of the reef unit of the Unda well took place during the high sea-level period which extended over 1,1 My in the early Pliocene, according to the Kohout thermal convection

Intensify dodecylamine adsorption on magnesite and dolomite surfaces by monohydric alcohols

Science.gov (United States)

Zhang, Hao; Liu, Wengang; Han, Cong; Wei, Dezhou

2018-06-01

The flotation of magnesite and dolomite were investigated with the presence of single dodecylamine (DDA) and combined mixtures of DDA and monohydric alcohols, respectively. The adsorption behavior of DDA, butanol, hexanol and octanol on the surface of the two minerals were shown by molecular dynamics simulation, and the results were corresponding with the analysis of zeta potential, measurements of the contact angle and adsorption. Flotation results indicated that part of DDA could be replaced by the three alcohols (butanol, hexanol, octanol) to get better flotation results. Molecular dynamics simulation and the results of zeta potential and contact angle measurements indicated that adsorption of DDA on mineral surfaces could be strengthened by monohydric alcohols.

Andres Bello and the Dissemination of Astronomy: Education and Scientific Rhetoric

Directory of Open Access Journals (Sweden)

Verónica Ramírez Errázuriz

2017-12-01

Full Text Available This paper analyzes the astronomical texts written by Andres Bello between 1810 and 1848, from its educational nature to its rhetorical expression, suggesting that their main purpose was to show the advances in the field - in terms of knowledge production and also technology development- in order to improve the material and intellectual environment of the nation. It also stands that astronomy should be tought by activating creativity and imagination, which may be linked with Bello’s willing to avoid science and art develop apart from each other, keeping, in this case astronomy bonded with literature.

Alkohol, andre rusmidler og vold i epidemiologisk perspektiv

Directory of Open Access Journals (Sweden)

Kai Pernanen

2009-10-01

Full Text Available  SAMMENDRAGDen medisinske interessen for vold og voldsskader har økt kraftig i løpet av de siste to tiårene. Det epidemiologiskeperspektivet på vold har blitt forsterket og et mer etiologisk og preventivt syn på volden er mere merkbarinnenfor sosialmedisinsk forskning. Alkoholen er en etiologisk faktor som har vist seg å være forbundet med voldi de aller fleste samfunn. I denne artikkelen beskrives de viktigste epidemiologiske metodene og funnene i studietav alkoholens sammenheng med vold. Denne sammenhengen har vist seg ikke å være direkte, men er avhengig aven rekke andre faktorer, og noen forskjellige typer av kausal avhengighet beskrives i artikkelen. Den epidemiologiskeforskningen om andre rusmidlers sammenheng med vold er betydelig mindre omfattende enn den er foralkohol. Det er også åpenbart at andre rusmidler ikke er like sterkt sammenknyttet med vold som alkoholen.Pernanen K. Alcohol, other drugs, and violence in an epidemiological perspective.Nor J Epidemiol ENGLISH SUMMARYThe public health approach to violence has become increasingly accepted during the last couple of decades. Thishas led to more epidemiological research into violence, and a stronger medical interest in the etiology and preventionof violence. However, epidemiological research on the prevalence of violence in different societies is stillmainly criminological in nature, being based on information about violence that has come to the attention of thepolice or processed in the courts. The study of the relationship between alcohol use and violent behaviour is alsopredominantly based on police and court materials, although an increasing number of emergency room andhospitalization studies have examined the role of alcohol in injuries caused by violence.There are two basic methodological approaches in the study of the relationship between alcohol use andviolence. The alcohol-involvement studies estimate the extent to which drinking by the offender or the victim

San Marino.

Science.gov (United States)

1985-02-01

San Marino, an independent republic located in north central Italy, in 1983 had a population of 22,206 growing at an annual rate of .9%. The literacy rate is 97% and the infant mortality rate is 9.6/1000. The terrain is mountainous and the climate is moderate. According to local tradition, San Marino was founded by a Christian stonecutter in the 4th century A.D. as a refuge against religious persecution. Its recorded history began in the 9th century, and it has survived assaults on its independence by the papacy, the Malatesta lords of Rimini, Cesare Borgia, Napoleon, and Mussolini. An 1862 treaty with the newly formed Kingdom of Italy has been periodically renewed and amended. The present government is an alliance between the socialists and communists. San Marino has had its own statutes and governmental institutions since the 11th century. Legislative authority at present is vested in a 60-member unicameral parliament. Executive authority is exercised by the 11-member Congress of State, the members of which head the various administrative departments of the goverment. The posts are divided among the parties which form the coalition government. Judicial authority is partly exercised by Italian magistrates in civil and criminal cases. San Marino's policies are tied to Italy's and political organizations and labor unions active in Italy are also active in San Marino. Since World War II, there has been intense rivalry between 2 political coalitions, the Popular Alliance composed of the Christian Democratic Party and the Independent Social Democratic Party, and the Liberty Committee, coalition of the Communist Party and the Socialist Party. San Marino's gross domestic product was $137 million and its per capita income was $6290 in 1980. The principal economic activities are farming and livestock raising, along with some light manufacturing. Foreign transactions are dominated by tourism. The government derives most of its revenue from the sale of postage stamps to

San Francisco District Laboratory (SAN)

Data.gov (United States)

Federal Laboratory Consortium — Program CapabilitiesFood Analysis SAN-DO Laboratory has an expert in elemental analysis who frequently performs field inspections of materials. A recently acquired...

Mountain geomorphosites in Odle Group (Dolomites, Italy)

Science.gov (United States)

Coratza, Paola; Ghinoi, Alessandro; Marchetti, Mauro; Soldati, Mauro

2016-04-01

The area, considered in the present study, is located in the north-eastern sector of the Gardena valley, in the Odle Group, a popular destination of summer and winter tourism (more than 3000 m a.s.l.). The area has a strong hiking-tourism vocation thanks to its spectacular high-mountain landscape and a dense network of hiking tracks. The well-developed network of hiking paths and slopes for many different climbing skills offers a lot of possibilities for high-mountain excursions. Permanent dwelling-places are absent with the exceptions of a few tourist structures nearby opened during certain periods of the year. This area, as all Dolomites, which became UNESCO Word Heritage Site in 2009, represent landscape mosaics, which express the summation of landscape histories and processes offering an almost complete educational open-air laboratory due to the variety and complexity of phenomena and processes taking place during present climate conditions and during recent geological periods. These mountains, due to the aggregation of relict, recent and active landforms constitute an outstanding geoheritage, suitable for educational and tourist purposes. Landforms typical of past morphoclimatic conditions (inherited geomorphosites) share the stage with forms and processes active in the current morphoclimatic conditions (active geomorphosites); their spatial and geometrical relationships may be sufficient to trace a relative time-line of the geomorphological history of the area. Several glacial landforms testify for the presence and the activity of a glacial tongue hosted in the valley during the Lateglacial, mainly located in the northern sector of the area, where altitudes range from about 2000 m to about 2300 m a.s.l. Among these, worth of note are the well-preserved glacial cirques of Val dla Roa and those located at the southern margin of the Odle Group. Quite well preserved moraine ridges are present at a mean altitude of some 2000 m at the Alpe di Cisles as well as

Phase I (Year 1) Summary of Research--Establishing the Relationship between Fracture-Related Dolomite and Primary Rock Fabric on the Distribution of Reservoirs in the Michigan Basin

Energy Technology Data Exchange (ETDEWEB)

G. Michael Grammer

2005-11-09

This topical report covers the first 12 months of the subject 3-year grant, evaluating the relationship between fracture-related dolomite and dolomite constrained by primary rock fabric in the 3 most prolific reservoir intervals in the Michigan Basin (Ordovician Trenton-Black River Formations; Silurian Niagara Group; and the Devonian Dundee Formation). Phase I tasks, including Developing a Reservoir Catalog for selected dolomite reservoirs in the Michigan Basin, Characterization of Dolomite Reservoirs in Representative Fields and Technology Transfer have all been initiated and progress is consistent with our original scheduling. The development of a reservoir catalog for the 3 subject formations in the Michigan Basin has been a primary focus of our efforts during Phase I. As part of this effort, we currently have scanned some 13,000 wireline logs, and compiled in excess of 940 key references and 275 reprints that cover reservoir aspects of the 3 intervals in the Michigan Basin. A summary evaluation of the data in these publications is currently ongoing, with the Silurian Niagara Group being handled as a first priority. In addition, full production and reservoir parameter data bases obtained from available data sources have been developed for the 3 intervals in Excel and Microsoft Access data bases. We currently have an excess of 25 million cells of data for wells in the Basin. All Task 2 objectives are on time and on target for Phase I per our original proposal. Our mapping efforts to date, which have focused in large part on the Devonian Dundee Formation, have important implications for both new exploration plays and improved enhanced recovery methods in the Dundee ''play'' in Michigan--i.e. the interpreted fracture-related dolomitization control on the distribution of hydrocarbon reservoirs. In an exploration context, high-resolution structure mapping using quality-controlled well data should provide leads to convergence zones of fault

Identiteedid anno 2005

Index Scriptorium Estoniae

2005-01-01

11. veebruarist Tallinna Kunstihoones Harry Liivranna kureeritud Eesti Kunstnike Liidu aastanäitus "Identiteedid". Loetletud 22 osalejat. Näituse on kujundanud Andres Tolts. Näitusekujunduse graafiline identiteet tugineb Mart Andersoni loodud uuele kirjatüübile Pagana Sans

Evaluation and proposed study of potential ground-water supplies, Gallup area, New Mexico

Science.gov (United States)

Hiss, William L.

1975-01-01

The ground-water potential of 5 areas in central-western New Mexico within 85 miles (135 km) of Gallup, N. Mex. was evaluated by reviewing the published literature, inspecting aerial and space photographs, and interviewing ranchers and personnel employed by well-drilling and mineral-exploration companies by telephone. The San Andres Limestone and underlying Glorieta Sandstone of Permian age are the oldest aquifers capable of yielding water of a quality suitable for municipal use. Extreme local variations in hydraulic conductivity and water quality reflect a karstic topography developed on the San Andres Limestone prior to burial by Upper Triassic sediments. The San Andres Limestone and Glorieta Sandstone form an important aquifer in the Grants-Bluewater area where yields of as much as 2,200 gallons per minute (140 l/s) have been obtained. Yields from wells completed in the San Andres-Glorieta aquifer on the Chaco slope and in the Gallup sag-Mogollon slope on the northeast and southeast flanks, respectively, of the Zuni uplift will be much less than those prevailing in the Grants-Bluewater area. Water quality in the San Andres Limestone and Glorieta Sandstone deteriorates with distance away from the axis of the Zuni uplift. Sandstones of Triassic, Jurassic, and Cretaceous age are potential aquifers wherever they are present. Yields to wells tapping these aquifers are generally less than 200 gallons per minute (13 l/s) due to the relatively low hydraulic conductivity. Wells tapping alluvium of Late Cenozoic age along the Rio San Jose and Puerco River and interbedded volcanics and alluvium elsewhere in the area generally yield less than 100 gallons per minute (6 l/s) of water. Tributaries ,of the Rio San Jose that have eroded canyons into Paleozoic and Mesozoic rocks east of the Continental Divide and south of the eastern part of the Zuni uplift have been repeatedly displaced and (or) covered by Quaternary volcanic rocks. The exact location, extent, and depth of

77 FR 2609 - Unblocking of Specially Designated Nationals and Blocked Persons Pursuant to the Foreign...

Science.gov (United States)

2012-01-18

..., S.A. DE C.V. (a.k.a. MEDIC EXPRESS, S.A. DE C.V.; a.k.a. GRUPO LOMEDIC), Av. del Parque 489, Col. San Andres, Guadalajara, Jalisco 44810, Mexico; Calle Chicle 234, Colonia El Colli Industrial, Zapopan...

76 FR 9709 - Water Quality Challenges in the San Francisco Bay/Sacramento-San Joaquin Delta Estuary

Science.gov (United States)

2011-02-22

... Water Quality Challenges in the San Francisco Bay/Sacramento-San Joaquin Delta Estuary AGENCY... the San Francisco Bay/ Sacramento-San Joaquin Delta Estuary (Bay Delta Estuary) in California. EPA is... programs to address recent significant declines in multiple aquatic species in the Bay Delta Estuary. EPA...

33 CFR 165.776 - Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico 165.776 Section 165.776 Navigation and Navigable Waters COAST... Guard District § 165.776 Security Zone; Coast Guard Base San Juan, San Juan Harbor, Puerto Rico (a...

The behaviour of water discharged into the subsoil in a dolomitic mining area

International Nuclear Information System (INIS)

De Jesus, A.S.M.

1989-01-01

Water extracted from the underground works, at a depth of approximately 1 000 m, in a mine situated in a dolomitic area was being discharged into a series of boreholes on the surface. It was, however, presumed, that some recirculation was occurring. A tracer investigation was carried out to assess whether at least some of the water was reaching the underground works and the transit times involved. Since indium can be determined by means of neutron activation analysis at concentration levels as low as 10 -11 g/l water, this element was selected as tracer. The results are discussed. 9 refs., 5 figs

Enhanced Preliminary Assessment Report: Presidio of San Francisco Military Reservation, San Francisco, California

Science.gov (United States)

1989-11-01

CAD981415656 Filmore Steiner Bay San Francisco 24 PG&E Gas Plant SanFran 502-IG CAD981415714 Bay North Point Buchanan Laguna 25 PG&E Gas Plant SanFran 502-1H...76-ioV /5,JO /0.7 /,230 PSF Water PSF, Main U.N. Lagunda Honda Analvte Plant Clearwell Reservoir Plaza Reservoi- Chlordane inetab. ə.2 ə.2 (1.2 ə.2

Fromleik i Black Supper, Piss Christ og Crucifixion, tre fotografi av Andres Serrano

OpenAIRE

Vinje, Lilly

2006-01-01

Oppgåva skal omhandla tre utvalgte foto av fotografen Andres Serrano, ein amerikanar født i 1950. Enkeltbileta det er snakk om er Black Supper (1990), Piss Christ og Crucifixion (begge 1987). Dei er laga ved at kitschfigurar er nedsenka i gjennomsiktige behaldarar fyllte av kroppsvæsker og vatn; vatn i Black Supper, urin i Piss Christ og blod i Crucifixion. Henholdsvis framstiller dei Nattverden, Jesus på krossen og Krossfestinga (tre figurar). Serrano befinn seg med desse innanfor religiøs k...

Hotell 'Bernhard' Otepääl. Otepää aedlinn, Kolga tee 22a / Andres Lunge

Index Scriptorium Estoniae

Lunge, Andres

1998-01-01

Otepää aedlinnas asuva U. Tiirmaa poolt kuuekümnendatel projekteeritud Tartu Katseremonditehase puhkebaasi rekonstrueerimine. Kavandati uus peasissepääs, täiendav tubadekorrus, restoran, vastuvõtufuajee jm. ning juurdeehitusena osaliselt maaalune lisakorpus konverentsisaali jm. ruumidega. Tellija: AS Regel. Projekteerija: Tareke Projekt OÜ. Arhitekt Andres Lunge. Sisekujundaja Taisi Kadarik. Ehitus: AS Regel, 1996-1998. Projekt 1995, 1998, valmis 1998

Sexualcoercion: Woman Subordination Undergone By Hanna X In Andre Brink's The Otherside Of Silence Novel

OpenAIRE

NUSANTI, RIHAN

2014-01-01

Nusanti, Rihan. 2014. “Sexual Coercion: Woman Subordination Undergoneby Hanna X in Andre Brink's The Otherside of Silence novel”. Study Programof English, Department of Languages and Literature, Faculty of Cultural Studies,Universitas Brawijaya. Supervisor: Fariska Pujiyanti, M.Hum; Co-supervisor: Winda Candra Hantari,M.A. Keywords: Feminist-Marxist, sexual coercion, patriarchy, women subordination,German women In traditional view, women occupy secondary position lower than men in society. It...

Strontium geochemistry and carbon and oxygen isotopic compositions of Lower Proterozoic dolomite and calcite marbles from the Marmorilik Formation, West Greenland

International Nuclear Information System (INIS)

Garde, A.A.

1979-01-01

The Marmorilik Formation, Rinkian mobile belt, West Greenland, is a large, Lower Proterozoic carbonate-rock sequence, deformed and metamorphosed under greenschist to amphibolite facies conditions. The pre-deformation thickness of the sequence is at least 2000 m, with about 1400 m of dolomite marble and 350 m of calcite marble. Strontium contents of forty-two dolomite and calcite marbles range from 30 to 100 ppm and 300 to 800 ppm, respectively, whereas samples with calcite of secondary origin have strontium contents between 80 ppm and 200 ppm. Carbon and oxygen isotope ratios were determined for forty calcite and dolomite marbles as -0.2+-1.0 per 1000 delta 13 C and -9.9+-1.5 per 1000 delta 18 O (vs. PDB) and are compatible with the isotopic compositions of unmetamorphosed carbonates of similar age. Calcite from eight calciumsilicate rocks, breccias and calcite veins is significantly more negative in delta 13 C and delta 18 O. Five 13 C analyses of graphite in marble range from -9.6 to -14 per 1000. Possible post-depositional changes in the strontium content and carbon and oxygen isotope compositions are discussed. It is concluded that (a) the calcite marbles are not dedolomites and are therefore of primary origin, (b) the delta 13 C and delta 18 O values of the marbles are primary or diagenetic (i.e., pre-metamorphic), and (c) the isotopic composition of the graphite is compatible with, though not necessarily evidence for, a biogenic origin. (Auth.)

A case for historic joint rupture of the San Andreas and San Jacinto faults.

Science.gov (United States)

Lozos, Julian C

2016-03-01

The San Andreas fault is considered to be the primary plate boundary fault in southern California and the most likely fault to produce a major earthquake. I use dynamic rupture modeling to show that the San Jacinto fault is capable of rupturing along with the San Andreas in a single earthquake, and interpret these results along with existing paleoseismic data and historic damage reports to suggest that this has likely occurred in the historic past. In particular, I find that paleoseismic data and historic observations for the ~M7.5 earthquake of 8 December 1812 are best explained by a rupture that begins on the San Jacinto fault and propagates onto the San Andreas fault. This precedent carries the implications that similar joint ruptures are possible in the future and that the San Jacinto fault plays a more significant role in seismic hazard in southern California than previously considered. My work also shows how physics-based modeling can be used for interpreting paleoseismic data sets and understanding prehistoric fault behavior.

A case for historic joint rupture of the San Andreas and San Jacinto faults

Science.gov (United States)

Lozos, Julian C.

2016-01-01

The San Andreas fault is considered to be the primary plate boundary fault in southern California and the most likely fault to produce a major earthquake. I use dynamic rupture modeling to show that the San Jacinto fault is capable of rupturing along with the San Andreas in a single earthquake, and interpret these results along with existing paleoseismic data and historic damage reports to suggest that this has likely occurred in the historic past. In particular, I find that paleoseismic data and historic observations for the ~M7.5 earthquake of 8 December 1812 are best explained by a rupture that begins on the San Jacinto fault and propagates onto the San Andreas fault. This precedent carries the implications that similar joint ruptures are possible in the future and that the San Jacinto fault plays a more significant role in seismic hazard in southern California than previously considered. My work also shows how physics-based modeling can be used for interpreting paleoseismic data sets and understanding prehistoric fault behavior. PMID:27034977

76 FR 10945 - San Luis Trust Bank, FSB, San Luis Obispo, CA; Notice of Appointment of Receiver

Science.gov (United States)

2011-02-28

... DEPARTMENT OF THE TREASURY Office of Thrift Supervision San Luis Trust Bank, FSB, San Luis Obispo, CA; Notice of Appointment of Receiver Notice is hereby given that, pursuant to the authority... appointed the Federal Deposit Insurance Corporation as sole Receiver for San Luis Trust Bank, FSB, San Luis...

76 FR 22809 - Safety Zone; Bay Ferry II Maritime Security Exercise; San Francisco Bay, San Francisco, CA

Science.gov (United States)

2011-04-25

... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2011-0196] RIN 1625-AA00 Safety Zone; Bay Ferry II Maritime Security Exercise; San Francisco Bay, San Francisco, CA AGENCY... Security Exercise; San Francisco Bay, San Francisco, CA. (a) Location. The limits of this safety zone...

Lean versus Quick Response Manufacturing og andre koncepter - er Lean den eneste ene?

DEFF Research Database (Denmark)

Michelsen, Aage U

2005-01-01

Begrebet Lean har gennem de senere år vundet en enorm udbredelse. Antallet af publikationer om Lean har været eksplosivt stigende, og mange virksomheder har gennemført eller gennemfører Lean-projekter. Er Lean et nyt koncept? Er Lean den eneste løsning? Kan Lean kombineres med tankegange og princ...... løsning af en anden produktionsopgave. I fjerde afsnit skitseres kort relationerne mellem Lean og to andre begreber, Six Sigma og TPM, der begge har samme mål som Lean, men forskellige udgangspunkter og forskellige indfaldsvinkler....

Aspect of the Characters from The Counterfeiters of André Gide

Directory of Open Access Journals (Sweden)

Hülya Kol

2017-07-01

Full Text Available As a pastry chef, the writer André Gide kneads his dough differently with the intention of putting an end to imitation in the world of the novel. He has the courage to treat the subject of the novel on the contrary to his contemporaries. He succeeds by introducing the reader into the novel. The reader finds fantastic stories and interesting characters in The Counterfeiters. Themes such as the hypocrisy and falsity of these characters are a reflection of the title that evokes them. Gide transmits this problematic period to the reader with surprising skill. The contrast in the words and behaviors of people are the evil traces of war.

Rheology of cement mixtures with dolomite filler

Directory of Open Access Journals (Sweden)

Martínez de la Cuesta, P. J.

2000-06-01

Full Text Available This experimental program has studied the behavior of fresh paste made up from cements mixed with dolomite filler. Through prior experiments the starting point is obtained for the designs 2² and 2³ factorials. With these designs the governing equations are established that influence the specific surface of the filler, the filler percentage and the ratio water/(cement + filler, used as objective functions: test probe penetration, flow on table and shear stress in viscometer. Also the type of rheological conduct is determined and the influence over initial and final setting is observed.

Este programa experimental estudia el comportamiento de las pastas frescas fabricadas a partir de cementos mezclados con filler dolomítico. En los experimentos previos se obtiene el punto central para los diseños 2² y 2³ factoriales. Con estos diseños se establecen las ecuaciones que rigen la influencia de la superficie específica del filler, el porcentaje de filler y la relación agua/(cemento + filler, utilizando como funciones objetivos la penetración de sonda, la mesa de sacudidas y la tensión de corte en el viscosímetro. También se determina el tipo de conducta reológica y la influencia sobre el principio y fin de fraguado.

Qualidade pós-colheita de frutos de tomate cv. Andréa tratados com etileno Postharvest quality of tomato fruits cv. Andréa treated with ethylene

Directory of Open Access Journals (Sweden)

Caroline Andreuccetti

2007-03-01

Full Text Available O tomate é uma das principais hortaliças cultivadas no Brasil e tratamentos que propiciem o controle do amadurecimento são extremamente desejáveis. Avaliou-se a qualidade pós-colheita de tomates tipo italiano tratados com etileno. Tomates 'Andréa' foram colhidos em campos de produção comercial no estádio verde-maduro, selecionados para presença de danos externos e classificados quanto ao tamanho e cor e posteriormente foram tratados com 100 µL L-1 de etileno. Os ensaios foram planejados com delineamento inteiramente casualizado em esquema fatorial com quatro tratamentos e quinze repetições (n=10. Após a aplicação, os frutos foram divididos em dois lotes. Um lote permaneceu a 20º±1ºC e outro foi mantido a 12,5º±1ºC, ambos sob umidade relativa 90±5%. Tomates do tratamento controle foram mantidos nas mesmas condições de temperatura e umidade relativa. Os frutos foram avaliados após cada mudança de estádio de amadurecimento para as seguintes variáveis: coloração externa (L*a*b*, perda de massa, sólidos solúveis totais, acidez titulável e teor de ácido ascórbico. A aplicação de etileno não influenciou de maneira significativa as variáveis químicas e físicas estudadas. Frutos armazenados à temperatura de 20ºC demonstraram maior porcentagem de perda de massa ao longo do amadurecimento, com média de 2,60%. A relação brix/acidez apresentou pouca variação entre os tratamentos avaliados. Frutos do tratamento controle e mantidos à temperatura de 20ºC apresentaram mudança de coloração mais rápida no início dos experimentos, não sendo observada posteriormente diferença significativa no desenvolvimento da cor dos tratamentos avaliados. O tratamento com etileno não acelerou de forma significativa o amadurecimento de tomates 'Andréa' armazenado sob as duas temperaturas estudadas.Tomatoes are one of the most important vegetable crops grown in Brazil and treatments that facilitate ripening control are

The San Bernabe power substation; La subestacion San Bernabe

Energy Technology Data Exchange (ETDEWEB)

Chavez Sanudo, Andres D. [Luz y Fuerza del Centro, Mexico, D. F. (Mexico)

1997-12-31

The first planning studies that gave rise to the San Bernabe substation go back to year 1985. The main circumstance that supports this decision is the gradual restriction for electric power generation that has been suffering the Miguel Aleman Hydro System, until its complete disappearance, to give priority to the potable water supply through the Cutzamala pumping system, that feeds in an important way Mexico City and the State of Mexico. In this document the author describes the construction project of the San Bernabe Substation; mention is made of the technological experiences obtained during the construction and its geographical location is shown, as well as the one line diagram of the same [Espanol] Los primeros estudios de planeacion que dieron origen a la subestacion San Bernabe se remontan al ano de 1985. La circunstancia principal que soporta esta decision es la restriccion paulatina para generar energia que ha venido experimentando el Sistema Hidroelectrico Miguel Aleman, hasta su desaparicion total, para dar prioridad al suministro de agua potable por medio del sistema de bombeo Cutzamala, que alimenta en forma importante a la Ciudad de Mexico y al Estado de Mexico. En este documento el autor describe el proyecto de construccion de la subestacion San Bernabe; se mencionan las experiencias tecnologicas obtenidas durante su construccion y se ilustra su ubicacion geografica, asi como un diagrama unifilar de la misma

Paleokarst and reservoir porosity in the Ordovician Beekmantown Dolomite of the central Appalachian basin

Science.gov (United States)

Smosna, R.; Bruner, K.R.; Riley, R.A.

2005-01-01

A karst-unconformity play at the top of the Ordovician Beekmantown Dolomite is judged to have great petroleum potential in Ohio and adjacent states; wells have high ultimate reserves and large areas remain untested. To better understand the origin, development, and distribution of Beekmantown porosity, we conducted a petrologic-stratigraphic study of cores and thin sections from 15 oil and gas wells. The massive dolomite, characterized by a hypidiotopic-idiotopic texture, formed by the replacement of stacked peritidal carbonate cycles. Secondary porosity occurs at two scales: (1) mesoscopic - breccia porosity, solution-enlarged fractures, large vugs, and caverns, and (2) microscopic - intercrystalline, intracrystalline, molds, small vugs, and microfractures. Mesoscopic pores (providing the major storage capacity in this reservoir) were produced by intrastratal solution and collapse of carbonate layers, whereas microscopic pores (connecting the larger pores) generally formed by the leaching of individual carbonate grains and crystals. Most pore types developed during periods of subaerial exposure across the carbonate bank, tied to either the numerous, though brief falls of relative sea level during Beekmantown deposition or more importantly the prolonged Knox unconformity at the close of sedimentation. The distribution of reservoir-quality porosity is quite heterogeneous, being confined vertically to a zone immediately below the unconformity and best developed laterally beneath buried hills and noses of this erosion surface. The inferred, shallow flow of ground water in the Beekmantown karst, primarily below topographic highs and above a diagenetic base level close to the water table, led to this irregular distribution of porosity.

A propósito de don Andrés Bello

Directory of Open Access Journals (Sweden)

Carlos Restrepo Canal

1965-09-01

Full Text Available Al meditar en estos días sobre el insigne personaje de quien se conmemora el centenario de su fallecimiento -esto es de don Andrés Bello- al analizar su personalidad, estudiada y elogiada por tan autorizados y eruditos escritor es colombianos y extranjeros, al abrir de nuevo los muchos libros que contien en el variado conjunto de sus obras, se llega al convencimiento de que fue Bello como uno de aquellos grandes y brillantes varones del Renacimiento cuyas amplias facultades les hacían aptos para llegar al conocimiento de múltiples y variadas ramas del saber humano y para profundizar en ellas hasta llegar a constituirse en maestros y guías de las generaciones de su tiempo y de las que les sucedieron.

Criteria for selection of dolomites and catalysts for tar elimination from biomass gasification gas. Kinetic constants

Energy Technology Data Exchange (ETDEWEB)

Corella, J; Narvaez, I; Orio, A [Madrid Univ. (Spain). Dept. of Chem. Eng.

1997-12-31

Calcined dolomites and commercial steam reforming catalysts are used downstream biomass gasifiers for hot catalytic raw gas cleaning. To further compare these solids under a rigorous basis, a reaction network and a kinetic model are presented. The apparent kinetic constant for the tar reduction is here proposed as a basis of comparison. Tar sampling and analysis, and the units used for the space-time in the catalytic reactor affect the kinetic constants observed. (author) (2 refs.)

Criteria for selection of dolomites and catalysts for tar elimination from biomass gasification gas. Kinetic constants

Energy Technology Data Exchange (ETDEWEB)

Corella, J.; Narvaez, I.; Orio, A. [Madrid Univ. (Spain). Dept. of Chem. Eng.

1996-12-31

Calcined dolomites and commercial steam reforming catalysts are used downstream biomass gasifiers for hot catalytic raw gas cleaning. To further compare these solids under a rigorous basis, a reaction network and a kinetic model are presented. The apparent kinetic constant for the tar reduction is here proposed as a basis of comparison. Tar sampling and analysis, and the units used for the space-time in the catalytic reactor affect the kinetic constants observed. (author) (2 refs.)

Mapa das juventudes de Santo André, SP: instrumento de leitura das desigualdades sociais Mapa de las juventudes de Santo André, Sureste de Brasil: instrumento de lectura de las desigualdades sociales Youth map of the city of Santo André, Southeastern Brazil: an instrument to read social inequalities

Directory of Open Access Journals (Sweden)

Tatiana Yonekura

2010-02-01

Full Text Available OBJETIVO: Analisar as desigualdades sociais de jovens moradores em área urbana pelo mapeamento de dados sociodemográficos e econômicos. MÉTODOS: Utilizando-se dados do Censo Demográfico 2000, 57 variáveis sociodemográficas e econômicas de jovens de 15 a 24 anos do município de Santo André, SP, foram distribuídas por 43 regiões de dados estatísticos que correspondem a um recorte do território em distritos menores. Os dados foram coletados no Departamento de Indicadores Sociais e Econômicos da Prefeitura Municipal de Santo André, referentes ao ano 2000. Por meio de análise fatorial, 13 variáveis foram agrupadas em dois fatores - condições de trabalho e condições de vida, que discriminaram estatisticamente regiões semelhantes entre si. Foi realizada análise por agrupamento das regiões, resultando em quatro grupos sociais. RESULTADOS: O espaço que concentrava os jovens com mais acesso à riqueza foi classificado como central e aqueles com menos acesso, como periférico. Duas gradações intermediárias puderam ser identificadas, uma mais próxima ao extremo do acesso ("quase central" e outra mais próxima à privação ("quase periférica". As variáveis discriminantes estavam relacionadas ao trabalho, à migração, escolaridade, fecundidade, posição do jovem no domicílio, presença de cônjuge ou companheiro, condição de moradia e posse de bens. CONCLUSÕES: As diferenças entre os grupos sociais expressaram desigualdades importantes entre os jovens que vivem, estudam e/ou trabalham na cidade, o que contribuirá para o planejamento de políticas sociais públicas dirigidas a esses grupos.OBJETIVO: Analizar las desigualdades sociales de jóvenes moradores en área urbana por el mapeo de datos sociodemográficos y económicos. MÉTODOS: Utilizándose datos del Censo Demográfico 2000, 57 variables sociodemográficas y económicas de jóvenes de 15 a 24 años del municipio de Santo André, Sureste de Brasil, fueron

Denissen (Frans), André Baillon. Le gigolo d’Irma Idéal

OpenAIRE

Gnocchi, Maria Chiara

2012-01-01

Un titre aux résonances insolites vient chatouiller la règle sobre des Archives du Futur, la collection publiée sous la responsabilité des Archives et Musée de la Littérature de Bruxelles. André Baillon. Le gigolo d’Irma Idéal : un titre qui convient bien à une biographie que l’on a déjà — à juste titre — qualifiée d’extra-ordinaire (F. Ghysen, Le Carnet et les Instants, novembre 1998). Extra-ordinaire est d’ailleurs, avant tout, le protagoniste du volume : Baillon le grand écrivain, Baillon ...

Description of gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California

Science.gov (United States)

Woodrow, Donald L.; John L. Chin,; Wong, Florence L.; Fregoso, Theresa A.; Jaffe, Bruce E.

2017-06-27

Seventy-two gravity cores were collected by the U.S. Geological Survey in 1990, 1991, and 2000 from San Pablo Bay and Carquinez Strait, California. The gravity cores collected within San Pablo Bay contain bioturbated laminated silts and sandy clays, whole and broken bivalve shells (mostly mussels), fossil tube structures, and fine-grained plant or wood fragments. Gravity cores from the channel wall of Carquinez Strait east of San Pablo Bay consist of sand and clay layers, whole and broken bivalve shells (less than in San Pablo Bay), trace fossil tubes, and minute fragments of plant material.

78 FR 34123 - Notice of Inventory Completion: San Francisco State University NAGPRA Program, San Francisco, CA

Science.gov (United States)

2013-06-06

... completion of an inventory of human remains and associated funerary objects under the control of the San....R50000] Notice of Inventory Completion: San Francisco State University NAGPRA Program, San Francisco, CA... NAGPRA Program has completed an inventory of human remains and associated funerary objects, in...

78 FR 21403 - Notice of Inventory Completion: San Francisco State University NAGPRA Program, San Francisco, CA

Science.gov (United States)

2013-04-10

... completion of an inventory of human remains and associated funerary objects under the control of the San....R50000] Notice of Inventory Completion: San Francisco State University NAGPRA Program, San Francisco, CA... NAGPRA Program has completed an inventory of human remains and associated funerary objects, in...

Analysis of lichen species for atmospheric pollution biomonitoring in the Santo Andre municipality, Sao Paulo, Brazil

International Nuclear Information System (INIS)

Saiki, M.; Alves, E.R.; Marcelli, M.P.

2007-01-01

Instrumental neutron activation analysis was applied for the determination of trace elements in Canoparmelia texana species collected in nonpolluted areas of Atlantic Forest and in six sites of Santo Andre Municipality, SP, Brazil. Concentrations of As, Ba, Br, Ca, Cd, Cl, Cr, Cs, Co, Fe, K, La, Mn, Na, Rb, Sb, Sc, Se, U, and Zn were determined and comparisons were made between the results obtained in lichens from different sites

Hydrothermal Dolomites in the Early Albian (Cretaceous Platform Carbonates (NW Spain: Nature and Origin of Dolomites and Dolomitising Fluids Dolomies hydrothermales présentes dans les carbonates de la plate-forme albienne précoce (Crétacé; NO de l’Espagne : nature et origine des dolomies et des fluides dolomitisants

Directory of Open Access Journals (Sweden)

Shah M.M.

2012-02-01

Full Text Available This study documents the temporal and lateral variation in petrographic and geochemical signatures of fault-related dolomite bodies in the Ranero and El-Moro areas (Karrantza valley, Cantabrian mountains; NW Spain. These dolomite bodies are hosted in Albian carbonates, which were deposited in the Basque-Cantabrian Basin as a result of an intense rift-related subsidence with associated faulting along various orientations. Fluid circulations generated replacive and cement dolomites, paragenetically followed by various calcite cements. Petrography, mineralogical and geochemical investigations (XRD, ICP, XRF, stable and Sr isotopes helped in distinguishing hydrothermal stages. Two major dolomite facies were observed according to their Fe-content. Early dolomites are ferroan and replace limestone more significantly than the later, non ferroan dolomites. Dolomites are generally stoichiometric (49.76 to 51.59 M% CaCO3 and exhibit a broad range of depleted δ18O values (–18.7 to –10.5‰ V-PDB, which may indicate multiphase dolomitisation and/or different degrees of recrystallisation. Decreasing δ18O values correlate with decreasing Fe content in dolomites. In the Ranero area, dolomites show less slightly depleted δ13C values (–0.15 to +2.13‰ V-PDB relative to the host limestone δ13C signature, while these values are substantially more depleted in El-Moro area (down to –2.18‰ V-PDB. Hydrothermal calcites predating dolomitisation show less depleted δ18O values (–14.15 to –12.1‰ V-PDB than postdolomitisation calcite (–18.1‰ V-PDB. Sr isotope data suggest that the fluids interacted with siliciclastic lithologies (sandstone, shale. The dolomite fabric is variably altered through dedolomitisation and cataclastic deformation. Dolomitisation occurred in at least two main episodes. A first episode of pervasive ferroan dolomitisation probably resulted from compactional dewatering of basinal fluids from the nearby Basque trough and

Notes on the marine algae of the International Biosphere Reserve Seaflower, Caribbean Colombia VI: New records of Phaeophyceae from Old Providence and Santa Catalina.

Directory of Open Access Journals (Sweden)

Viviana Patricia Reyes-Gómez

2017-05-01

Full Text Available Two species of brown algae (Phaeophyceae, Bachelotia antilarum (Grunow Gerloff and Dictyota humifusa Hörnig, Schnetter & Coppejans, are reported for the first time for the Archipelago of San Andrés, Old Providence and Sainte Cataline, part of the International Biosphere Reserve Seaflower.

Afståelsesret og andre former for lejerskifte

DEFF Research Database (Denmark)

Faber, Louise

Afståelsesret og andre former for lejerskifte indeholder en analyse af lejerens adgang til at overdrage sit lejemål til en ny lejer.  Bogen bygger på forfatterens ph.d. afhandling.  Bogen er opdelt i to dele, en almindelig del, og en speciel del. I bogens almindelige del undersøges spørgsmålet, om...... lejerens ret til lejerskifte, når der ikke er taget stilling i lejeaftalen. Her fastlægges baggrundsretten med udgangspunkt i de obligationsretlige grundsætninger. I denne kontekst beskrives fremlejeretten, lejerens nærtståendes forsættelses- eller overtagelsesret ved lejrens død, skilsmisse m.v., og...... tillige retstillingen når lejeaftalen er indgået med flere lejere, et I/S, et ApS eller et A/S.  I bogens specielle del undersøges lejerens ret til at afstå eller genindtræde lejeforholdet, når lejerens har afståelsesret og genindtrædelsesret ifølge af lejeaftalen. Denne undersøgelse berører udlejerens...

75 FR 15611 - Safety Zone; United Portuguese SES Centennial Festa, San Diego Bay, San Diego, CA

Science.gov (United States)

2010-03-30

...-AA00 Safety Zone; United Portuguese SES Centennial Festa, San Diego Bay, San Diego, CA AGENCY: Coast... navigable waters of the San Diego Bay in support of the United Portuguese SES Centennial Festa. This... Centennial Festa, which will include a fireworks presentation originating from a tug and barge combination in...

APA/APAGS Award for Distinguished Graduate Student in Professional Psychology: Octavio Andres Santos.

Science.gov (United States)

2017-12-01

The APA/APAGS Award for Distinguished Graduate Student in Professional Psychology is awarded annually by the APA Board of Professional Affairs (BPA) and the American Psychological Association of Graduate Students (APAGS) to a graduate student who has demonstrated outstanding practice and application of psychology. The 2017 award winner is Octavio Andres Santos, who has demonstrated through several initiatives "effective engagement with advocacy, professional organizations, and research in the area of health disparities and multicultural/multilingual assessment." Santos's award citation, biography, and a selected bibliography are presented here. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Evaluation of a Voluntary Tutoring Program in Chemistry, Physics and Mathematics for First-Year Undergraduates at Universidad Andres Bello, Chile

Science.gov (United States)

Jiménez, Verónica A.; Acuña, Fabiola C.; Quiero, Felipe J.; López, Margarita; Zahn, Carmen I.

2015-01-01

This work describes the preliminary results of a tutoring program that provides personalized academic assistance to first-year undergraduates enrolled in introductory chemistry, physics and mathematics courses at Universidad Andres Bello (UNAB), in Concepción, Chile. Intervened courses have historically large enrolments, diverse student population…

Pierre Darriulat is awarded the André Lagarrigue Prize

CERN Multimedia

2009-01-01

Pierre Darriulat at the VATLY Laboratory in Hanoï. Former CERN Research Director, Pierre Darriulat, who is now Professor of Physics at VATLY in Hanoi (Vietnam), has won the 2008 André Lagarrigue Prize. This prize, instituted by the Linear Accelerator Laboratory (LAL) at Orsay under the aegis of the French Physical Society, is awarded to front-line researchers who have had responsibility for machine/detector construction and derived maximum scientific benefit from such projects, performed in a French laboratory or in close collaboration with French groups. Pierre Darriulat has received the award in recognition of his outstanding career at the CEA, at LBL (Berkeley) and at CERN from 1964 onwards. At CERN he managed the experiments at the Intersecting Storage Rings (ISR) before taking charge of the UA2 collaboration from 1980 to 1986, which participated in decisive discoveries at the ppbar collider. In particular, in 1982, the UA2 experiment began observing high trans...

André-Louis Cholesky mathematician, topographer and army officer

CERN Document Server

Brezinski, Claude

2014-01-01

Outside the professional circles of topography and applied mathematics, the life and work of André-Louis Cholesky (1875–1918) are still relatively unknown to the scientific community. This new book appreciably widens the exposure of his remarkable personal achievements in topography and mathematics to a much larger international audience.   Cholesky is also interesting to historians because he is a perfect representative of the "scientists engineers" that, since the early 19th century, had issued from the French scientific high schools. Because they had received a high level of mathematical education, they were able to innovate in their practice of engineering. In the case of Cholesky, this resulted in original contributions in artillery, topography, numerical analysis and graphical calculation. In addition, the book places his education and works within the history of several European countries through the 17th to 19th centuries.   The book begins with Cholesky's biography, followed by his family’s hi...

Performance of BATAN-SANS instrument

Energy Technology Data Exchange (ETDEWEB)

Ikram, Abarrul; Insani, Andon [National Nuclear Energy Agency, P and D Centre for Materials Science and Technology, Serpong (Indonesia)

2003-03-01

SANS data from some standard samples have been obtained using BATAN-SANS instrument in Serpong. The experiments were performed for various experimental set-ups that involve different detector positions and collimator lengths. This paper describes the BATAN-SANS instrument briefly as well as the data taken from those experiments and followed with discussion of the results concerning the performance and calibration of the instrument. The standard samples utilized in these experiments include porous silica, polystyrene-poly isoprene, silver behenate, poly ball and polystyrene-poly (ethylene-alt-propylene). Even though the results show that BATAN-SANS instrument is in good shape, but rooms for improvements are still widely open especially for the velocity selector and its control system. (author)

A case for historic joint rupture of the San Andreas and San Jacinto faults

OpenAIRE

Lozos, Julian C.

2016-01-01

The San Andreas fault is considered to be the primary plate boundary fault in southern California and the most likely fault to produce a major earthquake. I use dynamic rupture modeling to show that the San Jacinto fault is capable of rupturing along with the San Andreas in a single earthquake, and interpret these results along with existing paleoseismic data and historic damage reports to suggest that this has likely occurred in the historic past. In particular, I find that paleoseismic data...

Analysis of pumping tests of the Culebra dolomite conducted at the H-11 hydropad at the Waste Isolation Pilot Plant (WIPP) site

International Nuclear Information System (INIS)

Saulnier, G.J. Jr.

1987-01-01

The Culebra Dolomite Member of the Permian Rustler Formation was hydrologically evaluated in a series of pumping tests conducted at the H-11 hydropad at the Waste Isolation Pilot Plant (WIPP) site. At H-11, the Culebra dolomite is a 25-ft thick argillaceous dolomite with 0.1- to 0.5-foot thick layers with a high density of vugs. The vugs range in size from 0.1 to 0.5 inches in diameter; most are 0.1 to 0.2 inches in diameter. The thin vuggy layers alternate with thicker, more competent layers which have few vugs, but which do contain high-angle fractures. Some of the vugs and fractures are gypsum-filled. Three pumping tests consisted of 12- to 21-hour pumping periods at each of the three wells, while using the other two wells at the hydropad as observation wells. An additional pumping test was conducted at H-11b3 with H-11b1 and H-11b2 as observation wells. The test was a 32-day multirate test with four pumping and recovery periods. The original tests were conducted by lowering a submersible pump and pressure transducers in the boreholes. The additional test added a downhole packer with feed-through assembly designed to isolate the test interval and reduce or minimize the effect of wellbore storage. The data from all tests were recorded and stored on floppy disks. The pumping tests at the H-11 hydropad were analyzed with the INTERPRET reservoir-analysis software. 46 refs., 46 figs., 12 tabs

Stygofauna of the Canary Islands, 4. Liagoceradocus acutus Andres, 1978, a blind anchihaline amphipod from Lanzarote: redescription, taxonomic status and occurrence

NARCIS (Netherlands)

Rondé-Broekhuizen, Brigitte L.M.; Stock, Jan H.

1987-01-01

Liagoceradocus acutus Andres, 1978, has been found in different localities on Lanzarote, Canary Islands. A redescription is provided and the taxonomic status of the genus Liagoceradocus is discussed. The species shows sexual dimorphism mainly in the morphology of the propodus of gnathopods 1 and 2,

Puentes de Saint-André-de-Cubzac y de Angers Francia

Directory of Open Access Journals (Sweden)

Mathivat, J.

1978-02-01

Full Text Available The development of the technique of prefabricated voussoir bridges during the past years has been made possible by the progress achieved in various fields which are developed here, namely: 1 the improvement of the joint between arch stones by the adoption of multiplenotch joints where the adhesive plays a less important part, 2 the increase ín the cross dimensions of the voussoirs as well as in their unit weight, which reduces the number of joints, as well as the diversification of the forms, which can lead to the elimination of the cross prestress, 3 the improvement of the methods of placing and of the design of the lifting rigs: mobile lifting equipement carried by the deck, launching girder. The study of these different factors is supplemented and illustrated by the presentation of two recent works: the freeway bridges of Saint-André-de-Cubzac and the bridge on the Loire near Angers.

El desarrollo de la técnica de los puentes de dovelas prefabricadas ha experimentado un fuerte incremento, durante los últimos años, a causa de: 1 Mejoramiento de las juntas entre dovelas, por adopción de sistemas dotados de dentado múltiple, en cuyo caso el papel de la cola es menos primordial. 2 Aumento de las dimensiones transversales de las dovelas, así como de su peso unitario, lo cual reduce el número de juntas, así como la diversificación de las formas, con lo cual se puede conseguir la supresión del pretensado transversal. 3 Mejoras introducidas en los métodos de colocación y en el diseño de los aparatos de elevación: equipo móvil de elevación soportado por el propio tablero, viga de lanzamiento. El estudio de estos distintos factores se ha ilustrado con la presentación de dos obras recientemente ejecutadas, a saber: los puentes de autopista de Saint-André-de-Cubzac y el puente del Loira, cerca de Angers.

San Marco C-2 (San Marco-4) Post Launch Report No. 1

Science.gov (United States)

1974-01-01

The San Marco C-2 spacecraft, now designated San Marco-4, was successfully launched by a Scout vehicle from the San Marco Platform on 18 February 1974 at 6:05 a.m. EDT. The launch occurred 2 hours 50 minutes into the 3-hour window due co low cloud cover at the launch site. All spacecraft subsystems have been checked and are functioning normally. The protective caps for the two U.S. experiments were ejected and the Omegatron experiment activated on 19 February. The neutral mass spectrometer was activated as scheduled on 22 February after sufficient time to allow for spacecraft outgassing and to avoid the possibility of corona occurring. Both instruments are performing properly and worthwhile scientific data is being acquired.

77 FR 34988 - Notice of Inventory Completion: San Diego State University, San Diego, CA

Science.gov (United States)

2012-06-12

.... ACTION: Notice. SUMMARY: San Diego State University Archeology Collections Management Program has... that believes itself to be culturally affiliated with the human remains and associated funerary objects may contact San Diego State University Archeology Collections Management Program. Repatriation of the...

Mill tailings based composites as paste backfill in mines of U-bearing dolomitic limestone ore

Directory of Open Access Journals (Sweden)

Sandeep Panchal

2018-04-01

Full Text Available This paper elaborates on the development of paste backfill using mill tailings generated during the processing of a uranium ore deposit hosted in dolomitic limestone. The tailings have been characterized in terms of the physical, chemical and mineralogical properties. Time-dependent rheological behaviors and geotechnical properties of cemented paste backfill (CPB are also determined. The studies show that the mill tailing has the potential to form paste and the CPB has adequate strength to provide support to mine pillars, roofs, and walls. Keywords: Mining engineering, Uranium ore deposit, Tailings, Cemented paste backfill (CPB, Rheology, Compressive strength

Die Kunst der Projektion. Romantik und Dekonstruktion in den Filmen André Téchinés

OpenAIRE

Merlin, Dieter

2012-01-01

Thema der vorliegenden Untersuchung sind die Dekonstruktionsmechanismen, mit deren Hilfe metaphysisch begründete Liebeskonzeptionen in den Filmen des französischen Post-Nouvelle-Vague-Regisseurs André Téchiné (geb. 1943) einer kinematographischen Kritik unterworfen werden. Diese Mechanismen werden anhand einer Auswahl von fünf Filmen – HÔTEL DES AMÉRIQUES (1981), LES ROSEAUX SAUVAGES (1994), LES VOLEURS (1996), LOIN (2001) und LES TEMPS QUI CHANGENT (2004) – sowohl unter ästhetisch-formalen a...

Earthworm (Clitellata: Megadrili taxonomy in the last 200 years: A homage to András Zicsi (1928−2015

Directory of Open Access Journals (Sweden)

Csuzdi, Cs.

2016-03-01

Full Text Available Prof. Dr. András Zicsi, the renowned soil biologist and earthworm taxonomist passed away on 22 July, 2015 at the age of 87. To honour his enormous contribution in exploring earthworm biodiversity all over the world, we provide a brief, albeit subjective overview of the history of earthworm taxonomy in the last two century.

The interior capture of life. Le Corbusier and André Malraux

Directory of Open Access Journals (Sweden)

Ana Sofía Pereira da Silva

2016-05-01

Writings from both authors and architectural projects from Le Corbusier –  Mundial Museum, Mundaneum and Museum of Unlimited Growth- will be observed in order to map the existent affinities between the two authors. However, life’s pragmatic circumstances often oppose what uses to be in accordance. André Malraux’s classification of the Villa Savoye, while he was  Minister of the Cultural Affairs, aimed to save one of Le Corbusier’s  masterpieces. Nevertheless, this action banned the architect the possibility to transform the Villa Savoye into a new program (in a first approach and, finally, excluded him the possibility of authorship of the rehabilitation project, which was subsequently entrusted to an architect working in the National Monuments bureau. This suspected moment of friction between the two authors shall be motive of observation.

A NEW LEPIDOSAUROMORPH REPTILE FROM THE MIDDLE TRIASSIC OF THE DOLOMITES (NORTHERN ITALY

Directory of Open Access Journals (Sweden)

SILVIO RENESTO

2003-11-01

Full Text Available A new genus and species of diapsid reptile is described. The specimen was collected from the Anisian (Middle Triassic succession of Monte Prà della Vacca (Kühwiesenkopf in the Dolomites of Braies (Bolzano/Bozen, Northern Italy. Despite being incomplete, the specimen shows enough characters to allow its placement within Lepidosauriformes, close to the Middle Jurassic genus Marmoretta. The importance of this find lies in the great rarity of lepidosauriforms of Anisian age, an epoch approximating the appearance of the first members of the true Lepidosauria (rhyncocephalians and squamates. The new genus may thus add knowledge to the diversity of early lepidosaurians. Some characters of the skeleton, mainly of the forelimb, suggest a terrestrial, perhaps arboreal life style. 

Estonian Golf Countri Club'i Jägala golfiklubi sisekujundus. Jõelähtme, Mannila küla / Juta Lember, Andres Siim, Tarmo Luisk...[jt.

Index Scriptorium Estoniae

2006-01-01

3 korruste plaani, värv. välisvaade, 22 sisevaadet; fotod: Kalle Veesaar; Juta Lember projekteeris ka tammepuust mööbli; arhitekt Andres Siim; nõupidamisruumi toolide ja nagide autor: Toivo Raidmets; metallvalgustite autor: Tarmo Luisk

Andre Hellegers and Carroll House: architect and blueprint for the Kennedy Institute of Ethics.

Science.gov (United States)

Harvey, John Collins

2004-06-01

The Newman programs established at secular colleges and universities provided an opportunity for intellectual, spiritual, and social growth among the Catholic student population. As a young physician and junior medical faculty member, Andre Hellegers took part in the early organization and ongoing work of Carroll House, the Newman Center at the Johns Hopkins Medical Institutions. Helleger's experience at Carroll House enabled him to develop a clear blueprint of an academic center of excellence for the scientific, theological, and philosophical exploration of the many problems that he had seen and foresaw in medicine. That center would become Georgetown's Kennedy Institute of Ethics.

André Blumel, un itinéraire sioniste à la croisée des chemins

OpenAIRE

Lafon, François

2009-01-01

Cet article envisage à travers l’itinéraire sioniste d’André Blumel les relations entre la gauche française et l’État d’Israël. Proche de Léon Blum, dont il fut directeur de Cabinet durant le Front populaire, mais se rapprochant progressivement des communistes, Blumel demeura jusqu’en 1966 une figure clefs des milieux sionistes français. Conciliant divers engagements – pourtant apparemment contradictoires – son parcours permet de comprendre la complexité des liens et des conflits qui caractér...

Jovens de Santo André, SP, Brasil: Um estudo sobre valores em diferentes grupos sociais

OpenAIRE

Sheila Aparecida Ferreira Lachtim

2010-01-01

Esta dissertação se propõe a: apreender valores sociais contemporâneos, notadamente aqueles referidos ao consumo de drogas, discutir diferenças entre esses valores nos diferentes grupos sociais; e analisar possíveis relações entre esses valores. Trata-se de um estudo qualitativo de caráter exploratório, descritivo e analítico que utilizou um roteiro de entrevista semi-estruturada para apreensão do objeto. Um total de 86 jovens participou, de diferentes regiões do município de Santo André, SP,...

78 FR 53243 - Safety Zone; TriRock San Diego, San Diego Bay, San Diego, CA

Science.gov (United States)

2013-08-29

... this rule because the logistical details of the San Diego Bay triathlon swim were not finalized nor... September 22, 2013. (c) Definitions. The following definition applies to this section: Designated...

Tracing the development of contemporary park-city relationships : Parc de La Villette and Parc André Citroën (paper + presentation)

NARCIS (Netherlands)

Van der Velde, J.R.T.

2012-01-01

Since the late post--?war period the relationship between park and city has significantly altered. Parks established between 1980 and 2000 in Paris --? in particular Parc de La Villette and Parc André Citroën – exemplify developments in park design and the park--?city relationship in this period and

Epidemiología de la enfermedad de Chagas en el municipio Andrés Eloy Blanco, Lara, Venezuela: infestación triatomínica y seroprevalencia en humanos Epidemiology of Chagas disease in Andrés Eloy Blanco, Lara, Venezuela: triatomine infestation and human seroprevalence

Directory of Open Access Journals (Sweden)

Claudina Rodríguez-Bonfante

2007-05-01

Full Text Available Se realizó un despistaje serológico y recolección de vectores en cuatro comunidades rurales del municipio Andrés Eloy Blanco, Estado Lara, Venezuela. La muestra fue escogida en forma sistemática y aleatoria basada en conglomerados familiares. Se muestrearon 869 habitantes para determinar anticuerpos anti-Trypanosoma cruzi y anti-Leishmania sp. por inmunofluorescencia indirecta, aceptando como positivo diluciones > a 1:32 para anticuerpos anti-T. cruzi no reactivos para antígenos de Leishmania sp., obteniendo una frecuencia de anticuerpos en la muestra de 6,9% (n = 60; de los cuales 46,66% son femeninos, 53,33% masculinos y 60% mayores de 40 años. Se observó que 5 (8,33% de los seropositivos eran menores de 10 años y 10 (16,66% menores de 20 años. Rhodnius prolixus y Panstrongylus geniculatus fueron los triatominos capturados, con índice de infestación de 1,9 y 10,54%, índice de colonización, del 0 y 18,18% en las viviendas infestadas e índice de infección a T. cruzi del 20 y 5,07%, respectivamente. Los resultados sugieren que existe una transmisión activa de la enfermedad de Chagas en el Municipio Andrés Eloy Blanco en las últimas dos décadas y que P. geniculatus está substituyendo a R. prolixus como vector de la enfermedad de Chagas.A seroepidemiological survey and vector captures were performed in four rural communities in Andrés Eloy Blanco, Lara State, Venezuela. Systematic random sampling was based on family clusters, with samples drawn from 869 individuals to determine anti-Trypanosoma cruzi and anti-Leishmania sp. antibodies by indirect immunofluorescence. Positive individuals were defined as > 1:32 for anti-T. cruzi antibody and non-reactive to Leishmania sp. antigen, revealing an antibody frequency of 6.9% (n = 60, of whom 46.66% were females and 53.33% males and 60% were over 39 years of age. Some 5 (8.33% seropositive individuals were under 10 years of age and 10 (16.66% under 20 years. Rhodnius prolixus and

Process optimisation of microwave-assisted extraction of peony ( Paeonia suffruticosa Andr .) seed oil using hexane-ethanol mixture and its characterisation

Science.gov (United States)

Xiaoli Sun; Wengang Li; Jian Li; Yuangang Zu; Chung-Yun Hse; Jiulong Xie; Xiuhua Zhao

2016-01-01

Ethanol and hexane mixture agent microwave-assisted extraction (MAE) method was conducted to extract peony (Paeonia suffruticosa Andr.) seed oil (PSO). The aim of the study was to optimise the extraction for both yield and energy consumption in mixture agent MAE. The highest oil yield (34.49%) and lowest unit energy consumption (14 125.4 J g -1)...

77 FR 59969 - Notice of Inventory Completion: San Francisco State University, Department of Anthropology, San...

Science.gov (United States)

2012-10-01

... Inventory Completion: San Francisco State University, Department of Anthropology, San Francisco, CA... Francisco State University, NAGPRA Program (formerly in the Department of Anthropology). The human remains... State University Department of Anthropology records. In the Federal Register (73 FR 30156-30158, May 23...

Carbonatitic liquids and COH fluids from epidote-dolomite eclogites at 3.7 - 4.6 GPa: new perspectives on carbon transfer at subduction zones

Science.gov (United States)

Poli, S.

2013-12-01

Current knowledge on the solidus temperature for carbonate-bearing rocks suggests that carbonatitic liquids should not form in a subducted oceanic lithosphere, unless anomalous thermal relaxation occurs. For a mildly warm subduction path, COH-bearing basaltic eclogites are expected to loose all H2O component at epidote breakdown, located at approx. 2.8-3.0 GPa. Above this pressure limit, the solidus is that of a carbonated basaltic eclogite which shows a minimum temperature of 1020 °C at 4.0-4.5 GPa (Dasgupta et al. 2004). However, the oceanic crust includes a range of gabbroic rocks, altered on rifts and transforms, with large amounts of An-rich plagioclase. It has been shown that epidote disappearance with pressure depend on the normative anorthite content of the bulk composition considered (Poli et al. 2009); we therefore expect that altered gabbros might display a much wider pressure range where epidote persists, potentially affecting the solidus relationships. Notably, this applies to epidosite rocks formed in hydrothermal environments at oceanic settings, then recovered in high-pressure and ultra-high pressure terrains. New experimental data from 3.7 to 4.6 GPa, 750°C to 1000 °C are intended to unravel the effect of variable bulk and volatile compositions in model eclogites, enriched in the normative anorthite component (An37 and An45). Experiments are performed in piston cylinder and multianvil machines apparatus, using both single and, buffered, double capsule techniques. Garnet, clinopyroxene and coesite form in all syntheses. Lawsonite was found to persist at 3.7 GPa, 750 °C, with both dolomite and magnesite; at 3.8 GPa, 775-800 °C, fluid saturated conditions, epidote coexists with kyanite, dolomite and magnesite. The anhydrous assemblage garnet, omphacite, aragonite, kyanite is found at 4.2 GPa, 850 °C. At 900 °C, fluid-rich conditions, a silicate fluid/melt of granitoid composition, a carbonatitic melt and Na-carbonate are observed. Close to

Age and geochemistry of the Newania dolomite carbonatites, India: implications for the source of primary carbonatite magma

Science.gov (United States)

Ray, Jyotiranjan S.; Pande, Kanchan; Bhutani, Rajneesh; Shukla, Anil D.; Rai, Vinai K.; Kumar, Alok; Awasthi, Neeraj; Smitha, R. S.; Panda, Dipak K.

2013-12-01

The Newania carbonatite complex of India is one of the few dolomite-dominated carbonatites of the world. Intruding into Archean basement gneisses, the rocks of the complex have undergone limited diversification and are not associated with any alkaline silicate rock. Although the magmatic nature of the complex was generally accepted, its age of emplacement had remained equivocal because of the disturbed nature of radioisotope systems. Many questions about the nature of its mantle source and mode of origin had remained unanswered because of lack of geochemical and isotopic data. Here, we present results of our effort to date the complex using 147Sm-143Nd, 207Pb-206Pb and 40Ar-39Ar dating techniques. We also present mineral chemistry, major and trace element geochemistry and Sr-Nd isotopic ratio data for these carbonatites. Our age data reveal that the complex was emplaced at ~1,473 Ma and parts of it were affected by a thermal event at ~904 Ma. The older 207Pb-206Pb ages reported here (~2.4 Ga) and by one earlier study (~2.3 Ga; Schleicher et al. Chem Geol 140:261-273, 1997) are deemed to be a result of heterogeneous incorporation of crustal Pb during the post-emplacement thermal event. The thermal event had little effect on many magmatic signatures of these rocks, such as its dolomite-magnesite-ankerite-Cr-rich magnetite-magnesio-arfvedsonite-pyrochlore assemblage, mantle like δ13C and δ18O and typical carbonatitic trace element patterns. Newania carbonatites show fractional crystallization trend from high-Mg to high-Fe through high-Ca compositions. The least fractionated dolomite carbonatites of the complex possess very high Mg# (≥80) and have similar major element oxide contents as that of primary carbonatite melts experimentally produced from peridotitic sources. In addition, lower rare earth element (and higher Sr) contents than a typical calcio-carbonatite and mantle like Nb/Ta ratios indicate that the primary magma for the complex was a magnesio

33 CFR 165.1182 - Safety/Security Zone: San Francisco Bay, San Pablo Bay, Carquinez Strait, and Suisun Bay, CA.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Safety/Security Zone: San... Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PORTS AND WATERWAYS SAFETY... Areas Eleventh Coast Guard District § 165.1182 Safety/Security Zone: San Francisco Bay, San Pablo Bay...

In Developping a Bench-Scale Circulating Fluidized Bed Combustor to Burn High Ash Brazilian Coal-Dolomites Mixtures

Science.gov (United States)

Ramírez Behainne, Jhon Jairo; Hory, Rogério Ishikawa; Goldstein, Leonardo; Bernárdez Pécora, Araí Augusta

This work considers some of the questions in burning high ash Brazilian coal-dolomite mixtures in a bench-scale circulating fluidized bed combustor (CFBC). Experimental tests were performed with the CE4500 coal from Santa Catarina State, in southern Brazil, with a Sauter mean diameter d p =43 μm. The coal particles were mixed with dolomite particles of d p = 111 μm and this fuel mixture was fed into the circulating fluidized reactor, previously loaded with quartz sand particles of d p =353 μm. This inert material was previously heated by the combustion of liquefied petroleum gas up to the ignition temperature of the fuel mixture. The CFBC unit has a 100mm internal diameter riser, 4.0m high, as well as a 62.8mm internal diameter downcomer. The loop has a cyclone, a sampling valve to collect particles and a 62.8mm internal diameter L-valve to recirculate the particles in the loop. A screw feeder with a rotation control system was used to feed the fuel mixture to the reactor. The operational conditions were monitored by pressure taps and thermocouples installed along the loop. A data acquisition system showed the main operational conditions to control. Experimental tests performed put in evidence the problems found during bed operation, with special attention to the solids feed device, to the L-valve operation, to particle size, solids inventory, fluidized gas velocity, fuel mixture and recirculated solids feeding positions.

SAN MICHELE. ENTRE CIELO Y MAR / San Michele, between sky and sea

Directory of Open Access Journals (Sweden)

Pablo Blázquez Jesús

2012-11-01

Full Text Available RESUMEN El cementerio es uno de los tipos arquitectónicos más profundos y metafóricos. El concurso para la ampliación del cementerio de San Michele, convocado en 1998 por la administración Municipal de Venecia, se convierte en un excelente campo de pruebas sobre el que poder analizar el contexto histórico en torno a esta tipología, y su relación con la ciudad y el territorio. El estudio de este caso concreto nos permite descubrir personajes, relaciones casuales y hallazgos que se despliegan a lo largo del texto. La historia del cementerio de San Michele es también la crónica de la transformación de la ciudad de Venecia y su Laguna. Interpretando este concurso como un instrumento de investigación, el objetivo del artículo es el de comprender la realidad contemporánea de la arquitectura funeraria a través de la isla de San Michele, Venecia, y las propuestas finalistas de Carlos Ferrater, Enric Miralles y David Chipperfield. Una historia bajo la cual se vislumbran claves que nos sirven para reflexionar acerca del cementerio contemporáneo, la ciudad y el territorio. SUMMARY The cemetery is one of the most profound and metaphorical kinds of architecture. The competition for the extension of the San Michele Cemetery, called in 1998 by the Venice municipal administration, is an excellent testing ground on which to analyse the historical context surrounding this type of architecture, and its relationship with the city and the region. The study of this particular case allows us to uncover characters, casual relationships and findings that unfold throughout the text. The history of the San Michele cemetery is also the chronicle of the transformation of the city of Venice and its Lagoon. Interpreting this competition as a research tool, the aim of the paper is to understand the contemporary reality of funerary architecture through the island of San Michele, Venice, and the finalist proposals of Carlos Ferrater, Enric Miralles and David

Pleistocene Brawley and Ocotillo Formations: Evidence for initial strike-slip deformation along the San Felipe and San Jacinto fault zonez, Southern California

Science.gov (United States)

Kirby, S.M.; Janecke, S.U.; Dorsey, R.J.; Housen, B.A.; Langenheim, V.E.; McDougall, K.A.; Steeley, A.N.

2007-01-01

We examine the Pleistocene tectonic reorganization of the Pacific-North American plate boundary in the Salton Trough of southern California with an integrated approach that includes basin analysis, magnetostratigraphy, and geologic mapping of upper Pliocene to Pleistocene sedimentary rocks in the San Felipe Hills. These deposits preserve the earliest sedimentary record of movement on the San Felipe and San Jacinto fault zones that replaced and deactivated the late Cenozoic West Salton detachment fault. Sandstone and mudstone of the Brawley Formation accumulated between ???1.1 and ???0.6-0.5 Ma in a delta on the margin of an arid Pleistocene lake, which received sediment from alluvial fans of the Ocotillo Formation to the west-southwest. Our analysis indicates that the Ocotillo and Brawley formations prograded abruptly to the east-northeast across a former mud-dominated perennial lake (Borrego Formation) at ???1.1 Ma in response to initiation of the dextral-oblique San Felipe fault zone. The ???25-km-long San Felipe anticline initiated at about the same time and produced an intrabasinal basement-cored high within the San Felipe-Borrego basin that is recorded by progressive unconformities on its north and south limbs. A disconformity at the base of the Brawley Formation in the eastern San Felipe Hills probably records initiation and early blind slip at the southeast tip of the Clark strand of the San Jacinto fault zone. Our data are consistent with abrupt and nearly synchronous inception of the San Jacinto and San Felipe fault zones southwest of the southern San Andreas fault in the early Pleistocene during a pronounced southwestward broadening of the San Andreas fault zone. The current contractional geometry of the San Jacinto fault zone developed after ???0.5-0.6 Ma during a second, less significant change in structural style. ?? 2007 by The University of Chicago. All rights reserved.

Reduction of H{sub 2} S during the mineral coal gasification by using dolomite addition in a fluidized bed reactor; Diminuicao de H{sub 2} S na gaseificacao de carvao mineral mediante adicao de dolomita em reator de leito fluidizado

Energy Technology Data Exchange (ETDEWEB)

Behanie, John Jairo Ramirez [Universidad Pontificia Bolivariana, Medellin (Colombia). Centro de Investigaciones para el Desarrollo Integral. Grupo de Investigaciones Ambientales]. E-mail: jbehaine@logos.upb.edu.co; Sanches, Caio Glauco [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Dept. de Engenharia Termica e de Fluidos]. E-mail: caio@fem.unicamp.br

2000-07-01

Brazilian mineral coal from Candiota mine (Rio Grande do Sul State) was gasified with air in a atmospheric fluidized bed reactor at laboratory scale. Experimental essays carried out in a 0.2 m internal diameter reactor permitted both, to evaluate the gasifier operation at different air factors without dolomite particles addition, and to study the effect adsorbent on the capture hydrogen sulfide (H2 S), contained in the generated gas. Test were done with and without the use of dolomite. Without using dolomite, the maximum gas lower heating value was 2.2 MJ/N m3 and the cold gas thermal efficiency was close to 43%, operating at an air factor between 0.45 and 0.60. During the experimental test with dolomite , a maximum reduction of 58% for H2 S was attained using a molar ratio of Ca/S equal to 4. Literature review showed higher capture efficiencies, even at lower molar ratio (Ca/S). Variances were probably caused by low residence times in the gas-solid interaction, considering the used bubble fluidization regime. (author)

Examining the interplay of climate and low amplitude sea-level change on the distribution and volume of massive dolomitization: Zebbag Formation, Cretaceous, Southern Tunisia

DEFF Research Database (Denmark)

Newport, Richard; Hollis, Cathy; Bodin, Stéphane

2017-01-01

During the Cretaceous, a humid global climate, calcitic seas, high relative sea-level and low amplitude changes in relative sea-level largely prevented large-scale dolomitization in many carbonate successions. However, the well-exposed shallow-water carbonate sediments of the Upper Albian–Lower T...

André Gide en Égypte : l’inachèvement et la créativité

Directory of Open Access Journals (Sweden)

Elizabeth Geary Keohane

2014-12-01

Full Text Available Cet article analyse un ouvrage d’André Gide, Carnets d’Égypte, dans le contexte de ‘late style’, un concept adornien développé par Edward Said. Bien que Carnets d’Égypte représente un des derniers ouvrages de Gide, il ne s’agit pas d’une tentative de créer une impression de complétude ni de couronner une œuvre variée. C’est plutôt un espace créatif où il peut se permettre de se concentrer sur l’inachèvement. Nous examinons donc ce que Gide a choisi de ne pas ‘terminer’ ou même de ne pas ‘finaliser’ – le voyage lui-même et surtout le processus d'écriture qui s'ensuit. Pour Said, ‘late style’ est une attitude que nous pouvons déceler chez certains auteurs qui se trouvent devant la mort. Se concentrer sur l’inachèvement et non sur la complétude dans un tel cas révèle une certaine résistance chez Gide qui est tout de même productive, car elle arrive à faire avancer le processus d’écriture. André Gide in Egypt: the Unfinished and the Creative Process This article analyses a work by André Gide, Carnets d’Égypte, in the context of 'late style', an Adornian concept developed by Edward Said. Although Carnets d’Égypte is one of Gide’s final works, it does not attempt to create a sense of completeness nor does it attempt to crown a varied body of work. It is instead a creative space where he can allow himself to concentrate on the incomplete or the unfinished. I therefore examine what Gide has chosen not to ‘finish’ or even not to ‘finalise’ – that is, the journey itself and more particularly, the related writing process. For Said, ‘late style’ is an attitude that can be detected in certain authors facing death. Concentrating in such a case on what remains unfinished, instead of on completeness, reveals a certain resistance on Gide’s part which is nonetheless productive, since it manages to advance the writing process.

Bathyodontus mirus (Andrássy, 1956, first record of a representative of the suborder Bathyodontina (Nematoda, Mononchida in the Iberian fauna

Directory of Open Access Journals (Sweden)

Peña-Santiago, R.

2010-12-01

Full Text Available Bathyodontus mirus (Andrássy, 1956 Hopper & Cairns, 1956, collected in sand dunes of SW Iberian peninsula, is studied. Description, measurements and illustrations (LM pictures are provided. Iberian specimens are briefly compared to other known populations of the species. And a compendium of Bathyodontus species, including a key to their identification, is also given. This is the first record of a representative of the nematode suborder Bathyodontina in the Iberian-Balearic range and in the Mediterranean region.Se estudia la especie Bathyodontus mirus (Andrássy, 1956 Hopper y Cairns, 1956, recolectada en dunas de arena en el suroeste peninsular. Se presentan una descripción, medidas e ilustraciones (fotografías con microscopía óptica. Los ejemplares ibéricos se comparan brevemente con otras poblaciones conocidas de la misma especie. Y se ofrece un compendio de las especies del género Bathyodontus, incluida una clave para su identification. Se trata de la primera cita de un miembro del suborden Bathyodontina en el ámbito Ibero-balear y en la región Mediterránea.

Vegetation - San Felipe Valley [ds172

Data.gov (United States)

California Natural Resource Agency — This Vegetation Map of the San Felipe Valley Wildlife Area in San Diego County, California is based on vegetation samples collected in the field in 2002 and 2005 and...

El urbanismo de Santiago de Compostela : un plano con las plazuelas de San Martín y de San Miguel de 1709

Directory of Open Access Journals (Sweden)

Miguel Taín Guzmán

1998-01-01

Full Text Available El presente artículo está dedicado al estudio de un plano inédito de 1709 donde se representan las plazuelas de San Martín y de San Miguel, en el barrio intramuros de la Puerta de la Peña de Santiago de Compostela. Gracias al referido dibujo, analizo al detalle el entramado urbano de ambos espacios públicos y los edificios que los delimitan, particularmente la iglesia de San Martín Pinario, el desaparecido Palacio del Tribunal de la Santa Inquisición y la iglesia parroquial de San Miguel dos Agros.The article focuses on the study of a 1709 inpublished street plan of two squares —San Martín and San Miguel— in the Puerta de la Peña quarter (Santiago de Compostela. This oíd drawing shows the urban framework of both public spaces and also the buildings around: San Martín Pinario, the lost Palacio del Tribunal de la Santa Inquisición and the paroquial church of San Miguel de los Agros.

Recent slope failures in the Dolomites (Northeastern Italian Alps) in a context of climate change

Science.gov (United States)

Chiarle, Marta; Paranunzio, Roberta; Laio, Francesco; Nigrelli, Guido; Guzzetti, Fausto

2014-05-01

Climate change in the Greater Alpine Region is seriously affecting permafrost distribution, with relevant consequences on slope stability. In the Italian Alps, the number of failures from rockwalls at high elevation markedly increased in the last 20-30 years: the consistent temperature increase, which warmed twice than the global average, may have seriously influenced slope stability, in terms of glaciers retreat and permafrost degradation. Moreover, the growing number of tourists and activities in alpine regions (in particular in the Dolomites) made these areas particularly critical in relation to natural hazards. In this light, an integrated short-term geomorphological and climatic analysis was performed, in order to better comprehend the impact of main climate elements (especially temperature and precipitation) on slope failures in high mountain areas. In this contribution, we focus on three recent slope failures occurred at high elevation sites in the Dolomites (Northeastern Italian Alps), declared a UNESCO World Heritage Site in August 2009. We describe here three important rock falls occurred in the autumn 2013: 1) the Sorapiss rock fall, on 30 September 2013; 2) the Monte Civetta rock fall, on 16 November 2013; 3) the Monte Antelao rock fall, on 22 November 2013. The Monte Civetta rock fall damaged some climbing routes, while the other two landslides did not cause any damage or injury. Despite the limited volume involved, these three events represent an important warning sign in the context of ongoing climate change. Geomorphological information about the rock fall sites were combined with the climatic data acquired from the meteorological stations surrounding the slope failure areas. A short-term climatic analysis was performed, with the aim of understanding the role of the main climatic elements in the triggering of natural instability events in this area and in the Alps in general.

78 FR 57482 - Safety Zone; America's Cup Aerobatic Box, San Francisco Bay, San Francisco, CA

Science.gov (United States)

2013-09-19

...-AA00 Safety Zone; America's Cup Aerobatic Box, San Francisco Bay, San Francisco, CA AGENCY: Coast Guard... America's Cup air shows. These safety zones are established to provide a clear area on the water for... announced by America's Cup Race Management. ADDRESSES: Documents mentioned in this preamble are part of...

Application, advantages and limitations of high-density gravimetric surveys compared with three-dimensional geological modelling in dolomite stability investigations

OpenAIRE

Breytenbach, I J; Bosch, P J A

2011-01-01

The article discusses the nature of the gravimetric survey as applied and used in dolomite stability investigations on areas underlain by the Chuniespoort Group in South Africa. A short discussion is given on the gravimetric survey procedure along with its uses and alternative methods. Finally, two case studies illustrate the application of the method on a high-density survey grid spacing in comparison with three-dimensional geological modelling based on the lithology and karst weathering hor...

77 FR 42649 - Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA

Science.gov (United States)

2012-07-20

... 1625-AA00 Safety Zone: Sea World San Diego Fireworks, Mission Bay; San Diego, CA AGENCY: Coast Guard... authorized by the Captain of the Port, or his designated representative. DATES: This rule is effective from 8... to ensure the public's safety. B. Basis and Purpose The Ports and Waterways Safety Act gives the...

Interpretations of Tracer Tests Performed in the Culebra Dolomite at the Waste Isolation Pilot Plant Site

International Nuclear Information System (INIS)

MEIGS, LUCY C.; BEAUHEIM, RICHARD L.; JONES, TOYA L.

2000-01-01

This report provides (1) an overview of all tracer testing conducted in the Culebra Dolomite Member of the Rustler Formation at the Waste Isolation Pilot Plant (WPP) site, (2) a detailed description of the important information about the 1995-96 tracer tests and the current interpretations of the data, and (3) a summary of the knowledge gained to date through tracer testing in the Culebra. Tracer tests have been used to identify transport processes occurring within the Culebra and quantify relevant parameters for use in performance assessment of the WIPP. The data, especially those from the tests performed in 1995-96, provide valuable insight into transport processes within the Culebra. Interpretations of the tracer tests in combination with geologic information, hydraulic-test information, and laboratory studies have resulted in a greatly improved conceptual model of transport processes within the Culebra. At locations where the transmissivity of the Culebra is low ( -6 m 2 /s), we conceptualize the Culebra as a single-porosity medium in which advection occurs largely through the primary porosity of the dolomite matrix. At locations where the transmissivity of the Culebra is high (> 4 x 10 -6 m 2 /s), we conceptualize the Culebra as a heterogeneous, layered, fractured medium in which advection occurs largely through fractures and solutes diffuse between fractures and matrix at multiple rates. The variations in diffusion rate can be attributed to both variations in fracture spacing (or the spacing of advective pathways) and matrix heterogeneity. Flow and transport appear to be concentrated in the lower Culebra. At all locations, diffusion is the dominant transport process in the portions of the matrix that tracer does not access by flow

Cataclastic rocks of the San Gabriel fault—an expression of deformation at deeper crustal levels in the San Andreas fault zone

Science.gov (United States)

Anderson, J. Lawford; Osborne, Robert H.; Palmer, Donald F.

1983-10-01

The San Gabriel fault, a deeply eroded late Oligocene to middle Pliocene precursor to the San Andreas, was chosen for petrologic study to provide information regarding intrafault material representative of deeper crustal levels. Cataclastic rocks exposed along the present trace of the San Andreas in this area are exclusively a variety of fault gouge that is essentially a rock flour with a quartz, feldspar, biotite, chlorite, amphibole, epidote, and Fe-Ti oxide mineralogy representing the milled-down equivalent of the original rock (Anderson and Osborne, 1979; Anderson et al., 1980). Likewise, fault gouge and associated breccia are common along the San Gabriel fault, but only where the zone of cataclasis is several tens of meters wide. At several localities, the zone is extremely narrow (several centimeters), and the cataclastic rock type is cataclasite, a dark, aphanitic, and highly comminuted and indurated rock. The cataclastic rocks along the San Gabriel fault exhibit more comminution than that observed for gouge along the San Andreas. The average grain diameter for the San Andreas gouge ranges from 0.01 to 0.06 mm. For the San Gabriel cataclastic rocks, it ranges from 0.0001 to 0.007 mm. Whereas the San Andreas gouge remains particulate to the smallest grain-size, the ultra-fine grain matrix of the San Gabriel cataclasite is composed of a mosaic of equidimensional, interlocking grains. The cataclastic rocks along the San Gabriel fault also show more mineralogiec changes compared to gouge from the San Andreas fault. At the expense of biotite, amphibole, and feldspar, there is some growth of new albite, chlorite, sericite, laumontite, analcime, mordenite (?), and calcite. The highest grade of metamorphism is laumontite-chlorite zone (zeolite facies). Mineral assemblages and constrained uplift rates allow temperature and depth estimates of 200 ± 30° C and 2-5 km, thus suggesting an approximate geothermal gradient of ~50°C/km. Such elevated temperatures imply a

Drive-induced delocalization in the Aubry-André model

Science.gov (United States)

Ray, S.; Ghosh, A.; Sinha, S.

2018-01-01

Motivated by the recent experiment by Bordia et al. [Nat. Phys. 13, 460 (2017), 10.1038/nphys4020], we study the single particle delocalization phenomena of the Aubry-André (AA) model subjected to periodic drives. In two distinct cases we construct an equivalent classical description to illustrate that the drive-induced delocalization phenomena stems from an instability and the onset of chaos in the underlying dynamics. In the first case we analyze the delocalization and the thermalization in a time modulated AA potential with respect to driving frequency and demonstrate that there exists a threshold value of the amplitude of the drive. In the next example, we show that the periodic modulation of the phase of the hopping amplitude induced by a gauge field leads to an unusual effect on delocalization with a nonmonotonic dependence on the driving frequency. Within a window of such a driving frequency a delocalized Floquet band with a mobility edge appears, exhibiting multifractality in the spectrum as well as in the Floquet eigenfunctions. Finally, we explore the effect of interaction and discuss how the results of the present analysis can be tested experimentally.

The disappearing San of southeastern Africa and their genetic affinities.

Science.gov (United States)

Schlebusch, Carina M; Prins, Frans; Lombard, Marlize; Jakobsson, Mattias; Soodyall, Himla

2016-12-01

Southern Africa was likely exclusively inhabited by San hunter-gatherers before ~2000 years ago. Around that time, East African groups assimilated with local San groups and gave rise to the Khoekhoe herders. Subsequently, Bantu-speaking farmers, arriving from the north (~1800 years ago), assimilated and displaced San and Khoekhoe groups, a process that intensified with the arrival of European colonists ~350 years ago. In contrast to the western parts of southern Africa, where several Khoe-San groups still live today, the eastern parts are largely populated by Bantu speakers and individuals of non-African descent. Only a few scattered groups with oral traditions of Khoe-San ancestry remain. Advances in genetic research open up new ways to understand the population history of southeastern Africa. We investigate the genomic variation of the remaining individuals from two South African groups with oral histories connecting them to eastern San groups, i.e., the San from Lake Chrissie and the Duma San of the uKhahlamba-Drakensberg. Using ~2.2 million genetic markers, combined with comparative published data sets, we show that the Lake Chrissie San have genetic ancestry from both Khoe-San (likely the ||Xegwi San) and Bantu speakers. Specifically, we found that the Lake Chrissie San are closely related to the current southern San groups (i.e., the Karretjie people). Duma San individuals, on the other hand, were genetically similar to southeastern Bantu speakers from South Africa. This study illustrates how genetic tools can be used to assess hypotheses about the ancestry of people who seemingly lost their historic roots, only recalling a vague oral tradition of their origin.

Play Analysis and Digital Portfolio of Major Oil Reservoirs in the Permian Basin: Application and Transfer of Advanced Geological and Engineering Technologies for Incremental Production Opportunities

Energy Technology Data Exchange (ETDEWEB)

Shirley P. Dutton; Eugene M. Kim; Ronald F. Broadhead; Caroline L. Breton; William D. Raatz; Stephen C. Ruppel; Charles Kerans

2004-01-13

A play portfolio is being constructed for the Permian Basin in west Texas and southeast New Mexico, the largest onshore petroleum-producing basin in the United States. Approximately 1,300 reservoirs in the Permian Basin have been identified as having cumulative production greater than 1 MMbbl (1.59 x 10{sup 5} m{sup 3}) of oil through 2000. Of these significant-sized reservoirs, approximately 1,000 are in Texas and 300 in New Mexico. There are 32 geologic plays that have been defined for Permian Basin oil reservoirs, and each of the 1,300 major reservoirs was assigned to a play. The reservoirs were mapped and compiled in a Geographic Information System (GIS) by play. The final reservoir shapefile for each play contains the geographic location of each reservoir. Associated reservoir information within the linked data tables includes RRC reservoir number and district (Texas only), official field and reservoir name, year reservoir was discovered, depth to top of the reservoir, production in 2000, and cumulative production through 2000. Some tables also list subplays. Play boundaries were drawn for each play; the boundaries include areas where fields in that play occur but are smaller than 1 MMbbl (1.59 x 10{sup 5} m{sup 3}) of cumulative production. Oil production from the reservoirs in the Permian Basin having cumulative production of >1 MMbbl (1.59 x 10{sup 5} m{sup 3}) was 301.4 MMbbl (4.79 x 10{sup 7} m{sup 3}) in 2000. Cumulative Permian Basin production through 2000 was 28.9 Bbbl (4.59 x 10{sup 9} m{sup 3}). The top four plays in cumulative production are the Northwest Shelf San Andres Platform Carbonate play (3.97 Bbbl [6.31 x 10{sup 8} m{sup 3}]), the Leonard Restricted Platform Carbonate play (3.30 Bbbl [5.25 x 10{sup 8} m{sup 3}]), the Pennsylvanian and Lower Permian Horseshoe Atoll Carbonate play (2.70 Bbbl [4.29 x 10{sup 8} m{sup 3}]), and the San Andres Platform Carbonate play (2.15 Bbbl [3.42 x 10{sup 8} m{sup 3}]). Detailed studies of three reservoirs

André Gide au miroir de la critique : "Corydon" entre œuvre et manifeste

OpenAIRE

Abdallah El Sokati , Chahira

2011-01-01

Corydon est un essai dans lequel André Gide soutient une nouvelle théorie de l'amour"pédérastique normal". Il y défend sa position tout en esquissant son identité, et en s'efforçantde faire reconnaître celle-ci à travers son oeuvre. Il répond ainsi à l'inquiétude de toute sagénération, ou au moins d'une élite de cette génération. Gide le dit : Corydon est un livre parlequel il veut " gêner ".La thèse suit les transformations de la réception de Corydon depuis sa publication et étudie lesdiffér...

75 FR 27432 - Security Zone; Golden Guardian 2010 Regional Exercise; San Francisco Bay, San Francisco, CA

Science.gov (United States)

2010-05-17

... can better evaluate its effects on them and participate in the rulemaking process. Small businesses... DEPARTMENT OF HOMELAND SECURITY Coast Guard 33 CFR Part 165 [Docket No. USCG-2010-0221] RIN 1625-AA87 Security Zone; Golden Guardian 2010 Regional Exercise; San Francisco Bay, San Francisco, CA AGENCY...

Karl Andrée (1880-1959) sedimentologist and marine geologist

Science.gov (United States)

Dullo, Wolf-Christian; Pfaffl, Fritz A.

2017-09-01

Karl Andrée began studying questions of sedimentology and oceanography in 1908 when working as an assistant at the University of Marburg and he remained faithful to these subjects until his death in 1959. The vast majority of his scientific contributions, however, were published during his time at the University of Königsberg (1915-1945). There he published his fundamental papers on marine geology, all of which adhered strictly to the principles of uniformitarianism, and helped improve our understanding of sedimentary processes and the stratigraphic record. His scientific work has enormous breadth. In the course of 55 years, he published 124 individual papers and books, some of which became classic textbooks. His versatility is particularly evident in his book "Geology of the Seafloor", which contains many pertinent observations and descriptions still relevant today, even if it has fallen out of fashion. This scientist and university teacher was the first to successfully present the huge field of marine geology in all its facet and to consider the deposition of marine sediments as a function of their geographical distribution.

New Trends in Approximation Theory : in Memory of André Boivin

CERN Document Server

Manolaki, Myrto; Gauthier, Paul

2018-01-01

The international conference entitled "New Trends in Approximation Theory" was held at the Fields Institute, in Toronto, from July 25 until July 29, 2016. The conference was fondly dedicated to the memory of our unique friend and colleague, André Boivin, who gave tireless service in Canada until his very last moment of his life in October 2014. The impact of his warm personality and his fine work on Complex Approximation Theory was reflected by the mathematical excellence and the wide research range of the 37 participants. In total there were 27 talks, delivered by well-established mathematicians and young researchers. In particular, 19 invited lectures were delivered by leading experts of the field, from 8 different countries. The wide variety of presentations composed a mosaic of aspects of approximation theory, highlighting interesting connections with important contemporary areas of Analysis. Primary topics discussed include application of approximation theory (isoperimetric inequalities, construction of...

Toxic phytoplankton in San Francisco Bay

Science.gov (United States)

Rodgers, Kristine M.; Garrison, David L.; Cloern, James E.

1996-01-01

The Regional Monitoring Program (RMP) was conceived and designed to document the changing distribution and effects of trace substances in San Francisco Bay, with focus on toxic contaminants that have become enriched by human inputs. However, coastal ecosystems like San Francisco Bay also have potential sources of naturally-produced toxic substances that can disrupt food webs and, under extreme circumstances, become threats to public health. The most prevalent source of natural toxins is from blooms of algal species that can synthesize metabolites that are toxic to invertebrates or vertebrates. Although San Francisco Bay is nutrient-rich, it has so far apparently been immune from the epidemic of harmful algal blooms in the world’s nutrient-enriched coastal waters. This absence of acute harmful blooms does not imply that San Francisco Bay has unique features that preclude toxic blooms. No sampling program has been implemented to document the occurrence of toxin-producing algae in San Francisco Bay, so it is difficult to judge the likelihood of such events in the future. This issue is directly relevant to the goals of RMP because harmful species of phytoplankton have the potential to disrupt ecosystem processes that support animal populations, cause severe illness or death in humans, and confound the outcomes of toxicity bioassays such as those included in the RMP. Our purpose here is to utilize existing data on the phytoplankton community of San Francisco Bay to provide a provisional statement about the occurrence, distribution, and potential threats of harmful algae in this Estuary.

Youth map of the city of Santo André, Southeastern Brazil: an instrument to read social inequalities.

Science.gov (United States)

Yonekura, Tatiana; Soares, Cássia Baldini; Minuci, Elaine Garcia; Campos, Célia Maria Sivalli; Trapé, Carla Andrea

2010-02-01

To analyze social inequalities in young adults living in an urban area by mapping sociodemographic and economic data. Using data from the 2000 Demographic Census, 57 sociodemographic and economic variables of young adults aged from 15 to 24 years, living in the city of Santo André, Southeastern Brazil, were distributed among 43 areas of statistical data, corresponding to a division of the region into smaller districts. Data from the year 2000 were collected from the Santo André City Hall Department of Socioeconomic Indicators. Using factorial analysis, 13 variables were grouped in two factors - working conditions and life conditions, which distinguished areas that were similar to one another statistically. Cluster analysis of areas was performed, resulting in four social groups. The area that concentrated young adults with higher access to wealth was classified as central and that including individuals with lower access to wealth was classified as peripheral. Two intermediate areas could be identified, one closer to the highest access to wealth ('almost central') and another close to the lowest access to wealth ('almost peripheral'). Discriminating variables were associated with work, migration, level of education, fertility, adolescent's position in the household, presence of spouse or partner, living conditions and assets owned. Differences among social groups revealed important inequalities among young adults who live, study and/or work in the city, which will contribute to the planning of public social policies aimed at these groups.

Hydrothermal zebra dolomite in the Great Basin, Nevada--attributes and relation to Paleozoic stratigraphy, tectonics, and ore deposits

Science.gov (United States)

Diehl, S.F.; Hofstra, A.H.; Koenig, A.E.; Emsbo, P.; Christiansen, W.; Johnson, Chad

2010-01-01

In other parts of the world, previous workers have shown that sparry dolomite in carbonate rocks may be produced by the generation and movement of hot basinal brines in response to arid paleoclimates and tectonism, and that some of these brines served as the transport medium for metals fixed in Mississippi Valley-type (MVT) and sedimentary exhalative (Sedex) deposits of Zn, Pb, Ag, Au, or barite. Numerous occurrences of hydrothermal zebra dolomite (HZD), comprised of alternating layers of dark replacement and light void-filling sparry or saddle dolomite, are present in Paleozoic platform and slope carbonate rocks on the eastern side of the Great Basin physiographic province. Locally, it is associated with mineral deposits of barite, Ag-Pb-Zn, and Au. In this paper the spatial distribution of HZD occurrences, their stratigraphic position, morphological characteristics, textures and zoning, and chemical and stable isotopic compositions were determined to improve understanding of their age, origin, and relation to dolostone, ore deposits, and the tectonic evolution of the Great Basin. In northern and central Nevada, HZD is coeval and cogenetic with Late Devonian and Early Mississippian Sedex Au, Zn, and barite deposits and may be related to Late Ordovician Sedex barite deposits. In southern Nevada and southwest California, it is cogenetic with small MVT Ag-Pb-Zn deposits in rocks as young as Early Mississippian. Over Paleozoic time, the Great Basin was at equatorial paleolatitudes with episodes of arid paleoclimates. Several occurrences of HZD are crosscut by Mesozoic or Cenozoic intrusions, and some host younger pluton-related polymetallic replacement and Carlin-type gold deposits. The distribution of HZD in space (carbonate platform, margin, and slope) and stratigraphy (Late Neoproterozoic Ediacaran-Mississippian) roughly parallels that of dolostone and both are prevalent in Devonian strata. Stratabound HZD is best developed in Ediacaran and Cambrian units, whereas

ASTER Flyby of San Francisco

Science.gov (United States)

2002-01-01

The Advanced Spaceborne Thermal Emission and Reflection radiometer, ASTER, is an international project: the instrument was supplied by Japan's Ministry of International Trade and Industry. A joint US/Japan science team developed algorithms for science data products, and is validating instrument performance. With its 14 spectral bands, extremely high spatial resolution, and 15 meter along-track stereo capability, ASTER is the zoom lens of the Terra satellite. The primary mission goals are to characterize the Earth's surface; and to monitor dynamic events and processes that influence habitability at human scales. ASTER's monitoring and mapping capabilities are illustrated by this series of images of the San Francisco area. The visible and near infrared image reveals suspended sediment in the bays, vegetation health, and details of the urban environment. Flying over San Francisco (3.2MB) (high-res (18.3MB)), we see the downtown, and shadows of the large buildings. Past the Golden Gate Bridge and Alcatraz Island, we cross San Pablo Bay and enter Suisun Bay. Turning south, we fly over the Berkeley and Oakland Hills. Large salt evaporation ponds come into view at the south end of San Francisco Bay. We turn northward, and approach San Francisco Airport. Rather than landing and ending our flight, we see this is as only the beginning of a 6 year mission to better understand the habitability of the world on which we live. For more information: ASTER images through Visible Earth ASTER Web Site Image courtesy of MITI, ERSDAC, JAROS, and the U.S./Japan ASTER Science Team

The Effect of Bangpungtongsung-san Extracts on Adipocyte Metabolism

Directory of Open Access Journals (Sweden)

Sang Min, Lee

2008-03-01

Full Text Available Objective : The purpose of this study is to investigate the effects of Bangpungtongsung-san extracts on the preadipocytes proliferation, of 3T3-L1 cell line. lipolysis of adipocytes in rat's epididymis and localized fat accumulation of porcine by extraction methods(alcohol and water. Methods : Diminish 3T3-L1 proliferation and lipogenesis do primary role to reduce obesity. So, 3T3-L1 preadipocyte and adipocytes were performed on cell cultures, and using Sprague-Dawley rats for the lipogenesis, and treated with 0.01-1 ㎎/㎖ Bangpungtongsung-san Extracts depend on concentrations. Porcine skin including fat tissue after treated Bangpungtongsung-san Extracts by means of the dosage dependent variation are investigated the histologic changes after injection of these extracts. Results : Following results were obtained from the 3T3-L1 preadipocyte proliferation and lipolysis of adipocyte in rats and histologic investigation of fat tissue. 1. Bangpungtongsung-san extracts were showed the effect of decreased preadipocyte proliferation on the high dosage(1.0㎎/㎖. 2. Bangpungtongsung-san extracts were showed the effect of decreased the activity of glycerol-3-phosphate dehydrogenase(GPDH on the high dosage(1.0㎎/㎖ and Specially, alcohol extract of Bangpungtongsung -san was clear as time goes by high concentration. 3. Bangpungtongsung-san extracts were showed tries to compare the effect of lipolysis, alcohol extract of Bangpungtongsung-san on the high dosage(1.0㎎/㎖ was observed the effect is higher than water extract. 4. Investigated the histological changes in porcine fat tissue after treated Bangpungtongsung-san extracts, we knew that water extract of Bangpungtongsung-san was showed the effect of lipolysis on the high dosage(10.0㎎/㎖ and alcohol extract of Bangpungtongsung-san was showed significant activity to the lysis of cell membranes in all concentration. Conclusion : These results suggest that Bangpungtongsung-san extracts efficiently

Aussteigen (getting out Impossible—Montage and Life Scenarios in Andres Veiel’s Film Black Box BRD

Directory of Open Access Journals (Sweden)

Anja Katharina Seiler

2016-02-01

Full Text Available Andres Veiel’s 2001 documentary film, Black Box BRD, links the biography of Alfred Herrhausen, RAF victim, with one of the 3rdgeneration RAF terrorists, Wolfgang Grams. In my paper, I trace how the film’s aesthetics introduce an image montage of two life scenarios by establishing both parallels and contrast, and therefore, following Susan Haywards definition “creates a third meaning” (112. I examine how the film establishes an aesthetic concept of Aussteigen (getting out—along of the alive, visible bodies—the contemporary interviewees, and dead, invisible bodies—of Herrhausen and Grams.

Changes in ground beetle assemblages above and below the treeline of the Dolomites after almost 30 years (1980/2009)

OpenAIRE

Pizzolotto, Roberto; Gobbi, Mauro; Brandmayr, Pietro

2014-01-01

Very little is known about the changes of ground beetle assemblages in the last few decades in the Alps, and different responses to climate change of animal populations living above and below the treeline have not been estimated yet. This study focuses on an altitudinal habitat sequence from subalpine spruce forest to alpine grassland in a low disturbance area of the southeastern Dolomites in Italy, the Paneveggio Regional Park. We compared the ground beetle (Carabidae) populations sampled in...

Mida teed siis, kui töötaja on avaldanud soovi firmast lahkuda? / Inge Rumessen, Andres Hall, Mariliin Saar ... [jt.

Index Scriptorium Estoniae

2016-01-01

Küsimusele vastavad PR Strategies partner ja strateegiline konsultant Inge Rumessen, auto24ring juhataja Andrs Hall, vabakutseline loovjuht ja produtsent Mariliin Saar, advokaadibüroo Tark partner Hannes Küün, ettevõtte Ööloom ja Frank kaasasutaja Jan Plaan, haridus- ja teadusministeeriumi personaliosakonna juhataja Margot Saluse, Sorry as Service müügijuht ja asutaja Indrek Põldvee ja EBS-i rahvusvahelise koostöö prorektor Toomas Danneberg

Siliciclastics in the Upper Triassic dolomite formations of the Krizna Unit (Maid Fatra Mountains, Western Carpathians): constraints for the Carnian Pluvial Event in the Fatric Basin

Czech Academy of Sciences Publication Activity Database

Sýkora, M.; Siblík, Miloš; Soták, J.

2011-01-01

Roč. 62, č. 2 (2011), s. 121-138 ISSN 1335-0552 Institutional research plan: CEZ:AV0Z30130516 Keywords : Carnian event * Upper Triassic dolomites * Western Carpathians * Krizna Unit * shaly interbeds * lingulids * conchostracans Subject RIV: DB - Geology ; Mineralogy Impact factor: 0.787, year: 2011

SANS studies of polymers

International Nuclear Information System (INIS)

Wignall, G.D.

1984-10-01

Before small-angle neutron scattering (SANS), chain conformation studies were limited to light and small angle x-ray scattering techniques, usually in dilute solution. SANS from blends of normal and labeled molecules could give direct information on chain conformation in bulk polymers. Water-soluble polymers may be examined in H 2 O/D 2 O mixtures using contrast variation methods to provide further information on polymer structure. This paper reviews some of the information provided by this technique using examples of experiments performed at the National Center for Small-Angle Scattering Research (NCSASR)

Modeling pesticide loadings from the San Joaquin watershed into the Sacramento-San Joaquin Delta using SWAT

Science.gov (United States)

Chen, H.; Zhang, M.

2016-12-01

The Sacramento-San Joaquin Delta is an ecologically rich, hydrologically complex area that serves as the hub of California's water supply. However, pesticides have been routinely detected in the Delta waterways, with concentrations exceeding the benchmark for the protection of aquatic life. Pesticide loadings into the Delta are partially attributed to the San Joaquin watershed, a highly productive agricultural watershed located upstream. Therefore, this study aims to simulate pesticide loadings to the Delta by applying the Soil and Water Assessment Tool (SWAT) model to the San Joaquin watershed, under the support of the USDA-ARS Delta Area-Wide Pest Management Program. Pesticide use patterns in the San Joaquin watershed were characterized by combining the California Pesticide Use Reporting (PUR) database and GIS analysis. Sensitivity/uncertainty analyses and multi-site calibration were performed in the simulation of stream flow, sediment, and pesticide loads along the San Joaquin River. Model performance was evaluated using a combination of graphic and quantitative measures. Preliminary results indicated that stream flow was satisfactorily simulated along the San Joaquin River and the major eastern tributaries, whereas stream flow was less accurately simulated in the western tributaries, which are ephemeral small streams that peak during winter storm events and are mainly fed by irrigation return flow during the growing season. The most sensitive parameters to stream flow were CN2, SOL_AWC, HRU_SLP, SLSUBBSN, SLSOIL, GWQMN and GW_REVAP. Regionalization of parameters is important as the sensitivity of parameters vary significantly spatially. In terms of evaluation metric, NSE tended to overrate model performance when compared to PBIAS. Anticipated results will include (1) pesticide use pattern analysis, (2) calibration and validation of stream flow, sediment, and pesticide loads, and (3) characterization of spatial patterns and temporal trends of pesticide yield.

Fault-related dolomitization in the Vajont Limestone (Southern Alps, Italy): photogrammetric 3D outcrop reconstruction, visualization with textured surfaces, and structural analysis

OpenAIRE

Bistacchi, Andrea; Balsamo, Fabrizio; Storti, Fabrizio; Mozafari, Mahtab; Swennen, Rudy; Solum, John; Taberner, Conxita

2013-01-01

The Vajont Gorge (Dolomiti Bellunesi, Italy) provides spectacular outcrops of Jurassic limestones (Vajont Limestone Formation) in which Mesozoic and Alpine faults and fracture corridors are continuously exposed. Some of these faults acted as conduits for fluids, resulting in structurally-controlled dolomitization of the Vajont Limestone, associated with significant porosity increase. We carried out a 3D surface characterization of the outcrops, combining high resolution topography and imaging...

XII Avatud Ühiskonna Foorumi arutlusring "Euroopa hiilgus ja viletsus - Euroopa Liit 50. Kuidas edasi?" / Toomas Hendrik Ilves, Mark Leonard, Ivan Krastev ; intervjueerinud Andres Kasekamp

Index Scriptorium Estoniae

Ilves, Toomas Hendrik, 1953-

2008-01-01

Pärnus diskuteerisid 10. oktoobril 2007 Euroopa tuleviku teemadel president Toomas Hendrik Ilves, Euroopa Välissuhete Nõukogu tegevjuht Mark Leonard ja Sofias paikneva Liberaalstrateegiate Keskuse juht Ivan Krastev. Vestluse moderaator oli Eesti Välispoliitika Instituudi direktor, Avatud Eesti Fondi nõukogu esimees Andres Kasekamp

Stability of an anaerobic single reactor filled with dolomitic limestone with increased organic load of sugarcane

Directory of Open Access Journals (Sweden)

Maria Magdalena Ribas Döll

2017-12-01

Full Text Available The anaerobic single-stage reactor was evaluated to treat vinasse and to evaluate its stability. This bench reactor was filled with dolomitic limestone with a horizontal plug flow to simulate a drainage channel. The experiment lasted 129 days while the reactor was submitted to different applied organic concentrations (chronologically applied: 3.0; 5.0; 12.0; 9.0 and 7.5 g L-1 as COD, chemical oxygen demand. COD removals were 50% and 9% with 3.0 and 7.5 g L-1, respectively. With 12.0 g L-1, reactor efficiency increased to 33%, with an abrupt drop to 3% on the 84th day. Therefore, in order to avoid reactor collapse, a remedial measure was necessary. The system remained in batch without feeding for 19 days (from the 85th to the 104th day with 9.0 g L-1. Afterwards, it was observed that the performance of the system tended to stabilize, reaching 47% with 7.5 g L-1 in the 118th day. At the end of the experiment, the potassium content of the wastewater decreased from 800 mg L-1 to 594 mg L-1 (on an average 25% and calcium and magnesium increased within the reactor liquor. The dissolution of the limestone inside the liquor reactor probably caused this result. After the treatment with limestone, the average pH value of the effluent increased from 4.9 to over 6.0 in all organic concentrations. It could be concluded that the reactor filled with dolomitic limestone in these operational conditions assured a low efficiency in COD removal, potassium reduction, increasing values of pH, alkalinity, calcium and magnesium. The instability was observed when there was increase in organic load to 12 g L-1 with subsequent recovery.

Interpretations of Tracer Tests Performed in the Culebra Dolomite at the Waste Isolation Pilot Plant Site

Energy Technology Data Exchange (ETDEWEB)

MEIGS,LUCY C.; BEAUHEIM,RICHARD L.; JONES,TOYA L.

2000-08-01

This report provides (1) an overview of all tracer testing conducted in the Culebra Dolomite Member of the Rustler Formation at the Waste Isolation Pilot Plant (WPP) site, (2) a detailed description of the important information about the 1995-96 tracer tests and the current interpretations of the data, and (3) a summary of the knowledge gained to date through tracer testing in the Culebra. Tracer tests have been used to identify transport processes occurring within the Culebra and quantify relevant parameters for use in performance assessment of the WIPP. The data, especially those from the tests performed in 1995-96, provide valuable insight into transport processes within the Culebra. Interpretations of the tracer tests in combination with geologic information, hydraulic-test information, and laboratory studies have resulted in a greatly improved conceptual model of transport processes within the Culebra. At locations where the transmissivity of the Culebra is low (< 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a single-porosity medium in which advection occurs largely through the primary porosity of the dolomite matrix. At locations where the transmissivity of the Culebra is high (> 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a heterogeneous, layered, fractured medium in which advection occurs largely through fractures and solutes diffuse between fractures and matrix at multiple rates. The variations in diffusion rate can be attributed to both variations in fracture spacing (or the spacing of advective pathways) and matrix heterogeneity. Flow and transport appear to be concentrated in the lower Culebra. At all locations, diffusion is the dominant transport process in the portions of the matrix that tracer does not access by flow.

Butterfly fauna in Mount Gariwang-san, Korea

Directory of Open Access Journals (Sweden)

Cheol Min Lee

2016-06-01

Full Text Available The aim of this study is to elucidate butterfly fauna in Mt. Gariwang-san, Korea. A field survey was conducted from 2010 to 2015 using the line transect method. A literature survey was also conducted. A total of 2,037 butterflies belonging to 105 species were recorded. In the estimation of species richness of butterfly, 116 species were estimated to live in Mt. Gariwang-san. In butterfly fauna in Mt. Gariwang-san, the percentage of northern species was very high and the percentage of grassland species was relatively higher than that of forest edge species and forest interior species. Sixteen red list species were found. In particular, Mimathyma nycteis was only recorded in Mt. Gariwang-san. When comparing the percentage of northern species and southern species including those recorded in previous studies, the percentage of northern species was found to have decreased significantly whereas that of southern species increased. We suggest that the butterfly community, which is distributed at relatively high altitudes on Mt. Gariwang-san, will gradually change in response to climate change.

Atención Odontológica Integral a Personas que Viven Con VIH-SIDA (Pvvih en el Hospital San Juan de Dios de Bogotá

Directory of Open Access Journals (Sweden)

John Harold Estrada Montoya

2011-01-01

Full Text Available Este artículo presenta el panorama del surgimiento del programa de atención odontológica a personas viviendo con VIH/SIDA (PVVS que fue implementado en el Hospital San Juan de Dios de Bogotá y que funcionó hasta el cierre definitivo del Hospital durante la presidencia de Andrés Pastrana Arango. Se presentan las diferentes etapas vividas en el programa y se destacan la implementación de los primeros protocolos de bioseguridad en el país que luego fueron tomados como modelo para todo el país bajo la supervisión del Ministerio de Salud. Luego se presentan las investigaciones en lesiones orales  asociadas al VIH y el significado clínico e inmunológico de estas lesiones para los pacientes y el equipo de salud. Finalmente se presentan los estudios relacionados con las lesiones más prevalentes (Candidosis oral y enfermedad periodontal y los factores relacionados con la adherencia a los tratamientos antirretrovirales, de gran importancia para pacientes y cuidadores, siendo estos los últimos estudios realizados antes del cierre definitivo del programa.

Distribution and demography of San Francisco gartersnakes (Thamnophis sirtalis tetrataenia) at Mindego Ranch, Russian Ridge Open Space Preserve, San Mateo County, California

Science.gov (United States)

Kim, Richard; Halstead, Brian J.; Wylie, Glenn D.; Casazza, Michael L.

2018-04-26

San Francisco gartersnakes (Thamnophis sirtalis tetrataenia) are a subspecies of common gartersnakes endemic to the San Francisco Peninsula of northern California. Because of habitat loss and collection for the pet trade, San Francisco gartersnakes were listed as endangered under the precursor to the Federal Endangered Species Act. A population of San Francisco gartersnakes resides at Mindego Ranch, San Mateo County, which is part of the Russian Ridge Open Space Preserve owned and managed by the Midpeninsula Regional Open Space District (MROSD). Because the site contained non-native fishes and American bullfrogs (Lithobates catesbeianus), MROSD implemented management to eliminate or reduce the abundance of these non-native species in 2014. We monitored the population using capture-mark-recapture techniques to document changes in the population during and following management actions. Although drought confounded some aspects of inference about the effects of management, prey and San Francisco gartersnake populations generally increased following draining of Aquatic Feature 3. Continued management of the site to keep invasive aquatic predators from recolonizing or increasing in abundance, as well as vegetation management that promotes heterogeneous grassland/shrubland near wetlands, likely would benefit this population of San Francisco gartersnakes.

Tracing high-pressure metamorphism in marbles: Phase relations in high-grade aluminous calcite-dolomite marbles from the Greek Rhodope massif in the system CaO-MgO-Al 2O 3-SiO 2-CO 2 and indications of prior aragonite

Science.gov (United States)

Proyer, A.; Mposkos, E.; Baziotis, I.; Hoinkes, G.

2008-08-01

Four different types of parageneses of the minerals calcite, dolomite, diopside, forsterite, spinel, amphibole (pargasite), (Ti-)clinohumite and phlogopite were observed in calcite-dolomite marbles collected in the Kimi-Complex of the Rhodope Metamorphic Province (RMP). The presence of former aragonite can be inferred from carbonate inclusions, which, in combination with an analysis of phase relations in the simplified system CaO-MgO-Al 2O 3-SiO 2-CO 2 (CMAS-CO 2) show that the mineral assemblages preserved in these marbles most likely equilibrated at the aragonite-calcite transition, slightly below the coesite stability field, at ca. 720 °C, 25 kbar and aCO 2 ~ 0.01. The thermodynamic model predicts that no matter what activity of CO 2, garnet has to be present in aluminous calcite-dolomite-marble at UHP conditions.

Edouard Andre (1840-1911, Jardinero-Naturalista y sus viajes por Colombia y el Ecuador

Directory of Open Access Journals (Sweden)

Chardon Carlos E.

1947-06-01

Full Text Available En la literatura botánica de Colombia y el Ecuador figura ocasionalmente con tono de notable indiferencia el nombre de EDOUARD ANDRÉ, célebre jardinero-naturalista francés, que visitó estos dos países allá por los años de 1875-1876. Por esta razón, los datos biográficos que se incluyen a continuación pueden ser de interés. Los debo principalmente a la exquisita gentileza de MADAME DUPRAT, bibliotecaria del Museo Nacional de Historia Natural, de París, quien recientemente me ha suministrado copia de los datos biográficos de ANDRE, publicados en la Revue horticote (numero del 1o de noviembre de 1911, agotado.

San Francisco Bay Long Term Management Strategy for Dredging

Science.gov (United States)

The San Francisco Bay Long Term Management Strategy (LTMS) is a cooperative effort to develop a new approach to dredging and dredged material disposal in the San Francisco Bay area. The LTMS serves as the Regional Dredging Team for the San Francisco area.

Laboratorios Andrómaco: Origins of the First Subsidiary of a Spanish Pharmaceutical Multinational in the United States (1928–1946

Directory of Open Access Journals (Sweden)

Paloma Fernández Pérez

2016-07-01

Full Text Available Laboratorios Andrómaco was a Spanish pharmaceutical company that opened a commercial subsidiary in the United States in the early months of 1929. It was located right in the heart of Manhattan, at 11 West 47th Street, in front of the New York Public Library. Despite the Wall Street crash, it remained open until 1946. The owner was the pharmacist-entrepreneur Fernando Rubió Tudurí (1900–1994. It was the first foreign direct investment made by a Spanish pharmaceutical multinational in the United States, using a maquila-style operation to export Spanish products made in the USA to Central American markets. Nothing has been published about this until now. Only interviews with Enrique and Mercè Rubió Boada (son and daughter of Fernando Rubió, digitalized sources from the company held by the Fundació Rubió Tudurí in Mahón, Minorca, and hard-to-access secondary sources have made the recovery of this history possible. The company closed its doors in the US and expanded in South American markets after World War II, but the short history of their investment in the United States reveals the potential and international capabilities of Spanish pharmaceutical companies before the Spanish Civil War. Moreover, it reveals how the Spanish Civil War was a disaster for millions of people but in some special cases it became an opportunity for companies in the science industries. Few pharmaceutical firms like Andrómaco, with entrepreneurs, resources, and a long-term vision, took the decision to invest in the most profitable (though also the most difficult market for pharmaceutical products in the world: the United States. Andrómaco was created in Barcelona in 1923 by two scientist-entrepreneurs (Raul Roviralta and Fernando Rubió Tudurí. A nutritional product called Glefina (made with Norwegian cod oil from Ålesund and sugar brought the small firm considerable success in sales in Spain in the mid-1920s. Making use of impressive networks (with the

San Juan Uchucuanicu: évolution historique

Directory of Open Access Journals (Sweden)

1975-01-01

Full Text Available La communauté de San Juan est reconnue depuis 1939. Une première partie concerne l’organisation de la reducción de San Juan vers le milieu du XVIe siècle. Le poids fiscal s’exerce durement sur le village et la crise est générale dans toute la vallée du Chancay au XVIIe. siècle. La christianisation des habitants est définitive au milieu de ce même siècle. C’est vers la fin du XVIIe siècle et durant tout le XVIIIe que se multiplient les conflits entre San Juan et les villages voisins liés aux terrains de pâture et à la possession de l’eau. La deuxième partie du travail concerne les rapports de la communauté de San Juan avec le Pérou contemporain : contrainte fiscale toujours très lourde durant la fin de l’époque coloniale, exactions des militaires juste avant l’indépendance. La période républicaine voit toujours les conflits avec les villages voisins mais aussi la naissance de familles qui cherchent à retirer le maximum de la communauté. Les terres sont divisées et attribuées : la détérioration de l’organisation communale traditionnelle est manifeste. L4es conflits se multiplient entre petits propriétaires, mais aussi avec les haciendas voisines : c’est l’apparition d’une véritable lutte de classes. La situation actuelle est incertaine, le poids de l’économie marchande se développe avec l’exode des jeunes. Que sera la communauté San Juan à la fin de ce siècle? La comunidad de San Juan está reconocida desde 1939. La primera parte concierne a la organización de la 'reducción' de San Juan hacia mediados del siglo XVI. El peso fiscal se ejerce duramente sobre el pueblo y en el siglo XVII la crisis es general en todo el valle de Chancay. Hacia mediados del mismo siglo la cristianización de los habitantes es definitiva. Es hacia fines del siglo XVII y durante todo el siglo XVIII que se multiplican los conflictos entre San Juan y los pueblos vecinos, los que están relacionados con los terrenos de

Quaternary geology of Alameda County, and parts of Contra Costa, Santa Clara, San Mateo, San Francisco, Stanislaus, and San Joaquin counties, California: a digital database

Science.gov (United States)

Helley, E.J.; Graymer, R.W.

1997-01-01

Alameda County is located at the northern end of the Diablo Range of Central California. It is bounded on the north by the south flank of Mount Diablo, one of the highest peaks in the Bay Area, reaching an elevation of 1173 meters (3,849 ft). San Francisco Bay forms the western boundary, the San Joaquin Valley borders it on the east and an arbitrary line from the Bay into the Diablo Range forms the southern boundary. Alameda is one of the nine Bay Area counties tributary to San Francisco Bay. Most of the country is mountainous with steep rugged topography. Alameda County is covered by twenty-eight 7.5' topographic Quadrangles which are shown on the index map. The Quaternary deposits in Alameda County comprise three distinct depositional environments. One, forming a transgressive sequence of alluvial fan and fan-delta facies, is mapped in the western one-third of the county. The second, forming only alluvial fan facies, is mapped in the Livermore Valley and San Joaquin Valley in the eastern part of the county. The third, forming a combination of Eolian dune and estuarine facies, is restricted to the Alameda Island area in the northwestern corner of the county.

San Francisco Bay Water Quality Improvement Fund

Science.gov (United States)

EPAs grant program to protect and restore San Francisco Bay. The San Francisco Bay Water Quality Improvement Fund (SFBWQIF) has invested in 58 projects along with 70 partners contributing to restore wetlands, water quality, and reduce polluted runoff.,

André Pichot, Aux origines des théories raciales. De la Bible à Darwin

Directory of Open Access Journals (Sweden)

Anthony Feneuil

2010-07-01

Full Text Available « Le darwinisme n’est pas une théorie scientifique qui a connu maintes dérives idéologiques, c’est une idéologie à qui la génétique a fini par donner un aspect à peu près scientifique » (p. 299. Telle est la thèse qui conduit André Pichot, dans son dernier livre, à opérer un bouleversement des catégories habituelles de pensée : Darwin n’est plus le champion de la vision scientifique du monde en lutte contre la conception obscurantiste du créationnisme et du finalisme religieux, mais l’une de...

Effect of a 12-day balneotherapy programme on pain, mood, sleep, and depression in healthy elderly people.

Science.gov (United States)

Latorre-Román, Pedro Ángel; Rentero-Blanco, Manuel; Laredo-Aguilera, Jose Alberto; García-Pinillos, Felipe

2015-03-01

The main purpose of this study is to analyze the effect of a 12-day balneotherapy programme on pain, mood state, sleep, and depression in older adults. In this study, 52 elderly adults from different areas of Spain participated in a social hydrotherapy programme created by the government's Institute for Elderly and Social Services, known as IMSERSO; participants included 23 men (age, 69.74 ± 5.19 years) and 29 women (age, 70.31 ± 6.76 years). Pain was analyzed using the visual analogue scale. Mood was assessed using the Profile of Mood Status. Sleep was assessed using the Oviedo Sleep Questionnaire. Depression was assessed using the Geriatric Depression Scale. The balneotherapy programme was undertaken at Balneario San Andrés (Jaén, Spain). The water at Balneario San Andrés, according to the Handbook of Spanish Mineral Water, is a hypothermic (≥20°C) hard water of medium mineralization, with bicarbonate, sulfate, sodium, and magnesium as the dominant ions. Balneotherapy produced significant improvements (P balneotherapy programme has a positive effect on pain, mood, sleep quality, and depression in healthy older people. © 2014 The Authors. Psychogeriatrics © 2014 Japanese Psychogeriatric Society.

Development of 40m SANS and Its Utilization Techniques

International Nuclear Information System (INIS)

Choi, Sung Min; Kim, Tae Hwan

2010-06-01

Small angle neutron scattering (SANS) has been a very powerful tool to study nanoscale (1-100 nm) bulk structures in various materials such as polymer, self assembled materials, nano-porous materials, nano-magnetic materials, metal and ceramics. Understanding the importance of the SANS instrument, the 8m SANS instrument was installed at the CN beam port of HANARO in 2001. However, without having a cold neutron source, the beam intensity is fairly low and the Q-range is rather limited due to short instrument length. In July 1, 2003, therefore, the HANARO cold neutron research facility project was launched and a state of the art 40m SANS instrument was selected as top-priority instrument. The development of the 40m SANS instrument was completed as a joint project between Korea Advanced Institute of Science and Technology and the HANARO in 2010. Here, we report the specification of a state of art 40m SANS instrument at HANARO

San Diego's High School Dropout Crisis

Science.gov (United States)

Wilson, James C.

2012-01-01

This article highlights San Diego's dropout problem and how much it's costing the city and the state. Most San Diegans do not realize the enormous impact high school dropouts on their city. The California Dropout Research Project, located at the University of California at Santa Barbara, has estimated the lifetime cost of one class or cohort of…

Neurological Impact of World War I on the Artistic Avant-Garde: The Examples of André Breton, Guillaume Apollinaire and Blaise Cendrars.

Science.gov (United States)

Bogousslavsky, Julien; Tatu, Laurent

2016-01-01

World War I erupted at a time when artistic avant-gardes were particularly thriving across Europe. Young poets, writers, painters and sculptors were called to arms or voluntary enrolled to fight, and several of them died during the conflict. Among others, it dramatically changed their creative output, either through specific wounds or through personal encounters and experiences. These individual events then significantly modified the course of the literary and artistic avant-garde movements. Three particularly illustrative examples of avant-garde French poets are presented here: André Breton (1896-1966), Guillaume Apollinaire (1880-1918) and Blaise Cendrars (1887-1961). The deep source of the surrealist movement can indeed be found in André Breton's involvement as an auxiliary physician with critical interest in neuropsychiatry, which caused him to discover automatic writing. Guillaume Apollinaire's right temporal subdural hematoma strongly modified his emotional state and subsequent artistic activities. Alternatively, after losing his right, writing hand, Blaise Cendrars not only substituted it with a phantom but also rapidly switched from poetry to novels after he learnt to write with his left hand. © 2016 S. Karger AG, Basel.

Coal exploration in the Alto San Jorge area, Cordoba Department. Exploracion de carbones en el Ato San Jorge, Departamento de Cordoba

Energy Technology Data Exchange (ETDEWEB)

Ospina, L H; Oquendo, G G [Geominas Ltda, Medellin (Colombia)

1989-01-01

A Mining Feasibility Study in the Area of Alto San Jorge, Department of Cordoba, Colombia, was commissioned by CARBOCOL S.A. to the Consortium Geominas-NACI. An area of 800 Ka2 was explored to define surface mining possibilities within two subareas referred to as Alto San Jorge and San Pedro Ure. Rocks of Cretaceous, Tertiary and Quaternary age crop out in the zone. In the subarea Alto San Jorge the principal structure is a syncline with a south-north direction. The San Pedro Ure subarea is formed by undulations with flanks of low dip, the most important being the San Antonio Syncline because it contains the mining block. The geological study of the surface demonstrated the existence of coal in the Oligocene Cienaga de Oro Formation and the Niocene Cerrito Formation, with potential resources of 6.3 billion tons. The subsequent exploration of the subsoil, with 20.618 m of drilling, permitted determination of demonstrated reserves in the order of 2.9 billion tons within two areas. In the sector selected for the mine plan, in the area of San Pedro-Puerto Libertador, 7.791 m of drilling was accomplished to define a demonstrated reserve of 515 million tons of coal down to a depth of 200. The combustible type coal has 5.000 cal/g. Complete mining schedules were developed at the prefeasibility level for two surface mines with productions of 1.5 MMTY and 4 MMTY. 9 figs., 3 tabs., 28 refs.

Impact of shallowly deposited ore-bearing dolomites on local soil pollution aureoles of As, Cd, Pb, and Zn in an old mining area

Energy Technology Data Exchange (ETDEWEB)

Fabijanczyk, Piotr; Zawadzki, Jaroslaw [Warsaw Univ. of Technology (Poland). Environmental Engineering Faculty

2012-10-15

The study area, located in Upper Silesian Industrial Region, was rich in significant amounts of ores that were classified of Mississippi Valley type. Being these ores especially rich in Pb and Zn, an intense development of mining and ore extraction industry was verified in this area. The goal of this study was to investigate how local pollution aureoles of As, Cd, Pb, and Zn were influenced by the presence of shallowly deposited ore-bearing dolomites. Very extensive sampling campaign was carried out, and over 1,000 samples were collected in the area of about 150 km{sup 2}. Local aureoles of investigated metals were calculated for two soil layers. The first one covered the part of soil core from the soil surface to the depth of 20 cm and the second one from the depth of 40 cm to the depth of 60 cm. All spatial distributions of particular metals in soil were calculated by means of ordinary kriging using free softwares QGIS and SAGA. Maximum concentrations of Pb and Zn in soil in study area were very high, reaching over 24,000 and 77,000 mg/kg, respectively. Maximum concentrations of As and Cd were also very high, reaching about 1,000 mg/kg. Those maximum values were observed in the direct vicinity of the Boles?aw mine and its mine dumps. Almost all local aureoles were located within the range of ore-bearing dolomites. It was especially visible for Pb and Zn, minerals very common in ore deposits. Otherwise, local aureoles of As and Cd were more related with the vicinity of mines and other pollution sources, being more associated to the anthropogenic pollution than to the presence of ore-bearing dolomites. The aureoles of Pb and Zn, and in moderate degree of As, were associated with a mineral composition of ores. Differently, the location, the shape, and spatial pattern of Cd aureoles suggest that they were mostly influenced by anthropogenic pollution. Anthropogenic factors were dominating over the lithogenic ones and masking the influence of the shallowly deposited

Differences in the rheological properties of calcitic and dolomitic lime slurries: influence of particle characteristics and practical implications in lime-based mortar manufacturing

Directory of Open Access Journals (Sweden)

Arizzi, A.

2012-06-01

Full Text Available The study of the rheological properties of lime suspensions is a useful means to evaluate the workability of lime mortars. In this work, we studied the flow behaviour of two industrial hydrated limes, one of calcitic and the other of dolomitic composition, by means of two types of rheometer with different geometry and setup mode. The obtained results were interpreted taking into account the differences in microstructure and surface properties of the suspended particles. Calcitic lime dry particles are formed by angular and polydisperse clusters and, once dispersed in water, they behave like thixotropic materials. On the other hand, the dolomitic lime is formed by nanoparticles and small round cluster and it shows a pronounced plastic behaviour in suspension. This fundamental difference between the two materials explains the traditional preference for dolomitic lime mortars for plastering and rendering applications.

El estudio de las propiedades reológicas de suspensiones de cal es una herramienta muy útil para evaluar la trabajabilidad de morteros de cal. En este trabajo se ha estudiado el comportamiento en suspensión de dos cales hidratadas, de composición calcítica y dolomítica, mediante dos tipos de reómetros con geometría y modalidades distintas de medida. Los resultados obtenidos se han interpretado teniendo en cuenta las diferencias en la microestructura y las propiedades de superficie de las partículas en suspensión. Las partículas de cal calcítica están formadas por aglomerados angulares y polidispersos y, una vez dispersadas en agua, presentan un comportamiento tixotrópico. Por su parte, la cal dolomítica está formada por nanopartículas y pequeños agregados redondeados y muestra en suspensión un pronunciado comportamiento plástico. Esta importante diferencia entre las dos cales explica la preferencia tradicional de morteros de cal dolomítica para aplicaciones en revocos.

Cenobios leoneses altomedievales ante la europeización: San Pedro y San Pablo de Montes, Santiago y San Martín de Peñalba y San Miguel de Escalada

Directory of Open Access Journals (Sweden)

Martínez Tejera, Artemio Manuel

2002-06-01

Full Text Available The following paper analyses the behaviour of three of the most important monastic communities in the reing of Asturias-Leon for the ninth and then centuries. During this period we witness the implementation of a new ordo, or liturgical ritual that replaces the Hispanic one, strongly established in the Territorium. The liturgical adaptation produces tension and conflicts among the members of different monastic communities, and even between the Episcopate and the monarchy - being King Alfonso VI. In some of the monasteries, the arrival of the new ordo causes the adaptation of the liturgical space, with subsequent changes in liturgical furniture.

El presente estudio pretende analizar el comportamiento de tres de las más importantes comunidades monásticas astur-leonesas de los siglos IX y X (San Pedro y San Pablo de Montes, Santiago y San Martín de Peñalba y San Miguel de Escalada ante la recepción e implantación de aquel nuevo ordo o ritual litúrgico que vino a sustituir al Hispánico, fuertemente asentado en el territorium. Readaptación litúrgica que, con distinta intensidad, producirá tensiones y enfrentamientos entre los miembros de las distintas comunidades monásticas, incluso entre el episcopado y la monarquía (personificada en la figura de Alfonso VI, pero no únicamente. En alguno de estos monasterios la llegada del nuevo ordo supondrá, además, la readaptación de su espacio litúrgico, lo que trajo consigo significativas modificaciones constructivas.

Radionuclide and colloid transport in the Culebra Dolomite and associated complementary cumulative distribution functions in the 1996 performance assessment for the Waste Isolation Pilot Plant

Energy Technology Data Exchange (ETDEWEB)

RAMSEY, JAMES L.; BLAINE,R.; GARNER,J.W.; HELTON,JON CRAIG; JOHNSON,J.D.; SMITH,L.N.; WALLACE,M.

2000-05-22

The following topics related to radionuclide and colloid transport in the Culebra Dolomite in the 1996 performance assessment for the Waste Isolation Pilot Plant (WIPP) are presented: (1) mathematical description of models, (2) uncertainty and sensitivity analysis results arising from subjective (i.e., epistemic) uncertainty for individual releases, and (3) construction of complementary cumulative distribution functions (CCDFs) arising from stochastic (i.e., aleatory) uncertainty. The presented results indicate that radionuclide and colloid transport in the Culebra Dolomite does not constitute a serious threat to the effectiveness of the WIPP as a disposal facility for transuranic waste. Even when the effects of uncertain analysis inputs are taken into account, no radionuclide transport to the boundary with the accessible environment was observed; thus the associated CCDFs for comparison with the boundary line specified in the US Environmental Protection Agency's standard for the geologic disposal of radioactive waste (40 CFR 191, 40 CFR 194) are degenerate in the sense of having a probability of zero of exceeding a release of zero.

Effective porosity and density of carbonate rocks (Maynardville Limestone and Copper Ridge Dolomite) within Bear Creek Valley on the Oak Ridge Reservation based on modern petrophysical techniques

International Nuclear Information System (INIS)

Dorsch, J.

1997-02-01

The purpose of this study is to provide quantitative data on effective porosity of carbonate rock from the Maynardville Limestone and Copper Ridge Dolomite within Bear Creek Valley based on modern petrophysical techniques. The data will be useful for groundwater-flow and contaminant-flow modeling in the vicinity of the Y-12 Plant on the Oak Ridge Reservation (ORR). Furthermore, the data provides needed information on the amount of interconnected pore space potentially available for operation of matrix diffusion as a transport process within the fractured carbonate rock. A second aspect of this study is to compare effective porosity data based on modern petrophysical techniques to effective porosity data determined earlier by Goldstrand et al. (1995) with a different technique. An added bonus of the study is quantitative data on the bulk density and grain density of dolostone and limestone of the Maynardville Limestone and Copper Ridge Dolomite which might find use for geophysical modeling on the ORR

Bioseguridad y armas biológicas:\tLa amenaza de Andrómeda (1971

Directory of Open Access Journals (Sweden)

Manuel SÁNCHEZ

2016-11-01

Full Text Available La amenaza de Andrómeda es la adaptación cinematográfica de la obra homónima escrita por Michael Crichton. Puede considerarse como la película más “microbiológica” del Séptimo Arte. Dirigida por Robert Wise, este tecno-thriller describe los esfuerzos de un equipo de científicos para caracterizar y contener a un microorganismo patógeno extraterrestre. A pesar de haber sido realizada hace 40 años, se tratan temas de plena actualidad como es el de las armas biológicas, las medidas de aislamiento y protección, la automatización en los procedimientos sanitarios y la toma de decisiones ante una situación grave e inesperada.

77 FR 46115 - Notice of Inventory Completion: San Diego Museum of Man, San Diego, CA

Science.gov (United States)

2012-08-02

...The San Diego Museum of Man has completed an inventory of human remains in consultation with the appropriate Indian tribe, and has determined that there is a cultural affiliation between the human remains and a present-day Indian tribe. Representatives of any Indian tribe that believes itself to be culturally affiliated with the human remains may contact the San Diego Museum of Man. Repatriation of the human remains to the Indian tribe stated below may occur if no additional claimants come forward.

Effects of Choto-san and Chotoko on thiopental-induced sleeping time

OpenAIRE

JEENAPONGSA, Rattima; Tohda, Michihisa; Watanabe, Hiroshi

2003-01-01

Choto-san has been used for treatment of centrally regulated disorders such as dementia, hypertension, headache and vertigo. Our laboratory showed that Choto-san improved learning memory in ischemic mice. It is noticeable that Choto-san treated animals and animals that underwent conducting occlusion of common carotid arteries (2VO) operation slept longer than the normal animals. Therefore, this study aimed to clarify the effects of Choto-san and its related component; Chotoko and Choto-san wi...

33 CFR 110.120 - San Luis Obispo Bay, Calif.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false San Luis Obispo Bay, Calif. 110... ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.120 San Luis Obispo Bay, Calif. (a) Area A-1. Area A-1 is the water area bounded by the San Luis Obispo County wharf, the shoreline, a line drawn...

Species Observations (poly) - San Diego County [ds648

Data.gov (United States)

California Natural Resource Agency — Created in 2009, the SanBIOS database serves as a single repository of species observations collected by various departments within the County of San Diego's Land...

Mammal Track Counts - San Diego County [ds442

Data.gov (United States)

California Natural Resource Agency — The San Diego Tracking Team (SDTT) is a non-profit organization dedicated to promoting the preservation of wildlife habitat in San Diego County through citizen-based...

Species Observations (poly) - San Diego County [ds648

Data.gov (United States)

California Department of Resources — Created in 2009, the SanBIOS database serves as a single repository of species observations collected by various departments within the County of San Diego's Land...

Biological and associated water-quality data for lower Olmos Creek and upper San Antonio River, San Antonio, Texas, March-October 1990

Science.gov (United States)

Taylor, R. Lynn

1995-01-01

Biological and associated water-quality data were collected from lower Olmos Creek and upper San Antonio River in San Antonio, Texas, during March-October 1990, the second year of a multiyear data-collection program. The data will be used to document water-quality conditions prior to implementation of a proposal to reuse treated wastewater to irrigate city properties in Olmos Basin and Brackenridge Parks and to augment flows in the Olmos Creek/San Antonio River system.

Remembering San Diego

International Nuclear Information System (INIS)

Chuyanov, V.

1999-01-01

After 6 years of existence the ITER EDA project in San Diego, USA, was terminated by desition of the US Congress. This article describes how nice it was for everybody as long as it lasted and how sad it is now

Effect of H{sub 2}S on the catalytic decomposition of tar and ammonia with dolomite and sintered iron ore in synthetic gasification gas

Energy Technology Data Exchange (ETDEWEB)

Hepola, J [VTT Energy, Espoo (Finland)

1997-12-31

The toluene-decomposing activity of calcined dolomite was not affected by the H{sub 2}S content of synthetic gasification gas. Iron was active with respect to toluene and ammonia at metallic state. The increase of the H{sub 2}S content of synthetic gasification gas (0 - 500 ppmv) decreased the tar-decomposing activity but not the ammonia- decomposing activity of sintered iron ore. (author) (12 refs.)

Effect of H{sub 2}S on the catalytic decomposition of tar and ammonia with dolomite and sintered iron ore in synthetic gasification gas

Energy Technology Data Exchange (ETDEWEB)

Hepola, J. [VTT Energy, Espoo (Finland)

1996-12-31

The toluene-decomposing activity of calcined dolomite was not affected by the H{sub 2}S content of synthetic gasification gas. Iron was active with respect to toluene and ammonia at metallic state. The increase of the H{sub 2}S content of synthetic gasification gas (0 - 500 ppmv) decreased the tar-decomposing activity but not the ammonia- decomposing activity of sintered iron ore. (author) (12 refs.)

Update: San Andreas Fault experiment

Science.gov (United States)

Christodoulidis, D. C.; Smith, D. E.

1984-01-01

Satellite laser ranging techniques are used to monitor the broad motion of the tectonic plates comprising the San Andreas Fault System. The San Andreas Fault Experiment, (SAFE), has progressed through the upgrades made to laser system hardware and an improvement in the modeling capabilities of the spaceborne laser targets. Of special note is the launch of the Laser Geodynamic Satellite, LAGEOS spacecraft, NASA's only completely dedicated laser satellite in 1976. The results of plate motion projected into this 896 km measured line over the past eleven years are summarized and intercompared.

Vabariigi aastapäev San Franciscos / Heino Valvur ; foto: Heino Valvur

Index Scriptorium Estoniae

Valvur, Heino

2006-01-01

veebruarikuu möödus San Franciscos Eesti Vabariigi 88. aastapäeva pühitsedes: traditsiooniliselt tähistas aastapäeva San Francisco Seenioride Klubi koosviibimisega, E.E.L.K. San Francisco koguduses peeti jumalateenistus ja koosviibimine, kus noored esitasid rahvalaule, San Francisco Eesti Selts tähistas aastapäeva 25. veebruaril aktuse ja koosviibimisega

76 FR 70480 - Otay River Estuary Restoration Project, South San Diego Bay Unit of the San Diego Bay National...

Science.gov (United States)

2011-11-14

... River Estuary Restoration Project, South San Diego Bay Unit of the San Diego Bay National Wildlife...), intend to prepare an environmental impact statement (EIS) for the proposed Otay River Estuary Restoration... any one of the following methods. Email: [email protected] . Please include ``Otay Estuary NOI'' in the...

Analysis of holding time variations to Ni and Fe content and morphology in nickel laterite limonitic reduction process by using coal-dolomite bed

Science.gov (United States)

Abdul, Fakhreza; Pintowantoro, Sungging; Yuwandono, Ridwan Bagus

2018-04-01

With the depletion of nickel sulfide ore resources, the nickel laterit processing become an attention to fulfill nickel world demans. Reducing laterite nickel by using a low cost carbonaceous reductan has proved produces high grade ferronickel alloy. In this research, reduction was carried out to low grade laterite nickel (limonite) with 1.25% nikel content by using CO gas reductant formed by reaction between coal and dolomite. Reduction process preceded by forming brickets mixture from limonit ore, coal, and Na2SO4, then the brickets placed inside crucible bed together with dolomit and reduced at temperature 1400 °C with holding time variations 4, 6, and 8 hours. EDX, XRD, and SEM test were carried out to find out the Ni and nickel grade after reduced, the phases that formed, and the morphology brickets after reduced. The reduction results shows that the highest increase on nickel grade was obtained by 8 hours holding time increasing 5.84 % from initial grade, and the highest recovery was obtained by 6 hours holding time with recovery 88.51 %. While the higest increase on Fe grade was obtained by 4 hours holding time, and the highest recovery Fe was obtained by 4 hours holding time with recovery 85.41%.

Thermal comfort in twentieth-century architectural heritage: Two houses of Le Corbusier and André Wogenscky

Directory of Open Access Journals (Sweden)

Ignacio Requena-Ruiz

2016-06-01

This article aims to develop a balanced understanding of the approach of Modernist architecture to climate, indoor atmospheres and inhabitants׳ thermal comfort. To do so, we complement the quantitative approach of environmental assessment methods with the qualitative angle of the history of sensory and architecture. The goal is to understand the environmental performance of architecture for dealing nowadays with thermal comfort issues while respecting its cultural and historical values. Two modernist houses have been selected as case studies: the Villa Curutchet of the master Le Corbusier and the Villa Chupin of his disciple André Wogenscky. As a result, the article reveals potentialities and constraints in terms of thermal comfort when working with Modern Architecture.

Backwater Flooding in San Marcos, TX from the Blanco River

Science.gov (United States)

Earl, Richard; Gaenzle, Kyle G.; Hollier, Andi B.

2016-01-01

Large sections of San Marcos, TX were flooded in Oct. 1998, May 2015, and Oct. 2015. Much of the flooding in Oct. 1998 and Oct. 2015 was produced by overbank flooding of San Marcos River and its tributaries by spills from upstream dams. The May 2015 flooding was almost entirely produced by backwater flooding from the Blanco River whose confluence is approximately 2.2 miles southeast of downtown. We use the stage height of the Blanco River to generate maps of the areas of San Marcos that are lower than the flood peaks and compare those results with data for the observed extent of flooding in San Marcos. Our preliminary results suggest that the flooding occurred at locations more than 20 feet lower than the maximum stage height of the Blanco River at San Marcos gage (08171350). This suggest that the datum for either gage 08171350 or 08170500 (San Marcos River at San Marcos) or both are incorrect. There are plans for the U.S. Army Corps of Engineers to construct a Blanco River bypass that will divert Blanco River floodwaters approximately 2 miles farther downstream, but the $60 million price makes its implementation problematic.

DOLOMITE DESULFURIZATION BEHAVIOR IN A BUBBLING FLUIDIZED BED PILOT PLANT FOR HIGH ASH COAL

Directory of Open Access Journals (Sweden)

G. M. F. Gomes

Full Text Available Abstract Although fluidized bed in situ desulphurization from coal combustion has been widely studied, there are aspects that remain under investigation. Additionally, few publications address Brazilian coal desulphurization via fluidized beds. This study used a 250 kWth bubbling fluidized bed pilot plant to analyze different aspects of the dolomite desulphurization of two Brazilian coals. Superficial velocities of 0.38 and 0.46 m/s, flue gas recycling, Ca/S molar ratios and elutriation were assessed. Results confirmed the influence of the Ca/S molar ratio and superficial velocity - SO2 conversion up to 60.5% was achieved for one coal type, and 70.9% was achieved for the other type. A recycling ratio of 54.6% could increase SO2 conversion up to 86.1%. Elutriation and collection of ashes and Ca-containing products did not present the same behavior because a lower wt. % of CaO was collected by the gas controlled mechanism compared to the ash.

33 CFR 165.1187 - Security Zones; Golden Gate Bridge and the San Francisco-Oakland Bay Bridge, San Francisco Bay...

Science.gov (United States)

2010-07-01

... Limited Access Areas Eleventh Coast Guard District § 165.1187 Security Zones; Golden Gate Bridge and the... Golden Gate Bridge and the San Francisco-Oakland Bay Bridge, in San Francisco Bay, California. (b... siren, radio, flashing light, or other means, the operator of a vessel shall proceed as directed. [COTP...

Chemical and radiochemical characteristics of groundwater in the Culebra Dolomite, southeastern New Mexico

International Nuclear Information System (INIS)

Chapmen, J.B.

1988-03-01

The nation's first geologic repository for radioactive waste is being excavated in southeastern New Mexico at the Waste Isolation Pilot Plant (WIPP). Post-closure radioactive release scenarios from WIPP often involve hydrologic transport of radionuclides through the overlying Rustler Formation, in the Culebra Dolomite Member. The Environmental Evaluation Group (EEG) has conducted an investigation of the chemistry of culebra groundwater. Analysis revealed the following: salinities in Culebra groundwater generally increase from west to east; a Na-Cl type water dominates over most of the sampled area with a Ca-SO 4 type occurring in the southern to southwestern area; exclusive of the low-salinity southern area, most wells located on the same general flow path have similar ion ratios; dissolved uranium content in Culebra groundwater is relatively high, with marked disequilibrium between U-238 and U-234 activities; Ra-226 and Ra-228 are sometimes present in relatively large amounts; Th-228 was detected in samples from 5 wells; and Cs-137 was detected in several samples. 39 refs., 21 figs., 2 tabs

André Freire, Esquerda e Direita na Política Europeia : Portugal, Espanha, e Grécia em Perspectiva Comparada

OpenAIRE

Pitcher, Anne

2016-01-01

Andre Freire has produced an exhaustive study of ideological orientations in the relatively new democracies of southern Europe – Portugal, Spain and Greece. The primary objective of the book is to ascertain how ideological and party identities in these new democracies compare with those in the old democracies of Western Europe such as Belgium, France, Great Britain, Germany, and Italy and the degree to which divisions along a left-right dimension continue to define political values across Eur...

Fatores Associados à Obesidade e ao Padrão Andróide de Distribuição da Gordura Corporal em Mulheres Climatéricas Factors Related to Obesity and Android Pattern of Body Fat Distribution in Climacteric Women

Directory of Open Access Journals (Sweden)

Diana Beatriz Filip Raskin

2000-08-01

Full Text Available Objetivos: descrever as características de um grupo de mulheres climatéricas, conhecer a freqüência e os fatores associados à obesidade e ao padrão andróide de distribuição da gordura corporal. Métodos: estudo observacional com 518 pacientes com idade entre 45 e 65 anos em um ambulatório de climatério. Foram considerados a idade, cor, status menopausal, tempo de menopausa, atividade física, tabagismo, dieta, etilismo, antecedentes pessoais e familiares de hipertensão, diabetes, doença cardiovascular, dislipidemia e obesidade. O índice de massa corpórea e a relação das medidas cintura/quadril foram variáveis dependentes. Na análise estatística utilizaram-se os testes de Wilcoxon, c² de Pearson, com nível de significância de 5%, e análise múltipla por regressão logística. Resultados: mais de dois terços das participantes eram não-obesas com perfil andróide e menopausadas. Aproximadamente um quarto tinha atividade física adequada, era tabagista, metade referiu dieta inadequada e um quinto era etilista. Pacientes com perfil andróide apresentaram média etária maior que mulheres com padrão ginecóide. Antecedentes pessoais de obesidade, hipertensão, diabetes e história familiar de diabetes relacionaram-se com obesidade e padrão andróide. O status pós-menopausa associou-se significativamente ao perfil andróide. Conclusões: a maioria das mulheres foram não-obesas com perfil andróide, brancas, pós-menopáusicas, sedentárias, não-tabagistas nem etilistas. Os principais fatores associados à obesidade e padrão andróide foram os antecedentes pessoais de obesidade, hipertensão arterial, diabetes, história familiar de diabetes e, particularmente, o status pós-menopausa com o perfil andróide.Purpose: to describe sociodemographic characteristics of a group of climacteric women in order to discover the frequency and the variables associated with obesity and android profile of body fat distribution. Methods

Fitting the datum of SANS with Pxy program

International Nuclear Information System (INIS)

Sun, Liangwei; Peng, Mei; Chen, Liang

2009-04-01

The thesis introduces the basic theory of Small-Angle neutron scattering, enumerates several approximate law. It simply describes the components of Small-Angle neutron spectrometer (SANS) and the parameters of SANS of Budapest Neutron Center (BNC) in Hungary. During the period of studying at Budapest Neutron Center in Hungary, the experiments of wavelength calibration was carried out with SIBE and the SANS experiments of sample Micelles. The experiments are briefly introduced. Pxy program is used to fit these datum, and the results of wavelength and sizes of sample Micelles are presented. (authors)

Hispanics in Army ROTC: Problems with Recruiting and Commissioning

Science.gov (United States)

1978-06-09

part-time elementary school En- glish teachers, yet even they often had difficulty expressing them- selves ( orally and in writing) oozTectly in...desired learning outcomes expected from ROTC graduates is that they have the "ability to communicate effectively both orally and in writ- ing.඘ This...Andres. El Dilema Puertorriquefos Lenguaje do Libertad o LengaJe de Dominacion. San Juan, Ediciones Bayoan, 1973. . Nuevo Enfoaue Sobre el Desarrollo

Translations on Narcotics and Dangerous Drugs, Number 281.

Science.gov (United States)

1977-01-21

Mr F. Potts, said the State’s industry was of economic and national strategic importance. He said Australia would soon become one of the world’s...have their headquarters in those highly industrialized nations. These statements made by Pedro Ojeda Paullada (currently Secretary of Labor and...involved in the drug traffic. She lives on Tepanco Street, Parque San Andres District, Coyoacan where the marihuana was found. Jovita Ramirez Garcia

Holocene slip rates along the San Andreas Fault System in the San Gorgonio Pass and implications for large earthquakes in southern California

Science.gov (United States)

Heermance, Richard V.; Yule, Doug

2017-06-01

The San Gorgonio Pass (SGP) in southern California contains a 40 km long region of structural complexity where the San Andreas Fault (SAF) bifurcates into a series of oblique-slip faults with unknown slip history. We combine new 10Be exposure ages (Qt4: 8600 (+2100, -2200) and Qt3: 5700 (+1400, -1900) years B.P.) and a radiocarbon age (1260 ± 60 years B.P.) from late Holocene terraces with scarp displacement of these surfaces to document a Holocene slip rate of 5.7 (+2.7, -1.5) mm/yr combined across two faults. Our preferred slip rate is 37-49% of the average slip rates along the SAF outside the SGP (i.e., Coachella Valley and San Bernardino sections) and implies that strain is transferred off the SAF in this area. Earthquakes here most likely occur in very large, throughgoing SAF events at a lower recurrence than elsewhere on the SAF, so that only approximately one third of SAF ruptures penetrate or originate in the pass.Plain Language SummaryHow large are earthquakes on the southern San Andreas Fault? The answer to this question depends on whether or not the earthquake is contained only along individual fault sections, such as the Coachella Valley section north of Palm Springs, or the rupture crosses multiple sections including the area through the San Gorgonio Pass. We have determined the age and offset of faulted stream deposits within the San Gorgonio Pass to document slip rates of these faults over the last 10,000 years. Our results indicate a long-term slip rate of 6 mm/yr, which is almost 1/2 of the rates east and west of this area. These new rates, combined with faulted geomorphic surfaces, imply that large magnitude earthquakes must occasionally rupture a 300 km length of the San Andreas Fault from the Salton Sea to the Mojave Desert. Although many ( 65%) earthquakes along the southern San Andreas Fault likely do not rupture through the pass, our new results suggest that large >Mw 7.5 earthquakes are possible on the southern San Andreas Fault and likely

City of San Francisco, California street tree resource analysis

Science.gov (United States)

E.G. McPherson; J.R. Simpson; P.J. Peper; Q. Xiao

2004-01-01

Street trees in San Francisco are comprised of two distinct populations, those managed by the city’s Department of Public Works (DPW) and those managed by private property owners with or without the help of San Francisco’s urban forestry nonprofit, Friends of the Urban Forest (FUF). These two entities believe that the public’s investment in stewardship of San Francisco...

The Sanrafaelic remagnetization revisited: Magnetic properties and magnetofabrics of Cambrian-Ordovician carbonates of the Eastern Precordillera of San Juan, Argentina

Science.gov (United States)

Fazzito, Sabrina Y.; Rapalini, Augusto E.; Poiré, Daniel G.

2017-11-01

Systematic rock-magnetic and magnetofabric studies were carried out on samples from twenty-three palaeomagnetic sites distributed on the La Laja, Zonda, La Flecha, La Silla and San Juan Formations, which constitute a thick middle Cambrian to early Ordovician carbonate sequence exposed in the Eastern Precordillera of Argentina. Previous palaeomagnetic studies on these rocks showed that this succession is characterized by a recent full overprint in the lower levels and a post-tectonic Permian remagnetization associated to the widespread Sanrafaelic event in the upper part. Our investigation revealed that the fluctuations of the magnetic properties are stratigraphically (lithologically) controlled. Anisotropy of magnetic and anhysteretic susceptibility measurements defined consistent fabrics along the entire section that switch progressively from "inverse", at the bottom, to "normal", at the top, with "intermediate" fabrics occurring mainly at medium levels. Degree of dolomitization significantly affects many rock-magnetic parameters, but appears unrelated to the presence of the Permian remagnetization, which is determined to reside in magnetite despite the complex magnetic mineralogy shown by the studied carbonates. Hysteresis cycles of rocks affected by the Sanrafaelic remagnetization are governed by ferromagnetic fractions showing a clear difference respect to those not affected and characterized by the dominance of paramagnetic or diamagnetic signals. The magnetic fabrics and mineralogical characterization rule out a thermoviscous origin and suggest a chemical remagnetization originated in the authigenic formation of magnetite for the Sanrafaelic overprint. X-ray diffraction analyses indicate that clay minerals are virtually absent in the whole succession with no traces of illite in any sample, discarding burial diagenesis of clay minerals for the origin of the remagnetization. Lack of late Palaeozoic magmatic rocks near the study area difficults correlation of

Trouble Brewing in San Francisco. Policy Brief

Science.gov (United States)

Buck, Stuart

2010-01-01

The city of San Francisco will face enormous budgetary pressures from the growing deficits in public pensions, both at a state and local level. In this policy brief, the author estimates that San Francisco faces an aggregate $22.4 billion liability for pensions and retiree health benefits that are underfunded--including $14.1 billion for the city…

Atención Odontológica Integral a Personas que Viven Con VIH-SIDA (Pvvih en el Hospital San Juan de Dios de Bogotá

Directory of Open Access Journals (Sweden)

John Harold Estrada Montoya

2011-10-01

Full Text Available Normal 0 21 false false false ES-CO X-NONE X-NONE Este artículo presenta el panorama del surgimiento del programa de atención odontológica a personas viviendo con VIH/SIDA (PVVS que fue implementado en el Hospital San Juan de Dios de Bogotá y que funcionó hasta el cierre definitivo del Hospital durante la presidencia de Andrés Pastrana Arango. Se presentan las diferentes etapas vividas en el programa y se destacan la implementación de los primeros protocolos de bioseguridad en el país que luego fueron tomados como modelo para todo el país bajo la supervisión del Ministerio de Salud. Luego se presentan las investigaciones en lesiones orales  asociadas al VIH y el significado clínico e inmunológico de estas lesiones para los pacientes y el equipo de salud. Finalmente se presentan los estudios relacionados con las lesiones más prevalentes (Candidosis oral y enfermedad periodontal y los factores relacionados con la adherencia a los tratamientos antirretrovirales, de gran importancia para pacientes y cuidadores, siendo estos los últimos estudios realizados antes del cierre definitivo del programa.

77 FR 66499 - Environmental Impact Statement: San Bernardino and Los Angeles Counties, CA

Science.gov (United States)

2012-11-05

... San Bernardino, 285 East Hospitality Lane, San Bernardino, California 92408 (2) Sheraton Ontario..., November 13, 2012 from 5-7 p.m. at the Hilton San Bernardino, 285 East Hospitality Lane, San Bernardino...

33 CFR 110.74c - Bahia de San Juan, PR.

Science.gov (United States)

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Bahia de San Juan, PR. 110.74c Section 110.74c Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.74c Bahia de San Juan, PR. The waters of San Antonio...

Effectiveness factors for a commercial steam reforming (Ni) catalyst and for a calcined dolomite used downstream biomass gasifiers

Energy Technology Data Exchange (ETDEWEB)

Corella, J; Narvaez, I; Orio, A [Madrid Univ. (Spain). Dept. of Chem. Eng.

1997-12-31

A commercial steam reforming catalyst from BASF, the G1-25 S one, and a calcined dolomite, Norte-1, from Cantabria-Spain, have been used, once crushed and sieved to different particle fractions between 1.0 and 4.0 mm. The materials have been tested downstream small pilot biomass gasifiers, bubbling fluidized bed type, gasifying with air and with steam. The Thiele modulus and the effectiveness factor have been calculated at temperatures of 750-850 deg C. It is experimentally shown that diffusion control plays an important part when particle size is larger than ca. 0.5 mm. This has to be taken into account when comparing the quality of the solids for tar elimination. (author) (5 refs.)

Effectiveness factors for a commercial steam reforming (Ni) catalyst and for a calcined dolomite used downstream biomass gasifiers

Energy Technology Data Exchange (ETDEWEB)

Corella, J.; Narvaez, I.; Orio, A. [Madrid Univ. (Spain). Dept. of Chem. Eng.

1996-12-31

A commercial steam reforming catalyst from BASF, the G1-25 S one, and a calcined dolomite, Norte-1, from Cantabria-Spain, have been used, once crushed and sieved to different particle fractions between 1.0 and 4.0 mm. The materials have been tested downstream small pilot biomass gasifiers, bubbling fluidized bed type, gasifying with air and with steam. The Thiele modulus and the effectiveness factor have been calculated at temperatures of 750-850 deg C. It is experimentally shown that diffusion control plays an important part when particle size is larger than ca. 0.5 mm. This has to be taken into account when comparing the quality of the solids for tar elimination. (author) (5 refs.)

San Francisco Accelerator Conference

International Nuclear Information System (INIS)

Southworth, Brian

1991-01-01

'Where are today's challenges in accelerator physics?' was the theme of the open session at the San Francisco meeting, the largest ever gathering of accelerator physicists and engineers

Estimate the potential production of electricity: a case study of the sanitary landfill of Santo Andre, Sao Paulo, Brazil; Estimativa do potencial de producao de eletricidade: estudo de caso do aterro sanitario de Santo Andre, Sao Paulo, Brasil

Energy Technology Data Exchange (ETDEWEB)

Silva, Elissando Rocha da; Moreira, Joao M. L.; Candiani, Giovano [Instituto Federal de Educacao, Ciencia e Tecnologia de Sao Paulo (IFSP), SP (Brazil)

2010-07-01

The recovery of the biogas generated from sanitary landfills, associated to its energetic use has been widely discussed. Thus, this paper aims to estimate the potential production of electric energy from sanitary landfill Santo Andre-SP. The biogas production was estimated using the rate of deposition of solid wastes in the landfill, using some mathematical models with parameters suggested by two models: LanGEM-USEPA (conventional landfill) and Word Bank. These results indicate that the potential of biogas production will be approximately 11 x 10{sup 6} Kg of methane/year in 2017 and production of electric energy in that year will be approximately 32,000 MWh, considering an of 75% over collection of biogas. (author)

Trouble Brewing in San Diego. Policy Brief

Science.gov (United States)

Buck, Stuart

2010-01-01

The city of San Diego will face enormous budgetary pressures from the growing deficits in public pensions, both at a state and local level. In this policy brief, the author estimates that San Diego faces total of $45.4 billion, including $7.95 billion for the county pension system, $5.4 billion for the city pension system, and an estimated $30.7…

Corps sans organes et anamnèse

DEFF Research Database (Denmark)

Wilson, Alexander

2011-01-01

Je trace certains liens entre le corps sans organes de Deleuze et Guattari et les principes de l’organologie générale que décrit Bernard Stiegler.......Je trace certains liens entre le corps sans organes de Deleuze et Guattari et les principes de l’organologie générale que décrit Bernard Stiegler....

Coastal Cactus Wren, San Diego Co. - 2009 [ds702

Data.gov (United States)

California Natural Resource Agency — The San Diego Multiple Species Conservation program (MSCP) was developed for the conservation of plants and animals in the southeast portion of San Diego County....

Coastal Cactus Wren, San Diego Co. - 2011 [ds708

Data.gov (United States)

California Natural Resource Agency — The San Diego Multiple Species Conservation program (MSCP) was developed for the conservation of plants and animals in the southeast portion of San Diego County....

Arhitektuuri sihtkapitali tegevuspreemia 2014 = The Endowment for architecture's prize for activity in the field of architecture 2014 / Epp Lankots, Andres Kurg ; kommenteerinud Ignar Fjuk

Index Scriptorium Estoniae

Lankots, Epp, 1976-

2015-01-01

Eesti Kultuurkapitali Arhitektuuri sihtkapitali tegevuspreemia 2014: Epp Lankotsa doktoriväitekiri "Moodsa arhitektuuri kriitiline historiograafia. Modernsuse käsitlused Leo Gensi ja Leonhard Lapini arhitektuuriajaloolistes tekstides 1960.-1980. aastail"; Andres Kure doktoriväitekiri ""Boundary disruptions: late-soviet transformations in art, space and subjectivity in Tallinn 1968-1979" ("Segilöödud piirid, hilisnõukogude muutused kunstis, ruumis ja subjektsuses Tallinnas aastatel 1968-1979")

Cacao use and the San Lorenzo Olmec

Science.gov (United States)

Powis, Terry G.; Cyphers, Ann; Gaikwad, Nilesh W.; Grivetti, Louis; Cheong, Kong

2011-01-01

Mesoamerican peoples had a long history of cacao use—spanning more than 34 centuries—as confirmed by previous identification of cacao residues on archaeological pottery from Paso de la Amada on the Pacific Coast and the Olmec site of El Manatí on the Gulf Coast. Until now, comparable evidence from San Lorenzo, the premier Olmec capital, was lacking. The present study of theobromine residues confirms the continuous presence and use of cacao products at San Lorenzo between 1800 and 1000 BCE, and documents assorted vessels forms used in its preparation and consumption. One elite context reveals cacao use as part of a mortuary ritual for sacrificial victims, an event that occurred during the height of San Lorenzo's power. PMID:21555564