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Sample records for principales substances minerales

  1. Niger Republic mineral planning : Part four Second volume : Main mineral substances specific study and their geological context; Plan mineral de la Republique du Niger : Tome IV : 2e Volume : Etude specifique des principales substances minerales et leur contexte geologique

    Energy Technology Data Exchange (ETDEWEB)

    Franconi, Antoine; Joo' , Julien; Zibo, Idde

    1981-07-01

    This volume describes Niger Republic mineral substances capable of rising economic interest. After relating minerals occurrence , indices and deposits types, conclusions and recommendations have been made for mineral prospecting. Mineral substances described are : Copper, lead and zinc, molybdena, iron, manganese, titanium, vanadium, nickel and chrome ( cobalt and platinoid ), lithium, lignite, diamond and diverse substances rare earth, beryllium, silver, bismuth arsenic and antimony, barytine, alunite, talc and asbestos ( graphite and diatomite) [French] Ce volume decrit les substances susceptibles de presenter un interet economique au Niger. Apres avoir relate leurs occurrences , indices et types de gisement auxquels elles appartiennent des conclusions et recommendations ont ete faites pour la prospection. Les substances ainsi decrites sont : le cuivre, le plomb et le zinc, le molybdene, le fer, le manganese, le titane et le vanadium, le nickel et le chrome (Cobalt et platinoides), le lithium, le lignite, le diamant et les substances diverses ( terres rares, beryllium), argent, bismuth, arsenic et antimoine, barytine, alunite, talc et amiante (graphite et diatomite)

  2. Vitaminas y minerales contra el estrés

    OpenAIRE

    Espinosa Hernández, Jose Antonio; Cué Brugueras, Manuel

    2001-01-01

    Se define el estrés como tal, así como los tipos de tratamientos para este. Se expresan las relaciones entre las multivitaminas y minerales y el estr��s y se dan criterios sobre su uso. Se concluye que los principales medicamentos antiestrés encontrados contienen las vitaminas E, B1, B2, B3, B5, B6, B12,C, ácido fólico y minerales cinc y hierro; entre los principales fabricantes se encuentran: Lederle, Rugby, Ayerst, Scherin, Vicks Health Care, Goldline, Squibbs, Miles Inc. y Natural Life.The...

  3. en minerales sulfurados

    Directory of Open Access Journals (Sweden)

    Olger Giovani Mendoza Villabona

    2006-01-01

    Full Text Available La gran dificultad que se presenta en la disolución del oro por cianuración, cuando se encuentra en minerales sulfurados, es un hecho ampliamente conocido en la metalurgia extractiva. En este trabajo se evaluó la interferencia del ión sulfuro (S-2, así como el efecto del catalizador LeachWell 60X® (LW y del ión Pb+2 en el comportamiento electroquímico del proceso de disolución de oro con cianuro. Se emplearon métodos potenciodinámicos de barrido lineal y cíclico para estudiar la oxidación anódica del oro y la reducción catódica del O2 bajo condiciones de cianuración convencional (1.000 p. p. m. de CN- y O2 ambiental 5,2 p. p. m. y de cianuración intensiva (25.000 p. p. m. de CN- y saturado de O2 24 p. p. m.. Los resultados indican que el Pb+2 y el LW se comportan de manera similar y que incluso bajas concentraciones de S-2 (entre 0,5 y 10 p. p. m. tienen un efecto negativo en la disolución anódica del oro. La velocidad de disolución del metal precioso se predijo aplicando la teoría del potencial de mezcla. El incremento significativo en la velocidad total de la reacción se atribuye principalmente al aumento en la velocidad de reducción del O2.

  4. Vitaminas y minerales contra el estrés

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    Jose Antonio Espinosa Hernández

    2001-04-01

    Full Text Available Se define el estrés como tal, así como los tipos de tratamientos para este. Se expresan las relaciones entre las multivitaminas y minerales y el estr��s y se dan criterios sobre su uso. Se concluye que los principales medicamentos antiestrés encontrados contienen las vitaminas E, B1, B2, B3, B5, B6, B12,C, ácido fólico y minerales cinc y hierro; entre los principales fabricantes se encuentran: Lederle, Rugby, Ayerst, Scherin, Vicks Health Care, Goldline, Squibbs, Miles Inc. y Natural Life.The stress as such, as well as the types of treatment are defined. The relations between the multivitamins and minerals and the stress are described and criteria about their use are given. It is concluded that the main antistress drugs found contain vitamins E, B1, B2, B3, B5, B6, B12, C, folic acid and the minerals zinc and iron. Lederle, Rugny, Ayerst, Scherin, Vicks Health Care, Goldline, Squibbs, Miles Inc. and Natural Life are among the main manufacturers.

  5. Niger Republic Mineral Planning : Part IV - first volume : Main mineral substances specific study and their geological context; Plan Mineral de la Republique du Niger : Tome IV - 1er volume : Etude specifique des principales substances minerals et leur contexte geologique

    Energy Technology Data Exchange (ETDEWEB)

    Franconi, Antoine; Joo' , Julien; Zibo, Idde

    1981-07-01

    This volume contains the detailed study of mineral substances industrially exploited to date : uranium, coal, non metallic building materials and public activities, and non conventionally exploited substances, that are : tin, columbite-tantalite, tungsten, gold, phosphates and evaporates. [French] Ce volume contient l'etude detaillee des substances minerals exploitees industriellement a ce jour : l'uranium, le charbon, les materiaux non metalliques de construction et de travaux publics et les substances exploitees artisanalement qui sont : l'etain, la Colombo-tantalite, le tungstene, l'or, les phosphates et les evaporates.

  6. Usos y ocurrencia de los principales metales que se producen en Sonora

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    Eva Lourdes Vega Granillo

    2013-06-01

    Full Text Available México posee gran cantidad de recursos minerales producto de la naturaleza, por lo que su explotación a través de la minería y el cuidado del medio ambiente deben de coexistir de una manera armoniosa. A través del tiempo la minería ha desempeñado un papel fundamental en la vida económica del país, ya que su desarrollo ha permitido que en la actualidad sea la tercera fuente generadora de ingresos. Asimismo, la minería permite que se desarrollen actividades, como la agrícola y la industrial (automotriz, acerera, cinematográfica, etcétera, entre otras. A nivel mundial, México ocupa el primer lugar en producción de plata, existiendo otros minerales metálicos importantes, como el oro, plomo, hierro, zinc, cobre, uranio y torio. Se considera a la minería como una actividad económica primaria debido a que los minerales se toman directamente de la naturaleza, encontrándose sobre la superficie o bien en el subsuelo a diferentes profundidades. Algunos de los principales centros mineros se localizan al norte del país, pero en los últimos años, Sonora se ha revelado como el estado productor de minerales más importante de México. Los principales minerales son: cobre y metales preciosos, como el oro y la plata. Por ello en el presente artículo, se mencionan los usos más comunes de estos metales, así como su ocurrencia en el estado, y su importancia económica a escala regional.

  7. An??lisis geoestad??stico en el estudio de la explotaci??n de los recursos minerales

    OpenAIRE

    Chica Olmo, Mario

    1987-01-01

    La Tesis Doctoral del Sr. Chica Olmo constituye una aproximaci??n geoestad??stica al estudio de explotaci??n de los recursos minerales de modo que en la memoria se recogen las principales conclusiones metodol??gicas te??ricas y practicas alcanzadas a trav??s de diferentes estudios y proyectos llevados a cabo en el dominio minero referentes a dep??sitos de naturaleza variada como carb??n uranio plomo plata... En gran medida los anteriores estudios han sido realizados en el centro de geoestad??...

  8. Undgå indkøbte mineraler

    DEFF Research Database (Denmark)

    Sehested, Jakob; Jensen, Søren Krogh; Søegaard, Karen

    2010-01-01

    Et forsøg med to økologiske fodringsstrategier har vist, at køer der ikke får tilskud af mineraler, men derimod får en foderblanding med et højt indhold af naturlige mineraler og vitaminer, har samme foderoptagelse, mælkeproduktion og reproduktion, som køer på en mere traditionel foderration...

  9. Influencia sobre el extractable de níquel de los minerales oxidados del yacimiento Punta Gorda

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    Antonio R. Chang-Cardona

    2014-12-01

    Full Text Available El propósito fue validar, a escala industrial, una metodología para períodos largos en una loza de 8 hornos en la empresa productora de níquel Comandante Ernesto Che Guevara, con el fin de crear una base de datos de producción confiable para su procesamiento estadístico y demostrar la influencia del contenido de los principales minerales oxidados sobre el extractable de níquel y la tendencia en el comportamiento del extractable de cobalto. Se demostró, mediante experimentos, durante tres meses de monitoreo, la efectividad del software COMPRAC para obtener la composición racional de 100 kg de varios tipos de mena laterítica que entran a los hornos de reducción. A partir de la base de datos creada se obtuvo, por primera vez, las gráficas que reflejan la influencia del contenido de los principales minerales sobre los extractables de níquel y de cobalto; en el caso del níquel con suficiente sensibilidad y confiabilidad para la toma de decisiones operacionales eficaces en el circuito tecnológico Mina-Preparación de Mineral-Hornos de Reducción

  10. Recursos y alternativas de tratamiento para los minerales de teluro de Sonora (México

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    Aguayo, S.

    1996-02-01

    Full Text Available Tellurium production is limited mainly to that obtained from the treatment of electrolyte muds from copper refineries. However, there are several other sources from which the precious metal tellurides are potentially attractive. This work presents a review of the main localities in Sonora (México, where tellurides have been found. In addition, based upon the physical chemistry fundamentals for tellurium and precious metal tellurides, the aqueous extraction and recovery routes are discussed.

    El teluro es un elemento escaso, pero con un espectro amplio de aplicaciones. Su producción está limitada a la obtenida por el tratamiento de los lodos electrolíticos de las refinerías de cobre. De las fuentes alternativas de teluro, los telururos de metales preciosos son atractivos por la asociación natural de estos dos elementos, con la posibilidad de obtener el teluro como subproducto. Sonora (México, se caracteriza por ser una zona rica en teluros con más de treinta especies registradas. Este artículo describe las principales localizaciones en que se encuentran minerales de teluro en Sonora (México, señalando sus principales características, así como las especies hasta ahora registradas. Se analizan, además, las posibles rutas de extracción y recuperación acuosa de teluro, de acuerdo con la fisicoquímica de los sistemas teluro-metales preciosos.

  11. Principales enfermedades bucodentales en embarazadas

    OpenAIRE

    Méndez de Varona, Yuliet B; Batista Sánchez, Tamara; Peña Marrero, Yamilet; Torres Acosta, Raúl

    2016-01-01

    Introducción: el embarazo constituye un proceso natural que provoca una serie de cambios fisiológicos, patológicos y psicológicos que las convierten en pacientes especiales que demandan cuidados exclusivos. Objetivo: determinar las principales enfermedades bucodentales que afectan a las embarazadas del Policlínico Pedro Díaz Coello. Métodos: Se realizó un estudio transversal de enero de 2014 a enero de 2015 en el Policlínico Pedro Díaz Coello de Holguín a un total de 395 embarazadas que acudi...

  12. Análisis geoestadístico en el estudio de la explotación de los recursos minerales

    OpenAIRE

    Chica Olmo, Mario

    2013-01-01

    La Tesis Doctoral del Sr. Chica Olmo constituye una aproximación geoestadística al estudio de explotación de los recursos minerales de modo que en la memoria se recogen las principales conclusiones metodológicas teóricas y practicas alcanzadas a través de diferentes estudios y proyectos llevados a cabo en el dominio minero referentes a depósitos de naturaleza variada como carbón uranio plomo plata... En gran medida los anteriores estudios han sido realizados en el centro de geoestadística de ...

  13. Bioconcentraciones foliares de elementos minerales en Lippia alba (salvia morada)

    OpenAIRE

    Schroeder, María A; Burgos, Ángela M

    2013-01-01

    Introducción: la salvia morada es un subarbusto aromático, que crece de modo espontáneo en América Central y del Sur. Frecuentemente es cultivada en jardines como ornamental, por su intenso aroma y sus propiedades medicinales y culinarias. No se encontraron estudios sobre parámetros nutricionales en esta especie. Objetivos: determinar las bioconcentraciones foliares de elementos minerales en Lippia alba (Mill.) N. E. Br. ex Britton & P. Wilson que crece naturalmente en el bioambiente del nort...

  14. Aporte de Minerales del mate cocido a la dieta

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    Lorena Francini

    2011-04-01

    Full Text Available Este trabajo surgió como la continuación del trabajo "YERBA MATE... ¿SIMPLEMENTE UN HABITO O UN BUEN ALIMENTO?" en el cual se analizó el contenido total de: K, Mn, Mg, Ca, Fe, Zn, Na, Cu y Ni en once yerbas comercializadas en Uruguay.En la región comprendida por Argentina, Uruguay, Brasil y Paraguay la yerba mate se consume mayoritariamente como mate (extracción en caliente, tereré (extracción en frío y mate cocido (infusión caliente. A los efectos de conocer el aporte de minerales de la yerba a la dieta diaria, se analizó el contenido de K, Mn, Mg, Fe y Zn (por ser los presentes en mayor cantidad en la yerba mate en una simulación de mate cocido, con lo que se determinó que porcentaje de estos es extraído en dicha infusión.Para realizar la simulación de mate cocido, se colocaron 50g de yerba mate en 1L de agua desionizada y se calentó en plancha con agitación hasta alcanzar una temperatura de 99°C. La solución sobrenadante fue filtrada en caliente en filtro de papel de 640W y luego en frío a través de filtro de membrana de 0,45 µm. Los minerales antes mencionados fueron determinados por espectroscopía de emisión óptica (PERKIN ELMER OPTIMA 2100. Obteniéndose como resultado Zn= 2,9mg/L, Fe= 0,36mg/L, Mn= 57mg/L, K= 848mg/L en el extracto preparado como se mencionó anteriormente. Representando una extracción del contenido total de la yerba mate cercano al 100% para potasio y cinc, del 70% para el manganeso y del 2% para el hierro.De los resultados obtenidos se concluye que de consumirse un litro de mate cocido diario preparado en forma similar a la de este trabajo, se cubrirían ampliamente los requerimientos diarios de manganeso, se cubriría el 50% de los requerimientos diarios de magnesio, el 20% de los de potasio y cinc y el 6% de los de hierro.La yerba mate es un alimento ampliamente difundido y en los estratos sociales más bajos llega a sustituir una o más comidas diarias, lo que convierte a la I

  15. Selvforsyning med øko-mineraler og -vitaminer

    DEFF Research Database (Denmark)

    Sehested, Jakob; Jensen, Søren Krogh; Søegaard, Karen

    2010-01-01

    Forskere ved DJF har vist, at det er muligt at opnå et tilstrækkeligt indhold af vitaminer og mineraler i foderrationen til økologiske malkekøer ved at anvende hjemmedyrkede grovfodermidler med en høj andel af mineral- og vitaminrige, grønne fodermidler. Udgivelsesdato: oktober......Forskere ved DJF har vist, at det er muligt at opnå et tilstrækkeligt indhold af vitaminer og mineraler i foderrationen til økologiske malkekøer ved at anvende hjemmedyrkede grovfodermidler med en høj andel af mineral- og vitaminrige, grønne fodermidler. Udgivelsesdato: oktober...

  16. Los recursos minerales y los materiales de construcción

    OpenAIRE

    Bustillo Revuelta, Manuel

    2008-01-01

    Los materiales de construcción son aquellos materiales que se utilizan con un fin constructivo. Muchas sustancias minerales naturales, como la arcilla, las gravas y las rocas se utilizan como materias primas para fabricar productos de construcción en edificación y obra civil (p.e. puentes). En este sentido, la arcilla, la piedra, los metales y las arenas y las gravas son los recursos minerales más básicos utilizados en la fabricación de los materiales de construcción. Algunos recursos mineral...

  17. Effect minerale samenstelling van bodem en plant op de expressie van bladnecrose bij Freesia

    NARCIS (Netherlands)

    Doorduin, J.C.; Bos, van den A.L.

    2003-01-01

    Freesiatelers veronderstellen een relatie tussen de voedingstoestand in de grond, de minerale samenstelling van de plant en de expressie van bladnecrose bij freesia. Op verzoek van de Landelijke Freesiacommissie van LTO is een inventarisatie uitgevoerd op ‘gezonde’ en ‘necrose’ bedrijven naar de

  18. Latinobarómetro 1997: Principales resultados

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    Ismael CRESPO

    2009-11-01

    Full Text Available RESUMEN: El latinobarómetro es quizá la encuesta de opinión pública más importante que, cada año, analiza conjuntamente la realidad latinoamericana y española y que, además, permite la comparación de indicadores entre 18 países. Lo que se nos presenta a continuación son comentarios a los principales resultados extraídos en 1997, comparados con los obtenidos el año anterior, sobre aspectos como el desarrollo político e institucional y el estado de la democracia, junto a otras valoraciones de la realidad económica; ofreciéndonos, con ello, una clara descripción de la evolución de la opinión pública en estos países. Palabras clave: Latinobarómetro, opinión pública.ABSTRACT: The "latin-barometer" is perhaps the most important public opinion survey which analysies the latinamerican and the spanish situation together each year. Moreover it allows the comparition of indicators between eighteen countries. This paper shows the main results obtained during 1997. These results are compared with wihic were obtained on 1996. It comparies issues such as the instituctional and political development and the conditios of democracy; it linked to other valuations of the economic situation. These data offer us a clear description about the evoluction of public opinion in these countries.

  19. Fluoruro en aguas minerales naturales envasadas en España y prevención de la caries dental

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    Francisco Maraver

    2015-01-01

    Conclusiones: Las concentraciones de fluoruro en las aguas minerales naturales comercializadas en España muestran una gran variabilidad. Dado el creciente consumo de las aguas minerales naturales en España, este tipo de información es de suma importancia para poder hacer una correcta utilización de flúor en la prevención primaria de la caries dental.

  20. Aporte de vitaminas y minerales por grupo de alimentos en estudiantes universitarios chilenos

    OpenAIRE

    Samuel Durán Agüero; Susanne Reyes García; María Cristina Gaete

    2013-01-01

    Introducción: La etapa universitaria es un proceso en el cual las personas pasan por periodos prolongados de inactividad física y horarios irregulares de comidas, lo que conlleva al incremento en el consumo de alimentos procesados y de comida rápida. Objetivo: Fue determinar el aporte vitaminas y minerales por grupo de alimentos en la alimentación de estudiantes universitarios. Métodos: Se trabajó con una muestra de 654 estudiantes universitarios chilenos (18-24 años, 54% mujeres), a quienes ...

  1. El estudio de las rocas y minerales en el ciclo medio de la EGB

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    Juan GONZÁLEZ CRESPO

    2009-11-01

    Full Text Available El estudio de las rocas y minerales ha sido generalmente escaso en estos niveles de EGB. La mayoría de las veces se limita a conceptos teóricos elementales y en no pocas ocasiones a contenidos ajenos a la experiencia del alumnado. Quizá esto se deba a la indudable complejidad en algunos aspectos de estas materias, dificultad terminológica que presenta en no pocas ocasiones, escasez de recursos en los centros ... Todo lo cual ha llevado a que estas materias se consideren más propias de niveles superiores y, por tanto, algo ajeno para los alumnos de este ciclo.

  2. Elaboración de fichas de autoaprendizaje para el estudio de minerales y rocas

    OpenAIRE

    Muñoz Cervera, María Concepción; Guardiola Bartolomé, José Vicente; Belda, Antonio; Cañaveras, Juan C.; Ordóñez Delgado, Salvador; Rodríguez García, Miguel Ángel

    2016-01-01

    En 2015, se creó la red Banco de imágenes de minerales y rocas, en el contexto del proyecto de “Redes de investigación en docencia universitaria de la Universidad de Alicante”. Como resultado, se está elaborando un banco de imágenes de los materiales de las colecciones docentes de mineralogía y petrología. En esta fase del trabajo se pretende utilizar estas imágenes, obtenidas con los más altos criterios de calidad, para la elaboración de fichas de autoaprendizaje, que los estudiantes puedan ...

  3. Static leaching of Spanish uranium ores; Lixiviacion estatica de minerales espanoles de uranio

    Energy Technology Data Exchange (ETDEWEB)

    Cordero, G; Gasos, P; Merino, J L; Suarez, Y E [Direccion de Plantas Piloto e Industriales, Junta de Energia Nuclear, Madrid (Spain)

    1967-06-15

    The paper summarizes the experience acquired in Spain during seven years of investigation on the static leaching of uranium ores. The operations covered minerals showing wide variations with regard to both uranium content (250 and 2000 ppm) and the type of rock and gangue (granites, shales, sandstones, sulphides, carbonates, limonites etc.). The studies were carried out on quantities of material varying from a few kilograms to several tons. Leaching agents included water, solid reagents (pyrites), alkaline carbonates and sulphuric acid. The systems used consisted of both simple layouts and other, more elaborate schemes including recycling of the liquors. The uranium was recovered from the liquors first by direct precipitation and later by ion-exchange and extraction with amines. (author) [Spanish] La memoria resume la experiercia espanola de siete anos de estudio sobre lixiviacion estatica de minerales de uranio. Se ha estudiado una gran variedad de minerales tanto en lo que respecta a ley de uranio (250 y 2000 ppm), como a la naturaleza de las rocas y gangas (granitos, pizarras, areniscas, sulfuros, carbonatos, limonitas, etc.). Los estudios se han realizado en diferentes escalas, desde kilogramos a varias toneladas. Los agentes de lixiviacion han sido variables: agua, reactivos solidos (piritas), carbonatos alcalinos y acido sulfurico. Los circuitos empleados se refieren tanto a esquemas sencillos, como a otros mas elaborados con recirculaciones de liquido. La recuperacion del uranio de los liquidos se resolvio inicialmente por precipitacion directa, pero luego se efectuo mediante cambio de ion y extraccion con aminas. (author)

  4. CONCENTRACIÓN DE MINERALES DE TITANIO CONTENIDOS EN LAS ARENAS DE PLAYAS DE LA REGIÓN DE ATACAMA - CHILE

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    Luis Valderrama Campusano

    2008-07-01

    Full Text Available El presente trabajo tiene como fin caracterizar y concentrar minerales de titanio contenidos en las arenas de playas de la Región de Atacama. El análisis mineralógico indicó que los principales constituyentes son cuarzo, feldespato, ilmenita, titanita, rutilo y trazas de circonita, monacita y wolframita. Los análisis químicos indican que la ley de TiO2 es de 2,3% y 3,15% para las arenas de Huasco y Caldera, respectivamente. Al retirar el material sobre 0,300 mm, se produce una preconcentración, aumentando las leyes de TiO2 a 5,33% para Huasco y 6,48% para Caldera. Las pruebas de concentración gravitacional fueron realizadas en una mesa Wilfley, y fueron estudiados diferentes ángulos de inclinación de la mesa, para la concentración primaria (2,5°; 3,0°; 3,5º y 4,0° y la limpieza (5,0°; 5,5; 6,0° y 6,5° respectivamente. Los mejores resultados fueron obtenidos usando un ángulo de inclinación de 3,0° para la concentración primaria y 6,0° para limpiar el concentrado. Con estos resultados se diseñó un circuito para las arenas de Huasco, lográndose un concentrado final con una ley de 46,0% de TiO2 y una recuperación de 21,2%, y para Caldera, se obtuvo un concentrado final de 51,3% TiO2 con una recuperación de 17,4%.

  5. Las palmeras en los valles principales de la Amazonia peruana

    Directory of Open Access Journals (Sweden)

    1992-01-01

    Full Text Available LES PALMIERS DES PRINCIPALES VALLEES DE L’AMAZONIE PERUVIENNE. La distribution géographique des espèces de palmiers de l’Amazonie péruvienne est présentée selon les principales vallées. Pour chaque affluent important est donnée la liste des espèces récoltées, et pour chaque espèce sont réunies les références des échantillons d’herbiers, collecteur(s et numéro de collection, ainsi que les herbiers de dépôt. Se presenta la distribución de las palmeras de la Amazonia en función de los valles principales. Por cada río de mayor importancia, se da la lista de las especies colectadas, las referencias de las muestras botánicas, colector(es y número de colección, y los herbarios de depósito de dichas muestras. PALMS OF THE MAJOR RIVER VALLEYS OF PERUVIAN AMAZONIA. Palm species distribution in Peruvian Amazonia is presented according to the major river valleys. The species collected are listed for each tributary valley. The collection references, collector(s and number of the specimen and the herbaria of deposit are given for each species.

  6. Suplementos Minerales a partir de Anamú Petiveria Alliacea l.) y Plátano (Mussa Paradisí-aca l.)

    OpenAIRE

    Bárbara Luna; María Cristina Melo; Erlinda Handal; Estevan Pérez; Ana C. Rodriguez

    2005-01-01

    Es muy conocido en el mundo el uso de los suplementos nutricionales debido al papel que representan como complementos de la dieta cuando esta no es suficiente para satisfacer los requerimientos nutricionales diarios del hombre, de sustancias tales como los minerales, vitaminas, proteínas, etc., que por la importancia que tienen en el metabolismo se consideran esenciales para la vida. Entre otros minerales, se consideran esenciales para aquel, hierro, zinc, cobre, manganeso, selenio, cromo, co...

  7. Modelación y simulación del tanque de contacto y los enfriadores de licor en el proceso de lixiviación carbonato-amoniacal con minerales lateríticos cubanos

    Directory of Open Access Journals (Sweden)

    Angel O. Columbié-Navarro

    2000-03-01

    Full Text Available El presente trabajo muestra los resultados obtenidos por los autores en la investigación y análisis del modelo matemático del tanque de contacto y los enfriadores de licor en el proceso de lixiviación carbonato-amoniacal con minerales lateríticos cubanos, para su regulación automática. Se realiza un análisis de las principales variables que intervienen en el proceso ( en el tanque para el proceso de mezclado y en los enfriadores para el licor. Se propone un modelo matemático dinámico para el tanque de contacto y los enfriadores de licor con balances de masa y energía, expresando todas las dependencias dinámicas en ecuaciones diferenciales no lineales a parámetros concentrados. Se incluye además la simulación con datos reales de la planta.

  8. Aspectos legales al utilizar las principales redes sociales en Colombia

    Directory of Open Access Journals (Sweden)

    Manuel Adolfo Alvarado Carmona

    2017-01-01

    Full Text Available Se analizaron los aspectos legales al utilizar las dos principales redes sociales en Colombia como los son facebook y twitter. Cuando un usuario se conecta a cualquiera de las redes sociales debe hacerlo de forma responsable porque de lo contrario puede incurrir en la violación de la normatividad Colombiana en la cual se encuentran los delitos informáticos, la protección de la información y los datos, injuria y calumnia, ciberacoso y derechos de autor. Se determinaron los problemas que conllevan cuando no se utiliza bien la información en las redes sociales en el ámbito jurídico.

  9. Osteoporosis and prevention. Assessment of mineral density, geometry and biomechanics of bone by means of peripheral quantitative Computed Tomography (pQCT) in premenopausal women assuming phytoestrogens; Osteoporosi e fitoestrogeni: valutazione della densita' minerale ossea mediante tomografia computerizzata quantitativa periferica nelle donne lattoovovegetariane nella premenopausa

    Energy Technology Data Exchange (ETDEWEB)

    Di Leo, C; Tarolo, G L; Bestetti, A; Tagliabue, L; Del Sole, A; Alberti, G [Ospedale San Paolo, Milan (Italy). Servizio di Medicina Nucleare; Cestaro, B [Milan Univ., Milan (Italy). Cattedra e Scuola di Specializzazione in Medicina Nucleare; Pepe, L [ACN-L' Accessorio Nucleare, Cerro Maggiore, MI (Italy). Lab. Nucleari

    2000-04-01

    Aim of the work was to describe the noninvasive assessment of bone mineral density, geometrical and biochemical properties in premenopausal women with dietary intake of phytoestrogens and comparison of these parameters with those of age-matched female subjects with Mediterranean dietary intake lacking in these substances. Volumetric cortical, trabecular and total mineral density and bone geometrical properties were evaluated with peripheral quantitative computed tomography (pQCT) at the distal radius of the non dominant forearm. pQCT showed higher bone mineral density (total and trabecular) and SSI values in premenopausal with dietary intake of phytoestrogens. Despite the lack of statistical significance, these preliminary results, should further support the few literature findings about the potential role of phytoestrogens consumption in preventing trabecular bone loss. However, further studies are warranted to evaluate definitively postmenopausal osteoporosis. [Italian] Scopo del lavoro e' quello di studiare in modo non-invasivo la densita' minerale, le caratteristiche geometriche e biomeccaniche dell'osso in donne lattoovovegetariane nella premenopausa che assumevano con la dieta fitoestrogeni e confrontare questi dati con quelli di donne anch'esse in premenopausa, con dieta di tipo mediterraneo assolutamente priva di questi elementi con azione simil-ormonale. La densita' minerale, le proprieta' geometriche meccaniche dell'osso sono state valutate a livello del radio ultradistale non dominante mediante tomografia computerizzata (TC) quantitativa periferica, che nelle donne in premenopausa con dieta ricca di fitoestrogeni ha evidenziato valori della densita' minerale ossea totale, trabecolare e di resistenza ossea piu' elevati, anche se in modo non significativo, rispetto a quelli dei controlli con dieta mediterranea. Questi risultati preliminari suggerirebbero come l'assunzione quotidiana di fitoestrogeni attraverso la soia potrebbe accompagnarsi a un maggiore

  10. Osteoporosis and prevention. Assessment of mineral density, geometry and biomechanics of bone by means of peripheral quantitative Computed Tomography (pQCT) in premenopausal women assuming phytoestrogens; Osteoporosi e fitoestrogeni: valutazione della densita' minerale ossea mediante tomografia computerizzata quantitativa periferica nelle donne lattoovovegetariane nella premenopausa

    Energy Technology Data Exchange (ETDEWEB)

    Di Leo, C.; Tarolo, G.L.; Bestetti, A.; Tagliabue, L.; Del Sole, A.; Alberti, G. [Ospedale San Paolo, Milan (Italy). Servizio di Medicina Nucleare; Cestaro, B. [Milan Univ., Milan (Italy). Cattedra e Scuola di Specializzazione in Medicina Nucleare; Pepe, L. [ACN-L' Accessorio Nucleare, Cerro Maggiore, MI (Italy). Lab. Nucleari

    2000-04-01

    Aim of the work was to describe the noninvasive assessment of bone mineral density, geometrical and biochemical properties in premenopausal women with dietary intake of phytoestrogens and comparison of these parameters with those of age-matched female subjects with Mediterranean dietary intake lacking in these substances. Volumetric cortical, trabecular and total mineral density and bone geometrical properties were evaluated with peripheral quantitative computed tomography (pQCT) at the distal radius of the non dominant forearm. pQCT showed higher bone mineral density (total and trabecular) and SSI values in premenopausal with dietary intake of phytoestrogens. Despite the lack of statistical significance, these preliminary results, should further support the few literature findings about the potential role of phytoestrogens consumption in preventing trabecular bone loss. However, further studies are warranted to evaluate definitively postmenopausal osteoporosis. [Italian] Scopo del lavoro e' quello di studiare in modo non-invasivo la densita' minerale, le caratteristiche geometriche e biomeccaniche dell'osso in donne lattoovovegetariane nella premenopausa che assumevano con la dieta fitoestrogeni e confrontare questi dati con quelli di donne anch'esse in premenopausa, con dieta di tipo mediterraneo assolutamente priva di questi elementi con azione simil-ormonale. La densita' minerale, le proprieta' geometriche meccaniche dell'osso sono state valutate a livello del radio ultradistale non dominante mediante tomografia computerizzata (TC) quantitativa periferica, che nelle donne in premenopausa con dieta ricca di fitoestrogeni ha evidenziato valori della densita' minerale ossea totale, trabecolare e di resistenza ossea piu' elevati, anche se in modo non significativo, rispetto a quelli dei controlli con dieta mediterranea. Questi risultati preliminari suggerirebbero come l'assunzione quotidiana di fitoestrogeni

  11. Estudio de minerales cubanos para la preparación de resinas compuestas

    Directory of Open Access Journals (Sweden)

    Rubén Álvarez-Brito

    2004-03-01

    Full Text Available Las resinas compuestas o composites se ubican entre los materiales restauradores que se emplean en la reparación de tejido dental dañado. Las cargas inorgánicas que se le incorporan a las resinas compuestas le confieren mejores propiedades físico-mecánicas. Se prepararon resinas compuestas autocuradas a base de Bis-GMA y dimetacrilato de tetraetilenglicol (TEEDGMA, utilizando como carga inorgánica minerales de cuarzo procedente de Santa Lucía y de El Cacahual, caolín de la Isla de la Juventud y sheridanita de Holguín. Los rellenos fueron tratados previamente con metacriloxipropiltrietoxisilano y aminopropiltrietoxisilano como agentes de acoplamiento. Se les determinó la distribución de tamaños de partículas antes y después del tratamiento, y se observó en todos los casos un aumento del tamaño de partícula luego del tratamiento. Además, se determinó el grado de blancura, correspondiendo el mayor valor al cuarzo de El Cacahual. Se realizaron análisis químicos para determinar cuantitativamente los óxidos de silicio, hierro, magnesio, calcio, aluminio y titanio, además plomo y cadmio. Las resinas preparadas con los rellenos fueron evaluadas mediante el ensayo de resistencia a la compresión y comparación de la coloración con resinas comerciales, y se encontró que las preparadas con cuarzo presentan mayor resistencia mecánica y mejor coloración.

  12. Impacto nutricio del consumo de una leche entera adicionada con vitaminas y minerales en niños

    OpenAIRE

    Maulen-Radovan Irene; Villagómez Sandra; Soler Esther; Villicaña Rolando; Hernández-Ronquillo Lizbeth; Rosado Jorge L.

    1999-01-01

    OBJETIVO: Determinar el impacto nutricio del consumo de leche entera fortificada con vitaminas y minerales en niños. MATERIAL Y MÉTODOS: Se hizo un estudio prospectivo, longitudinal, en 227 niños de entre 8 a 60 meses de edad. Se ofreció a los menores 500 ml diarios de leche entera fortificada por 90 días. Se registró ingestión, aceptación, peso, talla, hemoglobina (Hb), hierro (Fe), vitamina B12 y folatos séricos. El análisis estadístico se realizó con medidas de tendencia central y dispersi...

  13. Comportamiento térmico de los minerales no metálicos de Cayo Guan, Cuba

    OpenAIRE

    Callejas, Pío; Barba Martín-Sonseca, María Flora; Fonseca Navarro, Daris E.; Recio, Paloma

    2009-01-01

    [ES] En el macizo de Moa se encuentran lateritas ricas en cobalto y níquel que están siendo explotadas por las compañías mineras debido a su gran interés económico. Pero existen también grandes volúmenes de minerales no metálicos, que no han sido estudiados. En este trabajo se aborda la evolución de las fases a alta temperatura de estos materiales que presentan diferentes relaciones gibsita/caolinita para su posterior aplicación en la industria cerámica. Se ha realizado su caracteriz...

  14. Distribución fraccional de metales y minerales en la laterita de balance del yacimiento Punta Gorda, Moa, Cuba

    Directory of Open Access Journals (Sweden)

    Alberto Hernández-Flores

    2010-03-01

    Full Text Available Laterita de balance es la denominación tecnológica de la mena procesada para la obtención de níquel en Moa mediante proceso Caron, para la cual se ha establecido un contenido de Fe superior a 35 % y no menor del 1% de Ni. El propósito de la investigación fue determinar en la laterita de balance del yacimiento Punta Gorda, la composición química y mineralógica de las clases granulométricas comprendidas en el rango entre 8 y 0,045 mm. Se emplearon técnicas de separación granulométrica por vía húmeda según la serie de Taylor, métodos de difracción y de fluorescencia de rayos X y el análisis térmico diferencial. Se llega a establecer que la laterita de balance es esencialmente ferrosa, y que la mayoría de los minerales en ella contenidos presentan una granulometría específica de concentración, de manera que en los granos minerales mayores de 2 mm se concentran los silicatos de magnesio (olivino y serpentina y el hidróxido de aluminio (gibbsita, en cambio los óxidos de hierro (goethita se concentran en los granos menores de 0,071 mm.

  15. Ancrage dynamique: principales applications Dynamic Positioning: Main Applications

    Directory of Open Access Journals (Sweden)

    Fay H.

    2006-11-01

    Full Text Available L'ancrage dynamique est la technique qui a permis à la recherche pétrolière d'étendre ses possibilités bien au-delà des plateaux continentaux, sans limitation de profondeur, pour des opérations difficiles, ou encore dans un environnement océanométéorologique sévère, comme celui de la mer du Nord et des mers froides avec la présence d'icebergs. Cet article correspond à des extraits de l'ouvrage Ancrage dynamique. Technique et applications , à paraître aux Editions Technip. Après un bref rappel historique et un exposé succinct des caractéristiques des systèmes d'ancrage dynamique, les principales réalisations de navires et de plates-formes semi-submersibles équipées d'un ancrage dynamique sont présentées. La précision du maintien en position, ainsi que les limites opérationnelles des supports considérés sont de même exposées. Enfin la conclusion retrace les avantages de ce procédé, dont l'exceptionnel développement s'applique aussi aux domaines scientifiques et militaires, ainsi qu'à d'autres secteurs industriels que celui des hydrocarbures. Dynamic positioning is the technique that has enabled oil exploration to extend its possibilities far beyond continental shelves, without any limitation of water depth, for difficult operations or else in harsh environments such as for the North Sea and arctic zones with the presence of icebergs. This paper consists of extracts from the book Dynamic Positioning. Technique and Applications , to be published by Editions Technip. After a brief historical review and a succinct survey of the characteristics of dynamic positioning systems, the principal realizations of ships and semi-submersible platforms equipped with a dynamic positioning system are described. The accuracy of position holding capability as well as the operational limits of the supports considered are also described. The conclusion reviews the advantages of this technique, whose exceptional development also

  16. Rocas bajo el microscopio: acercamiento al estudio en lámina delgada de minerales y rocas

    Directory of Open Access Journals (Sweden)

    Patricia Acero Salazar

    2013-01-01

    Full Text Available En este trabajo se presenta una propuesta didáctica destinada a favorecer el acercamiento de los alumnos a una de las técnicas más habituales empleadas para el estudio de las rocas, sedimentos y minerales: la microscopía de luz polarizada. Para conseguir este objetivo, se proporciona a los alumnos un mínimo de conocimientos teóricos que les permite trabajar en grupos notablemente autónomos e identificar algunos de los componentes más frecuentes en distintos tipos de rocas y sedimentos. Con esta actividad, se familiariza a los estudiantes con algunas de las propiedades empleadas en microscopía óptica y con las propiedades de los propios componentes rocosos, y se proporcionan unas herramientas que facilitan el acercamiento a esta faceta del trabajo científico.

  17. Intervalos de referencia de minerales en cerdos confinados de diferentes genéticas y categorías

    Directory of Open Access Journals (Sweden)

    LUNA ML

    2017-08-01

    Full Text Available En Argentina, no existen datos regionales de intervalos de referencia de minerales en cerdos según las líneas genéticas actuales y distintas categorías de producción en sistema intensivo. Por ello, el objetivo del presente estudio fue determinar intervalos de minerales: calcio, fósforo, magnesio, sodio, potasio, hierro, cobre y cinc, en suero de cerdos en establecimientos del centro de Santa Fe y de Entre Ríos. Se trabajó con 300 muestras de sangre de cerdos sanos de dos líneas genéticas diferentes en las categorías de lechones recién nacidos, lechones destetados, hembras nulíparas gestantes seleccionadas fenotípicamente para la reposición del plantel, y hembras multíparas gestantes. Se determinaron las concentraciones séricas de los minerales por espectrofotometría de absorción atómica (FAAS con un equipo Perkin Elmer modelo Analys 200, con métodos oficiales de AOAC. Se analizaron también muestras de agua. Los intervalos de referencia se calcularon utilizando parámetros paramétricos o no paramétricos dependiendo de la distribución de los datos. Los valores medios, medianas, valores mínimo y máximo e intervalos de referencia, para los distintos minerales en cada categoría productiva, se presentan en tablas. Los intervalos de referencia calculados serán útiles para el diagnóstico de deficiencias mineral y la vigilancia nutricional en cerdo de producción de carne. SUMMARY. Mineral reference intervals in confined swine with different genetic background and categories. In Argentina, there is no regional data on mineral reference intervals in swine, according to the genetic lines, categories of production in intensive systems. The objective of this study was to establish ranges of the following serum minerals: calcium, phosphorus, magnesium, sodium, potassium, iron, copper and zinc, in swine farmed in Santa Fe and Entre Ríos. Blood samples were collected from 300 healthy pigs of two different genetic lines belonging

  18. Los depósitos aluviales del paleógeno basal en el sector suroriental de la Cuenca del Duero (provincia de Segovia: evolución y minerales de la arcilla característicos

    Directory of Open Access Journals (Sweden)

    Garzón, M. G.

    1989-04-01

    Sequence», dominated by arid or semiarid alluvial fans. For this reason, this episode presents an important development of duricrusts and palygorskite is the characteristic clay mineral, probably related with the edafic processes found in the frequent calcrete profiles appearing in these units.En este trabajo se estudian las facies detríticas que constituyen el ciclo prearcósico y la base del ciclo arcósico (de edad paleógena del borde suroriental de la cuenca del Duero. La cartografía geológica y la correlación litológica realizadas han permitido diferenciar cuatro unidades litoestratigráficas que, asimismo, presentan distintas asociaciones de minerales de la arcilla: unidad T.1.1., compuesta por arcillas y arenas cuarzosas, en la que la asociación de minerales de la arcilla es illita + caolinita; unidad T.1.2., de arenas cuarzosas con paleosuelos ferruginosos y esmectita corno mineral de la arcilla característico; unidad T.2.1., de conglomerados polimícticos, arenas arcósicas y arcillas, con frecuentes niveles de calcreta y palygorskita como mineral de la arcilla característico; unidad T.2.2., compuesta por arenas arcósicas, con niveles de encostramiento similares a los de la unidad anterior y esmectita e illita como minerales de la arcilla principales. Las dos primeras unidades son transicionales y presentan una relación genética, correspondiendo a una «Primera Secuencia Deposicional», que es granocreciente y representa una evolución progradante desde un sistema braided distal (T.1.1. a un sistema braided proximal (T.1.2., correspondientes a abanicos aluviales húmedos. Las unidades T.2.1. y T.2.2. forman una «Segunda Secuencia Deposicional», granodecreciente a gran escala, y refleja la transición desde partes proximales (T.2.l. a medias (T.2.2. de abanicos aluviales áridos a semiáridos. A partir del estudio mineralógico y sedimentológico puede concluirse que durante la sedimentación de estos materiales tuvo lugar un importante

  19. Substance use - prescription drugs

    Science.gov (United States)

    Substance use disorder - prescription drugs; Substance abuse - prescription drugs; Drug abuse - prescription drugs; Drug use - prescription drugs; Narcotics - substance use; Opioid - substance use; Sedative - substance ...

  20. Minerales, Ácido Fítico y γ-Oryzanol en harinas integrales y salvados de tres variedades de arroz (Oryza Sativa L) cultivadas en Venezuela

    OpenAIRE

    Aguilar-García, Carlos; Hevia, Patricio; Núnez, Máryuri

    2014-01-01

    El propósito de esta investigación fue determinar el contenido de algunos minerales, de ácido fítico y de γ-oryzanol en harinas integrales y salvados de tres cultivares (Cimarrón, Fonaiap 1 y Zeta 15) de arroz (Oryza sativa L) cosechados en Venezuela. Los minerales (Ca, Mg, Fe y Zn) fueron cuantificados por espectrofotometría de absorción atómica, mientras que el fósforo (P) y el ácido fítico fueron estimados a través de un método colorimétrico. El γ-oryzanol se cuantificó por HPLC. En genera...

  1. Principales prácticas de recursos humanos de las PyMEs industriales exitosas.

    Directory of Open Access Journals (Sweden)

    Liliana Rocío López Suárez

    2013-04-01

    Full Text Available El éxito competitivo de la PyME depende en parte de la buena gestión de recursos humanos,por lo que no darle el valor que requiere constituye una de las principales causas de fracasode estas empresas. La responsabilidad de la gestión eficaz de los recursos humanos recae fundamentalmenteen los directivos. La presente investigación tiene como objetivo identificarlos estilos de dirección y las principales prácticas de recursos humanos que llevan a cabo lasPyMEs industriales exitosas de México y España. Para alcanzar los objetivos antes reseñados,se ha realizado un análisis documental, así como entrevistas en profundidad a expertosen el área de recursos humanos. En este trabajo se presentan los principales resultados conrespecto a las prácticas mencionadas.

  2. Redes neuronales artificiales para el análisis de componentes principales. La red de OJA

    Directory of Open Access Journals (Sweden)

    Piedad Tolmos Rodríguez-Piñero

    2000-01-01

    Full Text Available El análisis de componentes principales es una herramienta estadísticomatemática de gran utilidad en multitud de campos, especialmente en el de la compresión de datos. En este artículo se estudia el proceso de la extracción de componentes principales, y se detalla una Red Neuronal Artificial, la red de Oja, diseñada específicamente para el cálculo de la primera componente principal de la matriz de momentos de segundo orden asociada al vector de datos. Se concluye exponiendo algunas redes que generalizan la red de Oja, y permiten extraer el número deseado de componentes principales. Finalmente se explican algunas aplicaciones, fundamentalmente la del procesamiento de imágenes, y la compresión de datos.

  3. Pandora y Thanatia: una visión termodinámica del agotamiento de los recursos minerales

    Directory of Open Access Journals (Sweden)

    Luis Gabriel Carmona

    2015-02-01

    Full Text Available Los recursos minerales son cada vez más escasos. Este fenómeno obedece a la intensa presión ejercida por la industria minera y a los hábitos de consumo humano. Mediante la herramienta del análisis exergético es posible valorar este grado de agotamiento; sin embargo, el “lenguaje” de la termodinámica no es transferido fácilmente desde la ingeniería hacia otras esferas tales como la administración y las políticas públicas. La presente reflexión del agotamiento de recursos ha sido ilustrada de forma didáctica para que el público en general pueda entender su criticidad. Tomando como ejemplo dos cuerpos celestes: Pandora de la película Avatar de James Cameron y la hipótesis de la tierra crepuscular de Thanatia, los autores explican la exergía, el ambiente de referencia e instrumentos para la gestión de recursos. Finalmente se señala la necesidad de un mayor nivel de concientización sobre la importancia en la toma de decisiones hacia el desarrollo sostenible y la protección del patrimonio geológico.

  4. The spectrographic analysis of inorganic impurities in heavy water; Analyse spectrographique des impuretes minerales dans l'eau lourde

    Energy Technology Data Exchange (ETDEWEB)

    Artaud, J; Normand, J [Commissariat a l' Energie Atomique, Service d' Analyses et de Recherches Chimiques Appliquees, Saclay (France). Centre d' Etudes Nucleaires; Vie, R [Commissariat a l' Energie Atomique, Service d' Etude de Traitement des Combustibles Irradies, Saclay (France). Centre d' Etudes Nucleaires

    1961-07-01

    Inorganic impurities in heavy water are determined by two spectrographic methods. First is described the copper-spark method which is sensitive and directly applicable, and is particular useful because of the absence of a support. Secondly the graphite impregnation method is given; this is used when the first method is not applicable (determination of copper) and for the alkali metals. For the usual elements, the sensitivity of the copper spark method is of the order of 0,1 {mu}g/ml whereas for the graphite impregnation method the sensitivity is only 0,3 {mu}g/ml. (author) [French] Les impuretes minerales dans l'eau lourde sont dosees au moyen de deux methodes spectrographiques. On decrit en premier lieu la methode 'copper spark' sensible directement applicable, et particulierement favorable du fait de l'absence de matrice. En second lieu, on decrit la methode d'impregnation du graphite, utilisee lorsque la methode precedente tombe en defaut (recherche du cuivre) et pour les alcalins. Avec la methode 'copper spark' nous obtenons pour les elements courants, des sensibilites de l'ordre de 0,1 {mu}g/ml, alors qu'elles ne sont que de 0,3 {mu}g/ml pour les alcalins doses a l'arc sur graphite impregne. (auteur)

  5. Revisión de los principales modelos teóricos explicativos del maltrato infantil

    OpenAIRE

    Juan Manuel Moreno Manso

    2006-01-01

    En este artículo se describen las cinco formas de maltrato infantil y los principales modelos teóricos que a lo largo de los últimos treinta años han tratado de proporcionar explicaciones sobre los fenómenos de abuso sexual, maltrato físico, abandono físico, maltrato emocional y abandono emocional.

  6. Bioactive substances

    Digital Repository Service at National Institute of Oceanography (India)

    Wahidullah, S.

    Chemistry related to certain bioactive molecules, from Indian Ocean Region, developed into drugs or which served as models for the synthesis of more effective bioactive substances or in use in fundamental studies of physiological and biochemical...

  7. Psychotoxic Substances

    Science.gov (United States)

    1964-11-16

    halluci- nations , disturbances of body perception, depersonalization symptoms, and a "psychotic" status. Also with the derivatives, the individual...the substance had also local anesthetic properties. After clinical testing, ibogaine was then used as stimulans for neurasthenics and convalescents1 1 3...con- siderably disturbed by this group of substances. The optic halluci- nations consist to a small extent in scenic proceedings of actions, more

  8. The key numbers of the mineral raw materials; Les chiffres cles des matieres premieres minerales

    Energy Technology Data Exchange (ETDEWEB)

    Mandil, C. [Directeur General de l`Energie et des Matieres Premieres, France (France)]|[Ministere de l`Industrie, des Postes et Telecommunications et du Commerce Exterieur, 75 - Paris (France)

    1996-12-31

    Mineral raw materials come from fossil reserves or ores resulting from the geologic and climatic history of the Earth. The access to economic development for 80% of the worldwide population and the high rate of demographic growth (probably 8 billions of inhabitants in 2025) are important factors that can greatly multiply the worldwide consumption of ores. In parallel, environmental concerns and the increasing need for a better equilibrium between wildlife preservation and the supply of economic needs, lead to a more reasonable and mastered use of natural resources. The aim of this book is to shade light and give global elements of thoughts on mineral resources, and for the main of those (about 30 metals and mineral substances), to review the most useful data and references about their production and consumption. For each question, chapters are devoted to the situation of France in its worldwide context. One chapter concerns the uranium ores (reserves, production, prices evolution, consumption, economic flux and companies involved). (J.S.).

  9. Avances en los métodos de recuperación de oro y plata de minerales refractarios

    Directory of Open Access Journals (Sweden)

    Parga, J. R.

    1996-08-01

    Full Text Available Recent research work in hydrometallurgical processes for precious metals recovery from refractory ores is analyzed. Advantages and applications are discussed. Likewise, two methods, one stage direct pressure oxidation/cyanidation and pyrometallurgical recovery, are also described. In the first one, gold and silver oxidation and recovery can be carried out in the same reactor simultaneously. A higher than 96 % recovery in less than 90 min can be achieved. As for the pyrometallurgical recovery method, lead paste from automotive discharged batteries is use and no sulfur dioxide is generated. A precious metals recovery higher than 96 % is reached.

    En este artículo se analizan algunos de los avances introducidos en los procedimientos hidrometalúrgicos para la recuperación de los metales preciosos contenidos en minerales refractarios y se describen sus ventajas y aplicaciones específicas. Asimismo, se muestran dos procedimientos, la cianuración oxidante a presión en una etapa y la recuperación pirometalúrgica con plomo de metales preciosos. En el proceso de cianuración oxidante a presión, la oxidación y disolución del oro y de la plata se realizan simultáneamente en el mismo reactor, con recuperaciones de ambos superiores al 96 % en 90 min. Con respecto al método de recuperación pirometalúrgica, se emplea pasta de plomo de baterías de automóviles desechadas, sin que se genere dióxido de azufre, obteniéndose también elevados valores de recuperación de los metales preciosos (> 96 %.

  10. Racionalización de mezclas de minerales de hierro para la obtención de sinterizados de calidad optima

    Directory of Open Access Journals (Sweden)

    Cores, A.

    2009-06-01

    Full Text Available Various iron ores, fluxes and coke, were used to prepare four ore mixtures with different proportions of these minerals. With each mixtures a series of sinters were produced in the pilot plant. Each one of the sinters was characterised by: chemical and granulometric analysis; degradation test on the sinter during reduction in the blast furnace, (RDI test; cold resistance test, (Tumbler Test; reducibility test; determining of softening and melting temperatures; and the determination of the structure of the sinter by electron microscopy. T he conditions of the mixtures and the operational parameters for obtaining the optimum quality of the sinters were established.

    Se utilizaron diversos minerales de hierro, fundentes y coque para preparar cuatro mezclas minerales con distintas proporciones de estos minerales. Con cada mezcla se fabricó una serie de sinterizados en planta piloto. Se caracteriza cada uno de los sinterizados mediante análisis químico y granulométrico, ensayo de la degradación del sinterizado durante la reducción en el horno alto (ensayo RDI, ensayo de la resistencia en frío (ensayo Tumbler, ensayo de reductibilidad; determinación de las temperaturas de reblandecimiento y fusión y determinación de la estructura del sinterizado por microscopia electrónica. Se establecen las condiciones de las mezclas y los parámetros de operación para la obtención de sinterizados de calidad óptima.

  11. Desarrollo del diseño fluidodinámico de un filtro de mangas (tipo pulse - jet) para partículas minerales de origen industrial

    OpenAIRE

    Peralta Castillo, German; Barriga Rivera, Alfredo Nicolas

    2009-01-01

    El presente trabajo desarrolla el diseño fluidodinámico de un filtro de mangas para partículas minerales de origen industrial con su utilización en el control de la contaminación industrial del aire y como medio de recuperación de materia prima o de producto terminado, tratando de ajustar este diseño a las condiciones locales y a las necesidades de nuestro país. La primera parte versa sobre los fundamentos teóricos de la dinámica de partículas y del mecanismo de filtrado necesarios para de...

  12. Ordenación minero-ambiental de los recursos minerales no metálicos y su influencia en el medio ambiente, sector noroeste de Guayaquil

    OpenAIRE

    Ladines Reyes, Lely; Carrion Mero, Paul Cesar

    2009-01-01

    La zona de estudio ubicada al noroeste de Guayaquil, es una gran fuente de recursos minerales no metálicos, utilizada para la fabricación de materiales de construcción, cuya explotación conlleva a un sin número de afecciones al ambiente. La Ordenación Minero-Ambiental, busca minimizar estas alteraciones, sin que cese la explotación mineral, de tal manera que zonifica el territorio de acuerdo a grados de prioridad, y zonas de protección ambiental. Este trabajo utilizó la metodología del ...

  13. Caracterización de comunidades microbianas asociadas a depósitos de minerales secundarios en tubos de lava y minas de agua

    OpenAIRE

    García-Sánchez, A. M.

    2016-01-01

    La presente tesis doctoral representa un trabajo multidisciplinar, donde confluyen diversas especialidades biológicas, geoquímicas y mineralógicas, mediante la realización de un estudio geomicrobiológico exhaustivo de los ambientes de estudio. Los objetivos específicos planteados son los siguientes: 1. Conocer la diversidad de comunidades microbianas subterráneas asociadas a depósitos de minerales secundarios recogidos en minas de agua excavadas en granito y tubos de lava de diferentes ...

  14. Adición de vitaminas y minerales a harinas de maíz y de trigo en México

    OpenAIRE

    Rosado Jorge L.; Camacho-Solís Rafael; Bourges Héctor

    1999-01-01

    En México la deficiencia marginal de algunas vitaminas y minerales afecta la salud y la funcionalidad de un número elevado de mexicanos, por lo que la Secretaría de Salud ha iniciado un programa para promover la adición de nutrimentos a las harinas de trigo y de maíz que se procesan industrialmente. El presente documento expone las bases científicas y tecnológicas para dicha adición. El objetivo primordial es restaurar los nutrimentos que se pierden durante el proceso de obtención de las hari...

  15. Transformaciones actuales del poder punitivo. Caracterización de sus principales rasgos

    Directory of Open Access Journals (Sweden)

    Ricardo Antonio Cita Triana

    2012-12-01

    Full Text Available El documento aborda el tema de las recientes transformaciones del poder punitivo, a partir de dos niveles de análisis: el primero se ocupa de la descripción de los principales elementos contextuales en los que se insertan los cambios; el segundo desarrolla los rasgos generales que caracterizan estas transformaciones del poder punitivo en este momento. El propósito central es desarrollar un diagnóstico que permita detectar los principales y actuales problemas que enfrenta el discurso jurídico-penal y político criminal y, de este modo, contribuir a la determinación de nuevos escenarios de investigación de relevancia en la actualidad.

  16. Análisis de las videotecas de las principales televisiones en España

    OpenAIRE

    De-Mon-Martín, Adrián; Guallar, Javier

    2014-01-01

    El objetivo de este estudio es analizar los archivos audiovisuales de las principales televisiones de España mediante 24 indicadores agrupados en 5 apartados: aspectos generales, contenido, sistema de consulta, presentación de resultados y aspectos audiovisuales. La muestra analizada son las televisiones generalistas españolas con mayor audiencia durante 2013 (Antena 3, Cuatro, La Sexta, Telecinco y TVE1). Los resultados del estudio diferencian los mejores resultados del archivo público de TV...

  17. Cuidados de enfermería en las principales complicaciones de las quemaduras 2012-2013

    OpenAIRE

    Tapia Arroyo, Lucía

    2013-01-01

    Las quemaduras representan una de las patologías más frecuentes, graves e incapacitantes, siendo los accidentes domésticos, de tráfico y laborales sus principales causas. Las quemaduras están influidas por la interacción de los factores biológicos, psicológicos, sociales, económicos, políticos, culturales, éticos, legales, históricos, religiosos y espirituales

  18. Shared Substance

    DEFF Research Database (Denmark)

    Gjerlufsen, Tony; Klokmose, Clemens Nylandsted; Eagan, James

    2011-01-01

    This paper presents a novel middleware for developing flexible interactive multi-surface applications. Using a scenario-based approach, we identify the requirements for this type of applications. We then introduce Substance, a data- oriented framework that decouples functionality from data, and S...

  19. Excise taxes for mineral oils. Investigation of the monitoring. Retrospective of the report; Accijnzen op minerale olien. Toezicht doorgelicht. Terugblik 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-03-30

    December 2003 the Netherlands Court of Audit published a report with the title 'Excise Taxes for Mineral Oils. Investigation of the Monitoring'. The study was carried out in cooperation with the Belgian Court of Audit. The aim of the report was to assess the tasks of the customs with regard to excise taxes on mineral oils (licensing and related procedures). The aim of this report is to review if and whether the Dutch government followed and implemented the recommendations, as formulated in the 2003 report. [Dutch] De Algemene Rekenkamer publiceerde op 13 december 2003 haar onderzoek 'Accijnzen op minerale olien: toezicht doorgelicht. In dit onderzoek, dat gezamenlijk met het Rekenhof van Belgie werd uitgevoerd, is nagegaan in hoeverre de Douane zijn taken op het gebied van de accijns op minerale olien (vergunningverlening, vergunningbeheer en controles) op een goede manier vervult (volgens de eigen voorschriften, risico's in voldoende mate afgedekt enzovoort). Ook is onderzocht in hoeverre er sprake is van een 'administratief gesloten' Europees accijnssysteem, zoals bij de instelling in 1993 werd beoogd.

  20. Control del avance del frente de llama en el lecho de sinterización de minerales de hierro

    Directory of Open Access Journals (Sweden)

    Cores, A.

    2010-06-01

    Full Text Available A sintering pan of 40 cm cubed is loaded with a mixture of iron ores, limestone and coke weighing 110 kg in a sintering pilot plant. In this sintering pan, a series of thermocouples have been introduced at different depths. Tests have been carried out to study the width of the combustion zone and the maximum temperature of the flame front across the sintering bed. For the analysis of the results, a data acquisition system was used. This consisted of two modules connected in serie, for performing the analogue-digital conversion. The analogue entry point is the exit point of the thermocouples and the digital exit point was the temperature average. A computer was used for conserving and storing the data and for carrying out interpolations, simulating the state and evolution of the flame front across the bed.

    En una planta piloto de sinterización se cargan, en la paila cúbica de 40 cm de lado, 110 kg de una mezcla de minerales de hierro, caliza y coque, donde se han introducido una serie de termopares a diferentes profundidades. Se realizan ensayos para estudiar la evolución del ancho de la zona de combustión y de la temperatura máxima del frente de llama a través del lecho de sinterización. Para el análisis de los resultados se utiliza un sistema de adquisición de datos formado por dos módulos conectados en serie, encargados de realizar la conversión analógico-digital. La entrada analógica es la salida de los termopares y la salida digital es la medida de la temperatura. Se dispone de un ordenador para la conservación y almacenamiento de los datos y para realizar interpolaciones que simulan el estado y evolución del frente de llama a través del lecho.

  1. IPP (INNOVACIÓN EN PRODUCTOS Y PROCESOS PARA EL SECTOR DE LAS MATERIAS PRIMAS MINERALES Y ENERGÉTICAS

    Directory of Open Access Journals (Sweden)

    CORREA ESPINAL ALEXANDER

    2010-05-01

    Full Text Available Este articulo proscrita los resultados del proyecto ce Investigación IPP (Innovación ce Procesos y Productos que plantea un análisis profundo y sistémico de las cadenas productivas, basado en el estudio de la productividad y los procesos. Este proyecto se trabajo en 4 fases: Inteligencia, Experimentación. Innovación y Apropiación tecnológica. Estas etapas están dirigidas al mejoramiento continuo ce los procesos, de los productos ce la organización y de las interacciones entre los actores de la cadena productiva de las materias primas minerales y energéticas. En la fase de inteligencia, se estudiaron las características, las ecesidades. el mercado y el entorno de la cadena productiva que son el resultado del aprovechamiento de los recursos naturales y del ambiente En la segunda fase, se caracterizó la formulación, diseño c implantación ce prototipos de procesos y productos que emulen el comportamiento del proceso en un sistema real y sean amigables con el medio ambiente. Teniendo en cuenta las dos primeras fases, la tercera se caracterizó por la formulación y el diseño ce nuevos procesos y productos que mejoren la eficiencia y la productividad. En la última fase del proyecto, se planteó el servicio de apropiación tecnológica que busca transferir innovación y conocimiento de punta a la cadena. Finalmente el resultado ce IPP es la propuesta de un centro de innovación y tecnología en la Universidad Nacional de Colombia, que garantizará la apropiación y adecuación de las soluciones a las cadenas productivas, siendo una innovación para el sector de la minería, los materiales y la energía, y teniendo como principios, productos y procesos amigables con el ambiente.

  2. Efecto del uso de fertilizantes organo-minerales en la producción sostenible de yuca.

    Directory of Open Access Journals (Sweden)

    Cadavid L. L. F.

    2004-04-01

    Full Text Available El ensayo se realizó en tres sitios del departamento del Valle del Cauca, Colombia. Se evaluaron ocho variedades de yuca (tres en Jamundí, tres Buga y dos en Caicedonia. El ensayo se estableció en bloques completamente al azar, la parcela principal tuvo 1.664 m2, el área de cosecha 9 m2 y las raíces se recolectaron a los 10 meses. En el rendimiento de raíces la mezcla física de fuentes minerales, sintéticas orgánicas y el abono órgano-mineral tuvieron efecto positivo y altamente significativo en la producción, especialmente en los cultivares MCOL 2758 (Parrita, CM 523-7 (ICA Catumare, HMC-1 (ICA P13 para Jamundí, Buga y Caicedonia, respectivamente. Para la actividad microbiana del suelo la variación en la producción de CO2 pudo estar influenciada por las propiedades físicas y químicas de los suelos. Palabras claves: Manihot esculenta Crantz, Fertilización órgano-mineral, gallinaza, rendimiento, actividad microbiana. ABSTRACT Effect of the use of organo-mineral and minerals fertilizers on sustainable production of cassava. The test was made in three sites different within the department from the Valley of the Cauca (Jamundí, Buga, Caicedonia. Three varieties were evaluated (Jamundí and Buga and two in Caicedonia, the establishment of the test was of blocks completely at random, with main parcel of 1.664 m2, the harvest area are of 9m2, took place the harvest by roots to the 10 months. The results indicate respectively that at the level by roots, the physical mixture of organic synthetic mineral sources and the organ-mineral installment had a positive and highly significant effect on the production, specially in you will cultivate MCOL 2758 (Parrita, CM 523-7 (ICA Catumare, HMC-1 (ICA P13, for Jamundí, Buga and Caicedonia. For the variation in the CO2 production could have been influenced by the physical and chemical properties of grounds in study Key words: Cassava, fertilization organo-mineral, manure, Yield

  3. Controles alternativos para el gorgojo del frijol (Acanthoscelides obtectus Say en granos almacenados a partir de materiales naturales y minerales

    Directory of Open Access Journals (Sweden)

    Carlos Ernesto Lopez-Monzon

    2017-03-01

    Full Text Available Con el fin de controlar el daño del gorgojo del frijol [Acanthoscelides obtectus (Say], se evaluó la efectividad en polvo de raíces deshidratadas de chilca (Senecio salignus DC., frutos deshidratados de pimienta negra (Piper nigrum L., fragmentos de madera de pino (Pinus oocarpa Schiede, maíz pulverizado (Zea mays L., cascabillo de frijol (Phaseolus vulgaris L., cal mezclada con ceniza, y arena de río. Se evaluaron ocho tratamientos, con cuatro repeticiones cada uno, en arreglo totalmente al azar. Los materiales naturales y minerales fueron colectados en el municipio de Malacatancito, Huehuetenango y el ensayo se montó en el laboratorio del Centro Universitario de Nor Occidente (Cunoroc, empleando por réplica un frasco de vidrio con capacidad de 1 L y aplicando a cada uno 100 g de semilla de frijol, 10 parejas de gorgojos adultos y 1 g de polvo de los materiales evaluados, según su tratamiento. El análisis se realizó 60 días después de la infestación, donde se evaluó: el porcentaje de daño del gorgojo del frijol, número de gorgojos vivos, correlación del porcentaje de daño versus número de gorgojos vivos y porcentaje de germinación del frijol. El polvo de pimienta negra y la mezcla de cal con ceniza evidenciaron los mejores resultados con el menor porcentaje de daño (1.64% y 3.55%, respectivamente. Las variables porcentaje de daño y número de gorgojos vivos marcaron una fuerte correlación con valor de r = .892. Se estableció que ninguno de los materiales utilizados influyó en la viabilidad de la semilla, registrándose porcentajes de germinación por arriba del 97% en todos los tratamientos. Se recomienda implementar estos productos en el almacenamiento del frijol, para contrarrestar los daños ocasionados por la plaga, obteniendo así beneficios económicos, sociales y ambientales.

  4. Impacto nutricio del consumo de una leche entera adicionada con vitaminas y minerales en niños

    Directory of Open Access Journals (Sweden)

    Maulen-Radovan Irene

    1999-01-01

    Full Text Available OBJETIVO: Determinar el impacto nutricio del consumo de leche entera fortificada con vitaminas y minerales en niños. MATERIAL Y MÉTODOS: Se hizo un estudio prospectivo, longitudinal, en 227 niños de entre 8 a 60 meses de edad. Se ofreció a los menores 500 ml diarios de leche entera fortificada por 90 días. Se registró ingestión, aceptación, peso, talla, hemoglobina (Hb, hierro (Fe, vitamina B12 y folatos séricos. El análisis estadístico se realizó con medidas de tendencia central y dispersión en variables dimensionales utilizando prueba t de Student para comparación de promedios y ji² para variables nominales. RESULTADOS: Al inicio de la suplementación 45 niños estaban desnutridos, y 36, anémicos. Al final de la misma estas cifras disminuyeron: 35 desnutridos (p< 0.21 y 18 niños anémicos (p< 0.01. Al inicio nueve niños tenían desnutrición severa y, al finalizar, sólo eran cinco los que la padecían. La comparación ingreso-egreso en los datos antropométricos fue como sigue (media±desviación estándar: Z peso/talla, -0.35±0.88 vs. -0.14±0.9 (p= 0.01; Hb en g/dl, 11±1.3 vs. 11.9±1.9 (p< 0.001; Fe en mg/dl, 108±44 vs. 115±31 (p= 0.06; vitamina B12 en pg/ml, 649±494 vs. 1 053±854 (p< 0.001. El apego y la aceptación fueron de 100 y 85%, respectivamente. CONCLUSIONES: El consumo de leche entera fortificada durante 90 días mejora significativamente el estado nutricio de los niños, reduce significativamente el número de niños con anemia e incrementa los niveles plasmáticos de Hb, Vitamina B12 y folatos.

  5. Principales diferencias entre el Plan General de Contabilidad y el Plan General de Contabilidad Pública

    OpenAIRE

    Rodríguez Pacheco, Gonzalo

    2016-01-01

    Este trabajo consistirá en un análisis entre los aspectos más significativos del Plan General de Contabilidad y Plan General de Contabilidad Pública, en el que se pondrán de manifiesto las principales diferencias en cada una de las partes en las que se estructuran ambos. Concretamente, marco conceptual, criterios de reconocimiento y valoración, cuentas anuales y cuadro de cuentas. Para ello, será fundamental conocer el fin que persiguen cada entidad, para posteriormente, interpretar y aplicar...

  6. La planificación de la movilidad en algunas de las principales ciudades europeas

    OpenAIRE

    Duarte Monedero, Beatriz; Sánchez de Lara, Miguel Ángel

    2011-01-01

    Los mercados del mañana: Bases para su análisis hoy. XXV Congreso Anual AEDEM En este trabajo. se explica la situación actual del transpOIte público en algunas de las principales ciudades europeas, su estructura organizativa y legislativa, planes de movilidad futuros y sislemas de financiación en comparación con la ciudad de Madrid. Asimismo. se sugiere algunas vías complementarias y alternativas de financiación del transporte público. pre-print

  7. Caracterización de las principales cadenas agroalimentarias en Argentina y Brasil

    OpenAIRE

    Martínez Rojas, Natalia Camila; Palacio Botero, Natalia

    2015-01-01

    Cada día es mayor la demanda de alimentos a nivel mundial y menor su oferta debido a múltiples razones, por eso que es de gran importancia encontrar las mejores prácticas para que la cadena de suministro de productos alimenticios sea más eficiente y productiva, no sólo con el fin de llegar a la mayor población posible, sino también de mejorar los rendimientos de cada uno de los participantes de la misma. Este proyecto busca analizar las tres principales cadenas agroalimentarias de Argentin...

  8. Inseguridad alimentaria en los estados de México: un estudio de sus principales determinantes

    Directory of Open Access Journals (Sweden)

    Miguel Ángel Díaz-Carreño

    2016-01-01

    Full Text Available Este artículo presenta un análisis de los principales factores determinantes de la inseguridad alimentaria severa en las entidades federativas de México, para lo cual se utilizó un modelo econométrico de regresión lineal múltiple. Los resultados sugieren que el fenómeno de la inseguridad alimentaria severa en los estados de México durante 2012 responde principalmente a las variables de escolaridad media y crecimiento de la producción per cápita del sector primario.

  9. Inseguridad alimentaria en los estados de México: un estudio de sus principales determinantes

    OpenAIRE

    Miguel Ángel Díaz-Carreño

    2016-01-01

    Este artículo presenta un análisis de los principales factores determinantes de la inseguridad alimentaria severa en las entidades federativas de México, para lo cual se utilizó un modelo econométrico de regresión lineal múltiple. Los resultados sugieren que el fenómeno de la inseguridad alimentaria severa en los estados de México durante 2012 responde principalmente a las variables de escolaridad media y crecimiento de la producción per cápita del sector primario.

  10. Principales insectos plaga, invertebrados y vertebrados que atacan el cultivo del arroz en Ecuador

    OpenAIRE

    MSc. Irán Rodríguez Delgado; Dr. C. Hipólito Israel Pérez Iglesias; Dr. C. Alejandro Rafael Socorro Castro

    2018-01-01

    El trabajo ofrece una revisión bibliográfica actualizada relacionada con la caracterización de los principales insectos plaga, invertebrados y vertebrados que pueden afectar al cultivo del arroz, así como los daños que ocasionan y medidas para su control en Ecuador. La mayor afectación en el cultivo del arroz es ocasionada por la sogata (Tagosodes orizicolus Muir.), que provoca daños directos, producidos por la picadura al momento de alimentarse, o indirectos, al transmitir el virus de la hoj...

  11. Fases minerales portadoras de níquel en el horizonte saprolítico del yacimiento San Felipe

    Directory of Open Access Journals (Sweden)

    Alfonso Chang-Rodríguez

    2015-12-01

    Full Text Available Este artículo reporta el resultado de la caracterización física, química y mineralógica del horizonte saprolítico del yacimiento cubano de lateritas niquelíferas San Felipe. Los análisis por técnicas de DRX, MEB y EDAX mostraron que la capa útil es predominantemente de grano muy fino, menor de 0,074 mm, representando esta fracción alrededor del 80 % en peso como promedio. Las esmectitas son las principales portadoras de Ni (1,0- 4,0 % NiO, seguidas de la goethita (1,0–1,5 % NiO. La serpentina, aunque contiene de un 5,0 % a un 7,5 % de NiO, se encuentran en muy poca cantidad en estos materiales silicatados, al igual que los óxidos de Mn.

  12. TIC y discapacidad. Principales barreras para la formación del profesorado

    Directory of Open Access Journals (Sweden)

    José María Fernández Batanero

    2018-03-01

    Full Text Available Este artículo, teniendo como problemática la Formación Permanente de los Maestros españoles en relación con las TIC aplicadas a personas con discapacidad, analiza las principales barreras para el desarrollo de planes de formación del profesorado y aquellos aspectos que se consideran prioritarios en dicha formación. En la parte empírica del estudio se analizaron 241 entrevistas realizadas a profesionales del sector educativo del estado español (miembros de equipos directivos, coordinadores TIC, directores y asesores tecnológicos de centros de formación del profesorado. Entre las conclusiones podemos destacar que las principales barreras que obstaculizan la realización de actividades de formación de TIC y discapacidad en la mayoría de las comunidades Autónomas vienen determinadas en primer lugar por factores económicos, de tiempo y de actitud del profesorado.

  13. Análisis comparativo de las principales Escuelas de Educación Maternal

    Directory of Open Access Journals (Sweden)

    Matilde Fernández y Fernández-Arroyo

    2013-06-01

    Full Text Available Justificación: Los programas de educación prenatal son una poderosa herramienta para aumentar la salud materno-infantil. Hoy no se conoce el enfoque educativo más eficaz. Objetivo principal: Conocer las diferencias de enfoque y metodología de las principales escuelas de educación maternal. Metodología: Revisión de las bases de datos PubMed, Embase, Lilacs, Scielo y Cochrane desde el año 2000. Revisión de las páginas web de las escuelas. Estudio de la documentación mediante el método comparativo. Análisis mediante una base de datos con el programa Excel. Resultados principales: Se analizan y comparan las 5 primeras escuelas y 10 de las nuevas escuelas emergentes. Conclusión principal: el trabajo permite conocer el enfoque conceptual y la metodología de las escuelas, lo que puede facilitar la elección a los profesionales y el diseño de investigaciones para aumentar la calidad de los programas.

  14. Efectos de dos sistemas de producción en el contenido de minerales en el fruto de Musa AAB Simmonds

    Directory of Open Access Journals (Sweden)

    Guerra Hernández Katty Julia

    2011-12-01

    Full Text Available Los sistemas de producción orgánico y/o ecológico tienen como objetivo garantizar la sostenibilidad y la renovación de base natural, mediante la limitación del uso de productos de síntesis química para favorecer el ambiente y la salud humana. Teniendo en cuenta estas características, se estudió el efecto de los sistemas de producción orgánico y convencional sobre el contenido de nutrientes minerales del fruto del plátano Hartón (Musa AAB Simmonds, durante el proceso de maduración. Las determinaciones se realizaron en la Universidad de Córdoba (Montería, Colombia con el fin de establecer las diferencias en el contenido de minerales en los frutos en ambos sistemas y en diferentes estados de maduración. Se utilizó un diseño completamente al azar con arreglo factorial 2 x 5 y cinco repeticiones. Los factores fueron: sistema de producción y estado de maduración; los cinco niveles del segundo factor correspondieron a los grados de maduración: verde-oscuro (V, verde-claro (VC, amarillo-verde (AV, amarillo (A y muy amarillo (MA. Los resultados obtenidos muestran que entre ambos sistemas de producción y en distintos grados de maduración, se presentan diferencias significativas (P < 0.05 en los contenidos de calcio, magnesio, potasio, sodio, hierro y zinc.

  15. Relación entre susceptibilidad magnética y contenido de minerales pesados en un depósito aluvial

    Directory of Open Access Journals (Sweden)

    Díaz C. Ramiro L.

    1993-10-01

    Full Text Available

    A partir de observaciones realizadas en una perforación a orillas del Rio Nechi en el

    Noreste Antioqueño, se muestra la relación directa que existe entre el contenido de minerales en el dep6sito aluvial y la susceptibilidad magnética, relación que se explica por la semejanza en algunas propiedades físicas de dichos minerales. Mediante un análisis del Espectro de Energía, se verifican estas relaciones.

    A direct relationship between heavy minerals contents and magnetic susceptibility in an alluvial deposit has been observed in samples taken in a bore hole made at the shore of the Nechi river in NE of the Antioquia Department. These results are explained by the similarity of physical properties of these minerals. Analysis of energy spectrum has verified these relations.

  16. Principales protagonistas de la respuesta inflamatoria a la infección

    Directory of Open Access Journals (Sweden)

    Juan Carlos Velázquez Acosta

    1998-06-01

    Full Text Available Se hace una revisión de los principales elementos implicados en la respuesta inflamatoria del individuo a la infección, por el beneficio que este conocimiento reporta al mejor manejo terapéutico de los pacientes. Se revisan los principales protagonistas de la inflamación, desde los detonantes como: lipopolisacárido, peptidoglicano, ácidos lipoteicoico y murámico, hasta los principales mediadores implicados. Se discute el proceso de activación de monocitos y células endoteliales y la repercusión de ello, y se hace un análisis dinámico del proceso de activación en función del tiempo trancurrido desde el comienzo de la infección, y sus etapas fisiopatológicas. Se evidencia el papel protagónico que tiene el propio organismo en el daño producido por la respuesta a la infección, además de la importancia del adecuado equilibrio entre proinflamación y contrarregulación para el pronóstico del enfermo, lo que obliga a tenerlo en cuenta a la hora del tratamiento.A review of the main elements involved in the inflamatory response of the individuals to infection is made, taking into account that this knowledge helps to improve the therapeutic management of patients. The main agents of inflammation are reviewed, starting from detonators such as: lipopolysaccharides, petpidoglycans, muramic acid to the principal mediators involved. The activation process of monocytes and endothelial cells is dicussed, as well as its repercussion. A dynamic analysis of the activation process according to the time elapsed since the onset of the infection and of its physiopathological stages is made. It is demonstrated the fundamental role played by the organism in the damage produced by the response to infection, and the importance of an adequate balance between proinflammation and contraregulation for the patient´s prognosis, which makes it necessary at the time of treatment.

  17. Volumen y asimetría en los principales mercados accionarios latinoamericanos

    Directory of Open Access Journals (Sweden)

    Werner Kristjanpoller

    2012-01-01

    Full Text Available El presente estudio se enfoca en determinar la relación entre los volúmenes de operación y la asimetría de los rendimientos de los principales mercados accionarios latinoamericanos: Argentina, Brasil, Chile, Colombia, México y Perú. Se utiliza el modelo propuesto por Hutson et al. (2008, el cual incluye especificaciones de los primeros tres momentos de los volúmenes de operación comercializados y de los rendimientos de los mercados. La principal conclusión del estudio es el hallazgo de evidencia estadísticamente significativa de la influencia de los volúmenes de transacción y la asimetría de los rendimientos en los mercados accionarios de México, Brasil, Chile, Colombia y Argentina y en menor cuantía en Perú.

  18. LA CONCILIACIÓN PREPROCESAL EN EL SISTEMA PENAL ACUSATORIO Y SUS PRINCIPALES APORTES

    Directory of Open Access Journals (Sweden)

    Dayana Becerra

    2009-01-01

    Full Text Available La aproximación que se efectúa en el presente estudio, inicia con un acercamiento al concepto de conciliación como mecanismo alternativo de resolución de conflictos, estableciendo los rasgos generales de esta figura; para posteriormente analizar el antecedente inmediato de la conciliación preprocesal en la ley 600 de 2.000, que abrió camino para concederle en materia penal a este mecanismo mayor importancia. Subsiguientemente se profundiza en la conciliación preprocesal consagrada expresamente en la ley 906 de 2004, y se analizan los cambios generados, para así conocer sus características, y determinar sus principales aportes, en el marco del sistema penal acusatorio.

  19. IMPACTOS DE LAS CARRETERAS SOBRE LA FAUNA SILVESTRE Y SUS PRINCIPALES MEDIDAS DE MANEJO

    Directory of Open Access Journals (Sweden)

    María del Pilar Arroyave

    Full Text Available El objetivo de este artículo es presentar el impacto de los proyectos viales sobre la fauna silvestre y evaluar las medidas de manejo de estos efectos. Se revisó y analizó la información de diversos estudios realizados en el mundo, al igual que algunos estudios de impacto ambiental de carreteras que se han desarrollado en Antioquia. Se encontró que los principales impactos son el atropellamiento, el aislamiento de poblaciones y el cambio en los patrones reproductivos de la fauna; esto trae como consecuencia la disminución de las poblaciones de especies de fauna silvestre. También se plantean las estrategias comúnmente implementadas para el manejo de los impactos.

  20. Substance Identification Information from EPA's Substance Registry

    Data.gov (United States)

    U.S. Environmental Protection Agency — The Substance Registry Services (SRS) is the authoritative resource for basic information about substances of interest to the U.S. EPA and its state and tribal...

  1. COMPORTEMENT D’UN COMPOSITE FINE MINERALE - CIMENT - BOIS ELABORE A L’AIDE DE DECHETS INDUSTRIELS SOLIDES

    Directory of Open Access Journals (Sweden)

    M.L BENMALEK

    2000-06-01

    Full Text Available Cinq fines minérales de différentes natures minéralogiques et de limites granulaires comparables, provenant de résidus de carrières, ont été traitées pour former le squelette de bétons légers d'isolation. L'allégement et le pouvoir isolant de ces bétons sont obtenus par incorporation de granulats de bois dans la matrice constituée de la fine minérale et de ciment CPA. Dans une première partie, sont présentés les principales caractéristiques de ces fines: minéralogie par diffraction des rayons X, granulométrie laser, conductivité thermique à la sonde TPS, densité sèche par  pycnomètrie à eau et morphologie au MEB. La seconde partie est consacrée à l'étude de l'effet des caractéristiques de ces fines sur le comportement hygrothermique et mécanique de ces bétons élaborés avec une même formulation et un même état de consistance au moulage. Les résultats de ces investigations sont comparés entre eux et  à ceux de matériaux usuels classés par la RILEM.

  2. Diferencias entre la composición sectorial y ocupacional de las principales ciudades chilenas

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    Marcelo Lufín Varas

    2010-08-01

    Full Text Available La planifcación regional y urbana ha tendido a fjarse exclusivamente en la composición sectorial de las economías locales, asumiendo en forma implícita que la estructura de ocupaciones por actividad es similar a lo largo de un país. Si bien este supuesto parece ser cierto para el conjunto del tejido productivo, se encuentran diferencias signifcativas cuando se analizan ocupaciones específcas. Entre ellas destacan aquellas intensivas en conocimiento, las cuales tienden a estar sobrerrepresen-tadas en las principales ciudades. Se propone una metodología para el análisis de la relación existente entre la estructura de ocupaciones y la estructura sectorial y se aplica al estudio de las principales ciudades chilenas en 2002 a partir de la información del Censo de población, con el objetivo de estimar en qué medida estas estructuras divergen y si existen concentraciones relativas de ocupaciones, observándose que aquellas relacionadas con el conocimiento y la toma de decisiones empresariales tienen una presencia mayor que la esperada en el área metropolitana de Santiago.Regional and urban planning have tended to be exclusively focused on the industrial mix of local economies, implicitly assuming that the occupational mix of economic activities is similar throughout a country. Tis assumption seems to be right fom the perspective of the productive system as a whole, however signifcant diferences arise when analyzing certain occupations. Among them, knowledge-intensive occupations stand out and tend to be overrepresented in the main urban areas. A methodolog y is proposed to analyze the relationship between the occupational and industrial structures. Tis methodology is applied to the case of the principal Chilean cities in 2002 using data fom the population Census in order to estimate the extent to which these structures diverge and whether or not there are relative concentrations of occupations. Results show that the presence of managerial

  3. Principales enfermedades que afectan al cultivo del arroz en Ecuador y alternativas para su control

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    Dr. C. Hipólito Israel Pérez Iglesias

    2018-04-01

    Full Text Available En el mundo y en Ecuador el cultivo de arroz constituye uno de los rubros más importantes por el área cultivada que abarca, la producción que alcanza y el aporte alimentario que realiza. A nivel nacional, a pesar de contar con grandes extensiones de terrenos aptos y condiciones climáticas favorables para el cultivo se obtiene baja productividad, debido fundamentalmente a diferentes patologías que disminuyen la rentabilidad del productor arrocero. La investigación se desarrolló con la finalidad de elaborar un material científico mediante consulta de literatura actualizada, relacionado con las características, daños que provocan y medidas para el control de las principales enfermedades que pueden producir afectaciones al cultivo del arroz. En el país el cultivo es afectado principalmente por enfermedades producidas por hongos y virus, entre las que se destacan la quemazón, la cual se presenta en todas las zonas arroceras del país y es la que mayor afectación produce, además la pudrición de la vaina que se presenta de forma esporádica; mientras la Pudrición Negra se ha registrado en las principales provincias productoras (Guayas, Los Ríos y Manabí, además de El Oro; y en menor magnitud por bacterias y nematodos. El VHB y entorchamiento, son patologías producidas por virus que causan daños considerables. Para mantener un adecuado control fitosanitario de las plantaciones de arroz es conveniente, mantener un monitoreo constante de la incidencia de estas amenazas, con la finalidad de determinar el umbral económico de daños, encaminados a establecer controles en el momento oportuno y disminuir las pérdidas. Palabras clave: Cultivo del arroz, enfermedades, alternativas, manejo agrícola.

  4. Private equity y venture capital: Diferenciación y principales características

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    Leonel Arango Vásquez

    2015-03-01

    Full Text Available El propósito de este artículo es explicar, desde la teoría, dos posibles opciones de financiación que tienen las empresas cuando éstas no pueden acceder a las fuentes tradicionales. La industria del Capital Riesgo surge así como una fuente alternativa de financiación. Esta industria opera a través de vehículos especiales de inversión llamados fondos Private Equity y fondos Venture Capital. En general, los primeros invierten en compañías maduras y desarrolladas, mientras que los segundos lo hacen en empresas nacientes y pequeñas. El ciclo de financiación que proveen estos fondos se estructura en tres etapas principales: captación de recursos, inversión y desinversión. En este artículo se explica la diferencia entre los términos Private Equity y Venture Capital, así como las principales características de las etapas mencionadas.Palabras clave: desinversión; Capital Riesgo; captación de fondos; inversión alternativa; pymes. Private equity and venture capital: Differentiation and main characteristicsAbstractThe purpose of this article with a qualitative approach aims to determine, from the theory the business environment, when companies are not capable to obtain financing through traditional sources, the Private Equity industry is viewed as an alternative source of finance for those companies. This industry operates through special investment vehicles named Private Equity Funds and Venture Capital Funds. In general, the former invest in develop and mature firms, the latter focus on infant and small companies. The financial cycle that these funds supply is structured in three main phases: fundraising phase, investment phase, and divestment phase or exit. This paper explains the difference between Private Equity and Venture Capital, as well as the main characteristics of the mentioned phases; through the methodology of content analysis, which aims to continue the research project of Venture Capital Industry in Colombia

  5. Principales causas de muerte en España : el uso de años de vida perdidos

    OpenAIRE

    Arriaga, Eduardo

    1993-01-01

    En este artículo se analiza el nivel y cambio de la mortalidad de españa por causas de muerte desde 1981 a 1986. Primero se consideran grandes grupos de causas de muerte por edades, y posteriormente cada una de las causas principales de muerte. El análisis permite determinar las principales causas de muerte que operaban en españa en los dos años mencionados. Además, se determina el impacto que los cambios de mortalidad de cada causa tuvo sobre la vida humana, y las causas de muerte que más rá...

  6. Principales retos a la inclusión en la educación superior ecuatoriana

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    Yanet González Reyes

    2018-01-01

    Full Text Available La inclusión de grupos tradicionalmente excluidos de la enseñanza superior: pobres, indígenas, discapacitados, negros, entre otros; se ha convertido en un tema de interés y de debate a nivel internacional y nacional. En este sentido, existen algunos vacíos teóricos y prácticos que plantean retos sustantivos a la inclusión, y que, por tanto, constituyen un punto de partida para el avance hacia una verdadera integralidad en la calidad de la enseñanza superior en la región. El objetivo de este artículo es discutir la problemática vigente de la inclusión en la educación superior ecuatoriana, resumiendo sus principales logros y sus mayores retos y aportar recomendaciones para la práctica y la generación de políticas públicas.

  7. La rebelión criolla de la Villa de Oruro. Principales causas y perspectivas

    Directory of Open Access Journals (Sweden)

    Frigerio, José Óscar

    1995-06-01

    Full Text Available Not available.

    Desde la frustrada rebelión de 1739, la villa minera de Oruro soportó continuas disputas de sus principales vecinos criollos con los españoles por el control de los primeros cargos del Cabildo, generándose dos bandos enfrentados. El conflicto se acentuó durante la década de 1760 al surgir el clan Rodríguez, que monopolizó los cargos capitulares sustentándose en su gran poder económico. La década de 1770 presenció no sólo el aumento excesivo de las cargas fiscales y del control burocrático real, sino una particular coyuntura de iliquidez de los mineros criollos que sería detonante de su rebelión en 1781. En confluencia con la sublevación general de Túpac Amaru, la rebelión de la villa entera liderada por los Rodríguez dio como resultado la masacre y saqueo de un grupo de comerciantes españoles. Oruro implico un incipiente polo de poder criollo, con la elaboración de una ideología nacionalista criolla, sustentada en justificaciones ideológicas y un limitado mesianismo. Su carencia de programa independentista produjo una alternancia ambigua de sus líderes criollos entre los polos enfrentados.

  8. R PROJECT: SU APLICACIÓN COMO SOFTWARE LIBRE PARA ANÁLISIS EN COMPONENTES PRINCIPALES

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    Fabricio Bolaños Guerrero

    2011-01-01

    Full Text Available Este artículo es producto de un proyecto de investigación realizado en colaboración con profesores de la Escuela de Matemáticas de la Universidad de Costa Rica (UCR, para dar a conocer una opción de software estadístico llamado R Project. Con este paquete es posible hacer Análisis en Componentes Principales (ACP y representar los resultados usando el Plano Principal y el Círculo de Correlaciones, como herramientas para poder realizar una mejor interpretación de los datos de la tabla (individuos y variables. El software R es de distribución libre, su implementación es sencilla y no requiere de mayores recursos informáticos. Dentro de sus diversas aplicaciones está el ACP, que es una herramienta que se utiliza para la interpretación de la información presentada en una tabla de datos cuantitativos; por lo tanto, las personas investigadoras de diferentes áreas tienen una opción económica y sencilla para realizar Análisis de Datos. Se llevan a cabo dos ejemplos de ACP, donde se muestra un posible uso de la herramienta y se dan las instrucciones sobre cómo realizarlo paso a paso.

  9. Principales factores de riesgo psicológicos y sociales en el adolescente

    Directory of Open Access Journals (Sweden)

    Patricia Herrera Santi

    1999-03-01

    Full Text Available En el presente trabajo se realiza un análisis de los principales factores de riesgo psicosociales que pueden incidir en los adolescentes, y se hace una distinción entre los factores de riesgo psicológicos y los sociales; se considera que el conocimiento más profundo de éstos puede servir de ayuda al médico de la familia en la atención a este grupo social, con el objetivo de prevenir la aparición de futuros problemas de salud.In this paper it is made an analysis of the main psychosocial risk factors that may influence on the adolescents. It is also made a distinction between the psychological risk factors and the social ones. It is considered that a better knowledge of these factors may help the family physician to give attention to this social group in order to prevent the appearance of future health problems.

  10. Efectividad de los programas psicoeducativos dirigidos a cuidadores principales de familiares con enfermedad de Alzheimer

    Directory of Open Access Journals (Sweden)

    Amanda Medina González

    Full Text Available Resumen: Objetivos: El presente estudio se plantea describir la efectividad de los programas psicoeducativos en la disminución de la sobrecarga y la sintomatología derivada de la misma en cuidadores principales de familiares con enfermedad de Alzheimer. Metodología: Se ha llevado a cabo un proceso de revisión bibliográfica en diferentes bases de datos electrónicas nacionales (IME, CUIDEN e internacionales (CINAHL, COCHRANE y MEDLINE, que se ha completado con una búsqueda manual en editoriales electrónicas, guías de práctica clínica y motores de búsqueda y con una búsqueda secundaria de artículos. Se han admitido publicaciones realizadas entre enero de 2000 y febrero de 2014. Resultados: La bibliografía consultada ofrece resultados poco claros. Aunque existe un número importante de estudios en los que las intervenciones psicoeducativas han mostrado resultados positivos, en muchos de los casos no se obtienen los efectos esperados. Conclusiones: Se considera necesario profundizar en el desarrollo de nuevos programas psicoeducativos, superando las limitaciones metodológicas encontradas.

  11. Minerals ontology: application in the environmental field to silicates; Ontologia de minerales: aplicacion en el abito ambiental a los silicatos

    Energy Technology Data Exchange (ETDEWEB)

    Galan Saulnier, A.; Garcia Gimenez, R.

    2010-07-01

    The aim of this paper is to describe the application of an ontology, or up-to-date computerized tool, developed in the field of artificial intelligence and in particular of knowledge engineering, to inert elements, in this case the silicate class, which are minerals of scientific, technical and economic interest. The importance of applying ontology to minerals lies in the fact that these substances are capable of causing negative environmental impacts upon other variables in the natural environment, such as the atmosphere and the hydrosphere, and possible subsequent effects on human health. (Author) 37 refs.

  12. Aplicaciones de los minerales arcillosos de Cayo Guan, Cuba, como adsorbentes de metales pesados y materia prima cerámica

    Directory of Open Access Journals (Sweden)

    Fonseca, D.

    2012-10-01

    Guan, municipio de Moa, hay junto a las importantes explotaciones industriales de lateritas, minerales arcillosos cuya caractarización química, mineralógica y evolución de fases con la temperatura han sido objeto de estudio por estos autores en un anterior trabajo; entre las características físicas, químicas y mineralógicas del yacimiento destacan los altos contenidos de óxidos de hierro y aluminio, bajas concentraciones de SiO2 y óxidos alcalinos, y la caolinita como mineral más abundante, además de hematita, gibsita y goethita en forma de geles. Se pretende en esta investigación estudiar sus propiedades tecnológicas para dilucidar la posible aplicabilidad a estos recursos minerales en la fabricación de ladrillos, baldosas de pasta roja, gres rústico y para la inmovilización de metales pesados en efluentes acuosos. El estudio por microscopía óptica de calefacción de los minerales arcillosos, indica que son unos materiales refractarios cuyo reblandecimiento aparece después de los 1500 ºC. El diagrama de trabajabilidad de las diferentes arcillas y el cálculo de la plasticidad por el método de la cuchara de Casagrande presentan dentro de la zona favorable para la extrusión sólo a una de las muestras. Los diagramas de gresificación informan que es a partir de 1400 ºC cuando se consigue una capacidad de absorción de agua < 0,6 %. El diseño de un programa ha posibilitado el cálculo de múltiples composiciones de un gres porcelánico preparado a partir de dichas arcillas, modificadas con materias primas de bajo coste que facilitan la formación de fase vítrea (feldespato potásico y casco de vidrio y/o incrementan el contenido de sílice (arena y diatomea utilizada como filtros en la industria cervecera. Se presentan los resultados de una de ellas (60 % de mineral arcilloso, 30 % de feldespato potásico y 10 % de diatomea que calcinada a 1250 ºC con una velocidad de calentamiento de 15 ºC/min dio lugar a una absorción de agua

  13. VIOLENCIA FILIO-PARENTAL: PRINCIPALES CARACTERÍSTICAS, FACTORES DE RIESGO Y CLAVES PARA LA INTERVENCIÓN

    Directory of Open Access Journals (Sweden)

    M. Luisa Martínez

    2015-09-01

    Full Text Available La Violencia Filio-parental (en adelante VFP es un problema cada vez más evidente en los sistemas de protección social, sanitario y judicial que, sin embargo, sigue presentando lagunas respecto de sus principales características y las de sus implicados, factores predisponentes e intervenciones eficaces. Sin embargo, sí existe consenso respecto de sus devastadoras consecuencias. Esta revisión bibliográfica se centra en analizar la problemática de la VFP con el objeto de proporcionar datos que sirvan de herramienta para futuras investigaciones y propuestas de intervención. En particular, en el artículo se define la VFP y sus tipos, se ofrecen datos sobre prevalencia, así como sobre las principales características de hijos maltratadores y padres y madres maltratadas, se comentan los principales factores de riesgo individuales, familiares, escolares y comunitarios destacados hasta el momento, y se presentan las principales áreas de intervención con este colectivo.

  14. Victimización en la perspectiva internacional : Resultados principales de la ENICRIV y ENECRIS 2004-2005

    NARCIS (Netherlands)

    Dijk, J. van; Kesteren, J. van; Smit, P.

    2007-01-01

    Este reporte presenta los principales resultados de las encuestas que fueron realizades como parte del quinto levantamiento de la Encuesta Internacional sobre Criminalidad y Victimización (ENICRIV). Una gran parte de los datos provienen de la Encuesta Europea sobre Criminalidad y Seguridad

  15. Habilidad de cuidado de cuidadores familiares principales de pacientes con ACV. Cartagena (Colombia

    Directory of Open Access Journals (Sweden)

    Amparo Montalvo Prieto

    2010-01-01

    Full Text Available El accidente cerebrovascular (ACV es la enfermedad neurológica que más incapacidad e institucionalización origina. Su alta supervivencia no es pareja a una recuperación total, pues hasta el noventa por ciento sufre secuelas, lo cual genera una demanda de cuidados y la presencia de un cuidador para realizar las actividades básicas. Estos cuidadores están expuestos a padecer cambios en su vida que afectan sus diferentes roles, lo cual los convierte en una población vulnerable que requiere atención de los servicios de salud. Objetivo: Identificar las habilidades de cuidado de los cuidadores principales de los pacientes con secuelas de ACV en Cartagena. Método: Estudio descriptivo, realizado a 152 cuidadores de pacientes con secuelas de ACV en la ciudad de Cartagena. Se utilizaron dos instrumentos: Caracterización de los Cuidadores e Inventario de Habilidad de Cuidado, instrumento que mide la habilidad de cuidado en las dimensiones conocimiento, valor y paciencia. Resultados: Los cuidadores en su mayoría son mujeres en edad adulta, menores que el sujeto de cuidado, dedicadas al hogar, llevan más de 37 meses dedicados al cuidado, no son las únicas cuidadoras; primer grado de consanguinidad (51,3%, presentan habilidad de cuidado media. Las dimensiones de habilidad de cuidado, el conocimiento (75,7% y la paciencia (87,5% estuvieron en categoría alta y el valor en categoría alta (2,6%. Conclusiones: Los cuidadores de personas con ACV no cuentan con la habilidad necesaria para establecer la relación de cuidado, es necesario realizar intervenciones orientadas a disminuir los riegos del rol de cuidador.

  16. Cuantificación de minerales K, Ca, Mg y P en pulpa y pergamino de café (Coffea arabica L. var. Typica

    Directory of Open Access Journals (Sweden)

    Johanna Mendoza Abarca

    2010-01-01

    Full Text Available Se trabajó con muestras de café Coffea arabica L., variedad Typica de tres lugares en Ecuador: Palanda, Vilcabamba y El Pangui, seleccionados por su disponibilidad y condiciones geográficas. Se analizó potasio, calcio y magnesio por espectrofotometría de absorción atómica; y fósforo por espectrofotometría visible, utilizando en todos los casos la digestión ácida para la preparación de las muestras. Con el objetivo de mantener la trazabilidad de los residuos se realizó el beneficio húmedo del café. Los resultados obtenidos para la pulpa de café expresados en base seca fueron: K 3,1 ± 0,43 %; Ca 0,46 ± 0,06 %; Mg 0,14 ± 0,01 % y P 0,13 ± 0,01 %. Para pergamino de café: K 0,16 ± 0,02 %; Ca 0,14 ± 0,05 %; Mg 0,06 ± 0,01 % y P 0,02 ± 0,01 %. En adición, se determinaron los minerales en el grano de café. Con estos resultados podemos mencionar que la pulpa de café es una buena fuente de potasio (especialmente, magnesio y fósforo. El pergamino pudiera ser considerado como fuente de fósforo.

  17. Comparación de modelos de clasificación automática de patrones texturales de minerales presentes en los carbones colombianos

    Directory of Open Access Journals (Sweden)

    JAIME LÓPEZ CARVAJAL

    2005-01-01

    Full Text Available Esta investigación presenta algunos resultados obtenidos bajo diferentes modelos de clasificación de patrones texturales de minerales presentes en imágenes digitales. El conjunto de datos utilizado esta caracterizado por un tamaño pequeño y presencia de ruido. Los modelos implementados fueron el clasificador Bayesiano, red neuronal (2-5-1, maquina de soporte de vectores (SVM, árbol de decisión y 3-vecinos más cercanos. Los resultados obtenidos luego de la validación cruzada demostraron que el modelo Bayesiano (84% arrojo la mejor capacidad predictiva, debido principalmente a su robustez frente al ruido. La red neuronal (68% y la SVM (67% dieron resultados alentadores, que posiblemente puedan mejorarse al incrementar el tamaño del conjunto de datos; mientras el árbol de decisión (55% y el k-vecinos (54% no parecen ser adecuados para este problema, dado su sensibilidad al ruido.

  18. Suplemento de vitaminas y minerales durante el períodico de gestión Vitamins and minerals supplements during pregnancy

    Directory of Open Access Journals (Sweden)

    Emilio Alberto Restrepo Baena

    1993-03-01

    Full Text Available

    Se presenta una revisión de los conocimientos actuales sobre la necesidad de suplementar la dieta de la embarazada con las diferentes vitaminas y minerales y se resumen los componentes de la alimentación más ricos en cada uno de ellos. Se concluye que, con excepción del hierro y, en casos específicos, el ácido fólico no se justifican tales suplementos si la embarazada ingiere una dieta adecuada.

    The need for supplementing the diet during pregnancy with vitamins and minerals is reviewed. Their main alimentary sources are summarized. It is concluded that, with the exception of Iron and of folic acid in specific situations such supplements are usually not needed If the pregnant woman receives an adequate diet.

  19. Determinación del tamaño racional del bloque para la estimación de los recursos minerales en el yacimiento “Mariel”

    Directory of Open Access Journals (Sweden)

    Orestes Gómez-González

    2011-12-01

    Full Text Available La calidad de la estimación de recursos minerales es uno de los temas más importantes en la industria geológica-minera actual. El desarrollo de los sistemas automatizados en este campo ha permitido un incremento en la calidad de las estimaciones en diferentes tipos de yacimientos, pero aún existen elementos de carácter subjetivo que influyen directamente en la precisión y exactitud de los cálculos, uno de ellos es el tamaño del bloque de estimación. Para la selección de éste se han utilizado fundamentalmente criterios de carácter económico y minero. En este trabajo se demuestra la influencia del tamaño del bloque de estimación en la precisión y exactitud de los recursos estimados, utilizando procedimientos conjuntos de estimación y simulación geoestadística. El procedimiento se aplica en el yacimiento Mariel de materia prima para cemento y la metodología propuesta puede ser aplicable a otros casos de estudio.

  20. Cuantificación de minerales K, Ca, Mg y P en pulpa y pergamino de café (Coffea arabica L. var. Typica

    Directory of Open Access Journals (Sweden)

    Jorge Geovanny Figueroa Hurtado

    2010-12-01

    Full Text Available Se trabajó con muestras de café Coffea arabica L., variedad Typica de tres lugares en Ecuador: Palanda, Vilcabamba y El Pangui, seleccionados por su disponibilidad y condiciones geográficas. Se analizó potasio, calcio y magnesio por espectrofotometría de absorción atómica; y fósforo por espectrofotometría visible, utilizando en todos los casos la digestión ácida para la preparación de las muestras. Con el objetivo de mantener la trazabilidad de los residuos se realizó el beneficio húmedo del café. Los resultados obtenidos para la pulpa de café expresados en base seca fueron: K 3,1 ± 0,43 %; Ca 0,46 ± 0,06 %; Mg 0,14 ± 0,01 % y P 0,13 ± 0,01 %. Para pergamino de café: K 0,16 ± 0,02 %; Ca 0,14 ± 0,05 %; Mg 0,06 ± 0,01 % y P 0,02 ± 0,01 %. En adición, se determinaron los minerales en el grano de café. Con estos resultados podemos mencionar que la pulpa de café es una buena fuente de potasio (especialmente, magnesio y fósforo. El pergamino pudiera ser considerado como fuente de fósforo.

  1. Estudio de la granulación de la mezcla de minerales de hierro en el proceso de sinterización. I parte. Granulación

    Directory of Open Access Journals (Sweden)

    Formoso, Antonio

    2000-08-01

    Full Text Available The granulation process of the ore mixture is described and the fitness for granulation of several iron ores form part of the mixture is studied. With a good granulation and sintering maximum temperature control is possible to achieve the best sintered structure, forming by a hematite nucleous bonded by acicular ferrites. The industrial experience of several types of granulation is described.

    Se describe el proceso de granulación de la mezcla de mineral y se estudia la aptitud a la granulación de una serie de minerales de hierro que forman parte de la mezcla. Con una buena granulación y control de la temperatura máxima de sinterización, se puede conseguir la estructura óptima del sintetizado, formada por un núcleo de hematita rodeado por una red de ferritos aciculares. Se expone la práctica industrial de distintas formas de realizar la granulación.

  2. Caracterización mineralógica y geoquímica de minerales hidratados de ambientes subterráneos: implicaciones para la exploración planetaria

    Directory of Open Access Journals (Sweden)

    Gázquez, F.

    2014-12-01

    Full Text Available The recent discovery of hydrated sulfates on the Martian surface suggests that widespread wet conditions were present during its early geological history. Upon this discovery, a growing interest has emerged in the study of this group of minerals from terrestrial environments as potential Martian analogs. Here, we evaluate the potential of various analytical techniques involved in current and future mission to Mars for detecting hydrated minerals from caves and mines of Spain and the mining district of Iglesias-Carbonia (Sardinia, Italy. Minerals were analyzed by Raman spectroscopy, which will be included in the payload of the ESA’s 2018 ExoMars mission. On the other hand, IR spectroscopy, also included in the ExoMars mission, as well as LIBS spectroscopy and a combined XRD-XRF analyzer, both onboard the Curiosity rover of NASA’s MSL mission, were utilized. Hydrated sulfates (gypsum, epsomite, jarosite and glaucocerinite, silicates (hemimorphite and carbonates (hydrozincite and hydromagnesite were characterized. Most of these minerals have also been detected on the Martian surface. The mechanisms involved in the genesis of these minerals and the potential analogies with the minerogenesis on Mars are discussed. The Raman-LIBS combination appears to be the most powerful tool for detecting hydrated minerals in Martian conditions. This technology will probably be considered to be onboard of further planetary missions.El reciente descubrimiento de minerales hidratados sobre la superficie de Marte sugiere la presencia de importantes cantidades de agua líquida durante algunas etapas de su historia geológica. A raíz de este hallazgo, los estudios sobre minerales hidratados en ambientes terrestres como potenciales análogos marcianos han adquirido gran relevancia. En el presente trabajo se han estudiado las características mineralógicas y geoquímicas de minerales hidratados procedentes de varias cuevas y minas españolas y de la región minera

  3. Principales insectos plaga, invertebrados y vertebrados que atacan el cultivo del arroz en Ecuador

    Directory of Open Access Journals (Sweden)

    MSc. Irán Rodríguez Delgado

    2018-04-01

    Full Text Available El trabajo ofrece una revisión bibliográfica actualizada relacionada con la caracterización de los principales insectos plaga, invertebrados y vertebrados que pueden afectar al cultivo del arroz, así como los daños que ocasionan y medidas para su control en Ecuador. La mayor afectación en el cultivo del arroz es ocasionada por la sogata (Tagosodes orizicolus Muir., que provoca daños directos, producidos por la picadura al momento de alimentarse, o indirectos, al transmitir el virus de la hoja blanca del arroz (RHBV; la mosca minadora, la cual arriba a las zonas arroceras de manera inesperada y el mejor método para su control es el uso de insecticidas; la chinche vaneadora, la que se ha convertido en una plaga de alta importancia ya que puede generar pérdidas económicas de un 30 a 65% del valor total de la producción; el acaro blanco (Steneotarsonemus spinki que puede originar daños directos, debido a su alimentación e indirectos por la inyección de toxinas o la diseminación de organismos fitopatógenos como el hongo Sarocladium oryzae provocando la pudrición de la vaina; o puede encontrarse en asociación con la bacteria Burkholderia glumae (Añublo bacterial de la panícula del arroz, el caracol manzana que provoca daños significativos en arrozales bajo riego; la rata arrocera, que causa los daños al construir sus nidos con hojas y tallos de arroz por encima de la superficie de la lámina de agua; y las aves que constituyen una amenaza permanente al producir daños considerables en la fase de maduración y en el proceso industrial del arroz. Palabras clave: Insectos, vertebrados, invertebrados, arroz, producción.

  4. Principales marcadores moleculares utilizados para la identificación de Babesia bovis y Babesia bigemina

    Directory of Open Access Journals (Sweden)

    Sandra Ríos T.

    2011-05-01

    Full Text Available Este artículo describe los principales marcadores moleculares utilizados para la identificación de B. bovis y B. bigemina reportados en la literatura científica. Para ello se diseñó una revisión sistemática a partir de la aplicación de la estrategia metodológica PICO modificada con el objetivo de definir las secuencias nucleotídicas detectadas en los diferentes sitios geográficos y su utilidad diagnóstica. Se realizó una búsqueda avanzada con los términos “Babesia bovis” y “DNA” y “Babesia bigemina” y “DNA” en las bases de datos ScienceDirect, SpringerLink y PubMed que después de ser filtradas permitieron obtener un resultado total de 68 artículos originales. Tanto los artículos incluidos como los excluidos fueron almacenados en tablas, en las cuales se presenta la justificación de su condición dentro del estudio. A los 68 artículos seleccionados se les aplicó una evaluación con criterios de inclusión y exclusión previamente definidos, de este modo, 21 artículos originales cumplieron con los criterios de inclusión y se incluyeron en el estudio. Se describe la utilidad de los marcadores moleculares referenciados en la literatura científica desde 1995 hasta el 2010: la subunidad pequeña RNAr, el gen citocromo b, gen msa-1 and msa-2c, el gen Bv, el factor de elongación alfa (EF-1α, el gen de la beta-Tubulina, SBP 1-2-3, y los RAP; su aplicación diagnóstica y su utilización en los diferentes sitios geográficos. Los marcadores moleculares utilizados para la detección de las babesias bovinas varían dependiendo de la región geográfica, grado de conservación genética y resultados de estudios previos que concluyen su utilidad diagnóstica.

  5. Principales daños sanitarios y sociales relacionados con el consumo de alcohol

    Directory of Open Access Journals (Sweden)

    Ana Sarasa-Renedo

    2014-01-01

    Full Text Available El alcohol afecta al cerebro y a la mayoría de los órganos y sistemas y se relaciona con numerosos problemas sanitarios, incluyendo enfermedades mentales, neurológicas, digestivas, cardiovasculares, endocrinas y metabólicas, perinatales, cáncer, infecciones y lesiones intencionadas y no intencionadas. Los mecanismos fisiopatológicos aún no se comprenden bien, aunque se ha postulado toxicidad directa del etanol y de sus metabolitos, déficits nutricionales y absorción de endotoxinas microbianas intestinales, todo modulado por los patrones de consumo y factores genéticos y ambientales. A nivel individual no puede predecirse con precisión quién tendrá o no problemas. A nivel poblacional para muchos problemas, como varios tipos de cánceres, hepatopatías, lesiones y probablemente conductas de riesgo, como relaciones sexuales sin protección, se suele observar una relación dosis respuesta lineal o exponencial. Para otros, como mortalidad general en mayores de 45 años, enfermedades isquémicas o diabetes mellitus la relación es en forma de J. Su impacto sobre la carga global de enfermedad es enorme, incluso después de descontar los efectos beneficiosos sobre la enfermedad cardiovascular, con diferencias importantes según país, edad, género, posición socioeconómica y otros factores. Buena parte de los daños se relacionan con su capacidad para producir dependencia y con la intoxicación aguda. A menudo genera también consecuencias negativas para otras personas (violencia, incumplimiento de responsabilidades familiares o laborales, molestias que no suelen considerarse al evaluar la carga de enfermedad. El objetivo de este trabajo es describir los principales daños sociales y sanitarios relacionados con el consumo de alcohol y los mecanismos que los generan a partir de fuentes secundarias.

  6. Principales resultados del sistema cubano de farmacovigilancia en el año 200

    Directory of Open Access Journals (Sweden)

    Francisco Debesa García

    2003-08-01

    Full Text Available Se describe el funcionamiento y principales resultados del sistema cubano de farmacovigilancia durante el año 2001 en todos los niveles de salud del país. Durante 12 meses, los casos se identificaron mediante el sistema de notificación voluntaria de sospecha de reacciones adversas a medicamentos. Se recibieron en la Unidad Nacional Coordinadora de Farmacovigilancia 16 195 notificaciones de Reacciones Adversas Medicamentosas (RAM que contenían 33 601 sospechas de RAM, para una tasa de notificación de 1 447 reportes x 1 000 000 de habitantes, el 60,2 % de las RAM correspondió al sexo femenino y el 39,8 % al masculino. En cuanto al nivel de asistencia, la atención primaria es la que más notifica con 83,3 %, fueron resultados alentadores que en el año 2001 la relación de reacciones moderadas y graves respecto a leves (59,2 %/40,6 % continua favorable al incremento de notificaciones de mayor severidad. Se reportaron 33 reacciones con desenlace fatal, para un 0,2 %. Las notificaciones recibidas en nuestra unidad nos permitieron cuantificar y caracterizar las RAM, teniendo además un gran valor para generar alertas y vigilar la seguridad de los medicamentos que circulan en nuestro país.The functioning and main results of the Cuban Drug Surveillance System in the year 2001 at all the health care levels throughout the country are described. In that period, cases were identified by the Voluntary Notification of suspected adverse drug reaction System. The National Coordinating Unit of Drug Surveillance received 16 195 notes on Adverse Drug Reactions that included 33 601 suspected adverse drug reactions, for a notification rate of 1 447 reports per 1 000 000 pop.; 62% of adverse drug reactions were reported in females and 39,8% in males. Regarding the level of assistance, primary health care level is the one that presented more reports with 83,3% of the total amount. Results were encouraging in the year 2001 since the ratio of moderate and

  7. TSCA Chemical Substance Inventory

    Science.gov (United States)

    Section 8 (b) of the Toxic Substances Control Act (TSCA) requires EPA to compile, keep current, and publish a list of each chemical substance that is manufactured or processed in the United States for TSCA uses.

  8. Principales componentes del clima laboral en el servicio de urgencias de una organización sanitaria: un abordaje cualitativo

    Directory of Open Access Journals (Sweden)

    J. Antonio Lozano Lozano

    2013-12-01

    Full Text Available El presente trabajo ofrece un modelo estructural de los principales componentes del "clima laboral" a partir de una construcción de categorías realizadas mediante el registro de información no estructurada aportada por 7 informantes clave del servicio de urgencias de una organización sanitaria. Para el registro de la información se utilizaron entrevistas en profundidad. Con la intención de organizar y sistematizar la información, se realizó un análisis de contenido de la documentación aportada, transformándola a formato de texto siguiendo el método denominado "Teoría Fundamentada" (Strauss y Glaser, 1980. Como resultado, se obtuvo un modelo del concepto basado en 5 componentes principales: "productividad", "relación laboral", "trabajo individual", "satisfacción laboral" y "características del servicio". A diferencia de otros procedimientos de obtención de componentes principales de un concepto, éste permitió dar cuenta del proceso de construcción emergente de las distintas categorías para poder explicitar procesos de construcción del cuerpo substantivo del concepto.

  9. Efecto de las impurezas en las propiedades físicoquímicas de una solución de lixiviación de minerales de cobre

    Directory of Open Access Journals (Sweden)

    Patricio Navarro

    2016-01-01

    Full Text Available Se cuantificaron y analizaron las propiedades físicas y químicas de una solución de lixiviación de minerales de cobre con una elevada concentración de cloro, aluminio y magnesio. Las propiedades analizadas fueron densidad, viscosidad y oxígeno disuelto. También se evaluó el efecto de la viscosidad sobre el tiempo de separación de fases en extracción por solvente. Las concentraciones utilizadas de cloro fueron 20, 30 y 50 g/L; las de aluminio, 7, 15 y 23 g/L, y las de magnesio, de 6, 14 y 22 g/L. Las temperaturas ensayadas fueron 25, 35 y 45 °C. Los resultados obtenidos muestran que la presencia de impurezas produce un importante impacto en la viscosidad de la solución y solamente pequeños cambios en la densidad. El elemento que menos impacta en estas propiedades es el cloro, seguido del magnesio, y el que produjo mayor cambio fue el aluminio. El aumento de temperatura reduce el impacto de estos elementos. La presencia de impurezas disminuye la concentración de oxígeno disuelto. En extracción por solventes, un aumento en la viscosidad provoca tiempos más prolongados en la separación de fases.

  10. Experimental petrology for the thermobarometric determination of mineral paragenesis: the fluid inclusions; Petrologia experimental para la determinacion termobarometrica de paragenesis minerales: las inclusiones fluidas

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Partida, Eduardo; Torres Rodriguez, Vicente; Birkle, Peter [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1994-05-01

    There is a great number of phenomena in nature in which some fluid participates as the main component. Such is the case of oil deposits formation, of metallic minerals, geothermal systems, metamorphic and diagenetic deposits. The common denominator of all of them is that in some part of their stages important physico-chemical processes occurred in the related fluids, leaving evidence of such phenomena in the fluid inclusions. The Geothermal Department has petrologic vanguard tools for reservoir problems resolution, since it has laboratories for the study on fluid inclusions by means of the technique called cryoscopic-microthermometry that permits the definition of physico-chemical conditions of the brine that participated or participates in the hydrothermal systems formation. The method simultaneously permits to know the characteristics of the initial brine that participated in the interaction water-rock phenomenon, observe the boiling phenomena, and determine conditions of initial pressure in the reservoirs. [Espanol] Existe un gran numero de fenomenos en la naturaleza en los que participa algun fluido como componente principal. Tal es el caso de la formacion de yacimientos de petroleo, de minerales metalicos, de sistemas geotermicos, yacimientos metamorficos y diageneticos. El comun denominador de todos ellos es que en alguna de sus etapas ocurrieron procesos fisicoquimicos importantes en los fluidos relacionados, quedando evidencia de tales fenomenos en las inclusiones fluidas. El Departamento de Geotermia cuenta con herramientas petrologicas de vanguardia para la resolucion de problemas en yacimientos, ya que tiene laboratorios para el estudio de las inclusiones fluidas por medio de la tecnica denominada microtermometria-crioscopica que permite definir condiciones fisicoquimicas de la salmuera que participo o participa en la formacion de sistemas hidrotermales. El metodo permite simultaneamente conocer las caracteristicas de la salmuera inicial que participo en

  11. Impacto nutricio del consumo de una leche entera adicionada con vitaminas y minerales en niños Nutritional impact of a full strenght milk with added vitamins and minerals in children

    OpenAIRE

    Irene Maulen-Radovan; Sandra Villagómez; Esther Soler; Rolando Villicaña; Lizbeth Hernández-Ronquillo; Jorge L. Rosado

    1999-01-01

    OBJETIVO: Determinar el impacto nutricio del consumo de leche entera fortificada con vitaminas y minerales en niños. MATERIAL Y MÉTODOS: Se hizo un estudio prospectivo, longitudinal, en 227 niños de entre 8 a 60 meses de edad. Se ofreció a los menores 500 ml diarios de leche entera fortificada por 90 días. Se registró ingestión, aceptación, peso, talla, hemoglobina (Hb), hierro (Fe), vitamina B12 y folatos séricos. El análisis estadístico se realizó con medidas de tendencia central y dispersi...

  12. Adición de vitaminas y minerales a harinas de maíz y de trigo en México Vitamin and mineral addition to corn and wheat flours in Mexico

    OpenAIRE

    Jorge L. Rosado; Rafael Camacho-Solís; Héctor Bourges

    1999-01-01

    En México la deficiencia marginal de algunas vitaminas y minerales afecta la salud y la funcionalidad de un número elevado de mexicanos, por lo que la Secretaría de Salud ha iniciado un programa para promover la adición de nutrimentos a las harinas de trigo y de maíz que se procesan industrialmente. El presente documento expone las bases científicas y tecnológicas para dicha adición. El objetivo primordial es restaurar los nutrimentos que se pierden durante el proceso de obtención de las hari...

  13. Análisis estadístico multivariante de las principales enfermedades gastroéntericas en el cantón Guayaquil

    OpenAIRE

    Romero Saltos, Cristina Marisela; Ramirez Figueroa, John Alex

    2009-01-01

    La presente investigación desarrolla el Análisis Multivariado de las principales enfermedades gastroéntericas que afectan a la ciudad de Guayaquil. Consideramos que las principales enfermedades gastroéntericas son: Fiebre Tifoidea, Salmonelosis y Enfermedades Diarreicas Agudas. En el primer capítulo se enfoca la problemática de las enfermedades gastroéntericas en el Ecuador y en la ciudad de Guayaquil, de la misma manera se presenta la descripción de las principales enfermedades gastroént...

  14. Evaluación de minerales alumino silicatos de Norte de Santander para fabricar piezas cerámicas de gran formato

    OpenAIRE

    Sandra Milena Rozo-Rincón; Jorge Sánchez-Molina; John Freddy Gelves-Díaz

    2014-01-01

    Se dan a conocer los resultados de la influencia del feldespato al ser mezclado con arcilla del área metropolitana de Cúcuta (Norte de Santander, Colombia), en relación con las principales variables que son tenidas en cuenta a la hora de fabricar un producto cerámico tradicional de gran formato mediante técnica de conformado por extrusión. Los materiales empleados fueron arcillas provenientes de las formaciones León y Guayabo, y el feldespato del municipio de Sardinata, los cuales fueron estu...

  15. EL TURISMO SOLIDARIO COMO INSTRUMENTO DE DESARROLLO: UN ESTUDIO DE CASO PARA ANALIZAR LAS PRINCIPALES MOTIVACIONES DE LOS TURISTAS SOLIDARIOS

    Directory of Open Access Journals (Sweden)

    Laura Fuentes-Moraleda

    2016-01-01

    Full Text Available Este estudio se centra en el concepto y evolución del turismo solidario así como en las motivaciones del turista que lo realiza. Tras la revisión de la literatura y basado en un estudio cuantitativo de la cartera de clientes de una ONG española especializada en viajes solidarios, se concluye que la interactuación con otras culturas y el enriquecimiento personal son dos de las principales motivaciones de este tipo de viajero. Los resultados del estudio presentan algunas orientaciones para que las comunidades adapten su oferta actual hacia una mayor integración con el viajero.

  16. Parasitosis intestinales en Argentina: Principales agentes causales encontrados en la población y/o en el ambiente

    OpenAIRE

    Juarez, Maria Mercedes; Rajal, Verónica Beatriz

    2015-01-01

    Las parasitosis intestinales se encuentran ampliamente distribuidas en el mundo, con mayor prevalencia en los países en desarrollo. Principalmente afectan a los niños en los que además provocan disminución del desarrollo físico y mental; situación que puede potenciarse enormemente cuando se suma a un estado nutricional deficiente. La Organización Mundial de la Salud las considera una de las principales causas de morbilidad, estrechamente ligada a la pobreza y relacionada con inadecuada higien...

  17. Patrocinio deportivo en los principales equipos de fútbol de la Liga española

    OpenAIRE

    Trueba Gutiérrez, Manuel

    2016-01-01

    RESUMEN: El marketing es una función de la organización y un conjunto de procesos para crear, comunicar y entregar valor a los clientes, y para manejar las relaciones con estos últimos, de manera que beneficien a toda la organización”. (AMA, 1985) El objetivo principal de este trabajo es analizar y tratar todo aquello que rodea al mundo del Patrocinio en el fútbol. Concretamente, el valoraremos la notoriedad o importancia de los patrocinadores en los principales equipos de fútbol de la Li...

  18. Marco jurídico y principales instrumentos de la cooperación transfronteriza institucional en Europa

    OpenAIRE

    Medina García, Eusebio

    2017-01-01

    En este artículo realizamos un recorrido desde los orígenes de la «cooperación transfronteriza institucional» en Europa hasta la actual «cooperación territorial». Definimos y comparamos los conceptos de «cooperación institucional» y «cooperación tradicional” y auguramos un acercamiento entre ambas. Describimos el principal marco legal de la «cooperación transfronteriza institucional» y analizamos sus principales instrumentos, prestando una atención especial a la Eurorregión, a la Agrupación E...

  19. Burnout en cuidadores principales de pacientes con Alzheimer,el síndrome del asistente desasistido

    OpenAIRE

    Garcés de los Fayos Ruiz, Enrique Javier; Peinado Portero, Ana Isabel

    1998-01-01

    En este trabajo se describen los efectos emocionales que sufren los familiares que asumen el papel de cuidadores principales de enfermos de Alzheimer, y en especial el síndrome denominado Burnout. Este trastorno se manifiesta mediante un complejo síndrome afectivo y motivacional, que acaece en quienes desempeñan tareas de ayuda a los demás, caracterizado por la presencia de síntomas de agotamiento emocional, despersonalización en el trato e inadecuación con la ...

  20. Desempeño competitivo de los principales bloques exportadores en el mercado mundial de quesos y manteca

    OpenAIRE

    Depetris Guiguet, Edith; Rossini, Gustavo

    2007-01-01

    Dos de los principales productos lácteos comercializados en el mercado internacional son quesos y manteca, habiendo sido ambos objeto de fuerte protección en casi todos los países. Entre comienzos de la década del ’90 y mediados de la primera del nuevo milenio, hubo cambios importantes en el contexto que afectaron el comercio mundial de ambos, incluyendo la consolidación y creación de bloques de libre comercio y los resultados de las negociaciones multilaterales, con compromisos de mayor aper...

  1. Substance use - cocaine

    Science.gov (United States)

    Substance abuse - cocaine; Drug abuse - cocaine; Drug use - cocaine ... thinking clearly Mood and emotional problems, such as aggressive or violent behavior Restlessness and tremors Sleep problems ...

  2. Substance use - phencyclidine (PCP)

    Science.gov (United States)

    PCP; Substance abuse - phencyclidine; Drug abuse - phencyclidine; Drug use - phencyclidine ... a result, you may act strangely or become aggressive and violent. PCP's other harmful effects include: It ...

  3. Adición de vitaminas y minerales a harinas de maíz y de trigo en México

    Directory of Open Access Journals (Sweden)

    Rosado Jorge L.

    1999-01-01

    Full Text Available En México la deficiencia marginal de algunas vitaminas y minerales afecta la salud y la funcionalidad de un número elevado de mexicanos, por lo que la Secretaría de Salud ha iniciado un programa para promover la adición de nutrimentos a las harinas de trigo y de maíz que se procesan industrialmente. El presente documento expone las bases científicas y tecnológicas para dicha adición. El objetivo primordial es restaurar los nutrimentos que se pierden durante el proceso de obtención de las harinas y durante la fabricación de los alimentos a partir de las harinas; además, se adicionan aquellos nutrimentos cuya presencia es deficiente en una proporción importante de la población y cuya suplementación en la dieta ha demostrado ser benéfica en la salud y la funcionalidad de la población. En la definición de la fórmula para adicionar a las harinas de trigo y maíz se consideraron, además de los factores mencionados, los niveles de absorción de los diferentes nutrimentos, la interacción probable entre nutrimentos y un malgar muy amplio de seguridad, de manera que se eliminara cualquier riesgo de algún efecto adverso en la salud, aun en los niveles más altos de ingestión de los alimentos. Finalmente, se sugieren los compuestos más apropiados para la adición a las harinas considerando su reactividad y sus posibles efectos negativos en la estabilidad de las harinas, así como su biodisponibilidad, su disponibilidad en el mercado y su costo. Con lo anterior se recomienda la adición de 5 mg/kg de tiamina (mononitrato de tiamina, 3 mg/kg de riboflavina (hidroclorhidrato de riboflavina, 35 mg/kg de niacina (nicotinamida, 30 mg/kg de hierro (hierro reducido extrafino y 20 mg/kg de zinc (óxido de zinc para ambas harinas, así como 2 mg/kg y 0.5 mg/kg de ácido fólico para las harinas de trigo y maíz, respectivamente.

  4. Respuesta metalúrgica de fracciones finas de minerales sulfurados de cobre en un proceso combinado de flotación modificada y biolixiviación agitada

    Directory of Open Access Journals (Sweden)

    Ibáñez, J. P.

    2007-04-01

    Full Text Available The metallurgical behavior of fine fractions of copper sulfide minerals of Compañía Minera Quebrada Blanca S.A. was studied by concentration through flotation in aqueous media modified by alcohol followed by bioleaching of the concentrates. By using a 1 % v/v of methanol, the metallurgical recovery of copper reaches 88 %, while the iron recovery was 43 %, the weight recovery was 18%, which indicates a high selectivity. These concentrates were then bioleached with and without nutrient medium, reaching 80 % of copper recovery after 10 and 17 days, respectively. Then, it is possible to conclude that this concentration-bioleaching metallurgical process is a promising route for copper recovery from the fine fraction of sulfide minerals.

    Se estudió la respuesta metalúrgica de la fracción fina, 100 % -100 # ASTM, de un mineral sulfurado de cobre de la Compañía Minera Quebrada Blanca S.A., sometido a una etapa de concentración mediante flotación en medio acuoso modificado (FEMAM® con metanol y la posterior biolixiviación agitada de este concentrado. Al emplear un 1 % v/v de metanol se logran los mejores resultados: una recuperación metalúrgica de cobre y hierro de 88 y 43 %, respectivamente, y una recuperación en peso del 18 %. Lo cual indica una alta selectividad de este tipo de flotación para especies sulfuradas de cobre. El concentrado FEMAM® fue posteriormente sometido a una etapa de biolixiviación agitada en ausencia y presencia del medio nutriente 9 K, lográndose el 80 % de extracción de cobre a los 17 y 10 días, respectivamente. Esto permite concluir que una ruta de concentración-biolixiviación es una alternativa tecnológica apropiada para procesar la fracción fina de minerales sulfurados de cobre.

  5. Mejora de los procesos de beneficio y extracción de minerales auroargentíferos del asentamiento minero de San Pedro Frío, Colombia

    Directory of Open Access Journals (Sweden)

    Yáñez Traslaviña, J. J.

    2005-04-01

    Full Text Available The San Pedro Frio district mining, Colombia, is a rich region producing gold-silver ores. Nowadays, the extraction processes used are amalgamation, percolation cyanidation and precipitation with zinc wood. Due to the ignorance of the ore characteristics, gold and silver treatment processes are inadequate and not efficient In addition the inappropriate use of mercury and cyanide cause environmental contamination. In this research the ore characterization was carried out obtaining fundamental parameters for the technical selection of more efficient gold and silver extraction processes. Experimental work was addressed to the study of both processes the agitation cyanidation and the adsorption on activated carbon in pulp. As a final result proposed a flowsheet to improve the precious metals recovery and reduce the environment contamination.

    El asentamiento minero San Pedro Frío, Colombia, es una región rica en minerales auroargentíferos. Actualmente, los mineros de la región emplean procesos de tratamiento como amalgamación, cianuración por percolación y precipitación con viruta de zinc. Debido al desconocimiento de las características del mineral que allí se explota, los procesos de beneficio y tratamiento de oro y plata resultan inadecuados y poco eficientes, ocasionando, además, contaminación ambiental por el uso inapropiado del mercurio y cianuro. En este trabajo se realizó la caracterización del mineral obteniéndose parámetros fundamentales para la selección técnica de los procesos de extracción y recuperación de oro y de plata. El trabajo experimental se orientó al estudio de los procesos de cianuración por agitación y de adsorción con carbón activado en pulpa. Como resultado final, se presentó una propuesta de tratamiento para mejorar la recuperación de los metales preciosos y disminuir los niveles de contaminación ambiental

  6. Cálculo de ejes y momentos principales de inercia. // The calculation of main axes and inertia momentum.

    Directory of Open Access Journals (Sweden)

    L. O’connor Montero

    2001-07-01

    Full Text Available Se describen cálculos clásicos para determinar ejes y momentos principales de inercia de un cuerpo, y se demuestra que sepueden realizar cálculos con el mismo propósito mediante la aplicación del Cálculo Tensorial, la Teoría Espectral y elAlgebra Lineal. Esto permite justificar los términos del título del trabajo constituye una extensión del modelo tensorial a laestática, que en correspondencia con los elementos que lo definen y según analogías con otras aplicaciones a la mecánicadan lugar a introducir la noción de tensor de inercia de un cuerpo. Bien interpretado, el modelo puede contribuir a cambiosimportantes en la enseñanza del álgebra en la Ingeniería.Palabras claves: Tensor, cálculo tensorial, ejes y momentos principales de inercia, tensor de inercia.________________________________________________________________________________Abstract.The tensors calculation and the spectral theory are applied to modelling the inertia state (main axes and momentum ofinertia of a body. This makes possible to enrich static engineering calculations and to generalise tensorial models beyondthe materials resistance, fluids mechanic and the plastic deformation theory. Well interpretated, the model can lead toimportant changes in algebra teaching for mechanical engineers.Key words: Tension member, tension calculation, inertia main axes , principals inertia momentum, inertiatension member.

  7. Radioactive Substances Act 1948

    International Nuclear Information System (INIS)

    1948-01-01

    This Act regulates the use of radioactive substances and radiation producing devices in the United Kingdom. It provides for the control of import, export, sale, supply etc. of such substances and devices and lays down the safety regulations to be complied with when dealing with them. (NEA) [fr

  8. Transport of radioactive substances

    International Nuclear Information System (INIS)

    2014-12-01

    The report on the transport of radioactive substances covers the following topics: facts on radioactive materials transport, safety of the transport of radioactive substances, legal regulations and guidelines: a multiform but consistent system, transport of nuclear fuels, safety during the transport of nuclear fuel, future transport of spent fuel elements and high-level radioactive wastes in Germany.

  9. Pricing hazardous substance emissions

    Energy Technology Data Exchange (ETDEWEB)

    Staring, Knut; Vennemo, Haakon

    1998-12-31

    This report discusses pricing of emissions to air of several harmful substances. It combines ranking indices for environmentally harmful substances with economic valuation data to yield price estimates. The ranking methods are discussed and a relative index established. Given the relative ranking of the substances, they all become valued by assigning a value to one of them, the `anchor` substance, for which lead is selected. Valuations are provided for 19 hazardous substances that are often subject to environmental regulations. They include dioxins, TBT, etc. The study concludes with a discussion of other categories of substances as well as uncertainties and possible refinements. When the valuations are related to CO, NOx, SOx and PM 10, the index system undervalues these pollutants as compared to other studies. The scope is limited to the outdoor environment and does not include global warming and eutrophication. The indices are based on toxicity and so do not apply to CO{sub 2} or other substances that are biologically harmless. The index values are not necessarily valid for all countries and should be considered as preliminary. 18 refs., 6 tabs.

  10. Pricing hazardous substance emissions

    Energy Technology Data Exchange (ETDEWEB)

    Staring, Knut; Vennemo, Haakon

    1997-12-31

    This report discusses pricing of emissions to air of several harmful substances. It combines ranking indices for environmentally harmful substances with economic valuation data to yield price estimates. The ranking methods are discussed and a relative index established. Given the relative ranking of the substances, they all become valued by assigning a value to one of them, the `anchor` substance, for which lead is selected. Valuations are provided for 19 hazardous substances that are often subject to environmental regulations. They include dioxins, TBT, etc. The study concludes with a discussion of other categories of substances as well as uncertainties and possible refinements. When the valuations are related to CO, NOx, SOx and PM 10, the index system undervalues these pollutants as compared to other studies. The scope is limited to the outdoor environment and does not include global warming and eutrophication. The indices are based on toxicity and so do not apply to CO{sub 2} or other substances that are biologically harmless. The index values are not necessarily valid for all countries and should be considered as preliminary. 18 refs., 6 tabs.

  11. [Immunotoxicity and environmental substances].

    Science.gov (United States)

    Teshima, Reiko

    2014-01-01

    A well functioning immune system is essential in maintaining integrity of the organism, and malfunction may have severe health consequences. Environmental substances may pose direct toxicity to components of the immune system, often leading to immunosuppression and resulting reduced resistance to infections and tumors. Alternatively, such substances may be recognized by the immune system in a specific fashion, which may result in allergy and autoimmunity. A proper risk assessment of environmental substances in terms of immunotoxicity is necessary. In this manuscript, I reviewed recent three topics about immunotoxicity: (1) IPCS/WHO Guidance for immunotoxicity risk assessment for chemicals, (2) Intestinal immunotoxicity, and (3) Epicutaneous sensitization of food proteins.

  12. Encuesta Nacional de Factores de Riesgo 2005: resultados principales. Prevalencia de factores de riesgo de enfermedades cardiovasculares en la Argentina

    Directory of Open Access Journals (Sweden)

    Daniel Ferrante

    2007-01-01

    Full Text Available Hasta el momento no contábamos con estimaciones a nivel nacional de los principales factores de riesgo de morbimortalidad por enfermedades cardiovasculares que permitieran una estrategia de promoción y prevención primaria. En el marco del desarrollo de políticas de salud pública, el Ministerio de Salud de la Nación inició las actividades para la realización de la primera “Encuesta Nacional de Factores de Riesgo”. ObjetivosDescribir la prevalencia de los principales factores de riesgo de enfermedades cardiovasculares en la Argentina y su asociación con características sociodemográficas.Material y métodosDesde el 12 marzo y hasta el 17 de junio de 2005 se llevó a cabo la primera Encuesta Nacional de Factores de Riesgo. Se utilizó un cuestionario validado previamente para la Argentina, propuesto por la OPS y la OMS. La muestra fue probabilística, a nivel de viviendas, con representatividad nacional y provincial. Criterio de inclusión: población adulta (18 años y más. Se obtuvieron los principales indicadores de prevalencia de acuerdo con las recomendaciones de los CDC, se evaluaron asociaciones entre características sociodemográficas y se estimó la frecuencia de control de presión arterial y colesterol.ResultadosSe realizaron 41.392 encuestas, con una tasa de respuesta del 86,7%. Los principales indicadores a nivel nacional fueron: baja actividad física 46,2%, consumo de tabaco 33,4% 18 a 64 años y 29,7% en adultos, presión arterial elevada 34,4% (en personas que se controlaron,sobrepeso-obesidad 49,1%, bajo consumo de frutas y verduras 35,3%, diabetes 11,9%(en personas que se controlaron, colesterol elevado 27,8% (en personas que se controlaron,consumo de alcohol de riesgo 9,6%. Para casi todos los factores de riesgo evaluados se observó mayor prevalencia en la población de menores ingresos, con necesidades básicas insatisfechas y menor nivel educativo. Se observaron prevalencias significativas tambi

  13. Uranium Ore and Concentrate Sampling; Echantillonnage des Minerais et des Concentres d'Uranium; Otbor prob uranovoj rudy i kontsentratov; Muestreo de Minerales y Concentrados de Uranio

    Energy Technology Data Exchange (ETDEWEB)

    McGinley, F. E.; Brown, D. L.; Langridge, R. W. [United States Atomic Energy Commission, Grand Junction, CO (United States)

    1966-02-15

    dirigees par des exploitants sous contrat. Un lot moyen comprend environ 50 futs (de 210 litres) et pese environ 16 tonnes. Comme les caracteristiques physiques et chimiques de ces concentres varient considerablement d'un fut a l'autre, il est necessaire d'echantillonner chaque fut. Au cours de ces annees, on a eu recours a differents procedes d'echantillonnage - tubes, sondes ouvertes, sondes fermees ou ecoulement du minerai. Ce dernier procede est le plus precis a condition que l'on prenne les precautions requises pour prevenir les changements de poids resultant de l'exposition a l'atmosphere. Comme les concentres ont tendance a absorber l'humidite ambiante ou a perdre leur humidite selon les conditions atmospheriques auxquelles ils sont exposes, on a constamment mis au point des methodes speciales de sous-echantillonnage, de sechage et de preparation des echantillons en vue de rendre l'echantillonnage de tous les lots plus exact et plus precis. On a eu beaucoup recours a la statistique pour analyser et interpreter les mesures et les donnees pour l'evaluation des echantillonnages. (author) [Spanish] La oficina de Grand Junction de la Comision de Energia Atomica de los Estados Unidos ha tenido que adquirir grandes cantidades de uranio natural, tanto en forma de mineral como en forma de concentrado. Las tecnicas empleadas para el muestreo de minerales difieren necesariamente de las empleadas para los concentrados. Los autores de la memoria analizan las operaciones que integran los sistemas generales de medicion y muestreo de minerales y concentrados, prestando atencion especial a la exactitud y precision de cada una de ellas. Entre 1948 y 1964 se sacaron muestras de 58 millones de toneladas de mineral en unas 40 plantas de muestreo mecanico situadas en la parte occidental de los Estados Unidos. En todas estas plantas el mineral fue pesado, muestreado y analizado segun practicas aprobadas por la AEC de los Estados Unidos. Para las muestras se siguieron los principios

  14. Comparativa técnica y prospectiva de las principales plataformas MOOC de código abierto

    Directory of Open Access Journals (Sweden)

    Juanan Pereira

    2014-01-01

    Full Text Available El desarrollo de cursos abiertos masivos online (MOOCs es un fenómeno en pleno auge a nivel mundial. Todos estos cursos se asientan en plataformas tecnológicas cuyas características técnicas conviene tener en cuenta, más aún tratándose de desarrollos de código abierto. Por lo tanto, a la hora de hacer una elección, tan relevante o más que analizar las características funcionales de la plataforma, es analizar los aspectos más técnicos. En este sentido, son importantes en tanto detalles de carácter político: ¿a quién pertenece la propiedad intelectual de la plataforma? ¿bajo qué licencia se distribuyen?, como económicos: ¿ya existe lo que quiero hacer? ¿puedo basarme o reutilizar material existente?, y educativos: ¿cuáles son las principales funcionales técnicas? ¿cómo analizar y adecuar el itinerario formativo del alumnado en función del uso de la plataforma? ¿cómo dar soporte a miles de usuarios concurrentes de forma eficiente y eficaz?.Este trabajo tiene como objetivo contribuir con un análisis técnico comparativo de las principales plataformas MOOC disponibles bajo licencias abiertas, aportando claves que permitan, a los responsables de entidades educativas que vayan a desarrollar sus propios cursos masivos online, tomar decisiones sobre la plataforma a usar. Este trabajo de investigación incluye también un análisis prospectivo sobre las líneas de trabajo futuras en las que están trabajando las plataformas más activas.

  15. EFFECT OF SUBSTANCE (1)

    African Journals Online (AJOL)

    OF HEALTH OFFICER AND MEDICAL STUDENTS OF JIMMA. UNIVERSITY ... cannabis or marihuana and khat (2, 3). Reports showed that these substances ... mainly through cancer especially lung cancer, of which about 90% of cases are ...

  16. Toxic substances handbook

    Science.gov (United States)

    Junod, T. L.

    1979-01-01

    Handbook, published in conjunction with Toxic Substances Alert Program at NASA Lewis Research Center, profiles 187 toxic chemicals in their relatively pure states and include 27 known or suspected carcinogens.

  17. Toxic substances alert program

    Science.gov (United States)

    Junod, T. L.

    1978-01-01

    A toxicity profile is provided, of 187 toxic substances procured by NASA Lewis Research Center during a 3 1/2 year period, including 27 known or suspected carcinogens. The goal of the program is to assure that the center's health and safety personnel are aware of the procurement and use of toxic substances and to alert and inform the users of these materials as to the toxic characteristics and the control measures needed to ensure their safe use. The program also provides a continuing record of the toxic substances procured, who procured them, what other toxic substances the user has obtained in the past, and where similar materials have been used elsewhere at the center.

  18. Detergencia. Sus principales mecanismos

    Directory of Open Access Journals (Sweden)

    Gómez Herrera, Carlos

    1996-12-01

    Full Text Available Advances on research, technology and applications for detergent processes increase rapidly. They keep provoking, as during last decades, repercussions on several fields (domestic, industrial, sanitary, energetic, environmental, legislative. To control as much as possible these repercussions, it is necessary to assess the actual knowledge about detergency mechanisms. This informative article starts by reviewing the essential elements for detergent processes (substrate, soil, cleaning bath. Subsequently several physico-chemical key factors for effectiveness of the textile washing are discussed. These factors are: a removal of liquid oily soils (by rolling-up, or by spontaneous microemulsification; b separation of solid particles (by interfacial or electrostatic interactions; c antiredeposition effects (by solubilization, emulsification or suspension; d water hardness influence; e washing physical conditions (temperature, agitation, time. The article ends by establishing the necessity for maintaining close collaboration among experts on different fields to optimize both detergent processes and their repercussions.

    Los avances en investigación, tecnología y aplicaciones de las operaciones detersivas aumentan rápidamente. Estos siguen provocando, como durante las últimas décadas, repercusiones en muy diversos campos (domésticos, industriales, sanitarios, energéticos, medioambientales, legislativos. Para controlar en lo posible estas repercusiones, resulta necesario valorar los conocimientos actuales sobre los mecanismos de la detergencia. Este artículo de información comienza revisando los elementos esenciales de las operaciones detersivas (sustrato, suciedad, baño. A continuación discute varios factores químicofísicos clave para la eficacia en el lavado de artículos textiles. Estos factores son: a eliminación de suciedades oleosas líquidas (por «rolling-up», o por microemulsificación; b separación de partículas sólidas (por interacciones interfaciales y electrostáticas; c efectos de antirredeposición (por solubilización, emulsificación o suspensión; d influencia de la dureza del agua; y e condiciones físicas del lavado (temperatura, agitación, tiempo. El artículo termina estableciendo la necesidad de mantener una estrecha colaboración entre expertos de diferentes campos para optimizar las operaciones detersivas, así como las repercusiones de las mismas.

  19. El represamiento y aluvión del río Santa Cruz, Andes Principales (31°40'S), provincia de San Juan

    OpenAIRE

    Patricio E. D'odorico; Daniel J. Pérez; Nicolás Sequeira; Luis Fauqué

    2009-01-01

    En la región de los Andes Principales sanjuaninos, existe una alta concentración de deslizamientos, cuyos depósitos han originado represamientos naturales. El colapso de estos diques generados por movimientos de ladera es el proceso evolutivo más probable de estas geoformas. El análisis de imágenes satelitales y fotos aéreas permite reconstruir las características y el origen de los deslizamientos que formaron esos diques naturales. En esta región de los Andes Principales, el rápido levantami...

  20. Substance abuse in anaesthetists.

    Science.gov (United States)

    Garcia-Guasch, Roser; Roigé, Jaume; Padrós, Jaume

    2012-04-01

    Anaesthesiologists have a significantly higher frequency of substance abuse by a factor of nearly 3 when compared with other physicians. This is still a current problem that must be reviewed. Many hypotheses have been formulated to explain why anaesthesiologists appear to be more susceptible to substance abuse than other medical professionals (genetic differences in sensitivity to opioids, stress, the association between chemical dependence and other psychopathology or the second-hand exposure hypothesis). Environmental exposure and sensitization may be an important risk factor in physician addiction. There is a long debate about returning to work for an anaesthetist who has been depending on opioid drugs, and recent debates are discussed. Institutional efforts have been made in many countries and physician health programmes have been developed. As drug abuse among anaesthesiologists has continued, new studies have been conducted to know the theories about susceptibility. Written substance abuse policies and controls must be taken in place and in all countries.

  1. Detection of diffusible substances

    Energy Technology Data Exchange (ETDEWEB)

    Warembourg, M [Lille-1 Univ., 59 - Villeneuve-d' Ascq (France)

    1976-12-01

    The different steps of a radioautographic technique for the detection of diffusible substances are described. Using this radioautographic method, the topographic distribution of estradiol-concentrating neurons was studied in the nervous system and pituitary of the ovariectomized mouse and guinea-pig. A relatively good morphological preservation of structures can be ascertained on sections from unfixed, unembedded tissues prepared at low temperatures and kept-under relatively low humidity. The translocation or extraction of diffusible substances is avoided by directly mounting of frozen sections on dried photographic emulsion. Since no solvent is used, this technique excludes the major sources of diffusion artifacts and permits to be in favourable conditions for the localization of diffusible substances.

  2. Substance abuse and cancer.

    Science.gov (United States)

    Moussas, G I; Papadopoulou, A G

    2017-01-01

    Substance abuse is a health problem with serious psychological and psychiatric dimensions and multiple social and economic consequences. Cancer is a disease that threatens not only life and physical integrity but mental health as well. Oncology patients suffer from mental disorders in high rates, especially from depression and anxiety. The role of substance abuse in the pathogenesis of cancer is studied systematically, since there are research data supporting the mutagenic effects of certain substances. It has been supported that a possible dysregulation of the immune system is linked to the oncogenic processes induced by substances of abuse. Specifically, opioids are the first addictive substances that have been identified as oncogenic factors. However, conflicting results have been offered by experimental animal studies, which showed that opioids, such as morphine, depending on the dosage administered, may not only enhance the process of tumor growth, but also inhibit it. Additionally, research data indicate that the use of cannabis may be associated with cancer, either as an independent factor or in relation to other mutagenics, although it is not yet clear to which extent these effects may be connected to the disease, especially once the consumption of tobacco and alcohol by these patients are taken into account. However, it has been argued that certain cannabinoids may have biological -anticancer- activities which could be used therapeutically without being accompanied by the corresponding 9-tetrahydrocannabinol psychoactive effects. It is well known that alcohol is a risk factor for developing head and neck cancer, and epidemiological studies indicate that the higher the consumption of alcohol, the more mortality due to cancer increases. In addition, it is suggested that there is no safety level for alcohol consumption regarding the risk of developing cancer; that is even a minimum daily consumption is associated with the occurrence of certain types of cancer

  3. Evaluación de minerales alumino silicatos de Norte de Santander para fabricar piezas cerámicas de gran formato

    Directory of Open Access Journals (Sweden)

    Sandra Milena Rozo-Rincón

    2014-12-01

    Full Text Available Se dan a conocer los resultados de la influencia del feldespato al ser mezclado con arcilla del área metropolitana de Cúcuta (Norte de Santander, Colombia, en relación con las principales variables que son tenidas en cuenta a la hora de fabricar un producto cerámico tradicional de gran formato mediante técnica de conformado por extrusión. Los materiales empleados fueron arcillas provenientes de las formaciones León y Guayabo, y el feldespato del municipio de Sardinata, los cuales fueron estudiados mediante difracción de rayos (DRX y fluorescencia de rayos X (FRX. Las probetas conformadas se realizaron empleando proporciones de 100:0, 90:10 y 80:20 de arcilla-feldespato, respectivamente, y fueron sometidas a cocción a las temperaturas de 950°C-1000°C-1050°C. Se observó que la adición de feldespato mejoró de manera significativa las propiedades estudiadas para todas las arcillas empleadas en comparación con la mezcla patrón. Las muestras preparadas con arcilla Támesis presentaron el mejor desempeño.

  4. Hemorragia del postparto. Principales etiologías, su prevención, diagnóstico y tratamiento

    Directory of Open Access Journals (Sweden)

    DR. A. Aldo Solari

    2014-11-01

    Full Text Available La hemorragia del postparto es una de las principales emergencias obstétricas. La tasa de mortalidad materna por hemorragias oscila entre 30 y 50%. Los factores de riesgo más importantes son: edad materna avanzada y enfermedades crónicas. La etiología más frecuente es la Inercia Uterina, definida como la incapacidad del útero de retraerse luego del alumbramiento. Su prevención se basa en el manejo activo del trabajo de parto y el tratamiento va desde el uso de terapias farmacológicas con uterotónicos hasta la histerectomía de urgencia. El Acretismo es una inserción anormal de la placenta. Su diagnóstico se basa en el uso de Ecografía y Resonancia Nuclear Magnética y su tratamiento es el parto por cesárea con histerectomía. La radiología intervencionista ha contribuido a disminuir de forma importante la severidad de la hemorragia postparto. Es imprescindible contar con guías de acción protocolizadas para así evitar o disminuir su incidencia y magnitud.

  5. Componentes Principales (C.P. de los sistemas de calculo del IPC base 92 y sistema IPC base 2001

    Directory of Open Access Journals (Sweden)

    Julio Pallas González

    2002-01-01

    Full Text Available Nueve años después de que se adoptara un cambio de base en el cálculo del IPC para el Estado Español, asistimos a un cambio de sistema en el cálculo del mismo, naciendo el sistema de índices de precios, base 2001. A lo largo de este trabajo y utilizando el programa estadístico SPSS, se tratará de realizar un análisis multivariante, sobre las distintas variables que componen el IPC base 92, del estado español, y las del índice, atendiendo al nuevo sistema base 2001, que entró en vigor en enero de 2002. De todas las técnicas multivariantes susceptibles de ser aplicadas en este trabajo, se utilizaran el análisis de componentes principales y el análisis factorial, con el fin de obtener factores no observables que permitan explicar, perdiendo la mínima información, las variables originales que representan.

  6. Surgimiento, evolución y principales resultados del Centro Nacional Coordinador de Ensayos Clínicos

    Directory of Open Access Journals (Sweden)

    María Amparo Pascual López

    2011-03-01

    Full Text Available En la década de los 90, el desarrollo acelerado de la Industria Médico Farmacéutica cubana impuso la necesidad de crear estructuras que garantizaran la evaluación clínica de productos para su introducción a la práctica médica y posterior comercialización. Uno de los centros fundados para contribuir con estos fines fue el Centro Nacional Coordinador de Ensayos Clínicos. El presente trabajo recoge en síntesis las razones que motivaron la creación del centro y muestra, brevemente, su desarrollo organizacional por más de 17 años. Describe, además, los principales componentes del sistema de diseño y conducción de ensayos clínicos; así como los aportes más significativos de cada uno de ellos para el cumplimiento de sus objetivos como centro.

  7. ESTUDIO DE LA SIMILITUD DE LA RESPUESTA DE LOS PRINCIPALES MOTORES DE BÚSQUEDA EN LA WEB

    Directory of Open Access Journals (Sweden)

    José Vicente Rodríguez Cáceres

    2008-01-01

    Full Text Available El aumento de la información en la web y su empleo como fuente principal para la recuperación de información en Internet propicia que el uso de los sistemas de recuperación de información en la web (los motores de búsqueda, cobre mayor auge. Si bien estas herramientas realizan una labor encomiable, no resulta menos necesaria la tarea de evaluar su rendimiento y analizar la información que proporcionan. Nuestro estudio propone llevar a cabo un análisis de la similitud de los resultados ofrecidos por los principales motores de búsqueda. Para ello se ha construido un metabuscador que nos va a permitir realizar los experimentos de búsqueda y los cálculos de estos valores de una manera rápida e interactiva. Finalmente se intentará extraer un conjunto de conclusiones válidas de estos resultados, contrastándolas con datos obtenidos en otros trabajos y entre los mismos ofrecidos por nuestro experimento, que viene a demostrar el amplio grado de divergencia entre las respuestas de estos sistemas de recuperación de información, tratándose éste de un tema de relevante interés a la par que no definitivamente consensuado en su solución.

  8. Principales aportaciones de Ortega y Gasset a la Psicología social construccionista y post positivista.

    Directory of Open Access Journals (Sweden)

    Anastasio Ovejero

    2002-11-01

    Full Text Available "Principales aportaciones de Ortega y Gasset a la psicología social construccionista y post positivista" fue el título del seminario que Anastasio Ovejero impartió en el doctorado de Psicología Social de UAB en el mes de diciembre del 2001. Aquel día, en que comenzaban las temperaturas más bajas del invierno en Catalunya, acompañadas de una inusual nieve, realizamos la siguiente entrevista a un personaje que, en contraste, se mostró muy cálido y dispuesto a dialogar acerca de su trabajo en psicología social, sus acercamientos a la filosofía, y la conjugación de ambas disciplinas en el desarrollo teórico, político y práctico de la psicología. Y en donde además nos señaló las conexiones y puentes que entretejen las nuevas formas teóricas y algunas antiguas formas de pensar, tal como la que encontramos en una filosofía como la de Ortega y Gasset.

  9. Principales factores de riesgo asociados a las caídas en ancianos del área de salud Guanabo

    Directory of Open Access Journals (Sweden)

    Rosa Lidia Machado Cuétara

    2014-02-01

    Full Text Available Introducción: el envejecimiento provoca cambios en el adulto mayor, que condicionan su deterioro funcional y producen situaciones de incapacidad. Objetivo: determinar los factores de riesgo asociados a las caídas en los ancianos, según el grado de dependencia. Métodos: se realizó un estudio descriptivo y transversal de 57 pacientes, que recibieron atención ortopédica en el área de salud Guanabo del municipio Habana del Este de la provincia Ciudad de la Habana, desde enero hasta julio del 2011. Resultados: predominaron los gerontes de 80-89 años y las fracturas de caderas como las lesiones más frecuentes. Entre los principales factores de riesgo extrínsecos figuraron: mobiliario inestable, suelos irregulares e iluminación insuficiente; los intrínsecos fueron hipertensión arterial, alteraciones visuales y osteoarticulares. Según el índice de Bather y la escala de Lawton, la mayoría de los afectados mostraron un grado de dependencia leve para el primero y de 3-4 actividades instrumentales de la vida diaria, para el segundo. Conclusiones: el riesgo de caída fue mayor en las féminas y aumentó con la edad; influyeron factores intrínsecos y extrínsecos, asi como el grado de dependencia que poseían.

  10. Yellow substance (gelbstoff)

    International Nuclear Information System (INIS)

    Medina, A.

    1988-04-01

    The different values of the mean slope (S) of the absorption coefficient a(λ) of gelbstoff (yellow substance) for each region under the same hydrological conditions and the correlation between the quantity of absorption (CA) of gelbstoff and sea water parameter is discussed. 12 refs, 6 figs, 3 tabs

  11. Adolescent Substance Abuse.

    Science.gov (United States)

    Thorne, Craig R.; DeBlassie, Richard R.

    1985-01-01

    Cummings (1979), citing evidence from the National Institute of Drug Abuse, reports that one of every eleven adult Americans suffers from a severe addictive problem. Drug addiction is epidemic among teenagers; one of every six teenagers suffers from a severe addictive problem. This paper focuses on adolescent drug/substance abuse. (Author)

  12. Aversion substance(s) of the rat coagulating glands

    Science.gov (United States)

    Gawienowski, Anthony M.; Berry, Iver J.; Kennelly, James J.

    1982-01-01

    The aversive substance(s) present in adult male urine were not found in castrate rat urine. Removal of the coagulating glands also resulted in a loss of the aversion compounds. The aversion substances were restored to the urine after androgen treatment of the castrate rats.

  13. Cooperación judicial e integración subnacional chileno-argentina: principales logros y avances

    Directory of Open Access Journals (Sweden)

    Alejandro Sfeir Tonsic

    2014-12-01

    Full Text Available La cooperación judicial desarrollada entre diversos órganos de las provincias argentinas y regiones chilenas, al amparo del Tratado de Maipú de Integración y Cooperación de 2009 y de los Comités de Integración binacionales, ha experimentado sustantivos avances en los últimos años, los cuales se ven reflejados en las diversas actividades que se describen en el artículo, las cuales han sido coordinadas y lideradas por las cancillerías de ambos países. Por su parte, la cooperación judicial binacional se entrelaza con el concepto de integración subnacional tanto al permitir un amplio encuentro de altos funcionarios y profesionales interesados en avanzar en estas materias, como al hacer posible el estrechamiento de los vínculos ya existentes a ambos lados de la Cordillera de los Andes. Como fruto de las conversaciones mantenidas en Mendoza en el Comité “Paso Cristo Redentor” de 1 y 2 de septiembre de 2011 y de la organización del Primer Seminario Internacional de Cooperación Judicial Chile-Argentina, desarrollado el 29 y 30 de marzo de 2012, se lograron implementar nuevas Comisiones de Cooperación Judicial en los demás Comités de Integración, así como organizar nuevos seminarios sobre dicha temática, con el objeto de avanzar en el campo de la integración y la cooperación judicial. El objetivo del presente artículo es, precisamente, dar cuenta de los principales logros y avances en esa materia.

  14. Stroke And Substance Abuse

    OpenAIRE

    A Chitsaz

    2017-01-01

    Introduction: stroke in recreational substance users can be an indirect complication, like endocarditis and cardio embolism in parenteral drug users. With some drug like cocaine, stroke appear to be the result of a direct effect. In young subjects without other risk factors provide persuasive evidence for causality . OPIATES: Heroine is the most abused opiate drug, which is administered by injection, by snorting or by smoking. Stroke affects heroin users by diverse mechanisms,. Injec...

  15. Toxic Substances Control Act

    Energy Technology Data Exchange (ETDEWEB)

    1992-05-15

    This Reference Book contains a current copy of the Toxic Substances Control Act and those regulations that implement the statute and appear to be most relevant to DOE activities. The document is provided to DOE and contractor staff for informational purposes only and should not be interpreted as legal guidance. Questions concerning this Reference Book may be directed to Mark Petts, EH-231 (202/586-2609).

  16. Chemical Equilibrium and Mineral Saturation in Waters from Oil Wells of the Activo Luna Field, Tabasco, Mexico; Equilibrio quimico y grado de saturacion de minerales en aguas de pozos petroleros de Activo Luna, Tabasco, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Barragan R, Rosa Maria; Arellano G, Victor M.; Portugal M, Enrique; Torres R, Vicente [Instituto de Investigaciones Electricas (Mexico); Torres Alvarado, Ignacio [Universidad Nacional Autonoma de Mexico (Mexico); Ascencio C, Fernando; Martinez A; Ana E [Petroleos Mexicanos (Mexico)

    2001-09-01

    Chemical equilibrium of formation waters from seven oil wells of the Activo Luna field (Tabasco, Mexico) was modelled. Saturation indices of characteristic hydrothermal minerals were calculated at ambient and reservoir conditions in order to predict scaling potential of deep and surface installations. The salinity of waters was found to be in the range from 43,000 (well Escuintle 2) to 250,000 (well Lune 3B) mg/kg as total dissolved solids. The water samples were classified as sodium-chioride type. Ionic strength for the solutions was found to be between 0.75 and 6.5. Activity coefficients were estimated by virial (Pitzer equations) methods using the GEOCHEMIST WORKENCH (GWB) software. Minerals such as anhydrite, halite, alunite, fluorite and barite were found to be supersaturated at reservoir conditions. A solid scale sample obtained from well Luna-3B was analysed. Analysis indicate the presence of calcite, anhydrite, fluorite and sphalerite which suggest the occurrence of temperatures of at least 180 Celcius degrees with acidic conditions and high chemical corrosion potential. [Spanish] Se modelo el equilibrio quimico de aguas de formacion producidas por siete pozos petroleros pertenecientes al Activo Luna, en el estado de Tabasco, Mexico, se calcularon los indices de saturacion de minerales caracteristicos tanto en las condiciones ambiente como en las de yacimiento, con el proposito de apoyar el control de incrustaciones en las instalaciones superficiales y profundas. La salinidad de las salmueras se encontro en el rango de 43,000 (pozos Escuintle 2) a 250,000 (pozos Luna 3B) mg/kg de solidos disueltos totales y las muestras se clasificaron como del tipo clorurado-sodico. La fuerza ionica de las soluciones varia entre 0.75 y 6.5 molar, por lo que los coeficientes de actividad de la modelacion de equilibrio quimico se estimaron por metodos viriales empleando las ecuaciones de Pitzer mediante el programa GEOCHEMIST WORKBENCH (GWB). Minerales como anhidrita, halita

  17. Substance use in pregnancy.

    Science.gov (United States)

    Wong, Suzanne; Ordean, Alice; Kahan, Meldon

    2011-04-01

    To improve awareness and knowledge of problematic substance use in pregnancy and to provide evidence-based recommendations for the management of this challenging clinical issue for all health care providers. This guideline reviews the use of screening tools, general approach to care, and recommendations for clinical management of problematic substance use in pregnancy. Evidence-based recommendations for screening and management of problematic substance use during pregnancy and lactation. Medline, PubMed, CINAHL, and The Cochrane Library were searched for articles published from 1950 using the following key words: substance-related disorders, mass screening, pregnancy complications, pregnancy, prenatal care, cocaine, cannabis, methadone, opioid, tobacco, nicotine, solvents, hallucinogens, and amphetamines. Results were initially restricted to systematic reviews and randomized control trials/controlled clinical trials. A subsequent search for observational studies was also conducted because there are few RCTs in this field of study. Articles were restricted to human studies published in English. Additional articles were located by hand searching through article reference lists. Searches were updated on a regular basis and incorporated in the guideline up to December 2009. Grey (unpublished) literature was also identified through searching the websites of health technology assessment and health technology assessment-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies. The quality of evidence was rated using the criteria described in the Report of the Canadian Task Force on the Preventive Health Care. Recommendations for practice were ranked according to the method described in that report (Table 1). This guideline is intended to increase the knowledge and comfort level of health care providers caring for pregnant women who have substance use disorders. Improved access to

  18. Principales lesiones bucales y factores de riesgo presentes en población mayor de 60 años

    Directory of Open Access Journals (Sweden)

    Rosa María Gonzáles Ramos

    2010-03-01

    Full Text Available Se efectuó un estudio descriptivo en la población mayor de 60 años del área de salud de la Policlínica Moncada, que recibieron atención en la Facultad de Estomatología "Raúl González Sánchez", Ciudad de La Habana, durante el año 2006, para determinar los factores de riesgo asociados con la aparición de lesiones bucales, su distribución según edad y sexo, además de identificar el tipo de lesión y su localización anatómica. Se estudiaron 352 ancianos a los que se les aplicó una encuesta para identificar la presencia de factores de riesgo y se realizó un examen físico de la cavidad bucal y el cuello para detectar las lesiones y su localización. Como principales resultados se obtuvo que el 60,7 % de los ancianos presentaron factores de riesgo; los más frecuentes fueron: la ingestión de alimentos condimentados y calientes en un 83,4 %, el hábito de fumar en un 82,1 % seguido del uso de prótesis y el alcoholismo, ambos con 72,4 %. El sexo masculino fue el más afectado en un 58,2 %, el factor de riesgo que predominó fue la ingestión de alcohol en un 75,7 %. En las mujeres el uso de prótesis fue el factor de riesgo que predominó con un 73,3 %, seguido del hábito de fumar; la edad más afectada fue la de más de 80 años en un 41,7 %. El 48,5 % presentaban lesiones, el épulis fisurado fue el más representativo en un 39,1 %, la estomatitis subprotésica con un 35,6 %. La localización anatómica encontrada con mayor afectación fue el paladar duro, encía inferior y mucosa del carrillo. Se evidenció con estos resultados la falta de calidad de las actividades de educación para la salud, ya que predominaron estilos de vida perjudiciales a la salud.

  19. PRINCIPALES COMPETENCIAS QUE DEBE POSEER UN DIRECTOR DE PROYECTOS EN LA INDUSTRIA DE LA CONSTRUCCIÓN

    Directory of Open Access Journals (Sweden)

    R. F. Herrera

    2016-12-01

    Full Text Available El rol del director de proyectos es uno de los trabajos más desafiantes en cualquier organización, porque requiere una amplia comprensión sobre varias áreas que deben estar coordinadas y sobre las que se requieren habilidades interpersonales. El objetivo del trabajo es definir las principales competencias que deben poseer los directores de proyectos en la industria de la construcción, y además presentar cómo éstos podrían desarrollarlas. Para cumplir con éste, se realizó un análisis crítico que incluye diversos estudios de expertos, e instituciones dedicadas a esta área de la ingeniería. De este estudio se concluye que el director de proyectos debe poseer conocimientos, habilidades y actitudes para manejar los aspectos técnicos específicos, el alcance, los costos, los tiempos y la interrelación, alineada con los objetivos, del equipo de trabajo y de los stakeholders, entre otros. Todo ello en un ambiente cambiante, diverso y transversal, generador de incertidumbre y de conflictos a solucionar de forma competente. The role of the project manager is one of the most challenging jobs in any organization because it requires a broad understanding of several areas that need to be coordinated and require interpersonal skills. The objective of the work is to define the main competences that must be possessed by the project managers in the construction industry, and also to present how they could develop them. In order to comply with this, a critical analysis was carried out that includes several studies of experts, and institutions dedicated to this area of engineering. This study concludes that the project manager must have the knowledge, skills and attitudes to handle the specific technical aspects, scope, costs, timing and interrelationship, aligned with the objectives, teamwork and stakeholders, among others. All this in a changing, diverse and transversal environment, generating uncertainty and conflicts to be resolved competently

  20. Parasitosis intestinales en Argentina: principales agentes causales encontrados en la población y en el ambiente

    Directory of Open Access Journals (Sweden)

    María M Juárez

    Full Text Available Las parasitosis intestinales se encuentran ampliamente distribuidas en el mundo, con mayor prevalencia en los países en desarrollo. Principalmente afectan a los niños, en los que además provocan disminución del desarrollo físico y mental, situación que puede potenciarse enormemente cuando se suma a un estado nutricional deficiente. La Organización Mundial de la Salud las considera una de las principales causas de morbilidad, estrechamente ligada a la pobreza y relacionada con inadecuada higiene personal, incorrecta manipulación de los alimentos crudos, falta de servicios sanitarios, falta de provisión de agua potable y contaminación fecal del ambiente. Algunas enfermedades parasitarias se vinculan con condiciones de transmisión que existen universalmente, por lo que son cosmopolitas, mientras que otras tienen distribución geográfica variable. En los últimos años, debido a la globalización, el movimiento de personas de zonas endémicas a regiones no endémicas ha permitido la diseminación de ciertas parasitosis. Y aunque también influyen en la frecuencia de algunas de estas enfermedades las costumbres de los pueblos, las condiciones ambientales son un factor determinante para la supervivencia de los parásitos. En nuestro país, debido a la diversidad de suelos y condiciones climáticas que existen, es posible hallar variedad de agentes causales de estas parasitosis. El objetivo de este trabajo fue realizar una revisión bibliográfica de los agentes parasitarios causantes de enfermedades entéricas encontrados en la República Argentina, tanto en materia fecal de personas como en el ambiente, ya que la contaminación parasitaria de este último constituye un indicador directo del riesgo de infección por parásitos intestinales.

  1. Principales espèces médicinales utilisées en médecine vétérinaire ...

    African Journals Online (AJOL)

    Principales espèces médicinales utilisées en médecine vétérinaire au Bénin: disponibilité et caractéristiques dendrométriques. Irvine Yèïnou Minaflinou Sacca Sidi, Pascal Abiodoun Olounladé, Alain Yaoitcha, Vidjinnangni Fifamè Grâce Nadège Dedehou, Géorcelin Goué Alowanou, Erick Virgile Bertrand Azando, Mawulé ...

  2. Análisis de componentes principales funcionales en series de tiempo económicas (Analysis of principal functional components in economic time series

    Directory of Open Access Journals (Sweden)

    Cristina O. Chávez Chong

    2015-12-01

    Full Text Available Spanis abstract. El análisis de datos funcionales ha cobrado gran relevancia en los últimos años, convirtiéndose en un importante campo de investigación en la Estadística. El primer método considerado para procesar este tipo de datos fue el de las componentes principales. En este trabajo se considera la extensión del método de las componentes principales clásicas (ACP al caso funcional (ACPF, algunas propiedades interesantes que aparecen y otras que se conservan al realizar dicha extensión, así como su aplicación el procesamiento de datos reales económicos y una breve explicación de algunas bibliotecas que realizan el análisis de componentes principales funcionales. English abstract. The functional data analysis has gained relevance over the last years becoming an important statistics investigation field. The first method used to process this data type was the principal components analysis (PCA. In this paper, an extension of the classical principal components analysis (PCA to the functional method (FPCA is considered, as well as some interesting properties that appear and others that remain with it. Furthermore, its application in the processing of real economic data and some previous work that analyze functional principal components are explained.

  3. Substance abuse and child maltreatment.

    Science.gov (United States)

    Wells, Kathryn

    2009-04-01

    Pediatricians and other medical providers caring for children need to be aware of the dynamics in the significant relationship between substance abuse and child maltreatment. A caregiver's use and abuse of alcohol, marijuana, heroin, cocaine, methamphetamine, and other drugs place the child at risk in multiple ways. Members of the medical community need to understand these risks because the medical community plays a unique and important role in identifying and caring for these children. Substance abuse includes the abuse of legal drugs as well as the use of illegal drugs. The abuse of legal substances may be just as detrimental to parental functioning as abuse of illicit substances. Many substance abusers are also polysubstance users and the compounded effect of the abuse of multiple substances may be difficult to measure. Often other interrelated social features, such as untreated mental illness, trauma history, and domestic violence, affect these families.

  4. Radioactive substance solidifying device

    International Nuclear Information System (INIS)

    Sakoda, Kotaro.

    1979-01-01

    Purpose: To easily solidify radioactive substances adhering to the surfaces of solid wastes without scattering in the circumference by paints, and further to reduce surface contamination concentrations. Constitution: Solid wastes are placed on a hanging plate, and dipped in paints within a paint dipping treatment tank installed at the lower part of a treatment tank by means of a monorail hoist, and the surfaces of said solid wastes are coated with paints, thereby to solidify the radioactivity on the surfaces of the solid wastes. After dipping, the solid wastes are suspended up to a paint spraying tank to dry the paints. After drying, non-contaminated paints are atomized to apply through an atomizing tube onto the solid wastes. After drying the atomized paints, the solid wastes are carried outside the treatment tank by means of the monorail hoist. (Yoshino, Y.)

  5. Substance Use and Mental Health

    Science.gov (United States)

    ... and Alcohol Tobacco Learn More Substance Use and Mental Health Drugs and Alcohol Did you know that addiction ... Plus – also en Español Treatment Substance Abuse and Mental Health Administration (SAMHSA): SAMHSA’s National Helpline: 1-800-662- ...

  6. Estructura salarial y segmentación en el mercado laboral de Colombia: un análisis de las siete principales ciudades, 2001-2005

    OpenAIRE

    Mesa, Diana Carolina; Garcia-Suaza, Andres; Roa, Mónica

    2015-01-01

    Este documento se concentra en el estudio de las diferencias salariales mediante la comparación de las distribuciones de los salarios para las siete principales ciudades colombianas en el periodo 2001-2005 con datos de la Encuesta Continua de Hogares. Se detectan diferencias significativas que se explican a la luz de la teoría del capital humano y de segmentación laboral; mediante la estimación de ecuaciones de salarios a partir de las características socioeconómicas d...

  7. Patrones Presupuestarios de Gasto de las CCAA (2007): Análisis de Componentes Principales y Análisis de Clasificación

    OpenAIRE

    Alonso Sanz, Ixone

    2008-01-01

    En este trabajo se realizan dos estudios sucesivos para identificar tanto la diversidad de pautas presupuestarias de gasto autonómico como posibles patrones comunes, utilizando los presupuestos de 2007. Así, tras un primer análisis univariante, el núcleo de este artículo lo constituye un estudio multivariante de la distribución de las diferentes partidas presupuestarias en las distintas CCAA, empleando dos técnicas estadísticas: el Análisis de Componentes Principales (ACP) y el Análisis de Cl...

  8. Integración de las principales teorías del aprendizaje, y análisis y crítica de los autores estudiados

    OpenAIRE

    Mayorga Muñoz, Esteban; Corporación Universitaria Adventista Cra. 84#33AA-1 Medellín, Colombia, South America A.A. 877. Tel. 2508328; Ruiz López, José Jesús; González Arjona, Aura Graciela

    2017-01-01

    El objetivo de la presente actividad colaborativa es integrar las principales teorías del aprendizaje, analizando y criticando a los autores estudiados. Es una actividad colaborativa. Una vez leídos los documentos asignados, de analizarlos y de realizar búsquedas paralelas que aportaron a los contenidos, se seleccionaron dos de los autores de las teorías del aprendizaje: uno de lospropuestos en el cognitivismo, y uno de los propuestos en el constructivismo. Se reflexionó y centró la atención ...

  9. Luis de León (1527-1591 y su teoría de la justicia: aspectos principales de su doctrina

    Directory of Open Access Journals (Sweden)

    Sebastián Contreras

    2014-04-01

    Full Text Available Las investigaciones sobre Luis de León se han centrado, sobre todo, en su mística, narrativa y teoría literaria. En este trabajo, el autor intenta desarrollar los principales aspectos de su teoría jurídica. Al igual que otros grandes teólogos de la Escuela de Salamanca, también León ha estudiado el problema de la naturaleza de la ley humana y su vinculación con el derecho natural. Éste es, justamente, el tema del siguiente trabajo.

  10. Análisis de los principales sistemas de gestión de bases de datos ante ataques básicos

    OpenAIRE

    Armendariz Perez, Iñigo

    2016-01-01

    La información más sensible de prácticamente la totalidad de las empresas se almacena en sistemas gestores de bases de datos. Estos gestores pueden ser vulnerables a ataques externos, internos o a errores humanos y la información puede verse comprometida y accedida por personas no autorizadas. Una de las principales tareas del análisis forense es poder realizar un estudio de todo tipo de evidencia digital que esté involucrada en un incidente para que sea admisible en un proceso judicial. ...

  11. Plantas transgénicas: una revisión de los principales cultivos básicos en México

    OpenAIRE

    Paulina Rodríguez R.; Orfil González R.

    2007-01-01

    Los cultivos básicos principales en México son el maíz, la soya, el algodón, de los cuales se han investigado y desarrollado muchas variedades genéticamente modificadas. La aplicación de la genética es un tema muy controvertido. De momento, un aspecto fundamental es la apertura a la información de todo lo relacionado con los cultivos transgénicos para los clientes y consumidores finales. En México, el organismo encargado de la bioseguridad es CIBIOGEM, cuya función primordial es v...

  12. Mineralogía y reología de suspensiones minerales del proceso de lixiviación ácida a presión en Moa, Cuba

    Directory of Open Access Journals (Sweden)

    Rômulo Simões Angélica

    2010-03-01

    Full Text Available Se estudiaron muestras de laterita ferruginosa, cieno carbonatado, yeso y sulfuro de Ni+Co, asociadas al proceso de lixiviación ácida a presión (LAP para la extracción de sulfuros de Ni y Co, con el propósito de caracterizarlas mineralógica y reológicamente. Se emplearon técnicas de Difracción de Rayos-X, Análisis Térmico Diferencial, Espectroscopía Infrarrojo y Fluorescencia de Rayos-X. Los resultados evidenciaron que la laterita es una mezcla de minerales de hierro, donde la goethita es la fase mineralógica principal, con maghemita, hematita, gibbsita y serpentina como secundarias. El cieno es carbonatado, en forma de calcita y aragonito; el material de yeso se identifica como bassanita y el sulfuro de Ni + Co está constituido básicamente por millerita. La laterita, el cieno y el yeso están formados fundamentalmente por partículas finas (menores de 0,045 mm, lo que explica sus comportamientos reológicos, ajustables al modelo de Bulkley – Herschel. Por el contrario, el sulfuro de Ni + Co tiene una distribución de tamaño próxima a un material monodisperso, ajustándose bien al modelo de Newton. El modelo de érez describe adecuadamente la distribución de tamaño acumulativa de las partículas las lateritas, del cieno carbonatado y del yeso.

  13. Radioiodination of humic substances

    Energy Technology Data Exchange (ETDEWEB)

    Franke, K.; Kupsch, H. [Inst. of Interdisciplinary Isotope Research, Leipzig (Germany)

    2010-07-01

    The known IODO-GEN trademark -method was adapted for radiolabeling of humic and fulvic acids with {sup 131}I. The water insoluble oxidizing agent 1,3,4,6tetrachloro-3{alpha},6{alpha}-diphenylglycoluril (IODO-GEN trademark) forms an iodous ion species (I{sup +}), which undergoes an electrophilic I/H-substitution on aromatic moieties of the humic and fulvic acids. This method offers mild conditions with a lesser extent of oxidative alterations of the target molecule, accompanied by an easy handling due to the virtual water-insolubility of the oxidizing agent. The method was optimized and different techniques were tested for the purification of the radioiodinated humic material. The yield of the labeling procedure varies between 45 and 75% depending on the provenance of the humic material and the applied purification method. A specific activity up to 40 MBq/mg was achieved. Furthermore, the known inherent photo-susceptibility of the iodinated humic substance and the influence of reducing agents were verified. An additional release of {sup 131}I up to 20% and up to 35%, respectively were observed. (orig.)

  14. Distillation of bituminous substances

    Energy Technology Data Exchange (ETDEWEB)

    du Buisson, M A.B.B.

    1845-06-23

    New and improved methods are described for the distillation of bituminous schistus and other bituminous substances, as well as for the purification, rectification, and preparation necessary for the employment of the productions obtained by such distillation for various useful purposes. This invention consists, first, in the arrangement and construction of furnace or apparatus for the distillation of schistus, and (any) other bituminous rocks. This furnace is made of circular brick-work, and is provided with the requisite number of fires placed round the circumference. The retort is of a conical or funnel shape, and when ready for use, has the appearance of one inverted cone being placed within a larger cone, in such a manner as to leave a space between the two cones for the reception of the schistus. Both cones are capable of being closed at their apexes, and their mouths, which are placed upwards, are connected together, and hermetically closed by a flat ring. The flame draft is caused to impinge against the lower portion of the outer cone and ascending, turns over the upper edge and descends within the inner cone to the mouth of the chimney, which is placed in the interior, and as low as may be convenient. A third cone is so placed within the inner cone as to cause the flame draft, in its descent, to bind against the surface of the retort.

  15. A method and apparatus for preparing the storage of noxious substances, in particular radioactive substances

    International Nuclear Information System (INIS)

    1974-01-01

    The invention relates to the storage of radioactive substances. It deals with a method for storing a substance, in particular a noxious or radioactive substance, comprising trapping said substance in a solid substance by bombarding said solid substance with ions of the above substance, so that the latter reaches a certain concentration level in the solid substance. This is applicable to the storage of radioactive wastes [fr

  16. Alexithymia in Egyptian Substance Abusers.

    Science.gov (United States)

    El Rasheed, Amany Haroun

    2001-03-01

    Alexithymia is thought of as a trait that predisposes to drug abuse. Moreover, it is suggested to be related to type of the substance abused, with the worst-case scenario including a worse prognosis as well as tendency to relapse or even not to seek treatment at all. To address this important subject in Egyptian patients, a sample of 200 Egyptian substance abusers was randomly selected from inpatients in the Institute of Psychiatry, Ain Shams University, Egypt. The study also included 200 group-matched controls. DSM-IV criteria were used for assessment of substance use disorders, and toxicologic urine analysis was used to confirm the substances of abuse. Toronto Alexithymia Scale (TAS)-Arabic version was used for assessment of alexithymia. It was found that alexithymia was significantly more prevalent in the substance use disorders group as compared to healthy controls. It was also found that among the substance use disorders group, alexithymics reported more polysubstance abuse, more opiate use (other than heroin IV), lower numbers of hospitalizations, lower numbers of reported relapses, and a lower tendency to relapse as a result of internal cues compared to patients without alexithymia. Statistically significant associations were also found between alexithymia and more benzodiazepine abuse and nonpersistence in treatment. The results suggest that alexithymia should be targeted in a treatment setting for substance use disorders.

  17. Impacto de las buenas prácticas de gobierno corporativo en la generación de valor financiero de las empresas de explotación de minerales metálicos y de carbón en Colombia

    OpenAIRE

    Bravo, Leonardo; Ortiz, Fabiano; Tramelli, Maria Jose; Velásquez, Luísa Fernanda

    2017-01-01

    En este trabajo se presentan los resultados de un estudio descriptivo, cuyo objetivo fue determinar el impacto de las buenas prácticas de gobierno corporativo en la generación de valor financiero, a partir de una muestra de 11 empresas de explotación de minerales metálicos y de carbón en Colombia. Se diseñó un cuestionario argumentado a partir de un constructo literario y sujeto a un efecto cuantificable. Los resultados presumen el impacto que tiene el Gobierno Corporativo sobr...

  18. Definition of Substance and Non-substance Addiction.

    Science.gov (United States)

    Zou, Zhiling; Wang, Huijun; d'Oleire Uquillas, Federico; Wang, Xiaomei; Ding, Jianrui; Chen, Hong

    2017-01-01

    Substance addiction (or drug addiction) is a neuropsychiatric disorder characterized by a recurring desire to continue taking the drug despite harmful consequences. Non-substance addiction (or behavioral addiction) covers pathological gambling, food addiction, internet addiction, and mobile phone addiction. Their definition is similar to drug addiction but they differ from each other in specific domains. This review aims to provide a brief overview of past and current definitions of substance and non-substance addiction, and also touches on the topic of diagnosing drug addiction and non-drug addiction, ultimately aiming to further the understanding of the key concepts needed for a foundation to study the biological and psychological underpinnings of addiction disorders.

  19. El elector colombiano. Una aproximación al perfil del votante de los principales partidos en elecciones presidenciales, 2002-2010

    Directory of Open Access Journals (Sweden)

    Carlos Enrique Guzmán M.

    2015-01-01

    Full Text Available En el estudio del comportamiento electoral, a pesar de que las teorías sociológica, partidista y de elección racional continúan aplicándose vigorosamente para analizarlo, la respuesta al interrogante sobre ¿cuáles son los factores que predominan en la toma de la decisión del voto? no alcanzan, aún, una respuesta que logre el consenso académico. Así, este trabajo pretende identificar el perfil del votante colombiano en las elecciones presidenciales de 2002, 2006 y 2010 a partir de las semejanzas y diferencias de estos en términos de sofisticación política, orientación político-partidista y características sociodemográficas. El análisis estadístico se realiza con datos de la encuesta LAPOP, y se centra en los votantes de los partidos Liberal, Polo Democrático y Partido de la Unidad Nacional. En la primera parte del documento se plantean los principales aspectos teóricos que guían la investigación. Luego se muestran los rasgos principales del contexto en el que se desarrollaron los tres procesos electorales. Finalmente, se presentan los resultados de los análisis así como algunas ideas a modo de conclusión.

  20. Stroke And Substance Abuse

    Directory of Open Access Journals (Sweden)

    A Chitsaz

    2017-02-01

    Full Text Available Introduction: stroke in recreational substance users can be an indirect complication, like endocarditis and cardio embolism in parenteral drug users. With some drug like cocaine, stroke appear to be the result of a direct effect. In young subjects without other risk factors provide persuasive evidence for causality . OPIATES: Heroine is the most abused opiate drug, which is administered by injection, by snorting or by smoking. Stroke affects heroin users by diverse mechanisms,. Injectors are at risk of infections endocarditis, which carries risk for both ischemic and hemorrhagic stroke. Cerebral or subarachnoid hemorrhage usually occurs after rupture of a septic (mycotic aneurysm. Heroine users can are also at risk for hemorrhagic stroke secondary to liver failure with deranged clotting and to heroin nephropathy with uremia or malignant hypertension. In some heroin users the drug it self is directly causal due to vasculitis, hypersensitivity and immunologic changes. Embolization of foreign material to brain due to mixed of heroine with quinine can cause cerebral embolism. AMPHETAMINE AND other psychostimulants: In abuser of amphetamine hemorrhagic stroke can occur, oral, intravenous, nasal, and inhalational routes of administration have been reported. Most were chronic user, but in several patients, stroke followed a first exposure. Some of amphetamine induced intracranial hemorrhages are secondary to acute hypertension, some to cerebral vacuities, and some to a combination of two. Decongestants and diet pills: Phenylpropanolamine (PPA, an amphetamine – like drug, in decongestants and diet pills, induce acute hypertension, sever headache, psychiatric symptoms, seizures and hemorrhagic stroke. Ephedrine and pseudo ephedrine are present in decongestants and bronchodilators and induce headache, tachyarrhythmia, hypertensive emergency, and hemorrhagic and occlusive stroke. Ecstasy, 3,4 Methylenedioxymethamphetamin (MDMA with amphetamine like can

  1. Ozone-depleting Substances (ODS)

    Data.gov (United States)

    U.S. Environmental Protection Agency — This site includes all of the ozone-depleting substances (ODS) recognized by the Montreal Protocol. The data include ozone depletion potentials (ODP), global warming...

  2. Dermal uptake of petroleum substances

    NARCIS (Netherlands)

    Jakasa, Ivone; Kezic, Sanja; Boogaard, Peter J.

    2015-01-01

    Petroleum products are complex substances comprising varying amounts of linear and branched alkanes, alkenes, cycloalkanes, and aromatics which may penetrate the skin at different rates. For proper interpretation of toxic hazard data, understanding their percutaneous absorption is of paramount

  3. Suministro de las principales fuentes de energía, proteína y grasa en México, 1961–2010

    Directory of Open Access Journals (Sweden)

    Carlos Bruno-Fiscal

    2016-12-01

    Full Text Available Introducción: El conocimiento relacionado con la disponibilidad de los principales grupos de alimentos y sus aportes de energía, proteína y grasa, es de vital importancia por parte de entes gubernamentales y privados, con el fin de diagnosticar el potencial alimenticio de una región. Material y Métodos: Se utilizó análisis multivariado de la varianza (MANOVA con contraste canónico de tipo ortogonal, análisis de componentes principales, análisis descriptivo exploratorio de tipo unidimensional y análisis Biplot, donde se tuvo en cuenta una base de datos proveniente de la FAO relacionada al suministro medio disponible de energía, proteína y grasa por persona/día de los principales grupos de alimentos en el período comprendido de 1961 a 2010 en México. Dichos datos representan únicamente el suministro medio disponible para la población total y no indican necesariamente consumo real. Resultados: Durante el período de análisis el suministro de carne de ave fue el de mayor aumento, pasando de 10,4g/persona/día a 71,2g/persona/día. Caso contrario al maíz y el frijol, los cuales tuvieron una disminución de 1% y 49% respectivamente. El mayor suministro de energía y proteína lo aportó la leche con 130kcal/persona/día y 7,5g/persona/día de proteína. El mayor aporte de grasa se dio por parte de la carne de cerdo, con 10,8g/persona/día. Conclusiones: Si bien se nota un crecimiento de suministro de vegetales, frutas y hortalizas, este tiene una proporción menor al de la carne, por lo que se debe reorganizar la dieta de los mexicanos por una que contenga aportaciones óptimas para una dieta equilibrada.

  4. Impacto nutricio del consumo de una leche entera adicionada con vitaminas y minerales en niños Nutritional impact of a full strenght milk with added vitamins and minerals in children

    Directory of Open Access Journals (Sweden)

    Irene Maulen-Radovan

    1999-10-01

    Full Text Available OBJETIVO: Determinar el impacto nutricio del consumo de leche entera fortificada con vitaminas y minerales en niños. MATERIAL Y MÉTODOS: Se hizo un estudio prospectivo, longitudinal, en 227 niños de entre 8 a 60 meses de edad. Se ofreció a los menores 500 ml diarios de leche entera fortificada por 90 días. Se registró ingestión, aceptación, peso, talla, hemoglobina (Hb, hierro (Fe, vitamina B12 y folatos séricos. El análisis estadístico se realizó con medidas de tendencia central y dispersión en variables dimensionales utilizando prueba t de Student para comparación de promedios y ji² para variables nominales. RESULTADOS: Al inicio de la suplementación 45 niños estaban desnutridos, y 36, anémicos. Al final de la misma estas cifras disminuyeron: 35 desnutridos (pOBJECTIVE: To evaluate the nutritional impact of the ingestion of a fortified whole milk in children. MATERIAL AND METHODS: Prospective, longitudinal assay in 227 children aged 8-60 months. Intervention: Daily consumption of 500 ml of fortified milk during 90 days. We registered milk acceptance and assessed weight, height; hemoglobin, serum iron, vitamin B12, and folic acid, at the beginning and the end of the study. Statistical evaluation were done with central and dispersion indices in the dimensional variables, using Student's t test and chi² test for compare nominal variables at initial and the end of the study. RESULTS: At admission, 45 children were malnourished and 36 were anemic. At the end of the supplementation period there was a reduction to 35 malnourished (p< 0.21 and 18 anemic (p< 0.01. Anthropometric weight/height score in Z at the beginning and end of the study (x±S.D were -0.35±0.88 vs -0.14±9 (p< 0.01; Hb g/dl: 11±1.3 vs 11.9±1.9 (p< 0.001, Iron mg/dl: 108±44 vs 115±31 (p= 0.06 and vitamin B12 pg/ml: 649±494 to 1053±854 (p< 0.001. The milk was well tolerated and widely accepted. CONCLUSIONS: The consumption of a fortified whole milk during 90

  5. La road movie como modelo transnacional y su presencia en el cine español: marco metodológico y principales aportaciones.

    Directory of Open Access Journals (Sweden)

    Santiago García Ochoa

    2016-01-01

    Full Text Available El presente artículo defiende que los estudios transnacionales constituyen el marco metodológico idóneo para el estudio de la espectacular difusión de la road movie, un género nacido en EE. UU. durante la década de los 60, al menos a través de tres vías: la contraposición entre lo nacional y lo transnacional, lo transnacional entendido como fenómeno regional y el protagonismo de las migraciones en los cines postcoloniales. Finalmente se aborda el desarrollo de la road movie en España y se repasan los principales trabajos académicos sobre el tema.

  6. Humic substances in ground waters

    International Nuclear Information System (INIS)

    Paxeus, N.; Allard, B.; Olofsson, U.; Bengtsson, M.

    1986-01-01

    The presence of naturally occurring complexing agents that may enhance the migration of disposed radionuclikes and thus facilitate their uptake by plantsis a problem associated with the underground disposal of radioactive wastes in bedrock. The main purpose of this work is to characterized humic substances from ground water and compare them with humic substances from surface water. The humic materials isolated from ground waters of a borehole in Fjaellveden (Sweden) were characterized by elemental and functional group analyses. Spectroscopic properties, molecular weight distributions as well as acid-base properties of the fulvic and humic fractions were also studied. The ground water humic substances were found to be quite similar in many respects (but not identical) to the Swedish surface water humics concentrated from the Goeta River but appeared to be quite different from the American ground water humics from Biscayne Florida Aquifer or Laramie Fox-Hills in Colorado. The physico-chemical properties of the isolated humic materials are discussed

  7. Process of treating carbonaceous substances

    Energy Technology Data Exchange (ETDEWEB)

    1938-12-16

    A process is described of removing halogens or halogen compounds (or both) from the products which form when carbonaceous substances are treated thermally in the presence of halogens or halogen compounds, consisting of passing the reaction products at the same temperature with a substance able to fix halogens or acid halides through an apparatus included between the receiver and the heat exchanger, which contains, in a relatively restricted space, internal elements obliquely disposed in relation to the direction of the flow, stretched in this direction and constituted preferably of helicoidal passages.

  8. Substance Abuse and the Family.

    Science.gov (United States)

    Murphy, John P.

    1984-01-01

    Examines the effect that a substance abuser may have on the family system and the maladaptive roles sometimes assumed by family members. Discusses dysfunctional family phases and therapeutic issues and presents 11 guidelines for counselors working with chemically dependent families. (JAC)

  9. Substance Use as Impression Management.

    Science.gov (United States)

    Sharp, Mark J.; Getz, J. Greg

    1996-01-01

    Examines the function of substance use as an impression management tactic. Introductory psychology students (n=377) responded to a survey instrument measuring self-monitoring, perceived success in impression management, interaction anxiety, and self-esteem. Results suggest that alcohol use may serve an impression management function. (JPS)

  10. [Acting out and psychoactive substances: alcohol, drugs, illicit substances].

    Science.gov (United States)

    Gillet, C; Polard, E; Mauduit, N; Allain, H

    2001-01-01

    In humans, some psychotropic agents (alcohol, drugs, illicit substances) have been suggested to play a role in the occurrence of major behavioural disorders, mainly due to the suppression of psychomotor inhibition. Behavioural disinhibition is a physiological mechanism which allows humans to behave appropriately according to a given environmental situation. The behavioural disinhibition induced by either therapeutic dosage or misuse involves the loss of restraint over certain types of social behaviour and may increase the risk of auto or hetero-aggression and acting out. The increased use of psychotropic agents in recent years and the occurrence of unwanted effects are worrying and must be detected and evaluated. The objective of the present study was to establish a causal relationship between psychoactive substance use and occurrence of major behavioural disorders, such as paradoxical rage reactions and suicidal behaviour, based on a literature analysis. It consisted of reviewing reports of drug-induced violent reactions in healthy volunteers and demonstrating, where possible, a cause-effect relationship. Patients with schizophrenia and psychopathic personalities were not included in our study since psychiatric comorbidity could influence behavioural responses. Psychotropic agents included drugs, licit and illicit substances already associated with violence in the past. Many reports used the "Go/No Go test" to evaluate the disinhibiting effect of psychotropic substances; this allows the "cognitive mapping" of drugs. The results suggest that only alcohol, antidepressants, benzodiazepines and cocaïne are related to aggressive behaviour. The best known precipitant of behavioural disinhibition is alcohol, which induces aggressive behaviour. However, there are large differences between individuals, and attentional mechanisms are now recognised as being important in mediating the effects of alcohol. Suicidal tendency as an adverse antidepressant reaction is rare

  11. CONTROL PREDICTIVO HIBRIDO PARA FLOTACION DE MINERALES

    OpenAIRE

    PUTZ DE LA FUENTE, EDUARDO IGNACIO

    2014-01-01

    La minería es el sector de mayor actividad en la economía nacional, posicionando a Chile como el mayor productor y exportador de cobre a nivel mundial. Sin embargo, aún existen grandes desafíos que buscan mitigar el aumento en los costos de la energía y la disminución de las leyes de mineral, así como la promoción de nuevas tecnologías. Bajo este contexto, las tecnologías de automatización se presentan como una alternativa viable y necesaria para aumentar la productividad y confiabil...

  12. Determination experimentale des principales caracteristiques ...

    African Journals Online (AJOL)

    Through the present research work, usual scientific parameters and characteristics of Borassus palm wood from Benin, are determined. Specifically, infradensity, shrinkage coefficient and behaviour, breaking stress in the direction of the fibbers at pulling, compression and bending, are known as well as Young modulus at ...

  13. Fenomorfología y estrategias funcionales de los principales tipos de caméfitos leñosos mediterráneos del Prepirineo

    Directory of Open Access Journals (Sweden)

    Palacio, S.

    2006-12-01

    Full Text Available

    Mediterranean sub-shrubs dominate extensive areas in all mediterranean regions of the world where the high levels of stress or the frequent disturbances limit the development of trees or tall shrubs. However, despite their high ecological relevance, these plants have been much less studied than mediterranean trees and shrubs. Little is know, for example, about the different ecological strategies found within them. Indeed, these species show a great diversity of growth forms which seems indicative of their great functional diversity. This note analyzes the phenological and morphological characteristics of the main types of mediterranean sub-shrubs that grow naturally along the Prepyrenees. The main objective is to assess the ecological and functional strategies of these plants by the study of the mechanisms that enable them to withstand the stress and disturbances typical of the environments in which they grow.



    Los caméfitos leñosos dominan extensas áreas de clima mediterráneo donde los altos niveles de estrés o las frecuentes perturbaciones impiden el desarrollo de árboles y arbustos. No obstante, pese a su gran relevancia en los ecosistemas mediterráneos, la atención dedicada a su estudio ha sido muy limitada, sobre todo si se compara con los estudios realizados sobre árboles y arbustos de las mismas zonas. Se desconocen, por ejemplo, los límites de su diversidad ecológica. De hecho, este tipo de plantas presenta una gran variedad de formas de crecimiento que parece ser indicativa de sus diferentes estrategias ecológicas y, por tanto, de su elevada diversidad funcional. En esta nota se analizan las características fenológicas y morfológicas de los principales tipos de caméfitos leñosos mediterráneos existentes en las montañas prepirenaicas. El objetivo principal

  14. Plantas transgénicas: una revisión de los principales cultivos básicos en México

    Directory of Open Access Journals (Sweden)

    Paulina Rodríguez R.

    2007-01-01

    Full Text Available Los cultivos básicos principales en México son el maíz, la soya, el algodón, de los cuales se han investigado y desarrollado muchas variedades genéticamente modificadas. La aplicación de la genética es un tema muy controvertido. De momento, un aspecto fundamental es la apertura a la información de todo lo relacionado con los cultivos transgénicos para los clientes y consumidores finales. En México, el organismo encargado de la bioseguridad es CIBIOGEM, cuya función primordial es verificar el cumplimiento de las leyes y reglamentaciones adoptadas en el país en relación a la importación, consumo y siembra (inclusive a nivel experimental de cultivos transgénicos. Es importante enfatizar que las leyes nacionales están en concordancia con acuerdos internacionales como el Protocolo de Cartagena. Existen apartados en varias normas y leyes mexicanas en relación con los productos que contengan modificaciones genéticas, sin embargo a falta de una normatividad específica para la bioseguridad, en el 2005 se aprobó la Ley de Bioseguridad de Organismos Genéticamente Modificados. Para poder dictaminar un juicio en relación a los cultivos transgénicos, se debe tener claro conceptos fundamentales acerca de lo que implica que tenga una modificación genética, así como del proceso para su creación. Reconocer las principales modificaciones genéticas que pueden tener un cultivo tales como la resistencia a plaguicidas y a insectos, saber en qué consiste cada una de estas características y las herramientas estadísticas o metodologías existentes para poder determinar si un lote de un cultivo está mezclado con variedades genéticamente modificadas. El enfoque de esta revisión es presentar los conceptos relacionados con los cultivos genéticamente modificados en México tanto a importadores, procesadores industriales y para consumidores directos de granos básicos, así como para el público en general interesado

  15. Estudio diagnóstico de la mortalidad humana en el Ecuador, en la Provincia de Tungurahua, el Cantón capital Ambato y los principales cantones con el mayor porcentaje de mortalidad. República del Ecuador. 2014.

    OpenAIRE

    Castañeda Guillot, Carlos David; González Miranda, Victoria María

    2016-01-01

    Se realiza estudio diagnóstico de las diez principales causas de mortalidad humana en Ecuador a nivel de país, la provincia de Tungurahua y principales cantones basada la  investigación en  los datos del Instituto Nacional de Estadística y Censos y Ministerio de Salud Pública correspondientes al año 2014 en base al Registro Internacional de Mortalidad Humana. Por orden de incidencia predominan enfermedades cardiovasculares (isquemia del corazón, enfermedades cerebrovasculares y enfermedades h...

  16. Niveles séricos de minerales en hembras de cría bovina en un establecimiento de la región de selva y pastizal pedemontano del norte de Salta

    Directory of Open Access Journals (Sweden)

    MICHELOUD JF

    2017-12-01

    Full Text Available Las deficiencias minerales son un problema de gran impacto productivo a nivel mundial. En el Noroeste argentino (NOA la cría extensiva es una de las actividades económicas más importantes y está en franco crecimiento. En el NOA, los estudios sobre enfermedades carenciales son escasos y parciales. El presente trabajo tiene por objeto describir variaciones estacionales de los niveles séricos de calcio, fósforo, magnesio, cobre y zinc en vacas de cría y terneras de recría. En un establecimiento ganadero se seleccionaron 20 vacas y 20 terneras que fueron mantenidos en condiciones de pastoreo y sin suplementación externa. Se efectuaron muestreos de sangre a intervalos de 3 meses durante un año. Se determinaron niveles séricos de calcio, magnesio, cobre y zinc por espectrofotometría de absorción atómica y de fósforo por espectrofotometría uv-visible. Los resultados indican la existencia de hipocupremia moderada a leve en las terneras (48,6±11μg/dL durante todos los períodos muestreados. Las vacas presentaron valores promedio normales (66±3,5 μg/dL pero cercanos al límite inferior durante algunos muestreos. Se observaron niveles subnormales de fósforo durante el verano (diciembre y marzo en ambas categorías. Este trabajo sugiere que el cobre y el fósforo pueden comportarse como factores limitantes en las condiciones evaluadas. SUMMARY. Serum levels of minerals in beef heifers and cows in the cloudforest of Salta, Argentina. Mineral deficiencies are a problem of great productive impact worldwide. In the Argentine Northwest (NOA extensive breeding is one of the most important economic activities and it is in frank growth. In the NOA, studies on deficiency diseases are scarce and partial. The present work aims to describe seasonal variations of serum levels of calcium, phosphorus, magnesium, copper and zinc in beef cows and rearing calves. In a farm, 20 cows and 20 weaned heifer calves were selected, which were maintained under

  17. ORIGINAL ARTICLES An epidemiological perspective of substance ...

    African Journals Online (AJOL)

    2002-09-06

    Sep 6, 2002 ... advertising linking alcohol with the glamour of sport. This inculcates values that ... of substance use is a useful preventive strategy, hence the importance of ... substance use and associated factors (including age, gender,.

  18. Dual Diagnosis: Substance Abuse and Mental Illness

    Science.gov (United States)

    ... is a term for when someone experiences a mental illness and a substance use disorder simultaneously. Either disorder—substance use or mental illness—can develop first. People experiencing a mental health ...

  19. EPA Linked Open Data: Substance Registry Service

    Data.gov (United States)

    U.S. Environmental Protection Agency — Substance Registry Services (SRS) is the Environmental Protection Agency's (EPA) central system for information about substances that are tracked or regulated by EPA...

  20. Agency for Toxic Substances and Disease Registry

    Science.gov (United States)

    ... Z # Search Form Controls Search The CDC submit Agency for Toxic Substances and Disease Registry Note: Javascript ... gov . Recommend on Facebook Tweet Share Compartir The Agency for Toxic Substances and Disease Registry (ATSDR) , based ...

  1. Evaluación del sistema Vitek 2 para la identificación de las principales especies de levaduras del género Candida

    Directory of Open Access Journals (Sweden)

    María E Ochiuzzi

    Full Text Available El objetivo del trabajo fue evaluar el desempeño de las tarjetas YST del sistema Vitek 2 para la identificación de levaduras del género Candida. Se analizaron 168 aislamientos; los resultados fueron comparados con los obtenidos por los equipos API 20C AUX (24 % o API ID 32C (76 %. Cada cepa se subcultivó en agar cromogénico para levaduras y se observó la micromorfología. C. albicans y C. dubliniensis fueron identificadas a través de pruebas bioquímicas y moleculares adicionales. La concordancia observada fue del 98,3 %. Solo tres cepas no fueron identificadas correctamente por el sistema Vitek 2: una cepa de C. tropicalis y una de C. krusei fueron identificadas erróneamente como C. parapsilosis y otra cepa de C. krusei fue identificada de manera incompleta por el software del equipo. El tiempo promedio de identificación con las tarjetas YST fue de 18,25 h. El sistema Vitek 2 surge como un método confiable, simple y efectivo para la identificación de las principales especies del género Candida.

  2. Perfil competitivo de empresas de tercerización de procesos de Bogotá: análisis de componentes principales

    Directory of Open Access Journals (Sweden)

    NELSON ORLANDO ALARCÓN VILLAMIL

    Full Text Available El objetivo del presente artículo de resultados de investigación es analizar el perfil competitivo de empresas de tercerización de procesos de negocio (BPO, por sus siglas en Inglés de Bogotá, evaluadas a través del Modelo de Indicadores de Gestión Sostenible y Asociatividad (MIGSA y utilizando el Análisis de Componentes Principales (ACP, para distribuir las variables estudiadas en un número reducido de grupos, con el fin de dar cuenta de los aspectos que sintetizan la variabilidad en la gestión de las empresas. El estudio permitió establecer dos ejes: el primero relaciona aspectos de sostenibilidad internos a la empresa y el segundo establece elementos de sostenibilidad externos, los dos generan cuatro perfiles diferentes de competitividad, los cuales permiten a las organizaciones, además de establecer su ubicación, la generación de planes estratégicos que favorezcan su posicionamiento en el mercado.

  3. Principales afecciones dentomaxilofaciales en estudiantes de 12 años de la Escuela Secundaria Básica Urbana "Antonio Maceo Grajales"

    Directory of Open Access Journals (Sweden)

    Zulema Chávez González

    2015-04-01

    Full Text Available Se realizó un estudio descriptivo y transversal de 84 estudiantes de 12 años de la Escuela Secundaria Básica Urbana "Antonio Maceo Grajales" de Santiago de Cuba, atendidos en la Clínica Estomatológica Provincial Docente "Mártires del Moncada" de esta ciudad, desde septiembre de 2012 hasta junio de 2013, para determinar las principales afecciones dentomaxilofaciales en ellos. Se tomaron en cuenta las variables: sexo, edad, factores de riesgo de las afecciones bucales, hábitos bucales deformantes (succión digital, lengua protráctil, respiración bucal y onicofagia; estados de la dentición, gingival y de la oclusión, clasificación epidemiológica, examen extrabucal y necesidad de tratamiento. En la casuística predominaron el sexo femenino, la higiene bucal deficiente, la dieta cariogénica y la onicofagia. Se concluyó que era indispensable elevar los conocimientos sobre salud bucal para prevenir afecciones estomatológicas

  4. Ingresos fiscales y elasticidades tributarias: estimación de las elasticidades tributarias de corto y largo plazo para los principales impuestos

    Directory of Open Access Journals (Sweden)

    Carlos Conejo Fernández

    2011-12-01

    Full Text Available Este artículo tiene como objetivo proporcionar una medición de las elasticidades de los principales impuestos del sistema tributario costarricense, de manera que permita dar señales sobre los efectos que se pueden percibir conforme sucedan los cambios en la economía y que contribuya al análisis de las situación fiscal del país.  Las estimaciones de las elasticidades se obtienen por medio de la aplicación de un modelo de regresión y se estiman las elasticidades de corto y largo plazo. Las elasticidades tributarias miden el cambio que experimentan los ingresos tributarios ante cambios en el ingreso o producción nacional. Si la recaudación depende de varios factores, lo fundamental es determinar para cuál factor es útil calcular la elasticidad, a la vez, debe tenerse presente que el valor de la elasticidad depende básicamente de la estructura impositiva y de la progresividad del sistema. La elasticidad de la recaudación tributaria es una variable de gran importancia en los análisis de la evolución fiscal y para las proyecciones de ingresos tributarios. Los resultados muestran que la elasticidad de largo plazo de los ingresos presenta un comportamiento elástico con respecto a las bases que se especificaron para cada impuesto.

  5. La tributación ambiental como respuesta a los desafíos ecológicos de los municipios argentinos: principales dificultades

    Directory of Open Access Journals (Sweden)

    Rodolfo Salassa Boix

    2016-03-01

    Full Text Available Teniendo en cuenta que los municipios argentinos padecen diferentes problemáticas ambientales, que son el nivel de gobierno más idóneo para promover la protección del medio ambiente y que el Derecho tributario ofrece un gran aporte en esta materia, el objeto de este trabajo estriba en analizar dos de las principales dificultades normativos que, a nuestro juicio, enfrentan los municipios a la hora de dictar medidas tributarias ambientales. Una vez sorteadas estas dificultades se allanará el camino para poder recurrir a la Tributación Ambiental como una alternativa jurídica más para los municipios a la hora de enfrentar los problemas ecológicos que les aquejan. A raíz de ello, y sin pretender agotar todas las posibles dificultades jurídicas que presenta esta temática, el desarrollo del trabajo gira en torno a dos tipos de obstáculos. Uno de carácter sustancial, que hace a la falta de conocimiento sobre la naturaleza jurídica de las medidas tributarias ambientales y otro de carácter formal, que hace a la competencia tributaria que tienen estos entes locales para regular tales medidas.

  6. Efectos del fenómeno "El Niño 1997-98" sobre los principales recursos pelágicos en la costa peruana

    Directory of Open Access Journals (Sweden)

    Miguel Ñiquen

    2014-06-01

    Full Text Available En el período abril 1997 setiembre 1998 fueron realizados 5 cruceros de evaluación de los recursos pelágicos en la costa peruana, éstos permitieron observar cambios en la composición por especies, distribución, estructura por tamaño, reproducción y niveles poblacionales de los principales recursos pelágicos. Estos cambios guardan similitud con los observados en los eventos El Niño 1972-73 y 1982-83, especialmente en cuanto a la disminución de la biomasa de anchoveta y el incremento de otras especies pelágicas. En el período post-Niño se observó cambios notables en la estructura por tallas de anchoveta, mientras que la sardina, samas a y caballa coincidieron en mostrar buenos reclutamientos. La actividad reproductiva también se incrementó, inclusive en tallas juveniles, destacando la incidencia de sardinas sexualmente maduras con longitudes de 18-20 cm, situación que no había sido antes registrada.

  7. El sector de Software y Servicios Informáticos de Córdoba: Principales características y desempeño reciente

    Directory of Open Access Journals (Sweden)

    Carina Borrastero

    2011-12-01

    Full Text Available En este artículo nos proponemos describir las principales características del sector de Software y Servicios Informáticos de la ciudad de Córdoba, a partir de un relevamiento realizado entre fines de 2010 y el 1° semestre de 2011. Se trata de un sector en crecimiento constante desde comienzos de los años 2000, que se caracteriza por emplear mano de obra altamente calificada, poseer una alta proporción de empresas con normas certificadas de calidad, haber desarrollado interesantes, aunque en muchos casos incipientes, vinculaciones con otras organizaciones nacionales y extranjeras y dedicar un aceptable nivel de recursos y/o esfuerzos orientados a la actualización de sus productos y procesos, lo que permite explicar los favorables indicadores de desempeño sectorial exhibidos en los últimos años en cuanto a introducción de innovaciones, crecimiento del empleo y acceso a mercados externos. Aquí presentaremos los datos relativos a las características estructurales y el desempeño económico e innovador de las firmas, que respaldan las observaciones señaladas.

  8. Principales características de una guía para la planeación de salidas pedagógicas

    Directory of Open Access Journals (Sweden)

    Liliana Camargo Montoya

    2009-10-01

    Full Text Available En el presente artículo se identifican las principales características que debe tener la organización de una guía para salidas pedagógicas, teniendo en cuenta que estas deben constituir una estrategia de formación en el marco educativo, para fortalecer el desarrollo de competencias ciudadanas y científicas, orientadas al ejercicio permanente de la convivencia y la participación crítica responsable, como elemento fundamental en la relación con el ambiente. Se contrasta la Planeación y estructuración de guías desarrolladas por estudiantes de Licenciatura en Química de la Universidad Pedagógica Nacional, en donde la mitad de los estudiantes asistieron a una salida de campo, realizada a Cali con el objetivo de tratar la temática de Carbohidratos referente al espacio académico de Sistemas Orgánicos II, frente a la otra mitad de los estudiantes que no asistieron a dicha salida, el articulo esta orientado desde el enfoque pedagógico de enseñanzaAprendizaje Constructivista.

  9. Valoración ecotoxicológica de algunos de los principales grupos terapéuticos encontrados en depositos SIGRE de oficinas de farmacia

    Directory of Open Access Journals (Sweden)

    Margarita Lobo Alonso

    2012-12-01

    Full Text Available La protección del medio ambiente es uno de los principales retos de la sociedad actual. Con este objetivo a lo largo de los últimos años, la Unión Europea (UE ha ido aprobando normativas que establecen normas de carácter medioambiental que deben cumplir los medicamentos de uso humano y veterinario para su registro por las agencias reguladoras. Para reducir al máximo posibles impactos negativos sobre el medio ambiente, la industria farmacéutica ha constituido un sistema de gestión exclusivo para los envases de medicamentos, vacíos o con restos, que se generan en los domicilios españoles. El Sistema Integrado de Gestión y Recogida de Envases (SIGRE del sector farmacéutico, es una entidad sin ánimo de lucro creada para la recogida y gestión de los residuos de medicamentos que los ciudadanos generan.En este trabajo se ha llevado a cabo un estudio piloto sobre los envases depositados por la población en dos oficinas de farmacia situadas en la localidad de Coslada en Madrid, realizando una revisión bibliográfica de los efectos ecotoxicológicos de los grupos terapéuticos más frecuentemente encontrados en los depósitos SIGRE en este estudio.

  10. La estructura por edad y sexo en los principales municipios y condados de la frontera entre México y Estados Unidos

    Directory of Open Access Journals (Sweden)

    Elmyra Ybáñez Zepeda

    2009-01-01

    Full Text Available La frontera entre México y Estados Unidos ha sido escenario de importantes transformaciones sociales y demográficas, teniendo como base un sostenido crecimiento de su población. En este artículo se analiza demográficamente los principales pares de municipios y condados: Tijuana- San Diego, Mexicali-Imperial, Ciudad Juárez-El Paso y Matamoros-Cameron, utilizando información de los censos de población de 1990 y 2000 de ambos países. La dinámica demográfica de las ciudades fronterizas ha dado como resultado estructuras por edad y sexo de la población que se complementan entre sí. Del lado mexicano, los municipios tienen una población más joven debido a la inmigración. Por parte de Estados Unidos, los condados muestran un porcentaje mayor de población nativa envejecida.

  11. Principales componentes del sistema renina-angiotensina-aldosterona: historia, modulación farmacológica e impacto clínico

    Directory of Open Access Journals (Sweden)

    David Benavente, Dr.

    2010-07-01

    Full Text Available La existencia del sistema Renina-Angiotensina-Aldosterona (RAA fue postulada hace más de 100 años. Posterior al descubrimiento de sus principales componentes se inició una etapa en la que se estableció su rol patogénico en enfermedades cardiovasculares y renales. El desarrollo de fármacos capaces de inhibir la producción o bloquear la acción de los diferentes componentes de este sistema ha revolucionado la forma en la que manejamos la patología cardiovascular y renal. La identificación de nuevos elementos constituyentes de este sistema promete mejorar nuestra comprensión del funcionamiento del mismo y la posibilidad de desarrollar nuevos fármacos más selectivos en sus efectos. Todo ello garantiza que el sistema RAA continúe siendo centro de nuestra atención por muchos años.

  12. La radio en Facebook: análisis de los perfiles de las principales emisoras y programas radiofónicos en España

    Directory of Open Access Journals (Sweden)

    Jesús Díaz del Campo

    2013-06-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 Esta investigación analiza la presencia de las emisoras radiofónicas más importantes de España (Cadena Ser, Onda Cero, y Cope en Facebook. Para ello se realiza un análisis cuantitativo de los mensajes publicados a lo largo de una semana en las páginas oficiales de estas emisoras en Facebook. Se pretende estudiar qué tipo de contenidos publican estos medios a través de este canal y si, efectivamente, esta red social ha contribuido a que exista una comunicación más activa entre los medios y sus oyentes. De este modo, uno de nuestros principales objetivos es identificar las distintas estrategias empleadas por estas emisoras dentro de la red social Facebook. /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}

  13. Asociacionismo en red para la planificación del desarrollo turístico sostenible. El caso del río Guadalquivir y sus principales afluentes

    Directory of Open Access Journals (Sweden)

    Gustavo A. Contreras Cabrera

    2011-12-01

    Full Text Available A partir del año 2007 se ha producido en Andalucía un complejo proceso de cooperación institucional en red para promover el desarrollo local sostenible en el ámbito territorial del Guadalquivir. Esta situación se fundamenta en la voluntad política de impulsar el desarrollo socioeconómico de sus municipios ribereños, mediante la puesta en valor del patrimonio existente. Sus principales hitos han sido la creación de la Asociación Red de Ciudades Río Guadalquivir y el posterior Consorcio Guadalquivir Turístico, que incorpora el eje secundario del río Genil. Este artículo recoge esos antecedentes, avanzando en la posibilidad de considerar la especial condición del río Guadalquivir y otros afluentes como corredores ecológicos entre espacios naturales de alto valor para el inicio de una estrategia de desarrollo turístico sostenible en red.

  14. Búsqueda y reconocimiento de los enemigos naturales y hospedantes alternos de las principales plagas. En flores bajo invernadero en la sabana de Bogotá

    Directory of Open Access Journals (Sweden)

    Martha E. Andrade

    1989-01-01

    Full Text Available Las plagas que atacan cultivos de llores bajo invernadero son cada vez más importantes por la gravedad de su daño y por la alta densidad con que suelen presentarse. Para su control se ha acudido principalmente a la utilización de productos químicos, lo cual conduce a un aumento en los costos de producción, a contaminar el medio ambiente, a afectar la salud humana y a crear resistencia de los insectos a los insecticidas. Debido a esto, es necesario incluír dentro de los programas de control a los reguladores naturales de las plagas: parasitoides, depredadores y microorganismos entornógenos. En el presente trabajo se registran los enemigos naturales más importantes de las principales plagas en llores bajo invernadero (crisantemo, rosa y clavel: Liriomyza huidobrensis Blanchard, L. trifolii Burgess (Diptera: Agrornyzídae; Myzuz persicae Sulzer (Homoptera: Aphididae; Tetranychus urticae Koch y T. cinnabarinus Boísduval (Acarina: Tetranychidae; también se señalan las plantas hospedantes alternas presentes en las localidades donde se realizó la investigación.

  15. Abortion Legalization and Adolescent Substance Use

    OpenAIRE

    Charles, Kerwin Kofi; Stephens, Melvin, Jr

    2006-01-01

    We assess whether in utero exposure to legalized abortion in the early 1970's affected individuals' propensities to use controlled substances as adolescents. We exploit the fact that some states legalized abortion before national legalization in 1973 to compare differences in substance use for adolescents across birth cohorts in different states. We find that persons exposed to early legalization were, on average, much less likely to use controlled substances. We also assess how substance use...

  16. Substance Abuse in Aging Population

    Directory of Open Access Journals (Sweden)

    Alireza Jazayeri

    2006-10-01

    Full Text Available substance abuse' specially opiates and prescribed drugs are spreading among the older adults. Most of the time it begins as an attempt to medicate chronic pains, medical conditions and loneliness. In other instances, it simply is the continuation of a problem that begun in young adulthood. But scholars and specialists in both fields of Addiction and Gerontology, rather neglected this fast growing problem, to the extent that we almost have no data on the epidemiology, prevention and treatment modalities among the substance abusing old adults in Iran. This paper reflects the necessity of designing age specific programs to identify and treat this group. Besides, some of the most effictive methods of treatment in other countries are reviewed.

  17. Psychotropic substances in indoor environments.

    Science.gov (United States)

    Cecinato, Angelo; Romagnoli, Paola; Perilli, Mattia; Patriarca, Claudia; Balducci, Catia

    2014-10-01

    The presence of drugs in outdoor air has been established, but few investigations have been conducted indoors. This study focused on psychotropic substances (PSs) at three schools, four homes and one office in Rome, Italy. The indoor drug concentrations and the relationships with the outdoor atmosphere were investigated. The optimised monitoring procedure allowed for the determination of cocaine, cannabinoids and particulate fractions of nicotine and caffeine. In-field experiments were performed during the winter, spring and summer seasons. Psychotropic substances were observed in all indoor locations. The indoor concentrations often exceeded those recorded both outdoors at the same sites and at the atmospheric pollution control network stations, indicating that the drugs were released into the air at the inside sites or were more persistent. During winter, the relative concentrations of cannabinol, cannabidiol and tetrahydrocannabinol depended on site and indoor/outdoor location at the site. Copyright © 2014 Elsevier Ltd. All rights reserved.

  18. TOXICOLOGICAL ENDPOINTS OF DOPING SUBSTANCES

    OpenAIRE

    BASARAN, A. Ahmet

    2018-01-01

    Athletes and non athletes weighlifters have tried to gain an unfairadvantage through the use doping substances since ancient times. Dopingsubstances although enhance sports performance, represent a risk to the healthof individuals and violate the sprit of competition. The use of prohibitedperformance enhancing drugs (PED’s) or methods to improve results incompetitive sports is referred as doping. Among the PED’s used areandrogenic-anabolic steroids (AASs), diuretics and masking agents, narkot...

  19. The administration of radioactive substances

    International Nuclear Information System (INIS)

    Bourdillon, P.J.; Godfrey, B.E.; O'Brien, R.

    1983-01-01

    A brief history is given of the evolution of a system to approve the licensing of doctors and dentists to use radioactive medicinal products in man. Currently, the Administration of Radioactive Substances Advisory Committee (ARSAC) is appointed by UK Health Ministers to advise them on the granting, renewal, suspension, revocation and variation of certificates. The type of information requested on the application form for a certificate is outlined. (UK)

  20. Substance misuse in Aboriginal Australians.

    Science.gov (United States)

    Gracey, M

    1998-01-01

    Australia's Aborigines lived in isolation from the rest of humanity as successful hunter-gatherers for tens of thousands of years. That isolation ended abruptly with British colonization in the late 18th century and was followed by a traumatic 200 years for Aborigines who are now seriously disadvantaged, socio-economically and in terms of their health standards. It has often been assumed that the Aborigines had no access to psychotropic substances before permanent European contact but several pieces of evidence dispute this view. The history of Aboriginal contact with and usage of intoxicating substances, including alcohol, is extremely complex and affected by a maze of restrictive government policies. These interact with a wide range of other Federal and State policies which have changed rapidly since the late 1960s when Aborigines were first granted the franchise; access to unrestricted drinking followed soon afterwards. Today Aborigines suffer disproportionately to other Australians from the physical and social consequences of excess alcohol consumption, tobacco usage, petrol and other solvent sniffing, usage of marijuana, amphetamines, cocaine and heroin, as well as other drugs. The Aboriginal population is dispersed in cities, towns, fringe settlements, rural and remote areas over this vast continent and there are different patterns of drug usage from place to place. This review attempts to synthesize some of this information in order to give an overview to the history, background, current status of substance misuse by Aborigines as well as some strategies being used to try to overcome this serious problem.

  1. Dermal uptake of petroleum substances.

    Science.gov (United States)

    Jakasa, Ivone; Kezic, Sanja; Boogaard, Peter J

    2015-06-01

    Petroleum products are complex substances comprising varying amounts of linear and branched alkanes, alkenes, cycloalkanes, and aromatics which may penetrate the skin at different rates. For proper interpretation of toxic hazard data, understanding their percutaneous absorption is of paramount importance. The extent and significance of dermal absorption of eight petroleum substances, representing different classes of hydrocarbons, was evaluated. Literature data on the steady-state flux and permeability coefficient of these substances were evaluated and compared to those predicted by mathematical models. Reported results spanned over 5-6 orders of magnitude and were largely dependent on experimental conditions in particular on the type of the vehicle used. In general, aromatic hydrocarbons showed higher dermal absorption than more lipophilic aliphatics with similar molecular weight. The results showed high variation and were largely influenced by experimental conditions emphasizing the need of performing the experiments under "in use" scenario. The predictive models overestimated experimental absorption. The overall conclusion is that, based on the observed percutaneous penetration data, dermal exposure to petroleum hydrocarbons, even of aromatics with highest dermal absorption is limited and highly unlikely to be associated with health risks under real use scenarios. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  2. Substance misuse and substance use disorders in sex offenders: a review

    NARCIS (Netherlands)

    Kraanen, F.L.; Emmelkamp, P.M.G.

    2011-01-01

    Substance abuse has often been associated with committing sex offenses. In this article, the following will be reviewed: 1) studies that assessed substance abuse in sex offenders; 2) differences in substance abuse among different types of sex offenders; 3) differences in substance abuse between sex

  3. 21 CFR 172.510 - Natural flavoring substances and natural substances used in conjunction with flavors.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Natural flavoring substances and natural substances used in conjunction with flavors. 172.510 Section 172.510 Food and Drugs FOOD AND DRUG ADMINISTRATION....510 Natural flavoring substances and natural substances used in conjunction with flavors. Natural...

  4. Texturas de los minerales del grupo de la sílice de la manifestación epitermal El Rifle-Hato Viejo, región de Moa: clasificación, descripción e implicaciones genéticas

    Directory of Open Access Journals (Sweden)

    Leduar Ramayo-Cortés

    2001-03-01

    Full Text Available En el marco de la región de Moa, Cuba oriental, se localizan varias manifestaciones hidrotermales. Se trata de sistemas vetiformes y brechas hidrotermales con contenidos significativos de metales nobles. La manifestación hidrotermal El Rifle-Hato Viejo se destaca por su extensión, y está formada por brechas y vetas de cuarzo mineralizadas, vinculadas preferentemente a fracturas correspondientes al sistema de fallas NW-SE y se hospeda en rocas sedimentarias del Campaniense Tardío-Daniense. El estudio textural de los minerales del grupo de la sílice permitió el reconocimiento de varias texturas, las cuales fueron clasificadas en tres grupos: 1 texturas de crecimiento primario (calcedonia maciza, costriforme, en peine, cristales zonados, y maciza, 2 texturas de recristalización (mosaico, plumosa y llameante, y 3 texturas de reemplazo (en enrejado, paralelo y radiado. Sobre la base de este análisis se estableció la secuencia deposicional de los diferentes minerales del grupo de la sílice y se reveló la presencia de la paragénesis de alteración adularia-sericita, lo cual indicaría el desarrollo de un sistema epitermal de baja sulfuración. Estas texturas también se usaron para indicar el nivel de emplazamiento dentro del sistema epitermal; en este caso, el emplazamiento de la manifestación El Rifle-Hato Viejo se corresponde con el nivel intermedio o coloiforme-costriforme, el cual se encuentra por encima de la zona propicia para la deposición del oro, por lo que podría esperarse la presencia de contenidos más elevados en profundidad.

  5. Del cultivo basado en capturas, a la acuicultura independiente y la domesticación del atún rojo, Thunnus thynnus. Principales resultados, conclusiones y recomendaciones del Proyecto SELFDOTT

    OpenAIRE

    de-la-Gándara, F. (Fernando)

    2012-01-01

    Principales resultados, conclusiones y recomendaciones del Proyecto SELFDOTT (Del cultivo basado en capturas, a la acuicultura independiente y la domesticación del atún rojo, Thunnus thynnus.) Comisión Europea 7º PM (KBBE-2007-1-2-09 Cooperation Work Programme: Food, Agriculture and Fisheries, and Biotechnology), Versión de editor 0

  6. Autoradiographic localization of substance P receptors using 125I substance P

    International Nuclear Information System (INIS)

    Shults, C.W.; Quirion, R.; Jensen, R.T.; Moody, T.W.; O'Donohue, T.L.; Chase, T.N.

    1982-01-01

    This paper describes a method for localization of substance P receptors in the rat central nervous system using 125 I labeled substance P in an autoradiographic procedure. Particularly high densities of substance P receptors were observed in the olfactory bulb, dentate gyrus, amygdala, superior colliculus, and locus coeruleus. Surprisingly low densities of substance P receptors were found in the substantia nigra pars reticulata, a region which contains high concentrations of substance P

  7. Estado del conocimiento y principales amenazas de los humedales boscosos de agua dulce de Chile Knowledge status and principal threats to freshwater forested wetlands of Chile

    Directory of Open Access Journals (Sweden)

    FRANCISCO CORREA-ARANEDA

    2011-09-01

    Full Text Available Los humedales boscosos de agua dulce son áreas naturalmente inundadas o saturadas, que sustentan vegetación boscosa hidrófila, están presentes en todo el mundo, y en Chile son conocidos como "pitrantos, hualves o hualhues". El presente estudio entrega el estado del conocimiento de estos humedales en Chile, mediante una descripción de sus características biológicas, fisicoquímicas e hidrodinámicas, identificando las principales amenazas para su conservación y las principales necesidades de investigación. Estos ambientes pueden presentar inundación permanente o temporal, dependiendo de un conjunto de procesos microclimáticos, biológicos y edafológicos. Su vegetación, del tipo hidrófila boscosa, es dominada por especies de la familia Myrtaceae. Tanto el comportamiento hídrico como la estructura vegetacional destacan dentro de los aspectos que determinan directamente las características fisicoquímicas del agua y los patrones de distribución de las comunidades biológicas. Los humedales boscosos de Chile han sido ampliamente estudiados desde un punto de vista vegetacional y florístico, pero carecen de estudios limnológicos, hidrológicos o faunísticos básicos, de lo cual deriva un total desconocimiento en relación a su funcionamiento a nivel ecosistémico y los efectos que pueden tener las actividades humanas en sus cuencas (e.g., agrícola, ganadera, forestal sobre sus componentes hídricos y biológicos. A pesar de ser ecosistemas de gran relevancia cultural y ecológica, se identifican importantes falencias en cuanto a su estado de conservación, al no encontrarse protegidos por las actuales herramientas de conservación existentes en el país. Por lo tanto, emergen como ecosistemas únicos, de relevancia mundial, prácticamente desconocidos en Chile y de gran interés para el desarrollo de numerosas líneas de investigación, aunque su alta susceptibilidad ante perturbaciones de origen antrópico amenaza su permanencia

  8. Efecto de la cobertura de rastrojos en la germinación del arroz (Oryza sativa L. y principales malezas asociadas

    Directory of Open Access Journals (Sweden)

    Yemel M. Ortega

    2005-01-01

    Full Text Available Efecto de la cobertura de rastrojos en la germinacióndel arroz (Oryza sativaL. y principales malezas asociadas. Para determinar el grado de interferencia causado por distintas cantidades de rastrojos de arroz (Oryza sativaL. sobrela emergencia de arroz y malezas asociadas al cultivo, en el2003 se realizaron tres experimentos simultáneos en la hacienda el Pelón de la Bajura, Guanacaste, Costa Rica. Se aplicaron nueve tratamientos (0 a 9 t/ha de coberturas con rastrojosde la variedad de arroz CR 1113 para medir los efectos en laemergencia del arroz y malezas. Las malezas asociadas incluyen las más frecuentes en agroecosistemas arroceros inundados: Oryza sativa, Echinochloa colona, Cyperusspp., Fim-bristylisspp., Ludwigiaspp. y Heteranthera limosa. En losprimeros dos experimentos se determinaron relaciones inversas entre el grado de cobertura y la densidad de plántulas demalezas emergidas (R2>0,89, y entre el grado de cobertura yel porcentaje de germinación del arroz (R2=0,86, respectivamente. Usando coberturas con rastrojos de frijol (Phaseolusvulgaris en el tercer experimento, no se observó efecto supresor en la germinación del arroz, probablemente debido a supronta descomposición. Aunque la germinación del arroz nose afectó aún a las intensidades más altas de rastrojos evaluadas, conviene realizar pruebas similares a largo plazo para determinar posibles efectos debidos a la descomposición de residuos, alelopatía y acarreo de herbicidas después de variosciclos consecutivos del cultivo de arroz.

  9. Identificación de las principales proteínas de unión a IGF (IGFBP en tejidos de rata normal

    Directory of Open Access Journals (Sweden)

    Elizabeth Rico

    1999-12-01

    Full Text Available En este trabajo se investigó la presencia de las principales proteínas de unión a IGF-I en tejidos de rata y el tamaño de los complejos formados en cada caso. Mediante análisis de Western ligand blof (WLB y cromatografía de exclusión molecular, se separaron e identificaron cuatro proteínas de unión, correspondientes a las IGFBP-1 a IGFBP-4. En todos los tejidos analizados, se detectó la proteína IGFBP-3, aunque su concentración varió con el tipo de órgano, siendo muy abundante en hígado, riñón y corazón y escasa en órganos linfoides (timo y bazo. IGFBP-I e IGFBP-2 se identificaron en hígado y pulmón y, además, en corazón y músculo esquelético, órganos donde hasta el momento no se han identificado los correspondientes mARN, como tampoco IGFBP-4, identificada en este trabajo en pulmón. En conclusión, los resultados obtenidos indican un perfil típico para las IGFBP de acuerdo con el tejido, aunque no es claro aún si su presencia es el resultado de su síntesis NI situo de un transporte transcapilar. La identificación de sus mensajeros es un paso esencial para comprender el papel regulador que estas proteínas desempeñan en la biodisponibilidad del IGF-I en los diferentes tejidos.

  10. Principales géneros bacterianos aislados de leche de cabra en dos granjas del municipio de Tequisquiapan, Querétaro, México

    Directory of Open Access Journals (Sweden)

    Rocío Angélica Ruiz Romero

    2013-01-01

    Full Text Available El término "mastitis" se utiliza para referirse a la inflamación de la glándula mamaria. A pesar de las pérdidas económicas que produce en cabras lecheras, existe escasa información relativa al estado epidemiológico de la misma en nuestro país. El objetivo de este trabajo fue identificar bacterias presentes en leche cruda de cabras clínicamente sanas, obtenida en sistemas de producción intensivo y semi-intensivo por métodos microbiológicos tradicionales. Se trabajaron con 28 animales en sistema de producción intensiva y 33 animales en sistema de producción semiintensiva, provenientes del Centro de Enseñanza, Investigación y Extensión en Producción Animal en Altiplano (CEIEPAA perteneciente a la FMVZ-UNAM y la granja del Carmen, ambas ubicadas en Tequisquiapan, Querétaro, México. De cada una de las cabras se obtuvieron muestras de ambas glándulas, se realizaron muestreos cada 45 días junto con la prueba de California de las cabras seleccionadas hasta los 240 días de lactación. Se recibieron un total de 484 muestras para análisis bacteriológico tradicional, 90 muestras (18.6 % presentaron crecimiento bacteriano, de las cuales se recuperaron 97 aislados. Los géneros bacterianos aislados con mayor frecuenciafueron Staphylococcus coagulasa Negativo (SCN 62/97 (63.9 %, Streptococus uberis 10/97 (10.3 % y Staphylococcus aureus 5/97 (5.1 %. De acuerdo al análisis estadístico, no existen diferencias entre los dos principales géneros bacterianos aislados en ambos sistemas de producción.

  11. De las ondas a los 140 caracteres. El uso de Twitter por los principales programas de la radio española

    Directory of Open Access Journals (Sweden)

    Teresa Piñeiro Otero

    2015-01-01

    Full Text Available El proceso de radiomorfosis ha conllevado la ampliación del universo de la radiofonía a nuevas plataformas web como las redes sociales. Cadenas, emi- soras, espacios o comunicadores radiofónicos han creado sus propios perfiles en estas plataformas, mayoritariamente en Twiter y Facebook. Estos perfiles constituyen una expansión de los contenidos de la radio convencio - nal para una audiencia que, cada vez más, acude a Internet para ampliar la información de los medios tradicionales. Si en un primer momento la crea- ción de perfiles sociales por las marcas radiofónicas respondía a una ten- den cia, en el contexto actual la apropiación de dichos canales constituye una necesidad, especialmente desde aspectos como la perso nalización de con - tenidos, la participación de los oyentes-usuarios o la consolidación de co- munidades online . El presente trabajo analiza la presencia y utilización que los principales programas de la radio española dan a sus canales en Twiter. Especialmente se ha prestado atención al grado de adaptación de los espa- cios radiofónicos a esta plataforma atendiendo a aspectos como la frecuen- cia de actualización y de publicación de links, hashtags , mencio nes y retuits, así como a otras variables relacionadas con la influencia de estos perfles en la red de microblogging .

  12. Propuesta de un modelo de gestión de mantenimiento y sus principales herramientas de apoyo Proposal of a maintenance management model and its main support tools

    Directory of Open Access Journals (Sweden)

    Pablo Viveros

    2013-04-01

    Full Text Available Este artículo presenta un modelo para la gestión integral del mantenimiento, teniendo en consideración la característica de mejora continua en el tiempo. A modo de introducción y contextualización, se explica la importancia que tiene la alineación de objetivos a todo nivel organizacional para lograr la integración y correcta gestión de la unidad de mantenimiento. El modelo a presentar se compone de siete principales etapas, las cuales deben desarrollarse progresivamente según el escenario actual de la organización, haciendo énfasis en la gestión y optimización sostenida en el tiempo de procesos asociados a la planificación, programación y ejecución del mantenimiento. Adicionalmente, el modelo presentado complementa herramientas de apoyo para el desarrollo e implementación de las etapas, y características operacionales reales, las cuales podrían afectar el desempeño de la unidad de mantenimiento. Finalmente, se presentan algunas consideraciones generales y respectivas conclusiones.This paper presents a model for the integrated management of maintenance, taking into account features of continuous improvement over time. As an introduction and contextualization, it explains the importance of aligning organizational goals at all levels in order to achieve proper integration and management of the maintenance unit. The present model consists of seven main stages, which must be progressively implemented depending on the current scenario of the organization, focusing on management and sustained over time optimization of processes related to planning, programming and maintenance execution. Additionally, the model presented is supported by tools to develop and implement the stages, and provides a real operational context of the industrial maintenance management; which may affect performance. Finally, we present some general considerations and conclusions.

  13. Principales métodos para el cálculo de la lente intraocular después de la cirugía refractiva corneal

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    Taimí Cárdenas Díaz

    Full Text Available Con el surgimiento y el desarrollo de la cirugía refractiva corneal se han podido corregir quirúrgicamente a millones de pacientes con defectos refractivos. Con el cursar de los años comienza a opacarse fisiológicamente el cristalino, y disminuye la agudeza visual en estos pacientes a quienes se les modificó la curvatura corneal. Ante la necesidad de remover el cristalino y de calcular una lente intraocular de potencia adecuada para conseguir la emetropía, surge un nuevo reto a la Oftalmología. El cálculo de la lente intraocular en pacientes con cirugía refractiva corneal es mucho más complejo, pues además de tener longitudes axiales extremas, se añaden factores por la intervención previa que alteran la predictibilidad del resultado visual, con la aplicación de las fórmulas de cálculo de lente intraocular existentes. Se han descrito varios métodos que permiten determinar correctamente la potencia de la lente a implantar, dependiendo de los datos de los que se dispongan; de ahí la motivación para realizar una revisión de diferentes publicaciones con el propósito de describir los principales métodos empleados para realizar el cálculo de la lente intraocular en estos pacientes. Se utilizó la plataforma Infomed, específicamente la Biblioteca Virtual de Salud, con todos sus buscadores.

  14. Segregación residencial en las principales ciudades chilenas: Tendencias de las tres últimas décadas y posibles cursos de acción

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    Francisco Sabatini

    2001-12-01

    Full Text Available El patrón de segregación residencial de las ciudades chilenas se está transformando en dos sentidos principales: está cambiando su escala geográfica y está aumentando su malignidad. Estos cambios parecen estar afectando a la mayoría de las ciudades latinoamericanas. Están vinculados con las políticas de liberalización de los mercados de suelo y con los procesos de globalización económica y cultural de las últimas décadas. En el artículo se entrega información empírica sobre los efectos de estos cambios en tres ciudades chilenas (Santiago, Valparaíso, Concepción; y se discute teóricamente la relación entre desigualdad social y segregación espacial, rechazando el enfoque usual que ve a la segunda como un mero reflejo en el espacio de la primeraThe pattern of residential segregation is undergoing two crucial changes in Chilean cities: its geographical scale is shifting, and segregation’s malignancy is increasing. Seemingly, these changes are affecting most of Latin American cities. They are linked to the land markets’ liberalization policies and to the processes of economic and cultural globalization of the past decades. This paper presents empirical data showing the effects of these changes for three Chilean cities (Santiago, Valparaíso, Concepción; and theoretically discusses the relationship between social inequality and spatial segregation, rejecting the usual approach that considers the latter as a mere spatial reflection of the first

  15. PRINCIPALES TRASTORNOS REPRODUCTIVOS EN BÚFALAS Y VACAS EN HATOS MIXTOS Y DE UNA ESPECIE EN EL DEPARTAMENTO DE CAQUETÁ, COLOMBIA

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    J. L. Motta-Giraldo

    2014-01-01

    Full Text Available Con el objetivo de determinar los principales problemas reproductivos en vacas y bú-falas, su frecuencia y la relación con variables climáticas, se seleccionaron296 hembrasbovinas (150 de rebaños mixtos y 146 de rebaños bovinos y 238 hembras bubalinas(126 de mixtos y 112 de rebaños bubalinos.Se registraron la frecuencia de patologíasreproductivas, los indicadores reproductivos entre 2010 y 2011, así como el promediode las variables climáticas de la zona.El número de patologías reproductivas fue mayoren bovinos (n=11 que en los búfalos (n=5 y la repetición de celo fue la alteración másfrecuente en ambas especies: 36.8% y 12.6% en bovinos y búfalos, respectivamente, condiferencia significativa (P< 0.05 respecto del resto de patologías, pero no entre tiposde hatos. La frecuencia de patologías disminuyó a medida que aumentó el número departos en vacas, pero en el caso de las búfalas, las diferencias no fueron significativas.Entre las variables climáticas, sólo se encontró asociación directa entre el brillo solar ylos partos de vacas y búfalas, así como entre la amplitud térmica y los partos en el casode las búfalas (P< 0.05. Se concluye que las búfalas presentaron menor frecuencia yvariedad de patologías reproductivas que las vacas y que, tanto la frecuencia de los partoscomo de las patologías, están asociadas con el brillo solar.

  16. Principales limitantes y soluciones para la producción de alimentos: Contribución del Programa de Innovación en Matanzas, Cuba

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    Taymer Miranda

    Full Text Available Se realizó una investigación con el objetivo de identificar las limitantes para la producción de alimentos, así como sus causas y posibles soluciones, en 25 fincas de los municipios Perico, Martí, Colón y Jagüey Grande (provincia Matanzas, Cuba involucradas en el Programa de Innovación Agrícola Local (PIAL; las cuales se identificaron y construyeron, de manera conjunta, con productores, propietarios o usufructuarios de dichas fincas. El diagnóstico se hizo de forma participativa, desde los puntos de vista social, económico y ambiental, teniendo en cuenta los métodos recomendados por el CATIE de Costa Rica. Las principales limitantes identificadas fueron: la insuficiente base alimentaria para los animales; los elevados precios de los insumos agropecuarios respecto al precio de los productos; la ineficiente cadena productiva, con incumplimientos tanto de proveedores como de receptores; la falta de conocimiento agrícola de algunos propietarios o usufructuarios de reciente incorporación; así como la baja calidad genética de los animales. Estas limitantes afectan fundamentalmente la producción de leche, la cual constituye el rubro comercial de la mayoría de las fincas estudiadas, que a su vez se encuentran afectadas por la inadecuada cobertura del suelo debido al sobrepastoreo. Los resultados indicaron que los recursos obtenidos por diversas vías se debían dirigir hacia aquellos aspectos de mayor prioridad para las fincas, lo cual fue discutido durante la planificación con las familias campesinas y con las juntas directivas de las cooperativas. Esto agilizaría la elaboración de proyectos y esclarecería la dirección de las inversiones.

  17. Method for determining immunochemical substances

    International Nuclear Information System (INIS)

    O'connor, J.

    1980-01-01

    Drawing a method for detecting and measuring a predetermined specifically-bindable immunochemical substance in a liquid sample in a cuvette, comprising the steps of: (A) providing, in an immunoassay technique for the liquid sample in said cuvette, a component comprising a suspension of particles which may be agglutinated or insolubilized in relationship to the presence and concentration of the immunochemical substance in the sample; and (B) determining the presence and concentration of the immunochemical substance by measuring the electromagnetic radiation transmission properties of the sample using a calibrated radiation-measuring apparatus, said apparatus comprising: (1) a suitable electromagnetic radiation source capable of providing radiation at wavelengths equal to or less than the mean diameter of said particles; (2) means for concentrating and collimating radiation from the electromagnetic radiation source to form a beam; (3) means for filtering the beam to (I) eliminate radiation having wavelengths greater than the means diameter of the particles and (II) transmit radiation, which radiation has a range, whereby the upper wavelength is equal to or below the mean diameter of the particles, and the range is of at least about 100nm; (4) means for (I) positioning a sample-containing cuvette and for (II) allowing the filtered beam incident on the cuvette to be transmitted through the cuvette and sample, and for (III) receiving a portion of the filtered beam transmitted through the sample at two or more predetermined angles with respect to the beam; and (5) means for detecting and measuring the portion of the beam transmitted at a predetermined angle

  18. Storage of hazardous substances in bonded warehouses

    International Nuclear Information System (INIS)

    Villalobos Artavia, Beatriz

    2008-01-01

    A variety of special regulations exist in Costa Rica for registration and transport of hazardous substances; these set the requirements for entry into the country and the security of transport units. However, the regulations mentioned no specific rules for storing hazardous substances. Tax deposits have been the initial place where are stored the substances that enter the country.The creation of basic rules that would be regulating the storage of hazardous substances has taken place through the analysis of regulations and national and international laws governing hazardous substances. The regulatory domain that currently exists will be established with a field research in fiscal deposits in the metropolitan area. The storage and security measures that have been used by the personnel handling the substances will be identified to be putting the reality with that the hazardous substances have been handled in tax deposits. A rule base for the storage of hazardous substances in tax deposits can be made, protecting the safety of the environment in which are manipulated and avoiding a possible accident causing a mess around. The rule will have the characteristics of the storage warehouses hazardous substances, such as safety standards, labeling standards, infrastructure features, common storage and transitional measures that must possess and meet all bonded warehouses to store hazardous substances. (author) [es

  19. PROTEIN AND MINERAL METABOLITES FOR DAIRY COWS DURING THE TRANSITION PERIOD UNDER TROPICAL CONDITIONS METABOLITOS PROTEICOS Y MINERALES EN VACAS LECHERAS EN PERÍODO DE TRANSICIÓN BAJO CONDICIONES TROPICALES

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    Rómulo Campos Gaona

    2012-06-01

    , globulins 20.3 g L-1, urea 5.37 mmol L-1, Ca 2.56 mmol L-1, P 1.81 mmol L-1, Mg 0.81 mmol L-1 and cortisol 34.1 nmol L-1. The only significant differences between the Hartón del Valle and the Holstein breeds were total protein, globulin and the serum cortisol levels.Resumen. En bovinos, el período de transición comprende las tres últimas semanas preparto y las primeras tres posparto. Es caracterizado por adaptaciones en el metabolismo de lípidos, carbohidratos, minerales y proteínas buscando compensar el bajo consumo de materia seca y el inicio de la secreción láctea; estos cambios son regulados por corticosteroides liberados al parto. Algunos metabolitos presentan en esta etapa cambios manifiestos en su concentración sanguínea que puede llevar a problemas sanitarios, reproductivos y productivos. El objetivo fue analizar la homeostasis en el período de transición a través de la determinación de la concentración de indicadores proteicos, y de algunos macrominerales, en vacas lecheras de dos grupos raciales en condiciones de trópico bajo. El trabajo se realizó en dos fincas comerciales con similares condiciones de manejo, en la región suroriental de Colombia, en zona agroecológica de bosque seco tropical según Holdridge (1987, a 1.050 msnm., temperatura promedio de 23 ºC y precipitación anual de 1.200 mm distribuida en forma bimodal; la alimentación se basó en pasto Estrella (Cynodon nlemfuensis. Se utilizaron siete vacas Holstein y siete vacas Hartón del Valle, de las cuales se obtuvieron muestras de sangre recolectadas por venipunción coccígea en tubos a vacío, con heparina como anticoagulante y sin anticoagulante, durante el período de transición y hasta el día 60 del posparto; se analizaron un total de 156 muestras. Se determinó: proteína total, albúmina, globulinas y urea; los macrominerales Ca, P y Mg, y la hormona cortisol. Los valores promedios encontrados fueron: proteínas totales 66,7 g L-1, albúmina 37,6 g L-1, globulinas 27,7 g

  20. Adición de vitaminas y minerales a harinas de maíz y de trigo en México Vitamin and mineral addition to corn and wheat flours in Mexico

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    Jorge L. Rosado

    1999-03-01

    Full Text Available En México la deficiencia marginal de algunas vitaminas y minerales afecta la salud y la funcionalidad de un número elevado de mexicanos, por lo que la Secretaría de Salud ha iniciado un programa para promover la adición de nutrimentos a las harinas de trigo y de maíz que se procesan industrialmente. El presente documento expone las bases científicas y tecnológicas para dicha adición. El objetivo primordial es restaurar los nutrimentos que se pierden durante el proceso de obtención de las harinas y durante la fabricación de los alimentos a partir de las harinas; además, se adicionan aquellos nutrimentos cuya presencia es deficiente en una proporción importante de la población y cuya suplementación en la dieta ha demostrado ser benéfica en la salud y la funcionalidad de la población. En la definición de la fórmula para adicionar a las harinas de trigo y maíz se consideraron, además de los factores mencionados, los niveles de absorción de los diferentes nutrimentos, la interacción probable entre nutrimentos y un malgar muy amplio de seguridad, de manera que se eliminara cualquier riesgo de algún efecto adverso en la salud, aun en los niveles más altos de ingestión de los alimentos. Finalmente, se sugieren los compuestos más apropiados para la adición a las harinas considerando su reactividad y sus posibles efectos negativos en la estabilidad de las harinas, así como su biodisponibilidad, su disponibilidad en el mercado y su costo. Con lo anterior se recomienda la adición de 5 mg/kg de tiamina (mononitrato de tiamina, 3 mg/kg de riboflavina (hidroclorhidrato de riboflavina, 35 mg/kg de niacina (nicotinamida, 30 mg/kg de hierro (hierro reducido extrafino y 20 mg/kg de zinc (óxido de zinc para ambas harinas, así como 2 mg/kg y 0.5 mg/kg de ácido fólico para las harinas de trigo y maíz, respectivamente.In Mexico, marginal micronutrient deficiency is widespread and affects the health status and function of many Mexicans

  1. VALORACIÓN DE RECURSOS MINERALES BAJO LA TEORIA DEL DESARROLLO SOSTENIBLE VALORAÇÃO DE RECURSOS MINERAIS SOB A TEORIA DO DESENVOLVIMENTO SUSTENTÁVEL VALUATION OF MINERAL RESOURCES UNDER SUSTAINABLE DEVELOPMENT CONCEPT

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    Carlos Rojas

    2010-07-01

    Full Text Available El documento presenta una metodología para la valoración de los recursos minerales bajo la teoría del desarrollo sostenible. La primera parte contiene un análisis del concepto de desarrollo sostenible aplicado a la minería, luego se hace un resumen del proceso de la minería y sus implicaciones al medio ambiente y, finalmente, a partir del análisis de la renta, análisis beneficios-costos (reglas de Hotelling y Hartwick, se describe cómo obtener el valor unitario máximo por unidad de medida que pueda tener un recurso mineral definido. Se utiliza el mecanismo de la internalización de las externalidades y la monetización para conseguir la comunicación entre las ciencias implicadas en un proyecto de minería. Todo este proceso tiene escalas de tiempo y es traído a valor presente neto. La tasa de descuento que se usa para obtener el valor presente neto puede dividirse en diferentes valores para los temas operativos, sociales y ambientales, pero la elección de la tasa tiene que ser definida por aquellos que utilizan la metodología. La aplicación de esta propuesta metodológica es equiparable a la aplicación de una política social y ambiental empresarial, ya que recoge gran parte de los elementos necesarios para que se obtenga la licencia social de operación.O documento apresenta uma metodologia para a valoração dos recursos minerais sob a teoria do desenvolvimento sustentável. A primeira parte contém uma análise do conceito de desenvolvimento sustentável aplicado à mineração, posteriormente se faz um resumo do processo da mineração e suas implicações ao meio ambiente e, finalmente, a partir da análise da renda, análise benefícios-custos (regras de Hotelling e Hartwick, se descreve como obter o valor unitário máximo por unidade de medida que possa ter um recurso mineral definido. Utiliza-se o mecanismo da internalizacão das externalidades e a monetização para conseguir a comunicação entre as ci

  2. Caracterización de las principales pesquerías del golfo San Jorge Patagonia, Argentina Characterization of the main fisheries in San Jorge Gulf, Patagonia, Argentina

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    María Eva Góngora

    2012-03-01

    Full Text Available En el golfo San Jorge se desarrollan varias actividades económicas de relevancia, entre ellas dos pesquerías industriales: la pesquería de merluza común (Merluccius hubbsi Marini, 1933 y la pesquería de langostino patagónico (Pleoticus muelleri Bate, 1888, ambas se solapan espacial y temporalmente. En la pesquería de merluza del golfo San Jorge opera una flota fresquera de altura, compuesta por unas 20 embarcaciones, y una flota costera, compuesta por unas 30 embarcaciones. En esta pesquería se pesca alrededor del 10% de lo capturado en el stock sur de merluza. En la pesquería de langostino del golfo San Jorge opera una flota congeladora tangonera compuesta por 80 embarcaciones, responsable de más del 75% de los desembarques de langostino realizados en la República Argentina. Ambas pesquerías tienen como principal problema la captura incidental de merluza, en una de sus principales áreas de cría. En el presente trabajo se describe el manejo actual en las pesquerías del golfo San Jorge, el cual consiste principalmente en cierres espaciales y temporales para la pesca de langostino, y zonificaciones por estrato de flota para la merluza. En ninguna de las dos pesquerías descriptas se han tomado medidas que reduzcan eficazmente la captura incidental.In San Jorge Gulf, several important economic activities are developed, including two industrial fisheries: hake (Merluccius hubbsi Marini, 1933 and Argentine red shrimp (Pleoticus muelleri Bate, 1888. Both overlap spatially and temporally. The San Jorge Gulf hake fishery consists of a high-seas ice trawler fleet (n = 20 fishing vessels and a coastal fleet (n = 30 fishing vessels. These fisheries capture about 10% of the catch of the southern hake stock. The Argentine red shrimp fishery consists of a double-beam trawler fleet with 80 freezer vessels, responsible for more than 75% of shrimp landings in Argentina. The main problem of both fisheries is the bycatch of hake in one of its

  3. R PROJECT: SU APLICACIÓN COMO SOFTWARE LIBRE PARA ANÁLISIS EN COMPONENTES PRINCIPALES (R PROJECT: ITS USE AS OPEN SOURCE FOR PRINCIPAL COMPONENTS ANALYSIS

    Directory of Open Access Journals (Sweden)

    Bolaños Guerrero Fabricio

    2011-06-01

    Full Text Available Resumen:Este artículo es producto de un proyecto de investigación realizado en colaboración con profesores de la Escuela de Matemáticas de la Universidad de Costa Rica (UCR, para dar a conocer una opción de software estadístico llamado R Project®. Con este paquete es posible hacer Análisis en Componentes Principales (ACP y representar los resultados usando el Plano Principal y el Círculo de Correlaciones, como herramientas para poder realizar una mejor interpretación de los datos de la tabla (individuos y variables. El software R es de distribución libre, su implementación es sencilla y no requiere de mayores recursos informáticos. Dentro de sus diversas aplicaciones está el ACP, que es una herramienta que se utiliza para la interpretación de la información presentada en una tabla de datos cuantitativos; por lo tanto, las personas investigadoras de diferentes áreas tienen una opción económica y sencilla para realizar Análisis de Datos. Se llevan a cabo dos ejemplos de ACP, donde se muestra un posible uso de la herramienta y se dan las instrucciones sobre cómo realizarlo paso a paso.Abstract: This article is a product of a research project made in collaboration with teachers of the Mathematics School of the University of Costa Rica, in order to show an option of statistical software called “R Project®”. With this software, it is possible to do an Analysis in the Principal Components (PCA and to represent the results using the “principal plane” and the “circle of correlations”, as tools to have a better interpretation of the data in the chart (individuals and variables. The software R is for free distribution, its implementation is simple and it does not require great computer resources. Among its diverse applications there is the PCA, which is a tool used to interpret the information showed in a chart with quantitative data; therefore, the researchers of different areas have a cheap and simple option to do a Data

  4. Distribución de las principales causas de morbilidad por ingresos domiciliarios en el municipio Cerro durante el año 2000

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    Migdalia Rafaela Reyes Sigarreta

    2003-04-01

    Full Text Available Se hace un estudio, aplicando el método descriptivo cualitativo con una muestra representativa de las áreas de salud del municipio Cerro, de los ingresos en el domicilio de los pacientes adultos y niños en el año 2000 para determinar las causas de morbilidad y su distribución por cada área de salud. Para la recogida de información se utilizó como técnica fundamental la recolección de datos en formularios, utilizando como fuentes de información la hoja de trabajo de los médicos de los policlínicos y el registro de ingreso domiciliario. Los datos se analizan utilizando el tanto por ciento como medida de frecuencia y se presentan en tablas estadísticas. Se encontró que el mayor número de ingresos por área de salud correspondió al Policlínico "Antonio Maceo", tanto en adultos como en niños, y los meses de mayor ingreso en las áreas se corresponden con los meses de cambios climáticos, lo que se relaciona con las principales causas de morbilidad (las enfermedades respiratorias, las diarreicas y la hipertensión arterial.A descriptive qualitative study was carried out with a representative sample from the home care services given in the health areas of Cerro municipality to children and adults in the year 2000 to determine the morbidity causes and their distribution by health areas. For gathering information, the fundamental technique used was data collection in questionnaires and the worksheet of physicians working in various polyclinics and the home care service register as sources of information. The data analysis used percentage as a measure of frequency and such information was shown in statistical tables. It was found that the higher number of home care services by health area corresponded to "Antonio Maceo" polyclinics both in children and adults, and the time when more home care services were provided in the health areas was the months of climatic changes, which was related to the main causes of morbidity (respiratory

  5. Principales enfoques y estrategias metodológicas empleados en la investigación del consumo de drogas: la experiencia en México

    Directory of Open Access Journals (Sweden)

    2003-04-01

    Full Text Available En la actualidad una de las características más importantes de la investigación sobre el consumo de drogas es la gran cantidad de alternativas metodológicas puestas en práctica por las cuales se ha podido estudiar este fenómeno y evidenciar las mejores respuestas. En este trabajo se revisan las principales estrategias de investigación empleadas para el estudio del problema de la demanda de drogas en muchos países y particularmente en México, destacando sus ventajas, limitaciones y posibles combinaciones. Se parte de las narraciones aportadas por la investigación antropológica; la implementación de los conteos de casos en instituciones que posteriormente se convierten en sistemas de registros de las personas que usan drogas y que llegan a los centros sanitarios o de justicia; la metodología de investigación por encuesta; los sistemas de información especializados en forma de reporte de información sobre drogas o de vigilancia epidemiológica del consumo; los estudios mediante técnicas cualitativas de investigación desarrolladas con el empleo combinado o no de técnicas de muestreo; y la integración de muchas de estas metodologías bajo el modelo de Observatorio sobre Drogas.At present, one of the most important characteristics of the drug consumption research is the large number of methodological alternatives put into practice by which this phenomenon has been studied and the best responses have been shown. This paper reviews the main research strategies for the study of drug demands in many countries, particularly in Mexico, outlining the advantages, limitations and possible combinations. It takes as a basis the narrations of anthropological research works, the implementation of case counting in institutions that later became register systems of persons using drugs, who are sent to sanitary posts or judicial centers; the survey-based research methodology, specialized data systems in the form of data reports on drugs or on

  6. CARACTERIZACIÓN DEL USO DEL SUELO EN LAS PRINCIPALES ÁREAS AGRÍCOLAS DE LA GRAN ÁREA METROPOLITANA (GAM DECOSTA RICA

    Directory of Open Access Journals (Sweden)

    Sue Wei-Salas

    2015-01-01

    Full Text Available Con el objetivo de aportar información para el ordenamiento y la planificación del uso del suelo, mediante la caracterización de su utilización en las regiones agrícolas de la Gran Área Metropolitana (GAM, se realizó una inves - tigación entre marzo 2008 y octubre 2009, por medio de Sistemas de Información Geográfica (SIG. En el estudio se utilizaron imágenes aéreas correspondientes al proyecto Misión Carta cap - turadas entre febrero y marzo del 2005, lo que permitió identificar la distribución y extensión de los principales cultivos existentes en la GAM. Para identificar estas áreas se utilizó el método del reconocimiento remoto, el cual consiste en conocer la apariencia de un determinado cultivo en imágenes aéreas que permiten ubicar todas las áreas con aspecto similar y así identificar la adecuada diferenciación entre cultivos y usos. La información geográfica fue procesada mediante el programa de cómputo ArgGIS 9.2, el cual per - mitió obtener un mapa base a escala 1:12.500. El mapa con la distribución de las áreas de cultivo, se superpuso con información geográfica que ha sido previamente desarrollada por diferentes instituciones del país, lo que permitió caracterizar la actividad agrícola de la GAM. Los resultados muestran que la actividad agrícola cubre alrede - dor del 24% del área total de la GAM, destacán - dose la producción de hortalizas, café y plantas ornamentales bajo sarán. Las hortalizas tienen la mayor importancia en extensión, ya que abarca el 52% del área agrícola de la GAM, seguidas del café con 44%, mientras que la producción de ornamentales bajo sarán representa solamente cerca del 4%. Al analizar los cambios ocurridos en la actividad agrícola de la GAM en los últimos 28 años, en el caso del café el área de producción disminuyó en 3569 ha, lo cual corresponde al 17% de las 22 545 ha identificadas en 1983.

  7. Principales resultados del sistema cubano de Farmacovigilancia en el año 2003 Main results of the Cuban System of Drug Surveillance in 2003

    Directory of Open Access Journals (Sweden)

    Francisco Debesa García

    2004-12-01

    Full Text Available Se describe el funcionamiento y principales resultados del sistema cubano de Farmacovigilancia durante el 2003 en todos los niveles de salud de Cuba. Durante 12 meses, los casos se identificaron mediante el sistema de notificación voluntaria de sospecha de reacciones adversas a medicamentos. Se recibieron en la Unidad Nacional Coordinadora de Farmacovilancia 12 601 notificaciones de reacciones adversas medicamentosas (RAM que contenían 25 348 sospechas de RAM, para una tasa de notificación de 1 119 reportes x 1 000 000 de habitantes. El 66 % de las RAM correspondió al sexo femenino y el 34 % al masculino. En cuanto al nivel de asistencia, la atención primaria es la que más notifica con 83,5 %. Fueron resultados alentadores que en este año la relación de reacciones leves con respecto a las moderadas y graves resultó del 55,3/44,7 %, que continúa con un balance bastante bueno en relación con el reporte por severidad. Se reportaron 54 reacciones con desenlace fatal, para el 0,2 %. Las notificaciones recibidas en nuestro unidad permitieron cuantificar y caracterizar las RAM, teniendo además un gran valor para generar alertas y vigilar la seguridad de los medicamentos que circulan en nuestro país.The functioning and the main results of the Cuban Drug Surveillance System at all the health levels, in 2003, are described. During 12 months, the cases were identified by the volunteer notification system of suspicion of adverse drug reactions. 12 601 notifications of adverse drug reactions (DAR containing 25 348 DAR suspicions were received at the National Coordinating Unit of Drug Surveillance for a notification rate of 1 119 reports x 1 000 000 inhabitants. 66 % of the ADRs corresponded to females and 34 % to males. As regards the assistance level, the primary care level notifies the most with 83.5 %. It was considered as encouraging the fact that the relation of mild adverse reactions with respect to the moderate and severe was 55.3 %/44

  8. National substance use patterns on Twitter.

    Directory of Open Access Journals (Sweden)

    Hsien-Wen Meng

    Full Text Available We examined openly shared substance-related tweets to estimate prevalent sentiment around substance use and identify popular substance use activities. Additionally, we investigated associations between substance-related tweets and business characteristics and demographics at the zip code level.A total of 79,848,992 tweets were collected from 48 states in the continental United States from April 2015-March 2016 through the Twitter API, of which 688,757 were identified as being related to substance use. We implemented a machine learning algorithm (maximum entropy text classifier to estimate sentiment score for each tweet. Zip code level summaries of substance use tweets were created and merged with the 2013 Zip Code Business Patterns and 2010 US Census Data.Quality control analyses with a random subset of tweets yielded excellent agreement rates between computer generated and manually generated labels: 97%, 88%, 86%, 75% for underage engagement in substance use, alcohol, drug, and smoking tweets, respectively. Overall, 34.1% of all substance-related tweets were classified as happy. Alcohol was the most frequently tweeted substance, followed by marijuana. Regression results suggested more convenience stores in a zip code were associated with higher percentages of tweets about alcohol. Larger zip code population size and higher percentages of African Americans and Hispanics were associated with fewer tweets about substance use and underage engagement. Zip code economic disadvantage was associated with fewer alcohol tweets but more drug tweets.The patterns in substance use mentions on Twitter differ by zip code economic and demographic characteristics. Online discussions have great potential to glorify and normalize risky behaviors. Health promotion and underage substance prevention efforts may include interactive social media campaigns to counter the social modeling of risky behaviors.

  9. Substance Use among Adolescent Mothers: A Review.

    Science.gov (United States)

    Chapman, Shawna L Carroll; Wu, Li-Tzy

    2013-05-01

    Maternal substance abuse is a critical problem, and adolescent mothers appear to be at high risk for such behaviors. We review studies on postpartum adolescent substance use to explore the extent of this problem and avenues for new research. Authors screened 1,300 studies, identifying 12 articles on substance use among postpartum adolescent mothers for this review. Adolescent mothers reported greater substance use before pregnancy compared to other adolescent females. Although some adolescents continued substance use during pregnancy, most stopped using only to resume within six months after birth. Comparisons of use to national samples of nulliparous adolescent females showed a higher prevalence of substance use in this population. Substances used often varied by race/ethnicity, with white mothers more likely to smoke cigarettes and use marijuana, and Black mothers more likely than whites to drink and use drugs. Of all identified studies, only one focused on Hispanics. Beliefs about drug use grew less negative as girls transitioned from pregnancy to parenthood. As they transitioned to adulthood, substance use remained prevalent and stable. Psychological distress and low self-esteem appeared to influence continued use. Friends' cigarette smoking predicted early initiation of and persistent smoking, while increased education predicted quitting. Early initiation of substances often predicted problem behaviors. Adolescent mothers are a vulnerable population, implicating use of problem behavior theory or the self-medication hypothesis in future research. Multiple avenues for new studies are needed to help identify effective treatment and intervention for this understudied population.

  10. Humic Substances in waters for supply

    International Nuclear Information System (INIS)

    Camargo Valero, Miller; Cruz Torres, Luis Eduardo

    1999-01-01

    The humic substances make part of the degradation products of the organic matter of the soil and they are incorporate to the superficial waters for the action of laundry that they carry out by the superficial waters. These substances have been recognized as precursors in the formation of the disinfections sub-products, with free chlorine in treatment of drinkable water plants. The disinfections sub-product and the compound organic halogens, they have been classified potentially in human as cancerigenic substances, and therefore the interest in knowing more about the precursors substances, mechanisms of formation of disinfections sub-products, national situation and methods to diminish their formation

  11. Refractory organic substances in the environment

    National Research Council Canada - National Science Library

    Frimmel, F. H

    2002-01-01

    ... and its Quality Control in Fractions of Refractory Organic Substances and the Corresponding Original Water Samples 39 Introduction 39 Description of Analytical Methods 41 Sample Treatment 41 Fl...

  12. Decisions to regulate genotoxic substances

    Energy Technology Data Exchange (ETDEWEB)

    Bengtsson, G

    1988-07-01

    Decisions to regulate genotoxic substances involve trade-offs between various incomparable factors such as risks to human health and other environmental risks, public perceptions, costs and uncertainties. Two different approaches towards these trade-offs are discussed. In one approach, all relevant factors are defined and trade-offs are considered using a general and very elaborate analysis. Cost-benefit analysis is an exponent of this approach. An illustration is given for the regulation of transboundary releases of radioactive materials. The other approach considers what is politically feasible for the time being and seeks a decision with much room for later corrections. Incrementalism is a philosophy in this vein. It is illustrated by reference to the regulation of transboundary air pollution. Weaknesses and strengths of the two approaches are discussed. (author)

  13. Decisions to regulate genotoxic substances

    International Nuclear Information System (INIS)

    Bengtsson, G.

    1988-01-01

    Decisions to regulate genotoxic substances involve trade-offs between various incomparable factors such as risks to human health and other environmental risks, public perceptions, costs and uncertainties. Two different approaches towards these trade-offs are discussed. In one approach, all relevant factors are defined and trade-offs are considered using a general and very elaborate analysis. Cost-benefit analysis is an exponent of this approach. An illustration is given for the regulation of transboundary releases of radioactive materials. The other approach considers what is politically feasible for the time being and seeks a decision with much room for later corrections. Incrementalism is a philosophy in this vein. It is illustrated by reference to the regulation of transboundary air pollution. Weaknesses and strengths of the two approaches are discussed. (author)

  14. Organic substances of bituminous shales

    Energy Technology Data Exchange (ETDEWEB)

    Lanin, V A; Pronina, M V

    1944-01-01

    Samples of Gdov (Estonia) and Volga (Russia) oil shales were oxidized by alkaline permanganate to study the distribution of carbon and the composition of the resulting oxidation products. Gdov shale was rather stable to oxidation and, after 42 hours 61.2 percent of the organic material remained unoxidized. Five hundred hours were required for complete oxidation, and the oxidation products consisted of CO/sub 2/, acetic, oxalic, and succinic acids. The oxidation products from Volga shale consisted of CO/sub 2/, acetic, oxalic, succinic, adipic, phthalic, benzenetricarboxylic, benzenetetracarboxylic, and benzenepentacarboxylic acids. The results indicated that Gdov shale is free of humic substances and is of sapropelic origin, while Volga shale is of sapropelic-humic origin.

  15. Substance abuse precedes Internet addiction.

    Science.gov (United States)

    Lee, Young Sik; Han, Doug Hyun; Kim, Sun Mi; Renshaw, Perry F

    2013-04-01

    The purpose of the current study was to evaluate possible overlapping substance abuse and internet addiction in a large, uniformly sampled population, ranging in age from 13 to 18 years. Participants (N=73,238) in the current study were drawn from the 6th Korea Youth Risk Behavior Web-based Survey (KYRBWS-V) for students from 400 middle schools and 400 high schools in 16 cities within South Korea. Of adolescent internet users, 85.2% were general users (GU), 11.9% were users with potential risk for internet addiction (PR), and 3.0% were users with high risk for internet addiction (HR). There was a difference in the number of students with alcohol drinking among the GU, PR, and HR groups (20.8% vs 23.1% vs 27.4%). There was a difference in the number of students who smoked among the GS, PR, and HR groups (11.7% vs 13.5% vs 20.4%). There was a difference in the number of students with drug use among the GU, PR, and HR groups (1.7% vs 2.0% vs 6.5%). After adjusting for sex, age, stress, depressed mood, and suicidal ideation, smoking may predict a high risk for internet addiction (OR=1.203, p=0.004). In addition, drug use may predict a high risk for internet addiction (OR=2.591, paddiction have vulnerability for addictive behaviors, co-morbid substance abuse should be evaluated and, if found, treated in adolescents with internet addiction. Copyright © 2013 Elsevier Ltd. All rights reserved.

  16. Identificación de las principales competencias del personal de ventas de una empresa de consumo masivo y su relación con los resultados de alto desempeño

    OpenAIRE

    Candia Zegarra, Edgardo; Venegas Palomino, Jean Pablo

    2016-01-01

    La presente investigación nace con la finalidad de identificar cuáles son las principales de competencias del personal de ventas del sector de consumo masivo, un sector de constante crecimiento y dinamismo en el mercado peruano. En este documento se exploran las competencias de 48 vendedores de una empresa distribuidora de productos de consumo masivo, quienes laboran en el canal directo (venta mayorista) y canal indirecto (venta distribuidoras). La información sobre sus competencias se obtuvo...

  17. Peer Substance Use and Homelessness Predicting Substance Abuse from Adolescence Through Early Adulthood

    OpenAIRE

    Tompsett, Carolyn J.; Domoff, Sarah E.; Toro, Paul A.

    2013-01-01

    Adolescents who experience homelessness are at higher risk for abusing substances, and for being exposed to substance-using peers. The current study used a longitudinal design to track substance abuse, affiliation with substance-using peers, and episodes of homelessness among a sample of 223 adolescents who were homeless at thebaseline data collection and 148 adolescents who were housed at baseline. Participants were interviewed at six waves over 6.5 years, covering an age rang...

  18. Teaching Resiliency Theory to Substance Abuse Counselors

    Science.gov (United States)

    Ward, Kelly

    2003-01-01

    Resiliency is the ability to cope in the face of adversity. One protective factor that promotes resiliency in substance-abusing dysfunctional families is family rituals and traditions. Social workers and substance abuse counselors can teach family members how to instill resiliency in their families and themselves through rituals and traditions. To…

  19. Substance Abuse and the American Woman.

    Science.gov (United States)

    Columbia Univ., New York, NY. National Center on Addiction and Substance Abuse.

    The first comprehensive assessment of substance abuse and women, this report arose from an analysis of more than 1,700 scientific and technical articles, surveys, government reports and books. Results show that American women are closing the gap with men in that they are increasingly likely to abuse substances at the same rate as men. Findings…

  20. National Toxic Substance Incidents Program (NTSIP)

    Centers for Disease Control (CDC) Podcasts

    2011-02-03

    This podcast gives an overview of the three components of the National Toxic Substance Incidents Program: state surveillance, national database, and response teams.  Created: 2/3/2011 by Agency for Toxic Substances and Disease Registry.   Date Released: 2/3/2011.

  1. Factors Influencing Substance Abuse among Undergraduate ...

    African Journals Online (AJOL)

    The study investigated the factors influencing substance abuse amongundergraduate students in Osun State; Nigeria. A sample of 1, 200undergraduate students were randomly selected from three tertiaryinstitution in Osun State. Factors Influencing Substance Abuse Questionnaire (FISA) was developed by the researcher ...

  2. Determinants of psychoactive substance use among incarcerated ...

    African Journals Online (AJOL)

    The average age of first use was 12.6 ± 5.9 years. The prevalence of lifetime and current use of any substance was 88.0% and 64.3% respectively. Prior arrest, being sexually active and family drug use significantly (p<0.05) predicted lifetime use of any substance while being raised in a monogamous family was protective.

  3. CHANGES IN STRUCTURE AND CONTENT HUMIC SUBSTANCES

    Directory of Open Access Journals (Sweden)

    Maroš SIROTIAK

    2016-06-01

    Full Text Available The paper deals with the process of thermal degradation of humic substances in soil samples exposed to increased temperature. To determine the basic properties of humic substances, humic and fulvic acids are used conventional fractionation chemical laboratory methods. To determine changes in the chemical structure, the method of use of FT-IR ATR spectroscopy technique.

  4. Contextual Factors in Adolescent Substance Use.

    Science.gov (United States)

    Hochhauser, Mark; And Others

    Research on adolescent substance use has focused on prevalence and incidence; however, contextual factors have been largely ignored. A survey of 155 adolescents from a Minneapolis suburb was conducted to assess contextual factors affecting adolescent substance use. Subjects reported their use of alcohol, cigarettes, and marihuana with respect to…

  5. Perceptions of Elders' Substance Abuse and Resilience

    Science.gov (United States)

    Kane, Michael N.; Green, Diane

    2009-01-01

    Human service students' (social work, criminal justice, public administration, psychology) were surveyed (N = 242). Their perceptions about older persons' resilience and recovery from substance abuse were investigated. Overall, respondents did not agree that treating older persons for a substance abuse problem was wasteful of resources or older…

  6. Moving On: Young People and Substance Abuse

    Science.gov (United States)

    Daley, Kathryn; Chamberlain, Chris

    2009-01-01

    To help explain why some young people move from recreational drug use to substance abuse, twelve in-depth interviews were conducted with young people who had experienced problematic substance use. The data were supplemented by statistical data on 111 young people. The researchers found a variety of "structural" factors that help explain…

  7. Perception of Nigerian healthcare professionals about substance ...

    African Journals Online (AJOL)

    Results: Excess workload/stress of work was perceived as the most common reason for abusing drugs. Overall, substance abuse was perceived as a mental health problem. However, those that abuse substances more readily perceived it as a habit problem rather than a mental health challenge. Moreover, there was lower ...

  8. Physical harm due to chronic substance use

    NARCIS (Netherlands)

    van Amsterdam, Jan; Pennings, Ed; Brunt, Tibor; van den Brink, Wim

    2013-01-01

    Chronic use at high dose of illicit drugs, alcohol and tobacco is associated with physical disease. The relative physical harm of these substances has not been described before, but will benefit the guiding of policy measures about licit and illicit substances. The physical harm of 19 addictive

  9. Los valores desde las principales teorías axiológicas: Cualidades apriorísticas e independientes de las cosas y los actos humanos

    Directory of Open Access Journals (Sweden)

    Cristina Seijo

    2014-01-01

    Full Text Available En el marco de las preocupaciones actuales en torno a la reforma y la modernización administrativa, los valores desde las principales teorías axiológicas - cualidades apriorísticas e independientes de las cosas y los actos humanos – constituyen una perspectiva subjetivista, la cual parte de la idea que es el sujeto quien otorga valor a las cosas. En este sentido, éste no puede ser ajeno a las valoraciones y su existencia sólo es posible en las distintas reacciones que en el sujeto se produzcan. Las cosas por tanto no son valiosas en sí mismas: es el ser humano quien les da su valor; de allí surge la motivación de realizar la presente investigación. El sustento teórico está basado en los contenidos de Muñoz (1998, Frondizi (2001, Marín (1976, Gervilla (2003, entre otros, realizándose bajo un enfoque simbólico interpretativo, a través de una metodología cualitativa de tipo descriptiva y diseño no experimental, mediante un análisis documental. En la gerencia postmoderna se plantea la necesidad de integrar los valores de la convivencia democrática con los valores institucionales. Así, en el marco de una ética de la administración postmoderna, los valores democráticos conforman el eje de ésta última y se convierten en una propuesta orientadora para la consecución del bien común.Palabras Clave: Teorías axiológicas; cualidades apriorísticas; perspectiva subjetivista. The values from the main axiological theories: a priori and independent qualities of things and human actionsAbstractIn the context of current concerns about the reform and administrative modernization, the values from the main axiological theories: a priori and independent qualities of things and human actions, is a subjective perspective, in which part of the idea that is the person who gives value to things. In this sense, it can not be oblivious to the reviews and its existence is only possible in the various reactions that occur in the subject

  10. El uso de diferentes poblaciones referenciales en el diagnóstico de los principales problemas nutricionales en niños y adolescentes

    Directory of Open Access Journals (Sweden)

    Jaime Pajuelo

    2009-09-01

    Full Text Available Introducción: La presencia de diferentes poblaciones de referencia utilizadas para diagnosticar el sobrepeso y la obesidad, en el grupo infantil, amerita hacer un análisis comparativo que permita sacar algunas conclusiones para su uso. Objetivos: Conocer las probables diferencias, en cuanto al diagnóstico nutricional se refiere, utilizando diferentes poblaciones referenciales. Diseño: Estudio descriptivo, comparativo y transversal. Lugar: Sección de Crecimiento y Desarrollo del Hospital Dos de Mayo y Centro Educativo Estatal de Lima Metropolitana. Participantes: Niños, de ambos géneros, comprendidos entre los 2 y 17 años. Intervenciones: Se estudió 219 niños, de ambos géneros, comprendidos entre los 2 a 5 años; y 1141 niñas y adolescentes de 9 a 17 años. En el primer grupo se hizo el diagnóstico de desnutrición crónica (talla/edad +2 DE, de acuerdo a las referencias del Centro Nacional para Estadísticas en Salud (NCHS 1983 y Organización Mundial de la Salud (OMS 2005. En el segundo grupo, se utilizó el índice de masa corporal (IMC, para diagnosticar sobrepeso y obesidad en base a las referencias de Must, Cole y OMS, teniendo como criterios diagnósticos entre 85 a 95 y mayor del 95 percentil, para sobrepeso y obesidad, respectivamente. Principales medidas de resultados: Prevalencia de desnutrición crónica, sobrepeso y obesidad. Resultados: En los niños de 2 a 5 años, y para la desnutrición crónica, se ha encontrado una prevalencia de 1,8% (NCHS y 5,9% (OMS y, para la obesidad, 4,6% (NCHS y 9,1% (OMS, respectivamente. En el grupo de 9 a 17 años, por encima del 85p, la prevalencia fue 30,3% (Must, 33% (Cole y 35,2% (OMS, respectivamente; en cuanto al sobrepeso, 21% (Must, 26,3% (Cole y 18% (OMS; y para la obesidad 9,3% (Must, 6,7% (Cole y 17,2% (OMS, respectivamente. Conclusiones: Los resultados son diferentes en función de la referencia que se utilice. La referencia de la OMS identifica mayor prevalencia de desnutrici

  11. Esposas como principais provedoras de renda familiar Esposas como principales proveedoras de la renta familiar Wives as the main household earners

    Directory of Open Access Journals (Sweden)

    Izabel Guimarães Marri

    2007-06-01

    Full Text Available Este trabalho procura discutir um aspecto ainda pouco explorado do papel da mulher na formação dos rendimentos familiares, que é a situação na qual as esposas obtêm, no mercado de trabalho, rendimentos superiores aos de seus cônjuges. Além da descrição de características demográficas e socioocupacionais destas mulheres e de seus cônjuges, procura-se discutir as seguintes questões: como algumas das características observadas estão correlacionadas com a probabilidade de as famílias terem as esposas como principais provedoras; a não reversão dos padrões tradicionais de divisão do trabalho, já que a mulher mantém um número de horas muito maior do que seus cônjuges nas tarefas domésticas, mesmo quando é a principal provedora financeira do casal; e os diferenciais no rendimento médio de maridos e esposas provedores e a decomposição deste diferencial entre o que pode ser atribuído às características produtivas de ambos os grupos e o que é geralmente chamado de discriminação.Este trabajo procura discutir un aspecto aún poco explorado del papel de la mujer en la formación de los rendimientos familiares, que es la situación en la cual las esposas obtienen, en el mercado de trabajo, rendimientos superiores a los de sus cónyuges. Además de la descripción de características demográficas y socio-ocupacionales de estas mujeres y de sus cónyuges, se busca discutir los siguientes aspectos: como algunas de las características observadas están correlacionadas con la probabilidad de que las familias tengan a las esposas como principales proveedoras; la no reversión de los estándares tradicionales de división del trabajo, ya que la mujer dedica un número de horas mucho mayor que sus cónyuges a las tareas domésticas, aún cuando es la principal proveedora financiera de la pareja; los diferenciales en el rendimiento promedio de maridos y esposas proveedores y la descomposición de este diferencial entre lo que puede

  12. Principales resultados del sistema cubano de Farmacovigilancia en el año 2004 Main results of the Cuban system of pharmacological surveillance system in 2004

    Directory of Open Access Journals (Sweden)

    Francisco Debesa García

    2005-12-01

    Full Text Available Se describen los principales resultados alcanzados por el sistema cubano de Farmacovigilancia en el 2004. Durante 12 meses, los casos se identificaron mediante el sistema de notificación voluntaria de sospecha de reacciones adversas a medicamentos. Se recibieron en la Unidad Nacional Coordinadora de Farmacovigilancia 7 063 notificaciones de reacciones adversas medicamentosas (RAM que contenían 13 500 a razón de 1,9 RAM por notificación, de ellas 3 185 fueron “importantes” para el 35,1 % (según criterios para determinar RAM importantes de la UCNFv , en las Normas y procedimientos de trabajo del sistema cubano de Farmacovigilancia. La tasa de notificación anual fue de 628 notificaciones por millón de habitantes. El 64,6 % de las RAM correspondió al sexo femenino y el 35,4 % al masculino. En cuanto al nivel de asistencia, la atención primaria fue la que más notificó con 85 %. La relación de reacciones leves con respecto a las moderadas y graves fue de 48,3/51,4 %, que continúa con un balance muy bueno en relación con el reporte por severidad. Se reportaron 23 reacciones con desenlace fatal, para el 0,3 %. A pesar de la disminución en cuanto al número de notificaciones recibidas en nuestro unidad, con respecto al año anterior, aún se encuentra entre las tasas de notificación más altas de los países miembros del sistema internacional de monitoreo de RAM; por otra parte, dada la calidad de estas permitieron cuantificar y caracterizar las RAM, teniendo además un gran valor para generar alertas y vigilar la seguridad de los medicamentos que circulan en nuestro país.The main results achieved by the Cuban Pharmacological Surveillance System in the year 2004 were described. During these 12 months, the cases were identified by the voluntary notification system of suspected adverse reactions to drugs. The National Coordinating Unit of Pharmacological Surveillance (NCUPs received 7 063 notifications that included 13 500 adverse drug

  13. Substance abuse: medical and slang terminology.

    Science.gov (United States)

    Hamid, Humera; El-Mallakh, Rif S; Vandeveir, Keith

    2005-03-01

    Substance abuse is among one of the major problems plaguing our society. It has come to the attention of several healthcare professionals that a communication gap exists between themselves and substance abusers. Most of the time the substance abusers are only familiar with the slang terms of abused substances, a terminology that medical professionals are usually unaware of. This paper is an attempt to close that communication gap, allowing health care professionals to understand the slang terminology that their patients use, thus enabling them to make appropriate treatment decisions. In addition, the article presents some key features (including active ingredient, pharmacological classification, medical use, abuse form, usage method, combinations used, effects sought, long-term possible effects, and detectability in urine) of the most commonly abused substances.

  14. Flask for highly radioactive substances

    International Nuclear Information System (INIS)

    1980-01-01

    The flask for highly radioactive substances described in this invention comprises a thick steel cylinder with leak proof closures at both ends and made up of several coaxial rings in rolled sheet steel, fitted into each other and welded to each other along their edges. The inner ring is preferably in sheet steel with a lining on its internal side, for instance a stainless steel lining. Likewise the outer ring is preferably in sheet steel with a covering on its outer side. The cylindrical body of the flask is welded by its lower end to a forged steel bottom and by its upper end to a forged steel ring. The bottom can also be made with several partitions. This forged steel ring has an inside peripheral shoulder and the upper end of the flask is closed in a leak proof manner by an initial forged steel plus resting on this shoulder and bolted to it and by a second plug bolted to the free end of this ring [fr

  15. Substance Abuse Among Blacks Across the Diaspora.

    Science.gov (United States)

    Lacey, Krim K; Mouzon, Dawne M; Govia, Ishtar O; Matusko, Niki; Forsythe-Brown, Ivy; Abelson, Jamie M; Jackson, James S

    2016-07-28

    Lower rates of substance abuse are found among Black Americans compared to Whites, but little is known about differences in substance abuse across ethnic groups within the black population. We examined prevalence rates of substance abuse among Blacks across three geographic regions (US, Jamaica, Guyana). The study also sought to ascertain whether length of time, national context and major depressive episodes (MDE) were associated with substance abuse. We utilized three different data sources based upon probability samples collected in three different countries. The samples included 3,570 African Americans and 1,621 US Caribbean Black adults from the 2001-2003 National Survey of American Life (NSAL). An additional 1,142 Guyanese Blacks and 1,176 Jamaican Blacks living in the Caribbean region were included from the 2005 NSAL replication extension study, Family Connections Across Generations and Nations (FCGN). Mental disorders were based upon DSM-IV criteria. For the analysis, we used descriptive statistics, chi-square, and multivariate logistic regression analytic procedures. Prevalence of substance abuse varied by national context, with higher rates among Blacks within the United States compared to the Caribbean region. Rates of substance abuse were lower overall for women, but differ across cohorts by nativity and length of time in the United States, and in association with major depressive episode. The study highlights the need for further examination of how substance abuse disparities between US-based and Caribbean-based populations may become manifested.

  16. Substance use and motivation: a longitudinal perspective.

    Science.gov (United States)

    Korcha, Rachael A; Polcin, Douglas L; Bond, Jason C; Lapp, William M; Galloway, Gantt

    2011-01-01

    Motivation to change substance use behavior is an important component of the recovery process that has usually been studied at entry into treatment. Less studied, but equally important, is the measurement of motivation over time and the role motivation plays in subsequent substance use. The present study sought to examine longitudinal motivation toward sobriety among residents of sober living houses. Sober living residents (n = 167) were followed at 6-month intervals over an 18-month period and assessed for motivation and substance use outcomes at each study interview. Motivation was measured using the costs and benefits subscales of the Alcohol and Drug Consequences Questionnaire (ADCQ) and substance use outcomes included the Addiction Severity Index (ASI) alcohol scale, ASI drug scale, and peak density of substance use (number of days of most use in a month). Participants reported higher benefits than costs of sobriety or cutting down substance use at every study time point. Using lagged generalized estimating equation models, the ADCQ costs predicted increased severity for alcohol, drugs, and peak density, whereas the benefits subscale predicted decreased drug and peak density. Longitudinal measurement of motivation can be a useful clinical tool to understand later substance use problems. Given the mixed findings from prior studies on the effects of baseline motivation, a shift toward examining longitudinal measures of motivation at proximal and temporal intervals is indicated.

  17. Ozone depleting substances management inventory system

    Directory of Open Access Journals (Sweden)

    Felix Ivan Romero Rodríguez

    2018-02-01

    Full Text Available Context: The care of the ozone layer is an activity that contributes to the planet's environmental stability. For this reason, the Montreal Protocol is created to control the emission of substances that deplete the ozone layer and reduce its production from an organizational point of view. However, it is also necessary to have control of those that are already circulating and those present in the equipment that cannot be replaced yet because of the context of the companies that keep it. Generally, the control mechanisms for classifying the type of substances, equipment and companies that own them, are carried in physical files, spreadsheets and text documents, which makes it difficult to control and manage the data stored in them. Method: The objective of this research is to computerize the process of control of substances that deplete the ozone layer. An evaluation and description of all process to manage Ozone-Depleting Substances (ODS, and its alternatives, is done. For computerization, the agile development methodology SCRUM is used, and for the technological solution tools and free open source technologies are used. Result: As a result of the research, a computer tool was developed that automates the process of control and management of substances that exhaust the ozone layer and its alternatives. Conclusions: The developed computer tool allows to control and manage the ozone-depleting substances and the equipment that use them. It also manages the substances that arise as alternatives to be used for the protection of the ozone layer.

  18. [Adolescent substance use and family problems].

    Science.gov (United States)

    Malbergier, André; Cardoso, Luciana Roberta Donola; Amaral, Ricardo Abrantes do

    2012-04-01

    This study aimed to evaluate the association between substance use (alcohol, tobacco, and illicit drugs) and family problems among 965 adolescents from 50 public schools in two cities in São Paulo State, Brazil, in 2007. The Drug Use Screening Inventory (DUSI) was used for data collection. Use of alcohol, tobacco, and illicit drugs was associated with a negative assessment of the family relationship, lack of monitoring/support, and psychoactive substance use by family members (p illicit drugs had more family problems than those who did not consume any substance (p illicit drugs (p illicit drug use.

  19. Advances on functional neuroimaging in substance misuse

    International Nuclear Information System (INIS)

    Lv Rongbin; Liu Xingdang; Han Mei

    2009-01-01

    Over the past decade, functional neuroimaging has contributed greatly to our knowledge about the neuropharmacology of substance misuse in man. In this review, discussed the application and the progress of the positron emission tomography, single photon emission computed tomography and functional magnetic resonance imaging in the substance misuse. After reading some papers, found that the dopamine transporter was significantly decreased in the brain of subjects with heroin abuse. Also observed a significant decrease of regional cerebral blood flow in bilateral cerebral frontal lobes, temporal lobes, the insula and the ipsilateral basal nuclei in substance misuse subjects. Taken together, functional images will lead the direction in future research formedication development of addiction treatment. (authors)

  20. Continuum mechanics of single-substance bodies

    CERN Document Server

    Eringen, A Cemal

    1975-01-01

    Continuum Physics, Volume II: Continuum Mechanics of Single-Substance Bodies discusses the continuum mechanics of bodies constituted by a single substance, providing a thorough and precise presentation of exact theories that have evolved during the past years. This book consists of three parts-basic principles, constitutive equations for simple materials, and methods of solution. Part I of this publication is devoted to a discussion of basic principles irrespective of material geometry and constitution that are valid for all kinds of substances, including composites. The geometrical notions, k

  1. Former substance users working as counselors

    DEFF Research Database (Denmark)

    Hecksher, Dorte

    2007-01-01

    All helping professionals risk participation in "dual relationships". But in the case of former substance users working as counselors, specific dilemmas and problems are accentuated. A qualitative analysis highlights some of the ethical and personal dilemmas faced by these counselors. The data...... is derived from an interview study initiated in 2000 in Denmark on former substance users with 4 -8 years of abstinence. Through an analysis of interview data from a larger group of former substance users, it became evident that those working as counselors experienced specific dilemmas and problems...

  2. Las principales etapas de la evolución del metabolismo celular. Una aproximación evolucionista al estuido del metabolismo

    Directory of Open Access Journals (Sweden)

    Cunchillos, Chomin

    2000-12-01

    Full Text Available

    All biological phenomena are the result of an evolutionary process. The cellular metabolism is not one exception and traces of this process can be found in modern cells. In this paper we are pointing out, through a comparative analysis, metabolic features meaningful enough as to allow us to propose a philogenetical pattern of a display of cellular metabolism and identify the main stages of it.

    The first model of this type was developed by F. Cordón (1990 within his “Theory of Integration Levels Units” and it is part of the development of it. The pattern we are presenting here fully agrees whith that the Cordón’s, but it is reasoned from arguments outside his theory which enables us to separate the model from the theory. Besides, to arrive at the same conclusions coming from different arguments reinforces the ones from that theory and, as a consequence, the theory itself.



    Todos los fenómenos biológicos son el resultado de un proceso evolutivo. El metabolismo celular no es una excepción y en las células actuales se pueden encontrar huellas de ese proceso. En este trabajo ponemos de manifiesto, a través del análisis comparado, rasgos metabólicos suficientemente significativos como para permitirnos proponer un modelo filogenético de despliegue del metabolismo celular e identificar las principales etapas del mismo.

    El primer modelo de este tipo fue desarrollado por F. Cordón (1990, en el contexto de su teoría de unidades de niveles de integraciPrincipales afecciones oftalmológicas en el municipio de Guanes, Pinar del Río Main ophthalmologic diseases in Guanes municipality, Pinar del Río province

    Directory of Open Access Journals (Sweden)

    Alejandrina Yamila Llerena Díaz

    2010-06-01

    Full Text Available OBJETIVOS. Determinar la prevalencia global y específica de catarata, retinopatía diabética, pterigium, glaucoma y degeneración macular senil en la población. Caracterizar su prevalencia, según variables de interés epidemiológico, y medir la asociación de algunos factores de riesgo con la ocurrencia de estas enfermedades. MÉTODOS. Se realizó un estudio observacional analítico a 29 313 habitantes mayores de 5 años, pesquisados en el municipio de Guanes, en la provincia de Pinar del Río, entre el 17 de abril y el 17 de Agosto de 2006, para lo cual se utilizó la regresión logística multivariada, con un riesgo relativo (RR > 2 como muestra de asociación significativa. Los datos fueron tomados de las encuestas clínico - epidemiológicas confeccionadas al efecto y de la base de datos existente en la provincia. RESULTADOS. Se encuestó y examinó el 81,1 % de la población general, de la cual 4 720 personas tenían al menos una de las enfermedades estudiadas, lo que representó una tasa de prevalencia de 16,1 x 100 habitantes. De las principales afecciones oculares en estudio, la catarata y el pterigium fueron las que mostraron mayor prevalencia, con 7,12 y 5,93 x 100 habitantes, respectivamente. De cada 100 personas mayores de 65 años, 70 presentaron al menos una de las enfermedades oculares estudiadas, lo cual mostró una prevalencia de 69,76. CONCLUSIONES. La prevalencia general fue de 16,1 x 100 habitantes. La catarata y el pterigium fueron las más frecuentes. Los consejos populares más afectados resultaron ser Combate de Tenerías, Punta de la Sierra y Los Portales. La edad mayor de 45 años resultó ser el factor de riesgo que se asoció significativamente a la ocurrencia de catarata, degeneración macular y retinopatía diabética. En cambio, el pterigium y el glaucoma no mostraron asociación alguna con los factores de riesgo estudiados. El color de la piel y el sexo no mostraron diferencia entre ellos en las 5

  3. Substance misuse and substance use disorders in sex offenders: a review.

    Science.gov (United States)

    Kraanen, Fleur L; Emmelkamp, Paul M G

    2011-04-01

    Substance abuse has often been associated with committing sex offenses. In this article, the following will be reviewed: 1) studies that assessed substance abuse in sex offenders; 2) differences in substance abuse among different types of sex offenders; 3) differences in substance abuse between sex offenders and nonsexual offenders and substance abuse in the normal population; 4) sex offenders' intoxication at the time of the offense; and 5) differences in intoxication at the time of the offense among different types of sex offenders. Studies will be discussed according to the method they used to assess substance abuse, i.e., file research, screening instruments or semi-structured interviews. This review shows that about half of the sex offenders has a history of substance abuse, a quarter to half of the sex offenders has a history of alcohol misuse and that about one fifth to a quarter of the sex offenders has a history of drug misuse. Furthermore, about a quarter to half of the sex offenders appeared to be intoxicated at the time of the offense. The review results in recommendations for future research. Because of the high prevalence of substance abuse in sex offenders it is advisable to routinely screen for substance abuse and, if necessary, to treat substance abuse. Copyright © 2010 Elsevier Ltd. All rights reserved.

  4. Sedimentación de pulpas minerales lateríticas en la tecnología de lixiviación ácida a presión: incidencia de la composición mineralógica

    Directory of Open Access Journals (Sweden)

    José Falcón-Hernández

    2007-03-01

    Full Text Available La tecnología de lixiviación ácida a presión que utiliza la industria hidrometalúrgica cubana para la producción de níquel no alcanza a la salida del tanque espesador la concentración de sólidos según lo establecido en el diseño (48 %, lo que repercute negativamente en la economía nacional. Mediante difracción de rayos-x (DRX se determinaron las fases mineralógicas existentes en la mena y con los ensayos de sedimentación se estudió el comportamiento de éstas en las pulpas lateríticas. Se concluye que la presencia de hematita, magnetita y maghemita (fases minerales de metales pesados favorece el proceso de sedimentación de la pulpa mientras que la presencia de fases de metales ligeros como la gibbsita, cuarzo, antigorita y hematita, producen el efecto contrario.

  5. Effect of BCAA intake during endurance exercises on fatigue substances, muscle damage substances, and energy metabolism substances.

    Science.gov (United States)

    Kim, Dong-Hee; Kim, Seok-Hwan; Jeong, Woo-Seok; Lee, Ha-Yan

    2013-12-01

    The increase rate of utilization of branched-chain amino acids (BCAA) by muscle is reduced to its plasma concentration during prolonged exercise leading to glycogen. BCAA supplementation would reduce the serum activities of intramuscular enzymes associated with muscle damage. To examine the effects of BCAA administration on fatigue substances (serotonin, ammonia and lactate), muscle damage substances (CK and LDH) and energy metabolism substances (FFA and glucose) after endurance exercise. Subjects (n = 26, college-aged males) were randomly divided into an experimental (n = 13, EXP) and a placebo (n = 13, CON) group. Subjects both EXP and CON performed a bout of cycle training (70% VO2max intensity) to exhaustion. Subject in the EXP were administrated BCAA (78ml/kg·w) prior to the bout of cycle exercise. Fatigue substances, muscle damage substances and energy metabolism substances were measured before ingesting BCAAs and placebos, 10 min before exercise, 30 min into exercise, immediately after exercise, and 30 min after exercise. Data were analyzed by two-way repeated measure ANCOVA, correlation and statistical significance was set at p BCAA decreased serum concentrations of the intramuscular enzymes as CK and LDH following exhaustive exercise. This observation suggests that BCAA supplementation may reduce the muscle damage associated with endurance exercise.

  6. Recondicionamento muscular na DPOC: principais intervenções e novas tendências Recondicionamiento muscular en la enfermedad pulmonar obstructiva crónica (EPOC: principales intervenciones y nuevas tendencias Muscle reconditioning in COPD: main interventions and new tendencies

    Directory of Open Access Journals (Sweden)

    Victor Zuniga Dourado

    2004-08-01

    ergogénicas tales como esteroides­ anabólicos y creatina oral. Teniendo en vista las repercusiones negativas de la disfunción muscular en el tratamiento de la EPOC, esta revisión tiene como objetivo reunir informaciones de estudios relevantes a cerca de las principales estrategias para el recondicionamiento muscular esquelético en estos pacientes en los últimos 15 años.Physical exercises have been a vital part in the treatment of COPD patients since some time ago. These patients frequently present intolerance to exercises of variable intensity related to the skeletal-muscle dysfunction. In this context, the physical exercise is presented as the most important branch in the pulmonary rehabilitation process. The aerobic exercise and the strength training are vital in the increment of the physical capacity and quality of life, especially for individuals who present moderate or acute forms of the COPD. Furthermore, a higher research development is currently expected in relation to the application of neuromuscular electric stimulation (NMEE and to the judicious use of ergogenic substances such as anabolic steroids and oral creatin. Considering the negative repercussion of the muscle dysfunctions and the importance of the pulmonary rehabilitation in the treatment of COPD, this reviewing has as objective to gather information from relevant studies with regard to the main strategies for the skeletal-muscular reconditioning in patients in the last 15 years.

  7. prevalence of psychoactive substance use among commercial

    African Journals Online (AJOL)

    Emmanuel Ameh

    characteristics, factors influencing psychoactive substance use, impact on health status, motor cycle ... There is need for public awareness campaigns on road safety education and health .... sense of judgement, vision, emotional stability.

  8. Substance Abuse and Mental Health Services Administration

    Science.gov (United States)

    ... Locators Find treatment facilities and programs in the United States or U.S. Territories for mental and substance use ... Health Information Technology HIV, AIDS, and Viral Hepatitis Homelessness and ... and Local Government Partnerships Suicide Prevention Trauma and ...

  9. Psilocybin for treating substance use disorders?

    NARCIS (Netherlands)

    Veen, B.T. de; Schellekens, A.F.A.; Verheij, M.M.M.; Homberg, J.R.

    2017-01-01

    INTRODUCTION: Evidence based treatment for Substance use disorders (SUD) includes psychotherapy and pharmacotherapy. However, these are only partially effective. Hallucinogens, such as psilocybin, may represent potential new treatment options for SUD. This review provides a summary of (human)

  10. Summary reports on some ecotoxicologically hazardous substances

    International Nuclear Information System (INIS)

    Rueffer, H.

    1989-01-01

    Reports on industrial waste water discharge into a public sewage system initiated a study in which the available knowlege on ecologically hazardous materials was compiled. The report contains information on polychlorinated biphenyls, acrylonitride, pentachlorophenol, and further toxic substances. (UT) [de

  11. Self-esteem of pregnant substance abusers.

    Science.gov (United States)

    Higgins, P G; Clough, D H; Wallerstedt, C

    1995-01-01

    To explore patterns and levels of self-esteem of pregnant substance abusers. A descriptive prospective study to describe the self-esteem of pregnant substance abusers. Subjects (N = 31) were abusing and dependent on three or more legal and/or illegal substances. Subjects were asked one open-ended question regarding their self-esteem, then the Rosenberg Self-Esteem Inventory (RSI) was administered. Subjects gave 46 responses to the open-ended question. Overall, they used a single word to describe self-esteem. The most frequent response on the RSI was "low" for self-esteem, 23 subjects used positive terms, 20 used negative terms, and 3 reported a neutral term. The RSI confirmed the aspects of low self-esteem. Problems with low self-esteem were evident. Intervention strategies need to be developed to increase self-esteem in pregnant substance abusers.

  12. Toxicities of selected substances to freshwater biota

    Energy Technology Data Exchange (ETDEWEB)

    Hohreiter, D.W.

    1980-05-01

    The amount of data available concerning the toxicity of various substances to freshwater biota is so large that it is difficult to use in a practical situation, such as environmental impact assessment. In this document, summary tables are presented showing acute and/or chronic toxicity of selected substances for various groups of aquatic biota. Each entry is referenced to its original source so that details concerning experimental conditions may be consulted. In addition, general information concerning factors modifying toxicity, synergisms, evidence of bioaccumulation, and water quality standards and criteria for the selected substances is given. The final table is a general toxicity table designed to provide an easily accessible and general indication of toxicity of selected substances in aquatic systems.

  13. Substance Use and Abuse in South Africa

    African Journals Online (AJOL)

    Africa: Insights from Brain and. Behavioural ... and neuro-psychology, and human genetics to economics and mathematics. As such, it represents an active cohort of researchers and practitioners working in the area of substance use and abuse.

  14. Spiced: The Global Marketing of Psychoactive Substances

    OpenAIRE

    Graham, John

    2016-01-01

    Graham hopes to expose marketing’s role in sustaining our addiction to sugar, tobacco, and other psychoactive substances and to then inspire a discussion of strategies for reining in that marketing. 

  15. [Licit and illicit substance use during pregnancy].

    Science.gov (United States)

    Lamy, Sandrine; Delavene, Héloise; Thibaut, Florence

    2014-03-01

    Licit and illicit substance use during pregnancy is a major public health concern. Alcohol and substance (tobacco, cannabis, cocaine...) use prevalence during pregnancy remains under estimated. Some studies have reported the prevalence of alcohol or substance use in different countries worldwide but most of them were based on the mother's interview. Consumption of one or more psychoactive substances during pregnancy may have serious consequences on the pregnancy and on the child development. However, the type of consequences is still a matter of controversies. The reasons are diverse: different rating scales, potential interactions with environmental and genetic factors. Considering the negative consequences of drug use during pregnancy, preventive campaigns against the use of drugs during pregnancy are strongly recommended.

  16. Gender differences in substance use disorders.

    Science.gov (United States)

    Brady, K T; Randall, C L

    1999-06-01

    Despite the fact that the rate of substance abuse and dependence is higher among men than it is among women, the prevalence rates, especially the more recent ones, indicate that a diagnosis of substance abuse is not gender specific. From the emerging literature on gender differences over the past 25 years, male and female substance abusers are clearly not the same. Women typically begin using substances later than do men, are strongly influenced by spouses or boyfriends to use, report different reasons for maintaining the use of the substances, and enter treatment earlier in the course of their illnesses than do men. Importantly, women also have a significantly higher prevalence of comorbid psychiatric disorders, such as depression and anxiety, than do men, and these disorders typically predate the onset of substance-abuse problems. For women, substances such as alcohol may be used to self-medicate mood disturbances, whereas for men, this may not be true. Although these comorbid disorders might complicate treatment for women, women are, in fact, responsive to treatment and do as well as men in follow-up. Gender differences and similarities have significant treatment implications. This is especially true for the telescoping phenomenon, in which the window for intervention between progressive landmarks is shorter for women than for men. This is also true for the gender differences in physical and sexual abuse, as well as other psychiatric comorbidity that is evident in female substance abusers seeking treatment. The barriers to treatment for women are being addressed in many treatment settings to encourage more women to enter treatment, and family and couples therapy are standard therapeutic interventions. Negative consequences associated with substance abuse are different for men and women, and gender-sensitive rating instruments must be used to measure not only the severity of the problem but also to evaluate treatment efficacy. To determine whether gender

  17. Apparatus for storing and processing fissionable substances

    International Nuclear Information System (INIS)

    Dubovsky, B.G.; Bogatyrev, V.K.; Vladykov, G.M.; Sviridenko, V.Y.

    1974-01-01

    An apparatus is described for storing and processing fissionable substances in which there is provided a protective shield in the form of a layer of neutron absorbing material located in direct proximity to a vessel with a fissionable substance contained therein. The layer of neutron retarding material according to the present invention has alternating projections and depressions facing the layer of neutron-absorbing material. (author)

  18. Ecuador: las negociaciones comerciales en el ámbito de los principales esquemas de integración: CAN-MERCOSUR y ALCA: Período 1994-2003

    OpenAIRE

    Poveda, María Elena

    2004-01-01

    El inicio del siglo XXI, particularmente luego del 11 de septiembre del 2001, ha colocado a todos los países frente al desafío de las relaciones internacionales. Como parte del conglomerado de naciones, el Ecuador tiene múltiples temas de análisis y definiciones sobre su participación en los diferentes esquemas de integración. Es así como el tema “ Ecuador: Las Negociaciones Comerciales en el ámbito de los Principales Esquemas de Integración: CAN – MERCOSUR Y ALCA: Período 1994 – 2003”, resp...

  19. La modernización del discurso jurídico español impulsada por el Ministerio de Justicia. Presentación y principales aportaciones del Informe sobre el lenguaje escrito

    OpenAIRE

    Montolío Durán, Estrella

    2012-01-01

    En los tres primeros apartados, este artículo presenta el propósito y el contenido del Informe de la Comisión de modernización del lenguaje jurídico, elaborado por la Comisión interministerial constituida por acuerdo del Consejo de Ministros de 30 de diciembre de 2009. Más concretamente, este trabajo describe las principales aportaciones de uno (el más amplio) de los seis trabajos de campo que fundamentan dicho informe: el Informe sobre el lenguaje escrito, elaborado por el grupo de investiga...

  1. Perfluoroalkyl substances and fish consumption.

    Science.gov (United States)

    Christensen, Krista Y; Raymond, Michelle; Blackowicz, Michael; Liu, Yangyang; Thompson, Brooke A; Anderson, Henry A; Turyk, Mary

    2017-04-01

    Perfluoroalkyl substances (PFAS) are an emerging class of contaminants. Certain PFAS are regulated or voluntarily limited due to concern about environmental persistence and adverse health effects, including thyroid disease and dyslipidemia. The major source of PFAS exposure in the general population is thought to be consumption of seafood. In this analysis we examine PFAS levels and their determinants, as well as associations between PFAS levels and self-reported fish and shellfish consumption, using a representative sample of the U.S. Data on PFAS levels and self-reported fish consumption over the past 30 days were collected from the 2007-2008, 2009-2010, 2011-2012, and 2013-2014 cycles of the National Health and Nutrition Examination Survey. Twelve different PFAS were measured in serum samples from participants. Ordinary least squares regression models were used to identify factors (demographic characteristics and fish consumption habits) associated with serum PFAS concentrations. Additional models were further adjusted for other potential exposures including military service and consumption of ready-to-eat and fast foods. Seven PFAS were detected in at least 30% of participants and were examined in subsequent analyses (PFDA, PFOA, PFOS, PFHxS, MPAH, PFNA, PFUA). The PFAS with the highest concentrations were PFOS, followed by PFOA, PFHxS and PFNA (medians of 8.3, 2.7, 1.5 and 1.0ng/mL). Fish consumption was generally low, with a median of 1.2 fish meals and 0.14 shellfish meals, reported over the past 30 days. After adjusting for demographic characteristics, total fish consumption was associated with reduced MPAH, and with elevated PFDE, PFNA and PFuDA. Shellfish consumption was associated with elevations of all PFAS examined except MPAH. Certain specific fish and shellfish types were also associated with specific PFAS. Adjustment for additional exposure variables resulted in little to no change in effect estimates for seafood variables. PFAS are emerging

  2. A Review of Plant Growth Substances

    Directory of Open Access Journals (Sweden)

    D.A. Agboola

    2014-10-01

    Full Text Available Plant growth substances are compounds, either natural or synthetic that modifies or controls through physiological action, the growth and maturation of plants. If the compound is produced within the plant, it is called a plant hormone or phytohormone. In general, it is accepted that there are five major classes of plant hormones. They are Auxins (IAA, Cytokinins, Gibberellins, Ethylene and Abscisic Acid. However, there are still many plant growth substances that cannot be grouped under these classes, though they also perform similar functions, inhibiting or promoting plant growth. These substances include Brassinosteroids (Brassins, Salicylic Acid, Jasmonic Acid, Fusicoccin, Batasins, Strigolactones, Growth stimulants (e.g. Hymexazol and Pyripropanol, Defoliants (e.g. Calcium Cyanamide, Dimethipin. Researchers are still working on the biosynthetic pathways of some of these substances. Plant growth substances are very useful in agriculture in both low and high concentrations. They affect seed growth, time of flowering, the sex of flowers, senescence of leaves and fruits, leaf formation, stem growth, fruit development and ripening, plant longevity, and even plant death. Some synthetic regulators are also used as herbicides and pesticides. Therefore, attention should be paid to the production and synthesis of these substances so that they affect plants in a way that would favour yield.

  3. The natural history of substance use disorders.

    Science.gov (United States)

    Sarvet, Aaron L; Hasin, Deborah

    2016-07-01

    Illicit drugs, alcohol, and tobacco use disorders contribute substantially to the global burden of disease. Knowledge about the major elements of the natural history of substance use disorders (incidence, remission, persistence, and relapse) is crucial to a broader understanding of the course and outcomes of substance use disorders. Prospective cohort studies in nonclinical samples indicate that externalizing psychopathology in earlier life, including early disordered substance use, delinquency, and personality disorders, are related to substance use disorders later in life and chronic course. Externalizing psychopathology may be initiated by early adverse experiences, for example, childhood maltreatment and stressful life events. After controlling for confounders, 'age at first use' as a causal factor for alcohol use disorder later in life and the 'drug substitution' hypothesis are not supported in general population data. Future research should focus on elaborating the causal framework that leads to the development and persistence of severe substance use disorders, with an emphasis on identifying modifiable factors for intervention by policy makers or health professionals. More research is needed on the natural history of substance use disorders in low-income and middle-income countries.

  4. Psychiatric Consultation and Substance Use Disorders

    Directory of Open Access Journals (Sweden)

    Sheila Specker

    2009-01-01

    Full Text Available Background A substantial number of patients in general hospitals will evince substance abuse problems but a majority is unlikely to be adequately identified in the referral-consultation process. This failure may preclude patients from receiving effective interventions for substance use disorders. Objectives 1. To evaluate all referred patients for possible substance use disorders. 2. To ascertain the degree of convergence between patients referred for chemical problems and the corresponding DSM diagnosis. 3. To compare demographic data for substance abusing patients and referrals not so classified. 4. To evaluate conditions concomitant with substance use disorders. Method Consecutive one-year referrals (524 to consultation-liaison psychiatric services were scrutinized for chemically-related problems by psychiatric consultants. Results Of the referrals, 176 met criteria for substance use disorders (SUD (57% alcohol; 25% other drugs; 18% both alcohol and other drugs. Persons diagnosed with SUD tended to be younger, male, non-Caucasian, unmarried, and unemployed. They were more likely to be depressed, have liver and other gastrointestinal problems, and to have experienced traumatic events; they also tended to have current financial difficulties. Most were referred for SUD evaluation by personnel in general medicine and family practice. Following psychiatric consultation, SUD designated patients were referred mainly to substance abuse treatment programs. The only variable related to recommended inpatient versus outpatient services for individuals with SUD was the Global Assessment of Functioning Axis (GAF with persons having lower estimated functioning more likely to be referred for inpatient interventions. Conclusions These data are similar to the results of past studies in this area. Unlike previous investigations in the domain of consultative-liaison psychiatry, financial stressors and specific consultant recommendations were included in data

  5. Psychiatric Consultation and Substance Use Disorders

    Directory of Open Access Journals (Sweden)

    Sheila Specker

    2009-11-01

    Full Text Available Background: A substantial number of patients in general hospitals will evince substance abuse problems but a majority is unlikely to be adequately identified in the referral-consultation process. This failure may preclude patients from receiving effective interventions for substance use disorders. Objectives: 1. To evaluate all referred patients for possible substance use disorders. 2. To ascertain the degree of convergence between patients referred for chemical problems and the corresponding DSM diagnosis. 3. To compare demographic data for substance abusing patients and referrals not so classified. 4. To evaluate conditions concomitant with substance use disorders. Method: Consecutive one-year referrals (524 to consultation-liaison psychiatric services were scrutinized for chemically-related problems by psychiatric consultants. Results: Of the referrals, 176 met criteria for substance use disorders (SUD (57% alcohol; 25% other drugs; 18% both alcohol and other drugs. Persons diagnosed with SUD tended to be younger, male, non-Caucasian, unmarried, and unemployed. They were more likely to be depressed, have liver and other gastrointestinal problems, and to have experienced traumatic events; they also tended to have current financial difficulties. Most were referred for SUD evaluation by personnel in general medicine and family practice. Following psychiatric consultation, SUD designated patients were referred mainly to substance abuse treatment programs. The only variable related to recommended inpatient versus outpatient services for individuals with SUD was the Global Assessment of Functioning Axis (GAF with persons having lower estimated functioning more likely to be referred for inpatient interventions. Conclusions: These data are similar to the results of past studies in this area. Unlike previous investigations in the domain of consultative-liaison psychiatry, financial stressors and specific consultant recommendations were included in

  6. 21 CFR 1307.13 - Incidental manufacture of controlled substances.

    Science.gov (United States)

    2010-04-01

    ..., manufactures a controlled substance as a result of the manufacture of a controlled substance or basic class of controlled substance for which he is registered and has been issued an individual manufacturing quota pursuant to part 1303 of this chapter (if such substance or class is listed in Schedule I or II) shall be...

  7. CHALLENGES IN IDENTIFYING THE NEW-GENERATION PSYCHOACTIVE SUBSTANCES

    OpenAIRE

    SALKIM IŞLEK, Dilek; CENGIZ, Salih; RAYIMOĞLU, Gülten; ÇAVUŞ, Fatma; YÜKSELOĞLU, Emel Hülya

    2018-01-01

    A psychoactivesubstance is a substance that affects the central nervous system, alters brainfunctions, and leads to changes in perception, mood and behavior.Apart fromwell-known psychoactive substances, there are some substances callednew-generation psychoactive substances that have risen in recent years. Suchsubstances may be divided into 4 categories: Synthetic cannabinoids, cathinonederivatives, phenylethylamine derivatives, and others including tryptamines,piperazines, hallucinogenic mush...

  8. Review of the Proposed "DSM-5" Substance Use Disorder

    Science.gov (United States)

    Jones, K. Dayle; Gill, Carman; Ray, Shannon

    2012-01-01

    The "DSM-5" Task Force has recommended a new substance use disorder to replace substance abuse and dependence. This article provides an overview of substance abuse and dependence, a description of the "DSM-5" substance use disorder, and implications and potential consequences of this change.

  9. Attitude and Peer Influences on Adolescent Substance Use: The Moderating Effect of Age, Sex, and Substance.

    Science.gov (United States)

    Musher-Eizenman, Dara R.; Holub, Shayla C.; Arnett, Mitzi

    2003-01-01

    Examines the importance of peer influence and personal attitudes in relation to self-reported use of alcohol, cigarettes, and marijuana for 213 younger adolescents and 219 older adolescents. Friends' use was significantly related to substance use for both age groups, both sexes, and all substances examined. Resistance self- efficacy was…

  10. Playing video games while using or feeling the effects of substances: associations with substance use problems.

    Science.gov (United States)

    Ream, Geoffrey L; Elliott, Luther C; Dunlap, Eloise

    2011-10-01

    This study tested the hypothesis that playing video games while using or feeling the effects of a substance--referred to herein as "concurrent use"-is related to substance use problems after controlling for substance use frequency, video gaming as an enthusiastic hobby, and demographic factors. Data were drawn from a nationally representative online survey of adult video gamers conducted by Knowledge Networks, valid n = 2,885. Problem video game playing behavior was operationalized using Tejeiro Salguero and Bersabé Morán's 2002 problem video game play (PVP) measure, and measures for substance use problems were taken from the National Survey of Drug Use and Health (NSDUH). Separate structural equation modeling analyses were conducted for users of caffeine, tobacco, alcohol, and marijuana. In all four models, concurrent use was directly associated with substance use problems, but not with PVP. Video gaming as an enthusiastic hobby was associated with substance use problems via two indirect paths: through PVP for all substances, and through concurrent use for caffeine, tobacco, and alcohol only. Results illustrate the potential for "drug interaction" between self-reinforcing behaviors and addictive substances, with implications for the development of problem use.

  11. Effects of humic substances on the migration of radionuclides: Complexation of actinides with humic substances

    International Nuclear Information System (INIS)

    Kim, J.I.; Rhee, D.S.; Wimmer, H.; Buckau, G.; Klenze, R.; Decambox, P.; Moulin, C.; Moulin, V.; Tits, J.; Marquardt, C.; Herrmann, G.; Trautmann, N.; Dierckx, A.; Vancluysen, J.; Maes, A.

    1992-09-01

    The aim of the present research programme is to study the complexation behaviour of actinide ions with humic substances in natural aquifer systems and hence to quantify the effect of humic substances on the actinide migration. Aquatic humic substances commonly found in all groundwaters in different concentrations have a strong tendency towards complexation with actinide ions. This is one of the major geochemical reactions but hitherto least quantified. Therefore, the effect of humic substances on the actinide migration is poorly understood. In the present research programme the complexation of actinide ions with humic substances will be described thermodynamically. This description will be based on a model being as simple as possible to allow an easy introduction of the resulting constants into geochemical modelling of the actinide migration. (orig.)

  12. Screening for prenatal substance use: development of the Substance Use Risk Profile-Pregnancy scale.

    Science.gov (United States)

    Yonkers, Kimberly A; Gotman, Nathan; Kershaw, Trace; Forray, Ariadna; Howell, Heather B; Rounsaville, Bruce J

    2010-10-01

    To report on the development of a questionnaire to screen for hazardous substance use in pregnant women and to compare the performance of the questionnaire with other drug and alcohol measures. Pregnant women were administered a modified TWEAK (Tolerance, Worried, Eye-openers, Amnesia, K[C] Cut Down) questionnaire, the 4Ps Plus questionnaire, items from the Addiction Severity Index, and two questions about domestic violence (N=2,684). The sample was divided into "training" (n=1,610) and "validation" (n=1,074) subsamples. We applied recursive partitioning class analysis to the responses from individuals in the training subsample that resulted in a three-item Substance Use Risk Profile-Pregnancy scale. We examined sensitivity, specificity, and the fit of logistic regression models in the validation subsample to compare the performance of the Substance Use Risk Profile-Pregnancy scale with the modified TWEAK and various scoring algorithms of the 4Ps. The Substance Use Risk Profile-Pregnancy scale is comprised of three informative questions that can be scored for high- or low-risk populations. The Substance Use Risk Profile-Pregnancy scale algorithm for low-risk populations was mostly highly predictive of substance use in the validation subsample (Akaike's Information Criterion=579.75, Nagelkerke R=0.27) with high sensitivity (91%) and adequate specificity (67%). The high-risk algorithm had lower sensitivity (57%) but higher specificity (88%). The Substance Use Risk Profile-Pregnancy scale is simple and flexible with good sensitivity and specificity. The Substance Use Risk Profile-Pregnancy scale can potentially detect a range of substances that may be abused. Clinicians need to further assess women with a positive screen to identify those who require treatment for alcohol or illicit substance use in pregnancy. III.

  13. Sexual orientation, substance use behaviors and substance dependence in the United States

    Science.gov (United States)

    McCabe, Sean Esteban; Hughes, Tonda L.; Bostwick, Wendy B.; West, Brady T.; Boyd, Carol J.

    2009-01-01

    Aims To assess past-year prevalence rates of substance use behaviors and substance dependence across three major dimensions of sexual orientation (identity, attraction, and behavior) in a large national sample of adult women and men in the United States. Design Data were collected from structured diagnostic face-to-face interviews using the Alcohol Use Disorder and Associated Disabilities Interview Schedule DSM-IV Version (AUDADIS-IV). Setting Prevalence estimates were based on data collected from the 2004–2005 (Wave 2) National Epidemiologic Survey on Alcohol and Related Conditions (NESARC). Participants A large national sample of 34,653 adults aged 20 years and older: 52% female, 71% White, 12% Hispanic, 11% African American, 4% Asian, and 2% Native American or other racial/ethnic categories. Findings Approximately 2% of the sample self-identified as lesbian, gay or bisexual; 4% reported at least one lifetime same-sex sexual partner, and 6% reported same-sex sexual attraction. Although non-heterosexual orientation was generally associated with a higher risk of substance use and substance dependence, the majority of sexual minority respondents did not report substance use or meet criteria for DSM-IV substance dependence. There was considerable variation in substance use outcomes across sexual orientation dimensions; these variations were more pronounced among women than among men. Conclusions Results support previous research findings of heightened risk of substance use and substance dependence among some sexual minority groups and point to the need for research that examines reasons for such differences. Results also highlight important gender differences and question previous findings indicating uniformly higher risk for substance dependence among sexual minorities. Risks appear to vary based on gender and how sexual orientation is defined. Findings have implications for prevention and intervention efforts that more effectively target subgroups at greatest

  14. Substance use during pregnancy and postnatal outcomes

    DEFF Research Database (Denmark)

    Irner, Tina Birk; Teasdale, Thomas William; Tine, Nielsen

    2012-01-01

    mothers continued to use substances throughout their pregnancies were born at a lower gestational age (Chi-Square = 15.1(2), P alcohol and those with no substance exposure. The same children were more...... pregnancy, as well as their background, and to examine the effect substance use has on gestational age, birth weight, and the development of neonatal abstinence syndrome at birth. A sample of 161 pregnant women and their 163 newborn children were included. The results indicate that the children whose...... vulnerable to the development of neonatal abstinence syndrome at birth (Chi-Square = 51.7(2), P alcohol in utero were at a significant risk of being born with low birth weight (Chi-Square = 8.8(2), P

  15. Prosocial coping and substance use during pregnancy.

    Science.gov (United States)

    Blechman, E A; Lowell, E S; Garrett, J

    1999-01-01

    In structured interviews of pregnant inner-city residents, 38 substance users reported more current liking of drugs and polysubstance use, disengagement coping, depressive symptoms, negative affect, and antisocial behavior than did 45 nonusers. During videotaped interviews, trained observers coded less warmth and less prosocial information exchange (e.g., self-disclosure, question asking) among users. Factor analysis of measures of coping and its concomitants yielded a three-factor (prosocial, antisocial, asocial) solution, with asocial and antisocial coping predominating among substance users. These results suggest that coping has emotional, social, and cognitive elements. This study is the first to demonstrate an association between a substance-using lifestyle and limited prosocial information exchange.

  16. Neural network application for illicit substances identification

    International Nuclear Information System (INIS)

    Nunes, Wallace V.; Silva, Ademir X. da; Crispim, Verginia R.; Schirru, Roberto

    2000-01-01

    Thermal neutron activation analysis is based on neutron capture prompt gamma-ray analysis and has been used in wide variety of fields, for examples, for inspection of checked airline baggage and for detection of buried land mines. In all of these applications, the detected γ-ray intensities from the elements present are used to estimate their concentrations. A study about application using a trained neutral network is presented to determine the presence of illicit substances, such as explosives and drugs, carried out in the luggages. The illicit substances emit characteristic detected γ-ray which are the fingerprint of each isotope. The fingerprint data-base of the gamma-ray spectrum of substances is obtained via Monte Carlo N-Particle Transport code, MCNP, version 4B. It was possible to train the neural network to determine the presence of explosives and narcotics even hidden by several materials. (author)

  17. Problems of substance abuse: exploitation and control.

    Science.gov (United States)

    Ray, L

    1985-01-01

    The notion of substance abuse is highly problematic. There is considerable disagreement amongst 'experts' as to the relative hazards and addictive properties of both legally and illegally available substances. There are also widely divergent sub-cultural attitudes to the harmfulness or benefit of drug use. One can assume no social consensus as to the nature of the contemporary 'drug problem', nor about the most appropriate means of dealing with it. There is, however, considerable evidence that criminalization of drug use, and harsh penalties against users and suppliers, are ineffective and counter-productive. Other models of control need to be considered, and in particular the merits and de-merits of the medicalization of drug abuse require examination. However, this is only one aspect of the problem. On the other side are the national and international corporations and syndicates, both legitimate and criminal, that earn vast profits from trade in toxic substances. Tobacco is legally available in every country in the world, and the industry is rarely subject to strict control. Thus the issue of substance abuse and control should be seen in a global context, in which account is taken of both legitimate and underworld operations. In attempts to control international trade in toxic substances, the limited success and the problems of already existing legal controls should be acknowledged. Local awareness and regulation of trade in substances is essential, but not sufficient. Amongst other avenues to be explored is the possibility of diverting presently illicitly grown narcotics into indigenous pharmaceutical industries in the Third World. Some problems with this strategy are noted.(ABSTRACT TRUNCATED AT 250 WORDS)

  18. Personality Traits of Substance Users in Bangladesh

    Directory of Open Access Journals (Sweden)

    Jotirmoy Roy

    2011-02-01

    Full Text Available Background: Drug taking behavior and drug dependence is a multi-factorial disorder. Personality is a very important determining factor of drug dependence. Objectives: To find out the possible relationship between personality traits and substance use disorders. Methods: This was a descriptive, cross-sectional and case-control study conducted in the department of Psychiatry of Bangabandhu Sheikh Mujib Medical University and Central Drug Addiction Treatment Center, Dhaka for a period of one year (January 2005 to December 2005. From five hundred respondents, 250 had the history of substance use disorders selected as case, and equal number were age, sex, habitat and economic background matched controls were taken. Personality traits of both cases and control were measured by applying Eysenck Personality Questionnaire. Results: Mean ± SD psychoticism (8.42±3 vs 4.33±1.8, Neuroticism (11.89±2.3 vs 9.83±2 were significantly higher (P<0.01 in cases than controls. It was found that psychoticism was 2.3 times and neurticism was 1.7 times higher in substance users than that of controls. There were no significant differences of mean distribution of extroversion and lie scales among the cases & controls. This study also revealed that, there was no significant relationship between personality traits and different variables related to substance use except that psychoticism was significantly higher in those substance users who had have positive history of troubles with law than those having no history of trouble with law (8.82±3.2 & 7.95±2.7 respectively. Conclusion: Personality traits may have an influence on persons with substance use disorder which detoriates quality of life. Key words: Drug dependence; Personality; Psychoticism; Neuroticism; Extraversion; Lie scale. DOI: 10.3329/bsmmuj.v3i2.7056BSMMU J 2010; 3(2: 76-81

  19. Global issues in volatile substance misuse.

    Science.gov (United States)

    Dell, Colleen Anne; Gust, Steven W; MacLean, Sarah

    2011-01-01

    This special issue of Substance Use & Misuse addresses the public health issue of volatile substance misuse (VSM), the inhalation of gases or vapors for psychoactive effects, assessing the similarities and differences in the products misused, patterns, prevalence, etiologies, and impacts of VSM by examining it through sociocultural epidemiology, neuroscience, and interventions research. The Canadian, US, and Australian guest editors contend that, when compared with other drugs used at a similar prevalence, VSM has attracted relatively little research effort. The authors and editors call for further research to develop evidence-based policies and comprehensive interventions that respect culture and context-specific knowledge.

  20. Substance misuse prevention as corporate social responsibility.

    Science.gov (United States)

    Radacsi, Gergely; Hardi, Peter

    2014-03-01

    All sectors of society should be involved in reducing substance misuse, including businesses. However, the business sector is typically involved only to the extent that their products compel them to be (e.g., alcohol producers promoting responsible alcohol consumption). This article examines why business participation has been limited and how embedding prevention within a framework of health promotion could increase participation. It reviews both Hungarian and international cases, concluding that although corporate social responsibility (CSR) offers a framework to approach substance misuse reduction, a different perception of the role of the business sector is necessary to make it viable.

  1. Analysis of standard substance human hair

    International Nuclear Information System (INIS)

    Zou Shuyun; Zhang Yongbao

    2005-01-01

    The human hair samples as standard substances were analyzed by the neutron activation analysis (NAA) on the miniature neutron source reactor. 19 elements, i.e. Al, As, Ba, Br, Ca, Cl, Cr, Co, Cu, Fe, Hg, I, Mg, Mn, Na, S, Se, V and Zn, were measured. The average content, standard deviation, relative standard deviation and the detection limit under the present research conditions were given for each element, and the results showed that the measured values of the samples were in agreement with the recommended values, which indicated that NAA can be used to analyze standard substance human hair with a relatively high accuracy. (authors)

  2. Nutrients and bioactive substances in aquatic organisms

    International Nuclear Information System (INIS)

    Devadasan, K.; Mukundan, M.K.; Antony, P.D.; Viswanathan Nair, P.G.; Perigreen, P.A.; Joseph, Jose

    1994-01-01

    The International Symposium on Nutrients and Bioactive Substances in Aquatic Organisms, was held during 16-17 September 1993 by the Society of Fisheries Technologists (India) to review the progress of research in this area in India and elsewhere. The papers presented indicate that scientific productivity in this field is substantial and that some of the bioactive materials isolated from aquatic organisms have potential application in human health, nutrition and therapy. The symposium focussed attention on toxicants, nutrients and bioactive substances in aquatic organisms in general, and also on pollution of aquatic systems due to thermal effluents. Paper relevant to INIS database is indexed separately. (M.K.V.)

  3. Hematological Parameters in the Volatile Substance Sniffers

    OpenAIRE

    Dündaröz, Ruşen; Ceylan, Süleyman; Denli, Metin; Açıkel, Cengizhan; Balım, Elvan; Özışık, Tahir

    2009-01-01

    SüleymanDemirel Üniversitesi TIP FAKÜLTESİ DERGİSİ: 1999 Eylül; 6(3) Hematological Parameters in the Volatile Substance Sniffers Ruşen Dündaröz, Süleyman Ceylan, Metin Denli, Cengiz Han Açıkel, Elvan Balım, Tahir Özışık Abstract Glue sniffing is a frequent problem among teenagers. Various chemical substances, especially toluene and benzene, contained in the glues kave been reported to be hematotoxic. The hematological parameters of 44 healthy teenagers ~...

  4. Social dimensions of adolescent substance use.

    Science.gov (United States)

    Sutherland, I; Shepherd, J P

    2001-03-01

    The aim of this study was to explore in detail the relationship between various social aspects of young people's lives and substance use and differences in the degree of influence exerted by the different social factors as a function of age. Design, setting, participants. The study was a survey of pupils aged 11-16 in a stratified sample of five English schools. Data from 4516 participants were obtained in relation to their cigarette, alcohol and illicit drug use and their contact with the police, perceived academic achievements and future expectations, religious beliefs, family structure, the importance of family versus peer opinions and suspension from school. Cumulative, age-specific preferences of substance misuse were compared. Logistic regression was used to rank the various risk factors. Substantial differences were found between substance users and non-users and the various risk factors being examined. For example, of those who had only been in trouble with the police, 18.8% used illegal drugs compared with 1.6% of those who had not had a police contact and who had no other risk factors. Many of these relationships were age-sensitive. For instance, the negative relationship between belief in God and illicit drug use became stronger as age increased (non-believers: y = 8.1886x - 9.16 R(2) = 0.9484; believers: y = 5.1514x - 8.08 R(2) = 0.9247). These results suggest that, within this sample of English adolescents, there was a strong relationship between substance use and the social factors examined. Although there were differences depending upon whether cigarette, alcohol or illicit drug use was being modelled, logistic regression indicated that the social factors could be ranked in the following order of importance: concurrent use of the second and third substances, having been in trouble with the police, perceived poor academic performance and low future academic expectations, a lack of religious belief, coming from a non-intact family, favouring peer over

  5. Determination of substances by radiothermometric titration

    International Nuclear Information System (INIS)

    Tolgyessy, J.; Lesny, J.

    1976-01-01

    For determination, nitrogen is bubbled through a solution containing radioactive Kr, Xe, Rn or another aerogen in addition to the substance determined. A continuous or intermittent addition of the titrating solution results in the release of reaction heat, thus increasing the temperature of the reaction mixture, which releases a radioactive gas. Upon reaching the equivalence point, the cold titrating reagent cools the reaction mixture, thus reducing the radioactive substance release. The equivalence point lies at the point of intersection of the extended linear parts of the curve of the dependence of released radioactivity on the volume of the titrating solution added. (M.K.)

  6. UN ANÁLISIS DE LAS PRINCIPALES REFORMAS Y RESULTADOS DEL SISTEMA DE PENSIONES DE MÉXICO DESDE LOS ORÍGENES DEL SISTEMA DE CAPITALIZACIÓN: HACIA LA RESILIENCIA

    Directory of Open Access Journals (Sweden)

    Juan Manuel Menéndez Blanco

    2016-06-01

    Full Text Available El cambio del sistema de pensiones de México basado en el reparto y el principio de solidaridad intergeneracional hacia otro basado en la capitalización tiene su origen en un contexto en el que, además de retos demográficos, sociales y laborales no resueltos, la insuficiencia de ahorro interno -y volatilidad del externo- de la economía mexicana es la principal restricción para el crecimiento económico. El objetivo de este artículo es revisar el diseño institucional del nuevo sistema, exponer sus pilares fundamentales y valorar los principales resultados desde su inicio. Para ello, utilizando bases de datos oficiales de instituciones de la Seguridad Social mexicana y de la OCDE, para el periodo 1995-2015, se analizan los principales indicadores de la dimensión, cobertura y situación del sistema de pensiones, sus recursos asignados, gastos y financiación, así como indicadores específicos de las Administradoras de Fondos. Las principales conclusiones obtenidas se refieren a la necesidad de reducir la economía sumergida incentivando la adhesión de trabajadores a alguno de los sistemas, abordar de una forma estructural los cambios demográficos, simplificar y homogenizar el entramado institucional y legal del sistema de pensiones y potenciar la industria financiera de México a través de un mayor dinamismo de las administradoras de fondos y los fondos de pensiones. The change in the Mexico´s pension system towards a capitalization pension system has its origin in a context of unresolved demographic, social and labor challenges, insufficient domestic saving -and volatility of the external- of the Mexican economy as the main factors constraining economic growth. The aim of this article is to review the institutional design of the new pension system, exposing its pillars and assess the main results. To do this, using official databases of the Mexico´s Social Security and OECD for the period 1995-2015, the main indicators of the size

  7. Playing Video Games While Using or Feeling the Effects of Substances: Associations with Substance Use Problems

    Directory of Open Access Journals (Sweden)

    Geoffrey L. Ream

    2011-10-01

    Full Text Available This study tested the hypothesis that playing video games while using or feeling the effects of a substance—referred to herein as “concurrent use”—is related to substance use problems after controlling for substance use frequency, video gaming as an enthusiastic hobby, and demographic factors. Data were drawn from a nationally representative online survey of adult video gamers conducted by Knowledge Networks, valid n = 2,885. Problem video game playing behavior was operationalized using Tejeiro Salguero and Bersabé Morán’s 2002 problem video game play (PVP measure, and measures for substance use problems were taken from the National Survey of Drug Use and Health (NSDUH. Separate structural equation modeling analyses were conducted for users of caffeine, tobacco, alcohol, and marijuana. In all four models, concurrent use was directly associated with substance use problems, but not with PVP. Video gaming as an enthusiastic hobby was associated with substance use problems via two indirect paths: through PVP for all substances, and through concurrent use for caffeine, tobacco, and alcohol only. Results illustrate the potential for “drug interaction” between self-reinforcing behaviors and addictive substances, with implications for the development of problem use.

  8. Playing Video Games While Using or Feeling the Effects of Substances: Associations with Substance Use Problems

    Science.gov (United States)

    Ream, Geoffrey L.; Elliott, Luther C.; Dunlap, Eloise

    2011-01-01

    This study tested the hypothesis that playing video games while using or feeling the effects of a substance—referred to herein as “concurrent use”—is related to substance use problems after controlling for substance use frequency, video gaming as an enthusiastic hobby, and demographic factors. Data were drawn from a nationally representative online survey of adult video gamers conducted by Knowledge Networks, valid n = 2,885. Problem video game playing behavior was operationalized using Tejeiro Salguero and Bersabé Morán’s 2002 problem video game play (PVP) measure, and measures for substance use problems were taken from the National Survey of Drug Use and Health (NSDUH). Separate structural equation modeling analyses were conducted for users of caffeine, tobacco, alcohol, and marijuana. In all four models, concurrent use was directly associated with substance use problems, but not with PVP. Video gaming as an enthusiastic hobby was associated with substance use problems via two indirect paths: through PVP for all substances, and through concurrent use for caffeine, tobacco, and alcohol only. Results illustrate the potential for “drug interaction” between self-reinforcing behaviors and addictive substances, with implications for the development of problem use. PMID:22073023

  9. Australian athletes' knowledge of the WADA Prohibited Substances List and performance enhancing substances.

    Science.gov (United States)

    Orr, Rhonda; Grassmayr, Matthew; Macniven, Rona; Grunseit, Anne; Halaki, Mark; Bauman, Adrian

    2018-03-15

    This study investigated athlete knowledge of the World Anti-doping Agency (WADA) Prohibited Substances List and the effects of four well-known performance enhancing substances (PES). A sample of 1925 elite and sub-elite athletes (mean age 20.6 years) completed a questionnaire about the banned status of 30 substances/methods and their knowledge of the effects of amphetamines, anabolic steroids, growth hormone and erythropoietin. Athletes showed limited understanding of the WADA Prohibited Substances List, scoring 32.2% correct, 36.3% incorrect, and 31.4% indicated they did not know the status of 30 substances. Responses of >50% correct were given for only eight substances/method: anabolic steroids, amphetamines, blood doping, erythropoietin, caffeine, vitamins/minerals, protein powders and iron. Athletes demonstrated moderate knowledge of the desired effects of the four PES (49% correct), but poor knowledge of their adverse effects (29% correct). Age, sex, ethnicity, professional/amateur status, and current competition level were significant predictors of the number of correct responses (r 2  = 0.16, p wide range of substances and PES. Better targeted drug education towards younger and non-professional athletes and evaluation of current anti-doping programs are warranted. Copyright © 2018 Elsevier B.V. All rights reserved.

  10. Methane. [biosynthesis from manure or analogous substance

    Energy Technology Data Exchange (ETDEWEB)

    Ducellier, G L.R.; Isman, M A

    1949-04-19

    CH/sub 4/ is produced by the fermentation of manure or analogous substances in a vat having a dome covering the vat, the lower edge of the dome being immersed in a liquid seal, and the dome being arranged to rise vertically in order to hold the CH/sub 4/ produced.

  11. [Domestic violence, alcohol and substance abuse].

    Science.gov (United States)

    Zilberman, Monica L; Blume, Sheila B

    2005-10-01

    Domestic violence and substance abuse are common in primary care patients. Although these problems are associated with severe physical and psychological sequelae, they are often undiagnosed. This article provides an overview of the prevalence of these problems, the health-related consequences for adults, children and elderly, as well as the challenges for clinicians in screening, assessment and referral.

  12. Antimicrobial substances produced by bacteria isolated from ...

    African Journals Online (AJOL)

    SERVER

    2007-08-06

    Aug 6, 2007 ... We report here the preliminary antimicrobial activity of substances produced by Bacillus subtilis NB-6. (air flora isolate) ... Key words: Antimicrobial activity, Bacillus, Burkholderia, Corynebacterium, methicillin-resistant Staphylococcus aureus. .... products contaminated with animal MRSA is very plausible ...

  13. PATTERNS OF SUBSTANCE ABUSE AMONG KENYAN STREET ...

    African Journals Online (AJOL)

    A sample of 50 (36 male and 14 female) street children currently in a remand home at Kabete in Nairobi, Kenya, were interviewed using a predesigned questionnaire in order to estimate prevalence rates for use of selected substances. The lifetime prevalence rates of the drugs most commonly used were volatile ...

  14. Addressing Trauma in Substance Abuse Treatment

    Science.gov (United States)

    Giordano, Amanda L.; Prosek, Elizabeth A.; Stamman, Julia; Callahan, Molly M.; Loseu, Sahar; Bevly, Cynthia M.; Cross, Kaitlin; Woehler, Elliott S.; Calzada, Richard-Michael R.; Chadwell, Katie

    2016-01-01

    Trauma is prevalent among clients with substance abuse issues, yet addictions counselors' training in trauma approaches is limited. The purpose of the current article is to provide pertinent information regarding trauma treatment including the use of assessments, empirically supported clinical approaches, self-help groups and the risk of vicarious…

  15. Maternal Employment and Early Adolescent Substance Use.

    Science.gov (United States)

    Hillman, Stephen B.; Sawilowsky, Shlomo S.

    1991-01-01

    Examined effects of maternal employment on use of alcohol, cigarettes, marijuana, and other drugs by ninth graders (n=48). Comparison of maternal employment patterns (full-time versus part-time versus not employed outside the home) indicated no significant differences in substance use behavior among adolescents. Findings support literature on…

  16. Hierarchy of controls applied to dangerous substances

    NARCIS (Netherlands)

    Terwoert, J.

    2014-01-01

    Too often, measures to control workers’ exposure to dangerous substances are taken on an ‘ad-hoc’ basis. Existing processes, procedures and routines are taken for granted, and ‘end-of-pipe’ solutions are installed. In many cases, one relies on the use of personal protective equipment. This may lead

  17. Substance Abuse Among Female Senior Secondary School ...

    African Journals Online (AJOL)

    Objective: To study the prevalence of substance abuse among female secondary school students in Anambra State. Design: This is a cross sectional study. Materials and Methods: A pre-tested structured questionnaire was used to obtain information on smoking, use of sedatives and alcohol drinking habits from 725 ...

  18. Toxicity of 56 substances to trees

    DEFF Research Database (Denmark)

    Clausen, Lauge Peter Westergaard; Trapp, Stefan

    2017-01-01

    Toxicity data of substances to higher plants is needed for the purpose of risk assessment, site evaluation, phytoremediation, and plant protection. However, the results from the most common phytotoxicity tests, like the OECD algae and Lemna test, are not necessarily valid for higher terrestrial...

  19. substances by Bacillus thuringiensis BAR 3

    African Journals Online (AJOL)

    DR CHARLES O.NWUCHE;Prof. A. R. Popoola

    substances were achieved when the basal medium (3 g/L beef extract, 5g/L peptone and .... room temperature with constant agitation at 160 ... the culture medium was tested by a modification ... to 100oC for 2 min for enzyme inactivation.

  20. Psilocybin for treating substance use disorders?

    OpenAIRE

    Veen, B.T. de; Schellekens, A.F.A.; Verheij, M.M.M.; Homberg, J.R.

    2017-01-01

    INTRODUCTION: Evidence based treatment for Substance use disorders (SUD) includes psychotherapy and pharmacotherapy. However, these are only partially effective. Hallucinogens, such as psilocybin, may represent potential new treatment options for SUD. This review provides a summary of (human) studies on the putative therapeutic effects of psilocybin, and discusses the receptor systems, brain regions and cognitive and emotional processes mediating psilocybin's effects. Psilocybin's chemical st...

  1. Apparatus for carbonizing bituminous substances, etc

    Energy Technology Data Exchange (ETDEWEB)

    Meguin, A G

    1921-06-24

    A process is disclosed of carbonizing bituminous substances such as coal, or shale, at a low temperature, the distinguishing feature being that during the gas-distillation period, the material is subjected to centrifugal action in a rotary drum or retort is distributed over the whole circumference of the drum and is at the same time compressed.

  2. Treatment of substance use disorders in schizophrenia.

    Science.gov (United States)

    Bennett, Melanie E; Bradshaw, Kristen R; Catalano, Lauren T

    2017-07-01

    Substance use disorders (SUDs) represent a great barrier to functional recovery for individuals with schizophrenia. It is important to use research on treatment of SUDs in schizophrenia to guide treatment recommendations and program planning. We review studies of pharmacological and psychosocial interventions to treat SUDs in individuals with schizophrenia. The criteria used to select studies for inclusion are (1) the percentage of the sample with a schizophrenia spectrum diagnosis is at least 25%; (2) participants have a comorbid SUD or problem use of substances; (3) an intervention for SUD is provided; (4) a substance use-related outcome is measured; and (5) the study design enabled examination of pre-post outcome measures including open label trials, nonrandomized evaluations (quasi-experimental designs, nonrandom assignment to groups), or randomized controlled trials. There are few psychopharmacology outcomes studies. Most have examined use of antipsychotic medications to treat SUDs in schizophrenia. Several trials have yielded positive findings for naltrexone in reducing drinking compared to placebo in this population. Motivational and cognitive-behavioral interventions are associated with decreased substance use in several trials. Treatment for SUDs is feasible within a range of settings and acceptable to many individuals with schizophrenia. All individuals with schizophrenia should be offered brief or more extended psychosocial interventions that incorporate discussion of personal reasons to change and training in cognitive-behavioral strategies to reduce use, cope with cravings and stress, and avoid relapse. Future research must include larger samples, longitudinal designs, and similar outcome measures across studies.

  3. Substance P in human cerebrospinal fluid

    International Nuclear Information System (INIS)

    Wallasch, T.M.

    1987-01-01

    Using a combined method of reversed-phase, high-pressure liquid chromatography and RIA, the author was able to isolate the neuropephide substance P from human cerebrospinal fluid and to make a quantitative measurement. The rp-HPLC-RIA method was found to be superior to other methods. (MBC) [de

  4. Interaction of acetamiprid with extracellular polymeric substances ...

    African Journals Online (AJOL)

    Extracellular polymeric substances (EPS) are important components of activated sludge and it plays an important role in removing pollutants. The interaction between EPS and organic pollutants is still little known. In the present study, the interaction of soluble/bound EPS with acetamiprid, a neonicotinoid insecticide, was ...

  5. Public perceptions of behavioral and substance addictions.

    Science.gov (United States)

    Lang, Brent; Rosenberg, Harold

    2017-02-01

    Most of the research on public perceptions of people with addictive disorders has focused on alcohol and illicit drugs, rather than addiction to behavioral activities. To expand the range of addictive behaviors and types of perceptions studied, we designed the present study to assess the lay public's definitions of and willingness to affiliate with people described as addicted to 1 of 2 specific behaviors (i.e., pornography or gambling) or 1 of 3 specific substances (i.e., alcohol, marijuana, or heroin). A nationwide convenience sample (N = 612) of American adults completed online questionnaires during the summer of 2015. Participants rated heroin as more addictive than the other drugs and behaviors and, despite differences among the conditions, were generally unwilling to affiliate with an individual addicted to any of the 2 behaviors or 3 substances. When asked to rate different potential indications of addiction, participants endorsed behavioral signs of impaired control and physiological and psychological dependence as more indicative of all 5 types of addiction than desire to use the substance or engage in the addictive behavior. Despite recent efforts to increase public knowledge about addictive disorders, members of the public continue to endorse some attitudes indicative of stigmatization toward people with selected substance and behavioral addictions. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

  6. Prenatal Maternal Substance Use and Offspring Outcomes

    NARCIS (Netherlands)

    Huizink, A.C.

    2015-01-01

    Evidence from both human and preclinical studies seems to indicate that maternal smoking, alcohol drinking, or other drug use during pregnancy can affect offspring outcomes. It also suggests that maternal substance use during pregnancy is a major preventable cause of adverse infant outcomes.

  7. Lichen substances prevent lichens from nutrient deficiency.

    Science.gov (United States)

    Hauck, Markus; Willenbruch, Karen; Leuschner, Christoph

    2009-01-01

    The dibenzofuran usnic acid, a widespread cortical secondary metabolite produced by lichen-forming fungi, was shown to promote the intracellular uptake of Cu(2+) in two epiphytic lichens, Evernia mesomorpha and Ramalina menziesii, from acidic, nutrient-poor bark. Higher Cu(2+) uptake in the former, which produces the depside divaricatic acid in addition to usnic acid, suggests that this depside promotes Cu(2+) uptake. Since Cu(2+) is one of the rarest micronutrients, promotion of Cu(2+) uptake by lichen substances may be crucial for the studied lichens to survive in their nutrient-poor habitats. In contrast, study of the uptake of other metals in E. mesomorpha revealed that the intracellular uptake of Mn(2+), which regularly exceeds potentially toxic concentrations in leachates of acidic tree bark, was partially inhibited by the lichen substances produced by this species. Inhibition of Mn(2+) uptake by lichen substances previously has been demonstrated in lichens. The uptake of Fe(2+), Fe(3+), Mg(2+), and Zn(2+), which fail to reach toxic concentrations in acidic bark at unpolluted sites, although they are more common than Cu(2+), was not affected by lichen substances of E. mesomorpha.

  8. Binding of cationic surfactants to humic substances

    NARCIS (Netherlands)

    Ishiguro, M.; Tan, W.; Koopal, L.K.

    2007-01-01

    Commercial surfactants are introduced into the environment either through waste products or site-specific contamination. The amphiphilic nature of both surfactants and humic substances (HS) leads to their mutual attraction especially when surfactant and HS are oppositely charged. Binding of the

  9. [Profile of psychoactive substances consumption in workplace].

    Science.gov (United States)

    Bœuf-Cazou, Olivia; Lapeyre-Mestre, Maryse; Niezborala, Michel; Montastruc, Jean-Louis

    2011-01-01

    The aim of this study was to identify profiles of psychoactive substances consumers among workers according to their professional characteristics. In 2006, 2213 workers participated in "Mode de Vie et Travail" (Drugs and Work) cross-sectional survey. Data were collected by a self-administered questionnaire concerning general and professional characteristics and the consumption of psychoactive substances (psychoactive drugs, tobacco, alcohol and cannabis) during the professional medical visit. We identified consumer profiles with a hierarchical ascendant classification as statistical method. We underlined five profiles associated with psychoactive substance consumption: (1) alcohol consumers in the workplace were sales engineers satisfied with their employment, (2) alcohol consumers after their work were not satisfied with their lives, (3) cannabis consumers were men professionally satisfied but suffering from job insecurity, (4) smokers were workers with professional responsibilities under time pressure, and finally (5) poly-consumers had strong professional constraints. This study guides occupational physicians on psychoactive substances consumption among a worker population. © 2011 Société Française de Pharmacologie et de Thérapeutique.

  10. A Study on Substance Abuse Prevention

    Science.gov (United States)

    Seçim, Gürcan

    2017-01-01

    This study aims to examine options to increase the supportive power of parents, teachers, school administrators, and counselors who directly interact with children and adolescents and have a fundamental responsibility to protect them from the risks of substance abuse and evaluate the effectiveness of associated training programs. The study design…

  11. An action plan for radioactive substances regulation

    International Nuclear Information System (INIS)

    1998-01-01

    This document sets out an action plan for the Agency's Radioactive Substances Regulation function. Our vision is to secure continuous improvement in the protection of the public and the environment from the harmful effects of radioactive substances. Radioactive Substances Regulation will work with others to realise this vision and contribute to the Agency's role in achieving sustainable development. We will also work to ensure that the Agency achieves its objectives in an efficient, consistent and integrated way. The main elements of our Action Plan are as follows: establishing indicators of sustainability and the means and methods of monitoring them; establishing performance indicators and a programme of targets and objectives to be achieved; establishing a database of all premises subject to RSA93 and to use it for work planning, resource targeting, and improvement to radioactive waste management; provision of systems of procedures and technical guidance to ensure nationally consistent and cost- effective regulation; establishing systems to audit the implementation of the procedures and guidance; ensuring quality of regulation by defining technical competencies of inspectors and the training programmes to secure them; an R and D programme targeted on improving radioactive waste management and radioactive substances regulation; and full and effective participation in development of national policy

  12. Sociodemographic and substance use correlates of repeated ...

    African Journals Online (AJOL)

    EB

    2013-09-03

    Sep 3, 2013 ... Substance abuse affects above 50 million people worldwide. Abuse of legally ... use alcohol while 57% of the male and 10.8% of the female drug users ..... the contradictions of addiction. Behav and Brain Sc. 1996; 19: 561-74.

  13. Análisis de contenido de los cibermedios generalistas españoles. Características y adscripción temática de las noticias principales de portada

    OpenAIRE

    Odriozola-Chéné, J. (Javier)

    2012-01-01

    El objetivo de este artículo es describir la agenda temática de una serie de cibermedios españoles generalistas. Así, por medio de un análisis de contenido cuantitativo, se estudia qué temas son los más relevantes dentro de las principales noticias de portada de los medios analizados, en función de determinados aspectos: la autoría, el ámbito geográfico, las fuentes informativas o el desarrollo de las informaciones en la portada. Además, este trabajo permite establecer las características bás...

  14. La gestión de la calidad en Perú: un estudio de la norma ISO 9001, sus beneficios y los principales cambios en la versión 2015

    Directory of Open Access Journals (Sweden)

    Edmundo Lizarzaburu Bolaños

    2016-02-01

    Full Text Available Debido a la gran relevancia que tiene la gestión de calidad en la actual coyuntura internacional, el presente trabajo de investigación revisa y analiza la más destacada norma en esta materia: la ISO 9001. En el documento, se establecen los orígenes y la evolución del término calidad. Este se define mediante la descripción de la familia de normas. Se identifican también su estructura y los principios sobre los que se basa. A partir de lo anterior, como un resultado adicional del trabajo, se detallan los beneficios cualitativos y cuantitativos que la norma brinda a las empresas que se adscriben a la misma. Por último, se establecen las principales modificaciones que incorporara la nueva ISO 9001 versión 2015.

  15. Production of chemical substances in Tajikistan

    International Nuclear Information System (INIS)

    Boboev, Kh.E.; Nazarov, K.M.

    2010-01-01

    Full text: Government of the Republic of Tajikistan has signed Convention "On prohibition of chemical weapon application"and no chemical weapon (CHW) is produced on the territory of republic. However, the potential production of CHW by individual persons or groups can be organized, using available production and obtaining chemical substances from other countries. Chemical substances, which have strong damage effect, easily, can be synthesized in chemical laboratories. These are general toxic substances, as hydrocyanic acid acid, phosgene, mustard gas, lewisite, sarin and others. The similar chemical substances of industrial significance are produced in Tajikistan: ammonia, chlorine, explosives, caustic soda, carbamide, formaldehyde and others. For industrial needs and agriculture from other countries Tajikistan is receiving the following: sodium cyanide and potassium for gold-mining; mineral acids; pesticides and others. Besides, there are different deposits in Tajikistan, reprocessing of which gives an opportunity to obtain different chemical substances. What can be obtained from chemicals produced in Tajikistan? Chlorine - from this reagent the fluoride chlorine, phosgene COCl_2 and many other compounds are easily synthesized, which are CHW components. Obtained cyanic compounds for gold mining can be used as precursor for neuroparalytic action. A big amount of metallic aluminum is produced in the republic. The Al powder for rocket fuel can be obtained from it. Obtained from other countries pesticides are potential components for CHW creation. A strong control and account of pesticides use is necessary. It is extremely important to control materials, equipment and technologies which allow countries and separate groups to create weapons of mass destruction (WMD). The most important factor is goods identification. Firstly - inspection of external view, labeling, packing specifications, license availability and etc. Strong control of checklists is necessary according

  16. [Comorbidity of substance use with mental disorders].

    Science.gov (United States)

    Leonidaki, V; Maliori, M

    2009-01-01

    This contribution reviews the international literature about dual diagnosis, meaning patients who have simultaneously mental health problems and substance use disorders and discusses epidemiology, clinical characteristics, but primarily etiopathogenesis and different treatment models and interventions. The epidemiological data coming from large-scale studies in the general population in USA, Australia and UK demonstrate the close relationship between mental health problems and substance use disorders. Also, the results from Greek research projects support this close relationship, but their research designs have significant limitations. Multiple and high risks are common in this population, like violent or suicidal behavior, self-harm, physical problems, while they appear less responsive to treatment. Subsequently, different models for etiopathogenesis of dual diagnosis have been suggested: (a) Causal relationship: secondary substance use disorder is subsequent of primary mental illness (self-medication hypothesis, supersenstivity model) or vice versa (alcohol, cannabis, and cocaine use trigger or contribute to development of mental illness). (b) Third factor as the cause of both mental and substance use disorders (genetic factor, neuropathology, traumatic experience, personality characteristics, multiple factors). (c) Comorbidty is due to chance. (d) Each disorder mutually exacerbates the other, regardless the cause. Here, the relationship between alcohol and depression is discussed further as example. The ideas and the research-evidence which support each of these models are presented. Also there is an overview of different treatment models: (a) Consecutive treatment: mental health treatment and substance misuse treatment are provided consecutively. (b) Parallel treatments: the patient attends programs of both mental health and substance use services simultaneously. (c) Integrated treatment: the same clinical team addresses both mental health issues and substance

  17. Hábitos de publicación y citación según campos científicos: Principales diferencias a partir de las revistas JCR

    Directory of Open Access Journals (Sweden)

    Dorta-González, Pablo

    2013-12-01

    Full Text Available Journals’ impact indicators are not comparable among scientific fields because of systematic differences in publication and citation habits. In this work, the impact factor was decomposed into five independent variables, as applied to journal category, fields, and areas considered in the databases of the leading provider of science indicators, Thomson Reuters. A Principal Component Analysis was employed to find the sources of the variance and a Cluster Analysis was used to detect similarities. In spite of systematic differences between disciplines, the principal components explain 78% of the total variance. From the statistical point of view, some categories of Science are closer to the Social Sciences than to Science and vice versa.Los indicadores de impacto de revistas no son comparables entre campos científicos debido a las diferencias significativas en los hábitos de publicación y citación. En este trabajo se presenta una descomposición del factor de impacto en cinco variables independientes. Esta descomposición se aplica a las categorías de revista, campos y áreas considerados en las bases de datos del principal proveedor de indicadores científicos, Thomson Reuters. Para localizar las fuentes de la varianza se emplea un Análisis de Componentes Principales y para detectar las semejanzas se utiliza un Análisis Cluster. A pesar de las diferencias sistemáticas entre disciplinas, las componentes principales explican el 78% de la varianza total. Existen categorías de Ciencias que están más próximas, desde el punto de vista estadístico, de algunas Ciencias Sociales que del resto de Ciencias y viceversa.

  18. Is it the music? Peer substance use as a mediator of the link between music preferences and adolescent substance use.

    Science.gov (United States)

    Mulder, Juul; Ter Bogt, Tom F M; Raaijmakers, Quinten A W; Nic Gabhainn, Saoirse; Monshouwer, Karin; Vollebergh, Wilma A M

    2010-06-01

    Both music preferences and the substance use behavior of peers are important elements in explaining adolescent substance use. The extent to which music preference and peer use overlap in explaining adolescent substance use remains to be determined. A nationally representative sample of 7324 Dutch school-going adolescents (aged 12-16) provided data on music preferences, substance use behaviors and perceived number of peers using substances. Factor analyses showed that preferences for eight music genres factored into four styles: Pop (chart music, Dutch pop), Adult (classical music, jazz), Urban (rap/hiphop, soul/R&B) and Hard (punk/hardcore, techno/hardhouse); substance use was indicated by smoking, drinking, and cannabis use. Structural equation modeling revealed that the relationship between music preference and substance use was either wholly or partially mediated by perceived peer use. Music can model substance use and fans of different types of music may select friends with use patterns that reinforce their own substance use inclinations.

  19. Social Cost of Substance Abuse in Russia.

    Science.gov (United States)

    Potapchik, Elena; Popovich, Larisa

    2014-09-01

    To summarize results of studies that estimate the social costs of alcohol, tobacco, and illicit drug abuse in Russia. The purpose of these studies was to inform policymakers about the real economic burden of risky behaviors and to provide conditions for evidence-based and well-informed decision making in this area. The cost-of-illness method was applied to estimate the social cost of substance abuse. The intangible cost was not included in estimation. A prevalence-based approach was applied to estimate the tangible cost. For the estimation of direct costs, a top-down method was used. Indirect costs were estimated using two methods: the human capital and the friction cost. In 2008, the social cost of substance abuse in Russia comprised 677.2 billion rubles if the friction cost method is applied and 1965.9 billion rubles if the human capital method is used. The social cost of substance abuse is defined to the greatest extent by alcohol consumption, comprising about 45% of the economic burden. Illicit drug use comprises about 30% of the economic burden and tobacco consumption 25%. The results of economic studies demonstrated that psychoactive substances impose a considerable economic burden on society. Analysis of the substance abuse social cost pattern shows that the main losses that society bears because of these behavioral risk factors fall outside the health care system and lay in other sectors of the economy such as social care, law enforcement, and productivity losses. Copyright © 2014 International Society for Pharmacoeconomics and Outcomes Research (ISPOR). Published by Elsevier Inc. All rights reserved.

  20. Doctor and pharmacy shopping for controlled substances.

    Science.gov (United States)

    Peirce, Gretchen L; Smith, Michael J; Abate, Marie A; Halverson, Joel

    2012-06-01

    Prescription drug abuse is a major health concern nationwide, with West Virginia having one of the highest prescription drug death rates in the United States. Studies are lacking that compare living subjects with persons who died from drug overdose for evidence of doctor and pharmacy shopping for controlled substances. The study objectives were to compare deceased and living subjects in West Virginia for evidence of prior doctor and pharmacy shopping for controlled substances and to identify factors associated with drug-related death. A secondary data study was conducted using controlled substance, Schedule II-IV, prescription data from the West Virginia Controlled Substance Monitoring Program and drug-related death data compiled by the Forensic Drug Database between July 2005 and December 2007. A case-control design compared deceased subjects 18 years and older whose death was drug related with living subjects for prior doctor and pharmacy shopping. Logistic regression identified factors related to the odds of drug-related death. A significantly greater proportion of deceased subjects were doctor shoppers (25.21% vs. 3.58%) and pharmacy shoppers (17.48% vs. 1.30%) than living subjects. Approximately 20.23% of doctor shoppers were also pharmacy shoppers, and 55.60% of pharmacy shoppers were doctor shoppers. Younger age, greater number of prescriptions dispensed, exposure to opioids and benzodiazepines, and doctor and pharmacy shopping were factors with greater odds of drug-related death. Doctor and pharmacy shopping involving controlled substances were identified, and shopping behavior was associated with drug-related death. Prescription monitoring programs may be useful in identifying potential shoppers at the point of care.

  1. Ingestion of caustic substances and its complications

    Directory of Open Access Journals (Sweden)

    Rui Celso Martins Mamede

    2001-01-01

    Full Text Available CONTEXT: Caustic substances cause tissue destruction through liquefaction or coagulation reactions and the intensity of destruction depends on the type, concentration, time of contact and amount of the substance ingested. OBJECTIVES: To analyze the complications in patients who ingested caustic substances and correlate them with the amount of caustic soda ingested. DESIGN: Retrospective study. SETTING: University hospital, a referral center. PARTICIPANTS: A total of 239 patients who ingested caustic soda. MAIN MEASUREMENTS: The amount of granulated caustic substance ingested was measured as tablespoonfuls and the following complications were analyzed: esophagitis, esophageal stenosis and progression to cancer, fistulas, perforations, stomach lesions, brain abscesses, and death. Stenosis was classified as mild, moderate or severe according to the radiological findings. RESULTS: We observed an 89.3% incidence of esophagitis; 72.6% of the cases involved progression to stenosis and 1% died during the acute phase. Stenosis was mild in 17.6% of cases, moderate in 59.3% and severe in 23%. The incidence of stenosis was 80.8% in women and 62.5% in men. The incidence of stenosis was 46.9% in the group that ingested "fragments" and 93.6% in the group that ingested one or more tablespoonfuls of caustic substances. Among subjects who ingested one or more tablespoonfuls, 32.2% developed lesions of the stomach-duodenum, whereas the ingestion of "fragments" was not sufficient to induce these lesions. There was no correlation between the intensity of lesions of the esophagus and of the stomach. Progression to cancer of the esophagus occurred in 1.8% of cases, death during the chronic phase in 1.4%, perforations in 4.6%, fistulas in 0.9%, and brain abscesses in 1.4%. CONCLUSIONS: The complications were related to the amount of caustic soda ingested. Small amounts caused esophagitis or stenosis and large amounts increased the risk of fistulas, perforations and

  2. Psychopathology in Substance Use Disorder Patients with and without Substance-Induced Psychosis

    Directory of Open Access Journals (Sweden)

    Simon Zhornitsky

    2015-01-01

    Full Text Available Background. Substance-induced psychotic disorder (SIPD is a diagnosis constructed to distinguish substance-induced psychotic states from primary psychotic disorders. A number of studies have compared SIPD persons with primary psychotic patients, but there is little data on what differentiates substance use disorder (SUD individuals with and without SIPD. Here, we compared psychopathology, sociodemographic variables, and substance use characteristics between SUD patients with and without SIPD. Methods. A retrospective chart review was conducted on newly admitted patients at a rehabilitation centre between 2007 and 2012. Results. Of the 379 patients included in the study, 5% were diagnosed with SIPD n=19 and 95% were diagnosed with SUDs without SIPD n=360. More SIPD patients reported using cannabis and psychostimulants, and fewer SIPD patients reported using alcohol than SUDs patients without SIPD. SIPD patients scored higher on the “schizophrenia nuclear symptoms” dimension of the SCL-90R psychoticism scale and exhibited more ClusterB personality traits than SUD patients without SIPD. Discussion. These data are consistent with previous studies suggesting that psychopathology, substance type, and sociodemographic variables play important role in the development of SIPD. More importantly, the results highlight the need for paying greater attention to the types of self-reported psychotic symptoms during the assessment of psychotomimetic effects associated with psychoactive substances.

  3. Substance use and treatment of substance use disorders in a community sample of transgender adults.

    Science.gov (United States)

    Keuroghlian, Alex S; Reisner, Sari L; White, Jaclyn M; Weiss, Roger D

    2015-07-01

    Transgender people have elevated substance use prevalence compared with the U.S. general population, however no studies have comprehensively examined the relationship of psychosocial risk factors to substance use and substance use disorder (SUD) treatment among both male-to-female (MTF) and female-to-male (FTM) transgender adults. Secondary data analysis of a 2013 community-based survey of transgender adults in Massachusetts (N=452) was conducted. Adjusted multivariable logistic regression models were fit to examine the relationship of four risk factor domains with SUD treatment history and recent substance use: (1) demographics; (2) gender-related characteristics; (3) mental health; (4) socio-structural factors. Adjusted Odds Ratios (aOR) and 95% Confidence Intervals (95% CI) were estimated. Ten percent of the sample reported lifetime SUD treatment. Factors associated with significant increase in odds of lifetime SUD treatment alongside recent substance use (all pdiscrimination (aOR=1.90; 95% CI=1.22-2.95), unstable housing (aOR=1.80; 95% CI=1.21-2.67), and sex work (aOR=2.48; 95% CI=1.24-4.95). Substance use and SUD treatment among transgender adults are associated with demographic, gender-related, mental health, and socio-structural risk factors. Studies are warranted that identify SUD treatment barriers, and integrate SUD treatment with psychosocial and structural interventions for a diverse spectrum of transgender adults. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  4. Recherche d'une eventuelle implication des substances ...

    African Journals Online (AJOL)

    . English Abstract. This study was conducted to determine the presence or absence of psychoactive substances in the urine of 105 patients admitted to the emergency of Abidjan Heart Institute. Indeed, these substances have been described as ...

  5. Substance Abuse and Prison Recidivism: Themes from Qualitative Interviews

    Science.gov (United States)

    Phillips, Lindsay A.

    2010-01-01

    This qualitative analysis explores the role of substance abuse in reentry from prison to society. Participants who recidivated (N = 20) in an urban prison system identified substance abuse as their primary reason for recidivism. Treatment implications are discussed.

  6. Interpersonal guilt and substance use in college students.

    Science.gov (United States)

    Locke, Geoffrey W; Shilkret, Robert; Everett, Joyce E; Petry, Nancy M

    2015-01-01

    The college years are a time for developing independence and separating from one's family, and they are also a time in which substance use often escalates. This study examined the relationships between use of substances and interpersonal guilt, an emotion that can arise from feelings about separation among college students. In total, 1865 college students completed a survey evaluating substance use and interpersonal guilt. Regular users of alcohol, cigarettes, cannabis, and other illicit drugs were compared with nonregular users of each substance. Sequential linear regression, controlling for confounding variables, examined relationships between regular use of each substance and scores on a guilt index. Risky drinkers and daily smokers had significantly more interpersonal guilt than their peers who did not regularly use these substances. In contrast, regular cannabis users had significantly less guilt than nonregular cannabis users. These data suggest that substance use among college students may be related to interpersonal guilt and family separation issues, and this relationship may vary across substances.

  7. Correlates of psychoactive substance use among Nigerian adolescents

    OpenAIRE

    Oluyemi O Akanni; Ehigiator O Adayonfo

    2015-01-01

    Context: The abuse of psychoactive substances which is one of the most important global public health problems begins in adolescence. Adolescents usually start by abusing the gateway substances. They suffer social, economic, physical, and legal consequences on account of use of substances, and this is very worrisome because of the increasing prevalence of use. Aims: The aim was to identify the characteristics of adolescents that use gateway substances. This knowledge shall be utilized in prev...

  8. [The substance experience, a history of LSD].

    Science.gov (United States)

    Beck, François; Bonnet, Nicolas

    2013-04-01

    This article reviews the recent knowledge on LSD stemming from various disciplines among which pharmacology, sociology and epidemiology. The d-lysergic acid diethylamide (LSD) is a particularly powerful hallucinogenic substance. It produces distortions and hearing, visual and tactile hallucinations. Rarely used (only 1.7% of people aged 15-64 years old have tried it in their lifetime), this very powerful drug generates a strong apprehension within the general population, but the ethnographical studies show that its image seems rather good among illicit drug users. This representation relies both on the proper effects of this substance and also on the history of LSD very closely linked to the counterculture characteristic of the years 1960-1970. © 2013 médecine/sciences – Inserm / SRMS.

  9. Emotional awareness in substance-dependent patients.

    Science.gov (United States)

    Carton, Solange; Bayard, Sophie; Paget, Virginie; Jouanne, Céline; Varescon, Isabelle; Edel, Yves; Detilleux, Michel

    2010-06-01

    We explored emotional awareness in substance-dependent patients and its relationships to self-reported alexithymia. Sixty-four outpatients with drug dependence or alcohol dependence were evaluated before the beginning of treatment with the Hamilton Depressive Scale and the Covi Anxiety Scale, and they completed the Toronto Alexithymia Scale (TAS-20) and the Levels of Emotional Awareness Scale (LEAS). Subjects exhibited low levels of emotional awareness and TAS-20 scores were high. Both measures were not related to depressive and anxious symptomatology. This research is the first to provide LEAS results with substance-dependent patients and highlights their deficits in emotions' differentiation and complexity. The lack of a relationship between LEAS and TAS-20 is discussed from the methodological and theoretical points of view. (c) 2010 Wiley Periodicals, Inc.

  10. Addiction: Alcohol and Substance Abuse in Judaism

    Directory of Open Access Journals (Sweden)

    Kate Miriam Loewenthal

    2014-09-01

    Full Text Available This article outlines a history of rulings and beliefs about addiction in Judaism, covering alcohol and substance use and addiction, in the context of a brief account of the development of the status of addiction. It examines the prevalence of alcohol and substance use and abuse among Jews, including a discussion of some of the difficulties in estimating prevalence and of factors involved in changing patterns of use and abuse. Community beliefs and attitudes are examined, using published material and interviews with community leaders and members. Some conclusions are suggested about the impact of religious rulings and of other factors on addiction among Jews. Attention is given to the phenomenon of denial. Therapeutic practices and organisations are described. The scope for further research is identified.

  11. Supervisory Turnover in Outpatient Substance Abuse Treatment

    Science.gov (United States)

    Knight, Danica K.; Broome, Kirk M.; Edwards, Jennifer R.; Flynn, Patrick M.

    2009-01-01

    Staff turnover is a significant issue within substance abuse treatment, with implications for service delivery and organizational health. This study examined factors associated with turnover among supervisors in outpatient substance abuse treatment. Turnover was conceptualized as being an individual response to organizational-level influences, and predictors represent aggregate program measures. Participants included 532 staff (including 467 counselors and 65 clinical/program directors) from 90 programs in four regions of the USA. Using logistic regression, analyses of structural factors indicated that programs affiliated with a parent organization and those providing more counseling hours to clients had higher turnover rates. When measures of job attitudes were included, only parent affiliation and collective appraisal of satisfaction were related to turnover. Subsequent analyses identified a trend toward increased supervisory turnover when satisfaction was low following the departure of a previous supervisor. These findings suggest that organizational-level factors can be influential in supervisory turnover. PMID:19949883

  12. [Psychoactive substance use during pregnancy: a review].

    Science.gov (United States)

    Lamy, S; Thibaut, F

    2010-02-01

    All around the world, the potential consequences of the increasing use of psychoactive substances during pregnancy are a major public health concern. It is estimated that 20 to 30% of pregnant women use tobacco, 15% use alcohol, 3 to 10% use cannabis and 0.5 to 3% use cocaine. The estimation of tobacco consumption during pregnancy is better known as compared with alcohol and substance use prevalence during pregnancy, which remains under estimated or unknown. For example, in France, the prevalence of cannabis and cocaine use during pregnancy is unknown. In general, the prevalence of drug or alcohol use during pregnancy is estimated by extrapolating data from epidemiological studies conducted in the general population (in France or in other countries). However, drug or alcohol use in the general population may dramatically vary from one country to another. Even if some studies have reported the prevalence of alcohol or substance use in different countries around the world, most of them were based on the mother's interview. In most cases, the mother did not report exactly the amount of drugs or alcohol used. Further studies measuring alcohol or substance use in the mother's blood, hair or in the newborn's meconium are needed. In addition, different methodologies have been used in the literature (different types of interview, with or without biological measurements; different subjects included (in- or out-pregnant women, psychiatric comorbidities or not, different economic status, etc). Despite these methodological biases, the prevalence of drug or alcohol use increases in pregnant women, and in most cases, several drugs are associated. Most of the studies have used structured or semi-structured interviews such as the addiction severity index (ASI) or the alcohol use disorders identification test (AUDIT) to assess alcohol or drug consumption. In addition, the identification of risk factors for substance or alcohol use during pregnancy would allow the early detection of

  13. Addiction and substance abuse in anesthesiology.

    Science.gov (United States)

    Bryson, Ethan O; Silverstein, Jeffrey H

    2008-11-01

    Despite substantial advances in our understanding of addiction and the technology and therapeutic approaches used to fight this disease, addiction still remains a major issue in the anesthesia workplace, and outcomes have not appreciably changed. Although alcoholism and other forms of impairment, such as addiction to other substances and mental illness, impact anesthesiologists at rates similar to those in other professions, as recently as 2005, the drug of choice for anesthesiologists entering treatment was still an opioid. There exists a considerable association between chemical dependence and other psychopathology, and successful treatment for addiction is less likely when comorbid psychopathology is not treated. Individuals under evaluation or treatment for substance abuse should have an evaluation with subsequent management of comorbid psychiatric conditions. Participation in self-help groups is still considered a vital component in the therapy of the impaired physician, along with regular monitoring if the anesthesiologist wishes to attempt reentry into clinical practice.

  14. 77 FR 5848 - Manufacturer of Controlled Substances; Notice of Registration

    Science.gov (United States)

    2012-02-06

    ... October 7, 2011, 76 FR 62449, Johnson Matthey Inc., Custom Pharmaceuticals Department, 2003 Nolte Drive... substance listed in schedule II. The company plans to manufacture the listed controlled substance for sale... registration of Johnson Matthey Inc. to manufacture the listed basic class of controlled substance is...

  15. The Impact of Religiousness on Substance Use and Depression.

    Science.gov (United States)

    Uchendu, Cajetan

    This longitudinal study evaluated the effect of religiousness on substance use and depression both currently and after six months. It also evaluated the association between religious coping on substance use and depression both currently and after six months. Results reveal no relationship between religiousness and current substance use. There was…

  16. Substance abuse and HIV risk behaviours amongst primary health ...

    African Journals Online (AJOL)

    Substance abuse and HIV risk behaviours amongst primary health care service users in Cape Town. ... African Journal of Psychiatry ... We assessed substance use with the Alcohol, Smoking and Substance Involvement Screening Test, and HIV risk with items addressing injection drug use, blood-sharing rituals, and sexual ...

  17. Linking Substance Use and Problem Behavior across Three Generations

    Science.gov (United States)

    Bailey, Jennifer A.; Hill, Karl G.; Oesterle, Sabrina; Hawkins, J. David

    2006-01-01

    This study examined patterns of between-generation continuity in substance use from generation 1 (G1) parents to generation 2 (G2) adolescents and from G2 adult substance use and G1 substance use to generation 3 (G3) problem behavior in childhood. Structural equation modeling of prospective, longitudinal data from 808 participants, their parents,…

  18. 49 CFR 392.4 - Drugs and other substances.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 5 2010-10-01 2010-10-01 false Drugs and other substances. 392.4 Section 392.4... VEHICLES General § 392.4 Drugs and other substances. (a) No driver shall be on duty and possess, be under the influence of, or use, any of the following drugs or other substances: (1) Any 21 CFR 1308.11...

  19. Drug Use Patterns and Socio-Demographic Profiles of Substance ...

    African Journals Online (AJOL)

    Substance abuse is a critical problem in Botswana, yet empirical evidence on substance users is limited. The current study sought to examine patterns of drug use and sociodemographic profiles of clients who sought treatment at a substance abuse treatment centre in Gaborone, Botswana. Findings showed clients' age ...

  20. Psychoactive substance use/abuse among students in Igbinedion ...

    African Journals Online (AJOL)

    Psychoactive substance use/abuse among students in Igbinedion University, Okada, Nigeria-new challenges. E Uwadiae ... (NPF), National Drug Law Enforcement Agency (NDLEA) must be sufficiently informed that substances of abuse have gone beyond the conventional substances like alcohol, cannabis, cigarette etc.

  1. The symbolic language of substances and molecules: noise or ...

    African Journals Online (AJOL)

    Most substances are given names and formulae based upon knowledge of their molecules. However for substances most commonly met in elementary chemistry courses, especially inorganic substances, this is often not the case. The potential noise is amplified further when dealing with chemical reaction equations.

  2. Adolescent Sexual Behaviors at Varying Levels of Substance Use Frequency

    Science.gov (United States)

    Floyd, Leah J.; Latimer, William

    2010-01-01

    Combining substance use and sex compounds the risk of contracting sexually transmitted diseases, including HIV. However, the association between substance use and sexual behaviors may vary by substance and sexual behavior. The current study sought to examine the relationship between alcohol and marijuana use frequency and specific sexual…

  3. Prevalence of Substance Use in a Rural Teenage Population.

    Science.gov (United States)

    Silverman, Wade H.

    1991-01-01

    Surveyed all secondary school students (n=1,175) in rural county school system to assess prevalence rates of substance use for teenagers and their parents. Age, sex, and race were related to frequency and type of substance abuse. Lifestyle variables such as music preferences, sexual activity, and choice of friends also related to substance use.…

  4. Potential hazard by toxic substances in foods. Environmental protection

    Energy Technology Data Exchange (ETDEWEB)

    Unterhalt, B

    1974-01-01

    This paper reviews various toxic substances found in foods. These toxic substances include not only natural occurring toxins but also bacterial food poisons, pesticide residues, heavy metals, and food additives. The potential hazard of each toxic substance is discussed. 74 references.

  5. How to approach substance identification in qualitative bioanalysis

    NARCIS (Netherlands)

    Hartstra, J; Franke, J.P.; de Zeeuw, R.A

    2000-01-01

    The ultimate goal in qualitative analysis in the biosciences is tb demonstrate with acceptable probability that for an unknown constituent in a sample only one substance comes into consideration and that all other substances can be rejected. In the biosciences, identification of relevant substances

  6. Substance Use by Persons with Recent Spinal Cord Injuries.

    Science.gov (United States)

    Heinemann, Allen W.; And Others

    Substance use histories were obtained from 103 persons (16 to 63 years of age) with recent spinal cord injuries (SCI). Lifetime exposure to and current use of substances with abuse potential were substantially greater in this sample compared to a like-age national sample. Exposure to and recent use of substances with abuse potential was…

  7. From substance use to homelessness or vice versa?

    NARCIS (Netherlands)

    McVicar, Duncan; Moschion, Julie; van Ours, Jan

    Homelessness is associated with substance use, but whether substance use precedes or follows homelessness is unclear. We investigate the nature of the relationship between homelessness and substance use using data from the unique Australian panel dataset Journeys Home collected in 4 surveys over the

  8. Pulmonary complications of smoked substance abuse.

    OpenAIRE

    Tashkin, D P

    1990-01-01

    After tobacco, marijuana is the most widely smoked substance in our society. Studies conducted within the past 15 years in animals, isolated tissues, and humans indicate that marijuana smoke can injure the lungs. Habitual smoking of marijuana has been shown to be associated with chronic respiratory tract symptoms, an increased frequency of acute bronchitic episodes, extensive tracheobronchial epithelial disease, and abnormalities in the structure and function of alveolar macrophages, key cell...

  9. Gang youth, substance use, and drug normalization

    OpenAIRE

    Sanders, Bill

    2012-01-01

    Gang membership is an indicator of chronic substance use.1 Evidence from North America and Europe indicates that gang youth, in comparison to their non-gang peers, are more likely to report alcohol and illicit drug use (Bendixen, Endresen, & Olweus, 2006; Gatti, Tremblay, Vitaro, & McDuff, 2005; Gordon, et al., 2004; Hall, Thornberry, & Lizotte, 2006; Sharp, Aldridge, & Medina, 2006). Qualitative studies focusing specifically on gang members have also noted high frequencies of lifetime rates ...

  10. Reforming Dutch substance abuse treatment services.

    Science.gov (United States)

    Schippers, Gerard M; Schramade, Mark; Walburg, Jan A

    2002-01-01

    The Dutch substance abuse treatment system is in the middle of a major reorganization. The goal is to improve outcomes by redesigning all major primary treatment processes and by implementing a system of regular monitoring and feedback of clinical outcome data. The new program includes implementing standardized psychosocial behavior-oriented treatment modalities and a stepped-care patient placement algorithm in a core-shell organizational model. This article outlines the new program and presents its objectives, developmental stages, and current status.

  11. Medical marijuana users in substance abuse treatment

    OpenAIRE

    Swartz Ronald

    2010-01-01

    Abstract Background The rise of authorized marijuana use in the U.S. means that many individuals are using cannabis as they concurrently engage in other forms of treatment, such as substance abuse counseling and psychotherapy. Clinical and legal decisions may be influenced by findings that suggest marijuana use during treatment serves as an obstacle to treatment success, compromises treatment integrity, or increases the prevalence or severity of relapse. In this paper, the author reviews the ...

  12. Adolescent substance abuse. Assessment in the office.

    Science.gov (United States)

    Dias, Philomena J

    2002-04-01

    There are no gold-standard tests for evaluating a teen suspected of abusing substances. Awareness of the high prevalence of substance abuse in youth, a high index of suspicion, and a firm desire to be a part of the solution are all that is required to address the problem of substance abuse in youth. In an age of "dotcoms" and societal complexity that fosters an emotionally "disconnected" atmosphere by uniting adolescents only by what they buy, plug into, click on, or blast away, teens need trusted medical homes where caring pediatricians are available to give youth accurate and authoritative facts and care to help them build inner resilience and connect them to the pain and hurt of the people in their lives. Until now, the "three strikes and you're out" maxim has been applied in medical care. This maxim may work for baseball, Clintonomics, and practical office management strategies but is not recommended for addressing the needs of substance using or abusing youth who are prey to advertising strategies. The size of the marketing and advertising budgets of the alcohol and cigarette industries is an indication of the relentless marketing directed toward vulnerable youth. Pediatricians would be doing teens a disservice if they fail to countermand this marketing effect by not using the "rule of seven"--the "seven 'S' screen," seven education attempts, seven different ways over 7 years, and persistence over seven attempts of chemically dependent adolescents to quit. It has been said by Osler that "These are our methods--to carefully observe the phenomena of life in all its stages, to cultivate the reasoning of the faculty so as to be able to know the true from the false. This is our work--to prevent disease, to relieve suffering, to heal the sick," and provide HOPE always.

  13. Genetic and perinatal effects of abused substances

    Energy Technology Data Exchange (ETDEWEB)

    Brande, M.C.; Zimmerman, A.M.

    1987-01-01

    This book provides an overview of the effects of several abused drugs, including opiates, cannabinoids, alcohol, nicotine, and cocaine, with special emphasis on the actions of these substances at the molecular and cellular levels. The first half deals with genetic effects, including molecular genetics, biochemical genetics, pharmacogenetics, cytogenetics, and genetic toxicity. The second half focuses on perinatal effects and covers: drug abuse during pregnancy; biochemical aspects of marihuana on male reproduction; and long-term behavioral and neuroendocrine effects of perinatal alcohol exposure.

  14. Psilocybin for treating substance use disorders?

    Science.gov (United States)

    de Veen, Bas T H; Schellekens, Arnt F A; Verheij, Michel M M; Homberg, Judith R

    2017-02-01

    Evidence based treatment for Substance use disorders (SUD) includes psychotherapy and pharmacotherapy. However, these are only partially effective. Hallucinogens, such as psilocybin, may represent potential new treatment options for SUD. This review provides a summary of (human) studies on the putative therapeutic effects of psilocybin, and discusses the receptor systems, brain regions and cognitive and emotional processes mediating psilocybin's effects. Psilocybin's chemical structure is similar to that of serotonin. Dysregulations in the serotonin system are associated with alterations in stress hormones, such as cortisol, and mood disorders. After psilocybin administration cortisol levels spike and activate the executive control network, with subsequent increased control over emotional processes, and relief of negative thinking and persistent negative emotions. Preliminary data of ongoing alcohol and smoking addiction studies in humans shows promising effects of psilocybin administration on substance use. Importantly, psilocybin has a low risk of toxicity and dependence and can be used safely under controlled clinical conditions. Areas covered: This paper is a narrative review based on the search terms: psilocybin, substance use disorder, addiction, depression, serotonin. Literature on potential efficacy and mechanisms of action of psilocybin in SUD is discussed. Expert commentary: Recent positive findings with psilocybin need confirmation in well-designed placebo controlled randomized trials employing a large sample size.

  15. Defining utility trace substance emissions and risks

    International Nuclear Information System (INIS)

    Torrens, I.M.

    1993-01-01

    An update is presented on the activities of EPRI and other organizations, including DOE, aimed at improving the quality of available information on utility trace element emissions, control technologies and risks. Because of these efforts, the state of knowledge is advancing rapidly. The 1990 Clean Air Act Amendments aim to reduce emissions of 189 substances that they designate as hazardous air pollutants - commonly called air toxics. The more neutral term open-quotes trace substancesclose quotes is used in this paper, since most are emitted in extremely low concentrations from utility stacks. The degree of toxicity or hazard at these concentrations is subject to considerable uncertainty, and clarifying this is one of the objectives of the work in progress. The most clear and urgent need emanating from the CAAA has been to obtain reliable information on which of the substances on the CAAA list are emitted from different types of power plants - in what amounts, what risks they pose, how much is removed by today's pollution control equipment. EPRI is addressing the issue on several fronts, e.g.; developing a data base and tools that will enable utilities to estimate emissions levels from their power facilities, given the types of fuels burned and plant characteristics; developing a better understanding of how emissions are transported and transformed before they encounter humans and ecological systems; and assessing the risk to public health and the environment posed by utility releases of these substances

  16. Alimentation animale et valeur nutritionnelle induite sur les produits dérivés consommés par l’homme : Les lipides sont-ils principalement concernés ?

    Directory of Open Access Journals (Sweden)

    Bourre Jean-Marie

    2003-09-01

    . Les faibles variations susceptibles d’être éventuellement obtenues ne permettraient toutefois pas de participer significativement à l’amélioration de la couverture de besoins nutritionnels de l’homme. Les produits tripiers font exception, mais ils ne sont plus consommés que marginalement et ne peuvent concourir significativement à la couverture moyenne des besoins en nutriments de l’homme. Toutefois, concernant les poissons, de notables différences peuvent être observées selon les lieux de pêche et les saisons (entre autres, et, par voie de conséquence très probable, selon les élevages (pour les vitamines D et E, l’iode le fer et le sélénium. Pour les œufs, la composition varie beaucoup selon les formulations des aliments donnés aux poules pondeuses (principalement pour les vitamines A, D et E et plusieurs éléments, dont l’iode. Une nouvelle approche se dessine avec les micro-nutriments non indispensables pour l’homme trouvés dans les produits animaux destinés à la consommation humaine. Il s’agit, par exemple, des caroténoïdes liposolubles. Parmi ceux-ci, la lutéine et la zéaxanthine sont présentes dans le jaune de l’œuf, contribuant à sa coloration. Or, des travaux très récents montrent que ces molécules peuvent être quantitativement augmentées dans l’œuf par une alimentation appropriée des poules pondeuses. Point nouveau, la consommation d’œufs ainsi enrichis a permis d’accroître les concentrations des deux caroténoïdes dans le sang de volontaires humains, et par conséquent dans leur rétine. Par ailleurs, on sait que ces substances sont présentes dans l’œil, en particulier dans la rétine. Or, une augmentation de la prise alimentaire de lutéine et de zéaxanthine induit leur accroissement dans la rétine. D’autre part, il est bien connu que la cataracte comme la dégénérescence maculaire liée à l’âge sont presque 2 fois moins fréquentes chez les sujets dont la teneur de ces substances

  17. Estudio teórico de las propiedades elásticas de los minerales Cu3TMSe4 (TM = V, Nb, Ta por medio de cálculos atomísticos de primeros principios Theoretical study of the elastic properties of the minerals Cu3TMSe4 (TM = V, Nb, Ta by means of atomistic first-principles calculations

    Directory of Open Access Journals (Sweden)

    Carlos Mario Ruiz

    2011-06-01

    Full Text Available Las propiedades elásticas de la familia de los minerales isoestructurales Cu3VSe4, Cu3NbSe4 y Cu3TaSe4 han sido calculadas por primera vez usandoel estado del arte en cálculos atomísticos de primeros-principios, utilizandola Teoría de los Funcionales de la Densidad y la Aproximación del Gradiente Generalizado para el funcional de la energía de intercambio-correlación. Laspropiedades elásticas calculadas son el módulo volumétrico (B, las constantes elásticas (c11, c12 y c44, el factor de anisotropía de Zener (A, el módulo de cizalladura isotrópico (G, el módulo de Young (Y, y la razón de Poisson(ν. A través de estas cantidades también hemos calculado otras propiedades termodinámicas tales como la velocidad promedio del sonido transversal (st y longitudinal (sl y la temperatura de Debye (ΘD. Los valores calculados de B, c11, c12 y c44, G, Y , y ν nos llevan a la conclusión que estos compuestosson compresibles, frágiles y quebradizos.The elastic properties of the family of isostructural minerals Cu3VSe4, Cu3NbSe4 and Cu3TaSe4 have been calculated for the first time using the state of the art in first-principles atomistic calculations, using Density Functional Theory and the Generalized Gradient Approximation for the exchangecorrelation energy functional. The elastic properties calculated are bulk modulus (B, the elastic constants (c11, c12 and c44, the Zener anisotropy factor (A, the isotropic shear modulus (G, the Young modulus (Y , and the Poisson ratio (. By means of these quantities we also computed other thermodynamic properties such as the average transversal (st and longitudinal (sl sound velocities and the Debye temperature (D. The calculated values of B, c11, c12 and c44, G, Y and lead us to the conclusion that these compounds are compressible, fragile and brittle.

  18. Medical marijuana users in substance abuse treatment

    Directory of Open Access Journals (Sweden)

    Swartz Ronald

    2010-03-01

    Full Text Available Abstract Background The rise of authorized marijuana use in the U.S. means that many individuals are using cannabis as they concurrently engage in other forms of treatment, such as substance abuse counseling and psychotherapy. Clinical and legal decisions may be influenced by findings that suggest marijuana use during treatment serves as an obstacle to treatment success, compromises treatment integrity, or increases the prevalence or severity of relapse. In this paper, the author reviews the relationship between authorized marijuana use and substance abuse treatment utilizing data from a preliminary pilot study that, for the first time, uses a systematic methodology to collect data examining possible effects on treatment. Methods Data from the California Outcomes Measurement System (CalOMS were compared for medical (authorized marijuana users and non-marijuana users who were admitted to a public substance abuse treatment program in California. Behavioral and social treatment outcomes recorded by clinical staff at discharge and reported to the California Department of Alcohol and Drug Programs were assessed for both groups, which included a sample of 18 reported medical marijuana users. Results While the findings described here are preliminary and very limited due to the small sample size, the study demonstrates that questions about the relationship between medical marijuana use and involvement in drug treatment can be systematically evaluated. In this small sample, cannabis use did not seem to compromise substance abuse treatment amongst the medical marijuana using group, who (based on these preliminary data fared equal to or better than non-medical marijuana users in several important outcome categories (e.g., treatment completion, criminal justice involvement, medical concerns. Conclusions This exploratory study suggests that medical marijuana is consistent with participation in other forms of drug treatment and may not adversely affect

  19. Schizophrenia, substance abuse, and violent crime.

    Science.gov (United States)

    Fazel, Seena; Långström, Niklas; Hjern, Anders; Grann, Martin; Lichtenstein, Paul

    2009-05-20

    Persons with schizophrenia are thought to be at increased risk of committing violent crime 4 to 6 times the level of general population individuals without this disorder. However, risk estimates vary substantially across studies, and considerable uncertainty exists as to what mediates this elevated risk. Despite this uncertainty, current guidelines recommend that violence risk assessment should be conducted for all patients with schizophrenia. To determine the risk of violent crime among patients diagnosed as having schizophrenia and the role of substance abuse in mediating this risk. Longitudinal designs were used to link data from nationwide Swedish registers of hospital admissions and criminal convictions in 1973-2006. Risk of violent crime in patients after diagnosis of schizophrenia (n = 8003) was compared with that among general population controls (n = 80 025). Potential confounders (age, sex, income, and marital and immigrant status) and mediators (substance abuse comorbidity) were measured at baseline. To study familial confounding, we also investigated risk of violence among unaffected siblings (n = 8123) of patients with schizophrenia. Information on treatment was not available. Violent crime (any criminal conviction for homicide, assault, robbery, arson, any sexual offense, illegal threats, or intimidation). In patients with schizophrenia, 1054 (13.2%) had at least 1 violent offense compared with 4276 (5.3%) of general population controls (adjusted odds ratio [OR], 2.0; 95% confidence interval [CI], 1.8-2.2). The risk was mostly confined to patients with substance abuse comorbidity (of whom 27.6% committed an offense), yielding an increased risk of violent crime among such patients (adjusted OR, 4.4; 95% CI, 3.9-5.0), whereas the risk increase was small in schizophrenia patients without substance abuse comorbidity (8.5% of whom had at least 1 violent offense; adjusted OR, 1.2; 95% CI, 1.1-1.4; Pgenetic or early environmental) confounding of the

  20. Is It the Music? Peer Substance Use as a Mediator of the Link between Music Preferences and Adolescent Substance Use

    Science.gov (United States)

    Mulder, Juul; Ter Bogt, Tom F. M.; Raaijmakers, Quinten A. W.; Gabhainn, Saoirse Nic; Monshouwer, Karin; Vollebergh, Wilma A. M.

    2010-01-01

    Both music preferences and the substance use behavior of peers are important elements in explaining adolescent substance use. The extent to which music preference and peer use overlap in explaining adolescent substance use remains to be determined. A nationally representative sample of 7324 Dutch school-going adolescents (aged 12-16) provided data…

  1. Peer substance use and homelessness predicting substance abuse from adolescence through early adulthood.

    Science.gov (United States)

    Tompsett, Carolyn J; Domoff, Sarah E; Toro, Paul A

    2013-06-01

    Adolescents who experience homelessness are at higher risk for abusing substances, and for being exposed to substance-using peers. The current study used a longitudinal design to track substance abuse, affiliation with substance-using peers, and episodes of homelessness among a sample of 223 adolescents who were housed at the baseline data collection and 148 adolescents who were housed at baseline. Participants were interviewed at six waves over 6.5 years, covering an age range from 13 to 25. Many participants experienced a recurrence of homelessness during follow-up, with 64.6 % of the baseline homeless group and 22.6 % of the baseline housed group reporting an additional episode of homelessness. Both alcohol abuse and other drug abuse symptoms showed an increase in adolescence followed by slowing in early adulthood. Recent homelessness and friend alcohol use predicted alcohol abuse symptoms, and the strength of the influence of friend use decreased over time. Recent homelessness and friend drug use predicted other drug abuse symptoms. Duration of the initial episode of adolescent homelessness showed no influence on substance abuse over time, or the effects of other predictors, highlighting the importance of conceptualizing the experience of homelessness as a recent stressor rather than an enduring personal characteristic.

  2. A container for containing and protecting a radioactive substance

    International Nuclear Information System (INIS)

    1974-01-01

    The invention relates to a container adapted to contain and protect a radio-active substance. That container comprises a heat sensitive device for automatically (and, preferably, sealingly) enclosing and protecting the radio-active substance, should room temperature reach a predetermined level. Thus, the radio-active substance cannot escape in case of fire. Preferably, a bolt is also provided, capable of being actuated at a temperature slightly above the temperature actuating the protective device so as to maintain the radioactive substance protected. This can be applied to containers containing a radio-active substance such as polonium 210 [fr

  3. SUBSTANCE ABUSE, DEPENDENCE AND THE WORKPLACE: A LITERATURE OVERVIEW

    Directory of Open Access Journals (Sweden)

    Smook, Breggie

    2014-04-01

    Full Text Available Substance abuse and dependence among the employed have massive cost implications for South Africa. Employers are legally obliged to provide opportunities for the treatment of substance dependence before dismissal is considered. Problem areas are the following: inadequate identification of employees with substance-abuse problems, infrequent treatment referrals, and overlooking of substance abuse in the workplace. This article attempts to address these issues by providing an overview of literature dealing with the problem of substance abuse and dependence in the workplace. Addressing this problem calls for specialist intervention measures, which are discussed in the article.

  4. Principales creencias sexuales disfuncionales en mayores

    OpenAIRE

    Badenes-Sastre, Marta; Castro Calvo, Jesús; Ballester Arnal, Rafael

    2017-01-01

    Introduction: Hypersexual disorder is a clinical diagnosis characterised by an ex- cessive sexual desire, together with a pathological inability to control it. It is esti- mated that this clinical diagnosis could affect about 6% of the total population, although this figure varies according to the instrument used for its diagnosis. One of the most important problems when accurately estimating its prevalence is related to the use of non-validated assessment instruments. In order ...

  5. Papel ecológico en la cadena trófica de los peces que pasan el invierno en ecosistema de la laguna Culbin Sands, NE Escocia: Identificación de las principales interacciones tróficas y comprovación de los efectos del pez Pomatoschistus microps (Pall

    OpenAIRE

    Mariyam Mendonça, Vanda; Raffaelli, David; Boyle, Peter; Emes, Chas

    2007-01-01

    Se estudió el ecosistema de la laguna Culbin Sands, NE Escocia, durante un periodo de tres años (1994-1996) con objeto de identificar los principales acoplamientos tróficos desde invertebrados bentónicos a depredadores epibentónicos, y para evaluar el impacto de los peces que pasan el invierno sobre las comunidades de sus presas. Cada 2-4 semanas, la fauna móvil se muestreó para estudiar su dieta. Las principales interacciones tróficas identificadas, entre invertebrados bentóncos y depredador...

  6. Alcohol and Substance Use Disorders in DSM-5

    Directory of Open Access Journals (Sweden)

    Gulcan Gulec

    2015-12-01

    Full Text Available When we compare the categories about alcohol, and substance-related disorders in DSM-IV and DSM-5, the new category, named addictive disorders is the most striking change. Only gambling disorder have been identified currently in this category. This may be the most remarkable change among the changes in the DSM-5. Because the expansion of the existing diagnostic criteria may cause the assessment of and lsquo;normal behavior' as a disorder. Additionally, withdrawal of caffeine and cannabis are defined in the DSM-5. Disorders collected under the title of substance-related disorders in the DSM-IV were collected under the name of substance-related and addictive disorders in the DSM-5. Specific criterias for substance abuse and substance addiction have been combined into the name of "substance use disorders". In substance abuse, "experienced legal problems" criteria was removed and "a strong desire or urge or craving for substance use" criteria has been introduced. Henceforth, substance abuse is defined as a mild form of substance use disorders in the DSM-5. A change in the prevalence of substance use disorders should be investigated by the new researches.

  7. Epidemiology of Substance Use in Reproductive-Age Women

    Science.gov (United States)

    McHugh, R. Kathryn; Wigderson, Sara; Greenfield, Shelly F.

    2014-01-01

    Synopsis A significant number of women of reproductive age in the U.S. use addictive substances. In 2012 more than 50% reported current use of alcohol, 20% used tobacco products, and approximately 13% used other drugs. Among women, use of these substances is associated with a number of significant medical, psychiatric, and social consequences, and the course of illness may progress more rapidly in women than men. The lifetime prevalence of alcohol and drug use disorders in women is 19.5% and 7.1%, respectively. In addition, as most addictive substances cross the placenta and have deleterious effects on fetal development, substance use has additional potential adverse consequences for women of reproductive age who may become pregnant. Specific barriers to accessing effective substance use treatment exist for women. The prevalence of substance use and evidence of accelerated illness progression in women highlight the importance of universal substance use screening in women in primary care settings. PMID:24845483

  8. Acculturation factors and substance use among Asian American youth.

    Science.gov (United States)

    Le, Thao N; Goebert, Deborah; Wallen, Judy

    2009-07-01

    In this study of 329 Cambodian, Chinese, Laotian/Mien, and Vietnamese youth in Oakland, California, acculturation factors of individualism-collectivism and acculturative dissonance were examined as risk and protective factors for substance use. Results of structural equation modeling and bootstrapping revealed that peer substance use was a robust mediator between individualism and youth's self-reported substance use, particularly among Vietnamese and males. Peer substance use also significantly mediated the relation between collectivism and substance use for females. As such, there appears to be ethnic and gender group variations in the saliency of cultural/acculturation factors with respect to substance use. Implications for substance use prevention programs for ethnic and immigrant youth are discussed.

  9. Substance Use among Muslim Students in Aceh, Indonesia

    Directory of Open Access Journals (Sweden)

    Inda Mariana Harahap

    2012-08-01

    Full Text Available Background: Illicit substance use is a serious social problem faced by adolescents worldwide, including adolescents in Aceh and has many negative consequences. In addition, illicit substance use does not fit with the values of Islamic teaching, and is strictly prohibited in Islam. Purpose: The aims of this paper are to determine the prevalence of illicit substance use, the stages of substance use, and types of substance used among Muslim students in senior high schools in Aceh, Indonesia. Method: Four hundred and twenty six students who met the inclusion criteria were recruited from four senior high schools in Banda Aceh by using simple random sampling, and of these, 290 returned a completed questionnaire. A self reported questionnaire was used to collect data. Result: The mean age of the subjects was 15.9 years old and the majority of them were female (68.6%. The study found that the prevalence of substance use was 2.4%with a higher number of females than males who had used illicit substances. The common substances that were used by the students were marijuana and dextromethorphon, as well as intentionally inhaled substances. Lastly, out of the students who had used illegal substances the majority was in the regular use stage (1.4%. Conclusion: This study found that substance use among Muslim students in Aceh exists, although prevalence was low. Thus, several preventive programs may be needed in Aceh not only for Muslims students who have used substances but also for students who have not use illegal substances. Keywords: Adolescents, Substance use, Muslim students, Indonesia.

  10. Intersecting Identities and Substance Use Problems: Sexual Orientation, Gender, Race, and Lifetime Substance Use Problems

    Science.gov (United States)

    Mereish, Ethan H.; Bradford, Judith B.

    2014-01-01

    Objective: Research has documented that sexual minorities are at greater risk for substance use than heterosexuals. However, there are limited studies and mixed findings when investigating these health disparities among racial and ethnic minority samples. We used an intersectionality framework to examine disparities in lifetime substance use problems between heterosexual and sexual minority men and women and within sexual minority groups among a racially diverse sample. Method: A nonprobability sample of heterosexual (n = 1,091) and sexual minority (n = 1,465) patients from an urban community health center ranged in age from 18 to 72 years. Participants completed a brief patient survey and reported demographic information and history of lifetime substance use problems. Logistic regressions analyses were used to examine interactions between and among sexual orientation, gender, and race. Results: We found a significant three-way interaction among sexual orientation, gender, and race. Sexual minorities had a greater risk of self-reported lifetime substance use problems than heterosexuals, with nuanced gender and racial differences. Of greatest note, sexual minority women of color had greater risks than heterosexual women of color and than White sexual minority women. Sexual minority men of color did not differ in their risk when compared with heterosexual men of color, and they had lower risk than White sexual minority men. Conclusions: The results of this study demonstrate that an intersectionality framework is crucial to clearly identify lifetime substance use disparities between racially diverse sexual minority and heterosexual men and women. Future research, treatment, and policy should use intersectionality approaches when addressing substance use disparities. PMID:24411810

  11. New York hazardous substances emergency events surveillance: learning from hazardous substances releases to improve safety

    International Nuclear Information System (INIS)

    Welles, Wanda Lizak; Wilburn, Rebecca E.; Ehrlich, Jenny K.; Floridia, Christina M.

    2004-01-01

    Since 1993, the New York State Department of Health, funded by the Agency for Toxic Substances and Disease Registry, has collected data about non-petroleum hazardous substances releases through the Hazardous Substances Emergency Events Surveillance (NYHSEES) project. This study investigates risk factors for hazardous substances releases that may result in public health consequences such as injury or reported health effects. The 6428 qualifying events that occurred during the 10-year-period of 1993-2002 involved 8838 hazardous substances, 842 evacuations, more than 75,419 people evacuated, and more than 3120 people decontaminated. These events occurred both at fixed facilities (79%) and during transport (21%). The causative factors most frequently contributing to reported events were equipment failure (39%) and human error (33%). Five of the 10 chemicals most frequently associated with injuries were also among the 10 chemicals most frequently involved in reported events: sulfuric acid, hydrochloric acid, ammonia, sodium hypochlorite, and carbon monoxide. The chemical categories most frequently associated with events, and with events with adverse health effects were volatile organic compounds (VOCs) and solvents, and acids. Events with releases of hazardous substances were associated with injuries to 3089 people including employees (37%), responders (12%), the general public (29%) and students (22%). The most frequently reported adverse health effects were respiratory irritation, headache, and nausea or vomiting. Most of the injured were transported to the hospital, treated, and released (55%) or treated at the scene (29%). These data have been used for emergency response training, planning, and prevention activities to reduce morbidity and mortality from future events

  12. Principales géneros de nematodos fitoparásitos asociados a plátano y piña en las regiones Huetar Norte y Huetar Atlántica de Costa Rica

    Directory of Open Access Journals (Sweden)

    Tomás de Jesús Guzmán-Hernández

    2014-02-01

    Full Text Available Durante esta investigación se muestrearon periódicamente sistemas productivos de piña y plátano en la Región Huetar Norte (RHN y de piña en la Región Huetar Atlántica (RHA, con el objetivo de identificar los géneros de nematodos fitoparásitos asociados a estos cultivos, su frecuencia y densidad de población. También se exploró la dinámica poblacional de los principales géneros. En el cultivo de piña, los nematodos con mayor densidad de población y más frecuentemente detectados en ambas regiones estudiadas fueron Pratylenchus y Helicotylenchus. Las poblaciones de estos nematodos fueron fluctuantes en la RHN y con un crecimiento que puede explicarse mediante funciones polinómicas en la RHA. En el caso del plátano, los nematodos con mayor densidad de población y más frecuentemente detectados fueron Radopholus similis, Pratylenchus y Meloidogyne. Las poblaciones de estos nematodos también mostraron fluctuaciones en el tiempo.

  13. El profesional de las Relaciones Públicas en Galicia: el caso de los principales ayuntamientos gallegos/Professional Public Relations in Galicia: the case of the main Galician city councils

    Directory of Open Access Journals (Sweden)

    Montse Vázquez Gestal

    2014-05-01

    Full Text Available Presentamos un estudio que pretende hacer una radiografía sobre el estado actual de la profesión de las Relaciones Públicas actual en el contexto institucional gallego. Para ello, se estudiará el trabajo de RRPP que se desarrolla desde los Ayuntamientos y el papel que juegan los profesionales de este ámbito, así como sus principales funciones, muchas veces alejadas de las propias de un Relaciones Públicas y otras, en cambio, restringidas única y exclusivamente a las de periodista u organizador de eventos. En este sentido, el trabajo aportará datos referentes a la formación originaria de los profesionales responsables de la comunicación en los Ayuntamientos más importantes de Galicia, así como la importancia que desde estas organizaciones institucionales se le concede al puesto de dirección de comunicación. // We present a study which aims to make an x-ray on the current state of the public relations profession in the Galicia institutional context. To do that, will be studied the work of public relations that develops from councils and the role of the professionals in this field, as well as its main functions, often away from their own public relations formation and other, on the other hand, restricted exclusively to the journalism and organizer of events.

  14. Las principales políticas públicas de Formación Docente desde las voces de los actores. El caso de los Polos de Desarrollo (2000-2001

    Directory of Open Access Journals (Sweden)

    Luis Porta

    2017-11-01

    Full Text Available En la historia reciente de la formación docente de nuestro país han sucedido diversos procesos que pretendieron generar y construir proyectos de formación diferenciados y con alto recupero pedagógico. En este artículo expondremos, las principales políticas públicas para el sector de la formación docente no universitario que a nuestro criterio merecen ser destacadas y recuperadas. Consideramos que el Magisterio de Educación Básica (MEB, el Programa de Transformación de la Formación Docente (PTFD, el Proyecto Polos de Desarrollo, el Programa de Renovación Pedagógica y la creación del Instituto Nacional de Formación Docente (INFOD, vertebran el esqueleto de políticas públicas más importante desde la restitución democrática en materia de formación docente y cuyas huellas hoy se reconocen sedimentadas de maneras diversas en las instituciones y en el subsistema formador argentino. Recuperaremos particularmente el proyecto “Polos de Desarrollo (2000-2001” a partir de los testimonios de los propios actores y de referentes del campo de la formación docente.

  15. Relación entre morfología foliar de antófitos y factores abióticos en las principales pluvisilvas de la Región Oriental cubana

    Directory of Open Access Journals (Sweden)

    Eddy Martínez Quesada

    2009-06-01

    Full Text Available Se estudió la morfología foliar de los antófitos que son representativos de cuatro tipos de pluvisilvas de la Región Oriental de Cuba y se relacionó con los principales factores abióticos. Se encontró que existen varios tipos de hojas, pero predominó la micrófila en las especies endémicas y la mesófila, en las no endémicas. En la epidermis foliar se hallaron estructuras que son características de plantas mesomórficas y algunas xeromórficas, pero también se observaron otras que permiten una adaptación a las condiciones de alta humedad atmosférica, las que se consideraron higromórficas.Relationship between antophyte foliar morphology and abiotic factors in the main rainforests of Eastern Cuba. The foliar morphology of representative antophytes in four rainforest types of Eastern Cuba was studied in relation to the main abiotic factors. Although there are several leaf types in these forests, the microphyll type is the most important among endemic species in the ophiolites complex and the Montane rainforest. At the Lowland rainforest (metamorphic complex the mesophyll leaf was the most important. Most foliar epidermis had structures normally found in mesomorphic plants, but xeromorphic and higromorphic morphologies were also present. Rev. Biol. Trop. 57 (1-2: 235-256. Epub 2009 June 30.

  16. Evaluación de etiquetado y empaquetado de productos de tabaco en colombia: principales retos jurídicos en el proceso de implementación de esta medida

    Directory of Open Access Journals (Sweden)

    PINZÓN, Lorena Viviana Calderón

    2012-11-01

    Full Text Available El presente artículo pretende realizar el estudio de los principales retos jurídicos que ha tenido el proceso de implementación de la normatividad sobre etiquetado y empaquetado de productos de tabaco en Colombia. Para este fi n, es necesario conocer los procesos de elaboración de la legislación sobre control de tabaco, los avances que la jurisprudencia de la Corte Constitucional colombiana ha adelantado sobre el tema y las medidas administrativas llevadas a cabo por parte del Ministerio de Salud, punto focal sobre control de tabaco en el país. Es indispensable, de igual forma, reconocer la articulación que debe tener esta disposición respecto de su estudio, a partir del plan de medidas MPOWER, especialmente con la medida de prohibición de toda forma de publicidad, promoción y patrocinio de productos de tabaco. Lo anterior ha permitido, a partir de la armonización de los contenidos de la normativa internacional con el ordenamiento interno colombiano, estructurar los lineamientos de política del Gobierno e implementar efi cazmente la legislación actual.

  17. Asignación de primas en el seguro del automóvil utilizando el Análisis en ComponentesPrincipales Funcionales = Premium allocation in the car insurance by using Functional Principal Component Analysis.

    Directory of Open Access Journals (Sweden)

    Herranz Peinado, C. Patricia

    2007-01-01

    Full Text Available El estudio de las primas de riesgo en el seguro del automóvil es de suma importancia, debido a la gran competitividad existente en el mercado asegurador. En este artículo se pretende proponer un sistema de bonificación-penalización de las primas de riesgo utilizando el Análisis Funcional en Componentes Principales. En concreto, se realiza un estudio empírico con los datos reales de una compañía aseguradora con cobertura nacional. Aplicando el sistema propuesto de bonificación-penalización a los perfiles de comportamiento de los asegurados, se obtienen las primas de riesgo para cada uno de los perfiles considerados y tramos de edad. = The study of the premium risk in the car insurance is really important because the insurance market is very competitive. In this article we show a bonus-malus method of risk premiums. To do this, we use the Functional Principal Component Analysis. More precisely, we explain an empirical study with the real data of an insurance company. By applying the bonus-malus method that we have given, we are able to obtain the premium risk for different profiles and age ranges.

  18. Catastrophes et consommation des substances psychoactives

    Directory of Open Access Journals (Sweden)

    Krivokapić Žilijeta

    2009-01-01

    Full Text Available (francuski Les catastrophes, les accidents, les stress, les traumatismes sont des expériences négatives de vie accompagnées de changements physiologiques, cognitifs, émotionnels et comportementaux. Les stratégies les plus courantes inefficaces à résoudre les expériences de vie négatives sont: l' agression - ouverte (physique et / ou verbale, passive et latente, le retrait social, le placage, la dépression, l'impuissance, l' isolement et l' abus de médicaments, en particulier de drogues. Les personnes se trouvant dans des situations stressantes essayent de s' aider elles-mêmes souvent en recourant à des substances qui procurent une amélioration de leur état et suppriment le malaise momentané. Cette 'thérapie par auto-thérapie' comporte de graves risques La personne qui, après une période de consommation de ces substances devenaient dépendante, manifeste des changements visibles au niveau physique et psychologique. Elle se dérobe à ses obligations, rompt avec les activités auxquelles elle prenait plaisir autrefois de même qu' avec ses loisirs et ses intérêts; elle change des amis, ses relations familiales et amicales deviennent pauvres et remplies de nombreux conflits; elle devient moins critique et plus manipulative, commence à mentir, trompe pour dissimuler sa toxicomanie, rejoint un groupe de ses semblables, se livre à des activités criminogènes, de plus en plus se dégrade physiquement. L' alcool qui, étant le plus accessible et par conséquent généralement 'la première mesure d' auto-thérapie', a un impact particulièrement dévastateur sur l' organisme sensible au point de vue psycho-physique. Nous assistons à de nombreuses difficultés et des problèmes qui, à la suite de la consommation d' alcool, aggravent ceux liés à des expériences des événements traumatisants. De même l' efficacité de certains comprimés de réduire les tensions ou d' améliorer l' état du patient conduit fréquemment

  19. Failure to get into substance abuse treatment.

    Science.gov (United States)

    Fisher, Dennis G; Reynolds, Grace L; D'Anna, Laura H; Hosmer, David W; Hardan-Khalil, Kholoud

    2017-02-01

    Among substance abusers in the US, the discrepancy in the number who access substance abuse treatment and the number who need treatment is sizable. This results in a major public health problem of access to treatment. The purpose of this study was to examine characteristics of Persons Who Use Drugs (PWUDs) that either hinder or facilitate access to treatment. 2646 participants were administered the Risk Behavior Assessment (RBA) and the Barratt Impulsiveness Scale. The RBA included the dependent variable which was responses to the question "During the last year, have you ever tried, but been unable, to get into a drug treatment or detox program?" In multivariate analysis, factors associated with being unable to access treatment included: Previously been in drug treatment (OR=4.51), number of days taken amphetamines in the last 30days (OR=1.18), traded sex for drugs (OR=1.53), homeless (OR=1.73), Nonplanning subscale of the Barratt Impulsiveness Scale (OR=1.19), age at interview (OR=0.91), and sexual orientation, with bisexual men and women significantly more likely than heterosexuals to have tried but been unable to get into treatment. The answers to the question on "why were you unable to get into treatment" included: No room, waiting list; not enough money, did not qualify, got appointment but no follow through, still using drugs, and went to jail before program start. As expected, findings suggest that limiting organizational and financial obstacles to treatment may go a long way in increasing drug abuse treatment accessibility to individuals in need. Additionally, our study points to the importance of developing approaches for increasing personal planning skills/reducing Nonplanning impulsivity among PWUDs when they are in treatment as a key strategy to ensure access to additional substance abuse treatment in the future. Copyright © 2016 Elsevier Inc. All rights reserved.

  20. Radioactive substances found on the contaminated fish

    Energy Technology Data Exchange (ETDEWEB)

    Kiba, T; Ohashi, S; Shibata, M; Mizube, T

    1954-01-01

    Radiochemical investigation of the substance collected from the surface of tuna fish which were brought back by the No. 5 Fukuryu Maru was performed. Most of the radioactivity was found on the scales which could not be decontaminated by treating with H/sub 2/O; 80% of the activity was removed by washing the dried scales with 3N HCl. Paper chromatographic separation of the HCl fraction showed the presence of /sup 140/Ba, /sup 89/Sr, /sup 132/Te, and probably /sup 95/Zr, /sup 140/La, and rare earths.

  1. Management practices in substance abuse treatment programs.

    Science.gov (United States)

    McConnell, K John; Hoffman, Kim A; Quanbeck, Andrew; McCarty, Dennis

    2009-07-01

    Efforts to understand how to improve the delivery of substance abuse treatment have led to a recent call for studies on the "business of addiction treatment." This study adapts an innovative survey tool to collect baseline management practice data from 147 addiction treatment programs enrolled in the Network for the Improvement of Addiction Treatment 200 project. Measures of "good" management practice were strongly associated with days to treatment admission. Management practice scores were weakly associated with revenues per employee but were not correlated with operating margins. Better management practices were more prevalent among programs with a higher number of competitors in their catchment area.

  2. [Abuse, dependence and intoxication of substances].

    Science.gov (United States)

    Wada, Kiyoshi

    2015-09-01

    As for substance-related disorders, there were several differences between ICD-10 and DSM-IV, however, the concept of "dependence" had been essential for both criteria. DSM-5 published in 2013 had erased dependence. This confuses us. It is important to recognize dependence again. "Abuse" is the self-intake behavior of drug against the social norms. Repeated abuse results in dependence. Dependence is a state of loss of control against drug use due to craving. Abuse can produce "acute intoxication", and repeated abuse under dependence can produce "chronic intoxication". It is important to understand abuse, dependence and "intoxication" based on their relationship from the point of time course.

  3. Neutron activation analysis of biological substances

    International Nuclear Information System (INIS)

    Ordogh, M.

    1978-08-01

    A Bowen cabbage sample was used as a reference material for the neutron activation studies, and the method was checked by the analysis of other biological substances (blood or serum etc.). For nondestructive measurements also some non-trace elements were determined in order to decide whether the activation analysis is a useful means for such measurements. The new activation analysis procedure was used for biomedical studies as, e.g., for trace element determination in body fluids, and for the analysis of inorganic components in air samples. (R.P.)

  4. Substances stimulating recovery for radiation injury

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, A; Yonezawa, M; Katoh, N [Radiation Center of Osaka Prefecture, Sakai (Japan)

    1978-11-01

    A relationship between radiation injury and its recovery (intracellular recovery, intercellular recovery, or individual recovery) was discussed. In addition to histological researches in Japan, some substances (free radicals, endotoxin, vaccine, crude drugs, tissue extracts, blood platelet, etc.) stimulating recovery for radiation injury were introduced, and the progress of the study by the authors was summarized. Effects of a root of Panax ginseng (it is believed to accelerate segmentation of marrow cells, and synthesis of DNA and protein in rats and men), methods of its extracting and administration, its influences upon hemogram and organ weight in animal experiments, exclusion of side effects, period of administration, and purification of its effective components were reported.

  5. Extraction of substances assisted by ultrasound (UAE)

    International Nuclear Information System (INIS)

    Azuola, Rocio; Vargas, Pedro

    2007-01-01

    Different compounds present in vegetables with functional or technological properties, have gained great importance in food, pharmaceutical and cosmetic markets. Efficient methods, economical and environment friendly are sought for the extraction of these substances. A literature review has been performanced of recent publications on different extraction methods and their comparison to the ultrasound assisted extraction (UAE) to assess their effectiveness and industrial viability. The ultrasound assisted extraction (UAE) has been found to be more efficient than traditional mining methods, and cheaper and easier than non-traditional extraction methods such as microwave-assisted extraction, so it checks its industrial viability. (author) [es

  6. Substance Use among Sexual Minorities: Has it Actually Gotten Better?

    Science.gov (United States)

    Watson, Ryan J; Goodenow, Carol; Porta, Carolyn; Adjei, Jones; Saewyc, Elizabeth

    2018-06-07

    Despite efforts to decrease substance use, rates among sexual minority youth (SMY) remain higher than among heterosexuals. Substance use is a leading contributor to morbidity and mortality in adulthood, and SMY's use of substances is related to poorer mental and emotional health. We sought to document the trends in substance use for a large sample of youth over 14 years with special attention to SMY. In addition, we tested whether there were disparities in substance use behaviors between SMY and heterosexual youth. Last, we examined changes in disparities over time in substance use among SMY. We analyzed data from 8 waves of the Massachusetts YRBS (N = 26,002, M age = 16), from 1999 to 2013, to investigate trends and disparities in current tobacco, alcohol, and cannabis use for heterosexual youth and SMY. We used logistic regression interaction models to test whether these disparities have widened or narrowed for SMY, as compared to heterosexuals, over the span of 14 years. In absolute terms, substance use rates decreased for nearly all youth between 1999 and 2013. There were striking disparities in substance use between heterosexual youth and all sexual minority subgroups. These disparities in substance use narrowed among males but remained unchanged or worsened among females. Conclusions/Importance: Trends in substance use are changing over time, but not in the same ways for all sexual minority subgroups. Patterns are worsening for females. These findings suggest that we need to address the needs of LGB populations in novel ways.

  7. Substance Use among Medical Students in Kathmandu Valley

    Directory of Open Access Journals (Sweden)

    P Khanal

    2010-12-01

    Full Text Available Introduction: Substance use including tobacco and alcohol is the most important cause of preventable morbidity, disability, and premature mortality. The study aims to specify the prevalence and the pattern of use of different substance. Methods: A cross sectional study was performed amongst first year and final year students in four medical colleges in Kathmandu using self administered anonymous questionnaire.Data collectedfrom 446 students were analyzed. Results: Prevalence of substance use was found to be 60.3% among the medical students. Alcohol (57.6% was the substance most prevalently used followed by tobacco (27.58% and cannabis (12.8%. Mean age of first exposure was 17.94 (Confidence interval: 17.91-17.97. There was significant difference in the useof tobacco and cannabis amongst final year students than first year students. Male and female differed significantly in use of every substance except for benzodiazepine. Medical college, college and school were place of first exposure in 17.26%, 15.92% and 13.23% of the cases respectively. Family history was associated with substance use in medical students and was statistically significant (P<0.0001.Experimentation was the major reason for the use of most of the substances. Conclusions: Substance use is prevalent in male medical students of both first and final year. Hence steps should be initiated early in school, college and medical college to prevent substance use. Keywords: alcohol, medical students, substance use, tobacco.

  8. Enhanced Case Management versus Substance Abuse Treatment Alone among Substance Abusers with Depression

    Science.gov (United States)

    Striley, Catherine W.; Nattala, Prasanthi; Ben Abdallah, Arbi; Dennis, Michael L.; Cottler, Linda B.

    2013-01-01

    This pilot study evaluated the effectiveness of enhanced case management for substance abusers with comorbid major depression, which was an integrated approach to care. One hundred and 20 participants admitted to drug treatment who also met Computerized Diagnostic Interview Schedule criteria for major depression at baseline were randomized to…

  9. Substance use risk profiles and associations with early substance use in adolescence

    NARCIS (Netherlands)

    Malmberg, M.; Overbeek, G.J.; Monshouwer, K.; Lammers, J.; Vollebergh, W.A.M.; Engels, R.C.M.E.

    2010-01-01

    We examined whether anxiety sensitivity, hopelessness, sensation seeking, and impulsivity (i.e., revised version of the Substance Use Risk Profile Scale) would be related to the lifetime prevalence and age of onset of alcohol, tobacco, and cannabis use, and to polydrug use in early adolescence.

  10. NEIGHBORHOOD NORMS AND SUBSTANCE USE AMONG TEENS

    Science.gov (United States)

    Musick, Kelly; Seltzer, Judith A.; Schwartz, Christine R.

    2008-01-01

    This paper uses new data from the Los Angeles Family and Neighborhood Survey (L.A. FANS) to examine how neighborhood norms shape teenagers’ substance use. Specifically, it takes advantage of clustered data at the neighborhood level to relate adult neighbors’ attitudes and behavior with respect to smoking, drinking, and drugs, which we treat as norms, to teenagers’ own smoking, drinking, and drug use. We use hierarchical linear models to account for parents’ attitudes and behavior and other characteristics of individuals and families. We also investigate how the association between neighborhood norms and teen behavior depends on: (1) the strength of norms, as measured by consensus in neighbors’ attitudes and conformity in their behavior; (2) the willingness and ability of neighbors to enforce norms, for instance, by monitoring teens’ activities; and (3) the degree to which teens are exposed to their neighbors. We find little association between neighborhood norms and teen substance use, regardless of how we condition the relationship. We discuss possible theoretical and methodological explanations for this finding. PMID:18496598

  11. Landfills as sinks for (hazardous) substances.

    Science.gov (United States)

    Scharff, Heijo

    2012-12-01

    The primary goal of waste regulations is to protect human health and the environment. This requires the removal from the material cycle of those materials that cannot be processed without harm. Policies to promote recycling hold a risk that pollutants are dispersed. Materials have an environmental impact during their entire life cycle from extraction through production, consumption and recycling to disposal. Essentially there are only two routes for pollutants that cannot be rendered harmless: storage in sinks or dispersion into the environment. Many sinks do not contain substances absolutely, but result in slow dispersion. Dispersion leads to exposure and impact to human health and the environment. It is therefore important to assess the impact of the release to the environment. Based on various sources this paper discusses important material flows and their potential impact. This is compared with the intentions and achievements of European environmental and resource policy. The polluter pays principle is being implemented in Europe, but lags behind implementation of waste management regulations. As long as producers are allowed to add hazardous substances to their products and don't take their products back, it is in society's best interest to carefully consider whether recycling or storage in a sink is the better solution. This requires further development of life-cycle assessment tools and harmonization of regulations. In many cases the sink is unavoidable. Landfills as sinks will be needed in the future. Fail-safe design and construction as well as sustainable management of landfills must be further developed.

  12. Aggression and substance abuse in bipolar disorder.

    Science.gov (United States)

    Grunebaum, Michael F; Galfalvy, Hanga C; Nichols, C Matthew; Caldeira, Nathilee A; Sher, Leo; Dervic, Kanita; Burke, Ainsley K; Mann, J John; Oquendo, Maria A

    2006-10-01

    The goal of this retrospective study was to examine factors differentiating persons with bipolar disorder who did or did not have comorbid lifetime substance use disorders (SUD) at an index assessment. We also explored the chronology of onset of mood and SUD. We studied 146 subjects with DSM-defined bipolar disorder. Subgroups with and without lifetime SUD were compared on demographic and clinical measures. Substance abuse disorders in this bipolar sample were associated with male sex, impulsive-aggressive traits, comorbid conduct and Cluster B personality disorders, number of suicide attempts and earlier age at onset of a first mood episode. In a multivariable logistic regression analysis, male sex and aggression and possibly earlier age at mood disorder onset were associated with SUD. In those with or without SUD, the first mood episode tended to be depressive and to precede the onset of SUD. In persons with bipolar disorder, an earlier age of onset and aggressive traits appear to be factors associated with later development of comorbid SUD.

  13. Prehnite-pumpellyite facies metamorphism in the Cenozoic Abanico Formation, Andes of central Chile (33°50'S: chemical and scale controls on mineral assemblages, reaction progress and the equilibrium state Metamorfismo de facies prehnita-pumpellyita en la Formación Abanico del Cenozoico, Andes centrales de Chile (33°50'S: controles químicos y de escala sobre las asociaciones minerales, el progreso de la reacción y el estado de equilibrio

    Directory of Open Access Journals (Sweden)

    Marcia Muñoz

    2010-01-01

    los Bueyes, Cordillera Principal al este de Santiago (33°50'S, aflora una serie volcánica del Oligoceno Superior-Mioceno Inferior perteneciente a la Formación Abanico (Eoceno Tardío-Mioceno Temprano. Las sucesiones de roca expuestas en ambas areas, de ca. 3.300 m de espesor total, fueron afectadas por metamorfismo no deformativo de muy bajo grado en facies prehnita-pumpellyita. Esto está representado en el desarrollo extensivo de arreglos de minerales secundarios formados por epidota, inter-estratificados de clorita-esmectita, albita, cuarzo, mica blanca, y titanita. Estos arreglos minerales contienen además pumpellyita, prehnita o prehnita+actinolita en algunas muestras. Las características químicas tales como una baja variabilidad composicional de los interestratificados de clorita-esmectita y actinolita independientemente del dominio donde se hospedan estas fases, junto con una alta proporción de capas de clorita en las primeras, sugieren que estas fases representan cercanamente la composición efectiva de la roca total. Por el contrario, la composición de las pum-pellyitas muestra una mayor variabilidad y un fuerte control del metadominio donde éstas se desarrollan evidenciando una baja cinética de equilibrio y dejando sólo a aquellas desarrolladas en la matriz como formadas bajo un control composicional efectivo de la roca total. Los arreglos minerales de ambas areas muestran evidencias de haberse formado bajo un mismo evento metamórñco bajo el cual las reacciones se han desarrollado de manera equivalente. Aún así se reconocen diferencias químicas locales que controlan este proceso. Una mayor concentración de CO2 en los fluidos durante el metamorfismo en el area de El Volcán, con respecto al area de Rodeo de los Bueyes, se ve representada en la presencia escasa de prehnita, y abundante de calcita, en sus asociaciones minerales. La presion y temperatura de este evento metamórfico han sido gruesamente estimadas en valores inferiores a 2-3 kbar

  14. [Responsibilities of enterprises introducing new dangerous chemical substances and preparations].

    Science.gov (United States)

    Cieśla, Jacek; Majka, Jerzy

    2004-01-01

    The paper reviews the responsibilities of producers, importers and distributors set in a new Act of January 2001 on chemical substances and preparations (Off. J. 2001, No. 11, item 84, with subsequent amendments). This Act together with executive provisions is aimed at harmonizing Polish legislation with EU requirements. The Act sets conditions, restriction and bans of production placing on the market and use of chemical substances and preparations in order to protect human health and environment against their harmful effects. The Act together with a number of executive provisions render those who introduce dangerous chemicals and chemical preparations, including distributors responsible for: classification and labelling of dangerous chemical substances and preparations; possessing, making available and up-dating safety data sheets; supplying packages containing certain dangerous substances with child-proof fastenings; notifying the Inspector for Chemical Substances and Preparations about placing a dangerous preparation on the market; notifying the Inspector about a new substance and conducting required studies; being properly qualified to handle dangerous substances. The Act strictly defines the term "placing a substance or a preparation on the market"--it means making a substance or a preparation available to third parties on the territory of The Republic of Poland, territories of the Member States of the European Union or the territory of Iceland, Liechtenstein and Norway, unless the Act provides otherwise; it also means introduction of a substance or a preparation from outside of the territory referred to above on the customs territory of The Republic of Poland, or that of the member states of the European Union and other states listed above. In addition, some of the responsibilities defined by the provisions of the law on chemical substances and preparations are also applicable to handling of biocidals, which are classified as dangerous substances. The Act

  15. Relationship of trauma exposure and substance abuse to self-reported violence among men and women in substance abuse treatment.

    Science.gov (United States)

    Clark, C Brendan; Reiland, Sarah; Thorne, Chris; Cropsey, Karen L

    2014-05-01

    Past research showed a relationship between substance abuse and aggression and past trauma and aggression. The nature of the relationships between substance use, trauma, and aggression is inconclusive. The current research hypothesized greater aggression among those with a history of substance abuse and trauma compared with those without such a history and an additive relationship between substance abuse and trauma on aggression. Participants were 615 individuals in a substance abuse treatment program for individuals under criminal justice supervision. Data were collected from face-to-face interviews and self-report measures. Univariate and multivariate analyses assessed the relationships among substance use, trauma, and aggression. Participants with a history of trauma and regular substance use reported the highest rates of homicidal ideation, problem behaviors, and person offenses. Participants in this group also reported greater desire for help managing their stress and tension, dealing with problems in their intimate relationships, developing healthier relationships in general, and learning prosocial approaches to express their feelings. Substance abusing participants who experienced trauma reported more externalizing behaviors and a greater desire for coping- and social-skills training than participants who abused substances but did not report a history of trauma. This suggests that participants in substance abuse treatment programs may have improved outcomes with the addition of components to address these issues.

  16. Substance use and abuse among patients with comorbid dysthymia and substance disorder.

    Science.gov (United States)

    Eames, S L; Westermeyer, J; Crosby, R D

    1998-11-01

    This study determines the substance use and abuse patterns among patients with comorbid substance-related disorder (SRD) and dysthymia in SRD-dysthymia as compared with patients with SRD only. Differences in use and abuse patterns could be useful for (a) understanding motivations for use, such as self-treatment, and (b) assisting clinicians to identify cases of dysthymia among SRD patients. Retrospective and current data were obtained regarding history of substance use and current SRD diagnoses. Two university medical centers with alcohol-drug programs located within departments of psychiatry were the settings. A total of 642 patients was assessed. of whom 39 had SRD-dysthymia and 308 had SRD only. Data on past usc were collected by a research associate using a questionnaire. Current SRD and dysthymia diagnoses were made by psychiatrists specializing in addiction. The patients with SRD-dysthymia and SRD only did not differ with regard to use of alcohol, tobacco, and benzodiazepines. The patients with SRD-dysthymia started caffeine use at an earlier age, had shorter "use careers" of cocaine, amphetamines, and opiates, and had fewer days of cocaine and cannabis use in the last year. They also had a lower rate of cannabis abuse/dependence. This study indicated that patients with dysthymia and SRD have exposure to most substances of abuse that is comparable to patients with SRD only. However, they selectively use certain substances less often than patients with SRD only. Early use of caffeine may reflect self-treatment for depressive symptoms among patients with SRD-dysthymia.

  17. Internet Addiction pada Remaja Pelaku Substance Abuse: Penyebab atau Akibat?

    Directory of Open Access Journals (Sweden)

    Ajeng Intan Nur Rahmawati

    2018-06-01

    Full Text Available The purpose of this article to find out which variables are the causes and effects between substancial abuse and internet addiction through conceptual studies.Internet addiction and substance abuse are known to have correlation.But this becomes overlapping, which is the cause andthe result. The results of this conceptual study explain that adolescents who experience substance abuse will tend tobe the cause of increased prevalenceinternet addiction, because the use of addictive substances will determine how fast internet addiction develops. Conversely, adolescents who experience Internet addiction is not necessarily the cause of the emergence of substance abuse. It can be concluded that substance abuse is the cause of high levels of internet addiction in adolescents, likewisethe internet addiction has the potential to cause substance abuse

  18. Kleptomania: clinical characteristics and relationship to substance use disorders.

    Science.gov (United States)

    Grant, Jon E; Odlaug, Brian L; Kim, Suck Won

    2010-09-01

    Although categorized as an impulse control disorder, kleptomania has many features in common with substance use disorders. This paper sought to examine the mounting evidence supporting the phenomenological, clinical, epidemiological, and biological links between kleptomania and substance addictions. A review of the literature examining family history, genetics, comorbid psychiatric conditions, neuroimaging, and phenomenology was utilized to examine the relationship of kleptomania to substance addiction. Kleptomania and substance addiction share common core qualities, including similar treatment successes, as well as etiologic and phenomenological similarities. Future research investigating the relationship between kleptomania and substance use disorders holds significant promise in advancing prevention and treatment strategies for addiction in general. Research investigating kleptomania (and other behavioral addictions) and its relationship to substance addiction holds significant promise in advancing prevention and treatment strategies for addiction in general.

  19. Metal homeostasis in Hypogymnia physodes is controlled by lichen substances.

    Science.gov (United States)

    Hauck, Markus

    2008-05-01

    The hypothesis was tested that the lichen substances produced by the epiphytic lichen Hypogymnia physodes control the intracellular uptake of divalent transition metals. Incubating lichen thalli with and without their natural content of lichen substances with metal solutions showed that the lichen substances of H. physodes selectively inhibit the uptake of Cu(2+) and Mn(2+), but not of Fe(2+) and Zn(2+). Such behavior is ecologically beneficial, as ambient concentrations of Cu(2+) and Mn(2+) in precipitation and bark are known to limit the abundance of H. physodes, whereas limiting effects of Fe(2+) or Zn(2+) have never been found. This suggests that increasing the Cu(2+) and Mn(2+) tolerance stimulated the evolution of lichen substances in H. physodes. The depsidone physodalic acid is apparently most effective at reducing Cu(2+) and Mn(2+) uptake among the seven lichen substances produced by H. physodes. Probably lichen substances play a general role in the metal homeostasis of lichens.

  20. Brief Family Based Intervention for Substance Abusing Adolescents

    Science.gov (United States)

    Hernandez, Lynn; Rodriguez, Ana Maria; Spirito, Anthony

    2015-01-01

    Synopsis Research has consistently shown that a lack of parental involvement in the activities of their children predicts initiation and escalation of substance use. Parental monitoring, as well as youth disclosure about their whereabouts, parent child communication, positive parenting and family management strategies, e.g., consistent limit setting, and parental communication about and disapproval of substance use, have all been shown to protect against adolescent substance abuse and substance problems. Given the empirical evidence, family and parenting approaches to preventing and intervening on adolescent substance misuse have received support in the literature. This article discusses the theoretical foundations as well as the application of the Family Check-up, a brief family-based intervention for adolescent substance use. PMID:26092741

  1. Per and polyfluorinated substances in the Nordic Countries

    DEFF Research Database (Denmark)

    Posner, Stefan; Roos, Sandra; Brunn Poulsen, Pia

    This Tema Nord report presents a study based on open information and custom market research to review the most common perfluorinated substances (PFC) with less focus on PFOS and PFOA. The study includes three major parts: 1) Identification of relevant per-and polyfluorinated substances and their ......This Tema Nord report presents a study based on open information and custom market research to review the most common perfluorinated substances (PFC) with less focus on PFOS and PFOA. The study includes three major parts: 1) Identification of relevant per-and polyfluorinated substances...... and their use in various industrial sectors in the Nordic market by interviews with major players and database information 2) Emissions to and occurence in the Nordic environment of the substances described in 1) 3) A summary of knowledge of the toxic effects on humans and the environment of substances...

  2. Characterization of Mexican zeolite minerals; Caracterizacion de minerales zeoliticos mexicanos

    Energy Technology Data Exchange (ETDEWEB)

    Jimenez C, M.J

    2005-07-01

    50% of the Mexican territory is formed by volcanic sequences of the Pliocene type, which appear extensively in the northwest states (Sonora, Sinaloa, Chihuahua, Durango) and west of Mexico (Jalisco and Nayarit), in central Mexico (Zacatecas, Guanajuato, San Luis Potosi, Queretaro, Hidalgo) and south of Mexico (Guerrero, Oaxaca); therefore, it is to be expected that in our country big locations of natural zeolites exist in its majority of the clinoptilolite type. The present study was focused toward the characterization of two Mexican natural zeolite rocks presumably of the clinoptilolite and filipsite types, one of them comes from the state of Chihuahua and the other of a trader company of non metallic minerals, due that these materials are not characterized, its are not known their properties completely and therefore, the uses that can be given to these materials. In this investigation work it was carried out the characterization of two Mexican zeolite rocks, one coming from the Arroyo zone, municipality of La Haciendita, in the state of Chihuahua; and the other one was bought to a trader company of non metallic minerals. The two zeolites so much in their natural form as conditioned with sodium; they were characterized by means of X-ray diffraction, scanning electron microscopy of high vacuum and elementary microanalysis (EDS), surface area analysis (BET), thermal gravimetric analysis. To differentiate the heulandite crystalline phase of the other clinoptilolite rock, its were carried out thermal treatments. The quantification of Al, Na, Ca, K, Mg, Fe was carried out in solution, by means of atomic absorption spectroscopy and the quantity of Si was determined by gravimetry. The zeolite rocks presented for the major part the crystalline heulandite and clinoptilolite phases for the most part, and it was found that the zeolite coming from the state of Chihuahua possesses a bigger content of heulandite and the denominated filipsite it is really a zeolite clinoptilolite type. When comparing the obtained results of the elementary composition of the natural Mexican zeolites with those of zeolites clinoptilolite type from other places of the world it was found that the composition is similar as for its components and different as for its concentration. (Author)

  3. Characterization of clay minerals; Caracterizacion de minerales arcillosos

    Energy Technology Data Exchange (ETDEWEB)

    Diaz N, C.; Olguin, M.T.; Solache R, M.; Alarcon H, T.; Aguilar E, A. [Gerencia de Ciencias Basicas, Direccion de Investigacion Cientifica, Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2002-07-01

    The natural clays are the more abundant minerals on the crust. They are used for making diverse industrial products. Due to the adsorption and ion exchange properties of these, a great interest for developing research directed toward the use of natural clays for the waste water treatment has been aroused. As part of such researches it is very important to carry out previously the characterization of the interest materials. In this work the results of the mineral and elemental chemical composition are presented as well as the morphological characteristics of clay minerals from different regions of the Mexican Republic. (Author)

  4. Cáncer-vitaminas-minerales: Relación compleja

    OpenAIRE

    Adrianza de Baptista, Gertrudis; Murillo Melo, Carolain

    2014-01-01

    Dado que la nutrición puede influenciar el proceso de carcinogénesis, los objetivos de este estudio son revisar la relación del estado nutricional y el cáncer considerando el papel de los micronutrientes como parte de la terapéutica en el paciente oncológico, así mismo su relación déficit y exceso en esta patología. La pérdida de peso del paciente se asocia con el tipo de tumor canceroso, ubicación, estadio, entre otras cosas, y de forma importante con los efectos psicógenos, anorexígenos, de...

  5. A new technique for radiolabelling of humic substances

    Energy Technology Data Exchange (ETDEWEB)

    Franke, K.; Patt, J.T.; Patt, M.; Kupsch, H.; Steinbach, J. [Inst. of Interdisciplinary Isotope Research, Leipzig (Germany)

    2004-07-01

    A new method of radiolabelling of humic substances (HS) in the aqueous phase has been developed. Radiolabelling with the short-lived positron-emitter {sup 18}F was carried out via diazonium coupling to electron-rich aromatic residues of the humic substances. Labelling yields of up to 75% were obtained after optimization of the synthetic procedure. Introductory experimental steps were performed for testing the labelling stability of the humic substances with ultrafiltration, electrophoretic and chromatographic methods. (orig.)

  6. Symbolism and rationality in the politics of psychoactive substances.

    Science.gov (United States)

    Room, Robin

    2005-01-01

    Psychoactive substances take on many symbolic meanings, and thus the politics of psychoactive substances has featured symbolic elements, or value-based rationality, alongside and often dominating instrumental rationality. Drawing particularly on the work of Joseph Gusfield and Nordic scholars, the chapter considers the symbolic dimension in the politics of substance use, even in Nordic countries celebrated for their societal commitment to knowledge-based policymaking, and its effects on the interplay of science and policy.

  7. Coordination of Care in Substance Abuse Treatment: An Interorganizational Perspective

    OpenAIRE

    Spear, Suzanne Evelyn

    2012-01-01

    The high cost of detoxification (detox) services and health risks associated with continued substance abuse make readmission to detox an important indicator of poor performance for substance abuse treatment systems. One major service gap in the continuum of care for substance use disorders associated with readmissions is not transitioning patients to rehabilitation after a detox service. This study examined the problem of detox readmissions from an interorganizational network perspective. The...

  8. A new technique for radiolabelling of humic substances

    International Nuclear Information System (INIS)

    Franke, K.; Patt, J.T.; Patt, M.; Kupsch, H.; Steinbach, J.

    2004-01-01

    A new method of radiolabelling of humic substances (HS) in the aqueous phase has been developed. Radiolabelling with the short-lived positron-emitter 18 F was carried out via diazonium coupling to electron-rich aromatic residues of the humic substances. Labelling yields of up to 75% were obtained after optimization of the synthetic procedure. Introductory experimental steps were performed for testing the labelling stability of the humic substances with ultrafiltration, electrophoretic and chromatographic methods. (orig.)

  9. Adolescent Suicidal Behavior and Substance Use: Developmental Mechanisms

    Directory of Open Access Journals (Sweden)

    Donald M. Dougherty

    2008-01-01

    Full Text Available Adolescent suicidal behaviors and substance use are disturbingly common. Research suggests overlap of some of the etiological mechanisms for both adolescent suicidal behavior and substance use, yet clear understanding of the complex relations between these behaviors and their causal underpinnings is lacking. A growing body of evidence and a diathesis model (Mann et al. 1999; Mann, 2003 highlight the importance of impulse control as a proximal risk factor for adolescent suicidal and substance use behaviors. This literature review extends current theory on the relationships between adolescent suicidal behavior and substance use by: (1 examining how, when, and to what extent adolescent development is affected by poor impulse control, stressful life events, substance use behavior, and biological factors; (2 presenting proposed causal mechanisms by which these risk factors interact to increase risk for suicidal behaviors and substance use; and (3 proposing specific new hypotheses to extend the diathesis model to adolescents at risk for suicide and substance use. More specifically, new hypotheses are presented that predict bidirectional relationships between stressful life events and genetic markers of 5-HT dysregulation; substance use behavior and impulsivity; and substance use behavior and suicide attempts. The importance of distinguishing between different developmental trajectories of suicidal and substance use behaviors, and the effects of specific risk and protective mechanisms are discussed. Use of new statistical approaches that provide for the comparison of latent growth curves and latent class models is recommended to identify differences in developmental trajectories of suicidal behavior and substance use. Knowledge gained from these prospective longitudinal methods should lead to greater understanding on the timing, duration, and extent to which specific risk and protective factors influence the outcomes of suicidal behavior and substance

  10. Patterns of current and lifetime substance use in schizophrenia.

    Science.gov (United States)

    Fowler, I L; Carr, V J; Carter, N T; Lewin, T J

    1998-01-01

    A structured interview and standardized rating scales were used to assess a sample of 194 outpatients with schizophrenia in a regional Australian mental health service for substance use, abuse, and dependence. Case manager assessments and urine drug screens were also used to determine substance use. Additional measurements included demographic information, history of criminal charges, symptom self-reports, personal hopefulness, and social support. The sample was predominantly male and showed relative instability in accommodations, and almost half had a history of criminal offenses, most frequently drug or alcohol related. The 6-month and lifetime prevalence of substance abuse or dependence was 26.8 and 59.8 percent, respectively, with alcohol, cannabis, and amphetamines being the most commonly abused substances. Current users of alcohol comprised 77.3 percent and current users of other nonprescribed substances (excluding tobacco and caffeine) comprised 29.9 percent of the sample. Rates of tobacco and caffeine consumption were high. There was a moderate degree of concordance between case manager determinations of a substance-use problem and research diagnoses. Subjects with current or lifetime diagnoses of substance abuse/dependence were predominantly young, single males with higher rates of criminal charges; however, there was no evidence of increased rates of suicide attempts, hospital admissions, or daily doses of antipsychotic drugs in these groups compared with subjects with no past or current diagnosis of substance abuse or dependence. Subjects with a current diagnosis of substance use were younger at first treatment and currently more symptomatic than those with no past or current substance use diagnosis. The picture emerging from this study replicates the high rate of substance abuse in persons with schizophrenia reported in North American studies but differs from the latter in finding a slightly different pattern of substances abused (i.e., absence of

  11. Substance for thermoluminescent dosimetry of photon radiation in adipose tissue

    International Nuclear Information System (INIS)

    Kalmykov, L.Z.; Kandel', T.G.

    1983-01-01

    Substance composition for thermoluminescent photon dosimetry in adipose tissue is proposed which makes it possible to simplify dosimetric measurements and to improve their accuracy. The substance consists of powder-like thermoluminophor Li 2 B 4 O 7 (0.03%Mn) 48-52 mass % and bistriethylammonium dodecahydrododecaborane - 48-52 mass %. The above substance is equivalent in respect to dosimetry to adipose tissue within the 10 keV - 10 MeV energy range

  12. Trends in substance use admissions among older adults.

    Science.gov (United States)

    Chhatre, Sumedha; Cook, Ratna; Mallik, Eshita; Jayadevappa, Ravishankar

    2017-08-22

    Substance abuse is a growing, but mostly silent, epidemic among older adults. We sought to analyze the trends in admissions for substance abuse treatment among older adults (aged 55 and older). Treatment Episode Data Set - Admissions (TEDS-A) for period between 2000 and 2012 was used. The trends in admission for primary substances, demographic attributes, characteristics of substance abused and type of admission were analyzed. While total number of substance abuse treatment admissions between 2000 and 2012 changed slightly, proportion attributable to older adults increased from 3.4% to 7.0%. Substantial changes in the demographic, substance use pattern, and treatment characteristics for the older adult admissions were noted. Majority of the admissions were for alcohol as the primary substance. However there was a decreasing trend in this proportion (77% to 64%). The proportion of admissions for following primary substances showed increase: cocaine/crack, marijuana/hashish, heroin, non-prescription methadone, and other opiates and synthetics. Also, admissions for older adults increased between 2000 and 2012 for African Americans (21% to 28%), females (20% to 24%), high school graduates (63% to 75%), homeless (15% to 19%), unemployed (77% to 84%), and those with psychiatric problems (17% to 32%).The proportion of admissions with prior history of substance abuse treatment increased from 39% to 46% and there was an increase in the admissions where more than one problem substance was reported. Ambulatory setting continued to be the most frequent treatment setting, and individual (including self-referral) was the most common referral source. The use of medication assisted therapy remained low over the years (7% - 9%). The changing demographic and substance use pattern of older adults implies that a wide array of psychological, social, and physiological needs will arise. Integrated, multidisciplinary and tailored policies for prevention and treatment are necessary to

  13. Repercusión de los principales factores de riesgo biopsicosociales de la violencia sobre la trabajadora estudiante Impact of the main biopsychosocial risk factors of violence on the working student

    Directory of Open Access Journals (Sweden)

    Dora Lidia Arce Gómez

    2013-03-01

    Full Text Available Se realizó un estudio descriptivo y transversal de 32 alumnas de primer año de enfermería, seleccionadas al azar de 85 integrantes del curso para trabajadores en la Facultad de Enfermería, perteneciente a la Universidad de Ciencias Médicas de Santiago de Cuba, durante los meses de noviembre y diciembre de 2011, previa solicitud de su consentimiento por escrito para participar en la investigación. Las variables analizadas para ello fueron: edades, personas causantes de la violencia, tipos de violencia y autoestima. Entre los principales resultados sobresalió la primacía del jefe inmediato superior como perpetrador de los comportamientos agresivos, del maltrato verbal como modalidad utilizada para la ofensa y de la autoestima baja. Se halló también que ese problema biopsicosocial afecta aún a numerosas mujeres en Cuba y el mundo, por lo cual se requieren acciones mancomunadas de diversos sectores de la sociedad y de la propia fémina maltratada para disminuir o eliminar su ocurrencia.A descriptive cross-sectional study was carried out in 32 first year-students of nursing, randomly selected from 85 members of the course for workers at the Faculty of Nursing, belonging to the Medical University of Santiago de Cuba, during November and December 2011, on request of their written consent to participate in the research. The variables for this were age, people using violence, types of violence and self-esteem. Among the main results were the primacy of immediate superior as a perpetrator of aggressive behaviors, verbal abuse as modality used for insult and low self-esteem. It was also found that this biopsychosocial problem still affects many women in Cuba and in the world, which will require joint actions of different sectors of the society and of the battered woman to reduce or eliminate its occurrence.

  14. El proyecto Epicardian: un estudio de cohortes sobre enfermedades y factores de riesgo cardiovasculares en ancianos españoles: consideraciones metodológicas y principales hallazgos demográficos

    Directory of Open Access Journals (Sweden)

    Rafael Gabriel Sánchez

    2004-01-01

    Full Text Available Fundamentos: A pesar de que la incidencia de cardiopatía isquémica es más alta en sujetos mayores de 65 años, la mayor parte de la investigación cardiovascular se ha centrado en la población adulta de mediana edad, careciendo en España hasta la fecha de un estudio de cohortes en este grupo de población. El objetivo de este trabajo es revisar el papel y la metodología de los estudios de cohortes como herramienta epidemiológica imprescindible para la investigación de la prevalencia e incidencia de angina, IAM, ictus, y sus principales factores de riesgo cardiovascular. Métodos: Estudio de cohortes en tres zonas de España: Madrid (barrio de Lista, Arévalo (Avila y Begonte (Lugo. Muestra aleatoria estratificada por edad y sexo a partir de los padrones municipales de cada zona y municipio (n=5,079. Evaluación basal de la cohorte en dos fases: domiciliaria mediante encuesta estructurada para cribado de enfermedad isquémica cardiaca y factores de riesgo clásicos (hipertensión, dislipemia, diabetes y tabaquismo y clínica para confirmación de casos. En la fase de seguimiento se utilizó el «método de búsqueda en frío» del proyecto MONICA modificado para la búsqueda e indagación de casos incidentes usando todos los informes clínicos hospitalarios y de atención primaria para la confirmación del evento cardiovascular. Adicionalmente se solicitó al INE información sobre causa y fecha de la muerte de los individuos de la cohorte fallecidos...

  15. Canales de distribución: características principales de los distribuidores mayoristas de materiales de construcción de extracción minera en Barranquilla - Colombia

    Directory of Open Access Journals (Sweden)

    Candelaria Sierra

    2015-09-01

    Full Text Available El objetivo general del presente artículo de investigación consiste en comprender las principales características de los distribuidores mayoristas que componen los canales de distribución de los materiales de construcción de extracción minera en la ciudad de Barranquilla-Colombia, delimitándolo en las siguientes cuatro dimensiones: la operación logística, el nivel de servicio al cliente, las características de la concentración de poder y los conflictos que se presentan entre sus miembros. Los materiales de construcción son una cadena productiva de importancia en el desarrollo social y económico del país y no hay investigaciones recientes sobre el comportamiento de los canales de distribución del sector en Barranquilla- Colombia. La metodología de investigación que se utilizó fue el método del caso mediante la aplicación de entrevistas dirigidas a funcionarios de los distribuidores mayoristas más representativos de la ciudad de Barranquilla como son la Ferretería Samir, la Ferretería Metrópolis y Granitos de la Costa. Se concluye que los transportadores son las unidades especializadas del canal de distribución, ya que permiten el movimiento del producto desde las canteras. Así mismo la decisión de empacar y de transportar aglomerado por parte de los distribuidores mayoristas ha cambiado la estructura de los canales de distribución. El poder se concentra en los transportadores y en los distribuidores mayoristas y finalmente no se encontraron evidencias de conflictos entre los distribuidores mayoristas.

  16. Investigación: Fundamentos teóricos de la corriente de investigación sobre relevancia valorativa Principales contribuciones de la investigación sobre intangibles orientada hacia el mercado de capitales

    Directory of Open Access Journals (Sweden)

    Cecilia Rita Ficco

    2016-10-01

    Full Text Available El presente trabajo tiene por objetivo exponer y analizar los principalesfundamentos teóricos y conceptuales de la corriente de investigaciónsobre relevancia valorativa, contextualizándola dentro de la investigaciónorientada al mercado de capitales y del paradigma utilitarista, asícomo presentar algunos de los principales resultados que se han logradoa través de las investigaciones que, enmarcadas en dicha corriente, hanexaminado la relevancia valorativa de los intangibles. Metodológicamente,se ha realizado una investigación descriptiva y de tipo documental. Seconcluye que la corriente de investigación sobre relevancia valorativa, queencuentra en el modelo de Ohlson (1995 un sólido fundamento teórico,tiene dentro de sus líneas más prolíficas y con mayores perspectivas afuturo, a aquella tendiente a demostrar la relevancia valorativa de losintangibles en los mercados de capitales. Los resultados de las investigacionesrealizadas en esta línea han aportado evidencias claras acercade la importancia de los intangibles para la valoración de las empresas,los que resultan de sumo interés tanto para el ámbito académico comopara los organismos emisores de normas contables, ya que proporcionan una base sólida para decidir qué información debe ser incluida en losestados financieros con el fin de incrementar su utilidad, lo que resultafundamental para la mejora del modelo contable actual.

  17. La formación del obrero en la Europa de entreguerras (1919-1939: las principales instituciones socialistas y las internacionales obreras de la enseñanza

    Directory of Open Access Journals (Sweden)

    Franciso de LUIS MARTÍN

    2010-02-01

    Full Text Available Recientemente, Juan Pablo Fusi ha puesto de relieve cómo al sentimiento de exaltación nacionalista y belicista que provocó el estallido de la I Guerra Mundial, y al que no fue ajeno buena parte del movimiento obrero europeo, siguió, con la prolongación del conflicto, una profunda modificación de la conciencia moral e intelectual en Europa que cristalizaría en una cultura del pesimismo, cuando no en una clara y resuelta actitud de rechazo a la civilización europea. Si la guerra había demostrado la caducidad de muchos viejos valores y de no pocas instituciones, puso de manifiesto, sobre todo, la urgente necesidad de modificar los anticuados sistemas de educación que, sometidos a los intereses político-ideológicos de los gobiernos y dominados por prejuicios nacionalistas, habían coadyuvado a hacer posible la conflagración bélica. Un amplio y significativo movimiento de regeneración educativa recorrió los ambientes intelectuales europeos. En las circunstancias de la inmediata posguerra muchos fueron, y no sólo dentro del campo específico de la pedagogía o la enseñanza, los que volvieron sus ojos a la escuela, a la educación popular, como uno de los principales mecanismos de regeneración social. Una nueva escuela, se repetía desde diferentes foros, debía contribuir a crear una nueva humanidad.

  18. Producing, Importing, and Exporting Ozone-Depleting Substances

    Science.gov (United States)

    Overview page provides links to information on producing, importing, and exporting ozone-depleting substances, including information about the HCFC allowance system, importing, labeling, recordkeeping and reporting.

  19. Perceived harmfulness of substance use: A pilot study

    Directory of Open Access Journals (Sweden)

    Siddharth Sarkar

    2014-01-01

    Full Text Available Background: Harm ratings of substances help in understanding the perception toward substance use and formulating policies. Evidence of such harm ratings by substance users and their caregivers provides a clearer perspective of those who experience and observe such harm closely. Materials and Methods: Substance users and their caregivers were recruited from the Drug De-addiction and Treatment Centre of PGIMER, Chandigarh. Sociodemographic details of the subjects were noted. The subjects were then asked to rate a list of psychoactive preparations according to the harms they thought the preparation caused. The list of substances was developed taking into consideration substance commonly encountered in the geographical area. The harm ratings were transformed on a scale of 0-100. Results: All subjects were males and majority of them were educated above 10 th standard, were not employed and belonged to urban background. Most of them had taken psychoactive substances in their lifetimes but were currently abstinent. Most of the subjects endorsed intravenous drugs as the most harmful, followed by heroin. Beer and chewable tobacco considered the least harmful substances. Greater degree of education was associated with lower harm rankings for heroin, cannabis, dextropropoxyphene, and raw opium; while urban residence was associated with greater harm ratings for cannabis and raw opium. Differences in the harms were perceived for different preparations of the same active compound for alcohol and nicotine. Conclusion: Harm ratings of substances can be a useful guide while formulating policies and allocating resources. Need for further research extending this pilot study is emphasized.

  20. 76 FR 62449 - Manufacturer of Controlled Substances; Notice of Application

    Science.gov (United States)

    2011-10-07

    ... basic classes of controlled substances: Drug Schedule Marihuana (7360) I Tetrahydrocannabinols (7370) I The company plans to cultivate marihuana for the National Institute on Drug Abuse for research...

  1. DSM-5 Criteria for Substance Use Disorders: Recommendations and Rationale

    Science.gov (United States)

    Hasin, Deborah S.; O’Brien, Charles P.; Auriacombe, Marc; Borges, Guilherme; Bucholz, Kathleen; Budney, Alan; Compton, Wilson M.; Crowley, Thomas; Ling, Walter; Petry, Nancy M.; Schuckit, Marc; Grant, Bridget F.

    2013-01-01

    Since DSM-IV was published in 1994, its approach to substance use disorders has come under scrutiny. Strengths were identified (notably, reliability and validity of dependence), but concerns have also arisen. The DSM-5 Substance-Related Disorders Work Group considered these issues and recommended revisions for DSM-5. General concerns included whether to retain the division into two main disorders (dependence and abuse), whether substance use disorder criteria should be added or removed, and whether an appropriate substance use disorder severity indicator could be identified. Specific issues included possible addition of withdrawal syndromes for several substances, alignment of nicotine criteria with those for other substances, addition of biomarkers, and inclusion of nonsubstance, behavioral addictions. This article presents the major issues and evidence considered by the work group, which included literature reviews and extensive new data analyses. The work group recommendations for DSM-5 revisions included combining abuse and dependence criteria into a single substance use disorder based on consistent findings from over 200,000 study participants, dropping legal problems and adding craving as criteria, adding cannabis and caffeine withdrawal syndromes, aligning tobacco use disorder criteria with other substance use disorders, and moving gambling disorders to the chapter formerly reserved for substance-related disorders. The proposed changes overcome many problems, while further studies will be needed to address issues for which less data were available. PMID:23903334

  2. Isolation and identification of an allelopathic substance from Hibiscus sabdariffa.

    Science.gov (United States)

    Suwitchayanon, Prapaipit; Pukclai, Piyatida; Ohno, Osamu; Suenaga, Kiyotake; Kato-Noguchi, Hisashi

    2015-05-01

    In this study, an allelopathic substance was isolated from an aqueous methanol extract of Hibiscus sabdariffa L. by column chromatography and reverse phase HPLC. The chemical structure of the substance was determined by 1H NMR spectroscopy and mass spectrometry as trimethyl allo-hydroxycitrate. Trimethyl allo-hydroxycitrate inhibited the growth of cress hypocotyls and roots at concentrations greater than 10 mM. The concentrations required for 50% growth inhibition of the hypocotyls and roots of cress were 20.3 and 14.4 mM, respectively. The inhibitory activity of trimethyl allo-hydroxycitrate suggests that the substance may act as an allelopathic substance of H. sabdariffa.

  3. DSM-5 criteria for substance use disorders: recommendations and rationale.

    Science.gov (United States)

    Hasin, Deborah S; O'Brien, Charles P; Auriacombe, Marc; Borges, Guilherme; Bucholz, Kathleen; Budney, Alan; Compton, Wilson M; Crowley, Thomas; Ling, Walter; Petry, Nancy M; Schuckit, Marc; Grant, Bridget F

    2013-08-01

    Since DSM-IV was published in 1994, its approach to substance use disorders has come under scrutiny. Strengths were identified (notably, reliability and validity of dependence), but concerns have also arisen. The DSM-5 Substance-Related Disorders Work Group considered these issues and recommended revisions for DSM-5. General concerns included whether to retain the division into two main disorders (dependence and abuse), whether substance use disorder criteria should be added or removed, and whether an appropriate substance use disorder severity indicator could be identified. Specific issues included possible addition of withdrawal syndromes for several substances, alignment of nicotine criteria with those for other substances, addition of biomarkers, and inclusion of nonsubstance, behavioral addictions.This article presents the major issues and evidence considered by the work group, which included literature reviews and extensive new data analyses. The work group recommendations for DSM-5 revisions included combining abuse and dependence criteria into a single substance use disorder based on consistent findings from over 200,000 study participants, dropping legal problems and adding craving as criteria, adding cannabis and caffeine withdrawal syndromes, aligning tobacco use disorder criteria with other substance use disorders, and moving gambling disorders to the chapter formerly reserved for substance-related disorders. The proposed changes overcome many problems, while further studies will be needed to address issues for which less data were available.

  4. Photoprotective substance occurs primarily in outer layers of fish skin.

    Science.gov (United States)

    Fabacher, D L; Little, E E

    1998-01-01

    Methanol extracts of dorsal skin layers, eyes, gills, and livers from ultraviolet-B (UVB) radiation-sensitive and UVB-tolerant species of freshwater fish were examined for a substance that appears to be photoprotective. Significantly larger amounts of this substance were found in extracts of outer dorsal skin layers from both UVB-sensitive and UVB-tolerant fish when compared with extracts of inner dorsal skin layers. This substance occurred in minor amounts or was not detected in eye, gill, and liver extracts. The apparent primary function of this substance in fish is to protect the cells in outer dorsal skin layers from harmful levels of UVB radiation.

  5. Getting boozy in books: substance use in adolescent literature.

    Science.gov (United States)

    Coyne, Sarah M; Callister, Mark; Phillips, James C

    2011-09-01

    Media effects research provides evidence for a link between adolescent exposure to media portrayals of substance use and usage. Exposure to media content that glamorizes and normalizes substance use carries potential public health risks. Though substance use has been examined in other media, such as film, television, and magazines, no research to date examines usage portrayals in adolescent novels. Given that adolescents do read, and given the potential impact of content on adolescent attitudes and behavior, this study provides a detailed analysis of the frequency and nature of substance use in the understudied area of novels. Substance use was examined in 40 best-selling adolescent novels on the New York Times Best Sellers list (time span June-July 2008). Substance use varied widely. Of the various types of substances, alcohol portrayals were most common. Almost all substance use was portrayed as having no consequences. Alcohol use was portrayed in similar frequencies in books aimed at younger, middle, and older adolescents, though illegal drug use was more likely to be found in books aimed at older ages. Our results suggest that the manner in which substance use is generally portrayed may encourage use among adolescents. Researchers, parents, and adolescents are encouraged to examine books as one potentially overlooked area of influence.

  6. Stimulant ADHD medication and risk for substance abuse.

    Science.gov (United States)

    Chang, Zheng; Lichtenstein, Paul; Halldner, Linda; D'Onofrio, Brian; Serlachius, Eva; Fazel, Seena; Långström, Niklas; Larsson, Henrik

    2014-08-01

    There are persistent concerns of long-term effects of stimulant ADHD medication on the development of substance abuse. Using Swedish national registers, we studied all individuals born between 1960 and 1998 and diagnosed with ADHD (26,249 men and 12,504 women). We investigated the association between stimulant ADHD medication in 2006 and substance abuse during 2009. Substance abuse was indexed by substance-related death, crime, or hospital visits. ADHD medication was not associated with increased rate of substance abuse. Actually, the rate during 2009 was 31% lower among those prescribed ADHD medication in 2006, even after controlling for medication in 2009 and other covariates (hazard ratio: 0.69; 95% confidence interval: 0.57-0.84). Also, the longer the duration of medication, the lower the rate of substance abuse. Similar risk reductions were suggested among children and when investigating the association between stimulant ADHD medication and concomitant short-term abuse. We found no indication of increased risks of substance abuse among individuals prescribed stimulant ADHD medication; if anything, the data suggested a long-term protective effect on substance abuse. Although stimulant ADHD medication does not seem to increase the risk for substance abuse, clinicians should remain alert to the potential problem of stimulant misuse and diversion in ADHD patients. © 2013 The Authors. Journal of Child Psychology and Psychiatry © 2013 Association for Child and Adolescent Mental Health.

  7. Epidemiology of Substance Use among University Students in Sudan

    Directory of Open Access Journals (Sweden)

    Tarig Osman

    2016-01-01

    Full Text Available Background. Youth populations are vulnerable to substance use particularly in developing countries where circumstances may be favorable for it. There is no published data on substance use among the youth in Sudan other than on tobacco use. Objectives. The aim of this study was to investigate the prevalence, circumstances, and factors associated with substance use. Methods. An institution-based survey was conducted on a sample of 500 students. Data was collected using a questionnaire designed by the WHO for student drug surveys and analyzed using IBM SPSS version 20. Results. The overall prevalence of substance use is 31%. The current prevalence of tobacco, cannabis, alcohol, amphetamines, tranquilizers, inhalants, opiates, cocaine, and heroin use was 13.7%, 4.9%, 2.7%, 2.4%, 3.2%, 1%, 1.2%, 0.7%, and 0.5%, respectively. Curiosity (33.1% was the main reason for initiation of substance use. The main adverse effects reported were health problems (19.7% and theft (19.7%. Peers (40.9% were the prime source of substance use. On multivariate analysis, male sex was the principle predictor for substance use (AOR: 5.55; 95% CI: 3.38, 9.17. Conclusion. Strategies to control substance use should encompass the role of the university and parents in observing and providing education to improve awareness of substances and their consequences.

  8. Women and substance abuse: gender, age, and cultural considerations.

    Science.gov (United States)

    Stevens, Sally J; Andrade, Rosi A C; Ruiz, Bridget S

    2009-01-01

    Historically, data has shown that a smaller percentage of women use alcohol and illicit substances compared to men, and that frequency of use has been lower among women compared to use among men. Although this data on usage may be true, researchers also acknowledge that substance use among women has been a hidden issue, one not realistically acknowledged by society, especially prior to the mid-1960s. Along with this, more recent data indicates that rates of substance use among women are increasing. Factors contributing to this increase in substance abuse have begun to receive considerable attention, and recent research suggests that many issues exist that are unique to substance use among women. The purpose of this article is to discuss gender specific considerations in women's substance abuse by examining the history of substance use among women; analyzing gender-specific factors, including physiological factors, trauma-related factors, mental health issues, and cultural considerations that impact on women's substance use; articulating treatment approaches for working with substance abusing women and girls; and providing recommendations for further research in this area.

  9. Principales bases legales relacionadas con la expedición y uso de estupefacientes, psicotrópicos y otras sustancias tóxicas en Cuba Main legal bases related to the prescription and use of stupefacients, psychotropic drugs, and other toxicants in Cuba

    Directory of Open Access Journals (Sweden)

    Héctor Barreiro Ramos

    2006-06-01

    Full Text Available Por la importancia que tiene para los médicos, enfermeros, estudiantes, directivos y otros trabajadores y profesionales, no solo del sistema de Salud Pública, sino de otros sectores relacionados, se comprendió la necesidad de intentar recoger en un mismo material toda la legislación posible o basamentos medicolegales relacionados con la expedición y uso de algunas sustancias tóxicas en Cuba, para que estos grupos tuvieran recopilado en un solo texto mucho de lo que está regulado sobre esta temática, y le sea útil como instrumento de trabajo. Se realizó una revisión bibliográfica y documental acerca de las normas legales establecidas en Cuba para el control de las sustancias bajo fiscalización internacional y nacional, muchas de las cuales pueden ser utilizadas con fines no médicos. Se resumen en este documento las bases legales establecidas en leyes, decretos, resoluciones y otros documentos vigentes en nuestro país, y se señalan los principales aspectos contemplados en estos instrumentos jurídicos, muchos de los cuales han repercutido en las modificaciones realizadas en los últimos años en el Código Penal para el control del narcotráfico y el abuso de sustancias reguladas y/o prohibidas. La información obtenida se presenta por temáticas afines, que se agrupan teniendo presente el contenido y comentando las consideraciones pertinentes acorde con la problemática cubana.Due to the great significance for physicians, nurses, students, managers, and other workers and professionals, not only of the Public Health System, but of other related sectors, it was necessary to collect in a same material all the possible legislation or medicolegal foundations related to the prescription and use of some toxicants in Cuba, so that these groups have in only one text most of what is regulated on this topic to be use as a working tool. A bibliographical and documentary review was made on legal norms established in Cuba for the control of

  10. Measurement and analysis of radioactive substances

    International Nuclear Information System (INIS)

    2001-01-01

    Here are gathered the abstracts presented to the 3. summer university of the year 2001 whose main themes were the destructive (5 conferences) and nondestructive (8 conferences) analyses applied to nuclear industry. The points of view of different organisms (as DSIN: Directorate for the Safety of Nuclear Installations, IPSN: Institute of Nuclear Protection and Safety, OPRI: Office of Protection against Ionizing Radiations, TUI: Institute for Transuranium Elements, COGEMA, EDF: Electric Utilities, ANDRA: French National Agency for Radioactive Waste Management, CRLC Val d'Aurelle, France) concerning the needs involved in nuclear facilities control, the methods of radionuclide speciation in use internationally, the measurements and analyses of radioactive substances are given too as well as some general concepts concerning 1)the laser-matter interaction 2)the ions production 3)the quality applied to the measurements and analyses 4)the standard in activity metrology. (O.M.)

  11. Neurotensin: A role in substance use disorder?

    Science.gov (United States)

    Ferraro, Luca; Tiozzo Fasiolo, Laura; Beggiato, Sarah; Borelli, Andrea C; Pomierny-Chamiolo, Lucyna; Frankowska, Malgorzata; Antonelli, Tiziana; Tomasini, Maria C; Fuxe, Kjell; Filip, Malgorzata

    2016-02-01

    Neurotensin is a tridecapeptide originally identified in extracts of bovine hypothalamus. This peptide has a close anatomical and functional relationship with the mesocorticolimbic and nigrostriatal dopamine system. Neural circuits containing neurotensin were originally proposed to play a role in the mechanism of action of antipsychotic agents. Additionally, neurotensin-containing pathways were demonstrated to mediate some of the rewarding and/or sensitizing properties of drugs of abuse.This review attempts to contribute to the understanding of the role of neurotensin and its receptors in drug abuse. In particular, we will summarize the potential relevance of neurotensin, its related compounds and neurotensin receptors in substance use disorders, with a focus on the preclinical research. © The Author(s) 2016.

  12. Neutron activation analysis of high purity substances

    International Nuclear Information System (INIS)

    Gil'bert, Eh.N.

    1987-01-01

    Peculiarities of neutron-activation analysis (NAA) of high purity substances are considered. Simultaneous determination of a wide series of elements, high sensitivity (the lower bound of determined contents 10 -9 -10 -10 %), high selectivity and accuracy (Sr=0.10-0.15, and may be decreased up to 0.001), possibility of analysis of the samples from several micrograms to hundreds of grams, simplicity of calibration may be thought NAA advantages. Questions of accounting of NAA systematic errors associated with the neutron flux screening by the analysed matrix and with production of radionuclides of determined elements from accompanying elements according to concurrent nuclear reactions, as well as accounting of errors due to self-absorption of recorded radiation by compact samples, are considered

  13. Inactivation of biological substances by local heating

    Energy Technology Data Exchange (ETDEWEB)

    Saito, Masahiro [Kyoto Univ., Kumatori, Osaka (Japan). Research Reactor Inst.

    1982-09-01

    Mechanism of inactivation of biological substances caused by local heating was investigated. The effect of hot-zone formation by local heating on reaction of radicals was previously evaluated. The thermal increase in a hot zone due to low energy LET x-rays had little effect on reactibility of the radicals, but, in a hot zone caused by high energy LET x-rays, formed radicals seemed immediately react to active biological molecules to inactivate them. Direct thermal effect on biological molecules was analysed. Thermal increase in a hot zone may induce degenaration of biological molecules which seems to occur in a short time judged from the extension of a hot zone and the duration of high temperature.

  14. Extraction of scandium by organic substance melts

    International Nuclear Information System (INIS)

    Gladyshev, V.P.; Lobanov, F.I.; Zebreva, A.I.; Andreeva, N.N.; Manuilova, O.A.; Il'yukevich, Yu.A.

    1984-01-01

    Regularities of scandium extraction by the melts of octadecanicoic acid, n-carbonic acids of C 17 -C 20 commerical fraction and mixtures of tributylphosphate (TBP) with paraffin at (70+-1) deg C have been studied. The optimum conditions for scandium extraction in the melt of organic substances are determined. A scheme of the extraction by the melts of higher carbonic acids at ninitial metal concentrations of 10 -5 to 10 -3 mol/l has been suggested. The scandium compound has been isolated in solid form, its composition having been determined. The main advantages of extraction by melts are as follows: a possibility to attain high distribution coefficients, distinct separation of phases after extraction, the absence of emulsions, elimination of employing inflammable and toxic solvents, a possibility of rapid X-ray fluorescence determinatinon of scandium directly in solid extract

  15. Bioactive substances of the Techirghiol therapeutic mud

    Directory of Open Access Journals (Sweden)

    Mihail Hoteteu

    2018-02-01

    Full Text Available The study aims to characterize Techirghiol's sapropelic mud both by determining the organic and inorganic composition of the constituent phases and by isolating some compounds of humic substances. The distribution between the solid and liquid phases of the peloid of the Ca2+, Mg2+, Fe3+cations, PO43- anion, bioactive compounds of the protein, lipid and carbohydrate classes as well as the phosphatase activity of Techirghiol sapropelic mud are analyzed. The mud is fractionated using the pH and solvent polarity variation and is spectrophotometrically characterized based on absorption in the wavelength range 340-700 nm humic acids and fulvic acids differentiated on the basis of solubility and molecular mass.

  16. Persistent toxic substances: sources, fates and effects.

    Science.gov (United States)

    Wong, Ming H; Armour, Margaret-Ann; Naidu, Ravi; Man, Ming

    2012-01-01

    Persistent toxic substances (PTS) include the Stockholm persistent organic pollutants, like dichlorodiphenyltrichloroethane, polychlorinated biphenyls, dioxin/furan, etc., and organometallic compounds, like organomercury, organotin, and organolead, which all share the same characteristics of being persistent, toxic, bioaccumulative, and able to travel long distances through different media. The adverse health effects of some of the emerging chemicals like pentabromodiphenyl ether, bisphenol A, and di(2-ethylhexyl)phthalate, which are widely used in daily appliances (e.g., TVs, computers, mobile phones, plastic baby bottles), have become a public health concern due to more evidence now available showing their adverse effects like disturbance of the endocrine system and cancer. This article is an attempt to review the current status of PTS in our environment, citing case studies in China and North America, and whether our existing drinking water treatment and wastewater treatment processes are adequate in removing them from water. Some management issues of these emerging chemicals of concern are also discussed.

  17. Accident = energy/toxic substance + misinformation

    International Nuclear Information System (INIS)

    Zhou Weihong

    2001-01-01

    Nowadays, the ever-increasing complication of technology and management of industry, supplemented with a variety of information technology and communication skills, has made the modern safety professionals discover a new mechanism of accident occurrences. This mechanism is outstanding in that the integrity of energy and toxic substance utilized in the production processes can be effectively maintained and limited through improving and updating both the techniques and management of information and communications, and consequently, accidents are prevented from occurring, or once accidentally released, the consequences can be effectively mitigated. In light of the experience of China Guangdong Nuclear Power Corporation (CGNPC), the importance of the new mechanism and its prospects for further application in nuclear industry are depicted through case studies

  18. Hazardous substances shipping at inland water harbors

    International Nuclear Information System (INIS)

    Benkovic, Z.

    2009-01-01

    Safety measures and regulations system covering the aspects of fire protection, professional and ecological safety are aimed to create a safe working environment, by detection and remedy of conditions that are potentially hazardous for the well-being of the employees or are leading to certain undesired events. Such unwanted incidents may result in different consequences: operating person's injury, environment pollution or material damage. This study attempts to illustrate the organization of work during hazardous matter loading and unloading at inland water harbors, based on legal provisions and decrees involving safety precautions, and in order to achieve constant enhancement of operating procedure, decreasing thereby the number of work-related injuries and various accidental situations. Fundamental precondition required to prevent possible accidents and to optimize general safety policy is to recognize and control any danger or potential hazard, as well as to be familiar with the legal provisions covering the inland waterway transport of harmful substances.(author)

  19. Transport of nuclear substances in Canada

    Energy Technology Data Exchange (ETDEWEB)

    Faille, S. [Canadian Nuclear Safety Commission, Ottawa, ON (Canada)

    2015-07-01

    CNSC Regulates all Nuclear-related facilities and activities including Uranium mines and mill;, uranium fuel fabrication and processing; nuclear power plants; nuclear substance processing; industrial and medical applications; nuclear research and education; transport; export/import control; security and safeguards and waste management facilities. Our mandate is to protect the health, safety and security of Canadians and the environment, and implement Canada's International commitments on the peaceful use of nuclear energy and disseminate objective scientific, technical and regulatory information to the public. Based on the International Atomic Energy Agency (IAEA) Regulations for the Safe Transport of Radioactive Material, 1996 Edition, Revised and currently being revised to reflect the 2012 edition of the IAEA Regulations.

  20. Transport of nuclear substances in Canada

    International Nuclear Information System (INIS)

    Faille, S.

    2015-01-01

    CNSC Regulates all Nuclear-related facilities and activities including Uranium mines and mill;, uranium fuel fabrication and processing; nuclear power plants; nuclear substance processing; industrial and medical applications; nuclear research and education; transport; export/import control; security and safeguards and waste management facilities. Our mandate is to protect the health, safety and security of Canadians and the environment, and implement Canada's International commitments on the peaceful use of nuclear energy and disseminate objective scientific, technical and regulatory information to the public. Based on the International Atomic Energy Agency (IAEA) Regulations for the Safe Transport of Radioactive Material, 1996 Edition, Revised and currently being revised to reflect the 2012 edition of the IAEA Regulations.

  1. Natural occurring radioactive substances. Vol. 1

    Energy Technology Data Exchange (ETDEWEB)

    Emara, A E [National Center for radiation Research and Technology Atomic Energy Authority, Cairo (Egypt)

    1996-03-01

    Naturally occurring radioactive substances produced by cosmic rays of those of terrestrial origin are surveyed. The different radioactive decay series are discussed. Special emphasis is given to the element radium as regards its properties and distribution in different environmental samples. The properties of naturally occurring k-40 and its distribution in different natural media are also outlined. Induced radionuclides which are formed as a result of the interaction of cosmic rays with the constituents of the atmosphere are mentioned. In this respect the intensity of natural background radiation and the dose at different locations and levels is surveyed. Some regions of exceptionally high radioactivity which result in high exposure rates are mentioned. Monazite deposits and water springs are mentioned in some detail. The Oklo phenomenon as a natural reactor is also discussed. 8 tabs.

  2. Reaction between drug substances and pharmaceutical excipients

    DEFF Research Database (Denmark)

    Larsen, Jesper; Cornett, Claus; Jaroszewski, Jerzy Witold

    2009-01-01

    The reactivity of citric acid towards drug substances in the solid state was examined using the beta-blocker carvedilol as a model compound. The reaction mixtures were analysed by LC-MS, the reaction products were isolated by preparative HPLC, and the structures were elucidated by microprobe NMR...... spectroscopy. Heating a mixture of solid carvedilol and solid citric acid monohydrate for 96h at 50 degrees C resulted in the formation of about 3% of a symmetrical ester as well as of a number of other reaction products in smaller amounts. Formation of the symmetrical ester was also observed at room...... temperature. At 70 degrees C, the amounts of three isomeric esters formed reached 6-8%. The minor reaction products were citric acid amides, O-acetylcarvedilol, and esters of itaconic acid....

  3. Control substances and alcohol use and testing

    Energy Technology Data Exchange (ETDEWEB)

    Przybylski, J.L.

    1994-07-01

    The Omnibus Transportation Employee Testing Act was signed into law in October of 1991. The Omnibus Transportation Employee Testing Act of 1991 required the United States Department of Transportation (DOT) to enact regulations requiring the testing of employees that perform ``safety sensitive functions`` for illegal controlled substance use and alcohol misuse. The Transportation Management Division, Office of Environmental Restoration and Waste Management (TMD/EM-261), United States Department of Energy (DOE), Training Program Manager is committed to promoting the availability of the necessary information to those affected members of the Department of Energy (DOE) community in an effort to attain the highest possible level of regulatory compliance and to enhance the safety of each individual in the workplace.

  4. Natural occurring radioactive substances. Vol. 1

    International Nuclear Information System (INIS)

    Emara, A.E.

    1996-01-01

    Naturally occurring radioactive substances produced by cosmic rays of those of terrestrial origin are surveyed. The different radioactive decay series are discussed. Special emphasis is given to the element radium as regards its properties and distribution in different environmental samples. The properties of naturally occurring k-40 and its distribution in different natural media are also outlined. Induced radionuclides which are formed as a result of the interaction of cosmic rays with the constituents of the atmosphere are mentioned. In this respect the intensity of natural background radiation and the dose at different locations and levels is surveyed. Some regions of exceptionally high radioactivity which result in high exposure rates are mentioned. Monazite deposits and water springs are mentioned in some detail. The Oklo phenomenon as a natural reactor is also discussed. 8 tabs

  5. Toxic or dangerous substances present construction materials

    International Nuclear Information System (INIS)

    Campos Alvarado, A.

    2003-01-01

    The purpose of this investigation is the elaboration of a guide which could be used as a support and consultation concerning the topic of safety in the construction, specifically in the area of the use and managing of material and dangerous substances; considering the possible dangers to medium and long term that some of the common construction materials represent for the health. The gathered information is the result of the review of bibliographical material, the visits to public institutions at national level and to international offices which representation in our country, this way as a work of field and of study of the national market, among others. Besides important consult through the Internet checking many sites of interest with the finality of getting more updated information as possible, like that as the consultation to professionals and workers related to the construction area. (Author) [es

  6. A "refugee paradox" for substance use disorders?

    Science.gov (United States)

    Salas-Wright, Christopher P; Vaughn, Michael G

    2014-09-01

    Few, if any, studies have systematically examined the link between nativity and substance use disorders (SUD) among refugees using national samples. As such, it remains uncertain if the "immigrant paradox" for substance use can be extended to include refugees in the United States. Employing data from the National Epidemiologic Survey on Alcohol and Related Conditions, we examine the lifetime prevalence of SUDs among refugees (n=428) in contrast with non-refugee immigrants (n=4955) and native-born Americans (n=29,267). We also examine the impact of gender and refugee duration on the relationship between nativity, refugee status, and SUDs. Refugees were between 3 and 6 times less likely than native-born Americans meet criteria for all SUDs examined, and significantly less likely than non-refugee immigrants to meet criteria for alcohol (AOR=0.44, 95% CI=0.41-0.47), cocaine (AOR=0.54, 95% CI=0.50-0.59), hallucinogen (AOR=0.66, 95% CI=0.58-0.74), and opioid/heroin (AOR=0.62, 95% CI=0.58-0.66) use disorders. The refugee-SUD link was significantly moderated by gender. Duration as a refugee was associated with increased risk for alcohol use disorder and decreased risk of cannabis and illicit drug use disorders. Study findings provide evidence in support of a "refugee paradox" for SUDs among adults in the United States. Refugees are substantially less likely than native-born Americans to meet criteria for all SUDs examined and, albeit with weaker effects, significantly less likely than non-refugee immigrants to meet criteria for a variety of SUDs. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  7. Environmental risk limits for antifouling substances

    International Nuclear Information System (INIS)

    Wezel, Annemarie P. van; Vlaardingen, P. van

    2004-01-01

    In 1989, the EU restricted the use of tributyl-tin (TBT) and the International Maritime Organisation (IMO) decided for a world-wide ban on TBT in 2003. As a replacement for TBT, new antifouling agents are entering the market. Environmental risk limits (ERLs) are derived for substances that are used as TBT-substitutes, i.e. the compounds Irgarol 1051, dichlofluanid, ziram, chlorothalonil and TCMTB. ERLs represent the potential risk of the substances to the ecosystem and are derived using data on (eco)toxicology and environmental chemistry. Only toxicity studies with endpoints related to population dynamics are taken into account. For Irgarol 1051 especially plants appear to be sensitive; the mode of action is inhibition of photosynthetic electron transport. Despite the higher sensitivity of the plants, the calculated ERL for water based on plants only is higher than the ERL based on all data due to the lower variability in the plant only dataset. Because there is a mechanistic basis to state that plants are the most sensitive species, we propose to base the ERL for water on the plants only dataset. As dichlofluanid is highly unstable in the water phase, it is recommended to base the ERL on the metabolites formed and not on the parent compound. No toxicity data of the studied compounds for organisms living in sediments were found, the ERLs for sediment are derived with help of the equilibrium partitioning method. For dichlofluanid and chlorothalonil the ERL for soil is directly based on terrestrial data, for Irgarol 1051 and ziram the ERL for soil is derived using equilibrium partitioning. Except for Irgarol 1051, no information was encountered in the open literature on the environmental occurrence in The Netherlands of the chemicals studied. The measured concentrations for Irgarol 1051 are close to the derived ERL. For this compound it is concluded that the species composition and thereby ecosystem functioning cannot be considered as protected

  8. Environmental risk limits for antifouling substances

    Energy Technology Data Exchange (ETDEWEB)

    Wezel, Annemarie P. van; Vlaardingen, P. van

    2004-03-10

    In 1989, the EU restricted the use of tributyl-tin (TBT) and the International Maritime Organisation (IMO) decided for a world-wide ban on TBT in 2003. As a replacement for TBT, new antifouling agents are entering the market. Environmental risk limits (ERLs) are derived for substances that are used as TBT-substitutes, i.e. the compounds Irgarol 1051, dichlofluanid, ziram, chlorothalonil and TCMTB. ERLs represent the potential risk of the substances to the ecosystem and are derived using data on (eco)toxicology and environmental chemistry. Only toxicity studies with endpoints related to population dynamics are taken into account. For Irgarol 1051 especially plants appear to be sensitive; the mode of action is inhibition of photosynthetic electron transport. Despite the higher sensitivity of the plants, the calculated ERL for water based on plants only is higher than the ERL based on all data due to the lower variability in the plant only dataset. Because there is a mechanistic basis to state that plants are the most sensitive species, we propose to base the ERL for water on the plants only dataset. As dichlofluanid is highly unstable in the water phase, it is recommended to base the ERL on the metabolites formed and not on the parent compound. No toxicity data of the studied compounds for organisms living in sediments were found, the ERLs for sediment are derived with help of the equilibrium partitioning method. For dichlofluanid and chlorothalonil the ERL for soil is directly based on terrestrial data, for Irgarol 1051 and ziram the ERL for soil is derived using equilibrium partitioning. Except for Irgarol 1051, no information was encountered in the open literature on the environmental occurrence in The Netherlands of the chemicals studied. The measured concentrations for Irgarol 1051 are close to the derived ERL. For this compound it is concluded that the species composition and thereby ecosystem functioning cannot be considered as protected.

  9. Emotion regulation and substance use frequency in women with substance dependence and borderline personality disorder receiving dialectical behavior therapy.

    Science.gov (United States)

    Axelrod, Seth R; Perepletchikova, Francheska; Holtzman, Kevin; Sinha, Rajita

    2011-01-01

    Dialectical behavior therapy (DBT) identifies emotion dysregulation as central to the dangerous impulsivity of borderline personality disorder (BPD) including substance use disorders, and DBT targets improved emotion regulation as a primary mechanism of change. However, improved emotion regulation with DBT and associations between such improvement and behavioral outcomes such as substance use has not been previously reported. Thus, the goal of this study was to assess for improvement in emotion regulation and to examine the relationship between improvements in the emotion regulation and substance use problems following DBT treatment. Emotion regulation as assessed by the Difficulties in Emotion Regulation Scale, depressed mood as assessed by the Beck Depression Inventory, and their associations with substance use frequency were investigated in 27 women with substance dependence and BPD receiving 20 weeks of DBT in an academic community outpatient substance abuse treatment program. Results indicated improved emotion regulation, improved mood, and decreased substance use frequency. Further, emotion regulation improvement, but not improved mood, explained the variance of decreased substance use frequency. This is the first study to demonstrate improved emotion regulation in BPD patients treated with DBT and to show that improved emotion regulation can account for increased behavioral control in BPD patients. SIGNIFICANCE AND FUTURE RESEARCH: Emotion regulation assessment is recommended for future studies to further clarify the etiology and maintenance of disorders associated with emotional dysregulation such as BPD and substance dependence and to further explore emotion regulation as a potential mechanism of change for clinical interventions.

  10. Substance Misuse in the Psychiatric Emergency Service; A Descriptive Study

    Directory of Open Access Journals (Sweden)

    Yves Chaput

    2014-01-01

    Full Text Available Substance misuse is frequently encountered in the psychiatric emergency service (PES and may take many forms, ranging from formal DSM-IV diagnoses to less obvious entities such as hazardous consumption. Detecting such patients using traditional screening instruments has proved problematic. We therefore undertook this study to more fully characterize substance misuse in the PES and to determine whether certain variables might help better screen these patients. We used a prospectively acquired database of over 18,000 visits made to four PESs during a 2-year period in the province of Quebec, Canada. One of the variables acquired was a subjective rating by the nursing staff as to whether substance misuse was a contributing factor to the visit (graded as direct, indirect, or not at all. Substance misuse accounted for 21% of all diagnoses and alcohol was the most frequent substance used. Patients were divided into those with primary (PSM, comorbid (CSM or no substance misuse (NSM. Depressive disorders were the most frequent primary diagnoses in CSM, whereas personality and substance misuse disorders were frequent secondary diagnoses in PSM. Although many variables significantly differentiated the three groups, few were sufficiently detailed to be used as potential screening tools. Those situations that did have sufficient details included those with a previous history of substance misuse, substance misuse within 48 hours of the visit, and visits graded by the nursing staff as being directly and/or indirectly related to substance misuse. Variables related to substance misuse itself were the primary predictors of PSM and, less significantly, CSM. The nursing staff rating, although promising, was obtained in less than 30% of all visits, rendering its practical use difficult to assess.

  11. Neural Circuitry of Impaired Emotion Regulation in Substance Use Disorders.

    Science.gov (United States)

    Wilcox, Claire E; Pommy, Jessica M; Adinoff, Bryon

    2016-04-01

    Impaired emotion regulation contributes to the development and severity of substance use disorders (substance disorders). This review summarizes the literature on alterations in emotion regulation neural circuitry in substance disorders, particularly in relation to disorders of negative affect (without substance disorder), and it presents promising areas of future research. Emotion regulation paradigms during functional magnetic resonance imaging are conceptualized into four dimensions: affect intensity and reactivity, affective modulation, cognitive modulation, and behavioral control. The neural circuitry associated with impaired emotion regulation is compared in individuals with and without substance disorders, with a focus on amygdala, insula, and prefrontal cortex activation and their functional and structural connectivity. Hypoactivation of the rostral anterior cingulate cortex/ventromedial prefrontal cortex (rACC/vmPFC) is the most consistent finding across studies, dimensions, and clinical populations (individuals with and without substance disorders). The same pattern is evident for regions in the cognitive control network (anterior cingulate and dorsal and ventrolateral prefrontal cortices) during cognitive modulation and behavioral control. These congruent findings are possibly related to attenuated functional and/or structural connectivity between the amygdala and insula and between the rACC/vmPFC and cognitive control network. Although increased amygdala and insula activation is associated with impaired emotion regulation in individuals without substance disorders, it is not consistently observed in substance disorders. Emotion regulation disturbances in substance disorders may therefore stem from impairments in prefrontal functioning, rather than excessive reactivity to emotional stimuli. Treatments for emotion regulation in individuals without substance disorders that normalize prefrontal functioning may offer greater efficacy for substance disorders

  12. How Substance Users With ADHD Perceive the Relationship Between Substance Use and Emotional Functioning.

    Science.gov (United States)

    Mitchell, John T; Weisner, Thomas S; Jensen, Peter S; Murray, Desiree W; Molina, Brooke S G; Arnold, Eugene L; Hechtman, Lily; Swanson, James M; Hinshaw, Stephen P; Victor, Elizabeth C; Kollins, Scott H; Wells, Karen C; Belendiuk, Katherine A; Blonde, Andrew; Nguyen, Celeste; Ambriz, Lizeth; Nguyen, Jenny L

    2017-02-01

    Although substance use (SU) is elevated in ADHD and both are associated with disrupted emotional functioning, little is known about how emotions and SU interact in ADHD. We used a mixed qualitative-quantitative approach to explore this relationship. Narrative comments were coded for 67 persistent (50 ADHD, 17 local normative comparison group [LNCG]) and 25 desistent (20 ADHD, 5 LNCG) substance users from the Multimodal Treatment Study of Children with ADHD (MTA) adult follow-up (21.7-26.7 years-old). SU persisters perceived SU positively affects emotional states and positive emotional effects outweigh negative effects. No ADHD group effects emerged. Qualitative analysis identified perceptions that cannabis enhanced positive mood for ADHD and LNCG SU persisters, and improved negative mood and ADHD for ADHD SU persisters. Perceptions about SU broadly and mood do not differentiate ADHD and non-ADHD SU persisters. However, perceptions that cannabis is therapeutic may inform ADHD-related risk for cannabis use.

  13. Substance Misuse and Substance use Disorders: Why do they Matter in Healthcare?

    Science.gov (United States)

    McLellan, A Thomas

    2017-01-01

    This paper first introduces important conceptual and practical distinctions among three key terms: substance "use," "misuse," and "disorders" (including addiction), and goes on to describe and quantify the important health and social problems associated with these terms. National survey data are presented to summarize the prevalence and varied costs associated with misuse of alcohol, illegal drugs, and prescribed medications in the United States. With this as background, the paper then describes historical views, perspectives, and efforts to deal with substance misuse problems in the United States and discusses how basic, clinical, and health service research, combined with recent changes in healthcare legislation and financing, have set the stage for a more effective, comprehensive public health approach.

  14. Comparison of subjective wellbeing in substance users and the parents or partners of substance users.

    Science.gov (United States)

    Tait, Robert J

    2018-04-01

    There is growing interest in the impact of substance use on both the individual consumer's subjective wellbeing (SWB) and the reduced SWB of those closely connected to him or her. The study aimed to compare SWB among substance users ('consumers') and the parents or partners affected by another's substance use, and to evaluate the effect of counselling on changed SWB to 6 months. The study used longitudinal data from a not-for-profit treatment service based in Perth, Australia. Subjective wellbeing was assessed with the Personal Wellbeing Index (PWI) at baseline and 6 months. Data were compared to national norms (mean 75.97) with one sample t tests. Change in PWI scores was assessed with generalised linear mixed models, controlling for age, gender, group (consumers versus parents or partners), psychological distress (Kessler-10) and social connectedness (Lubben). Of 220 participants, 136 (62%) were consumers and 84 (38%) were parents or partners. At 6 months 123 (56%) were re-interviewed. At baseline, both consumers (mean 53.7) and parents or partners (mean 66.1) had significantly lower PWI scores than national norms. At 6 months, only the substance users' PWI scores remained significantly lower (mean 67.8). Subjective wellbeing significantly increased with time (β = 5.52; 95% confidence interval 3.15, 7.90), with no significant time by group interaction. Both groups showed significant decrements in SWB compared with the general population but with improvements over the study period. However, the lack of a control group prevents definitive assertions on causality for improved SWB. © 2017 Australasian Professional Society on Alcohol and other Drugs.

  15. Substance Misuse and Substance use Disorders: Why do they Matter in Healthcare?

    OpenAIRE

    MCLELLAN, A. THOMAS

    2017-01-01

    This paper first introduces important conceptual and practical distinctions among three key terms: substance “use,” “misuse,” and “disorders” (including addiction), and goes on to describe and quantify the important health and social problems associated with these terms. National survey data are presented to summarize the prevalence and varied costs associated with misuse of alcohol, illegal drugs, and prescribed medications in the United States.

  16. The Spread of Substance Use and Delinquency between Adolescent Twins

    Science.gov (United States)

    Laursen, Brett; Hartl, Amy C.; Vitaro, Frank; Brendgen, Mara; Dionne, Ginette; Boivin, Michel

    2017-01-01

    This investigation examines the spread of problem behaviors (substance use and delinquency) between twin siblings. A sample of 628 twins (151 male twin pairs and 163 female twin pairs) drawn from the Quebec Newborn Twin Study completed inventories describing delinquency and substance use at ages 13, 14, and 15. A 3-wave longitudinal actor-partner…

  17. Divorce, Remarriage, and Adolescent Substance Use: A Prospective Longitudinal Study.

    Science.gov (United States)

    Needle, Richard H.; And Others

    1990-01-01

    Examined substance use in adolescents who experienced parental divorce during childhood, during adolescence, or who were from intact families. Adolescence divorce group had greater overall drug involvement. Divorce had negative effect on boys but not on girls. Custodial parents' remarriage led to increased substance use among girls, decreased…

  18. Substance Abuse and the Workplace. Technical Assistance Packet.

    Science.gov (United States)

    Join Together, Boston, MA.

    According to the United States Department of Labor, 73% of drug users in 1997 were employed. Numerous studies, reports, and surveys suggest that substance abuse is having a negative effect on the workplace in terms of decreased productivity; increased accidents; absenteeism; turnover; and medical costs. However, workplace substance abuse is a…

  19. 75 FR 1812 - Importer of Controlled Substances; Notice of Application

    Science.gov (United States)

    2010-01-13

    ... of controlled substances listed in schedule II: Drug Schedule Phenylacetone (8501) II Coca Leaves... registration or re-registration to import crude opium, poppy straw, concentrate of poppy straw or coca leaves... such basic classes of controlled substances listed in schedule I or II, which fall under the authority...

  20. 76 FR 5827 - Importer of Controlled Substances; Notice of Application

    Science.gov (United States)

    2011-02-02

    ... basic classes of controlled substances: Drug Schedule Phenylacetone (8501) II Coca Leaves (9040) II... re-registration to import crude opium, poppy straw, concentrate of poppy straw or coca leaves. As... classes of controlled substances listed in schedule I or II, which fall under the authority of section...