Sample records for MATERIALES PARA ARRANQUE (stemming materials)
from WorldWideScience.org

Sample records 1 - 20 shown. Select sample records:



1

Ultrafast electron-phonon decoupling in graphite

Ishioka, Kunie; Hase, Muneaki; Kitajima, Masahiro; Wirtz, Ludger; Rubio Secades, Ángel; Petek, Hrvoje
2008-03-12

Digital.CSIC (Spain)

4

Sources of resistance to pink stem borer and European corn borer in maize

Malvar Pintos, Rosa Ana; Cartea González, María Elena; Revilla Temiño, Pedro; Ordás Pérez, Amando; Alvarez, A.; Mansilla, J. P.
1993-01-01

Digital.CSIC (Spain)

5

Searching for new sources of pink stem borer resistance in maize

Butrón Gómez, Ana María; Sandoya Miranda, Germán; Santiago Carabelos, Rogelio; Ordás Pérez, Amando; Rial, A.; Malvar Pintos, Rosa Ana
2006-01-01

Digital.CSIC (Spain)

6

QTL mapping for Mediterranean corn borer resistance in European flint germplasm using recombinant inbred lines

Ordás López, Bernardo; Malvar Pintos, Rosa Ana; Santiago Carabelos, Rogelio; Butrón Gómez, Ana María
2010-03-15

Digital.CSIC (Spain)

7

Ordovician Echinoderms of Argentina

Aceñolaza, Guillermo F.; Gutiérrez-Marco, J. C.
2002-01-01

Digital.CSIC (Spain)

8

On Punishment and Well-being

Brandts, Jordi; Rivas, María Fernanda
2007-06-15

Digital.CSIC (Spain)

9

New and revised occurrences of Ordovician crinoids from southwestern Europe

Ausich, William I.; Sá, Artur A.; Gutiérrez-Marco, J. C.
2007-11-01

Digital.CSIC (Spain)

10

Modulation of adult hippocampal neurogenesis by thyroid hormones: implications in depressive-like behavior

Montero-Pedrazuela, Ana; Venero, C.; Lavado Autric, Rosalía; Fernández de Lamo, Iván; García-Verdugo, J. M.; Bernal Carrasco, Juan; Guadaño-Ferraz, Ana
2006-01-31

Digital.CSIC (Spain)

12

Mejora de la sanidad y de la calidad en la propagación viverística del olivo

Castillo, Pablo; Río Rincón, C. del; Azcón González de Aguilar, Concepción; Pérez-Artés, Encarnación; Bejarano, J.; Barea, J. M.; Gómez Barcina, Antonio; Azcón González de Aguilar, Rosario; Caballero Reig, J. M.; Jiménez-Díaz, Rafael M.
2000-01-01

Digital.CSIC (Spain)

13

Inter-Group Conflict and Intra-Group Punishment in an Experimental Contest Game

Abbink, Klaus; Brandts, Jordi; Herrmann, Benedikt; Orzen, Henrik
2008-01-15

Digital.CSIC (Spain)

15

Genetic dissection of a stem cell niche: the case of the Drosophila ovary

Bolívar, Jorge; Pearson, John; López-Onieva, Lourdes; González-Reyes, Acaimo
2006-11-01

Digital.CSIC (Spain)

17

Evaluation of soil biodesinfestation with crop and garden residues in the control of root-knot nematodes populations.

López-Cepero, J.; Piedra Buena, A.; Díez-Rojo, M. A.; Regalado, R.; Brito, E.; Hernández, Z.; Figueredo, M.; Almendros, G.; Bello, A.
2007-01-01

Digital.CSIC (Spain)

20

Efectos diferenciales sobre las actitudes ante la experimentación con alcohol y la percepción de riesgo en adolescentes españoles consumidores de cannabis y alcohol/ Differential effects on attitudes regarding alcohol experimentation and risk perception among Spanish adolescents consumers of cannabis and alcohol

de la Villa Moral Jiménez, María; Ovejero Bernal, Anastasio; Sirvent Ruiz, Carlos; Rodríguez Díaz, Francisco Javier; Pastor Martin, Juan
2009-04-01

Resumen en español Objetivo Nuestro objeto de estudio es el análisis de las actitudes hacia la experimentación con sustancias psicoactivas (alcohol y cannabis) de acuerdo a una triple dimensionalidad: factores cognitivos (creencias, expectativas, percepciones, etc.), afectivos (identificación con los usuarios, agrado o desagrado, etc.) y comportamentales (inclinación para la aceptación del hábito). Así como la percepción de riesgos y la conciencia de daño físico y/o psicosocial de (mas) rivado de la experimentación con alcohol. Además de analizar los motivadores del consumo en una muestra de adolescentes de cuatro Centros de Secundaria del Principado de Asturias, España. Se ofrece un análisis comprehensivo del estatuto diferencial que el alcohol tiene entre dos perfiles de jóvenes consumidores (alcohol y alcohol/cannabis) que es interiorizado por los propios consumidores afectando a una distorsión de sus percepciones de riesgo inherentes a la experimentación. Vinculamos semejantes perfiles actitudinales a procesos de reestructuración sociocognitiva y de carácter motivacional impulsados por las correspondientes mentalidades del usuario. Asimismo, se evidencia la influencia del contexto sociocultural sobre el estatuto diferencial de las sustancias psicoactivas objeto de análisis, en este caso alcohol y derivados cannábicos. Material y métodos Se realizó un muestreo intencional de un colectivo de 273 adolescentes escolarizados de diferentes niveles académicos de edades que oscilan entre los 14 y 18 años que cursan estudios en cuatro Centros de Enseñanza Secundaria del Principado de Asturias, España. Las principales variables investigadas son las relativas a las actitudes ante el consumo de alcohol por parte de adolescentes experimentadores de tal sustancia y de aquellos que usan regularmente junto al alcohol los derivados cannábicos. La esfera actitudinal ha representado la principal área explorada bajo una triple dimensionalidad: factores cognitivos (creencias, expectativas, percepciones, etc.), afectivos (identificación con los usuarios, agrado o desagrado, etc.) y comportamentales (disposición para el consumo e inclinación para la aceptación del hábito). Asimismo, se ha investigado acerca de las motivaciones que impulsan al consumo y las razones explicitadas para beber y no beber, así como sobre aquellas que pueden mediatizar semejantes usos. Junto al plano actitudinal, la percepción del grado de riesgo y problematicidad inherente al consumo de alcohol, así como el conocimiento acerca de las consecuencias negativas derivadas del consumo de alcohol y de las experimentaciones con cannabis y otras sustancias psicoactivas representan las principales variables investigadas. Resultados Se confirma que tanto los adolescentes consumidores de alcohol, por un lado, como los de alcohol y derivados cannábicos, por otro, muestran unas actitudes de gran permisividad ante el consumo, creencias y falsas expectativas, desapego socioafectivo y escasa sensibilidad respecto a quienes se hayan afectados por la problemática, así como una disposición favorable al consumo e incluso a la habituación alcohólica. Del análisis del grado de problematicidad percibida, derivada de la experimentación con diversas sustancias psicoactivas, así como de la percepción de riesgos y consecuencias negativas que se han derivado de sus experiencias de consumo de alcohol, se deriva una tendencia a reconocer las escasas consecuencias negativas sufridas. A partir del análisis diferencial de los factores de percepción de riesgo y de las razones que podrían aducirse para no-beber se ha confirmado que los adolescentes que experimentan con alcohol y derivados cannábicos manifiestan en su conjunto una menor percepción de los riesgos asociados a la experimentación contrastando con la mayor concientización del potencial daño alcohólico de quienes no son usuarios. A partir del análisis de las actitudes globales ante el alcohol se confirma que los consumidores de otras sustancias psicoactivas -en relación con los adolescentes que beben pero no experimentan con otras drogas- son más permisivos, manifiestan unas creencias más distorsionadas y una mayor disposición hacia la habituación alcohólica. Resumen en inglés Introduction This research offers a comprehensive analysis of the distinctive status of Alcohol in two types of young consumers (alcohol and alcohol/ cannabis), which is internalised by the consumers themselves, creating a distortion in their risk perceptions inherent to experimentation. In this sense, the focus of this study is on the change experienced in the attitude sphere in a threefold dimension: cognitive factors (beliefs, expectations, perceptions, etc.), affectiv (mas) e factors (identification with the user, liking or disliking, etc.), and behavioural factors (inclination to accept the habit); as well as risk perception and the conscience of the physical and/or psychosocial damage derived from alcohol experimentation and the motivations that lead to its consumption in a sample of adolescents from four High Schools in the Principality of Asturias (Spain). We link such attitude profiles to the social representation of recreational drugs associated with socio-cognitive restructurating processes promoted by the corresponding user mentalities. In addition, there is evidence of the influence of the sociocultural context on the distinctive status of the psychoactive substances analysed, in this case alcohol and those derived from cannabis. Contrary to the high permissiveness towards alcohol, other psychoactive substances, such as cannabis products, are socially demonised, as they have been considered a gateway for the use of other drugs coming from a tradition far from the western one. However, there appear to be more permissive consciences lately. In relation to young people, attitudes of guilt are being made more flexible, a tendency that can be extended to the distortion of risk perception in alcohol consumption among the users of cannabis products themselves. Strictly, we should consider the distinctive perceptions of the risks associated with experimentation and the attitude patterns that identify them. We must also consider cannabis products and whether or not they are being compared to alcohol as a social drug, or if, on the contrary, the rejection conscience of such practices is being reinforced. Materials and method A distinctive and descriptive analysis of users of alcohol and cannabis products with respect to non-users is presented. This analysis encompasses the attitude sphere, risk perception and the knowledge of the negative consequences derived from the use of alcohol and other experimentation with psychoactive substances in a sample of 273 adolescents, chosen from four High Schools in the Principality of Asturias (Spain) by means of an intentional sampling. They have different academic levels and are within the ages of 14 to 18, the average age being 16.5. 140 of them are girls (51.3% of the sample) and 133 boys (48.7% remaining). The main variables studied are those related to attitudes towards adolescents' use of alcohol alone and those who habitually use it with cannabis products. The main study variables are represented by the attitude sphere, risk perception, the problematic of alcohol consumption, and the knowledge of the negative consequences derived from alcohol consumption and from other experimentations with cannabis and other psychoactive substances. A questionnaire, created ad hoc, has been provided by the researchers, which, under the label of Scale of attitudes and habits of alcohol consumption, includes an analysis of different related elements in the aetiological proposal. The value of Alpha in 273 valid cases and 142 items is .9171. With regard to the research procedure, an anonymous presentation of the Scale to the aforementioned group of students over a two-week time period has been prepared. For the statistical treatment of the data, a statistics package SPSS, version 14.0 has been used. Results According to the results obtained, it is confirmed that adolescent alcohol consumers, on one hand, and those who consume alcohol and cannabis products, on the other, show attitudes of great permissiveness towards consumption, distorted beliefs and expectations, socio-affective alienation and scarce sensitising with respect to those affected by the problematic of it, and a favourable disposition to consumption and even an alcoholic habituation. Firstly, a comparative analysis of response percentages has been done, before indicators through which different aspects of the cognitive, affective and behavioural dimensions of the attitude towards alcohol consumption are evaluated, along with the distortion of risk perception and basic information about the consequences derived from consumption experiences, in either adolescents who are users of alcohol, or those who, apart from alcohol, are habitual users of cannabis products. From the descriptive analysis some conclusions can be drawn such as: • Obvious permissive disposition towards the process of alcoholic habituation in adolescent users of alcohol, mainly extensible to users of both alcohol and cannabis products. • From the evaluation of the cognitive dimension of the attitudes, explicit disposition is confirmed, in the sense of displaying a distortion of these attitudes. This can be attributed to, as it has been pointed out in the theoretical exposition, the possible action of the user mentality. • In the evaluation of attitude aspects, a dominant tendency to display a scarce identification and sensitising disposition with respect to those who give up drinking or are abstemious and even to openly show rejection to congratulating somebody that has given up drinking. • Lastly, the finding of coincidences between adolescent alcohol users and those who also use cannabis products in the determination of the main motivations that drive their alcohol consumption. The tendency of a more permissive attitude towards alcohol consumption in adolescents is confirmed along with a distorted perception of the risks derived from questions related to organic damage associated with experimentation. In the evaluation of the alcoholism problematic in our society, we also have found the confirmation of a mentality associated with experimentation that leads to a distortion of the damages derived from experimentation. Therefore, with respect to the distinctive analysis of the main motivations that drive alcohol consumption, a tendency of evasion of routine is confirmed. Peer pressure by consumer friends, disposition to lose one's inhibitions, meeting people, and experiencing euphoria are the main reasons that drive experimentation in adolescents who consume alcohol and, also, in those users of both alcohol and cannabis products. A tendency to recognise the scarce negative consequences suffered is derived from the analysis of the degree of perceived problems stemming from experimentation with different psychoactive substances, as well as the risk perception and negative consequences derived from their experiences of alcohol consumption and from the main explicit reasons for not drinking. According to an analysis procedure similar to the aforementioned, the importance of the differences found between consumers and non-consumers either of alcohol or both alcohol and cannabis products could be determined, confirming recognition of worse consequences perceived on physical and psychosocial health derived from experimentation, even though it cannot benefit a real consciousness, as has been confirmed through the previous attitude analysis.

Scientific Electronic Library Online (Spanish)

22

Detection of the nondefoliating pathotype of Verticillium dahliae in infected olive plants by nested PCR

Mercado Blanco, Jesús; Rodríguez-Jurado, Dolores; Pérez-Artés, Encarnación; Jiménez-Díaz, Rafael M.
2001-10-01

Digital.CSIC (Spain)

23

Detection of the defoliating pathotype of Verticillium dahliae in infected olive plants by nested PCR

Mercado Blanco, Jesús; Rodríguez-Jurado, Dolores; Pérez-Artés, Encarnación; Jiménez-Díaz, Rafael M.
2002-01-01

Digital.CSIC (Spain)

24

Condiciones higiénico-sanitarias de comedores escolares del municipio de Oviedo/ Health and hygiene-related conditions of school lunchrooms in the municipality of Oviedo

Arias Díaz, Cristina; Blanco Fernández, Natalia; Rodríguez Fidalgo, Alfonso; Tardón García, Adonina; Cueto Espinar, Antonio
1998-11-01

Resumen en español FUNDAMENTO: Conocer las condiciones higiénico-sanitarias en las que se encuentran los comedores escolares del municipio de Oviedo, mediante la realización de una inspección higiénico-sanitaria en estas instalaciones. MÉTODO: Se ha realizado un estudio epidemiológico descriptivo transversal en 24 colegios del municipio de Oviedo, 9 concertados y 15 públicos, según información procedente del Ministerio de Educación y Ciencia (MEC). Se ha llevado a cabo una inspecc (mas) ión con un protocolo basado en la Reglamentación Técnico-Sanitaria de Comedores Colectivos. Las variables son las condiciones higiénico-sanitarias de los locales (cocinas, comedores y servicios higiénicos), del utillaje, condiciones del personal y de las materias primas y alimentos. Se han considerado condiciones inadecuadas o deficiencias cuando no se cumplen los criterios del protocolo. RESULTADOS: Las deficiencias encontradas en la mayoría de los comedores escolares inspeccionados han sido la falta de protección en los elementos de iluminación, de malla antiinsectos en ventanas y lavamanos de accionamiento no manual, toallas de papel de un solo uso y jabón líquido tanto en cocinas como en servicios higiénicos. Se han comparado estadísticamente las variables del estudio entre colegios públicos y concertados, para ello se ha realizado un Test de T de Student obteniéndose diferencias significativas, entre ambos tipos de colegios, solo en el estado de las cocinas y en el total de los ítems. CONCLUSIONES: La mayoría de las anomalías encontradas, tanto en colegios públicos como en concertados, son de carácter estructural y de las instalaciones, originadas por el desconocimiento de la legislación vigente. Se cree conveniente impartir formación en Educación Sanitaria, dada la actitud positiva mostrada por los responsables de los centros educativos. Resumen en inglés BAKCGROUND: To ascertain the health and hygiene-related conditions of school lunchrooms within the municipality of Oviedo by means of conducting a health and hygiene inspection of these facilities. METHOD: A descriptive epidemiological cross-sectional study was made of 24 schools in the municipality of Oviedo, 9 of which were government-subsidized private schools and another 15 of which were public schools, according to information from the Ministry of Education and Scien (mas) ce. An inspection was conducted entailing a protocol based on the Public Lunchroom Health and Hygiene Regulations. The variables are the health and hygiene-related conditions of the premises (kitchens, lunchrooms and lavatories), of the utensils, the health of the employees and the conditions of the raw materials and foods. These conditions have been considered to be inadequate or deficient whenever they failed to met the criteria of the protocol in question. RESULTS: The deficiencies found n most of the school lunchrooms inspected were the lack of protection of the lighting components, of window screens to prevent the entry of insects and of soap dispensers which are not hand-operated, disposable paper towels and liquid soap both in kitchens as well as in lavatories. The variables entailed in this study have been compared among public schools and government-subsidized private schools, for which purpose a Student T Test was employed, significant differences having been found to exist between these two types of schools solely in the condition of the kitchens and in the total of the items. CONCLUSIONS: Most of the irregularities found in both the public schools and in the government-subsidized private schools are of an organizational nature and with regard to the facilities stemming from a lack of knowledge of the laws in force. It is deemed advantageous for training in Hygiene to be provided, given the positive attitude shown by those in charge of the schools in question.

Scientific Electronic Library Online (Spanish)

25

Condiciones higiénico-sanitarias de comedores escolares del municipio de Oviedo/ Health and hygiene-related conditions of school lunchrooms in the municipality of Oviedo

Arias Díaz, Cristina; Blanco Fernández, Natalia; Rodríguez Fidalgo, Alfonso; Tardón García, Adonina; Cueto Espinar, Antonio
1998-11-01

Resumen en español FUNDAMENTO: Conocer las condiciones higiénico-sanitarias en las que se encuentran los comedores escolares del municipio de Oviedo, mediante la realización de una inspección higiénico-sanitaria en estas instalaciones. MÉTODO: Se ha realizado un estudio epidemiológico descriptivo transversal en 24 colegios del municipio de Oviedo, 9 concertados y 15 públicos, según información procedente del Ministerio de Educación y Ciencia (MEC). Se ha llevado a cabo una inspecc (mas) ión con un protocolo basado en la Reglamentación Técnico-Sanitaria de Comedores Colectivos. Las variables son las condiciones higiénico-sanitarias de los locales (cocinas, comedores y servicios higiénicos), del utillaje, condiciones del personal y de las materias primas y alimentos. Se han considerado condiciones inadecuadas o deficiencias cuando no se cumplen los criterios del protocolo. RESULTADOS: Las deficiencias encontradas en la mayoría de los comedores escolares inspeccionados han sido la falta de protección en los elementos de iluminación, de malla antiinsectos en ventanas y lavamanos de accionamiento no manual, toallas de papel de un solo uso y jabón líquido tanto en cocinas como en servicios higiénicos. Se han comparado estadísticamente las variables del estudio entre colegios públicos y concertados, para ello se ha realizado un Test de T de Student obteniéndose diferencias significativas, entre ambos tipos de colegios, solo en el estado de las cocinas y en el total de los ítems. CONCLUSIONES: La mayoría de las anomalías encontradas, tanto en colegios públicos como en concertados, son de carácter estructural y de las instalaciones, originadas por el desconocimiento de la legislación vigente. Se cree conveniente impartir formación en Educación Sanitaria, dada la actitud positiva mostrada por los responsables de los centros educativos. Resumen en inglés BAKCGROUND: To ascertain the health and hygiene-related conditions of school lunchrooms within the municipality of Oviedo by means of conducting a health and hygiene inspection of these facilities. METHOD: A descriptive epidemiological cross-sectional study was made of 24 schools in the municipality of Oviedo, 9 of which were government-subsidized private schools and another 15 of which were public schools, according to information from the Ministry of Education and Scien (mas) ce. An inspection was conducted entailing a protocol based on the Public Lunchroom Health and Hygiene Regulations. The variables are the health and hygiene-related conditions of the premises (kitchens, lunchrooms and lavatories), of the utensils, the health of the employees and the conditions of the raw materials and foods. These conditions have been considered to be inadequate or deficient whenever they failed to met the criteria of the protocol in question. RESULTS: The deficiencies found n most of the school lunchrooms inspected were the lack of protection of the lighting components, of window screens to prevent the entry of insects and of soap dispensers which are not hand-operated, disposable paper towels and liquid soap both in kitchens as well as in lavatories. The variables entailed in this study have been compared among public schools and government-subsidized private schools, for which purpose a Student T Test was employed, significant differences having been found to exist between these two types of schools solely in the condition of the kitchens and in the total of the items. CONCLUSIONS: Most of the irregularities found in both the public schools and in the government-subsidized private schools are of an organizational nature and with regard to the facilities stemming from a lack of knowledge of the laws in force. It is deemed advantageous for training in Hygiene to be provided, given the positive attitude shown by those in charge of the schools in question.

Scientific Electronic Library Online (Spanish)

26

Composición de la alfalfa (Medicago sativa L.) a lo largo del ciclo de explotación

Montañés García, Luis; Abadía, Armando; Heras Cobo, Luis
1972-01-01

Digital.CSIC (Spain)

27

Comportamiento de un puente histórico de arco de albañilería ante cargas dinámicas/ The behaviour of a historic masonry arch bridge regarding dynamic loads

Ospina, Yesid Mauricio; Paredes López, Jairo Andrés; Galindo Díaz, Jorge
2009-12-01

Resumen en español En el presente artículo se describe el proceso de análisis al que fue sometido un puente histórico de arco de ladrillo construido en Colombia durante el siglo XVIII con el fin de predecir su comportamiento ante cargas producidas por sismos y determinar su vulnerabilidad. Dos estudios previos al análisis sísmico fueron realizados para obtener así información básica acerca del comportamiento global de la estructura: un análisis estático lineal y un análisis modal (mas) , ambos a partir de un modelo tridimensional que se elaboró haciendo uso del método de elementos finitos. Se simuló la excitación sísmica bajo las condiciones propuestas en la norma sismorresistente del año 1998 (NSR-98). Los resultados obtenidos fueron coherentes con la historia del puente y sus respuestas frente a terremotos; la comparación entre las cargas sísmicas y la capacidad resistente de los materiales que constituyen la estructura confirma la vulnerabilidad de este tipo de edificios frente a daños localizados y posibilidades de colapso. Finalmente, los resultados sugieren la aplicabilidad del procedimiento desarrollado a otras estructuras históricas en Colombia. Resumen en inglés This article describes the analysis of a historic brick arch bridge constructed in Colombia during the 18th century for predicting its behavior in response to loads produced by seismic activity and determining its vulnerability. Two studies were carried out prior to the seismic analysis to obtain basic information regarding the structure's overall behavior (modal analysis and linear static analysis), both stemming from a threedimensional model constructed by the finite el (mas) ements method. Seismic excitation was simulated in the conditions proposed by 1998 Colombian seismic-resistant norms (NSR-98). The results obtained agreed with the bridge's history and with its response to earthquakes; the comparison between seismic loads and the resistance capacity of the materials constituting the structure confirms the vulnerability of these types of constructions regarding localised damage and the possibility of collapse. The results suggest that this procedure can be applied to other historic structures in Colombia.

Scientific Electronic Library Online (Spanish)

28

Caracterización de la curva de termoluminiscencia del circón a partir de su contenido radiactivo y del análisis térmico diferencial

Correcher, Virgilio; Valle Fuentes, Francisco José; García Guinea, Javier; Robredo, L. M.; López-Arce, Paula
2003-11-01

Digital.CSIC (Spain)