WorldWideScience

Sample records for heterogeneidad vegetal sobre

  1. Efecto de la heterogeneidad sobre las isotermas de adsorción de carbones activados

    Karim Sapag

    2010-06-01

    Full Text Available Los carbones activados (CA son materiales microporosos que poseen gran capacidad de adsorción. La heterogeneidad de cualquier adsorbente, en particular la de los CA, puede ser separada en dos grandes familias: energética (o superficial y estructural. La heterogeneidad estructural es causada por la presencia de poros de diferentes tamaños y formas, y por su posible interconexión; mientras que la heterogeneidad energética se origina por las irregularidades superficiales, así como por la presencia de grupos funcionales y/o impurezas. En este trabajo se discutirán diferentes modelos de heterogeneidad superficial en materiales con poros de geometría, tipo placas paralelas, y su efecto sobre las isotermas de adsorción y en las distribuciones de tamaño de poros. Activated carbons (AC are microporous materials that have high adsorptive capacity. The heterogeneity of any adsorbent, in particular of the AC, can be separated into two large families: energetic and structural. Structural heterogeneity is caused by the presence of pores of different sizes, shapes and how they are interconnected, while the energy heterogeneity is caused by surface irregularities, as well as by the presence of functional groups and / or impurities. In this paper we discuss different models of surface heterogeneity in materials with slit pores and its effect on adsorption isotherms and the pore size distributions (PSD.

  2. A interincompreensão gera polêmica: alteridade e heterogeneidade nos discursos das cantoras Anitta e Pitty sobre comportamento sexual feminino

    Juliane de Araújo Gonzaga

    2017-01-01

    Full Text Available Este artigo se propõe a analisar a situação de polêmica entre as cantoras Anitta e Pitty, durante um programa televiso, em torno do comportamento das mulheres no domínio da sexualidade. Os objetivos específicos são: (i verificar como a alteridade e a heterogeneidade delimitam posições discursivas; (ii descrever a situação de polêmica e a mobilização de simulacros no processo de interincompreensão regrada e (iii analisar a situação de polêmica e demonstrar que a alteridade e a heterogeneidade materializam embates legitimados historicamente no campo da sexualidade. Situado na Análise do Discurso francesa, este trabalho utiliza referencial teórico-metodológico baseado nos pressupostos de Authier-Revuz (1990, 1998, acerca da alteridade e da heterogeneidade enunciativa, e nas considerações de Maingueneau (1993, 2005 sobre o primado do interdiscurso e a polêmica como interincompreensão regrada. O método de análise baseia-se na descrição e interpretação de marcas linguísticas (glosas, pronomes, dêiticos, vocabulário que materializam jogos de alteridade, movimentos de já-ditos e regras sobre o dizível e o indizível no discurso. Por fim, a análise conclui que os enunciados são heterogeneamente marcados e que as posições discursivas produzem situação de polêmica, pois são atravessadas por simulacros, estereótipos e embates históricos entre os gêneros no domínio da sexualidade.

  3. Heterogeneidad y desigualdades de género en el sector Salud: entre las estadísticas y las percepciones sobre las condiciones de trabajo

    Eliana Laura Aspiazu

    2016-04-01

    Full Text Available La Salud es una actividad que se caracteriza por su heterogeneidad, por tener una gran carga de cuidado en sus tareas y estar compuesta mayormente por mujeres, a la vez que es atravesada por múltiples déficits en las condiciones laborales y profundas desigualdades de género. Este artículo indaga sobre las condiciones laborales en el sector de la salud desde una perspectiva de género, a partir de datos estadísticos disponibles y de entrevistas en profundidad a trabajadores/as y dirigentes sindicales de la Salud. El análisis triangula datos cuantitativos y cualitativos acerca de las desigualdades en la inserción laboral entre varones y mujeres y las percepciones y discursos predominantes en el ámbito sindical al respecto, con el objetivo de identificar avances y limitaciones en la incorporación de un enfoque de género en el sector.

  4. Heterogeneidad empresarial, dinámica de la productividad y flujos de empleo : cuatro estudios sobre la empresa española

    Ruano Pardo, Sonia

    2003-01-01

    Esta tesis reúne cuatro estudios realizados a partir de la información que proporciona la Encuesta sobre Estrategias Empresariales (ESEE) relativa a una muestra representativa de empresas manufactureras españolas encuestadas a lo largo del período 1990-98. El primer ensayo cuantifica la contribución de la rotación empresarial y de la evolución de la productividad de las empresas instaladas al crecimiento de la productividad agregada. Este estudio propone una metodología no paramétrica, altern...

  5. Efectos de la heterogeneidad del paisaje agrícola pampeano sobre el carbono, la biota edáfica y la descomposición de la hojarasca

    D`Acunto, Luciana

    2015-01-01

    La intensificación de la agricultura es la causa principal de la transformación del paisaje, de la disminución de su heterogeneidad y de la alteración de servicios ecosistémicos como la biodiversidad y el secuestro de carbono. La Región Pampeana no ha escapado a este fenómeno global. Esta tesis buscó comprender cómo la heterogeneidad espacial y temporal de un agroecosistema, dada por la presencia de márgenes no cultivados y por diferentes secuencias de cultivos, respectivamente, afectan el co...

  6. Antioxidantes de origen vegetal. Efecto sobre el envejecimiento

    Descalzo Perea, Virginia

    2016-01-01

    Este trabajo consiste en una revisión bibliográfica sobre diferentes tipos de antioxidantes de origen vegetal que podemos encontrar en los alimentos, así como sus características y efectos principales. Los radicales libres más frecuentes son los derivados del oxígeno y se producen como consecuencia de las reacciones de oxidación, que constituyen una parte esencial del metabolismo. Cuando la producción de radicales libres excede a la defensa antioxidante se da un desequilibrio y, como consecue...

  7. Influencia de la heterogeneidad edáfica y de la topografía en la composición de especies vegetales sobre escombreras mineras de carbón del norte de España

    López Marcos, Daphne

    2012-01-01

    La restauración de escombreras mineras es un reto para los profesionales de este campo y comprender sus limitaciones ecológicas es un requisito para garantizar una restauración exitosa, por ello se plantea evaluar la influencia de la heterogeneidad edáfica y topográfica en la composición de especies vegetales en una ladera de una mina de carbón restaurada, donde se distinguieron dos comunidades vegetales (pastizal-matorral) y se compararon con una comunidad forestal vecina. Se encontraron dif...

  8. El efecto de la heterogeneidad de las propiedades mecánicas de una unión soldada sobre la carga de plastificación de probetas de fractura tipo C(T Y SE(B

    Donoso, J. R.

    2008-10-01

    Full Text Available The yield load values of two-dimensional C(T and SE(B specimens with various degrees of mismatch, were numerically evaluated. The yield load values were normalized using the Common Format in order to analyze the effect of the weld, using as reference material C(T and SE(B specimens made only of base metal (BM. In undermatched specimens (the weld metal elastic limit is lower than that of BM the normalized yield load decreases compared to the elastic limit of BM. In overmatched specimens (the weld metal elastic limit is larger than that of BM, the yield load increases. This variation of the yield load depends on the degree of mismatch, and on the relation between weld size and crack length. The numerical results were compared with experimental values obtained with mismatched weld C(T specimens using an ASTM A 588 steel as base metal.

    Se determinaron, numéricamente, los valores de la carga de plastificación de probetas de geometría compacta C(T y de flexión SE(B, bidimensionales, con cordón de soldadura de diferentes grados de desajuste entre los límites elásticos del material de soldadura y del metal base. Los valores de la carga de plastificación de las probetas bimetálicas se normalizaron mediante el Formato Común, con el objeto de analizar el efecto del cordón, tomando como referencia probetas de metal base (MB. En probetas sub-ajustadas (límite elástico del cordón menor que el de MB la carga de plastificación normalizada disminuye, comparada con el límite elástico de MB. En probetas sobre-ajustadas (límite elástico del cordón mayor que el de MB se produce un aumento de la carga de plastificación normalizada. Esta variación depende del grado de desajuste, y de la relación entre tamaño de cordón y longitud de grieta. Los resultados numéricos se compararon con valores experimentales obtenidos con probetas C(T de uniones soldadas desajustadas del acero ASTM A 588.

  9. Efecto de la temperatura, el estrés hídrico y luminoso sobre la heterogeneidad del fotosistema II en cuatro variedades de poroto (Phaseolus vulgaris L. Effect of temperature, water and light stress on PSII heterogeneity in four bean varieties (Phaseolus vulgaris L.

    JAVIERA GONZÁLEZ

    2001-12-01

    Full Text Available Las plantas superiores, requieren de mecanismos que permitan proteger a los centros fotosintéticos de daño oxidativo, particularmente en condiciones ambientales que determinen una absorción luminosa en exceso de su capacidad de utilización fotoquímica, como son las altas intensidades de luz, propiamente tal, restricción de agua y aumentos de temperatura. En el mediano y largo plazo los centros PSII tendrían la capacidad de modificar su localización y estructura, formando los centros PSII del tipo ß y los estados de transición, cuya variación no depende, exclusivamente, de la intensidad luminosa. En el presente estudio se determinó el efecto de distintos estreses ambientales sobre la heterogeneidad del PSII, en cuatro cultivares de poroto: Arroz Tuscola (AT, Orfeo INIA (OI, Bayos Titán (BT y Hallado Dorado (HD. En plantas desarrolladas en cámaras de crecimiento, la proporción de centros PSIIß aumentó hasta en un 100 % en la medida que se incrementó la temperatura. Dicho efecto fue magnificado por el estrés hídrico, en estas plantas. En condiciones de campo, el estrés lumínico impuesto por la fijación de folíolos a la posición horizontal, aumentó aun más el efecto del estrés hídrico sobre la proporción de tales centros, desde un 27 %, en plantas regadas y hoja en posición normal, hasta un 63 % en plantas estresadas y hojas forzadas a la horizontalidad. En cuanto a los estados de transición, se observó, en plantas desarrolladas a 20 ºC en cámaras de crecimiento, un aumento de estos al someter sus hojas a 15 ºC. Así mismo, temperaturas de 25 a 35 ºC indujeron aumentos en los estados de transición. El estrés hídrico, en los cultivares AT y OI, aminoró la magnitud del efecto de la temperatura, al contrario de lo observado en BT. En el cultivar HD, no se distingue un efecto claro del estrés hídrico, sobre la formación de los estados de transición inducidos por cambios en la temperatura. Aún cuando existen

  10. VARIABILIDAD DEL PARÁMETRO DE RUGOSIDAD SOBRE UNA COBERTURA VEGETAL

    María Isabel Gassmann

    2015-12-01

    Full Text Available La longitud de rugosidad es un parámetro de escala característico de la capa de superficie, utilizado en estudios micrometeorológicos, de contaminación urbana, de potencial eólico o en los modelos dinámicos de pronóstico del tiempo y el clima. Experimentalmente este parámetro se determina a partir de datos observacionales del perfil de viento bajo condiciones neutrales de estabilidad atmosférica. Sin embargo, existen evidencias de una dependencia del mismo con los cambios en la estabilidad. Utilizando datos observados sobre una superficie con cobertura vegetal y bajo las hipótesis de la teoría de la semejanza de Monin-Obukhov, se estudió la variabilidad del parámetro de rugosidad con la estabilidad atmosférica. Se obtuvieron expresiones empíricas que permitieron estimar esa longitud en función de un parámetro de estabilidad. Se encontraron variaciones en su magnitud de hasta dos órdenes bajo condiciones estables, mientras que en condiciones inestables su variabilidad fue pequeña. Por otra parte, se estudió el impacto que producen las parametrizaciones obtenidas al aplicarlas en un preprocesador meteorológico para un modelo de difusión de contaminantes. Los resultados obtenidos tendrían un impacto directo en el campo de velocidades cercano a superficie

  11. Institutos profesionales en Chile. Tendencias actuales y heterogeneidad institucional

    Pablo Sandoval Vilches

    2017-01-01

    Full Text Available El artículo desarrolla un diagnóstico de la situación actual de los Institutos Profesionales (IP-s existentes en el país, con énfasis en la heterogeneidad que presentan entre sí. Para ello se realiza un análisis de los indicadores del sistema ÍNDICES del CNED, utilizando técnicas estadísticas de clasiicación multivariante. Los resultados muestran la existencia de importantes diferencias entre los IP-s actualmente vigentes, como son el número de áreas de conocimientos ofertadas, procedencia de la matrícula, infraestructura y la tasa resultado del ejercicio / patrimonio. A partir de éstas, fueron identiicados 4 conglomerados de IP-s en los cuales tiende a coincidir el ámbito de formación que ofrecen con las características institucionales internas. Se concluye que el reconocimiento de esta diversidad puede contribuir a la mejora de los mecanismos de evaluación dispuestos para la acreditación institucional de este tipo de instituciones.

  12. Vegetation

    Epstein, H.E.; Walker, D.A.; Bhatt, U.S.

    2012-01-01

    increased 20-26%. • Increasing shrub growth and range extension throughout the Low Arctic are related to winter and early growing season temperature increases. Growth of other tundra plant types, including graminoids and forbs, is increasing, while growth of mosses and lichens is decreasing. • Increases...... in vegetation (including shrub tundra expansion) and thunderstorm activity, each a result of Arctic warming, have created conditions that favor a more active Arctic fire regime....

  13. Antibacterial activity of vegetal extracts against serovars of Salmonella Atividade antibacteriana de extratos vegetais sobre sorovares de Salmonella

    Daiane Voss-Rech

    2011-02-01

    Full Text Available in vitro antibacterial activity of 21 hydroethanolic vegetal extracts was assessed against 20 serovars of Salmonella. Regarding the tested extracts, 85.7% of them presented antibacterial activity. The six active extracts which showed activity on the largest number of serovars and the extract of Eucalyptus sp. were submitted to the determination of Minimum Inhibitory Concentration (MIC and Minimum Bactericidal Concentration (MBC. Of these, six extracts showed bacteriostatic and bactericidal activity with MIC and MBC for Punica granatum (pomegranate from 20 and 60mg mL-1, for Eugenia jambolana (rose apple from 40 and 240mg mL-1, Eugenia uniflora (surinam cherry from 80 and 240mg mL-1, Caryophyllus aromaticus (clove from 10 and 60mg mL-1, Psidium araca from 30 and 320mg mL-1 and Eucalyptus sp. from 40 and 160mg mL-1. Achyrocline satureioides (macela presented only bacteriostatic potential and MIC from 160mg mL-1. Caryophyllus aromaticus, Eucalyptus sp., and Psidium araca presented the best results for bactericidal activity, inhibiting, respectively, 84.2%, 42.1%, and 17.6% of Salmonella's serovars. The activity of each extract varied for different serovars; S. London presented resistance to the six extracts in MBC, while S. Pullorum was the most susceptible serovar.A atividade antibacteriana de 21 extratos hidroetanólicos vegetais foi avaliada in vitro frente a 20 sorovares de Salmonella. Dos extratos testados, 85,7% apresentaram atividade antibacteriana. Os seis extratos que evidenciaram atividade sobre o maior número de sorovares e Eucalyptus sp. foram submetidos à determinação da Concentração Inibitória Mínima (CIM e Concentração Bactericida Mínima (CBM. Destes, seis extratos apresentaram atividade bacteriostática e bactericida com MIC para Punica granatum (romã a partir de 20 e 60mg mL-1, Eugenia jambolana (jambolão de 40 e 240mg mL-1, Eugenia uniflora (pitanga de 80 e 240mg mL-1, Caryophyllus aromaticus (cravo de 10 e 60mg mL-1

  14. Influencia de los defecaderos de camélidos sobre el desarrollo vegetal y riqueza de especies en morrenas glaciales, Tierra del Fuego Camelid defecation influences vegetation development and species richnesss on glacial moraines, Tierra del Fuego

    JUAN M. HENRÍQUEZ

    2004-09-01

    Full Text Available Los escasos trabajos de interacción planta-herbívoro en ambientes severos han concluido que los herbívoros tienen un rol menor sobre el proceso de colonización en los estados tempranos de la sucesión. Aquí se documentan los efectos de defecaderos de un herbívoro ungulado (Lamma guanicoe sobre los patrones vegetales en una intermorrena glacial reciente. Se evaluó la composición florística, frecuencia y síndrome de dispersión de las especies presentes sobre los defecaderos y sitios control. Parámetros de suelo fueron analizados en ambos substratos. La riqueza y diversidad de especies vasculares fueron significativamente mayores sobre los defecaderos. El síndrome de dispersión dominante es la anemocoría en la vegetación de ambos tipos de substratos. Los defecaderos presentan valores superiores de materia orgánica, nitrógeno y fósforo, indicando condiciones localmente más favorables para el establecimiento de plántulas en este ambiente pobre en nutrientes y materia orgánica. Finalmente, se discute acerca de los posibles mecanismos que originan la mayor riqueza y diversidad de especies sobre los defecaderos de guanaco, concluyendo que constituyen una fuente potencial de propágulos que puede acelerar el proceso de colonización en morrenas glaciaresThe few studies of herbivore-plant interaction in severe environments have concluded that the herbivores have a minor role on the process of colonization in the early states of the succession. This paper describes the effects of camelid (Lamma guanicoe dung heaps on vegetation patterns on a recent glacial moraine. Floristic composition, diversity, abundance and dispersion syndrome spectra of the vegetation growing on dung heaps was compared with that of control sites unaffected by camelid defecation. Soil parameters of both substrates were analyzed. Vascular species riches and diversity were significantly higher on dung heaps. Anemochory was the dominant dispersion syndrome on both

  15. Social heterogeneity and children's nutrition in the rural environment La heterogeneidad social y la nutrición infantil en el medio rural A heterogeneidade social e a nutrição infantil no meio rural

    Livia Rocha

    2007-10-01

    Full Text Available OBJECTIVES: this study is inserted in an Interdisciplinary Program of Research and aims to learn about the nutritional situation and life context of children under five in the rural environment of Arambaré/RS, Brazil, through an epidemiological cross-sectional descriptive study. METHOD: the data of anthropometrical assessment (Weight/Age, Age/Height, Weight/Height expressed in Z scores, whose reference population is that of the National Center for Health Statistics (NCHS were analyzed in the Epinut software, and the semi-structured form applied to the child's responsible was analyzed through descriptive statistics in the Epi-Info 6.04. RESULTS: It is evidenced that the nutritional problems vary within the social heterogeneity present in the municipality. There are different levels of vulnerability to illness. CONCLUSION: this study demonstrates the importance of understanding the social dynamics modelling individual behavior that reflects on health.OBJETIVOS: El estudio se inserta en un Programa Interdisciplinar de Investigación y objetiva conocer la situación nutricional y el contexto de vida del universo de niños menores de cinco años del medio rural de Arambaré/RS, Brasil, a través de un estudio epidemiológico del tipo seccional descriptivo. MÉTODOS: Los datos de la evaluación antropométrica (peso/edad, edad/estatura, peso/estatura fueron analizados en el Epinut, y los del formulario semi-estructurado aplicado al responsable del niño fueron analizados vía estatística descriptiva en el Epi-info 6.04. RESULTADOS: Se constata que los problemas nutricionales varían dentro de la heterogeneidad social presente en el municipio, lo que representa diferentes grados de vulnerabilidad al adolecimiento. CONCLUSIONES: Se demostró la importancia de comprender las dinámicas sociales que modulan los comportamientos de los individuos y repercuten sobre su salud.OBJETIVOS: o estudo insere-se num Programa Interdisciplinar de Pesquisa e objetiva

  16. El desarrollo turístico en Cancún, Quintana Roo y sus consecuencias sobre la cubierta vegetal

    Graciela Pérez Villegas

    2000-08-01

    Full Text Available This paper deals with the expansion of tourism complex in Cancún, Mexico, from its creation as a beach resort in the l970´s to the present. The quantitative measurement of the urban growth over natural scenarios is the major contribution of this study, particularly with reference to the disturbance of natural vegetation due to the construction of physical infrastructure for both housing and tourist activities. Moreover, it emphasizes the risk of affecting natural ecosystems surrounding Cancún as a consequence of an excessive tourism development.

  17. Efectos de la instalación de un gasoducto sobre algunas propiedades del suelo superficial y la cobertura vegetal en el NE de Chubut Gas-pipeline installation effects on superficial soil properties and vegetation cover in Northeastern Chubut

    Esteban Kowaljow

    2008-07-01

    Full Text Available En este trabajo describimos el impacto del tendido de un gasoducto y de la reposición parcial del material removido, sobre algunas propiedades físicas y químicas del suelo y sobre la cobertura vegetal en tres sitios ecológicos del nordeste de Chubut. En cada sitio se identificaron 4 zonas diferentes: zona 1, faja desmontada y compactada por el tránsito de maquinaria pesada; zona 2, faja desmontada, con posterior reposición del suelo y la vegetación removidos; y otras dos zonas correspondientes a la estepa adyacente no disturbada: montículos asociados a arbustos y espacios entre montículos. Los mayores valores de densidad aparente se encontraron en los suelos de la zona 1 y en los del entremontículo (1,43 Mg m-3. La resistencia a la penetración fue significativamente mayor en las zonas 1 y 2, ambas zonas presentaron valores de resistencia a la penetración superiores a 1 MPa. La tasa de infiltración fue mucho mayor en el montículo (261 mm h-1 que en el resto de las zonas. La velocidad de infiltración de la zona 2 (85 mm h-1 fue mayor a la de la zona 1 (35 mm h-1 y el entremontículo (50 mm h-1. Los contenidos de carbono orgánico y nitrógeno de los suelos de las zonas 1 y 2 fueron similares a los del entremontículo y significativamente inferiores a los del montículo, excepto en la zona 2 de uno de los sitios ecológicos. La remoción de la vegetación y el suelo superficial, y el posterior tránsito de maquinaria pesada durante la instalación del gasoducto produjeron un fuerte impacto sobre las propiedades físicas del suelo. La mayor limitación de los suelos disturbados fue su baja capacidad para incorporar agua, derivada principalmente de su elevada compactación y baja porosidad, lo que explicaría en parte la lenta recuperación de la cobertura vegetal en la zona 1. En ninguno de los tres sitios estudiados, la reposición del material removido por la actividad del desmonte significó una medida de recuperación eficaz

  18. A heterogeneidade tecnológica da pecuária leiteira em Minas Gerais

    André Rozemberg Peixoto Simões

    2017-09-01

    Full Text Available A heterogeneidade dos sistemas de produção de leite de Minas Gerais é uma das causas de instabilidade das relações comerciais da cadeia produtiva e das dificuldades de direcionamento de políticas públicas. Neste sentido, objetivo deste trabalho foi caracterizar espacialmente a heterogeneidade tecnológica dos sistemas de produção de leite das 66 microrregiões do estado de Minas Gerais. Para isso, estimou-se um modelo fatorial a partir de 15 variáveis de tecnologia e de escala de produção e foi construído um Índice de Modernização da Pecuária Leiteira. A análise cluster realizada com este índice permitiu classificar espacialmente as microrregiões em 4 níveis tecnológicos. Os resultados podem subsidiar estratégias de formulação de políticas públicas regionalizadas e elaboração de planos de atividades privadas.

  19. Cubierta vegetal frente a laboreo en dos zonas con distinta disponibilidad hídrica: influencia sobre producción, vigor, calidad y estado hídrico de la vid

    Díez Bueno, Nuria

    2012-01-01

    El objetivo de este trabajo es evaluar la influencia de una cubierta vegetal frente al laboreo convencional en dos tipos de suelo con diferente dotación hídrica (suelo de pendiente con riego y suelo de vaguada sin riego) y su influencia sobre el estado hídrico de la planta, la producción, el vigor y la calidad. El presente trabajo final de carrera se realizó en una parcela de viñedo plantado en 1980 de la variedad Tempranillo injertado sobre patrón 41B, de conducción en espaldera, de c...

  20. A DEMANDA POR CARVÃO VEGETAL E SUAS CONSEQUÊNCIAS ECONÔMICAS SOBRE O AGRONEGÓCIO DO EUCALIPTO NO BRASIL

    LEANDRO PESSOA LUCENA

    2014-08-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} As agroindústrias que consomem biomassa florestal têm crescido a taxas expressivas nos últimos anos, principalmente as que demandam: celulose e papel, siderurgia a carvão vegetal, painéis de madeira para móveis e construções civis, toras extraídas para exportação in natura, entre outros. Porém, o que mais se tem destaque, e preocupações socioeconômicas e ambientais, é a produção de carvão vegetal como insumo-produto a atividade siderúrgica. Logo, esse trabalho teve como objetivo apresentar essa dependência de consumo das siderurgias pelo carvão vegetal e a relação desse consumo com a expansão da Silvicultura do Eucalipto. Para tanto, utilizou-se o Modelo de Correlação Linear e o MMMQ como instrumentos de análise estatística do grau de influência e relação do Carvão Vegetal sobre a Produção de Eucalipto e vice-versa. Os resultados encontrados apresentaram uma projeção crescente e linear da atividade Silvícola do Eucalipto, a fim de atender uma expressiva necessidade de elevação da produção de Carvão Vegetal como principal insumo-produto demandado pelas siderurgias. Sob o ponto de vista do agronegócio esses resultados

  1. Letramento, heterogeneidade e alteridade: análise de narrativas orais produzidas por uma mulher não-alfabetizada

    Leda Verdiani Tfouni

    2005-01-01

    Full Text Available

    Este trabalho tem por objetivo investigar narrativas orais produzidas por uma mulher não-alfabetizada do ponto de vista da instalação da heterogeneidade discursiva. A heterogeneidade é vista e detectada em uma dimensão constitutiva e em uma dimensão mostrada. A discussão baseia-se ainda no conceito de letramento, e, partindo do pressuposto de que existe uma interpenetração do discurso da oralidade e do discurso da escrita, procura detectar como, nas narrativas analisadas, esta alteridade constituída por quem sabe ler e escrever, é indiciada no discurso do não-alfabetizado. As narrativas apresentadas - “As três estrelas de ouro na testa” e “A Branca Flor de Antuninho”- foram produzidas por Madalena de Paula Marques: uma mulher não-alfabetizada e moradora da periferia de Ribeirão Preto-SP-Brasil. A análise procura mostrar que, ao jogar com os dois tipos de heterogeneidade citados, a narradora assegura um fluxo narrativo coerente concorde à função de autoria, conforme propõe a teoria de letramento que embasa o trabalho. Apontamos ainda aqui na direção de afirmar que estas narrativas, mesmo sendo orais, apresentam marcas de escrita constituída pela heterogeneidade.

  2. Representações sobre o consumo de frutas, verduras e legumes entre fruticultores de zona rural Representations on fruit and vegetable consumption among fruit growers

    Hayda Josiane Alves

    2008-12-01

    Full Text Available OBJETIVO: O objetivo do estudo foi investigar aspectos subjetivos do consumo de frutas, verduras e legumes entre agricultores. MÉTODOS: Trata-se de um estudo qualitativo sobre o universo simbólico do consumo de frutas, verduras e legumes entre fruticultores da zona rural, do município de Valinhos, estado de São Paulo, Brasil. Foram empregadas técnicas de observação participante e entrevista não estruturada focalizada. Para tratamento de dados foi utilizada a teoria das representações sociais de Moscovici. RESULTADOS: A representação central das falas analisadas é: fruta não é comida, é trabalho, a qual tem função estruturante de outras representações relativas a fruta: 1 não tem função de alimentar; 2 seu consumo não é essencial; 3 garante a sobrevivência do trabalho familiar no campo, representando o sustento familiar. Apesar de cultivadas e consumidas rotineiramente, são consideradas comida somente quando são compradas. Verduras e legumes são classificados como alimentos de importância secundária. Conceitos de alimentação saudável expressos pelo grupo contemplam elementos que vão além do valor nutricional dos alimentos, incluindo: prazer, comensalidade, valores sócio-culturais, memória familiar e celebrações. CONCLUSÃO: O consumo de frutas relaciona-se mais à esfera do trabalho na lavoura do que a elementos que a aproximem ao conceito de comida. As representações sociais relativas a Frutas Verduras e Legumes contribuem com a formulação de conceitos subjetivos de alimentação saudável e estruturam as práticas alimentares dos agricultores.OBJECTIVE: The objective of this study was to investigate subjective aspects in the consumption of fruits and vegetables by fruit growers. METHODS: This is a qualitative study on the symbolic universe of consumption of these food items among fruit growers living in the rural area of Valinhos, a city located in the state of São Paulo, Brazil. Participant

  3. Cover crop with Teramnus labialis in a citrus orchard: effects on some physical properties of the soil / Cubierta vegetal con Teramnus labialis en plantaciones citrícolas: efectos sobre algunas propiedades físicas del suelo Cubierta vegetal con Teramnus labialis en plantaciones citrícolas: efectos sobre algunas propiedades físicas del suelo

    Leydis Castellano Rodríguez

    2009-03-01

    Full Text Available The use of leguminous cover crops in citrus orchards constitutes a viable alternative for the improvement of soil properties, whenever they are appropriately managed. In Ciego de Avila University, Cuba, it was evaluated the effect of a leguminous cover crop on some properties of an orchard soil. The work was carried out during four years in an orange plantation of Valencia late (Citrus sinensis L. Osbeck in a 22 years-old orchard, with a plantation frame of 8 X 4 m, planted on a typical red Ferralitic soil, belonging to the CPA ¨José Martí¨, in Ciego de Avila. It was used a random block design with three treatments: one with covering of Teramnus labialis (T1, one with expontaneous vegetation (T2 and the third with no vegetation (T3. The functional structure properties of the soil were determined, and also the composition of macroaggregates expressed in the structure coefficient and the percentage of stable added in water, soil density, humidity and porosity. The increments in the humidity of the soil, the specific volume of pores and air, the structure coefficient, as well as the percentage of stable added in water, in the soil where the covering of Teramnus labialis was stablished, show the efficiency of cover crops in these citrus orchards.El uso de coberturas vivas de leguminosas en plantaciones citrícolas constituye una alternativa viable para el mejoramiento de las propiedades de los suelos, siempre que ellas se manejan adecuadamente en estas áreas. En la universidad de Ciego de Ávila, Cuba se viene trabajando en la evaluación del efecto de coberturas vivas de leguminosas en plantaciones citrícolas en producción, con el objetivo de evaluar el efecto que ejerce la cobertura de leguminosa sobre algunas propiedades del suelo. El trabajo se realizó durante cuatro años (2001-2005 en una plantación de naranja Valencia Late ( Citrus sinensis L. Osbeck en producción de 22 años, con marco de plantación de 8 X 4 m, plantada sobre un

  4. Heterogeneidad regional en las diferencias por género en las tasas de desempleo en Colombia

    Enrique López-Bazo; Juan C. Duque; Gustavo A. García; Paula Herrera-Idágarra

    2015-01-01

    Este trabajo describe la diversidad regional que presentan las brechas de desempleo entre hombres y mujeres en Colombia y evalúa en qué medida dichas brechas se deben a diferencias en los patrones de demanda laboral de las distintas ciudades. Los resultados muestran que, en efecto, las brechas están relacionadas con factores de demanda, pero esa relación es en parte endógena a la heterogeneidad regional en (las diferencias en) las características de hombres y mujeres, que afectan su propensió...

  5. Breve revisión sobre características de la cutícula vegetal y penetración de herbicidas

    María del C. Lallana

    2006-01-01

    Full Text Available Se presenta una breve revisión sobre las características de la cutícula de las plantas y su relación con la penetración de los herbicidas, así como los factores que afectan dicha penetración. Se tienen en cuenta aspectos estructurales, como características de las ceras de la cutícula, y ambientales que determinan la correcta absorción de los herbicidas. Se hace referencia a los estudios realizados sobre Eryngium horridum, la presencia de estomas y la penetración diferencial de los herbicidas en el haz y en el envés de las hojas.

  6. Environmental indicators of intra-urban hetererogeneity Indicadores ambientales para detectar la heterogeneidad intra-urbana Indicadores ambientais para detectar heterogeneidade intraurbana

    Matildes S. Prado

    2013-06-01

    Full Text Available A large number of human diseases are related to poor access to water and sewer systems, inadequate solid waste management and deficient storm water drainage. The goal of this study was to formulate environmental sanitation indicators and classify sanitation conditions in specific sewer basins and their respective neighborhoods. The database used contains information on the following sanitation components in these areas: water supply, sewer systems, urban drainage, road pavement, building typology and public cleaning. Data was analyzed using cluster analysis. The key variable of each component was identified, and eight sewer basins and twenty-three neighborhoods were classified into the following categories: good, regular, and poor. The use of environmental sanitation indicators allows decision makers to identify critical areas and define priorities for improving environmental sanitation conditions.Varias enfermedades que afectan a los seres humanos están vinculadas a la deficiencia en el acceso a servicios de agua y alcantarillado, la gestión inadecuada de los residuos sólidos y el deficiente sistema de drenaje de aguas pluviales. Este estudio trata de desarrollar indicadores de salud ambiental y clasificar las áreas dentro de las ciudades. Se utilizó una base de datos que contiene información sobre: limpieza urbana, abastecimiento de agua, alcantarillado, drenaje y calles, pavimentación de las calles y tipología de construcción en diferentes barrios. Se aplicó la técnica de clúster para el análisis de datos. Se identificó la variable que mejor representa cada componente y veintitrés áreas de la ciudad se clasificaron en tres categorías: buena, regular y mala. El uso de indicadores de salud ambiental permitió la identificación de áreas críticas y el establecimiento de prioridades en la inversión para la salud y mejora del medio ambiente.Várias patologias que acometem os seres humanos estão ligadas à deficiência de

  7. Efeito da cobertura vegetal sobre a pérola-da-terra (Hemiptera: Margarodidae na cultura da videira = Effect of cover crops on brazilian ground pearl (Hemiptera: Margarodidae in vineyards

    Marcos Botton

    2010-10-01

    Full Text Available O uso da cobertura vegetal em vinhedos é uma prática empregada paraminimizar a erosão e melhorar as qualidades químicas e físicas do solo. Neste trabalho, foi avaliado o efeito de coberturas vegetais sobre a população da pérola-da-terra Eurhizococcus brasiliensis (Hemiptera: Margarodidae na cultura da videira. No primeiro experimento, o vinhedo foi mantido sem cobertura vegetal por meio da aplicação trimestral do herbicida glifosato comparado com o uso de vegetação espontânea, durante o ano, de vegetação espontânea, no verão, e de aveia preta no inverno. No segundo experimento foi avaliado o efeito da mucuna-preta (Stizolobium aterrimum cultivada no vinhedo durante o verão comparado com a vegetação espontânea. No primeiro experimento, a população da pérolada-terra nas raízes de plantas de videira foi maior em áreas mantidas sem cobertura vegetal emostrou-se semelhante em áreas onde se manteve a vegetação espontânea, ao longo do ano, e com aveia preta no inverno e vegetação espontânea no verão. A infestação das plantas de videira em áreas onde foi empregada a mucuna-preta durante o verão foi equivalente à da vegetação espontânea. S. aterrimum foi registrada pela primeira vez como hospedeira de E. brasiliensis. The use of cover crops is an important strategy to reduce erosion and improve chemical and physical soil properties. In this work, we evaluate the effect of cover crops to reduce Brazilian ground pearl Eurhizococcus brasiliensis (Hemiptera: Margarodidae infestation in vineyards. In the first experiment, glyphosate was sprayed each three months to avoid cover crops. This treatment was compared with naturally occurring vegetation during the year and the use of Avena sativa in the winter. In a second experiment, Stizolobium aterrimum was cultivated during the summer compared with naturally occurringvegetation. Brazilian ground pearl population was higher in glyphosate sprayed areas than where cover

  8. Especificidades de usuários(as de drogas visando uma assistência baseada na heterogeneidade Especificidades de usuários (as de drogas visando una asistencia basada en la heterogeneidad Drug users' specifics aiming the assistance based in the heterogeneity

    Jeane Freitas de Oliveira

    2007-12-01

    Full Text Available O artigo enfoca a heterogeneidade de grupos e de pessoas usuárias de drogas, com ênfase nas especificidades de mulheres. Trata-se de revisão da literatura sobre o fenômeno das drogas e saúde, a partir de textos selecionados que utilizam a variável empírica sexo. Foram identificadas diferenças no consumo de drogas entre homens e mulheres e especificidades entre mulheres tanto em relação a aspectos epidemiológicos quanto aos determinantes sócio-culturais do fenômeno. Identificou-se que a taxa de consumo, tipo da droga, idade, mortalidade e comorbidade foram aspectos responsáveis pelas principais diferenças de gênero. Especificamente em grupos de mulheres, foram identificadas diferenças relacionadas ao tipo de droga versus idade e procura por tratamento versus tipo de atividade desenvolvida pela unidade de saúde. Os dados demonstram que a assistência às pessoas usuárias de drogas deve contemplar especificidades individuais e de grupos.El artículo enfoca la heterogeneidad de grupos y de personas usuarias de drogas, con énfase en las especificidades de mujeres. Se trata de una revisión de la literatura sobre el fenómeno de las drogas y la salud, a partir de textos seleccionados que utilizan la variable empírica sexo. Fueron identificadas diferencias en el consumo de drogas entre hombres y mujeres y especificidades entre mujeres, tanto en relação a aspectos epidemiológicos, cuanto a las determinantes socioculturales del fenómeno. Se identificó que la tasa de consumo, tipo de droga, edad, mortalidad y comorbidad fueron aspectos responsables por las principales diferencias de género. Específicamente en grupos de mujeres, fueron identificadas diferencias relacionadas al tipo de droga versus edad y busca por tratamiento versus tipo de actividad desarrollada por la unidad de salud. Los datos demuestran que la asistencia a las personas usuarias de drogas debe contemplar especificidades individuáis y de grupos.This paper

  9. Influence of shrub cover vegetal and slope length on soil bulk density; Influencia de la cubierta vegetal arbustiva y la longitud de la ladera sobre la densidad aparente del suelo

    Bienes, R.; Jimenez, R.; Ruiz, M.; Garcia-Estringana, P.; Marques, M. J.

    2009-07-01

    In arid and semiarid environments of the Mediterranean climate, the shrub species play an important role in the revegetation of abandoned lands, which enables to control the soil losses, organic material and water. In this article are compared the results obtained under different revegetation in abandoned lands in the central area of Spain. In these revegetation has been used two native shrubs: A triplex halimus (Ah) and Retama sphaerocarpa (Rs), and were analyzed the influence of these revegetation in the contents of organic material of soil and apparent density in 5 years time after planting. As control, have been considered the pieces of ground with spontaneous vegetation abandoned in the same date that the shrubs revegetation. Atriplex halimus gives to the soil a covering capable to intercept a big amount of water drops absorbing a great amount part of the kinetic energy of the rain, while provides a microclimates as a result of be able to soften the wind, the temperature and the evaporation-transpiration, which makes it efficient to control the erosion and the desertification (Le Houerou, 2000). Retama sphaerocarpa was chosen because it is a native shrub very characteristic, and, due to its symbiosis with the Bradyrhizobium, enriches the soil in nitrogen, which is taken by the nitrophilous species enhancing the spontaneous vegetal covering. (Author) 9 refs.

  10. Heterogeneidad clínica de la demencia y severidad de la apraxia en pacientes con demencia tipo Alzheimer

    Daniel G. Politis

    2013-11-01

    Full Text Available La evolución clínica de la Enfermedad de Alzheimer presenta gran heterogeneidad clínica. Se han descripto diferentes subtipos clínicos, entre ellos Mayeux et al. (1985 reportan la existencia de 4, que presentan diferentes niveles de severidad cognitiva y funcional. La diversidad clínica de estos no ha sido claramente investigada.La evolución clínica de la Enfermedad de Alzheimer presenta gran heterogeneidad clínica. Se han descripto diferentes subtipos clínicos, entre ellos Mayeux et al. (1985 reportan la existencia de 4, que presentan diferentes niveles de severidad cognitiva y funcional. La diversidad clínica de estos no ha sido claramente investigada.Objetivos: estudiar la severidad de demencia, la severidad de la apraxia y el deterioro funcional en relación con los subtipos clínicos de Mayeux en pacientes con Demencia tipo Alzheimer (DTA. Se evaluaron 49 pacientes con diagnóstico de DTA. Se encontraron correlaciones estadísticamente significativas entre la clasificación de Mayeux con la severidad de la demencia, la severidad de la apraxia y el deterioro funcional.La severidad de demencia, de la apraxia y el deterioro funcional parece acompañar los diferentes subtipos clínicos descriptos por Mayeux, por lo cual la evaluación y detección de las mismas podrían contribuir a la clasificación clínica y pronóstico de la DTA.

  11. APUNTES SOBRE ALGUNOS REGULADORES DEL CRECIMIENTO VEGETAL QUE PARTICIPAN EN LA RESPUESTA DE LAS PLANTAS FRENTE AL ESTRÉS ABIÓTICO

    Licet Chávez Suárez; Alexander Álvarez Fonseca; Ramiro Ramírez Fernández

    2012-01-01

    El estrés abiótico es una de las principales causas de las pérdidas de las producciones agrícolas a nivel mundial. Los reguladores del crecimiento vegetal tales como el ácido abscícico, el etileno, el ácido jasmónico y el ácido salicílico son esenciales en la respuesta de las plantas al estrés abiótico. Se describen las generalidades de estas moléculas así como su función en la respuesta de la planta frente al estrés abiótico.

  12. Apuntes sobre algunos reguladores del crecimiento vegetal que participan en la respuesta de las plantas frente al estrés abiótico

    Chávez Suárez, Licet; Álvarez Fonseca, Alexander; Ramírez Fernández, Ramiro

    2012-01-01

    El estrés abiótico es una de las principales causas de las pérdidas de las producciones agrícolas a nivel mundial. Los reguladores del crecimiento vegetal tales como el ácido abscícico, el etileno, el ácido jasmónico y el ácido salicílico son esenciales en la respuesta de las plantas al estrés abiótico. Se describen las generalidades de estas moléculas así como su función en la respuesta de la planta frente al estrés abiótico. The abiotic stress is one of the most significative cause of th...

  13. Sincronía en la comunicación pedagógica y heterogeneidad de los grupos en el nivel de conocimientos previos: efectos en el aprendizaje en aulas digitales

    Luis Facundo Maldonado Grandados

    2010-10-01

    Full Text Available Este artículo presenta los resultados de una investigación interesada en evaluar los efectos de la heterogeneidad de los grupos de estudiantes en el nivel de conocimientos previos y la sincronía en la comunicación de los mismos, sobre el aprendizaje de un dominio de conocimiento en un escenario de aula virtual. Se tomaron estudiantes de un curso de lógica matemática y se distribuyeron en dos grupos: uno integrado por estudiantes con conocimientos previos similares, y otro por estudiantes con conocimientos previos heterogéneos, los dos evaluados mediante un pre-test. Cada estudiante fue asignado aleatoriamente a uno de dos subgrupos: uno que usó como mecanismo de comunicación pedagógica el foro y otro que utilizó el chat. Por último, se diseñó un aula virtual siguiendo un Modelo de Reducción de Diferencias. La investigación concluye mostrando el efecto positivo del aprendizaje en contextos heterogéneos y la importancia del trabajo en equipo de los estudiantes. Se prueba que el Modelo de Reducción de Diferencias es un derrotero eficaz para lograr educación de alta calidad en aulas virtuales.

  14. Sinergia entre aditivo vegetal e níveis crescentes de promotores de crescimento sobre o desempenho produtivo e morfometria intestinal de frangos de corte

    Fabiano Gomes Gonçalves

    2014-02-01

    Full Text Available Objetivou-se avaliar o efeito da adição de níveis crescentes de antibióticos associados ao farelo integral de pimenta rosa (FIPR sobre o desempenho produtivo e morfometria intestinal de frangos corte. Utilizaram-se 528 pintos Cobb, machos, distribuídos em um delineamento inteiramente casualizado, com seis tratamentos e quatro repetições de 22 animais cada, constituído pelos grupos T1 - Controle Negativo (CN - Dieta basal sem FIPR e sem antibióticos; T2 - Controle Positivo (CP - Dieta Basal com 1,2% FIPR; T3 - CP + 11ppm bacitracina zinco e 17ppm salinomicina; T4 - CP + 22ppm bacitracina zinco e 34ppm salinomicina; T5 - CP + 33ppm bacitracina zinco e 51ppm salinomicina; T6 - CP + 45ppm bacitracina zinco e 67ppm salinomicina. No período de 1-43 dias de idade, observou-se que a adição de FIPR com ou sem antibiótico reduziu (P≤0,05 o consumo e melhorou a conversão alimentar, comparado com CN. Verificou-se que os frangos alimentados com FIPR associado aos antibióticos, em valores acima de 22mg kg-1 de bacitracina de zinco e 34mg kg-1 de salinomicina, tiveram maiores alturas de vilosidades intestinais que o CN (P≤0,05. O FIPR pode ser utilizado em substituição aos antibióticos sem queda de desempenho animal e com a manutenção da viabilidade e do fator de produção.

  15. Estabilidade monetária e CEPAL: A heterogeneidade do pensamento estruturalista latino-americano

    PEDRO LUIZ APRIGIO

    2018-03-01

    Full Text Available RESUMO O artigo verifica a hipótese de homogeneidade estrita do pensamento estruturalista latino-americano em matéria de estabilidade monetária em seus anos iniciais. Em meados da década de 1950, o crescente e contínuo fenômeno inflacionário na região era explicado pela CEPAL como resultante da presença de estrangulamentos nas estruturas reais da economia. Entretanto, o canal de transmissão ao nível de preços é explicado pelos autores de maneiras diversas, gerando-se, por conseguinte, diferentes propostas de estabilização. O artigo sublinha a flexibilidade metodológica e o grau de fragmentação teórica da abordagem cepalina, bem como a controvérsia sobre a inflação constituir parte do processo de desenvolvimento. A análise destes elementos revela uma tensão entre os aspectos keynesianos anglo-saxônicos na abordagem de Prebisch e a original teoria latino-americana proposta por Noyola e Furtado. Avalia-se em que medida este descompasso impediu a constituição de um corpo teórico diferenciado em matéria de estabilização monetária.

  16. EFEITO DA COBERTURA VEGETAL DO SOLO SOBRE A ABUNDÂNCIA E DIVERSIDADE DE INIMIGOS NATURAIS DE PRAGAS EM VINHEDOS EFFECTS OF COVER CROPS ON THE ABUNDANCE AND DIVERSITY OF NATURAL ENEMIES OF GRAPEVINE PEST

    MARCOS ANTÔNIO MATIELLO FADINI

    2001-12-01

    Full Text Available O controle de pragas da videira no Brasil restringe-se basicamente ao uso de inseticidas, devido à inexistência de trabalhos que visem a complementar o manejo de pragas através de controle biológico. Neste trabalho, objetivou-se verificar o efeito de diferentes coberturas vegetais nas entrelinhas de plantio de videira sobre a abundância e diversidade de potenciais inimigos naturais de pragas da videira no município de Caldas, região Sul do Estado de Minas Gerais. Foram testadas sete diferentes coberturas de solo (aveia-preta, aveia-preta e ervilhaca, ervilhaca, cobertura morta, uso de herbicida, capina mecânica e mato roçado. A cobertura vegetal do solo influenciou tanto a diversidade quanto a abundância de inimigos naturais, sendo o consórcio de aveia-preta e ervilhaca, cultivadas simultaneamente, o tratamento que proporcionou maior diversidade e abundância de inimigos naturais. Assim, a cobertura vegetal do solo pode, potencialmente, ser um componente importante em programas de manejo integrado de pragas na cultura da videira.The control of grapevine pests in Brazil is only based in the use of chemical products. It is due to the whole absence of experimental works developed to test and evaluate alternative control systems, like the biological control. The objective of this work was to evaluate the effect of different types of cover crops, placed between the cultivation lines of grapevine, in the abundance and diversity of natural control arthropods of grapevine pests. The experiment was conduced in the EPAMIG, Caldas Research Farm, located in the Minas Gerais State, Brazil. They Were tested seven different systems of soil covering. The presence of vegetal covering was beneficial to improve the diversity as well as the abundance of biological control agents present on the grapevine crop. The cultivation of black oat and pea together, was the treatment that showed the better result to diversity and abundance. Therefore, the cover

  17. Ideas previas sobre el reino vegetal en niños entre los 7 y 10 años de tercero de primaria de la Escuela Normal Superior Distrital María Montessori (E.N.S.D.M.M.)

    Daniela Gomez; Daniela Velasco

    2015-01-01

    La presente investigación busca reconocer las ideas previas sobre el reino vegetal en niños entre los 7 y 10 años. Se eligió un grupo de 37 estudiantes de tercero de primaria perteneciente a la E.N.S.D.M.M., con los cuales se implementó un instrumento de caracterización tipo cuestionario conformado por 3 preguntas referentes al reino vegetal. A partir de las respuestas dadas por los niños, se clasificaron sus ideas previas generando categorías de estas, posterior a ello, con la referencia de ...

  18. CLASIFICACIÓN NO SUPERVISADA DE COBERTURAS VEGETALES SOBRE IMÁGENES DIGITALES DE SENSORES REMOTOS: “LANDSAT - ETM+” NONSUPERVISED CLASSIFICATION OF VEGETABLE COVERS ON DIGITAL IMAGES OF REMOTE SENSORS: "LANDSAT - ETM+"

    Mauricio Arango Gutiérrez

    2005-06-01

    Full Text Available La diversidad de especies vegetales presentes en Colombia y la falta de inventario sobre ellas hace pensar en un proceso que facilite la labor de los investigadores en estas disciplinas. Los sensores remotos satelitales como el LANDSAT ETM+ y las técnicas de inteligencia artificial no supervisadas, como los Self-Organizing Maps - SOM, podrían proveer una alternativa viable para avanzar en la obtención rápida de información que corresponda a zonas con diferentes coberturas vegetales presentes en la geografía nacional. La zona propuesta para el caso en estudio fue clasificada de forma supervisada por el método de máxima similitud en otro trabajo de investigación en ciencias forestales y se discriminaron ocho tipos de coberturas vegetales. Esta información sirvió como patrón de medida para evaluar el desempeño de los clasificadores no supervisados ISODATA y SOM. Sin embargo, la información que proveen las imágenes debió ser depurada previamente de acuerdo a los criterios de uso y calidad de los datos de manera que se utilizara la información adecuada para estos métodos no supervisados. Para esto se recurrió a varios conceptos como las estadísticas de las imágenes, el comportamiento espectral de las comunidades vegetales, las características del sensor y la divergencia promedio que permitieron definir las mejores bandas y sus combinaciones. Sobre éstas se aplicó el concepto de análisis de componentes principales que permitió reducir el número de datos conservando un gran porcentaje de la información. Sobre estos datos depurados se aplicaron las técnicas no supervisadas modificando algunos parámetros que pudieran mostrar una mejor convergencia de los métodos. Los resultados obtenidos se compararon con la clasificación supervisada a través de matrices de confusión y se concluye que no hay una buena convergencia de los métodos de clasificación no supervisada con este proceso para el caso de las coberturas vegetales

  19. Relación entre la heterogeneidad del paisaje y la riqueza de especies de flora en cuencas costeras del estado de Veracruz, México

    Ángel Priego Santander

    2012-02-01

    Full Text Available La heterogeneidad del paisaje varía en el espacio dependiendo de la proporción entre polígonos y unidades tipológicas. La alta variabilidad del espacio geográfico le confiere una elevada connotación ecológica, lo cual sugiere una estrecha relación con la distribución de la biodiversidad. El objetivo de este estudio es conocer si se puede predecir la riqueza de especies a través de indicadores de variabilidad espacial. Para esclarecer esto, se exploró la relación entre heterogeneidad del paisaje y la riqueza de flora, en tres cuencas costeras del estado de Veracruz. La riqueza, dominancia, abundancia y diversidad de los paisajes resultaron variables explicativas de la riqueza de especies. Los modelos obtenidos explican más de 75% de la relación. Estos resultados indican que la riqueza de especies de flora puede ser pronosticada por valores de heterogeneidad del paisaje. Se sugiere explorar la probable existencia de zonas de elevada biodiversidad en áreas de difícil acceso o poco conocidas, con el uso de sensores remotos.

  20. Efeitos da Heterogeneidade de Variância Residual entre Grupos de Contemporâneos na Avaliação Genética de Bovinos de Corte Effects of Heterogeneity of Residual Variance among Contemporary Groups on Genetic Evaluation of Beef Cattle

    Roberto Carvalheiro

    2002-07-01

    Full Text Available O objetivo deste estudo foi investigar, por meio de dados simulados, o efeito da heterogeneidade de variância residual entre grupos de contemporâneos (GC sobre as avaliações genéticas de bovinos de corte, e comparar o uso de uma avaliação genética ponderada (R¹Isigmae² em relação à avaliação que pressupõe homogeneidade de variância (R=Isigmae². A característica estudada foi ganho de peso pós-desmame corrigido para 345 dias, sendo esta simulada com variância fenotípica de 300 kg² e herdabilidade igual a 0,4. A estrutura de um conjunto real de dados foi utilizada para fornecer os GC e os pais referentes às observações de cada animal. Cinco níveis de heterogeneidade de variância residual foram considerados de forma que os componentes de variância fossem, na média, iguais aos da situação de homogeneidade de variância. Na medida em que níveis mais acentuados de heterogeneidade de variância residual foram considerados, os animais foram selecionados dos GC com maior variabilidade, especialmente com pressão de seleção intensa. Em relação à consistência de predição, os produtos e as vacas tiveram seus valores genéticos preditos mais afetados pela heterogeneidade de variância residual do que os touros. O fator de ponderação utilizado reduziu, mas não eliminou o efeito da heterogeneidade de variância. As avaliações genéticas ponderadas apresentaram resultados iguais ou superiores àqueles obtidos pelas avaliações que assumiram homogeneidade de variância. Mesmo quando não necessário, o uso de avaliações ponderadas produziu resultados não inferiores às avaliações que assumiram homogeneidade de variância.The objective of this study was to investigate, via simulated data, the effect of heterogeneity of residual variance among contemporary groups (CG on genetic evaluation of beef cattle, and to compare a weighted genetic evaluation procedure (R¹Isigmae² with one that assumes homogeneity of

  1. Evaluación del impacto de un ensayo comunitario sobre el consumo de frutas y verduras en Colombia Evaluation of the impact of a community intervention on the consumption of fruits and vegetables in Colombia

    Gloria Esperanza Prada

    2007-02-01

    Full Text Available OBJETIVO: Evaluar el impacto de una intervención alimentaria sobre la frecuencia de consumo de frutas y verduras (FV en el municipio de Girón, Santander, Colombia. MATERIAL Y MÉTODOS: Durante diez meses se realizó un ensayo comunitario donde 66 familias usuarias de 14 hogares comunitarios (HC recibieron una intervención alimentaria basada en estrategias educativas. Setenta y tres familias en doce HC sirvieron como grupo control. La frecuencia del consumo de FV fue evaluada en mediciones repetidas con un cuestionario de frecuencia de consumo. La evaluación se realizó en dos niveles, familiar y HC. El Método de Bland y Alman fue utilizado para determinar el impacto intragrupal e intergrupal. Un modelo de regresión lineal múltiple permitió evaluar el efecto de la intervención sobre la frecuencia de consumo de FV ajustado por variables sociodemográficas. RESULTADOS: La frecuencia de consumo de frutas aumentó en promedio 1.3 veces por semana; (IC 0.3-1.8 (p= 0.040. Esto se logró cuando la probabilidad de contar con una licuadora fue mayor de 75% (R² para el modelo 0.33; n= 26. La frecuencia del consumo de verduras no aumentó. CONCLUSIONES: En poblaciones pobres puede lograrse un incremento en el consumo de frutas a través de estrategias de tipo educativo. Sin embargo, el acceso limitado a equipos de transformación y conservación de alimentos es determinante del resultado final.OBJECTIVE: To evaluate the impact of an alimentary intervention on the frequency of consumption of fruits and vegetables (FV in the municipality of Girón, Santander, Colombia. MATERIAL AND METHODS: A community intervention was carried out over a ten-month period, where 66 families who use fourteen community homes (HC received an alimentary intervention based on educational strategies. Seventy-three families in twelve HC served as a control group. The frequency of FV consumption was evaluated by repeated measurements using a food frequency questionnaire. The

  2. Heterogeneidade espacial da dengue em estudos locais, Niterói, RJ Heterogeneidad espacial del dengue en estudios locales, Niteroi, Sureste de Brasil Spatial heterogeneity of dengue fever in local studies, City of Niterói, Southeastern Brazil

    Regina Fernandes Flauzino

    2009-12-01

    Full Text Available OBJETIVO: Analisar a ocorrência espacial e temporal da dengue e sua associação com a heterogeneidade de características do ambiente urbano. MÉTODOS: Foram georreferenciados 1.212 casos de dengue registrados no Sistema de Informação de Agravos de Notificação entre 1998 e 2006, no município de Niterói, RJ, segundo setores censitários. Os setores foram classificados em áreas homogêneas para a ocorrência da doença: favela, estaleiro e urbano. Os casos foram agrupados em cinco períodos: dois interepidêmicos 1998-2000 e 2003-2005; três epidêmicos 2001, 2002 e 2006 e analisados por meio de operações entre camadas em ambiente sistema de informação geográfica. Para identificação de conglomerados com maior intensidade de casos, utilizou-se o método de kernel. O método de varredura espacial de Kulldorff foi usado para confirmação estatística desses clusters. RESULTADOS: Do total de casos, 57% eram do sexo feminino. As faixas etárias com maior concentração de casos foram de 20-29 anos (20,5% e de 30-39 anos (17,7%. O setor favela morro apresentou somente 11% dos domicílios atendidos por serviço de coleta de lixo, o maior percentual de não alfabetizados (8,7% e de chefes de família com rendimentos menores de 1 salário mínimo (29,5%. Os casos permaneceram nos setores denominados favelas. No primeiro ano epidêmico e nos períodos interepidêmicos o maior número de casos estava situado nos setores favelas morro e favela plana; no segundo e terceiro ano de epidemia, situavam-se no setor favela plana. CONCLUSÕES: A parcela economicamente ativa foi a mais atingida na área de estudo. Os setores censitários mostram heterogeneidade espacial em relação às condições de vida e dentro de alguns setores, há diferenciais na distribuição espacial e temporal do risco de ocorrência da dengue.OBJETIVO: Analizar ocurrencia espacial y temporal del dengue y su asociación con la heterogeneidad de características del ambiente

  3. Heterogeneidad en el acceso a la educación media y el trabajo infantil. Disparities in Access to Educational Media and Child Labor

    Facundo Luis Crosta

    2007-03-01

    Full Text Available En este documento se presenta una forma novedosa de analizar los efectos del trabajo infantil sobre el acceso al sistema educativo. Los resultados muestran que el análisis integrado del logro en el sistema educativo permite identificar más adecuadamente las heterogeneidades en el acceso al mismo. Para esto se construye un índice de categorías ordenadas que permite dar cuenta de algunos de los diversos matices que puede adoptar la forma en que se relacionan los individuos con el sistema. El análisis se basa en microdatos provenientes de la Encuesta de Condiciones de Vida (ECV de 2001 para la Argentina. Se muestra que el trabajo infantil es una variable significativa al momento de explicar porqué algunos individuos no se encuentran en el nivel educativo correspondiente a su edad; además, las interacciones de la condición de ocupación con las variables edad, género y pobreza revelan que este efecto se agrava especialmente a partir de los 15 años entre los hombres pobres. Son las características observables individuales como la edad y el sexo las que marcan diferencias en las probabilidades de acceso a la educación; y por lo tanto, se convierten en instrumentos relevantes para las políticas públicas. Además, este resultado sugiere que una política de transferir la misma cantidad de dinero a todos los estudiantes que asisten al nivel medio, sin considerar su edad y género, no pareciera ser la mejor respuesta para resolver el problema de desempeño en este nivel. Se requiere de un estudio en mayor profundidad para poder evaluar la simultaneidad de las decisiones de trabajo y estudio y la relación de ellas con los recursos monetarios disponibles en el hogar. This paper presents an innovative way of analyzing the effects of child labor on the access to the educational system. The results show that an integrated analysis of achievement in the educational system allows for a more precise identification of the heterogeneities involved in

  4. Impacto de las heterogeneidades medioambientales sobre la glicosilación de anticuerpos monoclonales producidos por cultivo in vitro de hibridomas /

    Serrato Pérez, José Antonio sustentante.

    2009-01-01

     tesis que para obtener el grado de Doctor en Ciencias Bioquímicas, presenta José Antonio Serrato Pérez ; asesor Octavio Tonatiuh Ramírez Reivich. III, 134, [38] páginas : ilustraciones. Doctorado en Ciencias Bioquímicas UNAM, Instituto de Biotecnología, 2009

  5. Ideas previas sobre el reino vegetal en niños entre los 7 y 10 años de tercero de primaria de la Escuela Normal Superior Distrital María Montessori (E.N.S.D.M.M.

    Daniela Gomez

    2015-12-01

    Full Text Available La presente investigación busca reconocer las ideas previas sobre el reino vegetal en niños entre los 7 y 10 años. Se eligió un grupo de 37 estudiantes de tercero de primaria perteneciente a la E.N.S.D.M.M., con los cuales se implementó un instrumento de caracterización tipo cuestionario conformado por 3 preguntas referentes al reino vegetal. A partir de las respuestas dadas por los niños, se clasificaron sus ideas previas generando categorías de estas, posterior a ello, con la referencia de las 3 fuentes de origen (sensorial, social y analógica siendo la social en la cual se basa este trabajo; se generaron dos sub-categorias (experiencia cotidiana y  experiencia académica y, en esta última  se tuvieron en cuenta los modelos explicativos de nutrición vegetal para lo cual fue necesario analizar conceptos claves como respiración, morfología, metabolismo e interacciones con el medio. Como resultado de la caracterización se determinó que las construcciones mentales sobre el reino vegetal en estos estudiantes son mediadas por la experiencia cotidiana y son frecuentemente nutridas, modificadas o adecuadas por este a pesar de lo adquirido en la escuela, además se estableció que los modelos de nutrición vegetal más comunes en las representaciones de los niños a esta edad son el edáfico y el de transmutación

  6. Deposição efetiva do produto pulverizado sobre cobertura vegetal de aveia-preta por diferentes pontas de pulverização Effective deposition of product sprayed directly on oat cover using different spray nozzles

    R.L. Contiero

    2012-12-01

    Full Text Available A cobertura vegetal que permanece no solo após a colheita beneficia as características físicas e químicas do solo. No entanto, essa palha torna-se uma barreira para a aplicação de herbicidas pré-emergentes, pois impede que eles atinjam o alvo. Nesses casos, a escolha ideal da ponta de pulverização, bem como o tamanho da gota, são imprescindíveis para o sucesso da aplicação. O objetivo deste trabalho foi avaliar a eficiência de transposição do líquido pulverizado, dependente do tamanho de gotas, produzido por vários modelos de ponta de pulverização sobre diferentes densidades de palha de aveia-preta. O trabalho foi realizado em Maringá-PR. Foram utilizadas caixas tipo gerbox como unidades coletoras, cobertas por diferentes quantidades de palha de aveia. O delineamento experimental foi inteiramente casualizado, em esquema fatorial 8 x 7, sendo oito pontas de pulverização (leque e cone e sete quantidades crescentes de palha de aveia-preta. O produto retido na superfície coletora foi colhido e mediu-se a absorbância. Os dados foram submetidos à análise de variância, e as médias, comparadas entre si por meio do teste de agrupamento Skott-Knott a 5% de probabilidade. Pode-se concluir que o tamanho das gotas é extremamente importante na transposição da palha de aveia. Gotas muito finas e muito grossas não conseguem transpor a barreira formada pela palha de maneira eficiente. Pontas de pulverização que produzem gotas de tamanho médio (CV-IA 02 e ST 02 apresentam volume de transposição maior do que o das demais, sendo recomendadas em aplicações de herbicidas pré-emergentes em plantio-direto até 4 t ha-1 de cobertura morta.The vegetation that remains in the soil after harvest benefits the physical and chemical properties of soil. However, the straw becomes a barrier to the application of pre-emergence herbicides, preventing it from reaching the target. In these cases, the choice of spray tip and droplet size is

  7. Gradiente latitudinal de riqueza de espécies de formigas em cerrado: regra de Rapoport e efeitos da produtividade e heterogeneidade

    Ribas, Carla Rodrigues

    2006-01-01

    O gradiente latitudinal de riqueza de espécies (GLRE) é um padrão bem documentado para diversos grupos de organismos. Apesar de várias hipóteses terem sido levantadas para explicar o gradiente algumas são tidas como mais promissoras, tais como as relacionadas à energia, a heterogeneidade ambiental, ao tempo evolutivo e ao efeito do domínio mediano. O objetivo dessa tese é testar a existência do gradiente latitudinal de riqueza de espécies de formigas arborícolas em cerrado, assim como testar ...

  8. Efectos del pastoreo sobre el suelo y la vegetación en la Estepa Patagónica Grazing effects on soil and vegetation in the Patagonian Steppe

    Juan José Gaitán

    2009-12-01

    Full Text Available La ganadería ovina durante más de 100 años produjo grandes cambios en los ecosistemas y es una de las principales causas de la desertificación en la estepa patagónica. Este trabajo tiene por objetivo evaluar los efectos del pastoreo sobre el suelo y la vegetación mediante la aplicación de una versión modificada de la metodología «Landscape Function Analysis» desarrollada en Australia. El estudio se realizó en siete sitios con distintos niveles de degradación por pastoreo en Pilcaniyeu (noroeste de Río Negro: tres clausurados al pastoreo (CLA, tres bajo pastoreo moderado (PM y uno bajo pastoreo intenso (PI. Se evaluaron indicadores de la composición florística y estructura espacial de la vegetación, del estado de la superficie del suelo en los interparches, los cuales fueron integrados en tres Índices de Función (Estabilidad -EST-, Infiltración -INFy Reciclaje de nutrientes -NUT- y el stock de carbono orgánico (CO. Al incrementarse la intensidad de pastoreo se observó una disminución en la cobertura basal de la vegetación (47,4; 23,2 y 17,4% en CLA, PM y PI, respectivamente, parches vegetados más distanciados entre sí (61,9; 117,9 y 181,7 cm, menor cobertura de gramíneas palatables (26,3; 3,4 y 2,1% y mayor de no palatables (4,4; 15,8 y 17,6%. También se observó una tendencia a disminuir en los Índices de Función del suelo (EST: 43,0; 42,3 y 36,2; INF: 48,3; 41,7 y 36,2; NUT: 33,1; 23,5 y 18,1 y del CO (33,8; 26,5 y 7,9 t/ha al incrementarse la intensidad de pastoreo. Se requieren más estudios para adaptar esta metodología a las condiciones de Patagonia y testear con datos experimentales de que manera los índices reflejan adecuadamente los procesos y funciones de estos ecosistemas.More than 100 years of sheep breeding has caused profound changes to ecosystems and is one of the main causes of desertification in the Patagonian steppe. The aim of this study was to evaluate sheep grazing effects on soils and

  9. Determinación de heterogeneidad y anisotropía en aluvión por micro-tomografía sísmica de cross-hole

    Armando L Imhof

    2012-06-01

    Full Text Available Con el propósito de analizar el comportamiento sísmico de muestras de suelo a escala de laboratorio; se desarrolló e implementó un sistema tomográfico basado en transmisión de ondas en el rango acústico en dominios bi-dimensionales con escasa cobertura espacial (cross-hole para determinar diferentes propiedades de materiales granulares en general y en la detección de anomalías. El objetivo fué, a partir de la medición de ondas compresionales, detectar variaciones en el grado de compactación del mismo, buscando la determinación de heterogeneidad y anisotropía. Para los ensayos se utilizaron 14 piezocristales de propósito general de 6kHz de frecuencia resonante como emisores (7 y receptores (7 de ondas mecánicas en el rango acústico, montándose en lados opuestos en un marco rígido rectangular de madera blanda. El conjunto marco-sensores se introdujo en un recipiente metálico de forma cilíndrica que se llenó luego con arena clasificada de río. 10ms de repetición; aplicados directamente sobre los transductores. El receptor consistió en un amplificador de bajo ruido de dos canales con filtros pasa-altos de 100Hz a la entrada, con ganancias regulables aproximadamente entre los 40 y 80dB. Se conectó el sistema a un DSO Tektronix TDS 210 con interfase RS232 para almacenamiento de datos a PC. Los resultados posibilitaron detectar tanto heterogeneidad como anisotropía vertical en el material debido al peso de las capas suprayacentes (anisotropía por esfuerzo que produjeron un aumento en la densidad del material y por lo tanto incremento de la velocidad y curvatura de rayos. Con los datos se pudo establecer una ley de incremento de velocidades en función de la profundidad.In order to analyze the seismic behavior of soil samples at laboratory scale, it was developed and implemented a tomographic system based on wave transmission on the acoustic range in bi-dimensional domains with limited spatial coverage (cross-hole, to

  10. Experiences with the Irradiation of Vegetables in The Netherlands; Essais d'Irradiation de Legumesaux Pays-Bas; Opyt oblucheniya ovoshchej v Niderlandakh; Experimentos Sobre Irradiacion de Verduras en Los Paises Bajos

    Staden, O. -L. [Institute for Research on the Storage and Processing of Horticultural Produce, Wageningen (Netherlands)

    1966-11-15

    The author surveys recent experiences in the Netherlands of the effect of irradiation (electrons and gamma rays) on different vegetables. In this work main attention was given to the possibilities of prolonging the shelf life, namely, effects on the living product. The reaction of-the tomato, among others, to electrons and gamma rays is discussed. These rays cause complete loss of the internal structure. Mention is made of the strong presumption that neck- rot of the onion cannot be controlled by ionizing radiation, and some orienting trials with cut vegetables, packed in plastic and unpacked, are discussed. Possibility of the irradiation of mushrooms is reported more extensively; five favourable results are obtainable. However, an experiment with times of processing successively postponed showed that the possibilities are less than was expected initially. Irradiation cannot be applied to ''sauerkraut'' due to discolourations which are rapidly manifested. Treatment of dried curly kale with 1.5-MeV electrons showed decreasing cooking time and rigidity with increasing krad doses, while samples treated with doses higher than 1000 krad became organoleptically unacceptable. (author) [French] L'auteur donne un apercu d'experiences recentes faites aux Pays-Bas sur les effets de l'irradiation (electrons et rayons gamma) de quelques legumes tres differents. Au cours de ces travaux, on a surtout etudie les possibilites de prolonger la duree de conservation, en d'autres termes les effets sur le produit vivant. L'auteur examine notamment les diverses reactions de la tomate sous l'effet des electrons et des rayons gamma. Ces derniers detruisent completement la structure interne de la tomate. Il precise qu'il y a de fortes raisons de penser que la pourriture du collet de l'oignon ne peut pas etre enrayee par les rayonnements ionisants. En outre, il discute certains essais faits avec des legumes coupes, en vrac ou conditionnes dans des emballages en matiere plastique. Il expose

  11. As hemerotecas digitais discursivizadas na web: heterogeneidade discursiva e formação imaginária na rede

    Francis Lampoglia

    2011-10-01

    Full Text Available Este trabalho estuda o funcionamento discursivo de duas páginas da web, sendo uma do Arquivo Público do Estado, referente à hemeroteca do jornal Última Hora, e outra referente ao site do jornal O Estado de S. Paulo, mais precisamente à seção "Especiais", intitulado "Nas páginas do Estadão, a luta contra a censura". Sob a orientação da Análise do Discurso de matriz francesa, fundada por Michel Pêcheux, com o apoio dos estudos sobre o dialogismo de Mikhail Bakhtin e das discussões sobre o virtual de Pierre Lévy, esse trabalho visa compreender o modo como são produzidos efeitos de sentido sobre o entrelaçamento de vozes que compõem as páginas web analisadas, bem como analisar qual a formação imaginária que tais sites constroem de si e de seus leitores através do discurso eletrônico. Inseridos em um ambiente eletrônico, os sites que abrigam acervos de jornais e revistas, além de constituir um arquivo sob uma perspectiva histórica, também tentam construir uma imagem de si e/ou do jornal que abrigam. Entendendo que a rede mundial de computadores é uma realidade, destacamos a importância de se estudar o discurso presente nos sites como forma de romper com a suposta neutralidade da imprensa e da web.

  12. A symmetrical approach to mammal cancer: heterogeneity, regulation and embodiment Una aproximación simétrica al cáncer de mama: heterogeneidad, regulación y corporización

    Jorge Leandro Castillo Sepúlveda

    2012-11-01

    Full Text Available

    Cancer is commonly described as the uncontrolled reproduction of abnormal cells in the body. This definition enacts the disease as a local process, whose temporality is linear. In this article we challenge this approach, from a case study on breast cancer, analysed from the actor-network theory. Starting from the conception of disease as a material-semiotic trajectory, we establish the role of regulation and the processes of pre-symptomatic diagnosis in the materiality of cancer. Echoing the proposal of Alfred North Whitehead, we define cancer as a potential object. Then, we describe how propositions are articulated in biomedical patients, affect their anatomy and establish an authentic embodiment, which acts as a socio-material assemblage. We conclude that it is necessary to think about interventions that consider the heterogeneity of the material aspects that come with cancer, conceived from this perspective.

    El cáncer es comúnmente descrito como la reproducción incontrolada de células anormales en el cuerpo. Esta definición constituye la enfermedad como un proceso local, cuya temporalidad es lineal. En este trabajo ponemos en cuestionamiento tal enfoque a partir de un estudio de caso sobre el cáncer de mama, analizado desde la teoría del actor-red. Iniciando desde la concepción de la enfermedad como una trayectoria semiótico-material, establecemos el papel que juegan la regulación y los procesos de diagnóstico pre-sintomático en la materialidad del cáncer. Haciendo eco de la propuesta de Alfred North Whitehead, definimos el cáncer como un objeto potencial. Luego, describimos cómo las proposiciones biomédicas se articulan en las pacientes, afectan su anatomía y establecen una auténtica corporización que se comporta como un agenciamiento socio-material. Concluimos que se hace necesario pensar en intervenciones que consideren la heterogeneidad de aspectos materiales que conlleva el c

  13. Heterogeneidad del color en formulaciones de merkén elaboradas a partir de ecotipos de ají (Capsicum annuum L.) cv. "Cacho de cabra"

    Leonelli Cantergiani, Gina N; Díaz Becerra, Christian M; Tighe Neira, Ricardo M; Castillo Rubio, Claudia G; Pardo Díaz, Fernando L.; Birlouez-Aragon, Inès

    2011-01-01

    En el presente trabajo se evaluó la heterogeneidad del color en cinco muestras de merkén formuladas a partir de ecotipos de ají, Capsicum annuum L., cv. "Cacho de cabra" cultivados en la Región de La Araucanía y Región del Maule, Chile. La evaluación se realizó mediante la extracción y cuantificación del contenido de carotenoides. Las variables evaluadas en la cuantificación de carotenoides fueron carotenoides rojos (R) y carotenoides amarillo-naranja (A). Además, se utilizó el sistema de col...

  14. Arritmias cardiacas generadas por heterogeneidad electrofisiológica: estudio mediante simulación Cardiac arrhythmias generated by electrophysiological heterogeneity: simulation study

    Oscar Henao

    2007-08-01

    Full Text Available Las arritmias ventriculares usualmente se presentan como consecuencia de isquemia miocárdica aguda, lo cual causa la mayoría de las muertes súbitas. La heterogeneidad cardiaca tanto funcional (diferente comportamiento eléctrico en los miocitos como bioquímica (diferentes concentraciones iónicas en isquemia, altera el comportamiento eléctrico del ventrículo y genera dispersión en la repolarización del potencial de acción, por lo que se convierte en sustrato funcional para la generación de arritmias fatales. En este trabajo se revisan las técnicas experimentales para el estudio y la detección de arritmias por reentrada, y se valida un modelo geométrico de isquemia, en presencia de heterogeneidad eléctrica en la región transmural de la pared ventricular. Para ello se utilizaron simulaciones bidimensionales de un modelo biofísicamente detallado y se obtuvieron reentradas lobulares en diferentes configuraciones de las células M de la pared ventricular.Ventricular arrhythmias usually appear as consequence of acute myocardial ischemia, responsible for most of sudden deaths. Functional (different electrical behavior of myocytes as well as biochemical (different ionic concentrations during ischemia cardiac heterogeneity alter the ventricle electric performance and generate dispersion in the action potential repolarization that turns into functional substrate for the generation of fatal arrhythmias. In this work the experimental techniques for the study and detection of arrhythmias by re-entry are reviewed and a geometrical model of ischemia is validated in the presence of electrical heterogeneity in the trans-mural region of the ventricular wall. For this purpose, bi-dimensional simulations of a detailed biophysical model were used and lobular re-entries in different configurations of the M cells of the ventricular wall were obtained.

  15. Kuchler Vegetation

    California Natural Resource Agency — Digital version of potential natural plant communites as compiled and published on 'Map of the Natural Vegetation of California' by A. W. Kuchler, 1976. Source map...

  16. Wieslander Vegetation

    California Natural Resource Agency — Digital version of the 1945 California Vegetation Type Maps by A. E. Wieslander of the U.S. Forest Service. Source scale of maps are 1:100,000. These compiled maps...

  17. Sustitución de lardo por grasa vegetal en salchichas: incorporación de pasta de aguacate. Efecto de la inhibición del oscurecimiento enzimático sobre el color Substituição do toucinho por gordura vegetal em salsichas: adição da pasta de abacate. Efeito da inibição do escurecimiento enzimatico na cor

    Ubaldo Rueda-Lugo

    2006-06-01

    Full Text Available La sustitución de grasa animal es importante para mejorar la calidad nutricional de los alimentos de origen animal. Tradicionalmente, los embutidos contienen cantidades relativamente altas de grasas insaturadas, por lo que se ha buscado la sustitución parcial o total de estas con grasas o aceites de origen vegetal. El aprovechamiento del aguacate como fuente de grasa vegetal es una alternativa para este tipo de productos. La oxidación de este fruto es uno de los principales problemas durante la industrialización. En este trabajo se han añadido dos inhibidores del oscurecimiento enzimático, ácido ascórbico y eritorbato de sodio, para determinar el efecto de éstos sobre el color de salchichas de cerdo. Se han encontrado diferencias en la luminosidad de las muestras con respecto al tratamiento control, además de que este mismo parámetro se ha reducido con el tiempo de almacenamiento. No ha habido efecto significativo de los antioxidantes sobre las otras componentes del color. El uso de eritorbato de sodio en la elaboración de pasta de aguacate ha reducido el oscurecimiento de la pasta durante su congelación, sin afectar mayormente otros parámetros de color del producto terminado. La aceptación del producto por un grupo de consumidores ha sido aceptable.A substituição da gordura animal ou toucinho é importante para melhorar a qualidade nutricional dos alimentos de origem animal. Tradicionalmente, os embutidos contêm quantidades relativamente elevadas de gorduras insaturadas, e a substituição parcial ou total com gordura vegetal ou óleo é desejável. O abacate é fonte de gordura vegetal como uma alternativa para este tipo de produto. A oxidação desta fruta é um dos problemas principais durante a industrialização. Neste trabalho foram adicionados dois inibidores de escurecimento enzimatico, ácido ascórbico e eritorbato do sódio, para determinar o efeito destes na cor das salsichas. As diferenças na luminosidade das

  18. Estudio integrado sobre la anemia de Fanconi: aproximación a las bases moleculares del fallo medular y de la microftalmia

    Prieto Remón, Inés

    2013-01-01

    RESUMEN: La anemia de Fanconi es una enfermedad genética rara. Presenta una gran heterogeneidad de síntomas clínicos, que van desde una aplasia medular precoz (pérdida del conjunto de células hematopoyéticasL pasando por una elevada tendencia a padecer cáncer hasta una gran variedad de anomalías congénitas. En esta tesis se ha realizado un estudio molecular sobre diferentes aspectos de la anemia de Fanconi en tres de los subtipos de la enfermedad (FA-A, FA-C y FA-D2) en un mode...

  19. VEGETATION MAPPING IN WETLANDS

    F. PEDROTTI

    2004-01-01

    Full Text Available The current work examines the main aspects of wetland vegetation mapping, which can be summarized as analysis of the ecological-vegetational (ecotone gradients; vegetation complexes; relationships between vegetation distribution and geomorphology; vegetation of the hydrographic basin lo which the wetland in question belongs; vegetation monitoring with help of four vegetation maps: phytosociological map of the real and potential vegetation, map of vegetation dynamical tendencies, map of vegetation series.

  20. Recent Research on the Irradiation of Fruits and Vegetables; Recherches Recentes sur l'Irradiation des Fruits et Legumes; Poslednie issledovaniya po oblucheniyu fruktov i ovoshchej; Investigaciones Recientes Sobre la Irradiacion de Frutas y Verduras

    Sommer, N. F.; Maxie, E. C. [University of California, Davis, CA (United States)

    1966-11-15

    Radiation treatments of fruits and vegetables after harvest have evoked much interest for the control of market diseases, insect infestation, delay of ripening and prevention of growth. Radiation as a fungicidal treatment is of special interest because of its therapeutic action. Unfortunately, the dose is often severely limited by host sensitivity. The tolerance to irradiation varies; among species and varieties and is influenced by ripeness at time of treatment. If destined for storage, commodities may be limited to a low dose because of delayed adverse effects. The suppression of a pathogen depends primarily on its sensitivity and the extent of lesion development. Commonly a large portion of small fungus lesions are inactivated while others are delayed. To date, radiation treatments have been most promising where disease problems were most serious, as in the treatment of highly perishable commodities that are harvested when ripe and contain established disease lesions when picked. Presumably the fungicidal effect of radiation treatments could be greatly improved if pathogens could be made more sensitive, the host more resistant, or both. Use of a localized oxygen effect, chemical sensitization of pathogens, or shallow irradiation have presented formidable difficulties. More promise has been shown by combinations of radiation and heat which provide a striking synergism when used to inactivate fungi. Gamma-irradiation inhibits ripening of some fruits but is stimulatory to others. In those fruits which are caused to ripen more rapidly by irradiation, ethylene production is stimulated. Fruits in which ripening is inhibited by irradiation apparently have a reduced sensitivity to the ripening action of ethylene, and also produce less ethylene before ripening. At doses of 20 to 35 krad, ripening is inhibited in bananas for 4 to 15 days depending on maturity and the amount of mechanical injury to the fruit. Irradiated fruits ripen to good quality when given a standard

  1. Importancia de la heterogeneidad de hábitats para la biodiversidad de hormigas en los Andes de Colombia

    Mónica Ramírez Ramírez

    2009-04-01

    Full Text Available Entre marzo y octubre de 2002 se compararon los ensamblajes de hormigas que forrajean en el suelo en un sistema no manejado (reserva natural El Ciprés y en algunas fincas vecinas. En dos transectos de 100 m se instalaron estaciones de muestreo cada 10 m con trampa de caída (pitfall y cebo de atún epígeo durante 880 h y 92 días respectivamente. En 1471 eventos de captura se determinaron 68 especies distribuidas en 26 géneros y 8 subfamilias. En el sistema silvopastoril- guayaba y en monocultivo de granadilla (Passiflora ligularis dominaron las especies de hormigas mientras que la distribución fue más equitativa en los usos del terreno con estructura vegetal más compleja (bosque, café, sucesión temprana y banco de forrajes. El sistema silvopastoril-guayaba fue el más rico en especies (31 seguido por café (30 y por el bosque y la sucesión temprana (29. El flujo de especies fue alto en bosque, café y sucesión temprana, indicando que la calidad de la matriz es factor importante para el mantenimiento de la biodiversidad.

  2. Vegetative regeneration

    George A. Schier; John R. Jones; Robert P. Winokur

    1985-01-01

    Aspen is noted for its ability to regenerate vegetatively by adventitious shoots or suckers that arise on its long lateral roots. It also produces sprouts from stumps and root collars; but they are not common. In a survey of regeneration after clearcutting mature aspen in Utah. Baker (1918b) found that 92% of the shoots originated from roots, 7% from root collars, and...

  3. Understory vegetation

    Steve Sutherland; Todd F. Hutchinson; Jennifer L. Windus

    2003-01-01

    This chapter documents patterns of species composition and diversity within the understory vegetation layer and provides a species list for the four study areas in southern Ohio. Within each of 108 plots, we recorded the frequency of all vascular plant species in sixteen 2-m² quadrats. We recorded 297 species, including 187 forbs (176 perennials, 9 annuals, 2...

  4. Importancia de la heterogeneidad de hábitats para la biodiversidad de hormigas en los Andes de Colombia

    Armbrecht Inge

    2009-06-01

    Full Text Available Entre marzo y octubre de 2002 se compararon los ensamblajes de hormigas que forrajean en el suelo en un sistema no manejado (reserva natural El Ciprés y en algunas fincas vecinas. En dos transectos de 100 m se instalaron estaciones de muestreo cada 10 m con trampa de caída (pitfall y cebo de atún epígeo durante 880 h y 92 días respectivamente. En 1471 eventos de captura se determinaron 68 especies distribuidas en 26 géneros y 8 subfamilias. En el sistema silvopastoril- guayaba y en monocultivo de granadilla (Passiflora ligularis dominaron las especies de hormigas mientras que la distribución fue más equitativa en los usos del terreno con estructura vegetal más compleja (bosque, café, sucesión temprana y banco de forrajes. El sistema silvopastoril-guayaba fue el más rico en especies (31 seguido por café (30 y por el bosque y la sucesión temprana (29. El flujo de especies fue alto en bosque, café y sucesión temprana, indicando que la calidad de la matriz es factor importante para el mantenimiento de la biodiversidad.

  5. Heterogeneidade florística das fitocenoses de restingas nos estados do Rio de Janeiro e Espírito Santo, Brasil

    Luiz Fernando Silva Magnago

    2011-04-01

    Full Text Available Esta pesquisa teve como objetivo comparar florísticamente as formações vegetacionais que compõe o ecossistema Restinga dos Estados do Rio de Janeiro e Espírito Santo. Para isto foi realizado uma compilação de dados de levantamentos florísticos e fitossociológicos, sendo utilizado para esta análise o índice de similaridade de Jaccard, onde as interpretações se deram pela média de grupo (UPGMA. As 11 formações analisadas apresentaram uma riqueza total de 990 espécies, distribuídas em 141 famílias, sendo Fabaceae (73, Myrtaceae (59, Rubiaceae (48, Orchidaceae (44, Cyperaceae (38, Poaceae (36, Bromeliaceae (35, Euphorbiaceae (30, Asteraceae (30 as de maior riqueza. A similaridade entre as formações foi baixa, sendo o maior valor de 33%. Os resultados obtidos denotam uma alta heterogeneidade florística existente nas formações que compõe o ecossistema Restinga nos dois Estados analisados, sendo esta determinada por diferentes fatores que atuam em cada fitocenose.

  6. INFLUÊNCIA DE DIFERENTES TÉCNICAS DE CULTIVO SOBRE O POTENCIAL ANTIOXIDANTE DE CRUCÍFERAS INFLUENCE OF DIFFERENT AGRICULTURAL CROPS UPON THE ANTIOXIDANT CAPACITY OF CRUCIFEROUS VEGETABLES.

    K. A. ARBOS

    2008-08-01

    Full Text Available

    A família Cruciferae possui exemplares importantes empregados na dieta humana, contribuindo como fonte de substâncias antioxidantes. Desta maneira, destaca-se a importância da avaliação do potencial antioxidante, uma vez que seu consumo é regular na dieta do brasileiro. No presente trabalho, a capacidade antioxidante de extratos obtidos de repolho branco, couve-manteiga, couve-flor, brócolis, agrião e rabanete, obtidos de cultivo convencional, hidropônico e orgânico quando possível, foi avaliada in vitro pelo método de redução do complexo fosfomolibdênio, usando-se a vitamina C como padrão de referência, e a rutina para comparação dos resultados. Os extratos das crucíferas avaliados demonstraram capacidade antioxidante significativamente superior às da vitamina C e rutina, porém com variação na intensidade do efeito dependendo da espécie e variedade estudadas, assim como da parte do vegetal e do tipo de cultivo. Embora devam ser interpretados com cautela, pois inúmeros fatores interferem na qualidade dos vegetais, os resultados da capacidade antioxidante aqui apresentados e discutidos favorecerem os efeitos benéficos do consumo de crucíferas, com destaque àquelas de cultivo orgânico.

    The Cruciferae family has many important species for the regular human diet as they provide many antioxidant components. Being routinely present as part of the Brazilian folk meals, it is worthy to evaluate their antioxidant potential. In the present work, the antioxidant capability of extracts prepared from white cabbage, kale, cauliflower, broccoli, watercress, and radish, obtained from conventional, hydroponic, and organic agricultural procedures whereas possible, was investigated in vitro by the chemical method of the phosphomolybdenum complex, using

  7. Efecto de la dosis de glifosato sobre la biomasa de malezas de barbecho al estado vegetativo y reproductivo Glyphosate dose effect on weed biomass at the vegetative and reproductive stage

    E. Puricelli

    2009-06-01

    Full Text Available Los experimentos se condujeron en el campo experimental de la Facultad de Ciencias Agrarias ubicado en Zavalla (Argentina durante 2005 y 2006. El objetivo de este trabajo fue estudiar la eficacia de glifosato aplicado al estado vegetativo y reproductivo de Convolvulus arvensis, Oenothera indecora, Iresine diffusa, Parietaria debilis, Rumex paraguayensis y Trifolium repens. El diseño del experimento fue completamente al azar con un arreglo factorial: año, especies, estado reproductivo y vegetativo y dosis de glifosato 48% (4X, 2X, 1X, 1/2X, 1/4X, 0X siendo X la dosis recomendada 1200 g i.a. ha-1. Se estableció la relación entre la dosis de glifosato y el control de la biomasa de las malezas a través de curvas de dosis respuesta con un modelo log-logístico. Se comparó el grado de tolerancia por medio de la DL50. En ambos estados de las malezas, la mayor DL50 obtenida para I. diffusa indica que de las especies estudiadas ésta es la más tolerante a glifosato. El número de especies tolerantes al glifosato es menor al estado vegetativo que al reproductivo.Experiments were conducted at the University of Rosario Experimental Farm, Zavalla in 2005 and 2006 to study the effect of glyphosate on the control of Convolvulus arvensis, Oenothera indecora, Iresine diffusa, Parietaria debilis, Rumex paraguayensis and Trifolium repens at the vegetative and reproductive stage. The experiments were established in a complete randomized design with the following factorial arrangement of treatments: year, species, vegetative and reproductive growth stages and glyphosate 48% (4X, 2X, 1X, 1/2X, 1/4X, 0X being 1X the recommended dose (1,200 g a.i. ha-1. The relationship between glyphosate dose and weed biomass control was established with a log-logistic model. The degree of tolerance was compared by LD50. In both stages, the higher LD50 was obtained for I. diffusa indicating that this is the species most tolerant to glyphosate among those studied. The number of

  8. componente vegetal

    Fabio Moscovich

    2005-01-01

    Full Text Available In order to determine environmental impact, indicators based on vegetation characteristics that would generate the forestry monoculture with the adjacent native forest, 32 sample unit were installed in an area of LIPSIA private enterprise, Esperanza Department, Misiones with those characteristics. The plots of 100 m2 were distributed systematically every 25 meters. The vegetation was divided in stratum: superior (DBH ≥ 10 cm, middle (1,6 cm ≤ DBH > 10 cm and inferior (DBH< cm. There were installed 10 plots in a logged native forest, 10 plots in a 18 years old Pinus elliottii Engelm. with approximately 400 trees/ha., 6 plots in a 10 – 25 years old Araucaria angustifolia (Bertd. Kuntze limiting area with approximately 900 trees/ha., and 6 plots located in this plantation. In the studied area were identified 150 vegetation species. In the inferior stratum there were found differences as function of various floristic diversity indexes. In all the cases the native forest showed larger diversity than plantations, followed by Pinus elliottii, Araucaria plantation and Araucaria limiting area. All the studied forest fitted to a logarithmical series of species distributions, that would indicate the incidence of a environmental factor in this distribution.

  9. Notas sobre a composição arbóreo-arbustiva de uma fisionomia das savanas de Roraima, Amazônia Brasileira Notes on the woody composition of a vegetation physionomy of the Roraima's savannas, Brazilian Amazonia

    Reinaldo Imbrozio Barbosa

    2005-06-01

    Full Text Available Foi realizado um inventário florístico das espécies arbóreo-arbustivas presentes em uma das unidades de vegetação que compõem a paisagem de savanas do Estado de Roraima, extremo norte da Amazônia brasileira. Esta unidade é caracterizada por ser densamente colonizada por ninhos do cupim Cornitermes ovatus Emerson. Foram observadas 29 espécies (15 famílias botânicas em três localidades utilizadas para a amostragem. O total de espécies, por localidade, variou de 12 a 20. As espécies mais abundantes foram Byrsonima verbascifolia (L. DC. e Mimosa microcephala Humb. & Bonpl. ex Willd. (subarbustivas, Byrsonima cf. intermedia A. Juss. e Randia formosa (Jack. K. Schum. (arbustivas e, Byrsonima crassifolia (L. H.B.K. e Curatella americana L. (arbóreas. Oito espécies são comuns às três localidades. A diversidade medida pelo Índice de Shannon (H' foi baixa para todos os locais amostrados (A floristic inventory of woody species was carried out in one of the vegetation units that compose the savannas landscape of the Roraima State, northernmost of Brazilian Amazonia. This unit is characterized by dense colonization of nests of termites Cornitermes ovatus Emerson. Twenty nine woody species were observed (15 botany families in three localities used for sampling. The total of species varied from 12 to 20 by locality. The most abundant species were Byrsonima verbascifolia (L. DC. and Mimosa microcephala Humb. & Bonpl. ex Willd. (dwarf shrubs, Byrsonima cf. intermedia A. Juss. and Randia formosa (Jack. K. Schum. (shrubby and, Byrsonima crassifolia (L. H.B.K. and Curatella americana L. (arboreal. Eight species are common to all localities. Diversity measured by the Index of Shannon (H' was low for all the areas sampled (<0.90 indicating high specimens concentration in few species. The Index of Sørensen indicated similarities (± 0.60 among studied areas, suggesting a group of landscapes with common plant diversity, representing a same

  10. Economic and technical considerations on the use of vegetable oils as fuel substitute for diesel oil; Consideracoes economicas e tecnicas sobre o uso de oleos vegetais combustiveis como substituto de oleo diesel

    Mourad, Anna Lucia [Universidade Estadual de Campinas (DE/FEM/UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia], Email: anna@ital.sp.gov.br

    2006-07-01

    The introduction of bio diesel in the Brazilian energy matrix has been mainly motivated by the governmental actions, which foresees social and economical development to the country in a program that allows the use of different oil seed crops as raw materials for biofuels production. Cost estimates considering the average price received by the farmer and the oil content of each vegetable shows that the minimum cost of bio fuel was about 1,1(castor bean); 1,8(peanut); 2,0(soy beans); 3,3(corn) higher than the average cost of fossil diesel from 1975 to 2004. Among the evaluated raw materials, only the palm oil had inferior cost compared to the petroleum diesel (0.6%). The oleaginous plants that have a higher oil content and smaller agricultural production cost to produce bio fuels are economically most feasible and they should be prioritized in the government program so that it may become economically sustainable along the years, as well as generate adequate profit to the farmers of each culture. The feasibility of National Program for Biofuels Use and Production and both economical and environmental aspects should also consider the destination of the main by-products of the biofuel productive chain such as the left over cakes after extraction of the oil and glycerine produced during the transesterification process. (author)

  11. Vigor, produtividade e qualidade de frutos de quatro tangerineiras e híbridos sobre quatro porta-enxertos Vegetative growth, yield and fruit quality of four mandarin and hybrid cultivars on four rootstocks

    Eduardo Sanches Stuchi

    2008-09-01

    Full Text Available Avaliaram-se o desenvolvimento vegetativo, a produção e a qualidade de frutos das cultivares-copa 'Swatow' (Citrus reticulata Blanco, 'Ellendale' [C. reticulata x C. sinensis (L. Osbeck], 'Fortune' (C. clementina hort. ex Tanaka x C. tangerina hort. ex Tanaka e 'Nova' [C. clementina x (C. paradisi Macfad. x C. reticulata] sobre limoeiro 'Cravo' (C. limonia Osbeck, citrumeleiro 'Swingle' (C. paradisi x P. trifoliata (L. Raf., tangelereiro 'Orlando' (C. reticulata x C. paradisi e tangerineira 'Cleópatra' (C. reshni hort. ex Tanaka, de 2000 a 2006. O experimento foi instalado em Bebedouro-SP, em outubro de 1997. As variáveis analisadas foram: produção anual e produção acumulada de todas as cultivares para todos os anos (2000 a 2006, qualidade de frutos em 2005 e 2006 (massa, sólidos solúveis totais, acidez total, ratio, volume da copa, diâmetro do tronco da copa, eficiência de produção (Kg frutos/m³ copa e índice de alternância de produção. A produção acumulada e a qualidade de frutos das cultivares testadas não foram influenciadas pelos porta-enxertos. O citrumelo 'Swingle' induziu menor porte às plantas das cultivares-copa. O tangelo 'Nova' apresentou características adequadas à comercialização in natura. A tangerineira 'Swatow' produziu frutos de qualidade semelhante aos de tangerineira 'Ponkan'. O tangor 'Ellendale' e a tangerineira 'Fortune' apresentaram produção de frutos baixa e irregular.Plant growth, yield, and fruit quality of 'Swatow' (Citrus reticulata Blanco, 'Ellendale' (C. reticulata x Citrus sinensis L. Osbeck, 'Fortune' (Citrus clementina Hort. ex Tan. x Citrus tangerina Hort. ex Tan. e 'Nova' [(C. clementina x (Citrus paradisi Macf. x C. reticulata] mandarins budded on 'Rangpur' lime (C. limonia Osbeck, 'Swingle' citrumelo (P. trifoliata Raf. x C. paradisi Macf., 'Orlando' tangelo (C. reticulata Blanco x C. paradisi Macf., and 'Cleopatra' mandarin (Citrus reshni Hort. ex Tan. were evaluated, from 2000

  12. PATRONES EN LA DISTRIBUCIÓN DE LA VEGETACIÓN EN ÁREAS DE PÁRAMO DE COLOMBIA: HETEROGENEIDAD Y DEPENDENCIA ESPACIAL

    ARELLANO-P. HENRY

    2008-12-01

    Full Text Available Se realizaron análisis de heterogeneidad y dependencia espacial (auto-correlación con base en la caracterización y en la distribución de coberturas en diez áreas de páramo en las cordilleras Central y Oriental de Colombia, estas metodologías pertenecen al grupo de análisis exploratorios de datos espaciales (AEDE. De las áreas estudiadas muestran un buen estado de conservación y de conectividad, la alta montaña de la serranía de Perijá, los páramos del Parque Nacional Natural Los Nevados y gran parte del área pertenecientes a los páramos de la jurisdicción de la corporación CORPOGUAVIO. La intervención de origen antrópico, el aumento del cultivo de papa, el cambio en el uso del suelo, principalmente en los páramos de la cordillera Oriental, han afectado la estructura y la distribución natural de los tipos de vegetación y han disminuido sensiblemente la conectividad entre bloques de área con lo cual se hace muy difícil cualquier proceso de re-vegetalización y recuperación. Esta situación se presenta en gran escala en los páramos La Rusia, Belén, Guantiva (hacia la vertiente Oriental, Telecom, Merchán, Tablazo, sector nororiental del páramo de Sumapaz y la vertiente Oriental de los páramos de Carmen de Carupa y sectores aledaños. Para los páramos de Guanacas y Las Delicias (área de influencia del volcán Puracé la problemática está concentrada hacia el sector noroccidental. Los resultados obtenidos, se pueden aplicar y son útiles en los procesos de restauración y conservación, puesto que proporcionan información detallada acerca de la distribución de los bloques de áreas con los tipos de vegetación, la conectividad y además, pueden utilizarse como indicadores de la salud de los ecosistemas

  13. Heterogeneidad clínica y genética en pacientes con retinosis pigmentaria en Pinar del Río. Importancia del asesoramiento genético

    Nercy Rodríguez Garcia

    2013-12-01

    Full Text Available Introducción: la retinosis pigmentaria (RP es una degeneración progresiva, crónica y de carácter hereditario de la retina, que conduce a discapacidad visual o ceguera sin un tratamiento adecuado. Objetivo: determinar la variabilidad de la expresión clínica en la presentación de la retinosis pigmentaria, así como el tipo de herencia con que se transmite en los enfermos y familias de los individuos ingresados en el servicio provincial de la enfermedad en Pinar del Río, lo que permitirá aplicar una estrategia para el asesoramiento genético individual y familiar. Material y Método: se realizó una investigación descriptiva, retrospectiva y transversal, teniendo como universo y muestra a los 259 pacientes con diagnóstico del padecimiento, registrados en el servicio provincial, de enero a septiembre del año 2012. Resultados: predominó el sexo masculino con 154 pacientes y el grupo de edades entre 40 y 59 años de edad con un 46,71 %. De acuerdo a la clasificación cubana, prevalece el debut precoz, el estadio I, la herencia autosómica recesiva y la forma típica de presentación. Resaltan el síndrome de Usher como entidad asociada y en 99 familias se determinó que la enfermedad sigue un patrón de herencia autosómico recesivo, en 38 de las cuales existe consanguinidad. Las limitaciones de estos enfermos obligan a suministrarles una información adecuada y precisa mediante los servicios de asesoramiento genético. Conclusiones: la gran heterogeneidad clínica y genética de la enfermedad ha generado que la estrategia de asesoramiento genético incluya la personalización del proceso de acuerdo a cada paciente y familia y se le brinde mayor importancia a los grupos de apoyo mutuo.

  14. Tendências atuais da pesquisa brasileira em Educação Física. Parte 2: a heterogeneidade epistemológica nos programas de pós-graduação Trends on the Brazilian research in Physical Education. Part 2: a view through the epistemological diversity in graduate programs

    Suely Rosa

    2011-03-01

    Full Text Available A fim de contribuir com o debate sobre a heterogeneidade epistemológica da Educação Física (EF e a falta de critérios adequados para avaliar a pesquisa e estudos com enfoques pedagógicos e socioculturais, o presente trabalho se propõe a caracterizar a pesquisa atual em EF que tem origem nos programas de pós-graduação (PGs no Brasil. A pergunta central é qual a principal tendência epistemológica da pesquisa originada nas PGs em EF no Brasil? Partindo desta pergunta, iniciamos uma detalhada análise da produção acadêmica de 11 PGs inseridos na área de avaliação de Educação Física. A análise baseou-se nos relatórios anuais do triênio 2001/2003, disponíveis "on-line" pela CAPES e que apresentavam as produções bibliográficas de cada PG. No total foram analisados 5.628 títulos dos diversos tipos de produção bibliográfica. Os dados sugerem que a pesquisa em EF, gerada pelas PGs, tem visibilidade muito restrita, uma vez que livros e anais, com circulação limitada, constituem-se nos principais veículos para difundir o conhecimento em EF. Os dados também indicam a prevalência de estudos com base biológica e, apoiados principalmente na fisiologia, o que reflete a construção histórica da área de EF. Entretanto, observou-se também um forte influência de outras disciplinas, ou em outras palavras uma grande heterogeneidade epistemológica.In order to contribute to the national debate on the epistemological heterogeneity in the field of Physical Education (PE and to the lack of adequate criteria to evaluate research in PE that emphasizes social and pedagogical aspects, the present study aims to characterize current Brazilian research on PE published by Graduate Programs (GP. The research question is: what is the main epistemological trend of research originated in Brazilian GPs? The data consist of a detailed analysis of the academic production of 11 GPs in PE, based on the GP triennial report (2001-2003 available on

  15. Lake Bathymetric Aquatic Vegetation

    Minnesota Department of Natural Resources — Aquatic vegetation represented as polygon features, coded with vegetation type (emergent, submergent, etc.) and field survey date. Polygons were digitized from...

  16. Averrhoa carambola L., Syzygium cumini (L. Skeels and Cissus sicyoides L.: medicinal herbal tea effects on vegetal and animal test systems Averrhoa carambola L., Syzygium cumini (L. Skeels e Cissus sicyoides L.: efeitos dos chás de plantas medicinais sobre os sistemas-teste vegetal e animal

    Mario Sergio Mantovani

    2001-05-01

    Full Text Available Since folk medicine has been greatly appreciated for centuries, many researchers decided to study more deeply the curative qualities of plants. In the present study, meristematic cells of Allium cepa L. were used as vegetal test system and bone marrow cells of Wistar rats as animal test system. Both were treated in vivo to evaluate whether the plants Averrhoa carambola L., Syzygium cumini (L. Skeels and Cissus sicyoides L. presented cytotoxic and mutagenic effects and whether they resulted in cell alterations in their morphology, chromosomes or cell cycle division. Herbal teas were prepared as normally done by the population, albeit in two different concentrations, the usual concentration and a concentration ten times higher. Rats were treated with only one concentration of teas. Results showed that teas did not alter the cell cycle of Allium cepa L., with the exception of the 24 hours analysis after suspension of treatment (recovery of treatments, with a lower concentration of Averrhoa carambola. The latter had a low mitotic index when compared to control and to the post-treatment analysis, showing an inhibition of cell division. The three herbal teas neither induced an increase in the number of chromosomal damage in bone marrow cells of Wistar rats nor altered the cell division cycle. Results are important in so far as these plants are used as therapeutic agentsAs plantas medicinais têm sido muito estudadas devido aos seus efeitos curativos. Neste estudo foram utilizados o sistema teste vegetal em células meristemáticas de Allium cepa L. e o sistema teste animal em células da medula óssea de ratos Wistar tratados in vivo para avaliação dos efeitos citotóxicos e mutagênicos das plantas Averrhoa carambola L., Syzygium cumini (L. Skeels e Cissus sicyoides L., analisando-se o ciclo de divisão celular, morfologia e cromossomos. Os chás das plantas foram preparados da maneira usada pela população e em duas diferentes concentrações, a

  17. Molecular heterogeneity of Malassezia pachydermatis through RAPD-PCR = Heterogeneidade molecular da Malassezia pachydermatis através de RAPD-PCR

    Patrícia da Silva Nascente

    2010-04-01

    Full Text Available Several methodologies in molecular biology have been used in theinvestigation of Malassezia pachydermatis and its differentiation into subtypes. Recent molecular research of this species includes the use of samples isolated from canine otitis externa and dermatitis, as well as from healthy animals, having in view an epidemiologicalstudy of the yeast. The aim of this study was to identify molecular differences in M. pachydermatis samples isolated from dogs with otitis externa. The M. pachydermatis strains were analyzed by means of the Random Amplification Primer DNA - Polimerase Chain Reaction (RAPD–PCR for molecular heterogeneity research. DNA extraction was carried out with phenol-chloroform and the RAPD technique using the AGAATCCGCC primer. A variation was observed in the number and arrangement of the bands among the 49 studied isolates, grouped into nine patterns. Isolate groupings were not found to be related to animal breed, age or sex. It was concluded that M. pachydermatis has differences in its molecular profile, as shown by the molecular technique (RAPD – PCR, which allows isolates to be classified into nine subtypes.Várias metodologias em biologia molecular têm sido aplicadas para estudar a M. pachydermatis diferenciando-a em subgrupos. Recentemente utiliza-se a investigação molecular desta espécie isolada de otite externa e dermatite, e também de isolados da mesma de animais hígidos, para um estudo epidemiológico da levedura. O objetivo deste trabalho foi identificar diferenças moleculares entre isolados de M. pachydermatis obtidos de casos de otite externa canina. Para isto, amostras da levedura provenientes de cães com esta enfermidade foram estudadas através da técnica de Polimorfismo de DNA Amplificado aoAcaso - Reação da Polimerase em Cadeia (RAPD–PCR para pesquisa de heterogeneidade molecular. A extração de DNA foi realizada no processo fenol-cloroformio e a técnica de RAPD foi estudada com o primer

  18. Digital signage sobre IP

    Casademont Filella, Albert

    2012-01-01

    Projecte que versa sobre el disseny i la implementació d'un sistema de Digital Signage (Cartelleria Digital) sobre IP, creant un gestor que permeti controlar de forma remota tot un conjunt de petits dispositius connectats a pantalles que emeten continguts multimèdia com vídeos, imatges, feeds rss...

  19. Efecto de la fragmentación forestal sobre la estructura vegetacional de las poblaciones amenazadas de Legrandia concinna (Myrtaceae del centro-sur de Chile Effect of forest fragmentation on vegetation structure of Legrandia concinna (Myrtaceae threatened populations in south-central Chile

    ADISON ALTAMIRANO

    2007-03-01

    Full Text Available La fragmentación del hábitat es una de las principales amenazas para la integridad de los ecosistemas. En este estudio se evaluó el efecto de la fragmentación sobre la estructura de la vegetación en poblaciones de la especie arbórea Legrandia concinna en el centro-sur de Chile. Se describió el patrón de ocupación de las poblaciones de Legrandia en fragmentos remanentes de bosques nativos y se evaluaron las relaciones entre índices de paisaje y variables de estructura de la vegetación. Los índices de paisaje (área, índice de proximidad media, forma y distancia al borde de fragmentos fueron aplicados a mapas de cobertura forestal generados a partir de una imagen satelital Landsat ETM+ del año 2001. Los resultados mostraron una alta predominancia de fragmentos de reducido tamaño, altos niveles de aislamiento y formas regulares. El patrón de ocupación de las poblaciones de Legrandia sugiere que las poblaciones ocupan preferentemente fragmentos de menor tamaño y mayor aislamiento. No hubo diferencias significativas entre la distribución de frecuencias de los fragmentos con presencia y sin presencia de Legrandia en cuanto a área y aislamiento. Sin embargo, se obtuvo que el tamaño, aislamiento y la distancia al borde del fragmento se relacionara significativamente con la presencia de la especie. Como medida de conservación de la especie, se recomienda incluir dentro de áreas protegidas a aquellas poblaciones con mayor riesgo a desaparecer, promover su conservación ex situ y establecer un programa de monitoreo. El estudio sienta un precedente respecto a la vinculación entre información a escala de paisaje proveniente de imágenes satelitales e información de estructura de la vegetación medida en terreno, para evaluar el estado de conservación de poblaciones de especies amenazadas que cubren extensiones restringidas de territorio. Esta innovación metodológica ofrece la posibilidad de monitorear los cambios producidos en el

  20. Efecto de las heterogeneidades de textura sobre el comportamiento mecánico de una aleación superplástica de Al-6% Cu-0,4% Zr

    Eddahbi, M.

    2001-04-01

    Full Text Available Mechanical and microstructural characterization was carried out at 480 °C/5.10-4s-1 on an Al-6% Cu-0.4% Zr superplastic alloy. The as-received material showed a fine deformed substructure. A texture gradient was present through the thickness of the rolled sheet. At the surface, the texture found was close to the orientation {311}<233> whereas in the midplane of the sheet it was {631}<113>. The (s-(e tensile test curve presented three deformation stages called, stage I, II and III. The global texture in stage I increased slightly. In stage II, the intensity of orientation {311}<233> decreased, suggesting that a grain boundary sliding deformation process should take place near the surface. However, in the center of the sheet, the {631}< 113> orientation transformed to the orientation (110}< 111 > by slip process. This behaviour continued in the stage III, where the orientation {631}<113> totally disappeared.

    Se ha estudiado el comportamiento mecánico y microestructural de una aleación superplástica de Al-6% Cu-0,4%Zr a 480°C/5.10-4s-1. La microestructura en estado de recepción consta de una subestructura fina. Presenta gradientes de textura a través del espesor de la chapa. En la superficie, la textura está compuesta, principalmente, por la orientación {311}<233> mientras que en el centro por la orientación {631}<113>. La curva de tracción (s-(e presenta tres estados de deformación, llamados estados I, II y III. En el estado I la textura inicial aumenta ligeramente. En el estado II la intensidad de la orientación {311}<233> disminuye, lo que sugiere la operación de un mecanismo de deformación por deslizamiento de fronteras de grano. Sin embargo, en el centro, la orientación {631}<113> se transforma en la orientación {110}<111> por un proceso de deslizamiento de dislocaciones. Este comportamiento prosigue durante el estado III en el cual la orientación {631}< 113 > desaparece totalmente.

  1. Heterogeneidade do solo e de tamanho de amostra antes e após cultivos com abobrinha italiana em estufa plástica Heterogeinity of soil and sample size, before and after italian pumpkin cropping in a greenhouse

    Sandra Feijó

    2006-12-01

    Full Text Available O presente trabalho teve por objetivo avaliar o índice de heterogeneidade através das seguintes características químicas do solo: fósforo, potássio, percentagem de matéria orgânica, cálcio, capacidade de troca de cátions efetiva, magnésio, alumínio e pH em água 1:1, em estufa plástica, e determinar o tamanho de amostra para o solo em pousio e após cultivos. O índice de heterogeneidade foi estimado pelo método de Smith. Para todas as variáveis analisadas, o índice de heterogeneidade foi baixo e o respectivo tamanho ótimo de parcela foi igual a uma unidade básica, ou seja, um ponto amostral para as duas condições do solo. Considerando uma semi-amplitude do intervalo de confiança em percentagem da média igual a 20%, em nível 5% de probabilidade de erro, o tamanho de amostra é igual a 11 pontos amostrais, como representativo para todas as variáveis analisadas para o solo em pousio, e de nove pontos após cultivos.This research was aimed at evaluating the heterogeinity index the most important chemical characteristics (phosphorus, effective cation exchange capacity, potassium, organic matter, magnesium, H+Al and pH of a soil inside a plastic greenhouse and to determine the sample size, fallow and immediately after two cropping. The heterogeinity index was estimated through the Smith method. For all vaiables analised the heterogeinity index was low and the optimum sampling size was equal to one basic unit, that is, one sampling point for both cropping systems. Considering a half amplitude of the confidence interval in percentage of the mean equal to 20% and a 5% error confidence level, the sampling size is equal to 11 sampling points as representative for all variables analyzed for a soil both under fallow or after cropping.

  2. Apuntes sobre esporotricosis

    Londoño, Fabio

    2011-01-01

    Se hace una breve reseña histórica de las primeras comunicaciones sobre esporotricosis. Se destaca la amplia difusión de la enfermedad en nuestro país. 3. Se hace notar la no existencia de datos bibliográficos sobre formas extracutáneas. 4. Se llama la atención sobre la eficaz ayuda de la intradermo-reacción con esporotriquina en el diagnóstico de la enfermedad. 5- Se comunica un caso de esporotricosis verrugosa tratado con anfotericin B, con excelentes resultados

  3. Apuntes sobre esporotricosis

    Fabio Londoño

    1960-01-01

    Full Text Available Se hace una breve reseña histórica de las primeras comunicaciones sobre esporotricosis. Se destaca la amplia difusión de la enfermedad en nuestro país. 3. Se hace notar la no existencia de datos bibliográficos sobre formas extracutáneas. 4. Se llama la atención sobre la eficaz ayuda de la intradermo-reacción con esporotriquina en el diagnóstico de la enfermedad. 5- Se comunica un caso de esporotricosis verrugosa tratado con anfotericin B, con excelentes resultados

  4. Efectos del pastoreo sobre el banco de semillas germinable y la vegetación establecida en pastizales de montaña del centro de Argentina Grazing effects on the germinable seed bank and standing vegetation in mountain grasslands from central Argentina

    SEBASTIÁN MARQUEZ

    2002-06-01

    Full Text Available Se estudió el efecto del pastoreo sobre el banco de semillas y la vegetación establecida en pastizales naturales de montaña, en Pampa de Achala, Córdoba, Argentina. Se analizó el banco de semillas germinable a dos profundidades (0-5 y 5-10 cm, en cinco réplicas de sitios pastoreados a carga moderada-intensa y otros cinco de sitios excluidos al pastoreo por 10 años. Se registró la frecuencia de las especies presentes en la vegetación establecida y la abundancia de las especies en el banco de semillas. El pastoreo no produjo cambios significativos en el número de especies de la comunidad establecida, pero sí produjo un incremento en la diversidad de especies debido a una disminución de la frecuencia de algunos pastos perennes como Deyeuxia hieronymi y Festuca tucumanica. Se registraron sólo tres especies exóticas en los pastizales estudiados. El pastoreo no produjo cambios significativos en la riqueza ni en la diversidad de especies del banco de semillas. La densidad total de semillas en el banco tampoco cambió significativamente por efecto del pastoreo. Sin embargo, la densidad de semillas de una especie de gramínea anual, Muhlenbergia peruviana, aumentó, mientras que la densidad de semillas de una especie de pasto perenne de gran tamaño, Deyeuxia hieronymi, disminuyó significativamente con el pastoreo. Las semillas contenidas en la hojarasca de los sitios excluidos al pastoreo comprendió el 20 % del total de especies y el 43 % de la abundancia total de semillas del banco. El análisis de ordenamiento de las parcelas en función de la composición florística de la vegetación y el banco de semillas germinable, evidenció una mayor segregación de las parcelas en función del pastoreo y, en menor medida, debido a diferencias entre vegetación y banco de semillas. Tanto en los sitios pastoreados como en los sitios excluidos al ganado predominaron las especies con banco de semillas transitorio, seguidas de especies con banco de

  5. Pesquisa sobre mortalidade perinatal no Brasil: revisão da metodologia e dos resultados

    Fonseca Sandra Costa

    2004-01-01

    Full Text Available A mortalidade perinatal persiste como relevante evento em saúde pública, demandando estudos epidemiológicos, tanto para definir sua magnitude e variações temporais, como para identificar seus determinantes e apontar as intervenções adequadas. Existem ainda questões conceituais e metodológicas controversas, gerando heterogeneidade nos estudos e prováveis vieses. No Brasil, nos últimos anos, desponta uma produção crescente sobre o tema, principalmente no Sudeste e Sul. Foram revistos 24 artigos de 1996 a 2003, focalizando: definições e classificações utilizadas, fontes de dados, desenhos de estudo, formas de aferição das variáveis, modelos de análise estatística e principais resultados. A revisão mostrou a progressiva utilização de bancos de dados informatizados, principalmente o SINASC e o SIM, o pequeno número de estudos sobre natimortalidade, a incorporação ainda incipiente das classificações de causas e a discordância em relação a alguns fatores de risco.

  6. Generalization of heterogeneous alpine vegetation in air photo-based image classification, Latnjajaure catchment, northern Sweden

    Lindblad, K. E. M.

    2006-12-01

    Full Text Available

    Mapping alpine vegetation at a meso-scale (catchment level using remote sensing presents difficulties due to a patchy distribution and heterogeneous spectral appearance of the plant cover. We discuss issues of generalization and accuracy assessment in this case study when using a digital CIR air photo for an automatic classification of the dominant plant communities. Spectral information from an aerial photograph was supplemented by classified plant communities in field and by topographical information derived from a DEM. 150 control points were tracked in the field using a GPS. The outcome from three alternative classifications was analysed by Kappa statistics, user’s and producer’s accuracy. Overall accuracy did not differ between the classifications although producer’s and user’s accuracy for separate classes differed together with total surface (ha and distribution. Manual accuracy assessment when recording the occurrence of the correct class within a radius of 5 meters from the control points generated an improvement of 16 % of the total accuracy. About 10 plant communities could be classified with acceptable accuracy where the chosen classification scheme determined the final outcome. If a high resolution pixel mosaic is generalized to units that match the positional accuracy of simple GPS this generalization may also influence the information content of the image.



    Hemos llevado a cabo la cartografía de la vegetación alpina a escala media (nivel de cuenca experimental mediante interpretación remota. Esta metodología plantea dificultades debido a la distribución en mosaico de la vegetación y a la heterogeneidad del espetro obtenido. Se discuten las posibilidades de generalización de los resultados y el grado de precisión alcanzado en este caso experimental mediante fotografía aérea digital CIR aplicada a una clasificación automática de

  7. El efecto de la maternidad sobre los salarios femeninos en Ecuador

    Héctor Alberto Botello

    2015-01-01

    Full Text Available En el presente trabajo se analiza el efecto de la maternidad sobre los salarios femeninos del año 2012 en el Ecuador estudiando sobre la tenencia, el número y la estructura de edad de los hijos. La metodología implementa ecuaciones mincerianas sobre los datos del ingreso laboral provenientes de las encuestas de hogares; para posteriormente descomponer el diferencial con el método de Oaxaca Blinder con corrección sobre el sesgo de selección. Los resultados muestran que las madres ganan en promedio 7,56% menos que las no madres, presentándose una alta heterogeneidad entre las provincias analizadas y los niveles educativos. Luego de controlar la edad de los hijos se aprecia que las madres de niños de menos de 5 años ganan un 10% menos, mientras que las madres que tienen niños de más de 5 años, la disminución es de solo el 2%. Por número, si la mujer tiene a su cuidado dos hijos la brecha por maternidad promedio es del 3,7% y si tiene más de dos hijos la rebaja es del 2,26%. No obstante, la mayor parte de la brecha por maternidad en el Ecuador no está causada por el hecho de ser madres sino por sus características socioeconómicas intrínsecas.

  8. Vegetation dynamics and dynamic vegetation science

    Van der Maarel, E

    1996-01-01

    his contribution presents a review of the development of the study of vegetation dynamics since 1979, in the framework of a jubilee meeting on progress in the study of vegetation. However, an exhaustive review is both impossible and unnecessary. It is impossible within the few pages available

  9. Níveis de fitase sobre o desempenho, parâmetros ósseos e bioquímicos de suínos alimentados com ração de origem vegetal sem inclusão de fosfato bicálcico

    João Gabriel Pereira Magnago

    2015-07-01

    Full Text Available Este estudo foi conduzido com o objetivo de avaliar os níveis de fitase em rações para suínos em crescimento selecionados para deposição de carne. Foram utilizados 64 suínos mestiços (32 machos castrados e 32 fêmeas, híbridos comerciais, com peso médio inicial de 23,311±2,254 kg, distribuídos em delineamento de blocos casualizados, com quatro tratamentos, oito repetições e dois animais (um macho e uma fêmea por unidade experimental. Os tratamentos foram constituídos por uma ração controle de origem vegetal, sem inclusão de fosfato bicálcico e fitase, contendo 0,100% de fósforo disponível; e de outras três rações obtidas pela inclusão de 300, 600 e 1200 unidades de fitase (UFT kg-1 à ração controle. Os níveis de fitase influenciaram de forma linear o ganho de peso diário e consumo de ração, aumentando até o nível de 293 e 307 UFT kg-1 de ração, respectivamente, a partir do qual permaneceram em um platô. A conversão alimentar diminuiu até 255 UFT kg-1 de ração, a qual permaneceu em um platô. Os níveis de fitase não influenciaram os teores de cinzas e fósforo no metacarpo dos animais. Houve efeito linear decrescente dos tratamentos sobre o resultado bioquímico de fosfatase alcalina. Os melhores resultados de ganho de peso, consumo de ração e conversão alimentar foram obtidos, respectivamente, com os níveis de 293, 307 e 255 UFT kg-1 de ração, em suínos de alto potencial genético para deposição de carne na fase dos 55 aos 90 dias de idade.

  10. Fruits and vegetables (image)

    A healthy diet includes adding vegetables and fruit every day. Vegetables like broccoli, green beans, leafy greens, zucchini, cauliflower, cabbage, carrots, and tomatoes are low in calories and high in fiber, vitamins, and minerals. ...

  11. Vegetable Production System (Veggie)

    National Aeronautics and Space Administration — The Vegetable Production System (Veggie) was developed to be a simple, easily stowed, high growth volume, low resource facility capable of producing fresh vegetables...

  12. European Vegetation Archive (EVA)

    Chytrý, Milan; Hennekens, S.M.; Jiménez-Alfaro, Borja; Schaminée, J.H.J.; Haveman, Rense; Janssen, J.A.M.

    2016-01-01

    The European Vegetation Archive (EVA) is a centralized database of European vegetation plots developed by the IAVS Working Group European Vegetation Survey. It has been in development since 2012 and first made available for use in research projects in 2014. It stores copies of national and

  13. Reflexões sobre a linguagem do ambiente chat no teletandem sob a perspectiva da natureza heterogênea da escrita

    Suzi Marques Spatti Cavalari

    2012-07-01

    Full Text Available O objetivo deste trabalho é discutir as características da linguagem mediada pelo computador em um ambiente de ensino e aprendizagem de língua estrangeira viabilizado pelo uso de recursos de comunicação síncrona na modalidade escrita – chat. O presente estudo se fundamenta em (i princípios teóricos sobre o uso de tecnologias e o ensino/aprendizagem de línguas estrangeiras no escopo do Projeto Teletandem Brasil: línguas estrangeiras para todos (TELLES, 2005; (ii estudos sobre as características da linguagem em interações via chat; (iii diferentes perspectivas teóricas a respeito das relações entre o oral e o escrito, enfatizando a perspectiva da heterogeneidade constitutiva da escrita (CORRÊA, 1997, 1998, 2001; e (iv em alguns conceitos pertinentes à área da Fonologia Prosódica (NESPOR; VOGEL, 1986. Toma‑se como material de análise a produção escrita de uma universitária brasileira (formanda em Licenciatura em Letras que interage com um universitário estadunidense (cursando Estudos Religiosos via Windows Live Messenger. Os dados foram coletados em um período de 5 meses, durante os quais os participantes interagiram via chat, totalizando 12 interações em inglês e em português. Na análise, enfocam-se as interações em língua portuguesa, particularmente a fragmentação das mensagens, o uso (ou não de sinais de pontuação e de abreviaturas na produção da participante brasileira, a fim de se discutirem as representações que ela constrói sobre a (sua escrita, sobre seu interlocutor, sobre si mesma e sobre o processo de ensino/aprendizagem de língua estrangeira.Palavras-chave: Língua escrita. Heterogeneidade. Chat. Teletandem.

  14. Inferencias sobre Grafos

    Sira M. Allende; Carlos N. Bouza

    2002-01-01

    El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el anal...

  15. Sobre software libre

    Matellán Olivera, Vicente; González Barahona, Jesús; Heras Quirós, Pedro de las; Robles Martínez, Gregorio

    2004-01-01

    220 p. "Sobre software libre" reune casi una treintena de ensayos sobre temas de candente actualidad relacionados con el software libre (del cual Linux es su ex- ponente más conocido). Los ensayos que el lector encontrará están divididos en bloques temáticos que van desde la propiedad intelectual o las cuestiones económicas y sociales de este modelo hasta su uso en la educación y las administraciones publicas, pasando por alguno que repasa la historia del software libre en l...

  16. Irradiation of dehydrated vegetables

    Esterhuyse, A; Esterhuizen, T.

    1985-01-01

    The reason for radurization was to decreased the microbial count of dehydrated vegetables. The average absorbed irradiation dose range between 2kGy and 15kGy. The product catagories include a) Green vegetables b) White vegetables c) Powders of a) and b). The microbiological aspects were: Declining curves for the different products of T.P.C., Coliforms, E. Coli, Stap. areus, Yeast + Mold at different doses. The organoleptical aspects were: change in taste, flavour, texture, colour and moisture. The aim is the marketing of irradiated dehydrated vegetables national and international basis

  17. Vegetable oil basestocks for lubricants

    Garcés, Rafael

    2011-03-01

    Full Text Available The use of vegetable biodegradable basestocks for lubricant oils present several advantages over the much more extended mineral bases. These advantages refer to biodegradability, a renewable feedstock of local production, lubricant and viscosity index and lower costs than synthetic lubricant bases. Despite these benefits, their use in industry and motor vehicles is not yet extensive due their lower stability and higher pour points. Vegetable oils are esters of fatty acids and glycerol, and their physicochemical properties rely mainly on the composition of their acyl moieties. Thus, to assure the maximum levels of stability while maintaining acceptable behavior at low temperatures, monounsaturated fatty acids are preferred for this purpose. The presence of natural antioxidants also improves the properties of these vegetable based stocks as lubricants. These oils usually require additives to improve their viscosity value, oxidative stability and properties at low temperatures. In the present work, the different sources of vegetable oils appropriate for biolubricant production were reviewed. Their properties and the future improvement of the oil bases, oil based stock production, uses and additives are discussed.

    El uso de bases vegetales biodegradables para aceites lubricantes presenta varias ventajas sobre las mucho más extendidas bases minerales. Estas ventajas se centran sobre todo en su biodegradabilidad, en ser un recurso renovable de producción local, en su lubricidad y en su índice de viscosidad, presentando además costes más bajos que las bases sintéticas. Sin embargo, estas ventajas no han extendido el uso de bases vegetales ni en industria ni en automoción debido a su menor estabilidad y sus mayores puntos críticos de fluidez. Los aceites vegetales son ésteres de ácidos grasos y glicerol y sus propiedades físico-químicas dependen principalmente de su composición acílica. Así, para asegurar los máximos niveles de

  18. Inferencias sobre Grafos

    Sira M. Allende

    2002-05-01

    Full Text Available El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el analizado en este trabajo. Algunos resultados experimentales obtenidos usando Recocido Simulado ilustran el procedimiento. Su papel en el estudio de modelos económicos y de mercadeo es discutido.

  19. Escrito sobre el cuerpo

    Antonio Malalana Ureña

    2013-09-01

    Full Text Available El catálogo, en una edición bilingüe español-inglés, es una pequeña guía de la exposición Shirin Neshat. Escrito sobre el cuerpo, muestra que se integra dentro de los actos de PHOTOESPAÑA13, el festival internacional de fotografía y artes visuales. El esquema del libro es sencillo y los textos son extremadamente divulgativos. El primero de ellos, Escrito sobre el cuerpo (pp. 10-15, cuyo autor es Octavio Zaya, comisario de la exposición, resume la trayectoria de esta intelectual, que "interactúa" con la fotografía y los formatos audiovisuales, y nos presenta la argumentación narrativa de los documentos expuestos, contextualizando la obra recopilada.

  20. Balkan Vegetation Database

    Vassilev, Kiril; Pedashenko, Hristo; Alexandrova, Alexandra; Tashev, Alexandar; Ganeva, Anna; Gavrilova, Anna; Gradevska, Asya; Assenov, Assen; Vitkova, Antonina; Grigorov, Borislav; Gussev, Chavdar; Filipova, Eva; Aneva, Ina; Knollová, Ilona; Nikolov, Ivaylo; Georgiev, Georgi; Gogushev, Georgi; Tinchev, Georgi; Pachedjieva, Kalina; Koev, Koycho; Lyubenova, Mariyana; Dimitrov, Marius; Apostolova-Stoyanova, Nadezhda; Velev, Nikolay; Zhelev, Petar; Glogov, Plamen; Natcheva, Rayna; Tzonev, Rossen; Boch, Steffen; Hennekens, Stephan M.; Georgiev, Stoyan; Stoyanov, Stoyan; Karakiev, Todor; Kalníková, Veronika; Shivarov, Veselin; Russakova, Veska; Vulchev, Vladimir

    2016-01-01

    The Balkan Vegetation Database (BVD; GIVD ID: EU-00-019; http://www.givd.info/ID/EU-00- 019) is a regional database that consists of phytosociological relevés from different vegetation types from six countries on the Balkan Peninsula (Albania, Bosnia and Herzegovina, Bulgaria, Kosovo, Montenegro

  1. Soil and vegetation surveillance

    Antonio, E.J.

    1995-06-01

    Soil sampling and analysis evaluates long-term contamination trends and monitors environmental radionuclide inventories. This section of the 1994 Hanford Site Environmental Report summarizes the soil and vegetation surveillance programs which were conducted during 1994. Vegetation surveillance is conducted offsite to monitor atmospheric deposition of radioactive materials in areas not under cultivation and onsite at locations adjacent to potential sources of radioactivity.

  2. Method of producing vegetable puree

    2004-01-01

    A process for producing a vegetable puree, comprising the sequential steps of: a)crushing, chopping or slicing the vegetable into pieces of 1 to 30 mm; b) blanching the vegetable pieces at a temperature of 60 to 90°C; c) contacted the blanched vegetable pieces with a macerating enzyme activity; d......) blending the macerated vegetable pieces and obtaining a puree....

  3. A biblioteca na página eletrônica do MST: heterogeneidade e memória The library in the electronic site of MST: heterogeneity and memory

    Lucília Maria Sousa Romão

    2007-12-01

    Full Text Available Esse trabalho busca, à luz da teoria do discurso, investigar como a heterogeneidade é manifesta em uma biblioteca virtual, a saber, a Biblioteca inscrita dentro do site do Movimento dos Trabalhadores Rurais Sem Terra (MST. Interessa-nos perceber como há uma memória sustentadora dos atos de linguagem e como há uma inscrição histórica dos sentidos no verbal e no imagético, que possibilitam a construção de vários gestos de leitura. Por fim, julgamos ser produtivo analisar a biblioteca como o espaço polifônico em que várias vozes estão inscritas, marcando o movimento dos sujeitos, dos sentidos, enfim, dos discursos.This work searches, at the light of the theory of speech, to investigate as the heterogeneity is obvious in a virtual library, in this case, the library in the site of the Rural Workers Movement (MST. It is interesting to know that there is a supporting memory of the language actions and a historical registration of verbal and no-verbal senses, that allow the construction of several reading gestures. Finally, we considered important to analyze the library as a polyphonic space where several voices are enrolled, marking the movement of the subjects, of the senses, that is, of the speech.

  4. Vegetation survey: a new focus for Applied Vegetation Science

    Chytry, M.; Schaminee, J.H.J.; Schwabe, A.

    2011-01-01

    Vegetation survey is an important research agenda in vegetation science. It defines vegetation types and helps understand differences among them, which is essential for both basic ecological research and applications in biodiversity conservation and environmental monitoring. In this editorial, we

  5. Impacto da promoção sobre consumo de frutas e hortaliças em ambiente de trabalho Impacto de la promoción del consumo de frutas y hortalizas en ambiente de trabajo Impact of the promotion of fruit and vegetables on their consumption in the workplace

    Amanda Da Silva Franco

    2013-02-01

    pública, en Rio de Janeiro, RJ de 2007 a 2009. El estudio fue realizado en tres etapas: a diagnóstico pre-intervención, que abarcó la caracterización de la empresa estudiada y de la proveedora de las comidas, evaluación del consumo de frutas y hortalizas por los funcionarios y la inclusión de grupo de estudio para conocer los determinantes del consumo de frutas y hortalizas y subsidiar la planificación de la intervención; b intervención, compuesta por una vertiente ambiental (comedor de la empresa y otra educativa (dirigida a los individuos; y c diagnóstico post-intervención, que incluyó impresiones sobre modificaciones en el restaurante con relación a la oferta de frutas y hortalizas, exposición de los individuos a la intervención y respectivo consumo. La asociación entre indicadores de exposición y resultado fue analizada por medio de modelos de regresión múltiple. RESULTADOS: El promedio de cobertura de las actividades y materiales educativos fue de 63,5%. La mayoría de los funcionarios percibió cambios positivos en al menos uno de los cinco aspectos examinados con relación al ambiente. El consumo de frutas y hortalizas aumentó 38,0% (0,66 porciones en la comida evaluada. Indicadores de exposición de la vertiente ambiental y de la vertiente educativa se asociaron a indicadores de resultado. CONCLUSIONES: el consumo de frutas y hortalizas aumentó entre trabajadores expuestos a la intervención de promoción de dichos alimentos en el ambiente de trabajo. El diseño multicomponente de la intervención parece haber contribuido en los resultados.OBJECTIVE: To evaluate the impact of activities promoting the consumption of fruit and vegetables (FV in the workplace. METHODS: Intervention study with historical control group conducted in a public company in Rio de Janeiro, Southeastern Brazil, between 2007 and 2009. It consisted of three stages: (a baseline, which included the characterization of both the company studied and the one responsible

  6. Terraplenes sobre suelos colapsables

    Arnedo Gaute, Diego

    2004-01-01

    Esta tesina está motivada por el diseño y construcción del Canal Segarra-Garrigues. El trazado del canal atraviesa varios pequeños valles de fondo llano mediante terraplenes sobre los cuales circula el canal. En estas vaguadas se encuentran suelos limo-arcillosos de baja densidad cuya potencia puede llegar a ser de varios metros. Estos materiales, debido a su estructura abierta, son potencialmente colapsables una vez cargados si experimentan incrementos de humedad. Las deformacion...

  7. DISCUTINDO SOBRE SEXTING

    Suzana da Conceição de Barros

    2013-07-01

    Full Text Available Na contemporaneidade, os sujeitos vêm se utilizando das diversas tecnologias digitais, para exporem e compartilharem sua intimidade, com intuito de seduzirem e tornarem-se visíveis. Esse fenômeno vem sendo chamado de sexting, e vem sendo aderido por sujeitos de várias faixas etárias. Assim, leitor/a, convido você a pensar sobre o sexting e o que a escola tem a ver com essa prática?

  8. Excertos sobre o sedentarismo

    Palma,Alexandre; Vilaça,Murilo Mariano; Assis,Monique Ribeiro de

    2014-01-01

    O sedentarismo tem sido tratado como algo perfeitamente determinável, objetivo e, portanto, que pode ser apreendido. Por outro lado, o conceito de sedentarismo ainda permanece questionável e, por conseguinte, os instrumentos mostram-se inconsistentes. Neste sentido, o objetivo do presente estudo foi mostrar que diferentes discursos de verdade vêm concorrendo por esse conceito, o que nos motiva a pensar qual é a verdade ou, até mesmo, se há alguma verdade sobre ele. Após apresentarmos diferent...

  9. Vegetation Identification With LIDAR

    Helt, Michael F

    2005-01-01

    .... The specific terrain element of interest is vegetation, and in particular, tree type. Data taken on April 12th, 2005, were taken over a 10 km 20 km region which is mixed use agriculture and wetlands...

  10. Vegetation and soils

    Burke, M.K.; King, S.L.; Eisenbies, M.H.; Gartner, D.

    2000-01-01

    Intro paragraph: Characterization of bottomland hardwood vegetation in relatively undisturbed forests can provide critical information for developing effective wetland creation and restoration techniques and for assessing the impacts of management and development. Classification is a useful technique in characterizing vegetation because it summarizes complex data sets, assists in hypothesis generation about factors influencing community variation, and helps refine models of community structure. Hierarchical classification of communities is particularly useful for showing relationships among samples (Gauche 1982).

  11. Sobre historia mundial hoy

    Vera Weiler

    2001-01-01

    Full Text Available Los procesos de globalización son una realidad; su enorme impacto sobre la vida humana los ha convertido en un tema recurrente sobre el que se escribe y se comenta a diario también en Colombia. Los libros que de ellos tratan, ante todo los que 10 hacen en tono crítico, baten records en la industria editorial en todo el mundo. Las expectativas que acerca del futuro abrigan cientos de millones de personas se relacionan con 10 que ellas esperan, para bien o para mal, de la globalización. Las posturas que los gobernantes ocupan al respecto en el mundo son, cuando menos de aceptación, generalmente de activa participación en pos de la globalización. Por un lado, crece la preocupación y se multiplican las protestas; por el otro, dominan los razonamientos de los especialistas en materia de maximización de los rendimientos de los capitales que presentan la globalización, al estilo que se viene imponiendo, como el camino ineludible del gobierno universal de la eficiencia. ¿Tienen que decir algo los historiadores frente a todo esto?.

  12. Consensos e dissensos sobre a cidade-dormitório: São Gonçalo (RJ, permanências e avanços na condição periférica

    Daniel Pereira Rosa

    2017-11-01

    Full Text Available Neste artigo, debatemos a urbanização brasileira no século XXI e a heterogeneidade da periferia metropolitana fluminense. Utilizando o exemplo da cidade de São Gonçalo (RJ, listamos referências bibliográficas e apontamos elementos que chamam atenção para a necessidade de entender o papel das cidades periféricas que, apesar da primazia metropolitana, apresentam maior integração com a região metropolitana, compondo uma parte do que alguns autores convencionaram como “periferia integrada”. Como periferia integrada, vemos que os indicadores de mobilidade pendular, o aumento das centralidades, a modernização do território e o índice de desenvolvimento nos obrigam a flexionar alguns consensos sobre essa cidade periférica lida ainda, como cidade-dormitório.

  13. Gestão ambiental nas empresas de capital aberto do segmento ‘Novo Mercado’: discutindo a homogeneidade e heterogeneidade de práticas à luz da teoria institucional [doi: 10.5329/RECADM.20121102003

    Vivianne Pereira Salas Roldan

    2012-11-01

    Full Text Available O objetivo geral deste estudo foi analisar o comportamento das empresas de capital aberto, do segmento ‘Novo Mercado’ da BM&FBovespa, quanto à adoção de práticas de gestão ambiental, à luz da teoria institucional. Em síntese, os objetivos específicos da pesquisa analisam a tendência para a homogeneidade e heterogeneidade de práticas ambientais das empresas, sua relação com a abordagem de gestão ambiental e com as pressões ambientais evidenciadas, dando destaque especial para o setor de Construção. É uma pesquisa descritiva, bibliográfica e documental, de abordagem quantitativa. Os dados foram obtidos a partir dos websites e relatórios anuais das empresas, de 2009 e 2010. Constatou-se que 66,7% das 123 empresas do Novo Mercado adotam práticas ambientais. Quanto à abordagem de gestão ambiental, 58,5% dessas empresas são proativas, 28% reativas, e 13,4% preventivas. Verificou-se que quanto mais proativa a abordagem de gestão ambiental, mais diversificadas são as pressões ambientais, e maior é a possibilidade de existir isomorfismo entre as empresas quanto à adoção de práticas sustentáveis, assim como heterogeneidade. Na análise do setor de construção, constatou-se essas possibilidades destacadas, sendo as práticas homogêneas e heterogêneas desse campo detalhadas e discutidas no estudo.   Palavras-chave Teoria institucional, Pressões ambientais, Gestão Ambiental.     ENVIRONMENTAL MANAGEMENT OF COMPANIES OF THE SEGMENT 'NEW MARKET': DISCUSSING THE HOMOGENEITY AND HETEROGENEITY OF PRACTICES IN LIGHT OF INSTITUTIONAL THEORY   ABSTRACT The aim of this study was to analyze the behavior of companies of the segment 'New Market' BM&FBovespa, on the adoption of environmental management practices in light of institutional theory. In summary, the specific objectives of the research analyzing the trend toward homogeneity and heterogeneity of environmental practices of firms, their relationship with the approach

  14. Heterogeneidade de desempenho das pequenas empresas brasileiras: uma abordagem da Visão Baseada em Recursos (VBR Performance heterogeneity of Brazilian small firms: a resource-based view approach

    Geraldo Alemandro Leite Filho

    2012-12-01

    Full Text Available O objetivo do trabalho foi verificar se as diferenças de desempenho econômico (Taxa de Crescimento das Vendas -TCV de pequenas empresas brasileiras, dentro de um mesmo setor, foram maiores do que as diferenças de desempenho econômico entre os setores. Sugeriu-se que os fatores internos (capacidades e competências organizacionais exerceriam maior influência do que os fatores externos (posicionamento estratégico e localização na heterogeneidade de desempenho econômico das pequenas empresas brasileiras. Os dados foram coletados de uma amostra de 328 pequenas empresas que mais cresceram no Brasil no ano de 2010. Os principais resultados evidenciaram diferenças significativas de desempenho econômico (TCV entre as pequenas empresas brasileiras independentemente do setor de atuação, confirmando o efeito firma na variação de desempenho. O efeito setor foi não significativo, uma vez que os resultados sugeriram não haver diferenças significativas de desempenho econômico (TCV nas pequenas empresas brasileiras a nível setorial. Observou-se ainda que a variância de desempenho econômico (TCV entre os setores de atuação das empresas foi menor do que a variância de desempenho econômico (TCV dentro do setor de atuação das empresas. Reforçou assim, o pressuposto de que os fatores internos, relacionados às empresas de forma individual, exerceram influência mais significativa do que os fatores externos na heterogeneidade de desempenho econômico. Concluiu-se que as capacidades e competências organizacionais foram distribuídas de forma heterogênea entre as firmas, causando influências diversas em seus indicadores de desempenho econômico (TCV, validando os fundamentos teóricos da Visão baseada em recursos.The aim of this study was to verify whether the differences in performance (Sales growth rate -SGR of Brazilian's small firms within the same sector were higher than the differences in economic performance between sectors. It

  15. Avaliação de critérios de heterogeneidade baseados em atributos morfológicos para segmentação de imagens por crescimento de regiões

    Rodrigo da Silva Ferreira

    Full Text Available Avalia-se neste trabalho o impacto de se considerar atributos morfológicos na formulação do critério que governa o crescimento de regiões na segmentação de imagens. Para tanto, uma extensão do algoritmo de segmentação multiresolução proposto por Baatz e Schäpe (2000 foi proposta e implementada, permitindo que se testassem critérios derivados de diferentes atributos morfológicos. O estudo valeu-se de um método supervisionado para medir numericamente a qualidade da segmentação. O resultado ideal da segmentação foi representado por um conjunto de segmentos de referência delineados manualmente para três recortes de imagens Quickbird-2. Para cada critério testado, os valores ótimos para os parâmetros do algoritmo de segmentação foram determinados por um processo estocástico que procurou minimizar a discrepância entre as referências e o resultado de cada segmentação. Uma análise tanto quantitativa quanto qualitativa dos resultados indicou inequivocamente que a inclusão de atributos morfológicos no critério de heterogeneidade, que decide a fusão entre segmentos adjacentes no processo de crescimento de regiões, pode resultar numa substancial melhoria da qualidade da segmentação. O artigo realça ainda a importância de se adotar atributos morfológicos apropriados para cada classe de objetos e tece considerações que orientam a escolha destes atributos.

  16. Voz sobre frame relay

    D´Elia, Gabriel Anibal

    2000-01-01

    Esta tesis trata el tema de VOFR, desde la digitalización de la voz hasta su transmisión a través de dicha red, así también como la comparación con otros medios de transporte como VOIP. Dada las características del protocolo frame relay y su disponibilidad se eligió como el medio más apropiado para la transmisión de voz y datos en forma integrada sobre una misma red. El trabajo comienza con una breve explicación de la voz, su digitalización y forma actual de transmisión a través de una red di...

  17. The Vegetables Turned:

    Carter, Dale

    2009-01-01

    in the relationship between creative artists and the Anglo-American popular music industry in the mid-1960s. Finally, and in retrospect, the figure of the vegetable cast into relief the counter-culture's utopian and dystopian dynamics as manifested in these song-writers' personal lives, now rendered as contemporary...... lyricist Van Dyke Parks, the incongruous, semantically complex figure of the vegetable came to illuminate aspects of psychedelic consciousness and - part by design, part by accident - the link between LSD and Anglo-American popular music. It threw light, too, on the scope and limits of changes...

  18. Sobre la muerte voluntaria

    Juan Álvarez-Cienfuegos Fidalgo

    2012-03-01

    Full Text Available El problema de cómo morir en nuestra sociedad se ha convertido en una inquietud para los ciudadanos y la reflexión moral. Especialmcnte por dos razones: por el desarrollo de la tecnología médica y por el hecho de que la mayor parte de los fallecimientos tienen lugar fuera del hogar, donde tradicionalmente ocurra el deceso. El presente artículo tiene como objetivo acercarse a esta cuestión. Para ello, se parte de la autonomía del ciudadano, con derecho a decidir sobre lo que considera cuál sea su manera de vivir y de morir. A tal fin, se hace una breve introducción sobre el dolor, el suicidio y la muerte, desde un punto de vista antropológico, pasando, después, a mostrar las cuestiones relacionadas con el problema de la eutanasia, donde la atención se dirigirá, ante todo, al enjuiciamiento crítico del tenso equilibrio en el que se mantienen dos principios fundamentales de la bioética: el de no maleficencia y el de autonomía del ciudadano.The problem of how to die in modern society has become a concern for both the citizen and moral reflection for two reasons in particular: due to developments in medical technology, and because most deaths occur outside the honre, where they traditionaÍlY took place. This paper addresses this issue, starting from citizen autonomy, the right to decide on what s/he considers to be his or her way of living and dying. To this end, a brief introduction considers pain, suicide and death from an anthropological viewpoint. Questions related to the problem of euthanasia are then exposed, with particular attention to, above all the critical judgement of the tense balance in which two fundamental principies of bioethics are held, the principle of non-maleficence and that of citizen autonomy.

  19. La perspectiva de las personas mayores sobre el testamento vital Elders´perspective about Advance Directives

    Inés Mª Barrio Cantalejo

    2006-06-01

    Full Text Available Antecedentes. La popularización del testamento vital (TV exige conocer la perspectiva que sobre él tienen sus potenciales usuarios. Cualquier intento de generalizar el TV sin evaluar cómo será recibido por las personas mayores está condenado al fracaso. Objetivo: Explorar la perspectiva de los mayores sobre el testamento vital. Diseño: Estudio cualitativo. 40 personas mayores, usuarios de 3 Centros de Salud y 1 Residencia Asistida de Madrid, se reunieron en 5 grupos de discusión en abril de 2004. Participantes: 14 mediadores captaron a 2-3 participantes cada uno. Se consideró que edad y residencia en medio familiar o institucional son las variables que más diferencian la elaboración de los discursos sobre el TV. Se utilizaron, pues, como criterios de segmentación, buscando heterogeneidad entre grupos y homogeneidad y heterogeneidad intragrupal. La saturación se consideró cuando las ideas expresadas resultaron recurrentes. Resultados: 4 ideas se extraen de los datos: 1 los mayores prefieren la planificación anticipada de decisiones al TV. 2 Su opinión sobre el TV se asocia a la vivencia singular de otros eventos en el final de la vida. 3 Conceden un papel relevante a la familia. 4 Desean conducir su propia vida, pero "sin papeles escritos". Conclusiones. La implementación del TV a través de una estrategia educativa e institucional se beneficiará si consideramos la perspectiva de la población mayor española sobre el TV.Background: The introduction of advance directives (AD require to examine the perspective their potential users have about. Any public policy about the implementation of ADs adressed to elders will fall if their perspective is unknown. Objective: To examine the elders' perspective about advance directives. Methods: Qualitative study. 40 elders, users of 3 Primary Health Care Center, and of 1 Nursing Home from Madrid. 5 focus groups were organized in 2004 April. Participants: 14 providers recruited 2

  20. leafy vegetable, Gnetum africanum

    A prerequisite for successful in vitro culture is the establishment of an aseptic technique, thus the experiment was to investigate suitable sterilization regimes for the leaf explants of Gnetum africanum, an endangered green leafy vegetable. Three sterilization regimes were tested to establish the best regime using three to four ...

  1. Canopy Modeling of Aquatic Vegetation: Construction of Submerged Vegetation Index

    Ma, Z.; Zhou, G.

    2018-04-01

    The unique spectral characteristics of submerged vegetation in wetlands determine that the conventional terrestrial vegetation index cannot be directly employed to species identification and parameter inversion of submerged vegetation. Based on the Aquatic Vegetation Radiative Transfer model (AVRT), this paper attempts to construct an index suitable for submerged vegetation, the model simulated data and a scene of Sentinel-2A image in Taihu Lake, China are utilized for assessing the performance of the newly constructed indices and the existent vegetation indices. The results show that the angle index composed by 525 nm, 555 nm and 670 nm can resist the effects of water columns and is more sensitive to vegetation parameters such as LAI. Furthermore, it makes a well discrimination between submerged vegetation and water bodies in the satellite data. We hope that the new index will provide a theoretical basis for future research.

  2. Puente sobre el Maracaibo

    Equipo Editorial

    2017-05-01

    Full Text Available Para salvar el lago de Maracaibo (Venezuela, el conocido ingeniero italiano Riccaido Morandi ha presentado un proyecto de puente para ferrocarril y carretera, de hormigón pretensado, de tramos independientes, constituyendo un sistema Gerber, que tiene una longitud total de 8.720 m y un vano central de 400 m de luz. Este último tramo, en unión de los dos adyacentes al mismo, constituirán, una vez terminada la obra, un conjunto continuo. El tablero del puente se halla a una altura de 45 m sobre el nivel del agua en la zona del canal, con objeto de permitir la navegación. El tablero, de 20,90 m de anchura total, se ha subdividido en tres partes, dos simétricas respecto al eje, laterales, de 7,20 m de anchura, para la circulación en sentidos opuestos por carretera, una plataforma central, de 5 m de ancho, para el ferrocarril y dos andenes para el paso de peatones y servicios.

  3. Sobre el nombre "Quechua"

    Rodolfo Cerrón-Palomino

    1985-06-01

    Full Text Available Uno de los primeros problemas con el que a menudo tropiezael estudioso de los idiomas ágrafos, como es el caso de las lenguasaborígenes de América, es el de su denominación (glotónimo.En la medida ,en que, por razones históricas, las noticias sobretales lenguas, y por consiguiente los primeros estudios sobre lasmismas, surgen a partir del contacto con los miembros de la civilización occidental, los nombres de los distintos idiomas, así comode los grupos étnicos que los manejan, son el resultado casi siempre arbitrario cie designaciones fortuitas hechas por viajeros, misiioneros y exploradores, quienes por lo general se basan, para ello, bien en descripciones físicas de los grupo étnicos, en ciertos indios geográficos que constituyen el habitat de los mismos, e incluso en prejuicios que se nutren de un marcado europocentrismo.

  4. EL ESTADO LÍQUIDO: DISCUSIONES SOBRE LA VOLATILIDAD DE LAS POLÍTICAS PÚBLICAS Y EVIDENCIAS DE ARGENTINA Y BRASIL (1995-2006

    Luciana CINGOLANI

    2010-01-01

    Full Text Available El artículo se propone ofrecer un análisis integral sobre la manera en que ha sido abordada la cuestión de la inestabilidad de las políticas públicas: su impacto en el desarrollo económico de los países, la heterogeneidad de enfoques teóricos que la estudian, las maneras en que ha sido conceptualizada y las posibles causas que la literatura ha delineado explicando el fenómeno. Ofrece asimismo un diagnóstico sobre los niveles de inestabilidad de las políticas en Argentina y Brasil entre los años 1995 y 2006 y discute brevemente algunas previsiones de la teoría a la luz de los resultados observados. Estos resultados arrojan una serie de conclusiones: a hay un nivel sustancialmente más alto de inestabilidad de las políticas en Argentina que en Brasil; b hay una desproporción entre la importancia del concepto como determinante del desarrollo y su sistematización como variable independiente, y c se produce una serie de contradicciones entre diferentes corrientes neoinstitucionales, y entre algunas de estas teorías y la evidencia empírica.

  5. Heterogeneidad de trayectorias laborales y temporalidades juveniles

    María Eugenia Longo

    2011-10-01

    Full Text Available Las trayectorias laborales de los jóvenes se diversifican en función de las duraciones, las etapas y las edades en las que ocurren los acontecimientos y se alcanzan ciertos roles. Sin embargo, factores clásicos asociados al origen social o al mundo del trabajo no alcanzan para comprender la diferenciación en los modos de inserción. Este artículo propone la inclusión de las temporalidades juveniles como factor clave para la comprensión de trayectorias laborales de jóvenes. Las temporalidades juveniles sirven para observar conjuntamente los marcos temporales dominantes de la inserción y la manera en la que los mismos son vividos por los sujetos. Las mismas discuten las tesis que señalan que en Argentina los jóvenes son prisioneros de un presentismo sin proyecto o que se someten inevitablemente a un contexto laboral incierto. Cuatro tipo des temporalidades han emergido en el análisis cualitativo y longitudinal de las trayectorias : los "planificadores", los "ejecutantes", los "latentes" y los "oportunistas"

  6. Identidades Culturais e Mobilidade Migratória: Estudo de Caso sobre a Identidade Diaspórica Hindu

    Mirian Santos Ribeiro de Oliveira

    2009-06-01

    Full Text Available A complexidade dos processos de construção de identidades culturais – em um contexto de intensificação e diversificação de fluxos migratórios, característico dos processos de globalização contemporâneos – está associada à coexistência de tendências à homogeneidade e à heterogeneidade, bem como à possibilidade de que tais identidades sejam construídas a partir da sociedade de origem ou da sociedade de destino. Este artigo analisa dois aspectos da construção de identidades diaspóricas por meio de um estudo de caso sobre uma identidade diaspórica específica, a “hinduidade” (Hindutva: (1 a relação entre as dimensões nacional e transnacional, em uma concepção de identidade diaspórica elaborada a partir da sociedade de origem; (2 a definição de uma identidade diaspórica em termos religiosos.

  7. Review of Vegetable Market Development in China

    Chaoping; LUO; Yuandong; NI; Qiong; ZHAI

    2013-01-01

    This paper has reviewed vegetable market development from vegetable circulation system, the develop history of the liberalize vegetable market and the growth of the vegetable wholesale market in China. From the development of vegetables market in China and its characteristics: the development of vegetable market in China is related to vegetable market system, the change of institution, some technology development and infrastructure. this paper has put forward some related measures to perfect the vegetable market and improve the vegetable circulation efficiency in China.

  8. Cruciferous Vegetables and Cancer Prevention

    ... case-control studies have found that people who ate greater amounts of cruciferous vegetables had a lower ... Professionals’ Follow-up Study—showed that women who ate more than 5 servings of cruciferous vegetables per ...

  9. Algunos apuntes sobre comunidad

    Clara Pérez Cárdenas

    2000-08-01

    Full Text Available Comunidad es, entre los temas de estudio del curriculum de los residentes en Medicina General Integral, uno de aquellos en las que mayores dificultades encontramos para poderlo impartir, pues la bibliografía sobre el tema está un tanto dispersa. Es un aspecto que los propios residentes no evalúan con justeza; sin embargo es de sumo interés que como profesionales de la salud no obviemos que nuestro trabajo de promoción, prevención y tratamiento, debe darse a nivel de individuo, pero también en las familias y en la comunidad como un todo, y por lo tanto debamos incorporar, al menos, nociones de lo que es una comunidad y qué es participación comunitaria para tener idea de cómo fomentarla, única vía para que nuestras acciones de salud sean más efectivasCommunity is one of the most difficult subjects to be taught among those included in the curriculum of General Comprehensive Medicine residents, since bibliography on this topic is a bit dispersed. This aspect, which is not properly evaluated by residents, is very important for health professionals to do our work of promotion, prevention and treatment not only at the level of the individual, but also at the level of the family and of the community as a whole. Therefore, we need to have some notions about community and community participation to be able to promote them, as the only way to make our health actions more effective

  10. Revisión sistemática del efecto de las advertencias gráficas impresas en los paquetes de cigarrillos sobre el comportamiento de los fumadores

    Joel Monárrez-Espino

    Full Text Available Aplicamos un método estructurado para evaluar si los fumadores activos a los que se les mostraban advertencias gráficas en los paquetes de cigarrillos tenían una probabilidad mayor de abandonar el hábito, reducir el consumo de cigarrillos o intentar dejar de fumar por comparación con fumadores no expuestos. Seleccionamos 21 artículos de entre casi 2500 publicados entre 1993 y 2013, dando prioridad a la cobertura sobre la pertinencia o la calidad porque preveíamos encontrar muy pocos estudios con resultados comportamentales. Observamos una heterogeneidad muy grande entre los estudios, una calidad metodológica deficiente o muy deficiente y resultados por lo general nulos o contradictorios con respecto a cualquier desenlace explorado. Los datos científicos a favor o en contra del uso de las advertencias gráficas son insuficientes, lo cual hace sospechar que cualquier efecto de estas sobre el comportamiento sería moderado. La determinación del efecto individual de las advertencias gráficas sobre el comportamiento requiere de estudios con diseños metodológicos sólidos y períodos de seguimiento más largos.

  11. Comparison of vegetation roughness descriptions

    Augustijn, Dionysius C.M.; Huthoff, Freek; van Velzen, E.H.; Altinakar, M.S.; Kokpinar, M.A.; Aydin, I.; Cokgor, S.; Kirkgoz, S.

    2008-01-01

    Vegetation roughness is an important parameter in describing flow through river systems. Vegetation impedes the flow, which affects the stage-discharge curve and may increase flood risks. Roughness is often used as a calibration parameter in river models, however when vegetation is allowed to

  12. Heterogeneidade de variâncias na avaliação genética de búfalas no Brasil Heterogeneity of variances on genetic evaluation of buffaloes in Brazil

    Antonia Kécya França Moita

    2010-07-01

    Full Text Available Registros de produção de leite de 754 búfalas da raça Murrah foram utilizados com o objetivo de avaliar o efeito da heterogeneidade de variâncias na avaliação genética. Os componentes de covariância foram estimados pelo método da máxima verossimilhança restrita utilizando-se quatro modelos bicaracterísticos, considerando, como efeitos fixos, estação de parto e rebanho-ano de parto, e idade da vaca como covariável (efeito linear e quadrático. Os quatro modelos utilizados foram: modelo aditivo; modelo de repetibilidade; modelo aditivo com inclusão interação reprodutor x rebanho-ano; modelo de repetibilidade com inclusão da interação reprodutor x rebanho-ano. Os rebanhos foram classificados em duas classes de desvio-padrão fenotípico para produção de leite e análises bicaracterísticas foram realizadas considerando cada classe de desvio-padrão como característica diferente. Foi conduzida também uma análise unicaracterística desconsiderando as classes de desvio-padrão fenotípico, incluindo o efeito da interação reprodutor x rebanho-ano. As estimativas de componentes de variância genética aditiva foram maiores na classe de alto desvio-padrão, comparadas às de baixo desvio-padrão. A maioria dos animais selecionados nos arquivos sem estratificação foi selecionada para alto desvio-padrão. Apesar do aumento nas variâncias aditivas e do erro nas de classes de alto desvio-padrão, suas herdabilidades foram menores, com exceção do modelo 2, cujo herdabilidade foi maior para a classe de alto desvio-padrão. Quando rebanhos são classificados em alto e baixo desvio-padrão fenotípico e a produção de leite nas diferentes classes é avaliada em modelo multicaracterística, a avaliação genética considera a heterogeneidade de variâncias entre rebanhos.Milk yield records of 754 Murrah female buffaloes were used to evaluate the effects of heterogeneity of variance among herds on genetic evaluation. The

  13. Repetir a palavra alheia, ou De como refletir sobre esse sintoma na companhia da psicanálise

    Ruth Palladino

    Full Text Available Repetir a palavra alheia, ao lado do silêncio, é um dos sintomas mais freqüentes nas patologias da linguagem. Tradicionalmente denominada ecolalia, esta repetição é entendida como produção não intencional, inconsciente, que não é representativa de conhecimento objetivo da realidade. É apenas eco: uma fala que para nada serve. Desde uma perspectiva lingüística mais moderna, que toma a palavra como algo da instância discursiva (que aposta na polissemia da palavra e na heterogeneidade do sujeito, a repetição pode ter uma outra interpretação. Do interior do conceito de enunciação advém a idéia de incompletude do sujeito e da linguagem, determinando para a linguagem uma gênese que nada mais é senão o brotamento de um funcionamento do tipo simbólico em que a repetição fica como um acontecimento fundante. Resgatada por esta lingüística, a repetição permanece, entretanto, exigindo análise. A patologia de linguagem mostra uma repetição cujo destino é diferente: longe de notar uma ocorrência fundante, ela revela seu perverso poder, já que tira da palavra sua possibilidade em advir um dizer. Esta ocorrência passa a ter outra natureza e sobre isto a psicanálise tem muito a dizer. A repetição, ocorrência fundante, perde seu caráter original e significa o patológico. Fica exorbitado o lado conservador das pulsões, esfumaçando a heterogeneidade do sujeito, interditando qualquer anarquia no funcionamento pulsional, fonte da diferença necessária. A palavra é uma invenção: pelo seu caráter polissêmico ela é sempre uma solução inédita. Quando a criança repete a palavra do outro é como se ela a fizesse sua, instaurando a diferença. Na patologia, diversamente, a criança não faz sua a palavra alheia e, assim, deixa de ser uma invenção porque fica destituída da possibilidade de instaurar o novo. Acaba a dialética condicional entre invenção/repetição, daí a morte da palavra.

  14. Desenvolvimento vegetativo, produção e qualidade dos frutos da laranjeira ‘Folha Murcha' sobre seis porta-enxertos no Norte do Paraná Vegetative growth, yield and quality fruits of the ‘Folha Murcha' orange on six rootstocks in North Parana, Brazil

    Neusa Maria Colauto Stenzel

    2005-12-01

    Full Text Available Esta pesquisa avaliou em Londrina, PR, plantas de laranjeira ‘Folha Murcha' sobre os porta-enxertos: laranjeira ‘Caipira' (Citrus sinensis (L. Osb., limoeiro ‘Cravo' (Citrus limonia Osb., tangerineira ‘Sunki' (Citrus sunki Hort. ex Tan., limoeiro ‘Rugoso da Flórida (Citrus jambhiri Lush., tangerineira ‘Cleópatra' (Citrus reshni Hort. ex Tan. e limoeiro ‘Volcameriano' (Citrus volkameriana Ten. e Pasq.. O delineamento experimental utilizado foi o de blocos ao acaso, seis porta-enxertos como tratamentos, cinco repetições e duas plantas por parcela. A altura, diâmetro e volume da copa foram significativamente superiores em plantas enxertadas em laranjeira ‘Caipira', quando comparadas com aquelas em limoeiro ‘Volcameriano'. A menor diferença entre os diâmetros dos troncos abaixo/acima da enxertia ocorreu nas plantas em limoeiro ‘Cravo' e tangerineira ‘Sunki'. A produção acumulada foi superior nas plantas sobre limoeiro 'Cravo'e laranjeira ‘Caipira', sem mostrar significância estatística entre si, porém significativamente diferentes daquelas sobre tangerineira ‘Cleópatra' e limoeiro ‘Volcameriano'. A eficiência da produção não foi influenciada pelos porta-enxertos estudados. O peso do fruto foi significativamente maior para as plantas em tangerineira ‘Sunki', em comparação àqueles sobre limoeiros ‘Cravo', limoeiro ‘Rugoso da Flórida' e limoeiro ‘Volcameriano. Os sólidos solúveis totais (SST apresentaram teores elevados nos frutos de laranjeiras ‘Folha Murcha' sobre limoeiro ‘Volcameriano' e limoeiro 'Cravo', sem diferirem entre si. A acidez titulável total (ATT, o ratio (SST/ATT e a cor do suco não foram influenciados pelos porta-enxertos testados. Os limões 'Cravo'e ‘Volcameriano' proporcionaram valores de índice tecnológico significativamente maiores em relação aos porta-enxertos restantes. Os parâmetros de qualidade de suco avaliados estão dentro de padrões aceitáveis para

  15. Informe preliminar sobre paludrina

    Aquiles Peñuela Rozo

    1948-05-01

    Full Text Available En el año de 1945, Curd Davey y Rose eligieron la pirimidina como substancia de experimentación debido a que esta substancia se encuentra en las nucleo-proteinas y por su presencia en algunas sulfadrogas especial mente la sulfadiazina, de conocidas propiedades anti-palúdicas. Ensayaron la pirimidina y derivados en infestaciones por plasmodium gallinaceum en gallinas; y comprobaron que estas substancias tenían realmente acción antipalúdica. Pero al trasladar sus experiencias al hombre, encontraron que la pirimidina y sus derivados eran demasiado tóxicos. Pensando, entonces, en la similitud química del grupo de la pirimida y de la guanidina, incluyeron este último grupo en los compuestos para ensayar, descubriendo que la inclusión de la guanidina aumentaba grandemente la acción de las substancias en experiencia. Se obtuvo de esta manera un producto denominado en el numero 4-888, o paludrina, cuya fórmula o nombre químico es N. P. clorofenil N5 isopropildiguanidina, droga que se encontró muy activa contra las formas sanguíneas del Plasmodium Gallinaceum y que también se hallo activa contra las formas exoeritrocíticas del parásito. Esta capacidad de obrar sobre la fase exoeritrocítica es prácticamente exclusiva de esta substancia. Hasta hace poco tiempo esta fase exoeritrocítica, había sido demostrada solamente en trabajos de experimentación en las  aves; pero en la actualidad ha quedado también demostrada en la enfermedad humana, por experiencias del Filipino Nolasco and África, quien logro demostrar el plasmodium Vivax en el tejido retículo endotelial del pulmón de enfermos de paludismo, aunque ya Brug, en el año de 1940 había hecho comunicaciones en el mismo sentido. Se comprende la grande importancia de la paludrina, en el tratamiento del paludismo; si se considera que las recidivas de la enfermedad son debidas a la existencia de esta fase xeoeritrocítica.

  16. Efeitos de borda sobre a vegetação e estruturação populacional em fragmentos de Cerradão no Sudoeste Goiano, Brasil Edge effects on vegetation and population structure in Cerradão fragments of Southwest Goiás, Brazil

    Matheus de Souza Lima-Ribeiro

    2008-06-01

    Full Text Available Efeitos de borda são modificações nos parâmetros físicos, químicos e biológicos observadas na área de contato do fragmento de vegetação com a matriz circundante. O objetivo desse estudo foi testar a hipótese de que os efeitos de borda afetam alguns parâmetros vegetacionais e populacional em fragmentos de Cerradão no município de Caiapônia, Goiás. Para isso, estudou-se a estrutura da vegetação, o padrão de distribuição espacial de Vernonia aurea Mart. ex DC. (Asteraceae e as condições microclimáticas (temperatura do ar e do solo e umidade relativa do ar em dois ambientes, borda e interior, de três fragmentos de Cerradão com diferentes tamanhos (1,5 ha; 9 ha e 35 ha. Os resultados mostraram uma nítida influência dos efeitos de borda em todos os parâmetros analisados, uma vez que a estrutura da vegetação, o nível de agregação dos indivíduos de V. aurea e os parâmetros microclimáticos foram diferentes entre o interior e a borda dos fragmentos analisados. Esses dados corroboram com outros estudos realizados em diferentes ecossistemas, indicando que a fragmentação dos habitats modifica a composição e estrutura da vegetação, a estrutura espacial e a dinâmica das populações vegetais e, conseqüentemente, animais, podendo levar à extinção de populações locais e redução da diversidade biológica.Edge effects are modifications in the physical, chemical and biological parameters observed in areas of contact of forest fragment with the surrounding environment. This paper aimed to test the hypothesis that the edge effects influence some vegetation and population parameters in Cerradão fragments in Caiapônia County, Goiás. To this effect, vegetation structure, Vernonia aurea Mart. ex DC. (Asteraceae spatial distribution and microclimate conditions (air and soil temperature and air humidity were analyzed in two habitats, edge and interior, of three Cerradão fragments with different areas (1.5 ha, 9 ha

  17. Efeito de queimadas sobre a estrutura e composição da comunidade vegetal lenhosa do cerrado sentido restrito em Caldas Novas, GO Effect of fire on the structure and floristic composition of a cerrado sensu stricto area in Caldas Novas, GO

    Sérgio de Faria Lopes

    2009-08-01

    Full Text Available Considerando que o regime de queima é um dos principais fatores que alteram a estrutura e composição de espécies de uma comunidade vegetal, este trabalho teve como objetivo analisar o efeito do fogo na composição florística e estrutura da vegetação lenhosa de Cerrado sentido restrito no Parque Estadual da Serra de Caldas Novas (PESCAN, Goiás, submetida a diferentes regimes de queima. Foram utilizadas duas áreas de Cerrado sentido restrito: uma delas submetida ao fogo em 2002 e 2006 e outra sem a passagem do fogo nessas duas épocas. Em cada área foram estabelecidas 25 parcelas de 20 x 20 m, sendo incluídas no estudo todas as árvores (C30>15 cm. As duas áreas estudadas apresentaram composição florística similar, evidenciada pelo Coeficiente de Sorensen, o qual encontrou 84% de similaridade na composição florística entre as áreas. Entretanto, a estrutura da vegetação apresentou diferenças relevantes, evidenciada pelo Indice de Similaridade de Bray Curtis, o qual obteve valor de 0,67, que foi refletido por mudanças na estrutura das comunidades estudadas. A área queimada apresentou menor número de indivíduos, de espécies, menor valor de área basal e, por conseguinte, do Índice de Diversidade de Shannon (H' e Equabilidade (J'. Nesse sentido, provavelmente a frequência das queimadas ocorridas na área não foram suficientes para evidenciar o efeito do fogo no processo de alteração na composição das espécies lenhosas. Entretanto, o fogo exerceu papel relevante na modificação da estrutura da vegetação.Considering that the regimes of burning modify important factors of the structure and composition of the species of a plant community, the objective of this work was to analyze the effect of burning on the floristic composition and structure of the wood vegetation of the cerrado sensu stricto at the Parque Estadual da Serra de Caldas Novas (PESCAN, Goiás, submitted to different times of burning. Two areas had been

  18. CONSIDERACIONES SOBRE LAS ALGAS DEL VALLE DE TEHUACÁN-CUICATLÁN

    Eberto Novelo

    2012-01-01

    Full Text Available El Valle de Tehuacán-Cuicatlán es una zona semiárida que presenta una flora de algas rica en los cuerpos de agua temporales y permanentes, consta de 357 especies, muchas de ellas no registradas previamente en México: 183 especies de Bacillariophyta representan cerca del 50 % de la flora; 81 especies de Cyanoprokaryota constituyen el 22 % de la misma, 77 especies de Chlorophyta aportan el 20 % de la riqueza; complementan la flora 10 especies de Euglenophyta (2.8 %, 5 especies de Heterokontophyta (1.4 % y una especie de Rhodophyta (0.2 %. Las especies más frecuentes y más ampliamente distribuidas son en su mayoría alcalífilas y eurihalobias. Sin embargo, la mayoría de las especies se distribuyen principalmente en una o dos localidades y en dos tipos de ambientes (canales de riego y charcos. Se discute sobre la heterogeneidad de la composición tomando en cuenta la frecuencia de aparición en las muestras y en las cuatro zonas del Valle y el significado de esa distribución. El análisis de distribución y dominancia de las especies sugiere que las condiciones acuáticas del Valle son muy cambiantes y ello promueve la proliferación de especies de un espectro ecológico amplio, dentro de los límites generales de alcalinidad y salinidad moderadas.

  19. Phenolation of vegetable oils

    ZORAN S. PETROVIĆ

    2011-04-01

    Full Text Available Novel bio-based compounds containing phenols suitable for the syn­thesis of polyurethanes were prepared. The direct alkylation of phenols with different vegetable oils in the presence of superacids (HBF4, triflic acid as ca­talysts was studied. The reaction kinetics was followed by monitoring the de­crease of the double bond content (iodine value with time. In order to under­stand the mechanism of the reaction, phenol was alkylated with model com­pounds. The model compounds containing one internal double bond were 9-oc­tadecene and methyl oleate and those with three double bonds were triolein and high oleic safflower oil (82 % oleic acid. It was shown that the best structures for phenol alkylation are fatty acids with only one double bond (oleic acid. Fatty acids with two double bonds (linoleic acid and three double bonds (lino­lenic acid lead to polymerized oils by a Diels–Alder reaction, and to a lesser extent to phenol alkylated products. The reaction product of direct alkylation of phenol with vegetable oils is a complex mixture of phenol alkylated with poly­merized oil (30–60 %, phenyl esters formed by transesterification of phenol with triglyceride ester bonds (<10 % and unreacted oil (30 %. The phenolated vegetable oils are new aromatic–aliphatic bio-based raw materials suitable for the preparation of polyols (by propoxylation, ethoxylation, Mannich reactions for the preparation of polyurethanes, as intermediates for phenolic resins or as bio-based antioxidants.

  20. Ensaios sobre economia do empreendorismo

    Gabrielito Rauter Menezes

    2015-01-01

    Esta tese é composta por três ensaios sobre Economia do Empreendedorismo. O primeiro deles trata sobre os determinantes do empreendedorismo no Brasil a partir de modelos de escolha ocupacional, usando os microdados da Pesquisa Nacional por Amostra por Domicílios (PNAD) do ano de 2012. A estratégia empírica adotada empregou os modelos de escolha discreta na estimação da escolha ocupacional. Os resultados demonstraram que existem efeitos significativos para as variáveis: anos de estudos iniciai...

  1. Effects of metals on vegetation

    Press, N P

    1972-01-01

    Prospectors have long known that abnormal concentrations of metals in the soil overlying an ore deposit can affect the vegetation rooting in this soil; mineral deposits have even been discovered because of such vegetation changes. Recently, many people have become interested in the possibility of remote sensing such vegetation changes, and perhaps using the results in conjunction with airborne geophysics and photogeological interpretation in integrated prospecting programs.

  2. Vegetation and acidification, Chapter 5

    David R. DeWalle; James N. Kochenderfer; Mary Beth Adams; Gary W. Miller

    2006-01-01

    In this chapter, the impact of watershed acidification treatments on WS3 at the Fernow Experimental Forest (FEF) and at WS9 on vegetation is presented and summarized in a comprehensive way for the first time. WS7 is used as a vegetative reference basin for WS3, while untreated plots within WS9 are used as a vegetative reference for WS9. Bioindicators of acidification...

  3. Conversaciones sobre el litoral cordillerano

    Browne,Enrique; Browne,Tomás

    2009-01-01

    Dos arquitectos dialogan sobre los Andes desde su propia vivencia. El territorio de Chile se entiende como límite natural entre mar y cordillera, donde suceden apretadamente una serie de eventos particulares: fallas geológicas, cerros que penetran en las ciudades y torrentes que bajan al mar caracterizan y diferencian sus paisajes.

  4. Relishes: The new pickled vegetables

    Tepić Aleksandra N.

    2006-01-01

    Full Text Available There have been an increasing interest of consumers for a ide variety of pickled vegetable products worldwide. Regarding the regional vegetable supplies and relatively poor assortment of ready-to-use products, the need to broaden the offer of domestic pickled vegetables at the market came out. In this work recipes for different vegetables, spices and condiments were developed. The best graded samples were analyzed for their main chemical composition (dry matter, proteins, oils and fats, total acidity, total sugars, sucrose, starch, cellulose, pH and energy- values.

  5. Crestridge Vegetation Map [ds211

    California Natural Resource Agency — This layer represents vegetation communities in the Department of Fish and Game's Crestridge Ecological Reserve. The County of San Diego, the Conservation Biology...

  6. Encouraging children to eat vegetables

    Buh, Alenka

    2014-01-01

    It is important for children to maintain a healthy and balanced diet throughout their childhood and youth. Children tend to skip vegetables in their meals as they are not much liked; the tastes of vegetables are also highly specific and each individual has to get used to them by repeated tasting. The aim of this undergraduate thesis was to analyse how often children eat vegetables, which types of vegetables they like and which they do not, to determine if the executed method of pedagogica...

  7. Sobre Humanismo y Medicina

    Adolfo de Francisco Zea

    2000-12-01

    Full Text Available

    En esta disertación sobre “Humanismo y Medicina”, título del libro que tuve ocasión de publicar hace un par de años, destacaré algunas de las relaciones que existen entre la medicina y las bellas artes, concretamente la música y la pintura. La Medicina tiene como objeto de su acción al Hombre. Definida como la ciencia y el arte de prevenir, curar o aliviar la enfermedad, no tiene como meta la simple prolongación de la vida biológica.

    Su tarea consiste en postergar la muerte, prevenir o reducir los padecimientos y las deformidades, curar las enfermedades, ampliar las capacidades biológicas y psicológicas de los seres humanos y ocuparse de los sufrimientos de las personas. Para Tristam Engelhardt, es la Medicina de las personas.

    Se concibe a la persona humana como el individuo de conciencia reflexiva normal que es a la vez miembro pleno de la comunidad, con los deberes y derechos que presuponen su pertenencia a ella. A esta acepción de carácter moral de la persona humana, que corresponde a lo que se llama persona “en sentido estricto”, se agrega la acepción social, que hace relación con aquellas personas a las que se otorgan prácticamente los mismos derechos, como es el caso de los niños, de los individuos que perdieron el carácter de personas por padecer de lesiones cerebrales o demencia, y de aquellos que nunca llegarán a serlo como los retrasados mentales profundos.

    Al sostener que no todos los seres humanos son personas “en sentido estricto”, la Bioética que expone Engelhardt impone, sin embargo, como obligación moral, tratar a estos últimos con pleno respeto y comprensión. Lo que es importante acerca de nosotros mismos como seres humanos, es el hecho real de que seamos personas; no simplemente nuestra pertenencia al género Horno sapiens como tal.

    Para Víctor Frankl, la persona humana es de carácter espiritual y en tal virtud, es diferente del organismo psicofísico cuya

  8. Efeito dos óleos vegetais de andiroba (Carapa sp. e Copaíba (Copaifera sp. sobre forídeo, pragas de colméias, (Diptera: Phoridae na Amazônia Central Effect of andiroba (Carapa sp. and copaiba's (Copaifera sp. vegetable oils on phorides, hives's prague (Diptera: Phoridae in Central Amazonia

    Delci da Costa Brito Freire

    2006-01-01

    Full Text Available O conhecimento de substâncias repelentes para forídeos é um passo importante para a meliponicultura brasileira, pois esses insetos podem causar sérios danos às colméias de abelhas nativas. Os óleos de copaíba e andiroba, naturalmente encontrados na região amazônica, são muito utilizados pelos povos tradicionais da região como repelentes de insetos. Foi observado o efeito de dois óleos vegetais (andiroba e copaíba sobre a postura de ovos por fêmeas de forídeos em condições de laboratório. A postura das fêmeas foi realizada preferencialmente no substrato pólen e diferiu estatisticamente dos substratos contendo óleo de andiroba ou copaíba, nos quais houve considerável diminuição (até nenhuma postura, e do substrato contendo mel. Esses óleos são uma boa alternativa no controle preventivo e curativo dessa praga em colônias de Meliponineos, devido ao seu efeito repelente, ao baixo custo e disponibilidade na Região Amazônica.The knowlegment of repellants substances to phoride flies is an important step to the Brazilian stinglessbee beekeeping due to the serious damage to the native bee hives they can do. The copaiba and andiroba oils, found commonly in the Amazon region, are very employed by the traditional people as insects' repellants. We observed the effect of these oils over the phoride's laying in laboratory conditions. The female phoride's eggs occurred preferentially in the pollen substrate and statistically differed from those containing andiroba and copaiba oils, which was strongly reduced (until none eggs were laid, and from the substrate containing honey. These oils showed to be quite good alternative for this plague's preventive and curative control in stingless bee hives due to its repellant effect, low cost, and availability to get it in the region.

  9. A vegetal Geiger counter

    Anon.

    1999-01-01

    In order to study the Chernobyl accident impact on ecosystems, Ukrainian and Swiss scientists have used a plant: the Arabidopsis thaliana. They have introduced in its genome a gene coding an enzyme called β-glucuronidase. This substance, when it is expressed, colours vegetal cells blue. In fact the introduced gene is divided between 2 paired chromosomes. When the plant is placed on a nuclear contaminated soil, radiation damaged chromosomes exchange fragments and the 2 parts of the enzyme gene may recombine, the enzyme can then be expressed. For low and medium contamination ( 2 ) biologists have found a correlation between the number of blue spots on the plant and the irradiation rate. (A.C.)

  10. Genetic improvement of vegetables

    Jaramillo Vasquez, J.G.

    2001-01-01

    Some genetic bases of the improvement of vegetables are given. The objectives of the genetic improvement and the fundamental stages of this process are done. The sources of genetic variation are indicated and they are related the reproduction systems of the main horticultural species. It is analyzed the concept of genetic inheritance like base to determine the procedures more appropriate of improvement. The approaches are discussed, has more than enough phenotypic value, genetic action and genotypic variance; Equally the heredability concepts and value of improvement. The conventional methods of improvement are described, like they are: the introduction of species or varieties, the selection, the pure line, the pedigree method, the selection for families, the recurrent selection, the selection for unique seed, the haploids method, the selection for heterosis and the synthetic varieties

  11. Fruits and vegetables dehydration

    De Ita, A; Flores, G; Franco, F

    2015-01-01

    Dehydration diagrams were determined by means of Differential Thermal Analysis, DTA, and Thermo Gravimetric Analysis, TGA, curves of several simultaneous fruits and vegetables, all under the same conditions. The greater mass loss is associated with water containing in the structure of the investigated materials at low temperature. In poblano chile water is lost in a single step. The banana shows a very sharply two stages, while jicama can be observed although with a little difficulty three stages. The major mass loss occurs in the poblano chile and the lower in banana. The velocity and temperature of dehydration vary within a small range for most materials investigated, except for banana and cactus how are very different

  12. Fruits and vegetables dehydration

    de Ita, A.; Flores, G.; Franco, F.

    2015-01-01

    Dehydration diagrams were determined by means of Differential Thermal Analysis, DTA, and Thermo Gravimetric Analysis, TGA, curves of several simultaneous fruits and vegetables, all under the same conditions. The greater mass loss is associated with water containing in the structure of the investigated materials at low temperature. In poblano chile water is lost in a single step. The banana shows a very sharply two stages, while jicama can be observed although with a little difficulty three stages. The major mass loss occurs in the poblano chile and the lower in banana. The velocity and temperature of dehydration vary within a small range for most materials investigated, except for banana and cactus how are very different.

  13. Heavy metals in green vegetables and soils from vegetable gardens ...

    Edible portions of five varieties of green vegetables, namely amaranth, chinese cabbage, cowpea leaves, leafy cabbage and pumpkin leaves, collected from several areas in Dar es Salaam, were analyzed for lead, cadmium, chromium, zinc, nickel and copper. Except for zinc, the levels of heavy metals in the vegetables ...

  14. EXTRATO DE CHÁ VERDE (Camellia sinensis PROMOVE AÇÃO ANTIMICROBIANA SOBRE Staphylococcus aureus

    Leandro Wagner Figueira

    2017-01-01

    Full Text Available É de grande importância ampliar as pesquisas científicas com plantas medicinais sobre micro-organismos. Foi verificado o efeito antimicrobiano do extrato de C. sinensis , sobre cultura planctônica e biofilme de S. aureus. Neste estudo foi verificada ação do extrato entre 50 a 0,09 mg/mL sobre cultura planctônica, para determinação da CIM e CBM. A ação do extrato sobre biofilme foi analisada pela exposição de 5 min ao produto vegetal a 200mg/mL. Foi utilizado o método de MTT para determinar a redução da viabilidade do biofilme. Nos grupos controles foram utilizadas clorexidina (+ e solução salina (-, sendo n = 12/grupo. A redução do biofilme foi analisada por ANOVA e Tukey Test (p ≤ 0,05. Em cultura planctônica as concentrações avaliadas não foram efetivas, contudo, utilizando-se a concentração de 200 mg/mL sobre o biofilme, foi verificada redução significativa. Com isso, concluiu-se que o extrato de chá verde demonstrou ação sobre biofilme de S. aureus provendo redução significativa em sua viabilidade.

  15. Vegetable Genetic Resources in China

    Haiping WANG

    2018-03-01

    Full Text Available China is recognized as an important region for plant biodiversity based on its vast and historical collection of vegetable germplasm. The aim of this review is to describe the exploration status of vegetable genetic resources in China, including their collection, preservation, evaluation, and utilization. China has established a number of national-level vegetable genetic resources preservation units, including the National Mid-term Genebank for Vegetable Germplasm Resources, the National Germplasm Repository for Vegetatively-Propagated Vegetables, and the National Germplasm Repository for Aquatic Vegetables. In 2015, at least 36 000 accessions were collected and preserved in these units. In the past decade, 44 descriptors and data standards for different species have been published, and most accessions have been evaluated for screening the germplasms for specific important traits such as morphological characteristics, disease resistance, pest resistance, and stress tolerance. Moreover, the genetic diversity and evolution of some vegetable germplasms have been evaluated at the molecular level. Recently, more than 1 000 accessions were distributed to researchers and breeders each year by various means for vegetable research and production. However, additional wild-relative and abroad germplasms from other regions need to be collected and preserved in the units to expand genetic diversity. Furthermore, there is a need to utilize advanced techniques to better understand the background and genetic diversity of a wide range of vegetable genetic resources. This review will provide agricultural scientists’ insights into the genetic diversity in China and provide information on the distribution and potential utilization of these valuable genetic resources. Keywords: vegetable, genetic resource, preservation, evaluation, utilization

  16. Toxicología Vegetal

    García Fernández, Antonio Juan

    2010-01-01

    Presentaciones de clase de los temas de Toxicología Vegetal de la licenciatura de Veterinaria de la Universidad de Murcia del curso 2011/12. Presentaciones de Toxicología Vegetal de la asignatura de Toxicología de la Licenciatura de Veterinaria del curso 2011/12

  17. Importance of water quality on plant abundance and diversity in high-alpine meadows of the Yerba Loca Natural Sanctuary at the Andes of north-central Chile Importancia de la calidad del agua sobre la abundancia y diversidad vegetal en vegas altoandinas del Santuario Natural Yerba Loca en los Andes de Chile centro-norte

    ROSANNA GINOCCHIO

    2008-12-01

    Full Text Available Porphyry Cu-Mo deposits have influenced surface water quality in high-Andes of north-central Chile since the Miocene. Water anomalies may reduce species abundance and diversity in alpine meadows as acidic and metal-rich waters are highly toxic to plants The study assessed the importance of surface water quality on plant abundance and diversity in high-alpine meadows at the Yerba Loca Natural Santuary (YLNS, central Chile (33°15' S, 70°18' W. Hydrochemical and plant prospecting were carried out on Piedra Carvajal, Chorrillos del Plomo and La Lata meadows the growing seasons of 2006 and 2007. Direct gradient analysis was performed through canonical correspondence analysis (CCA to look for relationships among water chemistry and plant factors. High variability in water chemistry was found inside and among meadows, particularly for pH, sulphate, electric conductivity, hardness, and total dissolved Cu, Zn, Cd, Pb and Fe. Data on species abundance and water chemical factors suggests that pH and total dissolved Cu are very important factor determining changes in plant abundance and diversity in study meadows. For instance, Festuca purpurascens, Colobanthus quitensis, and Arenaria rivularis are abundant in habitals with Cu-rich waters while Festuca magellanica, Patosia clandestina, Plantago barbata, Werneria pygmea, and Erigeron andícola are abundant in habitals with dilute waters.Los megadepósitos de pórfidos de Cu-Mo han influido sobre la calidad de las aguas superficiales en las zonas altoandinas del centro-norte de Chile desde el Mioceno. Estas alteraciones en la calidad de las aguas podrían afectar negativamente a la vegetación presente en las vegas altoandinas, ya que las aguas acidas y ricas en metales son altamente tóxicas para las plantas. En este estudio se evaluó el efecto de la calidad de las aguas en la abundancia y diversidad florística de las vegas altoandinas del Santuario de la Naturaleza Yerba Loca (SNYL, en Chile central (33

  18. Heterogeneidades y condiciones de trabajo de los docentes universitarios en la Universidad de Buenos Aires: Un estudio comparado de las Facultades de Farmacia y Bioquímica, y Ciencias Económicas

    RIKAP, Cecilia

    2016-01-01

    El presente artículo analiza las condiciones de trabajo de la docencia universitaria de grado a partir del caso de la Universidad de Buenos Aires (UBA). En particular, se profundizará sobre las facultades de Farmacia y Bioquímica (FFyB) y Ciencias Económicas (FCE) en tanto conforman, respectivamente, ejemplos representativos de las tradiciones de investigación y profesional, que conviven en la UBA. Se abordarán las siguientes características: percepción de salario, estabilidad en el empleo, r...

  19. Estructura de la comunidad y asociación de las aves acuáticas con la heterogeneidad espacial del complejo lagunar Bahía Magdalena-Almejas, Baja California Sur, México

    Bulmara Zárate-Ovando

    2008-03-01

    Full Text Available Para probar la hipótesis que la heterogeneidad espacial determina la diversidad de aves acuáticas en un humedal costero, comparamos la densidad, diversidad y composición de especies de aves acuáticas entre habitats y otras unidades de paisaje del complejo Bahía Magdalena-Almejas, Baja California Sur, México. Se realizaron censos de aves acuáticas en 329 segmentos de habitat de la línea de costa interna del complejo lagunar, desde febrero 2002 hasta febrero 2003. La densidad de aves fue mayor en invierno y otoño en las tres lagunas del área de estudio; de las zonas, la densidad fue mayor en la costa insular; y de los habitats en playa arenosa y dunas pero en los pocos segmentos de sustrato antrópico la densidad fue alta. La diversidad fue significativamente mayor en otoño; en Canal Santo Domingo; en la costa peninsular; y de los habitats en manglar-dunas y manglar. La modificación del habitat natural costero y el disturbio por tránsito de embarcaciones no tuvieron influencia en la densidad o diversidad de aves acuáticas, pero la riqueza acumulada mayor ocurrió en las costas bien conservadas y sin disturbio. El análisis de la composición de especies mostró diferencias entre las asociaciones de Canal Santo Domingo y Bahía Magdalena. El ambiente pelágico y el manglar tuvieron diferencia mayor en la composición de especies con respecto a las asociaciones de los demás habitats, tales diferencias en elencos de especies por habitat sugieren que la comunidad de aves está estructurada de acuerdo a los recursos naturales disponibles de las lagunas, zonas y habitats, en relación con la complejidad estructural de las unidades de paisaje. Las condiciones ecológicas del complejo lagunar ocasionan que las aves acuáticas piscívoras sean el grupo dominante de esta comunidad.Community structure and association of waterbirds with spatial heterogeneity in the Bahía Magdalena-Almejas wetland complex, Baja California Sur, Mexico. To test

  20. Construcciones en yeso proyectado sobre vegetales

    Martínez, Hubert

    1986-07-01

    Full Text Available A construction method developed in early 1981 in Senegal, whose main objective is the evaluation of natural and human sources, specially those of wild vegetables and the phosphogypsum (a waste of chemical industry in Senegal. The introduction of the mechanical projection allows a noticeably growth in work performances and an improvement of the quality. The projection reduces de number of trades intervening in the work, doing away with plasters, watertightness systems and paintings, and simplifying the setting of technical installations and of carpentry. The acquisition of this projecting material is not very expensive, so, it is easy for small and medium enterprises to reach an expertness in gypsum work. Its finantial rentability is assured for a prize of the gypsum of 180% of the prize of the cement.Procedimiento de construcción desarrollado al comienzo de 1981 en el Senegal, teniendo como objetivo la valoración de las fuentes naturales y humanas, especialmente los vegetales en estado silvestre y el fosfoyeso, residuo de la industria química del Senegal. La introducción de la proyección mecánica permite aumentar sensiblemente el rendimiento del trabajo y mejorar la calidad. La proyección reduce el número de oficios que intervienen en la obra por la supresión de enlucidos, sistemas de estanquidad y pinturas sobre la gruesa obra y simplifica la colocación de las instalaciones técnicas y de carpintería. La adquisición del material de proyección, necesitando un capital relativamente modesto, se encuentra al alcance de pequeñas y medianas empresas que deseen especializarse en los trabajos de yeso. La rentabilidad financiera del procedimiento está asegurada para un precio del yeso de hasta el 180% del precio del cemento.

  1. Special study on vegetative covers

    1988-11-01

    This report describes the findings of a special study on the use of vegetative covers to stabilize tailings piles for the Uranium Mill Tailings Remedial Action (UMTRA) Project. The principal rationale for using plants would be to establish a dynamic system for controlling water balance. Specifically, vegetation would be used to intercept and transpire precipitation to the atmosphere, rather than allowing water to drain into the tailings and mobilize contaminants. This would facilitate compliance with groundwater standards proposed for the UMTRA Project by the Environmental Protection Agency. The goals of the study were to evaluate the feasibility of using vegetative covers on UMTRA Project piles, define the advantages and disadvantages of vegetative covers, and develop general guidelines for their use when such use seems reasonable. The principal method for the study was to analyze and apply to the UMTRA Project the results of research programs on vegetative covers at other US Department of Energy (DOE) waste management facilities. The study also relied upon observations made of existing stabilized piles at UMTRA Project sites where natural vegetation is growing on the rock-covered surfaces. Water balance and erosion models were also used to quantify the long-term performance of vegetative covers planned for the topslopes of stabilized piles at Grand Junction and Durango, Colorado, two UMTRA Project sites where the decision was made during the course of this special study to use vegetative covers. Elements in the design and construction of the vegetative covers at these two sites are discussed in the report, with explanations of the differing features that reflect differing environmental conditions. 28 refs., 18 figs., 9 tabs

  2. Bioplaguicidas de origen vegetal en Costa Rica.

    Jaime García

    2016-03-01

    Full Text Available El presente artículo cita los nombres, ordenados por su principal acción plaguicida, de poco más de un centenar de plantas con algún tipo de potencial bioplaguicida en Costa Rica. Posteriormente se presenta la situación de la oferta y la demanda actual de estos productos, destacando las principales limitaciones que experimenta su desarrollo comercial, así como el potencial que posee el país en esta materia, basado en su extraordinaria biodiversidad. Además, se hace mención de las entidades involucradas en esta temática. Finalmente se hacen algunas consideraciones adicionales relacionadas con la toxicidad de estos productos y sobre la importancia de los conocimientos etnobotánicos en esta materia. Entre las especies de plantas que más se mencionan en la bibliografía consultada están Allium sativum, Annona reticulata, Azadirachta indica, Capsicum frutescens, Chenopodium Ambrosiodes, Gliricidia sepium, Quassia amara y Ryania speciosa. Se resalta el hecho de que hasta la fecha, tanto su uso artesanal como su desarrollo comercial son mínimos, en relación con el potencial existente en el país. Con excepción de dos productos, los pocos bioplaguicidas de origen vegetal que se comercializan son importados.

  3. Radiation and the vegetable industry

    Roberts, P.B.

    1984-01-01

    The possible uses of irradiation in the vegetable industry are considered. Interest has been increasing because of possible bans on chemical fumigants and clearance of irradiation as an acceptable process, up to certain dose limits, by Codex Alimentarius and the US FDA. Inhibition of sprouting in potatoes and onions would be one possibility for exploitation. However, the main incentive for vegetable irradiation would be as a quarantine treatment for exported products. The shelf-life of a few vegetables could also be increased by combining radiation with heat treatments. Costs in New Zealand and consumer attitudes are briefly considered

  4. Vegetation - McKenzie Preserve [ds703

    California Natural Resource Agency — The California Native Plant Society (CNPS) Vegetation Program produced a vegetation map and classification for approximately 11,600 acres primarily within Millerton...

  5. Vegetation - Lassen Foothills [ds564

    California Natural Resource Agency — In 2007 Aerial Information Systems, Inc. (AIS) was contracted by the California Native Plant Society (CNPS) to produce a vegetation map for approximately 100,000...

  6. in Leafy Vegetable and Pharmaceutical

    Bheema

    successfully employed for the determination of copper (II) in leafy vegetable and pharmaceutical samples. ... Our previous studies of transition metal ions such as zinc, cobalt and ..... A new method for extractive photometric determination of.

  7. Buffers and vegetative filter strips

    Matthew J. Helmers; Thomas M. Isenhart; Michael G. Dosskey; Seth M. Dabney

    2008-01-01

    This chapter describes the use of buffers and vegetative filter strips relative to water quality. In particular, we primarily discuss the herbaceous components of the following NRCS Conservation Practice Standards.

  8. Sobre aprendizaje escolar y neurociencias

    Terigi, Flavia

    2016-01-01

    En el marco de una creciente difusión de los discursos de y sobre las neurociencias en el campo educativo en Argentina, donde enunciados extraídos del discurso neurocientífico comienzan a transformarse en emblemas de política pública, este trabajo, escrito desde el punto de vista de la educación escolar, se propone situar los alcances y límites de los aportes de estas disciplinas para comprender el aprendizaje escolar. En él se postula que la aparición rutilante de las neurociencias en educac...

  9. Polinomios perfectos sobre F2

    Cely Rojas, Valeria

    2010-01-01

    Este trabajo muestra el status de los números perfectos y el análogo de los números perfectos en los anillos de polinomios. Además, se presentan las demostraciones de algunas propiedades de los polinomios perfectos sobre F2 de forma comprensible, basadas en el trabajo realizado por los profesores Luis Gallardo y Oliver Rahavandrainy. / Abstract. This work shows the status artis of perfect numbers and their analogue in the rings of polynomials. Proofs of some properties of perfect polynomials ...

  10. Contabilidad del impuesto sobre beneficios

    Luceño Martínez, Haizea

    2017-01-01

    Este Trabajo Fin de Grado pretende dar una explicación al tratamiento contable del Impuesto de Sociedades. Siendo un impuesto que hay que contabilizar, pero que se calcula siguiendo criterios fiscales, lleva a tener que realizar ajustes que tendrán su repercusión contable. El punto de partida no es otra que la norma de registro y valoración 13ª del PGC, que versa sobre cómo hay que proceder a contabilizar el Gasto por Impuesto de Sociedades, que se compone tanto del Gasto por Impuesto Co...

  11. Pesquisa sobre mortalidade perinatal no Brasil: revisão da metodologia e dos resultados Perinatal mortality research in Brazil: review of methodology and results

    Sandra Costa Fonseca

    2004-01-01

    Full Text Available A mortalidade perinatal persiste como relevante evento em saúde pública, demandando estudos epidemiológicos, tanto para definir sua magnitude e variações temporais, como para identificar seus determinantes e apontar as intervenções adequadas. Existem ainda questões conceituais e metodológicas controversas, gerando heterogeneidade nos estudos e prováveis vieses. No Brasil, nos últimos anos, desponta uma produção crescente sobre o tema, principalmente no Sudeste e Sul. Foram revistos 24 artigos de 1996 a 2003, focalizando: definições e classificações utilizadas, fontes de dados, desenhos de estudo, formas de aferição das variáveis, modelos de análise estatística e principais resultados. A revisão mostrou a progressiva utilização de bancos de dados informatizados, principalmente o SINASC e o SIM, o pequeno número de estudos sobre natimortalidade, a incorporação ainda incipiente das classificações de causas e a discordância em relação a alguns fatores de risco.The perinatal mortality rate remains a public health problem, demanding epidemiological studies to describe its magnitude and time trends, identify risk factors, and define adequate interventions. There are still methodological controversies, resulting in heterogeneous studies and possible biases. In Brazil, there has been a growing scientific output on this theme, mainly in the South and Southeast of the country. Twenty-four articles from 1996 to 2003 were reviewed, focusing on definitions and classifications, data sources, study designs, measurement of variables, statistical analysis, and results. The review showed an increasing utilization of data bases (mainly SINASC and SIM, few studies on stillbirth, the incorporation of classification schemes, and disagreement concerning risk factors.

  12. Handling Procedures of Vegetable Crops

    Perchonok, Michele; French, Stephen J.

    2004-01-01

    The National Aeronautics and Space Administration (NASA) is working towards future long duration manned space flights beyond low earth orbit. The duration of these missions may be as long as 2.5 years and will likely include a stay on a lunar or planetary surface. The primary goal of the Advanced Food System in these long duration exploratory missions is to provide the crew with a palatable, nutritious, and safe food system while minimizing volume, mass, and waste. Vegetable crops can provide the crew with added nutrition and variety. These crops do not require any cooking or food processing prior to consumption. The vegetable crops, unlike prepackaged foods, will provide bright colors, textures (crispy), and fresh aromas. Ten vegetable crops have been identified for possible use in long duration missions. They are lettuce, spinach, carrot, tomato, green onion, radish, bell pepper, strawberries, fresh herbs, and cabbage. Whether these crops are grown on a transit vehicle (e.g., International Space Station) or on the lunar or planetary surface, it will be necessary to determine how to safely handle the vegetables while maintaining acceptability. Since hydrogen peroxide degrades into water and oxygen and is generally recognized as safe (GRAS), hydrogen peroxide has been recommended as the sanitizer. The objective of th is research is to determine the required effective concentration of hydrogen peroxide. In addition, it will be determined whether the use of hydrogen peroxide, although a viable sanitizer, adversely affects the quality of the vegetables. Vegetables will be dipped in 1 % hydrogen peroxide, 3% hydrogen peroxide, or 5% hydrogen peroxide. Treated produce and controls will be stored in plastic bags at 5 C for up to 14 days. Sensory, color, texture, and total plate count will be measured. The effect on several vegetables including lettuce, radish, tomato and strawberries has been completed. Although each vegetable reacts to hydrogen peroxide differently, the

  13. Importancia de la heterogeneidad de hábitats para la biodiversidad de hormigas en los Andes de Colombia Importance of habitat heterogeneity for ant biodiversity in the Colombian Andes

    Mónica Ramírez Ramírez

    2009-04-01

    Full Text Available Entre marzo y octubre de 2002 se compararon los ensamblajes de hormigas que forrajean en el suelo en un sistema no manejado (reserva natural El Ciprés y en algunas fincas vecinas. En dos transectos de 100 m se instalaron estaciones de muestreo cada 10 m con trampa de caída (pitfall y cebo de atún epígeo durante 880 h y 92 días respectivamente. En 1471 eventos de captura se determinaron 68 especies distribuidas en 26 géneros y 8 subfamilias. En el sistema silvopastoril- guayaba y en monocultivo de granadilla (Passiflora ligularis dominaron las especies de hormigas mientras que la distribución fue más equitativa en los usos del terreno con estructura vegetal más compleja (bosque, café, sucesión temprana y banco de forrajes. El sistema silvopastoril-guayaba fue el más rico en especies (31 seguido por café (30 y por el bosque y la sucesión temprana (29. El flujo de especies fue alto en bosque, café y sucesión temprana, indicando que la calidad de la matriz es factor importante para el mantenimiento de la biodiversidad.In order to compare the ant assamblages in the Natural Reserve El Ciprés (Valle- Colombia and its neighboring farms, periodical ant sampling was carried out between March and October 2002. Each site had two transects of 100m with 10 sampling points. Each sampling point contained a pitfall trap and epigeal tuna bait established for 880 h and 92 days, respectively. In addition, the vegetal structure of each place was characterised. A total of 1471 ants were collected representing 68 species in 26 genera and 8 subfamilies. Two agricultural systems, the silvopastoral guava and passion fruit (Passiflora ligularis monoculture, typically presented ant species that over numbered other species whereas sites with more complex vegetation structure (i.e. forest, coffee, early succession and fodder banks had a more equitable distribution for the ant species. In terms of ant richness, the guava system was the richest (31 spp

  14. East African Cenozoic vegetation history.

    Linder, Hans Peter

    2017-11-01

    The modern vegetation of East Africa is a complex mosaic of rainforest patches; small islands of tropic-alpine vegetation; extensive savannas, ranging from almost pure grassland to wooded savannas; thickets; and montane grassland and forest. Here I trace the evolution of these vegetation types through the Cenozoic. Paleogene East Africa was most likely geomorphologically subdued and, as the few Eocene fossil sites suggest, a woodland in a seasonal climate. Woodland rather than rainforest may well have been the regional vegetation. Mountain building started with the Oligocene trap lava flows in Ethiopia, on which rainforest developed, with little evidence of grass and none of montane forests. The uplift of the East African Plateau took place during the middle Miocene. Fossil sites indicate the presence of rainforest, montane forest and thicket, and wooded grassland, often in close juxtaposition, from 17 to 10 Ma. By 10 Ma, marine deposits indicate extensive grassland in the region and isotope analysis indicates that this was a C 3 grassland. In the later Miocene rifting, first of the western Albertine Rift and then of the eastern Gregory Rift, added to the complexity of the environment. The building of the high strato-volcanos during the later Mio-Pliocene added environments suitable for tropic-alpine vegetation. During this time, the C 3 grassland was replaced by C 4 savannas, although overall the extent of grassland was reduced from the mid-Miocene high to the current low level. Lake-level fluctuations during the Quaternary indicate substantial variation in rainfall, presumably as a result of movements in the intertropical convergence zone and the Congo air boundary, but the impact of these fluctuations on the vegetation is still speculative. I argue that, overall, there was an increase in the complexity of East African vegetation complexity during the Neogene, largely as a result of orogeny. The impact of Quaternary climatic fluctuation is still poorly understood

  15. Chapter 3: Status and trends of vegetation

    James M. Guldin; Frank R. Thompson; Lynda L. Richards; Kyra C. Harper

    1999-01-01

    This chapter provides information about the vegetation cover of the Assessment area. The types and areal extent of vegetation in the Highlands are of interest for many reasons. Vegetation cover largely determines the availability of habitat for terrestrial animals, plants, and other organisms. Vegetation cover strongly influences what uses {e.g., timber, forage,...

  16. Vegetables and other core food groups

    Poelman, Astrid A.M.; Delahunty, Conor M.; Graaf, de Kees

    2017-01-01

    Vegetables are the food category least liked by children. This research investigated the sensory properties of vegetables vis-a-vis other core foods that comprise children's diets, to determine to what degree low acceptance of vegetables can be attributed to sensory properties. Vegetables (n =

  17. 18 CFR 1304.203 - Vegetation management.

    2010-04-01

    ... 18 Conservation of Power and Water Resources 2 2010-04-01 2010-04-01 false Vegetation management...-Owned Residential Access Shoreland § 1304.203 Vegetation management. No vegetation management shall be approved on TVA-owned Residential Access Shoreland until a Vegetation Management Plan meeting the...

  18. Mutation breeding in vegetable crops

    Yamaguchi, Takashi

    1984-03-01

    Vegetables breed by seeds and vegetative organs. In main vegetables, the differentiation of clopping types, the adoption of monoculture and year-round production and shipment are carried out, adapting to various socio-economic and cultivation conditions. Protected agriculture has advanced mainly for fruit vegetables, and the seeds for sale have become almost hybrid varieties. Reflecting this situation, the demand for breeding is diversified and characteristic. The present status of mutation breeding of vegetables is not yet well under way, but reports of about 40 raised varieties have been published in the world. The characters introduced by induced mutation and irradiation are compact form, harvesting aptitude, the forms and properties of stems and leaves, anti-lodging property, the size, form and uniformity of fruits, male sterility and so on. The radiation sources used were mostly gamma ray or X-ray, but sometimes, combined irradiation was used. Results obtained in Japan include: burdocks as an example to gamma ray irradiation of seeds; tomatoes as an example of inducing compound resistance against disease injury; and lettuce as an example of internal beta irradiation. (Kako, I.).

  19. Mutation breeding in vegetable crops

    Yamaguchi, Takashi

    1984-01-01

    Vegetables breed by seeds and vegetative organs. In main vegetables, the differentiation of clopping types, the adoption of monoculture and year-round production and shipment are carried out, adapting to various socio-economic and cultivation conditions. Protected agriculture has advanced mainly for fruit vegetables, and the seeds for sale have become almost hybrid varieties. Reflecting the situation like this, the demand for breeding is diversified and characteristic, and the case of applying mutation breeding seems to be many. The present status of the mutation breeding of vegetables is not yet well under way, but about 40 raised varieties have been published in the world. The characters introduced by induced mutation and irradiation were compact form, harvesting aptitude, the forms and properties of stems and leaves, anti-lodging property, the size, form and uniformity of fruits, male sterility and so on. The radiation sources used were mostly gamma ray or X-ray, but sometimes, combined irradiation was used. As the results obtained in Japan, burdocks as an example of gamma ray irradiation to seeds, tomatoes as an example of inducing the compound resistance against disease injury and lettuces as an example of internal beta irradiation are reported. (Kako, I.)

  20. A esquistossomose urbana e a heterogeneidade social e epidemiológica da população do município de Campinas, São Paulo, Brasil

    Virgília L. C. de Lima

    1995-03-01

    Full Text Available Este estudo aborda as relações da esquistossomose com uma das características da urbanização intensa que vem sendo observada nos países de capitalismo tardio, que é a presença de um aglomerado de pessoas, vivendo nas periferias das cidades em precárias condições de vida. Foram estudados 610 casos autóctones notificados da endemia, no município de Campinas (situado a 98km da capital, correspondentes ao período de 1970 a 1990, por meio de suas fichas de notificação epidemiológica, visando avaliar as condições socioeconômicas dos portadores da doença. Constatou-se que a esquistossomose autóctone no município de Campinas apresenta distribuição mais heterogênea do que se poderia esperar com base nos estudos existentes sobre a endemia, em que ela é intimamente relacionada a condições precárias de saneamento básico e subsistência.

  1. A esquistossomose urbana e a heterogeneidade social e epidemiológica da população do município de Campinas, São Paulo, Brasil

    Lima Virgília L. C. de

    1995-01-01

    Full Text Available Este estudo aborda as relações da esquistossomose com uma das características da urbanização intensa que vem sendo observada nos países de capitalismo tardio, que é a presença de um aglomerado de pessoas, vivendo nas periferias das cidades em precárias condições de vida. Foram estudados 610 casos autóctones notificados da endemia, no município de Campinas (situado a 98km da capital, correspondentes ao período de 1970 a 1990, por meio de suas fichas de notificação epidemiológica, visando avaliar as condições socioeconômicas dos portadores da doença. Constatou-se que a esquistossomose autóctone no município de Campinas apresenta distribuição mais heterogênea do que se poderia esperar com base nos estudos existentes sobre a endemia, em que ela é intimamente relacionada a condições precárias de saneamento básico e subsistência.

  2. Temporal reflectance changes in vegetables

    Dissing, Bjørn Skovlund; Clemmensen, Line Katrine Harder; Ersbøll, Bjarne Kjær

    2009-01-01

    Quality control in the food industry is often performed by measuring various chemical compounds of the food involved. We propose an imaging concept for acquiring high quality multispectral images to evaluate changes of carrots and celeriac over a period of 14 days. Properties originating...... in the surface chemistry of vegetables may be captured in an integrating sphere illumination which enables the creation of detailed surface chemistry maps with a good combination of spectral and spatial resolutions. Prior to multispectral image recording, the vegetables were prefried and frozen at -30Â......°C for four months. During the 14 days of image recording, the vegetables were kept at +5°C in refrigeration. In this period, surface changes and thereby reflectance properties were very subtle. To describe this small variation we employed advanced statistical techniques to search a large featurespace...

  3. ROOT VEGETABLES, BREEDING TRENDS, RESULTS

    M. I. Fedorova

    2017-01-01

    Full Text Available The main advantage of root vegetables is their unique specificity and high economic importance. The benefits and medicinal properties of root vegetables being highly demanded by the market requirements to the commodity are highlighted in the article. The main directions of breeding program for root vegetable crops, including species of Apiaceae family with carrot, parsnips; Chenopodioideae family with red beet; Brassicaceae family with radish, Daikon, Raphanus sativus L. var. lobo Sazonova & Stank, turnip and rutabaga. Initial breeding accessions of carrot, red beet, radish, Daikon, Raphanus sativus L. var. lobo Sazonova & Stank, turnip and rutabaga have been selected out to be used for breeding program for heterosis. The mf and ms breeding lines were developed, and with the use of them the new gene pool was created. Variety supporting breeding program and methods were also proposed. 

  4. Recursos y enlaces sobre comunidades de aprendizaje

    Ferrer Esteban, Gerard

    2005-01-01

    Obras y artículos sobre el proyecto Comunidades de Aprendizaje desarrollado en el Estado español. Tesis doctorales sobre comunidades de aprendizaje. Fundamentación teórica de las comunidades de aprendizaje. Sitios en Internet relacionados con las comunidades de aprendizaje y proyectos afines de desarrollo comunitario en contextos escolares.

  5. Efecto cristal. Reflexiones sobre arquitectura

    Dr. Arq. Carlos Pantaleón Panaro

    2017-12-01

    Full Text Available ESPEJISMO es una ilusión óptica debido a la reflexión total de la luz cuando atraviesa capas de aire de densidad distinta, con lo cual los objetos lejanos dan una imagen invertida, como si se reflejaran sobre el agua, tal como ocurre en las llanuras de los desiertos. 1 La definición de espejismo nos explica que es una ilusión, una ficción, un desvarío, un delirio. Algo que no es real ni verdadero, la apariencia engañosa de algo que no existe. ¿Pero no existe, realmente? Tal vez se pueda decir, desde algún punto de vista, que una imagen ilusoria no es real. Pero ¿podríamos afirmarlo desde el punto de vista del fenómeno de la percepción? Si lo vemos, ¿no tendríamos derecho a decir que es real? ¿Algo tiene que ser material y poder tocarse, para ser real? ¿No basta simplemente con verlo? Este artículo de reflexión trata sobre el tema de lo ilusorio, de los espejismos y apariencias engañosas que, no obstante su naturaleza falaz, existen y se perciben, y son procesados por nuestra mente como fenómenos sensoriales que conforman nuestra percepción. El hilo conductor es un viaje a través de diferentes paisajes espejados: el del azar, el de las artes y el de la arquitectura. 1Diccionario de la Real Academia Española

  6. Local vegetables in Cameroon: Corchorus species used as a vegetable.

    Westphal-Stevels, J.M.C.

    1986-01-01

    An agro-botanical study of local vegetables in Cameroon is in preparation, including the taxonomy, identity, morphology, agronomy and nutritional value of about 70 species. Corchorus olitorius L. and other edible species of the genus Corchorus L. (Tiliaceae) are part of this study. The wide

  7. Vegetables, Coctails & Reflections / Marco Laimre

    Laimre, Marko, 1968-

    2006-01-01

    Pealkirja "Vegetables, Coctails & Reflections" kandis Tallinna Kunstihoones 8.04.-28.05.2006 avatud Elin Kardi, Marko Mäetamme, Marco Laimre ja Andres Tali ühisnäitusel "Vägivald ja propaganda" Marco Laimre installatsioon. Marco Laimre esinemine raadiosaates "kunst.er" Klassikaraadios 16.04.2006

  8. Vegetable Crop Pests. MEP 311.

    Kantzes, James G.; And Others

    As part of a cooperative extension service series by the University of Maryland, this publication introduces the identification and control of common agricultural pests of vegetable crops. The first of the five sections defines "pest" and "weed" and generally introduces different kinds of pests in the categories of insects,…

  9. Self-crafting vegetable snacks

    Raghoebar, Sanne; Kleef, van Ellen; Vet, de Emely

    2017-01-01

    Purpose: The purpose of this paper is to test whether the IKEA-effect (Norton et al., 2012) – better liking for self-crafted products than for identical products crafted by others – can be exploited to increase liking and consumption of vegetable snacks in children. Design/methodology/approach: A

  10. Flavour release from dried vegetables

    Ruth, van S.M.

    1995-01-01

    The research described in this thesis was focused on the development of an in vitro model system for isolation of volatile compounds from dried vegetables under mouth conditions, such as volume of the mouth, temperature, salivation and mastication. Instrumental analysis of these

  11. Puente sobre el rio Medway

    Freeman, Fox, Ingenieros

    1963-02-01

    have been prestressed both longitudinally and transversally. Between the two circulation roadways an elastic barrier has been placed, supported on metal posts.El puente sobre el río Medway tiene la misión de salvar dicho río en el nuevo trazado de carretera necesario para aliviar el denso tráfico estival entre Dower y Londres. Está situado en las proximidades de la ciudad de Rochester. La estructura se ha construido utilizando las vías de concurso. De todos los tipos presentados se eligió una estructura de hormigón armado. La longitud total de la obra es de 1.000 m. Los tres tramos principales de la obra salvan el río. El central es de 152 m de luz, y los dos adyacentes son de 103 m cada uno. Los accesos tienen un total de 18 tramos, que arrojan una longitud de 654 m. La anchura del puente es de 34 m, y la calzada se ha subdividido en dos direcciones de tráfico de 7,30 m cada una y, además, se han dejado dos espaldones laterales de 2,40 m de anchura. En planta se puede admitir que el puente tiene una alineación recta con una ligerísima curva, y que en el plano vertical presenta una pendiente de desagüe entre las pilas 9 y 10. Los estribos son de hormigón armado: tipo celular el del este y de hormigón en masa el del oeste. Los estribos se apoyan sobre pilotes hexagonales de hormigón armado cuya circunferencia circunscrita tiene 55 cm de radio y de 12 a 20 m de longitud. Cuando el firme se hallaba a profundidades inferiores a 6 m, los estribos se cimentaban directamente sobre el firme. Las pilas constituyen pórtico y tienen una altura variable de 9 a 30 m sobre el nivel del suelo. Los tramos de acceso forman una estructura continua simplemente apoyada. Cada tramo se compone de ocho vigas longitudinales de 30 a 41 m de longitud y de 190 toneladas cada una. Estas vigas son del tipo pretensado y prefabricado. El tramo central es del tipo cantilever, constituido por dos brazos, de 30 m de longitud, formados por vigas cajón. Cada una de estas vigas consta

  12. Serving vegetables first: A strategy to increase vegetable consumption in elementary school cafeterias.

    Elsbernd, S L; Reicks, M M; Mann, T L; Redden, J P; Mykerezi, E; Vickers, Z M

    2016-01-01

    Vegetable consumption in the United States is low despite the wealth of evidence that vegetables play an important role in reducing risk of various chronic diseases. Because eating patterns developed in childhood continue through adulthood, we need to form healthy eating habits in children. The objective of this study was to determine if offering vegetables before other meal components would increase the overall consumption of vegetables at school lunch. We served kindergarten through fifth-grade students a small portion (26-33 g) of a raw vegetable (red and yellow bell peppers) while they waited in line to receive the rest of their lunch meal. They then had the options to take more of the bell peppers, a different vegetable, or no vegetable from the lunch line. We measured the amount of each vegetable consumed by each child. Serving vegetables first greatly increased the number of students eating vegetables. On intervention days most of the vegetables consumed came from the vegetables-first portions. Total vegetable intake per student eating lunch was low because most students chose to not eat vegetables, but the intervention significantly increased this value. Serving vegetables first is a viable strategy to increase vegetable consumption in elementary schools. Long-term implementation of this strategy may have an important impact on healthy eating habits, vegetable consumption, and the health consequences of vegetable intake. Copyright © 2015 Elsevier Ltd. All rights reserved.

  13. Puente sobre el Oosterschelde, Holanda

    Hoving, H. T.

    1967-03-01

    Full Text Available This new bridge, forming part of the Delta project, is made of concrete, and was built by successive overhangs. Precast units were mainly used. The bridge is 5,000 m long, and is 11.85 m wide. The main spans are 95 m in length, except one, which can be opened up to sea traffic, which is 40 m long. The free height of the bridge over the sea is 15 m, which is insufficient for large ships. This required that one of the spans, in deep water, should open up, on hinges, and provide free passage to large ships. The intermediate bridge supports are of special interest. They rest on piles which go down to 38 m. They are hollow, cylindrical, of 4.35 m external diameter, and are driven into the ground in several stages, as they penetrate through the sands at the bottom of the Oosterschelde. To drive them in, an excavating device, inside the pile, was utilised, and also a dredging and suction mechanism, to clean out the bottom, and allow the piles to sink by gravity. But when external friction did not allow this to happen, the piles were weighed down with up to 500 tons of ballast. A series of three of these piles, in a row, makes up each bridge support. A cross member over the pile heads supports, in turn, the bridge deck. The bridge was built in successive sections, overhanging from each support, and then finally connected with a central portion. Use of precast units has been very extensive, so that the bridge can be justiaflably regarded as being prefabricated.Este nuevo puente, que forma parte del Plan de obras denominadas del Delta, es de hormigón y se ha construido por el procedimiento de voladizos sucesivos, utilizando, en su mayor parte, elementos prefabricados. Tiene una longitud total de 5.000 m; una anchura de 11,85 m; tramos principales de 95 m de luz, salvo uno, levadizo, que tiene 40 m. La altura libre sobre las ag^uas del mar es de 15 m, que es insuficiente para las naves de gran tonelaje; esto exigió que uno de sus tramos, en aguas

  14. Heterogeneidad en la expresión del comercio sexual femenino en la Ciudad de México Heterogeneity in the expression of female sexual commerce in Mexico City

    Felipe Uribe-Salas

    2007-02-01

    Full Text Available OBJETIVOS: Evaluar la relación entre características indagadas en el nivel individual de mujeres trabajadoras sexuales (MTS con el tipo de sitio en que trabajan. MATERIAL Y MÉTODOS: Se construyó un marco muestral de sitios (bares, estéticas y puntos de calle en la Delegación Cuauhtémoc de la Ciudad de México. Durante 1993, fueron seleccionadas MTS que contestaron un cuestionario sobre características socioeconómicas, demográficas y de comportamiento sexual, y proporcionaron una muestra de sangre para la evaluación de la seroprevalencia del virus herpes simplex tipo 2 (VHS-2 mediante la prueba de Western blot. RESULTADOS: Características de las mujeres como edad, escolaridad, índice de nivel socioeconómico, indicadores de comportamiento sexual y seroprevalencia del VHS-2, estuvieron relacionados con el sitio de trabajo. CONCLUSIONES: Diferentes características socioeconómicas y de comportamiento sexual, medidas en el nivel individual de las mujeres estudiadas, estuvieron significativamente relacionadas con procesos sociales como el de la organización del sexo comercial femenino en la Ciudad de México. Esta organización no es homogénea, sino que toma diferentes expresiones según sitios de trabajo.OBJECTIVES: To evaluate the relationships among the socioeconomic, demographic, and sexual behavior characteristics of commercial sexual workers (CSW and their work site. MATERIAL AND METHODS: A sampling frame was constructed in the Delegación Cuauhtémoc, México City, which included massage parlors, bars, and street points. During 1993, women were selected who answered a questionnaire that inquired about socio-economic and demographic characteristics and sexual behavior, and who gave a blood sample for evaluating the seroprevalence of the herpes simplex virus type 2 (HSV-2, which was evaluated using a Western blot test. RESULTS: Characteristics such as age, education, socio-economic level, sexual behavior, and seroprevalence

  15. Somos un envase : Discursos sobre el aborto

    Löcher, Jennifer Irene

    2014-01-01

    No hay persona que no tenga opinión acerca del asunto y, cada vez más, la sociedad argentina debate sobre la pregunta de si se debe legalizar/despenalizar el aborto o no. Nunca antes se habló tanto sobre el tema públicamente: se publican artículos en los diarios, hay manifestaciones a favor y hay manifestaciones en contra de la legalización del aborto. El siguiente trabajo pretende relevar y analizar discursos que circulan socialmente alrededor del debate sobre el aborto. (Párrafo extraíd...

  16. Considerações sobre a toxicocinética da Cannabis sativa L. ou maconha, com enfase no homem

    Luiz Marques de Sá

    Full Text Available O presente artigo consiste em uma análise sobre a origem da Cannabis no Brasil, suas principais substâncias químicas, realçando o Δ9 tetrahidrocanabinol como responsável pelos efeitos farmacológicos. é citado também o fato de existirem duas formas de numeração dos carbonos do ∆THC. Para melhor entender a toxicocinética foram feitas considerações sobre as doses de maconha, que vão variar de acordo com o usuário, e origem do vegetal. Finalmente é feito urn estudo detalhado sobre, absorção, distribuição, armazenamento, biotransformação e eliminação dos diversos componentes químicos da maconha.

  17. Estudo multicasos sobre atividades inovativas

    Sonia Regina Hierro Parolin

    2013-09-01

    Full Text Available Em estudos sobre competitividade argumenta-se que as empresas necessitam de estratégias baseadas em inovações e de capacidades internas em constantes e intensas transformações, não somente nos padrões tecnológicos, mas também no encadeamento do processo de gestão das atividades inovativas, como processos dinâmicos, não lineares e diversificados, em função de múltiplos fatores dos ambientes interno e externo. Para contribuir com essas discussões, neste artigo apresenta-se um estudo multicasos em quatro indústrias de médio e grande portes, de segmentos, densidades tecnológicas e históricos com inovações diferentes entre si. Como principais resultados, salientam-se o encadeamento das atividades inovativas como parte de uma estratégia organizacional para obter resultados com inovação e a afluência de todas as pessoas, e não somente as alocadas em pesquisa e desenvolvimento, para o cumprimento dessa estratégia.

  18. Notas sobre publicaciones medievales portuguesas

    José Luis MARTÍN

    2009-11-01

    Full Text Available Contra lo que debiera suceder, la proximidad con Portugal no incita al conocimiento de su historia y son muy raros los manuales de Historia de España en los que se concede a la Edad Media Portuguesa la importancia que realmente tiene, y en los tratados de Historia Medieval Europea el espacio dedicado a Portugal es mínimo, al menos hasta la época de los Descubrimientos; por otra parte, son contados los medievalistas españoles que se interesan por la historia de Portugal. Ante estos silencios y ante la escasa presencia en las bibliotecas españolas de obras portuguesas el estudiante de historia puede pensar que el país vecino carece de medievalistas de relieve, que su historia medieval está por hacer... y nada más lejos de la realidad como intentaré probar en este breve comentario, sin ánimo exhaustivo, sobre algunas de las últimas publicaciones aparecidas en Portugal.

  19. Biologically active matters in soy vegetative mass

    GNOEVYY I.V.

    2013-01-01

    Maintenance of row of bioactive matters of phenic nature in particular, isoflavonoids is investigational at to soy-bean cakes to vegetative mass of soy in the phases of vegetation of 8 the most widespread sorts of soy in Ukraine.

  20. Vegetation - San Felipe Valley [ds172

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

  1. Biota - 2009 Vegetation Inventory - Lake Ashtabula, ND

    Army Corps of Engineers, Department of the Army, Department of Defense — 2009 Vegetation Classification for Lake Ashtabula, ND Vegetation Project Report, OMBIL Environmental Stewardship - Level 1 Inventory, U.S. Army Corps of Engineers...

  2. Ecosystems past: prehistory of California vegetation

    C.I. Millar; W.B. Woolfenden

    2016-01-01

    The history of California's vegetation, from origins in the Mesozoic through Quaternary is outlined. Climatic and geologic history and the processes driving changes in vegetation over time are also described. 

  3. Marketing African Leafy Vegetables: Challenges and Opportunities ...

    Marketing African Leafy Vegetables: Challenges and Opportunities in the Kenyan Context. ... The market share of ALVs vis-à-vis other vegetable species, particularly kales, cabbages and ... EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT

  4. Biota - 2011 Vegetation Inventory - Marsh Lake, MN

    Army Corps of Engineers, Department of the Army, Department of Defense — 2011 Vegetation Classification for Marsh Lake, MN Vegetation Project Report, OMBIL Environmental Stewardship - Level 1 Inventory. Marsh Lake is located on the...

  5. Los derechos de autor sobre obtenciones vegetales

    Rosario Silva Gilli

    2015-01-01

    Full Text Available Contenido: Las creaciones en la agricultura. Los derechos de autor sobre obtenciones vegetales. El Convenio Internacional para la protección de las obtenciones vegetales (París 1961 y sus revisiones de Ginebra 1972, 1978,1991 Objeto de la protección legal. Condiciones del cultivar. Alcance de la protección. La protección de obtenciones vegetales en el Mercosur. Los Derechos de autor en el Mercosur. El Protocolo de Armonización de normas sobre Propiedad Intelectual en el Mercosur. El Acuerdo de Cooperación y facilitación sobre la protección de las obtenciones vegetales en los Estados Partes del Mercosur.  Alcance de la normativa Mercosur. Los Derechos sobre cultivares en Uruguay. Los Derechos de autor como derechos humanos. ¿Derechos de autor vs. derecho de propiedad intelectual? Reflexión final

  6. Irradiation of fruit and vegetables

    O'Beirne, David

    1987-01-01

    There is likely to be less economic incentive to irradiate fruits and vegetables compared with applications which increase the safety of foods such as elimination of Salmonella or decontamination of food ingredients. Of the fruit and vegetable applications, irradiation of mushrooms may offer the clearest economic benefits in North-Western Europe. The least likely application appears to be sprout inhibition in potatoes and onions, because of the greater efficiency and flexibility of chemical sprout inhibitors. In the longer-term, combinations between irradiation/MAP/other technologies will probably be important. Research in this area is at an early stage. Consumer attitudes to food irradiation remain uncertain. This will be a crucial factor in the commercial application of the technology and in the determining the balance between utilisation of irradiation and of technologies which compete with irradiation. (author)

  7. Hyperspectral remote sensing of vegetation

    Thenkabail, Prasad S.; Lyon, John G.; Huete, Alfredo

    2011-01-01

    Hyperspectral narrow-band (or imaging spectroscopy) spectral data are fast emerging as practical solutions in modeling and mapping vegetation. Recent research has demonstrated the advances in and merit of hyperspectral data in a range of applications including quantifying agricultural crops, modeling forest canopy biochemical properties, detecting crop stress and disease, mapping leaf chlorophyll content as it influences crop production, identifying plants affected by contaminants such as arsenic, demonstrating sensitivity to plant nitrogen content, classifying vegetation species and type, characterizing wetlands, and mapping invasive species. The need for significant improvements in quantifying, modeling, and mapping plant chemical, physical, and water properties is more critical than ever before to reduce uncertainties in our understanding of the Earth and to better sustain it. There is also a need for a synthesis of the vast knowledge spread throughout the literature from more than 40 years of research.

  8. Phenolic Compounds in Brassica Vegetables

    Pablo Velasco

    2010-12-01

    Full Text Available Phenolic compounds are a large group of phytochemicals widespread in the plant kingdom. Depending on their structure they can be classified into simple phenols, phenolic acids, hydroxycinnamic acid derivatives and flavonoids. Phenolic compounds have received considerable attention for being potentially protective factors against cancer and heart diseases, in part because of their potent antioxidative properties and their ubiquity in a wide range of commonly consumed foods of plant origin. The Brassicaceae family includes a wide range of horticultural crops, some of them with economic significance and extensively used in the diet throughout the world. The phenolic composition of Brassica vegetables has been recently investigated and, nowadays, the profile of different Brassica species is well established. Here, we review the significance of phenolic compounds as a source of beneficial compounds for human health and the influence of environmental conditions and processing mechanisms on the phenolic composition of Brassica vegetables.

  9. Clearing and vegetation management issues

    Anon.

    1994-01-01

    Clearing and continued management of incompatible plant species is critical to maintaining safe and reliable transmission and distribution lines at British Columbia Hydro. As part of a general review of policies regarding rights-of-way, the clearing of BC Hydro rights-of-way was studied by a task team in order to formulate a set of recommended policies and procedures to guide employees in all rights-of-way decisions, and to provide clear direction for resolution of all rights-of-way issues in a cost-effective manner. Issues reviewed were: clearing standards and line security standardization for transmission circuits; clearing rights for removal of trees or management of vegetation beyond the statutory right-of-way; clearing and vegetation management procedures; tree replacement; arboricultural techniques; periodic reviewing of clearing practices; compensation for tree removal; herbicide use; and heritage and wildlife trees. Justification for the recommendation is provided along with alternate options and costs of compliance

  10. IX Simposio Ibérico sobre Nutrición Mineral de las Plantas

    Abadía Bayona, Javier

    2003-01-01

    Del 10 al 13 de Septiembre de 2002 se celebró el IX Simposio Ibérico sobre Nutrición Mineral de las Plantas en el Campus de Aula Dei de Zaragoza. El Simposio se realizó bajo los auspicios de la Sociedad Española de Fisiología Vegetal, el Consejo Superior de Investigaciones Científicas (CSIC), el Instituto Agronómico Mediterráneo de Zaragoza-Centro Internacional de Altos Estudios Agronómicos Mediterráneos (CIHEAM-IAMZ), la Asociación Internacional para la Optimización de...

  11. Conceito e espaço da pequena empresa na estrutura industrial: heterogeneidade e formas de inserção Concept and space of small business in the industrial structure: heterogeneity and forms of insertion

    Maria Carolina de Azevedo Ferreira de Souza

    2008-12-01

    Full Text Available Com base no exame da literatura pertinente, este trabalho busca ampliar o debate sobre o conceito de pequena empresa e identifica as formas de sua inserção na estrutura industrial. Ficou evidenciada a conceituação da pequena empresa como "pequeno capital", cuja posição e desempenho estão estreitamente vinculados ao processo de oligopolização. Nessa direção, procurou-se deixar clara a existência de quatro possíveis trajetórias de inserção para o segmento: disputa de espaço em mercados ainda pouco oligopolizados e com acentuada concorrência em preços; exploração de novos "nichos" de mercado; organização "em rede", com predominância de pequenas empresas e sem liderança explícita de grandes empresas; e inserção em redes de subcontratação comandadas por grandes empresas. Frente a esse conjunto de trajetórias, fica evidente que é inadequado o tratamento das pequenas empresas como um bloco homogêneo (ou como uma "questão geral", seja no que se refere às condições que explicam sua sobrevivência e seu crescimento, seja no âmbito das medidas de política econômica voltadas à sua promoção. O importante passa a ser não o porte, mas antes o potencial de contribuição para a obtenção dos resultados planejados ao se definir medidas de apoio, entre elas a preservação e aumento do emprego.Based on the analysis of the relevant literature, this study amplifies the debate about the concept of small business and identifies the possible space for it in the industrial structure. The concept of small business has been evidenced as "small capital", whose position and performance are closely linked to the process of oligopolization. Along these lines, four possible insertion trajectories for the segment have been sought to be highlighted: struggle for space in markets still not so oligopolized and with emphasized price competition; exploration of new market niches; network organization, with predominance of small business

  12. From heterogeneity to harmonization? Recent trends in European health policy Da heterogeneidade à harmonização? Tendências recentes na política de saúde européia

    Thomas Gerlinger

    2007-01-01

    ítica é utilizada cada vez mais para fortalecer a competitividade econômica. A previsão é de que a pressão crescente sobre os países membros irá conter custos e promover a oferta de serviços de saúde com base no mercado.

  13. Heterogeneidad de los trastornos metabólicos de las etapas iniciales de la diabetes mellitus 2 Metabolic disorders and its diversity during early stages of type 2 diabetes mellitus

    Roberto M. González Suárez

    2009-04-01

    Full Text Available ANTECEDENTES: la prediabetes ha sido definida como una situación de riesgo de padecer diabetes mellitus, que precede a la aparición de las formas clínicas de la enfermedad y es causada por trastornos de la secreción de insulina y de la sensibilidad a la insulina. OBJETIVO: establecer el perfil de trastornos metabólicos de un grupo de sujetos en la etapa subclínica de la diabetes mellitus para identificar subpoblaciones susceptibles a intervenciones específicas. MÉTODOS: se utilizó la información obtenida sobre el estado de la tolerancia a la glucosa, de la sensibilidad a la insulina y de la secreción de insulina en el estudio inicial de un grupo de 40 participantes en una investigación prospectiva, a los que, 2 años después, se les diagnosticó una diabetes manifiesta. RESULTADOS: los sujetos con diabetes mellitus inicial presentaban un amplio rango de trastornos de la tolerancia a la glucosa (tolerancia a la glucosa normal, 22 %; tolerancia a la glucosa alterada, 35 %; y tolerancia a la glucosa alterada + glucemia en ayunas alterada, 43 %. El 95 % de los obesos y el 50 % de los no obesos presentaban resistencia a la insulina, mientras que se encontró una disminución de la secreción de insulina en el 50 % de los sujetos de ambos grupos. No se encontró asociación entre el grado de deterioro de la tolerancia a la glucosa y los trastornos metabólicos estudiados. CONCLUSIONES: los sujetos en las etapas iniciales de la diabetes constituyen una población heterogénea con distintos grados de deterioro del metabolismo energético, por lo que las intervenciones para prevenir la diabetes en estas personas requieren un diagnóstico y tratamiento personalizado.BACKGROUNDS: the prediabetes has been defined as a risk situation related with the presence of future diabetes, preceding appearance of clinical ways of the disease, and it is provoked by disorders from insulin secretion and the sensitivity to insulin. OBJECTIVE: to establish a

  14. Waste vegetable oil survey report

    MacLeod, R. [Science enterprise Algoma seA, Sault Ste. Marie, ON (Canada)

    2009-02-06

    This study was conducted to estimate potential sources of feedstock waste oils for biodiesel production in the Sault Ste. Marie region of Ontario. Two feedstocks were investigated over a period of several months, notably cooking oil and waste vegetable oil. The study was conducted to examine oil throughput, collection practices, and to gauge interest in local initiatives. A distribution list of commercial restaurant listings was developed, and surveys were conducted with members of private enterprises, city government, and non-profit stakeholders in the region. Average volumes of waste vegetable oil were presented for different types of restaurants. The various types of oil used in the restaurants were also quantified. Results of the study showed a positive public response to the idea of a local biodiesel initiative. Steak house, fast food, and Italian establishments generated the largest portion of waste vegetable oil amongst survey respondents. However, the highest response rates came from establishments with little or no oil consumption. Many franchise fast food restaurants are already in contracts with waste oil removal companies. 3 tabs., 3 figs.

  15. Conocimientos sobre incontinencia urinaria en pacientes hospitalizados

    Otto Guillen Lopez

    2003-10-01

    Full Text Available Objetivo: Determinar el nivel de conocimientos sobre incontinencia urinaria (IU en pacientes hospitalizados. Material y métodos: Estudio transversal, descriptivo; se entrevistó una muestra por saturación de 325 pacientes hospitalizados de 30 años a más del Hospital Nacional Cayetano Heredia (HNCH, Lima - Perú, utilizando un cuestionario de conocimientos sobre incontinencia, considerándose como adecuado conocimiento cuando había más de 50% de aciertos en él. Resultados: Solamente 35.7% tuvieron conocimiento adecuado sobre IU. Hasta 90% conocía acerca del éxito del tratamiento y posibilidad de curación de los pacientes incontinentes. Sin embargo, 75% consideraron erróneamente que la IU era consecuencia inevitable del envejecimiento, mientras menos de 50% de pacientes conocía el papel de ciertos medicamentos y ejercicios en la IU. Conclusiones: Se demostró un pobre conocimiento general sobre la IU, siendo necesaria una intervención de los profesionales de la salud en la educación de la población, sobre todo hospitalizada y con factores predisponentes para desarrollar IU, para así poder modificar las ideas erróneas que existen sobre el tema. (Rev Med Hered 2003; 14: 186-194.

  16. PERSPECTIVAS INFANTILES SOBRE LA TERRITORIALIDAD

    NOELIA ENRIZ

    2009-12-01

    Full Text Available In this paper we propose a different approach to children's ideas about the geographical area in the particular context of the Mbyá Guarani population, from Misiones (Argentine. The territorial fragility, that is exposed to the indigenous people in Argentina aremanifested daily in several areas. Mbyá population, has been crossed by the boundaries of national states of Paraguay, Brazil and Argentina. The sedentary and enclosures land processes in different states, have prompted changes in the logic of subsistence, housing and community organization. In Misiones province case, bureaucratic accreditation of land titles is postponed, the state is not committed to the realization of this right.RESUMEN: En este trabajo nos proponemos un acercamiento a las diversas ideas infantiles sobre el territorio habitado, en el contexto particular de la población mbyá guaraní de Misiones. La fragilidad territorialidad a la que es expuesta la población indígena en Argentina se manifiestan cotidianamente en diversas áreas. La población mbyá, ha sido surcada por los límites de los estados nacionales de Paraguay, Brasil y Argentina. La sedentarización y los cercamientos de tierras en los diferentes estados, han impulsado transformaciones de las lógicas de subsistencia, de habitación y organización comunitaria. En el caso de la provincia de Misiones la acreditación burocrática de los títulos de tierras se encuentra aplazada, el estado no se compromete con la concreción de este derecho.

  17. Consideraciones preliminares sobre la credibilidad

    Fernando Verdugo

    2004-01-01

    Full Text Available A modo de introducción al Seminario Interno de Profesores de la Facultad de Teología de la PUC, el autor recuerda, en primer lugar, lo que suele entenderse por "credibilidad" y, también, algunos de los criterios generales por los cuales algo o alguien adquiere la calidad de creíble (el que sea razonable, relevante o significativo, capaz de producir gozo estético, etc.. Luego, en la parte más extensa, el autor vuelve a llamar la atención sobre la necesidad de atender a los condicionamientos culturales de la fe cristiana. La fe, al igual que toda experiencia humana, está culturalmente mediada. Tomar conciencia de ese hecho y asumir las consecuencias metodológicas es indispensable para una teología que quiere poner atención a los desafíos actuales y contribuir así a la credibilidad del cristianismoThis article reprints the introductory session to the internal seminar of lecturers from the Faculty of Theology of the UC. In the first place, the author sums up what is usually understood by `credibility' and the general criteria through which something or someone gains credibility (being reasonable, relevant or significant, capable of producing aesthetic pleasure. Then the author deals at length with the need to take notice of the cultural conditionings of the Christian faith. The faith, the same as any other human experience, is culturally mediated. It is crucial for theology to become aware of this fact and come to terms with its methodological consequences, if it wants to face current challenges and so contribute to the credibility of Christianity

  18. Importancia de la heterogeneidad ambiental en la ecología de plantas carnívoras mediterráneas: implicaciones para la conservación Environmental heterogeneity and the ecology of carnivorous plants: implications for conservation

    Regino Zamora

    2002-03-01

    . Pinguicula vallisneriifolia inhabits wet limestone rock walls and cliffs, being able to reproduce by seeds and asexually (by stolons and axillary buds. The complex orography of Mediterranean mountains favors sunny (hot and dry and shady (cool and wet contrasting expositions. Along the sun-shade gradient, there were variations in plant flowering phenology, as well as in animal species that interacted with the plants (prey, pollinators and kleptoparasites, even at a very restricted spatial scale. The ecological consequence is that the marked spatial variability in abiotic conditions results in a site-specific mosaic of plant-animal interactions, and hence of selective pressures of animals upon plants. Plant populations have also different demographic structures depending on the microhabitat (sunny, dry versus wet, shady. As a result, different demographic patterns appear on different localities or different habitats within the same locality: populations living in moist, shady patches show high proportions of seedlings as plants reproduce both sexually and asexually, resulting in viable populations. On the contrary, plants living in dry, sunny rocky substrates, despite sexual and asexual reproduction, have no seedling recruitment because of wet microsite limitation. These populations are, therefore, dominated by vegetative individuals. Practical guiadance are provided in order to preserve these microclimatically structured populations

  19. Algunas cuestiones sobre la enseñanza y el aprendizaje de las matemáticas en los estudios de economía y empresariales

    Juan Manuel Sánchez-Quinzá

    2002-01-01

    Full Text Available En este trabajo se pretende hacer un estudio de la situación actual de la enseñanza de las matemáticas en los primeros cursos de los estudios de económicas y empresariales. En lugar de darle un enfoque externo y objetivo, comparar lo que se estudia y como se estudia antes de la universidad y en la universidad, se ha optado por entrar en temas cognitivos más próximos a los que estudia la educación matemática. La investigación en educación matemática se desarrolló de modo espectacular a partir de los años 60, pero sólo recientemente, en 1994, comenzó a publicarse Research in Collegiate Mathematics Education enfocada, exclusivamente, a los problemas educativos de las matemáticas relativos a los primeros años de universidad. Un numeroso grupo de investigadores educativos se están dedicando a estudiar problemas psicológicos y pedagógicos que aparecen en los estudios de matemáticas en los primeros cursos universitarios. Las asignaturas de matemáticas para la economía y la empresa han sido motivo de preocupación y reflexión para el profesorado desde hace años. Se ha escrito sobre su necesidad, sobre los modelos matemáticos en economía y las deducciones lógicas que permiten. Se ha señalado la mala preparación inicial de los alumnos, su desconocimiento del lenguaje matemático, su heterogeneidad, su bajo rendimiento escolar, … y se ha propuesto una asignatura inicial Matemáticas 0, hacer hincapié muy pronto en los símbolos lógicos, … (ver Actas IX Jornadas ASEPUMA. Por otra parte los programas de las asignaturas se han normalizado hasta constituir un bagaje que debe adquirir el alumno de los estudios de economía y empresa. ¿Será necesario formar un criterio que permita detectar el tamaño de las dificultades cognitivas y tomar decisiones educativas?. Por supuesto, que esta es una labor ardua y que este trabajo no es más que una reflexión mejor o peor organizada. Es el profesorado convencido el que descubrir

  20. Health Benefits of Fruits and Vegetables1

    Slavin, Joanne L.; Lloyd, Beate

    2012-01-01

    Fruits and vegetables are universally promoted as healthy. The Dietary Guidelines for Americans 2010 recommend you make one-half of your plate fruits and vegetables. Myplate.gov also supports that one-half the plate should be fruits and vegetables. Fruits and vegetables include a diverse group of plant foods that vary greatly in content of energy and nutrients. Additionally, fruits and vegetables supply dietary fiber, and fiber intake is linked to lower incidence of cardiovascular disease and obesity. Fruits and vegetables also supply vitamins and minerals to the diet and are sources of phytochemicals that function as antioxidants, phytoestrogens, and antiinflammatory agents and through other protective mechanisms. In this review, we describe the existing dietary guidance on intake of fruits and vegetables. We also review attempts to characterize fruits and vegetables into groups based on similar chemical structures and functions. Differences among fruits and vegetables in nutrient composition are detailed. We summarize the epidemiological and clinical studies on the health benefits of fruits and vegetables. Finally, we discuss the role of fiber in fruits and vegetables in disease prevention. PMID:22797986

  1. Microbiological Spoilage of Fruits and Vegetables

    Barth, Margaret; Hankinson, Thomas R.; Zhuang, Hong; Breidt, Frederick

    Consumption of fruit and vegetable products has dramatically increased in the United States by more than 30% during the past few decades. It is also estimated that about 20% of all fruits and vegetables produced is lost each year due to spoilage. The focus of this chapter is to provide a general background on microbiological spoilage of fruit and vegetable products that are organized in three categories: fresh whole fruits and vegetables, fresh-cut fruits and vegetables, and fermented or acidified vegetable products. This chapter will address characteristics of spoilage microorganisms associated with each of these fruit and vegetable categories including spoilage mechanisms, spoilage defects, prevention and control of spoilage, and methods for detecting spoilage microorganisms.

  2. Estimating vegetation dryness to optimize fire risk assessment with spot vegetation satellite data in savanna ecosystems

    Verbesselt, J.; Somers, B.; Lhermitte, S.; van Aardt, J.; Jonckheere, I.; Coppin, P.

    2005-10-01

    The lack of information on vegetation dryness prior to the use of fire as a management tool often leads to a significant deterioration of the savanna ecosystem. This paper therefore evaluated the capacity of SPOT VEGETATION time-series to monitor the vegetation dryness (i.e., vegetation moisture content per vegetation amount) in order to optimize fire risk assessment in the savanna ecosystem of Kruger National Park in South Africa. The integrated Relative Vegetation Index approach (iRVI) to quantify the amount of herbaceous biomass at the end of the rain season and the Accumulated Relative Normalized Difference vegetation index decrement (ARND) related to vegetation moisture content were selected. The iRVI and ARND related to vegetation amount and moisture content, respectively, were combined in order to monitor vegetation dryness and optimize fire risk assessment in the savanna ecosystems. In situ fire activity data was used to evaluate the significance of the iRVI and ARND to monitor vegetation dryness for fire risk assessment. Results from the binary logistic regression analysis confirmed that the assessment of fire risk was optimized by integration of both the vegetation quantity (iRVI) and vegetation moisture content (ARND) as statistically significant explanatory variables. Consequently, the integrated use of both iRVI and ARND to monitor vegetation dryness provides a more suitable tool for fire management and suppression compared to other traditional satellite-based fire risk assessment methods, only related to vegetation moisture content.

  3. Consenso mexicano sobre la dispepsia

    R. Carmona-Sánchez

    2017-10-01

    Full Text Available Desde la publicación de las guías de dispepsia 2007 de la Asociación Mexicana de Gastroenterología ha habido avances significativos en el conocimiento de esta enfermedad. Se realizó una revisión sistemática de la literatura en PubMed (01/2007 a 06/2016 con el fin de revisar y actualizar las guías 2007 y proporcionar nuevas recomendaciones basadas en evidencia. Se incluyeron todas las publicaciones en español e inglés, de alta calidad. Se redactaron enunciados que fueron votados utilizando el método Delphi. Se estableció la calidad de la evidencia y la fuerza de las recomendaciones según el sistema GRADE para cada enunciado. Treinta y un enunciados fueron redactados, votados y calificados. Se informan nuevos datos sobre definición, clasificación, epidemiología y fisiopatología. La endoscopia debe realizarse en dispepsia no investigada cuando hay datos de alarma o falla al tratamiento. Las biopsias gástricas y duodenales permiten confirmar infección por Helicobacter pylori y excluir enfermedad celiaca, respectivamente. Establecer una fuerte relación médico-paciente, cambios en la dieta y en el estilo de vida son útiles como medidas iniciales. Los bloqueadores H2, inhibidores de la bomba de protones, procinéticos y fármacos antidepresivos son efectivos. La erradicación de H. pylori puede ser eficaz en algunos pacientes. Con excepción de Iberogast y rikkunshito, las terapias complementarias y alternativas carecen de beneficio. No existe evidencia con respecto a la utilidad de prebióticos, probióticos o terapias psicológicas. Los nuevos enunciados proporcionan directrices basadas en la evidencia actualizada. Se presenta la discusión, el grado y la fuerza de la recomendación de cada uno de ellos.

  4. Vegetation fire proneness in Europe

    Pereira, Mário; Aranha, José; Amraoui, Malik

    2015-04-01

    Fire selectivity has been studied for vegetation classes in terms of fire frequency and fire size in a few European regions. This analysis is often performed along with other landscape variables such as topography, distance to roads and towns. These studies aims to assess the landscape sensitivity to forest fires in peri-urban areas and land cover changes, to define landscape management guidelines and policies based on the relationships between landscape and fires in the Mediterranean region. Therefore, the objectives of this study includes the: (i) analysis of the spatial and temporal variability statistics within Europe; and, (ii) the identification and characterization of the vegetated land cover classes affected by fires; and, (iii) to propose a fire proneness index. The datasets used in the present study comprises: Corine Land Cover (CLC) maps for 2000 and 2006 (CLC2000, CLC2006) and burned area (BA) perimeters, from 2000 to 2013 in Europe, provided by the European Forest Fire Information System (EFFIS). The CLC is a part of the European Commission programme to COoRdinate INformation on the Environment (Corine) and it provides consistent, reliable and comparable information on land cover across Europe. Both the CLC and EFFIS datasets were combined using geostatistics and Geographical Information System (GIS) techniques to access the spatial and temporal evolution of the types of shrubs and forest affected by fires. Obtained results confirms the usefulness and efficiency of the land cover classification scheme and fire proneness index which allows to quantify and to compare the propensity of vegetation classes and countries to fire. As expected, differences between northern and southern Europe are notorious in what concern to land cover distribution, fire incidence and fire proneness of vegetation cover classes. This work was supported by national funds by FCT - Portuguese Foundation for Science and Technology, under the project PEst-OE/AGR/UI4033/2014 and by

  5. Vegetative propagation of Bambusa vulgaris

    Rafael Malfitano Braga

    2017-06-01

    Full Text Available Bamboo is an important source of raw material of multiple uses. The development of simple techniques for its propagation is a practical way to enable its implementation in ownership of low technology. The present work had the objective of evaluating artisanal propagation methods for Bambusa vulgaris. Two types of propagules were tested, with buds budded or not, and three relative positions to the removal of vegetative material on the culm. The best propagule was with only one node, extracted from the lower thirds of the stem, presenting 72% of rooting. This result demonstrates its potential for seedling production of this species under low tech.

  6. Vegetable oils as diesel fuel

    Fedeli, E.; Girelli, A.

    2001-01-01

    During the seventies, one of the recurring fuels crisis gave rise to research on alternative sources and among them to the idea of utilizing vegetable oils. The research work made clear that the oils cannot be utilized as such but they must be transformed in simple esters, eliminating the problems arising from the presence of the glycerine. The Experiment Stations of the Industry, Commerce and Handicraft Department of the Italian Government, by request of the last one, in the '70/'80 has done a successful experimentation that is presented in the paper [it

  7. Acid precipitation and forest vegetation

    Tamm, C O; Cowling, E B

    1977-04-01

    Effects of acidic precipitation on forest vegetation may be classified as being either direct or indirect. Among the most important direct effects are damage to protective cuticular layers, interference with normal functioning of guard cells, poisoning of plant cells after diffusion of acidic substances through stomata or cuticle and interference with reproductive processes. Indirect effects include accelerated leaching of substances from foliar organs, increased susceptibility to drought and other environmental stress factors, and alteration of symbiotic associations and host-parasite interactions. The potential importance of nutrient uptake through foliage and the need to understand atmosphere-plant-soil interactions are stressed.

  8. Genetic parameters and heterogeneity of variance to milk yield in Murrah breed for Bayesian inference Heterogeneidade de variâncias e parâmetros genéticos para produção de leite em bubalinos da raça Murrah, mediante inferência Bayesiana

    Simone Inoe Araújo

    2008-09-01

    Full Text Available Data from 2061 lactations of 532 females of the Murrah breed, daughters of 44 sires, calving from 1975 to 2001 were used to evaluate the effects of heterogeneity at variance on sires genetic evaluation. The standard deviation of the milk yield was used to classify the herds among high and low variability levels. An animal model, used to estimate variance component, included the fixed effect of herds-year, season of calving, animal random effect, permanent and temporary environments. Variance components were estimated to milk yield in both levels, considering the milk yield in each production level as different trait. Estimatives of heritability were 0.39, in general analysis, and equal to 0.33 and 0.41 for milk yield in high and low levels, respectively. Genetic correlations between high and low production levels were 58. The sires were selected according to the environment most changeable where daughters are raised, and not properly for its genetic breeding.Informações de 2061 registros de lactações de 532 fêmeas da raça Murrah, filhas de 44 reprodutores, com parições entre 1975 a 2001, foram utilizadas para se verificar a existência da heterogeneidade de variância para a produção de leite entre rebanhos e o seu impacto na classificação de reprodutores. O desvio padrão da produção de leite entre rebanhos foi utilizado para classificação dos rebanhos em níveis de alta e baixa variabilidade. Utilizou-se um modelo animal que incluiu os efeitos fixos de rebanho-ano, estação de parição, efeitos aleatórios de animal, ambiente permanente e ambiente temporário. Foram estimados os componentes de variância, considerando os rebanhos como uma única amostra e assumindo a produção de leite em cada nível de produção como característica diferente. Médias e componentes de variância foram maiores para o nível de alta produção e as estimativas de herdabilidade foram de 0,39 em ambos os níveis para a produção de leite e 0

  9. Heterogeneidade dos componentes de variância na produção de leite e seus efeitos nas estimativas de herdabilidade e repetibilidade Heterogeneity of variance components in milk production and their effects on estimates of heritability and repeatability

    Elmer Francisco Valencia Tapia

    2011-06-01

    Full Text Available Avaliou-se a heterogeneidade dos componentes de variância e seu efeito nas estimativas de herdabilidade e repetibilidade da produção de leite de bovinos da raça Holandesa. Os rebanhos foram agrupados de acordo com o nível de produção (baixo, médio e alto e avaliados na escala não transformada, raiz quadrada e logarítmica. Os componentes de variância foram estimados pelo método de máxima verossimilhança restrita. O modelo animal incluiu os efeitos fixos de rebanho-ano-estação e das covariáveis duração da lactação (efeito linear e idade da vaca ao parto (efeito linear e quadrático e os efeitos aleatórios genético aditivo direto, de ambiente permanente e residual. Na escala não transformada, todos os componentes de variância foram heterogêneos entre os três níveis de produção. Nesta escala, a variância residual e a fenotípica estavam associadas positivamente com o nível de produção enquanto que na escala logarítmica a associação foi negativa. A heterogeneidade da variância fenotípica e de seus componentes afetou mais as estimativas de herdabilidade que as da repetibilidade. A eficiência do processo de seleção para produção de leite poderá ser afetada pelo nível de produção em que forem estimados os parâmetros genéticos.It was evaluated the heterogeneity of components of phenotypic variance and its effects on the heritability and repeatability estimates for milk yield in Holstein cattle. The herds were grouped according to their level of production (low, medium and high and evaluated in the non-transformed, square-root and logarithmic scale. Variance components were estimated using a restricted maximum likelihood method based on an animal model that included fixed effects of herd-year-season, and as covariates the linear effect of lactation duration and the linear and quadratic effects of cow's age at calving and the random direct additive genetic, permanent environment and residual effects. In the

  10. DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD

    Sayuri P. Tamura M.

    2001-01-01

    Full Text Available «Disertación sobre equidad y justicia» es básicamente una respuesta a una inquietud en particular que yo tenía sobre las distintas posiciones que existen sobre estos dos temas y cómo definir cuál es la más acertada. Hice una descripción del punto de vista de Amartya Sen –la violación de los derechos sobre la propiedad privada es justificable si evitan las hambrunas2– frente al de Robert Nozick –la propiedad privada es un derecho fundamental y como tal debe ser respetado3–, sin embargo, aunque ambos enfoques son totalmente contrarios tienen mucho sentido, por lo cual es bastante difícil decidirse por uno en particular. Fue de esta forma, enfrentando sus opiniones, que yo logré desarrollar una posición frente a estas dos perspectivas, y así dar mi opinión al DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD SAYURI P. TAMURA M. Estudiante de Economía y Negocios Internacionales de la Universidad ICESI. respecto. Al final, llegué a una conclusión, que aunque no es la más original y tampoco es la única, tiene mucho sentido y seguramente de ser posible, la situación del país podría cambiar para bien.

  11. Osteogénesis imperfecta: mosaicismo germinal o evidencia de heterogeneidad genética. Presentación de una familia y revisión bibliográfica Osteogenesis imperfecta: germinal mosaicism or genetic heterogeneity evidence. Presentation of a family and a literature review

    Iván Hernández García

    2007-09-01

    Full Text Available La osteogénesis imperfecta clasifica entre las displasias óseas por alteraciones en la densidad y los defectos del modelaje óseo. El tipo I es la forma más frecuente de la enfermedad y se caracteriza por un patrón de herencia autosómico dominante. No es infrecuente que la enfermedad aparezca producto de una nueva mutación. También se ha demostrado que puede ser producida por mosaicismos germinales. Este trabajo documenta, por primera vez en Cuba, el caso de una familia con 3 individuos de diferente sexo afectados por osteogénesis imperfecta de tipo I mientras ninguno de los progenitores lo está. Se discute la posibilidad etiológica de un mosaicismo germinal y se valora asimismo la posibilidad de un patrón de herencia distinto del dominante, lo cual aportaría nueva evidencia de heterogeneidad genética.Osteogenesis imperfecta is one of the bone dysplasias caused by altered density and bone model defects. Type I is the most common form of disease and is characterized by an autosomal dominant inheritance pattern. Sometimes, this disease occurs as a result of a new mutation. It has been also demonstrated that it can be caused by germ mosaicisms. This paper documented for the first time in Cuba the case of a family with three (3 individuals of both sexes affected by type-1 osteogenesis imperfecta but their parents were not. The etiological possibilities of germ mosaicism and the possibilities of an inheritance pattern different from the dominant one were discussed, which would give new genetic heterogeneity evidence.

  12. Effects of nitrogen fertilization and nitrification inhibitor product on vegetative growth, production and oil quality in ‘Arbequina’ hedgerow and ‘Picual’ vase-trained orchards; Efectos de la fertilización nitrogenada y del inhibidor de la nitrificación sobre el crecimiento vegetativo, la producción y la calidad del aceite en olivares 'Arbequina' en intensivo y 'Picual' en vaso.

    Centeno, A.; García, J.M.; Gómez-del-Campo, M.

    2017-07-01

    Two experiments were carried out in olive orchards in the center of Spain over a three-year period. In this cold and dry area, growers traditionally apply large amounts of N with no experimental knowledge. An ‘Arbequina’ hedgerow and ‘Picual’ vase orchards were fertilized with two N-doses applied to the soil in spring with or without the nitrification inhibitor (DMPP). Vegetative growth, fruit and oil characteristics were evaluated. These variables were affected by the N-treatment during the 3rd year. The lowest N-application increased vegetative growth, while when N-leaf composition was higher than 2%, fruit dry weight, oil content and oil phenol content were reduced. ‘Picual’ did not respond to N-applications. The effect of DMPP on growth or production was not consistent and a lower phenolic content was obtained for ‘Arbequina’. Our results demonstrated that in this dry land, N-fertilization is not always necessary and oil quality can be negatively affected with high doses. [Spanish] Durante tres años, se llevaron a cabo dos experimentos en olivares del centro de España. En esta fría y seca zona de cultivo, los agricultores aplican grandes cantidades de nitrógeno sin ningún criterio. Un olivar de ‘Arbequina’ en intensivo y otro de ‘Picual’ en vaso se fertilizaron con dos dosis de N aplicado al suelo en primavera con o sin el inhibidor de la nitrificación 3.4 dimethyl phyrazol phosphate (DMPP). El tercer año, el N afectó al crecimiento vegetativo y a las características del fruto y del aceite. La menor dosis de N aplicada, aumentó el crecimiento, pero cuando la composición de N en hoja fue superior al 2%, el peso del fruto, el contenido en aceite y el contenido fenólico se redujeron. ‘Picual’ no respondió al N. El efecto del DMPP en el crecimiento o la producción no fue consistente y afectó negativamente al contenido fenólico del aceite en ‘Arbequina’. Nuestros resultados demuestran que en esta árida zona la

  13. The Hydromechanics of Vegetation for Slope Stabilization

    Mulyono, A.; Subardja, A.; Ekasari, I.; Lailati, M.; Sudirja, R.; Ningrum, W.

    2018-02-01

    Vegetation is one of the alternative technologies in the prevention of shallow landslide prevention that occurs mostly during the rainy season. The application of plant for slope stabilization is known as bioengineering. Knowledge of the vegetative contribution that can be considered in bioengineering was the hydrological and mechanical aspects (hydromechanical). Hydrological effect of the plant on slope stability is to reduce soil water content through transpiration, interception, and evapotranspiration. The mechanical impact of vegetation on slope stability is to stabilize the slope with mechanical reinforcement of soils through roots. Vegetation water consumption varies depending on the age and density, rainfall factors and soil types. Vegetation with high ability to absorb water from the soil and release into the atmosphere through a transpiration process will reduce the pore water stress and increase slope stability, and vegetation with deep root anchoring and strong root binding was potentially more significant to maintain the stability of the slope.

  14. Impuesto sobre las transacciones financieras: Justicia fiscal

    Mariño, José Ramón

    2016-01-01

    7 p.[Variante del título de la publicación : Boletín electrónico de Hegoa] [ESP] El Impuesto sobre las transacciones financieras se basa en establecer un gravamen sobre las operaciones financieras con el fin de estabilizar los mercados como consecuencia de la disminución de la especulación a corto plazo. Además es una fuente de financiación de inversiones socialmente deseables. Diez países de la Unión Europea han expresado su deseo de introducir el ITF, sin emba...

  15. Olhares distintos sobre a noção de estabilidade e mudança no desempenho da coordenação motora grossa Ángulos diferentes sobre el concepto de estabilidad y cambio en el rendimiento de la coordinación motora gruesa Distinct views on the notion of stability and change in the performance of gross motor coordination

    Luciano Basso

    2012-09-01

    Full Text Available Estudos sobre coordenação motora grossa (CMG de crianças focam na descrição dos valores normativos em razão da idade e sexo. Poucos analisam a dinâmica da mudança do desempenho de cada criança em relação ao seu grupo ao longo do tempo. O objetivo do presente estudo foi estimar a estabilidade das diferenças interindividuais na mudança intraindividual da CMG ao longo de 18 meses. Participaram do estudo 120 escolares de sete anos de idade da cidade de Muzambinho - MG. Foram realizadas quatro coletas com intervalos de seis meses. A CMG foi avaliada pelas provas do KTK. Os valores médios apresentaram incrementos em todas as provas, diferindo entre gênero apenas para o equilíbrio à retaguarda. Os resultados da correlação entre o desempenho inicial e a mudança ao longo do tempo indicaram uma forte heterogeneidade. Os resultados da estabilidade se mostraram fracos, os quais foram discutidos em relação a diferentes trajetórias do desenvolvimento da CMG.Las investigaciones sobre la coordinación motora gruesa (GMC de niños se centran en la descripción de los valores normativos basados en la edad y en el sexo, y pocos estudios analizan la dinámica de cambio en el desempeño de cada niño en relación a su grupo al largo del tiempo. El objetivo de este estudio fue estimar la estabilidad de las diferencias interindividuales en el cambio interindividual de la CMG durante dieciocho meses. Participaron de la investigación 120 estudiantes de siete años de edad de la ciudad de Muzambinho - MG. Cuatro muestras fueron tomadas a intervalos de seis meses. La CMG se evaluó mediante las pruebas del KTK. Los valores medios mostraron aumentos en todas las pruebas, defiriendo entre géneros sólo para el equilibrio a la retaguardia. Los resultados de la correlación entre el rendimiento inicial y el cambio a lo largo del tiempo indicaron una fuerte heterogeneidad. Los resultados de la estabilidad se mostraron débiles. Estos resultados se

  16. Wetland vegetation establishment in L-Lake

    Kroeger, S.R.

    1990-07-01

    Wetland vegetation was transplanted from PAR Pond to L-Lake between January and August, 1987. Approximately 100,000 individual plants representing over 40 species were transplanted along the southern shoreline. Three zones of vegetation were created: (1) submersed/floating-leaved, (2) emergent, (3) upper emergent/shrub. During the summers of 1987, 1988, 1989, the Savannah River Ecology Laboratory sampled the vegetation in 54 permanent transects located in planted (N=32) and unplanted areas (N=22). The 1989 vegetation data from L-Lake were compared to 1985 data from PAR Pond

  17. The marsh vegetation of Kleinmond Lagoon

    M. O'Callaghan

    1994-10-01

    Full Text Available The vegetation of Kleinmond Lagoon suggests that this system is in transition from an estuary to a coastal lake. Two major types of vegetation were recognized, one which is subjected to soil and water conditions of marine origin and the other which is subjected to conditions of terrestrial origin. These vegetation types are discussed and compared to the vegetation of other estuarine systems. Artificial manipulations of the mouth seem to have resulted in sediment deposition and a freshening of the system. These unseasonable manipulations also threaten the continued existence of a number of species in the system.

  18. Submersed Aquatic Vegetation Modeling Output Online

    Yin, Yao; Rogala, Jim; Sullivan, John; Rohweder, Jason

    2005-01-01

    .... Predictions for distribution of submerged aquatic vegetation beds can potentially increase hunter observance of voluntary avoidance zones where foraging birds are left alone to feed undisturbed...

  19. Volatilization of iodine from vegetation

    Amiro, B.D.; Johnston, F.L.

    1989-01-01

    Gaseous emissions of iodine were measured from bean plant foliage. A gamma-emitting iodine tracer, Na 125 I, was taken up by the plants from a hydroponic growth medium and released to a cuvette atmosphere. The dynamics of the flux were studied using a flow-through gamma detector. The relationship between leaf radioactive tracer activity and growth-medium activity was linear, as was the relationship between the iodine flux and both leaf and growth-medium activity. Iodine flux and leaf conductance to water responded similarly to changes in light levels, suggesting that the stomata may partially control the flux. The flux was inhibited by aeration of the hydroponic growth media, and we postulate that methylation causes the iodine flux. Iodine emissions from living vegetation probably contribute < 0.1% to the stable iodine concentration in the atmosphere above terrestrial areas. However, this pathway may be a direct route for radioactive iodine transport from contaminated soils to the atmosphere. (author)

  20. Revisão sistemática sobre a epidemiologia das doenças cardiovasculares e respiratórias e suas associações com a poluição do ar em Vitória/ES

    Sergio Tufik

    2017-07-01

    Full Text Available Introdução: A poluição do ar é um importante fator ambiental relacionado a doenças crônicas não transmissíveis, como doenças cardiovasculares e respiratórias. Essa relação torna-se importante em cidades com alta atividade industrial, como Vitória/ES. Esta pesquisa utilizou três revisões sistemáticas (RSs distintas para avaliar a epidemiologia das doenças cardiovasculares (RS1, a epidemiologia das doenças respiratórias (RS2 e a associação entre poluição do ar e doenças cardiorrespiratórias (RS3 na cidade de Vitória. Métodos: A busca bibliográfica considerou três bases de dados (PubMed, Scopus e LILACS. Foi estabelecida uma quantidade mínima de três estudos para a condução de metanálises. A heterogeneidade de cada análise foi calculada pelo índice I2 . Resultados: A busca bibliográfica resultou em 1.205 registros, dos quais 27 foram incluídos – 17 na RS1, cinco na RS2 e cinco na RS3. Apenas dois desfechos puderam ser avaliados por meio de metanálises: prevalência de hipertensão e prevalência de asma em crianças. Estima-se uma prevalência de 34% (IC95%: 24-45 de hipertensão e de 12% (IC95%: 1-32 de asma em crianças. Os poluentes mais avaliados foram MP10 e SO2 , para os quais não se pôde realizar metanálises. Todas as análises apresentaram baixo número de registros incluídos e alta heterogeneidade. Conclusão: Há poucos dados disponíveis sobre a associação de doenças cardiorrespiratórias e poluição ambiental em Vitória. A heterogeneidade, a diversidade de desfechos e a baixa quantidade de estudos impediram a condução de análises mais profundas e limitaram o poder de síntese e conclusão dessas revisões, impossibilitando uma avaliação adequada dos objetivos propostos. São necessários mais estudos epidemiológicos com amostras de grande porte e representativas para que se tenha resultados conclusivos sobre a relação entre poluição ambiental e doenças cardiorrespirat

  1. Children and vegetables: strategies to increase children’s liking and intake of vegetables

    Wild, de V.W.T.

    2015-01-01

    Background and aim

    Children’s vegetable intake is far below that recommended. Despite increased awareness of the importance of vegetable consumption for health, it remains challenging to improve children’s vegetable intake. Since food preferences are central to

  2. Add More Vegetables to Your Day: 10 Tips to Help You Eat More Vegetables

    ... sip on some vegetable soup Heat it and eat it. Try tomato, butternut squash, or garden vegetable soup. Look for reduced- or low-sodium soups. Make your own soups with a low-sodium broth and your favorite vegetables. 8 while you’re out If dinner is away from home, no need to worry. ...

  3. Effects of Telecoupling on Global Vegetation Dynamics

    Viña, A.; Liu, J.

    2016-12-01

    With the ever increasing trend in telecoupling processes, such as international trade, all countries around the world are becoming more interdependent. However, the effects of this growing interdependence on vegetation (e.g., shifts in the geographic extent and distribution) remain unknown even though vegetation dynamics are crucially important for food production, carbon sequestration, provision of other ecosystem services, and biodiversity conservation. In this study we evaluate the effects of international trade on the spatio-temporal trajectories of vegetation at national and global scales, using vegetation index imagery collected over more than three decades by the Advanced Very High Resolution Radiometer (AVHRR) satellite sensor series together with concurrent national and international data on international trade (and its associated movement of people, goods, services and information). The spatio-temporal trajectories of vegetation are obtained using the scale of fluctuation technique, which is based on the decomposition of the AVHRR image time series to obtain information on its spatial dependence structure over time. Similar to the correlation length, the scale of fluctuation corresponds to the range over which fluctuations in the vegetation index are spatially correlated. Results indicate that global vegetation has changed drastically over the last three decades. These changes are not uniform across space, with hotspots in active trading countries. This study not only has direct implications for understanding global vegetation dynamics, but also sheds important insights on the complexity of human-nature interactions across telecoupled systems.

  4. Spectrophotometric Determination of Nitrate in Vegetables Using ...

    DR. MIKE HORSFALL

    ABSTRACT: A rapid and sensitive spectrophotometric method for the determination of nitrate in vegetables is described. The method is based on the measurement of the absorbance of yellow sodium nitrophenoxide formed via the reaction of phenol with the vegetable-based nitrate in presence of sulphuric acid.

  5. Man-influenced vegetation of North Korea

    Kolbek, Jiří; Jarolímek, I.

    2008-01-01

    Roč. 40, č. 1 (2008), s. 381-404 ISSN 0253-116X R&D Projects: GA ČR(CZ) GA206/05/0119 Institutional research plan: CEZ:AV0Z60050516 Keywords : vegetation classification * weed communities * man-depending vegetation Subject RIV: EF - Botanics

  6. Technical efficiency of irrigated vegetable production among ...

    This study was carried out to analyse the technical efficiency of irrigated vegetable production among smallholder farmers in the guinea savannah, Nigeria, and determine the cost and returns on irrigated vegetable production. Two-stage sampling technique was used, purposive selection of two states and three Local ...

  7. Measurement Of Technical Efficiency In Irrigated Vegetable ...

    This study measured technical efficiency and identified its determinants in irrigated vegetable production in Nasarawa State of Nigeria using a stochastic frontier model. A complete enumeration of 193 NADP-registered vegetable farmers was done. The predicted farm technical efficiency ranges from 25.94 to 96.24 per cent ...

  8. Gelation and interfacial behaviour of vegetable proteins

    Vliet, T. van; Martin, A.H.; Bos, M.A.

    2002-01-01

    Recent studies on gelation and interfacial properties of vegetable protiens are reviewed. Attention is focused on legume proteins, mainly soy proteins, and on wheat proteins. The rheological properteis of vegetable protein gels as a function of heating time or temperature is discussed as well as the

  9. Gelation and interfacial behaviour of vegetable proteins

    Vliet, van T.; Martin, A.H.; Bos, M.A.

    2002-01-01

    Recent studies on gelation and interfacial properties of vegetable proteins are reviewed. Attention is focused on legume proteins, mainly soy proteins, and on wheat proteins. The rheological properties of vegetable protein gels as a function of heating time or temperature is discussed as well as the

  10. Food design strategies to increase vegetable intake

    Oliviero, Teresa; Fogliano, Vincenzo

    2016-01-01

    Background: Public campaigns promoting consumption of fruits and vegetables had limited results as consumers habits are difficult to modify. The incorporation of fruits and vegetables into regularly eaten products is a food design strategy that leads to several advantages. Pasta is a staple food

  11. STOVE: Seed treatments for organic vegetable production

    Schmitt, A.; Jahn, M.; Kromphardt, C.; Krauthausen, H.J.; Roberts, S.J.; Wright, S.A.I.; Amein, T.; Forsberg, G.; Tinivella, F.; Gullino, M.L.; Wikström, M.; Wolf, van der J.M.; Groot, S.P.C.; Werner, S.; Koch, E.

    2008-01-01

    The aim of the EU-financed research project „STOVE“ (Seed Treatments for Organic Vegetable Production) is to evaluate different methods potentially suited for seed treatment of vegetables in organic farming regarding their efficacy, to optimise these methods, and where feasible to combine them with

  12. Natural Vegetation of the Flora area

    Sebsebe, Demissew; Friis, Ib

    2009-01-01

    A review article summarising the recent ideas about the natural vegetation in the area covered by the Flora of Ethiopia and Eritrea......A review article summarising the recent ideas about the natural vegetation in the area covered by the Flora of Ethiopia and Eritrea...

  13. Atlas of the potential vegetation of Ethiopia

    Friis, Ib; Demissew, Sebsebe; van Breugel, Paulo

    Based on many years of field work by the two senior authors (Ib Friis and Sebsebe Demissew) and with the application of GIS analyses (by P. van Breugel) 15 major vegetation types in Ethiopia are described and mapped. The book descibes the structure and floristic composition of the vegetation types...

  14. Use of Plastic Mulch for Vegetable Production

    Maughan, Tiffany; Drost, Dan

    2016-01-01

    Plastic mulches are used commercially for both vegetables and small fruit crops. Vegetable crops well suited for production with plastic mulch are typically high value row crops. This fact sheet describes the advantages, disadvantages, installation, and planting considerations. It includes sources for plastic and equipment.

  15. Classification and mapping of rangeland vegetation physiognomic ...

    Plot vegetation species growth form, cover and height data were collected from 450 sampling sites based on eight spectral strata generated using unsupervised image classification. Field data were grouped at four levels of seven, six, three and two vegetation physiognomic classes which were subjected to both ML and ...

  16. Effects of aquatic vegetation type on denitrification

    Veraart, A.J.; Bruijne, de W.J.J.; Peeters, E.T.H.M.; Klein, de J.J.M.; Scheffer, M.

    2011-01-01

    In a microcosm 15N enrichment experiment we tested the effect of floating vegetation (Lemna sp.) and submerged vegetation (Elodea nuttallii) on denitrification rates, and compared it to systems without macrophytes. Oxygen concentration, and thus photosynthesis, plays an important role in regulating

  17. Role of vegetation on river bank accretion

    Vargas Luna, A.

    2016-01-01

    There is rising awareness of the need to include the effects of vegetation in studies dealing with the morphological response of rivers. Vegetation growth on river banks and floodplains alters the river bed topography, reduces the bank erosion rates and enhances the development of new floodplains

  18. Weed Identification and Control in Vegetable Crops.

    Ferretti, Peter A., Comp.

    This agriculture extension service publication from Pennsylvania State University examines weed control and identification in vegetable crops. Contents include: (1) Types of weeds; (2) Reducing losses caused by weeds, general control methods and home garden weed control; (3) How herbicides are used; (4) Specific weeds in vegetable plantings; and…

  19. Radiation processing of foods: fruits and vegetables

    Thomas, Paul

    1990-01-01

    Post-harvest irradiation of fruits and vegetables improves their shelf-life by: (1) delaying ripening and senescence of fruits, (2) controlling fungal diseases, (3) inhibiting sprouting, and (4) disinfestation. Nutritional and quality aspects of irradiated fruits and vegetables are discussed. Commercial prospects are briefly described. (M.G.B.)

  20. El Estado líquido: discusiones sobre la volatilidad de las políticas públicas y evidencias de Argentina y Brasil (1995-2006

    Luciana CINGOLANI

    2010-05-01

    Full Text Available RESUMEN: El artículo se propone ofrecer un análisis integral sobre la manera en que ha sido abordada la cuestión de la inestabilidad de las políticas públicas: su impacto en el desarrollo económico de los países, la heterogeneidad de enfoques teóricos que la estudian, las maneras en que ha sido conceptualizada y las posibles causas que la literatura ha delineado explicando el fenómeno. Ofrece asimismo un diagnóstico sobre los niveles de inestabilidad de las políticas en Argentina y Brasil entre los años 1995 y 2006 y discute brevemente algunas previsiones de la teoría a la luz de los resultados observados. Estos resultados arrojan una serie de conclusiones: a hay un nivel sustancialmente más alto de inestabilidad de las políticas en Argentina que en Brasil; b hay una desproporción entre la importancia del concepto como determinante del desarrollo y su sistematización como variable independiente, y c se produce una serie de contradicciones entre diferentes corrientes neoinstitucionales, y entre algunas de estas teorías y la evidencia empírica. ABSTRACT: The article aims to present a comprehensive analysis of different aspects concerning the concept of policy instability: its impacts on economic development, the multiple and hetereogeneus theoretical approaches that address it, the construction of its definition and the possible causes behind it. It also offers a diagnosis of policy instability levels in Argentina and Brazil between 1995 and 2006, and discusses some of the theoretical previsions in light of the evidence found. The general findings suggest that: a there is a significantly higher level of policy instability in Argentina than in Brazil, b there is a mismatch between the importance of policy stability as a determinant of development and its systematization as independent variable, and c a series of contradictions can be found between different rational choice neoinstitutionalist theories, and between some of these

  1. Dinâmica vegetacional em pastagem natural e pastagem sobre-semeada com espécies de estação fria com e sem o uso de herbicida - doi: 10.4025/actascianimsci.v33i2.9148 Vegetation dynamics in natural pasture and pasture overseeded with cool season species with and without the use of herbicide - doi: 10.4025/actascianimsci.v33i2.9148

    Duilio Guerra Bandinelli

    2011-04-01

    Full Text Available Objetivou-se avaliar os possíveis efeitos do uso do herbicida e da introdução de espécies de estação fria na dinâmica vegetacional da pastagem natural. Os tratamentos foram: pastagem natural com roçadas anuais (CN; pastagem natural melhorada com introdução de espécies de estação fria e com adubação anual (CNI; idem ao anterior, mas com uma aplicação de glifosato (G1; idem ao anterior, porém com três aplicações de glifosato (G3; idem ao G3, mas com o dobro da adubação anual (GA3. A semeadura de trevo branco, cornichão e azevém anual foi feita a lanço, sendo esta precedida da aplicação do herbicida glifosato. O sistema de pastejo foi o contínuo com lotação variável. A composição botânica observada foi diferente (p This study evaluated the possible effects of the use of herbicide and introduction of cool season species on the dynamics of natural grassland vegetation. The treatments were: natural grassland with annual mowing (CN; natural grassland improved with introduction of cool season species and annual fertilization (CNI; same as the previous but with glyphosate application (G1; same as the previous with three glyphosate applications (G3; same as G3 but with double annual fertilizing (GA3. The sod seeding of white clover, birdsfoot trefoil and annual ryegrass was preceded by application of the herbicide glyphosate. The grazing system was continuous, with variable stocking rates. The observed botanical composition was different (p < 0.06 between treatments that did not receive glyphosate application and those with application. The botanical composition of the treatments did not present variation (p = 0.57 among periods. The use of glyphosate allows an efficient establishment of the introduced species. However, the use of this practice is not recommended due to its effects on modifying the floristic composition of the natural grassland.

  2. Radionuclide interception and loss processes in vegetation

    Proehl, G.; Hoffman, F.O.

    1996-01-01

    Data available since the Chernobyl accident have strengthened the view that the transfer of radionuclides from air to vegetation is a primary area of uncertainty in the estimation of the contamination of food chains leading to human exposure. The processes affecting the overall transfer from air to vegetation involve wet and dry deposition, interception and initial retention, and post-deposition retention of radioactive substances by vegetation. During the growing season, the time-integrated concentrations of radionuclides on vegetation in the first few months after initial deposition are dominated by the direct foliar interception of deposited material. Chapter 2 contains a review of data for modelling the direct foliar interception and initial retention of radioactivity deposited by dry and wet processes, together with data on the factors affecting post-deposition retention of radioactivity on the vegetation. 82 refs, 9 figs, 11 tabs

  3. Post Fire Vegetation Recovery in Portugal

    Gouveia, Celia; Bastos, Ana; DaCamara, Carlos; Trigo, Ricardo M.

    2011-01-01

    Fires in Portugal, as in the Mediterranean ecosystems, have a complex effect on vegetation regeneration due to the different responses of vegetation to the variety of fire regimes and to the complexity of landscape structures. A thorough evaluation of vegetation recovery after fire events becomes therefore crucial in land management. In 2005, Portugal suffered a strong damage from forest fires that damaged an area of 300 000 ha of forest and shrub. This year are particularly interesting because it is associated the severe drought of 2005. The aim of the present study is to identify large burnt scars in Portugal during the 2005 fire seasons and monitoring vegetation behaviour throughout the pre and the post fire periods. The mono-parametric model developed by Gouveia et al. (2010), based on monthly values of NDVI, at the 1km×1km spatial scale, as obtained from the VEGETATION-SPOT5 instrument, from 1999 to 2009, was used.

  4. Vegetable oil spills : oil properties and behaviour

    Fingas, M.; Fieldhouse, B.; Jokuty, P.

    2001-01-01

    In 1997, the United States Environmental Protection Agency conducted a thorough review of the issue regarding vegetable oil spills. Recent attention has refocused on this issue as a result of an incident where 20 tons of canola oil was spilled in the Vancouver Harbour in 2000. In the past, vegetable oils were suggested to be a useful test material because they were thought to be innocuous. It was even suggested they be used to remove petroleum oil residues from beaches. However, recent studies have shown that spills of vegetable oils can have major environmental consequences, equivalent to those of petroleum oil spills. The spills have devastating effects on birds and intertidal organisms. This paper presented a summary of historical vegetable spills from around the world. In this study, specific behaviour tests were examined for several oils including canola, soy bean, olive, castor and corn oils. Evaporation, water-in-oil emulsification and chemical dispersion were measured and were found to be nearly zero, suggesting that vegetable oil spills are not very soluble in water. The aquatic toxicity of vegetable oil is low, but their fate is quite different from petroleum. Vegetable oils do not evaporate to a significant degree, they do not form water-in-oil emulsions, nor do they disperse in water. The physical properties of vegetable oils were also measured, including density and viscosity. This paper presented the aquatic toxicity of several vegetable oils along with other environmental data including the degradation rates noted in the literature. Most environmental damage reported in the literature is by contact with birds feathers resulting in hypothermia and secondly by smothering of intertidal organisms. The effect of vegetable oil on fish has not been well studied, but it is expected that there will be little destructive effect except where smothering can occur. 35 refs., 3 tabs

  5. Vegetable oil spills : oil properties and behaviour

    Fingas, M.; Fieldhouse, B.; Jokuty, P. [Environment Canada, Ottawa, ON (Canada). Emergencies Science Div

    2001-07-01

    In 1997, the United States Environmental Protection Agency conducted a thorough review of the issue regarding vegetable oil spills. Recent attention has refocused on this issue as a result of an incident where 20 tons of canola oil was spilled in the Vancouver Harbour in 2000. In the past, vegetable oils were suggested to be a useful test material because they were thought to be innocuous. It was even suggested they be used to remove petroleum oil residues from beaches. However, recent studies have shown that spills of vegetable oils can have major environmental consequences, equivalent to those of petroleum oil spills. The spills have devastating effects on birds and intertidal organisms. This paper presented a summary of historical vegetable spills from around the world. In this study, specific behaviour tests were examined for several oils including canola, soy bean, olive, castor and corn oils. Evaporation, water-in-oil emulsification and chemical dispersion were measured and were found to be nearly zero, suggesting that vegetable oil spills are not very soluble in water. The aquatic toxicity of vegetable oil is low, but their fate is quite different from petroleum. Vegetable oils do not evaporate to a significant degree, they do not form water-in-oil emulsions, nor do they disperse in water. The physical properties of vegetable oils were also measured, including density and viscosity. This paper presented the aquatic toxicity of several vegetable oils along with other environmental data including the degradation rates noted in the literature. Most environmental damage reported in the literature is by contact with birds feathers resulting in hypothermia and secondly by smothering of intertidal organisms. The effect of vegetable oil on fish has not been well studied, but it is expected that there will be little destructive effect except where smothering can occur. 35 refs., 3 tabs.

  6. Consideraciones sobre la produccion de frutas en Venezuela

    Jesús Aular

    2011-10-01

    Full Text Available En la presente revisión se presenta información sobre superficie, producción, y rendimiento de los frutales en Venezuela. Además se hacen consideraciones sobre los sistemas de producción, destacando limitaciones, avances y sugerencias. La fruticultura en Venezuela ocupa el 3er. lugar dentro del sector agrícola vegetal. Existen 167.691 Ha de frutales y una producción 2.232.088 TM por año. Se producen comercialmente una docena de rubros frutícolas, siendo los principales: plátano, banano, naranjo y piña. Las áreas de producción van desde zonas bajas y áridas, en donde se obtienen uvas y piñas; hasta zonas altas y húmedas donde se hallan duraznos y fresas. Ha habido reducción de la superficie plantada, con excepción de lechosa, piña y aguacate. El manejo hortícola de los huertos frutícolas es heterogéneo, ya que se observa desde bajo hasta alto nivel de tecnología. La incorrecta aplicación de las prácticas hortícolas origina baja productividad y calidad de fruta. La poscosecha podría mejorarse a través del desarrollo e implementación de normas de clasificación, empaque, embalaje, y cadena de frío. La exportación de frutas venezolanas se ha reducido en los últimos años y se concentra en mango, naranja y lima Tahití. Los principales destinos son Colombia, Europa, Norteamérica y las islas del Caribe. Sólo la naranja se procesa de manera importante en Venezuela. Las perspectivas para la fruticultura venezolana es continuar como una actividad dirigida al mercado interno, no se vislumbra una mayor participación del país en el mercado internacional.

  7. Avaliaçao do efeito do extrato de casca de cajueiro-branco (Anacardium occidentale L. Sobre A infecção por Leishmania (Viannia brasiliensis

    Flávio França

    1993-09-01

    Full Text Available Este trabalho apresenta uma avaliação do efeito terapêutico do extrato hidroalcólico da casca de Anacardium occidentale L sobre a Leishmania (Viannia brasiliensis. No modelo in vitro o extrato vegetal mostrou-se ativo contra promastigotas do parasita, contrastando com o modelo in vivo, onde não se observou qualquer atividade curativa.

  8. Estudo das curvas de crescimento de cordeiros das raças santa inês e bergamácia considerando heterogeneidade de variâncias Growth functions of Santa Inês and Bergamacy lambs considering heteroscedastic variance

    Marlon Henrique Paiva Guedes

    2004-04-01

    Full Text Available Funções de crescimento não-lineares foram ajustados a dados de peso-idade de 40 cordeiros das raças Santa Inês e Bergamácia. Pelos testes de Hartley e de Bartlett, verificou-se que os dados apresentavam heterogeneidade de variâncias; em função disso, ajustaram-se as funções de crescimento pelo método dos quadrados mínimos ponderado pelo inverso da variância dos pesos a cada pesagem utilizando a opção WEIGTH do PROC MODEL (SAS INSTITUTE, 1996. As funções de crescimento foram comparadas pela interpretação biológica dos parâmetros e pelos indicadores de qualidade do ajuste (coeficiente de determinação ajustado, quadrado médio do resíduo e teste de Durbin-Watson. As funções de von Bertalanffy e Gompertz apresentaram a melhor qualidade de ajuste, ao passo que as funções de Richards, Logística e Brody não se mostraram adequadas para descrever o crescimento dos animais por apresentarem estimativas não condizentes com a realidade.Non linear growth functions were fitted to weight-age data of 40 Santa Inês and Bergamacy lambs. The Hartley and Bartlett tests indicated that the data presented heteroscedastic variance, so the growth functions were fitted through weighted minimum square method by the inverse variance weight in each sampler using the WEIGHT option in PROC MODEL (SAS INSTITUTE, 1996. The functions were compared using the biological interpretation of the parameters and the quality indicators of fit (adjusted determination coefficient, mean square error and Durbin-Watson test. The von Bertalanffy and Gompertz functions provided the best fittings, whereas Richards, Logistic and Brody functions turned out not to be suitable for describing growth behavior, became estimates based on them do not agree with observation.

  9. Formation of banded vegetation patterns resulted from interactions between sediment deposition and vegetation growth.

    Huang, Tousheng; Zhang, Huayong; Dai, Liming; Cong, Xuebing; Ma, Shengnan

    2018-03-01

    This research investigates the formation of banded vegetation patterns on hillslopes affected by interactions between sediment deposition and vegetation growth. The following two perspectives in the formation of these patterns are taken into consideration: (a) increased sediment deposition from plant interception, and (b) reduced plant biomass caused by sediment accumulation. A spatial model is proposed to describe how the interactions between sediment deposition and vegetation growth promote self-organization of banded vegetation patterns. Based on theoretical and numerical analyses of the proposed spatial model, vegetation bands can result from a Turing instability mechanism. The banded vegetation patterns obtained in this research resemble patterns reported in the literature. Moreover, measured by sediment dynamics, the variation of hillslope landform can be described. The model predicts how treads on hillslopes evolve with the banded patterns. Thus, we provide a quantitative interpretation for coevolution of vegetation patterns and landforms under effects of sediment redistribution. Copyright © 2018. Published by Elsevier Masson SAS.

  10. Volatilization of iodine from vegetation

    Amiro, B D; Johnston, F L [Atomic Energy of Canada Ltd., Pinawa, MB (Canada). Whiteshell Nuclear Research Establishment

    1989-01-01

    Gaseous emissions of iodine were measured from bean plant foliage. A gamma-emitting iodine tracer, Na {sup 125}I, was taken up by the plants from a hydroponic growth medium and released to a cuvette atmosphere. The dynamics of the flux were studied using a flow-through gamma detector. The relationship between leaf radioactive tracer activity and growth-medium activity was linear, as was the relationship between the iodine flux and both leaf and growth-medium activity. Iodine flux and leaf conductance to water responded similarly to changes in light levels, suggesting that the stomata may partially control the flux. The flux was inhibited by aeration of the hydroponic growth media, and we postulate that methylation causes the iodine flux. Iodine emissions from living vegetation probably contribute < 0.1% to the stable iodine concentration in the atmosphere above terrestrial areas. However, this pathway may be a direct route for radioactive iodine transport from contaminated soils to the atmosphere. (author).

  11. Efectos del consumo de ácidos grasos omega-3 sobre la salud cardiovascular, cerebral y diversas enfermedades del sistema nervioso central

    Elba Cubero Castillo

    2016-10-01

    Full Text Available Se realizó una revisión de los trabajos publicados sobre los efectos del consumo de ácidos grasos omega-3, (ácido alfa-linolénico (AAL, ácido docosahexaenoico (ADH y ácido eicosapentaenoico (AEP sobre la salud de las personas en diferentes periodos de la vida. Se discuten los beneficios obtenidos en el ámbito de la salud sobre los sistemas circulatorio y nervioso. Se mencionan diferentes fuentes alimenticias de origen animal y vegetal en las que se encuentran disponibles los ácidos grasos omega-3, especialmente ADH y AEP. Se encontró que muchos de los tratamientos actuales de trastornos del sistema nervioso y de problemas cognitivos involucran el consumo de ácidos grasos omega-3, dando resultados positivos en diversos cuadros clínicos.

  12. Efeito do tipo de substrato e da presença de adubação suplementar sobre o crescimento vegetativo, nutrição mineral, custo de produção e intensidade de cercosporiose em mudas de cafeeiro formadas em tubetes Effects of substrate type and supplementary fertilization on vegetative growth, mineral nutrition, production costs, and brown eye spot of coffee seedlings in stiff plastic containers

    Adélia Aziz Alexandre Pozza

    2007-06-01

    Full Text Available A utilização de tubetes para produzir mudas de cafeeiro (Coffea arabica L. tornou-se uma realidade. Objetivando avaliar o uso de substratos adubados ou não com fertilizante de liberação gradual e seus efeitos na nutrição, na formação, na cercosporiose e nos custos de produção de mudas de cafeeiro em tubetes, conduziu-se um experimento em viveiro, em esquema fatorial (4x2 com quatro substratos combinados com duas adubações, tendo quatro repetições. As parcelas foram constituídas por 16 tubetes de 120 mL, considerando-se como plantas úteis as seis centrais. Os tratamentos consistiram dos substratos S1= Substrato comercial I, S2 = Substrato comercial II, S3 = Substrato de eucalipto e S4 = 80% esterco de curral + 20% terra de subsolo, todos com e sem adubação com fertilizante de liberação gradual. No geral, os melhores substratos para formação de mudas de cafeeiro em tubetes foram os substratos não comerciais ou orgânicos, independentemente de receberem ou não adubação suplementar. Observou-se redução da cercosporiose com a nutrição mineral, principalmente com o cálcio. Com a utilização de todos os substratos houve ganho econômico em relação ao custo por milheiro de mudas. A maior economia foi obtida com o substrato S4, seguida do substrato S3, com melhor relação custo/benefício.The utilization of stiff plastic containers for producing coffee seedlings (Coffea arabica L. is a reality. Aiming to evaluate the effects of substrate type enriched or not with slow-release fertilizer on vegetative growth, mineral nutrition, production cost and, brown eye spot of coffee seedlings, an experiment was conducted in the plant nursery. The experimental design was a factorial scheme with four substrates in the presence and absence of supplementary fertilization, with four replicates. The plots were made of 16 containers of 120 ml, using six central plants for evaluation. The treatments consisted of S1 = Commercial Substrate

  13. Investigación educativa reciente sobre México

    Núñez-DelaPeña, Francisco J.; Mejía-Arauz, Rebeca

    1985-01-01

    Se presenta una muestra de la investigación educativa sobre México: 22 disertaciones doctorales aceptadas en universidades norteamericanas entre 1982 y 1984. Dos estudios conciernen a la teoría del capital humano; cinco tratan diversos aspectos relacionados con la administración educativa; uno es sobre la televisión; otro sobre las habilidades fonéticas de los niños; uno más es sobre profesionalización de los médicos; cuatro tocan aspectos de política educativa; tres tratan sobre los maestros...

  14. Perspectiva dos pais sobre educação e castigo físico Perspectiva de los padres sobre educación y castigo físico Parent's perspective on child rearing and corporal punishment

    Miguir Terezinha Vieccelli Donoso

    2009-02-01

    Full Text Available OBJETIVO: Descrever a percepção dos pais acerca do castigo físico, considerando-se o significado da educação e punição física, e formas de educar. PROCEDIMENTOS METODOLÓGICOS: Foram abordados 31 familiares, estando 12 sob tutela por denúncia de maus-tratos e 19 não tutelados em unidade básica de saúde e na secretaria de Assistência Social de Belo Horizonte (MG em 2006. Procedeu-se à análise de discurso dos relatos obtidos por meio de entrevistas semi-estruturadas. Os dados foram organizados em temas e categorias. ANÁLISE DO DISCURSO: Os resultados apontaram a restrição dos discursos dos entrevistados em função das suas condições de produção. Houve diversidade de concepções sobre educação e formas de educar, tendo como pontos comuns o relato da prática da punição física por todos os pais, mesmo entre aqueles que a condenam. Os discursos foram marcados pela heterogeneidade e polifonia, sobressaindo-se o discurso da tradição, o discurso religioso e o discurso científico popularizado. Não foi observada expressão do conceito de interdição legal da prática ou dos seus excessos pelos participantes. CONCLUSÕES: A cultura do castigo físico encontra-se em transição, em que a tradição de permissão se enfraquece e a interdição se inicia lentamente. Reforço ações de repressão legal à prática poderia contribuir para acelerar o processo de interdição do castigo físico.OBJETIVO: Describir la percepción de los padres acerca del castigo físico, considerándose el significado de la educación y punición física, y formas de educar. PROCEDIMIENTOS METODOLÓGICOS: Fueron abordados 31 familiares, estando 12 bajo la tutela por denuncia de malos tratos y 19 no tutelados en unidad básica de salud y en la secretaria de Asistencia Social de Belo Horizonte (Sureste de Brasil en 2006. Se procedió al análisis de discurso de los relatos obtenidos por medio de entrevistas semi-estructuradas. Los datos fueron

  15. Transfer of 137Cs to wild vegetables

    Ito, Nobuhiko; Natsuhori, Masahiro; Mezawa, Akane; Kawakami, Akira

    1998-01-01

    For the evaluation of internal radiation dose, it is needed to estimate the amount of radionuclide incorporated to human body using a simulation model. 137 Cesium (Cs) is easily transferred associating with food intake as well as potassium and so, Cs is an important nuclide for evaluation of internal radiation. 137 Cs concentrations in wild vegetables are higher than those of cultured vegetables and milk. Therefore, the transfer coefficients of 137 Cs from soil to wild vegetables were estimated in this study. Wild vegetables and soils of their farms were collected in the Hakkoda Mountain range of Aomori Prefecture. The levels of 137 Cs in wild vegetables were 0.42-18.35 (Bq/kg), whereas those in cabbage and spinach were 0.08 and 0.01 (Bq/kg), respectively, indicating that the Cs level is dozens to several hundreds times higher in wild vegetables than cultured ones. And the transfer coefficient was estimated as 0.003-0.94 for the former and 0.001-0.8 for the latter. On the other hand, 1 37 Cs levels of the soils on which wild vegetables grew was 28.0 Bq/kg and it was 3.9 Bq/kg for the farm soil. Furthermore, the effects of water content and pH of the soil on the transfer coefficient were studied. (M.N.)

  16. Plant physiological ecology and the global changes Ecofisiologia vegetal e as mudanças globais

    João Paulo Rodrigues Alves Delfino Barbosa

    2012-06-01

    Full Text Available The global changes are marked by alteration on the normal patterns of important biochemical and biophysical processes of the Earth. However, the real effects as well as the feedbacks of the global changes over vegetation are still unclear. Part of this uncertainty can be attributed to the inattention of stakeholders and scientists towards vegetation and its complex interrelations with the environment, which drive plant physiological processes in different space-time scales. Notwithstanding, some key subjects of the global changes could be better elucidated with a more plant physiological ecology approach. We discuss some issues related to this topic, going through some limitations of approaching vegetation as a static component of the biosphere as the other sub-systems of the Earth-system change. With this perspective, this review is an initial reflection towards the assessment of the role and place of vegetation structure and function in the global changes context. We reviewed the Earth-system and global changes terminology; attempted to illustrate key plant physiological ecology researches themes in the global changes context; consider approaching plants as complex systems in order to adequately quantify systems characteristics as sensibility, homeostasis, and vulnerability. Moreover, we propose insights that would allow vegetation studies and scaling procedures in the context of the Earth-system. We hope this review will assist researchers on their strategy to identify, understand and anticipate the potential effects of global changes over the most vulnerable vegetation processes from the leaf to the global levels.As mudanças globais englobam importantes alterações nos padrões normais de processos bioquímicos e biofísicos da Terra. Os reais efeitos e retroalimentações das mudanças globais sobre a vegetação ainda são incertos. Parte das incertezas pode ser atribuída à falta de atenção de cientistas e políticos para a vegeta

  17. Karoo biome: a preliminary synthesis. Part 2 - vegetation and history

    Cowling, RM

    1987-01-01

    Full Text Available and soil erosion. The focus of this volume is vegetation and its history. Included are chapters on vegetation physiognomy, plant growth, vegetation change, phytogeography, palaeo-ecology, palaeontology and archaeology...

  18. Nigerian women reap benefits from indigenous vegetables | IDRC ...

    2016-06-06

    Jun 6, 2016 ... Demand for fresh indigenous vegetables in Nigeria has increased ... greater returns from indigenous vegetables compared to conventional vegetables. ... In Kolli Hills, Tamil Nadu, monocropping of a single, non-edible variety ...

  19. Formalized classification of European fen vegetation at the alliance level

    Peterka, Tomáš; Hájek, Michal; Jiroušek, Martin

    2017-01-01

    Aims Phytosociological classification of fen vegetation (Scheuchzerio palustris-Caricetea fuscae class) differs among European countries. Here we propose a unified vegetation classification of European fens at the alliance level, provide unequivocal assignment rules for individual vegetation plot...

  20. Sobre una Rodoficea parasita de Gelidiaceas

    Seoane Camba, Juan Antonio

    1982-01-01

    En este trabajo se hace un estudio de una Rodofícea parásita, encontrada sobre Gelidium cantabricum Seoane-Camba y Gelidium sesquipedale (Clemente) Thuret. Por sus características generales atribuímos esta planta al género Gelidiocolax. descrito por Gardner en 1927 para un parásito de Gelidium pulchrum Gardner de las costas americanas del Pacífico...

  1. Reflexiones sobre el concepto de justicia

    Víctor C. Pascual Planchuelo

    2005-06-01

    Full Text Available Este ensayo constituye una reflexión sobre el concepto de Justicia. No se centra, como tantos estudios al respecto, en el plano teórico y metafísico, sino que atiende problemas de mayor actualidad: la opinión de los ciudadanos, la postura de los profesionales y otros asuntos controvertidos del ámbito del Derecho.

  2. Determination of zinc contents in vegetables

    Salah-ud-Din; Salariya, A.M.; Yasin, M.

    1996-01-01

    Zinc content of three groups of vegetables (roots and tuber, leaves and fruits) collected from local markets was determined and are reported here. The determination was made by Atomic Absorption Spectrophotometer. The results obtained show that the zinc content of different vegetables ranged from 6.26-36.80 ppm, 8.80-70-70 ppm and 7.20-35.10 ppm for roots and tubers, fruits of vegetables respectively on dry weight basis. Generally, the values obtained in majority are not above, the maximum permissible limits. (author)

  3. [Allelopathy of Andrographis paniculata vegetative].

    Li, Ming; Zhou, Xiao-Yan; Lu, Zhan-Hong

    2010-12-01

    Andrographis paniculata at vegetative stage were analyzed for the allelopathic effect on cabbage (Brassica chinensis), Radis (Raphanus sativus), and Desmodium styracifolium, and provided the theory reference for their application of compounding planting pattern in practice. Water extracts of Andrographis paniculata root, stem and leaf were used to dispose Brassica chinensis, Raphanus sativus and Desmodium styracifolium seeds, young seedlings. There were allelopathic effect of water extracts of Andrographis paniculata on seed germination of Brassica chinensis, Raphanus sativus and Desmodium styracifolium, but there were difference on allelopathic effect. The suppression effects of roots on seed germination rates of Brassica chinensis showed more significantly, the stems and leaves of Andrographis paniculata on the allelopathic effects on Brassica chinensis seed germination rate index was also significantly higher than the other two receptors plants. Under the treating condition of root, stem and leaf aqueous extracts of Andrographis paniculata, the root growth of receptors seeding mostly showed inhibition effect. Under low concentrations treated. The effects on the seedlings height of Raphanus sativus and Desmodium styracifolium showed the results in which low concentration promoted and high concentration inhibited, and with increasing concentration increased the promotion or inhibition effects. But in the measured concentration range, the effects on the seedlings height of Brassica chinensis were showed promote effect. Within the testing concentration range, water extracts of Andrographis paniculata on allelopathic effects of cabbage (Brassica chinensis), Radis (Raphanus sativus) and Desmodium styracifolium showed allelopathic effect, and roughly showed inhibiti effect. However, showed different effect in which high concentration inhibitied and low concentration promoted to different receptor.

  4. Use of Different Vegetable Products to Increase Preschool-Aged Children's Preference for and Intake of a Target Vegetable

    Wild, de Victoire W.T.; Graaf, de Kees; Jager, Gerry

    2017-01-01

    Background: Children's low vegetable consumption requires effective strategies to enhance preference for and intake of vegetables. Objective: The study compared three preparation practices for a target vegetable (spinach) on their effectiveness in increasing preschool-aged children's preference

  5. Golden Gate National Recreation Area Vegetation Inventory Project

    California Natural Resource Agency — High resolution vegetation polygons mapped by the National Park Service. The vegetation units of this map were determined through stereoscopic interpretation of...

  6. Vegetation - Napa County and Blue Ridge Berryessa [ds201

    California Department of Resources — In 1995, the Manual of California Vegetation (MCV) introduced a quantitatively based method for classifying and mapping vegetation in California. In 2002 Department...

  7. Vegetation - Napa County and Blue Ridge Berryessa [ds201

    California Natural Resource Agency — In 1995, the Manual of California Vegetation (MCV) introduced a quantitatively based method for classifying and mapping vegetation in California. In 2002 Department...

  8. Central American Vegetation/Land Cover Classification and Conservation Status

    National Aeronautics and Space Administration — The Central American Vegetation/Land Cover Classification and Conservation Status data set consists of GIS coverages of vegetation classes (forests, woodlands,...

  9. Anomalías en los comienzos de la transgénesis vegetal: intereses e interpretaciones en torno a las primeras plantas transgénicas

    Pablo A. Pellegrini

    2013-12-01

    Full Text Available Se presentan los orígenes de la transgénesis vegetal, analizando los experimentos que llevaron a la obtención de las primeras plantas transgénicas. Aquí se entrecruzan actores, prácticas e intereses que resultan emblemáticos de la biotecnología. Se trata, además, de un caso donde se pone en juego el consenso sobre el sentido de experimentos fundamentales. Estos sucesos permiten ilustrar parte de los conflictos en los que se involucran los organismos genéticamente modificados, pues en torno a estos primeros experimentos los científicos articularán representaciones distintas sobre la transgénesis vegetal, valorando de un modo distinto las anomalías que presentaban los primeros experimentos. De este modo, se analizan los intereses e interpretaciones en torno a los primeros experimentos con plantas transgénicas.

  10. Exploring vegetation in the fourth dimension.

    Mitchell, Fraser J G

    2011-01-01

    Much ecological research focuses on changes in vegetation on spatial scales from stands to landscapes; however, capturing data on vegetation change over relevant timescales remains a challenge. Pollen analysis offers unrivalled access to data with global coverage over long timescales. Robust techniques have now been developed that enable pollen data to be converted into vegetation data in terms of individual taxa, plant communities or biomes, with the possibility of deriving from those data a range of plant attributes and ecological indicators. In this review, I discuss how coupling pollen with macrofossil, charcoal and genetic data opens up the extensive pollen databases to investigation of the drivers of vegetation change over time and also provides extensive data sets for testing hypotheses with wide ecological relevance. © 2010 Elsevier Ltd. All rights reserved.

  11. Innovative Remote Sensing techniques for vegetation monitoring

    Borfecchia, F.; De Cecco, L.; Della Rocca, A.B.; Farneti, A.; La Porta, L.; Martini, S.; Giordano, L.; Trotta, C.; Marcoccia, S.

    2008-01-01

    This paper describes methods developed for using ASPIS (Advanced Spectroscopic Imaging System) to monitor biophysical parameters in studying the effects of climatic change, desertification and land degradation on semi-natural and agricultural vegetation in the Mediterranean region [it

  12. Bonneville - Hood River Vegetation Management Environmental Assessment

    N/A

    1998-08-01

    To maintain the reliability of its electrical system, BPA, in cooperation with the U.S. Forest Service, needs to expand the range of vegetation management options used to clear unwanted vegetation on about 20 miles of BPA transmission line right-of-way between Bonneville Dam and Hood River; Oregon, within the Columbia Gorge National Scenic Area (NSA). We propose to continue controlling undesirable vegetation using a program of Integrated Vegetation Management (IVM) which includes manual, biological and chemical treatment methods. BPA has prepared an Environmental Assessment (EA) (DOE/EA-1257) evaluating the proposed project. Based on the analysis in the EA, BPA has determined that the proposed action is not a major Federal action significantly affecting the quality of the human environment, within the meaning of the National Environmental Policy Act (NEPA) of 1969. Therefore, the preparation of an Environmental Impact Statement (EIS) is not required and BPA is issuing this FONSI.

  13. relationships between vegetation composition and environmental

    Preferred Customer

    Borana region, studies on the plant-environment interactions are scanty .... The ordination methods used for the vegetation ..... adaptation, rangeland restoration and also for identifying places ... mangrove forests in Kenya and Sri Lanka. Plant.

  14. African indigenous and traditional vegetables in Tanzania ...

    Indigenous and traditional African vegetables (AITVs) are important sources of ... and (iii) marketing: retail markup, price variation by season, year and region, ... size and cost, retailer storage, remainders, processing and less common AITVs.

  15. ISLSCP II Potential Natural Vegetation Cover

    National Aeronautics and Space Administration — ABSTRACT: This data set was developed to describe the state of the global land cover in terms of 15 major vegetation types, plus water, before alteration by humans....

  16. Hydrolyzed Vegetable Protein Containing Products Recalls

    U.S. Department of Health & Human Services — This list includes products subject to recall in the United States since February 2010 related to hydrolyzed vegetable protein (HVP) paste and powder distributed by...

  17. Sustainable landscaping practices for enhancing vegetation establishment.

    2016-02-01

    Soil compaction can severely limit the success of vegetation establishment. Current grading and landscaping : practices commonly produce compacted soils of varied textures and profiles within SHA medians and roadsides, : resulting in limited capacity...

  18. Soil-vegetation-atmosphere transfer modeling

    Ikonen, J.P.; Sucksdorff, Y. [Finnish Environment Agency, Helsinki (Finland)

    1996-12-31

    In this study the soil/vegetation/atmosphere-model based on the formulation of Deardorff was refined to hour basis and applied to a field in Vihti. The effect of model parameters on model results (energy fluxes, temperatures) was also studied as well as the effect of atmospheric conditions. The estimation of atmospheric conditions on the soil-vegetation system as well as an estimation of the effect of vegetation parameters on the atmospheric climate was estimated. Areal surface fluxes, temperatures and moistures were also modelled for some river basins in southern Finland. Land-use and soil parameterisation was developed to include properties and yearly variation of all vegetation and soil types. One classification was selected to describe the hydrothermal properties of the soils. Evapotranspiration was verified against the water balance method

  19. Vegetation patterns and environmental gradients in Benin

    Adomou, A.

    2005-01-01

    Key words: West Africa, Benin, vegetation patterns, floristic areas, phytogeography, chorology, floristic gradients, climatic factors, water availability, Dahomey Gap, threatened plants, biodiversity, conservation.Understanding plant species distribution patterns and the underlying factors is a

  20. African leafy vegetables in South Africa

    some of them grow as weeds, has a long history that has been intimately linked to women and their ..... African smallholders has been rapidly spreading from Vhembe ..... vegetables in household food security: a preliminary case study in.

  1. ISLSCP II C4 Vegetation Percentage

    National Aeronautics and Space Administration — The photosynthetic composition (C3 or C4) of vegetation on the land surface is essential for accurate simulations of biosphere-atmosphere exchanges of carbon, water,...

  2. ISLSCP II C4 Vegetation Percentage

    National Aeronautics and Space Administration — ABSTRACT: The photosynthetic composition (C3 or C4) of vegetation on the land surface is essential for accurate simulations of biosphere-atmosphere exchanges of...

  3. Delta Vegetation and Land Use [ds292

    California Natural Resource Agency — Vegetation and land use are mapped for the approximately 725,000 acres constituting the Legal Delta portion of the Sacramento and San Joaquin River Delta area....

  4. Soil-vegetation-atmosphere transfer modeling

    Ikonen, J P; Sucksdorff, Y [Finnish Environment Agency, Helsinki (Finland)

    1997-12-31

    In this study the soil/vegetation/atmosphere-model based on the formulation of Deardorff was refined to hour basis and applied to a field in Vihti. The effect of model parameters on model results (energy fluxes, temperatures) was also studied as well as the effect of atmospheric conditions. The estimation of atmospheric conditions on the soil-vegetation system as well as an estimation of the effect of vegetation parameters on the atmospheric climate was estimated. Areal surface fluxes, temperatures and moistures were also modelled for some river basins in southern Finland. Land-use and soil parameterisation was developed to include properties and yearly variation of all vegetation and soil types. One classification was selected to describe the hydrothermal properties of the soils. Evapotranspiration was verified against the water balance method

  5. Vegetation - Suisun Marsh 2000 [ds161

    California Natural Resource Agency — This vegetation mapping project of Suisun Marsh blends ground-based classification, aerial photo interpretation, and GIS editing and processing. The method is based...

  6. Vegetation - Suisun Marsh 1999 [ds160

    California Natural Resource Agency — This vegetation mapping project of Suisun Marsh blends ground-based classification, aerial photo interpretation, and GIS editing and processing. The method is based...

  7. Review article: Vegetative growth, reproduction, browse production ...

    Vegetative growth, reproduction, browse production and response to tree clearing of ... water stress, soil nutrient availability, carbohydrate reserves, plant hormones, ... animal-plant interactions) of woody plants in various savanna ecosystems.

  8. Vegetation - Suisun Marsh 2003 [ds162

    California Natural Resource Agency — This vegetation mapping project of Suisun Marsh blends ground-based classification, aerial photo interpretation, and GIS editing and processing. The method is based...

  9. Vegetation composition and structure influences bird species ...

    Vegetation composition and structure influences bird species community ... variables on bird species diversity and richness of respective foraging guilds, and ... of the species assessed: (1) increasing closed cover due to woody plant density, ...

  10. Monitoring of vegetation dynamics and assessing vegetation response to drought in the Iberian Peninsula

    Garcia-Haro, F. J.; Moreno, A.; Perez-Hoyos, A.; Gilabert, M. A.; Melia, J.; Belda, F.; Poquet, D.; Martinez, B.; Verger, A.

    2009-07-01

    Monitoring the vegetation activity over long time-scales is necessary to discern ecosystem response to climate variability. Spatial and temporally consistent estimates of the biophysical variables such as fractional vegetation cover (FVC) and leaf area index (LAI) have been obtained in the context of DULCINEA Project. We used long-term monthly climate statistics to build simple climatic indices (SPI, moisture index) at different time scales. From these indices, we estimated that the climatic disturbances affected both the growing season and the total amount of vegetation. This implies that the anomaly of vegetation cover is a good indicator of moisture condition and can be an important data source when used for detecting an monitoring drought in the Iberian Peninsula. The impact of climate variability on the vegetation dynamics has shown not to be the same for every region. We concluded that the relationships between vegetation anomaly and moisture availability are significant for the arid and semiarid areas. (Author) 6 refs.

  11. Monitoring of vegetation dynamics and assessing vegetation response to drought in the Iberian Peninsula

    Garcia-Haro, F. J.; Moreno, A.; Perez-Hoyos, A.; Gilabert, M. A.; Melia, J.; Belda, F.; Poquet, D.; Martinez, B.; Verger, A.

    2009-01-01

    Monitoring the vegetation activity over long time-scales is necessary to discern ecosystem response to climate variability. Spatial and temporally consistent estimates of the biophysical variables such as fractional vegetation cover (FVC) and leaf area index (LAI) have been obtained in the context of DULCINEA Project. We used long-term monthly climate statistics to build simple climatic indices (SPI, moisture index) at different time scales. From these indices, we estimated that the climatic disturbances affected both the growing season and the total amount of vegetation. This implies that the anomaly of vegetation cover is a good indicator of moisture condition and can be an important data source when used for detecting an monitoring drought in the Iberian Peninsula. The impact of climate variability on the vegetation dynamics has shown not to be the same for every region. We concluded that the relationships between vegetation anomaly and moisture availability are significant for the arid and semiarid areas. (Author) 6 refs.

  12. Becquerel in raw fruit and vegetables?

    Heilgeist, M.

    1989-01-01

    After a general introduction and definition of the basic terms, the quantity of radionuclides of natural and artificial origin in our environment is shown. The specific activity of Cs-134 and Cs-137 in fruit and vegetables before and after the accident in Chernobyl is demonstrated. Finally, the quantity of the radioactivity consumed by the human being with fruit and vegetable is compared with the values of the total food consumption. (orig./HP) [de

  13. Recent Vegetation Fire Incidence in Russia

    Hayasaka, Hiroshi

    2011-01-01

    MODIS hotspot data from NASA have now become a standard means of evaluating vegetation fires worldwide. Remote sensing is the most effective tool for large countries like Russia because it is hard to obtain exact, detailed forest fire data. Accumulated MODIS hotspot data of the nine years from 2002 to 2010 may allow us to assess recent changes in the vegetation fire incidence in Russia. This kind of analysis using various satellites is useful in estimating fire intensity and sever...

  14. CONSIDERATIONS ON ROMANIA’S VEGETABLE MARKET

    Agatha POPESCU

    2013-12-01

    Full Text Available The paper aimed to present the situation of Romania’s vegetable market in the period 2007-2011 based on the statistical data regarding the main vegetables: tomatoes, onion, garlic, cabbage, green peppers and melons. The vegetable production increased by 33.99 from 3,166.8 tons in 2007 to 4,176.3 tons in 2011.This was due to the yield gain as follows: 58.55 % for melons, 27.62 % for green peppers, 27.05 % for tomatoes, 25.99 % for dry garlic, 24.96 % for dry onion, 12.61 % for white cabbage. In 2011, the contribution of various categories of vegetables to production was: 24.55 % white cabbage, 21.81 % tomatoes, 15.45 % melons, 9.44 % onion, 6.06 % green pepper, 1.59 % garlic and 21.1 % other vegetables. The contribution of the micro regions to vegetable production in 2011 was: 19.46 % South Muntenia, 18.95 % South East Romania, 17.30 % South West Oltenia, 15.92 % North East Romania, 10.43 % West Romania, 8.47 % North West Romania, 6.54 % Central Romania, 2.93 % Bucharest Ilfov. Vegetable production per inhabitant is higher in Romania compared to the average production per capita in the EU. The average consumption increased as a postive aspect reflecting the obtained production and import. Vegetable production should increase in order to cover much better the doestic market needs and support export to the EU market.

  15. Comparison of Pasture Vegetation in LFA Areas

    Klára Kecseiová

    2012-05-01

    Full Text Available The aim of this study was to compare pasture vegetation in LFA areas located in two different altitudes. Pasture vegetation sampling was performed 1 month on two different farms (Těšov, Vlčí Jámy. The selected places were marked by three representative places at 10 m2. Dried samples were weighed and chemically analyzed by standard methods ÚKZÚZ.

  16. Phytosociological characteristics of forest vegetation NPR Dubnik

    Hrabovsky, A.; Balkovic, J.; Kollar, J.

    2010-01-01

    National Wildlife (NPR) Dubnik represents a unique fragment of natural forest vegetation in the region of Nitra loess upland. Status of oak and oak-hornbeam forests in this book was last documented in 1965. The aim of the contribution is to assess the current status of forest vegetation in the NPR Dubnik by modern methods of phytosociology in accordance with current thinking on the classification of oak and oak-hornbeam forests.

  17. Radar for Measuring Soil Moisture Under Vegetation

    Moghaddam, Mahta; Moller, Delwyn; Rodriguez, Ernesto; Rahmat-Samii, Yahya

    2004-01-01

    A two-frequency, polarimetric, spaceborne synthetic-aperture radar (SAR) system has been proposed for measuring the moisture content of soil as a function of depth, even in the presence of overlying vegetation. These measurements are needed because data on soil moisture under vegetation canopies are not available now and are necessary for completing mathematical models of global energy and water balance with major implications for global variations in weather and climate.

  18. Compositional Changes in Selected Minimally Processed Vegetables

    O'Reilly, Emer, (Thesis)

    2000-01-01

    Compositional, physiological and microbiological changes in selected minimally processed vegetables packaged under a modified atmosphere of 2% oxygen and 5% carbon dioxide were monitored over a ten day storage period at 40 C and 80 C. The analysis targeted specific changes in the nutritional, chemical and physiological make up of the vegetables as well as the changes in the microbial levels. In addition the changes in the gas atmospheres within the packs were monitored. It has been widely acc...

  19. Hydraulic Aspects of Vegetation Maintanence in Streams

    Larsen, Torben; Vestergaard, Kristian

    1991-01-01

    This paper describes the importance of the underwater vegetation on Danish streams and some of the consequences of vegetation maintenance. the influence of the weed on the hydraulic conditions is studied through experiments in a smaller stream and the effect of cutting channels through the weed...... is measured. A method for predicting the Manning's n as a function of the discharge conditions is suggested, and also a working hypothesis for predictions of the effect of channel cutting is presented....

  20. Fruits, vegetables, 100% juices, and cognitive function.

    Lamport, Daniel J; Saunders, Caroline; Butler, Laurie T; Spencer, Jeremy Pe

    2014-12-01

    Although reviews of the association between polyphenol intake and cognition exist, research examining the cognitive effects of fruit, vegetable, and juice consumption across epidemiological and intervention studies has not been previously examined. For the present review, critical inclusion criteria were human participants, a measure of fruit, vegetable, or 100% juice consumption, an objective measure of cognitive function, and a clinical diagnosis of neuropsychological disease. Studies were excluded if consumption of fruits, vegetables, or juice was not assessed in isolation from other food groups, or if there was no statistical control for education or IQ. Seventeen of 19 epidemiological studies and 3 of 6 intervention studies reported significant benefits of fruit, vegetable, or juice consumption for cognitive performance. The data suggest that chronic consumption of fruits, vegetables, and juices is beneficial for cognition in healthy older adults. The limited data from acute interventions indicate that consumption of fruit juices can have immediate benefits for memory function in adults with mild cognitive impairment; however, as of yet, acute benefits have not been observed in healthy adults. Conclusions regarding an optimum dietary intake for fruits, vegetables, and juices are difficult to quantify because of substantial heterogeneity in the categorization of consumption of these foods. © 2014 International Life Sciences Institute.

  1. Fruit and vegetable consumption: benefits and barriers.

    Maclellan, Debbie L; Gottschall-Pass, Katherine; Larsen, Roberta

    2004-01-01

    Few people on Prince Edward Island meet the goal of consuming five or more servings of vegetables and fruit a day. The main objective of this qualitative study was to explore the perceptions of the nutritional benefits and barriers to vegetable and fruit intake among adult women in Prince Edward Island. Participants were 40 women aged 20-49, with or without children at home, who were or were not currently meeting the objective of eating five or more fruit and vegetable servings a day. In-home, one-on-one interviews were used for data collection. Thematic analysis was conducted on the transcribed interviews. Data were examined for trustworthiness in the context of credibility, transferability, and dependability. Most participants identified one or more benefits of eating fruit and vegetables; however, comments tended to be non-specific. The main barriers that participants identified were effort, lack of knowledge, sociopsychological and socioenvironmental factors, and availability. Internal influences, life events, and food rules were identified as encouraging women to include vegetables and fruit in their diets. Given the challenges of effecting meaningful dietary change, dietitians must look for broader dietary behavioural interventions that are sensitive to women's perceptions of benefits and barriers to fruit and vegetable intake.

  2. Radiocesium cycling in vegetation and soil

    Dahlman, R.C.; Francis, C.W.; Tamura, T.

    1975-01-01

    Data on cesium dynamics in vegetation and soils are reviewed. Special emphasis is placed on typical environments in the southeastern United States. Clay minerals of soil, especially micaceous types, effectively fix cesium and remove it from biotic components of ecosystems. Fallout 137 Cs enters food chains principally by direct deposition on vegetation; uptake by the root pathway is usually less than direct contamination of plant foliage. Cesium-137 levels in vegetation of the southeastern U. S. Coastal Plain are estimated on the basis of direct deposition from the atmosphere and root uptake from soil. Estimated concentrations, based on current concepts of 137 Cs dynamics in vegetation and fixation in soil, are in good agreement with observed values of 137 Cs in vegetation collected in 1969 and 1970. Mechanisms of direct deposition and of increased uptake by roots due to the absence of micaceous clays adequately explain the higher levels of 137 Cs in vegetation of the Coastal Plain and thus are responsible for the elevated 137 Cs reported for milk of the Tampa, Fla., milkshed

  3. Seasonally asymmetric enhancement of northern vegetation productivity

    Park, T.; Myneni, R.

    2017-12-01

    Multiple evidences of widespread greening and increasing terrestrial carbon uptake have been documented. In particular, enhanced gross productivity of northern vegetation has been a critical role leading to observed carbon uptake trend. However, seasonal photosynthetic activity and its contribution to observed annual carbon uptake trend and interannual variability are not well understood. Here, we introduce a multiple-source of datasets including ground, atmospheric and satellite observations, and multiple process-based global vegetation models to understand how seasonal variation of land surface vegetation controls a large-scale carbon exchange. Our analysis clearly shows a seasonally asymmetric enhancement of northern vegetation productivity in growing season during last decades. Particularly, increasing gross productivity in late spring and early summer is obvious and dominant driver explaining observed trend and variability. We observe more asymmetric productivity enhancement in warmer region and this spatially varying asymmetricity in northern vegetation are likely explained by canopy development rate, thermal and light availability. These results imply that continued warming may facilitate amplifying asymmetric vegetation activity and cause these trends to become more pervasive, in turn warming induced regime shift in northern land.

  4. Vegetation index anomaly response to varying lengths of drought across vegetation and climatic gradients in Hawaii

    Lucas, M.; Miura, T.; Trauernicht, C.; Frazier, A. G.

    2017-12-01

    A drought which results in prolonged and extended deficit in naturally available water supply and creates multiple stresses across ecosystems is classified as an ecological drought. Detecting and understanding the dynamics and response of such droughts in tropical systems, specifically across various vegetation and climatic gradients is fairly undetermined, yet increasingly important for better understandings of the ecological effects of drought. To understanding the link between what lengths and intensities of known meteorological drought triggers detectable ecological vegetation responses, a landscape scale regression analysis evaluating the response (slope) and relationship strength (R-squared) of several cumulative SPI (standard precipitation index) lengths(1, 3, 6, 12, 18, 24, 36, 48, and 60 month), to various satellite derived monthly vegetation indices anomalies (NDVI, EVI, EVI2, and LSWI) was performed across a matrix of dominant vegetation covers (grassland, shrubland, and forest) and climatic moisture zones (arid, dry, mesic, and wet). The nine different SPI lags across these climactic and vegetation gradients was suggest that stronger relationships and steeper slopes were found in dryer climates (across all vegetation covers) and finer vegetation types (across all moisture zones). Overall NDVI, EVI and EVI2 showed the best utility in these dryer climatic zones across all vegetation types. Within arid and dry areas "best" fits showed increasing lengths of cumulative SPI were with increasing vegetation coarseness respectively. Overall these findings suggest that rainfall driven drought may have a stronger impact on the ecological condition of vegetation in water limited systems with finer vegetation types ecologically responding more rapidly to meteorological drought events than coarser woody vegetation systems. These results suggest that previously and newly documented trends of decreasing rainfall and increasing drought in Hawaiian drylands may have

  5. Los procesos de domesticación vegetal y animal : Un aporte a la discusión argentina en los últimos 70 años

    Yacobaccio, Hugo; Korstanje, M. Alejandra

    2007-01-01

    En este trabajo se pasa revista a los estudios sobre domesticación vegetal y animal en la arqueología argentina, se plantea su estado actual y las perspectivas futuras. Se discuten, asimismo, diversos aspectos teóricos vinculados a la domesticación, incluyendo el concepto mismo, y se evalúa la evidencia disponible hasta hoy en día. Sociedad Argentina de Antropología

  6. Trayectorias (sobre ruedas): un ensayo visual sobre los carritos de supermercado en la ciudad

    Cruz, Edgar Gómez

    2014-01-01

    El siguiente trabajo es un breve bosquejo de las posibilidades del concepto de trabajo “trayectoria”. Una trayectoria no es sólo, en el sentido literal del término, el trazo del movimiento sobre un camino, sino que busca establecer una reflexión sobre las posibilidades de recolección de registros visuales/digitales/móviles para la investigación etnográfica desde la aleatoriedad del movimiento por la ciudad. El concepto de trayectoria busca dialogar con el de “flâneur” de De Certeau y Benjamin...

  7. Development of indicators of vegetation recovery based on time series analysis of SPOT Vegetation data

    Lhermitte, S.; Tips, M.; Verbesselt, J.; Jonckheere, I.; Van Aardt, J.; Coppin, Pol

    2005-10-01

    Large-scale wild fires have direct impacts on natural ecosystems and play a major role in the vegetation ecology and carbon budget. Accurate methods for describing post-fire development of vegetation are therefore essential for the understanding and monitoring of terrestrial ecosystems. Time series analysis of satellite imagery offers the potential to quantify these parameters with spatial and temporal accuracy. Current research focuses on the potential of time series analysis of SPOT Vegetation S10 data (1999-2001) to quantify the vegetation recovery of large-scale burns detected in the framework of GBA2000. The objective of this study was to provide quantitative estimates of the spatio-temporal variation of vegetation recovery based on remote sensing indicators. Southern Africa was used as a pilot study area, given the availability of ground and satellite data. An automated technique was developed to extract consistent indicators of vegetation recovery from the SPOT-VGT time series. Reference areas were used to quantify the vegetation regrowth by means of Regeneration Indices (RI). Two kinds of recovery indicators (time and value- based) were tested for RI's of NDVI, SR, SAVI, NDWI, and pure band information. The effects of vegetation structure and temporal fire regime features on the recovery indicators were subsequently analyzed. Statistical analyses were conducted to assess whether the recovery indicators were different for different vegetation types and dependent on timing of the burning season. Results highlighted the importance of appropriate reference areas and the importance of correct normalization of the SPOT-VGT data.

  8. Diversidad vegetal: de los mapuches a la enseñanza formal chilena

    Francisco González-García

    2013-01-01

    Full Text Available Este artículo resume aportes de la tesis doctoral acerca de los conocimientos botánicos de estudiantes de origen mapuche. Se revisaron los problemas sociales del pueblo mapuche, en particular sobre ambiente y educación. Se examinó la taxo - nomía botánica presente en la lengua mapuche, lo que reveló la importancia de la diversidad vegetal para tradiciones, usos y cosmovisión mapuches. Entre los estudiantes de enseñanza media de origen mapuche se apreció que sus conocimientos de biología vegetal constituyen un rico aporte y que estudian - tes que inician estudios universitarios de Ingeniería Forestal y Agronomía tienen un conocimiento muy inferior. La ense - ñanza formal puede aprovechar este potencial en una educa - ción científica intercultural para la protección de ecosistemas amenazados.Por medio de su inclusión en los contenidos educativos en to - dos los niveles de enseñanza, el conocimiento de la biodiversi - dad vegetal de Chile y de los usos tradicionales de sus plantas puede ser muy útil tanto para una adecuada alfabetización científica, como para promover el respeto por las diferentes culturas que integran su población.

  9. Estudio sobre la capacidad de innovación y actividad emprendedora en el ámbito sub-regional: El caso de la Comunidad Autónoma del País Vasco

    José Luis González Pernía

    2009-01-01

    Full Text Available Este trabajo pretende mejorar nuestra comprensión sobre la relación entre la actividad de innovación, la actividad emprendedora y la competitividad, a nivel sub-regional, teniendo para ello en consideración la heterogeneidad comarcal que pueda existir dentro de una región. De los resultados obtenidos en nuestro estudio se desprende que las empresas de rápido crecimiento y mayor tamaño se benefician de economías de aglomeración que propician un tipo de innovación empresarial más incremental (explotación de conocimiento, especialmente sintético desarrolladas en regiones no-metropolitanas, donde las jóvenes empresas se especializan más en la "D" de Desarrollo que en la "I" de Investigación. En cambio, las iniciativas emprendedoras ubicadas en las zonas metropolitanas se basan en mayor medida en la "I" de Investigación cuyo origen fundamentalmente es la universidad o un centro tecnológico y desarrollan un tipo de innovación de un carácter más radical (exploración de conocimiento, especialmente analítico. Una mejora en el nivel de competitividad de una región requeriría el desarrollo equilibrado de ambos tipos de economías de aglomeración y localización geográfica especializada de nuevas iniciativas emprendedoras, teniendo para ello en consideración las características singulares de las sub-regiones.

  10. Estudio sobre la capacidad de innovación y actividad emprendedora en el ámbito sub-regional: El caso de la Comunidad Autónoma del País Vasco

    Mikel Navarro Arancegui

    2009-10-01

    Full Text Available Este trabajo pretende mejorar nuestra comprensión sobre la relación entre la actividad de innovación, la actividad emprendedora y la competitividad, a nivel sub-regional, teniendo para ello en consideración la heterogeneidad comarcal que pueda existir dentro de una región. De los resultados obtenidos en nuestro estudio se desprende que las empresas de rápido crecimiento y mayor tamaño se benefician de economías de aglomeración que propician un tipo de innovación empresarial más incremental (explotación de conocimiento, especialmente sintético desarrolladas en regiones no-metropolitanas, donde las jóvenes empresas se especializan más en la “D” de Desarrollo que en la “I” de Investigación. En cambio, las iniciativas emprendedoras ubicadas en las zonas metropolitanas se basan en mayor medida en la “I” de Investigación cuyo origen fundamentalmente es la universidad o un centro tecnológico y desarrollan un tipo de innovación de un carácter más radical (exploración de conocimiento, especialmente analítico. Una mejora en el nivel de competitividad de una región requeriría el desarrollo equilibrado de ambos tipos de economías de aglomeración y localización geográfica especializada de nuevas iniciativas emprendedoras, teniendo para ello en consideración las características singulares de las sub-regiones.

  11. II Jornadas sobre Emprendimiento Social y Colectivo

    Centro de Investigación en Gestión de Empresas

    2013-01-01

    La línea temática principal del encuentro es el emprendimiento social y colectivo así como las diferentes líneas de investigación de los institutos y centros de la Red relacionadas, como: responsabilidad social, empleo y reincorporación al trabajo, inserción laboral, servicios sociales y dependencia, género, cambios legislativos, utilidad social, medio ambiente, desarrollo local,... Centro de Investigación en Gestión de Empresas (2013). II Jornadas sobre Emprendimiento Social y Colectivo. ...

  12. Literatura infantil sobre problemas infantiles: la diabetes

    Lázaro Fernández, Patricia

    2015-01-01

    Debido al creciente número de casos de diabetes infantil que se está dando en la sociedad actual, no es raro encontrarse en las aulas cada vez más casos de esta enfermedad. Por esta razón, he decidido analizar dos libros sobre esta temática, para hacer un acercamiento del material seleccionado a las aulas y poder desarrollar junto con los niños un aprendizaje colectivo y cooperativo. En este trabajo se expone la importancia de la literatura y la literatura infantil como una ...

  13. Soportes apoyados sobre vigas pretensadas (EE. UU.

    Editorial, Equipo

    1965-12-01

    Full Text Available This work has been awarded a prize by the Prestreesed Concrete Institute. It refers to a number of flyovers on the Arroyo Seco, of California. This river has been canalized, to help drainage in case of heavy rainfall. The canal runs through a highly populated zone, and a motor road and accessory ramps had to cross the canal. The resulting design involves three prestressed girders, lightly arched in a parabolic outline, resting on each river shore, running along the line of the bridge, over the canal. It was decided that the bridge piles should not rest on the river bed, in order not to reduce its flow capacity. The girders of a maximum length of 39 ms, are box shaped, and stiffened with thin diaphragms. The cylindrical pile, 1.50 m in diameter, is an integral part of the girder, and applies to it a concentrated load of about 4000 tons. The girders rest on reinforced concrete cubes, which in turn are supported by concrete slabs and piles driven into the soil.Esta obra ha sido premiada por el Prestressed Concrete Institute y se refiere a una serie de pasos superiores sobre el Arroyo Seco, en California, que se ha canalizado para servir de desagüe en el caso de avenidas torrenciales. El canal se halla en una zona de edificación densa y se trata del paso—sobre aquél—de una autopista y rampas de acceso. La solución adoptada consistió en tres vigas pretensadas, ligeramente arqueadas con perfil parabólico, apoyadas en las dos márgenes y situadas en correspondencia con los tres soportes, sobre el propio canal, ya que ninguno de aquéllos debía apoyarse en el lecho de este último al objeto de no disminuir su capacidad de desagüe. Las vigas—de unos 39 m de longitud la mayor—son del tipo cajón, rigidizadas con unos diafragmas de pequeño espesor. El soporte cilíndrico, de 1,50 m de diámetro, se solidariza con la viga y le transmite una notable carga concentrada, del orden de 4.000 toneladas. Los apoyos de estas vigas son simples dados

  14. Ensayo sobre la melancolía

    Marta Chacón Salinas

    2013-07-01

    Full Text Available Este trabajo es un intento de delimitar la melancolía del conjunto de los trastornos depresivos y de reflexionar sobre sus características tal como aparecen en el discurso de los melancólicos. Se consideran algunas hipótesis en la línea psicoanalítica freudiana y lacaniana (Lambottc, Kristeva para entender cómo se va constituyendo en sus características principales: la intolerancia a la pérdida del objeto y el desfallecimiento del símbolo que le impide elaborar este duelo.

  15. Comentarios sobre dibujo analítico

    Mata Botella, Elena

    2004-01-01

    Cuaderno de apoyo a la docencia del DIBUJO DE ARQUITECTURA que pretende hacer reflexionar al alumno (de primero o segundo de carrera) sobre un tipo de dibujo que aquí se ha llamado “dibujo analítico”. Un dibujo que a través de operaciones gráficas y conceptuales como la esquematización y la selección de información, tiende a alejarse de la descripción del objeto arquitectónico para adentrarse en determinados aspectos o dimensiones que subyacen en el proyecto arquitectónico. Unas notas intr...

  16. Sobre la evaluación docente

    Chamizo, José Antonio

    2012-01-01

    Las universidades requieren una reflexión profunda sobre sus metas primordiales para construir una cultura de la evaluación de la actividad de enseñanza, la cual es diferente de la de investigación. La idea principal es que el proceso de evaluación sumativa, burocrático, superficial y cerrado, sea transformado en uno que involucre a los profesores y sea y abierto. Universities require a deep reflection on their ultimate goals to build a culture of evaluation on teaching activities, which a...

  17. Refuerzo de pavimentos sobre arcillas expansivas

    Zornberg, Jorge

    2012-01-01

    El refuerzo de la capa base de pavimentos se ha utilizado a los efectos de: (i) aumentar la vida útil de un pavimento manteniendo el espesor de la capa base, o (ii) disminuir el espesor de la capa base manteniendo la vida útil del pavimento. Este artículo describe una tercera aplicación del refuerzo basal de pavimentos, a saber, la mitigación de grietas longitudinales inducidas en pavimentos construidos sobre subrasantes compuestas de arcillas expansivas. Aunque todavía existe la necesidad de...

  18. Cinco puntos sobre la revista Barcelona

    Bertone Crippa, Mauro

    2012-01-01

    El humor, como género y narrativa mediática, ocupa un lugar destacado al interior del campo del periodismo gráfico argentino. Como emergente contemporáneo dentro de este ámbito, la revista Barcelona se vuelve un objeto de estudio sugestivo al trabajar, a partir del registro del humor, sobre la agenda y la enunciación de los medios gráficos de actualidad. De esta manera, se analizan las condiciones de producción del discurso de Barcelona para ver qué novedades aporta al campo del hu...

  19. Observaciones sobre colostomía

    Jaime Escobar T.

    1971-01-01

    Full Text Available Se hace una revisión sobre 133 casos de colostomías hechas en pacientes del Hospital San Juan de Dios de Bogotá en un período de cinco años; el 43.7 por ciento de los casos eran heridas por arma de fuego. La mortalidad global fue de 16.5 por ciento. La colostomía derivativa, en ASA, ha bajado la mortalidad en las heridas de colon en dicho hospital.

  20. Post-fire vegetation recovery in Portugal based ewline on spot/vegetation data

    C. Gouveia

    2010-04-01

    Full Text Available A procedure is presented that allows identifying large burned scars and the monitoring of vegetation recovery in the years following major fire episodes. The procedure relies on 10-day fields of Maximum Value Composites of Normalized Difference Vegetation Index (MVC-NDVI, with a 1 km×1 km spatial resolution obtained from the VEGETATION instrument. The identification of fire scars during the extremely severe 2003 fire season is performed based on cluster analysis of NDVI anomalies that persist during the vegetative cycle of the year following the fire event. Two regions containing very large burned scars were selected, located in Central and Southwestern Portugal, respectively, and time series of MVC-NDVI analysed before the fire events took place and throughout the post-fire period. It is shown that post-fire vegetation dynamics in the two selected regions may be characterised based on maps of recovery rates as estimated by fitting a monoparametric model of vegetation recovery to MVC-NDVI data over each burned scar. Results indicated that the recovery process in the region located in Central Portugal is mostly related to fire damage rather than to vegetation density before 2003, whereas the latter seems to have a more prominent role than vegetation conditions after the fire episode, e.g. in the case of the region in Southwestern Portugal. These differences are consistent with the respective predominant types of vegetation. The burned area located in Central Portugal is dominated by Pinus Pinaster whose natural regeneration crucially depends on the destruction of seeds present on the soil surface during the fire, whereas the burned scar in Southwestern Portugal was populated by Eucalyptus that may quickly re-sprout from buds after fire. Besides its simplicity, the monoparametric model of vegetation recovery has the advantage of being easily adapted to other low-resolution satellite data, as well as to other types of vegetation

  1. Post-fire vegetation recovery in Portugal based on spot/vegetation data

    Gouveia, C.; Dacamara, C. C.; Trigo, R. M.

    2010-04-01

    A procedure is presented that allows identifying large burned scars and the monitoring of vegetation recovery in the years following major fire episodes. The procedure relies on 10-day fields of Maximum Value Composites of Normalized Difference Vegetation Index (MVC-NDVI), with a 1 km×1 km spatial resolution obtained from the VEGETATION instrument. The identification of fire scars during the extremely severe 2003 fire season is performed based on cluster analysis of NDVI anomalies that persist during the vegetative cycle of the year following the fire event. Two regions containing very large burned scars were selected, located in Central and Southwestern Portugal, respectively, and time series of MVC-NDVI analysed before the fire events took place and throughout the post-fire period. It is shown that post-fire vegetation dynamics in the two selected regions may be characterised based on maps of recovery rates as estimated by fitting a monoparametric model of vegetation recovery to MVC-NDVI data over each burned scar. Results indicated that the recovery process in the region located in Central Portugal is mostly related to fire damage rather than to vegetation density before 2003, whereas the latter seems to have a more prominent role than vegetation conditions after the fire episode, e.g. in the case of the region in Southwestern Portugal. These differences are consistent with the respective predominant types of vegetation. The burned area located in Central Portugal is dominated by Pinus Pinaster whose natural regeneration crucially depends on the destruction of seeds present on the soil surface during the fire, whereas the burned scar in Southwestern Portugal was populated by Eucalyptus that may quickly re-sprout from buds after fire. Besides its simplicity, the monoparametric model of vegetation recovery has the advantage of being easily adapted to other low-resolution satellite data, as well as to other types of vegetation indices.

  2. Quantitative indicators of fruit and vegetable consumption

    Dagmar Kozelová

    2015-12-01

    Full Text Available The quantitative research of the market is often based on surveys and questionnaires which are finding out the behavior of customers in observed areas. Before purchasing process consumers consider where they will buy fruit and vegetables, what kind to choose and in what quantity of goods. Consumers' behavior is affected by the factors as: regional gastronomic traditions, price, product appearance, aroma, place of buying, own experience and knowledge, taste preferences as well as specific health issues of consumers and others. The consumption of fruit and vegetables brings into the human body biological active substances that favorably affect the health of consumers. In the presented research study we were interested in differences of consumers' behavior in the consumption of fruit and vegetables according to the place of residence and gender. In the survey 200 respondents has participated; their place of residence was city or village. The existence of dependences and statistical significance were examined by selected statistical testing methods. Firstly we analyzed the responses via statistical F-test whether observed random samples have the same variance. Then we applied two-sample unpaired t-test with equal variance and χ2-test of statistical independence. The statistical significance was tested by corresponding p values. Correlations were proved by the Cramer's V coefficient. We found that place of residence has no impact on the respondents' consumption of fruit. The gender of respondents does not affect their consumption of fruit. Equally, the gender does not affect the respondents' consumption of vegetables. Only in one observed case the significant differences proved that the place of respondent residence has impact on the consumption of vegetables. Higher consumption of vegetables is due to the fact that the majority of citizens, who live in villages, have a possibility to grow their own vegetables and, thus, the demand for it in village

  3. Assessment of vegetable production practices in Qwaqwa within ...

    In this study, the information such as biographical information of the vegetable farmers, information about the vegetable gardens or farms, the current vegetable farming practices, irrigation practices on the vegetable soil and the farmers' physical and financial records were assessed. The assessment was conducted through ...

  4. Assessment of human impacts on landuse and vegetation cover ...

    This paper is an assessment of the impact of man's activities on the landuse and vegetation cover of Mubi region. Landsat MSS Landuse/vegetation image of 1978 and Spot XS landuse/vegetation image of 1995 were used to study the landuse/vegetation cover changes of the region between 1978 and 1995 – a period of 17 ...

  5. Relação entre heterogeneidade ambiental e distribuição de espécies em uma floresta paludosa no Município de Cristais Paulista, SP, Brasil Floristic composition and relationship between environmental heterogeneity and species distribution in a swamp forest from Cristais Paulista, São Paulo State, Brazil

    Aloysio de Pádua Teixeira

    2009-09-01

    Full Text Available Neste estudo foi caracterizada a composição florística e fitossociológica de uma floresta paludosa no nordeste do Estado de São Paulo, onde variações no padrão de drenagem ocorrem principalmente no sentido perpendicular ao curso d'água, em função da topografia. Nosso objetivo foi investigar a distribuição das espécies em relação ao substrato e a entrada de luz na comunidade. Foram alocadas 60 parcelas de 10×10 m, distribuídas em seis grupos de 10 parcelas cada. Em cada parcela foram medidos e identificados os indivíduos com PAP > 10 cm, avaliadas as propriedades químicas e granulometria do solo, o desnível topográfico, a drenagem e a abertura do dossel. Foram registradas 88 espécies, das quais 61 foram observadas nas parcelas. Uma análise de correspondência canônica (CCA indicou correlações entre a distribuição das 29 espécies mais abundantes e drenagem, desnível topográfico e Fe no eixo 1 e abertura do dossel no eixo 2. O coeficiente de Spearman indicou correlações significativas entre 66% das 29 espécies e profundidade do lençol freático ou abertura do dossel. Como exemplo, Calophyllum brasiliense e Xylopia emarginata prevaleceram em solos mal drenados; Siphoneugena densiflora e Virola sebifera em solos bem drenados; Myrcia laruotteana e Xylopia sericea em parcelas com maior abertura de dossel. A heterogeneidade ambiental foi um importante fator na determinação da distribuição e a coexistência de espécies, resultando em um incremento na diversidade local.In the present study, we characterized the floristic composition and tree structure of a swamp forest in northeast of São Paulo State, Brazil, where the drainage pattern changes mainly across the watercourse due to the topography. We aimed to investigate the species distribution in relation to substrate and light entrance in the community. Sixty quadrats (10×10 m were divided into six groups of 10 plots. In each quadrat, individuals with PBH > 10

  6. Influência da heterogeneidade de variâncias na avaliação genética de bovinos de corte da raça Tabapuã Influence of heterogeneity of variances on genetic evaluation of Tabapuã beef cattle

    J.E.G. Campelo

    2003-12-01

    Full Text Available Verificou-se a influência da heterogeneidade de variâncias na avaliação genética de bovinos de corte da raça Tabapuã. Dados de pesos corrigidos aos 120, 240 e 420 dias de idade foram estratificados com base no desvio-padrão fenotípico do peso aos 120 dias dos grupos de contemporâneos em três classes: baixo (18,9kg desvio-padrão. Nas análises de múltiplas características, em que o peso foi considerado característica distinta em cada classe de desvio-padrão, constatou-se que as variâncias genéticas e residuais foram maiores com o aumento do desvio-padrão da classe. As herdabilidades foram 0,26, 0,32 e 0,37 (peso aos 120 dias, 0,28, 0,35 e 0,35 (peso aos 240 dias e 0,14, 0,18 e 0,18 (peso aos 420 dias nas classes de baixo, médio e alto desvio-padrão, respectivamente. As correlações genéticas entre o mesmo peso, nas classes de baixo e alto desvio-padrão foram inferiores a 0,80. As correlações entre os valores genéticos, obtidos de análises múltiplas e de análise geral (sem as classes, foram superiores a 0,93. Observou-se que os reprodutores seriam classificados de forma similar se for considerada ou não a presença de variâncias heterogêneas nas análises.Data from Tabapuã beef cattle were used to study the influence of variance heterogeneity on genetic evaluation. Adjusted weights at 120, 240 and 420 days of age were classified in three classes of standard deviation: low (18.9kg, based on phenotypic standard deviation of the weight at 120 days of age of the contemporary groups. Multiple trait analyses, considering each class of phenotypic standard deviation as a distinct trait, were performed. The genetic and residual variances increased as the phenotypic standard deviation of the class increased. Heritabilities for low, medium and high phenotypic standard deviation classes were 0.26, 0.32 and 0.37 (weight at 120 days, 0.28, 0.35 and 0.35 (weight at 240 days and 0.14, 0.18 and 0.18 (weight at 420 days

  7. Tributos sobre a folha ou sobre o faturamento? Efeitos quantitativos para o Brasil

    Tiago V Cavalcanti

    2008-09-01

    Full Text Available Este artigo estuda os impactos alocativos e de bem-estar de uma reforma tributária que substitui os impostos sobre a folha de salários por outro que incide sobre a receita. Para isso, desenvolve-se um modelo neoclássico de crescimento econômico com impostos sobre a receita e sobre a folha de salários. As simulações com parâmetros da economia brasileira mostram que tal reforma tributária tem um efeito negativo no bem-estar, no estoque de capital de longo prazo e consequentemente no produto per capita de longo prazo. Contudo, o emprego aumenta.This paper studies the impacts of a tax reform which substitutes taxes on labor income by taxes on total revenue. In order to accomplish that, we construct and solve a general equilibrium neoclassical growth model with taxes on labor income and total revenue. The numerical simulations with Brazilian parameters show that such tax reforms would negatively affect welfare, the capital stock, and consequently per capita output. However, employment would increase. Such effects are quantitatively important.

  8. Ecogeomorphology of Sand Dunes Shaped by Vegetation

    Tsoar, H.

    2014-12-01

    Two dune types associated with vegetation are known: Parabolic and Vegetated Linear Dunes (VLDs), the latters are the dominant dune type in the world deserts. Parabolic dunes are formed in humid, sub-humid and semi-arid environments (rather than arid) where vegetation is nearby. VLDs are known today in semiarid and arid lands where the average yearly rainfall is ≥100 mm, enough to support sparse cover of vegetation. These two dune types are formed by unidirectional winds although they demonstrate a different form and have a distinct dynamics. Conceptual and mathematical models of dunes mobility and stability, based on three control parameters: wind power (DP), average annual precipitation (p), and the human impact parameter (μ) show that where human impact is negligible the effect of wind power (DP) on vegetative cover is substantial. The average yearly rainfall of 60-80 mm is the threshold of annual average rainfall for vegetation growth on dune sand. The model is shown to follow a hysteresis path, which explains the bistability of active and stabilized dunes under the same climatic conditions with respect to wind power. We have discerned formation of parabolic dunes from barchans and transverse dunes in the coastal plain of Israel where a decrease in human activity during the second half of the 20th century caused establishment of vegetation on the crest of the dunes, a process that changed the dynamics of these barchans and transverse dunes and led to a change in the shape of the windward slope from convex to concave. These dunes gradually became parabolic. It seems that VLDs in Australia or the Kalahari have always been vegetated to some degree, though the shrubs were sparser in colder periods when the aeolian erosion was sizeable. Those ancient conditions are characterized by higher wind power and lower rainfall that can reduce, but not completely destroy, the vegetation cover, leading to the formation of lee (shadow) dunes behind each shrub. Formation of

  9. SPINIFICI-SCAEVOLETEA SERICEAE, A NEW VEGETATION CLASS FOR PSAMMOPHYTIC DUNE VEGETATION IN THAILAND

    S. PIGNATII

    1996-04-01

    Full Text Available This is a short account on the coastal dune vegetation of the Gulf of Siam in Thailand. Vegetation is mainly composed by succulent creeping plants with herbaceous habit as to Canavalia maritima (Papilionaceae and Iponwea pes-caprae (Convolvulaceae and the robust stoloniferous grass Spinijex littoreus, the last having an important function for the fonnation of coastal dunes.

  10. SPINIFICI-SCAEVOLETEA SERICEAE, A NEW VEGETATION CLASS FOR PSAMMOPHYTIC DUNE VEGETATION IN THAILAND

    S. PIGNATII

    1996-01-01

    Full Text Available This is a short account on the coastal dune vegetation of the Gulf of Siam in Thailand. Vegetation is mainly composed by succulent creeping plants with herbaceous habit as to Canavalia maritima (Papilionaceae and Iponwea pes-caprae (Convolvulaceae and the robust stoloniferous grass Spinijex littoreus, the last having an important function for the fonnation of coastal dunes.

  11. Forest Vegetation Simulator translocation techniques with the Bureau of Land Management's Forest Vegetation Information system database

    Timothy A. Bottomley

    2008-01-01

    The BLM uses a database, called the Forest Vegetation Information System (FORVIS), to store, retrieve, and analyze forest resource information on a majority of their forested lands. FORVIS also has the capability of easily transferring appropriate data electronically into Forest Vegetation Simulator (FVS) for simulation runs. Only minor additional data inputs or...

  12. Microscale vegetation-soil feedback boosts hysteresis in a regional vegetation-climate system

    Janssen, R.H.H.; Meinders, M.B.J.; Nes, van E.H.; Scheffer, M.

    2008-01-01

    It has been hypothesized that a positive feedback between vegetation cover and monsoon circulation may lead to the existence of two alternative stable states in the Sahara region: a vegetated state with moderate precipitation and a desert state with low precipitation. This could explain the sudden

  13. 9 CFR 319.311 - Chow mein vegetables with meat, and chop suey vegetables with meat.

    2010-01-01

    ... 9 Animals and Animal Products 2 2010-01-01 2010-01-01 false Chow mein vegetables with meat, and chop suey vegetables with meat. 319.311 Section 319.311 Animals and Animal Products FOOD SAFETY AND INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE AGENCY ORGANIZATION AND TERMINOLOGY; MANDATORY MEAT AND POULTRY...

  14. Vegetative buffer strips for reducing herbicide transport in runoff: effects of buffer width, vegetation, and season

    The effect of vegetative buffer strip (VBS) width, vegetation, and season of the year on herbicide transport in runoff has not been well documented for runoff prone soils. A multi-year replicated plot-scale study was conducted on an eroded claypan soil with the following objectives: 1) assess the ef...

  15. Formalized classification of species-poor vegetation: a proposal of a consistent protocol for aquatic vegetation

    Landucci, F.; Tichý, L.; Šumberová, Kateřina; Chytrý, M.

    2015-01-01

    Roč. 26, č. 4 (2015), s. 791-803 ISSN 1100-9233 R&D Projects: GA ČR GB14-36079G Institutional support: RVO:67985939 Keywords : vegetation classification * vegetation database * Coctail method Subject RIV: EF - Botanics Impact factor: 3.151, year: 2015

  16. The Impact of the Rise in Vegetable Prices on Vegetable Producer Behavior–Based on the survey of vegetable producers in Jiayu, Hubei Province

    Liu Pan

    2015-01-01

    Full Text Available In order to study the impact of the rise in prices of vegetables on vegetable producers, and to increase the revenue of vegetable producers, this paper does a survey by anonymous sampling questionnaire. Results shows that: most vegetable growers think that vegetable prices should rise and would continue to rise, and that vegetable prices would increase their revenue, thus in the coming year they would expand the planting scale of vegetable variety whose increase rate is the largest in this year. But because of the increase of logistics costs and production costs, some farmers benefit very little from the rising trend of vegetable prices. Most farmers expect too much in the trend estimation of the prices of vegetables and also lack of planning and forward-looking in production, thus the planting area of single variety is often decided by the market of previous year. According to analysis of the impact of the rise in vegetable prices on vegetable producer behavior, this paper gives the following suggestions to increase revenue of vegetable producers: change the mode of thinking, improve rural information platform, and increase capital investment for vegetable production base.

  17. New Approaches to Irrigation Scheduling of Vegetables

    Michael D. Cahn

    2017-04-01

    Full Text Available Using evapotranspiration (ET data for scheduling irrigations on vegetable farms is challenging due to imprecise crop coefficients, time consuming computations, and the need to simultaneously manage many fields. Meanwhile, the adoption of soil moisture monitoring in vegetables has historically been limited by sensor accuracy and cost, as well as labor required for installation, removal, and collection of readings. With recent improvements in sensor technology, public weather-station networks, satellite and aerial imaging, wireless communications, and cloud computing, many of the difficulties in using ET data and soil moisture sensors for irrigation scheduling of vegetables can now be addressed. Web and smartphone applications have been developed that automate many of the calculations involved in ET-based irrigation scheduling. Soil moisture sensor data can be collected through wireless networks and accessed using web browser or smartphone apps. Energy balance methods of crop ET estimation, such as eddy covariance and Bowen ratio, provide research options for further developing and evaluating crop coefficient guidelines of vegetables, while recent advancements in surface renewal instrumentation have led to a relatively low-cost tool for monitoring crop water requirement in commercial farms. Remote sensing of crops using satellite, manned aircraft, and UAV platforms may also provide useful tools for vegetable growers to evaluate crop development, plant stress, water consumption, and irrigation system performance.

  18. Sobre Geoestatística e mapas

    Paulo Milton Barbosa Landim

    2015-06-01

    Full Text Available A Geologia, até há bem pouco tempo, era freqüentemente considerada uma ciência baseada em interpretações puramente qualitativas dos fenômenos geológicos. Nos últimos 40 anos, porém, tem sido notável a mudança da fase descritiva para a utilização de métodos quantitativos, principalmente na área da Geologia Aplicada. Entre tantos temas relacionados com a quantificação em Geologia o assunto abordado neste artigo, que pretende ser de cunho didático, diz respeito à aplicação da Geoestatística na confecção de mapas geológicos. Na primeira parte do trabalho é feita uma introdução sobre os aspectos quantitativos na interpretação dos fenômenos geológicos, em seguida conceitos básicos sobre a metodologia geoestatística e, na última parte, uma aplicação clássica da geoestatística linear, baseada nos conceitos de estacionaridade da covariância e do variograma, para a confecção de mapas.

  19. Estrategia educativa sobre sexualidad sana en adolescentes

    Carmen Olivera Carmenates

    Full Text Available Se realizó un estudio de intervención con el objetivo de elaborar una estrategia educativa para incrementar conocimientos sobre sexualidad sana en un grupo de adolescentes de la escuela Secundaria Básica Alfredo Gómez del Municipio Camagüey entre octubre de 2012 y febrero de 2013. La muestra fue de 37 estudiantes. Se aplicó una encuesta que se convirtió en el registro primario de datos, confeccionada según criterios de expertos y la bibliografía. Una vez analizados los resultados se procedió a diseñar la estrategia educativa y posteriormente a su evaluación. Los datos se procesaron de forma automatizada. Antes de aplicar la estrategia educativa se comprobó que los adolescentes no tenían un adecuado conocimiento sobre la sexualidad sana. Los resultados demuestran la importancia de los estudios de intervención.

  20. European Vegetation Archive (EVA): an integrated database of European vegetation plots

    Chytrý, M; Hennekens, S M; Jiménez-Alfaro, B

    2015-01-01

    vegetation- plot databases on a single software platform. Data storage in EVA does not affect on-going independent development of the contributing databases, which remain the property of the data contributors. EVA uses a prototype of the database management software TURBOVEG 3 developed for joint management......The European Vegetation Archive (EVA) is a centralized database of European vegetation plots developed by the IAVS Working Group European Vegetation Survey. It has been in development since 2012 and first made available for use in research projects in 2014. It stores copies of national and regional...... data source for large-scale analyses of European vegetation diversity both for fundamental research and nature conservation applications. Updated information on EVA is available online at http://euroveg.org/eva-database....

  1. Creación de una empresa de recogida selectiva y gestión de aceite vegetal usado

    Iribarren García, Iñigo

    2010-01-01

    Este proyecto trata sobre la creación de una empresa donde todo va a girar en torno a un producto principal: el aceite vegetal usado. A partir de ahí, en la empresa aparecen cuatro líneas de negocio independientes y a la vez relacionadas, que directa o indirectamente están ligadas con el aceite usado. Las cuatro líneas de trabajo van a ser una parte referente al servicio de recogida del aceite, actuación de la cual derivan otras dos de las cuatro líneas de negocio, como son la venta del aceit...

  2. FONTES PROTÉICAS DE ORIGEM VEGETAL EM DIETAS PARA JUVENIS DE CARPA HÚNGARA (Cyprinus carpio)

    Giovani Taffarel Bergamin

    2009-01-01

    O objetivo deste trabalho foi avaliar a resposta de diferentes fontes protéicas de origem vegetal em substituição à farinha de carne suína da dieta, sobre o crescimento, rendimento e qualidade de carcaça, parâmetros sangüíneos e avaliação sensorial dos filés de juvenis de carpa húngara. Foram realizados dois experimentos, utilizando sistema de recirculação de água com 15 unidades experimentais (280L). No experimento 1, foram avaliadas cinco dietas experimentais. Uma dieta controle (FCS) co...

  3. Vegetation extraction from high-resolution satellite imagery using the Normalized Difference Vegetation Index (NDVI)

    AlShamsi, Meera R.

    2016-10-01

    Over the past years, there has been various urban development all over the UAE. Dubai is one of the cities that experienced rapid growth in both development and population. That growth can have a negative effect on the surrounding environment. Hence, there has been a necessity to protect the environment from these fast pace changes. One of the major impacts this growth can have is on vegetation. As technology is evolving day by day, there is a possibility to monitor changes that are happening on different areas in the world using satellite imagery. The data from these imageries can be utilized to identify vegetation in different areas of an image through a process called vegetation detection. Being able to detect and monitor vegetation is very beneficial for municipal planning and management, and environment authorities. Through this, analysts can monitor vegetation growth in various areas and analyze these changes. By utilizing satellite imagery with the necessary data, different types of vegetation can be studied and analyzed, such as parks, farms, and artificial grass in sports fields. In this paper, vegetation features are detected and extracted through SAFIY system (i.e. the Smart Application for Feature extraction and 3D modeling using high resolution satellite ImagerY) by using high-resolution satellite imagery from DubaiSat-2 and DEIMOS-2 satellites, which provide panchromatic images of 1m resolution and spectral bands (red, green, blue and near infrared) of 4m resolution. SAFIY system is a joint collaboration between MBRSC and DEIMOS Space UK. It uses image-processing algorithms to extract different features (roads, water, vegetation, and buildings) to generate vector maps data. The process to extract green areas (vegetation) utilize spectral information (such as, the red and near infrared bands) from the satellite images. These detected vegetation features will be extracted as vector data in SAFIY system and can be updated and edited by end-users, such as

  4. Hidden vegetables: an effective strategy to reduce energy intake and increase vegetable intake in adults.

    Blatt, Alexandria D; Roe, Liane S; Rolls, Barbara J

    2011-04-01

    The overconsumption of energy-dense foods leads to excessive energy intakes. The substitution of low-energy-dense vegetables for foods higher in energy density can help decrease energy intakes but may be difficult to implement if individuals dislike the taste of vegetables. We investigated whether incorporating puréed vegetables to decrease the energy density of entrées at multiple meals reduced daily energy intakes and increased daily vegetable intakes. In this crossover study, 20 men and 21 women ate ad libitum breakfast, lunch, and dinner in the laboratory once a week for 3 wk. Across conditions, entrées at meals varied in energy density from standard versions (100% condition) to reduced versions (85% and 75% conditions) by the covert incorporation of 3 or 4.5 times the amount of puréed vegetables. Entrées were accompanied by unmanipulated side dishes. Participants rated their hunger and fullness before and after meals. Subjects consumed a consistent weight of foods across conditions of energy density; thus, the daily energy intake significantly decreased by 202 ± 60 kcal in the 85% condition (P kcal in the 75% condition (P Daily vegetable consumption significantly increased from 270 ± 17 g of vegetables in the 100% condition to 487 ± 25 g of vegetables in the 75% condition (P < 0.0001). Despite the decreased energy intake, ratings of hunger and fullness did not significantly differ across conditions. Entrées were rated as similar in palatability across conditions. Large amounts of puréed vegetables can be incorporated into various foods to decrease the energy density. This strategy can lead to substantial reductions in energy intakes and increases in vegetable intakes. This trial was registered at clinicaltrials.gov as NCT01165086.

  5. Australian consumer awareness of health benefits associated with vegetable consumption.

    Rekhy, Reetica; Khan, Aila; Eason, Jocelyn; Mactavish-West, Hazel; Lister, Carolyn; Mcconchie, Robyn

    2017-04-01

    The present study investigated the perceived health benefits of specific vegetable consumption to guide the use of nutrition and health claims on vegetable marketing collateral. Free elicitation and consumer ranking data were collected through an online survey of 1000 adults from across Australia and analysed for the perceived importance of vegetables in the daily diet, number of serves consumed per day, knowledge about health-related benefits of specific vegetables and perceived health benefits of vegetable consumption. The importance of vegetables in the diet and daily vegetable consumption was higher in people from an English-speaking background, females, people aged 45 years and over and people living in non-metropolitan areas. Digestion was selected as the major health benefit from consumption of specific vegetables. However, understanding of the health benefits of specific vegetable consumption was relatively low among consumers. Half of the respondents were not sure of the health benefits associated with specific vegetables, except for carrots and spinach. Some respondents volunteered nutrient content or other information. There was no clear indication that consumers understand the specific health benefits conferred by consumption of vegetables. Nutrient and health benefit labelling therefore has the capacity to enhance knowledge of vegetable consumers. It is recommended that health benefit labelling be tailored to promote greater consumption of vegetables in those demographic groups where vegetable consumption was lower. The present study assists the Australian vegetable industry in helping consumers make more informed consumption choices. © 2016 Dietitians Association of Australia.

  6. Flavonoids as fruit and vegetable intake biomarkers

    Krogholm, Kirstine Suszkiewicz

    of fruit and vegetable intakes. In Paper I, the urinary recovery of the 7 flavonoids in morning spot urine (i.e. all urine voids from midnight including the first morning void) was also found to respond to moderate increases in the intake of fruits and vegetables. However, the association was somewhat...... weaker than in 24h urine samples, indicating that the 24h urinary recovery of the 7 flavonoids is a stronger biomarker of the intake of fruit and vegetables than the urinary recovery of the 7 flavonoids in morning spot urine. In Paper II, the biokinetic profiles of some of the most important dietary......-individual variation in the absorption and urinary recovery of the flavonoids, and this makes it very difficult to separate individuals according to intake by use of the flavonoid biomarker in urine. The intra-individual variation was on the contrary low, and Paper II therefore supports the assumption, that 24h...

  7. Flavonoids as fruit and vegetable intake biomarkers

    Krogholm, Kirstine Suszkiewicz

    calculation of the bivariate correlation coefficients is the common approach when using only one reference method. Back in 2002, a strictly controlled dietary intervention study indicated that the sum of 7 different flavonoid aglycones excreted in 24h urine samples potentially could be used as a biomarker...... and cohort studies. The Ph.D. thesis contains four scientific papers. Paper I provides evidence that the sum of 7 flavonoids in 24h urine respond in a linear and sensitive manner to moderate increases in the intake of fruits and vegetables, and thus consolidates that the flavonoids are a valid biomarker...... of fruit and vegetable intakes. In Paper I, the urinary recovery of the 7 flavonoids in morning spot urine (i.e. all urine voids from midnight including the first morning void) was also found to respond to moderate increases in the intake of fruits and vegetables. However, the association was somewhat...

  8. The impact of spices on vegetable consumption

    Li, Zhaoping; Krak, Michael; Zerlin, Alona

    2015-01-01

    This pilot study was conducted to evaluate the impact of spices added to broccoli, cauliflower, and spinach on amount and rate of vegetable consumption. Twenty overweight subjects who routinely ate less than three daily servings of vegetables were recruited. On six occasions, subjects were assigned...... in random order to eat broccoli, cauliflower, or spinach with or without added spices. Dishes were placed on a modified Universal Eating Monitor (UEM) that recorded rate of eating (g/sec), duration of eating (min) and total amount consumed (g). Total intake and duration of eating were increased...... significantly for broccoli with spices compared to plain broccoli, but there was no significant difference for cauliflower or spinach. No significant differences were noted in any of the visual analog scale (VAS) responses. This study suggests that adding spices may increase vegetable intake, but more studies...

  9. Biological effects of fruit and vegetables.

    Dragsted, Lars O; Krath, Britta; Ravn-Haren, Gitte; Vogel, Ulla B; Vinggaard, Anne Marie; Bo Jensen, Per; Loft, Steffen; Rasmussen, Salka E; Sandstrom, The late BrittMarie; Pedersen, Anette

    2006-02-01

    A strong and persistent effect of plant-derived foods on the prevention of lifestyle diseases has emerged from observational studies. Several groups of constituents in plants have been identified as potentially health promoting in animal studies, including cholesterol-lowering factors, antioxidants, enzyme inducers, apoptosis inducers etc. In human intervention studies the dose levels achieved tend to be lower than the levels found to be effective in animals and sampling from target organs is often not possible. A controlled dietary human intervention study was performed with forty-three volunteers, providing 600 g fruit and vegetables/d or in the controls a carbohydrate-rich drink to balance energy intake. Surrogate markers of oxidative damage to DNA, protein and lipids, enzymic defence and lipid metabolism were determined in blood and urine. It was found that a high intake of fruit and vegetables tends to increase the stability of lipids towards oxidative damage. Markers of oxidative enzymes indicate a steady increase in glutathione peroxidase (GPX1) activity in erythrocytes during intervention with fruit and vegetables but there is no effect on GPX1 transcription levels in leucocytes. No change occurs in glutathione-conjugating or -reducing enzyme activities in erythrocytes or plasma, and there are no effects on the transcription of genes involved in phase 2 enzyme induction or DNA repair in leucocytes. Fruit and vegetable intake decreases the level of total cholesterol and LDL-cholesterol, but does not affect sex hormones. In conclusion, it has been shown that total cholesterol and LDL-cholesterol, markers of peripheral lipid oxidation, and erythrocyte GPX1 activity are affected by high intakes of fruit and vegetables. This finding provides support for a protective role of dietary fruit and vegetables against CVD.

  10. Riparian Vegetation Mapping Along the Hanford Reach

    FOGWELL, T.W.

    2003-01-01

    During the biological survey and inventory of the Hanford Site conducted in the mid-1990s (1995 and 1996), preliminary surveys of the riparian vegetation were conducted along the Hanford Reach. These preliminary data were reported to The Nature Conservancy (TNC), but were not included in any TNC reports to DOE or stakeholders. During the latter part of FY2001, PNNL contracted with SEE Botanical, the parties that performed the original surveys in the mid 1990s, to complete the data summaries and mapping associated with the earlier survey data. Those data sets were delivered to PNNL and the riparian mapping by vegetation type for the Hanford Reach is being digitized during the first quarter of FY2002. These mapping efforts provide the information necessary to create subsequent spatial data layers to describe the riparian zone according to plant functional types (trees, shrubs, grasses, sedges, forbs). Quantification of the riparian zone by vegetation types is important to a number of DOE'S priority issues including modeling contaminant transport and uptake in the near-riverine environment and the determination of ecological risk. This work included the identification of vegetative zones along the Reach by changes in dominant plant species covering the shoreline from just to the north of the 300 Area to China Bar near Vernita. Dominant and indicator species included Agropyron dasytachyudA. smithii, Apocynum cannabinum, Aristida longiseta, Artemisia campestris ssp. borealis var scouleriana, Artemisa dracunculus, Artemisia lindleyana, Artemisia tridentata, Bromus tectorum, Chrysothamnus nauseosus, Coreopsis atkinsoniana. Eleocharis palustris, Elymus cinereus, Equisetum hyemale, Eriogonum compositum, Juniperus trichocarpa, Phalaris arundinacea, Poa compressa. Salk exigua, Scirpus acutus, Solidago occidentalis, Sporobolus asper,and Sporobolus cryptandrus. This letter report documents the data received, the processing by PNNL staff, and additional data gathered in FY2002

  11. Radionuclide accumulation peculiarities demonstrated by vegetable varieties

    Kruk, A.V.; Goncharenko, G.G.; Kilchevsky, A.V.

    2004-01-01

    This study focused on ecological and genetic aspects of radionuclide accumulation demonstrated by a number of vegetable varieties. The researches resulted in determining the cabbage varieties which were characterised by the minimal level of radionuclide accumulation. It was shown that the above varieties manifested the relation between radionuclide accumulation and morphobiological characteristics such as vegetation period duration and yield criteria. The study specified the genotypes with high ecological stability as regards to radionuclide accumulation: 'Beloruskaya 85' cabbage and 'Dokhodny' tomato showed the best response to Cs 137, while 'Beloruskaya 85', 'Rusinovka', 'Amager 611' cabbage varieties and 'Sprint' tomato showed the minimal level of Sr 90 accumulation. (authors)

  12. A vegetation map for eastern Africa

    Lillesø, Jens-Peter Barnekow; van Breugel, Paulo; Graudal, Lars

    2015-01-01

    The potential natural vegetation (PNV) map of eastern and southern Africa covers the countries Burundi, Ethiopia, Kenya, Uganda, Rwanda, Tanzania, and Zambia. The first version of the map was developed by various partners in East Africa and Europe in 2010 and has now reached version 2. The map...... is available in different formats and is accompanied by an extensive documentation of the floristic, physiognomic and other characteristics of the different vegetation types and useful woody species in the 8 countries. It is complemented by a species selection tool, which can be used to 'find the right tree...

  13. Ultrasonic characterization of vegetable oil product

    Sidek Hj Abd Aziz; Chow Sai Pew; Abdul Halim Shaari; Nor Azizah Shaari

    1992-01-01

    The ultrasonic wave velocity and attenuation of a number vegetable oil products were measured using an ultrasonic pulse echo overlap technique from room temperature up to 90 0 C. Among the liquid samples studied were refined bleach deodorized (RED) palm oil, palm olein, coconut oil, corn oil and soya bean oil. The velocity of sound in vegetable oil products varies from about 1200 to 200 ms-1 and decrease linearly as the temperature increases. The ultrasonic properties of the oil are much dependent on their viscosity, density, relaxation effect and vibrational anharmonicity

  14. Pre-sowing irradiation of vegetable seeds

    Stoyanov, S

    1975-01-01

    Results are reported of trials with radiation stimulation of vegetable crops conducted under farm conditions in different regions. They were based on exact tests accomplished at the IGHB. Pre-sowing irradiation of seed increased the greenhouse yield of Extase tomato variety by 15%; it increased the yield of Triumph tomato variety under field conditions as well. The pepper variety Kourtovska Kapiya and eggplant variety Bulgarski 12, both grown from irradiated seed in open field produced 18% and 5.5% higher yields, respectively. Irradiation of vegetable seeds finds a large application in the farm practice.

  15. Risk elements in selected types of vegetables

    Ľuboš Harangozo

    2016-12-01

    Full Text Available Vegetable has an important role in human nutrition. Various parts of the plants have been part of the human diet since the beginning. Vegetables have a number of properties that make its consumption very healthful. It not only is a good source of vitamins, minerals and fiber but also contains protective components so called phytonutrients, has an antioxidant and antimicrobial effects. Daily intake of vegetables offers many health benefits, helps to improve health for example the function of digestive and immune system, reduces the risk of various diseases and so we should take care to its regular consumption. It is widely used, except that it is the basic raw material for the preparation of foods and is also an important raw material for the processing industry. Nowadays has become environmental pollution by heavy metals as a big problem. The contamination of water, soil as well as air pollution by heavy metals negatively affects agricultural production and production of non-harmful to health, safe and quality food, which may be adverse effects on human health. Therefore, it is important that we devote this issue more attention. The aim of this work was to identify and determine content of heavy metals in selected vegetables. Defined objectives have been achieved by analyzing of selected species samples of root from brassica vegetables: carrot (Daucus carota L. ssp. sativus, parsley (Petroselinum hortesne HOFFM conv. radicosum, kohlrabi (Brassica oleracea L. var. gongylodes, celery (Apium graveolens L. var. rapaceum and beetroot (Beta vulgaris L. var. conditiva ssp. vulgaris. The crops were bought in local market. The obtained results were compared with the results obtained from analyzes of vegetables that were grown in home conditions respectively from markets of local growers. All crops were grown in Slovak Republic. By using Varian AA 240FS and AAS method were analyzed the contents of risk metals in selected vegetables. It was confirmed that

  16. Fruit and Vegetable Consumption and Mortality

    Leenders, Max; Sluijs, Ivonne; Ros, Martine M

    2013-01-01

    % CI: 0.70, 1.54), and with a preventable proportion of 2.95%. This association was driven mainly by cardiovascular disease mortality (for the highest quartile, hazard ratio = 0.85, 95% CI: 0.77, 0.93). Stronger inverse associations were observed for participants with high alcohol consumption or high...... body mass index and suggested in smokers. Inverse associations were stronger for raw than for cooked vegetable consumption. These results support the evidence that fruit and vegetable consumption is associated with a lower risk of death....

  17. Straight Vegetable Oil as a Diesel Fuel?

    None

    2014-01-01

    Biodiesel, a renewable fuel produced from animal fats or vegetable oils, is popular among many vehicle owners and fleet managers seeking to reduce emissions and support U.S. energy security. Questions sometimes arise about the viability of fueling vehicles with straight vegetable oil (SVO), or waste oils from cooking and other processes, without intermediate processing. But SVO and waste oils differ from biodiesel (and conventional diesel) in some important ways and are generally not considered acceptable vehicle fuels for large-scale or long-term use.

  18. Pre-sowing irradiation of vegetable seeds

    Stoyanov, S.

    1975-01-01

    Results are reported of trials with radiation stimulation of vegetable crops conducted under farm conditions in different regions. They were based on exact tests accomplished at the IGHB. Pre-sowing irradiation of seed increased the greenhouse yield of Extase tomato variety by 15%; it increased the yield of Triumph tomato variety under field conditions as well. The pepper variety Kourtovska Kapiya and eggplant variety Bulgarski 12, both grown from irradiated seed in open field produced 18% and 5.5% higher yields, respectively. Irradiation of vegetable seeds finds a large application in the farm practice. (author)

  19. Simulations of Vegetation Impacts on Arctic Climate

    Bonfils, C.; Phillips, T. J.; Riley, W. J.; Post, W. M.; Torn, M. S.

    2009-12-01

    Because global warming disproportionately influences high-latitude climate, changes in arctic vegetation are in progress. These land-cover changes include redistribution of local vegetation types as well as northward migration of lower-latitude species in response to the increasing warming. The resulting displacement of low-lying tundra vegetation by shrubs and trees darkens the surface, thus accelerating regional warming. As participants in the U.S. Department of Energy IMPACTS Project, we are investigating the potential for abrupt arctic climatic change resulting from such variations in vegetation, among other mechanisms. To estimate the relative magnitudes of effects to be expected from changes in high-latitude land cover, we are conducting several numerical experiments with the Community Climate System Model (CCSM). These experiments include: 1) A “present-day-climate” control experiment with current atmospheric greenhouse-gas concentrations and climatological monthly sea surface temperatures and sea ice extents prescribed, and with “standard” CLM plant functional types (PFTs) specified; 2) A “changed-vegetation-type” experiment that is the same as 1), except that the “standard” PFTs are augmented by additional vegetation types (forbs, sedges, shrubs, mosses, and lichens) that are not presently represented in CLM. This experiment will require information on the location, fractional cover, and physiological parameterizations of these new PFTs. 3) A “changed-vegetation-extent experiment” that is the same as 2), except that the spatial extents of selected PFTs (e.g. shrubs or boreal forest PFTs) are shifted northward from their present locations in the CLM. We will report on the atmospheric climate and land-surface feedbacks associated with these vegetation changes, with emphasis on local and regional surface energy and moisture fluxes and near-surface temperature, humidity, and clouds. Acknowledgments This work was performed under the auspices

  20. Multispectral Imaging of Wok-Fried Vegetables

    Clemmensen, Line Katrine Harder; Dissing, Bjørn Skovlund; Hyldig, Grethe

    2012-01-01

    Quality control in the food industry is often performed by measuring various chemical compounds in the food involved. The authors propose an imaging concept for acquiring high-quality multispectral images to evaluate optical reflection changes in carrots and celeriac over a period of 14 days....... For comparison, sensory analysis was performed on the same samples. Prior to multispectral image recording, the vegetables were prefried and frozen at -30 °C for 4 months. During the 14 days of image recording, the vegetables were kept at +5 °C. In this period, surface changes and thereby reflectance properties...

  1. Nutrición vegetal (III).

    Moyeja Santana, Juan de Jesús

    2007-01-01

    Editorial. Suniaga Q., José La codorniz fuente proteica para consumo humano. Díaz Cuellar, Doraida R. y González, Diomary Diagnóstico de parásitos gastrointestinales en bovinos y su importancia en la productividad de los sistemas ganaderos. Castillo O., Mayela; Hernández, Javier A.; Betancourt, Arquímedes y Suniaga Q., José Nutrición vegetal (II). Moyeja Santana, Juan de Jesús Nutrición vegetal (III). Moyeja Santana, Juan de Jesús Plagas chupadoras de las cítrica...

  2. Nutrición vegetal (II).

    Moyeja Santana, Juan de Jesús

    2007-01-01

    Editorial. Suniaga Q., José La codorniz fuente proteica para consumo humano. Díaz Cuellar, Doraida R. y González, Diomary Diagnóstico de parásitos gastrointestinales en bovinos y su importancia en la productividad de los sistemas ganaderos. Castillo O., Mayela; Hernández, Javier A.; Betancourt, Arquímedes y Suniaga Q., José Nutrición vegetal (II). Moyeja Santana, Juan de Jesús Nutrición vegetal (III). Moyeja Santana, Juan de Jesús Plagas chupadoras de las cítrica...

  3. Un estudio sobre las investigaciones acerca de las ideas de los estudiantes en fuerza y movimiento A study on researches about students ideas on force and motion

    Silvia Giorgi

    2005-04-01

    Full Text Available Se llevó a cabo un análisis exhaustivo de publicaciones sobre preconcepciones o ideas iniciales referidas al tema "cuerpos en movimiento", también comúnmente denominado "fuerza y movimiento". Se estudiaron los aspectos teóricos, metodológicos y conceptuales involucrados en una muestra de investigaciones consistente en 36 trabajos publicados en revistas especializadas y en libros de distintas procedencias y autores. Los sujetos participantes en las investigaciones abarcan distintos niveles y tipos de instrucción. Los resultados revelan, por un lado la existencia de distintos objetivos, diferentes posturas asumidas por los investigadores con relación a las ideas iniciales, fuentes de datos utilizadas variadas, así como heterogeneidad en los resultados obtenidos y en su interpretación. Por otro lado, del estudio realizado surge que si bien los sujetos no poseen una conceptualización científica de fuerza, en las representaciones que ellos construyen de los fenómenos mecánicos podrían estar involucradas significaciones del término Fuerza asociadas a otras magnitudes físicas tales como cantidad de movimiento y energía. Se concluye en la necesidad de abordar el problema de las preconcepciones desde una nueva perspectiva tanto teórica como metodológica.An exhaustive analysis of publications about human preconceptions or initial ideas in regard to "bodies in movement" was carried out. Theoretical, methodological and conceptual aspects of a sample of 36 works on individuals of diverse levels of instruction and published in journals and books of different origins, were studied. Our findings revealed a great variety of goals as well as of postures assumed by the investigators with respect to preconceptions. Types of data sources as well as results and their interpretation showed also a great dispersion. From another point of view, the results of the present study suggest that although the subjects' conceptualization of force may be wrong

  4. Effects of vegetation structure on biomass accumulation in a Balanced Optimality Structure Vegetation Model (BOSVM v1.0

    Z. Yin

    2014-05-01

    Full Text Available A myriad of interactions exist between vegetation and local climate for arid and semi-arid regions. Vegetation function, structure and individual behavior have large impacts on carbon–water–energy balances, which consequently influence local climate variability that, in turn, feeds back to the vegetation. In this study, a conceptual vegetation structure scheme is formulated and tested in the new Balanced Optimality Structure Vegetation Model (BOSVM to explore the importance of vegetation structure and vegetation adaptation to water stress on equilibrium biomass states. Surface energy, water and carbon fluxes are simulated for a range of vegetation structures across a precipitation gradient in West Africa and optimal vegetation structures that maximize biomass for each precipitation regime are determined. Two different strategies of vegetation adaptation to water stress are included. Under dry conditions vegetation tries to maximize the water use efficiency and leaf area index as it tries to maximize carbon gain. However, a negative feedback mechanism in the vegetation–soil water system is found as the vegetation also tries to minimize its cover to optimize the surrounding bare ground area from which water can be extracted, thereby forming patches of vertical vegetation. Under larger precipitation, a positive feedback mechanism is found in which vegetation tries to maximize its cover as it then can reduce water loss from bare soil while having maximum carbon gain due to a large leaf area index. The competition between vegetation and bare soil determines a transition between a "survival" state to a "growing" state.

  5. Estimating fractional vegetation cover and the vegetation index of bare soil and highly dense vegetation with a physically based method

    Song, Wanjuan; Mu, Xihan; Ruan, Gaiyan; Gao, Zhan; Li, Linyuan; Yan, Guangjian

    2017-06-01

    Normalized difference vegetation index (NDVI) of highly dense vegetation (NDVIv) and bare soil (NDVIs), identified as the key parameters for Fractional Vegetation Cover (FVC) estimation, are usually obtained with empirical statistical methods However, it is often difficult to obtain reasonable values of NDVIv and NDVIs at a coarse resolution (e.g., 1 km), or in arid, semiarid, and evergreen areas. The uncertainty of estimated NDVIs and NDVIv can cause substantial errors in FVC estimations when a simple linear mixture model is used. To address this problem, this paper proposes a physically based method. The leaf area index (LAI) and directional NDVI are introduced in a gap fraction model and a linear mixture model for FVC estimation to calculate NDVIv and NDVIs. The model incorporates the Moderate Resolution Imaging Spectroradiometer (MODIS) Bidirectional Reflectance Distribution Function (BRDF) model parameters product (MCD43B1) and LAI product, which are convenient to acquire. Two types of evaluation experiments are designed 1) with data simulated by a canopy radiative transfer model and 2) with satellite observations. The root-mean-square deviation (RMSD) for simulated data is less than 0.117, depending on the type of noise added on the data. In the real data experiment, the RMSD for cropland is 0.127, for grassland is 0.075, and for forest is 0.107. The experimental areas respectively lack fully vegetated and non-vegetated pixels at 1 km resolution. Consequently, a relatively large uncertainty is found while using the statistical methods and the RMSD ranges from 0.110 to 0.363 based on the real data. The proposed method is convenient to produce NDVIv and NDVIs maps for FVC estimation on regional and global scales.

  6. [Effects of road construction on regional vegetation types].

    Liu, Shi-Liang; Liu, Qi; Wang, Cong; Yang, Jue-Jie; Deng, Li

    2013-05-01

    As a regional artificial disturbance component, road exerts great effects on vegetation types, and plays a substantial role in defining vegetation distribution to a certain extent. Aiming at the tropical rainforest degradation and artificial forest expansion in Yunnan Province of Southwest China, this paper analyzed the effects of road network extension on regional vegetation types. In the Province, different classes of roads had different effects on the vegetation types, but no obvious regularity was observed in the effects on the patch areas of different vegetation types due to the great variations of road length and affected distance. However, the vegetation patch number was more affected by lower class roads because of their wide distribution. As for different vegetation types, the vegetations on cultivated land were most affected by roads, followed by Castanopsis hystrix and Schima wallichii forests. Road network formation contributed most to the vegetation fragmentation, and there existed significant correlations between the human disturbance factors including village- and road distributions.

  7. Contribución al estudio integral de las laderas del Valle, serie: comunidad vegetal sobre suelos erosionados

    Escobar Eugenio

    1989-12-01

    Full Text Available Se llevó a cabo el inventario florístico en áreas críticas de erosión establecidas según estudios realizados por la Corporación Autónoma Regional del Cauca (CVC, en la vertiente oriental de la Cordillera Occidental, asociaciones de suelos: Dagua, Diamantina y Pescador-Zanjón seco; alturas entre 850 y 1200 m s n m. Se describió los hábitos de las especies inventariadas así como la caracterización morfológica del sistema radical. Las especies se agruparon en seis (6 categorías de acuerdo con el tipo de raíz siguiendo la metodología propuesta por J.E. Weaver (1958 con algunas modificaciones propuestas por los autores de este trabajo. El tipo de raíz que agrupó mayor número de especies es el 111(28 y el de menor número de especies fue, el VI (11. La familia Graminae presentó el mayor número de especies (30 seguida de Leguminosae (18 y Compositae (13 El hábito de crecimiento erecto fue el más característico seguido por los hábitos postrado y decumbente.The blossom inventory was carried out in the critical areas of erosion established by Corporation Autonoma Regional del Cauca (CVC, according to studies developed. This area is placed at the eastern waterfall in the western chain of mountains (Cordillera Occidental. Soil associations are Dagua, Diamantina and Pescador - Zanjon seco. The customs in the species, which were put into an inventory, as well as the morphological eatures of the root system were reviewed. The species were clasified in six (8 groups or types according to the kind of roots, following the methodology proposed by J. E. Weaver (1958 and some modifications proposed by the authors of this thesis. The type of root which grouped together the largest number of species was type 111(28 and the one which grouped the smallest number of species was type VI (11. The Graminea family showed the greatest number of species (30, followed by the Leguminosae and the Compositae (18 and 13 respectively. The erecter growth custom was the most predominant followed by the postrate one and the decumbent one.

  8. Heavy Metals Accumulation Characteristics of Vegetables in Hangzhou City, China

    GU Yan-qing

    2015-08-01

    Full Text Available A field survey of heavy metal concentrations in soils and vegetables grown in 30 vegetable farmlands of Hangzhou City were carried out. Through calculating the bioconcentration factor(BCFand transfer factor(TFfor different heavy metals(Cu, Zn, Cd, Cr and Pbin 27 kinds of different vegetables which belong to leafy vegetables, root vegetables or eggplant fruit vegetables, assessing their accumulation characteristics of heavy metals according to the differences of the bio-concentration factor, the reasonable proposals were put forward to optimize the planting structure of vegetables in mild and middle-level heavy metal contamination soils. The experimental results were as follows: In soils with mild and middle-level heavy metal contamination, leafy vegetables, such as crown daisy, cabbage, celery and Chinese long cabbage, had relatively low enrichment ability of heavy metals, so as the root and fruit vegetables like white radish, carrot, tomatoes, hence these vegetables could be planted preferentially. In contrast, some kinds of vegetables, including white amaranth, red amaranth, tatsoi, broccoli, gynura, brassica juncea and lettuce of leafy vegetables, lactuca sativa, taro, red radish and cherry radish of rhizome vegetables and sweet pepper of fruit vegetables, had relatively high accumulation ability of heavy metal, which should be avoided to be planted in soils with mild and middle-level heavy metal contamination.

  9. Apuntes sobre el Cultivo del Cacao

    Ochoa Horacio

    1940-03-01

    Full Text Available Por muchos años permaneció el cultivo del cacao en nuestro país, en un deplorable atraso técnico; el agricultor a duras penas si tenía conocimientos generales de su explotación y, de una industria que tuvo su auge debido a la extensividad de las plantaciones, hoy sólo resta una reducida porción de ella. ¿Qué factores operaron esa tan notoria reducción hasta el punto de que exportadores en otros tiempos nos convertimos en importadores obligados de ese producto? Hay muchas razones de orden técnico y de orden económico. Los cacaotaleros obtenían halagadoras retribuciones cuando el jornal consistía en la alimentación que se le daba a la peonada y cuando, generoso, añadía una sobretasa en dinero. Bajo ese sistema de explotación, el descuadre que pudiera ocasionar tanto las enfermedades criptogámicas como los plagas, no era suficiente como para provocar el pesimismo en el hacendado y por tanto inducirlo al abandono de la plantación. A medida que las condiciones sociales del campesino se fueron modificando y su standard de vida aumentaba, cambió fundamentalmente el mecanismo de la industria Se observó entonces que los árboles morían y que era pobre la producción; que lo que en tiempos pasados fuera un negocio lucrativo, se les había convertido en una actividad improductiva y, para controlar estos fenómenos que se generalizaban en todas las zonas cacaotaleras, opusieron la ignorancia, el rutinarismo y la desidia. Lentamente se han ido modificando los conceptos antiguos sobre el trabajo cultural y los cuidados que con relación a las enfermedades y plagas requiere este delicado cultivo; la rutina está echando paso atrás y las experiencias científicas que procuran la prosperidad del plantío, se ponen en práctica en algunas zonas . Esto da esperanza para la reconstitución de la industria cacaotalera en nuestro país, que cuenta con inmensas regiones de óptima calidad para hacerla florecer sobre bases nuevas, con

  10. Sobre a moralidade do direito em Kant

    Joãosinho Beckenkamp

    2009-07-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2009v8n1p63 Na atual literatura sobre a fi losofi a prática de Kant há uma tendência a negligenciar a distinção feita na Metaphysik der Sitten entre direito (Jus e ética (Ethica, a ponto de ser a doutrina do direito de Kant vista como uma mera aplicação do imperativo categórico. Este artigo procura mostrar que Kant apresenta em sua doutrina do direito uma série de argumentos que logram estabelecer o direito de modo inteiramente independente da ética.

  11. Zubiri et alii sobre la consciencia

    Solari, Enzo

    2016-08-01

    Full Text Available In recent literature on science and philosophy related to consciousness, the description and analysis are not always appropriate for the phenomenical consciousness that one wants to explain. From this one can sustain, contrary to some approaches to neuroscience and analytic philosophy, that the fact of consciousness previously requires a better phenomenological description and a more precise conceptual analysis.En la reciente literatura científica y filosófica sobre la consciencia no siempre se describe ni analiza adecuadamente cuál es esa consciencia fenoménica que se desea explicar. De ahí que se argumente, contra ciertas aproximaciones de la neurociencia y la filosofía analítica, que el hecho de la consciencia necesita previamente de una mejor descripción fenomenológica y de una más ajustada analítica conceptual.

  12. Notas de historia sobre ética

    Hernando Forero Caballero

    1998-01-01

    La primera reglamentación de que se tiene noticia sobre la profesión médica es la dictada por el rey Hamurabi de Babilonia, en la cual se protocolizó el códice que lleva su nombre, hacia los 2000 años antes de Cristo. En el Egipto antigua, los libros Herméticos del Dios Thoh contenían profundos preceptos de moral médica y conceptos científicos importantes de la medicina de entonces. En Persia y Arabia, los libros  Zendavesta y Vendia contenían principios de deontología médica, lo mismo que en...

  13. Reflexiones sobre contabilidad privada y contabilidad nacional

    José Arturo Gutiérrez

    1995-01-01

    Full Text Available Se discuten las interrelaciones de la contabilidad privada y la contabilidad nacional, insistiendo en sus condicionantes internos contradictorios en relación con la sobredeterminación de la formación económico-social vigente. En relación con ello se introduce la reflexión sobre la unidad contradictoria entre empresa y capital, esto es, la base técnica frente a su determinante socioeconómico, conflicto que la propia contabilidad privada expresa: al describir el capital aporta necesariamente el conocimiento de la producción social. De allí su probable compatibilidad con el propósito de la contabilidad nacional, y, por extensión, ambiental.

  14. IMPRESSÕES SOBRE A JORNADA

    Gabrie Rodrigues da Silva

    2012-07-01

    Full Text Available Entre os dias 10 e 13 de Outubro de 2008 ocorreu na Universidade Federal de Goiás – UFG campus de Catalão a IX Jornada sobre o Trabalho. Evento realizado anualmente pelo CEGeT (Centro de Estudos de Geografia do Trabalho, da UNESP/FCT campus de P. Prudente. No entanto, no ano de 2006 foi realizado na UNIOESTE campus de Marechal Cândido  Rondon/PR, através da iniciativa do Geolutas (Grupo de Estudos das Lutas no Campo e na Cidade que se prontificou a iniciar uma nova fase do evento, a de migração para outras Universidades, onde existem as células do CEGeT.

  15. Sobre el Boletín

    Andrés Arias

    2007-04-01

    Full Text Available En la página de Internet de la Biblioteca Luis Ángel Arango se indica que una de la funciones principales del Boletín es la de reseñar la novedades bibliográfica que van apareciendo en el país. "Novedades": de lo nuevo, tanto en las publicaciones como en las reseñas. Es decir, si lo que asegura la página de la Biblioteca es cierto, quien se acerca al Boletín debe encontrarse con comentarios recientes sobre libros recientes. Con guía que le ayuden a elegir entre las mil ofertas que hay en el mercado bibliográfico. Pero bien sabemos que este objetivo no se cumple.

  16. Notas de historia sobre ética

    Hernando Forero Caballero

    1998-01-01

    Full Text Available La primera reglamentación de que se tiene noticia sobre la profesión médica es la dictada por el rey Hamurabi de Babilonia, en la cual se protocolizó el códice que lleva su nombre, hacia los 2000 años antes de Cristo. En el Egipto antigua, los libros Herméticos del Dios Thoh contenían profundos preceptos de moral médica y conceptos científicos importantes de la medicina de entonces. En Persia y Arabia, los libros  Zendavesta y Vendia contenían principios de deontología médica, lo mismo que en el Código de Manu de las Indias y en los libros de la época de Confucio en la China.

  17. Consumer Acceptance Comparison Between Seasoned and Unseasoned Vegetables.

    Feng, Yiming; Albiol Tapia, Marta; Okada, Kyle; Castaneda Lazo, Nuria Blanca; Chapman-Novakofski, Karen; Phillips, Carter; Lee, Soo-Yeun

    2018-02-01

    Recent findings show that approximately 87% of the U.S. population fail to meet the vegetable intake recommendations, with unpleasant taste of vegetables being listed as the primary reason for this shortfall. In this study, spice and herb seasoning was used to enhance palatability of vegetables, in order to increase consumer acceptance. In total, 749 panelists were screened and recruited as specific vegetable likers of the vegetable being tested or general vegetable likers. Four sessions were designed to evaluate the effect of seasoning within each type of vegetable, including broccoli, cauliflower, carrot, and green bean. Each panelist was only allowed to participate in one test session to evaluate only one vegetable type, so as to mitigate potential learning effect. Overall, the results showed that seasoned vegetables were significantly preferred over unseasoned vegetables (P trend of seasoned vegetable being preferred remained. The findings from this study demonstrate the effect of seasoning in enhancing consumer liking of vegetables, which may lead to increased consumption to be assessed in future studies. To improve the sensory properties of vegetables, masking the bitter taste of vegetables using spice and herb seasoning are gaining increasing attention. Our findings suggest that the overall liking of vegetables could be improved by incorporating spice and herb seasonings that are specifically formulated for each vegetable. Ultimately, developing and commercializing spice and herb seasonings may aid to increase vegetable consumption, as well as expanding the vegetable seasoning market. © 2018 The Authors Journal of Food Science published by Wiley Periodicals, Inc. on behalf of Institute of Food Technologists.

  18. Influence of uranium and lead upon vegetation

    Stoklasa, M J

    1913-01-01

    Experiments were performed to determine the effects of radioactive waters on the growth and production of vegetables. Results show that small amounts of radioactive uranium, lead, and radium have a beneficial effect upon the germination and growth of plants. Although uranium is the strongest source of energy, it had less effect than radium.

  19. Nigerian women reap benefits from indigenous vegetables

    Working in four administrative states in south- western Nigeria, the Sustainable Production and Utilization of Underutilized Nigerian. Vegetables to Enhance Rural .... children's school fees and health care needs of the family. This will continue to sustain their use of improved production and cultivation once the project has ...

  20. A MODIS-based vegetation index climatology

    Our motivation here is to provide information for the NASA Soil Moisture Active Passive (SMAP) satellite soil moisture retrieval algorithms (launch in 2014). Vegetation attenuates the signal and the algorithms must correct for this effect. One approach is to use data that describes the canopy water ...

  1. Vegetables, Soups, Sauces, Gravies and Beverages.

    Marine Corps Inst., Washington, DC.

    Developed as part of the Marine Corps Institute (MCI) correspondence training program, this course on vegetables, soups, sauces, gravies, and beverages is designed to increase Marine Corps cooks' effectiveness as food handlers, using the proper techniques in the preparation of these items. Introductory materials include specific information for…

  2. Building the United States National Vegetation Classification

    Franklin, S.B.; Faber-Langendoen, D.; Jennings, M.; Keeler-Wolf, T.; Loucks, O.; Peet, R.; Roberts, D.; McKerrow, A.

    2012-01-01

    The Federal Geographic Data Committee (FGDC) Vegetation Subcommittee, the Ecological Society of America Panel on Vegetation Classification, and NatureServe have worked together to develop the United States National Vegetation Classification (USNVC). The current standard was accepted in 2008 and fosters consistency across Federal agencies and non-federal partners for the description of each vegetation concept and its hierarchical classification. The USNVC is structured as a dynamic standard, where changes to types at any level may be proposed at any time as new information comes in. But, because much information already exists from previous work, the NVC partners first established methods for screening existing types to determine their acceptability with respect to the 2008 standard. Current efforts include a screening process to assign confidence to Association and Group level descriptions, and a review of the upper three levels of the classification. For the upper levels especially, the expectation is that the review process includes international scientists. Immediate future efforts include the review of remaining levels and the development of a proposal review process.

  3. Vegetable Consumption patterns in Yaounde, Cameroon | Kamga ...

    A survey was conducted in August and September 2008 in Yaoundé, Cameroon to assess vegetable consumption attitudes, constraints and factors that stimulate households' consumption. Stratified sample based on district size, socioeconomic status and ethnics groups were used. Three hundred households were ...

  4. Health promoting compounds in vegetables and fruits:

    Brandt, K.; Christensen, L.P.; Hansen-Møller, J.

    2004-01-01

    Vegetables contain unknown compounds with important health promoting effect. The described project defined and tested a two-step screening procedure for identification of such compounds. Step 1 is initial screening according to three criteria: 1.1, chemically reactive functional groups; 1...

  5. 8518 CONSUMPTION OF LEAFY VEGETABLES IN RURAL ...

    Michael

    2014-03-01

    Mar 1, 2014 ... The head of the household was interviewed and question items ... crops which include alfalfa, wheat and barley with edible leaves are known [5]. .... vegetables for minimum loss of water-soluble nutrients, in spite of the high ...

  6. METHANE PHYTOREMEDIATION BY VEGETATIVE LANDFILL COVER SYSTEMS

    Landfill gas, consisting of methane and other gases, is produced from organic compounds degrading in landfills, contributes to global climate change, is toxic to various types of vegetation, and may pose a combustion hazard at higher concentrations. New landfills are required to ...

  7. Continuous wok-frying of vegetables:

    Adler-Nissen, Jens

    2007-01-01

    of loosely bound water from the vegetables allows the products to be frozen and re-heated without drip loss, and it is also an advantage when using them as ingredients in composite foods, such as pâtés. Examples developed by a professional chef indicate that he saved up to half of the cooking time compared...

  8. Fruit and vegetable films and uses thereof

    The present invention is directed to monolayer, bilayer, and multilayer films made from fruit, vegetable or a combination thereof, which films have the thinness, strength, flexibility and crispness to serve as alternates or substitutes for seaweed-based films such as nori, while providing nutrition ...

  9. SOLID BIOFUEL UTILIZATION IN VEGETABLE OIL PRODUCTION

    Slusarenko V.

    2016-08-01

    Full Text Available The paper deals with questions of creating at JSC “Alimentarmash "in the last 20 years the technological equipment for the production of vegetable oils from oilseeds: from the press for the final spin to mini oilfactory, using as an energy source for heating the liquid coolant (Thermal oil "Arian" of solid biofuels - husk of sunflower seeds.

  10. Regional vegetation management standards for commercial pine ...

    Although the understanding gained from these trials allowed for the development of vegetation management standards, their operational and economic viability need to be tested on a commercial basis. Four pine trials were thus initiated to test the applicability of these standards when utilised on a commercial scale. Two of ...

  11. Willow vegetation filters: Principles, results and economy

    Perttu, K.

    1996-01-01

    During recent years, it has become obvious that it is both environmentally and economically appropriate to use vegetation filters of different short rotation willows (Salix spp.) to purify water and soil. Swedish experiences of vegetation filter efficiencies have been demonstrated in several laboratory, field lysimeter, and full-scale experiments. However, there are still many questions to be answered, for example, how the uptake and allocation mechanisms of heavy metals and recalcitrant organic constituents function, or which maximum doses are possible in a particular situation without any risk of leachate losses. As far as plant nutrition is concerned, the past two decades of integrated research in Sweden have demonstrated that the willows have capacity for efficient uptake both of macro and micro nutrients, which is reflected in their high productivity. The purpose of this paper is to present some results on how vegetation filter stands of willow, irrigated with municipal wastewater, can function as purification plants, while at the same time producing fuelwood. This twofold utilization benefits both the environment and the economy. Treatment plants for wastewater purification using various types of vegetation filters have been tried in Sweden. The experiences consider both the nutrient and heavy metal uptake, and the whole process chain from establishment, cultivation and harvesting of the wastewater irrigated willow stands, to the utilization of the wood in heating plants. 33 refs, 5 tabs

  12. Remote sensing of vegetation dynamics in drylands

    Tian, Feng; Brandt, Martin Stefan; Liu, Yi Y.

    2016-01-01

    Monitoring long-term biomass dynamics in drylands is of great importance for many environmental applications including land degradation and global carbon cycle modeling. Biomass has extensively been estimated based on the normalized difference vegetation index (NDVI) as a measure of the vegetatio...

  13. Sustainable Production of Underutilized Vegetables to Enhance ...

    ... Research Fund (CIFSRF), a joint program of IDRC and the Canadian International Development Agency (CIDA) - aims to increase the food security and economic empowerment of resource-poor rural women farmers in Nigeria through the cultivation, processing, consumption and marketing of underutilized vegetables.

  14. Weeds as important vegetables for farmers

    Cruz Garcia, G.S.; Price, L.L.

    2012-01-01

    The objective of this study was to investigate the multiple uses and cognitive importance of edible weeds in Northeast Thailand. Research methods included focus group discussions and freelistings. A total of 43 weeds consumed as vegetable were reported, including economic, naturalized, agricultural

  15. Vegetable oils as lube basestocks: A review

    anjanas

    2013-02-27

    Feb 27, 2013 ... widespread use of natural oils and fats. Vegetable oils are promising candidates as base ... Synthetic esters form a large group of products, which can be either from petrochemical or oleo chemical ... In order to combine the environmental behavior and the technical properties of lubricants, a lot of countries ...

  16. Infection potential of vegetative incompatible Ganoderma boninense ...

    LiP), manganese peroxidase (MnP) and laccase to degrade the lignin composition in plant cell walls. The present study aimed to evaluate the infection potential of vegetative incompatible isolates of G. boninense in causing Basal Stem Rot ...

  17. Mathematical Modeling of Flow Through Vegetated Regions

    2013-08-01

    of Illinois at Urbana - Champaign, 1996. [24] M.J. Dwyer, E.G. Patton, and R.H. Shaw. Turbulent kinetic energy budgets from a large-eddy simulation of...retardance in vegetated channels. Journal of the Irrigation and Drainage Division, ASCE, 96:351–357, 1970. [33] W.H. Graf and S.C. Ko. Tests on cylinders

  18. The market for vegetables in North Vietnam

    Wijk, S.; Everaarts, A.P.

    2007-01-01

    The purpose of this project is first to develop the technical oppertunities for vegetable cultivation in the Hoa Binh highlands, and later to establish the ways and means for marketing of the product. To get some first insights in the marketing possibilities, a desk study was carried out of the

  19. Optimization of lamp spectrum for vegetable growth

    Prikupets, L.B.; Tikhomirov, A.A. [Institute of Biophysics, Krasnoyarsk (Russian Federation)

    1994-12-31

    Commmercial light sources were evaluated as to the optimum conditions for the production of tomatoes and cucumbers. Data is presented which corresponds to the maximum productivity and optimal spectral ratios. It is suggested that the commercial light sources evaluated were not efficient for the growing of the vegetables.

  20. Coatings for minimally processed fruits and vegetables

    Fresh-cut fruit and vegetables are gaining increasing popularity and market share. Techniques to enhance stability of fresh cut produce are reviewed. Among these techniques, edibles coatings can provide protection against dehydration, microbial decay and decrease events related to physiological sene...

  1. Minimally processed vegetable salads: microbial quality evaluation.

    Fröder, Hans; Martins, Cecília Geraldes; De Souza, Katia Leani Oliveira; Landgraf, Mariza; Franco, Bernadette D G M; Destro, Maria Teresa

    2007-05-01

    The increasing demand for fresh fruits and vegetables and for convenience foods is causing an expansion of the market share for minimally processed vegetables. Among the more common pathogenic microorganisms that can be transmitted to humans by these products are Listeria monocytogenes, Escherichia coli O157:H7, and Salmonella. The aim of this study was to evaluate the microbial quality of a selection of minimally processed vegetables. A total of 181 samples of minimally processed leafy salads were collected from retailers in the city of Sao Paulo, Brazil. Counts of total coliforms, fecal coliforms, Enterobacteriaceae, psychrotrophic microorganisms, and Salmonella were conducted for 133 samples. L. monocytogenes was assessed in 181 samples using the BAX System and by plating the enrichment broth onto Palcam and Oxford agars. Suspected Listeria colonies were submitted to classical biochemical tests. Populations of psychrotrophic microorganisms >10(6) CFU/g were found in 51% of the 133 samples, and Enterobacteriaceae populations between 10(5) and 106 CFU/g were found in 42% of the samples. Fecal coliform concentrations higher than 10(2) CFU/g (Brazilian standard) were found in 97 (73%) of the samples, and Salmonella was detected in 4 (3%) of the samples. Two of the Salmonella-positive samples had minimally processed vegetables had poor microbiological quality, and these products could be a vehicle for pathogens such as Salmonella and L. monocytogenes.

  2. Zur Flora und Vegetation des Jeschkenkammes

    Petřík, Petr; Višňák, R.

    2006-01-01

    Roč. 14, - (2006), s. 127-140 ISSN 0941-0627 R&D Projects: GA AV ČR IAA6005202 Institutional research plan: CEZ:AV0Z60050516 Keywords : phytogeography * potential natural vegetation * nature conservation Subject RIV: EF - Botanics

  3. Multispectral imaging of wok fried vegetables

    Løje, Hanne; Dissing, Bjørn Skovlund; Clemmensen, Line Katrine Harder

    2011-01-01

    This paper shows how multispectral images can be used to assess color change over time in wok fried vegetables. We present results where feature selection was performed with sparse methods from the multispectral images to detect the color changes of wok fried carrots and celeriac stored at +5°C...

  4. Phytostabilization of metals by indigenous riparian vegetation ...

    When measured against an ideal hypothetical buffer zone, the buffer zones under investigation varied between intact and severely compromised. Intact riparian zones showed elevated metal concentrations in the soil, yet significantly lower concentrations in the river water compared to areas with insufficient vegetative cover ...

  5. Vermicomposting of Vegetable Wastes Using Cow Dung

    K. Muthukumaravel

    2008-01-01

    Full Text Available Municipal solid wastes are mainly from domestic and commercial areas containing recyclable toxic substances, compostable organic matter and others. With rapid increase in population, the generation of municipal solid wastes has increased several folds during last few years. Disposal of solid wastes can be done by methods like land filling, incineration, recycling, conversion into biogas, disposal into sea and composting. Vermicomposting is one of the recycling technologies which will improve the quality of the products. The present study aims to find out the possibility of utilization of vegetable wastes for vermiculture. Earthworm Megascolex mauritii cultured in plastic trays (45 x 30 x 30 cm containing soil alone (control (T1, soil + cow dung (T2, soil + vegetable waste (T3 and soil + vegetable waste + cow dung (T4 for 60 days. Nutrient values were determined from the compost and compared with that of the control. From these results, it was found that NPK values were maximum in compost obtained from vegetable waste with the use of cow dung.

  6. Remote sensing applications for monitoring rangeland vegetation ...

    Remote sensing techniques hold considerable promise for the inventory and monitoring of natural resources on rangelands. A significant lack of information concerning basic spectral characteristics of range vegetation and soils has resulted in a lack of rangeland applications. The parameters of interest for range condition ...

  7. High pressure effects on fruits and vegetables

    Timmermans, R.A.H.; Matser, A.M.

    2016-01-01

    The chapter provides an overview on different high pressure based treatments (high pressure pasteurization, blanching, pressure-assisted thermal processing, pressure-shift freezing and thawing) available for the preservation of fruits and vegetable products and extending their shelf life. Pressure

  8. Recycling of uranium by a perennial vegetation

    Thiry, Y.

    2005-01-01

    At sites of large scale mining and processing of uranium ore, tailings and waste rock piles are today the most visible relics of the uranium extractive industry. These mining relics are constantly subjected to weathering and leaching processes causing the dissemination of radioactive and toxic elements and sometimes requiring remedial operations. The in situ remediation of waste rock piles usually includes their revegetation for minimizing the water infiltration and for increasing surface soil stability. Thanks to its biomass density and longevity, the perennial vegetation plays an important role in stabilisation of the water cycling. The buffer role of forest vegetation can reduce water export from watersheds as well as erosion and hydrological losses of chemicals including radionuclides from contaminated sites. If long term reduction of contaminant dispersion at revegetated uranium mining sites is to be fully appreciated, then the extent of radioactive contaminant availability to forest vegetation and ecosystem cycling as well as the possible economic valorisation of the woody products must be considered. Concerned study focused on a Scots pine plantation established 35 years ago on a uranium waste rock pile (Wismuth GmbH) situated near Schlema (Germany). This investigation aimed at quantifying the mobility of uranium in the mining debris and its transport to the different tree compartments with emphasis on the processes involved. The influence of pine vegetation on uranium cycling dynamics was further assessed in terms of annual fluxes)

  9. Genetic characterization of two traditional leafy vegetables ...

    Genetic characterization of two traditional leafy vegetables (Sesamum radiatum Thonn. ex Hornem and Ceratotheca sesamoides Endl.) of Benin, using flow cytometry and amplified fragment length polymorphism (AFLP) markers. K Adéoti, A Rival, A Dansi, S Santoni, S Brown, T Beule, A Nato, Y Henry, R Vodouhe, L Loko, ...

  10. Vermicomposting of vegetable waste: A biophysicochemical process ...

    some cities, the organic waste (market, municipal, household) are dumped indiscriminately or littered on the streets causing environmental deterioration. Biological processes such as composting followed by vermicomposting to convert vegetables waste (as valuable nutrient source) in agriculturally useful organic fertilizer ...

  11. Notas sobre Matisia longiflora Gleas. (Bombacaceae Notas sobre Matisia longiflora Gleas. (Bombacaceae

    Fernández Alonso José Luis

    1992-09-01

    Full Text Available Dentro del grupo de géneros de bombacáceas de hojas simples que componen la tribu Quararibeae (= Matisieae Hutchinson, es Matisia Humb. & Bonpl. el que cuenta con mayor número de especies en Colombia. Al respecto se presentaron recientemente algunas consideraciones preliminares sobre la diversidad de especies en este grupo en Colombia (Fernández Alonso, 1991.

  12. Semi-Dried Fruits and Vegetables

    Gamze Uysal Seçkin

    2015-12-01

    Full Text Available Since ancient times, the preservation of fruit and vegetables is an ancient method of drying. Sun drying method has been used more widely. In general, consumer-ready products are dried fruits, while the dried vegetables are the foods subjected to the rehydration processes such as boiling, heating and baking before consumption. In recent years, new products with high eating quality have been attempted to achieve without losing characteristic of raw material. With the improving of food technology, using developed methods (pH reduction with reducing aw, slight heating, preservatives use etc. as protective agent, and using a combination of a low rate as an alternative to traditional food preservation process, products have been obtained without changing original characteristics of food. ‘Semi-dried 'or 'medium moist 'products with little difference between the taste and texture of the product with a damp have gained importance in recent years in terms of consumer preferences. Vegetables or fruits, which have water activity levels between 0.50 and 0.95 and the moisture content of between 26% and 60%, are called 'medium moist fruit or vegetables'. Two different manufacturing process to obtain a semi-dried or intermediate moisture products are applied. First, fully dried fruits and vegetables to be rehydrated with water are brought to the desired level of their moisture content. Second, in the first drying process, when the product moisture content is reduced to the desired level, the drying process is finished. The semi-dried products are preferred by consumers because they have a softer texture in terms of eating quality and like fresh products texture.

  13. Dry deposition of radionuclides on leafy vegetables

    Heuberger, H.; Tschiersch, J.; Shinonaga, T.; Bunzl, K.; Pliml, A.; Dietl, F.; Keusch, M.

    2004-01-01

    The dry deposition of gaseous elemental radio-iodine and particulate radio-caesium on mature leafy vegetable was studied in chamber experiments. The simultaneous exposition of endive, head lettuce, red oak leaf lettuce and spinach (spring leafy vegetable) rsp. curly kale, white cabbage and spinach (summer leafy vegetable) was performed under homogeneous and controlled conditions. The sample collective of each species was such large that for the expected variation of the results a statistically firm analysis was possible. Significant differences were observed for the 131 I deposition on spring vegetable: the deposition on spinach was roughly 3times that on leaf lettuce, 4times that on endive and 9times that on head lettuce. For 134 Cs, there was no significant difference between spinach and leaf lettuce, about twice the amount was deposited on both species as on endive and 3times as on head lettuce. All summer vegetables showed differences in deposition. For lodine, the deposition on spinach was roughly 3times (6times) that on curly kale and 35times (100times) that on white cabbage in the 2 experiments. For caesium, the deposition to curly kale was highest, about twice that on spinach and 35times (80times) that on white cabbage. The deposition velocity could be estimated, in average it was about 8times higher for 131 I than for 134 Cs. The influence of the particle size on the deposition velocity was small in the considered size range. Washing could reduce the contamination by about 10% for 131 I and 45% for 134 Cs. (orig.)

  14. Impacts of vegetation change on groundwater recharge

    Bond, W. J.; Verburg, K.; Smith, C. J.

    2003-12-01

    Vegetation change is the accepted cause of increasing river salt concentrations and the salinisation of millions of hectares of farm land in Australia. Replacement of perennial native vegetation by annual crops and pastures following European settlement has altered the water balance causing increased groundwater recharge and mobilising the naturally saline groundwater. The Redesigning Agriculture for Australian Landscapes Program, of which the work described here is a part, was established to develop agricultural practices that are more attuned to the delicate water balance described above. Results of field measurements will be presented that contrast the water balance characteristics of native vegetation with those of conventional agricultural plants, and indicate the functional characteristics required of new agricultural practices to reduce recharge. New agricultural practices may comprise different management of current crops and pastures, or may involve introducing totally new species. In either case, long-term testing is required to examine their impact on recharge over a long enough climate record to encompass the natural variability of rainfall that is characteristic of most Australian farming regions. Field experimentation therefore needs to be complemented and extended by computer simulation. This requires a modelling approach that is more robust than conventional crop modelling because (a) it needs to be sensitive enough to predict small changes in the residual recharge term, (b) it needs to be able to simulate a variety of vegetation in different sequences, (c) it needs to be able to simulate continuously for several decades of input data, and (d) it therefore needs to be able to simulate the period between crops, which often has a critical impact on recharge. The APSIM simulation framework will be used to illustrate these issues and to explore the effect of different vegetation combinations on recharge.

  15. Vegetation Index and Phenology (VIP) Vegetation Indices Monthly Global 0.05Deg CMG V004

    National Aeronautics and Space Administration — The NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) Vegetation Index and Phenology (VIP) global datasets were created using...

  16. Investigation on the Patterns of Global Vegetation Change Using a Satellite-Sensed Vegetation Index

    Ainong Li

    2010-06-01

    Full Text Available The pattern of vegetation change in response to global change still remains a controversial issue. A Normalized Difference Vegetation Index (NDVI dataset compiled by the Global Inventory Modeling and Mapping Studies (GIMMS was used for analysis. For the period 1982–2006, GIMMS-NDVI analysis indicated that monthly NDVI changes show homogenous trends in middle and high latitude areas in the northern hemisphere and within, or near, the Tropic of Cancer and Capricorn; with obvious spatio-temporal heterogeneity on a global scale over the past two decades. The former areas featured increasing vegetation activity during growth seasons, and the latter areas experienced an even greater amplitude in places where precipitation is adequate. The discussion suggests that one should be cautious of using the NDVI time-series to analyze local vegetation dynamics because of its coarse resolution and uncertainties.

  17. Sensory determinants of stated liking for vegetable names and actual liking for canned vegetables

    Dinnella, Caterina; Morizet, David; Masi, Camilla

    2016-01-01

    tastes (sweet, umami), delicate flavour and bright appealing colour. A second group of highly disliked vegetables consists of cauliflowers and broccoli, characterized by disliked sensations such as bitter taste and objectionable flavour. Internal Preference Maps from actual liking scores indicate...

  18. Vegetable Grafting: The Implications of a Growing Agronomic Imperative for Vegetable Fruit Quality and Nutritive Value

    Marios C. Kyriacou

    2017-05-01

    Full Text Available Grafting has become an imperative for intensive vegetable production since chlorofluorocarbon-based soil fumigants were banned from use on grounds of environmental protection. Compelled by this development, research into rootstock–scion interaction has broadened the potential applications of grafting in the vegetable industry beyond aspects of soil phytopathology. Grafting has been increasingly tapped for cultivation under adverse environs posing abiotic and biotic stresses to vegetable crops, thus enabling expansion of commercial production onto otherwise under-exploited land. Vigorous rootstocks have been employed not only in the open field but also under protected cultivation where increase in productivity improves distribution of infrastructural and energy costs. Applications of grafting have expanded mainly in two families: the Cucurbitaceae and the Solanaceae, both of which comprise major vegetable crops. As the main drives behind the expansion of vegetable grafting have been the resistance to soilborne pathogens, tolerance to abiotic stresses and increase in yields, rootstock selection and breeding have accordingly conformed to the prevailing demand for improving productivity, arguably at the expense of fruit quality. It is, however, compelling to assess the qualitative implications of this growing agronomic practice for human nutrition. Problems of impaired vegetable fruit quality have not infrequently been associated with the practice of grafting. Accordingly, the aim of the current review is to reassess how the practice of grafting and the prevalence of particular types of commercial rootstocks influence vegetable fruit quality and, partly, storability. Physical, sensorial and bioactive aspects of quality are examined with respect to grafting for watermelon, melon, cucumber, tomato, eggplant, and pepper. The physiological mechanisms at play which mediate rootstock effects on scion performance are discussed in interpreting the

  19. Post-fire vegetation dynamics in Portugal

    Gouveia, C.; Dacamara, C. C.; Trigo, R. M.

    2009-04-01

    The number of fires and the extent of the burned surface in Mediterranean Europe have increased significantly during the last three decades. This may be due either to modifications in land-use (e.g. land abandonment and fuel accumulation) or to climatic changes (e.g. reduction of fuel humidity), both factors leading to an increase of fire risk and fire spread. As in the Mediterranean ecosystems, fires in Portugal have an intricate effect on vegetation regeneration due to the complexity of landscape structures as well as to the different responses of vegetation to the variety of fire regimes. A thorough evaluation of vegetation recovery after fire events becomes therefore crucial in land management. In the above mentioned context remote sensing plays an important role because of its ability to monitor and characterise post-fire vegetation dynamics. A number of fire recovery studies, based on remote sensing, have been conducted in regions characterised by Mediterranean climates and the use of NDVI to monitor plant regeneration after fire events was successfully tested (Díaz-Delgado et al., 1998). In particular, several studies have shown that rapid regeneration occurs within the first 2 years after the fire occurrences, with distinct recovery rates according to the geographical facing of the slopes (Pausas and Vallejo, 1999). In 2003 Portugal was hit by the most devastating sequence of large fires, responsible by a total burnt area of 450 000 ha (including 280 000 ha of forest), representing about 5% of the Portuguese mainland (Trigo et al., 2006). The aim of the present work is to assess and monitor the vegetation behaviour over Portugal following the 2003 fire episodes. For this purpose we have used the regional fields of the Normalized Difference Vegetation Index (NDVI) as obtained from the VEGETATION-SPOT5 instrument, from 1999 to 2008. We developed a methodology to identify large burnt scars in Portugal for the 2003 fire season. The vegetation dynamics was then

  20. Crucibulum laeve (Huds. Kambly in cerrado vegetation of São Paulo, Brazil

    Iuri Goulart Baseia

    2001-04-01

    Full Text Available A rare lignicolous gasteroid fungus of the tropics, Crucibulum laeve (Huds. Kambly is recorded for the first time from State of São Paulo and for de second time from Brazil, growing on decaying wood, occasionally on other plant debris, on soil under cerrado vegetation. Macro and microscopic features were described from fresh and dried basidiocarps using the traditional methods for Gasteromycetes. The substrate and the taxonomic characteristics agree closely with the literature consulted.Crucibulum laeve (Huds. Kambly, um raro gasteromicete lignícolo nos tropicos, é registrado pela primeira vez para o Estado de São Paulo e pela segunda vez para o Brasil, crescendo sobre madeira em decomposição e ocasionalmente sobre outros fragmentos de plantas em solo, sob vegetação de cerrado. É dada a descrição das características macro e microscópicas a partir de basidiocarpos frescos e secos, usando a metodologia tradicional para estudos de Gasteromycetes. O substrato e as características taxonômicas concordam com a literatura consultada.

  1. Riparian Vegetation Mapping Along the Hanford Reach

    FOGWELL, T.W.

    2003-07-11

    During the biological survey and inventory of the Hanford Site conducted in the mid-1990s (1995 and 1996), preliminary surveys of the riparian vegetation were conducted along the Hanford Reach. These preliminary data were reported to The Nature Conservancy (TNC), but were not included in any TNC reports to DOE or stakeholders. During the latter part of FY2001, PNNL contracted with SEE Botanical, the parties that performed the original surveys in the mid 1990s, to complete the data summaries and mapping associated with the earlier survey data. Those data sets were delivered to PNNL and the riparian mapping by vegetation type for the Hanford Reach is being digitized during the first quarter of FY2002. These mapping efforts provide the information necessary to create subsequent spatial data layers to describe the riparian zone according to plant functional types (trees, shrubs, grasses, sedges, forbs). Quantification of the riparian zone by vegetation types is important to a number of DOE'S priority issues including modeling contaminant transport and uptake in the near-riverine environment and the determination of ecological risk. This work included the identification of vegetative zones along the Reach by changes in dominant plant species covering the shoreline from just to the north of the 300 Area to China Bar near Vernita. Dominant and indicator species included Agropyron dasytachyudA. smithii, Apocynum cannabinum, Aristida longiseta, Artemisia campestris ssp. borealis var scouleriana, Artemisa dracunculus, Artemisia lindleyana, Artemisia tridentata, Bromus tectorum, Chrysothamnus nauseosus, Coreopsis atkinsoniana. Eleocharis palustris, Elymus cinereus, Equisetum hyemale, Eriogonum compositum, Juniperus trichocarpa, Phalaris arundinacea, Poa compressa. Salk exigua, Scirpus acutus, Solidago occidentalis, Sporobolus asper,and Sporobolus cryptandrus. This letter report documents the data received, the processing by PNNL staff, and additional data gathered in FY

  2. Vegetation (MCV / NVCS) Mapping Projects - California [ds515

    California Natural Resource Agency — This metadata layer shows the footprint of vegetation mapping projects completed in California that have used the Manual California of Vegetation ( MCV 1st edition)...

  3. Assessing the vegetation canopy influences on wind flow using wind ...

    Artificial plastic vegetations with different porosity and canopy shape were introduced as ... Wind erosion is the Aeolian process by which soil particles are detached from ..... the stabilizing role of vegetation on wind erosion. And therefore, for ...

  4. Prevalence of Parasitic Contamination of Salad Vegetables in Ilorin ...

    EBUBE AMAECHICHARLES

    Keywords: Parasitic, Salad vegetables, Contamination, Ilorin, Nigeria. 1. ... domestic animal origin as fertilizer, and the habit of eating vegetables raw or undercooked are ..... for cleaning the farm products before they are offered for sale.

  5. Genetically engineered plants with increased vegetative oil content

    Benning, Christoph

    2017-05-23

    The invention relates to genetically modified agricultural plants with increased oil content in vegetative tissues, as well as to expression systems, plant cells, seeds and vegetative tissues related thereto.

  6. Advances on Modelling Riparian Vegetation-Hydromorphology Interactions

    Solari, L.; Van Oorschot, M.; Belletti, B.; Hendriks, D.; Rinaldi, M.; Vargas-Luna, A.

    2016-01-01

    Riparian vegetation actively interacts with fluvial systems affecting river hydrodynamics, morphodynamics and groundwater. These interactions can be coupled because both vegetation and hydromorphology (i.e. the combined scientific study of hydrology and fluvial geomorphology) involve dynamic

  7. Vegetation - Anza-Borrego Desert State Park [ds165

    California Natural Resource Agency — The Anza Borrego Desert State Park (ABDSP) Vegetation Map depicts vegetation within the Park and its surrounding environment. The map was prepared by the Department...

  8. Terrestrial transect study on driving mechanism of vegetation changes

    2008-01-01

    In terms of Chinese climate-vegetation model based on the classification of plant functional types, to- gether with climatic data from 1951 to 1980 and two future climatic scenarios (SRES-A2 and SRES-B2) in China from the highest and the lowest emission scenarios of greenhouse gases, the distribution patterns of vegetation types and their changes along the Northeast China Transect (NECT) and the North-South Transect of Eastern China (NSTEC) were simulated in order to understand the driving mechanisms of vegetation changes under climatic change. The results indicated that the vegetation distribution patterns would change significantly under future climate, and the major factors driving the vegetation changes were water and heat. However, the responses of various vegetation types to the changes in water and heat factors were obviously different. The vegetation changes were more sensi- tive to heat factors than to water factors. Thus, in the future climate warming will significantly affect vegetation distribution patterns.

  9. Remote sensing application for delineating coastal vegetation - A case study

    Kunte, P.D.; Wagle, B.G.

    Remote sensing data has been used for mapping coastal vegetation along the Goa Coast, India. The study envisages the use of digital image processing techniques for delineating geomorphic features and associated vegetation, including mangrove, along...

  10. Effect of variety mixtures on cowpea (Vigna unguiculata) vegetable ...

    jokonya

    AN EVALUATION OF SIX COWPEA VARIETIES GROWN ... provide cheap sources of protein, micronutrients and mineral elements that can ... traditional vegetables is that, these leafy vegetables are present in most home ..... REFERENCES. 1.

  11. Vegetation damage and recovery after Chiginagak Volcano Crater drainage event

    Department of the Interior — From August 20 — 23, 2006, I revisited Chiginigak volcano to document vegetation recovery after the crater drainage event that severely damaged vegetation in May of...

  12. Metals in leafy vegetables grown in Addis Ababa and toxicological ...

    Metals in leafy vegetables grown in Addis Ababa and toxicological implications. ... the leafy vegetables is attributed to plant differences in tolerance to heavy metals. ... Treatment of industrial effluents and phyto-extraction of excess metals from ...

  13. Landscape level assessment of critically endangered vegetation of ...

    techniques. Littoral vegetation is the only natural vegetation type of Lakshadweep islands. Altogether ... is the best method to analyse patch size, shape ..... qualitative levels. .... 285, USDA Forest Service, Pacific North West Research. Station ...

  14. Assessing the accuracy of remote sensing techniques in vegetation ...

    Assessing the accuracy of remote sensing techniques in vegetation fractions estimation. ... This study aimed at exploring different remote sensing (RS) techniques for quantitatively measuring vegetation and bare soil ... HOW TO USE AJOL.

  15. Evaluation of land and vegetation degradation indicators in Kiang ...

    Evaluation of land and vegetation degradation indicators in Kiang'ombe ... land and vegetation degradation risk and analyzing the effectiveness of various ... The methods used included; Focus Group Discussions (FGD), key informant ...

  16. Biota - 2011 Vegetation Inventory - Mud Lake, MN/SD

    Army Corps of Engineers, Department of the Army, Department of Defense — 2011 Vegetation Classification for Mud Lake, MN/SD Vegetation Project Report, OMBIL Environmental Stewardship - Level 1 Inventory. Mud Lake, located on the Minnesota...

  17. Identification of Distribution Channels to Create Sustainable Vegetable Prices

    Aflit Nuryulia Praswati

    2017-12-01

    Full Text Available The price of vegetables has a role as a contributor to the rate of inflation. Currently the number of vegetable production in Boyolali region can no longer meet the needs of local communities. The limited amount of vegetable production and the inhibition of the vegetable distribution channel creates a scarcity of vegetables that result in price increases. This study aims to identify the distribution channel and the formation of vegetable prices derived from Boyolali area. The method used in this research is quantitative and qualitative. Respondents from this study consisted of farmers, wholesalers, small trader and end consumers. The type of distribution channel prevailing in Boyolali area are traditional and modern distribution channels. Intermediate distribution channels play a greater role in determining vegetable prices. If farmers want to improve their economic condition, it needs innovation and creativity in the process of planting, harvesting, packaging and marketing vegetable products.

  18. Predicting gender differences in liking for vegetables and preference for a variety of vegetables among 11-year-old children.

    Lehto, Elviira; Ray, Carola; Haukkala, Ari; Yngve, Agneta; Thorsdottir, Inga; Roos, Eva

    2015-12-01

    We studied the factors that predict liking for vegetables and preference for a variety of vegetables among schoolchildren. Additionally, we examined if there were gender differences in the predictors that explain the hypothesized higher scores in liking vegetables and preferences among girls. The data from the PRO GREENS project included 424 Finnish children (response rate 77%) aged 11 to 12. The children completed validated measures about social and environmental factors related to their liking for vegetables and preferences both at baseline 2009 and follow-up 2010. The associations were examined with regression and mediation analyses. The strongest predictors of both girls' and boys' liking and preferences were higher levels of eating vegetables together with the family, previous vegetable intake and a lower level of perceived barriers. Liking was additionally predicted by a lower level of parental demand that their child should eat vegetables. Girls reported higher levels of liking and preferences in the follow-up. This gender difference was mainly explained by girls' lower level of perceived barriers related to vegetable intake and girls' higher previous vegetable intake. Interventions that aim to increase the low vegetable intake among boys by increasing their liking for vegetables and preference for a variety of vegetables could benefit from targeting perceived barriers, namely boys' perception and values concerning the consumption of vegetables. Copyright © 2015 Elsevier Ltd. All rights reserved.

  19. Miradas francesas sobre la Guerra Civil

    Jean-Marc DELAUNAY

    2015-03-01

    Full Text Available Como muestra el asunto hoy vigente —pero relativamente discreto— de la venta del edificio que abrigó el antiguo taller parisino donde Picasso hizo su Guernica (1937, la Guerra Civil española sigue siendo en Francia una referencia mayor de la historia contempóranea. Al ritmo de las conmemoraciones decenales de su estallido (1996/2006, se ha desarrollado una verdadera marea memorial nutrida tanto por la apertura de archivos escritos y audiovisuales como por la desinhibición de los nietos de exiliados condicionados durante tanto tiempo por la historia de la derrota de sus padres y abuelos. Animan el debate las tribulaciones de la vida política española actual, entre neofranquismo, republicanismo y nacionalismos centralistas y/o regionales. Por haber sido la unica vía de salida, Francia —metropolis y África del norte— se vio más involucrada que cualquier otro país al recibir la aplastante mayoría de los exiliados. Aunque los verdaderos especialistas en dicha guerra son poco numerosos, todo un mundillo se ha otorgado el derecho y la capacidad de escribir sobre ella como descendientes de exiliados o activistas políticos, sobre todo en el sur de Francia. Todos los medios se ven afectados: desde la literatura estrictamente histórica al internet. De las obras eruditas, de vulgarización —también para la juventud— a las memorias arrancadas al olvido; de las actas de los coloquios a los tebeos; de los álbumes fotográficos a los documentales (siempre pro republicanos. Al tiempo toda la producción histórica generalista o militar junta a los partidarios de una visión anticomunista, neutralista o manifestamente pro franquista. La Guerra Civil española, que había encontrado una Francia dividida, la reencuentra de nuevo como tal a pesar de todos los intentos de mediación científica.

  20. Reflexiones sobre la crisis. Vidas y Memorias

    Estela Vázquez

    2009-11-01

    Full Text Available El artículo se plantea analizar la deslegitimación de la política y de los políticos, así como del acto de votar. Encuadrado en el marco del contexto de la crisis argentina de los últimos años, quiere responder, por medio de la entrevista oral y la historia de vida, a cómo se ve desde la ciudadanía el ejercicio de la democracia, las prácticas políticas, la alternancia en el poder y de qué forma todo esto influye en las vidas personales de los entrevistados. Asimismo, se entrelaza el análisis del espectáculo político con el público que ofrecen los medios de comunicación y de entretenimiento, con lo que se viene a concluir que es cada vez más difícil distinguir en el debate social la ficción de los hechos y personajes verdaderamente reales. Para este trabajo se analizan tres trayectorias laborales de ex-empleados de la administración pública, y sus apreciaciones sobre el despido, vinculando estas experiencias de vida a la formación de sus ideas sobre la política y los políticos.. Sus lugares de trabajo eran el Registro Civil, la Secretaría de Educación y la Legislatura, respectivamente.__________________ABSTRACT:This article tries to analyse the discredit of politics and politicians along with the act of voting. Placed in the context of the Argentine crisis, it wants to determinate through oral interview and life story how citizens see the exercise of democracy, the political practices and the power switching, to establish how they have influenced in the lifes of the persons being interviewed. At the same time, it interlaces an analysis of he political spectacle shown to the public by the media, to conclude that is becoming more a more difficult to distinguish the fiction from the real characters in the social debate.

  1. El puente Bendorf sobre el Rin (Alemania

    Hirschfeld, Kurt

    1966-03-01

    Full Text Available This recently completed bridge over the Rhine is 524 m long, and is a reinforced concrete structure, built by successive overhangs, without the aid of formwork or scaffolding. The centre span is 208 m in length, and the other six vary between 43 and 71 m. The deck consists of two independent parts, including a continuous box girder, with a hinge at the crown of the main span. It is stiffened with transversal diaphragms, spaced every 34 m. The piles rest on pneumatic caissons, which go down to 16 m below the river bed. The attachment between the piles and the caissons is rigid, at the central pile, and at the other piles it operates through a roller bearing. The central span was constructed without intermediate supports for the first 40 m, and beyond that stage, for greater safety, a provisional movable tower was built, as a temporary point of support for the free overhang. The various sections were concreted and post-tensioned with 32 mm bars, by the Dywidag procedure. Account was taken of the varying deformations that took place at each section, so as to add the necessary counter-deflection that finally enabled the two sides of the arch to meet at the crown at the calculated point.Este puente, recientemente construido, sobre el Rin, tiene una longitud total de 524 m, es de hormigón armado y se ha realizado por el procedimiento de voladizos sucesivos, sin entramado auxiliar ni cimbras. La luz del tramo central es de 208 m, y las de los otros seis oscilan entre 43 y 71 m. La estructura del tablero se compone de dos partes independientes, formadas por una viga tipo cajón, continua, con una articulación en la clave del tramo central y rigidizada con diafragmas transversales espaciados a 34 m. Las pilas centrales se apoyan sobre cajones neumáticos que descienden 16 m debajo del fondo del río. La unión entre estas pilas y la estructura cajón es rígida, y de tipo rodillo en las otras pilas. El tramo central se ha construido por voladizos

  2. How Much Do Americans Pay for Fruits and Vegetables?

    Reed, Jane; Frazao, Elizabeth; Itskowitz, Rachel

    2004-01-01

    Many Americans do not consume the recommended amount of fruits and vegetables. Almost half of Americans think eating more fruits and vegetables would make their diets healthier, so why don't they? One argument is that fruits and vegetables are expensive, especially when purchased fresh. According to an ERS study, a consumer can meet the recommendation of three servings of fruits and four servings of vegetables daily for 64 cents.

  3. Determinants of fruit and vegetable consumption among children and adolescents

    Rasmussen, Mette; Krølner, Rikke; Klepp, Knut-Inge

    2006-01-01

    In order to more effectively promote fruit and vegetable intake among children and adolescents, insight into determinants of intake is necessary. We conducted a review of the literature for potential determinants of fruit and vegetable intake in children and adolescents.......In order to more effectively promote fruit and vegetable intake among children and adolescents, insight into determinants of intake is necessary. We conducted a review of the literature for potential determinants of fruit and vegetable intake in children and adolescents....

  4. Price Trends Are Similar for Fruits, Vegetables, and Snack Foods

    Kuchler, Fred; Stewart, Hayden

    2008-01-01

    An increase in the price of fruits and vegetables relative to less healthy foods could reduce consumers’ incentives to purchase fruits and vegetables and result in less healthy diets. Whether such a change in relative prices and incentives has occurred in the United States is difficult to prove because of substantial quality improvements in many fresh fruits and vegetables. For commonly consumed fresh fruits and vegetables for which quality has remained fairly constant, analysis of price tren...

  5. REPRESENTAÇÃO SOCIAL DOS ENFERMEIROS SOBRE CUIDADOS PALIATIVOS

    Coelho de Britto, Sabrina Maria; de Souza Ramos, Raquel; dos Santos, Érick Igor; da Silva Veloso, Olga; Melo da Silva, Aline; de Aguiar Mariz, Rosângela Guiomar

    2015-01-01

    Introdução: O presente estudo refere-se a um processo de investigação sobre a representação social dos enfermeiros sobre cuidados paliativos. Objetivos: identificar a estrutura das representações sociais dos enfermeiros sobre cuidados paliativos; discutir as repercussões dessas representações no cotidiano da prática assistencial. Materiais e Métodos: Para a realização deste estudo foram abordados 70 enfermeiros que atuam nas enfermarias do serviço de Clínica Médica. A técnica para coleta de d...

  6. Pistas para pensar las significaciones imaginarias sobre la invariancia

    Bilyk, Pablo Andrés

    2011-01-01

    Este escrito propone un primer esbozo de nominalizaciones sobre las significaciones imaginarias en torno a la idea de invariancia, con el fin de comenzar a mapear categorías para transitar que nos permitan pensar las construcciones fantasmáticas sobre el no-cambio. En definitiva, se trata de avanzar sobre la problematización de los modos de funcionamiento, constitución y reconfiguraciones de las hegemonías en los entramados sociales contemporáneos. Facultad de Periodismo y Comunicación Soc...

  7. NEW GREENHOUSE TECHNOLOGIES FOR VEGETABLE PRODUCTION

    S. M. Sirota

    2016-01-01

    Full Text Available First decade of XXI century is characterized by significant augmentation in vegetable world’s production. Average annual vegetable production has been 346 million tons, and it has exceeded the average annual potato production (318 million tons. It has occurred due to the use of up-to-date technologies for vegetable production and, particularly, in greenhouses. In Russian Federation, the total production of vegetables was 5 275.6 thousand tons in 2015 that was 13.3% more than in 2014. But the total vegetable production in greenhouses was only 722.8 thousand tons, that was 0.7% less than in 2014 (728.1 thousand tons. It can be explained that the old technologies have been used for many greenhouses around Russia. Up-to-date technologies for greenhouses are described in the article. Small-volume hydroponics. Plants are grown in mineral wadding, packed up in the special chutes. Mineral nutrition and water are supplied through special pipe with many branch pipes toward each plant. Advantage: pH and nutrition are maintained, consumption of water and mineral nutrition are optimized, and that improves plants grow control. Expenditures of labor decreased, quality of fruit became better and the yield increased significantly by 45-50 kg/m2 comparing with growing on the soil (25-30 kg/m2. Hydroponics with flowing water (salad production lines. Conveyor for salad and vegetable growing on horizontal moving chutes with flowing water and nutrition was developed. Advantage: high level of automation and mechanization of all processes of growing increased the effectiveness of the use of greenhouse areas (we can place 30% plants more at the same area. Seedling production lines. Production lines for seedlings enable to grow vegetables and leafy vegetables on stationary benches, being furnished with periodical nutrition and water supply at times. Advantage: 700 seedlings additionally on each m2 a year. Future technologies are

  8. Water dynamics of vegetable using radiation

    Nakanishi, Tomoko

    2000-01-01

    Neutral ray is specifically adsorbed and scattered by hydrogen, which is construction element of water. We applied nondestructive visualization of water dynamics in vegetable using neutral ray. The neutron ray was produced by JRR-3M of JAERI. Water dynamics of epigeal part of vegetable, tree, seed, root and soil near root were observed. The distribution and behavior of water were seen by image. For examples, the dry process of cedar, water adsorption process of seed of broad beam, corn, morning glory, rice and wheat. The growing process of root in the soil was analyzed by CT images that constructed three-dimensional image. Water image of root-soil system made clear water dynamics of the optional site near root. The distribution of water in the cut carnation was observed before and after dry treatment. The change of distribution of water was observed. (S.Y.)

  9. Mathematical Modeling of Vegetable-Oil Crystallization

    Hjorth, Jeppe Lindegaard

    be desirable to enhance specific properties such as shelf life, viscosity, texture, sensory aspects and physical appearance. Vegetable oils and fats constitute a considerable part of many food products such as chocolate, margarine, bread, spreads and ice cream. Several attractive properties found......In recent years the food sector has experienced a great boost in demand for tailor-made fats and oils to produce so-called functional foods, where ingredients have been carefully modified to yield products with specific, valuable properties. Depending on market segment and product, it may...... in these products, including flavor release, melting profile and appearance, are governed by the oils and fats added. Consequently, altering the fat phase may lead to enhanced properties of the products. The primary focus of the present work is vegetable oils and fats originating from different sources covering...

  10. Vegetation survey of PEN Branch wetlands

    1991-01-01

    A survey was conducted of vegetation along Pen Branch Creek at Savannah River Site (SRS) in support of K-Reactor restart. Plants were identified to species by overstory, understory, shrub, and groundcover strata. Abundance was also characterized and richness and diversity calculated. Based on woody species basal area, the Pen Branch delta was the most impacted, followed by the sections between the reactor and the delta. Species richness for shrub and groundcover strata were also lowest in the delta. No endangered plant species were found. Three upland pine areas were also sampled. In support of K Reactor restart, this report summarizes a study of the wetland vegetation along Pen Branch. Reactor effluent enters Indian Grove Branch and then flows into Pen Branch and the Pen Branch Delta.

  11. Radioactivity in Scottish soils and grassy vegetation

    Miller, G.R.; Horrill, A.D.; Thomson, A.J.; Howson, G.

    1989-05-01

    In June 1987, soil and graminoid vegetation samples were collected from 159 randomly selected Scottish sites and analysed for radioactivity due to potassium-40, caesium-134 and caesium-137. Activity due to plutonium-238 and plutonium-239/240 was also measured in soils from 47 of the sites. The main aims of this survey were to determine: (a) the geographic distribution of radiocaesium activity due to fallout from the Chernobyl reactor disaster, (b) the pattern of radiation due to the naturally occurring isotope potassium-40, (c) the activity attributable to caesium-137 fallout from nuclear weapons testing prior to the Chernobyl deposition, (d) the uptake of caesium-137 by vegetation from different soil types. (author)

  12. Antimicrobial Effect of Extracts of Cruciferous Vegetables

    Shu-Hui Hu

    2004-12-01

    Full Text Available The cruciferous vegetables cauliflower, broccoli, cabbage, Chinese radish, Chinese kale, and Chinese kitam were used in this study to prepare water-soluble and methanol-water extracts. Crude protein extracts were also obtained by diethylaminoethyl (DEAE anion exchange chromatography. Water-soluble polysaccharides were prepared by ethanol precipitation followed by ultrafiltration. The antimicrobial effects of all these extracts were evaluated against Gram-positive bacteria, Gram-negative bacteria, and yeast. Crude protein extracts exhibited the greatest antimicrobial activity in monoculture experiments. The antimicrobial effects of cruciferous vegetables were also studied by steeping beef, carrot, and celery in chlorine (10 ppm or citric acid solution (1% containing the crude protein extract (500 ppm for different time periods. Total aerobic plate counts and coliform counts on these foods decreased significantly after 10 minutes in all steeping solutions (p < 0.05.

  13. Vegetation attached to the elephant trunk.

    Tanaka, Akiko; Sakamoto, Toshihito; Okada, Kenji; Okita, Yutaka

    2013-09-01

    The elephant trunk technique is used as a standard method in the approach to staged repair of extensive thoracic aneurysms. Here, we present a rare case of a graft infection, in which vegetation was attached to the distal end of the elephant trunk. A 36-year old male who had undergone total arch replacement with elephant trunk installation for type A aortic dissection was readmitted for high-grade fever. At the time of admission, Osler's nodules were present and brain magnetic resonance imaging showed multiple small emboli and haemorrhages. Transoesophageal echocardiography could not locate any sign of infection within the cardiac chambers, but disclosed vegetation attached to the elephant trunk. He underwent successful emergent graft replacement of the lesion, and no recurrence of the infection has been observed.

  14. Availability and consumption of fruits and vegetables in nine regions ...

    Bernt Lindtjorn

    children studied did not eat vegetable and fruit in the week preceding the survey, respectively. .... refer to households who never saw a single fruit/ vegetable, even once ..... did not eat vegetables even once, let alone three times in a week is.

  15. Parasitic contamination of leafy vegetables: a function of the leaf ...

    A survey was undertaken to determine the degree of contamination of some stable vegetables and their surrounding soils by parasites in Uyo, Nigeria. Out of the 780 leaves from six vegetables and 50 soil samples screened, 498 (63.9%) of vegetables and 36 (72%) of the soil samples were positive for parasite ova, larvae ...

  16. Nutritional potentials of some tropical vegetable leaf meals ...

    Three tropical vegetable species (Talium triangulare, Amaranthus cruentus and Telfairia occidentalis) were selected based on their availability and agronomic desirability. The freshly harvested vegetable leaves were subjected to 2 processing techniques (shredding and sundrying) before milling into the vegetable leaf ...

  17. Comparative study of trace element levels in some local vegetable ...

    The level of heavy metals in two varieties of vegetables harvested during the dry and wet seasons from seven different locations in Ilorin, Nigeria, were determined. The correlation between the level of metals in the vegetables and the irrigation water was also studied. Vegetables harvested during the dry season were found ...

  18. Field vegetable production in the Lake Zone of Tanzania

    Everaarts, A.P.; Putter, de H.; Maerere, A.P.; Amon, W.

    2014-01-01

    In November 2012 and in August 2014 surveys were carried out in field vegetable producing areas in the Lake Zone of Tanzania. The aim of the surveys was to learn the conditions for field vegetable production and marketing in these areas. Recommendations for the development of vegetable production

  19. Proximate analysis of some dry season vegetables in Anyigba, Kogi ...

    STORAGESEVER

    2008-05-16

    May 16, 2008 ... Key words: Sensory evaluation, dry season vegetable, available, Anyigba, Nigeria. INTRODUCTION. Dry season vegetables are shrubs or herbaceous annuals or biennial plants. In Nigeria, most of the com- monly eaten vegetables are the succulent leaves of plants; they are eaten as supplementary foods, ...

  20. Assessment of nutritional quality of cooked Swazi leafy vegetables ...

    Brassica oleracea and Spinacia oleracea were also analysed and compared with other vegetables. Sampled vegetables were divided into two categories. All vegetables in category one were cooked without any additives. In category two Hibiscus escolentus and Corchorius olitorus were cooked with bicarbonate of soda ...

  1. Conveyance estimation in channels with emergent bank vegetation ...

    Emergent vegetation along the banks of a river channel influences its conveyance considerably. The total channel discharge can be estimated as the sum of the discharges of the vegetated and clear channel zones calculated separately. The vegetated zone discharge is often negligible, but can be estimated using ...

  2. Taste intensities of ten vegetables commonly consumed in the Netherlands

    Stokkom, van V.L.; Teo, P.S.; Mars, M.; Graaf, de Kees; Kooten, van O.; Stieger, M.

    2016-01-01

    Bitterness has been suggested to be the main reason for the limited palatability of several vegetables. Vegetable acceptance has been associated with preparation method. However, the taste intensity of a variety of vegetables prepared by different methods has not been studied yet. The objective

  3. Preliminary study on sterilization effect of irradiation on dry vegetable

    Zhai Jianqing; Bao Jianzhong; Cao Hong; Wang Jinrong; Chen Xiulan

    2004-01-01

    The number of surviving germs relationship to irradiation dose for several species dry vegetable was studied, and the original value D 10 of the dry vegetable was given. The value will provide a theoretical reference to ascertain the appropriate irradiation dose in the irradiation process of the dry vegetable

  4. Integrating Vegetation Classification, Mapping, and Strategic Inventory for Forest Management

    C. K. Brewer; R. Bush; D. Berglund; J. A. Barber; S. R. Brown

    2006-01-01

    Many of the analyses needed to address multiple resource issues are focused on vegetation pattern and process relationships and most rely on the data models produced from vegetation classification, mapping, and/or inventory. The Northern Region Vegetation Mapping Project (R1-VMP) data models are based on these three integrally related, yet separate processes. This...

  5. Spatial relationship between climatologies and changes in global vegetation activity

    Jong, de R.; Schaepman, M.E.; Furrer, R.; Bruin, de S.; Verburg, P.H.

    2013-01-01

    Vegetation forms a main component of the terrestrial biosphere and plays a crucial role in land-cover and climate-related studies. Activity of vegetation systems is commonly quantified using remotely sensed vegetation indices (VI). Extensive reports on temporal trends over the past decades in time

  6. Vegetation Change in Blue Oak Woodlands in California

    Barbara A. Holzman; Barbara H. Allen-Diaz

    1991-01-01

    A preliminary report of a statewide project investigating vegetation change in blue oak (Quercus douglasii) woodlands in California is presented. Vegetation plots taken in the 1930s, as part of a statewide vegetation mapping project, were relocated and surveyed. Species composition, cover and tree stand structure data from the earlier study were...

  7. Phytochemical profile of some green leafy vegetables in South East ...

    The potential of eight common green leafy vegetables (GLV) in the raw and cooked forms as natural source of phytochemicals was assessed. The vegetables studied were the common ones found in southeast Nigeria and they included Ugu, Nchanwu, Okazi, Utazi, Oha, Nturukpa, Ahihara, and Onugbo. The vegetables ...

  8. Understanding and changing children’s sensory acceptance for vegetables

    Poelman, A.A.M.

    2016-01-01

    Vegetable intake of children is well below recommendations in Australia and in most other western countries. Vegetables are the food category least liked by children. As acceptance is a key driver of intake, strategies are needed to increase children’s acceptance of vegetables. The present thesis

  9. Discharge/Stage Relations in Vegetated Danish Streams

    Larsen, Torben; Frier, Jens-Ole; Vestergaard, Kristian

    1990-01-01

    This paper describes how the friction in danish streams varies as function of the vegetation. The major species of vegetation are represented. A series of laboratory and field experiments are described, and a hypothesis for the influence of the vegetation on the Manning's n is discussed....

  10. Analysis of Post-Fire Vegetation Recovery in the Mediterranean Basin using MODIS Derived Vegetation Indices

    Hawtree, Daniel; San Miguel, Jesus; Sedano, Fernando; Kempeneers, Pieter

    2010-05-01

    The Mediterranean basin region is highly susceptible to wildfire, with approximately 60,000 individual fires and half a million ha of natural vegetation burnt per year. Of particular concern in this region is the impact of repeated wildfires on the ability of natural lands to return to a pre-fire state, and of the possibility of desertification of semi-arid areas. Given these concerns, understanding the temporal patterns of vegetation recovery is important for the management of environmental resources in the region. A valuable tool for evaluating these recovery patterns are vegetation indices derived from remote sensing data. Previous research on post-fire vegetation recovery conducted in this region has found significant variability in recovery times across different study sites. It is unclear what the primary variables are affecting the differences in the rates of recovery, and if any geographic patterns of behavior exist across the Mediterranean basin. This research has primarily been conducted using indices derived from Landsat imagery. However, no extensive analysis of vegetation regeneration for large regions has been published, and assessment of vegetation recovery on the basis of medium-spatial resolution imagery such as that of MODIS has not yet been analyzed. This study examines the temporal pattern of vegetation recovery in a number of fire sites in the Mediterranean basin, using data derived from MODIS 16 -day composite vegetation indices. The intent is to develop a more complete picture of the temporal sequence of vegetation recovery, and to evaluate what additional factors impact variations in the recovery sequence. In addition, this study evaluates the utility of using MODIS derived vegetation indices for regeneration studies, and compares the findings to earlier studies which rely on Landsat data. Wildfires occurring between the years 2000 and 2004 were considered as potential study sites for this research. Using the EFFIS dataset, all wildfires

  11. Monitoring leafy vegetables through packaging films with

    Diezma Iglesias, Belen; Lara, M.A.; Molina, Marta; Lleó García, Lourdes; Ruiz-Altisent, Margarita; Artés Hernández, Francisco; Roger, Jean-Michel

    2012-01-01

    Fresh-cut or minimally processed fruit and vegetables have been physically modified from its original form (by peeling, trimming, washing and cutting) to obtain a 100% edible product that is subsequently packaged (usually under modified atmosphere packaging –MAP) and kept in refrigerated storage. In fresh-cut products, physiological activity and microbiological spoilage, determine their deterioration and shelf-life. The major preservation techniques applied to delay spoilage are chilling s...

  12. How to deal with radiologically contaminated vegetation

    Wilde, E.W.; Murphy, C.E.; Lamar, R.T.; Larson, M.J.

    1996-01-01

    This report describes the findings from a literature review conducted as part of a Department of Energy, Office of Technology Development Biomass Remediation Task. The principal objective of this project is to develop a process or group of processes to treat radiologically contaminated vegetation in a manner that minimizes handling, processing, and treatment costs. Contaminated, woody vegetation growing on waste sites at SRS poses a problem to waste site closure technologies that are being considered for these sites. It is feared that large sections of woody vegetation (logs) can not be buried in waste sites where isolation of waste is accomplished by capping the site. Logs or large piles of woody debris have the potential of decaying and leaving voids under the cap. This could lead to cap failure and entrance of water into the waste. Large solid objects could also interfere with treatments like in situ mixing of soil with grout or other materials to encapsulate the contaminated sediments and soils in the waste sites. Optimal disposal of the wood includes considerations of volume reduction, treatment of the radioactive residue resulting from volume reduction, or confinement without volume reduction. Volume reduction consists primarily of removing the carbon, oxygen, and hydrogen in the wood, leaving an ash that would contain most of the contamination. The only contaminant that would be released by volume reduction would by small amounts of the radioactive isotope of hydrogen, tritium. The following sections will describe the waste sites at SRS which contain contaminated vegetation and are potential candidates for the technology developed under this proposal. The description will provide a context for the magnitude of the problem and the logistics of the alternative solutions that are evaluated later in the review. 76 refs

  13. Quantitative indicators of fruit and vegetable consumption

    Dagmar Kozelová; Dana Országhová; Milan Fiľa; Zuzana Čmiková

    2015-01-01

    The quantitative research of the market is often based on surveys and questionnaires which are finding out the behavior of customers in observed areas. Before purchasing process consumers consider where they will buy fruit and vegetables, what kind to choose and in what quantity of goods. Consumers' behavior is affected by the factors as: regional gastronomic traditions, price, product appearance, aroma, place of buying, own experience and knowledge, taste preferences as well as specific heal...

  14. Extrusion Cooking Systems and Textured Vegetable Proteins

    2015-02-01

    Full Text Available Many fabricated foods are cooked industrially and are given desired textures, shapes, density and rehydration characteristics by an extrusion cooking process. This relatively new process is used in the preparation of “engineered” convenience foods: textured vegetable proteins, breakfast cereals, snacks, infant foods, dry soup mixes, breading, poultry stuffing, croutons, pasta products, beverage powders, hot breakfast gruels, and in the gelatinization of starch or the starchy component of foods.

  15. Quality determinants of fruit and vegetables productions

    Bruno Mezzetti; Cherubino Leonardi

    2009-01-01

    Nowadays, the main goal for modern horticultural production is the increase of quality. Furthermore, in consideration of the new consumer demand, always more attracted by a diet based on a larger consumption of fruit and vegetables without risks of pesticides residues and with increased nutritional value, new important features in addition to the traditional quality attributes are now requested. For a program of qualification and valorisation of modern horticultural productions, it is fundame...

  16. Rapid Vegetative Propagation Method for Carob

    Hamide GUBBUK; Esma GUNES; Tomas AYALA-SILVA; Sezai ERCISLI

    2011-01-01

    Most of fruit species are propagated by vegetative methods such as budding, grafting, cutting, suckering, layering etc. to avoid heterozygocity. Carob trees (Ceratonia siliqua L.) are of highly economical value and are among the most difficult to propagate fruit species. In the study, air-layering propagation method was investigated first time to compare wild and cultivated (�Sisam�) carob types. In the experiment, one year old carob limbs were air-layered on coco peat medium by wrapping with...

  17. High pressure effects on fruits and vegetables

    Timmermans, R.A.H.; Matser, A.M.

    2016-01-01

    The chapter provides an overview on different high pressure based treatments (high pressure pasteurization, blanching, pressure-assisted thermal processing, pressure-shift freezing and thawing) available for the preservation of fruits and vegetable products and extending their shelf life. Pressure treatment can be used for product modification through pressure gelatinization of starch and pressure denaturation of proteins. Key pressure–thermal treatment effects on vitamin, enzymes, flavor, co...

  18. How to deal with radiologically contaminated vegetation

    Wilde, E.W.; Murphy, C.E.; Lamar, R.T.; Larson, M.J.

    1996-12-31

    This report describes the findings from a literature review conducted as part of a Department of Energy, Office of Technology Development Biomass Remediation Task. The principal objective of this project is to develop a process or group of processes to treat radiologically contaminated vegetation in a manner that minimizes handling, processing, and treatment costs. Contaminated, woody vegetation growing on waste sites at SRS poses a problem to waste site closure technologies that are being considered for these sites. It is feared that large sections of woody vegetation (logs) can not be buried in waste sites where isolation of waste is accomplished by capping the site. Logs or large piles of woody debris have the potential of decaying and leaving voids under the cap. This could lead to cap failure and entrance of water into the waste. Large solid objects could also interfere with treatments like in situ mixing of soil with grout or other materials to encapsulate the contaminated sediments and soils in the waste sites. Optimal disposal of the wood includes considerations of volume reduction, treatment of the radioactive residue resulting from volume reduction, or confinement without volume reduction. Volume reduction consists primarily of removing the carbon, oxygen, and hydrogen in the wood, leaving an ash that would contain most of the contamination. The only contaminant that would be released by volume reduction would by small amounts of the radioactive isotope of hydrogen, tritium. The following sections will describe the waste sites at SRS which contain contaminated vegetation and are potential candidates for the technology developed under this proposal. The description will provide a context for the magnitude of the problem and the logistics of the alternative solutions that are evaluated later in the review. 76 refs.

  19. Substitution or addition? How overweight and obese adults incorporate vegetables into their diet during a randomized controlled vegetable feeding trial

    Objective: When attempting to eat healthier, individuals may add vegetables to their diet (addition) without changing other eating behaviors. Alternatively, individuals adding vegetables may decrease consumption of other foods (substitution). Distinguishing between the two means of incorporation of ...

  20. Estudio sobre encofrados de madera modernos

    de la Peña Aznar, Juan M.

    1980-11-01

    Full Text Available The author continues the development of the subject «Modern Timber Formwork», by summing up the comparative examination —already carried out in Part III of this Study— of the different types of glued timber existing on the market. In addition, the loads and stresses allowable for coniferous timber and the proposal for establishing Regulations for the Timber Section of the Research and Experimental Forestry Institute of Spain are given. In part V of the author's Study, published in this article, the important subject of the glues used for joining timber, a truly vital point in order to obtain louvered timber beams which are simply glued together, is approached.

    El autor continúa el desarrollo del tema sobre «Encofrados de madera modernos», resumiendo el estudio comparativo —ya hecho en la Parte III de este Estudio— de las diferentes vigas de madera encolada existentes en el mercado dando, además, las cargas y tensiones admisibles para maderas coníferas y la propuesta de Reglamentación de la Sección de Maderas del Instituto Forestal de Investigaciones y Experiencias de España. En la parte V del Estudio del autor, publicada en este articulo, se aborda el importante tema de las colas empleadas para las uniones de madera, algo realmente vital para la obtención de vigas de madera en celosía simplemente encoladas.