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Sample records for canare

  1. Canaric acid (3,4-seco-lupane derivative) isolated from propolis of Ceara, BR; Acido canarico (3,4-seco derivado do lupano) em propolis do Ceara

    Energy Technology Data Exchange (ETDEWEB)

    Albuquerque, Irineu L. de; Alves, Leonardo A.; Lemos, Telma L.G.; Monte, Francisco J.Q. [Universidade Federal do Ceara (UFC), Fortaleza, CE (Brazil). Dept. de Quimica Organica e Inorganica]. E-mail: tlemos@dqoi.ufc.br; Braz-Filho, Raimundo [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil). Centro de Ciencias e Tecnologia. Setor de Produtos Naturais

    2007-07-15

    Phytochemical investigation of a propolis sample from Alto Santo - Ceara, Brazil, allowed identification of triterpenes (lupeol, lupenone, germanicone, Canaric acid) and flavonoids (quercetin, kaempferol and acacetin), which were identified by spectroscopic data (IR, MS, and NMR, including 2D techniques). This is the first report of Canaric acid in propolis. Propolis extract and flavonoids showed antioxidant activity using a DPPH radical scavenging assay. (author)

  2. Triterpenes from the resin of Boswellia neglecta

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    Aman Dekebo

    2002-06-01

    Full Text Available The resin of Boswellia neglecta yielded four triterpenes canaric acid, α-amyrin, α-amyrone and epi-α-amyrin. Canaric acid and epi-α-amyrin are isolated here for the first time from the family Burseraceae. The compounds were identified using 1D and 2D NMR techniques.

  3. Triterpenes from the resin of Boswellia neglecta

    OpenAIRE

    Aman Dekebo; Ermias Dagne; Gautun, Odd R.; Arne J. Aasen

    2002-01-01

    The resin of Boswellia neglecta yielded four triterpenes canaric acid, α-amyrin, α-amyrone and epi-α-amyrin. Canaric acid and epi-α-amyrin are isolated here for the first time from the family Burseraceae. The compounds were identified using 1D and 2D NMR techniques.

  4. Triterpenes from the resin of Boswellia neglecta | Dekebo | Bulletin ...

    African Journals Online (AJOL)

    2002-03-13

    The resin of Boswellia neglecta yielded four triterpenes canaric acid, a -amyrin, a -amyrone and epi-a -amyrin. Canaric acid and epi-a -amyrin are isolated here for the first time from the family Burseraceae. The compounds were identified using 1D and 2D NMR techniques. (Received March 13, 2002; revised May 17, 2002)

  5. PERKINELMER ELM

    Science.gov (United States)

    The PerkinElmer Elm (formerly the AirBase CanarIT) is a multi-sensor air quality monitoring device that measures particulate matter (PM), total volatile organic compounds (VOCs), nitrogen dioxide (NO2), and several other atmospheric components. PM, VOCs, and NO2

  6. A Semi-supervised Heat Kernel Pagerank MBO Algorithm for Data Classification

    Science.gov (United States)

    2016-07-01

    images, one might consider comparing neighborhoods around pixels x and y using the L2 or L1 norm. Of course, techniques like rotation invariance can...are positive semi- definite . 3) L, Ls and Lw have non-negative, real-valued eigenvalues 0 =λ1≤λ2≤ ...≤λn. 4) λ is an eigenvalue of Lw with eigenvector...arriving at each node. An equivalent definition of the pagerank is: prα,f = ∞∑ k=0 α(1−α)kfP k. (2.6) Comparing the two different pageranks defined by (2.6

  7. A survey of the Rubus species (Rosaceae described from the Canary Islands

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    Matzke-Hajek, Günter

    1999-06-01

    Full Text Available Taxonomy, nomenclatura and distribution of the bramble species (Rubus L., subgen. Rubus described from the Canary Islands are studied. Apart from the widespread Mediterranean R. ulmifolius Schott two species occur: R. bollei Focke (Syn.: R. canariensis Focke, R. suspiciosus Menezes and R. palmensis A. Hansen. The latter is not an endemic of La Palma as assumed by its discoverer, but is recorded for the first time also in Gran Canaria and Tenerife. Complete descriptions are provided, and illustrations of distinctive features often lacking in herbarium specimens are presented. Problems concerning the typification are discussed. Rubus x wolfredoi-wildpretii H. E. Weber nothospec. nov., the frequent hybrid between Rubus bollei and R. ulmifolius is described as new to science. Rubus bornmuelleri Focke from Gran Canaria is based on a specimen dubium and has to be deleted from the list of Canarían species.Se han estudiado la taxonomía, la nomenclatura y la distribución de las especies de zarzas (Rubus L., subgen. Rubus descritas de las Islas Canarias. Junto a Rubus ulmifolius Schott, especie muy frecuente en el Mediterráneo, se encontraron dos especies: R. bollei Focke (Syn.: R. canariensis Focke, R. suspiciosus Menezes y R. palmensis A. Hansen. Se incluyen descripciones completas e ilustraciones de algunas características relevantes y que no siempre se han observado en especímenes de herbario revisados. Además, se discuten problemas de tipificación y se describe como nuevo para la ciencia Rubus x wolfredoi-wildpretii H.E. Weber nothospec. nov., híbrido frecuente entre R. bollei y R. ulmifolius. R. bornmuelleri Focke de Gran Canaria debe ser excluido de la lista de las especies canarias, al estar basada su descripción en un specimen dubium.

  8. Ecuador: efectos de la emigración en los resultados educativos

    Directory of Open Access Journals (Sweden)

    Mónica Mancheno Karolys

    2010-11-01

    escolaridad debido al alto costo de oportunidad que representa no viajar a una nación en donde, el emigrante aún de poseer bajos niveles educativos recibe ingresos superiores a los que en iguales circunstancias recibiría en el país de origen.  Adicionalmente a lo expuesto, es conveniente señalar que el sistema educativo ecuatoriano y su baja inversión han determinado bajos  incentivos a continuar los estudios.Palabras Claves: Familia transnacional, Flujos Migratorios, Remesas, Tasa Deserción escolar, Tasa no promoción escolar, Valor Agregado Bruto no petrolero___________________________ABSTRACT:Ecuador, like many Latin American countries, has high outward migration flows, which have determined changes in the economic performance of regions. In recent years, the country has migratory behavior of changing migratory characteristics, ranging from the gender composition, which is now more equitable, to changes in the regions of origin and destination of migrants. Thus, in the last decade the largest migration flows come from the high-productive provinces of Pichincha and Guayas, and the main destination is Spain. While the main benefit that generates phenomena of this nature is the remittance to the mother countries, its effect has not exceeded the purely economic level. In Ecuador it has achieved better results in the balance of payments, and also an increase in the consumerist levels of people, but it has also meant greater reliance of the regions from this type of income, which has stuck the autochthon productive development of the region. Additionally, the effects of variables of great importance for the socioeconomic development of nations, such as education, have not been more encouraging. The province of Canar is one of the Ecuadorian provinces to have the higher immigration history apart the highest rate of migrants over the total population, and the flow of remittances they generate represents about 70% of non-oil gross value added. But these features have not