184 research outputs found

    Associação de artropódes versus cactáceas nativas nos Estados da Paraíba e Pernambuco.

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    As cactáceas atualmente encontradas em áreas semi-áridas de todo mundo, são consideradas, em determinadas épocas do ano como única fonte de alimentos para os animais.Resumo 1608-1

    Nova ocorrência da Cochonilha-do-carmim em Opuntia spp. (Cactaceae) em Santa Catarina, Brasil.

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    O objetivo deste trabalho foi o levantamento dos inimigos naturais desta cochonilha que infesta Opuntia spp. no litoral de Santa Catarina

    Prospecção de Dactylopius (Hemiptera, Coccoidea) na Paraíba, Pernambuco e Ceará em Opuntia ficus-indica.

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    A palma gigante (Opuntiaficus-indica) é a cultivar mais plantada na região nordeste do Brasil, devido a seu alto grau de resistência à seca e elevadas temperaturas, sua adaptabilidade a solos poucos férteis, alta produtividade decorrente da eficiência no uso da água, possibilitando a sobrevivênciade bovinos, caprinos e ovinos, nos períodos de seca e estiagem prolongadas.Resumo 1627-

    Microalgae production in fresh market wastewater and its utilization as a protein substitute in formulated fish feed for oreochromis spp.

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    Rapid growing of human population has led to increasing demand of aquaculture production. Oreochromis niloticus or known as tilapia is one of the most globally cultured freshwater fish due to its great adaptation towards extreme environment. Besides, farming of tilapia not only involves small scales farming for local consumption but also larger scales for international market which contributes to a foreign currency earning. Extensive use of fishmeal as feed for fish and for other animals indirectly caused an increasing depletion of the natural resource and may consequently cause economic and environmental unstable. Microalgae biomass seems to be a promising feedstock in aquaculture industry. It can be used for many purposes such as live food for fish larvae and dried microalgae to substitute protein material in fish feed. The microalgae replacement in fish feed formulation as protein alternative seem potentially beneficial for long term aqua-business sustainability. The present chapter discussed the potential of microalgae as an alternative nutrition in fish feed formulations, specifically Tilapia

    Communicable Diseases Prioritized for Surveillance and Epidemiological Research: Results of a Standardized Prioritization Procedure in Germany, 2011

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    To establish strategic priorities for the German national public health institute (RKI) and guide the institute's mid-term strategic decisions, we prioritized infectious pathogens in accordance with their importance for national surveillance and epidemiological research.We used the Delphi process with internal (RKI) and external experts and a metric-consensus approach to score pathogens according to ten three-tiered criteria. Additional experts were invited to weight each criterion, leading to the calculation of a median weight by which each score was multiplied. We ranked the pathogens according to the total weighted score and divided them into four priority groups.., Respiratory syncytial virus or Hantavirus) indicate a possible under-recognised importance within the current German public health framework. A process to strengthen respective surveillance systems and research has been started. The prioritization methodology has worked well; its modular structure makes it potentially useful for other settings

    Regioisomeric and substituent effects upon the outcome of the reaction of 1-borodienes with nitrosoarene compounds

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    A study of the reactivity of 1-borodienes with nitrosoarene compounds has been carried out showing an outcome that differs according to the hybridization state of the boron moiety. Using an sp2 boron substituent, a one-pot hetero-Diels–Alder/ring contraction cascade occurred to afford N-arylpyrroles with low to good yields depending on the electronic properties of the substituents on the borodiene, whereas an sp3 boron substituent led to the formation of stable boro-oxazines with high regioselectivity in most of the cases, in moderate to good yields. 1H and 11B NMR studies on two boro-oxazine regioisomers showed that selective deprotection can be performed. Formation of either the pyrrole or the furan derivative is pH- and regioisomer-structure-dependent. The results obtained, together with previous B3LYP calculations, support mechanistic proposals which suggest that pyrrole, or furan, formation proceeds via oxazine formation, followed by a boryl rearrangement and an intramolecular addition–elimination sequence
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