Derivative Tree
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Alternative energy sources: a study on environmental awareness, social and economic of biodiesel with teachers in a city of technology center for Natal-RN / Fonte de energia alternativa: um estudo sobre a percepção ambiental, social e econômica do biodiesel com docentes do Centro de Tecnologia do gás da cidade de Natal RN
Meaning fuel and renewal energy sources derivative additives, the term biodiesel exists in Brazil since 1980, when it was signed its first patent by Expedito Parente. Since then, its importance has grown gradually due to the worsening of the ambient problems, since its use has became a highly promising alternative to the pollution decrease, as in the carbon
Publicado em: 2009
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2. Chemical modifications in lignocellulosic fibers to obtain and use in biosensor array phenolic derivative of LCC and the biosorption of metals / Modificações químicas em fibras lignocelulósicas para obtenção e aplicação em biocompósitos de matriz fenólica derivada de LCC e na biossorção de metais
In this work, lignocellulosic fibers from two sources (sisal and banana pseudo stem) were used as reinforcing agents in the preparation of phenolic matrix composites derived from cashew nut shell liquid (CNSL) and as material to adsorb toxic metals (Pb+2, Ni+2, Cd+2, Zn+2 and Cu+2). Surface changes were induced in the sisal fibers by immersion in alkali solu
Publicado em: 2008
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3. Phytochemical study of the NortheastÂs plants: Amnona squamosa Obtaining derivatives reaction of kaurenoic acid / Estudo fitoquÃmico de plantas do Nordeste: Amnona squamosa ObtenÃÃo de Derivados Reacionais do Ãcido CaurenÃico
Annona squamosa is a common tree popularly know as âataâ. In the folk medicine is used for treatment of stomach diseases, headache, diarrhea and for removal of louse. Phytochemical investigation of EtOH and hexanic extraction using chromatographic techniques allowed identification of kaurenoic acid an 16b, 17-Dihidroxy-ent-kauran-19-oic acid. Derivative of
Publicado em: 2007
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4. Comparação de tecnicas de analise de risco aplicadas ao desenvolvimento de campos de petroleo / Comparison of tecniques for risk analysis applied to petroleum field development
Petroleum field decision-making process is associated to high risks due to geological, economic and technological uncertainties, and high investments, mainly in the appraisal and development phases of petroleum fields where it is necessary to model the recovery process with higher precision increasing the computational time. One way to speedup the process is
Publicado em: 2005
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5. Dynamical symmetry restoration for a higher-derivative four-fermion model in an external electromagnetic field
A four-fermion model with additional higher-derivative terms is investigated in an external electromagnetic field. The effective potential in the leading order of large-N expansion is calculated in external constant magnetic and electric fields. It is shown that, in contrast to the former results concerning the universal character of "magnetic catalysis" in
Brazilian Journal of Physics. Publicado em: 2000
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6. Fierz-Pauli higher derivative gravity
We consider a model for gravity in which the linear part of the four-derivative terms òRmn Rmn d4 x and òR² Brazilian Journal of Physics. Publicado em: 2000
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7. Interaction of an alkylating camptothecin derivative with a DNA base at topoisomerase I-DNA cleavage sites.
DNA topoisomerase I (top1) is a ubiquitous nuclear enzyme. It is specifically inhibited by camptothecin, a natural product derived from the bark of the tree Camptotheca acuminata. Camptothecin and several of its derivatives are presently in clinical trial and exhibit remarkable anticancer activity. The present study is a further investigation of the molecula
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8. Characterization and symbiotic importance of acidic extracellular polysaccharides of Rhizobium sp. strain GRH2 isolated from acacia nodules.
Rhizobium sp. wild-type strain GRH2 was originally isolated from root nodules of the leguminous tree Acacia cyanophylla and has a broad host range which includes herbaceous legumes, e.g., Trifolium spp. We examined the extracellular exopolysaccharides (EPSs) produced by strain GRH2 and found three independent glycosidic structures: a high-molecular-weight ac
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9. Expansins Abundant in Secondary Xylem Belong to Subgroup A of the α-Expansin Gene Family1[w]
Differentiation of xylem cells in dicotyledonous plants involves expansion of the radial primary cell walls and intrusive tip growth of cambial derivative cells prior to the deposition of a thick secondary wall essential for xylem function. Expansins are cell wall-residing proteins that have an ability to plasticize the cellulose-hemicellulose network of pri
American Society of Plant Biologists.