Chemotaxonomy
Mostrando 13-24 de 25 artigos, teses e dissertações.
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13. Chemotaxonomy of three genera of the annonaceae family using self-organizing maps and 13C NMR data of diterpenes
The Annonaceae family is distributed throughout Neotropical regions of the world. In Brazil, it covers nearly all natural formations particularly Annona, Xylopia and Polyalthia and is characterized chemically by the production of sources of terpenoids (mainly diterpenes), alkaloids, steroids, polyphenols and, flavonoids. Studies from 13C NMR data of diterpen
Quím. Nova. Publicado em: 2012
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14. ESTUDO COMPARATIVO DE ÓLEOS ESSENCIAIS DE ESPÉCIES DE CROTON DO ESTADO DE SERGIPE. / COMPARATIVE STUDY OF ESSENTIAL OILS OF SPECIES OF THE STATE OF CROTON SERGIPE.
Este trabalho relata o estudo da composição e variação dos componentes químicos do óleo essencial das espécies de Croton do estado de Sergipe dando ênfase a sua importância quimiotaxonômica. Os óleos essenciais das partes aéreas frescas obtidos por hidrodestilação das amostras de Croton blanchetianus (CB-GA), C. campestris (CC-AML), C. heliotro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2011
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15. Perfil químico micromolecular e análise quimiotaxonômica dos gêneros Stevia Cav.E Mikania Willd.(Asteraceae,Eupatorieae) / Chemotaxonomy of genus mikania willd. (Asteraceae) based on chemical profile database and multivariate analysis
O gênero Mikania (Asteraceae, tribo Eupatorieae) apresenta aproximadamente 450 espécies, muitas delas especialmente importantes por seu uso em medicina tradicional. Para a análise quimiotaxonômica, um banco de dados acerca da composição micromolecular de Mikania foi criado. Foram elaboradas análises de agrupamento e de componentes principais, bem como
Publicado em: 2010
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16. Emprego de redes neurais e de descritores moleculares em quimiotaxonomia da família Asteraceae / Use of Neural Networks and Molecular Descriptors in Chemotaxonomy of the Asteraceae Family
Esse trabalho descreve o desenvolvimento de uma nova ferramenta quimioinformática designada de SISTEMATX que possibilitou a análise quimiotaxonômica da família Asteraceae, empregando novos parâmetros moleculares, bem como o estudo da relação quantitativa estrutura química atividade biológica de substâncias provenientes desse grupo vegetal. A famíl
Publicado em: 2008
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17. Aplication of the NMR and IR spectroscopic techniques and chemometrics methods in lichens chemotaxonomy. / Aplicação das técnicas espectroscópicas de RMN e IV e de métodos quimiométricos na quimiotaxonomia de liquens. / Aplicação das técnicas espectroscópicas de RMN e IV e de métodos quimiométricos na quimiotaxonomia de liquens. / Aplication of the NMR and IR spectroscopic techniques and chemometrics methods in lichens chemotaxonomy. / Aplicação das técnicas espectroscópicas de RMN e IV e de métodos quimiométricos na quimiotaxonomia de liquens. / Aplication of the NMR and IR spectroscopic techniques and chemometrics methods in lichens chemotaxonomy.
This present work describes the chemotaxonomic analysis of lichens through the utilization of NMR spectroscopic techniques, HR-MAS and NMR in solution, and IR allied with chemometrics methods. This analysis were carried out with eleven species set of lichens divided in two families and six genera. The HR-MAS NMR spectra together the chemometric, obtained fro
Publicado em: 2007
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18. Análise química e taxonômica de espécies de hypericum e avaliação da atividade antiangiogênica / Chemical and taxonomic analysis of Hypericum species and antiangiogenic activity
A comercialização de fitoterápicos obtidos a partir de extratos de H. perforatum para o tratamento de depressão em diversas partes do mundo despertou o interesse de investigadores no estudo de plantas do gênero Hypericum, tanto acerca da composição química quanto das propriedades biológicas destas espécies. Objetivos: Investigar a constituição qu
Publicado em: 2007
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19. Flavonoids, coumarins and benzofuranes as chemotaxonomic markers in the Asteraceae / Flavonóides, cumarinas e benzofuranos como marcadores quimiotaxonômicos em Asteraceae
This work describes the natural occurrences of flavonoids, coumarins and benzofurans in the family of plants, Asteraceae / Compositae. It has as main purpose to classify the referred secondary metabolites as possible chemotaxonomic markers of the family as well as to do predictions of occurrences of the latter. For its accomplishment, a database of occurrenc
Publicado em: 2003
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20. Identification of Turicella otitidis isolated from a patient with otorrhea associated with surgery: differentiation from Corynebacterium afermentans and Corynebacterium auris.
Turicella otitidis is a newly described coryneform bacterium isolated from middle ear fluids. We report here on the diagnosis of a strain isolated from otorrhea. The API Coryne system (bioMérieux, Marcy I'Etoile, France) used alone failed to differentiate T. otitidis, Corynebacterium afermentans, and Corynebacterium auris (ANF group). Biochemical tests such
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21. Chemotaxonomy of Gibberella zeae with special reference to production of trichothecenes and zearalenone.
By adopting a single-spore isolation technique, 113 isolates of Gibberella zeae, the perfect stage of Fusarium graminearum, were isolated from rice stubbles in barley and wheat fields and tested for production of trichothecenes and zearalenone on rice grains. Of the isolates, 93% produced the trichothecenes, and they could be subdivided into two chemotaxonom
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22. Use of chemotaxonomy as an aid to differentiate among Capnocytophaga species, CDC group DF-3, and aerotolerant strains of Leptotrichia buccalis.
Four strains of fastidious gram-negative rods, thought to be Capnocytophaga species (formerly CDC group DF-1 or Bacteroides ochraceus) or CDC group DF-3 on the basis of conventional phenotypic criteria, were also analyzed for cellular fatty acid (CFA) composition. It was found that the CFA compositions of these strains were qualitatively incorrect for those
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23. Characterization of Calcium Oxalates Generated as Biominerals in Cacti1
The chemical composition and morphology of solid material isolated from various Cactaceae species have been analyzed. All of the tested specimens deposited high-purity calcium oxalate crystals in their succulent modified stems. These deposits occurred most frequently as round-shaped druses that sometimes coexist with abundant crystal sand in the tissue. The
American Society of Plant Physiologists.
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24. Ether polar lipids of methanogenic bacteria: structures, comparative aspects, and biosyntheses.
Complete structures of nearly 40 ether polar lipids from seven species of methanogens have been elucidated during the past 10 years. Three kinds of variations of core lipids, macrocyclic archaeol and two hydroxyarchaeols, were identified, in addition to the usual archaeol and caldarchaeol (for the nomenclature of archaeal [archaebacterial] ether lipids, see