Phenolic Metabolism
Mostrando 13-24 de 66 artigos, teses e dissertações.
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13. Efeito do dano físico sobre o metabolismo de folhas de taioba, Xanthosoma sagittifolium (L.) Schott / Effects of wounding on the metabolism of tannia leaves, Xanthosoma sagittifolium (L.) Schott
Vegetables like leaves of tannia are subject to various factors which cause deterioration. Among these factors, mechanical damage triggers a series of physiological responses that occur at the site of the injury and surrounding tissues. The objective of this study was to evaluate the physiological responses of tannia leaves mechanical damaging, and whether t
Publicado em: 2009
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14. Anatomic and physiological characterization and conservation of minimally processed carrots / Caracterização anatômico-fisiológica e conservação de cenoura minimamente processada
The objective of this study was to characterize the dehydration, white blush and histological location of suberin, lignin and phenolic compounds and assess their contribution to superficial white blush in baby carrots. The effects were assessed of the controlled atmospheres consisting of 2 % O2 + 15 % CO2, 5 % O2 + 5 % CO2 and 10 % O2 + 10 % CO2, all with N2
Publicado em: 2008
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15. Ação inibitória de extratos de plantas do Cerrado sobre α-amilases com ênfase em Kielmeyera coriacea
α-amylases are digestive enzymes widely distributed in microrganims, plants and animals, that catalyze hidrolysis of α-1,4 glicosidic bonds and act in carbohydrate metabolism. The inhibition of α-amylases can be applied on control of insect pests that depends on starch-rich diet to energy production, reducing the amount of nutrients to avoid i
Publicado em: 2008
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16. Microrganismos promissores para a degradação de compostos fenólicos presentes em bagaço-de-cana, lodo e águas residuárias de agroindústria sucro-alcooleira. / Promising microorganisms for the degradation of phenolic compounds present in sugarcane bagasse, mud and wasterwater of the sugar-alcohol agroindustry
Eight strains of bacteria (L1-L8) were isolated from the mud of a decantation lake (A) from the Station of Effluent Treatment (SET) of the S. A. Usina Coruripe Açúcar e Álcool, in the harvest season of 2004/05. Three of these bacteria were considered facultative anaerobes (L3, L7 and L8). The isolates were identified as species of the genus Achromobacter
Publicado em: 2007
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17. Fenóis totais no cafeeiro em razão das fases de frutificação e do clima. / Total phenols in the coffee tree due to the fructification phases and the climate.
The vegetables show a natural defense against external factors, biotic and abiotic, by the synthesis of the phenolic compounds in the secondary metabolism, which varies with the maturity state and with the climate. The increase of phenolic compounds in the plants is directly related to the resistance to the infection thought pathogens and insect infestation.
Publicado em: 2005
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18. Inhibition of phenolic acid metabolism results in precocious cell death and altered cell morphology in leaves of transgenic tobacco plants
Several complex phenotypic changes are induced when the transcription factor AmMYB308 is overexpressed in transgenic tobacco plants. We have previously shown that the primary effect of this transcription factor is to inhibit phenolic acid metabolism. In the plants that we produced, two morphological features were prominent: abnormal leaf palisade development
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19. The AmMYB308 and AmMYB330 transcription factors from antirrhinum regulate phenylpropanoid and lignin biosynthesis in transgenic tobacco
MYB-related transcription factors are known to regulate different branches of flavonoid metabolism in plants and are believed to play wider roles in the regulation of phenylpropanoid metabolism in general. Here, we demonstrate that overexpression of two MYB genes from Antirrhinum represses phenolic acid metabolism and lignin biosynthesis in transgenic tobacc
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20. Phenolic Compound Utilization by the Soft Rot Fungus Lecythophora hoffmannii
Nine phenolic compounds were metabolized by the soft rot fungus Lecythophora hoffmannii via protocatechuic acid and subsequently cleaved by protocatechuate 3,4-dioxygenase as determined by oxygen uptake, substrate depletion, and ring cleavage analysis. Catechol was metabolized by catechol 1,2-dioxygenase. Fungal utilization of these aromatic compounds may be
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21. The integrity of the ether linkage during thyroxine metabolism in man
The structures of thyroxine metabolites after total deiodination bear on the mode of thyroxine (T4) action in vivo. The present study was undertaken to determine the integrity of the ether linkage during thyroxine metabolism in man. Normal volunteers were given simultaneous intravenous injections of two thyroxines labeled with either 14C or 3H on the opposit
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22. Expression in Escherichia coli of Native and Chimeric Phenolic Acid Decarboxylases with Modified Enzymatic Activities and Method for Screening Recombinant E. coli Strains Expressing These Enzymes
Four bacterial phenolic acid decarboxylases (PAD) from Lactobacillus plantarum, Pediococcus pentosaceus, Bacillus subtilis, and Bacillus pumilus were expressed in Escherichia coli, and their activities on p-coumaric, ferulic, and caffeic acids were compared. Although these four enzymes displayed 61% amino acid sequence identity, they exhibit different activi
American Society for Microbiology.
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23. Plant Hormone Interaction and Phenolic Metabolism in the Regulation of Russet Spotting in Iceberg Lettuce 1
Russet spotting (RS) is a physiological disorder induced in iceberg lettuce (Lactuca sativa L.) by exposure to parts per million levels of ethylene at 5 ± 2°C. Ethylene induced phenylalanine ammonia-lyase and ionically bound peroxidase activities that correlated with development of RS symptoms. The ethylene-treated tissue had significantly higher lignin co
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24. Induced Responses in Phenolic Metabolism in Two Norway Spruce Clones after Wounding and Inoculations with Ophiostoma polonicum, a Bark Beetle-Associated Fungus.
Two Norway spruce (Picea abies Karst.) clones, one resistant and the other susceptible to mass inoculation with Ophiostoma polonicum Siem., were compared with regard to their phenolic compositions and chalcone synthase (CHS) and stilbene synthase activities of their phloem before and at 6 and 12 d after artificial inoculation with sterile malt agar or O. pol