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Search Results: 1 - 10 of 136 matches for " Neli Kika;Roese "
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Antibacterial activity of orsellinates
Gomes, Alcir Teixeira;Smania Júnior, Artur;Seidel, Cintia;Smania, Elza de Fátima Albino;Honda, Neli Kika;Roese, Fernanda Mesquita;Muzzi, Rozanna Marques;
Brazilian Journal of Microbiology , 2003, DOI: 10.1590/S1517-83822003000300002
Abstract: in order to obtain new compounds with antibacterial activity, the derivatives 2,4-dihydroxy-6-methylbenzoic acid (orsellinic acid) and 2,4-dihydroxy-6-methylbenzoates (orsellinates) were obtained through alcoholyses of lecanoric acid. all these substances were tested against gram-positive and gram-negative bacteria by a microdilution method. staphylococcus aureus, xanthomonas campestris var. vesicatoria and ralstonia solanacearum were most sensitive to n-propyl 2,4-dihydroxy-6-methylbenzoate, n-pentyl 2,4-dihydroxy-6-methylbenzoate and n-hexyl 2,4-dihydroxy-6-methylbenzoate with mic (minimal inhibitory concentration) values ranging from 62.5 to 7.8 μg×ml1. these results showed that homologation in carbon chain may lead to compounds with more pronunced activities.
A química dos liquens
Honda, Neli Kika;Vilegas, Wagner;
Química Nova , 1999, DOI: 10.1590/S0100-40421999000100018
Abstract: lichens are symbiotic associations between fungi and algae and/or cyanobacteria. they produce common intracellular products including proteins, amino acids, polyols, carotenoids, polysaccharides and vitamins. the secondary metabolites found in lichens are phenolics which accumulate either on the cortex or on the cell walls of medullary hyphae and they are mainly acetyl-polimalonyl pathway derivatives. polysaccharides, proteins and secondary metabolites produced by lichens have attracted the attention of investigators due their biological activities. this revision coments about the biosynthetic origin and structures of the principal classes of compounds produced by these organisms.
A química dos liquens
Honda Neli Kika,Vilegas Wagner
Química Nova , 1999,
Abstract: Lichens are symbiotic associations between fungi and algae and/or cyanobacteria. They produce common intracellular products including proteins, amino acids, polyols, carotenoids, polysaccharides and vitamins. The secondary metabolites found in lichens are phenolics which accumulate either on the cortex or on the cell walls of medullary hyphae and they are mainly acetyl-polimalonyl pathway derivatives. Polysaccharides, proteins and secondary metabolites produced by lichens have attracted the attention of investigators due their biological activities. This revision coments about the biosynthetic origin and structures of the principal classes of compounds produced by these organisms.
Avalia??o da concentra??o de alguns íons metálicos em diferentes espécies de líquens do cerrado Sul-Mato-Grossense
Raposo Junior, Jorge Luiz;Ré-Poppi, Nilva;Honda, Neli Kika;
Química Nova , 2007, DOI: 10.1590/S0100-40422007000300015
Abstract: concentrations of fe, mn, co, cr, zn and cu were determinated using flame atomic absorption spectrometry in nine lichen species of the sul-mato-grossense cerrado. the average metal ion concentrations varied in the following ranges: fe, 248.41-1568.01; mn, 98.50-397.33; co, 10.08-24.81; cr, 18.24-44.26; zn, 14.62-34.79 and cu, 3.23-7.57 mg kg-1. statistical analysis (pearson and cluster) applied to the metal ion concentrations indicated that the accumulation of these ions can be due to several anthropogenic sources including agricultural activities, mineral exploration, biomass burning, soil mineral composition and leather tanning processes by chromium.
Allelopathic potential of orsellinic acid derivatives
Peres, Marize Terezinha Lopes Pereira;Mapeli, Ana Maria;Faccenda, Odival;Gomes, Alcir Teixeira;Honda, Neli Kika;
Brazilian Archives of Biology and Technology , 2009, DOI: 10.1590/S1516-89132009000400027
Abstract: environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. the bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of lactuca sativa cv. grand rapids and allium cepa cv. baia periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. each substance was tested at concentrations of 10-3, 10-5, 10-7 m, and 10-9 m. the results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. also, a. cepa was more sensitive to the compounds assayed, at the concentrations tested. nearly all the esters exhibited significant effects, a feature that could makes them promising for the development of new natural herbicides.
Avalia??o do perfil cromatográfico em espécies de Polygonum e amostras comercializadas como "erva-de-bicho"
Cardoso, Cláudia Andréa Lima;Honda, Neli Kika;Dias, Edna Scremin;
Revista Brasileira de Farmacognosia , 2006, DOI: 10.1590/S0102-695X2006000200018
Abstract: the species polygonum punctatum, polygonum hydropiperoides, polygonum ferrugineum, polygonum acuminatum were analyzed and compared with commercialized samples of "erva-de-bicho". this analysis was performed using high performance liquid chromatography. it was verified that the analyzed samples show a distinct. the chromatographic profile of the samples commercialized as "erva-de-bicho" was similar to the polygonum acuminatum or polygonum ferrugineum profiles, or did not present peaks in the chromatograms. the chromatographic profiles were monitored in the 254 nm and 362 nm.
Bioactive derivatives obtained from lecanoric acid, a constituent of the lichen Parmotrema tinctorum (Nyl.) Hale (Parmeliaceae)
Gomes, Alcir Teixeira;Honda, Neli K.;Roese, Fernanda Mesquita;Muzzi, Rozanna M.;Marques, Maria Rita;
Revista Brasileira de Farmacognosia , 2002, DOI: 10.1590/S0102-695X2002000300036
Abstract: with the aim of obtaining new compounds with potential antifungal activity, lecanoric acid, a chemical constituent of the lichen parmotrema tinctorum and its derivatives prepared from structural modification were tested against the fungus cladosporium sphaerospermum, by employing the bioautographic method. activity of the derivatives ranged from 10- to 1-μg concentrations. results demonstrated this series of compounds to have potent fungitoxic activity.
Gas Chromatography-Mass Spectrometry (GC-MS) and evaluation of antioxidant and antimicrobial activities of essential oil of Campomanesia adamantium (Cambess.) O. Berg (Guavira)
Coutinho, Isabel Duarte;Cardoso, Claúdia Andréa Lima;Ré-Poppi, Nilva;Melo, Adriana Mestriner;Vieira, Maria do Carmo;Honda, Neli Kika;Coelho, Roberta Gomes;
Brazilian Journal of Pharmaceutical Sciences , 2009, DOI: 10.1590/S1984-82502009000400022
Abstract: the essential oils from campomanesia adamantium (cambess.) o. berg leaves, collected in the reproductive (flowering and fruit-bearing) and vegetative stages, were characterized by gc-ms (gas chromatography-mass spectrometry). a total of 95 compounds of the essential oils were identified. in the reproductive stage (flowering) the major constituents were monoterpenes (limonene, α-pinene and β-pinene) while during the vegetative stage the major constituents were the sesquiterpenes (bicyclogermacrene and globulol). the essential oil of the reproductive stage shows high antimicrobial activity against staphylococcus aureus, pseudomonas aeruginosa and candida albicans, and all show moderate activity against escherichia coli. the essential oils were also evaluated for their radical-scavenging activity by dpph. the chemogeographical variations of the oil composition from the four distinct localities studied all contained α-pinene, β-pinene, limonene, linalool, β-caryophyllene, germacrene d and bicyclogermacrene, however the samples from jardim city contained neither limonene nor linalool.
O mondovino de cabe?a para baixo: as transforma??es no mercado internacional do vinho e o novo empresariado vinícola
Roese, Mauro;
Revista de Sociologia e Política , 2008, DOI: 10.1590/S0104-44782008000200007
Abstract: the backdrop of this paper is the radical transformation of the entrepreneurial world in winegrowing that has been brought about by the entrance of new producers and the emergence of a new and now global culture of wine consumption. i analyze this transformation in the light of contributions made by a new economic sociology, as well as by social science perspectives on science and technology. the "popularization" of consumption is a reflection of the growth in the offer of quality wines as well as the price drop that has been made possible through the dissemination of technology and knowledge. this process has led to a loss of the "secrecy" that once surrounded the production of quality wines: what was once the privilege of a few producers and regions, kept under lock and key by family producers, has now become an object that can be apprehended and obtained through investments in technology and training. as a result, new producers of high quality wine have emerged in countries like chile, australia, south africa and brazil, among others. this transformation may be seen from two particular angles: one which focuses on the product's lost "aura" and with it, producers' and consumers' loss of privilege, and another which is linked to the social production of a new market including new producers and widening consumer access to quality wines. . this expansion of supply and consumption of quality wines has, nonetheless, been accompanied by the transformation of traditional winegrowers into cult objects that have become synonymous with exclusivity and distinction. the latter have thus become more restrictive and their wines, overvalued.
Cuidado terapêutico e espiritual: a abordagem de trabalho com grupos
Anete Roese
Caminhando , 2010,
Abstract: The text presents a critical analysis of any therapeutic perspective focused solely on the individual and the individualization of suffering and healing. It provides the theoretical basis of group care as a social space for coping with conflicts and sufferings.
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