16 documents found, page 1 of 2
A química dos liquens
Honda, Neli Kika; Vilegas, Wagner [UNESP]Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:48:25Z No. of bitstreams: 1 S0100-40421999000100018.pdf: 316731 bytes, checksum: e205e525428955ebe37defc746b894f4 (MD5); Made available in DSpace on 2013-08-22T18:48:25Z (GMT). No. of bitstreams: 1 S0100-40421999000100018.pdf: 316731 bytes, checksum: e205e525428955ebe37defc746b894f4 (MD5) Previous issue date: 1999-02-01; Made availabl...
Evaluation of anti-Mycobacterium tuberculosis activity of Campomanesia adamanti...
Pavan, Fernando Rogério [UNESP]; Leite, Clarice Queico Fujimura [UNESP]; Coelho, Roberta Gomes; Coutinho, Isabel Duarte; Honda, Neli KikaSubmitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:48:47Z No. of bitstreams: 1 S0100-40422009000500026.pdf: 165782 bytes, checksum: c3285d4ad44af1848db02a843a92a85e (MD5); Made available in DSpace on 2013-08-22T18:48:47Z (GMT). No. of bitstreams: 1 S0100-40422009000500026.pdf: 165782 bytes, checksum: c3285d4ad44af1848db02a843a92a85e (MD5) Previous issue date: 2009-01-01; Made availabl...
Phenolic compounds and antioxidant, antimicrobial and antimycobacterial activit...
Lima Cardoso, Claudia Andrea; Coelho, Roberta Gomes; Honda, Neli Kika; Pott, Arnildo; Pavan, Fernando Rogério [UNESP]Made available in DSpace on 2014-12-03T13:11:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-10-01Bitstream added on 2014-12-03T13:22:29Z : No. of bitstreams: 1 S1984-82502013000400017.pdf: 361194 bytes, checksum: 082d99eadbdf06155bb6b12fa7b3ff66 (MD5); Fundacao de Apoio ao Desenvolvimento do Ensino, Ciencia e Tecnologia do Estado de Mato Grosso do Sul (FUNDECT); Conselho Nacional de Desenvolvimento C...
Phenolic compounds and antioxidant, antimicrobial and antimycobacterial activit...
Cardoso, Claudia Andréa Lima; Coelho, Roberta Gomes; Honda, Neli Kika; Pott, Arnildo; Pavan, Fernando Rogério; Leite, Clarice Queico FujimuraSerjania erecta Radlk.(Sapindaceae) is a medicinal plant traditionally used in Brazil. We assayed the ethanolic extract of leaves and roots against seven microorganisms. The REMA (Resazurin Microtiter Assay) assay was used to measure the biological activity in vitro against Mycobacterium tuberculosis and our results showed moderate activity of the ethanolic extract. On the other hand S. aureus, P. aeruginosa, S...
Constituintes químicos e avaliação do potencial alelopático de Adiantum tetraph...
Melos, Jorge Luiz Ribeiro de; Silva, Luciana Barbosa; Peres, Marize Terezinha Lopes Pereira; Mapeli, Ana Maria; Faccenda, OdivalChemical studies of green leaves of A. tetraphyllum afforded b-sitosterol, a mixture containing the ethyl esters of long chain carboxylic acids, 30-normethyl-lupan-20-one, hopan-22-ol, phytol, phyten-3(20)-1,2-diol, quercetin and quercetin-3-O-b-D-glucoside. The structures of the compounds were elucidated by spectroscopic and GC analysis. The allelopathic potentials of the crude ethanolic extract and fractions ...
Antibacterial activity of orsellinates
Gomes, Alcir Teixeira; Smania Júnior, Artur; Seidel, Cintia; Smania, Elza de Fátima Albino; Honda, Neli Kika; Roese, Fernanda MesquitaPara obter novos compostos com atividade antibacteriana, foram preparados os derivados 2,4-diidróxi-6-metilbenzoatos (orselinatos) e o ácido 2,4-diidróxi-6-metilbenzóico (ácido orselínico) através de reações de alcoólise do ácido lecanórico. Todas as substâncias foram testadas contra bactérias Gram-positivas e Gram-negativas pelo método da microdiluição. Staphylococcus aureus, Xanthomonas campestris var. vesica...
Bioactive derivatives obtained from lecanoric acid, a constituent of the lichen...
Gomes, Alcir Teixeira; Honda, Neli Kika; Roese, Fernanda Mesquita; Muzzi, Rozanna Marques; Marques, Maria RitaWith 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 co...
Evaluation of anti-Mycobacterium tuberculosis activity of Campomanesia adamanti...
Pavan, Fernando Rogério; Leite, Clarice Queico Fujimura; Coelho, Roberta Gomes; Coutinho, Isabel Duarte; Honda, Neli Kika; Cardoso, Cláudia Andréa LimaThe anti-Mycobacterium tuberculosis activity of Campomanesia adamantium fruits extracts were evaluated. Six compounds, identified as flavanones and chalcones were quantified by HPLC-DAD-UV. Promising antitubercular activity was observed with ethyl acetate extract (MIC 62.5 µg/mL) and their fractions (MIC values ranging from 39 to above 250 µg/mL). The better MIC result of 39 µg/mL was associated with two fracti...
Chemical modifications of a natural xanthone and antimicrobial activity against...
Micheletti, Ana Camila; Honda, Neli Kika; Lima, Dênis Pires de; Beatriz, Adilson; Sant'ana, Maria Rita; Carvalho, Nádia Cristina PereiraA series of 15 ω-aminoalkoxylxanthones containing methyl, ethyl, propyl, tert-butylamino and piperidinyl moieties were synthesized from a natural xanthone isolated from a lichen species. These compounds were tested for their in vitro antibacterial properties against Gram-positive and Gram-negative bacteria and cytotoxicity against a number of human tumor cell lines was too evaluated. The newly synthesized deriv...
A química dos liquens
Honda, Neli Kika; Vilegas, WagnerLichens 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. Polysacch...