4 documents found, page 1 of 1
Cyclo-(trp-phe) diketopiperazines from the endophytic fungus Aspergillus versic...
Gubiani,Juliana R.; Teles,Helder L.; Silva,Geraldo H.; Young,Maria Cláudia M.; Pereira,José O.; Bolzani,Vanderlan S.; Araujo,Angela R.Six known compounds, three peptide derivatives: cyclo-(tryptophyl-phenylalanyl) (2), diketopiperazine dimer WIN 64821 (3) and 3-hydroxy-15H-tryptophenaline (4), one adenine derivative: 2-hydroxy-6-N-isopentenyl-adenine (5), one phtalide derivative: 4-methoxyphtalide (1) and one benzoic acid derivative: 3-hydroxy-4-(1-hydroxy-1,5-dimethyl-hexyl) benzoic acid (6), were isolated from the ethyl acetate extract of t...
Genetic diversity in natural populations of Jacaranda decurrens Cham. determine...
Bertoni,Bianca W.; Telles,Mariana P. de C.; Malosso,Milena G.; Torres,Simone C.Z.; Pereira,José O.; Lourenço,Mirian V.; França,Suzelei de C.Jacaranda decurrens (Bignoniaceae) is an endemic species of the Cerrado with validated antitumoral activity. The genetic diversity of six populations of J. decurrens located in the State of São Paulo was determined in this study by using molecular markers for randomly amplified polymorphic DNA (RAPD) and amplified fragment length polymorphism (AFLP). Following optimization of the amplification reaction, 10 sele...
A new guaiane mannoside from a Eutypa-like fungus isolated from Murraya panicul...
Souza,Afonso D. L.; Rodrigues-Filho,Edson; Souza,Antonia Q. L.; Henrique-Silva,Flavio; Pereira,José O.A Eutypa-like fungus was isolated from the stems of Murraya paniculata. The fungus was cultivated in liquid medium and produced the new guaiane-type sesquiterpenoid (1R,4S,5S,7R,10R)-10-hydroxyguaianol 10-O-β-mannopyranoside and the 3-hydroxy-5-phenylmethyl-(3S,5R)-tetrahydrofuran-2-one, a diastereomer of harzialactone A, obtained for the first time from a natural source. The structures of these metabolites wer...
Caracterização do Espectro Polínico dos Méis do Alentejo (Portugal)
Maia,Miguel; Russo-Almeida,Paulo A.; Pereira,José O.Analisámos o espectro polínico de 36 amostras de mel da cresta de 2000 provenientes da região do Alentejo (Portugal). As amostras foram tratadas pelo método de acetólise e contados pelo menos 1200 grãos de pólen por amostra. Foram identificadas 27 famílias botânicas e 36 tipos polínicos. As principais espécies nectaríferas identificadas no espectro polínico foram a Lavandula stoechas e o Echium plantagineum. Da...