5 documents found, page 1 of 1
Bioassay-guided fractionation and antimicrobial and cytotoxic activities of Cas...
Cunha,Luís C.S.; Morais,Sérgio A.L. de; Aquino,Francisco J.T. de; Chang,Roberto; Oliveira,Alberto de; Martins,Mário M.; Martins,Carlos H.G.ABSTRACT The antimicrobial potential of extracts of bark and leaves of Cassia bakeriana Craib, Fabaceae, against aerobic and anaerobic oral bacteria was evaluated by the microdilution broth method. For crude ethanol extracts and organic fractions tested, the bark dichloromethane phase showed a significant antibacterial effect, with MIC values ranging from 12.5 to 100 µg/ml for most of the microorganisms tested....
QUALIDADE DO CARVÃO VEGETAL PARA O CONSUMO DOMÉSTICO COMERCIALIZADO NA REGIÃO S...
Brand,Martha Andreia; Rodrigues,Aline Almada; Oliveira,Alberto de; Machado,Mauro Silveira; Zen,Linéia RobertaEste trabalho teve como objetivo averiguar a qualidade do carvão vegetal para consumo doméstico, comercializado na região Serrana Sul de Santa Catarina. Foram coletadas 12 marcas de carvão na região da Associação dos Municípios da Região Serrana (AMURES) e Curitibanos. Foram descritas e analisadas as características gerais das embalagens e determinadas as propriedades físicas e energéticas de cada uma das marca...
Antifungal activity of natural and synthetic amides from Piper species
Marques,Joaquim V.; Oliveira,Alberto de; Raggi,Ludmila; Young,Maria C. M.; Kato,Massuo J.The antifungal leaves extract from Piper scutifolium was submitted to bioactivity-guided chromatographic separation against Cladosporium cladosporioides and C. sphaerospermum yielding piperine, piperlonguminine and corcovadine as the active principles which displayed a detection limit of 1 µg. Structure-activity relationships were investigated with the preparation of twelve analogs having differences in the num...
3-Ishwarone and 3-Ishwarol, rare sesquiterpenes in essential oil from leaves of...
Lago,João Henrique G.; Oliveira,Alberto de; Guimarães,Elsie F.; Kato,Massuo J.The essential oil from Peperomia oreophila leaves (Piperaceae) was submitted to fractionation in silica gel column. This separation procedure yielded a fraction composed of a hydrocarbon sesquiterpene mixture which was identified as beta-elemene, alpha-ylangene, alpha-guaiene and beta-selinene. Besides, spathulenol and two sesquiterpenes with the rare ishwarane skeleton: 3-ishwarol and 3-ishwarone were also ide...
Novos Territórios Produtivos, Mudança Tecnológica e Mercado de Trabalho: O Caso...
Bernardes,Roberto; Oliveira,Alberto deThis article examines the extent to which the new economic institutional environment, the investment cycle, and the effects of industrial changes are affecting the labor market in São José dos Campos, São Paulo, Brazil. In the late 1990s, the region underwent a phase of economic prosperity with a major renewal of its technological complex, increased production, and employment sustained by the aircraft industry....