Encontrados 11 documentos, a visualizar página 1 de 2
O Ensino Superior em Évora: Memória e Projecto (1957-1975)
Silva, Augusto da; Segurado, Francisco; Oliveira, Maria da Conceição; Costa, RosalinaNo dia 1 de Outubro de 1961, a Companhia de Jesus voltou a Évora após dois séculos de ausência. Ao princípio na humildade de uma pequena residência, depois em edifício condigno que lhe cedeu, sem limite de tempo, o Eng.º Vasco Maria Eugénio de Almeida, Conde de Vill’Alva, e que para isso o adaptou especificamente. No entanto, já antes, a aspiração de muitos eborenses era dotar a cidade com estudos universitário...
Multinational telecommunications operators : impact of market factors and forei...
Oliveira, Maria da Conceição T. F. Monteiro H.Mestrado em Finanças ; Firms are exposed to foreign exchange risk when the results of their projects depend on future exchange rates and those exchange rates can not be fully anticipated. Through the last 50 years, exchange risk management has received increasing attention in both corporate practice and literature. Firms are also exposed to other market factors, domestic and internationally, with a major impac...
Diterpene and other constituents from Stemodia maritima (Scrophulariaceae)
Rodrigues,Francisco E. A.; Lima,Jefferson Q.; Oliveira,Maria da Conceição F. de; Vasconcelos,Jackson N.; Santiago,Gilvandete M. P.; Mafezoli,JairA new diterpene, (5S*,8S*,9R*,10S*)-11β,12β-epoxy-9α-hydroxy-19(4→3) abeo-abieta-3,13-diene-19,18-olide, together with the known compounds stemodin, D-mannitol, betulinic acid, a mixture of 3β-O-β-D-glucopyranosyl-β-sitosterol and 3β-O-β-D-glucopyranosylstigmasterol and 5,7,4'-trihydroxy-3,8,3'-trimethoxyflavone were isolated from the leaves and stems of Stemodia ma...
Candida tropicalis CE017: a new Brazilian enzymatic source for the bioreduction...
Vieira,Gizelle A. B.; Araujo,Daniel M. de Freitas; Lemos,Telma L. G.; Mattos,Marcos Carlos de; Oliveira,Maria da Conceição F. de; Melo,Vânia M. M.The reactivity and stereoselectivity showed by a new strain of Candida tropicalis in the reduction of prochiral ketones have been compared with the ones previously attained in our laboratory using microorganisms from the Brazilian biodiversity. In this manner, Candida tropicalis has demonstrated its versatility as stereoselective agent in the bioreduction of a series of aromatic ketones. These prochiral compoun...
Estudo químico e biológico de Tephrosia toxicaria Pers.
Vasconcelos,Jackson Nunes e; Lima,Jefferson Queiroz; Lemos,Telma Leda Gomes de; Oliveira,Maria da Conceição Ferreira de; Almeida,Maria Mozarina BeserraThe ethanol extracts from leaves, stems, pods and roots were assayed against the 3rd instar Aedes aegypti larvae and the highest activity was observed in the roots extracts (LC50 47.86 ppm). This extract was submitted to partition with hexane, chloroform, ethyl acetate and methanol. The respective fractions were bioassayed and the best larvicidal activities were identified in the hexane (LC50 23.99 ppm) and chl...
Constituents and antioxidant activity of two varieties of coconut water (Cocos ...
Fonseca,Aluísio M. da; Bizerra,Ayla M. C.; Souza,João Sammy N. de; Monte,Francisco José Q.; Oliveira,Maria da Conceição F. de; Mattos,Marcos C. deAn analysis of the constituents of coconut (Cocos nucifera L.) water from two fruit varieties (green and yellow) by hydrodistillation and solvent extraction showed the presence of alcohols, ketones, thiols, carboxylic acids, phenols, and esters. Substantial antioxidant activity was observed, using the DPPH assay, for the samples obtained by hydrodistillation and petroleum ether extraction of both coconut variet...
A new eremophilane-type sesquiterpene from the phytopatogen fungus Lasiodiplodi...
Nunes,Fátima M.; Oliveira,Maria da Conceição F. de; Arriaga,Ângela M. C.; Lemos,Telma L. G.; Andrade-Neto,Manoel; Mattos,Marcos C. de; Mafezoli,JairThe phytopatogenic fungus Lasiodiplodia theobromae, isolated from guava, was cultivated in rice for 32 days at room temperature. Extraction with CH2Cl2:MeOH (3:7), followed by chromatography fractionation of the extract provided ergosterol. From the fungus culture in Czapeck medium for 40 days at room temperature, were isolated isocoumarin cis-4-hydroxymeleine and an eremophilane-type sesquiterpene. The latter ...
Superação da dormência de sementes de Schinopsis brasiliensis
Oliveira,Maria da Conceição Prado de; Oliveira,Geraldo José deSchinopsis brasiliensis Engler (Anacardiaceae), popularmente conhecida como baraúna ou brauna, é uma árvore típica da caatinga, tem sementes de germinação difícil e demorada. O trabalho teve por objetivo avaliar a germinação das sementes de S. brasiliensis e indicar técnicas que tornem mais eficiente esse processo. Os frutos foram coletados em novembro de 2001 (período de frutificação), na Fazenda Juriti, munic...
Metabólitos secundários de Esenbeckia almawillia Kaastra (Rutaceae)
Barros-Filho,Bartholomeu A.; Nunes,Fátima M.; Oliveira,Maria da Conceição F. de; Andrade-Neto,Manoel; Mattos,Marcos C. de; Barbosa,Francisco G.The phytochemical investigation of the roots of E. almawillia is reported for the first time. Chromatographic fractionation of the methanol extract allowed the isolation of the alkaloids 3,3-diisopentenyl-N-methyl-2,4-quinoldione (1), maculine (2) and 3'-methoxygraveoline (3), (E)-N-isobutyl-3-methoxy-4,5-methylenedioxicinnamoyl amide (4), the flavones gardenine B (5) and nevadensin (6), and the sesquiterpene i...
A study of the sequential Michael addition-ring closure reaction of ethyl aceto...
Lopes,Regina C. V.; Oliveira,Maria da Conceição F. de; Lemos,Telma L. G. de; Mattos,Marcos C. deThe Michael addition of ethyl acetoacetate 1 to chalcone 2 under Solid/Liquid Phase Transfer Catalysis (SL-PTC), solvent free, afforded Michael adduct 3 and an annulated compound 4 in good yield. The cyclic compound 4 was obtained in the majority via an annulation process of the Michael adduct 3. The proportion of 4 in the ratio of 3/4 was dependant on the structure of the quaternary ammonium cation. The result...
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