Zobrazeno 1 - 10
of 16
pro vyhledávání: '"MARIO G. DE CARVALHO"'
Autor:
Queli C. Fidelis, Rosane N. Castro, Giselle M. S. P. Guilhon, Silvane T. Rodrigues, Cristiane M. C. de Salles, João B. de Salles, Mario G. de Carvalho
Publikováno v:
Molecules, Vol 17, Iss 7, Pp 7989-8000 (2012)
The chemical study of the extracts from leaves and stems of Ouratea ferruginea allowed the identification of a new isoflavone, 5-hydroxy-7,3′4′5′-tetramethoxyisoflavone, and twenty two known compounds, including friedelin, 3β-friedelinol, lupe
Externí odkaz:
https://doaj.org/article/8bfbceeddc994c93bd76176ad4e2b9d8
Autor:
ANGELA M.C. ARRIAGA, ALDENOR C. DE MESQUITA, YVONE B.M. POULIQUEN, ROBERTO A. DE LIMA, SERGIO H. CAVALCANTE, MARIO G. DE CARVALHO, JOSÉ A. DE SIQUEIRA, LEILA V. ALEGRIO, RAIMUNDO BRAZ-FILHO
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 74, Iss 3, Pp 415-424 (2002)
From the roots, stems and fruits of Simarouba versicolor (Simaroubaceae) were isolated quassinoids (3, 5-7), triterpenoids (8-14), a mixture of steroids (15-17), the flavonoid kaempferol (18) and the squalene derivative 11,14-diacetoxy-7,10; 15,18-di
Externí odkaz:
https://doaj.org/article/4a899af9115c44d686d0f5b0f9f53b03
Autor:
DÉBORA R. DE OLIVEIRA, MARIANA R. DA SILVA, OTAVIO A. CHAVES, ROSANE N. CASTRO, MARCIA C.C. DE OLIVEIRA, RAIMUNDO BRAZ-FILHO, MÁRIO G. DE CARVALHO
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 93, Iss 4 (2021)
Abstract Phytochemical studies of Cespedesia spathulata (Ochnaceae) leaves using 1H, 13C NMR, and GC-MS have led to the isolation of some metabolites identified for the first time in these species such as cathechin, epicatechin, vitexin, orientin, 6
Externí odkaz:
https://doaj.org/article/aa0c28bbe8274e98b3386e9c28313492
Autor:
KATHLYN V. GEVÚ, MÁRIO G. DE CARVALHO, ILNA G. DA SILVA, HELENA R.P. LIMA, ROSANE N. CASTRO, MAURA DA CUNHA
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 91, Iss 1 (2019)
Abstract: This study aims to identify phenolic compounds in dichloromethane and methanolic extracts of the rhizome of Renealmia nicolaioides collected in the North Region of Brazil. Two known diarylheptanoids, 1,7-bis(4-hydroxyphenyl)-(1E)-1-hepten-3
Externí odkaz:
https://doaj.org/article/b445c3d259a548818fcce732100752e7
Autor:
Diego F. Firmino, Theodora T. A. Cavalcante, Geovany A. Gomes, Nairley C. S. Firmino, Lucas D. Rosa, Mário G. de Carvalho, Francisco E. A. Catunda Jr
Publikováno v:
The Scientific World Journal, Vol 2018 (2018)
To assess the activities of essential oils derived from the trunk bark of Cinnamomum zeylanicum (EOCz) and Cinnamomum cassia (EOCc) as well as cinnamaldehyde on bacterial biofilms of clinical interest. Antimicrobial activity was assessed by the broth
Externí odkaz:
https://doaj.org/article/b138e60731dc4bc192df41d0cf24d1a6
Publikováno v:
Journal of Pharmacy & Pharmacognosy Research, Vol 2, Iss 1, Pp 14-18 (2014)
Context: Spermacoce verticillata, known as “poaia and vassourinha de botão”, is a species widely used in Brazilian traditional medicine as anti-inflammatory, antipyretic and analgesic. It is a native species, small, upright perennial, and broadl
Externí odkaz:
https://doaj.org/article/b712f367bfd54d1da291aeed158daa36
Autor:
Mário G. de Carvalho, Maritza A.R. Cardozo, Francisco E.A. Catunda Junior, Acácio G. de Carvalho
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 82, Iss 3, Pp 561-567 (2010)
The phytochemical investigation of Piptadenia gonoacantha (Mart.) J.F. Macbr. (Leguminosae-Mimosoideae), commonly known as "pau jacaré" (alligator stick), afforded sitosterol, campesterol, stigmasterol, the N-benzoylphenylalanine-2-benzoylamide-3-ph
Externí odkaz:
https://doaj.org/article/af6ac1b1f74b4428a2b6cbef6ac26e40
Autor:
Mário G. de Carvalho, Virginia C. da Silva, Tânia M.S. da Silva, Celso A. Camara, Raimundo Braz-Filho
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 81, Iss 1, Pp 21-28 (2009)
The reaction of the flavonol 3,7,3', 4'-tetra-O-methylquercetin (1) and of the isoflavone 7,4'-di-O-methylgenistein (2) with alkaline iodine in methanol afforded four new iodine derivatives: 8-iodo-5-hydroxy-3,7,3', 4'-tetramethoxy- flavone (1a) and
Externí odkaz:
https://doaj.org/article/c792ecdf3fd84e678271cfedd4a2a842
Autor:
Luciano R. Suzart, Juliana F. de S. Daniel, Mário G. de Carvalho, Maria Auxiliadora Coelho Kaplan
Publikováno v:
Química Nova, Vol 30, Iss 4, Pp 984-987 (2007)
This work describes the flavonoids and biflavonoids found in species of Ouratea and Luxemburgia as chemical markers that serve to detect the difference between these taxa according to the linkage between the flavonoidal units. A rational nomenclature
Externí odkaz:
https://doaj.org/article/954abc0f044644c090f0bcb4513fbbfb
Autor:
Mário G. de Carvalho, Josinete S. Alves, Emidio V. Leitão da-Cunha, José M. Barbosa-Filho, Marcelo S. da Silva
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 78, Iss 1, Pp 17-21 (2006)
Two new terpenoids, (+)-3-oxo-thermarol and 11-acetoxyeudesman-4alpha-methyl-5alpha-ol along with the (+)- thermarol were isolated from the aerial parts of Salzmmania nitida. The structures and unambiguous ¹H and 13C chemical shift assignments were
Externí odkaz:
https://doaj.org/article/92799ae7f2d449b1b1d7bd821d1521a1