ABSTRACT Essential oils from the leaves of two species of the genus Ocotea that occur in the Atlantic Forest in the state of Pernambuco, Brazil, were analyzed using gas chromatography-mass spectrometry. The acaricidal activity of these oils as well as 11 selected components and blends were evaluated in f...
ABSTRACT A new modified electrode for indirect sensing of OH· and radical scavengers was described. The electrochemical polymerization of methylene blue in aqueous solutions and the properties of the resulting films on a glassy carbon electrode were carried out using cyclic voltammetry. A surface covera...
ABSTRACT This study presents the bioreduction of six β-ketoesters by whole cells of Kluyveromyces marxianus and molecular investigation of a series of 13 β-ketoesters by hologram quantitative structure-activity relationship (HQSAR) in order to relate with conversion and enantiomeric excess of &...
ABSTRACT This study aims the anatomical description and chemical characterization of aerial parts of Clusia criuva Cambess., Clusiaceae in addition to the evaluation of the antioxidant activity of crude extracts, correlated to the flavonoid content. The morphological characterization was performed using ...
Cromatografía en Capa Delgada,
Antioxidantes/aislamiento & purificación,
Antioxidantes/química,
Clusia/química,
Clusia/clasificación,
Clusia/ultraestructura,
Colorimetría,
Microscopía Electrónica de Rastreo,
Extractos Vegetales/química,
Hojas de la Planta/química,
Hojas de la Planta/ultraestructura
CARNEIRO, NÁRGELLA S;
ALVES, CASSIA C F;
ALVES, JOSÉ M;
EGEA, MARIANA B;
MARTINS, CARLOS H G;
SILVA, THAYNÁ S;
BRETANHA, LIZANDRA C;
BALLESTE, MAIRA P;
MICKE, GUSTAVO A;
SILVEIRA, EDUARDO V;
MIRANDA, MAYKER L D.
ABSTRACT Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were...
Antibacterianos/aislamiento & purificación,
Antibacterianos/farmacología,
Antioxidantes/aislamiento & purificación,
Antioxidantes/farmacología,
Eugenia/química,
Flores/química,
Cromatografía de Gases y Espectrometría de Masas,
Pruebas de Sensibilidad Microbiana,
Hojas de la Planta/química,
Prevotella/efectos de los fármacos,
Streptococcus/efectos de los fármacos
ABSTRACT The bioavailability, toxicity, and therapeutic efficacy of a drug is directly related to its administration route. The pulmonary route can be accessed by inhalation after fumigation, vaporization or nebulization. Thus, pharmacological and toxicological evaluation accessed by an apparatus specifi...
ABSTRACT Natural steroids and triterpenes such as b-sitosterol, stigmasterol, lupeol, ursolic and betulinic acids were transformed into its hexanoic and oleic esters, to evaluate the influence of chemical modification towards the cytotoxic activities against tumor cells. The derivatives were evaluated ag...
Antineoplásicos/química,
Antineoplásicos/aislamiento & purificación,
Antineoplásicos/farmacología,
Línea Celular Tumoral,
Ensayos de Selección de Medicamentos Antitumorales,
Ésteres,
Fabaceae/química,
Fabaceae/clasificación,
Concentración 50 Inhibidora,
Lamiaceae/química,
Lamiaceae/clasificación,
Triterpenos Pentacíclicos/química,
Triterpenos Pentacíclicos/aislamiento & purificación,
Triterpenos Pentacíclicos/farmacología,
Triterpenos/química,
Triterpenos/aislamiento & purificación,
Triterpenos/farmacología
ABSTRACT Corn grain yield, nitrogen (N) fertilizer efficiency and distribution to corn alone and three forms of corn and palisadegrass (Urochloa spp.) intercropping implantation was investigated. A field experiment with 15N labeling fertilizer was performed in randomized block design. No form of palisade...
ABSTRACT The aim of this study was to determine the composition and antioxidant potential of leaves of a new variety of Stevia rebaudiana (Stevia UEM-13). Stevia leaves of UEM-13 contain rebaudioside A as the main glycoside, while most wild Stevia plants contain stevioside. Furthermore can be multiplied ...
Antioxidantes/química,
Antioxidantes/aislamiento & purificación,
Glicósidos/química,
Glicósidos/aislamiento & purificación,
Fenoles/química,
Fenoles/aislamiento & purificación,
Extractos Vegetales/química,
Extractos Vegetales/aislamiento & purificación,
Hojas de la Planta/química,
Stevia/química,
Stevia/clasificación
SILVA, FERNANDO C;
RODRIGUES, VANESSA G;
DUARTE, LUCIENIR P;
LULA, IVANA S;
SINISTERRA, RUBEN D;
VIEIRA-FILHO, SIDNEY A;
RODRIGUES, RODRIGO A L;
KROON, ERNA G;
OLIVEIRA, PATRÍCIA L;
FARIAS, LUIZ M;
MAGALHÃES, PAULA P;
SILVA, GRÁCIA D F.
ABSTRACT Diarrhea is an infectious disease caused by bacterial, virus, or protozoan, and dengue is caused by virus, included among the neglected diseases in several underdeveloped and developing countries, with an urgent demand for new drugs. Considering the antidiarrheal potential of species of Maytenus...
Antibacterianos/aislamiento & purificación,
Antibacterianos/farmacología,
Antidiarreicos/aislamiento & purificación,
Antidiarreicos/farmacología,
Antivirales/aislamiento & purificación,
Antivirales/farmacología,
Línea Celular,
Virus del Dengue/efectos de los fármacos,
Maytenus/química,
Maytenus/clasificación,
Triterpenos Pentacíclicos/aislamiento & purificación,
Triterpenos Pentacíclicos/farmacología,
Extractos Vegetales/farmacología
