Buscar
Mostrando ítems 171-180 de 244
Oral administration of Costa Rican guava (Psidium friedrichsthalianum) juice induces changes in urinary excretion of energy-related compounds in Wistar rats determined by 1H NMR
(2020-08)
Introduction: Psidium friedrichsthalianum fruits have in vitro antioxidant activity and their intake has been suggested to have potential health benefits; however, there is still no evidence on the potential in vivo effect ...
Medicinal plants popularly used for gastrointestinal disorders in Costa Rican Central Valley
(2004)
Abstract : A survey was conducted of medicinal plants for gastrointestinal disorders used by inhabitants of the Central Valley in Costa Rica by means of interviews with medicinal plant vendors of the central markets of the ...
One-Pot Conversion of Aldehydes and Ketones into 1-Substituted and 1,4-Disubstituted 1,3-Enynes
(2018)
Sequential treatment of 2,3-dichloropropene with magnesium and n-BuLi generates the operational equivalent of 1,3-dilithiopropyne, which upon treatment with aldehydes or ketones, produces the corresponding alkoxy lithium ...
Gaschromatographische Analyse des Samenfettes der mittelamerikanischen Fevillea Cordifolia (Cucurbitaceae)
Gaschromatographic Analysis of the Seed Fat of the Middle American Fevillea cordifolia (Cucurbitaceae)
(1992)
The fat of the seeds of Fevillea cordifolia was extracted under exclusion of oxygen and light and then characterized by 13C-NMR in regard to the contained unsaturated acid moieties. The total fat was separated by HPLC to ...
Una nueva ruta para la sintesis de la feromona sexual de la polilla de la papa, Scrobipalpopsis solanivora
(1996)
Acetato de (E)-3-dodecenilo, principal componente de feromona de Scrobipal-popsis solanivora, se preparó con un rendimiento total del 61 %. El precursor, 3-dodecin-1-ol, se preparó en el paso de un recipiente mediante la ...
Aggregation Pheromone of the African Rhinoceros Beetle, Oryctes monoceros (Olivier) (Coleoptera: Scarabaeidae)
(1994)
Coleoptera, Oryctes monoceros, African Rhinoceros Beetle, Aggregation Pheromone, Ethyl 4-M ethyloctanoate Ethyl 4-m ethyloctanoate is a male-produced aggregation pheromone of the African rhinoceros beetle, Oryctes monoceros ...
Nota sobre la Preparación de un Dicatión Cuaternario de Azufre Divalente
(1979)
A synthesis has been developed for the previously unreported salts of S,S-di-(1-methylbenzimidazol-2-yl)-S,S-dimethylsulfonium dication [3] derived from the sulfide [2] and dimethyl-sulfate.
Synthesis and Determination of Antibacterial Activity of Jacaranone and Synthetic Analogs
(2017)
Natural product jacaranone, 1, and five more analog derivatives were synthesized and its antibacterial activity against
Gram-positive and Gram-negative microorganisms was tested. One of these derivatives, 5, ...