Results 11 to 20 of about 237 (117)

Use of chemometric and quantum-mechanical methods in the analysis of bioactive terpenoids and phenylpropanoids against the Aedes aegypti

open access: yesOrbital: The Electronic Journal of Chemistry, 2010
Dengue fever is one of the main public health problems in the world. Many mosquitoes have developed resistance to the conventional insecticides used. Thus, the search for vegetable extracts and natural substances as alternative insecticides has increased.
Reginaldo Bezerra dos Santos   +4 more
doaj   +1 more source

Alelopatia de extratos aquosos de canela-sassafrás (Ocotea odorifera (Vell.) Rohwer) Allelopathy of Brazilian sassafras (Ocotea odorifera (Vell.) Rohwer) aqueous extracts

open access: yesActa Botânica Brasílica, 2007
Estudos de alelopatia investigam os efeitos positivos e negativos que metabólitos secundários de plantas, microrganismos ou fungos exercem sobre o desenvolvimento de indivíduos vizinhos. Nesse trabalho foram investigados os efeitos de extratos aquosos de
Flávia Maria da Silva Carmo   +2 more
doaj   +1 more source

Aprovechamiento de los residuos del fruto de Passiflora tripartita

open access: yesScientia Agropecuaria, 2021
Las semillas y cáscara del fruto de Passiflora tripartita, poseen compuestos de gran importancia que podrían ser aprovechados por la agroindustria, industria farmacéutica y medicina.
Diana Rojas Romaní   +2 more
doaj   +1 more source

Terpenos e ácidos graxos de Dipteryx lacunifera Ducke [PDF]

open access: yesQuímica Nova, 2007
This paper describes the isolation of the furanocassane-type diterpene, named vinhaticoic acid, along with b-farnesene and spatulenol from fruit shells of D. lacunifera. Structural determinations were accomplished by chemical derivatization and spectral analysis, including 1D and 2D NMR and X-ray crystallography.
Vieira Júnior, Gerardo Magela   +4 more
openaire   +3 more sources

Terpenos isolados de Coussarea platyphylla Müll. Arg. (Rubiaceae) [PDF]

open access: yesQuímica Nova, 2009
The phytochemical investigation of Coussarea platyphylla led to the isolation of triterpenes betulonic and betulinic acid, monoterpenes monotropein and monotropein salt, the diterpene trans-phytol and esteroids. The structures of the isolated compounds were assigned on the basis of spectroscopic data, including two-dimensional NMR methods.
Araujo, Francieli Casassa Vieira de   +6 more
openaire   +3 more sources

TERPENOS E OUTROS COMPOSTOS DERIVADOS PRESENTES EM QUEIJOS

open access: yesAnais do I Congresso Brasileiro de Biotecnologia Vegetal On-line, 2021
Introdução: O queijo é um rico produto alimentício que possuí diferentes voláteis em sua composição incluindo terpenóides. Visto a diversidade de produtos e de tipos desse alimento, a pesquisa buscou na literatura, artigos que utilizaram a Microextração em Fase Sólida acoplado a Cromatografia Gasosa (SPME-GC/MS) de queijos do tipo Minas Padrão, Minas ...
Matheus Alex Araújo Resende   +1 more
openaire   +1 more source

ANÁLISIS TÉRMICO, HIDROFORMILACIÓN DE CANFENO E HIDROGENACIÓN DE LIMONENO CON COMPLEJOS TRIFENILFOSFINA-RUTENIO(II) CONTENIENDO LIGANDOS N-HETEROCÍCLICOS

open access: yesRevista de Investigaciones Universidad del Quindío, 2010
En este trabajo reportamos los estudios térmicos de termogravimetría (TGA) y la actividad catalítica en la hidroformilación en fase homogénea de canfeno utilizando complejos del tipo [RuCl (PPh ) (N-het)], donde los N-heterocíclicos son: 2-acetilpiridina
Fernando Cuenú-Cabezas   +2 more
doaj   +1 more source

Carga de parásitos internos del ganado bovino en ambientes con alta diversidad de plantas

open access: yesAIA Avances en Investigación Agropecuaria, 2021
El contenido de compuestos fenólicos de las plantas forrajeras está asociado positivamente a bajas cargas parasitarias en el ganado (Provenza y Villalba, 2010). Diversas plantas que contienen compuestos como terpenos, alcaloides, saponinas, antraquinonas
Daheli Anahi Ocelot-Alvarado   +4 more
doaj   +1 more source

Phytochemical prospection and biological activity of Duroia macrophylla (Rubiaceae) [PDF]

open access: yesJournal of Pharmacy & Pharmacognosy Research, 2014
Context: Duroia macrophylla (Rubiaceae) is endemic from the Amazon Rainforest. Aims: To perform phytochemical profile of Duroia macrophylla extracts and to evaluate them as antioxidant, insecticidal and cytotoxic.
Daiane Martins   +6 more
doaj  

Glandular trichome density and essential oil composition in leaves and inflorescences of Lippia origanoides Kunth (Verbenaceae) in the Brazilian Cerrado

open access: yesAnais da Academia Brasileira de Ciências, 2015
The essential oils from leaves and inflorescences of Lippia origanoides Kunth present aromatic and medicinal potential and have been used to treat several diseases, including melanoma. In Brazil, L.
Luiz R.S. Tozin   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy