Consulta: subjectFacets:"Monoterpenes"
Registros recuperados: 8
Data/hora: 07/06/2024 02:20:57

Actividad de polvo, extractos y aceite esencial de Peumus boldus Molina solos y en mezcla con Bacillus thuringiensis Berliner contra Spodoptera frugiperda (J.E. Smith) y Helicoverpa zea (Boddie).
Provedor de dados: 32
Autores: Silva Aguayo, Gonzalo Iván.
Se evaluaron en condiciones de laboratorio e invernadero las propiedades insecticidas del polvo, aceite esencial y extracto en cloruro de metileno de Boldo (Peumus boldus Molina), además del alcaloide boldina y el terpeno 1-8-cineol (eucaliptol), solos y en combinación con Bacillus thuringiensis Berliner contra larvas de Spodoptera frugiperda (J.E. Smith) y Helicoverpa zea Boddie. Se realizaron bioensayos para evaluar mortalidad, efecto en el ciclo de vida y las preferencias alimenticias de larvas neonatas y de tercer instar e inhibición de la alimentación y oviposición. El diseño experimental fue de bloques completos al azar con 7 tratamientos y 20 repeticiones. La mayor toxicidad se manifestó con el extracto que a una concentración de 8% tuvo una...
Palavras-chave: Gusano cogollero; Gusano elotero; Monoterpenos; Insecticidas vegetales; Cry1Aa; Cry1Ac; Fall armyworm; Corn armyworm; Monoterpenes; Botanical insecticides; Doctorado; Entomología y Acarología.
Ano: 2010
URL: http://hdl.handle.net/10521/201

Actividad de polvo, extractos y aceite esencial de Peumus boldus Molina solos y en mezcla con Bacillus thuringiensis Berliner contra Spodoptera frugiperda (J.E. Smith) y Helicoverpa zea (Boddie).
Provedor de dados: 32
Autores: Silva Aguayo, Gonzalo Iván.
Se evaluaron en condiciones de laboratorio e invernadero las propiedades insecticidas del polvo, aceite esencial y extracto en cloruro de metileno de Boldo (Peumus boldus Molina), además del alcaloide boldina y el terpeno 1-8-cineol (eucaliptol), solos y en combinación con Bacillus thuringiensis Berliner contra larvas de Spodoptera frugiperda (J.E. Smith) y Helicoverpa zea Boddie. Se realizaron bioensayos para evaluar mortalidad, efecto en el ciclo de vida y las preferencias alimenticias de larvas neonatas y de tercer instar e inhibición de la alimentación y oviposición. El diseño experimental fue de bloques completos al azar con 7 tratamientos y 20 repeticiones. La mayor toxicidad se manifestó con el extracto que a una concentración de 8% tuvo una...
Palavras-chave: Gusano cogollero; Gusano elotero; Monoterpenos; Insecticidas vegetales; Cry1Aa; Cry1Ac; Fall armyworm; Corn armyworm; Monoterpenes; Botanical insecticides; Doctorado; Entomología y Acarología.
Ano: 2010
URL: http://hdl.handle.net/10521/201

Biotransformation of 1,8-cineole, the main product of Eucalyptus oils
Provedor de dados: 69
Autores: Rodríguez,Paula; Sierra,Wilson; Rodríguez,Sonia; Menéndez,Pilar.
The forest industry in Uruguay has grown considerably during the last decade. Eucalyptus plantations account for 74% of the forested land, with Eucalyptus globulus being the most widely distributed species. This industry is dedicated exclusively to the production of wood without exploiting the by-products (leaves and small branches). Eucalyptus leaves are known to contain important amounts of essential oils composed primarily of 1,8-cineole (1,3,3-trymethyl-2-oxabicyclo[2.2.2]octane). In this work, the biotransformation of 1,8-cineole, is achieved using a native bacterium (Rhodococcus sp.) which was isolated from the soil of Eucalyptus forest. A 98% of bioconversion was achieved. Three different optically pure compounds were obtained, and they were...
Tipo: Journal article
Palavras-chave: Biocatalysis; Monoterpenes; Eucalyptus; Green Chemistry.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300011

Chemical composition of four essential oils from Eupatorium spp: Biological activities toward Tribolium castaneum (Coleoptera: Tenebrionidae)
Provedor de dados: 99
Autores: Lancelle,Hugo G.; Giordano,Oscar S.; Sosa,Marta E.; Tonn,Carlos E.
Toxic and repellent properties of whole essential oils from four Eupatorium (Asteraceae) species (E. buniifolium Hook. et Arn, E. inulaefolium Kunth, E. arnottii Baker, and E. viscidum Hook. &amp;amp; Arn) were investigated in different concentrations toward Tribolium castaneum Herbst adults. The essential oils were isolated by hydrodistillation techniques from the aerial parts. The analysis was performed by GC-FID and GC-MS methods. Contact toxicity assays showed that all the evaluated essential oils were toxic. Furthermore, in all the cases mortality was dose dependent. The main repellency was observed for the essential oil recovered from E. buniifolium.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tribolium castaneum; Eupatorium; Monoterpenes; Sesquiterpenes; Essential oils; Repellency; Toxicity.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802009000200010

Sustainable production of bioactive alkaloids in Psychotria L. of southern Brazil: propagation and elicitation strategies
Provedor de dados: 39
Autores: Magedans,Yve Verônica da Silva; Rodrigues-Corrêa,Kelly Cristine da Silva; Costa,Cibele Tesser da; Matsuura,Hélio Nitta; Fett-Neto,Arthur Germano.
ABSTRACT Psychotria is the largest genus in Rubiaceae. South American species of the genus are promising sources of natural products, mostly due to bioactive monoterpene indole alkaloids they accumulate. These alkaloids can have analgesic, antimutagenic, and antioxidant activities in different experimental models, among other pharmacological properties of interest. Propagation of genotypes with relevant pharmaceutical interest is important for obtaining natural products in a sustainable and standardized fashion. Besides the clonal propagation of elite individuals, the alkaloid content of Psychotria spp. can also be increased by applying moderate stressors or stress-signaling molecules. This review explores advances in research on methods for plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Alkaloids; Elicitation; Monoterpenes; Plant propagation; Psychotria; Southern Brazil; Sustainability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000400607

Antimicrobial action of the essential oil of Lippia gracilis Schauer
Provedor de dados: 52
Autores: Albuquerque,Cynthia Cavalcanti de; Camara,Terezinha Rangel; Mariano,Rosa de Lima Ramos; Willadino,Lilia; Marcelino Júnior,Cristiano; Ulisses,Cláudia.
Antimicrobial activity of the essential oil (EO) of Lippia gracilis Schauer over fungi and heliconia endophytic bacteria was evaluated. For the fungi Geotrichum candidum; Trichoderma viride; Torula herbarum; Paecillomyces sp.; Fusicoccum sp.; P. aeruginens; Curvularia lunata; Aspergillus nidulans; A. flavus; and A. niger mycelial discs were inoculated in PDA medium with oil (0; 420; 440; 460; 480 e 500 µL L-1). The inhibition percentage in 420 µL L-1 was 100% for all fungi, except for C. lunata and A. niger, which was 95.58% and 89.40% , respectively. In other experiment, a suspension of the Salmonella choleraceuis-diarizonae, Enterobacter asburiae, Bacillus thuringiensis, B. pumilus, B. cereus, Klebsiella pneumoniae, and E. hormaechei was individually...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micropropagation; Contamination; Monoterpenes.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000500001

Study of the effects of ß-myrcene on rat fertility and general reproductive performance
Provedor de dados: 56
Autores: Paumgartten,F.J.R.; De-Carvalho,R.R.; Souza,C.A.M.; Madi,K.; Chahoud,I.
ß-Myrcene (MYR) is a monoterpene found in the oils of a variety of aromatic plants including lemongrass, verbena, hop, bay, and others. MYR and essential oils containing this terpenoid compound are used in cosmetics, household products, and as flavoring food additives. This study was undertaken to investigate the effects of MYR on fertility and general reproductive performance in the rat. MYR (0, 100, 300 and 500 mg/kg) in peanut oil was given by gavage to male Wistar rats (15 per dose group) for 91 days prior to mating and during the mating period, as well as to females (45 per dose group) continuously for 21 days before mating, during mating and pregnancy, and throughout the period of lactation up to postnatal day 21. On day 21 of pregnancy one-third of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SS-myrcene; Monoterpenes; Essential oils; Reproductive toxicity; Fertility; Embryofetal toxicity; Postnatal development.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000700012

β-Citronellol, an alcoholic monoterpene with inhibitory properties on the contractility of rat trachea
Provedor de dados: 56
Autores: Vasconcelos,T.B.; Ribeiro-Filho,H.V.; Lucetti,L.T.; Magalhães,P.J.C.
β-Citronellol is an alcoholic monoterpene found in essential oils such Cymbopogon citratus (a plant with antihypertensive properties). β-Citronellol can act against pathogenic microorganisms that affect airways and, in virtue of the popular use of β-citronellol-enriched essential oils in aromatherapy, we assessed its pharmacologic effects on the contractility of rat trachea. Contractions of isolated tracheal rings were recorded isometrically through a force transducer connected to a data-acquisition device. β-Citronellol relaxed sustained contractions induced by acetylcholine or high extracellular potassium, but half-maximal inhibitory concentrations (IC50) for K+-elicited stimuli were smaller than those for cholinergic contractions. It also inhibited...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Monoterpenes; Calcium channels; Smooth muscle; Airways.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000200605