Consulta: creatorFacets:"Barbosa,Luiz Cláudio de Almeida"
Registros recuperados: 4
Data/hora: 02/06/2024 00:56:29

Composição e fungitoxicidade do óleo essencial de capim citronela em função da adubação orgânica
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Veloso,Ronice Alves; Castro,Henrique Guilhon de; Cardoso,Dione Pereira; Santos,Gil Rodrigues dos; Barbosa,Luiz Cláudio de Almeida; Silva,Kamilla Pires da.
O objetivo deste trabalho foi avaliar a influência da adubação orgânica sobre o teor e a composição do óleo essencial de capim citronela (Cymbopogon nardus), bem como a fungitoxicidade desse óleo ao crescimento micelial dos fungos Didymella bryoniae, Colletotrichum gloeosporioides e Amphobotrys ricini. A extração do óleo essencial foi realizada por hidrodestilação, a partir de plantas cultivadas em quatro doses de adubação orgânica (0, 3, 6 e 9 kg de esterco bovino curtido por cova), e a identificação dos constituintes químicos foi conduzida por cromatografia gasosa/espectrometria de massas. Para avaliar a inibição do crescimento micelial, o experimento foi instalado no delineamento inteiramente casualizado, em arranjo fatorial. Foram testadas sete...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cymbopogon nardus; Bioatividade; Óleo essencial; Plantas medicinais.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001200005

Plant compounds insecticide activity against Coleoptera pests of stored products
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Moreira,Márcio Dionizio; Picanço,Marcelo Coutinho; Barbosa,Luiz Cláudio de Almeida; Guedes,Raul Narciso Carvalho; Campos,Mateus Ribeiro de; Silva,Gerson Adriano; Martins,Júlio Cláudio.
The objective of this work was to screen plants with insecticide activity, in order to isolate, identify and assess the bioactivity of insecticide compounds present in these plants, against Coleoptera pests of stored products: Oryzaephilus surinamensis L. (Silvanidae), Rhyzopertha dominica F. (Bostrichidae) and Sitophilus zeamais Mots. (Curculionidae). The plant species used were: basil (Ocimum selloi Benth.), rue (Ruta graveolens L.), lion's ear (Leonotis nepetifolia (L.) R.Br.), jimson weed (Datura stramonium L.), baleeira herb (Cordia verbenacea L.), mint (Mentha piperita L.), wild balsam apple (Mormodica charantia L.), and billy goat weed or mentrasto (Ageratum conyzoides L.). The insecticide activity of hexane and ethanol extracts from those plants on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural insecticide; Pest management; Alternative control; Secondary metabolites.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000700001

Discrimination between workers of Acromyrmex subterraneus molestans from monogynous and polygynous colonies
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Souza,Danival José de; Lucia,Terezinha Maria Castro Della; Barbosa,Luiz Cláudio de Almeida.
Behavioral assays were conducted with individuals from monogynous and polygynous colonies of Acromyrmex subterraneus molestans to evaluate the discriminatory ability of ant workers. These bioassays showed that this subspecies could not discriminate among non-nestmates or nestmate workers. However, nestmates of these same colonies did discriminate among workers of another subspecies Ac. subterraneus subterraneus. When discrimation occurred there were no differences in the response of workers from either monogynous or polygynous colonies. Similarities or differences in the chemical profile of both subspecies explained the absence or occurence of aggressiveness among workers. The chemical profile of colonies of the same subspecies was very similar among them,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf-cutting ants; Nestmate discrimination; Polygyny.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300013

Harvest time on the content and chemical composition of essential oil from leaves of guava
Provedor de dados: Ciência Rural
Autores: Silva,Elizabeth Aparecida Josefi da; Silva,Vanessa Paula da; Alves,Cassia Cristina Fernandes; Alves,José Milton; Souchie,Edson Luiz; Barbosa,Luiz Cláudio de Almeida.
ABSTRACT: The essential oil plants contents can be affected by several factors. For example, in certain plants, collection time has been observed to affect the content and chemical composition of the essential oil obtained from the plant. The objective of this study was to evaluate the effect of collection time on the content and chemical composition of the essential oil from guava ( Psidium guajava L.) leaves. Leaves were collected at different times of the day and the content and chemical composition of their essential oil was determined. Collection time did not qualitatively affect the chemical composition of the essential oil. However, concentration of certain substances in the oil, such as α-humulene and trans-caryophyllene, did significantly vary at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava L.; Medicinal plants; Special metabolites; Α-humulene; Trans-caryophyllene; Guava.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001771