Consulta: subjectFacets:"Antenna"
Registros recuperados: 5
Data/hora: 02/06/2024 06:21:22

Development of a Resonant Microwave Sensor for Sediment Density Characterization
Provedor de dados: 5
Autores: Mansour, Rassoul; Rioual, S.; Lescop, B.; Talbot, P.; Abboud, M.; Farah, W.; Tanné, G.
In this study, a sensor based on the development of a planar antenna immersed in sediments dedicated to water content monitoring in this type of material is proposed and experimentally validated. It is produced by a conventional Printed Circuit Board (PCB) manufacturing process on a double-sided metalized FR4 substrate. The sensitivity of the sensor is ensured by the variation of the real part of the complex dielectric permittivity of sediments with water content at around 1 GHz. As shown, in this frequency range, electrode polarization and Maxwell–Wagner polarization e ects become negligible, leading to only a bulk water polarization sensitivity. The sensor operates in the reflection mode by monitoring the variation of the resonant frequency as a function...
Tipo: Text
Palavras-chave: Resonant sensor; Water content; Dielectric characterization; Microwave; Antenna; Sediments.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00610/72167/70939.pdf

Sexual dimorphism in antennal receptors of Phyllophaga ravida Blanchard (Coleoptera: Scarabaeoidea: Melolonthidae)
Provedor de dados: 82
Autores: Romero-López,Angel; Morón,Miguel; Valdez,Jorge.
The external morphology of sensilla on the antennae of males and females of Phyllophaga ravida Blanchard is described using scanning electron microscopy. Sexual dimorphism in body and antennal dimensions and in antennal receptor types was found. The female's body is slightly larger than the male's, although male antennal lamellae are longer than in females. Sixteen types of sensilla were identified on the proximal and distal surfaces of lamellae from both sexes, most of them in males: three types of placodea sensilla, four types of auricilica sensilla, five types of basiconica sensilla, and four types of coeloconica sensilla. Also, two types of mechanoreceptor sensilla were present on the lamellae periphery. Furthermore, males had larger placodea,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antenna; Morphology; Sensilla; Sexual behavior.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000600018

Gynandromorphism in Periga circumstans Walker (Lepidoptera: Saturniidae)
Provedor de dados: 82
Autores: Moraes,Roberto H.P.
This note reports the occurrence of gynandromorphism in Periga circumstans Walker in Brazil. The specimen was collected in Igaratá, state of São Paulo. General aspects and photograph of the insect are presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anomaly; Moth; Wing; Antenna; Genitalia; Caterpillar.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400024

Ultrastructure of the antennal sensilla of Alabama argillacea (Hübner, 1823) (Lepidoptera: Erebidae)
Provedor de dados: 92
Autores: Santos,Andrezo Adenilton; Wanderley-Teixeira,Valéria; Cruz,Glaucilane dos Santos; Navarro,Daniela Maria do Amaral Ferraz; Alves,Luiz Carlos; Brayner,Fábio André; Teixeira,Álvaro Aguiar Coelho.
Abstract Insects have several types of sensilla, the characterization of which has been fundamental to understanding the mechanisms of sensory perception in different species. This study aimed to describe the ultrastructure of the sensilla present on the antennae of Alabama argillacea (Hübner, 1823) (Lepidoptera: Erebidae), an important pest of cotton (Gossypium hirsutum L.) crops, as well as their possible variation between sexes. To do this, the antennae of males and females of A. argillacea were analyzed using scanning electron microscopy. Sensilla morphometry was assessed using photomicrographs, from which the lengths and basal and apical diameters of sensilla were measured using the ImageJ program. Seven types of sensilla were identified on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antenna; Cotton leafworm; Morphometry; Scanning electron microscopy.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000200141

Morphology of olfactory sensilla and its role in host plant recognition by Neomegalotomus parvus (Westwood) (Heteroptera: Alydidae)
Provedor de dados: 52
Autores: Ventura,Maurício Ursi; Panizzi,Antônio Ricardo.
The external morphology of the sensilla, including pores and permeable points on the cuticle of the antennae of adults of Neomegalotomus parvus (West.) (Heteroptera: Alydidae) was investigated with regard to their olfactory function. Behavioural evidence of olfaction, the importance of the different antennal segments in locating the host under still-air, and the responses of the insects to plants' scents and to pheromones in wind assays were also studied. With the scanning electronic microscope mechanoreceptor sensilla were found on the four segments of the antennae of N. parvus. The density of the sensilla was greater on the 4th segment. On the apical segment, sensilla with olfactory morphological traits were observed. Bugs with intact antennae located...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sensilla; Host plant; Behaviour; Antenna.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500012