Peritrophic Membrane
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Estudo morfológico e histoquímico do intestino médio de larvas de Anticarsia gemmatalis (Hübner 1818) (Lepidoptera: noctuidae) suscetíveis e resistentes ao AgMNPV alimentadas com genótipos de plantas resistentes a insetos
The velvetbean caterpillar, Anticarsia gemmatalis (Lepidoptera: Noctuidae) is a pest of soybean. To control this insect have been employed as technical biological control by nucleopolyedrovirus (AgMNPV) and the resistance of plants with cultivars that have a complex of chemicals (flavonoids), wich can make them toxic to insects. The midgut is considered the
Publicado em: 2010
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2. Determinação de motivos de ligação à quitina em vicilinas de Canavalia ensiformis e Vigna unguiculata através de métodos in silico e relação com suas toxicidades para o bruquídeo Callosobruchus maculatus (Coleoptera:Bruchidae)
Chitin is an important structural component of the cellular wall of fungi and exoskeleton of many invertebrate plagues, such as insects and nematodes. In digestory systems of insects it forms a named matrix of peritrophic membrane. One of the most studied interaction models protein-carbohydrate is the model that involves chitin-binding proteins. Among the in
Publicado em: 2009
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3. Peritrophic membrane origin ultramorfology and ultra structural analysis in bees (Hymenoptera) / Ultra-morfologia e análise ultraestrutural sobre a origem da membrana peritrófica em abelhas (Hymenoptera)
Two experiments were carried out about bees peritophic membrane (PM). This not cellule structure, quitine fibril composed, glicosaminoglicanes and protein, to cover midgut inner. The first experiment was carried out through scanning microscopy and had to objective describe ecto and endoperitrophic spaces characteristics in solitary and eusocial bees. Adults
Publicado em: 2008
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4. Avaliação da ação bioinseticida de SBTI e vicilina de Erythrina velutina em enzimas digestivas e membrana peritrófica de larvas de Plodia interpunctella (Lepidoptera: Pyralidae)
Plodia interpunctella (Indian meal moth) is a cosmopolitan pest that attacks not only a wide range of stored grain as well other food products. Due to its economic importance several researches have focused in a method with ability to control this pest with few or no damage to the environment. The study of digestive enzymes inhibitors, lectins and chitin-bin
Publicado em: 2007
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5. Metamorphosis in the midgut of bees : proliferation or cellular migration? / Metamorfose do intestino medio de abelhas : proliferação ou migração celular?
Bees are holometabolus insects, since they present complete metamorphosis. During the metamorphosis of the insects the gut is completely remodeled. Few studies emphasize aspects of the renewal of the epithelium of bees midgut during metamorphosis. Studies that describe digestive cell proliferation are lacking in images of mitosis. This research is a contri
Publicado em: 2007
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6. Study of the insecticide and pro-inflammatory activity of lectin isolated from annona coriacea mart seeds / Estudo da atividade inseticida e pro-inflamatoria da lectina isolada de sementes de Annona coriacea Mart
Lectins are a group of proteins and/or glycoproteins, which exhibit specific and reversible carbohydrate-binding activities. Studies have demonstrated that such proteins possess important biological activities including insecticide activity as well as immunological and physiological responses in animals. In this investigation, our aim was to compare the effe
Publicado em: 2006
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7. Synthesis, degradation and functions of insect peritrophic membrane / Síntese, degradação e funções da membrana peritrófica dos insetos
A maior parte dos insetos possui uma estrutura anatômica em forma de filme (membrana peritrófica, MP) composta de quitina e proteínas (peritrofinas), que separa o alimento do epitélio do intestino médio. A MP protege o epitélio de microorganismos e da abrasão, e possui outras funções baseadas no fato de que a MP promove a compartimentalização de e
Publicado em: 2005
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8. In vivo binding of the Cry11Bb toxin of Bacillus thuringiensis subsp. medellin to the midgut of mosquito larvae (Diptera: Culicidae)
Bacillus thuringiensis subsp. medellin produces numerous proteins among which 94 kDa known as Cry11Bb, has mosquitocidal activity. The mode of action of the Cry11 proteins has been described as similar to those of the Cry1 toxins, nevertheless, the mechanism of action is still not clear. In this study we investigated the in vivo binding of the Cry11Bb toxin
Memórias do Instituto Oswaldo Cruz. Publicado em: 2004-02
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9. Malaria parasite chitinase and penetration of the mosquito peritrophic membrane.
Malaria parasites (ookinetes) appear to digest the peritrophic membrane in the mosquito midgut during penetration. Previous studies demonstrated that lectins specific for N-acetylglucosamine bind to the peritrophic membrane and proposed that the membrane contains chitin [Rudin, W. & Hecker, H. (1989) Parasitol. Res. 75, 268-279]. In the present study, we sho
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10. Antibody-mediated inhibition of the growth of larvae from an insect causing cutaneous myiasis in a mammalian host
Many insects feed on blood or tissue from mammalian hosts. One potential strategy for the control of these insects is to vaccinate the host with antigens derived from the insect. The larvae of the fly Lucilia cuprina feed on ovine tissue and tissue fluids causing a cutaneous myiasis associated with considerable host morbidity and mortality. A candidate vacci
The National Academy of Sciences of the USA.
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11. An intestinal mucin is the target substrate for a baculovirus enhancin
An invertebrate intestinal mucin (IIM) was identified from a lepidopterous insect, Trichoplusia ni. The IIM is a major protein constituent of the peritrophic membrane that facilitates the digestive process, as well as protecting invertebrate digestive tracts from microbial infections. The IIM demonstrated biochemical characteristics similar to vertebrate muc
The National Academy of Sciences of the USA.
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12. Pathway of Infection of Mosquito Iridescent Virus: I. Preliminary Observations on the Fate of Ingested Virus
Mosquito iridescent virus (MIV) is ingested in large amounts by first- and second-instar Aedes taeniorhynchus larvae without causing a high rate of infection. Electron microscope studies have been undertaken to determine the fate of ingested virus. Preliminary observations suggest that most, if not all, ingested particles are degraded shortly after entering