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| Torres, Maria Camila Mejia; Pontificia Universidad Javeriana; Aponte, Adriana Sáenz; Pontificia Universidad Javeriana. |
| Heterorhabditis sp SL0708 (Rhabditida: Heterorhabditidae) is a native entomopathogenic nematode from Alcalá, Valle del Cauca (Colombia), a natural enemy of insects that can be used for controlling Plutella xylostella L, Conotrachelus psidii Marshall and Delia platura (Meigen); however its biological characterization is unknown. In order to know about the infective capacity of the isolate, tests were made with last instar larvae of Galleria mellonella (Lepidoptera: Pyrallidae) on penetration, one by one, exposure time, dose response and foraging strategy. The average infecting juveniles (IJ) entering larvae was 3 (1.5%). In the one-on-one test, larvae mortality ranged between 8.3 and 16.7%. There was no significant difference (p < 0.05) between... |
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Palavras-chave: 2.04.00.00-4 entomopathogenic nematodes; Infective juvenile; Penetration; Heterorhabditidae; Virulence Zoologia. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/16034 |
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| Sasson,Clarice Scliar; Sato,Mayumi Eliza; Beletti,Klézia da Silva; Mota,Fabrício Cunha; Piaceski,Angela Dakiw. |
| The aim of this work was to compare the skin penetration of 4-methylbenzylidene-camphor (4-MBC) in two vehicles, an oil-in-water (O/W) emulsion and an alcoholic gel. The penetration of this UVB filter through these vehicles was determined in vitro (Franz cells) using pig ear skin. The 4-MBC permeated through the skin both with the emulsion o/w as the alcoholic gel. However, with the alcoholic gel, 5 h after application of the product, the 4-MBC was found in the receptor fluid, while with the emulsion o/w, 24 h after it was detected. In both vehicles, the 4-MBC was present in the viable epidermis, dermis but most part of it, was found in the stratum corneum, being more remarkable for alcoholic gel. The right choice of the vehicle could decrease the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 4-Methylbenzylidene-camphor; Sunscreens; Penetration; Vehicles. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200006 |
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| Fonseca,Belchiolina Beatriz; Beletti,Marcelo Emílio; Melo,Roberta Torres de; Mendonça,Eliane Pereira; Coelho,Letícia Ríspoli; Nalevaiko,Priscila Christen; Rossi,Daise Aparecida. |
| This study evaluated the ability of Campylobacter jejuni to penetrate through the pores of the shells of commercial eggs and colonize the interior of these eggs, which may become a risk factor for human infection. Furthermore, this study assessed the survival and viability of the bacteria in commercial eggs. The eggs were placed in contact with wood shavings infected with C. jejuni to check the passage of the bacteria. In parallel, the bacteria were inoculated directly into the air chamber to assess the viability in the egg yolk. To determine whether the albumen and egg fertility interferes with the entry and survival of bacteria, we used varying concentrations of albumen and SPF and commercial eggs. C. jejuni was recovered in SPF eggs (fertile) after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campylobacteriosis; Commercial eggs; Penetration. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100011 |
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| Moraes,Sylvia Raquel Gomes; Tanaka,Francisco André Osama; Massola Júnior,Nelson Sidnei. |
| Anthracnose, caused by Colletotrichum gloeosporioides, produces brown lesions on guava fruits, causing severe losses on postharvest. In this study, the infection and colonization of guava fruits by C. gloeosporioides has been examined using scanning and transmission electron microscopy. Fruits at the physiologically mature stage were inoculated with a 10(5) conidia/mL spore suspension. Afterward, fruits were incubated at 25 °C in a wet chamber for periods of 6, 12, 24, 48, 96 and 120 h to allow examination of the infection and colonization process. Conidia germination and appressoria formation occurred six hours after inoculation (h.a.i). Penetration occurred directly via penetration pegs from appressoria, which penetrated the host cuticle 48 h.a.i.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Colonization; Penetration; Pre-penetration; Ultrastructure. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452013000200039 |
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