Sublethal Effect
Mostrando 1-12 de 174 artigos, teses e dissertações.
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1. Pode o etiltrinexapac estimular o crescimento de mudas de eucalipto?
Resumo Reguladores vegetais e herbicidas atuam e modificam diversos processos metabólicos nas plantas. A aplicação de doses subletais destes compostos pode ser utilizada de modo a modular o desenvolvimento e o crescimento das plantas, um efeito denominado hormesis. Múltiplos estudos têm relatado o efeito promotor de doses subletais de etiltrinexapac no
Ciênc. Florest.. Publicado em: 30/05/2019
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2. Lethal concentration of methyl methanesulfonate in a new potential invertebrate model for ecotoxicology
Abstract Sensitivity to different concentrations (0-200 mgL-1) of the alkylating agent methyl methanesulfonate (MMS) was evaluated in the new potential invertebrate model, the amphipod Quadrivisio lutzi (Shoemaker, 1933) after 48 h of exposure in two separate bioassays. In the first bioassay (0, 50, 100 and 200 mgL-1 MMS), all amphipods at concentrations ≥
Nauplius. Publicado em: 01/11/2018
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3. Atrazine and nicosulfuron affect the reproductive fitness of the predator Podisus nigrispinus (Hemiptera: Pentatomidae)
Abstract Herbicides can impact non-target metabolic pathways in natural enemies and lead to the reduction of these populations in the field. Behavioral characteristics, morphology and histology of reproductive structures and reproduction of females of Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) were evaluated under the effect of the herbicides atr
An. Acad. Bras. Ciênc.. Publicado em: 03/09/2018
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4. A novel expression vector for the secretion of abaecin in Bacillus subtilis
ABSTRACT This study aimed to describe a Bacillus subtilis expression system based on genetically modified B. subtilis. Abaecin, an antimicrobial peptide obtained from Apis mellifera, can enhance the effect of pore-forming peptides from other species on the inhibition of bacterial growth. For the exogenous expression, the abaecin gene was fused with a tobacco
Braz. J. Microbiol.. Publicado em: 2017-12
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5. Infectivity of housefly, Musca domestica (Diptera: Muscidae) to different entomopathogenic fungi
Abstract The housefly Musca domestica is a worldwide insect pest that acts as a vector for many pathogenic diseases in both people and animals. The present study was conducted to evaluate the virulence of different local isolates of Beauveria bassiana, Metarhizium anisopliae and Isaria fumosorosea on M. domestica using two bioassay techniques: (1) adult imme
Braz. J. Microbiol.. Publicado em: 2016-12
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6. In vitro antischistosomal activity of venom from the Egyptian snake Cerastes cerastes
Abstract INTRODUCTION: We studied the potential in vitro antischistosomal activity of Cerastes cerastes venom on adult Schistosoma mansoni worms. METHODS: Live specimens of the horned viper snake, C. cerastes were collected from the Aswan Governorate (Egypt). Venom was collected from snakes by manual milking. Worms of S. mansoni were obtained from infect
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-12
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7. Lethal and sublethal effects of essential oil of Lippia sidoides (Verbenaceae) and monoterpenes on Chagas’ disease vector Rhodnius prolixus
The aim of this study was to identify the composition of the essential oil from leaves of Lippia sidoides (EOLS), a typical shrub commonly found in the dry northeast of Brazil, popularly known as “alecrim-pimenta”. Additionally, we investigated the nymphicidal, ovicidal, phagoinhibitory and excretion effects of EOLS, its major constituent thymol and its
Mem. Inst. Oswaldo Cruz. Publicado em: 21/11/2016
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8. Histopathological effect of sub-lethal concentration of aluminum phosphide (phostoxin) on Clarias gariepinus juveniles
Abtsract: The study evaluated the effect of sub-lethal concentration of phostoxin on Clarias gariepinus juveniles. C. gariepinus juveniles belonging to the same cohort (40.1±1.2g; 18.1±1.1cm) from a commercial fish farm were randomly placed ten in each of 15 plastic tanks containing 15 liters of water. They were exposed for 96 hrs to three sub-lethal conce
Pesq. Vet. Bras.. Publicado em: 2016-07
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9. Impact of brief exposure to antifungal agents on the post-antifungal effect and hemolysin activity of oral Candida albicans
AbstractPost-antifungal effect (PAFE) of Candida and its production of hemolysin are determinants of candidal pathogenicity. Candida albicans is the foremost aetiological agent of oral candidosis, which can be treated with polyene, azole, and echinocandin antifungals. However, once administered, the intraoral concentrations of these drugs tend to be subthera
J. Appl. Oral Sci.. Publicado em: 2015-08
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10. Habituation of enterotoxigenic
Staphylococcus aureus toOriganum vulgare L. essential oil does not induce direct-tolerance and cross-tolerance to salts and organic acidsEnterotoxigenic
Staphylococcus aureus strains that were isolated from foods were investigated for their ability to develop direct-tolerance and cross-tolerance to sodium chloride (NaCl), potassium chloride (KCl), lactic acid (LA) and acetic acid (AA) after habituation in sublethal amounts (1/2 of the minimum inhibitory concentration - 1/2Braz. J. Microbiol.. Publicado em: 21/07/2015
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11. Low-level red laser therapy alters effects of ultraviolet C radiation on Escherichia coli cells
Low-level lasers are used at low power densities and doses according to clinical protocols supplied with laser devices or based on professional practice. Although use of these lasers is increasing in many countries, the molecular mechanisms involved in effects of low-level lasers, mainly on DNA, are controversial. In this study, we evaluated the effects of l
Braz J Med Biol Res. Publicado em: 10/07/2015
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12. Sublethal effect of concentrations of Metarhizium anisopliae (metsch.) sorok on the larval stage and immunologic characteristics of Diatraea flavipennella (box) (lepidoptera: crambidae)
Este trabalho teve como objetivo avaliar os efeitos de Metarhizium anisopliae, sobre Diatraea flavipennella e investigar sua resposta imune. Foi observado o efeito de M. anisopliae sobre lagartas de D. flavipennella, pulve-rizado nas concentrações de 103, 104, 105 conídios/mL, no qual apresentou diferenças com relação ao período larval, prolongando at
An. Acad. Bras. Ciênc.. Publicado em: 2014-12