Ld Lethal Dose
Mostrando 1-12 de 146 artigos, teses e dissertações.
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1. A New Isoflavone and Other Constituents from Roots of Clitoria guianensis
A new isoflavone named pratensein-7-O-β-D-rutinoside [(-)-7-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranosyl-5,3’-dihydroxy-4’-methoxyisoflavone] and the known compounds biochanin A-7-O-β-D-rutinoside, 6-deoxyclitoriacetal 11-O-β-D-glucopyranoside, 6-deoxyclitoriacetal, (2S)-naringenin-6-C-β-D-glucopyranoside, (2R)-naringenin-6-C-β-D-glucopyranosi
J. Braz. Chem. Soc.. Publicado em: 2020-08
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2. Characterization and application of Lippia alba (Mill) and Cymbopogon citratus D.C. Stapf. essential oils as natural sanitizers in coriander
Abstract Essential oils (EOs) are a promising alternative for food preservation and can be used instead of synthetic antimicrobial compounds such as sanitizers, as long as they are efficient and safe. In view of this possibility of use, Lippia alba (Mill) (LAEO) and Cymbopogon citratus D.C. Stapf. (CCEO) essential oils were evaluated as natural antimicrobial
Food Sci. Technol. Publicado em: 02/05/2019
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3. Essential oil of Pterodon polygalaeflorus Benth attenuates nociception in mice
Essential oils (EO) are volatile liquids responsible for the aroma of plants. Pterodon polygalaeflorus seeds have received widespread use in folk medicine for the treatment of inflammatory diseases. For this reason and because Pterodon polygalaeflorus seeds have great EO content, which is frequently pharmacologically active, the present study aimed to evalua
Braz J Med Biol Res. Publicado em: 04/10/2018
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4. Toxicity and motor changes in Africanized honey bees (Apis mellifera L.) exposed to fipronil and imidacloprid
ABSTRACT This study evaluated the in vitro toxicity and motor activity changes in African-derived adult honey bees (Apis mellifera L.) exposed to lethal or sublethal doses of the insecticides fipronil and imidacloprid. Mortality of bees was assessed to determine the ingestion and contact lethal dose for 24 h using probit analysis. Motor activities in bees ex
An. Acad. Bras. Ciênc.. Publicado em: 2018-03
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5. Preparation and neutralization efficacy of IgY antibodies raised against Deinagkistrodon acutus venom
Abstract Background The five-paced pit viper (Deinagkistrodon acutus), endemic to China and northern Vietnam, is responsible for most snakebites in the Chinese territory. Antivenom produced from horses is the main treatment for snakebites, but it may cause numerous clinical side effects and have other disadvantages involved in their production such as the
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 06/07/2017
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6. CONSTITUINTES QUÍMICOS E ATIVIDADE FITOTÓXICA DAS FOLHAS DE
Annona nutans The phytochemical investigation and evaluation of the phytotoxic effect of the extract and fractions obtained from the leaves of
Annona nutans (R. E. Fr.) R. E. Fr. were performed. Phytotoxic activity was assessed on radicle and hypocotyl ofAllium cepa andLactuca sativa , where chloroform and ethyl acetatQuím. Nova. Publicado em: 2015-06
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7. Potential Insecticidal Activity of Steroidal C-17 Pyrazolinyl Derivatives
Agrochemical research, over the last two decades, has resulted in the discovery of chemically novel insecticides, of which steroids-based compounds that mimic the action of hormones have been considered as safe insecticides. In this study, eight steroidal C-17 pyrazolinyl derivatives were resynthesized through molecular hybridization and their insecticidal a
J. Braz. Chem. Soc.. Publicado em: 2015-02
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8. Characterization of a virulent Leptospira interrogans strain isolated from an abandoned swimming pool
Pathogenic Leptospira spp. are the etiological agents of leptospirosis, an important disease of both humans and animals. In urban settings, L. interrogans serovars are the predominant cause of disease in humans. The purpose of this study was to characterize a novel Leptospira isolate recovered from an abandoned swimming pool. Molecular characterization throu
Braz. J. Microbiol.. Publicado em: 14/05/2013
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9. Toxicity of non-pyrethroid insecticides against Triatoma infestans (Hemiptera: Reduviidae)
Triatoma infestans (Klug) is the main vector of Chagas disease, which is a public health concern in most Latin American countries. The prevention of Chagas disease is based on the chemical control of the vector using pyrethroid insecticides. In the last decade, different levels of deltamethrin resistance have been detected in certain areas of Argentina and B
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-08
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10. Laboratory and field evaluation of the effects of the neonicotinoid imidacloprid on the oviposition response of Aedes (Stegomyia) aegypti Linnaeus (Diptera: Culicidae)
In this paper, we assessed the suitability of using the neonicotinoid imidacloprid with standard ovitraps by evaluating the ovicidal properties of imidacloprid and its influence on the oviposition response of gravid females of Aedes (Stegomyia) aegypti Linnaeus (Diptera: Culicidae). First, we calculated the imidacloprid lethal dose 99 (LD99) by exposing thir
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-12
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11. The toxicity evaluation of Syzygium cumini leaves in rodents
This study aimed to evaluate the safety of the hydroalcoholic extract (HE) of Syzygium cumini (L.) Skeels, Myrtaceae, leaves in rodents. Acute toxicity was evaluated through the determination of a LD50 in mice and rats (up to 14 days). In mice, the oral administration (p.o.) of the HE (0.1 at 6 g/kg) did not cause any death. When administered by intraperiton
Revista Brasileira de Farmacognosia. Publicado em: 30/09/2011
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12. Evaluation of acute toxicity of babassu mesocarp in mice
The safety of babassu mesocarp (Orbignya phalerata Mart., Arecaceae), which exhibited anti-inflammatory and antithrombotic activities, was evaluated by determining the potential acute toxicity in mice. A lyophilized ethanol extract of babassu mesocarp (BME) was administered to C3H/HePas mice (10/group) in a single dose of 1000, 3000 and 5000 mg/kg, by gavage
Revista Brasileira de Farmacognosia. Publicado em: 08/07/2011