Ld50
Mostrando 1-12 de 562 artigos, teses e dissertações.
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1. Synthesis and Evaluation of Nematicidal Activity of Compounds Derived from Norbornadiene
Nematode is a major problem in agriculture, the effective way to control this pest is through chemical control, but the efficient molecules present in the market have great toxicity to mammals and birds. Thus, there is a constant demand for the development of new nematicide molecules. This study describes the synthesis of 21 novel esters derived from norborn
J. Braz. Chem. Soc.. Publicado em: 2020-09
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2. Bloqueio motor e sensitivo da lidocaína ou da ropivacaína peridural em cães
RESUMO Objetivou-se avaliar o bloqueio sensitivo e motor da administração peridural de 0,2mL/kg de duas concentrações de ropivacaína em comparação à lidocaína em cães. Utilizaram-se 24 cães, distribuídos em quatro grupos: NaCl a 0,9% (GS), lidocaína a 2% (GL), ropivacaína a 0,5% (GR5) e ropivacaína a 0,75% (GR7,5). Avaliaram-se a presença de
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2020-09
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3. 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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4. Effects of acetamiprid on Lipaphis pseudobrassicae (Hemiptera: Aphididae) resistant and susceptible to the parasitoid Diaeretiella rapae (Hymenoptera: Braconidae, Aphidiinae)
ABSTRACT This study evaluated the relationship between the resistance of Lipaphis pseudobrassicae to the parasitoid Diaeretialla rapae and the effects of the insecticide acetamiprid on the aphid. Four groups of L. pseudobrassicae collected in Uberlândia, MG, were used. The first two were formed by individuals of the same clone (C1), which were resistant (C1
Rev. Ceres. Publicado em: 2020-06
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5. Toxicological evaluation of Lafoensia pacari A. St.-Hil. (Lythraceae) stem bark extract: Acute and subchronic studies in mice
This study evaluated the safety of Lafoensia pacari A. St.-Hil. (Lythraceae) stem bark hydroalcoholic extract (LPE) through acute and subchronic toxicological assessments in mice. In the acute toxicity evaluation, a single 2000 mg/kg oral dose of LPE was administered to mice and clinical observations were conducted for 14 days. For subchronic toxicity, LPE d
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019
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6. Recuperação anestésica e analgesia residual da infusão continua intravenosa de fantanil, lidocaína, cetamina e fentanyl-lidocaína-cetamina associados à anesthesia total intravenosa com Propofol em cadelas submetidas à ovariossalpingo-histerectomia eletiva
RESUMO Avaliou-se a recuperação anestésica e a analgesia residual da infusão contínua (IC) de fentanil (F), lidocaína (L), cetamina (K) e fentanil-lidocaína-cetamina (FLK), associados à anestesia total intravenosa com o propofol, em cadelas submetidas à ovariossalpingo-histerectomia. Foram utilizados 32 animais pré-medicados com acepromazina, distr
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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7. Remembering a name: Neuropsychological validity studies and a computer proposal for detection of anomia
RESUMO Existem resultados contraditórios ou falta de estudos de validade relativos à função de nomeação e lateralidade cerebral. Embora a anomia seja um sintoma frequente de comprometimento da memória e o sintoma mais relevante da afasia, poucos estudos foram realizados para avaliar sua validade na detecção de pacientes com lesão no hemisfério esq
Dement. neuropsychol.. Publicado em: 09/12/2019
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8. HEPATOPROTECTIVE EFFICACY OF METHANOLIC EXTRACT OF INDIGOFERA SUFFRUTICOSA (MILL) ON PARACETAMOL-INDUCED LIVER DAMAGE IN MICE
RESUMO CONTEXTO: Indigofera suffruticosa Mill (Fabaceae) é abundante no nordeste do Brasil e popularmente utilizada no tratamento de processos infecciosos e inflamatórios. Várias propriedades biológicas, como anti-inflamatório, anticâncer, antitumoral, hepatoprotetor e baixa toxicidade, são relatadas para esta planta. OBJETIVO: Este estudo investig
Arq. Gastroenterol.. Publicado em: 07/11/2019
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9. Passive immune transfer, health, pre-weaning performance, and metabolism of dairy calves fed a colostrum supplement associated with medium-quality maternal colostrum
ABSTRACT The objective of this study was to evaluate passive immunity transfer, health, performance, and metabolism of Holstein calves fed colostrum supplement associated with medium-quality colostrum. After birth, calves were blocked according to birth weight and date and distributed into the following treatments: high-quality colostrum (> 50 mg of Ig/mL; n
R. Bras. Zootec.. Publicado em: 28/10/2019
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10. Effects of Plant Essential Oils on Vitamin C, Malondialdehyde and Some Biochemical Parameters of Rats*
ABSTRACT The aim of this study was to determine the LD30 values of the essential oils of Origanum minutiflorum He Schwarz-PH Davis (OM) and Juniperus excelca by Bieb.subsp. Excel (JE) in vivo investigation on the effects of malondialdehyde (MDA), vitamin C and some biochemical parameters. In this, study the essential oils of OM and JE plants were used. LD50
Braz. J. Poult. Sci.. Publicado em: 19/08/2019
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11. Toxicological properties of an aqueous extract of Aristolochia triangularis leaves, using the brine shrimp lethality and Allium cepa bioassays
RESUMO: O extrato aquoso de folhas de Aristolochia triangularis mostrou atividade sobre larvas de Artemia salina, com um DL50 de 370,6 µg/mL. Em experimentos com sementes de Allium cepa, o extrato provocou uma redução de 51,26% no índice de germinação, inibiu o crescimento radicular médio e foi citotóxico nas concentrações de 668 e 2.000 µg/mL. S
Cienc. Rural. Publicado em: 15/08/2019
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12. 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