Results: 3275

Development of a real-time PCR assay for the detection of the golden mussel ( Limnoperna fortunei, Mytilidae) in environmental samples

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT The golden mussel, Limnoperna fortunei, is among the most devastating invasive species in freshwater habitats worldwide, leading to severe environmental disturbances and economic losses. Therefore, management efforts would be greatly improved by methods that efficiently detect and quantify the a...

Vitamin E and organic selenium for broilers from 22 to 42 days old: performance and carcass traits

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT This study was conducted to evaluate the effect of vitamin E and selenium on performance, viability, productive efficiency, and yields of carcass, major cuts, and organs of broilers from 22 to 42 days submitted to cyclic-heat stress. The experimental design was randomized blocks, in a 2 × 3 fac...

Evaluation of methods for the quantification of ether extract contents in forage and cattle feces

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT The objective of this study was to compare the estimates of ether extract (EE) contents obtained by the Randall method and by the high-temperature method of the American Oil Chemist's Society (AOCS; Am 5-04) in forages (n = 20) and cattle feces (n = 15). The EE contents were quantified by using ...

Psychotria viridis: Chemical constituents from leaves and biological properties

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT The phytochemical study of hexane, chloroform and methanol extracts from leaves of Psychotria viridis resulted in the identification of: the pentacyclic triterpenes, ursolic and oleanolic acid; the steroids, 24-methylene-cycloartanol, stigmasterol and β-sitosterol; the glycosylated steroids...

Synthesis and evaluation of arylamidine derivatives for new antimicrobial and cytotoxic activities

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT A series of arylamidines 3a-j was designed, synthesized and investigated for antimicrobial activity. Structures of the compounds were confirmed by IR, 1H-NMR and 13C-NMR and a 2D spectroscopic study was performed. A preliminary screening of the antimicrobial tests clearly showed that three out o...

Beef tallow and emulsifier in growing-finishing pig diets

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Two trials were aimed to evaluate beef tallow in diets with and without emulsifier on performance of pigs at growing-finishing phases. In the first trial, 15 barrows (22.03±0.62 kg) were distributed among three treatments: reference diet; test diet 1 (5% beef tallow) and test diet 2 (10% beef t...

Reduction of the DNA damages, Hepatoprotective Effect and Antioxidant Potential of the Coconut Water, ascorbic and Caffeic Acids in Oxidative Stress Mediated by Ethanol

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Hepatic disorders such as steatosis and alcoholic steatohepatitis are common diseases that affect thousands of people around the globe. This study aims to identify the main phenol compounds using a new HPLC-ESI+-MS/MS method, to evaluate some oxidative stress parameters and the hepatoprotective ...

Growth, photosynthetic pigments and production of essential oil of long-pepper under different light conditions

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Piper hispidinervum C. DC. is popularly known as long-pepper and it owns a commercial value due to the essential oil it produces. Long-pepper oil is rich in safrole and eugenoln components that have insecticidal, fungicidal and bactericidal activity. It has been establish that to medicinal plant...

Use of GC/MS to identify chemical constituents and cytotoxic activity of the leaves of Phoradendron mucronatum and Phoradendron microphyllum (Viscaceae)

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Phoradendron mucronatum and P. microphyllum are plants that found in tropical and subtropical areas, used in traditional medicine and popularly known as mistle-thrush. The aim of this study was to identify the chemical constituents of different leaf extracts from P. mucronatum and P. microphyllu...

Prevalência da falência de múltiplos órgãos na unidade de terapia intensiva pediátrica: comparação dos escores Pediatric Risk of Mortality III e Pediatric Logistic Organ Dysfunction para predição de mortalidade

RESUMO Objetivo: Avaliar a frequência de falência de múltiplos órgãos primária e o papel da sepse como agente causal em pacientes pediátricos críticos; e calcular e avaliar a precisão dos escores Pediatric Risk of Mortality III (PRISM III) e Pediatric Logistic Organ Dysfunction (PELOD) para pre...