Results: 5034

Cytotoxicity and bacterial membrane destabilization induced by Annona squamosa L. extracts

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT This study aimed to further investigate the cytotoxicity against tumor cell lines and several bacterial strains of Annona squamosa and its mode of action. Methanol extracts of A. squamosa leaves (ASL) and seeds (ASS) were used. ASL showed significant antibacterial activity against S. aureus, K. ...

Effect of Syzygium cumini leaves on laying hens performance and egg quality

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT The aim of this study was to evaluate the effect of Syzygium cumini leaves (SCL) in laying hens diets on productive performance, egg quality and lipid oxidation of yolk. A total of 108 Hysex White laying hens were distributed in a completely randomized design with three treatments and six replic...

Potential effects of fungicide and algaecide extracts of Annona glabra L. (Annonaceae) on the microalgae Raphidocelis subcapitata and on the oomycete Pythium

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT Annona glabra L. is a semi-deciduous tree that contains several active substances, including secondary metabolites, with antifungal activity. Phytopathogenic strains of the genus Pythium cause billion dollar losses all over the world on natural and crop species. Searching for eco-friendly algaec...

Antigenotoxicity protection of Carapa guianensis oil against mitomycin C and cyclophosphamide in mouse bone marrow

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT The aim of this study was to evaluate the possible protective of C. guianensis oil against MMC and CP, which are direct- and indirect-acting chemical mutagens, using the micronucleus test. Three experiments were performed. First the C. guianensis oil was co-administered to mice at doses of 250, ...

Purification and characterization of a thermostable alkaline cellulase produced by Bacillus licheniformis 380 isolated from compost

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT During composting processes, the degradation of organic waste is accomplished and driven by a succession of microbial populations exhibiting a broad range of functional competencies. A total of 183 bacteria, isolated from a composting process, were evaluated for cellulase activity at different t...

Melipona mondury produces a geopropolis with antioxidant, antibacterial and antiproliferative activities

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT Geopropolis is a special type of propolis produced by stingless bees. Several pharmacological properties have been described for different types of geopropolis, but there have been no previous studies of the geopropolis from Melipona mondury. In this study, we investigated the antioxidant, antib...

Oxidative stress responses of juvenile tambaqui Colossoma macropomum after short-term anesthesia with benzocaine and MS-222

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT The present study aimed to evaluate the effects of benzocaine and tricaine methanesulfonate on oxidative stress parameters of juvenile tambaqui tissues. Fish (n=80) were anesthetized with benzocaine (100 mg L-1) or tricaine (240 mg L-1) and two control groups were used (non-anesthetized fish and...

In vitro antifungal activity of Myracrodruon urundeuva Allemão against human vaginal Candida species

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT Myracrodruon urundeuva is a plant native to Brazil, which is used by the indigenous population for the treatment of candidiasis. The aims of this study were to evaluate the antifungal activity of extract against human vaginal Candida species and evaluate the possible toxicological activities of ...

Evaluation in vivo of biocompatibility of differents resin-modified cements for bonding orthodontic bands

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT The focus of this study was to test the hypothesis that there would be no difference between the biocompatibility of resin-modified glass ionomer cements. Sixty male Wistar rats were selected and divided into four groups: Control Group; Crosslink Group; RMO Group and Transbond Group. The materia...

Copper II - polar amino acid complexes: toxicity to bacteria and larvae of Aedes aegypti

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT Control strategies using insecticides are sometimes ineffective due to the resistance of the insect vectors.In this scenario new products must be proposed for the control of insect vectors.The complexes L-aspartate Cu (II) and L-glutamate-Cu (II) complexes were synthesized and characterized by e...