Results: 5032

Cytotoxicity of Cheese and Cheddar Cheese food flavorings on Allim cepa L root meristems

Braz. j. biol; 76 (2), 2016
Abstract Despite their great importance for the food industry, flavorings, in general, raise a number of questions regarding their cytotoxicity, mutagenicity and carcinogenicity, since, in the literature, there are few studies found evaluating the toxicity on the systemic and cellular level, of these che...

Phytotoxic potential of young leaves from Blepharocalyx salicifolius (Kunth) O. Berg (Myrtaceae)

Braz. j. biol; 76 (2), 2016
Abstract The loss of leaves by plant species found in the Cerrado (Brazilian savanna) is an energetically expensive process due to adverse environmental conditions and predation by herbivory. The mature leaves have adaptations which minimize these events. However, the young individuals lack these structu...

The effect of visitor number and spice provisioning in pacing expression by jaguars evaluated through a case study

Braz. j. biol; 76 (2), 2016
Abstract Captive animals exhibit stereotypic pacing in response to multiple causes, including the inability to escape from human contact. Environmental enrichment techniques can minimize pacing expression. By using an individual-based approach, we addressed whether the amount of time two males and a fema...

Antioxidant potential of yerba mate (Ilex paraguariensis St. Hil.) extracts in Saccharomyces cerevisae deficient in oxidant defense genes

Braz. j. biol; 76 (2), 2016
Abstract Yerba-mate (Ilex paraguariensis St. Hil) is mainly consumed as “chimarrão”, a hot drink highly appreciated in Brazil, Argentina, Paraguay and Uruguay. This study evaluated the antioxidant potential of aqueous extracts of I. paraguariensis precipitated with ethanol. The leaves were p...

Effect of plant extracts and a disinfectant on biological parameters and pathogenicity of the fungus Beauveria bassiana (Bals.) Vuill. (Ascomycota: Cordycipitaceae)

Braz. j. biol; 76 (2), 2016
Abstract The fungus Beauveria bassiana is naturally found in poultry houses and causes high rates of mortality in Alphitobius diaperinus. Laboratory and field experiments have shown the potential of this fungus as an insect control agent. However, in poultry houses, bacteria as Salmonella, can be found a...

Antimitotic and antimutagenic action of the Hymenaea stigonocarpa bark on dividing cells

Braz. j. biol; 76 (2), 2016
Abstract The objective of this study was to evaluate the action of Hymenaea stigonocarpa bark hydroalcoholic extract against a mutagenic compound using A. cepa meristematic root cells as a test system. The treatment groups were: Negative Control (NC) – distilled water; Positive Control (PC) –...

Occurrence and antimicrobial resistance patterns of Listeria monocytogenes isolated from vegetables

Braz. j. microbiol; 47 (2), 2016
Abstract Although the consumption of fresh and minimally processed vegetables is considered healthy, outbreaks related to the contamination of these products are frequently reported. Among the food-borne pathogens that contaminate vegetables is Listeria monocytogenes, a ubiquitous organism that exhibits ...

Susceptibility and molecular characterization of Candida species from patients with vulvovaginitis

Braz. j. microbiol; 47 (2), 2016
Abstract Vulvovaginal candidiasis affects women of reproductive age, which represents approximately 15–25% of vaginitis cases. The present study aimed to isolate and characterize yeast from the patients irrespective of the presentation of clinical symptoms. The isolates were subjected to in vitro s...

Candida glabrata among Candida spp. from environmental health practitioners of a Brazilian Hospital

Braz. j. microbiol; 47 (2), 2016
Abstract The incidence of the species Candida albicans and non-albicans Candida was evaluated in a Brazilian Tertiary Hospital from the environment and health practitioners. In a 12-month period we had a total positivity of 19.65% of Candida spp. The most recurring non-albicans Candida species was C. gla...

Membrane permeabilization of colistin toward pan-drug resistant Gram-negative isolates

Braz. j. microbiol; 47 (2), 2016
Abstract Pan-drug resistant Gram-negative bacteria, being resistant to most available antibiotics, represent a huge threat to the medical community. Colistin is considered the last therapeutic option for patients in hospital settings. Thus, we were concerned in this study to demonstrate the membrane perm...