Citrinin
Mostrando 1-12 de 35 artigos, teses e dissertações.
-
1. Electrochemical reduction of the mycotoxin citrinin at bare and modified with multi-walled carbon nanotubes glassy carbon electrodes in a non-aqueous reaction medium
O mecanismo de redução eletroquímica de citrinina em acetonitrila mais (C4H9)4NClO4 0,1 mol L-1 tanto em eletrodo de carbono vítreo (GC) não modificado quanto em eletrodo GC modificado com nanotubos de carbono de paredes múltiplas foi investigado por voltametria cíclica e eletrólise a potencial controlado. Os resultados obtidos permitiram inferir um
Journal of the Brazilian Chemical Society. Publicado em: 2012-06
-
2. Simultaneous extraction and detection of ochratoxin A and citrinin in rice
Este estudo comparou quatro procedimentos de extração para a determinação simultânea das micotoxinas citrinina e ocratoxina A em amostras de arroz. Os procedimentos de Soares e Rodriguez-Amaya, Tanaka e os métodos de extração QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) e por ultrassom foram comparados em termos de geração de resíduos
Journal of the Brazilian Chemical Society. Publicado em: 2012-01
-
3. Método QuEChERS para determinação de ocratoxina a e citrinina em arroz e farelo de arroz
The present study was carried out to establish the optimal conditions for performing ochratoxin A (OTA) and citrinin (CIT) extraction using the QuEChERS method in rice. Employing the factorial experimental design, variables that significantly influenced the extraction stages were determined. The following variables were analyzed: addition of water, acidifica
Quím. Nova. Publicado em: 2012
-
4. Citrinin derivatives from the soil filamentous fungus Penicillium sp. H9318
A investigação do extrato orgânico produzido na fermentação microbiológica de Penicillium sp. H9318 conduziu ao isolamento de um novo alcaloide isoquinolínico, o composto (5S)‑3,4,5,7-tetrametil-5,8-di-hidróxi-6(5H)-isoquinolinona (1), juntamente com quatro outros conhecidos compostos derivados da citrinina (2-5). Uma atividade inibitória signific
Journal of the Brazilian Chemical Society. Publicado em: 2011-06
-
5. Investigação das condições de crescimento e produção de metabólitos secundários das linhagens de fungos Penicillium citrinum e Penicillium oxalicum / Investigation of conditions for growth and production of secondary metabolites of fungi strains P. citrinum and P. oxalicum
In this study, two species of fungi isolated from the marine environment had their active extracts against Staphylococcus aureus and Candida albicans to a strain of P. citrinum, and activity cytotoxic and against Mycobacterium tuberculosis to a strain of P. oxalicum. This studied aims the optimization their growth conditions for the production of secondary m
Publicado em: 2010
-
6. OCHRATOXIN A AND CITRININ IN RICE: STUDY OF METHODOLOGY FOR SIMULTANEOUS DETERMINATION OF OCCURRENCE / OCRATOXINA A E CITRININA EM ARROZ: UM ESTUDO DE METODOLOGIA PARA DETERMINAÇÃO SIMULTÂNEA DE OCORRÊNCIA
Ochratoxin A and citrinin are mycotoxins found naturally in foods and feeds. The evaluation of the risk of the consumption of contemned foods for those compositions should be dear starting from reliable data that reflect the true concentration of these toxins in different foods or inputs, especially if ingested frequently. This generates the need of necessar
Publicado em: 2009
-
7. Avaliação micológica e micotoxicológica de silagens destinadas à alimentação de bovinos de fazendas no Estado de São Paulo e Rio de Janeiro. / Mycological and mycotoxicology evaluation of silage intended to a food on cattle Farms in the State of São Paulo and Rio de Janeiro.
Despite having the second largest cattle herd in the world, the Brazilian has low rates of productivity. The performance of the animals in pastures is reasonable during the rainy season, being deficient in the dry season, caused by the low availability and quality of grass, which results in weight loss of animals. Thus ensiled foods are a recently solution t
Publicado em: 2009
-
8. Effect of dissolved oxygen concentration on red pigment and citrinin production by Monascus purpureus ATCC 36928
The present study investigated the effects of agitation speed, N (200, 500, 600 or 700 rpm), and dissolved oxygen concentration, C (120, >70, 70, 60, 10 or < 10%), on red pigment and citrinin production by Monascus purpureus ATCC 36928, cultivated in liquid medium by a batch process. The gas flow rate was the same for all runs with C controlled by means of t
Brazilian Journal of Chemical Engineering. Publicado em: 2008-06
-
9. Diversidade de policetídeos produzidos por espécies de Penicillium isoladas de Melia azedarach e murraya paniculata
Eight compounds comprising four groups of polyketides, the xanthone fusarindin, the mixed peptide alkaloid-polyketide GKK1032, the anthraquinones crisophanol, citreoveridin and janthinone, and the azaphylones dihydrocitrinone, citrinin and citrinin H-1, were identified in Penicillium species isolated as endophytic fungi from Melia azedarach and Murraya panic
Química Nova. Publicado em: 2007
-
10. Herbal drugs: evaluation of the microbial contamination and presence of aflatoxins, ochratoxin A and citrinin / Drogas vegetais: avaliação da contaminação microbiana e pesquisa de aflatoxinas, ocratoxina A e citrinina
O aumento da demanda, a falta de fiscalização sanitária efetiva e de especificações adequadas para verificar a qualidade de drogas vegetais são fatores que contribuem para o acesso a produtos sem garantia da qualidade e segurança. Embora sejam consideradas seguras por sua origem natural, as drogas vegetais apresentam elevadas cargas microbianas e pode
Publicado em: 2006
-
11. Biopigments from Monascus: strains selection, citrinin production and color stability
Fungos do gênero Monascus são uma fonte promissora de corantes vermelhos naturais. No entanto, antes de se aplicar Monascus a alimentos, é importante selecionar linhagens capazes de produzir grandes quantidades de pigmentos, com o mínimo possível de citrinina. Além disso, a estabilidade de cor desses pigmentos deve ser adequadamente investigada. Com o
Brazilian Archives of Biology and Technology. Publicado em: 2005-11
-
12. Effect of citrinin and in association with aflatoxin B1 on the infectivity and proliferation of Toxoplasma gondii in vitro
Macrophages exposed to 10 mug/mL citrinin (CTR) or 0.01 mug CTR mixed with 0.04 mug aflatoxin B1 (AFB1) for a period of 2 h at 37ºC, were infected with 10(6) Toxoplasma gondii tachyzoites/muL. The parasites were treated with mycotoxins (2 h at 37ºC) before being added to the macrophage culture. The number of tachyzoites was quantified 2, 24, 48, 72 and 96
Brazilian Journal of Infectious Diseases. Publicado em: 2004-02