Background: Several studies indicated that dietary organic selenium (Se) usually absorbed better than an inorganic source, with high retention and bioavailability. Dietary Se as an antioxidant element affects the immune system and hematological status in animals. Therefore, the aim of this study was to evaluate the effect of dietary supplementation of bacterial selenium as an organic source on hematology, immunity response, selenium retention, and gut morphology in broiler chickens. Results: The present results revealed that supplementation of inorganic Se was associated with the lowest level of RBC, HB, and PCV with signi cant difference than ADS18-Se. In the starter stage, both T2 and T5 were associated with the signi cantly highest IgG level compared to the basal diet, while all supplemented groups showed higher IgM levels compared to the control group. In the nisher phase, all Se supplemented groups showed signi cant (P 0.05) increases in IgG, IgA, and IgM levels compared to T1. Birds fed bacterial-Se showed high intestinal villus height and better Se retention more than sodium selenite. The organic selenium of ADS18 had a superior action in improving Se retention compared to ADS1 and ADS2 bacterial Se. Conclusion: Bacterial organic Se had a bene cial effect on the villus height of small intestine led to high Se absorption and retention. Thus, it caused a better effect of Se on hematological parameters and immunity response.
RESUMO O mamão é um fruto cuja polpa possui características sensoriais, químicas e digestivas atrativas, apresentando alta produção no país. Apesar disso, o néctar desse fruto é pouco
ResumoO objetivo do estudo foi verificar a influência da cultura starter (Lactobacillus plantarum e Staphylococcus xylosus) sobre coliformes totais e Escherichia coli e características sensoriais de salame tipo italiano. Uma formulação básica foi divida em duas porções, e a uma delas (teste) adicionou-se a cultura starter (L. plantarum -2,5 x 10 6 UFC.g -1 e S. xylosus -5,0 x 10 6 UFC.g -1 ). Monitorouse os parâmetros físico-químicos (pH, umidade e perda de massa) e microbiológicos (coliformes totais, E. coli, Salmonella spp., Listeria sp., bactérias láticas, bactérias mesófilas e bolores e leveduras). Após maturação,
Os livros didáticos são os instrumentos de ensino mais acessíveis aos professores nas escolas, sendo primordial que os conteúdos possam ser contemplados da forma mais ampla possível. O tema arqueas, merece ser pontuado nesses materiais, especialmente pelos recentes avanços tecnológicos que possibilitam o emprego de tais micro-organismos em diversas áreas. Neste sentido, foram analisadas oito obras didáticas de Biologia do Ensino Médio segundo os aspectos gerais de Coerência e Conceitos, Quantificação e Interdisciplinaridade e Contextualização das bactérias extremófilas, tendo por base o guia do Programa Nacional do Livro Didático do Ministério da Educação. Os critérios "aplicações biotecnológicas e adaptações bioquímicas" foram os que apresentam as maiores defasagens em relação à abordagem do assunto, na maioria das obras didáticas. No geral, somente uma obra teve boa avaliação em todos os aspectos analisados. Quanto ao critério "coerência entre fundamentação teórica e, imagens, textos e exercícios propostos", todas as obras apresentaram-se satisfatórias. Portanto, apesar de as discussões sobre esse tema serem de suma importância ao contexto atual, as obras apresentam deficiências técnicas, em especial no que tange às aplicações biotecnológicas.Palavras-chave: Archaea, ensino de microbiologia, procariontes extremófilos.Textbooks are the most accessible teaching tools for teachers in schools, and it is essential that the contents can be contemplated in the widest possible way. The subject archaea deserves to be punctuated in these materials, especially by the recent technological advances that allow the use of such microorganisms in several areas. In this sense, eight didactic works of Teaching Biology were analyzed according to the general aspects of Coherence and Concepts, Quantification and Interdisciplinarity and Contextualization of the extremophilic bacteria, based on the guide of the National Program of Didactic Book of the Ministry of Education. The criteria "biotechnological applications and biochemical adaptations" were the ones with the greatest lags in relation to the subject approach in most didactic works. In general, only one work had good evaluation in all aspects analyzed. As to the criterion "coherence between theoretical foundation and images, texts and proposed exercises", all works were satisfactory. Therefore, although the discussions on this subject are of the utmost importance to the current context, the works present technical deficiencies, especially in what concerns the biotechnological applications.
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