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Effect of pH and temperature on phytase and biomass production by submerged fer...
Nascimento, Júlio Cézar dos Santos; Ribeiro, Apolônio Gomes; Pessoa, Ricardo Alexandre Silva; Rabello, Carlos Bôa Viagem; Venâncio, ArmandoThe production of phytase and biomass (estimated by the ergosterol content) by submerged fermentation with Aspergillus niger var. phoenicis URM 4924 was studied. Experimental assays were carried under different conditions of pH (4.0 to 8.0) and temperature (25 to 35 ºC), and the influence of these variables on the responses was studied through a 22 central composite design and response surface methodology. Phyt...
Resident microbiota habitats and gut-balancing additives for poultry production...
Ribeiro, Apolônio Gomes; Rabello, Carlos Bôa Viagem; Santos, Marcos José Batista dos; Nascimento, Júlio Cézar dos Santos; Silva, Dayane Albuquerque daThe resident microbiota of poultry presents a great variety of commensal and/or mutualistic microorganisms, which colonize from the crop, permeating through the proventriculus, ventricle, small intestine and its portions (duodenum, jejunum, ileum) and large intestine (cecum, colon, and rectum). They act in the metabolism of nutrients in the diet, generating important metabolites for the balance of the intestina...