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Articles by E. Santin
Total Records ( 2 ) for E. Santin
  E. Santin , A.C. Paulillo , L.S.O. Nakagui , A.C. Alessi , W.J.C. Polveiro and A. Maiorka
  This study aimed to evaluate the efficacy of cell wall of Saccharomyces cerevisiae (CWSC) as an inhibitor of the toxic effects of ochratoxin in broilers from 1 to 42 days of age. A total of 320 broilers was distributed into four treatments with four replicates of 20 birds each: T1 - control; T2 - 0.1% CWSC; T3 - 500 ppb of ochratoxin; T4 - 0.01% CWSC + 500 ppb of ochratoxin. The parameters evaluated were feed intake; weight gain, feed conversion; relative weights of liver, kidneys and bursa of Fabricius. Ochratoxin in diet negatively affected (P > 0.05) the feed intake and weight gain when the birds were 21 and 42 days of age, and affected the feed conversion at 42 days of age. Was no interaction between CWSC and dietary ochratoxin. The CWSC improve the feed conversion of birds exposed or not to ochratoxin at 42 days of age. The ochratoxin or CWSC in diet did not affect the relative weight of organs evaluated. These results reflect that ochratoxin in the level used in diet impaired the feed intake, weight gain and feed conversion of the birds and the CWSC did not ameliorate these parameters in the presence of the ochratoxin.
  A.V. Fischer da Silva , A. Maiorka , S.A. Borges , E. Santin , I.C. Boleli and M. Macari
  A total of 640 one-day-old male Cobb chicks were used to evaluate the effects of early feed restriction and glutamine on villi density and tip surface of enterocytes in the small intestine of broilers. A two-factor factorial experimental design with glutamine and feed restriction as main factors was used. Treatments consisted of quantitative feed restriction at 30% of ad libitum intake from 7 to 14 days of age, and glutamine addition at 1% in the diet from 1 to 28 days of age. Sections of the small intestine (duodenum, jejunum, ileum) were collected at 14 and 21 days of age for analyses by scanning and transmission electron microscopy. Villi density decreased with age and increased in cranial-caudal direction. Glutamine increased villi density in the small intestine. Microvilli density and height decreased with age. Glutamine increased microvilli width. The jejunum was the segment with the largest surface area of the tip of the enterocytes, followed by the duodenum and the ileum. Feed restriction decreased the surface area of the tip of the enterocytes in the small intestine at 14 and at 21 days of age. Glutamine supplemented in the feed increased the surface area of the tip of the enterocytes of the jejunum and ileum at 21 days of age.
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