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Articles by J.J. Wang
Total Records ( 2 ) for J.J. Wang
  C.J. Cai , B. Thaler , D.W. Liu , J.J. Wang and S.Y. Qiao
  This research is to optimize preparation of L. fermentum and its survival rate by method of microcapsulation using a spray drying technique. After spray drying, the effect of protective agents and spray drying characteristics on the survival rate were studied after which the survival change over storage time was determined. Researchers concluded that the number of surviving encapsulated L. fermentum was 2.20x109 CFU g-1 after spray drying when the wall materials were 20% skim milk power and the initial concentration of L. fermentum (2.60x109 CFU mL-1). When the air temperature at the inlet was 130°C, the survival rate was not affected by the outlet air temperature and the bacteria survival rate was improved from 14.63-29.13% by increasing drying air volume. It was found that all kinds of carbohydrates have a beneficial effect on the survival rate and the bacteria survival rate reached 60.44% when lactose was added. After 30 days of storage at 4 and 20°C, the survival rates were >20% and <5%, respectively. The results suggest the possibility of achieving a good formulation system for L. fermentum with a high number of viable cells to be used for the industrial development of probiotics for livestock.
  Y.N. Min , H.L. Li , L. Li , Z.Y. Niu , J.J. Wang , S.K. Liu , J. Zhang and F.Z. Liu
  This experiment was conducted to evaluate the effects of dietary DDGS levels on small intestinal morphology of broilers. A total of 720 Cobb 48 male broilers were used in this experiment. Birds were fed diets formulated to contain 0, 5, 10, 15, 20 and 25% DDGS, respectively for a period of 6 week. On day 21 and 42, significant differences were observed in Villus Height (VH), Crypt Depth (CD) and the ratio of villus height to crypt depth (VCR) in duodenum, jejunum and ileum except for ileum on day 42. About 10-15% DDGS inclusion level showed better VH, CD and VCR for broiler intestinal morphology. Therefore, dietary added with DDGS can improve intestinal morphology, up till to 15% DDGS concentrations were considered to be suitable for broiler starter and grower age.
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