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Articles by Ali Asghar Sadeghi
Total Records ( 3 ) for Ali Asghar Sadeghi
  Naser Maheri-Sis , Mohammad Chamani , Ali Asghar Sadeghi , Ali Mirzaaghazadeh , Kambiz Nazeradl and Abolfazl Aghajanzadeh-Golshani
  This study was carried out to evaluate effects of drying and ensiling on ruminal cell wall (neutral detergent fibre; NDF) degradation of tomato pomace using in situ technique. Nylon bags filled with 5 g (on dry matter basis) of each wet, dried and ensiled tomato pomace were suspended in the rumen of three fistulated Ghezel rams for 0, 2, 4, 8, 12, 24, 48 and 72 h and obtained data were fitted to a non-linear degradation model to calculate ruminal degradation characteristics. Results showed that drying and ensiling, cause significant decrease in cell wall degradation of tomato pomace at all incubation times. Cell wall water soluble fraction (a) was decreased and potentially degradable fraction (b) was increased, while rate of degradation (c) and potential degradability (a+b) were not significantly affected by drying and ensiling of tomato pomace. Effective rumen degradability of cell wall was significantly reduced by the processing. In an overall conclusion, cell wall degradability of fresh tomato pomace was higher than that of dried and ensiled form. In other word, ensiling and drying can exert negative effects on cell wall degradation of tomato pomace in the rumen.
  Sobhan Golchin-Gelehdooni , Ali Asghar Sadeghi , Parvin Shawrang , Ali Nikkhah and Asadollah Teimouri-Yansari
  Comparative effects of extrusion cooking and conventional processing methods (cooking and autoclaving) on physicochemical properties, anti-nutritional factors and subsequent effects on digestibility [Rapidly Digestible Starch (RDS), Slowly Digestible Starch (SDS), enzyme-Resistant Starch (RS), in vitro and in vivo digestibility of starch] in broilers were investigated. Treatments had significant effect (p<0.05) on chemical compositions so that decreased moisture, starch, crude protein, ether extract and crude fiber contents. The results showed that Apparent Amylose Content (AAC) was significantly decreased (p<0.05). Treatments of seeds resulted in significant reduction of total phenols, tannins, condensed tannins, canavanine and trypsin inhibitor activity (p<0.05). Conventional and extrusion processing decreased the proportions of SDS and RS while increased the proportion of RDS (p<0.05). Treatments improved (p<0.05) in vivo digestibilities of dry matter, crude protein, true protein, starch and gross energy. Extrusion was the most effective method to reduction of anti-nutritional factors without modifying protein content. Furthermore this thermal treatment was the most effective in improving protein and starch digestibilities when compared with soaking, cooking and autoclaving.
  Sobhan Golchin-Gelehdooni , Ali Asghar Sadeghi , Parvin Shawrang , Ali Nikkhah and Asadollah Teimouri-Yansari
  V. ervilia seeds were exposed to EB-irradiation (10, 20 and 30 kGy) and physicochemical properties, anti-nutritional factors and subsequent effects on digestibility [RDS, SDS, RS, in vitro and in vivo digestibility] in broilers were investigated. Irradiation had significant effects (p<0.05) on chemical compositions so that decreased moisture, crude protein, ether extract and crude fiber contents. EB-irradiation of seeds resulted in significant dose-dependent decrease of anti-nutritional factors (total phenols, tannins, condensed tannins, canavanine and trypsin inhibitor) (p<0.05). EB-irradiation decreased the proportion of RDS and SDS of V. ervilia seeds but increased the proportions of RS. The increase in RS content indicates that the irradiation induced the structural modification besides the chain degradation. Irradiation improved (p<0.05) in vivo digestibility of dry matter, crude protein, true protein and gross energy but decreased in vitro and in vivo starch digestibility.
 
 
 
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