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Articles by Y.A. Attia
Total Records ( 2 ) for Y.A. Attia
  A.A. El-Deek , Safa M. Hamdy , Y.A. Attia and A.M. El-Shahat
  The effect of different dietary levels of sun dried Guava by-product (GBP, pulp, peel, seeds and inedible fruits) processed by various ways in laying hen diets was investigated. GBP was collected and sun dried and fine grinded. GBP was processed by boiling for half an hr or an hr in water, acid (0.1 N) and alkaline (0.1 N) and their chemical composition was done. Furthermore, a total of 264 laying hens were fed from 32-48 wk of age twenty two diets consist of three level of GBP at 5, 10 and 15% processed by seven techniques in addition to the control diet (GBP free-diet). Each diet was assigned to three replicates of 4 hens each. Different processing methods induced an alternation in chemical composition of GBP. The ME value of GBP sun dried only, boiled for half an hr or an hr in water, acid (0.1 N) and alkaline (0.1 N) was 2200, 2040, 2540, 2310, 2160, 2650 and 2480 kcal/kg, respectively. Hens fed 15% of sun dried GBP or 15% of GBP boiled for half an hr in acid laid significantly more eggs, whereas, those fed 5% GBP boiled for half an hr in water had the least egg number. Hens fed 5% sun dried GBP boiled for an hr in alkaline had significantly the best FCR. Sun dried or processed GBP in layer diets did not adversely affect quality of eggs and shell.
  M.A. Al-Harthi , A.A. El-Deek and Y.A. Attia
  Rejected eggs were collected and dried at 55oC. Thereafter, Dried Whole Eggs (DWE) were processed by different methods e.g. freezing for 48 h at -18oC, freezing with boiling for 15 min at 100oC or autoclaving for 20 min at 120oC with a pressure of 1 kg/cm2. The DWE processed by different methods were fed to broiler chickens during 3-41 d of age at 0, 3.5 and 7.0%. Diets were fed without or with Growth Promoting Mixture (GPM) containing probiotic 0.5 g, Vit C 0.5, black pepper 0.5 g, red pepper 0.5 g/kg diet), thus there were fourteen experimental treatments. Growth was not affected by level of DWE and/or processing way, while GPM significantly increased growth. Feed intake significantly increased by autoclaving, whilst inclusion of DWE at either level significantly decreased feed intake and there was a significant interaction between DWE level and processing method for feed intake. DWE at either 3.5 or 7% significantly improved FCR similarly. Moreover, GPM supplementation improved Feed Conversion Ratio (FCR) within each level. Supplementation of GPM significantly increased absolute and relative weight of bursa, while the opposite trend was shown in thymus parameters. Abdominal fat, plasma total protein, albumin significantly decreased although plasma total lipids significantly increased due to GPM supplementation. Abdominal fat significantly decreased, and plasma total lipids significantly increased due to autoclaving, whilst freezing with boiling increased plasma cholesterol. Heart and pancreas significantly increased, however skin colour significantly decreased due to inclusion of frozen with boiled DWE. Increasing DWE level resulted in significant linear increase in heart and pancreas, whilst skin colour significantly decreased due to 3.5% DWE and GPM supplementation. Plasma cholesterol exhibited a significant linear increase with increasing DWE level.
 
 
 
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