This study was carried out to evaluate the effects of dietary replacement of maize with sweet potato peel in the diet of Clarias gariepinus juveniles.The levels of the SPP inclusion in the experimental diets were 0%,2...This study was carried out to evaluate the effects of dietary replacement of maize with sweet potato peel in the diet of Clarias gariepinus juveniles.The levels of the SPP inclusion in the experimental diets were 0%,25%,50%,75%and 100%.All the diets were iso-nitrogenous.One hundred and fifty(150)C.gariepinus juveniles(33 g~35 g)were randomly distributed to five treatments with three replicates each and 5%of their body weight for 12 weeks.Fish carcass proximate compositions analyzed before and after feeding with the experimental diets shows that CP and EE differed significantly(p<0.05)among the experimental fish and the control,except the percentage CP of the fish fed SPP0%and SPP50%in which there was no significant difference(p>0.05).Highest MWG of 207.70±25.95 g was obtained in the fish fed SPP100%followed by 191.30±16.15 g obtained in the fish fed SPP75%.The least MWG of 149.83±16.01 g was recorded in fish fed SPP25%.The highest FCR of 3.61±0.45 g was recorded in the fish fed SPP100%.A steady decrease in FCR was observed with decreasing inclusion levels of SPP meal.However,higher FW,FL,SGR and PER were observed in the experimental fish as from 50%inclusion levels of the SPP.The cost of feed per kg was reduced and the NP and WG increased with increasing levels of SPP and the profitability was enhanced at 100%SPP inclusion level.The results revealed that C.gariepinus juvenile could tolerate up to 50%,75%and 100%inclusion levels of SPP.The best growth performance was recorded in the fish fed SPP100%,therefore,sweet potato peel can replace maize in the diet of C.gariepinus without any inauspicious effect on the growth performance and nutrient utilization.展开更多
In the present investigation, the valorization of sweet potato (Ipomoea batatas L.) wastes into food application with health benefits was studied. Growing interest in the replacement of synthetic food antioxidants by ...In the present investigation, the valorization of sweet potato (Ipomoea batatas L.) wastes into food application with health benefits was studied. Growing interest in the replacement of synthetic food antioxidants by natural ones has fostered research on vegetable sources and screening of raw materials to identify new antioxidants. Different parts of sweet potato contain various phenolic activities. The sweet potato peel had the highest antioxidant activity as compared to other parts. It was reported that sweet potato contains bioactive compounds such as Flavonoids, Polyphenols, The present study was executed to examine the antioxidant components of sweet potato peel and their addition to fermented cow’s milk to improve lipid profile in rats fed high fat diet. Fermented milk was prepared from cow’s milk fortified with 1% and 2% of sweet potato peels (SPP), before inoculation with starter culture containing (S. thermophilus TH4, L. acidophilus La5 and L. bulgaricus). It was found that addition of SPP had no significant effects on the sensory attributes (appearance, body, texture, and flavor) as compared to the control samples. Increasing the percentage of SPP resulted in a decrease in the viscosity of the fermented milk. When SPP powder was included in the diet and fed to rats, there was a significant decrease in the activities of serum transaminases (ALT and AST). Results also showed that the fermented milk administration to hyperlipidemic/hyper-cholesterolemic rats induced a significant decrease in the total cholesterol, LDL, protein and triglycerides, and a significant increase in HDL concentration. Histopathological examination showed that groups fed with SPP blended fermented milk showed less pathological changes compared to the positive control group. The main results indicated that there is a high potential for sweet potato peel extract to be utilized as antioxidant in food systems due to its high phenolic contents. It can be concluded that the antioxidant components in purple sweet potato peel when administered with fermented cow’s milk can improve serum lipid status in rats fed high fat diet.展开更多
文摘This study was carried out to evaluate the effects of dietary replacement of maize with sweet potato peel in the diet of Clarias gariepinus juveniles.The levels of the SPP inclusion in the experimental diets were 0%,25%,50%,75%and 100%.All the diets were iso-nitrogenous.One hundred and fifty(150)C.gariepinus juveniles(33 g~35 g)were randomly distributed to five treatments with three replicates each and 5%of their body weight for 12 weeks.Fish carcass proximate compositions analyzed before and after feeding with the experimental diets shows that CP and EE differed significantly(p<0.05)among the experimental fish and the control,except the percentage CP of the fish fed SPP0%and SPP50%in which there was no significant difference(p>0.05).Highest MWG of 207.70±25.95 g was obtained in the fish fed SPP100%followed by 191.30±16.15 g obtained in the fish fed SPP75%.The least MWG of 149.83±16.01 g was recorded in fish fed SPP25%.The highest FCR of 3.61±0.45 g was recorded in the fish fed SPP100%.A steady decrease in FCR was observed with decreasing inclusion levels of SPP meal.However,higher FW,FL,SGR and PER were observed in the experimental fish as from 50%inclusion levels of the SPP.The cost of feed per kg was reduced and the NP and WG increased with increasing levels of SPP and the profitability was enhanced at 100%SPP inclusion level.The results revealed that C.gariepinus juvenile could tolerate up to 50%,75%and 100%inclusion levels of SPP.The best growth performance was recorded in the fish fed SPP100%,therefore,sweet potato peel can replace maize in the diet of C.gariepinus without any inauspicious effect on the growth performance and nutrient utilization.
文摘In the present investigation, the valorization of sweet potato (Ipomoea batatas L.) wastes into food application with health benefits was studied. Growing interest in the replacement of synthetic food antioxidants by natural ones has fostered research on vegetable sources and screening of raw materials to identify new antioxidants. Different parts of sweet potato contain various phenolic activities. The sweet potato peel had the highest antioxidant activity as compared to other parts. It was reported that sweet potato contains bioactive compounds such as Flavonoids, Polyphenols, The present study was executed to examine the antioxidant components of sweet potato peel and their addition to fermented cow’s milk to improve lipid profile in rats fed high fat diet. Fermented milk was prepared from cow’s milk fortified with 1% and 2% of sweet potato peels (SPP), before inoculation with starter culture containing (S. thermophilus TH4, L. acidophilus La5 and L. bulgaricus). It was found that addition of SPP had no significant effects on the sensory attributes (appearance, body, texture, and flavor) as compared to the control samples. Increasing the percentage of SPP resulted in a decrease in the viscosity of the fermented milk. When SPP powder was included in the diet and fed to rats, there was a significant decrease in the activities of serum transaminases (ALT and AST). Results also showed that the fermented milk administration to hyperlipidemic/hyper-cholesterolemic rats induced a significant decrease in the total cholesterol, LDL, protein and triglycerides, and a significant increase in HDL concentration. Histopathological examination showed that groups fed with SPP blended fermented milk showed less pathological changes compared to the positive control group. The main results indicated that there is a high potential for sweet potato peel extract to be utilized as antioxidant in food systems due to its high phenolic contents. It can be concluded that the antioxidant components in purple sweet potato peel when administered with fermented cow’s milk can improve serum lipid status in rats fed high fat diet.
