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Articles by Gammaa A. Osman
Total Records ( 5 ) for Gammaa A. Osman
  Amro B. Hassan , Gammaa A. Osman and Elfadil E. Babiker
  Two lupin cultivars namely Dongola and Golo were used to investigate the effect of domestic processing methods on antinutritional factors and protein and minerals availability. Processing methods were observed to reduce both tannin and phytic acid contents. However, phytic acid was greatly reduced when the seeds were soaked in distilled water compared to other processing methods. On the other hand, soaking of seeds followed by cooking or dehulling greatly reduced tannin content. Most domestic processing methods of lupin seeds were observed to improve protein digestibility and mineral availability for both cultivars. Soaking of seeds followed by dehulling of Golo cultivar was observed to increase protein digestibility to 92%, compared to the same treatment applied to Dongola cultivar (83.9%). Soaking of the seeds followed by cooking and dehulling of Dongola cultivar significantly (P = 0.05) increased iron availability to 78.2% compared to the same treatment applied to Golo cultivar (31.9%). Soaking of whole seeds significantly (P = 0.05) increased Ca and Co availability of cultivar Golo to 74.6% and 79.6%, compared to the same treatment applied to Dongola cultivar by 50% and 32.2%, respectively.
  Gammaa A. Osman , A.I. Mustafa and A.O. Abdelbagi
  Two Field experiments were carried out during the season 2002 / 2001 and 2001 / 2002 to investigate the effect of the insecticide Chlorpyrifos on cottonseed quality of Barakat-90 and Barac-67 cultivars. Three concentration levels of this insecticide were applied on field grown cotton. Oil, protein, minerals content were determined as well as the antinutritional factors content of cottonseeds. The results showed significant increase in cottonseed oil of Barakat-90 as influenced by different levels of treatments. While no significant difference was observed in Barac-67. Protein content increased significantly in cottonseeds of both cultivars. In contrast significant reduction in tannin content was observed for both cultivars, while no significant change was noticed in phytic acid for Barac-67 cultivar. Moreover the change in minerals of the cotton seeds showed no consistent pattern as influenced by different treatments.
  Amro B. Hassan , Isam A. Mohamed Ahmed , Nuha M. Osman , Mohamed M. Eltayeb , Gammaa A. Osman and Elfadil E. Babiker
  Two pearl millet cultivars namely Gadarif and Gazeera were used in this study. The effect of soaking, debranning, dry heating and germination of the grains before and after fermentation on protein content and digestibility was investigated. The effect of processing treatments on the protein content was fluctuated and varied between the cultivars. For both cultivars germination of the grains increased the protein content and digestibility (except course ground grains). For both cultivars fermentation of the germinated and course ground grains increased the protein content while fermentation of other treated grains fluctuated between the cultivars. The protein digestibility of the treated grains after fermentation was greatly improved. For both cultivars fermentation of the germinated grains gave higher protein digestibility (> 90%) compared to all other treatments.
  Gammaa A. Osman , A.I. Mustafa and A.O. Abdelbagi
  Two field experiments were carried out at the Agricultural Farm of the Faculty of Agriculture, University of Khartoum to study the effect of the insecticide Metasystox on cottonseed quality of two local cultivars, Barakat-90 and Barac-67. Three levels of concentrations of this insecticide were applied on field grown cotton. Oil, protein, phytic acid, and minerals content of cottonseeds were determined. The results showed significant increase in cottonseed oil of Barakat-90 and Barac-67, as influenced by different levels of treatments. Protein content increased significantly in cottonseeds of both cultivars. In contrast, the results of phytic acid, showed no significant difference in Barakat-90 cultivar. However, significant reduction was observed in Barac-67 cultivar. The value of mineral content of both cultivars have no consistent pattern of change.
  Gammaa A. Osman , A.I. Mustafa and A.O. Abdelbagi
  Two Field experiments were carried out during the season 2000 / 2001 and 2001 / 2002 to investigate the persistence and effect of the insecticide Malathion, on cottonseed quality of two local cultivars, Barakat-90 and Barac-67. Three concentration levels of this insecticide were applied on field grown cotton. The insecticide residue was analyzed. Oil, protein, phytic acid and mineral contents of cottonseeds were determined. No malathion residues were detected in all samples of different levels of treatments. The results also showed significant increase in cottonseed oil of Barakat-90 as influenced by different levels of treatments. While no significant difference was observed in Barac-67, in the first season. Protein content increased significantly in cottonseeds of both cultivars. No significant change was noticed in phytic acid except for Barac-67 cultivar in first season. Moreover the change in minerals of the cotton seeds showed no consistent pattern as influenced by different treatments.
 
 
 
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