02914cam a2200265 a 4500003000900000005001700009008004100026040002800067041000800095100003000103245016500133246007600298260004900374300004400423502009200467520184200559530002202401653002202423653001502445653002302460700005402483700003902537700003902576856003302615EG-GiCUC20250223031644.0170131s2016    ua dh  f m    000 0 eng d  aEG-GiCUCbengcEG-GiCUC0 aeng0 aAhmed Abdelmonem Abdallah10aBioconversion of Rice Straw to Ethanol / cAhmed Abdelmonem Abdallah ; Supervised Olfat Sayed Barakat , Mona Hussein Badawi , Mohamed Alla Eldin Ahmed Demerdash15aالتحول الحيوى لقش الأرز إلى إيثانول  aCairo : bAhmed Abdelmonem Abdallah , c2016  a109 P. : bcharts , facsimiles ; c25cm  aThesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Microbiology  a Egypt faces a high population growth rate nowadays, which demands for an increase in agricultural production efficiency. Consequently, agricultural field residues will increase. Rice straw is one of the main agriculture residues in  Egypt. So this study was performed on rice straw as a resource for production of  bioethanol. In a series of laboratory experiments, rice straw was pretreated with  sodium hydroxide followed by biological treatments for bioethanol production. Both Aspergillus niger NRRL-3 and Trichoderma reesei NRRL-11460 were successfully grown on either cellulose, hemicellulose or holocellulose, byproducts of rice straw hydrolysis. Appreciable amounts of some extracellular enzymes were produced in these very special cultivating media. Among tested enzymes, xylanase was produced in the highest quantity (40.54 IU ml-1), while carboxymethyl cellulase ranked second (3.35 IU ml-1). Holocellulose seemed the pioneer byproduct supporting the enzyme production followed by cellulose, while hemicellulose was the inferior in this respect. Apart from substrate and enzyme type, the fungus T. ressei overcame A. niger for the enzyme formation. The enzymatic activity of introduced inocula obviously reflected on producing sugar pools. Compared to others, T. reesei acted more actively, where the produced reducing sugars could be arranged in the descending order: 2.62 mg ml-1 (T. ressei) > 2.52 mg ml-1 (A. niger + T. ressei) > 1.10 mg ml-1(A. niger).The optimal level of reducing sugars was scored at 8th day-interval in hollocellulose -amended fungal culture medium, the respective quantities of  22.90, 20.30 and 13.22 were produced in the presence of T. reesei, mixed  inoculum and A. niger. Raising the ammonium sulphate over the recommended level in fungal culture medium significantly stimulated sugar production  aIssued also as CD 4aAspergillus niger 4aRice straw 4aTrichoderma reesei0 aMohamed Alla Eldin Ahmed Demerdash , eSupervisor0 aMona Hussein Badawi , eSupervisor0 aOlfat Sayed Barakat , eSupervisor  uhttp://172.23.153.220/th.pdf