01887cam a2200253 a 4500003000900000005001700009008004100026040002800067041000800095100003300103245020300136246015100339260005100490300003100541502009300572520076400665530002201429653001801451653001701469653002101486700004301507700005001550856003301600EG-GiCUC20250223031136.0150201s2013    ua d   f m    000 0 eng d  aEG-GiCUCbengcEG-GiCUC0 aeng0 aSohad Fouad Said Elsharnoby 10aBiochemical Studies on Production of Humic Substances and Their Application  In Organic Farming / cSohad Fouad Said Elsharnoby ; Supervised Abdo Othman Abdelhamied , Ahmed Mohamed Ahmed Ali Dokhan 15aدراسات كيميائية حيوية على انتاج المواد الهيومية وتطبيقاتها فى الزراعة العضوية  aCairo : bSohad Fouad Said Elsharnoby , c2013  a163 P. : bcharts ; c25cm  aThesis (Ph.D.) - Cairo University - Faculty of Science - Department of Organic Chemistry  aSix different compost samples were evaluated. Marjoram compost was selected as the more humified one. Results of investigating isolation and purification procedures suggested milder methods to obtain good yield of humic acid with minimum structural alterations. Structural features studies of compost humic acid compared to more humified ones(i.e.Leonardite) and a synthetically prepared humic-like substance using a variety of wet-chemical and  spectroscopic methods, exhibit noticeable similarity and revealed that they are close to soil humic acids with slightly less aromaticity, molecular weight and functional groups content. With respect to biological activities studies they inhibited in vitro, mycelial growth of 5 from 8 phytopathogenic fungi tested  aIssued also as CD 4aFulvic acids  4aHumic acids  4aHumic substances0 aAbdo Othman Abdelhamied , eSupervisor0 aAhmed Mohamed Ahmed Ali Dokhan , eSupervisor  uhttp://172.23.153.220/th.pdf