Vol.10, No. 1, 2002

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    A Note on the Chemical Composition of Some Browses in Eid Elferssan and Abu Naama Areas (Sudan)
    (Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2002) M.E., Elimam ; Saleh, S.A. ; Ibrahim, K.N. ; Haroon, A. ; Eltahir, F.A.
    Samples of different parts of some important browses were collected from Eid Elferssan (Southern Darfur State) and Abu Naama (Bule Nile State) and analysed for dry matter (DM), crude protein (CP), crude fibre (CF) and ash. At Eid Elferssan, all browses were good in CP (above 7.4%), and CF ranged from 12.4% to 32.1%. At Abu Naama area, differences in the composition of browses were similar to those in Eid Elferssan. The results demonstrated that browses in both areas are good sources of protein in the dry season. More research is required to assess minerals, nutritive value and antinutritional factors in these browses
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    Anot on the Compatibility of Five Home-grown Species with Portland Cement
    (Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2002) Abdelgadir, A.Y. ; Ibrahim, M. F.S.
    The objective of this study was to examine the compatibility of five home-grown wood species with ordinary portland cement by studying the compressive strength of their mixture. The tree species were Acacia nilotica, Balanites aegyptiaca,Calotropis procera, Eucalyptus camaldulensis and E. microtheca. The following cement to wood ratios were constituted and tested:- 10:1, 8:1, 6:1, 4:1 and 2:1 (weight: weight). The behaviour of cement when mixed with wood varied significantly (P= 0.0001) among the five species at all ratios, and the two Eucalyptus species had the highest compressive strength and were significantly different from the other three wood species.
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    A Note on the Chemical Mechanisms of Resistance to Field Dodder (Cuscuta campestris Yuncker) in Some Horticultural and Field Crops
    (Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2002) Farah, A.F. ; El-Hassan, G.M.
    A study was carried out to determine the mechanisms of resistance to field dodder (Cuscuta campestris Yuncker) in maize, kidney bean, garden been and hyacinth bean, which represent resistant, tolerant, susceptible and highly susceptible crops, respectively. The results indicated a rise in both phenolic acids and lignin contents with dodder infestation, except in maize – a resistant crop. The two chemicals were much higher in the tolerant crop (kidney bean) than the other three crops, indicating that both phenolic acids and lignin could play a role in stimulating defence mechanisms against field dodder parasitism, especially in tolerant crops.
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    A Note on the Effect of Cysteine or Papain Pretreatment on the Digestibility of Sorghum Flour Batter and Bread (Kisra)
    (Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2002) Elkhalifa, A.O. ; El Tinay, A.H.
    A study was carried out to find out the effect of addition of cysteine or papain to sorghum flour on the digestibility of protein and starch of Kisra. The results indicated an increase in the digestibility of both protein and starch in the three types of Kisra, i.e., control, cysteine- treated and papain-treated flour. The increase was more in the treated samples than in the traditional one. The results of the feeding experiments on rats indicated that the control Kisra had higher protein efficiency ratio than the other two.
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    A Note on Extending the Host Specificity of Bradyrhizobium japonicum and Rhizobium leguminosarum through Inter-generic Protoplast Fusion
    (Faculty of Agriculture, University of Khartoum, Shambat, Sudan, 2002) El Gaali, E. ; Kitamoto, Y.
    In an attempt to extend the rhizobial host specificity, intergeneric protast fusion between autotroplic mutants of Rhizobium leguminosarum and Bradyrhizobium japonicum, which inoculate pea and soybean, respectively, were examined. Six stable fusion products (B1-B6) were selected and tested on the two host plants. Similar to R. leguminosarum, the fusion products B3, B5 and B6 induced nodules on the roots of the pea plants. However, B6 also induced nodules on the roots of soybean plants, indicating that this fusion product exhibited an extended host specificity twards the two species. B6, also, showed a substantial increase in the nitrogenase activity in both pea and soybean.