Biology and Life Sciences

Biology and Life Sciences

Anatomical, Physical and Mechanical Properties of five Wood Species growing in North Darfur.

Pages: 11  ,  Volume: 29  ,  Issue: 2 , May   2019
Received: 02 Jun 2019  ,  Published: 11 June 2019
Views: 14  ,  Download: 10


# Author Name
1 Nor Eldin Adam Abdallah Mohammed
2 Elamin Elhadi Elamin


Anatomical, physical and mechanical properties were determined for five species growing in North Darfur. All anatomical properties were determined from macerated fibers. The fiber length was determined using stereological techniques on macerated fiber. The other anatomical characteristics measured included fiber length (FL), fiber diameter (FD), fiber lumen (FLD), double cell wall thickness (DCWT), rankles ratio (RR), coefficient of cell rigidity (CR), and fiber flexibility (FF). These other anatomical characteristics were measured by an electronic image analyzer in Giad Material Research Laboratory. The physical properties tested comprised density, moisture content and shrinkage. Static bending was also carried out for determining modulus of rupture (MOR) and modulus of elasticity (MOE). This, in addition to compression parallel to the grain (COM). All physical and mechanical properties were carried out according to standard procedures. The results of the analysis of variance revealed significant differences in most of the anatomical properties between species. Fiber length ranged between 2.28mm for kafour and 1.45mm for haraz. Fiber diameter, on the other hand ranged between16.75µm for sunt and 14.11 µm for haraz. Fiber lumen diameter was highest for haraz (7.832µm) and lowest for talh (6.122µm).Double call wall thickness, on the other hand, ranged between 8.95µm for sunt to 6.22µm for hraz. Runkle ratio,however, was highest for talh(1.834) and lowest for haraz (0.842).For coefficient of cell rigidity talh was highest (0.288), while haraz was the lowest (0.223). Fiber Flexibility ranged between 0.55 for haraz to 0.433 for Kafour. Modulus of Rupture ranged between 139.70 MPa for sunt and 68.74 MPa for haraz. Compression parallel to the grain, on the other hand, ranged between 68.41 MPa for sunt and 35.86 MPa for haraz. Modulus of elasticity from bending ranged from 12873.6 MPa for sunt and 6507 MPa for haraz, while modulus of elasticity from compression was highest for talh (2413.5 MPa) and lowest for haraz (1000.8 MPa).Density ranged from 0.95g/cm3 for sunt and 0.50g/cm3 for hraz. Shrinkage, however, showed no significances variation between the species.


  • Anatomical Properties; Physical Properties; Mechanical Properties; Relationship.
  • References

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