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Characteristics of the kenaf fibers |
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U.M. |
LINDEEN TREE |
CORE |
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| A. ELEMENTARY FIBRES |
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| length |
mm |
2,6-4 |
0,5-1 |
| width |
µ |
18-24 |
22-29 |
| thickness, lumen |
µ |
7,3 |
0,8 |
| thickness, walls |
µ |
0,6-0,8 |
2,9 |
| B. SUGAR CONTENT |
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| Lignin (*) |
% |
20,1 |
18,7 |
| Cellulose |
% |
44,4 |
37,6 |
| Glucose |
% |
44,2 |
44 |
| Xylose |
% |
17,7 |
23 |
| Galactose |
% |
1,4 |
0,8 |
| Arabinose |
% |
10,9 |
1,2 |
| Mannose |
% |
1,4 |
1,2 |
| Extractors |
% |
2,7 |
1,9 |
| Ash |
% |
4,6 |
2,2 |
| Acetylated |
% |
2,7 |
4 |
| C. MINERAL CONTENT |
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| P |
% |
0,04 |
0,05 |
| K |
% |
0,56 |
0,38 |
| Ca |
% |
0,5 |
0,28 |
| Mg |
% |
0,21 |
0,1 |
| S |
% |
0,1 |
0,6 |
| Zn |
ppm |
7,04 |
9,86 |
| B |
ppm |
15,11 |
8,67 |
| Mn |
ppm |
24,15 |
11,76 |
| Fe |
ppm |
511,2 |
92,46 |
| Cu |
ppm |
< 2,46 |
< 2,46 |
| Al |
ppm |
475,5 |
71,17 |
| Na |
ppm |
806,7 |
690,2 |
| D. METAL CONTENT |
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| Cd |
ppm |
0,25 |
0,078 |
| Cr |
ppm |
29,25 |
< 12,8 |
| Cu |
ppm |
4,747 |
2,744 |
| Mo |
ppm |
4,038 |
0,225 |
| N |
ppm |
15,14 |
< 284 |
| Zn |
ppm |
11,08 |
21,87 |
| Co |
pprn |
2,575 |
< 140 |
| Fe |
ppm |
552,8 |
131,4 |
| Mn |
ppm |
22,39 |
10,76 |
| As |
ppm |
< 2,18 |
< 2,17 |
| Pb |
ppm |
< 0,867 |
< 0,861 |
| Se |
ppm |
< 1,49 |
< 1,48 |
| Absolute weight (bulk) |
kg/mc |
93 |
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| (*) Lignin,
Klason process - 2 h. in 2/1 v/v toluene/ethanol |
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| Source: Rowell, "Composite from kenaf fibers" - USDA
Forest Service -Madison Wisconsin 53705 USA - 1993. |
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Source: "Il kenaf, non solo una nuova materia prima cellulosica" - G. Mignoni |
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