| 摘要 |
<p>PCT No. PCT/FI93/00308 Sec. 371 Date Mar. 17, 1995 Sec. 102(e) Date Mar. 17, 1995 PCT Filed Jul. 29, 1993 PCT Pub. No. WO94/03062 PCT Pub. Date Feb. 17, 1994Microcrystalline chitosan is used in seed encrusting in the form of liquid dispersion containing 0.0001-10 wt. % of polymer characterized by average molecular weight not lower than 1000, water retention value ranging from 200 to 5000%, deacetylation degree not lower than 35%, particle size in the range of 0.1-100 mu m and energy of hydrogen bonds in a form of film of 10-25 kJ/mol. The liquid dispersion is introduced by spraying or mixing with a content of polymer not lower than 0.01 wt. %, whereafter the excess of solvent is removed and polymer film covering the seed is formed.</p> |
