The photosynthetic characteristics of strawberry(Fragaria x ananassa Duch. cv. Toyonoka)leaves under illumination of identical light intensity(55-57% natural li
Thermostable enterotoxinⅠ (ST1) mutant genes and thermolabile enterotoxin B subunit (LTB) genes were amplified by PCR from plasmids of Eschenichia coli C83902.
Using hybrid rice Shanyou63, the agronomic and economic characters of different nitrogen(N) managements were evaluated. The results showed that the grain yield