Chitosan is a good flocculant. The paper deals with the clarification of apple juice by means of chitosan. The results showed that the transmittance was over 97
. Locoweed is one of main poisonous plants in the world, and also is the most important toxic plant in grassland of China. The distribution range of the locowee
One-day-old healthy ducklings (n=100) were divided into control group and experimental group randomly, and selenium poisoning of ducklings was artificially caus