To construct the suicide vector of hhd B gene marker-free mutant in Haemophilus parasuis( HPS),two pairs of specific primers were designed and synthesized accor
[Objective] The differences in effective components contents of Lysimachia clethroides Duby were compared using three extraction methods. [Method]L. clethroides
The essential oils were extracted from flowers and branches of Cestrum genus plant Telosma cordata(Burm. F.) Merr.,and used for purifying the mosquito-repellent