By using a selective medium, four mycoplasma isolates were obtained from swabs taken from the field cases of chronic respiratory disease in chickens.
应用选择培养基，从鸡慢性呼吸道病的自然病例中分离鸡毒霉形体，在棉拭样本中得到四个霉形体分离物。
Objective to develop a selective medium that shows comparable stronger selective action to streptococcus suis in order to isolate streptococcus suis from the pollution sample.
目的研制一种对猪链球菌有较强选择作用的选择性培养基，用于污染标本中分离猪链球菌。
Variable color luminescence in ionized gases can be obtained by controlling the electron energy to produce selective excitation in a suitable variable color luminescence medium.
在合适的变色发光介质中，通过控制电子能量产生选择性激发能获得电离气体变色发光。
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