16、 uniport carrier 18、 antiporter 19、 Ion pump 20, proton pump transport 21、 active transport 23, selective absorpti 24, physiologically acid salt 25, physiologically alkaline 26, physiologically neutral salt 27, toxicity af single salt 28、 Ion antagonism 29、 balanced solution 30, exchange adsorption 31、 ectoderma 33、 transamination 4. biological nitrogeon fixate 35、 nitrogenase 36、 transport protein 37、 nitrate reductase 38 critical concentration１０ 16、uniport carrier 17、symporter 18、antiporter 19、ion pump 20、proton pump transport 21、active transport 22、calcium pump 23、selective absorption 24、physiologically acid salt 25 、 physiologically alkaline salt 26、physiologically neutral salt 27、toxicity af single salt 28、ion antagonisn 29、balanced solution 30、exchange adsorption 31、ectodesma 32、induced enzyme 33、transamination 34.biological nitrogeon fixation 35、nitrogenase 36、transport protein 37、nitrate reductase 38、critical concentration