able to be recycled into the same reaction the filtrate 0 8 1 1 contained 0 4 kg of nag nam in a ratio of 1 1 according to gc analysis selection for rapid growth in the presence of elevated nam concentrations or simple batch process 2 l of the mineral salt medium cf table 1 below containing 40 g l of an nag nam mixture 1 1 was inoculated with 80 ml of a preculture of the strain kha or kha1 grown overnight on mineral medium containing 5 g l of nag od gt 4 and fermented at ph 7 30 u00b0 c with aeration and stirring after 16 hours the od 650 nm was 13 7 strain kha and 15 5 strain kha1 respectively and only traces of nag if any at all were found in the medium which did however contain nam gc analysis nag nam lt 5 95 strains such as klebsiella pneumoniae kha dsm 12702 and kha1 dsm 12703 which grew rapidly and selectively on nag in the presence of nam were selected 1 5 l of mineral salt medium cf table 1 below containing 40 g l of an nag nam mixture 1 1 was inoculated with 100 ml of a preculture of the strain kha grown overnight on mineral medium containing 10 g l of nah od gt 4 and fermented at ph 7 30 u00b0 c with aeration 1 5 l of air min and stirring 500 rpm after 14 hours 360 ml of a 46 percent strength solution of nag nam mixture 1 1 total 113 g of nag 113 g of nam corresponding in each case to 57 g l was added after 29 5 hours the od 650.