Very recently, Kawata et al.(2014)
optimized culture conditions to maximize (R)-3-HB secretion by
Halomonas sp. KM-1 using simple nitrate fed-batch cultivation and
achieved 40.3 g/L (R)-3-HB with one of the highest productivity of
0.48 g L1 h1 with 20% (w/v) glucose under the microaerobic
condition