Stopped-flow spectrophotometry and e.p.r. spectroscopy were used to study the kinetics of reduction by dithionite of the oxidized Fe protein of nitrogenase from Klebsiella pneumoniae (Kp2.0 ) in the presence of MgADP at 230C at pH7.4. The active reductant, SO2-, produced by the predissociation of S2042= 2SO2-, reacts with Kp20. (MgADP),, with k 3.0 x 106 + 0.4 x 106 M-l' s-1. The inhibition of ...

Up to the present in this country there has not been a great deal of systematized work done along the lines of child guidance. On the medical side much attention has been paid to the problem of mental deficiency, but with this child guidance has little or nothing to do, except in so far as it may be necessary to recognize the mental defective who comes to the clinic and transfer him to the care...

The Nazis were able to capitalize on this authoritarian conception, just as they were able to play on the differences between the more conventionally authoritarian and scientific supporters of racial hygiene and the radical anti-Semites and racists. Just as Weindling provides a more complex understanding of the German Sonderweg, so he demonstrates that the most extreme Nazi measures of forced s...