Nitrate reductase of rice (Oryza sativa L.) under foot-rot disease

Studies reported here reveal a low nitrate reductase activity in the shoots of MTU 9 rice plants while in roots high enzyme activity has been recorded.Under pathogenesis, a low nitrate reductase activity in the roots and a high enzyme activity in the shoots have been recorded in susceptible rice plants. In the resistant rice plants (GEB 24) no such marked difference in the enzyme activity has been observed.The effect of fusaric and gibberellic acid on this enzyme activity has been studied. In the case of fusaric acid, the nitrate reductase activity in the roots is inversely proportional to the concentration whereas in gibberellic acid, it is directly proportional to the concentration in the shoots.

Palliative surgery in tricuspid atresia. Forty-two cases

Forty-two children diagnosed as having tricuspid atresia with diminished pulmonary blood flow are discussed. Palliative shunt surgery was done in each of these children. None of the eight infants who weighed less than 10 lb. at the time of operation survived. In 17 operations on infants who weighed between 10 and 15 lb. there were four operative and four late deaths. Glenn's operation is practicable and has been found relatively satisfactory in this group. In 21 operations on children who weighed above 15 lb. there were no operative deaths and one late death. The 17 children aged over 1 year at the time of operation are alive. In one child heart failure followed a Potts anastomosis, but regressed after Glenn's operation.