The glutathione S-transferases (GSTs) are a family of isoenzymes involved in the detoxication of a variety of electrophilic xenobiotics. The present investigation demonstrates that GST activity and the concentration of cytosolic GSTs in cerebellar cortex of Gunn rats were increased in hyperbilirubinaemic animals compared with non-jaundiced controls. Age-dependent and region-specific increases i...

The dynamic characteristics of GaN-based Gunn and IMPATTs are reported at same operating conditions to find out the potentiality of each device to use as high frequency signal generator. The general model is developed by the author’s group considering all the physical phenomena for both the devices. It is seen that Double Drift Region IMPATTs produce better microwave power compare to Gunn diode...

The family Discodorididae was previously represented by 11 species in Brazil; however, recently collected specimens from several localities in Rio de Janeiro, in addition to the study of material previously deposited in scientific collections, revealed the existence of 13 taxa: Diaulula greeleyi (MacFarland, 1909), Discodoris hummelincki (Ev. Marcus & Er. Marcus, 1963) comb. nov., Discodoris br...

A current controlled bistable switching element using a CW Gunn diode is reported. With modest circuits switching rates of the order of 10 MHz have been obtained. Switching is initiated by current pulses of short duration (5 10 ns). Rise times of the order of several nanoseconds could be obtained. The apparent mechanism which allows the bistable operation of the Gunn diode is the reduction in t...