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—A fully digital feedforward Σ∆ modulator is described. The technique, here applied to a second order low-pass modulator, strongly reduces the operational amplifiers output swing, thus allowing the use of power effective single stage architectures. The method enables reduced slew-rate requirements and allows operation at lower power supply voltages. The… (More)
The members of the Committee appointed to examine the thesis of PRASANNA UPADHYAYA find it satisfactory and recommend that it be accepted. ___________________________________ Chair ___________________________________ ___________________________________ iii ACKNOWLEDGEMENT Throughout my stay at Washington State University, I have worked with numerous great… (More)
After the deprivation of gonad-inhibiting factor (GIF) from the brain in adult Nemertines of both sexes, the sexual characters appear and/or grow rapidly. Very early, RNA synthesis is promoted in young oocytes, DNA synthesis is increased in spermatogonia and primary spermatocytes and protein synthesis is significantly increased in germ cells and sexual… (More)
Deprivation of gonadostatin (gonad-inhibiting hormone: GIH) performed during the quiescent period of the annual reproductive cycle in the hoplonemertean, Amphiporus lactifloreus, resulted in precocious sexual maturation. In female worms, the oometrical analysis showed that the hormone target, the ovary, responds to GIH deprivation by accelerated growth of a… (More)
The localization, structure and function of two types of nuclear bodies have been investigated by cytological and cytochemical electron microscopy methods in oocytes from the Hoplonemertean, Amphiporus lactifloreus. Type I nuclear bodies differentiate in contact with the nucleolus-DNA body complex, whereas type II nuclear bodies develop close to the… (More)
In Physarum polycephalum, the study of RNA metabolism just after metaphasis shows an important 3H-uridine incorporation. Most of the labelling is found in the nucleolus when we can see it again during interphasis. Therefore a ribosomal RNA synthesis does exist before any visible nucleolar structure.
The members of the Committee appointed to examine the thesis of MATTHEW JOHN ZAHLLER find it satisfactory and recommend that it be accepted. ___________________________________ Chair ___________________________________ ___________________________________ ii ACKNOWLEDGMENT I would like to first acknowledge the help of my advisor Dr. George La Rue for his… (More)