Computer analysis of microstructures for evaluation of the effect of beta-irradiation on the skin]

Hormonal levels were tested in postweanling rats, because these had not been well established despite much testing on adult animals. Holtzman rats, 25-26 days old, that had been handled daily were decapitated at various times of the day. Radioimmunoassays were used to measure serum levels of luteinizing hormone, follicle stimulating hormone (FSH), testosterone, androstenedione, progesterone, and 20alpha dehydroprogesterone. Only FSH, testosterone, and androstenedione showed a significant variation with time. The maximal values occurred late in the dark and early in the light period.     

Format for the Convention.

The purpose of this comment is to generate a controversy. The topic: that grand institution, the annual convention. As practicing engineering psychologists we frequently find ourselves at conventions of diverse professional groups. Our conviction, growing out of these experiences, is that attendance at psychology conventions provides relatively little return for our time and expenses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Parametric amplification of magnetostatic, magnetoelastic and acoustic waves for microwave delay at room temperature

This letter describes enhanced microwave delay by parametric amplification of magnetostatic, magnetoelastic and acoustic waves. The observations were made at room temperature in single-crystal yttrium-iron garnet (y.i.g.) at 1 Gc/s, and display low pump-power threshold for all three effects and 40dB electronic gain for acoustic-wave amplification.     

A review of extractive processes for lithium from ores and brines

A review of the methods and techniques used to win lithium from pegmatites, natural brines and clays. Additionally, the present procedures for extracting lithium metal from the chloride are outlined with purification and analytical methods discussed. Areas where research would be of benefit are pointed out in those circumstances where additional information will improve process efficiency or increase reserves.