The delayed anovulation syndrome: influence of hormones and correlation with behaviour

Experiments were conducted to assess the influence of the ovary and various steroid treatments on the development of the delayed anovulatory syndrome (DAS) in female rats. The influence of neonatally administered androgen on the development of ovarian function and female sexual behaviour was studied. It was found that neither the presence of the ovary nor the administration of oestrogen or androgen affected the time-course of the DAS. Doses of androgen which produced the DAS had little effect on female sexual behaviour and there was no evidence of time-dependent changes in sexual behaviour comparable to the time-dependent changes of ovarian physiology observed during the DAS.     

Inter-transverse-mode injection locking and subthreshold gainmeasurements in a CO2 waveguide laser

A higher order CO₂ waveguide laser resonator mode has been studied both above and below threshold, by reinjecting a frequency shifted portion of the laser output back into the resonator. The relative reinjected (autodyne) gain profile in the vicinity of the subthreshold transverse mode is shown to shift in frequency, reduce in spectral width, and increase in magnitude as the subthreshold mode is brought nearer to threshold by tilting one of the resonator mirrors. Once above threshold, inter-transverse-mode injection locking has been demonstrated, and close to the locking-point higher order terms from the nonlinear interaction are clearly evident     

The conversion of polysaccharides to hydrogen gas. Part II: The catalytic decomposition of formaldehyde in the aqueous phase

The aqueous phase decomposition of formaldehyde, to hydrogen gas, catalysed by platinum—copper chromite, has been carried out in the temperature range 20–60°C, at a solution pH of 12. The production of hydrogen was favoured by intermediate temperatures (40–50°C) and an activation energy of 22.2 kJ mol^?1 (5.3 kcal mol^?1) was recorded. The rate of reaction was first order with respect to OH^? ion concentration at low alkali concentrations and was first order with respect to HCHO concentration at all concentrations. At high alkali concentrations the reaction should become zero order with respect to OH^? ion concentration, but initial rates actually decrease under these conditions having passed through a maximum. The rate of reaction was directly proportional to catalyst weight at low catalyst loading, but the relationship became non-linear at high catalyst loadings. Conversions of formaldehyde to hydrogen gas were substantially less than theoretical. The decomposition reaction has to compete with a number of side reactions such as polymerization of formaldehyde at low temperatures (<40°C) and at higher temperatures with the Cannizzano reaction, aldol condensation, and possibly formaldehyde hydrogenation to methanol. In addition hydrogen loss may occur due to copper chromite reduction. A reaction mechanism is proposed involving a surface formate intermediate.     

Integrating-input technique for c.c.d.

A simple rearrangement of the usual waveforms and voltage levels on the input terminals of a charge-coupled device can be used to integrate the input signal during the intersample interval. The method automatically provides a lowpass filter characteristic matched to the sampling time and tends to suppress high-frequency components and hence reduces aliasing problems. Adequate linearity and dynamic range are demonstrated.     

Dissolution of Palladium and Platinum from Automotive Catalysts

Automotive exhaust gas catalysts contain palladium and platinum as the active material on an alumina substrate. Experiments were conducted to determine the amount of palladium and platinum that could be leached from fresh and aged automotive catalysts under various conditions. The conditions included soaking the catalyst samples in rain water to simulate environmental leaching from discarded catalysts and in dilute hydrochloric acid to simulate the dissolution of noble metals from swallowed catalysts. To obtain the necessary sensitivity for measuring microgram quantities of these noble metals in the leachates, radiochemical techniques were used. The results indicate that only very small amounts of noble metals are leached from fresh catalysts; the extent of dissolution depends upon catalyst pretreatment and the leaching solution. The dissolution of noble metals from aged catalysts (80,000-km vehicle tests) is one tenth that of fresh catalysts.     

Personality correlates of dream recall.

Used the 16 Personality Factor Questionnaire (16 PF) to discriminate between those who frequently recall dreams and those who do not and to specify which traits contributed most to accuracy of discrimination. Discriminant analysis of 16 PF measures showed an almost perfect discrimination between 2 groups of undergraduates (n = 50), chosen by the diary method, as frequent and infrequent recallers. This result was substantially confirmed in a cross-validation sample of 40 Ss in which an overall accuracy of discrimination of 75% was achieved. 6 primary traits (Ego Strength, Guilt Proneness, Superego Strength, Parmia, Premsia, and Radicalism) were identified and confirmed by canonical analysis as contributing most to discrimination. Results indicate that the frequent recaller experiences less and the infrequent recaller experiences more intrapsychic conflict. (PsycINFO Database Record (c) 2010 APA, all rights reserved)