Conditioned place preference and aversion for music in a virtual reality environment.

The use of a virtual reality environment (VRE) enables behavioral scientists to create different spatial contexts in which human participants behave freely, while still confined to the laboratory. In this article, VRE was used to study conditioned place preference (CPP) and aversion (CPA). In Experiment 1, half of the participants were asked to visit a house for 2 min with consonant music and then they were asked to visit an alternate house with static noise for 2 min, whereas the remaining participants did the visits in reverse order.

Effects of daily anti-estrogen treatment on uterine growth and progesterone receptor concentrations in adult rat uterus.

The effects of daily Tamoxifen treatment on adult rat uterus weight depend on the degree of estrogenic impregnation of the animal. In intact animals, Tamoxifen caused a decrease of the uterine weight. A weight increase was observed, after castration, which was dose-dependent without reaching saturation even with 500 micrograms of Tamoxifen per day.

Independent regulation of growth and steroid receptors in uterus and mammary tumors of rats.

Anti-estrogens and progestagens are synergistically active in the treatment of hormone dependent tumors. The combined action of both compounds in daily treatment schedules are analyzed in rat uterus and in DMBA- induced rat mammary tumors. Tamoxifen in contrast to estradiol does not significantly affect tissue growth, while PgR induction is considerably stimulated by Tamoxifen.

Influence of dose rate on fast neutron OER and biological effectiveness determined for growth inhibition in Vicia faba.

The influence of dose rate on the effectiveness of a neutron irradiation was investigated using growth inhibition in Vicia faba bean roots as biological system. d(50) + Be neutron beams produced at the cyclotron CYCLONE of the University of Louvain-la-Neuve were used, at high and low dose rate, by modifying the deuteron beam current. When decreasing the dose rate from 0.

OER and RBE of high energy neutron beams for growth inhibition in Vicia faba.

The radiobiologic characteristics of 15 MeV neutrons produced by the d + T reaction at the TNO of Rijswijk and of neutrons produced by the d(50) + Be and p(75) + Be reactions at the cyclotron Cyclone of Louvain-la- Neuve were compared. Growth inhibition in Vicia faba bean roots was used as biologic system. An OER value of 1.

[Correlation between cell fluorescence for estrogen receptors and the hormone-dependence of breast cancer].

In 27 postmenopaused patients cellular ER has been assessed after fine needle aspiration by estimation of the cytoplasmic or nuclear fluorescence intensity after incubation with 27 beta-estradiol-6-carboxymethyl oxime-bovine serum albumin-fluorescin isothiocyanate. The cellular changes in the fluorescence intensity and tumor size after a 7 days treatment with Tamoxifen (TMX) have been studied. These factors have been correlated with the anatomoclinical factors.

[Relative biological effectiveness (RBE) of low-dose californium-252].

Relative biological effectiveness (RBE) of 252Cf, with respect to 192Ir, has been determined at the low dose rates commonly used in interstitial and intracavitary therapy. The biological criterion was growth reduction in Vicia faba bean roots. Two varieties of Vicia faba were used.