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PubMed2006

Light diffraction by a strong standing electromagnetic wave.

The nonlinear quantum interaction of a linearly polarized x-ray probe beam with a focused intense standing laser wave is studied theoretically. Because of the tight focusing of the standing laser pulse, diffraction effects arise for the probe beam as opposed to the corresponding plane wave scenario. A quantitative estimate for realistic experimental conditions of the ellipticity and the rotation of the main polarization plane acquired by the x-ray probe after the interaction shows that the implementation of such vacuum effects is feasible with future X-ray Free Electron Laser light.

Journal Article↗

PubMed1979

[The neuroendocrine response to Alfatesine or Ethrane anesthesia in humans].

The description of neuro-endocrine effects due to surgical stress and certain anaesthetic products led the authors to look for the action of alfadione and enflurane on the hypothalamic-hypophyseal-thyroidian-adrenal axis. Taking 20 subjects who were divided into three groups of 10, the authors measured the plasma levels of T3, T4, TSH, cortisol and ACTH during anaesthesia with alfadione (without surgery). This was group I. Group II were patients during surgery under alfadione. Group III was during surgery under enflurane. The results show the absence of significant changes in the plasma levels of the hormones measured. The authors conclude that alfadione changes the levels of T3, T4, TSH and cortisol even less than does enflurane, whether the anaesthesia is isolated or in a patient undergoing surgery.

Adrenocorticotropic Hormone↗