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Biomedical subjects

A V Sergienko

Publications and source records attributed to A V Sergienko.

12 recordsLinked to original sources
PubMed2001

Role of entanglement in two-photon imaging.

The use of entangled photons in an imaging system can exhibit effects that cannot be mimicked by any other two-photon source, whatever the strength of the correlations between the two photons. We consider a two-photon imaging system in which one photon is used to probe a remote (transmissive or scattering) object, while the other serves as a reference. We discuss the role of entanglement versus correlation in such a setting, and demonstrate that entanglement is a prerequisite for achieving distributed quantum imaging.

Journal Article↗
PubMed2001

Entanglement in cascaded-crystal parametric down-conversion.

We use spontaneous parametric down-conversion in a cascade of crystals, driven by a single monochromatic cw pump laser, to study the interference of entangled photon pairs. By changing the distance between the crystals, the observed quantum interference pattern varies continuously from that associated with a longer single crystal to that associated with independent emissions from two distinct crystals. Postselection via spectral filtering suppresses this phenomenon. These findings are expected to advance the field of quantum-state engineering.

Journal Article↗
PubMedDate not supplied

[Some aspects of cerebral autonomic vascular dystonia in patients with mitral valve prolapse].

Some aspects of origination of vegetovascular dystonia (VVD) in patients with mitral valve prolapse are considered. Forms of VVD manifestation are presented. Possible causes of VVD development accompanying mitral valve prolapse are analyzed. Original investigations have been carried out designed to study the condition of cerebral bloodflow in those patients suffering from VVD as a manifestation of mitral valve with the aid of the transcranial dopplerography technique. The authors have come to the conclusion that it is necessary for us to use a differentiated approach toward choosing a corresponding policy of managing patients.

Adolescent↗
PubMedDate not supplied

[Studying the anti-ulcer activity of gastrobiol].

Gastrobiol--a new preparation comprising a mixture of lyophilized sea-buckthorn oil, vitamin U, and magnesium oxide, produces a pronounced antiulcerous action on the mucous membrane of the stomach and duodenum. The regenerative effect of gastrobiol is more pronounced than that of pure sea-buckthorn oil and methyluracil.

Animals↗
PubMedDate not supplied

[Effect of sealed chamber conditions on the functional state of the human adrenal cortex (based on data from a study of the 11-hydroxycortico-steroid content in the blood plasma)].

The effect of a changed atmosphere, hypoxia, hypercapnia, their combinations and different motor activities on the adrenocortical function was studied in 36 test subjects kept in an 8 m3 altitude chamber. Human adaptation to the environmental changes developed with an active involvement of the adrenal cortex. The level and direction of the changes depended on both the force of the influences and on the initial state of the test subjects.

11-Hydroxycorticosteroids↗