PubMed Health⌕ Search

Biomedical subjects

V Novotná

Publications and source records attributed to V Novotná.

16 recordsLinked to original sources
PubMed2003

Competition between the chiral smectic-C* and hexatic phases.

A theory of the phase transition from the smectic-C* to the hexatic phase based on the free energy with the two different Lifshitz terms is presented. Competition between the elastic energies of the tilt angle and of the hexatic order leads either to the single helicoidal structure, or to the double modulated solitonlike structure, and the transformation between both can occur. The bond order and the tilt angle suppress each other and at the transition to the low-temperature hexatic phase a decrease of the tilt angle and an anomaly in the helical pitch occur. Approaching the hexatic phase transition the dielectric response is contributed mainly by the bond-order phason or (and) the tilt angle phason. While the bond-order phason frequency decreases the tilt angle frequency increases in the hexatic phase. Both situations are treated being observed in experiment.

Journal Article↗
PubMed1998

Effect of Bacillus firmus on antibody formation after mucosal and parenteral immunization in mice.

Immunostimulatory properties of B. firmus, a nontoxic, nonpathogenic G + bacterium of external environment, were described previously. Antiinfectious and antitumor activity, macrophage activation and strong polyclonal stimulation of B lymphocytes were proved in human, mice and rats. The adjuvant effect of B. firmus on specific antibody response to ovalbumin in BALB/c mice is the topic of the present study. Against our expectation, B. firmus exerts more suppressive than stimulatory effect on specific antibody response. Formolized B. firmus decreased anti-ovalbumin response after subcutaneous immunization and only slightly increased serum antibodies after intraperitoneal immunization. After mucosal immunization, both oral and rectal, ovalbumin itself did not cause a significant systemic response but induced IgA anti-ovalbumin response in the intestine. B. firmus applied together with ovalbumin increased systemic serum response but absolutely eliminated intestinal response. The rectal route of antigen administration has been found less convenient because of less precise dosing of antigen in this mode of immunization.

Adjuvants, Immunologic↗
PubMed1991

[Psychological disorders in Ethiopian university students--problems in transcultural psychiatry].

In the course of the ten-year period 1979-1988 the authors subjected to psychiatric examination or hospitalized 52 Ethiopian university students. The authors were concerned with the problem whether in the development and character of the psychopathological symptoms factors of the different cultural environment participated. University students sent to Czechoslovakia are a specific group which is not representative of the Ethiopian population. This may be the reason why the revealed symptoms did not differ markedly from conditions in the local population. This applies in particular to neurotic disorders, among which the neurasthenic syndrome predominated. In 14 hospitalized students schizophrenia was diagnosed 6 times, endogenous depression 6 times and neurotic symptoms due to maladaptation twice. The schizophrenic attacks presented classical symptoms, after their regression there was however, complete remission and thus the original diagnosis was somewhat doubtful.

Adolescent↗
PubMed1978

Stimuli eliciting sexual arousal in males who offend adult women: an experimental study.

The sexually arousing effects of short film scenes showing a naked actress's seductive behavior were phalloplethysmographically measured in 14 sexual deviates. These were males who had offended adult women, predominantly exhibitionists. Controls were 14 normal men. Deviates responded positively to the scenes and differentiated strong and weak seduction scenes similarly to normals. Consequently, the question arises of why deviates avoid their victim's erotic cooperation and why they do not offend their regular sexual partners. Post hoc analysis of five scenes which elicited a strikingly higher response in deviates than in normals suggested that these scenes contained reduced seductive behavior but unrestrained presentation of the genitals. This finding further encourages the laboratory study of stimulus conditions for abnormal sexual arousal which occurs during the sexual offense.

Adult↗