[Concentration of calcium ions in the saliva and the value of the pH of the saliva in female and male smokers].

Dental decay is a pathological process of extrasomatic origin which leads to demineralization and proteolytic degradation of hard surfaces of a tooth susceptible to this disease. Saliva composition, including calcium ion concentration and its pH value, is of importance in the development of the carious process. Tobacco smoke contains toxic compounds which negatively influence oral health.

The effect of oscillating low intensity magnetic field on the Na+, K+, Ca++, and Mg++ concentrations in the maternal and fetal circulation of the dually perfused human placental cotyledon.

Dual-sided perfusions of the human placental cotyledon in vitro were used to study effects of low intensity magnetic fields (MFs) of 2 mT, 50 Hz (E1, 10 perfusions) and 5 mT, 50 Hz (E2, 10 perfusions). In the control group C (10 experiments) no field was used. Perfusions lasted 180 min each.

[Oxygen transfer and consumption in human placenta exposed to variable magnetic fields in vitro].

The initial investigations concerning the influence of variable magnetic fields (MF) on transfer and oxygen consumption in isolated human cotyledon in vitro were performed. Ten dual closed perfusion of the human cotyledon were conducted in each group. The control group was not exposed to magnetic fields.

[Evaluation of the morphology of the human placental cotyledon following dual in vitro perfusion in variable magnetic field].

Unlabelled: Objectives and the aim of the study was electron-microscopy morphological estimation of the human placental cotyledon after 180 minutes of dual closed perfusion in vitro.

Materials And Methods: In the experimental group the cotyledons were exposed to variable magnetic field of 2 mT magnetic induction and 50 Hz frequency. The control group K (10 perfusions) was not subjected to magnetic field while the experimental group B (10 perfusions) was influenced by magnetic field.

[Influence of valproic acid (depakine I.V.) on human placenta metabolism--experimental model].

Objectives: The pregnancy in women with epilepsy is associated with an increased incidence of congenital malformations in offspring. Currently, anti-epileptic drugs (AEDs) are concerned to be a major etiologic factor of abnormal fetal development but the pathomechanism of teratogenicity of AEDs is complex and not well understood. The purpose of this study was to evaluate an influence of one of the AED-valproic acid (VPA) on placental metabolism (glucose consumption and lactate production).

[The dually perfused human placenta by Schneider method modified Miller. II. Changes of arterial and venous fetal blood pressure].

The study was carried out on 7 human placental cotyledons. Placental perfusions performed by Schneider method modified by Miller were conducted for 180 min. assessment of arterial and venous pressure in fetal blood was performed.

[The dually perfused human placenta by Schneider method modified by Miller. I. Changes of arterial and venous pH in material and fetal blood].

The study was carried out on 7 human placental cotyledons. Placental perfusions performed by Schneider method modified by Miller were conducted for 180 min. Assessment of arterial and venous pH in maternal and fetal blood was performed.