[Spectroscopic studies of the molecular composition of the dentinal and gingival fluids and their diagnostic potential for preventive screening of dentin caries].

Purpose Of The Study: The aim of the work is a spectroscopic investigation and comparison of the molecular composition of dentine and gingival fluids as well as of their diagnostic potential for the preventive screening of dentin caries.

Material And Methods: Applying infrared spectroscopy including synchrotron radiation the samples of biological fluids taken from the oral cavity (dentine fluid, fluid from the gingival sulcus and blood) were studied for the patients with the progressive dentine caries. The part of this research was undertaken with the infrared microspectroscopy beamline at the Australian Synchrotron.

Effects of Hyperbaric Oxygen Therapy on Brain Perfusion, Cognition and Behavior in Fetal Alcohol Spectrum Disorder-A Case Study.

A 15-year-old girl diagnosed with FASD underwent 100 courses of hyperbasic oxygen therapy (HBOT). Prior to HBOT, single motion emission compute tomographic begin imaging (SPECT) revealed areas of hypo-perfusion bilaterally in the orbitofrontal region, temporal lobes and right dorsolateral-frontal, as well the medial aspect of the left cerebellum. Following two sets of HBOT treatments (60 plus 40), over 6 months, there was improvement in perfusion to the left cerebellum as well as the right frontal lobe.

Montelukast use during pregnancy: a multicentre, prospective, comparative study of infant outcomes.

Background: Montelukast (Singulair) is a selective leukotriene receptor antagonist (LTRA) indicated for the maintenance treatment of asthma. Currently, there are limited prospective, comparative studies in the literature examining the safety of montelukast use in pregnancy.

Objectives: The primary objective of this study was to determine whether exposure to montelukast during pregnancy increases the rate of major malformations above the 1–3% baseline risk or the rate of other adverse effects.

Shear bond strength of composite resin to fresh amalgam.

The shear bond strength between fresh amalgam and composite resin using three adhesive systems was assessed. Amalgambond (5.19 MPa), All-Bond (3.

Haem localization in haemoproteins by spin and triplet tools.

The rate constants of efficient exchange interaction (kex) of spin-labelled lysozyme and the triplet probes perylene, eosine and anthracene butanoic acid with the haemoproteins were measured in microsomes and in solution by electron paramagnetic resonance and by the registration of delayed annihilation fluorescence. Constants of efficient exchange interactions with the haem groups of myoglobin, haemoglobin, cytochrome c and b5 are 3-22 X 10(7) M-1 s-1 in solution. The experiments with membrane-bound cytochrome P-450 revealed no exchange interactions with the probes located in solution or in the membrane.

[Application of phosphorescent probes in investigations of model and biological membranes].

Possibility of using phosphorescent probes for membrane investigations was analysed on lecithin liposomes and rat liver microsomes taken as an example. It was shown that one quencher molecule on 10(4) lecithin molecules is sufficient for experimental registration of diffusion-controlled quenching of erythrosine phosphorescence by stable nitroxide radicals. It is possible to study the diffusion processes with D = 10(-5) divided by 10(-9) cm2s-1.

[Reduction of spin labels with ascorbic acid in solution and on biomembranes].

Dependence of the rate of nitroxyl radical reduction with ascorbic acid upon pH, ionic force, temperature, type of radical and dielectric constant of the solvent is reported. The factors mentioned are essential for interpreting the results obtained for biomembranes. It is shown that under physiological pH the reduction is determined by ascorbic acid monoanion and unprotonated radical interaction.

[Study of spin-labeled microsomal membrane proteins by their reaction with ascorbic acid].

Kinetics of the reduction of nitroxyl radicals bound to SH-groups of microsome membrane proteins by ascorbic acid was investigated. The reduction involves two steps. During the first quick step mainly the radicals with weak immobilization located on the membrane surface are reduced.

[Extraction of cholesterol from vessel walls by surface-active agents and organic solvents].

Low concentrations (0.1--1.0%) of surface-active substances Tween-20, Triton X-100 and sodium deoxycholate were shown to extract 20--40% of cholesterol from dog vessel wall.