Quantum ghost polarimetry with entangled photons.

The theory of the formation of polarization ghost images in biphoton light of spontaneous parametric scattering is developed. On the basis of the developed theory, the quantum ghost polarimetry concept has been suggested, which makes it possible to obtain two-dimensional maps of the polarization properties of objects by measuring a set of correlation functions obtained in various polarization states of photons. For objects with linear dichroism, a complete set of measurement states is found, which allows for obtaining the maps of the distributions of absorption, value, and azimuth of anisotropy.

Ghost polarimetry with unpolarized pseudo-thermal light.

We present an experimental implementation of the ghost polarimetry concept in unpolarized light, which allows obtaining complete information on the spatial distribution of polarization properties of objects with linear dichroism. It is theoretically shown that it is possible to restore the spatial distribution of the azimuth and a value of anisotropy of such objects. The developed technique allows us to free up the object arm from all additional optical elements, including polarizers.

Dual wavelength Talbot self-imaging using facet patterned nonlinear crystals.

A method for functional patterning of facets of a nonlinear crystal using focused ion beam milling has been developed. The near-field diffraction on periodic gratings has been experimentally and theoretically studied. The periodicity of the structure enables Talbot self-imaging at the fundamental and second-harmonic frequencies simultaneously.

Frequency doubling in periodic nonlinear photonic crystals mediated by random layers.

We study the frequency doubling in a quadratic nonlinear photonic crystal consisting of periodically poled structures mediated by uniform layers with random lengths. These structures can be formed by new local impact methods for ferroelectric crystal structuring. The statistical frequency doubling theory is developed for such structures.

[On respiratory protection of workers].

The article deals with employer's requirements regulating choice and management of respirators use in RF. Considerations include drawbacks of these requirements, their inadequacy to contemporary western standards, and evidences that fulfilment of these requirements fails to reduce risk of polluted air effects towards the safety. The authors demonstrate that decreasing jeopardy class with workers' use of respirators according to legal regulations is unallowable.

Nonlinear Raman-Nath diffraction of femtosecond laser pulses in a 2D nonlinear photonic crystal.

We study second-harmonic generation (SHG) of femtosecond laser pulses in a rectangular two-dimensional nonlinear photonic crystal (NLPC). Multiple SH beams were observed in the vicinity of the propagation direction of the fundamental beam. It has been verified that the angular positions of these beams obey the conditions of nonlinear Raman-Nath diffraction (NRND).

Peripheral blood NK cells expressing HLA-G, IL-10 and TGF-β in healthy donors and breast cancer patients.

Human natural killer (NK) cells are not only professional cytotoxic cells integrated into effector branch of innate immunity, but they are also regulatory cells, managing different immune processes. Immunoregulatory NK cells, expressing HLA-G and IL-10, have been generated in vitro from human hematopoietic progenitors and found in vivo among decidual NK cells of pregnant women. Human peripheral blood NK cells have been shown to acquire suppressive properties after HLA-G uptake during trogocytosis.

Multiple quasi-phase-matching in nonlinear Raman-Nath diffraction.

The method of the superposition of a nonlinearity modulation is employed to design a two-dimensional (2D) nonlinear photonic lattice for efficient multiple quasi-phase-matched second harmonic generation in the process of nonlinear Raman-Nath diffraction (NRND). An analytical solution is proposed to calculate the second harmonic intensity in rectangular 2D lattices. This approach can be useful for the generation of multiple second harmonic beams with the efficiency a few orders of magnitude higher than in the case of nonphase-matched generation via NRND.

[Proper use of gas masks as prevention of occupational diseases].

In the paper there are considered the problems arising from the use of respirators: 1. Modern methods used to replace the gas mask filter, 2. Conditions for safe re-use filters which are not fully developed their service life period 3.

[On individual protective means for workers' respiratory organs (review of literature)].

The article covers topics of selecting and organizing the application of individual protective means for respiratory organs in Russian Federation and abroad. The authors reviewed recommendations of the national authors on respirators selection (over last 50 years) and demonstrated the inconsistency with contemporary worldwide practice. Absent legal regulation of respirators selection and of respiratory organs protection programs, lack of training programs and tutorials based on legislation requirements can be potentially harmful for workers' health.

[Individual devices for protection of the respiratory organs against dust].

The article covers efficiency of individual protective means for respiratory organs in high dust content of workplace air, define ways to increase the efficiency.

[Specificity of the lipoproteins metabolism in rats].

The article reviews the data on rat lipoproteins metabolism and points to some principal differences from that in humans. Sixteen such differences are described concerning spectrum of lipoproteins, their quantity and chemical composition, characteristics of biosynthesis and catabolism, absence of the systems of lipid transport between some classes of lipoproteins.

[Blood serum cholesterol and the state of the immune system].

This review deals with information on the relationship of the immunity system and the lipid transport system. The data of literature and the results obtained by the authors indicated that an elevated level of cholesterol in the blood serum is associated with the increased activity of the immunity system. On the one hand, lipids and their metabolites produce an immunomodulating effect and, on the other hand, biologically active molecules, synthesized by immunocompetent cells in the process of their activation and proliferation, regulate lipid metabolism.

Effect of bile acids on the proliferative activity and apoptosis of rat hepatocytes.

Bile acids are known to have damaging as well as protective effects on liver cells. A likely candidate for bile acid-mediated hepatocellular injury during cholestasis is glycochenodeoxycholic acid (GCDCA), a hydrophobic bile acid with a direct cytotoxic effect on hepatocytes. In contrast, ursodeoxycholic acid was shown to exhibit protective effects.

Antiatherogenic effects of 17 beta-estradiol and 17 alpha-estradiol and its derivative J811 in cholesterol-fed rabbits with thyroid inhibition.

Objective: The aim of this study was to investigate the antiatherogenic effects of 17 beta-estradiol and 17 alpha-estradiol and its derivative J811 (estra-1,3,5(10),8-tetraene-3, 17 alpha-diol), having a non-feminizing effect and high antioxidant potential, in male rabbits.

Experimental Design: Male White-Russian rabbits weighing 2.1-2.

[The role of biochemical study of the saliva in diagnosing diseases].

Mixed saliva contains numerous biological molecules which participate in regulation of the functions of the major physiological systems or are products of their work. Therefore, salivary components reflect the status of body systems and can provide diagnostic information about their abnormalities.

Effect of polyunsaturated phosphatidyl-choline on lipid transport system in alcoholic liver injury.

The aim of this study was to determine whether serum lipid composition and lipolytic activities in alcoholinduced liver dystrophy were modified by the co-administration of polyunsaturated phosphatidylcholine (PPC). Chronic alcohol intoxication was induced in rats by intragastric ethanol administration of 3.5 g/kg body weight per day over 56 days.

[The radioprotective properties of a lipocarotenoid extract of Rhodotorula glutinis yeasts].

The dynamics of formation of lipids and carotinoids by the Rh. glutinis yeast and the influence of the culture's age on the composition of the product were studied. The composition of a lipocarotinoid complex isolated from the yeast (at a stage of its stationary growth) was determined.

[Effect of polyunsaturated phosphatidylcholine on the activity of antioxidant and lipolytic enzymes in alimentary hypercholesterolemia in irradiated rats].

A high-cholesterol diet containing 3.5% cholesterol, 0.2% methyl thiouracil and 20% of heated sunflower-seed oil caused an increase in the content of cholesterol, triacylglycerols, diene conjugates and in the activity of phospholipase A2 in rat liver and of serum total cholesterol and cholesterol of low density lipoproteins, and a decrease in the activity of hepatic cholesterol esterase, in the fractional activity of lecithin:cholesterol acetyl transferase (LCAT), in the activity of the enzymes involved in the lipolytic transformation of lipoproteins and in the serum levels of very low density lipoprotein cholesterol.

[Differential forms of self-directed study of biochemistry in medical schools].

Methods of self-directed study of biochemistry by students are considered in connection with initial levels of their theoretical knowledge and laboratory experience. This type of training involved individual tasks and free discussion on the results obtained. Optimal results were observed in organization of self-directed work in small groups.

[Status of the pituitary-adrenal system and biogenic amine levels after extensive resection of the intestines].

A clinico-experimental investigations for the determination of contents of serotonin, histamine, 11-OCS and ACTH in blood as well as excretion of adrenaline and noradrenaline after extensive resection of the intestine are described. It was shown that the dynamics of contents of biologically active substances in the blood depended on the level of resection and terms after operation. Extensive resection of the intestine is followed by inhibition of the sympatho-adrenal system resulting in reduction of noradrenaline in blood and its excretion with increased excretion of adrenaline.

[The characteristics of the lecithin-cholesterol-acyltransferase reaction in the blood serum during liver regeneration].

The rate of cholesterin ether formation in blood serum during the periods of rapid recovery of liver mass decreases after partial hepatectomy in rats. This effect is connected with the changes in quantity and composition of lecithin cholesterin acyltransferase (LCAT) as well the kinetic characteristics of lipoprotein of high density. This ferment was isolated from blood serum and purified in 28,500 times at different periods of liver regeneration.