[Specialized fat-and-oil emulsion food systems for the prevention of hyperlipidemia and obesity].

The development of specialized fat-and-oil emulsion food systems for the prevention of hyperlipidemia and obesity is an important task of health concern in the Russian Federation. The aim of the study was to develop specialized fat-and-oil emulsion food systems for the prevention of hyperlipidemia and obesity, the distinctive features of which are the presence of functional ingredients and bioactive compounds that meet modern safety requirements, have a hypolipidemic effect and influence on body weight. Material and methods. As a source of fucoxanthin, an oil extract from the thallom (stratum) of the annual Undaria pinnatifida brown algae was used, obtained by re-extraction with soy oil for 8 hours from a glycerin extract (extractant - 60% glycerin solution, the duration of the process - 8 h). The determination of organoleptic parameters was carried out at a temperature of 20 °C 12 h after manufacture using standard methods. Organoleptic parameters were determined in the following sequence: consistency, appearance, color, smell, taste. Physical and chemical characteristics (mass content of fat, moisture, egg products in terms of dry yolk, acidity in terms of acetic acid, emulsion stability), acid and peroxide values were studied by standard methods. Fatty acid analysis of lipids was performed by gas-liquid chromatography. The fucoxanthin content was determined by spectrophotometric method. Results. The presented formulations of lipid compositions as the fat base of specialized oil-fat emulsion food systems for the prevention of hyperlipidemia and obesity included Schizochytrium sp. microalgae oil in a mass fraction of 3-6% as a source of ω-3 polyunsaturated fatty acids (PUFAs) (eicosapentaenoic and docosahexaenoic acids). An oil extract of U. pinnatifida brown algae in a mass fraction of 48-54% was used as a source of fucoxanthin. The total content of PUFA was significantly high - at least 73%, ω-6 PUFA prevailed (48.0-49.1%). However, the high content of ω-3 PUFA (at least 25%) should be also noted. The ratio of ω-3 to ω-6 PUFA was 1:1.72-1:1.90, which is atypical for individual vegetable oils traditionally used as the fat phase in fat-and-oil emulsion systems. The fucoxanthin content in the presented lipid compositions was 6.4-7.2 mg/100 ml. Edible fat-and-oil emulsion food systems for the prevention of hyperlipidemia and obesity (mayonnaise and mayonnaise sauces) with a given ratio of ω-3:ω-6 PUFA containing eicosopentaenoic and docosahexaenoic acids, as well as fucoxanthin, have been obtained. The extract of U. pinnatifida brown algae, containing fucoxanthin, significantly slowed down the processes of lipid oxidation and hydrolysis, as evidenced by changes in the peroxide and acid values of fat isolated from specialized fat-and-oil emulsion systems for the prevention of hyperlipidemia and obesity. Conclusion. Specialized fat-and-oil emulsion food systems for the prevention of hyperlipidemia and obesity (mayonnaise and mayonnaise sauces with different oil phase content), containing fucoxanthin, having an optimized fatty acid composition, a given ratio of ω-3:ω-6 PUFA, high content of essential PUFA (eicosopentaenoic and docosohexaenoic acids) are safe food products with traditional organoleptic characteristics and specified physical and chemical parameters.

[Functional food ingredient - chromium complex with protein fermentolysate of bivalve Mactra chinensis for the prevention of hyperlipidemia and obesity].

The creation of specialized food systems capable of correcting body weight and influencing lipid metabolism is an urgent task at the present stage. The main way to create such food systems is to modify product profiles (lipid, protein, carbohydrate, mineral, vitamin, etc.). The aim of the study was to obtain and characterize a new food source of an organic form of chromium for the prevention of hyperlipidemia and obesity in the form of a complex with peptide fractions of fermentolysate proteins of the Mactra chinensis bivalve mollusk from the Far Eastern region. Material and methods. Soft food parts of the Mactra chinensis bivalve mollusk from the Far Eastern region (the motor muscle and mantle) were used as objects of research. Mollusk specimens were collected in the Amur Bay in June - September 2022. Biotechnological modification of soft tissue proteins was carried out using alkaline protease protozyme B with the following parameters: the duration of the process - 12 and 24 hours, pH - 7.0-7.2, temperature 55 °C. The fractional composition of proteins and peptides was determined by medium pressure gel permeation chromatography, the molecular weight (MW) of proteins and peptides was calculated using MW markers by comparing retention volumes. Extraction of free amino acids was carried out with 70% ethanol for 24 hours at a temperature of 20 °C, the composition and quantitative content of amino acids were determined by HPLC. The complexation reaction was carried out by adding to the fermentolysate with stirring a 10% aqueous solution of CrCl3×6H2O in a mass ratio of 6.25 × nitrogen in the liquid fraction : chromium (III) chloride = 20:1. Process conditions: temperature 20-25 °C, time 60 min, pH 7.0-7.1. The chromium content was determined by the atomic absorption method using spectrophotometer. Results. The content of low-molecular fractions increased more significantly over time in the mantle fermentolysate. The content of the high-molecular fraction of peptides weighing more than 160 kDa was minimal for both the muscle and the mantle and didn't exceed 1.1%. Low-molecular fractions weighing no more than 18 kDa in the 24-hour fermentolysate accounted for 79.6% for the muscle and 86.9% for the mantle. The obtained fermentolysates were characterized by a high content of the biologically active amino acid taurine - 25.9% (muscle) and 30.05% (mantle) of the total amino acid content. The high content of such essential amino acids as glycine, alanine, leucine, lysine, and the conditionally essential amino acid arginine was also determined. The obtained fermentolysates of soft tissue proteins of the Mactra chinensis were characterized by a fairly balanced amino acid composition. It has been experimentally established that more than 84% of the total chromium content in muscle fermentolysate and 80.9% in mantle fermentolysate was associated with peptide fractions with molecular weights from 24 to 1.4 kDa, and the highest specific chromium content - 1.67 mg/g protein (muscle) and 1.58 mg/g protein (mantle) was determined in the interval fractions with molecular weights of 18.0-12.5 kDa. The minimum specific content of the trace element was established for high-molecular fractions of 160-67 kDa and low-molecular fraction weighing less than 1.4 kDa. Conclusion. Biotechnological modification of soft tissue proteins of the Mactra chinensis bivalve mollusk from the Far Eastern region made it possible to obtain a balanced amino acid composition fermentolysate with a high content of the free biologically active amino acid taurine. Fortification of the obtained fermentolysate with chromium demonstrated high efficiency of its binding to the amino acid and peptide matrices of the protein hydrolysate. The chromium complex with fermentolysate of proteins of the Mactra chinensis bivalve mollusk can be used as a food source of chromium and taurine, including as a functional ingredient in special food systems for the prevention of hyperlipidemia and obesity.

Endoparasites of Wild Boars (Sus Scrofa) in Primorsky Krai, Russia.

This study identified helminthic species among wild boars (Sus scrofa) in Primorsky Krai, Russia. In total, 66 fecal samples were taken from wild boars and examined using the floatation-sedimentation method to identify helminths eggs and protozoan cysts. Age and sex were estimated for each host animal investigated. The helminthic fauna of the wild boars examined involved six parasite genera, but 4 are helminths and 2 are protozoans: the nematodes Metastrongylus spp., Trichuris suis, Capillaria sp. and Ascaris suum; and the protozoan parasites Eimeria sp. and Cystoisospora suis. The most prevalent parasite was Metastrongylus spp. (13.6 %) followed by Trichuris suis (7.6 %). The other parasites found were Eimeria sp. (3 %), Ascaris suum (3 %), Capillaria sp. (1.5 %) and Cystoisospora suis (1.5 %). Not found positive correlation between the host's age and sex and the parasite prevalence. This was the first detailed study on helminths infections among wild boars in Primorsky Krai.

[Nutrition and biological value of food parts of a trade bivalve mollusk Anadara broughtoni].

Currently, the human diet includes different new products of seafishing, including non-fish--bivalves and gastropods, holothurias, echinoderms, jellyfishes that demands careful studying of their chemical composition. The purpose of the study was to determine the nutritional and biological value of all soft parts of the burrowing bivalve MOLLUSK Anadara broughtoni from the Far East region. It was established thatfood parts of a bivalve were significantly flooded (water content--73.5-84.2%), with the minimum water content in the adductor and maximum in the mantle. Dry solids are presented by organic (89-93%) and mineral (7-11%) components. Organic components consist of protein (14.6-20.7%), lipids (1.8-2.3%), carbohydrates (2.1-2.6%). The analysis of amino-acid composition of proteins of food parts of the mollusk of Anadara broughtonishowed the presence of all essential amino acids with slight differences in their content depending on the localization of the protein. All edible parts have tryptophan as the limiting amino acid. Muscle proteins have maximum level of lysine, methionine, cysteine, phenylalanine and tyrosine; mantle proteins--leucine, isoleucine and threonine; adductor proteins--valine, phenylalanine, tyrosine, methionine and cysteine. Predominant nonessential amino acids forproteins of all food pieces are glycine, aspartic acid, glutamic acid, arginine. The coefficient of amino-acid score differences of adductor protein (31.7%) is less than the same of cloak by 3.7%. The indicator "biological value" is maximal for adductor (68.3%), but the differenceformuscle is only 0.83%. Mantle proteins are characterized by minimum biological value (64.6%). The coefficient of utility of amino acid composition of protein is maximalfor muscle (57.83%), and values for a cloak and an adductor differ slightly (55.81 and 55.96%). Taurine content in food parts of a mollusk Anadara broughtoni is rather high compared to with other bivalve mollusks of the Far East region. Muscle tissue has maximal content of taurine (569.3 +/- 28.2 mg/100 g wet tissue), adductor occupies an intermediate position (387.9 +/- 18.2 mg/100 g wet tissue) and the minimum content of this amino acid is characteristic for mantle (297.1 +/- 13.4 mg/100 g wet tissue).