[Effectiveness of the use of iodized milk protein to improve girls' sufficiency with iodine].

The work presents the results of the research capabilities of the use of iodized milk protein as a component of food supplement and enriched food product for the correction of iodine sufficiency in girls. Milk iodinated protein was produced by the enzyme-effective iodization of amino acid residues of cow's milk whey proteins. The study involved 30 girls, whose average age was 19.9 +/- 1.4 years. Participants of observation were divided into three groups, for 10 people each. The first group received daily serving of meat cutlets (50g), enriched with dairy iodinated protein. Iodine content in the finished minced was 100 mcg. The second group received iodinated milk protein in the form of food supplement with iodine content of 100 mcg. The third group was a control one. The duration of observations was 30 days. To assess the effectiveness of measures the concentration of iodine in urine, blood levels of thyroid-stimulating hormone and free thyroxine have been determined, changes in cognitive processes (memory and attention) with the use of psychological tests have been evaluated. Studies have shown the effectiveness of using of iodized milk protein for the correction of iodine deficiency in girls. The use of iodized protein, as part of the enriched product and in the form of food supplement increased urinary iodine level and had a positive influence on the state of the hypophysial-thyroid system. In addition, the use of iodized milk protein helped to improve the cognitive functions of the students, which can be considered as an additional positive effect of correction of iodine deficiency.

[Relationship of some environmental factors to disorders in wheat ontogenesis as applied to space greenhouse]. / Sviaz' nekotorykh faktorov vneshnei sredy s narusheniiami v ontogeneze rastenii pshenitsy primenitel'no k usloviiam kosmicheskoi oranzherei.

In ground-based experiments reproducing conditions in experiments in the Mir greenhouse Svet super dwarf wheat was raised at water potential (WP) in root modules with pearlite within the range from -0.5 kPa to -3.0 kPa. At -2.0 kPa the number of florets in spikes, mainly the tiller ones, was considerably reduced and the actual spikes were fully barren. With WP equal to 0.5 kPa and -1.0 kPa, the grain component in the mass of a completely ripe shoot made up 46% and only 32% with WP at -2.0 kPa. With WP = 3.0 kPa, spikes of the main shoot and tillers were fully barren. In the WP range from 0.5 kPa to 1.0 kPa plants developed two tillers and no more than one tiller at 3.0 kPa. In the experiment with elevated air temperature mass of tillers at 1.0 kPa was by 39% lower as compared to the data from the experiment at the normal temperature. Degenerated anthers and abnormal pollen grains were again the cause of full barrenness of spikes grown at the normal temperature.

[The influence of the water potential in the root-habitable area on the efficiency of the higher-order plants]. / Vliianie vodnogo potentsiala v korneobitaemoi zone na produktivnost' vysshikh rastenii.

In a set of 8 experiments, in leaf mustard Brassica junceae L. (cult. Volnushka) and in soft wheat Triticum aestivum L. (cult. Super Dwarf) there has been studied dynamics of accumulating biomass in the ontogenesis in accordance with the value of water potential in the root-habitable medium. Besides, in wheat there has been investigated the process of forming the grain crop capacity in a period between V and XII stages of the organogenesis from Kuperman's classification. The plants have been grown in the root modules with the perlite used as a substitute for soil and with water supply through the porous hydrophilic membranes. The levels of water potential in the root-habitable medium, namely in the perlite, were kept unchanged in the range from -0.5 to -13 kPa (or from -5 to -130 cm water column) which corresponded to volumetric humidity ranged from 63 to 25%. Tests exposition was in the range of 13 to 78 and 25 to 46 days for wheat and mustard, respectively. The value of upper limit of an allowable water potential was determined from the magnitude of critical pressure of the puncture at which the most large through pores in the perlite layer break free of water, the value of lower limit was determined after criterion of a significant decrease in the plants harvest. In accordance with the paper results an allowable range of water potential in a perlite-based root-habitable medium ranged from -1.0 to -2.0 kPa which was in agreement with the range of volume humidity from 61% to 51%. In decreasing the water potential beyond the lower limit of mentioned range to -3.0 kPa, the mass of mustard shoots has reduced by 30% and the wheat crop was not good. The elaborated procedure and equipment can be used for determining the thresholds of permissible water potentials (humidity) for any soil substitutes irrespective of the construction of root module and the species of cultivated plants.