Phenolic complex in roots and root nodules of cultivars Ramonsky 77, Torsdag, and its non-nodulating K1005m was studied. The obtained results, demonstrating the connection of phenolic metabolism and symbiosis activity, indicate the involvement of phenolic compounds not only in regulation of early stages of nodulation, but in symbiosis as a whole.
The respiratory enzyme (NAD and NADP-dependent isocitrate dehydrogenases and malic enzymes, NAD-MDG, NADP-glucose-6-phosphate dehydrogenase, pyruvate kinase anf PEP-carboxylase) were studied in extracts of cell cultures (mitochondria, nuclei) and in cytoplasmic fraction of pea leaves. It has been established that the activity of all the enzymes in the objects studied (M-2004, Torsdag
Parameters oif biological productivity, photosynthetic characteristics (RuBisCo and GAP activity, CO2 uptake, O2 release), content of some metabolites (amino acids, organic acids, starch and sugars) and the mesostructure of pea ( Pisum sativum L.) leaves of Torsdag variety, its isogenic mutants with respect to chlorophyll deficiency (2004 and 2014) and hybrids (TxM-2004 and M-2004xT) have been studied. It has been established that the seed productivity of pea is directly correlated (r > 0.93) with the maximal photosynthesis, oxygen release rate, photosynthesis of a single chloroplast, and mobilization index. It is concluded that high values of photosynthetic characcteristics not always result in high seed productivity of pea plants.
The flavonoid and iridoid content of S.umbrosa from Novosibirsk region, Ulagan district of the Altai Republic and cultivated in vitro has been studied. S. umbrosa is considered rare relic in Siberia. The age peculiarities and the mode of chemical substances accumulation in some organs were taken into account. The flavonoid accumulation in the plant organs fluctuated within the limits of 0.1 to 1.2 percent of air dry weight. The maximum values of the flavonoid content were registered in mature plant leaves, especially in the samples from Novosibirsk region. The amount of iridoids was 4.4
Results of studies of flavonoids content of leaves of hawthorn affected by powdery mildue are presented. It has been noted that at the initial stage of affection, a response reaction is induced: the flavonoid content is increased, especially in the leave tissues adjacent to the site of invasion. Exogenous introduction of flavonoids decreases the frequency of development of powdery mildew.
The formation and development of coherent vortical structures at the late stages of the laminar-turbulent transition initiated by a harmonic, almost two-dimensional Tollmien – Schlichting (TS) wave in a self-similar boundary layer with Hartree parameter βH=
Investigation results of a linear and nonlinear development of the travelling secondary disturbances on streamwise structures in a swept wing boundary layer are presented, and peculiarities of a laminar-turbulent transition at a nonlinear development regime of the travelling disturbances are reported.
The evolution of natural disturbances in a flat-plate boundary layer is experimentally studied for a Mach number M = 2. To obtain a more detailed pattern of transition in the boundary layer, the measurements are performed both in the longitudinal and normal coordinates. The development of oscillations is analyzed using a statistical approach. It is found that the growth of natural oscillations is linear up to a Reynolds number Reδ = 1100. The amplitude of oscillations at the final stage of linear development of disturbances is approximately 4 %.
An analogy was established between the streamlining of blades in the Darrieus wind turbine and unsteady flow around a flapping wing. New results were established for Darrieus turbine: possibility of self-start, and new efficient method for aerodynamic limitation of rotation speed.
