Luminescence of Agrotextiles Based on Red-Light-Emitting Organic Luminophore and Polypropylene Spunbond Enhances the Growth and Photosynthesis of Vegetable Plants.

The impact of a light-transforming covering on photosynthetic activity and growth processes in lettuce and white cabbage plants grown in a glass greenhouse was studied. Plants were covered with agrotextile, a polypropylene (PP) nonwoven spunbond coated with polylactide varnish containing a new organic luminophore (LUM), which absorbs sunlight mainly in the 460-560 nm region and efficiently reradiates it in the red spectral region with a maximum at 660 nm. For comparison, simultaneously two references agrotextiles without LUM or containing a non-luminescent chromophore (ABS) with an absorption spectrum close to that of LUM were as well investigated.

Influence of photoluminophore-modified agro textile spunbond on growth and photosynthesis of cabbage and lettuce plants.

Light-converting polypropylene spunbond was first used in the study of the key physiological parameters of plants. A comparative study of the functioning of the photosynthetic apparatus and the dynamics of growth in late cabbage plants (Olga variety) and leaf lettuce (Emerald variety) was conducted using the ordinary nonwoven polypropylene fabric (spunbond) (density 30 g·m) and the spunbond containing a photoluminophore (PL) (1.6% yttrium oxysulfide doped with europium).

Effect of sunlight transformed by luminophore-containing materials on cell functions in vitro and in vivo.

Effect of sunlight transformed by luminophore-containing materials on cell viability and functional state of the retina was assessed using the photodamage model. Exposure to the luminescent component of light improved viability of NIH 3T3 cells and promoted recovery of electric activity in rabbit retina after photodamage.

[The strategy of the "useful sun" improves physical endurance and structural adaptation in the myocardium].

The action of solar light transformed by special screens has been studied on CD-1 male mice. In the active control group, mice were irradiated through screens absorbing the UV-component. In the experimental group, screens transforming the UV-component into the orange-red light were used.

[Photon radiation-induced structural and functional changes in the myocardium of hypertensive SHR rats].

Male rats were irradiated by a Korobkov photon light-emitting diode matrix with a maximum irradiation at 612 nm every day 1 h per day for 13 days. After a course of irradiation, the rhythmoinotropic characteristics of the cardiac muscle significantly improved. Exposure to photon radiation initiated an active rearrangement in myocytes as shown by a morphological analysis.

[Orange-red light reduces the inhibition by UV-A of the proliferation of rat fibroblasts and influences their attachment in a dose-dependent fashion].

The effects of ultraviolet-A (UV-A, lambdam = 365 nm) and orange-red light (lambdam = 625 nm) on the attachment and proliferation of embryonic skin-muscle rat fibroblasts were investigated. It was found that orange-red light (ORL) produces both the stimulatory and inhibitory actions on the attachment and proliferation of fibroblasts, whereas UV-A radiation caused only the inhibition of the processes. Upon consecutive irradiation in both variants: ORL --> UV and UV --> ORL, the synergistic effect of the inhibitory action in both spectral regions was observed.

Hypothalamic effects of millimeter wave irradiation depend on location of exposed acupuncture zones in unanesthetized rabbits.

On nine unanesthetized male rabbits, the frequency spectra of hypothalamic electrogram (EEG) were studied during low intensity (10 mW/cm2) millimeter wave (55-75 GHz) exposure to various acupuncture points (zone): auricular, cranial and corporal. The chances of occurrence of significant (p < 0.05) changes in the EEG spectra during irradiation versus, sham experiments were equal to 31, 21 and 5%, respectively.

[Degranulation of skin mast cells caused by high frequency electromagnetic irradiation of low intensity].

It was shown by light and electron microscopy that local exposure of the projection of the MC-8 lao-gun acupuncture point in rat pad to low-intensity (0.05 mW/cm2) extremely high-frequency (42.0 GHz) electromagnetic radiation caused a degranulation of derma mast cells.

[The simulation of the cooperative effect of development in a culture of early mouse embryos after irradiation with electromagnetic waves in the millimeter range].

We have found that two-cell mouse embryos cultured in vitro can be stimulated by electromagnetic irradiation in the millimeter range. After 30 min of exposure, they acquire the ability to develop in culture on their own and can reach the stage of blastocyst in a relatively large volume of Whitten cultural medium (150 microliters) without serum or growth factors. It is proposed that millimeter range electromagnetic waves activate metabolic processes and specifically the synthesis of factors controlling early embryonic development in culture.

[Effect of millimeter waves on the early development of the mouse and sea urchin embryo].

The action of nonthermal electromagnetic radiation (EMR) of the millimeter range on the early development of murine and sea urchin embryos was investigated. An MRTA-01E-03 generator with a frequency of 54-78 GHz and radiation intensity of 0.06 mWt/cm2 was used.

[The electrical activity of the hypothalamus in exposure to millimeter-wave radiation at biologically active points].

In chronic experiments on awake rabbits, the exposure of the auricular "heart" point (after F. G. Portnov) by nonthermal local millimeter wave irradiation (55-76 GHz range) yielded a significant suppression of hypothalamic electrical activity at 5 and 16 Hz and enhancement at 7-8, 12 and 26 Hz.

Millimeter-wave effects on electric activity of crayfish stretch receptors.

The effects of super high frequency (SHF) microwaves (34-78 GHz) on rates of spontaneous firing of the slowly adapting, stretch-receptor neurons of crayfish were studied. Initially, irradiation of continuously perfused, fluid-cooled preparations at power densities to 250 mW/cm2 caused a transient decrease in the rate of spontaneous firing (the dynamic response). Subsequently, with extinction of the SHF field, the rate of firing increased, finally stabilizing at pre-exposure levels (stationary phase).

[Sharp increase in refractory period induced by oxidation suppression in Fitz Hugh-Nagumo model. New mechanism of antiarrhythmic drug action].

A change in fast inward and slow outward currents and their time constants was simulated in Fitz Hugh-Nagumo model. A decrease in fast inward current was shown to increase the refractory period. The same result was observed when the slow current was increased or its time constant was decreased.

[Impulse circulation in an excitable medium. Critical size of the closed circuit].

Periodical regimes of impulse circulation are studied for the system of two differential equations Exixi-vE-F(E)-g=0, vg=epsilon(phi(E)-g),(epsilon less than 1), which describes stationary propagation of the impulse with the velocity upsilon. Analytical expressions are obtained for the minimal size of the closed circuit (lambdamin) and minimal circulation velocity (upsilonmin). It has been found that when the circuit size was close to lambdamin, the impulse became relaxed; it means that the plateau lenght was close to the front length.

[Relationship between ionic membrane currents and stationary rates of stable and unstable spike propagation].

Pulse propagation in a model of excitable fibre is analyzed. Fibre membrane is described by a nonlinear system of 2 differential equations with small parameter (reduced system of the Hodgkin--Huxley type [1]). Both fast and slow ionic currents of excitable membrane are incorporated into the model.