Phosphorus compounds in callus tissue of Nicotiana tabacum L. treated with morphactins IT 3233 and IT 3456

The morphactins under examination blocked the growth of tobacco callus tis-sues at as low concentrations as l mg/dm3 (IT 3456) and 10 mg/dm3 (IT 3233). The growth inhibition was accompanied by an increase in dry matter content. An increment in total P level induced by morphactins was the result of inorganic P accumulation. It could be supposed that the compounds tested influence the permeability of plasma membranes. No direct relationship his been found between the action of morphactins on growth and the level of phosphorus compounds in tissues. It seems that both the morphactins have a little different mode of action

Оцінка оновлення основних засобів за рахунок позикових коштів

Оновлення основних засобів є актуальною проблемою сьогодення. Для багатьох підприємств кредити банків є чи не єдиним джерелом коштів на модернізацію виробничих потужностей. В даній статті нами були розглянуті можливості і перспективи приватних фірм для використання з цією метою позикових засобів, оцінений ступінь прозорості банківських установ, річні ставки за інвестиційними кредитами та інші умови їхнього надання.Modernizing of the basic assets is a topical problem of the present. For many business firms bank loans are may be the only source of funds for renewal of production facilities. In the article we have considered the opportunities and prospects for use of borrowed funds by private firms for this purpose, rated the degree of transparency of banking institutions, the annual rates of investment credits and other conditions of their granting

Surface Analysis Of The Nanocrystalline Fe-Based Alloys By Conversion Electron Mossbauer Spectroscopy

ABSTRACTA combined conversion electron and γ-transmission Mössbauer spectroscopy is applied to investigate the differences in the surface and bulk crystallization of the amorphous Fe-M-B-Cu (M: Zr, Ti, Nb, Ta) alloys. It is shown that the surface crystallization occurs at an annealing temperature lower than in the bulk. The nanocrystalline bcc Fe phase is significantly more abundant at the surface than in the bulk in the entire annealing temperature range.</jats:p

Influence of The Alloy Composition on The Magnetic Properties of Nanocrystalline Fe₈₀M₇B₁₂Cu₁ (M: Ti, Ta, Nb, Mo)

ABSTRACTFormation of the nanocrystalline bcc Fe phase due to thermal treatment of the amorphous Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo) precursors is studied by the Mössbauer and differential scanning calorimetry techniques. The dependence of the formation of the bcc Fe phase on the alloy composition is discussed. In order to determine the optimal soft magnetic properties of these nanocrystalline alloys the rf-Mössbauer technique is used in which rf collapse effect induced by a radio-frequency (rf) magnetic field is employed. It was found that anisotropy fields in the nanocrystalline phase were smaller in Nb- and Mo-containing alloys as compared to the alloys which contain Ti or Ta. Variations of the anisotropy field vs. alloy composition and annealing temperature are discussed in detail.</jats:p

Rf-Mössbauer Study of the Compositional Dependence of Short Range Order in Amorphous Fe-M-B-Cu Alloys

ABSTRACTThe radio-frequency collapse of the magnetic hyperfine structure in the Mössbauer spectra is employed to study directly the short range order in amorphous Fe-M-B-Cu (M: Zr, Ti, Ta, Nb, Mo) alloys via the electric quadrupole hyperfine interaction. The shape of the quadrupole splitting distributions obtained from the rf collapsed spectra strongly suggests the existence of two short range orders with a high and low local content of iron. The decrease of boron content in FeZrB alloys leads to a more symmetric local structure experienced by Fe atoms.</jats:p

Phosphorus compounds in callus tissue of Nicotiana tabacum L. treated with morphactins IT 3233 and IT 3456

The morphactins under examination blocked the growth of tobacco callus tis-sues at as low concentrations as l mg/dm3 (IT 3456) and 10 mg/dm3 (IT 3233). The growth inhibition was accompanied by an increase in dry matter content. An increment in total P level induced by morphactins was the result of inorganic P accumulation. It could be supposed that the compounds tested influence the permeability of plasma membranes. No direct relationship his been found between the action of morphactins on growth and the level of phosphorus compounds in tissues. It seems that both the morphactins have a little different mode of action