The ecology of environment nowadays

ELECTROREGENERATION OF Ni (II) -LOADED

ION-EXCHANGE RESINS

Yu. Dzyazko, V. Belyakov

Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Palladin avenue 32-34, 03680 Kiev, Ukraine

Regeneration of Ni (II) loaded ion-exchange resins by electrodialysis was investigated. Dowex MSC-1, Dowex HCR-S, Purolite C100 E, КU-2-8, Dowex MAC-3 cation-exchange resins were used. The compartment containing the ion-exchanger was separated from the cathode and anode compartments with a cation- and anion-selective membrane respectively. Both the cathode and anode compartments were fill Continue Reading »

Gas chromatography on the modifications

of Y-type zeolite with binding clay

O.S. Banach, I.M. Zybak, V.I. Rohovyk, A.F. Mynka

Danylo Halytskyi State Medical University, Lviv, Ukraine

Industrially produced Y-type zeolites have spherical or cylindrical shape and contain binding additions increasing their mechanical strength. Such adsorbents are used for effective dehydratation of gases and liquids and also as fillers in gas chromatography. Exchanging initial ions in zeolite by other cations allows to change substantially their absorbing properties and to obtain cation modifications with desirable ch Continue Reading »

THIN-LAYER AND GAS CHROMATOGRAPHY AS METHODS

TO DETERMINE REACTION PROGRESS OF MICROBIAL OXIDATIONS OF STEROID SUBSTRATES

E. Brzezowska

Agricultural University, Norwida 25, 50-375 Wrocław, Poland

The microbial transformation is often applied in organic synthesis because it is an inexpensive and convenient method, that could repleaced chemical synthesis. Enzymes can catalyse avariety of reactions on steroids (reduction, degradation, isomerisation, oxidation) [1].

Sclerophoma pythiophila is saprophytic fungus which commonly occurs on trees. It was used as a bioreagent to transformate steroid s Continue Reading »

SURFACE PHENOMENA IN FOOD DISPERSE SYSTEMS

T.O. Didorenko, G.N. Gordiychyk, V.N. Tischenko

Odessa State Academy of Food Industry, Kanatnaya st. 112, 65039 Odessa, Ukraine e - mail profAIK@ipss.net

The majority of foodstuff, is a composite polydisperse system, in which the dispersed phase is both in ionic – molecular state, and as particles of colloidal dispersion degree. It is impossible to define rigorous line between dispersed phases, as water solutions of some substances are a dispersion medium for other substances. Any changes in the content and state of constituents can give lead to destruction of all equi Continue Reading »

MODIFIED LANGMUIR ISOTHERM FOR DESCRIPTION OF GAS ADSORPTION ISOTHERMS ON ACTIVE CARBON

L. Czepirski1, M.R. Balys1, V.V. Kutarov2

1University of Mining and Metallurgy, Faculty of Fuels and Energy,

al. Mickiewicza 30, 30-059 Cracow, Poland

2Physical Research Institute, Odessa Mechnikov National University,

Pastera st. 27, Odessa 270026, Ukraine

High – pressure adsorption under equilibrium conditions when both pressure and temperature are higher than the critical, is sometimes referred to as supercritical adsorption. Research interest in this field has been promoted both by theor Continue Reading »

SURFACE PROCESSES AT THE MEMBRANE SCALING

I. Atamanenko, A. Kryvoruchko, L. Yurlova, B. Kornilovich

Institute of Colloid Chemistry and Chemistry of Water, Ukrainian National Academy of Sciences, Vernadsky avenue 42, 03142 Kiev, Ukraine

The effect of inhibitor addition on the calcium sulphate crystallization process has been studied by the differential scanning calorimetry method (DSC). Starting from CaSO4 concentration of 1.7 g/l, alongside with the main peak corresponding to its homogeneous solution at a temperature of 270 K there appears one more water peak in the DSC thermograms. It is likely due to the crys Continue Reading »