Mesoporous silica materials as sensitive components for chemo- and biosensors

Mesoporous silica various morphology have many desirable properties as separation media. There high surface area and uniform porosity make them promising hosts for sensing molecules. Possibility of creation of chemical sensors on the basis of functionalized mesoporous silica materials for selective determination of herbicide was monitored in relation to HRP/2,4-D conjugate.Розглянуто можливості синтезу та застосування мезопористих кремнеземних матеріалів різної морфології як матриць для сенсорів різного призначення. Показано можливість створення біосенсорів для аналітичного визначення гербіцидів на прикладі найбільш поширеного в світі гербіциду 2,4-D.Рассмотрены возможности синтеза и применения мезопористых кремнеземных материалов различной морфологии в качестве элементов сенсоров различного функционального назначения. Показана возможность создания биосенсоров для аналитического определения гербицидов на примере наиболее распространенного в мире гербицида 2,4-D

Self-assembly of Fibres in Alkylcarboxylate—Sodium Silicate Systems

Fibres of macroscopic size (up to 5 cm in length) formed spontaneously in initially homogeneous systems containing alkali metal salts of saturated n-alkylcarboxylic acids and sodium silicate. After drying, these fibres resembled wool or down, with some being in the form of dense strands which laminated into single fibres with time. The minimal thickness of these single fibres was ca. 0.5 mm and, since a dense parallel cluster contained ca. 34 000 micellar strands, the thickness of each fibre plus associated silicate surface layer amounted to ca. 27 Å. It was suggested that the key feature of the self-assembly mechanism is the weak interaction between a surfactant molecule and a silicate leading to the continuous formation of microscopic sized fibres

Method of preparation of magnetic sorbent, based on porous materials with magnetic nanoparticles

<p>S.V.Kolotilov, O.V.Shvets, N.V. Kasian, V.G. Ilyin, V.V. Pavlishchuk., “Method of preparation of magnetic sorbent, based on porous materials with magnetic nanoparticles”, Ukraine Patent 17038 U, № u200601317, 15.09.2006</p

Development of new types of magnetic materials by insertion of ferromagnetic Fe3O4 nanoparticles or heteronuclear complexes of transition metals into silica and coordination porous matrixes

<p>Nanosystems, Nanomaterials, Nanotechnologies</p

Some Compositional Viscosity Correlations for Crude Oils from Russia and Norway

The current work is based on experimental viscosity and compositional data of about 200 crude oil samples from various parts of Russia and the Norwegian continental shelf. Data analyses were performed to estimate correlations between viscosity and density values as well as concentrations of main components from the crude oils of different origins. It appeared that, in some cases, it is possible to establish a general correlation of viscosity increase along with growing asphaltene, resin, and aromatics contents but also a decrease in viscosity with increasing saturates content. The spread of the data points can be rather wide for the oils of different origins. It was observed that asphaltenes from all of the crude oil samples acted as promoters of the viscosity growth at rather low concentrations, while resins and aromatics effectively increased viscosity in a higher concentration range. The effect of asphaltenes on the viscosity of real crude oils seems to be more important than when dissolved in a model solvent (xylene). This means that either the asphaltenes have a different solvation state in crude oils compared to xylene or asphaltenes are not solely responsible for the high viscosity of the crude oils

Method of preparation of active element for sensors for oxidizing and reducing agent, acids based on stable organic radicals, applied on inert supports with internal standart

<p>A.V. Yakovenko, S.V.Kolotilov, O.V.Shvets, N.V. Kasian, V.G. Ilyin, V.V. Pavlishchuk., “Method of preparation of active element for sensors for oxidizing and reducing agent, acids based on stable organic radicals, applied on inert supports with internal standart”, Ukraine Patent 23727 U, № u200612910, 11.06.2007</p

Method of preparation of porous magnetic composite, based on porous materials with homo- and heterometallic nanoparticles of 3d oxides by thermal and microvave decomposition of polynuclear complexes in solutions with high boiling temperature

<p>patent</p