A Property of Purely Hyperbolic Fuchsian Groups of the Second Kind

Let G be a purely hyperbolic, finitely generated, nonelementary Fuchsian group of the second kind. If is the limit set of the group G, then the function belongs to the class BMO. This follows from the fact that is porous, proved in the paper. Bibliography: 4 titles.     

Thermodynamic and functional properties of legumin (11S globulin from Vicia faba) in the presence of small-molecule surfactants: effect of temperature and pH

We report on the effect of a set of water-dispersible small-molecule surfactants (the main and the longest-hydrocarbon components of which are a citric acid ester of monostearate, a sodium salt of stearol-lactoyl lactic acid, and a polyglycerol ester of stearic acid) on molecular, thermodynamic, and functional properties of the major storage protein of broad beans (Vicia faba) legumin in different molecular states (native, heated, and acid-denatured). The interaction between legumin and the surfactants has been characterized by a combination of thermodynamic methods, namely, mixing calorimetry and multiangle laser static and dynamic light scattering. It was found that hydrogen bonds, electrostatic interactions, and hydrophobic contacts provided a basis for the interactions between the surfactants and both the native and the denatured protein in aqueous medium. Intensive association of the protein molecules in a bulk aqueous medium in the presence of the surfactants was revealed by static and dynamic laser light scattering. In consequence of this, both the surface activity and the gel-forming ability of legumin increased markedly, which has been shown by tensiometry, estimation of protein foaming capacity, and steady-state viscometry. A likely molecular mechanism underlying the effects of small-molecule surfactants on legumin structure-forming properties at the interface and in a bulk aqueous medium is discussed.     

On continuous noncomplete lattices

We consider noncomplete continuous and algebraic lattices and prove that finitely generated free lattices are algebraic. We also study the Lawson topology, the second most important topology in the theory of continuous domains, on finitely presented lattices. In particular, we prove that algebraic finitely presented lattices are linked bicontinuous and the Lawson topology on these lattices coincides with the interval topology. Several examples of non-distributive and noncomplete algebraic and continuous lattices are given in the paper. Received April 5, 2000; accepted in final form December 12, 2000.     

Trends in the science and applications of pectins

The literature on the chemistry and application of pectins is reviewed. The principal themes are the search for nontraditional sources of pectins with novel structural elements and the deeper understanding of the structure and physicochemical properties of well studied pectins from traditional sources (apple, beet, citrus). Custom preparation of pectins with a desired set of properties that have practical application in medicine, biology and the food industry has been demonstrated. Chemical modification of pectins is a promising trend.Institute of Polymer Chemistry and Physics, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (998-71)-144-26-61. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 3–11, January–February, 2000.     

Cross-section of the production of tritium in interactions of neutrons with 10B nuclei

Tritium production reactions are important from the standpoint of ensuring the safe operation of nuclear power plants. ¹⁰B isotopes are widely used both for controlling the power level of nuclear reactors and for shielding against thermal neutrons. The main process with ¹⁰B that results in the production of tritium is ¹⁰B(n, αt)⁴He. The gaseous target technique developed at the Institute for Physics and Power Engineering allows the energy of all charged reaction products to be totally absorbed and thus useful events to be easily discriminated from the background.     

Holographic Study of the Response of HeLa Cells to Photodynamic Treatment with Endogenously Generated Protoporphyrin IX

Optics and Spectroscopy - Changes in morphological and optical parameters of HeLa cells preincubated with 5-aminolevulinic acid (5-ALA), after photodynamic treatment (PDTr) with different intensity...     

Effect of modification of granulated activated carbons with ozone on their properties

Modification of AG-OV-1 activated carbon with an ozone-oxygen mixture was studied. Changes in the porosity, state of the surface, and adsorption capacity of ozonized samples were examined in relation to the oxidation duration. Explanation are suggested for the patterns obtained.     

Nickel(II) complexes with 2-hydroxyethyliminodioacetic acid in aqueous solutions of dicarboxylic acids

The equilibria in binary and ternary systems containing a nickel(II) salt, 2-hydroxyethyliminodiacetic acid, and dicarboxylates were studied by spectrophotometric and potentiometric methods with NaClO₄ as the supporting electrolyte at I = 0.1 and T = 20 ± 2°C. The molar and protic composition and the pH regions of existence of the complexes were determined, the stability constants of complexes containing the same or different ligands were determined. The fractional distribution of the complexes as the function of acidity was elucidated. The experimental data were treated using mathematical models to estimate the possibility of existence of a broad range of complex species in solution and to distinguish the species that are sufficient to take into account for reproducing the experimental results.