oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Search Results: 1 - 10 of 3640 matches for " Tatiana; "
All listed articles are free for downloading (OA Articles)
Page 1 /3640
Display every page Item
Protein phase instability developed in plasma of sick patients: clinical observations and model experiments  [PDF]
Tatiana Yakhno
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.23034
Abstract: This article discusses the causes of formation of micron-size protein structures in liquid plasma or serum of the patients with different diseases, which are accompanied by inflammatory reac-tions. Self-organizing processes in sessile dry-ing drops of natural and model biological liq-uids are used for study of possible mechanisms of development the protein phase instability in serum. There was shown that violation of opti-mal ratio between albumin and osmotic active components could lead to loss of albumin ag-gregative stability and albumin coagulation structures formation. Possible role of these structures in pathogenesis of inflammation is discussed.
Eating disorders, body image, and dichotomous thinking among Japanese and Russian college women  [PDF]
Atsushi Oshio, Tatiana Meshkova
Health (Health) , 2012, DOI: 10.4236/health.2012.47062
Abstract: This study explored cross-cultural differences between Japan and Russia in terms of women’s body images, proneness to eating disorders, and the effects of dichotomous thinking. Participants included 419 Japanese and 187 Russian college women who completed the Dichotomous Thinking Inventory (DTI), the 26-item version of the Eating Attitudes Test, and responses regarding nine figures representing female body shapes. The mean age of the participants was 19.8 years, with no significant age differences between the countries. The results showed that Japanese women have leaner ideal body images than Russian women, whereas there were no cross-cultural differences in the participants’ real body images. DTI scores among Russian participants were higher than DTI scores among Japanese participants, which indicated that Russian women think more dichotomously than Japanese. Structural equation modeling indicated a significantly negative effect of dichotomous thinking only on real body image in Russia; the ideal body image had greater effects on eating disorder in Russia than in Japan.
Functional Acrylic Polymer as Corrosion Inhibitor of Carbon Steel in Autoclaved Air-Foamed Sodium Silicate-Activated Calcium Aluminate/Class F Fly Ash Cement  [PDF]
Toshifumi Sugama, Tatiana Pyatina
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.511109
Abstract:

The study focused on investigating the effectiveness of functional acrylic polymer (AP) in improving the ability of airfoamed sodium silicate-activated calcium aluminate/Class F fly ash cement (slurry density of 1.3 g/cm3) to mitigate the corrosion of carbon steel (CS) after exposure to hydrothermal environment at 200?C or 300?C. Hydrothermally-initiated interactions between the AP and cement generated the formation of Ca-, Al-, or Na-complexed carboxylate derivatives that improved the AP’s hydrothermal stability. A porous microstructure comprising numerous defect-free, evenly distributed, discrete voids formed in the presence of this hydrothermally stable AP, resulting in the increase in compresive strength of cement. The foamed cement with advanced properties conferred by AP greatly protected the CS against brine-caused corrosion. Four major factors governed this protection by AP-incorporated foamed cements: 1) Reducing the extents of infiltration and transportation of corrosive electrolytes through the cement layer deposited on the underlying CS surface; 2) Inhibiting the cathodic reactions at the corrosion site of CS; 3) Extending the coverage of CS by the cement; and 4) Improving the adherence of the cement to CS surface.

Toughness Improvement of Geothermal Well Cement at up to 300°C: Using Carbon Microfiber  [PDF]
Toshifumi Sugama, Tatiana Pyatina
Open Journal of Composite Materials (OJCM) , 2014, DOI: 10.4236/ojcm.2014.44020
Abstract: This study aimed at assessing the usefulness of carbon microfiber (CMF) in improving the compressive-toughness of sodium metasilicate-activated calcium aluminate/Class F fly ash foamed cement at hydrothermal temperatures of up to 300°C. When the CMFs came in contact with a pore solution of cement, their surfaces underwent alkali-caused oxidation, leading to the formation of metal (Na, Ca, Al)-complexed carboxylate groups. The extent of this oxidation was enhanced by the temperature increase, corresponding to the incorporation of more oxidation derivatives at higher temperatures. Although micro-probe examinations did not show any defects in the fibers, the enhanced oxidation engendered shrinkage of the interlayer spacing between the C-basal planes in CMFs, and a decline in their thermal stability. On the other hand, the complexed carboxylate groups present on the surfaces of oxidized fibers played a pivotal role in improving the adherence of fibers to the cement matrix. Such fiber/cement interfacial bonds contributed significantly to the excellent bridging effect of fibers, resistance to the cracks development and propagation, and to improvement of the post-crack material ductility. Consequently, the compressive toughness of the 85°-, 200°-, and 300°C-autoclaved foamed cements reinforced with 10 wt% CMF was 2.4-, 2.9-, and 3.1-fold higher than for cement without the reinforcement.
Polyphosphatase PPX1 of Saccharomyces cerevisiae as a Tool for Polyphosphate Assay  [PDF]
Lidiya Lichko, Tatiana Kulakovskaya
Advances in Enzyme Research (AER) , 2015, DOI: 10.4236/aer.2015.34010
Abstract: The recombinant exopolyphosphatase PPX1 with a specific activity of ~300 U/mg protein was purified from the strain of Saccharomyces cerevisiae with the inactivated PPN1 gene transformed by the expression vector carrying the yeast PPX1 gene. The recombinant PPX1 was similar to the PPX1 of wild strains in its substrate specificity and requirement for cations. PPX1 had the high substrate specificity to polyphosphates. The preparation was suitable for polyphosphate assay in the presence of orthophosphate and nucleoside phosphates not hydrolyzed by PPX1. The yield of the enzyme preparation was 250 assays per 1 g of the biomass. The recombinant PPX1 was successfully used in polyphosphate assay in different yeast species and some foodstuffs.
One-Pot Three-Component Synthesis of N-Arylmethyl-4-(7-cyclohepta-1,3,5-trienyl)anilines  [PDF]
Lidia P. Yunnikova, Tatiana A. Akentieva, Tatiana V. Makhova
International Journal of Organic Chemistry (IJOC) , 2013, DOI: 10.4236/ijoc.2013.32017
Abstract:

We report a one-pot three-component synthesis of N-arylmethyl-4-(7-cyclohepta-1,3,5-trienyl)anilines by using various aromatic imines, tropylium tetrafluoroborate, and sodium tetrahydroborate in the presence of imidazole as activator.

Thermodynamic Properties of Li-LiH (LiD, LiT) Systems. The Phase Diagram  [PDF]
Konstantin A. Yakimovich, Tatiana Biryukova
Open Journal of Physical Chemistry (OJPC) , 2012, DOI: 10.4236/ojpc.2012.23019
Abstract: The paper presents a comprehensive critical review and detailed analysis of the literature, published in the field of the phase diagram solution Li-LiH (LiD, LiT). Special attention is paid to the completeness of the source information on the paper’s topic resulting in an extended reference list. Particularly, paper reviews rarely used sources including little-known publications from research centers, proceedings of the international scientific meetings and dissertations. These publications were more thoroughly analyzed in order to make the information available to the scientific society.
Entre Napoleón y Jesucristo: las peripecias del "alma rusa" en la obra de Dostoievski
Bubnova, Tatiana;
Bakhtiniana: Revista de Estudos do Discurso , 2011, DOI: 10.1590/S2176-45732011000200014
Abstract: this is an analysis of the two components of the "russian soul" highlighted in the dostoevsky's novels: napoleonism and christology. the origins of both of them can be found in the western history and civilization. there is a certain paradox in the fact that the evolution of these two lines in the oeuvre of the great russian writer arrives to an approach of the two types, the napoleonic one and that of the follower of christ, especially in the idiot. a revision of the "russian soul" under the light of the most recent interpretations of russian critics discovers new intertexts and opens dostoevsky's text to a renewed identity dialogue. this paper is influenced by bakhtin's philosophical anthropology and philosophy of language.
Distribución latitudinal de foraminíferos bentónicos (Protozoa: Foraminiferida) a nivel de subórdenes y familias, en canales y fiordos patagónicos chilenos
Hromic,Tatiana;
Investigaciones marinas , 2006, DOI: 10.4067/S0717-71782006000100006
Abstract: the latitudinal distribution of benthic foraminifers is studied at the levels of suborder and family. 106 samples were collected on the continental shelf (50-300 m) between 43os and 55os in the area of channels and fjords, eastern south pacific, during cimar fiordos expeditions 2, 3, 7 and 8. the foraminifers (50,480 specimens) were classified in 5 suborders, 46 families and 228 species. the number of suborders, families, and the families by suborder do not depend on the latitudinal gradient. likewise, abundance at the suborder and family levels does not fluctuate with latitude. a major change was observed at 44os (baeza and memory channels), where the number and abundance of suborders and families, species richness, and diversity decreased drastically. the same occurred between 46o and 48o s (steffen and mitchell estuaries and escape channel). this may suggest that local events, such as oceanic currents, could be more important than latitude in controlling microfauna distribution patterns
Rússia: o que vivenciou e o que tem pela frente?
Zaslavskaia, Tatiana;
Estudos Avan?ados , 2003, DOI: 10.1590/S0103-40142003000300023
Abstract: the article is a written version of the exposition done by the autor in 2003, in a round table organized within the symposium whiter russia?, that takes place annually under the auspices of the moscow school of social and economic studies. in the article she disputes with vladimir mau, a political scientist, now rector of the referred school, about the results of the russian systemic transformation of the 90's and suggests, on the basis of these results, a different path for the future development of the country.
Page 1 /3640
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.