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Sample records for gazovoj faze kvantovo-khimicheskoe

  1. [Physiological changes in the morphology of the main structural enamel unit - hydroxyapatite crystal - during its life span (in vitro study)].

    PubMed

    Shumilovich, B R; Sadovsky, V V; Sushchenko, A V; Kharitonov, Yu M

    2015-01-01

    The in vitro study by means of complex laboratory techniques including X-ray faze analysis, infrared spectroscopy, scanning electron and atomic force microscopy defined age-related physiological mineralization process as a shift of the structural enamel unit - nanocrystalline hydroxyapatite crystals - TO microcrystal phase. Relevant anatomical sites with age-dependent enamel optical characteristics corresponding to certain ratio of hydroxyapatite phases and the compliance of their color characteristics to composites enamel layers were revealed.

  2. Christmas stockings hanging in the Node 1 hatch

    NASA Image and Video Library

    2012-12-25

    ISS034-E-010298 (25 Dec. 2012) --- Stockings were obviously hung with care on Christmas Day aboard the International Space Station, but for some reason, the fireplace stand-in on Unity couldn't support a real fire. This minor detail didn't faze the spirit of the recently reunited crew members, however. The individual names of the six Expedition 34 crew members are inscribed on their respective stockings. The scene is actually in Node 1, called Unity, which was the first U.S.-built element of the International Space Station that was launched, and it connects the U.S. and Russian segments of the orbital outpost.

  3. Expedition 34 Christmas stockings at the Node 1 hatch

    NASA Image and Video Library

    2012-12-25

    ISS034-E-009737 (25 Dec. 2012) --- Stockings were obviously hung with care on Christmas Day aboard the International Space Station, but for some reason, the fireplace stand-in on Unity couldn't support a real fire. This minor detail didn't faze the spirit of the recently reunited crew members, however. The individual names of the six Expedition 34 crew members are inscribed on their respective stockings. The scene is actually in Node 1, called Unity, which was the first U.S.-built element of the International Space Station that was launched, and it connects the U.S. and Russian segments of the orbital outpost.

  4. Thermal and galvanomagnetic properties of monocrystals CuInGa{sub 2}Te{sub 5}

    SciTech Connect

    Abilov, Ch. I. Hasanova, M. Sh. Huseynova, N. T.; Zeynalov, S. A.

    2016-03-25

    By the methods of the physic-chemical analysis, determination of density and by measurement of micro hardness the character of chemical interaction in the In{sub 2}Te{sub 3}-Cu{sub 2}Ga{sub 4}Te{sub 7} system has been investigated and its faze diagram has been plotted. It is established that the system is quasibinary, of eutectic type. In the system the chemical combination of CuGa{sub 2}InTe{sub 5} composition melting congruently at 855°C is generated. There have been revealed solid solutions boundary of which based on In{sub 2}Te{sub 3} reach 5mol% at room temperatures. Temperature dependences of electric conductivity, the coefficient of thermo-emf, general heat conductivity, the Hall mobility of charge carriers.The mechanisms of electron-phonon diffusion in crystals of its compound have been revealed.

  5. Thermal and galvanomagnetic properties of monocrystals CuInGa2Te5

    NASA Astrophysics Data System (ADS)

    Abilov, Ch. I.; Hasanova, M. Sh.; Huseynova, N. T.; Zeynalov, S. A.

    2016-03-01

    By the methods of the physic-chemical analysis, determination of density and by measurement of micro hardness the character of chemical interaction in the In2Te3-Cu2Ga4Te7 system has been investigated and its faze diagram has been plotted. It is established that the system is quasibinary, of eutectic type. In the system the chemical combination of CuGa2InTe5 composition melting congruently at 855°C is generated. There have been revealed solid solutions boundary of which based on In2Te3 reach 5mol% at room temperatures. Temperature dependences of electric conductivity, the coefficient of thermo-emf, general heat conductivity, the Hall mobility of charge carriers.The mechanisms of electron-phonon diffusion in crystals of its compound have been revealed.

  6. [The importance of Willis ring as valvular mechanism in cerebral circulation in patients with different degree of internal carotid artery occlusion].

    PubMed

    Volievica, Alma; Kulenovic, Amela; Lujinovic, Almira; Talovic, Elvira

    2006-01-01

    Cerebrovascular deseases , cerebral vessels deseases, represents one of the greatest problems of humankind. The reasons are not just the high incidence and relatively high prevalence of letal outcomes in the acute faze of the desease, but also high level of disfunctionality caused by this disease in numerous patients who survived cerebrovascular insult and haemorraghe The onset, course and outcome of cerebrovascular diseases depends among other things on the possibility o f colateral brain circulation establishment. Willis ring onthe base of the brain is the most important anastomosis between circulation in both carotid arteries and basilar artery. First precondition for Willis ring t o function as valvular mechanisam is its intact configuration. But, it is found in almost half of th e subjectsincluded in the study that certain anatomical abnormalities in the Willis ring structure exist. Presence of these abnormalities favors onset of vascular diseases since they unables colateral circulation establishment. Studies till now have shown that all components of Willis ring do not contribute equally in colateral function among obstructive diseases.

  7. The Development of an Electronic Portfolio for Postgraduate Surgical Training in Flanders.

    PubMed

    Peeraer, G; Van Humbeeck, B; De Leyn, P; Delvaux, G; Hubens, G; Pattyn, P; De Win, G

    2015-01-01

    Contemporary surgical postgraduate training is characterized by clear outcomes for the profession and an assessment program that shows that trainees master these outcomes. The tool used to collect assessment and feedback instruments is the portfolio, nowadays used in many countries worldwide. The four Flemish surgical coordinators, together with experts from different universities, devised an electronic portfolio. This portfolio holds both the logbook, as imposed by the evaluation committee and assessment instruments used for the Master in Specialized Medicine. The e-portfolio is now used by a number of surgical trainees and has been approved by the evaluation committee. In 1015, all Flemish surgical trainees will be using one and the same e-portfolio. Although the e-portfolio for surgical training has now been devised and accepted by all major parties involved, a lot of work has to be done to implement the instrument. As resident duty hours show no improvement on education in surgery (but rather a perception of worsened education) surgery training is fazing huge challenges.

  8. The Development of an Electronic Portfolio for Postgraduate Surgical Training in Flanders.

    PubMed

    Peeraer, G; Van Humbeeck, B; De Leyn, P; Delvaux, G; Hubens, G; Pattyn, P; De Win, G

    2015-01-01

    Contemporary surgical postgraduate training is characterized by clear outcomes for the profession and an assessment program that shows that trainees master these outcomes. The tool used to collect assessment and feedback instruments is the portfolio, nowadays used in many countries worldwide. The four Flemish surgical coordinators, together with experts from different universities, devised an electronic portfolio. This portfolio holds both the logbook, as imposed by the evaluation committee and assessment instruments used for the Master in Specialized Medicine. The e-portfolio is now used by a number of surgical trainees and has been approved by the evaluation committee. In 2015, all Flemish surgical trainees will be using one and the same e-portfolio. Although the e-portfolio for surgical training has now been devised and accepted by all major parties involved, a lot of work has to be done to implement the instrument. As resident duty hours show no improvement on education in surgery (but rather a perception of worsened education) surgery training is fazing huge challenges. Copyright© Acta Chirurgica Belgica.

  9. New analytical method for solving Burgers' and nonlinear heat transfer equations and comparison with HAM

    NASA Astrophysics Data System (ADS)

    Rashidi, M. M.; Erfani, E.

    2009-09-01

    In this study, we present a numerical comparison between the differential transform method (DTM) and the homotopy analysis method (HAM) for solving Burgers' and nonlinear heat transfer problems. The first differential equation is the Burgers' equation serves as a useful model for many interesting problems in applied mathematics. The second one is the modeling equation of a straight fin with a temperature dependent thermal conductivity. In order to show the effectiveness of the DTM, the results obtained from the DTM is compared with available solutions obtained using the HAM [M.M. Rashidi, G. Domairry, S. Dinarvand, Commun. Nonlinear Sci. Numer. Simul. 14 (2009) 708-717; G. Domairry, M. Fazeli, Commun. Nonlinear Sci. Numer. Simul. 14 (2009) 489-499] and whit exact solutions. The method can easily be applied to many linear and nonlinear problems. It illustrates the validity and the great potential of the differential transform method in solving nonlinear partial differential equations. The obtained results reveal that the technique introduced here is very effective and convenient for solving nonlinear partial differential equations and nonlinear ordinary differential equations that we are found to be in good agreement with the exact solutions.

  10. Hydrophobic sodium fluoride-based nanocrystals doped with lanthanide ions: assessment of in vitro toxicity to human blood lymphocytes and phagocytes.

    PubMed

    Sojka, Bartlomiej; Kuricova, Miroslava; Liskova, Aurelia; Bartusova, Maria; Banski, Mateusz; Misiewicz, Jan; Dusinska, Maria; Horvathova, Mira; Jahnova, Eva; Ilavska, Silvia; Szabova, Michaela; Rollerova, Eva; Podhorodecki, Artur; Tulinska, Jana

    2014-11-01

    In vitro immunotoxicity of hydrophobic sodium fluoride-based nanocrystals (NCs) doped with lanthanide ions was examined in this study. Although there is already a significant amount of optical and structural data on NaYF4 NCs, data on safety assessment are missing. Therefore, peripheral whole blood from human volunteers was used to evaluate the effect of 25 and 30 nm hydrophobic NaYF4 NCs dissolved in cyclohexane (CH) on lymphocytes, and of 10 nm NaYF4 NCs on phagocytes. In the concentration range 0.12-75 µg cm(-2) (0.17-106 µg ml(-1) ), both 25 and 30nm NaYF4 NCs did not induce cytotoxicity when measured as incorporation of [(3) H]-thymidine into DNA. Assessment of lymphocyte function showed significant suppression of the proliferative activity of T-lymphocytes and T-dependent B-cell response in peripheral blood cultures (n = 7) stimulated in vitro with mitogens phytohemagglutinin (PHA) and pokeweed (PWM) (PHA > PWM). No clear dose-response effect was observed. Phagocytic activity and respiratory burst of leukocytes (n = 5-8) were generally less affected. A dose-dependent suppression of phagocytic activity of granulocytes in cultures treated with 25 nm NCs was observed (vs. medium control). A decrease in phagocytic activity of monocytes was found in cells exposed to higher doses of 10 and 30 nm NCs. The respiratory burst of phagocytes was significantly decreased by exposure to the middle dose of 30 nm NCs only. In conclusion, our results demonstrate immunotoxic effects of hydrophobic NaYF4 NCs doped with lanthanide ions to lymphocytes and to lesser extent to phagocytes. Further research needs to be done, particularly faze transfer of hydrophobic NCs to hydrophilic ones, to eliminate the solvent effect.

  11. Multipole moments in the effective fragment potential method

    DOE PAGES

    Bertoni, Colleen; Slipchenko, Lyudmila V.; Misquitta, Alston J.; ...

    2017-02-17

    In the effective fragment potential (EFP) method the Coulomb potential is represented using a set of multipole moments generated by the distributed multipole analysis (DMA) method. Misquitta, Stone, and Fazeli recently developed a basis space-iterated stockholder atom (BS-ISA) method to generate multipole moments. This study assesses the accuracy of the EFP interaction energies using sets of multipole moments generated from the BS-ISA method, and from several versions of the DMA method (such as analytic and numeric grid-based), with varying basis sets. Both methods lead to reasonable results, although using certain implementations of the DMA method can result in large errors.more » With respect to the CCSD(T)/CBS interaction energies, the mean unsigned error (MUE) of the EFP method for the S22 data set using BS-ISA–generated multipole moments and DMA-generated multipole moments (using a small basis set and the analytic DMA procedure) is 0.78 and 0.72 kcal/mol, respectively. Here, the MUE accuracy is on the same order as MP2 and SCS-MP2. The MUEs are lower than in a previous study benchmarking the EFP method without the EFP charge transfer term, demonstrating that the charge transfer term increases the accuracy of the EFP method. Regardless of the multipole moment method used, it is likely that much of the error is due to an insufficient short-range electrostatic term (i.e., charge penetration term), as shown by comparisons with symmetry-adapted perturbation theory.« less

  12. High Energy Electrons and Gamma Rays from the ATIC-2 Balloon Flight

    NASA Astrophysics Data System (ADS)

    Isbert, J. B.; ATIC Collaboration

    2004-08-01

    The Advanced Thin Ionization Calorimeter (ATIC) Balloon Experiment is primarily designed to measure the spectra of nuclear cosmic rays (protons to nickel). It is composed of a segmented BGO calorimeter (18 radiation lengths deep) following a carbon target (0.75 nuclear interaction lengths) interleaved with scintillator tracking layers. A Silicon matrix detector at the entrance identifies the incident particle charge. Utilizing simulations such as Fluka and Geant we have investigated the ability of this design to differentiate electron (gamma) initiated showers from hadronic showers. The differences in shower development between the two populations are sufficient to differentiate them for measurements of electron spectra into the TeV region, as confirmed by accelerator tests at CERN and by the ATIC-1 test flight in 2000-01. ATIC had a successful science flight in 2002-03 from McMurdo, Antarctica returning about 19 days of flight data. This exposure is sufficient to record electrons into the TeV region and measure gamma rays at 100's of GeV. The majority of gamma rays are of atmospheric origin and provide a test for this technique. The preliminary electron spectrum from the ATIC-2 flight is presented and compared to previous high energy measurements, principally from emulsion chambers. Possible astrophysical interpretations of the results are discussed. The ATIC Collaboration: J.H. Adams,2 H.S. Ahn,3 G.L. Bashindzhagyan,4 K.E. Batkov,4 J. Chang,6,7 M. Christl,2 A.R. Fazely,5, O. Ganel,3 R.M. Gunasingha,5 T.G. Guzik,1 J. Isbert,1 K.C. Kim,3 E.N. Kouznetsov,4 M.I. Panasyuk,4 A.D. Panov,4 W.K.H. Schmidt,6 E.S. Seo,3 N.V. Sokolskaya,4 J.Z. Wang,3 J.P. Wefel,1 J. Wu,3 V.I. Zatsepin,4 (1) Louisiana State University, Baton Rouge, LA, USA (2) Marshall Space Flight Center, Huntsville, AL, USA (3) University of Maryland, College Park, MD, USA (4) Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia (5) Southern University, Baton Rouge, LA, USA (6

  13. Late Quaternary chronology of paleo-climatic changes in Caspian Sea region based on Lower Volga sections

    NASA Astrophysics Data System (ADS)

    Kurbanov, Redzhep; Yanina, Tamara; Murray, Andrew; Svitoch, Alexander; Tkach, Nikolai

    2017-04-01

    Valdai glaciation. Lower soil horizon that has no dating, logically refers to the maximum warm era of Mikulino interglacial (MIS 5e). In the history of Caspian Sea this era responded to Late Khazarian transgressive-regressive stage (MIS 5): Late Khazarian minor transgression (level of about -10 m), characterized by warm-water, and the Hirkanian transgression with slightly cool environmental conditions. Both transgressive basins did not reach latitude of Srednyaya Akhtuba. Continuous stage of continental development of the territory, reflected in the structure of the section (layers 13-8), in the stratigraphic scheme of the Caspian region refers to Atelian formation, situated between Late Khazarian and Khvalynian transgressive epochs of the basin. Different facies complex (layers 11-9) of alluvial deposits of the section reflects the stage of initial development stage of Khvalynian transgression of the Caspian Sea - the accumulation of alluvium strata in raising erosion basis conditions, responding to interstadial Inter-Valdai warming era (MIS 3). Late Pleistocene continental development stage ends with faze of accumulation of loess sandy loam (layer 8). Obviously, it correlates with the last glacial maximum (MIS 2), dry cold era, conditions of which were not conducive to the development of the Caspian transgression - it was regressive (eltonskaya regression?) stage. Thus, the continental Atelian era of the upper (Volgograd) area of the Lower Volga region reflects three distinct paleogeographic events of the Caspian Sea history: 1. Atelian Caspian regression in conditions of Kalinin glaciation (MIS 4); 2. The initial stage of Khvalynian transgression under interstadial warming (MIS 3); 3. Regression, corresponding Ostashkovski glaciation (MIS 2). This sediments complex represents Atelian formation in Caspian region stratigraphic scheme, the amount of which is beyond the scope of the same name regression (Atelian). "Marine" stage of area development is expressed in