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  • 1
    Electronic Resource
    Electronic Resource
    Kolmogorov similarity in freely decaying turbulence (1987)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 30 (1987), S. 2030-2039 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A direct numerical simulation of the three-dimensional Navier–Stokes equation at high Reynolds numbers is performed by the spectral method with 3×3403 effective modes (853 independent degrees of freedom) starting from a high-symmetric flow. Kolmogorov's [C. R. (Dokl.) Acad. Sci. URSS 30, 301 (1941)] similarity forms of the energy spectra (the one-dimensional longitudinal and lateral energy spectra as well as the three-dimensional one) in the universal range are observed in a decaying period after the enstrophy takes the maximum value. During this period the energy decays exponentially in time and the microscale Reynolds number changes from 100 to 60. At the lower part of the universal range Kolmogorov's inertial range spectrum E(k,t)=Aε(t)2/3k−5/3 is observed over nearly one decade of the wavenumber, where the Kolmogorov constant A≈1.8. At the higher part of the universal range, on the other hand, it has an exponential tail with an algebraic correction, E(k,t)/[ε(t)ν5]1/4 =B(k/kd(t))m exp[−β(k/kd(t))], R)], where B≈8.4, m≈−1.6, β≈4.9, and kd(t)=[ε(t)/ν3]1/4 is the energy dissipation wavenumber.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866137
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  • 2
    Electronic Resource
    Electronic Resource
    Time-of-flight neutron small-angle scattering from a superconducting composite wire (1982)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 15 (1982), S. 611-614 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The precipitation behavior in the Ti–27at.%Nb–6at.%Ta–6at.%Zr alloy aged at 643 K was examined by means of time-of-flight neutron small-angle scattering. When the alloy was aged, fine-scale α precipitates appeared. During the precipitation process, each precipitate grew in size, but the total number of precipitates remained nearly constant up to 1 Ms of ageing. The increase of critical superconducting current density could be connected with increasing size of α precipitates. The specimen for the measurements consisted of a composite containing 3721 filaments in a copper matrix. The use of neutrons was shown to give great advantages for the investigation of precipitation phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889882012771
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  • 3
    Electronic Resource
    Electronic Resource
    Novel and sensitive noncompetitive enzyme immunoassay for kassinin in rat plasma (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 470-472 
    Details
    ISSN: 1420-9071
    Keywords: Enzyme immunoassay ; peptide ; kassinin ; biotinylation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A novel and sensitive noncompetitive enzyme immunoassay for kassinin is described. Kassinin was biotinylated using sulfosuccinimidyl-6-(biotinamido)hexanoate. The biotinylated kassinin was trapped on antikassinin IgG-coated polystyrene balls and, after washing to eliminate other biotinylated substances, was eluted with HCl. The biotinylated kassinin eluted was reacted with anti-kassinin Fab'-peroxidase conjugate and trapped onto streptavidin-coated polystyrene balls. Peroxidase activity bound to the polystyrene balls was assayed by fluorimetry. The detection limit of kassinin was 0.13 pg (0.1 fmol)/tube or 0.065 μg/l of rat plasma, which was 750-fold or 15-fold lower than that for competitive radioimmunoassay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952033
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  • 4
    Electronic Resource
    Electronic Resource
    Esterase variation and insecticide resistance in Japanese Aphis gossypii (1988)
    Springer
    Entomologia experimentalis et applicata 48 (1988), S. 37-41 
    Details
    ISSN: 1570-7458
    Keywords: Aphis gossypii ; cotton aphid ; clone ; esterase ; electrophoresis ; insecticide resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'activité estérase et la résistance aux insecticides ont été examinées chez 9 clones de A. gossypii, récoltés dans 5 sites du Japon. Ces clones ont été groupés en 6 types suivant le comportement et l'activité de l'estérase mis en évidence par électrophorèse. 3 clones ont présenté une activité estérase très élevée (type 1) et des résistances, moyenne pour le malathion et très élevée pour le pirimicarbe. Parmi les 6 clones ayant une activité estérase modérée, un clone (T-4a) était sensible au malathion mais très résistant au pirimicarbe, tandis que les 5 autres clones (T-2, 3a, 3b et 4b) étaient très sensibles aux deux insecticides. Ainsi, la résistance au malathion présente une forte corrélation avec une activité estérase élevée, sans qu'il n'en soit nécessairement de même pour la résistance au pirimicarbe. Une hypothèse est émise suivant laquelle l'activité estérase élevée joue un rôle important dans la résistance à ces deux insecticides, mais qu'un autre mécanisme intervient aussi dans la résistance au pirimicarbe.
    Notes: Abstract Nine clones of Aphis gossypii Glover (Homoptera: Aphididae) collected from five localities in Japan were tested for esterase activity and resistance to two insecticides. These clones were classified into six types according to esterase pattern and activity detected by electrophoresis. Three clones with very high esterase activity (Type-1) were moderately resistant to malathion and very highly so to pirimicarb. Of six clones with moderate esterase activity one clone (T-4a) was susceptible to malathion but highly resistant to pirimicarb, whereas five clones (T-2, 3a, 3b and 4b) were susceptible to both insecticides. Thus malathion resistance is positively correlated with high esterase activity, whereas pirimicarb resistance is not necessarily so. It is suggested that high esterase activity plays an important role in resistance to these insecticides but that another mechanism is also responsible for resistance to pirimicarb.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00343382
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  • 5
    Electronic Resource
    Electronic Resource
    Small-angle neutron scattering from Al-Zn and AI-Zn-Mg alloys during Guinier-Preston zone formation (1981)
    Springer
    Colloid & polymer science 259 (1981), S. 670-674 
    Details
    ISSN: 1435-1536
    Keywords: Neutron Scattering ; Small-angle Scattering ; Al-Zn Alloys ; Guinier-Preston zone ; Age-hardening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die Kleinwinkelstreuung der Neutronen von A1-6.8 at % Zn und Al-6.8 at % Zn- 0.1 at % Mg-Legierungen während der Guinier-Preston-Zonen-Bildung wurde am KUR (Kyoto Universität Reaktor) gemessen. Die Proben wurden aus 300 °C in Salzwasser von — 20 °C abgeschreckt und bei 77 K gehalten. Sie wurden bei 40 °C während der verschiedenen Zeitdauer von 0 bis 1000 Minuten mit der nachfolgenden Neutronenmessung bei 77 K gealtert. Die gemessene zeitliche Entwicklung des Streuquerschnittes kann qualitativ erklärt werden in übereinstimmung mit Saitos Formel, die aus zwei verschiedenen Teilen besteht, die der inkohärenten anomalen Schwankung und der kohärenten geordneten Struktur der Konzentration entsprechen.
    Notes: Summary Small-angle neutron scattering from A1-6.8 at % Zn and Al-6.8 at % Zn-0.1 at % Mg alloys during Guinier-Preston zone formation have been measured at KUR (Kyoto University Reactor). The samples were quenched from 300 °C into brine at -20 °C and kept at 77 K. They were aged at 40 °C for various periods ranging from 0 up to 1000 minutes each with subsequent neutron measurement at 77 K. The observed temporal evolution of the cross section can be interpreted qualitatively in terms of Saito's formula which consists of two distinct parts due to the incoherent anomalous fluctuation and to the coherent ordered structure of the concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01525036
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  • 6
    Electronic Resource
    Electronic Resource
    SAXS study on the structure and crystallization of amorphous metallic alloys (1981)
    Springer
    Colloid & polymer science 259 (1981), S. 677-682 
    Details
    ISSN: 1435-1536
    Keywords: SAXS ; amorphons alloys ; compositional fluctuation ; structure of amorphons state ; crystallization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The change in structure of several amorphous alloys as Fe-P-C, Fe-B and Pd-Au-Si alloys during isothermal ageing was examined using small angle X-ray scattering technique as well as transmission electron microscopy. The SAXS intensity was related to two different types of scattering sources depending on ageing period and temperature. As-splatted amorphous alloys and the specimens aged for short period at relatively low temperature, where specimens remained in amorphous state, showed a weak and spreaded SAXS intensity. This indicates an existence of electron density fluctuation in amorphous phase. The dimension of their scattering regions was estimated to be 1.8 to 2.4 nm for Fe-P-C alloys, and 1.2 to 0.8 rim. for Fe-B alloys, respectively, by analysing the electron density-density correlation function derived from observed SAXS intensity. The origin has been discussed based on one dimensional model. A compositional fluctuation was made clear to occur in fine scale of about 1 nm in amorphous Fe-B and Fe-P-C alloys. When the alloys were aged for longer period below their crystallization temperatures, fine crystalline particles precipitate; those are a two phase lamella structure of Fe3P andα-Fe for a Fe83P10C7 alloy, an Ferich single phase for Fe83B17 alloy, and a Pd-rich single phase for Pd76Au6Si188 alloy, respectively. Their size and structure were determined from the analysis of SAXS data and TEM observation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01525038
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  • 7
    Electronic Resource
    Electronic Resource
    Application of emissionless infrared diffuse reflectance spectrometry for following reactions of adsorbed alcohols on an alumina catalyst (1980)
    Springer
    Reaction kinetics and catalysis letters 15 (1980), S. 193-196 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Были измерены ИК спектры спиртов, адсорбированных в условиях повышенных температур. Исходя из изменений интенсивности ИК поглощения, было установлено, что алкоксиды являются реактивными адсорбированными частицами, а карбоксилат—нереактивными, а также были рассчитаны константы скорости поверхностных реакций.
    Notes: Abstract IR spectra of adsorbed alcohols on alumina were measured under the reaction conditions at elevated temperatures. The transient response of IR absorption intensity indicates that alkoxides are reactive adsorbed species but carboxylates are not. The rate constants of surface reactions were calculated from the transient response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02062431
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  • 8
    Electronic Resource
    Electronic Resource
    Reduction of higher polymethylbenzenes by the rapid cation exchange of H-mordenite in the conversion of methanol to hydrocarbons (1981)
    Springer
    Reaction kinetics and catalysis letters 16 (1981), S. 243-246 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Под влиянием ионообмена калия распределение продуктов превращений метанола на мордените измеияется в зависимости от метола ионообнмена. Метод быстрого ионообмена оказался наиболе эффективным в подавлении образования более высоких полиметилбензолов.
    Notes: Abstract The product distribution in methanol conversion on mordenite is changed by potassium ion exchange depending on the method of ion exchange. The rapid exchange method was the most effective to suppress the formation of higher polymethylbenzenes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02065466
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of alkaline additives on the C−O bond dissociation of adsorbed CO in methanation over Ru/Al2O3 catalyst (1984)
    Springer
    Reaction kinetics and catalysis letters 26 (1984), S. 335-338 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Используя Импульсный Анализ Скоростей Поверхностных Реакций совместно с ИК спектрометрией безэмиссионного диффузного отразения, было найдено, что более низкое смещение валентных колебаний C−O адсорбированной CO — вызванное добавлением щелогного карбоната к Ru/Al2O3 —приводит к уменьшению константы скорости процесса диссоциации связи C−O адсорбированной CO в конверсии окиси углерода в метан.
    Notes: Abstract By using PSRA (Pulse Surface Reaction Rate Analysis) coupled with EDR (Emissionless Diffuse Reflectance Infrared Spectrometer), it was found that the lower shift of C−O stretching vibration of absorbed CO — caused by the addition of alkali carbonate to Ru/Al2O3 — leads to a decrease in the rate constant for the C−O dond dissociation process of adsorbed CO in methanation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067859
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  • 10
    Electronic Resource
    Electronic Resource
    Application of the vapor phase supporting (VPS) method for preparing SnO2/SiO2 catalysts (1982)
    Springer
    Reaction kinetics and catalysis letters 19 (1982), S. 135-138 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Катализаторы на носителях SnO2/SiO2 были приготовлены путем взаимодействия гидроксильных групп силикагеля и газофазной окиси олова. Каталитигеские свойства проверялись на реакции 2-пропанола с целью выявления эффекта циклов VPS на количество и природу активных уентров.
    Notes: Abstract Supported SnO2/SiO2 catalysts have been prepared by the reaction of the surface hydroxy groups of silica gel and gas phase tin chloride (PS method). The catalytic properties have been examined in the reaction of 2-propanol to show the effect of VPS cycles on the amount and nature of the active sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02065073
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