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  • 1
    Electronic Resource
    Electronic Resource
    Single amino acid substitutions insn-glycerol-3-phosphate dehydrogenase allozymes fromDrosophila virilis (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 312-314 
    Details
    ISSN: 1420-9071
    Keywords: Drosophila virilis ; sn-glycerol-3-phosphate dehydrogenase ; allozymes ; single amino acid substitution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The amino acid sequence was compared among the three allelic variants (allozymes) ofsn-glycerol-3-phosphate dehydrogenase inD. virilis, which are detected by one-dimensional electrophoresis. The αGPDHf variant was different from the αGPDHm by only one substitution of 68-lysine for asparagine; αGPDHs differed from αGPDHm by substitution of 127-glycine for arginine. No electrophoretically ‘silent’ substitutions were found in a total of 352 amino acid residues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01951822
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  • 2
    Electronic Resource
    Electronic Resource
    Photoelectric observations of VW Cephei in R and I (1994)
    Springer
    Experimental astronomy 5 (1994), S. 175-180 
    Details
    ISSN: 1572-9508
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Photoelectric observations of VW Cephei in R and I bands were made from 1989 to 1992. 17 primary minima and 11 secondary minima were covered, it is found from the present observations that the period abruptly changed aboutl990 and the maxima I and II exchanged between 1992 and 1993.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01583832
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  • 3
    Electronic Resource
    Electronic Resource
    Electrical property and defect structure of lanthanum-doped polycrystalline barium titanate (1987)
    Springer
    Journal of materials science 22 (1987), S. 4439-4445 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Electrical conductivity of two types of lanthanum-doped barium titanote ceramics with different dopant levels was measured at temperatures between 900 and 1250° C andP O 2from 10−5 to 1 atm. The activation energies of the conduction for the two are interpreted in terms of the formation energy of ionized oxygen vacancies even in such a highP O 2region. This fact is in contrast with a well -known controlled -valency model proposed for rare- earth -doped semi-conducting perovskites. In a lightly lanthanum-doped specimen, semiconduction achieved at elevated temperatures is retained on cooling the specimen to room temperature, whereas in a heavily doped specimen, the resultant high-temperature semiconduction changed to insulation on cooling. The former behaviour on cooling is successfully explained by a metastabilization of oxygen vacancies accompanied by electrons formed at elevated temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01132044
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  • 4
    Electronic Resource
    Electronic Resource
    Carbonization and graphitization of poly-p-phenylene sulphide (PPS) film (1994)
    Springer
    Journal of materials science 29 (1994), S. 4477-4480 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Oriented poly-p-phenylene sulphide (PPS) films (thickness 12 and 75 μm) and PPS powder were carbonized/graphitized after stabilizing by oxidation, in order to examine the effect of sulphur on graphitizability of the resulting carbons. The films and the powder resulted in carbons with a high and a low graphitizability respectively. An “in-plane oriented structure” of the PPS film was the most predominant factor to lead to a high graphitizability, and sulphur in the precursor did not lower the graphitizability when it was subjected to solid-phase carbonization. These phenomena are discussed on the basis of analytical data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00376269
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation of superconducting fine particles in the Bi-(Pb)-Ca-Sr-Cu-O system using the spray-pyrolysis method (1990)
    Springer
    Journal of materials science 1 (1990), S. 46-48 
    Details
    ISSN: 1573-482X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Uniformly-distributed fine particles of the compositions Bi2Ca2Sr2Cu3O x and Bi1.8Pb0.2Ca2Sr2Cu3O x have been prepared by the spray-pyrolysis method. The particles produced were spherical and their size could be controlled from submicrometer to micrometer by changing the concentration of the metal nitrates in the starting aqueous solutions. The crystalline phases of these particles were found to be greatly dependent on the oxygen partial pressure in the carrier gas, as well as the decomposition temperature. In the Bi2Ca2Sr2Cu3O x particles, the 80 K superconducting phase was only formed at around 800° C in nitrogen or low oxygen partial pressure, while the formation of the 80 K phase was further suppressed in the Bi1.8Pb0.2Ca2Sr2Cu3O x particles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716016
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  • 6
    Electronic Resource
    Electronic Resource
    Conversion electron Mössbauer spectroscopy using a CAMAC data acquisition system (KODAQ) (1993)
    Springer
    Hyperfine interactions 80 (1993), S. 1301-1305 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For simple depth selective conversion electron Mössbauer spectroscopy (CEMS) by using a He+CH4 proportional counter, a flexible and versatile CAMAC data acquisition system (KODAQ) which works on a popular Japanese personal computer PC9801VX (NEC) was applied. It is demonstrated that CEM spectra of the oxidized Fe thin film which is composed of Fe3O4, Fe1−xO and α-Fe metal are successfully obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00567495
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of haptoglobin in human serum by high-performance gel-permeation chromatography (1987)
    Springer
    Chromatographia 23 (1987), S. 89-92 
    Details
    ISSN: 1612-1112
    Keywords: Gel permeation chromatography ; Haptoglobin ; Hemoglobin ; Correlation with nephelometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A high-performance gel-permeation chromatographic (GPC) method is described for the determination of serum haptoglobin (Hp), based on the estimation of the haptoglobin-hemoglobin (Hp−Hb) complex. Hemoglobin (Hb) is added to the serum and the resulting Hp−Hb complex is separated by GPC and detected at 415 nm. The Hp−Hb complex separated chromatographically from serum migrated electrophoretically with the globulin fraction. It was found to be stable over a period of one week at 4°C. The total analysis time for a serum sample is approximately 20 min. The minimum detection limit is 30mg/L. Relative standard deviation values were below 1% (peak area). No interferences from bilirubin or from turbidity of samples were observed. The results of the GPC analysis correlate well with those obtained by nephelometric assay (r=0.996).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02312879
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  • 8
    Electronic Resource
    Electronic Resource
    Fluorescence immunological determination of immunoglobulin G in human serum by high-performance liquid gel-permeation chromatography (1988)
    Springer
    Chromatographia 25 (1988), S. 129-133 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Gel permeation ; Human serum IgG ; Fluorescent immune complex ; Fluoresence detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A high-performance liquid gel-permeation chromatographic method is described for the determination of human serum immunoglobulin G (IgG) by separating the fluorescent immuno complex from the free fluorescence-labeled antibody. Fluorescence-labeled antibody used in this study was fluorescein isothiocyanate (FITC)-labeled Fab fragment goat anti-human IgG (anti-IgG Fab). Immuno complexes and antibody of different molecular sizes can be separated. FITC-labeled anti-IgG Fab was added to the serum and the mixture is passed through the column. An immuno complex separates as well-delineated peak in the column void volume, and was measured by the fluorescence of the column eluate (Ex=490nm, Em=520nm). The total analysis time for a serum sample was approximately 15min. The minimum detection limit was 25 mg/dl. The relative standard deviation was below 2% (peak area). The results of the HPL-GPC analysis correlate well with those obtained by laser nephelometric assay (r=0.992).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259029
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  • 9
    Electronic Resource
    Electronic Resource
    Surface kinetic aspects of Si incorporation in molecular beam epitaxial growth of GaAs (1989)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 14 (1989), S. 619-622 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The incorporation and amphoteric behavior of Si impurities in Si-doped (100) oriented molecular beam epitaxial (MBE) GaAs layers grown under different As4/Ga flux ratios but with a fixed Si flux have been studied using Hall effect measurements, photothermal ionization spectroscopy and photoluminescence. The Si donor concentration increases substantially with increasing As4/Ga flux ratio, while the Si acceptor concentration remains less than ∼ 1013 cm-3, regardless of the variation of As4/Ga flux ratio. The observed increase of carrier concentration with increasing V/III ratio is not due to a change of site preference of Si impurities from Ga to As sublattice sites as previously supposed, but is due to the increase in incorporation of Si donor. This result can be explained by the kinetic effects associated with surface reaction processes involved in Si impurity incorporation. From these results it is clear that the sticking coefficient of Si is less than unity, and varies with the growth conditions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740141010
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  • 10
    Electronic Resource
    Electronic Resource
    Defect formation observed by AES in a-SiO2 films prepared by photochemical vapour deposition (1990)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 16 (1990), S. 435-439 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Damageless conditions in AES measurement were examined carefully on both thermally oxidized and photochemical vapour deposited amorphous SiO2 films as a function of dose rate and total dose. The lower dose rate resulted in the formation of a higher density of oxygen-deficient defects under the constant total dose condition. Among the films examined, it was found that F-doped films prepared by photochemical vapour deposition best resisted electron damage. The results are discussed using the model of defect generation consisting of a cascade process, bond breaking and diffusion of oxygen.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740160190
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