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  • 1
    Electronic Resource
    Electronic Resource
    Modelling of chemical vapour deposition for optical fibre manufacture (1995)
    Springer
    Optical and quantum electronics 27 (1995), S. 327-335 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract A study of numerical modelling has been carried out for chemical vapour deposition processes with applications to manufacture of optical fibres. Temperature distributions and thermophoretic particle deposition have been calculated for the modified chemical vapour deposition (MCVD) and the outside vapour deposition (OVD) processes. A two torch formulation and a heat flux boundary condition are used for MCVD and the present model is shown to be capable of predicting tube wall temperatures and deposition profiles correctly. The present results are in agreement with experimental data. For OVD modelling, nonorthogonal body-fitted coordinates have been utilized to solve a conjugate problem including the jet flow and heat conduction through a two-layered cylinder that consists of an original target and the deposited porous layers. Surface temperatures and efficiencies of particle deposition have been obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00563567
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  • 2
    Electronic Resource
    Electronic Resource
    Amylase Polymorphism of Littorina brevicula from Polluted and Unpolluted Sites, Korea (1999)
    Springer
    Bulletin of environmental contamination and toxicology 63 (1999), S. 633-638 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001289901027
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  • 3
    Electronic Resource
    Electronic Resource
    Deficiency of AMP deaminase in erythrocytes (1987)
    Springer
    Human genetics 〈Berlin〉 75 (1987), S. 15-18 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Six individuals with complete deficiency of erythrocyte AMP deaminase have been discovered. They are all healthy and have no hematological disorders. The deficiency is only in isozyme E, which is the erythrocyte type isozyme, and is inherited as an autosomal recessive trait. The frequency of the mutant gene is surprisingly high, one heterozygote in about 30 of the population in Japan, Seoul, and Taipei. The ATP level is approximately 50% higher in AMP-deficient erythrocytes compared to that of control cells. Degradation of adenine nucleotide is slower in the deficient erythrocytes than in the control erythrocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273831
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of visual evoked potentials using the time locus of potential distribution centre (1986)
    Springer
    Medical & biological engineering & computing 24 (1986), S. 169-173 
    Details
    ISSN: 1741-0444
    Keywords: Correlation ; Visual evoked potential ; Visual pathway ; Weighting matrix
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Visual evoked potentials (VEPs) were measured using 19 electrodes attached to the scalps of five normal human subjects during stimulations of the full-field and hemifield chequerboard pattern reversal. These signals were analysed by a new method based on the time locus of the potential distribution centre, where this locus was computed from the spatial potential distribution using the weighting matrix and maximum mean cross-correlation criteria. The results showed that the loci of normal subjects are similar, with an average correlation of 0·87. The loci produced in the left hemifield stimulation were different from the loci produced during the right hemifield stimulation, with a correlation of −0·66. Experimental results from four cats showed significant changes of the time loci after surgical division of the visual path-ways.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02443931
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  • 5
    Electronic Resource
    Electronic Resource
    Heritability of urine and plasma amylase activity (1977)
    Springer
    Journal of human genetics 22 (1977), S. 79-88 
    Details
    ISSN: 1435-232X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Urine amylase activity was measured in 142 boys and girls including unrelated twin individuals, aged 12–16 years. Statistical analysis revealed different distribution in the group with positive protein or blood reaction. Log distribution in a homogeneous sample population was unimodal with a skewness ( $$\sqrt {\beta _1 } $$ =−0.6493) and kurtosis (β2=3.4917). Intraclass correlation coefficients of overall activities were 0.6696 (p〈0.001) in MZ twins (50 pairs) and −0.1299(n.s.) in DZ twins (22 pairs). In the rate of isozyme activity, correlation was nonsignificant. Plasma of 36 twin pairs aged 13 to 15 years were similarly examined. Log distribution of overall activity was unimodal with a skewness ( $$\sqrt {\beta _1 } $$ =0.2321) and kurtosis (β2=0.7416). Intraclass correlation coefficients of overall activity were 0.8413 (p〈0.001) in MZ twins (29 pairs) and 0.3689 (n.s.) in DZ twins (7 pairs). Intraclass correlation of plasma isozyme activity rate was 0.5490 (p〈0.01) in MZ twins, but not significant in DZ twins. Parent-offspring correlation of plasma overall amylase activity was 0.2848 (p〈0.05) and its mid-parent-offspring correlation was 0.3727 (p〈0.05). Heritability was 0.5298 from parent-offspring regression and 0.4408 from mid-parent-offspring regression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01874272
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of impurities in semiconductor grade silicon by instrumental neutron activation analysis (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 151 (1991), S. 373-378 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Instrumental neutron activation analysis has been applied to semiconductor grade silicon to study the concentration levels of impurity elements, the contamination during the single crystal growing process, and the vertical and radial distributions of impurities, along with the decontamination effect in the analysis. Twenty elements of Au, Br, As, W, Cr, Co, Na, Eu, La, Se, Zn, U, Th, Hf, Fe, Sb, Ag, Ce, Tb and Ta have been analyzed in p- and n-type wafers, single crystals and a polycrystal by a single comparator method using two comparators of gold and cobalt. Considerable surface contamination has been found and could be removed by etching the surface with nitric and hydrofluoric acid before and after irradiation. The impurity concentration has been found to be generally increased in the process of single crystal growth. The vertical and radial distributions of impurities have revealed that some impurity elements were more concentrated in the top region of a single crystal rod than in the middle region, and that Br, Cr, La, Eu and Sb were enriched in the central region and As, U and Fe in the outer region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02035497
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of impurities in titanium and titanium oxide by radiochemical neutron activation analysis (1995)
    Springer
    Journal of radioanalytical and nuclear chemistry 192 (1995), S. 155-162 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A radiochemical neutron activation analysis has been applied to 2N–4N grade titanium metal and its oxide. Twenty two impurities were separated in a group from scandium by a radiochemical separation method using cation exchange resin with HBr and HCl. The contents of the elements were calculated by a single comparator method using two monitors. The analytical results agree well within 10% deviation with those obtained by instrumental method. Eighteen elements, Na, Fe, Co, As, Se, Sr, Mo, Sb, La, Eu, Tb, Yb, Lu, Hf, Ta, W, Th and U, are determined in titanium oxides and 17 elements, Na, Cr, Fe, Co, Se, As, Zr, Mo, Sb, Cs, Ce, Tb, Yb, Hf, Ta, W and Th, in titanium metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037748
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of Impurities in Gallium Oxide by NAA (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 37-40 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Neutron activation analysis has been applied to determine 12 elements, viz. Na, Mn, As, Fe, Co, Zn, Se, Sc, Cr, Sb, Hf and Ta in high-purity Ga2O3. The first 7 elements could be determined by anion exchange separation and isopropyl ether extraction, and the last 8 elements by instrumental method. It is recommended that the first 3 elements are determine by one of the radiochemical modes and the others by the instrumental method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006774225239
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  • 9
    Electronic Resource
    Electronic Resource
    Fast neutron activation analysis of rare-earth elements in monazite from Korea (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 114 (1987), S. 359-365 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The relative ans single comparator methods have been applied to determine 7 rare-earth elements and U, Th in Korean Monazites by 14.5 MeV neutron activation analysis. The (n, 2n) nuclear reactions are used for all elements except La, for which (n, p) reaction is used. Al is used as a flux monitor for the relative method and as a singlle comparator for the single comparator method. The analytical results obtained by the two methods agree well within 3% deviation except for Sm and Gd. These results are also compared with the result obtained by a single comparator method using reactor neutron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039811
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  • 10
    Electronic Resource
    Electronic Resource
    Ion Exchange Separation Techniques for NAA of Refractory Metals (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 41-45 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Radiochemical separation methods have been applied for the neutron activation analysis of impurities in four high-purity refractory metals, Ta, Nb, W and Mo. Impurities in the metals of Ta, Nb and W can be separated into groups using anion exchange resin with HF and/or a mixture of HF acid and HCl, but those in Mo is done using both anion and cation exchange resins. The coprecipitation of U with Th in HF media is also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006782426147
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