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  • 1
    Electronic Resource
    Electronic Resource
    Melt Treatment of A357 Alloy by Flux Injection (2000)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 331-337 (May 2000), p. 283-288 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/04/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.331-337.283.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Morphological evidence of reinnervation of the baroreceptive regions in sinoaortic-denervated rats (2003)
    Oxford, UK : Blackwell Science Pty
    Clinical and experimental pharmacology and physiology 30 (2003), S. 0 
    Details
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The arterial baroreflex (ABR) plays an important role in the maintenance of the stability of blood pressure. Sinoaortic denervation (SAD) destroys the integrity of the reflex arc and produces severe organ damage in rats. However, partial recovery of ABR function has been observed following chronic denervation. The aim of the present study was to determine whether there was morphological evidence of reinnervation of the aortic arch and carotid sinus following SAD.2. A substantial body of physiological and morphological evidence suggests that substance P (SP) may be a neurotransmitter contained in first-order sensory baroreceptor afferents; therefore, the patterns of vascular SP and neurofilament (NF) immunoreactive (IR) innervation of the aortic arch and carotid sinus were investigated in the present study.3. Ten-week-old male Sprague-Dawley rats underwent SAD or sham operation. Whole mounts of carotid bifurcation and aortic arch were prepared for immunohistochemical study at various time points (1, 9 and 16 weeks after operation).4. The results of computerized image analysis show that the mean density of NF- and SP-IR nerves of SAD rats 9 and 16 weeks after operation increased gradually and significantly compared with that of rats 1 week after operation.5. In conclusion, the results indicate that there is reinnervation of the aortic arch and carotid sinus by NF- and SP-IR fibres in SAD rats, which may be the morphological basis for the partial restoration of ABR function over time after SAD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1440-1681.2003.03938.x
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  • 3
    Electronic Resource
    Electronic Resource
    Surface relief associated with martensite and bainite in a Cu–Zn–Al alloy measured by atomic force microscopy (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 9129-9133 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Atomic force microscopy was employed to quantitatively study the surface relief accompanying martensite and bainite in a Cu–Zn–Al alloy. It is demonstrated that the surface relief angle associated with martensite is 14.3°, in good agreement with the theoretical result deduced from the phenomenal theory of martensite crystallography (PTMC). However, the surface relief angle associated with bainite is 2.0°–3.2°, which disagrees with the PTMC result. This indicates that the transformation mechanism of bainite is different from that of martensite. The fine structures of the surface relief associated with martensite and bainite are also investigated. The surface relief of martensite is composed of the small parallel relief caused by small martensite plates, and that of bainite is composed of small cells induced by subunits in bainite. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362583
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  • 4
    Electronic Resource
    Electronic Resource
    High-power and long-lifetime InAs/GaAs quantum-dot laser at 1080 nm (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2868-2870 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High power and long lifetime have been demonstrated for a semiconductor quantum-dot (QD) laser with five-stacked InAs/GaAs QDs separated by an InGaAs strain-reducing layer (SRL) and a GaAs spacer layer as an active medium. The QD lasers exhibit a peak power of 3.6 W at 1080 nm, a quantum slope efficiency of 84.6%, and an output-power degradation rate of 5.6%/1000 h with continuous-wave constant-current operation at room temperature. A comparative reliability investigation indicates that the lifetime of the InAs/GaAs QD laser with the InGaAs SRL is much longer than that of a QD laser without the InGaAs SRL. This improved lifetime of the QD laser could be explained by the reduction of strain in and around InAs QDs induced by the InGaAs SRL. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1415416
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  • 5
    Electronic Resource
    Electronic Resource
    Potential monitoring for reducing power of solution containing HNO"3-Al(NO"3)"3"- UO"2(NO"3)"2"-NP^4^+^,^5^+-Pu^3^+^,^4^+-FeSA
    Amsterdam : Elsevier
    Journal of Inorganic and Nuclear Chemistry 43 (1981), S. 2925-2927 
    Details
    ISSN: 0022-1902
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-1902(81)80644-6
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  • 6
    Electronic Resource
    Electronic Resource
    Synergistic extraction of uranium(VI) with 1-phenyl-3-methyl-4-(2′-chlorobenzoyl)-pyrazolone-5 and acidic organophosphorus reagents (1988)
    Springer
    Journal of radioanalytical and nuclear chemistry 120 (1988), S. 393-400 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study of the synergistic extraction of uranium(VI) from sulphuric acid solution with 1-phenyl-3-methyl-4-(2′-chlorobenzoyl)-pyrazolone-5 (PMCBP) together with di-(2-ethylhexyl)-phosphoric acid (HDEHP) and also mono-(2-ethylhexyl)-2-ethylhexyl-phosphate (HEHEHP) is described. The results suggest that the compositions of the extracted species is UO2XHA2 and UO2X2H2A2 respectively. Models for the extraction mechanism is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037354
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation of uranium(III) by mercury cathode electrolysis and its absorption spectra in hydrochloric acid solution (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 147 (1991), S. 277-285 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The reduction of hexavalent to trivalent uranium by mercury cathode electrolysis in hydrochloric acid solution was investigated. The dependence of the reducton ratio on the different media, the acid and uranium concentrations, and on the time of electrolysis was determined. It was found that hexavalent uranium can be reduced quantitatively to trivalent state by mercury cathode electrolysis. The absorption spectra of U(III) and U(IV) in 1M and 9M hydrochloric acid solutions were examined. The molar extinction coefficient of U(III) at 521 nm was 16.7 m2·mol−1 within the HCl concentration range of 0.5–4.5M. U(IV) practically does not interfere in the photometric determination of U(III) at this wavelength. A good linear dependence of absorbance on the concentration of U(III) was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02040376
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  • 8
    Electronic Resource
    Electronic Resource
    Synergistic extraction of uranium(VI) with 1-phenyl-3-methyl-4-acylpyrazolone-5 and neutral extractants (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 147 (1991), S. 287-295 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The synergistic extraction of uranium(VI) from hydrochloric acid solution with five chelating agents: 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (PMBP), 1-phenyl-3-methyl-4-acetylpyrazolone-5 (PMAP), 1-phenyl-3-methyl-4-(2′-chlorobenzoyl)pyrazolone-5 (PMCBP), 1-phenyl-3-methyl-4-(p-nitrobenzoyl)pyrazolone-5 (PMNBP) and 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (PMTFP) plus the neutral extractants tributylphosphate (TBP), dioctyl sulfoxide (DOSO) and trioctylphosphine oxide (TOPO) in chloroform has been investigated. The extraction coefficients have been found to be greater for such mixtures than the individual component. The formulas of the extracted species have been determined to be UO2A2B (where HA = chelating agent, B = neutral extractant). Extraction power of these chelating agents increases as follows: PMCBP〉PMNBP〉PMTFP=PMBP〉PMAP. Synergistic extraction power of the neutral extractants increases as follows: TOPO〉DOSO〉TBP. The extraction equilibrium constants have been calculated. The mechanism of the synergistic extraction and possible structure of the extracted species are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02040377
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  • 9
    Electronic Resource
    Electronic Resource
    The time course of metabolites in human plasma after 6-[18F]fluoro-l-m-tyrosine administration (1999)
    Springer
    European journal of nuclear medicine 26 (1999), S. 1407-1412 
    Details
    ISSN: 1619-7089
    Keywords: Key words: Positron emission tomography ; 6-[18F]- fluoro-l-m-tyrosine ; Plasma metabolites
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. For the investigation of intracerebral dopamine metabolism, 6-[18F]fluoro-l-m-tyrosine (FmT) has been proposed as an alternative tracer that, unlike 6-[18F]fluoro-l-dopa, is not subjected to O-methylation. We have studied the time course of FmT and its labelled metabolites in plasma after intravenous injection into humans, employing a method that we have developed and validated to analyze labelled metabolites of FmT in plasma. The study population comprised 38 subjects, 14 of whom were taking an aromatic amino acid decarboxylase inhibitor (carbidopa), and obtained arterialized venous blood samples at various times after an intravenous injection of between 185 and 370 MBq of FmT. The major metabolite of FmT present in plasma was 6-[18F]fluoro-3-hydroxyphenylacetic acid. The time course of the fraction of radioactivity in plasma attributable to FmT was fitted well by the decay of two exponential functions. The fast component of the decay accounted for 40%–50% of the radioactivity and had a half-life of about 5 min. The slow component of the decay had a half-life of about 6 h in the subjects not taking carbidopa and 20 h in the patients taking carbidopa. When the total available FmT was calculated for each individual subject and expressed as a proportion of total radioactivity, this quantity did not differ significantly from that determined from the corresponding population mean. There was significantly more (15% on average) FmT available over the course of the 2-h experiment in the group pretreated with carbidopa. Our results demonstrate that the major metabolite in plasma after an intravenous injection of FmT is 6-[18F]fluoro-3-hydroxyphenylacetic acid. The clearance of FmT from plasma compares well with the clearance of intravenously administered levodopa. Carbidopa increases significantly the availability of FmT in plasma. These results verify, in a large number of human subjects, earlier analyses of FmT metabolism in other species. We validate a population-derived approach that can adequately describe the time course of FmT in plasma, alleviating the need for metabolite analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002590050472
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  • 10
    Electronic Resource
    Electronic Resource
    Investigation on a Fabrication Technique of TiAl Sheet (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 805-808 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A TiAl sheet fabrication technique from Ti/Al foils was studied experimentally. Firstly, the reaction sequence between Ti and Al foils were studied with DSC and then a three stage solid transformations processing was carried out. At the first stage, Al diffused into Ti foils and formed Al3Ti. The heating temperature was selected based on a ruler that the pure Al was consumed by solid diffusion with a short time and avoiding the melting of Al. The resulted microstructure consists of pure Ti and Al3Ti. At the second stage, part of Al in Al3Ti diffused into pure Ti and formed the high temperature phase. At the third stage, the sample was heated into the high temperature -phase zone and hold a given time and then cooling with the furnace. A full density γ-TiAl based alloy sheet with lamellar microstructure was successfully fabricated under above processing. The lamellar orientations are aligned around 0-45o compared to the longitudinal direction of the sheet
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.805.pdf
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