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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 23 (1980), S. 193-194 
    ISSN: 1432-0630
    Keywords: 82.65 ; 79.40 ; 68.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The electric field near the anode of an electrohydrodynamic ion source is analytically discussed. For the field at the anode apex a rigorous analytical treatment results in the simple expressionE 0 ≅V AC/(P0R0)1/2 differing by a factor of 1/2/32 from that by Gomer. Here,V AC is the applied potential to the cathode with regard to the anode,R 0 the cathode distance from the anode center, andP 0 the radius of curvature at the apex of the anode surface. The analytical forms for the radius of curvature and the electric field direction as well as the electric field itself at arbitrary points on the anode are derived.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Teaching statistics 5 (1983), S. 0 
    ISSN: 1467-9639
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Teaching statistics 6 (1984), S. 0 
    ISSN: 1467-9639
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Teaching statistics 6 (1984), S. 0 
    ISSN: 1467-9639
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1435-2451
    Keywords: Magencarcinom ; Überlebensrate ; Rezidive
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary To evaluate whether it is appropriate to estimate the postoperative curability of gastric cancer based on the 5-year survival rate, we compared 5- and 10-year survival rates in 477 primary gastric cancer patients who had undergone gastrectomy during the 8-year period from 1960–1967. In patients who had died more than 5 years after surgery, the cause of death was investigated. The 10-year survival rate of 315 curatively operated patients was 59.1%, 3.9% lower than the 5-year survival rate. Of 176 patients who survived more than 5 years postoperatively, only 9 (5.1%) died of cancer recurrence, suggesting that the 5-year survival rate adequately reflects the curative success of gastric cancer surgery.
    Notes: Zusammenfassung Um herauszufinden, ob die 5-Jahres-Überlebensrate tatsächlich aussagekräftig betreffs der postoperativen Heilungsquote ist, wurden die 5- und 10-Jahres-Überlebensraten bei 477 Patienten mit primärem Magencarcinom verfolgt, die während einer 8-Jahresperiode von 1960 bis 1967 gastrektomiert wurden. Bei den Patienten, die mehr als 5 Jahre nach der Operation verstarben, wurde die Todesursache untersucht. Die 10-Jahre Überlebensrate von 315 kurativ operierten Patienten, lag bei 59,1% d. h. 3,9% niedriger als die 5-Jahres-Überlebensrate. Von 176 Patienten, die mehr als 5 Jahre nach der Krebsoperation überlebten, verstarben nur 9 (5,1%) an einem Krebsrezidiv. Somit wird demonstriert, daß die 5-Jahres-Überlebensquote tatsächlich den Heilerfolg bei der Magenkrebschirurgie adäquat reflektiert.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Hochleistungsfähige ionen-selektive Elektroden auf der Basis von Dodecylmethyl-bis-(12-kronen-4)- und Bis-(benzo-15-kronen-5)-ether wurden für die simultane Bestimmung von Natrium und Kalium in menschlichem Harn bzw. Serum mit Hilfe von Gran's plot method verwendet. Die Ergebnisse der potentiometrischen Bestimmung stehen mit denen der Flammenphotometrie in guter Übereinstimmung.
    Notes: Summary High-performance coated-wire ion-selective electrodes based on dodecylmethyl bis(12-crown-4) and bis(benzo-15-crown-5) are used for the simultaneous determination of Na+ and K+ in human urine or serum by means of the Gran's plot method. The results of the potentiometric determination for Na+ and K+ in human urine or serum are in good agreement with the values obtained by flame photometry.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 11 (1981), S. 357-360 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The oxidation states of lead in anodic oxide films formed in sulphuric acid solutions containing antimony(III) species were investigated by means of X-ray photoelectron spectroscopy. The presence of divalent lead ions in the anodic oxide films was confirmed. The content ofα-PbO2 in these anodic oxide films was found to be higher than that in films prepared in an antimony-free solution. The formation of the complex oxide, containing divalent lead ions andα-PbO2, was studied.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of applied electrochemistry 10 (1980), S. 749-755 
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The influence of antimony in solution on the oxidation behaviour of lead in 5 M H2SO4 was studied by measuring the current-time curves during potentiostatic oxidation at 1.5 and 1.6V, and by analysing the incorporated antimony in the resulting oxide layer as a function of depth. Antimony (III) species greatly influence the oxidation behaviour, but not so antimony (V). The amount of antimony incorporated was found to increase with the oxidation time in the electrolyte containing antimony (III), but in the antimony (V) solution it was almost constant at a relatively low level. The antimony incorporated from the antimony (III) solution was eluted by reoxidizing the oxide layer in an antimony-free solution, and the elution process was found to be accompanied by rearrangement of the oxide layer structure. The incorporation of antimony from the antimony (III) solution seems to be related to a complicated oxide formation process.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 305 (1981), S. 189-192 
    ISSN: 1618-2650
    Keywords: Best. von Arsen in Biolog. Material ; Spektrometrie, Atomabsorption ; Red. zu Arsin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A sensitive method for hydride generation and graphite tube furnace atomic absorption spectrometric measurements with a reducing tube has been developed for the determination of arsenic in tea and orchard leaves. Arsines were generated in a horizontal glass tube, in which a pellet of NaBH4 was placed. 1.5–2.0 l/min of argon flow rate and 2,400° C of atomization temperature were the best experimental conditions. The strong supression of the arsenic signal by Ni and Co was effectively eliminated with 1,10-phenanthroline. A detection limit of 0.3 ng was obtained with a precision of 3–4%.
    Notes: Zusammenfassung Arsin wird in einem horizontalen Glasrohr erzeugt, das eine NaBH4-Tablette enthält. Die AAS-Bestimmung erfolgt am günstigsten bei einem Argonstrom von 1,5–2,0 l/min und mit einer Atomisierungstemperatur von 2400° C. Die starke Unterdrückung des Arsensignals durch Ni und Co kann mit 1,10-Phenanthrolin wirksam eliminiert werden. Die Nachweisgrenze beträgt 0,3 ng bei einer Reproduzierbarkeit von 3–4%. Das Verfahren wurde auf die Arsenbestimmung in Tee und Obstbaumblättern angewendet.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 311 (1982), S. 492-495 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Selenium was determined in biological samples (tea and bovine liver, NBS, SRM 1577) by a combination of hydride generation with reducing tube, graphite furnace atomization and atomic absorption detection. The selenium was reduced by a pellet of sodium borohydride which was placed in a horizontal glass tube. 1.6–2.0 l/min of argon flow rate and 2400° C of atomization temperature were the best experimental conditions. Copper produces a severe effect on absorbance, even if present in only 2 times the amounts of selenium. Ion-exchange resin (Dowex 50 W-X8) was used for the separation of Cu, Ni and Co. A detection limit of 1 ng was obtained with a precision of 5–6%.
    Notes: Zusammenfassung Durch Kombination von Hydriderzeugung und Graphitofen-AAS wurde Selen in biologischen Proben (Tee, Rinderleber, NBS, SRM 1577) bestimmt. Die Reduktion erfolgte durch Natriumborhydrid in einem horizontalen Glasrohr. 1,6–2,0 l/min Argon und 2400° C Atomisierungstemperatur erwiesen sich als optimal. Kupfer übt selbst bei nur doppelter Menge einen störenden Einfluß aus. Zur Abtrennung von Cu, Ni und Co wurde ein Ionenaustauscher (Dowex 50W-X8) verwendet. Die Nachweisgrenze beträgt 1 ng bei einer Reproduzierbarkeit von 5–6%.
    Type of Medium: Electronic Resource
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