Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3472-3478 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The retrapping of highly charged Xe44+ and Th68+,72+ ions extracted from an "electron-beam ion trap'' (EBIT) is demonstrated after injection of the ions into RETRAP, a cryogenic Penning trap (up to 6 T magnetic field) currently with an open cylinder design. Ion extraction in a short pulse (5–20 μs) from EBIT, essential for efficient retrapping, is employed. The ions are slowed down upon entering a deceleration tube mounted above the trap within the magnetic field. The potential is then rapidly (100 ns) decreased, enabling low-energy ions to enter the trap. Capture efficiencies up to 25% are observed via detection of the delayed ion release pulse with a detector below the trap. Signal voltages induced in a tuned circuit due to single and multiple ions have been observed by tuning the ion resonant axial oscillation frequencies for different ions. Results from transporting and retrapping of the ions, as well as their detection, are described and the trapping efficiency is discussed. The motivation for these studies is to cool the trapped very highly charged ions to low temperatures (〈4 K) in order to perform ultrahigh-resolution precision spectroscopy, collision studies at ultralow energies, and to observe phase transitions in Coulomb clusters of highly charged ions.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 2 (1963), S. 32-36 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 47 (1959), S. 101-106 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The inhibition of the catalytic action of iodine on the redox-reaction ceric sulphate—arsenious acid was investigated with regard to the advantages and disadvantages in its analytical application. Brucine acetate gives, according toFischl, a quantitative colour reaction with ceric ions in sulphuric acid. Critical investigations carried out show that the solution only develops a stable, orange-red colour (absorption maximum 470 nm) between 10 and 12 minutes heating. Application of this procedure to the determination of iodine in blood serum by the method ofSpitzy, Reese, andSkrube introduces complications and has, therefore, no special advantage.
    Abstract: Résumé Etude des avantages et des inconvénients de l'emploi en chimie analytique de l'inhibition de l'effet catalytique de l'iode sur la réaction d'oxydo-réduction cerium(IV)-sulfate—acide arsenieux. Avec les ions cériques l'acétate de brucine donne, en solution sulfurique, d'aprèsFischl, une réaction colorée susceptible d'être employée pour une détermination quantitative. Des recherches critiques ont montré que les solutions devaient être chauffées pendant au moins 10 min. et au plus 12 min. à 105° pour développer complètement la couleur rouge orangé et obtenir sa stabilité (maximum d'absorption à 470 nm). L'application à la détermination de l'iode dans le sérum sanguin d'aprèsSpitzy, Reese etSkrube n'offre aucun avantage particulier du fait de la complication de la méthode.
    Notes: Zusammenfassung Die Hemmung der katalytischen Jodwirkung auf die Redoxreaktion Cer(IV)-sulfat—arsenige Säure wird hinsichtlich ihrer Vorund Nachteile bei analytischer Anwendung untersucht. Brucinacetat gibt mit Ceriion in schwefelsaurer Lösung nachFischl eine quantitativ auswertbare Farbreaktion. Kritische Untersuchungen hierzu ergeben, daß die Lösungen zur vollen Entwicklung und Stabilität der orangeroten Farbe (Absorptionsmaximum 470 nm) mindestens 10 bis höchstens 12 Min. auf 105° zu erhitzen sind. Die Anwendung auf die Jodbestimmung im Blutserum nachSpitzy, Reese undSkrube bietet infolge methodischer Komplizierung keinen besonderen Vorteil.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...