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
    Springer
    Catalysis letters 51 (1998), S. 213-218 
    ISSN: 1572-879X
    Keywords: zeolite ZnY ; solid-state ion exchange ; salt inclusion ; 129Xe NMR spectroscopy ; adsorption of carbon monoxide and xenon
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Zeolites ZnY with various overall zinc contents were prepared from mixtures of zeolite NH4Y and crystalline zinc chloride by solid-state ion exchange. The obtained materials were investigated with carbon monoxide, xenon, and nitrogen adsorption as well as with 129Xe NMR and XRF spectroscopy. From the results of these measurements, the zinc cation distributions between the different types of cages of the faujasite framework as well as between the crystallographic positions SIII and SII within the large voids (supercages) were quantitatively determined. The concentrations of zinc cations in the supercages of the presently prepared zeolites are considerably higher than in materials obtained from NaY by conventional wet ion exchange using aqueous zinc salt solutions. Experimental evidence is provided for salt inclusion under certain conditions of preparation.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Monatsschrift Kinderheilkunde 146 (1998), S. 467-470 
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Rezidivierende Parotitis ; Mumps ; Parotisschwellung ; Sialographie ; Key words Recurrent parotitis ; Mumps ; Parotid swelling ; Sialogram
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Background: Apart from mumps, recurrent parotitis is the most common inflammatory salivary gland disease in childhood. The cause is still unknown. Case report: We present a ten-year-old boy with a recurrent swelling of the left parotid gland, who had difficulties in chewing and a sensation of tension on the left face. Since one year the child wore orthodontic appliances. There were no serological signs of viral infection or an autoimmune process. Ultrasound demonstrated an enlarged left parotid gland with multiple hypoechoic areas. The sialogramm revealed the typical image of multiple cystic ectasies and stenoses of the duct. Treatment of choice were saliva liberating measures. Four months later parotitis relapsed and orthodontic applicances were removed. Since then the patient was free of relapses. Discussion: Recurrent parotitis shoud be treated symptomatically, because of its favourable prognosis. An inflammation of the parotid gland secondary to trauma to Stensen’s duct caused by orthodontic applicances is suggested.
    Notes: Zusammenfassung Hintergrund: Die rezidivierende Parotitis stellt nach der Parotitis epidemica die häufigste entzündliche Speicheldrüsenerkrankung im Kindesalter dar, deren Pathogenese ungeklärt ist. Fallbericht: Wir stellen einen 10 Jahre alten, seit 1 Jahr orthodontisch versorgten Jungen mit einer rezidivierenden einseitigen Schwellung der Glandula parotis vor, dessen Hauptbeschwerden durch Kauschmerzen sowie ein uncharakteristisches Spannungsgefühl der betroffenen Gesichtsseite gekennzeichnet waren. Serologisch fanden sich keine Hinweise auf eine Virusinfektion oder Autoimmunerkrankung. In der Sonographie zeigte sich eine vergrößerte Parotis mit multiplen echoarmen Arealen. Die durchgeführte Sialographie erbrachte das typische Bild von multiplen zystischen Gangektasien und -stenosen. Therapeutisch verordneten wir speicheltreibende Maßnahmen. Nachdem es 4 Monate später zu einem Rezidiv gekommen war, wurde die orthodontische Versorgung entfernt. Seitdem ist der Patient rezidivfrei. Diskussion: Aufgrund ihrer guten Prognose sollte die rezidivierende Parotitis mit möglichst konservativen Maßnahmen behandelt werden. Ursächlich könnte die Parotitis durch Mikrotraumen am Ausführungsgangsystem infolge Manipulation durch die orthodontische Versorgung ausgelöst worden sein.
    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...