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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical chemistry accounts 31 (1973), S. 311-324 
    ISSN: 1432-2234
    Keywords: Point charge models ; One-electron properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Point charge models for LiH. CH4, and H2O are presented. The models preserve the correct total charge and dipole moment of the molecules. Relations between spherical Gaussian wave function values and point charge model values of a variety of one-electron molecular properties are derived. The errors inherent in some of the point charge model values are of two types: those which may be large but are easily evaluated and those which are small and diminish rapidly as the distance from the molecule increases. The models are shown to be a reliable means of calculating one-electron properties and possible uses of the models are suggested.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2568
    Keywords: RADIONUCLIDE IMAGING ; GASTROINTESTINAL MOTILITY ; DIAGNOSIS ; OUTCOME AND PROCESS ASSESSMENT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We performed a retrospective utilization studycovering a four-year period to determine how physiciansfamiliar with colon transit scintigraphy (CTS) use it tomanage patients with chronic constipation. Following CTS, there was a change is bothfrequency and likelihood of diagnosis. The diagnosis waschanged in 51% of patients — 37% of thoseconsidered to have slow transit constipation (STC)before CTS, 43% with obstructed defecation, and 64% withfunctional bowel disease (FBD). CTS increased thediagnostic likelihood in all groups. Of patients withthe diagnosis of STC, 16% were considered “almost certain” before CTS while 83% wereconsidered “almost certain” after CTS. ForFBD comparable percentages were 13% and 62%. CTS mayplay a major role in the diagnostic work-up of patientswith chronic constipation, both altering diagnosis andincreasing diagnostic certainty.
    Type of Medium: Electronic Resource
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