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  • 1
    Electronic Resource
    Electronic Resource
    Congenital absence and aberrant course of the internal carotid artery (1996)
    Springer
    European radiology 6 (1996), S. 650-654 
    Details
    ISSN: 1432-1084
    Keywords: Aberrant internal carotid artery ; Congenital absence of the internal carotid artery ; CT ; MRI ; MR angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We retrospectively reviewed the imaging features of an aberrant course of the internal carotid artery (ICA) in one patient and its unilateral absence in four. Absence of the ICA was initially detected by MRI and MR angiography in both patients who underwent these examinations. CT revealed an abnormal or absent carotid canal in all cases. Radiological diagnosis by MRI and MR angiography could play an important role in the diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00187666
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  • 2
    Electronic Resource
    Electronic Resource
    CT and MR imaging of craniopharyngioma (1997)
    Springer
    European radiology 7 (1997), S. 464-469 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Craniopharyngioma ; MR ; CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We reviewed imaging findings of CT and MR imaging in 20 cases of surgically confirmed craniopharyngioma in an attempt to determine their relation to patterns of tumor extent. The relationship between these patterns and the frequency of preoperative CT diagnosis and MR imaging diagnosis according to the surgical diagnosis were determined. The CT technique was superior to MR imaging in the detection of calcification. The MR imaging technique was superior to CT for determining tumor extent and provided valuable information about the relationships of the tumor to surrounding structures. Thus, CT and MR imaging have complementary roles in the diagnosis of craniopharyngiomas. In cases of possible craniopharyngioma, noncontrast sagittal T1-weighted images may enable the identification of the normal pituitary, possibly leading to the correct diagnosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050184
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  • 3
    Electronic Resource
    Electronic Resource
    The anterior choroidal artery syndrome (1994)
    Springer
    Neuroradiology 36 (1994), S. 340-345 
    Details
    ISSN: 1432-1920
    Keywords: Infarcts, anterior choroidal artery ; CT ; MRI ; Angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We reviewed 12 cases of infarcts in the territory of the anterior choroidal artery (AChA) on CT and/or MRI. In each case vascular occlusion in the region was verified angiographically. Although the extent of the lesion on CT/MR images was variable, all were located on the axial images within an arcuate zone between the striatium anterolaterally and the thalamus posteromedially. The distribution of the lesions on mutiplanar MRI conformed well to the territory of the AChA demonstrated microangiographically. The variability of the extent of the infarcts may be explained by variations in the degree of occlusive changes in the AChA or the development of collateral circulation through anastomoses between the AChA and the posterior communicating and posterior cerebral arteries. The extent of the lesion appeared to be closely related to the degree of neurological deficit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00612114
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  • 4
    Electronic Resource
    Electronic Resource
    Liquid viscosities and densities of HFC-134a+glycol mixtures (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 45-53 
    Details
    ISSN: 1572-9567
    Keywords: density ; diethylene glycol ; ethylene glycol ; HFC-134a ; polyethylene glycol ; polypropylene glycol ; tetraethylene glycol ; triethylene glycol ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Liquid viscosity and density of six binary mixtures of HFC-134a with glycols [ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (400), and polypropylene glycol (2000)] have been measured in the temperature range from 273 to 333 K. The viscosity was measured by a rolling-ball viscometer calibrated with standard liquids of viscosities and densities (JS5, JS10, JS20, and JS50). The density was measured with a glass pycnometer. The uncertainties of the measurements were estimated to be less than 3.4 % for viscosity and 0.04 % for density, respectively. An equation is given to represent the obtained viscosity values as a function of weight fraction and temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00522660
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  • 5
    Electronic Resource
    Electronic Resource
    Revised viscosities for HFC-134a + glycol mixtures from 273 to 333 K (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 109-115 
    Details
    ISSN: 1572-9567
    Keywords: ethylene glycol ; diethylene glycol ; HFC-134x ; polyethylene glycol(400) ; polypropylene glycol(2000) ; tetraethylene glycol ; triethylene glycol ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The liquid viscosity of six binary mixtures of HFC-134a with glycols [ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol(400), and polypropylene glyco](2000)] was measured in the temperature range from 273 to 333 K. The viscosity was measured with an improved capillary viscometer instead of the rolling-ball viscometer reported in our previous work. The measurement uncertainty was estimated to be 1.6%. Most of the present data are higher than previous data, and the gap between the two sets of data increases further in low-viscosity regions. The present results obtained with laminar flow are more reliable than previous results, which are indefinite because of the limit of usefulness of the rolling-ball viscometer in low-viscosity regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439249
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  • 6
    Electronic Resource
    Electronic Resource
    Viscosity of nitrous oxide in the critical region (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 603-626 
    Details
    ISSN: 1572-9567
    Keywords: critical anomaly ; mode-coupling theory ; nitrous oxide ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The gaseous viscosity of nitrous oxide (N2O) was measured in the critical region. The experimental temperature range was between 309.650 and 318.150 K and the pressure range was up to 9.6 MPa. The measurements were obtained with an oscillating-disk viscometer, combined with local determination of the density at the position of the oscillating disk, and they have an estimated accuracy of 0.6 % for viscosity and 0.5 % for gas density. The viscosity of N2O exhibits an anomalous increase near the critical point. The anomalous increase in viscosity was analyzed with the viscosity equation proposed by Basu and Sengers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01563790
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  • 7
    Electronic Resource
    Electronic Resource
    Viscosity of saturated liquid fluorocarbon refrigerants from 273 to 353 K (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 105-117 
    Details
    ISSN: 1572-9567
    Keywords: capillary viscometer ; fluorocarbons ; refrigerants ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Viscosity measurements were carried out on saturated liquid fluorocarbon refrigerants using an improved capillary viscometer for 11 kinds of fluorocarbon refrigerants; CCl3F (R11), CCl2F2 (R12), CHClF2 (R22), CBrF3 (R13B1), CH3CHF2 (R152a), CCl2FCClF2 (R113), CHCl2CF3 (R123), CHClFCClF2 (R123a), CH3CF3 (R143a), CClF2CCl2F2 (R114), and CH2FCF3 (R134a), in the temperature range from 273 to 353 K. An equation is given to represent the viscosity as a function of temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00506125
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  • 8
    Electronic Resource
    Electronic Resource
    Saturated liquid viscosities and densities of environmentally acceptable hydrochlorofluorocarbons (HCFCs) (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 339-342 
    Details
    ISSN: 1572-9567
    Keywords: density ; HCFC ; HCFC-141b ; HCFC-142b ; HCFC-225ca ; HCFC-225cb ; hydrochlorofluorocarbon ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements of saturated liquid viscosities and densities were performed on environmentally acceptable hydrochlorofluorocarbons (HCFCs), CH3CCl2F (HCFC-141b), CH3CClF2 (HCFC-142b; only for viscosity), CF3CF2CHCl2 (HCFC-225ca), and CClF2CF2CHClF (HCFC-225cb), using a capillary viscometer and a glass pycnometer in the temperature range from 273 to 353 K. The uncertainty in the measurement of viscosity is estimated to be 5% based on the comparison of the present data with those in the literature for HCFC-141b. An equation is given to represent our saturated liquid viscosity data as a function of temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00507818
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  • 9
    Electronic Resource
    Electronic Resource
    Viscosity and density of liquid mixtures ofn-alkanes with squalane (1995)
    Springer
    International journal of thermophysics 16 (1995), S. 773-779 
    Details
    ISSN: 1572-9567
    Keywords: capillary viscometer ; density ; n-butane ; n-hexane ; squalane ; viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Viscosity and density measurements are reported for binary liquid mixtures ofn-butane andn-hexane with squalane in the temperature range from 273 to 333 K. The viscosity measurements have been carried out by using a capillary viscometer calibrated with standard liquids. that is. JS5, JSIO, JS20, and water. The uncertainty in the viscosity data was estimated to be ± 1.7%. The density needed for the calculation of the viscosity has been measured by using a glass pycnometer within an accuracy of ±0.04%. In the prediction of the viscosity, the scheme of Assael et al. fails for mixtures of this type differing greatly in size.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438862
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