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  • 1
    Electronic Resource
    Electronic Resource
    The motions of particles in concentrated dispersions as observed by dynamic light scattering (1990)
    s.l. : American Chemical Society
    Langmuir 6 (1990), S. 35-42 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00091a006
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Sterically Stabilized Colloidal Particles as Model Hard Spheres (1994)
    s.l. : American Chemical Society
    Langmuir 10 (1994), S. 3550-3554 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00022a030
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Tracer diffusion in concentrated colloidal dispersions. II. Non-Gaussian effects (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 7841-7846 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The incoherent dynamic structure factor for concentrated dispersions of interacting, monodisperse, hard, spherical, colloidal particles has been measured by dynamic light scattering and displays weak but systematic departures from Gaussian behavior. At particle concentrations just below the crystallization transition, these non-Gaussian effects are comparable with those measured and calculated for simple atomic liquids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454297
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Tracer diffusion in concentrated colloidal dispersions. III. Mean squared displacements and self-diffusion coefficients (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 552-559 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The incoherent dynamic structure factor Fs has been measured on concentrated dispersions of particles with interactions approximating hard spheres. The particle mean squared displacements and self-diffusion coefficients are obtained from Fs at times and scattering vectors where the Gaussian approximation (for Fs ) is expected to be reasonable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457492
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The haemodynamic effects of bronchoscopy Comparison of propofol and thiopentone with and without alfentanil pretreatment (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 46 (1991), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The haemodynamic response to bronchoscopy under general anaesthesia was investigated. Forty patients were allocated at random to receive either thiopentone or propofol; half the patients in each group received in addition 18 μg/kg of alfentanil one minute before induction of anaesthesia. The heart rate, noninvasive blood pressure and Holter ECG was monitored in all patients. Significant increases in heart rate (p 〈 0.05), systolic and diastolic arterial pressures (p 〈 0.01) occurred in the thiopentone only group, following bronchoscopy. Systolic and diastolic arterial pressure decreased in patients receiving thiopentone plus alfentanil, following induction of anaesthesia and laryngoscopy (p 〈 0.05). No significant haemodynamic changes were seen in either of the groups which received propofol. ST segment changes on subsequent Holter analysis were seen in four patients, but there were no significant differences between the groups. Anaesthesia with propofol alone provides adequate haemodynamic stability for bronchoscopy and the addition of alfentanil is superfluous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1991.tb11493.x
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  • 6
    Electronic Resource
    Electronic Resource
    Anaesthesia for myocardial revascularisation (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 47 (1992), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We studied the effects on mycardial performance and metabolism of fentanyl/propofol and fentanyl/enflurane anaesthesia in 20 patients before coronary artery bypass grafting. Anaesthesia was induced with fenlanyl 20 ug.kg−1 and pancuronium 0.15 mg.kg−1. Patients received, by random allocation, either propofol by infusion, 6 mg.kg−1.h−1 reduced by half after JO min then adjusted as necessary (mean rate 2.8 mg.kg−1.h−1), or enflurane 0.8% inspired concentration for 10 min reduced to 0.6% and adjusted as required (mean 0.7%). Measurements were made before induction, after tracheal intubation, after skin incision and after sternotomy. There were no significant differences between the groups in any haemodynamic variables during the study. Following intubation both groups showed a rise in heart rate (p 〈 0.01) and cardiac index (p 〈 0.05). Systemic vascular resistance decreased after intubation (p 〈 0.05) then returned to baseline during surgery; stroke index was unchanged after intubation but was reduced during surgery (p 〈 0.01) as systemic vascular resistance increased. Regional and global coronary blood flow were maintained in both groups, as were myocardial oxygen consumption and lactate extraction ratio. However, lactate production did occur in one patient receiving enflurane and Holler monitoring confirmed ischaemia. One patient receiving propofol showed lactate production not accompanied by any Ecg changes. This study suggests that propofol may be a suitable alternative to enflurane as an adjunct to opioids in anaesthesia for coronary artery bypass grafting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1992.tb03194.x
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  • 7
    Electronic Resource
    Electronic Resource
    Sick sinus syndrome manifest after spinal anaesthesia (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 43 (1988), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A case of sick sinus syndrome which presented as a cardiac arrest following spinal anaesthesia is reported. The diagnosis of sick sinus syndrome, the cardiovascular effects of spinal anaesthesia and the anaesthetic management of patients with the syndrome are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1988.tb08981.x
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  • 8
    Electronic Resource
    Electronic Resource
    Tracer diffusion in concentrated colloidal dispersions (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 4065-4072 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A colloidal tracer system suitable for light scattering experiments has been prepared. The nonaqueous dispersion comprises host and tracer particles of 0.66 μm diameter in which the refractive index of the dispersion medium is adjusted to that of the host particles. Both the host polymer particles and the inorganic tracer particles are sterically stabilized by the same polymeric adsorbed layer and, therefore, differ only in their scattering properties. Dynamic light scattering measurements were carried out on these systems at volume fractions in the range 0.36 to 0.48; this includes the coexisting disordered and crystalline phases of the dispersion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450877
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  • 9
    Electronic Resource
    Electronic Resource
    Refractive index variation in nonaqueous sterically stabilized copolymer particles (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 1072-1080 
    Details
    ISSN: 1435-1536
    Keywords: Dispersion polymerization ; non-aqueous co-polymer latex ; steric stability ; light scattering ; refractive index variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract We present procedures for preparing sterically stabilized polymer particles whose refractive index can be controlled over a range of a few percent. Particle sphericity and size distribution are such that suspensions crystallize at high concentrations. This at least ensures that Brownian motion dominates over particle settling and that the polydispersity is no more than about 10%. Of particular interest are new particles comprising poly(methylmethacrylate-co-trifluoroethylacrylate) that can be optically matched in single solvent, namely cis-decalin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658372
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  • 10
    Electronic Resource
    Electronic Resource
    Change in crystallization mechanism at the glass transition of colloidal spheres (1993)
    [s.l.] : Nature Publishing Group
    Nature 362 (1993), S. 616-618 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We prepared nearly transparent concentrated suspensions, suitable for light scattering studies, by closely matching the refractive index of the suspending liquid to that of the particles1'5. Thin layers of solvated polymer grafted to the particle surfaces prevent irreversible aggregation and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/362616a0
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