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  • 1
    Digitale Medien
    Digitale Medien
    Photon beam position monitor : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 1951-1952 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A highly sensitive beam position monitor has been designed for use with synchrotron radiation sources. This beam position monitor consists of two gas-flow ionization chambers having three parallel plate conductors. The incident beam is divided by a central plate. Therefore, a displacement of the beam position is detected with the two outside ionization chambers. The position monitor was tested at the BL6Cl beamline of the Photon Factory (PF). The results show a good performance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1140897
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  • 2
    Digitale Medien
    Digitale Medien
    Effect of sotalol on ischemic myocardial pH in the dog heart (1982)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 318 (1982), S. 340-343 
    Details
    ISSN: 1432-1912
    Schlagwort(e): Dog heart ; Ischemia ; Myocardial pH ; Sotalol ; Heart rate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary In dogs anesthetized with pentobarbital, the left anterior descending coronary artery (LAD) was occluded partially so that the LAD flow could be reduced to 1/2 to 1/3 the original flow (partial occlusion). Myocardial pH was recorded continuously by the use of a micro glass pH electrode inserted in the area to become ischemic by partial occlusion. Before partial occlusion, myocardial pH was 7.51–7.66. Partial occlusion reduced the pH by 0.63–0.72. Sotalol (5 mg·kg−1, i.v.) increased the pH (by 0.45) that had been reduced by partial occlusion, with a marked decrease in heart rate (about 70 beats·min−1) and a slight decrease in blood pressure (about 10 mm Hg in systolic pressure). Even when the sotalol-induced decrease in heart rate was prevented by pacing the heart, sotalol (5 mg·kg−1, i.v.) increased the pH (by 0.43) of myocardium in which LAD was partially occluded. The pH of the non-ischemic normal heart, however, was not influenced by the injection of sotalol (5 mg·kg−1, i.v.) It is concluded that the effect of sotalol to increase the pH of the ischemic heart is not related to the decrease in heart rate produced by the drug injection.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00501175
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  • 3
    Digitale Medien
    Digitale Medien
    A new diffractometer using a curved position-sensitive detector and its applications to X-ray crystallography (1984)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 17 (1984), S. 470-475 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: A new curved linear position-sensitive detector has been developed and used in a computer-controlled high-speed data collection system with Weissenberg geometry for X-ray crystallography. This detector system enables one to see the entire Weissenberg diagram on a CRT display monitor in real time. A comparison between refinement results of the room-temperature phase of LiRbSO4 by this system and a conventional four-circle diffractometer showed that the atomic coordinates almost agree within the experimental errors. A new phenomenon was found with this system: LiRbSO4 changes into the twin state under external electric field at room temperature.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188988401195X
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  • 4
    Digitale Medien
    Digitale Medien
    Intensification of the 5.9-nm actin layer line in contracting muscle (1984)
    [s.l.] : Nature Publishing Group
    Nature 312 (1984), S. 471-473 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Two-dimensional detectors of multiwire type8"10, despite their advantage over the one-dimensional detector, have not been applied to structural studies on muscle because the spatial resolution in the direction perpendicular to anode wires is limited. We have improved the resolution by the method11 ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/312471a0
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  • 5
    Digitale Medien
    Digitale Medien
    Ensemble noise and current relaxation analysis of K+ current in single isolated salivary acinar cells from rat (1986)
    Springer
    Pflügers Archiv 406 (1986), S. 69-72 
    Details
    ISSN: 1432-2013
    Schlagwort(e): K+ channels ; Acinar cells ; Ensemble noise analysis ; Current relaxation ; Patch-clamp whole cell recording
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The K+ channel in rat parotid gland acinar cells were investigated by ensemble current noise analysis in single isolated cells employing the giga-seal whole cell current recording mode. Sets of 20–40 identical de- and hyperpolarization voltage steps were applied and the resultant current records were processed by computer to obtain the mean and the variance of the current. The time-course of the mean current could be fitted by the sum of two exponentials, suggesting a 3-state model. The simplest plausible hypothesis is a model with one open and two closed states. Assuming this model, the relationship between the variance (σ2) and the mean current (I) could be fitted by the function σ2/I=i−I/N. The estimated single channeli/V-relations were similar to those taken from single channel current recordings, and the size of the population of channels per cell (N) was 76±26 (n=12). The validity of the model was tested by a successful simulation of the time-course of the variance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00582956
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  • 6
    Digitale Medien
    Digitale Medien
    Interactions of water-soluble polymers with small molecules II: Poly(2-diethylaminoethyl methacrylate)-methyl orange and its homolog systems at different temperatures (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 756-763 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Equilibrium dialysis ; hydrophobic interaction ; electrostatic interaction
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract In order to investigate the interactions of poly(2-diethylaminoethyl methacrylate) (PDEAEMA) with methyl orange and its homologs in solution, temperature dependence of the complex formation has been examined in detail by the measurements of transmittance and specific conductance for the systems. Furthermore, the binding course of dyes to PDEAEMA has been studied on the basis of thermodynamic parameters obtained from equilibrium dialysis experiments at different temperatures. It was observed that the flocculation process shifted to lower dye concentrations in accordance with increasing hydrophobicity of the dyes in the order, methyl orange 〈 ethyl orange 〈 butyl orange, and the process of complex formation was characterized by three separate regions according to the slope of specific conductivity-mixing ratio curve for mixtures of PDEAEMA and dye. The temperature dependences of ΔF,ΔH and ΔS suggest that, for dyes-PDEAEMA complex formation, the hydrophobic interaction is predominant at a low temperature but the electrostatic interaction becomes important as the temperature increases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01500750
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  • 7
    Digitale Medien
    Digitale Medien
    Interactions of water-soluble polymers with small molecules I: Poly(2-diethylaminoethyl methacrylate)-orange II and ethyl orange systems (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 748-755 
    Details
    ISSN: 1435-1536
    Schlagwort(e): Poly(2-diethylaminoethyl methacrylate) ; flocculation ; deflocculation ; hydrogen bonding ; hydrophobic bonding
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Notizen: Abstract The interactions between poly(2-diethylaminoethyl methacrylate) (PDEAEMA) and orange II (OII) or ethyl orange (EO) have been examined in detail by measuring the transmittance and the specific conductance of the solutions. The mechanisms of flocculation and deflocculation have been investigated by changing the intrinsic viscosity, the degree of neutralization and alkyl groups of PDEAEMA or by adding NaCl, urea or alcohols. The complexation of PDEAEMA with dyes is completed at the same mole ratio but is not dependent on the molecular weight of PDEAEMA. OII molecules bind with PDEAEMA by electrostatic interactions, followed by flocculation through hydrogen bondings between hydroxyl groups on OII molecules bound. EO molecules first interact with PDEAEMA electrostatically in the same ways as OII, but flocculation occurs by hydrophobic interactions between ethyl groups on EO molecules bound. By further addition of dyes to the complex, OII or EO molecules already bound can interact with free OII or EO molecules newly added through hydrogen/hydrophobic interaction between OII or EO molecules. Deflocculation occurs by the electrostatic repulsion between anions of dyes bound, such as (PDEAEMA-OII)-hydrogen bonding-(OII-anions) or (PDEAEMA-EO)-hydrophobic bonding-(EO-anions) newly formed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01500749
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  • 8
    Digitale Medien
    Digitale Medien
    Detection of dibenzothiophene in mussel,Mytilus edulis, as a marker of pollution by organosulfur compounds in a marine environment (1983)
    Springer
    Bulletin of environmental contamination and toxicology 31 (1983), S. 518-525 
    Details
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01605468
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  • 9
    Digitale Medien
    Digitale Medien
    Cystic parathyroid adenoma with coexistent sarcoid granulomas (1987)
    Springer
    European archives of oto-rhino-laryngology and head & neck 243 (1987), S. 392-394 
    Details
    ISSN: 1434-4726
    Schlagwort(e): Primary hyperparathyroidism ; Parathyroid adenoma ; Sarcoidosis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary A 55-year-old woman with sarcoidosis developed hyperparathyroidism that was associated with fluctuating serum calcium levels. Ultrasonography and a computed tomography (CT) scan of the neck demonstrated a cystic lesion in the lower posterior area of the left thyroid lobe. Histological examination after subsequent surgery revealed sarcoid granulomas within a parathyroid adenoma. The pathogenesis of this rare association is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00464649
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