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  • 1
    Electronic Resource
    Electronic Resource
    The stereoscopic views of Wheatstone and Brewster (1985)
    Springer
    Psychological research 47 (1985), S. 125-133 
    Details
    ISSN: 1430-2772
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Summary The study of stereopsis, made possible by the invention of the stereoscope, freed binocular vision from the yoke of monocular phenomena. Wheatstone used this freedom to determine the factors involved in the perception of size and distance, and interpreted them within a cognitive framework. He devised an adjustable stereoscope which allowed him to apply the systematic experimental procedures of physics to the phenomena of depth perception. Brewster, by contrast, tried to force the newly discovered binocular phenomena back into the mould of monocular vision, using the lever of visible direction. His interpretations of visual phenomena, be they monocular or binocular, could be reduced to the two fundamental ‘laws’ of visible direction and distinct vision. While Wheatstone's cognitive approach influenced Helmholtz, and thereby modern cognitive theorists. Brewster's interpretations, based as they were in analyses of the retinal projection, find an echo in modern direct theorists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309263
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Resolving discrepant results of the Wheatstone Experiment (1985)
    Springer
    Psychological research 47 (1985), S. 135-142 
    Details
    ISSN: 1430-2772
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Summary Soon after Wheatstone published his results obtained with the twelve earliest stereograms. Brewster disputed the result obtained with one of them. This stereogram consisted of a thick vertical line presented to one eye and a thin vertical and thick inclined line to the other. Wheatstone reported seeing depth with this figure but Brewster did not. We conducted three experiments to explore the possible reason for the disagreement. Experiment 1 indicated that the stereogram produces a variety of perceptions including the depth as reported by Wheatstone and the rivalry as reported by Brewster. Experiment 2 showed that Brewster's procedure of keeping the eyes fixed while viewing the stereogram reduces the proportion of subjects reporting depth. In Experiment 3, the top half and the bottom half of the stereogram were presented in different trials. The top of the stereogram that contains no conflicting cues produced reliable depth, but the bottom that does, did not. It is concluded that the difference in the procedures they used and the nature of the stimulus were responsible for the conflicting results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309264
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  • 3
    Electronic Resource
    Electronic Resource
    A “visual” explanation of facial vision (1986)
    Springer
    Psychological research 48 (1986), S. 57-62 
    Details
    ISSN: 1430-2772
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Summary The existence of facial vision has been doubted, perhaps because of its identification with dermo-optical perception. To determine whether more credence should be granted to this alleged phenomenon, we studied both blind and sighted people. Ninety-two percent of the partially blind people reported experiencing facial vision, but only 30% of the totally blind people reported the experience. Eighty-five percent of the sighted people also reported experiencing facial vision when a shadow moved across their eyelids. In response to a questionnaire asking about subjective visual experiences, 43% of the sighted people reported seeing as though through a window on their face. The boundaries of two monocular fields mapped by apparent locations of pressure phosphenes agreed with the boundary of the area in which facial vision is experienced. The findings indicate that facial vision can be experienced by both blind and sighted persons and that it can be explained in part by the principles of visual direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309317
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  • 4
    Electronic Resource
    Electronic Resource
    A point mutation in exon 7 of the C1-inhibitor gene causing type I hereditary angioedema (1996)
    Springer
    Human genetics 〈Berlin〉 98 (1996), S. 452-453 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The polymerase chain reaction and nucleotide sequence analysis have been used to characterize a point mutation in the seventh exon of one allele of the C1-inhibitor gene in a family with type I hereditary angioedema. A single base change (C→T) at nucleotide 1482 in C1-inhibitor converted the codon for Gln-339 to a premature translation termination codon, TAG. Family studies suggest that this mutation is reponsible for type I hereditary angioedema in a studied pedigree.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004390050238
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  • 5
    Electronic Resource
    Electronic Resource
    Visual localization of briefly presented peripheral targets (1989)
    Springer
    Biological cybernetics 60 (1989), S. 261-265 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract Reported here are the results from two experiments designed to investigate Mateeff and Gourevich's (1983, 1984) claim that adult observers make large constant errors when judging the direction of briefly presented peripheral targets, with respect to a continuously visible scale. Experiment 1 involved a virtually exact duplication of Mateeff and Gourevich's paradigm. Experiment 2 involved adjusting the position of a light emitting diode (LED) so as to match the direction of a LED previously flashed in the periphery. No significant constant errors were found in either experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204123
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular design of novel metal-binding oligomeric human metallothioneins (2000)
    Springer
    Applied microbiology and biotechnology 54 (2000), S. 84-89 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Genes for dimeric and tetrameric human metallothionein (hMT) were designed and successfully overexpressed in Escherichia coli to generate functional oligomeric hMTs. An hMT synthesized with prokaryotic codons, a linker encoding a gly-gly-gly tripeptide, and Met-deficient hMT-II was ligated to create a dimeric hMT, from which a tetrameric hMT was then constructed. The increased molecular size of the constructs resulted in improved stability and productivity in E. coli. The oligomeric proteins formed inclusion bodies which were dissolved with dithiothreitol, and the purified apo-metallothioneins were reconstituted with Cd or Zn ions in a reducing condition. The oligomeric hMT proteins incubated with Cd ions showed a typical Cd-thiolate absorbance peak at 245–255 nm. The dimeric and tetrameric hMT proteins exhibited both Cd and Zn binding activities that were respectively two and four times higher than those of the hMT-II monomer protein. These novel oligomeric hMTs may be useful in bioremediation for heavy metals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002530000360
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamic contrast-enhanced subtraction MR angiography in intracranial vascular abnormalities (1999)
    Springer
    European radiology 9 (1999), S. 1909-1912 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Brain diseases ; Magnetic resonance angiography ; Contrast media ; Gadolinium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. We present our clinical experience with dynamic contrast-enhanced MR angiography (MRA) with subtraction for assessing intracranial vascular abnormalities. Ten patients with various cerebrovascular disorders underwent dynamic contrast-enhanced MRA on a 1.0-T system. Thirty sections (2 mm) were acquired in 29–30 s. Maximum intensity projection images and subtracted source images were compared with those obtained by conventional angiography. In all cases, the presence or absence of abnormalities in the targeted vessels, as well as the morphology of the sagittal sinuses, was clearly visualized as in conventional angiography, without any obstructions such as hyperintense hematomas or thrombi, or intraluminal turbulence. Although the temporal and spatial resolutions with current hardware are insufficient, these preliminary results suggest that dynamic contrast-enhanced MRA with subtraction may be useful for assessing vascular lesions with hemorrhage or thrombus, and the dural sinuses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050946
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  • 8
    Electronic Resource
    Electronic Resource
    Elevated plasma bile acids in hypergalactosaemic neonates: a diagnostic clue to portosystemic shunts (1997)
    Springer
    European journal of pediatrics 156 (1997), S. 716-718 
    Details
    ISSN: 1432-1076
    Keywords: Key words Galactoasemia ; Portosystemic shunt ; Total bile acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To determine whether plasma levels of total bile acids may provide a useful index for hypergalactosaemia due to porto-systemic shunts, these levels were determined in hypergalactosaemic neonates. Increased levels were found in all cases with portohepatic venous or portocaval shunts. The levels of both total bile acids and galactose were normalized when the shunts disappeared on the echograms. Both bile acids and galactose are almost completely absorbed by the liver via the first portal blood passage. Portosystemic shunts contribute to elevated levels of bile acids and galactose. Conclusion Increased plasma levels of total bile acids serve as a diagnostic clue to the presence of porto systemic shunts in neonates with hypergalactosaemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004310050697
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    One-Dimensional Multiplexed Anisotropic Gratings in Photoreactive Polymer Liquid Crystals (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 11-12 (Feb. 2006), p. 355-358 
    Details
    ISSN: 1662-8985
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: One-dimensional multiplexed anisotropic gratings were fabricated in photoreactivepolymer liquid crystals (PPLCs), and the diffraction properties were characterized. Based on theholographic technique, the overwriting process is combined with the highly-stable and –controllablemolecular alignment of the PPLCs. As a result, 1st- and 2nd-order diffraction intensities variablegratings dependent on the polarization direction of probe beam were obtained without significantchanging their total diffraction intensity. The multiplexed gratings can be used aspolarization-selective diffractive optical elements
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.11-12.355.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Differences in Hollow Volumes in Cooked Rice Grains with Various Amylose Contents as Determined by NMR Micro Imaging (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 65 (2000), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The presence of hollows in cooked rice grains found before in the cultivar Koshihikari was confirmed for 4 more cultivars with various amylose contents. The size, shape, and total volume of hollows differed between cultivars. Hollow volumes increased with grain volume and length before 100 °C was reached, but subsequently decreased during prolonged boiling. The previously proposed mechanism, describing sealing by gelatinized starch of cracks formed during soaking, seemed accurate for all 5 cultivars. Based on the hypothetical model of their formation, a relationship between amylose content and hollow formation was assumed. However, no correlation existed between final hollow volume and shape on 1 side and individual parameters such as flour gelatinization and amylose content on the other side.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2000.tb16017.x
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