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  • 1
    Electronic Resource
    Electronic Resource
    Effects of patterned backgrounds on responses of lateral geniculate neurons in cat (1987)
    Springer
    Experimental brain research 67 (1987), S. 16-26 
    Details
    ISSN: 1432-1106
    Keywords: Lateral geniculate nucleus ; Single neurons ; Receptive field ; Patterned background ; Summation ; Disinhibition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the lateral geniculate nucleus (LGN) of paralyzed cats under urethane anaesthesia, an extensive disinhibitory region (DIR) outside the inhibitory surround of the receptive field (RF) was found in both sustained and transient cells. Its extent is comparable to that of McIlwain's periphery effect (1964). The responses to a light spot, flashed into different parts of the RF center, were used to assess the effect of different background patterns, located over the DIR, on responsiveness and receptive field organization. A straight line background cutting across the RF center led to a marked shrinkage in RF size and to a suppression of the center response. In sustained cells, these influences were not due to the light flux of the background, but were mainly due to the spatial property of the line itself. This was demonstrated by comparing the effect of a straight line background with that of a zigzag line or of distributed dots. The light flux for the different patterns and their spatial weighting was the same, so that they differed from each other solely in their form. A straight line background elicited much stronger suppression of the center response and more marked shrinkage of the RF than if the component dots are dispersed over a wider area, but keeping the radial distances of the individual dots from the RF-center constant. The data suggest that the dispersion of the component dots in different backgrounds plays an important role as response amplitude and RF diameter increase proportional to the dispersive area of the background patterns. For transient cells, all backgrounds used showed similar effects on center responses and RF diameter, indicating that for them it was the light flux of the backgrounds rather than their spatial property that caused the effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00269448
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  • 2
    Electronic Resource
    Electronic Resource
    Representation of spatial details in textured patterns by cells of the cat striate cortex (1984)
    Springer
    Experimental brain research 57 (1984), S. 9-21 
    Details
    ISSN: 1432-1106
    Keywords: Striate cortex ; Pattern representation ; Texture ; Visual acuity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The ability of single cells to represent the spatial details of textured stimuli was investigated. Two complementary aspects of cell response were considered, the ability to discriminate fine stimulus details and the property of integration over wider areas of a structure to encode differences in mean luminance. Responses of simple and complex cells were distinct in some respects. Spatial discrimination: Simple cells would encode orientation of line arrays as long as individual line elements could be spatially resolved. By contrast, complex cells were able to distinguish the orientation of texture areas even when the individual lines of the stimulus were not resolved in their response. Threshold sensitivity for texture orientation was of the same order in both cell classes despite differences in receptive field size. Spatial integration: Complex cells responded to texture luminance differences of much coarser patterns than did simple cells. These responses, however, were not biased for contour orientation unless finer patterns were used. Only with very fine textures did responses become indistinguishable from those to uniform stimuli for both simple and complex cells. For complex cells, there was a smooth transition from resolution to fusion of spatial details with increasing structural density. Simple cells were insensitive to both detailed and global properties of a stimulus pattern over a wide range of texture density. Implications for alternative measures of visual acuity of single cells are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231127
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  • 3
    Electronic Resource
    Electronic Resource
    Quality Improvement of Mackerel Surimi with NADPH-Sulfite Reductase from Escherichia coli (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 application of NADPH-sulfite reductase, produced from Escherichia coli, on mackerel surimi was investigated. The activity of this reductase was very stable. There was about 70%, 80%, and 90% activity left even after 8–wk storage at 25 °C and 12–wk storage at 4 or -30 °C, respectively. Increase in mackerel-surimi gel properties containing reductase was consistent with the amounts of reactive sulfhydryl groups detected. SDS-PAGE indicated that NADPH-sulfite reductase could reconstitute myosin heavy-chain and increase soluble actomyosin. From the data obtained, E. coli NADPH-sulfite reductase effectively improved the gel properties of mackerel surimi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2000.tb10620.x
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  • 4
    Electronic Resource
    Electronic Resource
    Evidence for the existence of antistructure defects in bismuth telluride by density measurements
    Amsterdam : Elsevier
    Journal of Physics and Chemistry of Solids 26 (1965), S. 173-177 
    Details
    ISSN: 0022-3697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-3697(65)90084-3
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  • 5
    Electronic Resource
    Electronic Resource
    A semi-hierarchic computer network for data acquisition and control in staircase voltammetry
    Amsterdam : Elsevier
    Analytica Chimica Acta 134 (1982), S. 167-178 
    Details
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0003-2670(01)84187-8
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  • 6
    Electronic Resource
    Electronic Resource
    Heterogeneity of hairy cell tartrate-resistant acid phosphatase
    Amsterdam : Elsevier
    Clinical Biochemistry 25 (1992), S. 437-443 
    Details
    ISSN: 0009-9120
    Keywords: band 5 acid phosphatase ; hairy cell leukemia ; tartrate-resistant acid phosphatase
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0009-9120(92)90075-4
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  • 7
    Electronic Resource
    Electronic Resource
    Comparison of the tartrate-resistant acid phosphatase in gaucher's disease and leukemic reticuloendotheliosis
    Amsterdam : Elsevier
    Clinical Biochemistry 14 (1981), S. 177-181 
    Details
    ISSN: 0009-9120
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0009-9120(81)91201-7
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  • 8
    Electronic Resource
    Electronic Resource
    Selective Nitrogen Assimilation by Poria weirii (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 814-814 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many fungi, including Basidiomycetes such as Collybia tuberosct (Fr.) Quel. and Lentinus tigrinus Fr., can use \ nitrate nitrogen2'3 and therefore presumably produce nitrat reductase, the enzyme required for reduction of nitrate to usable ammonium. Other fungi, however, cannot use nitrate nitrogen, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/213814a0
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  • 9
    Electronic Resource
    Electronic Resource
    YBaCuO superconducting thin films with zero resistance at 84 K by multilayer deposition (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 946-947 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: YBaCuO superconducting thin films were prepared by multilayer deposition on different kinds of substrates. High Tc with an onset of 94 K and a zero resistance at 84 K has been obtained by deposition on pure ZrO2 substrates. The nature of zero resistance as well as the dR/dT characteristic above Tc and the influence of substrates are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98810
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  • 10
    Electronic Resource
    Electronic Resource
    Nitric oxide synthase polymorphisms and asthma phenotypes in Chinese children (2005)
    Oxford, UK : Blackwell Science Ltd
    Clinical & experimental allergy 35 (2005), S. 0 
    Details
    ISSN: 1365-2222
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background Nitric oxide (NO) is a key factor for balancing T-helper type 1/T-helper type 2 immunity. Single nucleotide polymorphisms (SNPs) in nitric oxide synthase (NOS) genes have been associated with atopy and exhaled NO concentrations in Caucasians. We investigated the association between asthma traits and genetic polymorphisms in neuronal NO synthase (NOS1) and endothelial NO synthase (NOS3) in Chinese children.Methods Asthmatic children between 5 and 18 years of age and non-allergic controls were recruited. Plasma total IgE was measured by microparticle immunoassay, whereas allergen-specific IgEs were measured by fluorescent enzyme immunoassay. Fractional exhaled NO concentration (FeNO) was measured by a chemiluminescence analyser. NOS1 C5266T and NOS3 G894T were genotyped by restriction fragment length polymorphism, and (AAT)n polymorphism in intron 20 of NOS1 was determined by GeneScan analysis.Results The mean (SD) ages of 295 asthmatics and 174 controls were 11.1 (3.8) years and 11.6 (4.0) years, respectively (P=0.162). NOS1 C5266T and NOS3 G894T were not associated with asthma, atopy or FeNO. However, significantly more subjects with T/T in NOS1 C5266T had increased plasma total IgE as compared with those with C/T or C/C (P=0.017). This SNP was also associated with sensitization to Dermatophagoides pteronyssinus (P=0.049). Among asthmatic patients, log-transformed plasma total IgE levels were significantly higher among those homozygous for 5266T of NOS1 [mean (SD): 2.84 (0.44) for T/T, 2.68 (0.42) for C/T, 2.59 (0.69) for C/C; P=0.021]. This study found a significant inter-ethnic difference in the allele frequencies of AAT repeats, and this polymorphism was associated with high plasma total IgE levels (P=0.044) but not FeNO (P=0.158). NOS3 G894T was not associated with any asthma or atopy phenotype.Conclusions NOS1 C5266T and AAT repeats affect plasma IgE concentrations in Chinese children. On the other hand, neither NOS1 nor NOS3 SNP was associated with FeNO or the risk of having asthma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2222.2005.02342.x
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