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  • 1990-1994  (8)
  • 1994  (6)
  • 1993  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Platelet superoxide dismutase in migraine and tension-type headache (1994)
    USA/Oxford, UK : American Association for the Study of Headache/Blackwell Science Ltd
    Cephalalgia 14 (1994), S. 0 
    Details
    ISSN: 1468-2982
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Superoxide dismutase (SOD) is a radical-scavenging enzyme. We determined Cu, Zn-SOD concentrations and activities in platelets from subjects with migraine and tension-type headaches. Thirty migraine without aura (MWoA) patients, 9 migraine with aura (MWA) patients, and 53 tension-type headache patients were selected for study. Thirty healthy volunteers composed the control group. Concentrations of platelet SOD were determined using enzyme-linked immunosorbent assay techniques. The activity of platelet SOD was determined by measuring reductivity of nitroblue tetrazolium. Low concentrations of platelet SOD were found in patients with MWA and MWoA. Platelet SOD activity decreased in MWA patients but not in patients with MWoA or tension-type headaches. These findings suggest vulnerability to oxidative stress in patients with migraine. It is suggested that low platelet SOD levels may play an important role in the etiology of migraine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1468-2982.1994.014003215.x
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  • 2
    Electronic Resource
    Electronic Resource
    High-sensitive Pockels field sensor with a dielectric mirror (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2351-2355 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The highly sensitive field sensor with a Pockels crystal which was devised by us has been modified by using a light reflection technique. By replacing a metallic mirror with a dielectric mirror which is sputtered on one end face of the Pockels crystal, the new field measuring system has an advantage of precisely measuring the field distribution in the long gap discharge. This is the case when the field sensing part consisting of the Pockels crystal is isolated from the main field measuring system and both are connected to each other with a long light guide cable. Based on our experiments, we found that the measurable minimum field strength in the long gap discharge is 2 V/cm with the accuracy of 16 dB and 0.2 V/cm with the critical accuracy of 0 dB. Furthermore, we point out that the size of the field sensing part can be reduced down to 1 mm in diameter by using a dielectric mirror and a light guide cable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144687
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Diffusion barrier effects of transition metals for Cu/M/Si multilayers (M=Cr, Ti, Nb, Mo, Ta, W) (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1511-1513 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In order to find appropriate diffusion barrier materials for Cu, the diffusion of Cu into Si through various barrier metals M (M=Cr, Ti, Nb, Mo, Ta, W) was investigated. The behavior of Cu in Cu/M/Si multilayers was measured after annealing using x-ray diffraction analysis, secondary ion mass spectroscopy, Rutherford backscattering spectroscopy, and electric resistance change. Only Cu/Ta/Si and Cu/W/Si multilayers retained their multilayer structures after annealing at 600 °C×1 h in H2 without resistivity increases. Multilayers of the other metals did not retain their structures after the same annealing condition. This difference in the barrier properties of the transition metals appeared to be related to the metal-Cu binary phase diagrams and their self-diffusion coefficients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111875
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  • 4
    Electronic Resource
    Electronic Resource
    Superoxide dismutasc activity in lite skin of fish (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 43 (1993), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Superoxide dismutase (SOD) activity in the skin of fish was observed to be higher in the dark than in the light parts. SOD activities in both parts were confirmed by visualisation of SOD activity on polyacrylamide gels. We suggest that the distribution of higher SOD in the dark parts of the skin might be related to melanization and to regulate of reactive oxygen species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1993.tb00585.x
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  • 5
    Electronic Resource
    Electronic Resource
    Reaction of glyoxal and glyoxal/glycol with wood (1993)
    Springer
    Wood science and technology 28 (1993), S. 23-33 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary In terms of the problem of formaldehyde-releasing, glyoxal is one of the interesting dialdehydes as a crosslinking agent for wood. In the present report, the reaction of glyoxal and glyoxal/glycol with the wood of Japanese ash (Fraxinus mandshurica Rupr. var. japonica Maxim.) has been studied. Particular attention to the structure of the product (after treatment with glyoxal/glycol (glycol: ethylene glycol, diethylene glycol, triethylene glycol)) was made and the formation of crosslinking has been discussed. Reaction of only glyoxal with wood showed little reactivity, while that of glyoxal/glycol gave high weight increases for each glycol. The appropriate condition was at 100° to 130°C for 2 hrs. It was found that the product forms network structures, at least within itself. The crosslinking between the product and wood components, however, could not be confirmed, although it was assumed that the product was structurally linked to wood by its reactive sites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193873
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Non-steady state water adsorption of wood (1994)
    Springer
    Wood science and technology 28 (1994), S. 450-456 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The validity of the following equation of water adsorption into wood substance which was derived in the previous report, is examined: d(δW)/dt = k0(1 − exp(-k1/t))δW(l − δW), which can approximately be written as: d(δW)/d(logt) = rδW(l − δW), where δW is moisture content; t is time (t 〉 0); k0, k1 and r are constants. After measuring dimensional change with change in time under various relative humidities, the change of moisture content was indirectly calculated from the proportional relationship between dimensional change and moisture content. It was found that the theoretical equation satisfactorily agreed with the experimental results. These results lead to the conclusion that the equation was valid. Furthermore, the properties of the equation, whose constants are determined from experimental results, is discussed. The rate of water adsorption of wood shows interesting and systematical properties, especially near relative humidities corresponding to the fiber-saturation point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225464
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  • 7
    Electronic Resource
    Electronic Resource
    Non-steady state water adsorption of wood (1994)
    Springer
    Wood science and technology 28 (1994), S. 359-363 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary A rate equation of non-steady state adsorption for wood is theoretically discussed, and an adsorption equation is solved. This will clarify the mechanism of the mechano-sorptive process. Non-steady state water adsorption of wood cannot be represented by an equation which is derived from Fick's law, because the equation by Fick's law is similar to that of Langmuir's adsorption theory. Therefore, the adsorption process in non-steady state was discussed, based on the assumption that water molecules create a new secondary internal surface as the water adsorption proceeds. That is, the process of water adsorption was regarded as an auto-catalyzed reaction. Additionally, the effect of the ultra-structure of wood was also considered. Consequently, a rate equation of adsorption and an adsorption equation could be theoretically obtained which satisfactorily represented the process of water adsorption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00195283
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of structural elements of the L2/HNK-1 carbohydrate epitope required for its function (1994)
    Springer
    Glycoconjugate journal 11 (1994), S. 345-352 
    Details
    ISSN: 1573-4986
    Keywords: L2/HNK-1 carbohydrate ; antibody recognition ; laminin binding ; neural migration and process outgrowth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The L2/HNK-1 carbohydrate epitope has been shown to carry an unusual 3′-sulfoglucuronic acid linkedO-glycosidically through a neolactosyl-type back bone to a ceramide residue. Using monoclonal antibodies, the same or a closely related epitope has also been detectedN-glycosidically linked to glycoproteins, amongst them several neural cell adhesion molecules. We used synthetic glycolipids carrying sulfated or non-sulfated glucuronic acid attached to ceramide through glycans of different length to show that not only the sulfated glucuronic acid but also the neolactosyl-type backbone is essential for the recognition of the L2/HNK-1 carbohydrate by a monoclonal antibody, its binding to laminin and its role in neural cell migration and outgrowth of processes from neurons and astrocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00731208
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