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  • 1
    Electronic Resource
    Electronic Resource
    Transport properties of microcrystalline silicon at low temperatures (1998)
    Springer
    Semiconductors 32 (1998), S. 807-811 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The dark conductivity and photoconductivity along with pulsed electron spin resonance have been measured over a wide temperature range with a high crystallinity hydrogenated microcrystalline silicon (μc-Si: H) sample. The transport mechanism in μc-Si: H is discussed on the basis of these measurements. Striking similarities in the temperature dependences of the dark conductivity and photoconductivity between μc-Si: H and some well-studied materials, such as hydrogenated amorphous silicon, suggest that at low temperatures hopping of carriers between localized states dominates the transport properties of μc-Si: H.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1187511
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  • 2
    Electronic Resource
    Electronic Resource
    The increase of thiobarbituric acid reacting substances in rats with experimental chronic hypoxia (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 312-313 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Feeding under conditions of reduced oxygen supply prompted an increase in serum, arterial and brain tissue levels of thiobarbituric acid (TBA)-reacting substances. These observations indicated the possibility that hypoxia might be one of the factors predisposing to the accumulation of lipid peroxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01949361
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  • 3
    Electronic Resource
    Electronic Resource
    Immunopetentiators and the protection they give against carbon tetrachloride hepatotoxicity (1982)
    Springer
    Cellular and molecular life sciences 38 (1982), S. 501-502 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Immunopotentiators such as BCG, levamisole, PS-K and OK-432 prevent carbon tetrachloride (CCl4) hepatotoxicity, and in spite of exposure to CCl4 the liver tissue levels of thiobarbituric acid (TBA) reactive substances were not increased in rats pretreated with such immunopotentiators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01952661
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  • 4
    Electronic Resource
    Electronic Resource
    Two-dimensional coherent detection imaging in multiple scattering media based on the directional resolution capability of the optical heterodyne method (1991)
    Springer
    Applied physics 52 (1991), S. 391-394 
    Details
    ISSN: 1432-0649
    Keywords: 42.60.Kg ; 87.60 Gp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper describes a new application of optical heterodyne detection using a laser beam for two-dimensional imaging of the internal structure of strongly scattering media in which the structure is completely obstructed from normal visual observation. The directional resolution capability for image formation due to the excellent antenna properties of the heterodyne technique is verified experimentally using a ground glass to cause strong scattering of the signal beam. Successful image detection of a test target placed in a highly scattering absorptive medium, with spatial resolution better than 400 μm in the case of our experiments, demonstrates that this Coherent Detection Imaging (CDI) method can overcome the diffuse nature of images in media such as those of biomedical interest and others to achieve scanning and tomographic imaging.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325156
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of affinity and aggregation on parallel diffusion of tri-sulfonated azo compounds into water-swollen cellulose membranes (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 1145-1151 
    Details
    ISSN: 1435-1536
    Keywords: Anionic dye ; aggregation ; affinity ; cellulose membrane ; parallel transport theory
    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 Adsorption and diffusion of tri-sulfonated azo dyes, C.I. Acid Red 18 and C.I. Acid Red 27 onto waterswollen cellulose membrane has been studied at 25°C. Affinities of these dyes onto cellulose were evaluated by the coefficients of Freundlich equation. Diffusion behavior of these days was analyzed on the basis of a parallel transport theory by surface and pore diffusion. The results could be described by the parallel diffusion model provided that adsorption was stimulated by addition of NaCl. The surface diffusivities for the parallel diffusion model were correlated by the affinity of the dyes, on the other hand, the pore diffusivities for the model were affected by aggregation of the dye depending on its structure and NaCl concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00655685
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  • 6
    Electronic Resource
    Electronic Resource
    A study on the causes of volume change of cement paste (1969)
    Springer
    Materials and structures 2 (1969), S. 23-34 
    Details
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Summary 1. The authors studied about drying shrinkage of hardened cement paste specimens, which were different in physical properties, by curing at various temperatures ranging from normal to high temperature. 2. Water vapour absorption test and drying shrinkage test were made on the specimens which were same in size, mixing proportion and curing conditions. 3. By research cancerning mechanism and some causes of the drying shrinkage of hardened cement paste, the authors were able to define the following relations. a) Drying shrinkage is proportional to the strength of capillary tension. b) Drying shrinkage is proportional to the amount of evaporable water held at equilibrium in unit volume of hardened cement paste. c) Drying shrinkage is inversely proportional to the dynamic Young's modulus. 4. The shrinkage of hardened cement paste due to the escape of interlayer water in its gelatinous material is probably caused by very low relative humidity.
    Notes: Résumé 1. Les auteurs ont étudié le retrait au séchage d'éprouvettes de pâte de ciment durcie, aux propriétés physiques différentes, par conservation à différentes températures, des températures normales jusqu'aux températures élevées. 2. Les essais d'absorption de vapeur d'eau et de retrait au séchage ont été faits sur des éprouvettes ayant les mêmes dimensions, le même dosage, et conservées dans les mêmes conditions. 3. Des recherches sur le mécanisme et quelques-unes des causes du retrait au séchage de la pâte de ciment durcie ont permis aux auteurs de définir les relations suivantes: a) le retrait au séchage est proportionnel à la valeur de la pression capillaire; b) le retrait au séchage est proportionnel à la quantité d'eau évaporable maintenue à l'équilibre dans le volume unitaire de la pâte de ciment durcie; c) le retrait au séchage est inversement proportionnel au module d'élasticité dynamique de Young. 4. Le retrait de la pâte de ciment durcie dû au départ de l'eau interstitielle à l'état de gel est probablement provoqué par de très faibles humidités relatives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02473652
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  • 7
    Electronic Resource
    Electronic Resource
    Anti methicillin-resistant Staphylococcus aureus (MRSA) activity by linolenic acid isolated from the marine microalga Chlorococcum HS-101 (1994)
    Springer
    Bulletin of environmental contamination and toxicology 52 (1994), S. 673-680 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00195486
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  • 8
    Electronic Resource
    Electronic Resource
    Genetic contribution of the BAT2 gene microsatellite polymorphism to the age-at-onset of insulin-dependent diabetes mellitus (1999)
    Springer
    Human genetics 〈Berlin〉 105 (1999), S. 197-199 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. The BAT2 gene lies within the class III region of the major histocompatibility complex. We investigated the frequency of the BAT2 microsatellite alleles (BAT2) in 74 young-onset insulin-dependent diabetes mellitus (IDDM) patients, 51 adult-onset IDDM patients, and 85 normal control subjects, and assessed the associations among these BAT2 alleles, TNFa microsatellite alleles (TNFa), and HLA-DRB1 alleles. The frequency of the BAT2.9 allele was significantly increased in the young-onset IDDM patients (12.8 vs 4.1%, Pc=0.04896), whereas the frequency of BAT2.12 allele was significantly decreased in young-onset IDDM patients (0.0 vs 11.8%, Pc=0.00002) compared with control subjects. The BAT2.9 allele was strongly associated with TNFa9 in the young-onset IDDM patients, although no association was found between the BAT2.9 and HLA-DRB1 alleles. The BAT2.12 allele was strongly associated with TNFa13, and with DRB1*1502 in control subjects. These results suggest that the BAT2 microsatellite polymorphism is associated with the age-at-onset of IDDM and possibly with the inflammatory process of pancreatic β-cell destruction during the development of IDDM. However, this association is not independent of TNFa polymorphisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004399900100
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  • 9
    Electronic Resource
    Electronic Resource
    Histochemical study on the maturation of human megakaryocytes using microfluorometry (1992)
    Springer
    Histochemistry and cell biology 97 (1992), S. 141-145 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A microcytofluorometrical DNA measurement was basically studied and was applied to single megakaryocytes previously identified on a Wright-Giemsa stained smear. The smear was first photographed and the location of each megakaryocyte was recorded on a cell map. The smear was then bleached with 50% acid ethanol and absolute methanol, and re-stained with 4′,6-diamidino-2-phenylindole (DAPI) reagent (pH 7.4) at 4° C. Nuclear blue fluorescence was observed and the intensity of this fluorescence was proportional to the amount of DNA with the coefficient of variation (CV) of 3.6% when stained for 30 min. After 30 min DAPI staining, the DNA measurement was microcytofluorometrically performed in single megakaryocytes which had been morphologically classified into 4 groups on the basis of cytoplasmic maturation, Bessis' classification, assessed on Wright-Giemsa-stained bone-marrow smears from normal human beings. The histograms of the cells did not show any difference in DNA ploidy distribution among the classes: that is, the DNA histograms disclosed ploidy distribution from 4 N to 64 N with the largest population of 16 N. These findings suggest that nuclear DNA synthesis is completed before platelet production starts. This method is useful for comparing the morphological features and DNA content of single megakaryocytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00267304
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  • 10
    Electronic Resource
    Electronic Resource
    A microcytofluorometric method for quantitative and qualitative evaluation of CFU-E and BFU-E colonies (1990)
    Springer
    Histochemistry and cell biology 94 (1990), S. 257-262 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new method has been developed for the precise identification of human bone marrow colony forming unit erythroid (CFU-E) and burst forming unit erythroid (BFU-E) colonies, and for determination of the hemoglobin contents using microcytofluorometry. The method relies on a photochemical reaction in which intracellular hemoglobin is converted into fluorescent porphyrin under violet light (λ=405 nm) in the presence of an SH-donor (mercaptoethylamine hydrochloride). The CFU-E and BFU-E colonies showed red fluorescence with two spectrum peaks at 600 and 650 nm when illuminated by violet light. These two peaks are consistent with those of porphyrin fluorescence. The porphyrin fluorescence was not inducible in colony forming unit granulocyte-macrophage (CFU-GM) colonies, while 20% of the CFU-GM colonies were false positive with respect to the conventional benzidine reaction. The photochemically inducible fluorescence began to appear in BFU-E colonies on the 4th day of culture, while the same colonies started to be positive for the benzidine reaction on the 9th day. Therefore, the photochemical reaction was more specific and sensitive than the benzidine reaction for the identification of CFU-E and BFU-E colonies. In addition, this method enabled us to measure the hemoglobin level in the cells forming the colonies because the intensity of the fluorescence was proportional to the amount of hemoglobin when the photochemical reaction was carried out for 50 min. As a result of qualitative and quantitative analysis of CFU-E colonies by this method, it was possible to detect the hemoglobin levels in the colonies from 1 of 4 cases of untreated acute nonlymphocytic leukemia and from 2 of 4 cases of myelodysplastic syndrome in which the hemoglobin levels were too low to be detected by the benzidine reaction. These cases, where the CFU-E colonies showed very low levels of hemoglobin, were associated with poor prognosis. Thus, our method is useful for identifying CFU-E colonies, determining their hemoglobin synthesis, and as a cue to predict the clinical course of the patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266625
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