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  • 1990-1994  (9)
  • 1970-1974
  • 1993  (4)
  • 1992  (3)
  • 1990  (2)
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  • 1990-1994  (9)
  • 1970-1974
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  • 1
    Electronic Resource
    Electronic Resource
    Dependence of window effects on Al content of a window layer in high-power AlGaAs window structure lasers with window grown on facets (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 809-812 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In high-power AlGaAs window structure lasers with a window grown on facets (WGF) structure, dependence of window effects on Al content of the window layer is examined. When the Al content of the window layer is more than that of the cladding layer, the window effects are found. But, in other cases, the window effects do not occur. A calculation of a carrier leakage from the active layer to the window layer is performed. From the result, we deduce that the reduction of the window effects is caused by the carrier leakage. In the WGF laser with the confirmed window effects, a maximum output power of 350 mW is achieved and highly reliable operation under 100 mW at 50 °C beyond 10000 h is attained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354870
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  • 2
    Electronic Resource
    Electronic Resource
    One-step-metalorganic-vapor-phase-epitaxy-grown AlGaInP visible laser using simultaneous impurity doping (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 1736-1738 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We fabricated a GaInP/AlGaInP visible laser with a real-index guide structure by one-step metalorganic vapor phase epitaxy using simultaneous impurity doping. We achieved an effective self-aligned current-confinement structure in the AlGaInP cladding layer and a threshold current of only 18 mA. The laser had stable transverse-mode oscillation with a beam astigmatism less than 1 μm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110699
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  • 3
    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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  • 4
    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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  • 5
    Electronic Resource
    Electronic Resource
    Carbonic anhydrase II deficiency in three unrelated Japanese patients (1993)
    Springer
    Journal of inherited metabolic disease 16 (1993), S. 982-990 
    Details
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Three Japanese patients with carbonic anhydrase II (CAII) deficiency from three families were described. The parents of one patient were unrelated, the parents of each of the other two patients were first cousins. All the patients had renal tubular acidosis, osteopetrosis, symmetrical cerebral calcification and mental retardation. They exhibited poor activity and poor appetite in the neonatal period, and then developed psychomotor retardation. Two of them were diagnosed as having osteopetrosis at 10 months and 36 years of age, respectively, and the other as having osteomalacia at 28 years of age. All patients had recurrent episodes of muscle weakness. The CAII enzyme activity and protein levels in red blood cells in each of the three patients were deficient. Their parents exhibited approximately 50% normal levels of CAII activity and protein. This is the first report of patients with CAII deficiency in the Japanese population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00711514
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  • 6
    Electronic Resource
    Electronic Resource
    Polarized electron capture by3He2+ at 20–28 keV (1993)
    Springer
    Hyperfine interactions 78 (1993), S. 251-257 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nuclear polarization was measured by means of beam foil spectroscopy for a3He+ ion produced by an electron capture process of a3He2+ from a polarized sodium atom in an incident energy range from 20 to 28 keV. Assuming that a polarized electron of a sodium atom is predominantly captured to the 3d orbital of a3He+ ion andcascades down to the 1s ground state via the 2p orbital, an alignment factorA 0 col (L=2) for the 3d orbital of a3He+ ion was extracted by comparing the observed initial sodium polarization andfinal nuclear polarization. The observedA 0 col (L=2) showed a less pronounced energy dependence andwere qualitatively reproduced by the theoretical calculation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568147
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  • 7
    Electronic Resource
    Electronic Resource
    The influence of the normal turbinate mucosa on nasal airflow (1990)
    Springer
    European archives of oto-rhino-laryngology and head & neck 247 (1990), S. 174-175 
    Details
    ISSN: 1434-4726
    Keywords: Nasal resistance ; Turbinate mucosa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In an attempt to determine the influence of the turbinate mucosa on nasal airflow resistance, we measured the nasal resistances in seven patients who had no lateral walls on one side of their nasal cavities because of unilateral operative removal of maxillary tumors. We compared resistances on the operated side with the normal unoperated side. No significant differences were found either on inspiration or expiration. Additionally, no significant influence of the turbinate mucosa on nasal airflow resistance was detected in sitting subjects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00175972
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  • 8
    Electronic Resource
    Electronic Resource
    Polarized heavy ion source based on spin and charge exchange collisions and laser optical pumping (1992)
    Springer
    Hyperfine interactions 74 (1992), S. 205-215 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A polarized heavy ion source based on spin and charge exchange collisions and laser optical pumping succeeded in producing a nuclear polarized3He+ beam. A brief description is given on a prerequisite as a practical heavy ion source and on an external injection system by which the polarized3He beam will be injected into the RCNP isochronous cyclotron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398630
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  • 9
    Electronic Resource
    Electronic Resource
    α-Elastin coacervate as a protein liquid membrane: Effect of pH on transmembrane potential responses (1992)
    New York : Wiley-Blackwell
    Biopolymers 32 (1992), S. 1173-1180 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A protein liquid membrane composed of coacervated α-elastin, a chemical fragmentation product of the biological elastic fiber protein, functioned as an amphoteric liquid ion-exchange membrane. Ionic permselectivities of the α-elastin coacervate membrane to a series of metal chlorides were investigated for the concentration-cell systems by the ordinary electrochemical measurements. Effects of pH on the transmembrane potential responses for NaCl, CaCl2, and MgCl2 systems were examined. Only in the Ca2+ -containing system did potential responses stay at constant levels against the pH changes, whereas in the other systems, increasing pH caused potential changes, indicating a improvement of cationic permselectivity across the α-elastin coacervate membrane. It was suggested that the characteristic Ca2+ transport mechanisms across the α-elastin coacervate membrane are related in some way to the polypeptide backbone interactions specific and selective to Ca2+ ions. © 1992 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360320906
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