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  • 1
    Electronic Resource
    Electronic Resource
    Repression of nitrogenase by ethanol in nitrogen-deprived cultures of Rhodovulum sulfidophilum (1999)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 171 (1999), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Light-dependent H2 evolution did not occur in nitrogen-deprived cultures of Rhodovulum sulfidophilum in the presence of ethanol. When ethanol was added to cells which had been grown with ammonia, derepression of the nitrogen fixation genes (nifHD) was inhibited at an ethanol concentration of 1 mM. On the other hand, when cells had nitrogenase-catalyzed proton-reducing activity prior to ethanol addition, reduction of the nifHD transcript level did not occur after the addition. In cells grown with ammonia, concomitant addition of an auxiliary oxidant such as dimethylsulfoxide or sodium bicarbonate resulted in derepression of nitrogenase activity in the presence of ethanol. These results suggest that the electron-accepting process is necessary for derepression of nif genes in cultures which use ethanol as the electron donor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1999.tb13421.x
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  • 2
    Electronic Resource
    Electronic Resource
    Suppression of thermally induced reactions at SiO2/single-crystalline Al interfaces (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 559-561 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermally induced reactions at SiO2/Al interfaces are investigated by cross-sectional transmission electron microscopy. For the SiO2/Al interfaces fabricated by chemical vapor deposition of SiO2 on polycrystalline Al films, precipitates of reduced Si as the reaction products are observed in the Al films and along the SiO2/Al interfaces, after annealing at 500 °C for more than 2 h. On the other hand, the interfaces fabricated on the single-Al(111) films show no precipitation even after 4 h of annealing. The differences in the interfacial reactivities are discussed in relation to the existence of grain boundaries and Al film orientations. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.360866
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  • 3
    Electronic Resource
    Electronic Resource
    Direct observation of a thin reacted layer buried at Al/SiO2 interfaces (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 3554-3556 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An Al/SiO2 interfacial structure is investigated by cross-sectional transmission electron microscopy (TEM) and x-ray photoelectron spectroscopy (XPS) before and after post-metallization annealing. An interfacial reacted layer with uniform thickness of 2.5 nm is observed by TEM for samples annealed at 450 °C for 1 h. Further reaction is suppressed at higher annealing temperatures up to the eutectic point (577 °C) of an Al-Si system. XPS analysis of the interfacial structure is performed by removing the unreacted metallic Al layer selectively from the surface. The XPS spectra of the reaction products show that the interface has a layered structure of Al/Al2O3/Si/SiO2. This is discussed in relation to thermodynamic stability. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359536
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  • 4
    Electronic Resource
    Electronic Resource
    Ion heat pulse after a sawtooth crash in the JAERI Fusion Torus-2M tokamak (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 3696-3700 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The ion heat pulse after a sawtooth crash is studied by a time-of-flight (TOF) neutral measurement. A rapid change of the bulk ion energy distribution near the edge is observed after a sawtooth crash. The delay time is measured, and the effective measuring position is estimated by a neutral transport code. Then a transient ion thermal conductivity, χiHP, of about (7–18) m2/s is evaluated for the low confinement mode (L-mode) plasma. The simple diffusive model with constant χiHP, however, does not explain the amplitude of the pulse in the ion energy distribution. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872029
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  • 5
    Electronic Resource
    Electronic Resource
    New applications of nanocrystalline Fe(Co–Fe)–Hf–O magnetic films to micromagnetic devices : The 7th joint MMM-intermag conference on magnetism and magnetic materials (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6658-6660 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: New applications of high resistivity magnetic films, such as Fe–Hf–O and Co–Fe–Hf–O as thin film inductors and flux gate magnetic sensors, were investigated. These soft magnetic films with nanocrystalline structure and high resistivity were deposited on glass substrate by using the oxygen reactive sputtering method. Planar sandwich thin film inductors developed by using Fe–Hf–O or Co–Fe–Hf–O films had a higher quality factor than that of an amorphous Co–Ta–Hf film inductor. The dc–dc converter using the Fe(Co–Fe)–Hf–O film inductor had higher conversion efficiency. These high resistivity magnetic films were also applied to a flux gate magnetic sensor operated at high frequencies over 1 MHz. Both high frequency excitation and high permeability (owing to the low eddy current loss) enabled us to increase the sensitivity, e.g., 39 mV/Oe/turn at 5 MHz when using a 3 μm thick Fe–Hf–O film (12×6 mm2 area). © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367586
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  • 6
    Electronic Resource
    Electronic Resource
    Structural investigation of thermally nitrided amorphous Ti silicide (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 6476-6478 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermal nitridation of thin amorphous Ti-silicide films is studied. The use of hydrazine gas enables the nitridation at 500 °C, well below the nucleation temperature of Ti silicide. Transmission electron microscopy reveals that these TiSiN fims have amorphous structures, which are shown to be stable up to 750 °C. X-ray photoelectron spectroscopy indicates the simultaneous formation of Ti–N and Si–N bonds. This is consistent with the Ti–Si–N ternary phase diagram. Further, the presence of this nitrided film between Al and Si retards the interfacial reaction up to an annealing temperature of 550 °C near the eutectic point (577 °C) of an Al–Si system. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.364432
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  • 7
    Electronic Resource
    Electronic Resource
    Immunohistochemical identification of proteoglycan form of macrophage colony-stimulating factor on bone surface (1995)
    Springer
    Calcified tissue international 57 (1995), S. 213-217 
    Details
    ISSN: 1432-0827
    Keywords: Macrophage colony-stimulating factor ; Proteoglycan ; Antibody ; Bone surface
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract Several studies using op/op mice have shown that macrophage colony-stimulating factor (M-CSF) was necessary for osteoclast formation in vivo. Previously we reported that osteoblastic cells produced two molecular forms of M-CSF; one is an 85-kDa M-CSF, and the other is a proteoglycan form of M-CSF (PG-M-CSF) which has a binding affinity for bone-derived collagens and is extractable from human bone. In this study, we performed immunostaining of human bone using a newly established anti-PG-M-CSF antibody, and showed positive staining PG-M-CSF, probably produced by bone lining cells, on the bone surface. This observation suggests that the bone surface is suitable for osteoclast formation because of the presence of PG-M-CSF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310261
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  • 8
    Electronic Resource
    Electronic Resource
    Idiopathic spinal cord herniation (1996)
    Springer
    Neuroradiology 38 (1996), S. 155-156 
    Details
    ISSN: 1432-1920
    Keywords: Key words Spinal cord ; herniation ; Dura Mater ; duplication ; Magnetic resonance imaging ; Computed tomographic myelography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Idiopathic spinal cord herniation is a rare disease, few cases having been reported. We encountered a case of idiopathic spinal cord herniation presenting with severe spasticity in the right leg and urinary dysfunction. The spinal cord was herniated into a cavity created by duplication of the dura mater and resection of the inner layer improved the neurological deficits. MRI, myelography, and CT myelography were useful for diagnosing this disease. Four radiological signs of spinal cord herniation are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00604805
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  • 9
    Electronic Resource
    Electronic Resource
    Idiopathic spinal cord herniation (1996)
    Springer
    Neuroradiology 38 (1996), S. 155-156 
    Details
    ISSN: 1432-1920
    Keywords: Spinal cord, herniation ; Dura Mater, duplication ; Magnetic resonance imaging ; Computed tomographic myelography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Idiopathic spinal cord herniation is a rare disease, few cases having been reported. We encountered a case of idiopathic spinal cord herniation presenting with severe spasticity in the right leg and urinary dysfunction. The spinal cord was herniated into a cavity created by duplication of the dura mater and resection of the inner layer improved the neurological deficits. MRI, myelography, and CT myelography were useful for diagnosing this disease. Four radiological signs of spinal cord herniation are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00604805
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  • 10
    Electronic Resource
    Electronic Resource
    Methane emission from rice paddy fields in all of Japanese prefecture (1997)
    Springer
    Nutrient cycling in agroecosystems 49 (1997), S. 147-151 
    Details
    ISSN: 1573-0867
    Keywords: cultivation practices ; Japanese rice paddy fields ; methane flux ; soil type
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Field measurements of CH4 emission from rice paddy field during cultivation periods were performed at all of 47 Japanese prefectures under the project of ‘Research for evaluation of CH4 and N2O emissions from agricultural land, and improvement methods of soil, water and fertilizer management’ conducted by Agricultural Production Bureau, the Ministry of Agriculture, Forestry and Fisheries. Although this project was carried out at 159 fields, the data of 132 fields were used for this report because other 27 fields had not enough data to be suitable for the statistics analyses. The measurements at rice paddy fields in various locations in Japan showed that there were large temporal variations of CH4 flux and that the fluxes differed markedly with climate, characteristics of soil and paddy, application of organic matter and mineral fertilizer, and agricultural management practices. These data mainly indicated that CH4 emission from Gley soils was greater than those from other soil types such as Andosols, Upland soils, fine-textured Lowland soils, medium and coarse-textured Lowlands soils and gravelly Lowland soils, and that water and organic matter managements influenced CH4 emission. It is suggested that midsummer drainage treatment suppressed while the application of fresh organic matter such as rice straw and wheat straw enhanced CH4 emission, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009778517545
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