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Heterogeneous silicon crystal growth on a single-crystal silicon wafer (1989)

Hide, I. ; Fujiya, E. ; Maeda, Y. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 66 (1989), S. 5851-5853

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Using a new process, a large grain polycrystalline silicon layer was grown directly from molten Si on a single-crystal silicon wafer at a rate 100 times faster than the conventional chemical vapor deposition process. A polycrystalline silicon layer was also produced on a single-crystal silicon wafer, which had an oxide layer and etched V grooves, through use of an additional ultrasonic wave effect in this process. A layer thickness of 100–600 μm and a grain size of 10 μm–3 mm were controllably obtained. After the growth of the polycrystalline layer, dislocation densities of 4×105 cm−2 for the single-crystal silicon substrate, and 2×106 cm−2 for the polycrystalline layer were obtained. Some devices were fabricated from the products of this new process, and the characteristics of these devices were investigated.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.343606

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Protein phosphorylation of neutrophils from normal children and patients with chronic granulomatous disease (1986)

Ishii, E. ; Irita, K. ; Fujita, I. ; [et al.]

Springer

European journal of pediatrics 145 (1986), S. 22-26

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ISSN: 1432-1076

Keywords: Protein phosphorylation ; Neutrophil ; Chronic granulomatous disease

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract The phosphorylation and dephosphorylation of proteins in neutrophils from normal children and patients with chronic granulomatous disease (CGD) were studied with two-dimensional gel electrophoresis and autoradiography, followed by densitometric scanning. In normal neutrophils the radio-activities of 11 spots among approximately 50 radioactive spots were changed by stimulation with phorbol 12-myristate 13-acetate (PMA) and 6 of the 11 spots were also changed by stimulation with N-formyl-methionyl-leucyl-phenylalanine (FMLP) and NaF. The phosphorylation of only two spots (Mr=48000 and 62000) was inhibited by 2-deoxyglucose and N-(6-aminohexyl)-5-chloro-1-naphthalene sulphonamide (W-7), which inhibits superoxide production, while it was not affected by dibutyryl cAMP, KCN and ethyleneglycol-bis-(β-aminoethylether)-N,N′-tetraacetic acid (EGTA), which do not affect superoxide production. The observation indicates that the Mr=48000 and 62000 proteins may be involved in the activation process of superoxide production. When the neutrophils of four male and two female CGD patients were examined, the changes in 11 spots on stimulation were similar to those of normal children, indicating that the (de)phosphorylation of the proteins which seems to be involved in the activation process is not affected in CGD neutrophils.