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  • 11
    Electronic Resource
    Electronic Resource
    Growth temperature dependence of intrinsic and extrinsic acceptor concentration in (Ga,Al)Sb evaluated by C-V characteristics of metal-insulator-semiconductor structures (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 1261-1265 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Growth temperature (TG) dependence of the acceptor concentrations (NA) in Al0.1Ga0.9Sb grown by liquid phase epitaxy in a very wide growth temperature range (250–500 °C) was investigated. It was found that NA varies with TG down to 350 °C as NA ∝exp(Ea/kBTG) with Ea=0.47 eV and that below 350 °C NA fluctuates depending highly on growth conditions. Acceptors in Al0.1Ga0.9Sb grown above 350 °C were concluded to be intrinsic. These observations were successfully made using the improved extremely low-temperature growth process. The evaluation technique of measuring the impurity concentration in a thin epitaxial layer on the conductive GaSb substrate by C-V characteristics of metal-insulator-semiconductor structures was employed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335456
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  • 12
    Electronic Resource
    Electronic Resource
    Distribution of As atoms in InP/InPAs (1 monolayer)/InP heterostructures measured by x-ray crystal truncation rod scattering (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 81 (1997), S. 112-115 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The interfaces of InP/InPAs(1 monolayer)/InP samples grown by organometallic vapor-phase epitaxy were investigated by the x-ray crystal truncation rod scattering measurement. The distribution of As atoms around the InPAs heterolayer was clearly revealed in the atomic scale from the measurement. It was shown that the distribution of As atoms into the layer under the InPAs layer was very small and that distribution of As atoms in the InP cap layer was, on the other hand, noticeable and the amount of As atoms was almost the same as that contained in the InPAs heterolayer. These results suggest that the extension of As atoms in the InP layer occurs due to the absorbed As atoms on the InPAs surface or As atoms remaining in the gas phase. Thus, to realize the abrupt InP/InPAs interface, the source-gas change sequence should be controlled to be very abrupt. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363995
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  • 13
    Electronic Resource
    Electronic Resource
    Observations of a Buneman double layer and associated electron heating in a high-voltage straight plasma discharge (1991)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 3 (1991), S. 288-299 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spatial evolution of a potential hump (electron hole) into a Buneman double layer was for the first time observed at the instant of current limitation in the initial phase of a high-voltage straight plasma discharge with a preexisting hydrogen plasma. Potential profiles along the axis numerically calculated from the real time E-field data demonstrate the formation of a strong double layer with an inverse potential jump (eφDL/kTe∼103) moving toward the center of the device with a mean velocity 1.2×108 cm/sec, nearly 0.3 times the electron thermal velocity. The strong HV double layer developed near the center then quickly grew up to an extremely strong dynamic double layer propagating toward the anode. The formation of a highly anisotropic velocity distribution of energetic electrons associated with the strong double layer was evidenced by intense hard x-ray emissions that were first detected in the direction almost parallel to the magnetic field with a delay time 250–350 nsec from the generation of the double layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859737
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  • 14
    Electronic Resource
    Electronic Resource
    Duct-like structures in odontogenic epithelium of compound odontoma (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 20 (1991), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: During a histologic investigation of compound odontomas, numerous duct-like structures scattered in odontogenic epithelia were found in 3 of 7 cases. The duct-like lumina were 10 to 150 μm in diameter, and lined with eosinophilic, and relatively regular-arranged epithelial cells which were cuboidal or flat in shape and which had a hyperchromatic nucleus, resulting in some resemblance to the small duct of excretory glands. Amorphous material stained palely with hematoxylin was present within the duct-like lumina, but showed somewhat weaker reaction to mucous stainings. Mucous secreting cells could not be found in any odontogenic epithelia. Although no firm conclusion of histogenesis and pathologic significance of the duct-like structure in odontogenic epithelium, the result of the present examination suggests that the odontogenic epithelial cells may have an ability to form duct-like structure under the unknown condition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1991.tb00918.x
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  • 15
    Electronic Resource
    Electronic Resource
    Histopathologic study of epithelial components in the connective tissue wall of unilocular type of calcifying odontogenic cyst (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 19 (1990), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Histopathologic study of satellite cysts and odontogenic epithelial islands in connective tissue wall of unilocular type of calcifying odontogenic cyst (COC) was made. The material was 13 cases consisting of 3 simple unicystic COCs, 9 odontome producing COCs and 1 ameloblastomatous proliferating COC. Satellite cysts were found in 6 cases, and were histologically classified into following types: simple cystic, odontome producing and ameloblastomatous. Histologic types of satellite cysts did not coincide with those of main cystic lesions in some cases. Odontogenic epithelial islands with or without proliferating feature were found in 9 cases, and were found in all cases with satellite cysts. Melanin and melanocytes were seen in an ameloblastomatous satellite cysts of 1 of 3 pigmented COCs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1990.tb00807.x
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  • 16
    Electronic Resource
    Electronic Resource
    Enlargement of rat submandibular salivary gland induced by single amputation of lower incisor teeth (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 15 (1986), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Histological, histometric and ultrastructural studies of rat submandibular salivary glands (SMG) following single amputation of lower incisor teeth were made. The SMG enlargement occurred after the tooth amputation, and its maximal increase of weight was reached 7 days later. The results of histological and histometric observations showed that the enlargement of SMG was due to both hypertrophy and hyperplasia of the acinar cells, and hypertrophic acinar cells were ultrastructurally characterized by well-developed organelles such as rough-surfaced endoplasmic reticulum and Golgi apparatus which filled the entire cytoplasm. Hydropically swollen nerve endings with disappearance of vesicles were frequently found. In later stages, degenerative or necrotic cells were scattered in the acini, and the size and the structure of the remaining acinar cells became gradually similar to those of non-treated glands. The morphological changes seen in the enlarged SMG induced by single amputation of the lower incisor teeth in rat were similar in many ways to those of sialadenosis induced experimentally by active sympathomimetic drugs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1986.tb00634.x
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  • 17
    Electronic Resource
    Electronic Resource
    Crystalloids with calcareous deposition in the parotid gland: one of the possible causes of development of salivary calculi (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 15 (1986), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aggregated crystalloids and calculi, up to 600 to 700 μm in diameter, found in the parotid gland tissue taken from a patient with chronic recurrent parotitis were examined histopathologically and microanalytically. In part of the periphery of calculi which had lamellaled structure, layers of crystalloids in continuation with calculi were observed; and diffuse deposition of von Kossa-positive fine granules was seen in the innermost area of the crystalloid-layers. By electron probe x-ray microanalysis, phosphorus, sulphur and calcium were principally detected within the innermost area of the crystalloid-layers. The result of the present study lends support to the possibility that crystalloids have some relation to the development of salivary calculi in the human parotid gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1986.tb00658.x
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  • 18
    Electronic Resource
    Electronic Resource
    Focal lymphocytic infiltration in the human labial salivary glands: a postmortem study (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 15 (1986), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Focal lymphocytic infiltration in the human labial salivary glands was examined in a series of 190 postmortem subjects after suitable exclusion had been made. Focal lymphocytic infiltration, with or without a slight degree of parenchymal atrophic change, was found in 22.4% of the males and in 35.7% of the females. Of these, 9.0% (12 subjects) of the males and 10.7% (6 subjects) of the females with focal lymphocytic infiltration did not show any atrophic changes of the parenchyma. In the series reported here, the prevalence of focal lymphocytic infiltration apparently differs from the results of earlier investigators who had reported that none of the postmortem subjects without autoimmune diseases or connective tissue diseases showed focal lymphocytic infiltration in minor salivary glands. Although the pathological significance of focal lymphocytic infiltration in the minor salivary glands remains obscure, its diagnostic value for Sjögren's syndrome is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1986.tb00582.x
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  • 19
    Electronic Resource
    Electronic Resource
    Crystalloid granuloma of the parotid gland: a previously undescribed salivary gland lesion (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 20 (1991), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This paper reports a case of epithelioid cell granuloma containing numerous crystalloids, found in the parotid region of a 63-yr-old man. Histopathologic, histochemical and scanning electron microscopic findings of these crystalloids scattered throughout the lesion were similar to those of previously studied crystalloids in salivary duct cysts. Further, a foreign body reaction to crystalloids was frequently found, such a finding suggests the lesion as a manifestation of a granulomatous reaction to crystalloids formed in the parotid gland, and was diagnosed as crystalloid granuloma of the parotid gland.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1991.tb00425.x
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  • 20
    Electronic Resource
    Electronic Resource
    Localized oral amyloidosis: ultrastructural and immunohistochemical study (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral pathology & medicine 16 (1987), S. 0 
    Details
    ISSN: 1600-0714
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An histopathological, ultrastructural and immunohistochemical study of localized amyloidosis in the floor of mouth of a 58-year-old male in good health is reported. The lesion was composed of nodular deposits of amyloid surrounded by libroblastic or histiocytic cells, and metaplastic ossification was seen in some deposits. Ultrastructural findings disclosed typical amyloid fibrils with felt-like structure. Closely connected with the amyloid deposits were cells with active histiocytic or fibroblastic appearance. Their cytoplasm contained amyloid fibrils. At the outermost area of the amyloid deposits, bundles of amyloid fibrils projected from these cells into amyloid deposits. Amyloid protein of the present case did not react to any antisera using anti-AA, anti-A lambda, anti-A kappa and anti-prealbumin antisera. It can be assumed that histiocytes or fibroblasts play an important role in local amyloid formation, however, the nature of amyloid fibril protein in the present case is unknown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-0714.1987.tb01493.x
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