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  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure of poly(p-phenylene) prepared by organometallic technique (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 30 (1992), S. 293-297 
    Details
    ISSN: 0887-6266
    Keywords: poly(p-phenylene) from organometallic polymerization, crystal structure of ; crystal structure of poly(p-phenylene) from organometallic preparation ; X-ray diffraction of organometallically produced poly(p-phenylene) ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The two-dimensional crystal structure of poly(p-phenylene) is investigated by linkedatom Rietveld analysis of the x-ray diffraction powder profile. Two molecular chains are packed in a rectangular pgg unit cell (a = 0.779 nm; b = 0.551 nm) with a paracrystalline shift distortion along the chain axis. The molecular conformation is not rigidly planar; rotations between adjacent phenyl-ring planes in a molecule alternate with an angle of about 20°. The setting angle between the mean molecular plane and the a axis is 55.5°.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1992.090300309
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  • 2
    Electronic Resource
    Electronic Resource
    Imaging Bragg spectrometer for pinched plasma experiments (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 3761-3765 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A compact Bragg spectrometer for monochromatic imaging in the soft x-ray region was designed and examined. With this spectrometer, a pinhole image is simultaneously recorded with a monochromatic image. This makes it possible to easily identify the wavelength when the location of the soft x-ray source fluctuates from shot to shot, such as in the plasma focus and Z-pinch plasma. An rubidium acid phtalate (RAP) flat crystal was examined and monochromatic images of the argon K lines around 4 A(ring) were successfully obtained and displayed. The resolution power and dispersion obtained in situ were compared with the calculated values. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144503
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  • 3
    Electronic Resource
    Electronic Resource
    Morphology and size distribution of oxide precipitates in as-grown Czochralski silicon crystals (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 65 (1994), S. 1686-1688 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The morphology and size distribution of oxide precipitates in as-grown Czochralski (CZ) silicon crystals, with growth rates of about 1.1 mm/min, have been studied using infrared light scattering tomography (LST). The following results were obtained. (1) The morphology of oxide precipitates in as-grown CZ silicon is polyhedral. (2) The length of the side of the polyhedral precipitates is about 80 nm. According to their morphology and size distribution, it was concluded that they were formed in the high temperature range (≥1000 °C) during crystal growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.112886
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  • 4
    Electronic Resource
    Electronic Resource
    Dual wavelength optical bistability and multistability in a symmetric self-electro-optic effect device based on Wannier–Stark localization (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 1679-1681 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A tunable optical switch has been studied of a symmetric self-electro-optic effect device based on Wannier–Stark localization (WSL) in GaAs/AlAs superlattices. This device is driven by two different wavelengths for a signal beam and a control beam. Clear bistability and/or triple stability are demonstrated by controlling the illumination wavelengths. The tunability of the switching properties is clearly explained by the WSL mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107235
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of ordering on the operation of AlGaInP lasers grown by metalorganic chemical vapor deposition (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1959-1961 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have observed large differences in the lasing wavelength and threshold current for [11¯0]- and [110]-striped AlGaInP lasers that are fabricated from a single wafer grown by metalorganic chemical vapor deposition. With the laser stripe aligned parallel to the [110] direction, the lasing wavelength is about 6 nm shorter than that with the [11¯0] stripe. The threshold current (Ith) of the [110]-striped laser is 10 mA higher than that of the [11¯0]-striped laser. The differences are found to be well explained by the splitting of the valence band due to the (111) ordering in the AlGaInP lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108376
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  • 6
    Electronic Resource
    Electronic Resource
    Atopic asthma caused by Candida albicans acid protease: case reports (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 49 (1994), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Two cases of atopic asthma caused by acid protease produced by Candida albicans are reported. Both patients had high levels of serum IgE antibodies against the acid protease and showed positive conjunctival and immediate bronchial responses when challenged with the protease. Significant histamine release was detected in both patients when their peripheral leukocytes were challenged with the protease antigen. These findings clearly showed that C. albicans acid protease is the causative allergen of atopic asthma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1994.tb02102.x
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  • 7
    Electronic Resource
    Electronic Resource
    Human Granulocyte-Macrophage Colony-Stimulating Factor Lowers the Levels of Plasma Cholesterol with an Increase in mRNA for Very Low Density Lipoprotein Receptor in Rabbits (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 748 (1994), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1994.tb17377.x
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  • 8
    Electronic Resource
    Electronic Resource
    Closure of the micropyle during embryonic development of some pelagic fish eggs (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 40 (1992), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The fine structure of the egg envelope and micropyle was studied in unfertilized and developing eggs of the flounder Paralichthys olivaceus (Temminck & Schlegel), the Alaska pollack Theragra chalcogramma (Pallas), the Japanese tilefish Branchiostegus japonicus (Houttuyn) and the porgy Pagrus major (Temminck & Schlegel). The outer envelope surface of the unfertilized egg was wrinkled, while the inner surface was folded. The micropyle of the unfertilized egg consisted of a shallow vestibule and a distinct canal. The micropylar region of the inner surface of the envelope had a conical- or bowl-shaped protrusion. In developing eggs, the thickness of the envelope decreased and showed smooth outer and inner surfaces which indicated that it had been stretched tangentially at the time of the perivitelline space formation. The lumen of the micropylar canal was invariably occupied with envelope material. We postulate that the blockage of the micropylar canal is a result of the stretching of the envelope. The closure of the micropyle inhibits sperm and external pathogens from penetrating into the perivitelline space and seems to be involved in both the permanent prevention of polyspermy and the protection of the developing embryo from bacterial infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1992.tb02569.x
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  • 9
    Electronic Resource
    Electronic Resource
    Prevalence and pathogenicity of infectious pancreatic necrosis virus (IPNV) associated with feral lake trout, Salvelinus namaycush (Walbaum) (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 17 (1994), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. A study was undertaken in 1987 to determine the prevalence of infectious panercatic necrosis virus (1PNV) infection in the lake trout population of Cornwall Lake. Alberta, Canada, and its pathogenicity to cultivable salmonid fish. Virological examination indicated that 44.4% of the adult lake trout in the lake, which is situated in a remote northern region of Alberta, were infected with the virus, mainly in the pyloric caeca and intestine. Virus was not detected in kidney, leucocytes, liver or gonads. In experimental immersion infection of brook trout fry, the virus caused a cumulative mortality of up to 74% in 30 days, beginning at 10 days post-infection. Pyloric caeca, intestine and to some extent gills were found to be early sites of viral replication. The virus was less pathogenic to rainbow trout causing a cumulative mortality of 10% and the survivors were IPNV carriers for at least 3 months. The virus did not cause mortality in young lake trout, the natural host, but the infected fish carried the virus during the experimental period of 30 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1994.tb00242.x
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  • 10
    Electronic Resource
    Electronic Resource
    Growth and/or acid production of Candida albicans on soft lining materials in vitro (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 21 (1994), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Effects of soft lining materials on the growth and/or acid production of Candida albicans were investigated using a simplified method monitoring the pH change in the growth medium. Reverse sigmoidal pH curves were observed with all samples and, as compared with acrylic, all soft lining materials inhibited fungal growth or acid production in the following way, i.e. delay of the beginning of a rapid and linear decline in pH, decreases in the rate of linear change in pH and increases in minimum pH.Further examinations using a surface-modified glass tube revealed that the order of Candida growth agreed with the relative hydrophobicity and adherence capacity of substrates, suggesting that this adherence capacity affected the yeast growth on their surfaces.Besides adherence capacities of substrates, the powder, liquid and plasticizer of some soft lining materials directly inhibited Candida growth. Thus, the results obtained here revealed that several factors within soft lining materials affected Candida growth and/or acid production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1994.tb01173.x
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