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  • 1
    Electronic Resource
    Electronic Resource
    InGaAs/InAlAs bistable multiple quantum well lasers with large on/off ratio using the resonant tunneling effect (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1462-1464 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Bistable operation with a large on/off ratio of 800:1 is achieved in InGaAs/InAlAs multiple quantum well (MQW) lasers using the resonant tunneling effect at 77 K. Structural dependence of resonant tunneling characteristic in the MQW structures reveals that the threshold current density, at which negative differential resistance appears, increases drastically when the InAlAs barrier width of MQW structures decreases. The increase in the threshold current density has led to an improvement in the bistable characteristics of InGaAs/InAlAs MQW lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99967
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  • 2
    Electronic Resource
    Electronic Resource
    Electric field effects in excitonic absorption for high-quality InGaAs/InAlAs multiple-quantum-well structures (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 2795-2797 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electric field effects in excitonic absorption characteristics are studied for high-quality InGaAs/InAlAs multiple-quantum-well structures grown by molecular beam epitaxy. The minute comparison between the experimental and theoretical results verifies the following: first, the variations of exciton levels in the first subband show excellent agreement with the calculations; second, the exciton level in the second subband shows a shift to the higher energy (blue shift).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341582
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of deep levels on the optoelectronic properties of InGaAs/InAlAs multiquantum-well structures (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1955-1960 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Deep electron-trapping centers present in InAlAs (barrier layers) are found to have significant effects on the optoelectronic properties of InGaAs/InAlAs multiquantum-well structures grown by molecular-beam epitaxy. When the energy depths of these centers are less than the discontinuity of the conduction band for this heterojunction, they come to be ionized to produce two-dimensional electron gas in the quantum well (InGaAs). The excess electrons thus accumulated dissociate the excitons by screening the attractive potential between electrons and holes. Hence, the deep levels in barrier layers must be reduced in order to improve the optoelectronic quality of this class of multiquantum-well structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341093
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  • 4
    Electronic Resource
    Electronic Resource
    Development and quality measurements of cold relativistic electron beam for low-γ free-electron lasers (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 2789-2793 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A relativistic electron beam source with low temperature (cold) using a field emission cathode and uniform electrostatic acceleration has been developed for use in low-γ free-electron lasers. An energy of 0.51 MeV and a current of 60 A (200 A/cm2) were obtained. The energy spread and the angular velocity spread were measured to be ΔE/E=0.14% and β⊥/β(parallel) =4×10−2, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344205
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  • 5
    Electronic Resource
    Electronic Resource
    π*–σ* hyperconjugation mechanism on the rotational barrier of the methyl group (III): Methyl-azabenzenes in the ground, excited, and anionic states (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 114 (2001), S. 8357-8363 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We theoretically investigate the internal rotations of the methyl group in methyl-azabenzenes, such as o- and m-methylpyridines, 2-methylpyrazine, 4-methylpyrimidine, 4-methylpyridadine, and 4-methyl-1,2,3-triazine in the ground, excited, and anionic states. The calculated rotational barriers reproduce well the experimental data. Orbital pictures are given for the barrier changes by excitation and electron attachment. An idea of π*–σ* hyperconjugation is applied for a comprehensive interpretation of the barrier changes. A correlation is found between the rotational barriers and the splitting of the lowest and next-lowest unoccupied molecular orbitals. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1364677
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  • 6
    Electronic Resource
    Electronic Resource
    Isolation and Identification of Bitter Peptides of Tryptic Hydrolysate of Soybean 11S Glycinin by Reverse-phase High-performance Liquid Chromatography (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The 21 peptides purified from the bitter fraction of tryptic hydrolysates of soybean 11S glycinin by using gel-permeation high-performance liquid chromatography (HPLC) and a series of 3 C18 reverse phase (RP)-HPLC were in the molecular weight range of 200-1400 Da and showed mostly the hydrophobicity of less than 1400 cal/mol. Although the primary structures of the bitter peptides from 11S glycinin were not exactly the same as those of the proglycinin, many bitter peptides were basic mimics of the common structure, indicating the significance of the primary structure of a peptide playing a role in the bitter taste perception.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2003.tb07039.x
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of texture of food on chewing patterns in the human subject (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of oral rehabilitation 16 (1989), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To elucidate the effects of food character on chewing patterns in humans, the electromyographic activity (EMG) of the chewing muscles and also the jaw movements were recorded in twenty-nine young subjects during ordinary chewing of five different foods.The results obtained were as follows. (a) The harder food materials showed a higher amplitude of the masseter EMG than the softer ones. (b) Concerning the number of chewing strokes and the elapse of time until the last swallowing action, subjects could be divided into two groups. (i) In the first major group, the number of chewing strokes and chewing time until the last swallowing action increased following increase of hardness of the food. This suggests that chewing force and chewing movements may be strongly influenced by the texture of food, especially its hardness. Further, the degree of pulverization of eating materials appears to be the major factor in controlling the swallowing action. (ii) In the second minor group, the chewing strokes and the chewing time were less influenced by the hardness of food. Here, a certain number of chewing strokes could be stimulating the swallowing centre in the brain and so induce swallowing, regardless of the degree of pulverization of the food.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.1989.tb01331.x
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  • 8
    Electronic Resource
    Electronic Resource
    Translucency of glass-fibre-reinforced composite materials (2004)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 31 (2004), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  The purpose of this study was to examine the translucency of glass-fibre-reinforced composite framework materials. Vectris and FibreKor, as well as an experimental material, were the glass-fibre-reinforced framework materials used. Targis, Sculpture and Estenia were the types of particulate filler composites veneered onto frameworks. Specimens were fabricated from each material, 0·5 and 1·0 mm thick. In addition, laminate specimens, 1·5 mm thick, were fabricated. The translucency of each specimen was evaluated by determining its contrast ratio. The laminate specimens were examined for colour differences. The experimental framework material was more translucent than the enamel composite when it was not coloured, and was nearly as translucent as the dentine composite when coloured. The commercial tooth-coloured framework materials were nearly as translucent as the dentine composite. It was found that it was possible to reproduce the same colour as the veneering dentine composite, when the framework thickness was 0·5 mm, except in the case of FibreKor. Within the limitations of this study, tooth-coloured, glass-fibre-reinforced framework materials are nearly as translucent as the veneering dentine composite, but these materials affect the colour of the prosthesis if the thickness of the framework material is increased beyond a certain point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2004.01296.x
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  • 9
    Electronic Resource
    Electronic Resource
    Cetraxate, a mucosal protective agent, combined with omeprazole, amoxycillin, and clarithromycin increases the eradication rate of Helicobacter pylori in smokers (2000)
    Oxford UK : Blackwell Science Ltd
    Alimentary pharmacology & therapeutics 14 (2000), S. 0 
    Details
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Our previous study demonstrated that Helicobacter pylori eradication was less effective in smokers than in non-smokers. Cetraxate is an anti-ulcer drug that increases gastric mucosal blood flow.〈section xml:id="abs1-2"〉〈title type="main"〉Aim:To evaluate the effect of cetraxate combined with new triple therapy for the eradication of H. pylori in smokers.〈section xml:id="abs1-3"〉〈title type="main"〉Methods:This study had a single-centre, double-blind, randomized non-placebo design. A total of 106 consecutive H. pylori-positive smoking patients were randomly allocated to one of two regimens: one group received omeprazole (20 mg), amoxycillin (1500 mg), and clarithromycin (600 mg) for 7 days (OAC, n=55). The other group recieved OAC plus cetraxate (600 mg) for 7 days (OAC + CET, n=51). The success of H. pylori eradication was evaluated by histology and the 13C-urea breath test at 4 weeks after completion of treatment.〈section xml:id="abs1-4"〉〈title type="main"〉Results:By intention-to-treat analysis, the H. pylori eradication rate was 55% in the OAC group and 92% in the OAC + CET group (P 〈 0.01). By per protocol analysis, the H. pylori eradication rate was 58% in the OAC group and 94% in the OAC + CET group (P 〈 0.01).〈section xml:id="abs1-5"〉〈title type="main"〉Conclusion:Cetraxate combined with new triple therapy increases the eradication of H. pylori in smokers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2036.2000.00807.x
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  • 10
    Electronic Resource
    Electronic Resource
    Cutaneous focal mucinosis (1989)
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 121 (1989), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A 39-year-old man had typical cutaneous focal mucinosis on the left forearm. The fibroblasts in the myxomatous lesion had many cytoplasmic vesicles, and on electron microscopy, these were compatible with condensing vacuoles or secretory granules. The fibroblasts in this case were considered to be mucoblasts involved in the over-production of the ground substance, that was mainly composed of hyaluronic acid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.1989.tb15521.x
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