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  • Articles  (91)
  • 1985-1989  (88)
  • 1945-1949  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Stepped-gate-oxide structure—A new approach for speed enhancement in the gate-controlled photodetector (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 1335-1337 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this letter, we report a stepped-gate-oxide structure implemented in the gate-controlled photodetector. The experimental results show that a one-order-of-magnitude enhancement in the response speed can be achieved by the use of such a structure owing to the induced transverse electrical field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100708
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  • 2
    Electronic Resource
    Electronic Resource
    Observation of capacitive modulation of bipolar current in crystalline silicon gated p-i-n structures (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 1875-1877 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report, for the first time, the experimental observation of capacitive modulation of bipolar current in crystalline silicon devices consisting of a lateral p-i-n channel and an insulated polycrystalline silicon gate. Modulation characteristics of devices with different channel lengths are compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101265
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  • 3
    Electronic Resource
    Electronic Resource
    Tracer diffusion in dense methanol and 2-propanol up to supercritical region: understanding of solvent molecular association and development of an empirical correlation (1987)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 26 (1987), S. 815-819 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00064a033
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  • 4
    Electronic Resource
    Electronic Resource
    Hard sphere treatment of binary diffusion in liquid at high dilution up to the critical temperature (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 2052-2055 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Binary diffusion coefficients at high dilution are measured for ethane and ethylene dissolved in cyclohexane at temperatures from 280.5 to 363.2 K and for benzene in cyclohexane and n-hexane up to their critical temperatures. With the effective hard-sphere diameters backed out from self-diffusion data from both solute and solvent molecules and fitted to Protopapas, Anderson, and Parlee's formula, the prediction with the Sung–Stell theory is found to agree to within ±7% of experimental data for wide ranges of solute-to-solvent mass and size ratios at temperatures up to the critical point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448390
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  • 5
    Electronic Resource
    Electronic Resource
    Regeneration of haploid and dihaploid plants from protoplasts of supersweet (sh2sh2) corn (1989)
    Springer
    Plant cell reports 8 (1989), S. 313-316 
    Details
    ISSN: 1432-203X
    Keywords: Zea mays L. ; supersweet corn ; protoplasts ; haploids ; plant regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Plants were regenerated from maize (Zea mays L.) protoplasts isolated from embryogenic cell suspensions. The donor maize suspension cultures were established from friable callus initiated from microspores of a commercial supersweet hybrid (sh2sh2). The frequency of cell colony formation was higher when protoplasts were cultured on feeder layers of maize cells as compared with a liquid thin layer method. It was demonstrated that haploid and dihaploid soil-grown plants can be regenerated from maize protoplasts isolated from haploid cell cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00716662
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  • 6
    Electronic Resource
    Electronic Resource
    Changes of plasma osmolality, chloride concentration and gill Na−K-ATPase activity in tilapia Oreochromis mossambicus during seawater acclimation (1989)
    Springer
    Marine biology 100 (1989), S. 295-299 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes of plasma osmolality, chloride concentration and gill Na−K-ATPase activity in tilapia Oreochromis mossambicus (obtained from Tainan Fish Culture Station of Taiwan Fisheries Research Institute, 1987) during seawater acclimation were examined. Three experiments were performed. (1) Freshwater (FW) to 30‰ salinity seawater (SW): plasma osmolality and chloride rose violently immediately post-transfer. At 6 h, gill Na−K-ATPase activity began to increase but most fish died from excessive plasma osmolality and Cl. (2) FW to 20‰ salinity SW: plasma osmolality and chloride increased immediately post-transfer, but more slowly than in (1), and began to decrease at 24 h. However it was not until 12 h post-transfer that gill Na−K-ATPase activity rose slowly. (3) FW to 20‰ salinity SW for 24 h, then to 30‰ salinity SW: after transfer to 30‰ salinity, plasma osmolality and chloride showed only a small increase initially then declined, while gill Na−K-ATPase activity started to rise rapidly within 3 h. The present results coincided with our previous morphological data concerning the ultrastructural responses of gill chloride cells. These are discussed to elucidate the osmoregulation mechanisms in tilapia during seawater acclimation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391142
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  • 7
    Electronic Resource
    Electronic Resource
    Internal material damping of polymer matrix composites under off-axis loading (1985)
    Springer
    Journal of materials science 20 (1985), S. 2575-2585 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The objective of this paper is to determine theoretically the material damping of short fibre-reinforced polymer matrix composites. The major damping mechanism in such composites is the viscoelastic behaviour of the polymer matrix. The analysis was carried out by developing a finite-element program which is capable of evaluating the stress and strain distribution of short fibre composites under axial loading (see Fig. 1a). Using the concept of balance of force we can express the modulusE x along the loading direction as a function of the mechanical properties of the fibre and matrix materials, fibre aspect ratio,l/d, loading angle,θ, and fibre volume fraction,V f. Then we apply the elastic-viscoelastic correspondence principle to replace all the mechanical properties of the composite, fibre and matrix materials such asE x,E f,E m,G m, by the corresponding complex moduli such asE x ′ +iE x ″ , andE f ′ +iE f ″ . After separation of the real and imaginary parts, we can expressE ' x/t' andE x t" as functions of the fibre aspect ratio,l/d, loading angle,θ, stiffness ratio,E f/E m, fibre volume fraction,V f, and damping properties of the fibre and matrix materials such asη f andη m. Numerical results of the composite storage modulus,E x ′ , loss modulus,E x ″ , and loss factor (damping),η C, are plotted as functions of parameters such asl/d,θ,V f, and are discussed in terms of variations ofl/d,θ, andE f/E m, in detail. It is observed that for a given composite, there exist optimum values ofl/d andθ at whichE x ″ andη c are maximized. The results of this paper can be used to optimize the performance of composite structures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00556089
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  • 8
    Electronic Resource
    Electronic Resource
    Prediction of material damping of laminated polymer matrix composites (1987)
    Springer
    Journal of materials science 22 (1987), S. 1006-1012 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this study the material damping of laminated composites is derived analytically. The derivation is based on the classical lamination theory in which there are eighteen material constants in the constitutive equations of laminated composites. Six of them are the extensional stiffnesses designated by [A] six of them are the coupling stiffnesses designated by [B] and the remaining six are the flexural stiffnesses designated by [D]. The derivation of damping of [A], [B] and [D] is achieved by first expressing [A], [B] and [D] in terms of the stiffness matrix [Q](k) andh k of each lamina and then using the relations ofQ ij (k) in terms of the four basic engineering constantsE L,E T, GLT andv LT. Next we apply elastic and viscoelastic correspondence principle by replacingE L,E T...by the corresponding complex modulusE L *,E T *,..., and [A] by [A]*, [B] by [B]* and [D] by [D]* and then equate the real parts and the imaginary parts respectively. Thus we have expressedA ij ′,A y ″,B ij ′,B ij ″, andD ij ″ in terms of the material damping ηL (k) and ηT (k)...of each lamina. The damping ηL (k), ηT (k)...have been derived analytically by the authors in their earlier publications. Numerical results of extensional damping lη ij =A ij ″/A ij ′ coupling dampingcη ij =B ij ″/B ij ′ and flexural damping Fη ij =D ij ″/D ij ″ are presented as functions of a number of parameters such as fibre aspect ratiol/d, fibre orientation θ, and stacking sequence of the laminate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01103543
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  • 9
    Electronic Resource
    Electronic Resource
    Somatic embryogenesis and plant regeneration from immature inflorescence segments of Coix lacryma-jobi (1986)
    Springer
    Plant cell, tissue and organ culture 5 (1986), S. 175-178 
    Details
    ISSN: 1573-5044
    Keywords: cereals ; somatic embryogenesis ; tissue culture ; Coix lacryma-jobi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Callus was obtained from segments of immature inflorescence of Coix lacryma-jobi cultured on N6 medium containing 1–2 mg/l 2,4-dichlorophenoxyacetic acid (2,4-D) and 3–5% sucrose. Plantlets were regenerated when embryogenic calluses were transferred onto MS medium with 0.5 mg/l kinetin and 0.01 mg/l naphthaleneacetic acid (NAA). Regenerated plants had the diploid chromosome number (2n=20).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040127
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  • 10
    Electronic Resource
    Electronic Resource
    Polymer-modified silica glasses (1987)
    Springer
    Polymer bulletin 18 (1987), S. 259-264 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The functionality of divinyl-terminated poly(dimethylsiloxane) (PDMS) was greatly increased by a substitution reaction to give PDMS with triethoxysilyl chain ends. Samples having number-average molecular weights of 720 and 17.6 × 103 g mol−1, and mixtures thereof, were added to tetraethoxysilane (TEOS) or a related silane. The functionalized PDMS-silane mixtures were hydrolyzed in the usual sol-gel technique to give polymer-modified silica glasses. The hardness of the glasses was measured, and then related to the molecular weight of the PDMS, its molecular weight distribution, the composition of the PDMS-silane mixtures, and the nature of the silane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255119
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