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  • 1
    Electronic Resource
    Electronic Resource
    Optical phase conjugation in InGaAs/GaAs multiple quantum wells at 1.06 μm wavelength (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 281-283 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The observation of phase conjugation in InGaAs/GaAs multiple quantum wells at 1.06 μm wavelength is reported on. The effective nonlinearity of the sample used in our experiments was measured to be χ(3)=10−7 esu. The nonlinearity is induced by the saturation absorption due to band filling and exciton bleaching. The saturation intensity is 1.3 kW/cm2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110078
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  • 2
    Electronic Resource
    Electronic Resource
    Copper(II) Complexes of Glycylglycine* (1964)
    s.l. : American Chemical Society
    Biochemistry 3 (1964), S. 1169-1174 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00896a028
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  • 3
    Electronic Resource
    Electronic Resource
    Local modification of the thin YBa2Cu3O7−y microstrips by the voltage-biased atomic force microscope tip (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 484-486 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The atomic force microscope (AFM) tip biased at around −15 V is found to be capable of locally modifying the entire thickness of 40-nm-thick semiconducting or superconducting YBa2Cu3O7−y microstrips in air. We show, using combined electrical and AFM measurements, that the local regions underneath the surface of the semiconducting or superconducting YBa2Cu3O7−y microstrips are transformed into either nonconducting or nonsuperconducting regions, respectively, upon applying the negatively biased AFM tip. The conductance of the nonsuperconducting regions is also found to be comparable to that of the superconducting regions before modification at 298 K. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125795
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  • 4
    Electronic Resource
    Electronic Resource
    Copper(II) Complexes of Triglycine and Tetraglycine1,2 (1966)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 88 (1966), S. 914-918 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00957a009
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  • 5
    Electronic Resource
    Electronic Resource
    Optimal pH control of batch processes for production of curdlan by Agrobacterium species (1999)
    Springer
    Journal of industrial microbiology and biotechnology 23 (1999), S. 143-148 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: curdlan production; optimal pH profile; batch process
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: We sought an optimal pH profile to maximize curdlan production in a batch fermentation of Agrobacterium species. The optimal pH profile was calculated using a gradient iteration algorithm based on the minimum principle of Pontryagin. The model equations describing cell growth and curdlan production were developed as functions of pH, sucrose concentration, and ammonium concentration, since the specific rates of cell growth and curdlan production were highly influenced by those parameters. The pH profile provided the strategy to shift the culture pH from the optimal growth condition (pH 7.0) to the optimal production one (pH 5.5) at the time of ammonium exhaustion. By applying the optimal pH profile in the batch process, we obtained significant improvement in curdlan production (64 g L−1) compared to that of constant pH operation (36 g L−1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900714
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  • 6
    Electronic Resource
    Electronic Resource
    Residual phosphate concentration under nitrogen-limiting conditions regulates curdlan production in Agrobacterium species (2000)
    Springer
    Journal of industrial microbiology and biotechnology 25 (2000), S. 180-183 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: curdlan; production; phosphate concentration; Agrobacterium sp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: We investigated the influence of inorganic phosphate concentration on the production of curdlan by Agrobacterium species. A two-step culture method was employed where cells were first cultured, followed by curdlan production under nitrogen-limiting conditions. In the curdlan production step, cells did not grow but metabolized sugar into curdlan. Shake-flask experiments showed that the optimal phosphate concentration for curdlan production was in the range of 0.1–0.3 g l−1. As the cell concentration increased from 0.42 to 1.68 g l−1 in shake-flask cultures, curdlan production increased from 0.44 to 2.80 g l−1. However, the optimal phosphate concentration range was not dependent upon cell concentration. The specific production rate was about 70 mg curdlan g-cell−1 h−1 irrespective of cell concentration. When the phosphate concentration was maintained at 0.5 g l−1 under nitrogen-limiting conditions, as high as 65 g l−1 of curdlan was obtained in 120 h. Journal of Industrial Microbiology & Biotechnology (2000) 25, 180–183.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.7000053
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  • 7
    Electronic Resource
    Electronic Resource
    High-frequency induction of adventitious shoots from hypocotyl segments of Liquidambar styraciflua L. by thidiazuron (1997)
    Springer
    Plant cell reports 16 (1997), S. 536-540 
    Details
    ISSN: 1432-203X
    Keywords: Key words Adventitious shoots ; Ex vitro rooting ; Sweetgum (Liquidambar styraciflua) ; Thidiazuron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of thidiazuron (TDZ) on adventitious bud and shoot formation from hypocotyl segments of sweetgum (Liquidambar styraciflua) were tested alone and in combination with 2,4-dichlorophenoxyacetic acid (2,4-D). The combination of 1 mg/l TDZ with 0.01 mg/l 2,4-D resulted in the highest frequency of bud production. Lower concentrations of TDZ stimulated shoot production, generating the most shoots at 0.1 mg/l TDZ with 0.01 mg/l of 2,4-D. Inhibition of shoot elongation by TDZ was overcome by transferring shoot cultures to a shoot proliferation medium lacking TDZ or containing naphthaleneacetic acid and benzyladenine in addition to TDZ. Shoot production in liquid culture was significantly greater than that in solid culture. Comparisons of in vitro and ex vitro rooting of the adventitious shoots demonstrated that ex vitro rooting produced plants with faster growth rates and more extensive root systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01142319
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  • 8
    Electronic Resource
    Electronic Resource
    Isolation of a phospholipase A1-producing microorganism (1996)
    Springer
    Journal of industrial microbiology and biotechnology 16 (1996), S. 171-174 
    Details
    ISSN: 1476-5535
    Keywords: screening ; Serratia ; phospholipase A1 ; positional specificity ; nutritional factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A bacterium which has phospholipase A1 activity was isolated from soil. It is aerobic, motile, oxidase-negative and has flagella. The G+C content of the DNA was 58.1 mol%. The major isoprenoids of cell was were Q-8 and MK-8. The main cellular fatty acids were saturated straight chain (n-16) and cyclic (17:Δ) fatty acids. Based on its morphological, physiological and chemotaxonomic characteristics, this organism was placed in the genusSerratia. Nutritional factors affecting enzyme production were explored. Xylose and ammonium sulfate were the best carbon and nitrogen sources, respectively. Ferrous ions exerted a considerable positive effect on enzyme production. The optimal pH and temperature for phospholipase A1 production were 7.0 and 30°C, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570000
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  • 9
    Electronic Resource
    Electronic Resource
    Production of curdlan using sucrose or sugar cane molasses by two-step fed-batch cultivation of Agrobacterium species (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 255-259 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: curdlan production; Agrobacterium sp; nitrogen limitation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Maltose and sucrose were efficient carbon sources for the production of curdlan by a strain of Agrobacterium sp. A two-step, fed-batch operation was designed in which biomass was first produced, followed by curdlan production which was stimulated by nitrogen limitation. There exists an optimal timing for nitrogen limitation for curdlan production in the two-step, fed-batch operation. Maximum curdlan production (60 g L−1) was obtained from sucrose with a productivity of 0.2 g L−1 h−1 when nitrogen was limited at a cell concentration of 16.0 g L−1. It was also noted that the curdlan yield from sucrose was as high as 0.45 g curdlan g−1 sucrose, and the highest specific production rate was 1.0 g curdlan g−1 cells h−1 right after nitrogen limitation. Of particular importance was the use of molasses as a cheap carbon source to produce curdlan in the two-step, fed-batch cultivation. As high as 42 g L−1 of curdlan with a yield of 0.35 g curdlan g−1 total sugar was obtained after 120 h of fed-batch cultivation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900378
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  • 10
    Electronic Resource
    Electronic Resource
    High-frequency induction of adventitious shoots from hypocotyl segments ofLiquidambar styracifiua L. by thidiazuron (1997)
    Springer
    Plant cell reports 16 (1997), S. 536-540 
    Details
    ISSN: 1432-203X
    Keywords: Adventitious shoots ; Ex vitro rooting ; Sweetgum (Liquidambar styraciflua) ; Thidiazuron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of thidiazuron (TDZ) on adventitious bud and shoot formation from hypocotyl segments of sweetgum (Liquidambar styracifiua) were tested alone and in combination with 2,4-dichlorophenoxyacetic acid (2,4-D). The combination of 1 mg/1 TDZ with 0.01 mg/l 2,4-D resulted in the highest frequency of bud production. Lower concentrations of TDZ stimulated shoot production, generating the most shoots at 0.1 mg/1 TDZ with 0.01 mg/1 of 2,4-D. Inhibition of shoot elongation by TDZ was overcome by transferring shoot cultures to a shoot proliferation medium lacking TDZ or containing naphthaleneacetic acid and benzyladenine in addition to TDZ. Shoot production in liquid culture was significantly greater than that in solid culture. Comparisons of in vitro and ex vitro rooting of the adventitious shoots demonstrated that ex vitro rooting produced plants with faster growth rates and more extensive root systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01142319
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