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  • 1990-1994  (20)
  • 1965-1969
  • 1955-1959
  • 1992  (12)
  • 1991  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Vortex dynamics in oscillatory chemical systems (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Chaos 1 (1991), S. 421-434 
    Details
    ISSN: 1089-7682
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Vortex core dynamics is studied in the Brusselator both near to and far from the Hopf bifurcation line for random and pair initial conditions. Extensive simulations are carried out for a pair of counter-rotating vortices close to the Hopf bifurcation line. Provided the vortices are not so far apart that wave-front annihilation produces strong gradients between their centers, the simulation results compare favorably with theories based on the complex Ginzburg–Landau equation. Far from the Hopf line the vortex core dynamics changes character and phenomena such as periodic motion of the vortex centers arise.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.165852
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  • 2
    Electronic Resource
    Electronic Resource
    Interdiffusion problems at CdTe/InSb heterointerfaces grown by temperature gradient vapor transport deposition (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 1101-1103 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: CdTe epitaxial films were grown by a simple method of temperature gradient vapor transport deposition on p-InSb (111) orientation substrates in the growth temperature range between 200 and 280 °C. Raman spectroscopy showed the optical phonon modes of the CdTe thin films and the formation of an indium telluride interfacial layer in the CdTe/InSb heterostructures. The stoichiometry of the CdTe/InSb heterostructures was observed by the Auger electron spectroscopy, and Auger depth profiles also demonstrated that the CdTe/InSb heterointerface was not abrupt. The results indicated that the films grown at about 265 °C posed a significant problem due to interdiffusion from the InSb substrates during the growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.107681
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of titania aerogels (1992)
    s.l. : American Chemical Society
    Chemistry of materials 4 (1992), S. 1329-1333 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00024a037
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  • 4
    Electronic Resource
    Electronic Resource
    Characterization of the structural properties of .alpha.1B, a peptide designed to form a four-helix bundle (1992)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 114 (1992), S. 331-337 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00027a043
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  • 5
    Electronic Resource
    Electronic Resource
    Molecular cloning of the ViaB region of Salmonella typhi (1991)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 90 (1991), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The ViaB region required for Vi antigen production in Salmonella typhi was cloned. The plasmid pGBM124 containing a 14-kb S. thypi chromosomal DNA fragment conferred the ability to produce Vi antigen on Escherichia coli HB101 and ViaB-deleted S. typhi GIFU10007-3. Tn5 insertion analysis showed that the 14-kb DNA was split into three regions. Region 1 and region 2 are involved in the biosynthesis of Vi polysaccharide. Region 3 is involved in translocation of the Vi polysaccharide to the cell surface. Southern blot hybridization showed that regions 2 and 3 but not region 1, were considerably homologous to the DNA of Vi-positive Citrobacter freundii.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1991.tb05124.x
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of agrobacterial oncogenes in kidney vetch (Anthyllis vulneraria L.) (1992)
    Springer
    Plant cell reports 11 (1992), S. 363-367 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Kidney vetch seedlings were induced to form hairy roots by inoculating their mesocotyls with the wild-type strain 15834 of Agrobacterium rhizogenes or with the A. tumefaciens strain C58C1 containing a binary vector system (the pRiA4b as a helper and the vector pCB1346 bearing a pTiC58-derived isopentenyl transferase gene (ipt, cytokinin biosynthetic gene) under control of its native regulatory sequences). Transgenic lines of three distinct phenotypes were selected: (i) Typically, the pRi15834-transformed tissues were stabilized in vitro and maintained for long periods as aseptic, fast-growing, hormone-independent, plagiotropic hairy root cultures which never regenerated shoots and lost the ability to synthesize opines. Their genomic DNA contained both the TL- and the TR-DNA. (ii) One of the HR-lines transgenic for the T-DNA of pRi15834 (named 52AV34) started to regenerate spontaneously into teratomous shoots. The shoots were found to produce opines and both the TL and TR parts of T-DNA were found to be partly deleted and/or rearranged. They contained phytohormones in similar levels as those found in seed-born shoots. (iii) A practically identical morphogenic response as in the line 52AV34 was observed in the clone 27AV46. However, its shooty, dark-green, slow-growing teratomas were proven to be kanamycin-resistant, opine-producing, and double-transformed by the pRiA4b sequences and the ipt gene. They over-produced auxins as well as cytokinins (mainly indoleacetylaspartic acid and ribosides of zeatin and isopentenyladenine).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233367
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  • 7
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of mefloquine in the presence of primaquine (1992)
    Springer
    European journal of clinical pharmacology 42 (1992), S. 559-560 
    Details
    ISSN: 1432-1041
    Keywords: Mefloquine ; Thai subjects ; pharmacokinetics ; Primaquine ; drug interaction ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314870
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of ampicillin on mefloquine pharmacokinetics in thai males (1991)
    Springer
    European journal of clinical pharmacology 40 (1991), S. 631-633 
    Details
    ISSN: 1432-1041
    Keywords: Mefloquine ; ampicillin ; Thai subjects ; pharmacokinetics ; enterohepatic recycling ; drug interaction ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The kinetics of a single oral dose of mefloquine given either alone or with ampicillin has been studied in 8 healthy Thai male volunteers. There was a significantly higher maximum whole blood mefloquine concentration after coadministration with ampicillin (1648 vs 1228 ng·ml−1), as well as a significantly reduced terminal half life (15.3 vs 17.7 days), mean residence time (20.1 vs 23.4 days) and volume of distribution at steady state (14.1 vs 19.4 l·kg−1). Although there was no significant change in the AUC from zero time to infinity, the AUC from zero time to 5 days was significantly increased by ampicillin (4.86 vs 3.27 μg·ml−1 day). These changes in mefloquine disposition after antibiotic treatment may be due both to an increase in fractional bioavailability and a reduction in the enterohepatic recycling of mefloquine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279985
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of tetracycline on mefloquine pharmacokinetics in Thai males (1992)
    Springer
    European journal of clinical pharmacology 43 (1992), S. 567-569 
    Details
    ISSN: 1432-1041
    Keywords: Mefloquine ; Tetracycline ; Thai subjects ; Thai subjects ; drug interaction ; pharmacokinetics ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The kinetics of a single oral dose of mefloquine given either alone or with tetracycline has been studied in 20 healthy Thai male volunteers. There was a significantly higher maximum whole blood mefloquine concentration after coadministration with tetracycline (1600 vs 1160 ng · ml−1), as well as a significantly reduced terminal half-life (14.4 vs 19.3 days), mean residence time (11.9 vs 16.0 days) and volume of distribution at steady state (13.3 vs 19.91 · kg−1). Although there was no significant change in the AUC from zero time to infinity, the AUC from zero time to 7 days was significantly increased by tetracycline (6.18 vs 4.76 μg · ml−1 · day). The changes in mefloquine disposition after tetracycline treatment are probably due to a reduction in enterohepatic recycling. The initial increase in mefloquine AUC without an apparent increase in side-effects suggests that this combination may have a place in the treatment of multi-drug resistant falciparum malaria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02285105
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  • 10
    Electronic Resource
    Electronic Resource
    A finite volume technique to simulate the flow of a viscoelastic fluid (1991)
    Springer
    Computational mechanics 8 (1991), S. 43-55 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Hydrodynamically developing flow of Oldroyd B fluid in the planar die entrance region has been investigated numerically using SIMPLER algorithm in a non-uniform staggered grid system. It has been shown that for constant values of the Reynolds number, the entrance length increases as the Weissenberg number increases. For small Reynolds number flows the center line velocity distribution exhibit overshoot near the inlet, which seems to be related to the occurrence of numerical breakdown at small values of the limiting Weissenberg number than those for large Reynolds number flows. The distributions of the first normal stress difference display clearly the development of the flow characteristics from extensional flow to shear flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370547
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