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  • 1
    Electronic Resource
    Electronic Resource
    Oxygen evolution from potassium chlorate (KClO3) catalyzed by metal oxides as air bag inflators (1991)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 30 (1991), S. 778-783 
    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/ie00052a023
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  • 2
    Electronic Resource
    Electronic Resource
    Nucleation and growth kinetics of AlN films on atomically smooth 6H–SiC (0001) surfaces (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 3612-3614 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nucleation and growth kinetics of AlN films on atomically smooth 6H–SiC (0001) surfaces, which were obtained by HCl etching at elevated temperatures prior to growth, were investigated. The surface morphology and the defect density of AlN films on such surfaces were significantly improved compared to those on as-received SiC surfaces. This is due to enhanced diffusion length and reduced incoherent boundaries at the coalescence regions of the AlN islands. AlN nuclei on the as-received SiC surface were crystallographically misaligned and thus induced incoherent boundaries at the coalescence stage, resulting in the delay of the two-dimensional growth mode transition and defect formation in AlN films. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1377309
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  • 3
    Electronic Resource
    Electronic Resource
    Cell size and nucleoid organization of engineered Escherichia coli cells with a reduced genome (2005)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 55 (2005), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The minimization of a genome is necessary to identify experimentally the minimal gene set that contains only those genes that are essential and sufficient to sustain a functioning cell. Recent developments in genetic techniques have made it possible to generate bacteria with a markedly reduced genome. We developed a simple system for formation of markerless chromosomal deletions, and constructed and characterized a series of large-scale chromosomal deletion mutants of Escherichia coli that lack between 2.4 and 29.7% of the parental chromosome. Combining deletion mutations changes cell length and width, and the mutant cells with larger deletions were even longer and wider than the parental cells. The nucleoid organization of the mutants is also changed: the nucleoids occur as multiple small nucleoids and are localized peripherally near the envelope. Inhibition of translation causes them to condense into one or two packed nucleoids, suggesting that the coupling of transcription and translation of membrane proteins peripherally localizes chromosomes. Because these phenotypes are similar to those of spherical cells, those may be a consequence of the morphological change. Based on the nucleoid localization observed with these mutants, we discuss the cellular nucleoid dynamics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.2004.04386.x
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  • 4
    Electronic Resource
    Electronic Resource
    8-Epixanthatin, a light-induced growth inhibitor, mediates the phototropic curvature in sunflower (Helianthus annuus) hypocotyls (1999)
    Copenhagen : Munksgaard International Publishers
    Physiologia plantarum 106 (1999), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The distribution of the endogenous auxin-inhibiting substance, 8-epixanthatin, was determined in the lighted and shaded sides of phototropically-stimulated, de-etiolated sunflower (Helianthus annuus L. cv. Taiyo) hypocotyls. From 40 min after the onset of phototropic stimulation, the growth rate at the lighted side was inhibited, whereas that at the shaded side showed no change. In the lighted side, 8-epixanthatin increased by 20 min after the onset of unilateral illumination and, after 40 min, reached a 3-fold larger concentration than that in the shaded side. Unilateral application of 8-epixanthatin suppressed the growth of etiolated hypocotyls at the applied side only, causing the hypocotyls to bend at the site of application. It is concluded that phototropic curvature in sunflower hypocotyls is caused by a lateral gradient of the auxin-inhibiting substance 8-epixanthatin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3054.1999.106310.x
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  • 5
    Electronic Resource
    Electronic Resource
    Degradation of the cyclin-dependent-kinase inhibitor p27 Kip1 is instigated by Jab1 (1999)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 398 (1999), S. 160-165 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The proliferation of mammalian cells is under strict control, and the cyclin-dependent-kinase inhibitory protein p27Kip1 is an essential participant in this regulation both in vitro and in vivo . Although mutations in p27Kip1 are rarely found in human tumours, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/18230
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  • 6
    Electronic Resource
    Electronic Resource
    Silencing factors participate in DNA repair and recombination in Saccharomyces cerevisiae (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 388 (1997), S. 900-903 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DNA double-strand breaks are repaired by homologous recombination or DNA end-joining, but the latter process often causes illegitimate recombination and chromosome rearrangements. One of the factors involved in the end-joining process is Hdf1, a yeast homologue of Ku protein. We used the yeast ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/388900a0
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  • 7
    Electronic Resource
    Electronic Resource
    Phase-Shifting Fringe Analysis for Laser Diode Wavelength-Scanning Interferometer (2000)
    Springer
    Optical review 7 (2000), S. 158-163 
    Details
    ISSN: 1349-9432
    Keywords: Wavelength scanning interferometry ; profile measurement ; laser diode ; phase-shifting technique ; stepped object
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A method for analyzing the fringe patterns obtained from a wavelength-scanning interferometer is proposed. It is based on phase retrieval with the phase-shifting method and derivation of its slope along the wave number axis. The accuracy and the error sources are estimated by experiments, in which a laser diode under small wavelength-modulation (-95pm) is used as the light source. A conventional piezoelectric phase shifter was used for a phase shifter. This technique can be applied to profile measurement of stepped objects located across the zero-path position.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-000-0158-y
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  • 8
    Electronic Resource
    Electronic Resource
    Active Phase-Shifting Interferometer Using Current Modulation of a Laser Diode (1996)
    Springer
    Optical review 3 (1996), S. 287-292 
    Details
    ISSN: 1349-9432
    Keywords: active phase-shifting interferometry ; laser diode ; feedback ; current modulation ; frequency response ; optical measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An active phase-shifting interferometer using current modulation of a laser diode is proposed. Fringe movement in the instrument is detected by a spatial filtering detector whose output is fed back to the injection current of the laser diode to lock the fringes and shift them correctly for phase shifting analysis. Frequency modulation characteristics of the laser diode and frequency response of the feedback system are first investigated. We constructed a portable interferometer head set apart from a mirror under test then measured the shape of a spherical mirror 130 mm in diameter, which was placed on a wooden table subject to vibration. Measurement repeatability of λ/35 was achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-996-0287-z
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  • 9
    Electronic Resource
    Electronic Resource
    Structural analyses of DNA fragments integrated by illegitimate recombination in Schizosaccharomyces pombe (1994)
    Springer
    Molecular genetics and genomics 244 (1994), S. 111-119 
    Details
    ISSN: 1617-4623
    Keywords: Illegitimate recombination ; S. pombe Nonhomologous integration ; Recombination junctions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to elucidate the mechanisms of illegitimate recombination in eukaryotes, we have studied the structure of DNA fragments integrated by illegitimate recombination into the genome of fission yeast. Nonhomologous recombination was rarely identified when a long region of homology with the chromosomal leu1 + gene was present in the introduced leu1::ura4 + DNA fragment; but a decrease in length of homology leads to an increase in the ratio of nonhomologous to homologous recombination events. The introduced DNA fragments were integrated into different sites in the chromosomes by nonhomologous recombination. The results suggested that there are multiple modes of integration; most events simply involve both ends of the fragments, while in other cases, fragments were integrated in a more complicated manner, probably via circularization or multimerization. To analyze the mechanism of the major type of integration, DNA fragments containing the recombination junctions of three recombinants were amplified by inverted polymerase chain reaction (IPCR) and their nucleotide sequences were determined. There was no obvious homology between introduced DNA and chromosomal DNA at these recombination sites. Furthermore it was found that each terminal region of the introduced DNA was deleted, but that there were no or very small deletions in the target sites of chromosomal DNA. Two models are proposed to explain the mechanism of nonhomologous integration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00283511
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  • 10
    Electronic Resource
    Electronic Resource
    Does Mutation of Transforming Growth Factor-β Type II Receptor Gene Play an Important Role in Colorectal Polyps? (1999)
    Springer
    Digestive diseases and sciences 44 (1999), S. 1803-1809 
    Details
    ISSN: 1573-2568
    Keywords: COLORECTAL POLYP ; MICROSATELLITE INSTABILITY ; HEREDITARY NONPOLYPOSIS COLORECTALCANCER ; MISMATCH REPAIR GENE ; TRANSFORMING GROWTH FACTOR-β TYPE IIRECEPTOR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Mutations in the transforming growthfactor-β type II receptor (RII) gene that remainuncorrected due to mutation and inactivation of mismatchrepair genes play an important role in hereditarynonpolyposis colorectal cancer (HNPCC) and in a subset ofsporadic colorectal cancers. Some colorectal cancersdevelop from colorectal polyps. To elucidate the role ofthe RII gene in the generation of colorectal polyps, we analyzed 137 colorectal polyps from 100patients for RII mutations and microsatelliteinstability (MSI). MSI was detected in three of 36polyps from 25 patients. For one of these three polyps,the mobilities of the PCR products between polyp and nonpolyptissues was different for only one microsatellitemarker, and for the other two polyps the mobilities weredifferent for more than two markers. These two polyps were obtained from one patient with ascendingcolon carcinoma and suspected HNPCC based on hisclinical profile and family history. An RII mutation wasdetected in only one of these two polyps. RII may play a minor role in sporadic colorectalpolyps. RII gene analysis in colorectal polyps may be auseful screening measure for potential HNPCCpatients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018834404570
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