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  • 1
    Electronic Resource
    Electronic Resource
    Optical amplification by monolithically integrated distributed-feedback lasers (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1577-1579 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Optical amplification gain up to 17.7 dB has been realized in monolithically integrated distributed-feedback lasers. Master laser lasing wavelength and slave laser amplified spontaneous emission wavelength must be tuned within 0.03 nm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98612
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  • 2
    Electronic Resource
    Electronic Resource
    Spin-down of the X-ray pulsar GX1 +4 during an extended low state (1988)
    [s.l.] : Nature Publishing Group
    Nature 333 (1988), S. 746-748 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] GX1 +4 (4U1728 -24) is a luminous binary X-ray pulsar near the Galactic centre13, with a ~2 min (or possibly twice this) pulse period and probably a 〉 100-day binary period7'13. From its discovery in the early 1970s until 1980, it was spinning up rapidly, with P = -7.5 x 10~8 s s-1 (P/P = -0.02 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/333746a0
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  • 3
    Electronic Resource
    Electronic Resource
    Discovery of an unusual hard X-ray source in the region of supernova 1987A (1987)
    [s.l.] : Nature Publishing Group
    Nature 330 (1987), S. 230-231 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have been regularly observing SN1987A from the X-ray astronomy satellite Ginga1'2 since 25 February 1987, immediately following the optical discovery2'3. Ginga carries a set of proportional counters of 4,000 cm2 effective area and a field of view of 2°x4° full width. SN1987A (hereafter ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/330230a0
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  • 4
    Electronic Resource
    Electronic Resource
    Circumstellar matter of SN1987A and soft X-ray emission (1988)
    [s.l.] : Nature Publishing Group
    Nature 335 (1988), S. 804-806 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Between early September and late December 1987, the intensity of the hard component of the X-ray emission from SN1987A was constant within statistical errors, whereas that of the soft X-rays fluctuated by a factor of about two on a timescale of a month. In January 1988 the intensity increased ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/335804a0
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  • 5
    Electronic Resource
    Electronic Resource
    Misreading of DNA templates containing 8-hydroxydeoxyguanosine at the modified base and at adjacent residues (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 77-79 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Figure 1 shows the nucleotide sequences of two synthetic 8-OH-dG-containing oligodeoxynucleotides (fragments B and D) and their counterparts with normal G in place of 8-OH-dG (fragments A and C) and gives details of their chemical synthesis. Figure 2 shows an example of the base composition and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327077a0
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  • 6
    Electronic Resource
    Electronic Resource
    Possible site of bronchodilation due to inhaled procaterol aerosol in asthmatic patients (1988)
    Springer
    European journal of clinical pharmacology 34 (1988), S. 433-437 
    Details
    ISSN: 1432-1041
    Keywords: procaterol ; airway responsiveness ; bronchodilator ; dynamic compliance ; Fourier analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We studied the effective site of an inhaled aerosol of procaterol, a β2-selective adrenergic bronchodilator, in 8 asthmatic patients whose basal lung functions are almost within the normal range in both slow vital capacity (VC) and forced expiratory volume in one second (FEV1.0), and are free from asthmatic attack. In patients who had received procaterol 30 min after inhalation of aerosol, there was no significant change in VC, although FEV1.0, maximal expiratory flow at 50% VC $$(\dot V_{50} )$$ , maximal expiratory flow at 25% VC $$(\dot V_{25} )$$ and maximal expiratory flow at 30% VC of partial maximal expiratory flow volume curve $$(\dot V_{30p} )$$ improved significantly. On the other hand, in those who had received placebo, none of the parameters changed. Furthermore, Rl decreased and C0.5 increased significantly during the first 5 min after inhalation of procaterol aerosol. After an interval of 5 min, Rl did not change any further, while C0.5 continued to improve until 30 min after inhalation of procaterol. These results suggest that procaterol may first dilate the large airway and then may gradually dilate the small airway in bronchial asthma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01046698
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  • 7
    Electronic Resource
    Electronic Resource
    Determination of pheophytinatonickel(II) by reversed-phase highperformance liquid chromatography (1988)
    Springer
    Chromatographia 25 (1988), S. 319-323 
    Details
    ISSN: 1612-1112
    Keywords: Column liquid chromatography ; Pheophytinatonicke(II) ; Chlorophyll ; Pheophytin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary HPLC determination of pheophytinatonicke(II) (Pheo-Ni) prepared by the replacement of magnesium(II) in chlorophyll with nicke(II) is described. The good separation of PheoNi was obtained by using chemically bonded C18 as the stationary phase and acetone-methanol (50∶50, vol/vol) as the mobile phase. Conventional spectrophotometric method was also used for the determination of PheoNi. For the synthetic samples prepared by mixing (pheophytinato a) nicke(II) [(Pheo-a) Ni] and (pheophytinato b) nicke(II) [(Pheo-b) Ni], analytical values obtained by the spectrophotometric method were very high compared to those obtained by HPLC. In the proposed HPLC method, (Pheo-a) Ni and (Pheo-b). Ni could be determined in the concentration range of 0.028–30μg/ml and 0.038–30μg/ml with relative standard deviations (n=10) of 3.1% and 0.8%, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02324707
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  • 8
    Electronic Resource
    Electronic Resource
    Identification of fetal hemoglobin in blood stains by high performance liquid chromatography (1989)
    Springer
    International journal of legal medicine 102 (1989), S. 437-444 
    Details
    ISSN: 1437-1596
    Keywords: Fetal hemoglobin, identification in blood stains ; Blood stains, identification of fetal hemoglobin ; Fetales Hämoglobin, in Blutspuren ; Blutspuren, Nachweis von fetalem Hämoglobin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Law
    Description / Table of Contents: Zusammenfassung Es wurde eine neue Methode zur Identifizierung von fetalem Hämoglobin (Hb F) in Blutspuren mit der umgekehrten Phase-Hochleistungsflüssigkeitschromatographie durchgeführt. Die Unterscheidung zwischen fetalen Blutspuren und denen von Erwachsenen erfolgte aufgrund der Existenz der Spitzen der γ-Ketten von Hb F. In den Chromatogrammen der untersuchten Blutspuren von Erwachsenen traten fast keine γ-Ketten auf. Diese Methode ermöglichte ferner die Bestimmung des Hb F-Wertes mit dem Flächenverhältnis der Globin-Ketten auf den Chromatogrammen. Hb F-Werte der sechs Fälle von Nabelschnurblutspuren auf dem Filterpapier lagen zwischen 81.1% und 91.3%. Die vorliegende Untersuchung zeigt, daß sich der Hb F-Wert für mindestens 12 Wochen nicht ändert. In der Praxis der Rechtsmedizin ist diese Methode im Hinblick auf die Einfachheit, hohe Empfindlichkeit, Schnelligkeit und Zuverlässigkeit sehr wertvoll.
    Notes: Summary A new method for the identification of fetal hemoglobin (Hb F) in blood stains by reverse-phase high performance liquid chromatography is described. Differentiation between fetal and adult blood stains is based on the existence of γ-chain peaks which are characteristic of Hb F. Very few γ chains appeared on chromatograms of all the adult blood stains examined. The level of Hb F could be determined by measuring the total of chromatogram γ-globin chain areas, and expressing it as a percentage of total Hb. Levels in six cord blood stains on filter paper ranged from 81.1% to 91.3% and remained constant for at least 12 weeks. This method is of great value for its simplicity, sensitivity and speed, and most importantly for its reliability in the field of forensic medicine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204074
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  • 9
    Electronic Resource
    Electronic Resource
    Characterization of Prussian blue and its thermal decomposition products (1989)
    Springer
    Hyperfine interactions 46 (1989), S. 723-731 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The mixed-valence state of Prussian blue and its thermal decomposition products has been studied by Mössbauer and infrared spectra, and X-ray powder diffraction and conductivity measurements. The57Fe Mössbauer spectra have revealed that the coordination environment of Prussian blue is not changed by the heat-treatment at lower than 200°C while the flipping of the cyano ligands takes place when the heat-treatment temperature exceeds 250°C. The electrical conductivity of the Prussian blue samples heat-treated in vacuo at 300 and 350°C is higher than that of the samples heat-treated at lower temperatures. All the spectral measurements have demonstrated that a new mixed-valence state is produced in Prussian blue by thermally flipping the cyano ligand and quenching the flipped cyano ligand to liquid nitrogen temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398265
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  • 10
    Electronic Resource
    Electronic Resource
    Mössbauer spectroscopic and magnetic properties of iron/III/ pheophytins (1989)
    Springer
    Journal of radioanalytical and nuclear chemistry 136 (1989), S. 159-168 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Mössbauer spectra of /pheophytinato a/ iron/III/ chloride [Fe/Pheo-a/Cl] and /pheophytinato b/ iron/III/ chloride [Fe/Pheo-b/Cl] have revealed that the central iron/III/ ion is in a high-spin state and axially coordinated by chloride ions in solid phase. Temperature-dependent asymmetry observed for the quadrupole splitting doublet of iron/III/ pheophytins, i.e., Fe/Pheo-a/Cl and Fe/Pheo-b/Cl, is interpreted on the basis of the zero-field splitting. The structural difference between iron/III/ pheophytins and iron/III/ porphyrins is reflected in the quadrupole splitting more than in the isomer shift. Magnetic behaviour of iron/III/ pheophytins near 4.2 K is very similar to that of iron/III/ porphyrins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164106
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