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  • 1
    Electronic Resource
    Electronic Resource
    The genetic control of grain esterases in hexaploid wheat (1984)
    Springer
    Theoretical and applied genetics 68 (1984), S. 219-226 
    Details
    ISSN: 1432-2242
    Keywords: Hexaploid genotypes ; Allelic variation ; Esterase ; Isozymes ; Isoelectric focusing ; Wheat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Analysis of grain esterase isozymes in Chinese Spring aneuploid genotypes by IEF confirmed that genes on the long arms of chromosomes 3A, 3B and 3D (Est-5) control the production of 19 isozymes. Allelic variants have been found for the isozyme pattern controlled by each chromosome. Segregational data involving null alleles and complex phenotypic differences indicate that the wheat grain esterases are encoded by three compound and probably homoeoallelic loci, each capable of producing at least six different isozymes. In a sample of 138 hexaploid genotypes, seven alleles were distinguished.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266893
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  • 2
    Electronic Resource
    Electronic Resource
    The genetics of β-amylase isozymes in wheat (1983)
    Springer
    Theoretical and applied genetics 66 (1983), S. 39-49 
    Details
    ISSN: 1432-2242
    Keywords: Hexaploid wheat ; β-amylase ; Isozymes ; Isoelectric focusing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Thirty-three β-amylase isozymes were separated in ‘Chinese Spring’ by IEF and the structural genes encoding seventeen of these were located by nullisomic analysis. The locations of the previously reported β-Amy-1 loci on chromosome arms 4Aβ (β-Amy-A1) and 4DL (β-Amy-D1) were confirmed and another set, β-Amy-2, was found on the group 5 chromosomes. A locus on 5AL (β-Amy-A1) was identified by nullisomic analysis and another on chromosome 5B (β-Amy-B2) was identified by analysis of inter-varietal chromosome substitution lines. The loci are complex, each coding for several isozymes, and allelic variation occurs at all four. Two alleles were identified at β-Amy-A1, five at β-Amy-D1, five at β-Amy-A2 and two at β-Amy-B2. Eleven different β-AMY phenotypes were distinguished amongst the 46 wheat varieties screened. The β-Amy-A2 locus was mapped by employing chromosome 5A recombinant lines and found to be closely linked and proximal to the awn inhibitor, B1, on the long arm. An attempt to map the β-Amy-D1 locus on chromosome 4D showed the gene to be located in the distal region of the long arm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00281846
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    First results of electron cooling experiments at LEAR (1989)
    Springer
    The European physical journal 332 (1989), S. 171-188 
    Details
    ISSN: 1434-601X
    Keywords: 29.20 ; 41.80.D
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The first results are presented of electron cooling experiments in the Low-Energy Antiproton Ring (LEAR) at CERN, performed with a proton beam of about 50 and 21 MeV. The number of stored protons ranged from 107 to 3 × 109. Cooling times of the order 1 s and proton drag rates of up to 0.7 MeV/s were obtained. The capture of cooling electrons by protons producing hydrogen atoms was used to derive an effective electron temperature (0.25 eV). From the angular profile of the neutral hydrogen beam an upper limit of 3π mm.mrad could be deduced for the horizontal equilibrium proton-beam emittance. The lowest equilibrium momentum spread was 2 × 105 (FWHM), as derived from the analysis of the longitudinal Schottky signal. This Schottky signal exhibited an unusual behaviour with beam intensity and under certain conditions showed a doublepeak structure which was associated with collective beam noise. For very cold beams transverse instabilities were observed, which resulted in a rapid spill-off of protons and a stabilization at lower intensities. The threshold of these instabilities was raised by heating the proton or the electron beam. The cooling of a bunched proton beam was investigated. The reduction of the proton momentum spread led to bunch lengths of about 2 m, containing 3 × 108 protons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01289773
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Intravenous digital subtraction angiography of orbital and ocular circulation (1985)
    Springer
    International ophthalmology 8 (1985), S. 153-158 
    Details
    ISSN: 1573-2630
    Keywords: digital subtraction angiography ; orbital and ocular circulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In serial experiments on cats, intravenous digital subtraction angiography (DSA) was utilized to observe orbital and ocular circulation. Images of the orbital arterial system as well as normal ocular vasculature were obtained, utilizing dosage of contrast material acceptable for human study. Images obtained after intraarterial DSA had no advantage over those obtained with intravenous DSA. After retrobulbar injection of 3 ml of saline, intravenous DSA demonstrated straightening of the external ophthalmic arteries showing the potential of this method for identifying orbital vascular pathology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00136492
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  • 5
    Electronic Resource
    Electronic Resource
    Scanning electron microscopy of vascular casts of the human scleral lamina cribrosa (1984)
    Springer
    International ophthalmology 7 (1984), S. 95-100 
    Details
    ISSN: 1573-2630
    Keywords: lamina cribrosa ; vasculature ; scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Vascular casts of the human lamina cribrosa region were studied in three autopsy specimens utilizing scanning electron microscopy (S.E.M.) in own modified technique. The lamina cribrosa is supplied from two major sources, the short posterior ciliary artery within the sclera and the distal optic nerve sheath pial vasculature. Recurrent choroidal arteries supplied a small number of centripetal branches to the lamina cribrosa. The central retinal artery did not give off centrifugal branches as it coursed through the lamina. The findings in these three human cases in three-dimensial visualization support other recent studies using serial histologic sectioning techniques. The photomicrographs are presented as a first successful images in S.E.M. for additional appreciation of the topographic morphology of radial arterioles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00165110
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Acid pulses from snowmelt at acidic cone pond, New Hampshire (1987)
    Springer
    Water, air & soil pollution 34 (1987), S. 325-338 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A study was undertaken to examine whether ‘acid pulses’ from snowmelt created permanent changes in a pond's chemistry. Water samples were collected from clearwater acidic Cone Pond in the White Mountain National Forest, New Hampshire. The pond, inlet, and outlet were intensively sampled throughout winter and early spring 1983–84. Thaws brought more H+ into upper waters of the pond, but most was gone within a week. In contrast, SO4 2− and Al showed dilution with increased streamflow into the pond, and NO3 − was only detected in ice, slush, and surface waters. Bottom waters were anoxic throughout the winter and had pH 6.0 compared to 4.7 for most of the water column. Alkalinity at the bottom rose from 0 in November 1983 to 190 μeq L−1 in April 1984. Between November and April the pond gained Al but lost SO4 2− and H+. Most of the Al gain came after ice-out when loading through the inlet increased, but during the final snowmelt a temporary increase in Al concentration was also seen throughout the water column.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00193780
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    Paper (German National Licenses)
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