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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (1136 pages)
    Edition: 1st ed.
    ISBN: 9783662111819
    Series Statement: Astronomy and Astrophysics Abstracts Series ; v.23/24
    Language: English
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  • 2
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    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 45(1), pp. 65-67, ISSN: 0032-2490
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
    Format: application/pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 25 (1992), S. 340-347 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The performance of a high-energy-resolution X-ray spectrometer using the characteristic 7.47815 keV Kα1 emission line of Ni is described. Monochromatization of this line is achieved by Bragg reflection on a focusing perfect single-crystal of silicon in near-backscattering geometry (ΘB = 89.61°). With the 533 reflection, a reasonable matching between the lattice parameter d and the X-ray wavelength λ was achieved (λ = 2d sin ΘB ∼ 2d). Tuning the X-ray energy is performed by changing the temperature, which changes the lattice spacing d of the silicon crystal. The energy resolution of the monochromator alone was 38 meV. The energy resolution of the whole instrument, measured with an analyser equal in construction to the monochromator, was 54 meV, in good agreement with a calculated value. The intensity of the monochromatic X-rays was 4.5 × 106 quanta s−1, concentrated on a spot with a full width at half-maximum of 2.7 mm, if a 10 kW X-ray generator (U = 50 keV, I = 200 mA) is used. Again, this value is in good accordance with calculations using published data for X-ray emission. The effective spot size of the electron beam was 1 × 1 mm. It is shown that, in principle, an intensity increase of a further order of magnitude is possible by heating the silicon crystal to 570 K.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 206 (1978), S. 183-190 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An Sektionsmaterial wurden 91 Kryoextraktionen klarer Linsen ausgeführt. Der sklerale Schnitt wurde in den Kammerwinkel gelegt und umfaßte etwa 330°. Die Hornhaut mit der anhängenden Sklera konnte dadurch ganz zur Seite geklappt werden und behinderte eine Extraktion in Richtung der Verlängerung der optischen Achse nicht. Die Pupillen haben wir medikamentös erweitert. Die Kryosonde wurde am vorderen Linsenpol angefroren; sie war an einem Waagebalken befestigt, dessen anderes Ende als Gegengewicht einen Wasserbehälter trug. Die Extraktion erfolgte durch Wasserzugabe in diesen Behälter. Die notwendige zusätzliche Wassermenge diente als Maß für die Reißfestigkeit der Zonula. Die durchschnittliche Reißfestigkeit der Zonula nahm hoch signifikant mit dem Lebensalter ab. Die Standardabweichung war aber in allen Lebensaltern sehr groß. Zwischen rechten und linken Augen wurde kein signifikanter Unterschied gefunden. Der methodische Fehler erwies sich als klein. Ernährungszustand und Zeitintervall zwischen Tod und Versuchsbeginn hatten keinen signifikanten Einfluß. Das Lebensalter allein erwies sich als unzuverlässiger Indikator für die Reißfestigkeit der Zonula. Die Ergebnisse gelten für klare Linsen. Aus der klinischen Erfahrung ist bekannt, daß die verschiedenen Kataraktformen die Reißfestigkeit der Zonula in unterschiedlichem Ausmaß beeinflussen.
    Notes: Summary A series of 91 cryoextractions was performed on autopsy material. The scleral section was placed near to the chamber angle and was nearly circumferential (about 330°). Cornea and adjacent sclera could be flapped over this way, and did not interfere with a straightforward lens extraction. The pupil was medically dilated. A cryoprobe was fixed to a specially constructed scale, and frozen to the anterior pole of the lens. Its weight was counter-balanced by a plastic water container at the other end of the scale. The extraction was performed by filling additional water into the counterbalancing container. The statistical evaluation of the results showed a very significant dependence of the average tensile strength on age. However, a considerable standard deviation was found throughout all ages. The nutritional state of the autopsy bodies and the time interval between death and start of the measurement had no significant influence. The differences between right and left eyes were also not signifincant, as could be expected. The methodological error remained small. Age proved to be an unreliable indicator for the tensile strength of the zonule. All results apply to clear lenses. We know from clinical experience that the tenacity of the zonule may also be different in the various types of cataract.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The time function of corticosteroid level in plasma of rats under two different222Rn concentrations was investigated. Both curves show a maximum after 8 h. Whereas the higher activity of222Rn produces a second maximum after 5 days, the lower activity reaches its second maximum not before 9 days. From both time functions, a two-step mechanism in the intracellular control can be concluded.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 69 (1991), S. 68-75 
    ISSN: 1432-1440
    Keywords: Hematuria ; Proteinuria ; α 2-Macro-globulin ; IgG ; Albumin ; α 1-Microglobulin ; Turbidimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Hematuria caused by prerenal, glomerular, postglomerular, and postrenal causes is usually differentiated by a number of noninvasive and invasive diagnostic procedures. In the present study we have applied a new analytical strategy based on observations that the various forms of hematuria can be classified by their typical protein pattern. When analyzed by quantitative turbidimetric assays, urines from postrenal hematurias contained high-molecular-weight proteins (α 2-macroglobulin and IgG) in proportions found in plasma. Relating excretion rates (mg/mg) of these proteins to those of albumin, ratios forα 2-macroglobulin/albumin and IgG/albumin were 2.0−31×10−2 and 20.0 –180×10−2, respectively. In contrast, glomerular hematurias exhibited ratios of 0.01−2.0×10−2 (α 2macroglobulin/albumin) and 2.0−20×10−2 (IgG/albumin). Additional determination ofα 1-microglobulin allowed us to differentiate postglomerular hematurias caused by interstitial nephropathies from glomerular and postrenal diseases. Critical evaluation of 93 cases diagnosed by independent clinical examination including histology, sonography, and cystoscopy revealed that the criteria derived from protein measurements resulted in correct classification when urine albumin exceeds 100 mg/l. This noninvasive procedure is expected to be of considerable help in the primary care of patients with unexplained hematuria.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 63 (1976), S. 438-438 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 64 (1977), S. 650-650 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 419 (1991), S. 153-157 
    ISSN: 1432-2307
    Keywords: Autoimmune hepatitis ; Chronic interstitial pneumonitis ; Autoimmune haemolytic anaemia ; Endogenous lectins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The clinical history, radiological and histomorphological alterations of the lung parenchyma associated with chronic active autoimmune hepatitis are described. A 6-month-old female infant developed chronic active autoimmune hepatitis associated with autoimmune haemolytic anaemia. She was treated with immunosuppressive drugs, including steroids, for more than 6 years and developed symptoms and radiological signs of interstitial pneumonitis 4 years after onset of the autoimmune hepatitis. Associated bronchiectasis was detected 1 year later. No abnormalities of lung defence mechanisms could be demonstrated. Resection of the sixth left segment and of the basal parts of the left lower lobe revealed honeycombing with changes in the lung parenchyma which included chronic interstitial pneumonitis with multinucleate giant cells, seen predominantly in the distal airways, marked diffuse interstitial mononuclear infiltrates and mild diffuse interstitial fibrosis as well as bronchiectasis and organizing pneumonia. Granulomatous lesions, angiitis and necrotic areas were absent. Immunohistochemistry for immunoglobulins was negative for IgA, IgG and IgM and positive for IgD in the multinucleate giant cells. A strong positive reaction to HLA-DR-specific monoclonal antibody was noted, whereas no specific sugar receptors (endogenous lectins) could be detected by use of biotinylated glyconeoproteins.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 366 (1975), S. 67-74 
    ISSN: 1432-2307
    Keywords: Cornea-Lesion ; Rabbit-Tissue Culture ; Leucocytoid Cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer Versuchsreihe an 15 Kaninchen wurde an der Hornhaut des linken und rechten Auges mittels einer glühenden Nadel eine sog. zentrale Keratitis induziert. Die Cornea des linken Auges wurde unter sterilen Bedingungen sofort exstirpiert und 6 Tage in der Gewebekultur beobachtet. Das korrespondierende rechte Auge wurde beim 1. Kaninchen sofort, später nach 1/2, 1, 1 1/2, 2 Std usw. bis zu 11 Tagen im Tierkörper belassen, dann exstirpiert und histologisch aufgearbeitet. An den Hornhautexplantaten beobachteten wir folgende Veränderungen: Nach gesetzter Läsion ist die Stichstelle ohne Epithel. Direkt um den Krater liegt ein doppelter Zellwall. Nach 1 1/2 Std kommt es zu einer starken Vermehrung von großen runden Zellen mit mehr oder weniger segmentierten Kernen. Den gleichen Vorgang findet man an den Explantaträndern. Die charakteristische Kernform, die schwach positive Naphthol-ASD-Chloracetatesterase-Reaktion und einer wechselnde Peroxydase-Reaktion machen diese Zellen phänomenologisch und fermenthistochemisch leukocytenähnlich. Wir nennen sie leukocytoide Zellen. Es sind keine Leukoeyten, sondern Zellen, die ihren Ursprung von basal liegenden pluripotenten Epithelien der Cornea nehmen. Die sog. zentrale Keratitis ist keine Entzündung im Sinne Marchands, es handelt sich vielmehr um einen regenerativen Vorgang. Die von Busse-Grawitz vertretene These, daß “Leukocyten” in der Hornhaut aus kollagenen und elastischen Pasern, aus sog. unterkokkengroßen Übergangsformen stammen, kann nicht bestätigt werden.
    Notes: Summary In a test series with 15 rabbits a so-called central keratitis by means of a redhot needle was set in the left and right eye. The cornea of the left eye was immediately extirpated under sterile conditions and was observed in the tissue culture for 6 days. The corresponding right eye of the first rabbit was left within the animal's body, later it was extirpated after 1/2, 1,1 1/2, 2 hours etc. up to 11 days histologically examined. In the explants following results were obtained. After the lesion is set the puncture site is devoid of epithelium. A double wall of cells lies closely around the crater. One- and-one-half hours later these large cells with more or less variably segmented nuclei demonstrate a strong proliferation. The characteristic nucleus form, the weakly positive naphthol-ASD-chloracetateesterase-reaction and the variable peroxydase-reaction of these cells resemble quite closely leucocytes in phenomenology and ferment-histochemistry. We have therefore chosen the description leucocytoid cells. They are not leucocytes, but cells which originate from basal pluripotent epithelia of the cornea. The so-called central keratitis is not an inflammation in the sense of Marchand, it is rather a regenerative process. The thesis of Busse-Grawitz, that leucocytes in the cornea originate from collagen and elastic fibers or less than coccisized transitional forms, cannot be verified.
    Type of Medium: Electronic Resource
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