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  • 1985-1989  (3)
  • Alpha-1-microglobulin  (1)
  • Ceratodon  (1)
  • 25.70.Np
  • Inorganic Chemistry
  • Phytochrome (as inductor)
  • 1
    Electronic Resource
    Electronic Resource
    Alpha-1-Mikroglobulin in Urin und Serum bei Proteinurie und Niereninsuffizienz (1985)
    Springer
    Journal of molecular medicine 63 (1985), S. 711-717 
    Details
    ISSN: 1432-1440
    Keywords: Alpha-1-microglobulin ; Beta-2-microglobulin ; Proteinuria ; Renal insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Alpha-1-microglobulin (alpha-1-m) is a low molecular weight glycoprotein (mw 25–33 KD) that is filtered through the glomeruli and reabsorbed in the proximal parts of the renal tubules where it is catabolized. Normal ranges were established for alpha-1-m (100 healthy controls) in serum (20–42 mg/l) and urine (3.5–8 mg/l). Alpha-1-m was then measured in 341 urine samples whose protein pattern had been classified as “pathologic” and “normal” according to microelectrophoresis. Increased alpha-1-m concentrations were found in 266 out of 280 pathologic urines (5% false negative) and in 3 out of 61 normal urines (4% false positive). Beta-2-microglobulin (beta-2-m), total protein or protein test strips showed a poorer correlation to the electrophoretic results. Measurement of alpha-1-m is, therefore, the most sensitive of these methods for the detection of proteinuria. In 90 patients with low molecular weight proteinuria and either with or without renal insufficiency alpha-1-m concentrations were determined in both urine and serum. While all patients had elevated urinary alpha-1-m concentrations, increased serum values were only found in renal insufficiency (Ccrea〈100 ml/min). Independently of these results, we were also able to establish that increased alpha-1-m levels are found at decreased glomerular filtration rates (Ccrea 〈70 ml/min). Pathologic alpha-1-m concentrations therefore only allow the conclusion of isolated tubular impairment when the GFR is greater than 70 ml/min. Data from 350 patients with various renal and hypertensive diseases showed that serum alpha-1-m is a more sensitive indicator of renal insufficiency, even in the so-called “creatinine blind” range (60–100 ml/min) of the GFR than either creatinine or beta-2-m.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01733115
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Storage of the phytochrome-mediated phototropic stimulus of moss protonemal tip cells (1988)
    Springer
    Planta 175 (1988), S. 39-49 
    Details
    ISSN: 1432-2048
    Keywords: Calcium (chlorotetrcycline fluorescence) ; Ceratodon ; Monensin ; Phototropism (moss) ; Phytochrome (moss) ; Protonema (moss) ; Tip growth (moss protonema)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A phytochrome-regulated phototropic response of the moss Ceratodon purpureus was investigated. Chlorotetracycline (CTC) was used to visualize membrane-associated calcium gradients in the tip cell of moss caulonemal filaments. A tip-to-base Ca2+ gradient was observed. The ionophore monensin rapidly inhibited the growth of the tip cell and abolished the CTC fluorescence. Six hours after transferring to inhibitor-free medium, protonemal growth resumed and reached the normal growth rate within 12 h. The growth was accompanied by a reappearance of the CTC-fluorescence gradient. Unilateral irradiation given during the monensin treatment or after the treatment during the period when growth inhibition persisted led, with the re-initiation of growth, to a typical positive phototropic bending in complete darkness. Far-red light applied just before the growth response started, or during growth inhibition, abolished the phototropic response. The phytochrome-mediated signal was qualitatively (position) and quantitatively (degree of bending) memorized. Signal perception and response could be separated temporally. This result indicates that at least under some circumstances, e.g. under the influence of monensin, the phytochrome-mediated signal can be stored for several hours in darkness. Calcium seems to be essential for the processing of polar growth only. A specific function (second messenger) in phytochrome-dependent signal transduction could not be confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00402880
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Untersuchungen an oxidischen Katalysatoren. XLIV. Beeinflussung des katalytischen Verhaltens modifizierter Zeolithe vom Typ ZSM-5 durch thermische BehandlungProfessor Wolfgang Wieker zum 60. Geburtstage am 19. April 1987 gewidmet (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 547 (1987), S. 142-148 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Oxide Catalysts. XLIV. Modification of the Catalytic Behavior of Modified ZSM-5 Zeolites by Thermal TreatmentThe catalytic activity, the shape selectivity, and the deactivation behavior of ZSM-5 in paraffin cracking reactions can be regulated by a thermal pretreatment. A minimum of the deactivation rate as a function of zeolite pretreatment time at 600°C found in the hexane cracking could be verified in the methanol conversion reaction to gasoline.
    Notes: Die katalytische Aktivität, die Formselektivität und das Aktivität-Zeit-Verhalten des ZSM-5 beim Spalten von Paraffinen kann durch thermische Vorbehandlung stark beeinflußt werden. Ein in der Spaltung von Hexan gefundenes Minimum der Desaktivierungsgeschwindigkeit als Funktion der Dauer der Vorbehandlung bei 600°C konnte in der Methanolumwandlung zu Benzin verifiziert werden.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875470416
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    Paper (German National Licenses)
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