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  • 1
    Digitale Medien
    Digitale Medien
    Nitrogen availability of soluble and slow release nitrogen fertilizers as assessed by electroultrafiltration (1993)
    Springer
    Nutrient cycling in agroecosystems 34 (1993), S. 121-126 
    Details
    ISSN: 1573-0867
    Schlagwort(e): Controlled release fertilizers ; electroultrafiltration ; nitrogen ; ryegrass
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Abstract The efficiency of different nitrogenous fertilizers under forced leaching conditions was determined in pot experiments using ryegrass as an indicator plant in a sandy loam soil. Treatments were: ON (unfertilized), AN (ammonium nitrate), U (urea), DAP (diammonium phosphate), T (Triabon), FK (Floranid Komplett) and CDU (crotonylidendiurea). N source effects on N uptake, and N leached (as % of N applied) were evaluated. Results show that the fertilizers which behaved best with regard to N uptake were FK followed by Triabon and AN. The most soluble fertilizers, AN and urea, gave the highest N leaching losses. Significant correlations between EUF-NI (rapidly soluble fraction) and leaching, as well as between EUF-N (I + II) and N uptake by the plant (where EUF-N II relates to the slowly soluble fraction) were obtained.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00750106
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Aspergillosis of the sphenoid sinus simulating a pituitary tumor (1989)
    Springer
    Neuroradiology 31 (1989), S. 362-363 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Aspergillosis ; Pituitary abscess ; Trans-sphenoidal surgery
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Sphenoidal aspergillosis is an unusual cause of sella turcica enlargement. Pituitary abscess secondary to Aspergillus had been reported. In the present case, a woman with sphenoid sinus aspergillosis mimicked a pituitary tumor. This patient survived her infection with intact pituitary function following a transsphenoidal approach. No postoperative amphotericine-B and 5-fluorocytosine were necessary. CT scan revealed a mass occupying the sphenoid sinus extending to the sella turcica. Factors that should alert the clinican to the presence of a sphenoidal and pituitary abscess in a patient with sella turcica enlargement are prior episodes of sinusitis, meningitis and immunosuppression and, as in the present case, hyperglycemia.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00344187
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  • 3
    Digitale Medien
    Digitale Medien
    Altered development of polysomal RNA activity in chick-pea (Cicer arietinum L.) embryonic axes. Effects of abscisic acid and temperature (1985)
    Springer
    Planta 164 (1985), S. 517-523 
    Details
    ISSN: 1432-2048
    Schlagwort(e): Abscisic acid and RNA translation ; Cicer ; Embryonic axis ; Germination and temperature (seeds) ; Poly (A)RNA ; Protein synthesis ; Temperature and RNA translation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The in vitro activity of polysomal polyadenylated RNA (poly(A)RNA) was studied using chick-pea (Cicer arietinum L.) embryonic axes subjected to treatments retarding germination (H2O 30°C and abscisic acid [ABA] 30°C) or inducing a false germination (thiourea 30°C) in which normal protein synthesis and growth did not occur. All treatments induced a smaller proportion of poly(A)RNA compared with the control (H2O 25°C). However, poly(A)RNA obtained in the presence of ABA had a similar in vitro activity to that of the control. The translation of mRNA from embryonic axes germinated at high temperatures was extensively blocked (70%) by methyl-7-guanosine-5′-triphosphate, whereas mRNA translation from axes treated with H2O-25°C and ABA was completely blocked (100%), indicating a greater cap dependence in the latter cases. Polyacrylamide gel electrophoresis showed that ABA and H2O-30°C each induced the synthesis of a polypeptide with an approximate Mr of 32 kDa, probably a germination regulator. It is suggested that ABA and high temperatures could regulate germination at the translational level as well as affecting ionic-exchange properties, as has been previously demonstrated (Hernández-Nistal et al. 1983, Physiol. Plant. 57, 273–278).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00395969
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