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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism 231 (1971), S. 15-22 
    ISSN: 0005-2760
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    BBA - Enzymology 302 (1973), S. 293-304 
    ISSN: 0005-2744
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 28 (1989), S. 2891-2895 
    ISSN: 0031-9422
    Keywords: Cyanidium caldarium ; Cyanophyceae ; amino acid pools ; glutamate variation. ; glutamine variation ; unicellular algae
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 31 (1992), S. 1911-1916 
    ISSN: 0031-9422
    Keywords: Cyanidium caldarium ; Rhodophyta ; amino acid biosynthesis, amino acid pools ; ammonium assimilation ; nitrogen limitation ; nutrient stress. ; phosphate limitation ; potassium limitation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 20 (1964), S. 643-644 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto L'introduzione nella cavità midollare dello sterno di soggetti affetti da morbo di Cooley di ARN II° estratto dalle cellule emopoiteiche normali, provoca un netto aumento della quota di HbA nelle cellule della serie eritroblastica.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 20 (1964), S. 69-70 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto Vengono descritte le modificazioni morfologiche, rilevate al microscopio elettronico, delle cellule reticolari leucemiche coltivate in presenza di ARN estratto dalla milza di embrioni di vitello.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 22 (1966), S. 603-604 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Riassunto L'iniezione ad animali normali di ARN estratto dalla milza di animali immunizzati con antigene ‘H’ diS. typhi, provoca la comparsa, nel siero degli animali riceventi, di anticorpi diretti contro tale antigene.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 203 (1964), S. 1078-1079 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cells of as cites tumor of mice have been incubated with RNA from a normal liver. An impressive reduction was noted in the capacity of these cells to reproduce the original tumor when grafted on to the tissue of other animals. This loss of malignity was due not to the death or diminished vitality ...
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1439-0973
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Seit 1984, als das erste Fluorchinolon, Norfloxacin, auf dem europäischen Markt eingeführt wurde, hat der Verbrauch an Substanzen dieser Stoffklasse in erheblichem Umfang zugenommen. Um den Einfluß dieses Verbrauchs auf die Ausbreitung der Resistenz gegenüber Fluorchinolonen bei klinischen Isolaten der Familie Enterobacteriaceae,Pseudomonas aeruginosa, Staphylococcus aureus, Koagulase-negativen Staphylokokken undEnterococcus faecalis feststellen zu können, haben wir die Empfindlichkeitsdaten von vier multizentrischen Studien analysiert, die zwischen 1983 und 1990 von der Arbeitsgemeinschaft „Resistenz“ in der Paul-Ehrlich-Gesellschaft für Chemotherapie durchgeführt wurden. Alle an der Studie beteiligten Institute verwendeten die gleichen standardisierten Methoden. Die minimalen Hemmkonzentrationen wurden unter Verwendung der Mikro-Bouillondilutionsmethode ermittelt. Es wurden mehr als 20 000 Bakterienstämme untersucht. Die Ergebnisse wurden für Ciprofloxacin dargestellt, das als repräsentatives Fluorchinolon angesehen wird. Wenn für Ciprofloxacin ein Grenzwert von ≥ 4 mg/l für die Bewertung resistent benutzt wird, blieb in Mitteleuropa die Prävalenz resistenter Stämme der FamilieEnterobacteriaceae zwischen 1983 und 1990 unterhalb von 1%. Demgegenüber betragen die Resistenzraten in 1983, 1986, 1989 und 1990 fürP. aeruginosa 0,7%, 1,0%, 3,8% and 7,0%, fürS. aureus 0%, 0,5%, 6,6% und 6,8% sowie fürE. faecalis 2,2%, 0,7%, 4,9% und 7,7%. Die 1990 in Kooperation mit 78 Laboratorien in 12 europäischen Ländern durchgeführte Studie ergab, daß hinsichtlich des Ausmaßes der Fluorchinolonresistenz zwischen den einzelnen Spezies erhebliche Unterschiede bestehen können. So beträgt die Resistenzhäufigkeit beiProteus vulgaris undSalmonella sp. 0%, aber beiProvidencia stuartii 26,7%. Die höchsten Resistenzraten wurden für oxacillinresistente Stämme vonS. aureus (70,6%) und Oxacillin-resistente Koagulase-negative Staphylokokken (51,2%) bestimmt. Das Resistenzniveau der einzelnen Bakterienspezies variiert zwischen den Ländern, wobei der Anteil resistenter Stämme in Südeuropa stets höher war als in Nordwest- und Mitteleuropa. Resistente Stämme vonS. aureus undE. faecalis wurden häufiger von Intensivpatienten als Patienten auf Normalstationen isoliert. Darüber hinaus zeigte sich fürS. aureus ein erheblicher Unterschied zwischen den Resistenzraten für Blut- (9,3%) und Urinisolate (34,4%).
    Notes: Summary Since 1984, when the first fluoroquinolone, norfloxacin, was marketed in Europe, there has been a marked increase in the usage of this class of drugs. In order to evaluate the influence of this drug usage on the prevalence of resistance to fluoroquinolones in clinical isolates of the familyEnterobacteriaceae, Pseudomonas aeruginosa, Staphylococcus aureus, coagulase-negative staphylococci andEnterococcus faecalis we reviewed the susceptibility data from four collaborative surveys conducted between 1983 and 1990 by the Study Group ‘Bacterial Resistance’ of the Paul-Ehrlich-Society for Chemotherapy. All participating laboratories used the same standardized methods. Miminal inhibitory concentrations were determined by the broth microdilution method. More than 20,000 bacterial strains were tested. The results are presented for ciprofloxacin, which is regarded as the representative of the fluoroquinolones. Using ≥ 4 mg/l as a breakpoint for resistance to ciprofloxacin, the prevalence of resistant strains of the familyEnterobacteriaceae in Central Europe between 1983 and 1990 remained below 1%. In contrast, the resistance rates inP. aeruginosa were 0.7%, 1.0%, 3.8% and 7.0%, inS. aureus 0%, 0.5%, 6.6% and 6.8%, and inE. faecalis 2.2%, 0.7%, 4.9% and 7.7% in 1983, 1986, 1989 and 1990, respectively. The latest study carried out in cooperation with 78 laboratories from 12 European countries revealed great differences in the prevalence of resistance to fluoroquinolones from one species to another ranging from 0% withProteus vulgaris andSalmonella spp. to 26.7% withProvidencia stuartii. The highest rates of resistance were recorded for oxacillin-resistant strains ofS. aureus (70.6%) and oxacillin-resistant coagulase-negative staphylococci (51.2%). Resistance levels for individual species varied between countries, but they were consistently higher in Southern Europe than in Northwest and Central Europe. Resistance inS. aureus andE. faecalis was more prevalent in isolates from intensive care patients than in isolates from patients on normal wards. In addition,S. aureus isolates displayed a considerable difference in the resistance rates for blood (9.3%) and urine (34.4%).
    Type of Medium: Electronic Resource
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