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  • Candida  (1)
  • Keggin anion transformations at silica surface  (1)
  • Key words Trinucleotide repeats  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Catalysis letters 25 (1994), S. 225-240 
    ISSN: 1572-879X
    Keywords: heteropolyacid supported on silica ; methanol oxidation ; Keggin anion transformations at silica surface
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Properties of H5PV2Mo10O40 (HPVMo) heteropolyacid supported on high area silica (375 m2 g−1) were investigated. At low loadings interaction with surface OH groups leads to hydrolysis of Keggin anions into “triads” of edge-sharing octahedra strongly bound to the surface. Characteristic acidity is lost and methanol is oxidized to formaldehyde. At high loading unperturbed Keggin anions are present at the surface. Properties resemble those of unsupported acid. Thermally decomposed Keggin anions become reconstructed under exposure to water vapor. Dimethylether is mainly formed from methanol.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1238
    Keywords: Key words Intensive care unit ; Candida ; Fluconazole ; Amphotericin B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The incidence of systemic Candida infections in patients requiring intensive care has increased substantially in recent years as a result of a combination of factors. More patients with severe underlying disease or immunosuppression from anti-neoplastic or anti-rejection chemotherapy and at risk from fungal infection are now admitted to the ICU. Improvements in supportive medical and surgical care have led to many patients who would previously have died as a result of trauma or disease surviving to receive intensive care. Moreover, some therapeutic interventions used in the ICU, most notably broad-spectrum antibiotics and intravascular catheters, are also associated with increased risks of candidiasis. Systemic Candida infections are associated with a high morbidity and mortality, but remain difficult to diagnose and ICU staff need to be acutely aware of this often insidious pathogen. A number of studies have identified risk factors for systemic Candida infection which may be used to identify those at highest risk. Such patients may be potential candidates for early, presumptive therapy. Here we review the epidemiology, pathogenesis, morbidity and mortality of systemic Candida infections in the ICU setting, and examine predisposing risk factors. Antifungal treatment, including the use of amphotericin B, flucytosine and fluconazole, and the roles of early presumptive therapy and prophylaxis, is also reviewed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 261 (1999), S. 871-882 
    ISSN: 1617-4623
    Keywords: Key words Trinucleotide repeats ; Double-strand break repair ; Gene conversion ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Trinucleotide repeats undergo contractions and expansions in humans, leading in some cases to fatal neurological disorders. The mechanism responsible for these large size variations is unknown, but replication-slippage events are often suggested as a possible source of instability. We constructed a genetic screen that allowed us to detect spontaneous expansions/contractions of a short trinucleotide repeat in yeast. We show that deletion of RAD27, a gene involved in the processing of Okazaki fragments, increases the frequency of contractions tenfold. Repair of a chromosomal double-strand break (DSB) using a trinucleotide repeat-containing template induces rearrangements of the repeat with a frequency 60 times higher than the natural rate of instability of the same repeat. Our data suggest that both gene conversion and single-strand annealing are major sources of trinucleotide repeat rearrangements.
    Type of Medium: Electronic Resource
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