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  • Chemistry  (2)
  • Antibiotic resistance  (1)
  • 1
    ISSN: 1432-1238
    Keywords: Intensive care units ; Streptococcus ; Antibiotics ; Antibiotic resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective The effect of selective decontamination of the digestive tract (SDD) on Intensive Therapy Unit (ITU)-acquired enterococcal infection and colonization was studied. Changes in the predominant species isolated and resistance patterns to antimicrobial agents were also studied. Design Three groups were investigated: historical control (HC), contemporaneous control (CC) and patients receiving SDD (topical polymyxin, amphoterecin B and tobramycin throughout ITU stay with intravenous ceftazidime for the first 3 days only). Setting Adult general ITU with 7 beds. Patients Patients with a nasogastric tube in situ and who were likely to remain in ITU for 48 h or longer were recruited. Results Enterococcal infections occured in 3 of 84 HC patients and 2 of 91 CC patients. There were no unit-acquired enterococcal infections in the SDD group. There were 140 episodes of enterococcal colonization occurring in 112 patients, with significantly more in the SDD and CC groups (p〈0.05. There were no significant differences in antibiotic sensitivities between the three groups.Enterococcus faecalis was the most frequently isolated species. Conclusion SDD does not predispose to enterococcal infection but does encourage colonization in patients receiving the regimen and other patients in ITU at the same. There is a complex interaction of factors which influence faecal flora and the likelihood of patients becoming colonized or infected with enterococci.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 61 (1996), S. 1649-1654 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The kinetics of polycondensation of hydroxyfunctional polydimethylsiloxane has been studied with a simple new inexpensive piece of equipment, i.e., the vibrating needle curemeter. The order of reaction with respect to crosslinker and catalyst concentration has been determined to be unity and 0.24, respectively. The activation energy of the reaction has been found to be zero. © 1996 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-2313
    Keywords: Mono-, di-, and trinuclear tantalum and tantalum | niobium complexes with P4 and P2 ligands ; m̈-η2:1:1-P2 coordination mode ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Niobium and Tantalum Complexes with P2 and P4 LigandsThe photolysis of [Cp″Ta(CO)4] 1 (Cp″ = C5H3tBu2-1,3) and P4 affords Cp″(CO)2Ta(η4-P4) 2, [{Cp″(CO)Ta}2(m̈-η2:2-P2)2] 3 and [Cp3″(CO)3Ta3(P2)2] 4. In a photochemical reaction 2 and [Cp*Nb(CO)4] 5 form [{Cp*(CO)Nb}{Cp″(CO)Ta}(m̈-η2:2-P2)2] 6 and [{Cp*(CO)2Nb} {Cp*Nb}{Cp″(CO)Ta}(m̈3-η2:1:1-P2)2] 7, a compound with the novel m̈3-η2:2:1-P2-coordination mode. The reaction of 2 and [Cp*Co(C2H4)2] 8 leads to [{Cp*Co} {Cp″(CO)Ta}(m̈-η2:2-P2)2] 9, a heteronuclear complex with an „early“ and a „late“ transition metal. Complexes 2, 3, 7 and 9 have been further characterized by X-ray structure analyses.
    Notes: Die Photolyse von [Cp″Ta(CO)4] 1 (Cp″ = C5H3tBu2-1,3) und P4 ergibt [Cp″(CO)2Ta(η4-P4)] 2, [{Cp″(CO)Ta}2(μ-η2:2-P2)2] 3 und [Cp3″(CO)3Ta3(P2)2] 4. 2 reagiert photochemisch mit [Cp*Nb(CO)4] 5 zu [{Cp*(CO)Nb}{Cp″(CO)Ta}(m̈-η2:2-P2)2] 6 und [{Cp*(CO)2Nb}{Cp*Nb} {Cp″(CO)Ta}(m̈3-η2:1:1-P2)2] 7, einer Verbindung mit der neuen m̈3-η2:2:1-P2-Koordinationsvariante. Die Reaktion von 2 und [Cp*Co(C2H4)2] 8 führt zum heteronuklearen Komplex [{Cp*Co} {Cp″(CO)Ta}(m̈-η2:2-P2)2] 9 mit einem „frühen“ und „späten“ Übergangsmetall. Die Komplexe 2, 3, 7 und 9 wurden zusätzlich durch eine Röntgenstrukturanalyse charakterisiert.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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