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  • 1
    Electronic Resource
    Electronic Resource
    Titration of Elemental Sulfur with Solutions of Sodium Cyanide (1955)
    s.l. : American Chemical Society
    Analytical chemistry 27 (1955), S. 369-371 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60099a011
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  • 2
    Electronic Resource
    Electronic Resource
    Carbon-isotope constraints on fluid advection during contrasting examples of incipient charnockite formation (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of metamorphic geology 11 (1993), S. 0 
    Details
    ISSN: 1525-1314
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Abstract Incipient charnockite formation within amphibolite facies gneisses is observed in South India and Sri Lanka both as isolated sheets, associated with brittle fracture, and as patches forming interconnected networks. For each mode of formation, closely spaced drilled samples across charnockite/gneiss boundaries have been obtained and δ13C and CO2 abundances determined from fluid inclusions by stepped-heating mass spectrometry.Isolated sheets of charnockite (c.50 mm wide) within biotite–garnet gneiss at Kalanjur (Kerala, South India) have developed on either side of a fracture zone. Phase equilibria indicate low-pressure charnockite formation at pressures of 3.4 ± 1.0 kbar and temperatures of about 700°C (for XH2O= 0.2). Fluid inclusions from the charnockite are characterized by δ13C values of −8% and from the gneiss, 2 m from the charnockite, by values of −15%. The large CO2 abundances and relatively heavy carbon-isotope signature of the charnockite can be traced into the gneiss over a distance of at least 280 mm from the centre of the charnockite, whereas the reaction front has moved only 30 mm. This suggests that fluid advection has driven the carbon-isotope front through the rock more rapidly than the reaction front. The carbon-front/reaction-front separation at Kalanjur is significantly larger than the value determined from a graphite-bearing incipient charnockite nearby, consistent with the predictions of one-dimensional advection models.Incipient charnockites from Kurunegala (Sri Lanka) have developed as a patchy network within hornblende–biotite gneiss. CO2 abundances rise to a peak near one limb of the charnockite, and isotopic values vary from δ13C of c.−5.5% in the gneiss to −9.5% in the charnockite. The shift to lighter values in the charnockite can be ascribed to the formation of a CO2-saturated partial melt in response to influx of an isotopically light carbonic fluid.Thus, incipient charnockites from the high-grade terranes of South India and Sri Lanka reflect a range of mechanisms. At shallower structural levels non-pervasive CO2 influxed along zones of brittle fracture, possibly associated with the intrusion of charnockitic dykes. At deeper levels, in situ melting occurred under conditions of ductile deformation, leading to the development of patchy charnockites.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1525-1314.1993.tb00193.x
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamic fluorescence Stokes shift of an acetylene-bridged donor–acceptor compound in alcohols at low temperatures (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 6456-6462 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The time-dependent fluorescence Stokes shift of p,p'-cyano thiomethyl diphenylacetylene in three different alcohols (1-propanol, 1-butanol, and 1-octanol) at room temperature was measured using time-correlated single photon counting and the spectral reconstruction method. These measurements were also performed with the probe in 1-propanol at low temperatures. The observed behavior is consistent with the dynamics of solvation of a polar excited state. As expected, the average solvation time increases with decreasing temperature and is correlated with solvent bulk viscosity down to 180 K. Apparent deviations observed at lower temperatures are attributed to the finite emission lifetime (≈1 ns) of the probe. A significant fast component (〈100 ps) is observed in the dynamic Stokes shift even at temperatures close to the freezing point of 1-propanol. Different mechanisms that could result in such a fast component are discussed. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.469360
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  • 4
    Electronic Resource
    Electronic Resource
    Models for Pathogenesis of Mycobacterium avium (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 797 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb52969.x
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  • 5
    Electronic Resource
    Electronic Resource
    In Vitro Models to Study Attachment and Invasion of Helicobacter pylori (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 797 (1996), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1996.tb52983.x
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  • 6
    Electronic Resource
    Electronic Resource
    Intrapituitary fluid levels following haemorrhage: MRI appearances in 13 cases (1999)
    Springer
    Neuroradiology 41 (1999), S. 167-170 
    Details
    ISSN: 1432-1920
    Keywords: Key words Pituitary haemorrhage ; Fluid levels ; Magnet resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Demonstration of fluid levels on MRI is well recognised in cerebral haematomas, tumours and cysts. The occurrence of fluid levels within haemorrhagic pituitary tumours has not previously been described in detail. Evidence of haemorrhage was identified in 27 of 125 pituitary tumours. Fluid levels occurred in 13 of these haemorrhagic tumours. No association with histological type was identified. Recognised risk factors for haemorrhage were identified in half of the cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002340050725
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  • 7
    Electronic Resource
    Electronic Resource
    Use of an extension-assisting brace following anterior cruciate ligament reconstruction (1997)
    Springer
    Knee surgery, sports traumatology, arthroscopy 5 (1997), S. 6-9 
    Details
    ISSN: 1433-7347
    Keywords: Key words Anterior cruciate ; ligament reconstruction ; Extension ; deficit ; Extension-assisting brace
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Sports Science
    Notes: Abstract Despite changes in rehabilitation protocols, an extension deficit remains an important potential cause of significant morbidity following anterior cruciate ligament (ACL) reconstruction. An extension-assisting brace was designed using a limited motion brace and an elastic strap across a fulcrum on the anterior aspect of the knee joint. The effects of the brace were investigated in 40 patients undergoing primary ACL reconstruction using an autogenous central third patellar tendon graft. The patients were randomized either to use the brace in the first 6 weeks postoperatively or to undertake the same accelerated rehabilitation programme but without any brace, and they were reviewed at 4 months postoperatively. The following data were recorded: passive and active extension and flexion deficits compared with the non-operated limb, KT-1000 assessment of anterior laxity and isometric quadriceps and hamstring strength. There was no difference between the two groups for any of the recorded variables. This was largely attributed to satisfactory tunnel placement and emphasis on the restoration of extension and quadriceps function during the early postoperative rehabilitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001670050016
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  • 8
    Electronic Resource
    Electronic Resource
    Rapid identification of Clostridium botulinum colonies by in vitro toxicity and antimicrobial susceptibility testing (1994)
    Springer
    World journal of microbiology and biotechnology 10 (1994), S. 27-29 
    Details
    ISSN: 1573-0972
    Keywords: Clostridium botulinum ; identification ; immunoassay ; resistance ; toxigenicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Identification of Clostridium botulinum is usually based on toxin detection of broth culture by mouse bioassay and requires 7 to 10 days to complete. Here, we describe an alternative in vitro procedure for direct identification of C. botulinum (types A and B) colonies which can be completed in 48 h. The method is based on toxigenicity of colonies demonstrable by enzyme immunoassay and resistance of C. botulinum to antimicrobial agents, sulpha-methoxazole, trimethoprim and cycloserine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00357557
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  • 9
    Electronic Resource
    Electronic Resource
    Formation and gelation of titania nanoparticles from AOT reverse micelles (1997)
    Springer
    Journal of sol gel science and technology 8 (1997), S. 65-69 
    Details
    ISSN: 1573-4846
    Keywords: nanocrystalline titania powder ; microemulsions ; reverse micelles ; AOT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Titania nanoparticles have been produced by the controlled hydrolysis of tetraisopropyltitanate (TPT) in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelles. Particle formation and aggregation were investigated by static and dynamic light scattering and the chemical species by vibrational spectroscopy. The kinetics of particle formation and aggregation were controlled by varying [H2O]/[AOT] (w 0), [H2O]/[Ti(IV)] and [AOT]/[Ti(IV)]. Nanoparticles, with diameters〈10 nm, could be produced at relatively high Ti(IV) concentrations (up to 0.05 M). These nanoparticles aggregated into sols, with colloid sizes of 20 to 200 nm, eventually forming gelatinous precipitates. Different titania phases were produced, depending on the size of the micellar water pool; small pools (w 0〈6) yielded amorphous particles, while larger pools (w 0〉10) produced anatase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02436819
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  • 10
    Electronic Resource
    Electronic Resource
    Kinetics of colloid formation during the preparation of sol-gel zirconia (1994)
    Springer
    Journal of sol gel science and technology 2 (1994), S. 215-220 
    Details
    ISSN: 1573-4846
    Keywords: zirconia ; hydrolysis kinetics ; precursor chemistry ; zirconium alkoxides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The formation of zirconia colloids by hydrolysing zirconium n-propoxide in n-propanol has been investigated by simultaneous, multi-angle static and dynamic light scattering, and vibrational spectroscopy, as a function of reactant concentration, water-to-alkoxide mole ratio and temperature. The overall hydrolysis/condensation reaction followed pseudo 2nd-order kinetics at 303 K, with an induction period of 〈1 to 24 hours. The induction period could be substantially reduced by increasing the temperature to 348 K. For hydrolysis with 3.6 moles of water per mole of alkoxide, the apparent activation energy was 24 kJ mol−1. Such a low activation energy implies that hydrolysis occurs readily over the temperature range investigated (303–348 K). During the induction period, processing with stoichiometric, or excess, water produced “oxy-hydroxides”, while “hydrated oxides” formed under water-deficient conditions. The hydrolysis reactions yielded zirconia colloids with equivalent spherical, z-averaged diameters of 〈200 nm. The colloids exhibited fractal dimensions of 3.0, with a low size-polydispersity, inferring the formation of dense, monodispersed spherical particles. SEM observations confirmed these results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486244
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