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Corrigan studies

Polyethylene glycols (PEG) have been intensively characterized by thermal analytic methods. The melting points of PEG increase with the molecular weight and decreases with the content of water as a result of eutectic formation. " Corrigan studied the different DSC peaks of PEG Once folded chain crystals and extended chain crystals are present in PEG 6000, which results in two DSC peaks. In PEG of higher molecular mass, only folded chain crystals are present. Lower molecular mass PEG contain only extended chain crystals. Craig reviewed the thermal studies of PEG, including properties in aqueous solutions. " " ... [Pg.3742]

The first IR studies detected the formation and adsorption of CO, and therefore CO was proposed as the poisoning intermediate [Beden et al., 1981 Nichols and Bewick, 1988 Corrigan and Weaver, 1988]. The formation of CO is stmcture-dependent and takes place at open circuit, and the maximum amount accumulated on the electrode... [Pg.184]

In this study, adsorption of acetic acid under voltammetric conditions was observed by a vibrational technique for the first time. The first work in the field was carried out using FTIR (potential difference infrared spectroscopy, PDIRS) and by radioactive labeling [Corrigan et al., 1988]. Both techniques... [Pg.394]

Corrigan DS, Krauskopf EK, RiceLM, Wieckowski A, Weaver MJ. 1988. Adsorption of acetic acid at platinum and gold electrodes— A combined infrared spectroscopic and radiotracer study. J Phys Chem 92 1596-1601. [Pg.404]

An elegant example of the application of in situ FTIR to the study of absorbed species is provided by the work of Corrigan and Weaver (1986). As well as being extremely interesting in terms of the system under study, the work of these authors represents an important step towards the further development of in situ FTIR. If the approach is to attain its full potential, then it must be capable of providing quantitative as well as qualitative information. [Pg.113]

Corrigan and Weaver employed the PDIR approach to study the potential-dependent adsorption of azide, N , at a silver electrode. The potential was switched between the reference value, —0.97 V vs. SCE (where adsorption is known to be limited) and the working potential every 30-60 scans, i.e. up to a minute per step, to a total of c. 1000 scans. The high number of scans was required in order to obtain the required S/N ratio hence the PDIR technique was employed to minimise instrumental drift. Since the electrochemical process under study was totally reversible on the timescale of the experiment, the PDIR technique was a viable option. [Pg.113]

S.E. Barnes, E.C. Brown, N. Corrigan, RD. Coates, E. Harkin-Jones and H.G.M. Edwards, Raman spectroscopic studies of the cure of dicyclopentadiene (DCRD), Spectrochim. Acta, Part A, 61A, 2946-2952 (2005). [Pg.240]

Sonenshine DE, Taylor D, Corrigan G (1985) Studies to Evaluate the Effectiveness of Sex Pheromone-Impregnated Formulations for Control of Populations of the American Dog Tick, Dermacentor variabilis (Say) (Acari Ixodidae). Exp Appl Acarol 1 23... [Pg.457]

The kinetic conclusions of Obolentsev and Gryazev (3,4), of Ballod et al. (5,6), and of Topchieva and Panchenkov (7) are in doubt because of the method of study used, i.e., variation of space velocity at constant pressure. In addition, as will be shown below, the probability is high that either the rates of reaction observed in their studies were diffusion limited or the cumene used by them contained cumene hydroperoxide. In the study of Corrigan et al. (8) the presence of large diffusion effects has already been demonstrated. [Pg.305]

The adsorption of cyanate ions was studied on silver [113, 135] and gold electrodes. A bipolar band can be observed for adsorption on a silver electrode [135] (Fig. 45). Corrigan and Weaver [135] have attempted a deconvolution of this band after observing that the intensity of the positive-going part was lower than expected... [Pg.183]

Pons and co-workers [79] reported the first potentially modulated in-situ FTIR studies of the near-electrode region and they then developed the technique [24, 55, 56, 69] and eventually coined the acronym SNIFTIRS (subtractively normalised interfacial Fourier transform infrared spectroscopy). Corrigan et al. [81-83] and Bockris and co-workers [80, 84-88] have also reported studies employing the technique, or variations on it. These techniques all employ some form of potential modulation regime as with EMIRS, intended to cancel out all those absorptions that do not change with potential (bulk solvent, window, etc.), the spectra are again presented as (AR/R)v vs. v. However, the stepwidths (i.e. the time spent at each potential) in a SNIFTIRS experiment are much longer than those in EMIRS several tens of seconds instead of a tenth of second [89, 90]. [Pg.47]

Corrigan, C. E., and Novakov, T. (1999) Cloud condensation nucleus activity of organic compounds A laboratory study, Atmos. Res. 33, 2661-2668. [Pg.823]

Solozhenko (1988) [176] concluded that kinetic factors influenced the transformation significantly and that the true equilibrium line can only be determined by a thermodynamic approach. From data on heat capacities [177-189], relative enthalpies (heat contents) [190-199], enthalpies of formation data [177, 201-207], equations of state and thermal expansion data for all BN modifications, Solozhenko [176] derived a calculated new phase diagram which significantly differed from the Corrigan and Bimdy (1975) [174] version. An overview of somces of thermodynamic data is given in Table 15. A review of calorimetric studies was given by Gavrichev et al. (1994) [212]. Vaporization studies of boron nitride were made by [208-211]. [Pg.25]

Hiatt, H.H., Barnes, B.A., Brennan, T.A. et al. (1989) A study of medical injury and medical malpractice an overview. New England Journal of Medicine, 321(7), 480-484. Kerr, J.M. (1932) Maternal Mortality and Morbidity, E S Livingstone, Edinburgh. Kohn, L., Corrigan, J. and Donaldson, M.E. (1999) To Err is Human, National Academy Press, Washington DC. [Pg.29]

He found experimentally that conversion was enhahced by an increase in feed rate of the acid or the concentration of the catalyst but decreased by an increase in reflux ratio. He attributed differences between predicted and experimental values to inadequacy of the predicted vapour-liquid equilibrium data. The same system was studied experimentally by Corrigan and Ferris (17) in an Oldershaw sieve-tray column. Batch and continuous experiments... [Pg.393]

How big is the problem of medical error The US Institute of Medicine has estimated that up to 98,000 people die annually as a result of medical error in the USA (Kohn, Corrigan and Donaldson, 2000). This figure has been put at 180,000/ year in other studies. Medical error has been cited as the eighth most coimnon cause of death. According to Zhan and Miller (2003), medical error is one of the 10 most cotmnon causes of death in the USA. The Harvard Medical Practice Study in 1991 found that 4 per cent of hospital patients had additional injuries as a result of medical... [Pg.273]

Corrigan, T. D., Guo, S. H., Szmacinski, H., and Phaneuf, R. J. (2006) Systematic study of the size and spacing dependence of Ag nanoparticle enhanced fluorescence using electron-beam lithography, Appl. Phys. Lett, 88,101112/1-3. [Pg.317]

The presence of iron in nickel oxyhydroxide electrodes has been found to reduce considerably the overpotential for oxygen evolution in alkaline media associated with the iron-free material. An in situ Mossbauer study of a composite Ni-Fe oxyhydroxide was undertaken by Corrigan et al. in order to gain insight into the nature of the species responsible for the electrocatalytic activity.This specific system appeared particularly interesting as it offered a unique opportunity for determining whether redox reactions involving the host lattice sites can alter the structural and/or electronic characteristics of other species present in the material. [Pg.430]


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See also in sourсe #XX -- [ Pg.87 , Pg.89 ]




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