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Analysis of LIS Data

1 Analysis of LIS data. - Most lanthanide ions possess larger magnetic [Pg.562]

Ren et have discussed the analysis of LIS data. In complexes with a 3-fold or higher rotational symmetry, the LIS, Aa,i, can be expressed as a sum of contact and pseudocontact terms  [Pg.563]

To remove questionable assumptions from the analysis, these authors propose a method that provides ratios of structural factors rather than absolute values. Building on this work, Geraldes et have developed methods involving chemical shift data for two and three nuclear spins and have applyied these methods to complexes with a 4-fold symmetry axis. In further work °, the same group has used a combination of 1-, 2- and 3-nucleus methods in the analysis of LIS data for complexes with a C3 rotation axis. [Pg.563]

Oali et have developed new multi-center methods for analysing LIS data that are appropriate when the paramagnetic complex contains more the one lanthanide ion. Their specific chemical focus involves the solution structures of triple-stranded homotrimetallic lanthanide helicates, [Ln3(lig)3], (Ln = Ce-Yb, except Pm, Gd). The multi-center approach incorporates different crystal field parameters for the center and terminal lanthanide ions. In the same study, the authors developed and applied a novel 3-nucleus crystal field-independent method of analysis, which they used to demonstrate that all members of the [Pg.563]

DiBari et describe a new program, PERSEUS, for solution structures derived from LIS and lanthanide-induced NMR relaxation data. [Pg.564]


A thorough analysis of LIS data indicates the presence of a common struc-... [Pg.34]

A non-linear regression analysis of the data listed in the table is made by Li [211]. By comparison between the regression coefficients the following are concluded (1) The pH has the most significant effect on the mean size, the influence of the TiCI4 concentration takes second place, while the temperature has little effect and (2) Similarly, the pH and the TiCl4 concentration exhibit the most significant influences on the yield of titanium. [Pg.313]

Li J, Heath IB The phylogenetic relationships of the anaerobic chytridiomycetous gut fungi (Neocallimasticaceae) and the Chytridiomycota. II. Cladistic analysis of structural data and description of the Neocallimasticales ord. nov. Can J Bot 1993 71 393 07. [Pg.282]

Kinetic experiments were carried out by measuring the formation of ADP and GDP with a coupled assay as previously described (Agarwal et al., 1978 Li et al., 1996). Kinetic parameters were obtained by nonlinear least square analysis of the data according to Cleland (1986). [Pg.680]

The main differences between the models lies in whether or not some fraction of the catalyst is in direct contact with the bubble gas, and in the extent of axial mixing in each phase. Properties of various models have been discussed extensively by Gilliland and Knudsen (G7) in relation to the extent of reaction in experimental fluidized bed reactors, considering that allowance for direct contact between bubble gas and a certain amount of catalyst in it is the sole way to account for the contact efficiency. Unless a fraction of the catalyst particles is assumed to be entrained in the bubble gas, the bubble size calculated to fit the reaction data is found to decrease with increasing catalyst activity at otherwise identical fluidization conditions, in which the bubble size should remain constant. Essentially the same decrease in bubble size was observed by Miyauchi and Morooka (M29) in their analysis of the data by Lewis et al. (LI 2), and by Furusaki (F14) in his fluidized bed data for the Deacon reaction. [Pg.383]

The conductivities of MCIO4 (M = Na, K, Rb, or Cs) in ethylene glycol have been determined and the temperature coefficients of their mobilities estimated the analysis of the data shows that the ions are strongly solvated. Observations noted in studies of the viscosities of solutions of MI (M = Li, Na, K, Rb, or Cs) in DMSO also indicate that solvation of M is important in this solvent. ... [Pg.10]

Figure 3 shows the total load dependence of the friction force measured for modulation amplitudes of 50nm and lOOnm. The contact location was arbitrarily chosen on the same surface. Both curves are described by the same Amontons law. The friction coefficient defined by the slope of the linear fit is )li=0.087 0.001. When plotted as the friction force versus the total load, the intercept is zero. It is important at this point to specify that the error associated to the friction coefficient arises from the fitting analysis of our data, which therefore, determines the precision of the experiment and not the overall acuracy of the experiment. Indeed, the main source of uncertainty in our measurements originates in the precision in the cantilever metrics measured by optical microscopy and SEM which is of the order of 3% to 5%. Some other sources (19,28), like the position of the laser spot on the backside of the cantilever affects the absolute accuracy of the friction measurements to an extend that is difficult to evaluate. We expect the overall accuracy on the friction measurement to be less than 60%(25). Nevertheless, since the crucial experimental conditions were optimized and kept constant from an experiment to the other, the comparison remains valid. [Pg.148]

Human reliability [lata NJUREG/CR-1278 was supplemented by judgment of system analysts and plant personnel. Human error probabilities were developed from NUREG/CR-12 8, human action time windows from system analysis and some recovery limes from analysis of plant specific experience. Data sources were WASH-1400 HEPs,Fullwood and Gilbert assessment ot I S power reactor Bxp., NUREG/ CR -127K. and selected acro ptice li.it.j... [Pg.182]

The hypothesis on the earlier transition from laminar to turbulent flow in micro-tubes is based on analysis of the dependence of pressure gradient on Reynolds number. As shown by the experimental data by Mala and Li (1999), this dependence may be approximated by three power functions AP Re (Re < 600),... [Pg.115]


See other pages where Analysis of LIS Data is mentioned: [Pg.380]    [Pg.380]    [Pg.64]    [Pg.380]    [Pg.380]    [Pg.64]    [Pg.187]    [Pg.967]    [Pg.190]    [Pg.44]    [Pg.968]    [Pg.66]    [Pg.84]    [Pg.229]    [Pg.231]    [Pg.279]    [Pg.247]    [Pg.136]    [Pg.292]    [Pg.203]    [Pg.120]    [Pg.232]    [Pg.598]    [Pg.94]    [Pg.226]    [Pg.228]    [Pg.276]    [Pg.521]    [Pg.12]    [Pg.386]    [Pg.156]    [Pg.1021]    [Pg.507]    [Pg.135]    [Pg.34]    [Pg.35]    [Pg.65]    [Pg.306]    [Pg.308]    [Pg.122]    [Pg.103]   


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