Second Procedure

A solution of (NH4)2Sy (100 mL) is added to W3S7Br4 c (2.20 g) and the mixture kept for a week at room temperamre without stirring. A black crystalline solid forms and is filtered off and washed with ethanol (2 x 30 mL) and hot toluene (3 X 30 mL). Yield 2.11 g (90%) of (NH4)2[W3Si6(NH3)3l-H20. 

The complex (NH4)2[W3Si6(NH3)3] H2O (2.00 g) is refluxed in concentrated HCl (40 mL, 11.3 M) for 20-30 min. The solution is filtered while hot and the purple-violet solution in 0.5 M HCl loaded onto a Dowex 50W-X2 cation exchange column (15 x 1.5 cm diameter), washed with 0.5 M HCl (100 mL), and a single purple-violet band eluted with 2 M HCl or Hpts as required. Yield 80-85%. 

W3Se7fir4 -I- 3H3PO2 -I- I2H2O [W3Se4(H20)9] + - - 3H2Se - - 3H3PO3 + 4Br 

The aqua ions [Mo3Q7(H20)6] have been prepared from the compounds 

in Early Transition Metal Clusters with p-Donor Ligands, M. H. Chisholm (Ed.), VCH, New York, 1995, p. 63. 

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This work presents two procedures of quantitative evaluation of the material discontinuities, using the eddy current method. One of the procedures concerns the long surface or subsurface crack-type discontinuities in a flat conductive body. The second procedure allows a quantitative evaluation of short discontinuities, such as voids, inclusions etc. 

It would seem better to transform chemisorption isotherms into corresponding site energy distributions in the manner reviewed in Section XVII-14 than to make choices of analytical convenience regarding the f(Q) function. The second procedure tends to give equations whose fit to data is empirical and deductions from which can be spurious. 

In the second procedure, calcium nitrate was replaced by calcium alkoxide (60). Calcium and sificon alkoxides have very different rates of hydrolysis. To avoid the production of inhomogeneities, a slow and controlled hydrolysis of a mixture of sificon, calcium, and phosphorous alkoxide was performed. The resulting materials were highly homogenous, and monolithic pieces could be produced. The bioactivity of the gel-derived materials is equivalent or greater than melt-derived glasses. 

The second procedure of this type was first described by Yamada et They used the diamidine of malonic acid (175) or cyanace-tamide (176) to prepare l-benzyl-5-amino-u-triazole-4-carboxamide... 

It is more convenient to use the procedure of the first kind for higher drawn fibers (over 350% of elongation) and the second procedure for fibers of smaller drawing. The value of the angle of inclination of the texture depends on the magnitude of the drawing applied. As a result of the investigations of one of the authors... 

In the second procedure a portion of the cold solution is slowly titrated with standard 0.1M hydrochloric acid, using phenolphthalein, or better, the thymol blue-cresol red mixed indicator. This (say, YmL) corresponds to half the carbonate (compare Section 10.32) ... 

Mercury(II) thiocyanate method Discussion. This second procedure for the determination of trace amounts of chloride ion depends upon the displacement of thiocyanate ion from mercury(II) thiocyanate by chloride ion in the presence of iron(III) ion a highly coloured iron(III) thiocyanate complex is formed, and the intensity of its colour is proportional to the original chloride ion concentration ... 

The second procedure is to measure the luminescence intensities at various Ca2+ concentrations and plot log (light intensity) against —log [Ca2+] for each aequorin. Examples of this method are shown in Fig. 4.1.14. This method provides more detailed information on the sensitivity of each aequorin. Generally, an increase in Ca2+ sensitivity shifts the curve to the left. 

SOLUTION We expect the final pressure, P2, to be higher than the initial pressure, Pt, because the volume occupied by the air has been decreased. Follow the second procedure in Toolbox 4.1. Only the pressure and volume change, so all other variables cancel, resulting in Boyle s law. 

The second procedure, several aspects of which are reviewed in this paper, consists of directly computing the asymptotic value by employing newly-developed polymeric techniques which take advantage of the one-dimensional periodicity of these systems. Since the polarizability is either the linear response of the dipole moment to the field or the negative of the second-order term in the perturbation expansion of the energy as a power series in the field, several schemes can be proposed for its evaluation. Section 3 points out that several of these schemes are inconsistent with band theory summarized in Section 2. In Section 4, we present the main points of the polymeric polarization propagator approaches we have developed, and in Section 5, we describe some of their characteristics in applications to prototype systems. 

The numerical model consisted of two alternating procedures During the first one, the creep under applied dead load of a 2-dimensional bar, with an initial small deviation from the straight shape, was simulated the second procedure was the solution to the eigenvalue buckling problem for a bar with a shape developed due to the creep, this approach allowed a prediction of the buckling time with the assumption of the initial imperfection accepted as an unavoidable handicap. 

In the second procedure, organisms with an established degradation potential for TCE were injected at the site. 

The second procedure is different from the previous one in several aspects. First, the metallic substrate employed is Au, which does not show a remarkable dissolution under the experimental conditions chosen, so that no faradaic processes are involved at either the substrate or the tip. Second, the tip is polarized negatively with respect to the surface. Third, the potential bias between the tip and the substrate must be extremely small (e.g., -2 mV) otherwise, no nanocavity formation is observed. Fourth, the potential of the substrate must be in a region where reconstruction of the Au(lll) surface occurs. Thus, when the bias potential is stepped from a significant positive value (typically, 200 mV) to a small negative value and kept there for a period of several seconds, individual pits of about 40 nm result, with a depth of two to four atomic layers. According to the authors, this nanostructuring procedure is initiated by an important electronic (but not mechanical) contact between tip and substrate. As a consequence of this interaction, and stimulated by an enhanced local reconstruction of the surface, some Au atoms are mobilized from the Au surface to the tip, where they are adhered. When the tip is pulled out of the surface, a pit with a mound beside it is left on the surface. The formation of the connecting neck between the tip and surface is similar to the TILMD technique described above but with a different hnal result a hole instead of a cluster on the surface (Chi et al., 2000). 

The dispersion of Pt(0) inside the functionalized resins was carried out by two main routes. The first is based on impregnation of the resin with a mesitylene solution of Pt nanoclusters (Solvated Pt Atoms) obtained via MVS. The second procedure, called Chemical Incorporation and Reduction (CIR), implies the immobilization of convenient molecular Pt precursors (i.e. [Pt(NH3)4]Cl2) in the pre-swollen resins, followed by chemical reduction of the metal center. Among the Pt catalysts obtained by the CIR procedure only Pt/CF3 exhibits a high conversion of the... 

The second procedure is to use a small number of large particles in the beginning of the simulation. The results of that are used as the initial conditions for a simulation with a large number of small particles. Thus, in the final results, the statistical fluctuations are reduced. Also, results from a previous simulation can be used as initial conditions for a new simulation with changed parameters, which saves a large amount of time during parameter scans. 

In the second procedure, we substitute equation (J.3) directly into (J.l) and evaluate the integral over 62... 

The second procedure studied the effects of the sulfur content of the coals during hydrogenation. A suite of unwashed... 

The fact that a set is recursive if (and only if) both it and its complement are recursively enumerable is very important. If we have two procedures, one which always halts and gives a YES when the input is in set R, set but otherwise may not halt and one which always halts and gives a NO answer when the input is not in R but otherwise may not halt, we can put them together and get an algorithm which does one step of the first procedure and then one step of the second procedure in alternation and halts and gives the answer provided by whichever procedure halts first. 

The oxocarbenium perchlorate C(CH20CH2CH2C0+C104 )4 was employed as a tetrafunctional initiator for the synthesis of PTHF 4-arm stars [146]. The living ends were subsequently reacted either with sodium bromoacetate or bromoisobutyryl chloride. The end-capping reaction was not efficient in the first case (lower than 45%). Therefore, the second procedure was the method of choice for the synthesis of the bromoisobutyryl star-shaped macroinitiators. In the presence of CuCl/bpy the ATRP of styrene was initiated in bulk, leading to the formation of (PTHF-fc-PS)4 star-block copolymers. Further addition of MMA provided the (PTHF-fr-PS-fc-PMMA)4 star-block terpolymers. Relatively narrow molecular weight distributions were obtained with this synthetic procedure. 

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