Comparison sharp variation

Productivity of green mass of wild clover samples Gomaya Saniba and Dargavs-ki is lower in comparison with introduced cultivars, but they have higher percent of seed number in inflorescences, which is an adaptive reaction to sharp variation of meteo-climatic factors in the highlands. 

The plateau values indicate clearly the existence of bulk phases between the interfaces. This is confirmed by the comparison with the densities of the pure liquids (see Tables II and III). Each of these profiles exhibits a sharp variation in a limited range of Z. A thickness of the interface can be defined as the size pf the region on which one profile does not remain constant. The analysis of the two profiles yields two comparable values. The estimated thickness is equal to 10 2 A, whereas the atomic... 

Figure 6.13 shows a comparison of these models, which in fact can be divided in two groups 1. models predicting a sharp variation of fhe relative... 

The study is performed at reduced temperature T = 0.75 and reduced density p = 0.844-0.92. This is precisely the system studied in computer simulations [102]. The variation of the self-diffusion coefficient with the solute size is shown in Fig. 8, where the size of the solute molecule has been varied from 1 to 1/20 times that of the solvent molecule. In the same figure the computer-simulated values [102] are also plotted for comparison with the calculated results. The calculated results are in good agreement with the computer simulations. Both the theoretical results and the computer simulation studies show an enhanced diffusion for size ratios TZ TZ = 01/02) between 1.5 and 15. This is due to the sharp decoupling of the solute dynamics from the solvent density mode. 

The presence of 1 equivalent of TPP1 OTf- with the chromium anion TpCr(CO)3- as the tetrabutylammonium salt in dichloromethane results in the loss of the carbonyl bands of the anion at 1890 and 1740 cm-1. Their complete replacement by the sharps, band at 2018 cm-1 and the broad E band (1898 and 1838 cm-1) of the 17-electron radical TpCr(CO)3- indicates that the ion-pair annihilation proceeds to completion. Variation of the pyrylium cation, by the replacement of TPP+ with a weaker acceptor such as tri-p-anisylpyrylium triflate (TAP+ OTf-), consistently results in lower conversions of the carbonylmetal anions. For example, the treatment of TpMo(CO)3 with the TAP+ salt leads to a light red solution of TAP (Am 560 nm) (92) and a greatly diminished concentration of TpMo(CO)3- as judged by the reduced carbonyl absorbances in comparison with that obtained from TPP+ at the same concentration. Even with this weaker acceptor cation, however, the strong chromium anionic donor TpCr(CO)3- is completely oxidized by 1 equivalent of TAP+ to form TpCr(CO)3- in essentially quantitative yields. 

Synchrotron-radiation and x-ray photoemission studies of the valence states of condensed phase-pure Cm showed seventeen distinct molecular features extending 23 cV below the highest occupied molecular states with intensity variations due to matrix-element effects involving both cluster and free-electron-like final states. Pseudopotential calculations established the origin of these features, and comparison with experiment was excellent. The sharp C Is main line indicated a single species, and the nine satellite structures were due to shakeup and plasmon features. The 1.9-eV feature reflected transitions to the lowest unoccupied molecular level of the excited state. 

Shortly after we had run this comparison study, our own aged freeze-drier collapsed into obsolescence. In order to make this method work, the freeze-drier must be specially constructed, without resin in the vacuum chamber and with traps placed in the vacuum line to prevent the back-diffusion of oil vapors from the pump to the vacuum chamber. While we have been awaiting the rejuvenation of our own instrument, rebuilt to these specifications, Michael McKinnon, of our laboratory, has developed a variation of the Russian evaporation method. In this method, as in the freeze-drying method, the great problem is avoiding contamination. Fortimately, when contamination does occur, it seems to affect an entire batch of samples. It is therefore possible to detect the contamination by the judicious use of standards. This method gives values for DOG of the same order as the lowest freeze-drying values or the Sharp (27) direct injection values. 

The comparison of Fig. 3 and Fig. 4 showed that severe carbon deposition occurred on the Ni-Mg-Ce/Si02 catalyst and the concentration of carbon reached 80.3% although nickel was highly dispersed. The results indicated that the carbon was the dominant element on used Ni-Mg-Ce/Si02 catalyst. The carbon deposition resulted in the significant decrease of the concentrations of Ni, Mg, and Ce. The sharp decline of concentration of Si and O were also clearly demonstrated. The variation of elemental concentration gave good evidence that carbon deposited not only on the metal active sites but also on the support. 

The ranking of the materials with regard to impact strength is seen to be influenced by the test temperature. Thus, at room temperature (approximately 20°C) polypropylene is superior to acetal at subzero temperatures (e.g., — 20°C) polypropylene does not perform as well as acetal. This comparison pertains to impact behavior measured with a sharp (0.25-mm) notch. Note that notch sharpness can influence the impact strength variation with temperature quite significantly. Figure 3.39 shows that when a blunt (2-mm) notch is used, there is indeed very little difference between acetal and polypropylene at 20°C, whereas at — 20°C acetal is much superior to polypropylene. 

In the continuing series of reports from the Ames Laboratory, Kai et al. (1989) discuss more extensive and refined heat-capacity studies on LaD , and LaH . (1.9electronic specific heat coefficients (mJ/molK ) are y = 0.81 + 0.01 for LaH2(D2) and 0.038 0.01 for LaH3(D3), with Debye temperatures of D = 348 + 2 and 381 + 2K, respectively. As in the work of Ito et al. (1982,1983), four sharp peaks are observed for LaDj 95, but at slightly different temperatures. Similar results were also quoted for samples at x = 2.65,2.75,2.80 and 2.90 where the cubic-to-tetragonal transition occurs, and all have a common peak at 250 K. These results and the lack of an observed cubic-to-tetragonal distortion for x = 2.53 correlate with the X-ray data in fig. 3. On the basis of the variation of the electronic specific heat coefficient with composition, special stabilities are proposed for compositions with X = 2.25,2.50 and 2.75. For x = 2.25, the proposal seems somewhat nebulous because of the broad /1-phase shown in fig. 4, but a positive relation is evident for the y and t] phases. Whether the 5 and e phases, near 2.62 and 2.66, respectively, should appear is, of course, a matter of conjecture. The authors present entropies of transition and provide an extensive discussion that includes comparisons of their experimental results with band-structure values. 

FIGURE 1.10. (a) Variation of with redox site concentration according to the He-Chen model [see Eqn. 38(a)]. (b) Comparison between the He-Chen prediction and experimental data for electron-hopping diffusion coefficients for Os(bpy)f loaded in Nafion films obtained via complex impedance spectroscopy by Sharp and coworkers (Ref. 40). 

We have described a molecular dynamics study of thermal ignition and have presented results on the critical behavior of a self-heating slab. Other quantities which have been examined are temperature profiles and the variation of ignition time with 6 [14]. Comparison of a steady-state temperature distribution at subcritical condition with Eq.(7) reveals a sharp temperature change at the wall boundary, implying that that other boundary condition [18] besides 0(x=l) = 0 should be used. Ignition times are expensive to simulate because a number of runs are required to average out the statistical fluctuations they are also difficult to calculate from continuum theory [9,19,20]. Consequently, only a preliminary comparison has been attempted [14]. 

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