Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Experiments 16 table

More quantitative results are available for the nitration of alkyl-thiazoles Dou et al. (373) determined the reactivity, relative to benzene, of the nitration site of various mono- and dialkylthiazole by competition experiments (Table 1-53). [Pg.104]

In all of these tests, flame acceleration was minimal or absent. Acceleration, when it occurred, was entirely due to intrinsic flame instability, for example, hydrodynamic instability (Istratov and Librovich 1969) or instability due to selective diffusion (Markstein 1964). To investigate whether the flame would accelerate when allowed to propagate over greater distances, tests were carried out in an open-sided test apparatus 45 m long (Harris and Wickens 1989). Flame acceleration was found to be no greater than in the balloon experiments (Table 4.1a). [Pg.71]

GTOs are widely used in molecular structure calculations, but have the wrong behaviour at the nucleus. We might expect them to give poorer agreement with experiment. Table 18.2 shows a selection of calculations for the H atom. Standard GTO expansions were taken from the literature and left uncontracted. [Pg.310]

Let s examine this table to see if it agrees with our laboratory experience. Table 12-1 summarized some of these results in a qualitative way. Extracting these four half-reactions from Table 12-11, we find... [Pg.211]

In order to make an effective use of the VB formulation we have to calibrate the relevant parameters using reliable experimental information. The most important task is to obtain the relevant a-. Since the a s represent the energy of forming the different configurations in the gas phase at infinite separation between the given fragments, it is natural to try to obtain them from gas-phase experiments. In the case of the catalytic reaction of lysozyme one can compile the relevant information from the available gas-phase experiments (Table 6.1) and use it to determine the a s. [Pg.162]

The results of heat and water stress experiments (Table 12.3) show that these factors had no significant effects on nitrogen isotope ratios of bone collagen or hair. The mean collagen-diet difference (A Nco-d) values of the water-restricted litters ranged from 2.6 %o for group 10 on diet A (36°, water ad... [Pg.250]

In the first series of experiments (Table 2) the influence of microwave pretreatment on extraction of pectin was followed. Microwave pretreatment had a slight positive effect on the... [Pg.942]

The asymptotic energy values obtained by a configuration interaction calculation at 25 a.u. corrected by the coulombic repulsion term (the l/R" term has been neglected) are seen to be in quite good agreement with experiment (Table 3). [Pg.337]

As seen before, the radical cation of dimethyl sulfoxide (0113)280 7 has been detected by E8R spectroscopy among other radicals when DM80 glasses at 77 K are submitted to y-irradiation . It has also been reported in pulse radiolysis experiments (Table 6). Constant current electrochemical oxidation of bis(dialkylamino)sulfoxides (R2N)280 gives rise to radical cations which have been detected by E8R spectroscopy . ... [Pg.1054]

NANM (N-al lyl-normetazocine or SKF-10,047) is tenfold more potent than (-)NANM and (-) cyclazocine is two- to threefold more potent than (+)cyclarocine. This stereoselectivity for block of Sv closely parallels the effects of these stereoisomers in behavioral and binding experiments (table 1). Furthermore, block of Sv occurs at nano- to micromolar concentrations of the more potent "sigma opiates"--comparable to the concentrations at which PCP and its more potent congeners act. [Pg.57]

For example, consider a two-factor design with each factor at two levels. This is also a form of all-possible-combinations experiment. One item we note here is that there is more than one way to describe the form of an experiment, and we include a short digression here to explicate this multiplicity of ways of describing an experiment. In this particular case, we have two factors, each at two levels. We can describe it as a listing of values corresponding to each experiment (Table 10-1). [Pg.63]

Figure 5 shows a hypothetical plot of the microscopic Kd values versus fractional occupancy of SBA binding to Tn-PSM. The horizontal dashed line is the observed Kd value of 0.2 nM obtained from the ITC experiments (Table I). However, due to... [Pg.157]

However, certain contradictions can be seen from the data of Tables 1 and 2. Indeed, the molecular weights determined for aqueous solutions of these p- and s-fraclions in the SEC experiments (Table 1) coincided well with the results of light scattering for DMSO solutions (Table 2) but why did the molecular weights differ so considerably from the light scattering data (Table 2) for the solutions of given copolymers in pure water, where, in... [Pg.126]

The first deposition experiments using SILAR were performed to grow zinc and cadmium chalcogenide films.1 Metal salt solutions and sodium sulfide were used as precursors in most experiments. Table 8.2 provides a more complete... [Pg.252]

Acyl protection should lead, as a consequence of neighboring-group participation and the anomeric effect, exclusively to a products. This has been proved in many experiments (Table XV) with Me3SiOTf as catalyst excellent yields could be obtained in cases where all other methods essentially failed (129). It could be shown that at least some of the reactions proceed via rapid orthoester formation (129), and this intermediate then rearranges under Me3SiOTf catalysis to the desired reaction product. [Pg.58]

Hawkins et al.131 addressed the hydration of 43 ions by means of the SM5.2R version of the GBM approach, with an MNDO Hamiltonian. On the average, they were within 3.4 kcal/mole of experiment. Table 12 compares some of the PCM and GBM free energies of hydration. In most cases, the two are very similar (when the Barone et al. radii are utilized) for four ions, however, the PCM are considerably better. [Pg.67]

Some experiments (Table 1, Experiments No. 97 and 108) were carried out in one leg of an H-shaped reactor. After the killing of the reaction, all volatiles were distilled into the other leg of the reactor which was then scaled off, and its contents were analysed by GLC for ethanol. We hoped to measure in this way the ethanol formed from the sec-oxonium ions by reaction (v), but as the results show, the recovery of ethanol was rather incomplete, presumably because much of it remained trapped in the polymer. In some experiments a phial containing a measured amount of water was broken before the initiator phial (Table 1, Experiments No. 115, 111 B, 114). [Pg.742]

Several studies have tested hypotheses derived from the CNBM by manipulating the availability of resources (nutrients or light) either in laboratory or in field experiments (Table 7.3). The phlorotannin content in F. vesiculosus at sites with naturally low nitrogen levels was decreased when seaweeds were fertilized in the... [Pg.161]

SO2 vapor pressure was determined in eight series of experiments (Tables II and III) with a total of about 80 solutions over the following range of conditions ... [Pg.275]

The uptake and elimination half-lives of 176 and 169 min and 27 and 29 min were similar to each other and to half-lives obtained using mussels maintained in the laboratory. Half-lives in the longer term laboratory culture experiments (Table IV) were similar to each other. Similarly, the mantle cavity and body water constants gave no indication of stress (Table II). Mussels used in these experiments were selected by size (ca. 6 g viscera fresh weight) and variability could be reduced by adoption of more objective criteria. Instant Ocean culture does not directly effect antipyrine disposition and laboratory conditions are suitable for maintenance of animals for at least short times. [Pg.269]

Basal enzyme levels for control fish in the Venezuelan crude experiment (Table V) were higher than the control values for experiments with pure hydrocarbons (Table IV). Increase in basal activity was correlated with an increase in water temperature and the initiation of feeding. Enzyme activity was consistently low in cunners during the winter, and appears to rise in late spring to a summer peak (24). [Pg.345]


See other pages where Experiments 16 table is mentioned: [Pg.228]    [Pg.74]    [Pg.148]    [Pg.431]    [Pg.239]    [Pg.365]    [Pg.77]    [Pg.180]    [Pg.95]    [Pg.196]    [Pg.148]    [Pg.157]    [Pg.108]    [Pg.38]    [Pg.87]    [Pg.102]    [Pg.39]    [Pg.188]    [Pg.190]    [Pg.202]    [Pg.101]    [Pg.108]    [Pg.231]    [Pg.661]    [Pg.161]    [Pg.570]    [Pg.396]    [Pg.116]    [Pg.268]   


SEARCH



© 2024 chempedia.info