Intensities effect

Crack is the free base form of cocaine which in contrast to cocaine, the salt form, can be smoked. This inhalative application results in a very rapid, intense effect. 

These time-intensity effects are illustrated in Fig. 42 by a plot of perceived intensity vs. time, curve A being given by a stimulus molecule, such as sucrose, which exhibits rapid taste onset and cutoff, and curve B approximates the behavior of most dihydrochalcone sweeteners. 

To reduce intensity effects, the data were normalized by reducing the area under each spectrum to a value of 1 [42]. Principal component analysis (PCA) was applied to the normalized data. This method is well suited to optimize the description of the fluorescence data sets by extracting the most useful data and rejecting the redundant ones [43]. From a data set, PCA assesses principal components and their corresponding spectral pattern. The principal components are used to draw maps that describe the physical and chemical variations observed between the samples. Software for PCA has been written by D. Bertrand (INRA Nantes) and is described elsewhere [44]. 

Smith, B., Wilson, R. and Davidson, R., Electrodermal activity and extraversion Caffeine, preparatory signal and stimulus intensity effects. Personality and Individual Differences 5, 59-65, 1984. 

Entezari MH, Kruss P (1996) Effect of frequency on sonochemical reactions n. Temperature and intensity effects. Ultrason Sonochem 3 19-24... 

Although he had never been a marijuana user, it was interesting that he experienced much more intense effects than his partner did. We videotaped the following interview seven hours after he received the compound ... 

Figure 20. Structural parameters as a function of time extracted by fitting the data shown in Figure 20. (A) Data collected during the oxidation of the Pt/C electrode and (B) during the reduction long dashes, first shell O coordination number (no. of O atoms) short dashes, first shell Pt coordination number (no. of Pt atoms) solid line, absorption peak intensity (effectively white line intensity).(Reproduced with permission from ref 43. Copyright 1995 Elsevier Sequoia S.A., Lausanne.)...

FIGURE 2.9 Effectiveness of a number of row pretreatments in eliminating addictive, multiplicative, and global intensity effects. 

The effect of radiation intensity was investigated for three compositions of PVC-styrene. The data for the 77-23 composition are shown in Figure 5. A radiation intensity effect is present even when postirradiation heating is used. When the 84-16 and 91-9 PVC-styrene compositions were similarly studied, no significant dose rate effect was found. 

The intensity of the bands due to CH stretching modes in methanol and ethanol have been found to be temperature- and concentration-dependent, though not to as groat a degree as the OH vibrations. This intensity effect is due to perturbations by the H-bond which are probably transmitted only as far as the a carbon atom. 

Sample preparation was given elsewhere [2]. Femtosecond fluorescence upconversion and picosecond time-correlated single-photon-counting set-ups were employed for the measurement of the fluorescence transients. The system response (FWHM) of the femtosecond fluorescence up-conversion and time-correlated single-photon-counting setups are 280 fs and 16 ps, respectively [3] The measured transients were fitted to multiexponential functions convoluted with the system response function. After deconvolution the time resolution was 100 fs. In the upconversion experiments, excitation was at 350 nm, the transients were measured from 420 nm upto 680 nm. Experiments were performed under magic angle conditions (to remove the fluorescence intensity effects of rotational motions of the probed molecules), as well as under polarization conditions in order to obtain the time evolution of the fluorescence anisotropy. 

Gases are dispersed in liquids usually to facilitate mass transfer between the phases or mass transfer to be followed by chemical reaction. In some situations gases are dispersed adequately with spargers or porous distributors, but the main concern here is with the more intense effects achievable with impeller driven agitators. 

Kinetic analysis. The observed light-intensity effect should permit a deeper insight into the mechanism of photoelectrochemical reactions. In this framework, a kinetic analysis of the stabilization process will now be made for an n-type compound semiconductor AB, which is being oxidized photoelectrochemically according to the over-all reaction equation... 

Up to date, the importance of illumination intensity has been paid little attention. According to the results obtained, (Br ) and (CT) were noticeably affected by the illumination intensity, although this was not the case for iodide ions. The ascending trend of (X ) observed with increasing ip, which was invariant with changing the rotation rate of the electrode, is believed to reflect an illumination intensity effect. 

Table I consists of a compilation of r /4> ratios as a function of X. Our results and those presented for p-GaP and n-ZnO are in rough agreement with this simple model (8,9,30,31,32). Construction of a more refined model awaits incorporation of other data (nonexponential lifetimes, electroabsorption, carrier properties, intensity effects, quantitative evaluation of 4>nr by photothermal spectroscopy, e.g.) and examination of other systems.

Clinical studies have documented the rapid tolerance development from repeated exposures to DOM. Five volunteers were given 6 milligrams daily for three days. Objectively, psychological tests showed a decrease in responses. Subjectively, all found extremely intense effects on the first day, and all but one found it unpleasant. By the third exposure on the third day, all had diminished responses, ranging from only moderately strong to felt absolutely nothing. One... 

Maillard (2 ) then used sugars instead of glycerol to investigate the formation of polypeptides by the reaction of amino acids with alcohols. It was found that the aldehyde group (of an aldose) had more intense effect on amino acids than did the hydroxyl groups. This led to the discovery of this reaction. 

To account for the high intensity effects, the IET has to be used here instead of the DET employed in Section II. 

Gutierrez M, Henglein A. Chemical action of pulsed ultrasound observation of unprecedented intensity effects. J Phys Chem 1990 94 3625-3628. 

---