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Decrease phases

Maximum residues (in mg/kg FW) and time post-administration were liver, 0.1, 2 h fat tissue, 0.09, 96 h kidney, 0.07, 4 h skin, 0.03, 8 h brain, 0.01, 4 h muscle, 0.008, 4 h and blood 0.003, 4 h. Half-time persistence was 6.5-13 h for the rapidly decreasing phase, and 4.8—8.9 days for the slowly decreasing phase (Ohno et al. 1986) Dose-dependent alterations of brain potentials without behavioral signs of chronic toxicity (USEPA 1980)... [Pg.872]

As expected, increases by a factor of 4 with decreasing phase volume in the CTAB pE over the composition range studied (Figure 1). In the Brij system quickly becomes approximately linear (within experimental accuracy) at the various compositions. An anomalously high value in the Brij pE occurs at (f) = 0.72. In this high-emulsifier region, however, the pE may have a different structure. [Pg.179]

Decreased phase 1 metabolism biotransformation of some drugs... [Pg.1379]

Most drugs used in anaesthesia are metabolised in the liver by phase I reactions, mediated by cytochrome P-450 enzymes. These are susceptible to destruction by cirrhosis, so that the biotransformation of drugs, such as opioids (except morphine), benzodiazepines, barbiturates, and inhalational agents, may be markedly altered in severe liver disease. These enzymes are found in the centrilobular areas, which are more prone to hypoxia. In contrast, the enzymes responsible for phase II reactions, found predominantly in the peripheral areas, often function normally even in advanced disease. The disposition of benzodiazepines that are eliminated primarily by glucuronidation, e.g. lorazepam and oxazepam, are unaffected by chronic liver disease. For drugs with low hepatic extraction, advanced hepatocytic dysfunction decreases phase I and II biotransformation with a reduced clearance and prolongation of the elimination half-life. This is often partially offset by an increased free fraction due to decreased protein binding. [Pg.286]

Time-domain response of feedback amplifiers has been regularly correlated with frequency-domain behavior, and vice versa. Examples have usually been restricted to those situations in which only the amplifier contributes phase shift (single pole) or where a second source of phase was included (two-pole), such as from nonideal amplifier design or from the effects of stray capacitance at the input terminal. The system of interest in electrochemistry is more complicated than a two-pole system because there is also a decreasing phase shift caused by... [Pg.210]

X-Ray analysis confirms the structure shown for the polymer, and the bond distances found for the chain indicate that B is the major contributing structure - . Intense bands for C=C and C=C in the Raman spectra also indicate that B is the major contributor, but the relatively low frequencies for these vibrations as well as the linear correlation found between the two frequencies for various polymers suggest that A makes a significant contribution . Both frequencies are found to increase with decreasing phase perfection. [Pg.83]

However, PDMS-modified silica aggregates seem to coat nearly the entire toner particle. Their topographical diameter is doubled compared to the HMDS-coated particles, but the diameter estimated from the phase image is very similar to the one foimd for the HMDS-modified ones. The maximum phase shift is reduced compared to the samples above. This indicates that the silica aggregates are covered by a soft material - the silylation layer. This soft material covers not only the particles but also the resin surface in between them. This can be seen by the decreased phase shift in between the silica particles compared to the pure resin. As in sample (Fig. 5b), probably the PDMS silylation layer interacts with the toner resin surface, increasing the overall adhesion. [Pg.915]

The S vs. W2 dependence for Series 111 shown in Fig. 17 is particularly interesting. Apparently, upon addition of a small quantity of LPX-24, W2 20%, the polydispersity Increases, as it should in a miscible system. However, for W2 > 20% the polydispersity seems to decrease. Phase separation in the vicinity of 20 wt% of LPX-24 could provide a mechanism for such behavior. [Pg.179]

The formation and evolution of multiple waves becomes more complicated when chemical reactions or phase transitions occur. Volume decreasing phase transformations cause the pressure at point B in Figure 2 and Figure 7 to decrease with time. This common phenomenon is known as elastic precursor decay in elastic-plastic wave system. [9] The timescale for this pressure decay depends primarily on the timescale for the chemical reaction or phase transition that gives rise to the 2" wave. [Pg.318]

Due to the reduced Q factor of the quartz crystals in liquids, and therefore decreased phase slope, the requirements of the circuit with respect to phase (frequency dependence, noise, temperature dependence), to amplification linearity, and to temperature constancy are much higher. One electrode of the quartz crystal should be grounded to minimize parasitic effects and to allow operation of quartz arrays in conductive liquids. The increased damping of the oscillator should be overcome by automatic level control. The control variable in the amplitude control loop can be used as an independent measurement value. It also allows for calibration of/osc with respect to/s [36]. [Pg.29]

Drugs may slow automatic rhythms by altering any of the four determinants of spontaneous pacemaker discharge, increase maximnm diastolic potential, decrease phase 4 slope, threshold potential, or increase action potential duration. Adenosine and acetylcholine may increase maximum diastolic potential, and P-adrenergic receptor antagonist (P-blockers) may decrease phase 4 slope. Block of Na+ or Ca " channels usually results iu altered threshold, and block of cardiac K+ channels prolongs the action potential. [Pg.47]

Variation of phase velocity over a range of solid-volume percentages are calculated for the above models for two types of particles, i.e., glass beads and kaolins (with acoustic impedances of 21.12 x 10s and 10.66 x 105 g/cm2-s, respectively). Calculated results are shown in Fig. 5-27 for glass beads and in Fig. 5-28 for kaolins. All models, except Biot-2, show decreasing phase velocity at lower volume fractions, then increasing phase velocity at higher volume fractions. [Pg.192]

Enhanced automaticity may occur in cells that normally display spontaneous diastolic depolarization— the sinus andAVnodes and the His-Purkinje system. [) Adrenergic stimulation, hypokalemia, and mechanical stretch of cardiac muscle cells increase phase 4 slope and so accelerate pacemaker rate, whereas acetylcholine reduces pacemaker rate both by decreasing phase 4 slope and by hyperpolarization (making the maximum diastolic potential more negative). In addition, automatic behavior may occur in sites that ordinarily lack spontaneous pacemaker activity e.g., depolarization of ventricular cells by ischemia) may produce such abnormal" automaticity. [Pg.583]

Different polymer concentrations were studied to provide the data for Fig. 6.6. At the higher polymer concentrations, only the initial stages of the coil-globule transition could be observed because as the temperature was decreased, phase separation occurred. Figure 6.6 displays a portion of the phase diagram for the chosen molecular weight polystyrene in cyclohexane. [Pg.132]

The extent of collision quenching is very sensitive to solvent viscosity, and also depends on temperature. Additionally, the unquenched [Ru(Ph2phn)3] lifetime in propanol decreases from 52 /cs at 20 to 2.9 fts at 50 "C which results in decreased phase angle from 813 to 76.4 degrees at 03 MHz. This is a modest effect compared to the almost 70 degree change due to oiygen partial pressure from 0 to 200 mm Hg. Hence, temperature effects are simple to correct for, and in fact the unquenched lifetimes of other Ru(II) complexes can be used to measure the temperature (30,58, Lakowicz, J.R. Szmadnsld, H. unpublished observation). [Pg.201]

The EGA in canine stomach was modeled [Sarna et al., 1972] using an array of 13 bidirectionally coupled relaxation oscillators. The model featured (1) an intrinsic frequency decline from corpus to the pylorus and from greater curvature to the lesser curvature, (2) entrainment of all coupled oscillators at a frequency close to the highest intrinsic frequency, and (3) distally decreasing phase lags between the entrained oscillators. A simulated circumferential transection caused the formation of another frequency plateau aboral to the transection. The frequency of the orad plateau remained unaffected while that of the aborad plateau was decreased. This is consistent with the observed experimental data. [Pg.98]

Figure 4.8 [93] which relates to final particle size distributions is in accordance with these expectations. It was also shown that the breadth of the particle size distribution decreases with increasing temperature (i.e. increasing initiation rate) and with decreasing phase ratio, but increases with increasing emulsifier concentration (which should prolong Interval I). [Pg.83]

Shah, S., Whalen, C., Kotler, D.P., Mayanja, H., Namale, A., Melikian, G., Mugerwa, R., and Semba, R.D. (2001) Severity of Human Immunodeficiency Virus Infection Is Associated with Decreased Phase Angle, Fat Mass and Body Cell Mass in Adults with Pulmonary Tuberculosis Infection in Uganda, J. Nutr. 757,2843-2847. [Pg.293]

The dynamic storage modulus G presents an interesting variation when y increases at very low shear strain, G is constant (phase 1 in Figure 8.5), then strongly decreases (phase 2 in Figure 8.5), and reaches a plateau value (phase 3 in Figure 8.5). This evolution of G is usually described as the Payne effect (Harwood et al., 1965). [Pg.405]

Electrospinning [29] is a facUe method to make almost any polymer into nano- and micro-fibers if the polymer can be solution-processed or melt-processed (Figure 7.4). However, due to the low solubility of polyaniline, it is very difficult to make polyaniline fibers thinner than 100 nm. To solve this problem, polyaniline is usually blended with a more soluble polymer to increase the weight percentage of polymer in solution. As a result, the obtained nanofibers are a polymer blend [29—33] this significantly reduces the conductivity of the polymer. Additionally, when the size of the fiber decreases, phase separation may occur, yielding a mixture of nanofibers of polyaniline and other polymers [33]. [Pg.213]


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