Matching efficiency

Because of technical constraints (several HT samples cannot be cut into 4 cm2 monoliths, due to their granular nature), the MCC-1 test could not be performed with our set of samples. Nevertheless, the normalized apparent dissolution rates of HT materials (r(glass)noll ), approximated as the release rates of silicon (r(Si)norm) obtained by the Strasbourg test (100-125 pm powdered samples), are also shown on Fig. 13 for comparative puiposes. Although not identical, the MCC-1 test and the Strasbourg test can at least be related in terms of their matching efficiencies ( HTmaterial/Eleachant) X corrosion 2.8 day/... 

Definition. A diuretic is any substance which increases urine and solute excretion. This wide definition, however, includes substances not commonly thought of as diuretics, e.g. water. To be therapeutically useful a diuretic should increase the output of sodium as well as of water, since diuretics are normally required to remove oedema fluid, composed of water and solutes, of which sodium is the most important. Diuretics are among the most commonly-used drugs, perhaps because the evolutionary advantages of sodium retention have left an aging population without salt-losing mechanisms of matching efficiency. 

Diuretics are among the most commonly used drugs, perhaps because the evolutionary advantages of sodium retention have left ari aging population without salt-losing mechanisms of matching efficiency. 

Immobilised microbes probably cannot match efficiency of traditional ion-exchange resins... 

Spin Welding. Spin welding is an efficient technique for joining circular surfaces of similar materials. The matching surfaces are rotated at high speed relative to each other and then brought into contact. Frictional heat melts the interface and, when motion is stopped, the weld is allowed to soHdify under pressure. 

Efficient translation depends on matching the preferred pattern of host codon usage in the heterologous gene. 

CH2—CI2—) —(—CF2— CFH—) (39). Ceramic crystals have a higher piezoelectric efficiency. Their high acoustic impedance compared to body tissues necessitates impedance matching layers between the piezoelectric and the tissue. These layers are similar in function to the antireflective coatings on a lens. Polymer piezoelectric materials possess a more favorable impedance relative to body tissues but have poorer performance characteristics. Newer transducer materials are piezoelectric composites containing ceramic crystals embedded in a polymer matrix (see Composite materials, polymer-MATRIX Piezoelectrics). 

The most dramatic evolution of a microwave power source is that of the cooker magnetron for microwave ovens (48). These magnetrons are air-cooled, weigh 1.2 kg, generate weU over 700 W at 2.45 GHz into a matched load, and exhibit a tube efficiency on the order of 70%. AppHcation is enhanced by the avaHabiHty of comparatively inexpensive microwave power and microwave oven hardware (53). The cost of these tubes has consistently dropped (11) since their introduction in the eady 1970s. As of this writing (ca 1995), cost is < 15/tube for large quantities. For small quantities the price is < 100/tube. 

Lasers can be coupled efficiently to fiber optic devices to deHver intense monochromatic light precisely to the desired region of the body, including internal organs (see Fiber optics). As in other cases of laser-induced photochemistry, biphotonic effects may be important (87). Lasers also offer the advantage of being able to concentrate the incident energy in a spectral bandpass matched to the absorption band of the sensitizer. 

Liquid scintillation counting is by far the most common method of detection and quantitation of -emission (12). This technique involves the conversion of the emitted P-radiation into light by a solution of a mixture of fluorescent materials or fluors, called the Hquid scintillation cocktail. The sensitive detection of this light is affected by a pair of matched photomultiplier tubes (see Photodetectors) in the dark chamber. This signal is amplified, measured, and recorded by the Hquid scintillation counter. Efficiencies of detection are typically 25—60% for tritium >90% for and P and... 

Final screen selection is such that the length and width dimensions match off-the-shelf machines in order to keep costs down. Operating the installed screen at a feed rate greater or less than the design rate results in a less efficient screening operation, because bed depth varies with feed rate. 

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