Circulator, 3-port

The whole apparatus, which was 10 cm tall, was mounted on a goniometer head, this being fixed to the 0-tumtable of the diffractometer. This arrangement allowed the sample to be exactly located at the center of rotation of the diffractometer. The body of the cell holder was of aluminum, clad in cadmium foil. The sample and solution were cooled using the water circulation ports illustrated, the temperature within the cell being monitored by means of a metal junction thermometer. 

Figure 23 Schematic diagiam of U.S. radiant smoke toxicity apparatus. 1. Specimen combustion cell. 2. Load cell.. 3. Radiant heatei. 4. Chimney. 5. Shutter. 6. Gas mixing chamber. 7. Gas sampling ports. 8. Animal exposure ports (if used). 9. Gas circulating port.

The amount of MW power reaching the sample in the resonator is controlled by a variable attenuator. Like the isolator, the circulator is a non-reciprocal device that serves to direct the MW power to the resonator (port 1 port 2) and simultaneously allows the signal reflected at resonance to go from the resonator directly to the receiver (port 2 port 3). 

Blood Access Devices. An investigational device called the Osteoport system allows repeated access to the vascular system via an iatraosseous iafusion directiy iato the bone marrow. The port is implanted subcutaneously and secured iato a bone, such as the iUac crest. Medications are adrninistered as ia any conventional port, but are taken up by the venous sinusoids ia the marrow cavity, and from there enter the peripheral circulation (8). 

Rubber Sleeve Core Barrels. Rubber sleeve core barrels are special application tools designed to recover undisturbed core in soft, unconsolidated formations. As the core is cut, it is encased in the rubber sleeve that contains and supports it. Using face discharge ports in the bit, the contamination of the core by circulating fluid is reduced. The rubber sleeve core barrel has proven to be a very effective tool, in spite of the fact that the rubber sleeve becomes weak with a tendency to split as the temperature increases about 175°F. 

The inner chamber of the oven has curved walls for smooth circulation of air the radiant heat from the sample injection port units and the detector oven is completely isolated. These factors combine to provide demonstrably uniform temperature distribution. (The temperature variance in a column coiled in a diameter of 20cm is less than 0.75°K at a column temperature of 250°C). 

Fig. 10.9 Circuit diagram for intraperitoneal hyperthermic chemoperfusion. Warmed chemotherapeutic agents are circulated through the abdomen and temperature at the inflow and outflow ports are continuously monitored (Reprinted from Reingruber et al., 2007. With permission from Elsevier) (See Color Plates)... 

During the past decade the lung has been (re)discovered as a suitable port of entry to the systemic circulation for various drugs. Among these drugs are many peptides and proteins [2], since the oral route cannot be used for these molecules. 

In the Riser Simulator, an impeller rotating at very high speed on the top of the reaction chamber keeps the catalyst fluidized between two metal porous plates, inducing the internal circulation of the reacting mixture in an upward direction through the chamber. When the reactor is at the desired experimental conditions, the reactant is fed through an injection port, and immediately after the set reaction time is attained, products are evacuated and analyzed by gas chromatography. Of particular importance to the experiments performed was the ability to extend reaction... 

A concentration detector such as the differential refractometer is shown here connected in series with the capillaries. Uie following conponents are typically used in the viscometer stainless steel capillaries of 1/16-in. o.d. and 0.016 in. i.d. X 8 in. long, 2 ml. sanple loop, Celesco pressure tramsducers of 1 psi rating, Valeo 6 port sanple valve. Burr Brown Log 100 OP. type differential log-anplifier, VWR-1145 circulation tenperature bath (-15 to 150 C). Several liquid chromatographic pumps have been used. A Du Pont 860 pump was used to obtain the data reported in this work. 

Oven-aging was carried out on 0.075-inch samples mounted on a rotating turntable in an air-circulating oven (port velocity 1000 ft./minute) for seven days at 100°C. 

Fate of free fatty acids The free fatty acids derived from hydrolysis of triacylglycerol may directly enter adjacent mus cells or adipocytes. Alternatively, the free fatty acids may be tra ported in the blood in association with serum albumin until tt are taken up by cells. [Note Serum albumin is a large prot secreted by the liver. It transports a number of primarily hydropl bic compounds in the circulation, including free fatty acids a some drugs.2] Most cells can oxidize fatty acids to produ energy (see p. f88). Adipocytes can also reesterify free fa acids to produce triacylglycerol molecules, which are stored ui the fatty acids are needed by the body (see p. 185). 

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