Using Circulators

Another approach is to use a circulator as shown in Fig. 2.19. Here the transmitter with internal impedance Zq is connected to port 1, the antenna with antenna impedance Za to port 2, and finally the receiver with input impedance Zr to port 3. The workings of a circulator is now such that a signal applied to port 1 will occur only at port 2, while a signal applied to ports 2 and 3 will occur only on ports 3 and 1, respectively. Thus a signal incident upon the antenna will see only the receiver input impedance Zr rather than the transmitter impedance Zq. Since the former in general is matched well to the antenna impedance Z, a low reradiation will occur in contrast to seeing Zq that may be quite different from Za (see Section B.9.1). 

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Freeze drying has also been carried out at atmospheric pressure in fluid beds using circulating refrigerated gas. Vacuum-type vibrating conveyors, rotating multishelf dryers and vacuum pans can be used as can dielectric and microwave heating. 

This paper demonstrates the technical feasibility of a plastics energy recovery plant using circulating fluidised bed technology from Ahlstrom of Finland. Full details are given of a two-phase test run conducted at Ahlstrom s pilot plant in Karhula, in order to obtain information on the process behaviour when combusting different types of plastics waste. Results are presented and conclusions drawn. 

The process at Three Mile Island involved nuclear fission and subsequent reactor cooling using circulating water. The primary water was kept under pressure to prevent boiling. Heat was transferred to a secondary water system that supplied power to a steam generator. Upon completion of this step, steam condensate was recovered and recycled. All radioactive materials, including primary water, were enclosed in a lined concrete containment building to prevent their escape to the atmosphere. 

Electrophoresis is done in a hood with 35-60 V (cv) using circulating Soln. A as electrode buffer. 

The chilled water (7°C) for the absorber is supplied by an absorption refrigeration unit, using heat recovered from the compressor intercooler as the energy source. Heat for ammonia vaporization, as previously noted, is available at 35°C and is recovered from the secondary gas cooler. The system uses circulating condensate as the energy transfer medium. 

Scarborough RM, Kleiman NS, Phillips DR. Platelet glycoprotein llb/llla antagonists. What are the relevant issues concerning their pharmacology and clinical use Circulation 1999 100(4) 437-444. 

Tetrahydrofuran (freezing point -108°C, boiling point 67°C, density 0.8892) can be manufactured from butane by using circulating solids technology in which butane is oxidized to maleic acid and thence to tetrahy-drofuran (Fig. 1). 

A third option is to use circulating boiler water to preheat the air. If the steam already includes circulating pumps, the existing pump system may not need to be expanded. The last two options have the added advantage of reducing the steam make, which unloads the steam drum86. 

In cool, low-humidity weather open windows, use circulating fans. If mold is already present, do not circulate air. 

Extruders are available with capacity of more than 1 tonne/h, to mix and melt plastics and provide profiles, tubes, sheet, etc. They are mostly heated electrically, or else using circulating thermal oil, and can be used in pyrolytic systems for feeding plastics, straining the molten feed, eliminating HCl from PVC at temperatures up to some 400°C. Professor... 

Danahy DT, Aronow WS. Hemodynamics and antianginal effects of high dose oral isosorbide dinitrate after chronic use. Circulation 1977 56(2) 205-12. 

The pilot plant proved that a powdered fuel could be produced by treatment with chemical agents followed by grinding the treated material in a ball mill using circulating hot balls to dry and grind the material. On this basis the full-scale plant was built as an add-on to the East Bridgewater facility, and started producing the new fuel in 1975. 

Acidic gaseous streams from the detergent alkylation units usually are combined and sent to a relief gas scrubber where HF acid is removed by countercurrent gas-liquid contacting using circulating limewater solution ... 

Machine used Circulating machine Package m/c Kier Jig Beck Rotary... 

Wittsack, H.J., et al., CT-perfusion imaging of the human brain advanced deconvolution analysis using circulant singular value decomposition. Comput Med Imaging Graph, 2008. 32(1) p. 67-77. 

Clouse ME, Chen J, Krumholz HM. Noninvasive screening for coronary artery disease with computed tomography is useful. Circulation 2006 113 125-146. 

The blood clot formed in a test tube is strikingly different from a thrombus deposit formed in vivo in the vascular system. A clot in a test tube consists of a fibrin network in which red cells, white cells, and relatively small numbers of platelets are found. On the other hand, an in vivo thrombus deposit consists of large amorphous masses of platelets, surrounded by white cells with a few red cells. However, it is possible to form deposits closer to thrombi rather than to blood clots in vitro by using circulating plastic loops in which the blood is in motion during coagulation. ... 

In a variant of the process called the Cold-box Plus process the corebox is heated to 40 - 80 °C using circulating hot water. This yields cores with even better mechanical properties, but results in higher interval times. 

The gas leaving the hydrogenation reactor is first cooled in a waste heat boiler to about 170°C and then in a quench cooler to approximately 35°C. The quenching operation uses circulating water from which the heat is removed in a cooler. Unlike the Sulfreen process described above, this process produces condensate as the gas is cooled below the steam dew point this condensate has to be withdrawn from the water loop and fed to a stripper to remove H2S. A blower delivers the almost dry gas from the quench cooler to an absorber to eliminate the hydrogen sulfide by means of an amine wash liquor. 

The moving bed-type process that eventually won" was fluid catalytic cracking (FCC). The early developments for this process were accomplished by Standard (New Jersey). Work with fixed-bed reactors during the late 1930s convinced E. V. Murphree, vice-president in charge of development, to conclude that the only viable approach was to use circulating catalyst processing that would allow steady-state operations (4). He also made the decision to utilize a powdered catalyst (4). 

Dear, J.W., et al., Letter to the editor early detection of paracetamol toxicity using circulating liver microRNA and markers of ceU necrosis. BrJ Clin Pharmacol, 2013. doi 10.1111/bcp.l2214. 

Fig. 2.19 Alternatively we may use circulators as shown above. A generator with impedance Zs at port 1 delivers a signal only to the antenna Zp. at port 2. However, an incident signal upon the antenna will be directed only to the receiver at port 3. Since in general the receiver impedance Zr is Zp while Zq Zp, we obtain alow backscatter by using a circulator.

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