Moderating power

Motor nd Drive. The preferred prime mover for a fan is usually an electric motor. Eor fans of low to moderate power, V-belt drives are frequently employed. This permits selection of fans that can be operated over a wide range of speeds rather than being limited to motor synchronous speeds. Furthermore, change of speed is less expensive with V-belt drives. However, fans requiring powerful motors, 37—75 kW (50—100 hp) and higher, are generally directly connected to the motor and driven at synchronous speed. 

A variety of graphite moderated reactor concepts have evolved since the first aircooled reactors of the 1940s. Reactors with gas, water, and molten salt coolants have been constructed and a variety of fuels, and fissile/fertile fuel mixtures, have been used. The evolution and essential features of graphite moderated power producing reactors are described here, and details of their graphites cores are given. 

When focussed into a diffraction limited spot (ca. 10 y in diameter) the 1 mW laser yields a power density of 10 watts per square centimeter. Readily available c.w. lasers produce 10 watts of output, whence a focussed power density of 10 w/cm can be obtained. Moderately powerful pulsed lasers may produce pulse... 

There are claimed advantages and disadvantages for both techniques. Both have sensitivities of about 10 cc per quantum state for moderate power laser sources. Of course increased laser power provides increased sensitivies in either case. One advantage (we feel) to the LIF technique for NO detection is that a single calibration of the apparatus constant (photon collection and detection efRciencies) is valid for pressure from 10" torr to one atmosphere. 

Treatment of the most powerful dinitro 5-salt 39 with triphenylphosphine gave (trifluoromethyl)triphenylphosphonium triflate in good yield (Eq. 31). However, moderately powerful 5-salt 17 did not produce the phosphonium triflate even at an elevated temperature. 

It would appear that propagating low-vel is not achieved in small diam cartridges with non-aerated BG but that high-vel propagation can be obtd with such material if a moderately powerful initiator is used... 

Explosive Compositions for Oil Well Gun Perforators. Expl charges consisting of the Pb Salt (I) of ethylene din itramine or in combination with other heat stable propellants are suitable for deep well operations. This compd does not spontaneously explode under about 300° and it is a relatively powerful expl by itself. Low impact and friction sensitivity, moderate power or brisance, produces large vols of gas, high flash point Ref A.O. Franz, USP 2708623(1955) CA 49, 14326(1955)... 

The substance (I) is a moderately powerful explosive it gives an expansion of 250 cm3 in the lead block. It is less sensitive to impact than trinitrotoluene. Its ignition temperature (195-200°C) is about the same as that of tetryl. It forms inflammable salts. The lead, thallous and potassium salts bum violently with a sharp report. 

Suspension of solids is maintained by upward movement of the liquid. In principle, use of a draft tube and an axial flow impeller will accomplish this flow pattern most readily. It turns out, however, that such arrangements are suitable only for low solids contents and moderate power levels. In order to be effective, the cross section of the draft tube must be appreciably smaller than that of the vessel, so that the solids concentration in the draft tube may become unpractically high. The usually practical arrangement for solids suspension employs a pitched blade turbine which gives both axial and radial flow. 

The reactions in Table 1 are transfer of H, O, N, S, halogen and alkali metal atoms. They are also reactions of atoms (H, O, N, S, halogen and alkali metal atoms) with small molecules. They are exothermic and have high specific rates (low activation energies and normal steric factors). These features are desirable for the study of chemi-excitation. High heat release permits substantial excitation. Small, low moment of inertia product molecules have spectra that may be resolved with moderate power spectrographic and spectrometric instruments. High speed provides the necessary number of reaction acts per unit time. 

Decomposes with water, lower alcohols, and carboxylic acids to form hydrogen moderately powerful condensing agent with ketones and acid esters more powerful reducing agent toward metal oxides than lithium or sodium hydrides.1... 

Figure 2 shows the structures of the bifunctional model systems l(n), (n=4,6,8,10,12), investigatedThe synthesis of these systems and a discussion of their electrochemical properties as well as of their electronic absorption and emission spectra have been given elsewhere (Oevering et al., 1987). These molecules contain a 1, 4-dimethoxynaphthalene unit as the photoexcitable electron donor (E./2 =+1.1 V vs. see in acetonitrile) and a 1,1-dicyano-vinyl moiety as a moderately powerful electron acceptor (Ev=-. l V) separated by an array of at least n C-C sigma-bonds. The centre-to-centre separation (Rc) and the edge-to-... 

Q6 Thiazide diuretics are moderately powerful diuretic agents acting on the distal tubule of the nephron. They reduce reabsorption of sodium chloride and water by blocking the electroneutral sodium chloride (NaCl) transporter system at the luminal border of the distal tubular cells. In addition there are direct relaxant effects on vascular smooth muscle which reduces BP. Diuretics help patients in heart failure by reducing peripheral oedema and decreasing blood volume, which in turn reduces BP. In this way both preload and afterload are decreased and the work of the heart is diminished. 

TEX forms white to slightly yellow crystals, which may be colored brown to other various colors due to impurities. TEX is a moderately powerful explosive with definite stability. It can be used effectively in rocket propellants, high performance gun propellants, or high explosive compositions. ... 

Use a short pulse length and moderate power hard pnlse—check what has been used before for nuclides of similar y. Once you have found the signal of interest, measure the 90° transmitter pulse. Measure several pulses of different length you should observe a sinusoidal variation in the intensity of the NMR resonance (Figure 2). 

Ultrasonic streaming from the tip of the probe operated at moderate power is often sufficient to provide bulk mixing when dipped in the target system since energy losses during the transfer of ultrasound through the bath media and reaction vessel walls are... 

Separated isotopes have played an important role in the production of nuclear power and in the development of nuclear energy. The importance of separated isotopes in this field can be seen at once by considering the thermal neutron cross sections of those isotopes which have become important in the nuclear industry. A few of these are given in Table I. The very small neutron absorption cross section of deuterium, compared with protium, together with its excellent moderating power, has made heavy water a very important reactor moderator. has found wide-... 

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