Q temperature

Figure 4. Comparison between the discharge characteristics of newly developed and conventional alkaline-manganese cells (load 7.5 Q temperature 20 °C)...

SG = Pump speed at PG", liters/sec T = Temperature, °R = 460 + °F t = Evacuation pump downtime, min q = Evacuation pump downtime, sec q, = Ambient air temperature, °F tm = Temperature of mixture at ejector suction, °F q = Temperature of steam on downstream side of nozzle, °F... 

To overcome the problem of non-ideality the work be carried out at the Q temperature because in nonideal solutions the apparent Molecular weight is a linear function of concentration at temperatures near Q and the slope depending primarily on the second virial coefficient. 

Given 10,000 Ib/hr of 700°F cycle exhaust gas passing through a heat recovery boiler (HRB) (a) How much 150 psia, 400°F steam can be produced (b) How much heat is transferred from the gas to the steam (c) What is the exhaust temperature of the gas leaving the HRB and (d) Sketch the T-Q (temperature-heat) diagram for the HRB. Assume a gas side mean heat capacity of 0.25 Btu/lb, °F, an evaporator pinch temperature of 30°F, a feedwater temperature of 60°F, and an evaporator drum pressure of 180 psia to allow for pressure losses. 

Fig. 6.6 Variation of the static structure factor S(Q) measured on hPE-dPEE diblock copolymer chains (sample IV) as a function of the wave number Q. Temperature closed star 393 K, closed circles 403 K, closed square 413 K, inverted triangle 423 K, closed star 433 K, open triangle 433 K, open circle 453 K, open square 463 K. Solid lines represent the fit with a two-component static RPA approach (Eq. 6.12). (Reprinted with permission from [44]. Copyright 1999 American Institute of Physics)...

Skinner et al. (55) used GC/MS in their analyses of barbiturates. Samples were methylated (1,3-dimethyl derivatives) on-column using trimethylanilinium hydroxide. The analysis was conducted on 3% OV-1 on Gas Chrom Q. Temperature was programmed from 120 to 220°C at 10°C/min. 

Heat flow, q Temperature gradient, VJ Thermal conductivity, k q = -kWT... 

Liquidus temperature, austenitic primary phase, °C Q) Temperature of formation of eutectic, C (T)... 

Each fraction was evaporated to dryness in 10-ml pear-shaped flasks, redissolved in a small amount of methylene chloride, and gas chromatographed. GC conditions were as follows column, 6 ft X 0.125 in. od stainless steel packed with 3% OV-17 on 100-120 mesh Gas-Chrom Q temperature program, 70-330°C at 12°/min, holding at the flnal temperature for up to 20 min and carrier gas flow rate, 28 ml/min. Fractions containing very little material or with GC patterns very much like adjoining fractions were combined. These fractions were then analyzed on the GC-MS computer system to obtain mass spectral data on the individual components. For certain fractions additional information was gained from ultraviolet spectra. 

Sun, W.Q. Temperature and viscosity for structural collapse and crystallization of carbohydrate solutions, Cryo-Lett., 18, 99,1997. 

The magnitude of a depends on the forces of interaction between the solvent and the polymer chain. Thus, if the polymer is polar, when it dissolves in a polar good solvent, it will expand and a is large. The converse is true for poor (eg. non-polar) solvents and the chain will contract to lower than the unperturbed dimensions and, in the limit, the polymer may precipitate from solution. When a combination of solvent and temperature is found that is neither good nor poor , i.e. a = 1, then the chain-solvent and polymer-polymer interactions balance and Rq is the unperturbed dimension of the chain. For a particular solvent, the tempemture at which this occurs is the Q-temperature. 

The temperature at the point of contact B is called the self-ignition temperature. At this temperature, the rate of heat generation of the fuel mixture exceeds the rate of heat losses, so that the fuel mixture can heat itself up to the temperature q (temperature of self-ignition). Thus, the tangent point B detennines the conditions necessary for self-ignition. 

Column 10 m x 0.32 mm Pora PLOT Q temperature 175 "C carrier gas hydrogen injection 1.0 iil, split detector micro TCD. 

Company Temperature range (°q Temperature accuraqr (K) Heating rate (K min ) Resolution (noise) (pW) Time constant (s)... 

Temperature range 1 (30-43 °q Temperature range 2 (44-50°q Temperature range 3 (51-55 °q... 

Theta solvent The term relates to the temperature of any polymer/solvent pair at which chain expansion is exactly balanced by chain contraction. At this temperature, called Q temperature, chain dimensions are unperturbed by long-range interactions. 

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