Curved glass

The finely powdered mixture of potassium salicylate and carbonate is placed in a 500-cc. round-bottomed flask which is immersed in an oil bath so that only a small portion of the neck protrudes from the bath (Note 2). The bath is heated to 240° (Note 3) and maintained at this temperature for one and one-half hours. During this time the solid in the flask is stirred occasionally with a curved glass rod flattened at the end. 

Ion detection can be perfomed by a variety of methods, but the commonest by far is the channel electroi multiplier shown in Fig. 5.8. This consists of a curved glass tube of approximately 1 mm internal diamei with an inner resistive coating and a flared end. The multiplier can be operated in one of two modes. In tl pulse couuting mode — the most sensitive mode... 

Dry the petals in an empty egg carton (lined with plastic wrap) so that each petal can curve slightly or set a drinking glass on its side, cover it with plastic wrap, and dry the petals on the curved glass. 

The intensity of the method can be considerably increased and the explosion time considerably reduced if the detonation impact travelling from the explosive through the argon medium is made to turn back. This can be achieved by interposing a mass, which may be very small, such as an 0.2 mm-thick acetate foil, as an obstacle. The same effect can also be produced by using curved glass, such as a watch glass. 

A bent, two-armed glass vessel with a sintered disc e resembling that previously described by Strohmeier10 and Klein et al.11 (Fig. 1) is fitted with flasks (100 mL) at A and at B, which is connected by a curved glass adapter d. The apparatus is attached to a high-vacuum system by means of the pivotal glass joint c. 

Recommended impeller diameter-to-tank diameter D/T) ratios, for liquid-liquid operations vary from 0.25 to 0.40 for radial disk turbines, from 0.4 to 0.6 for hydrofoils and propellers, and from 0.5 to 0.8 for retreat-curve, glassed-steel impellers. Vertical placement of the impeller depends on the vessel shape and the application. For dispersion by continuous addition of a dense phase fluid into a less dense fluid, the impeller should have a relatively small impeller clearance off the reactor bottom, C, with respect to the final height of the dispersion, H, i.e., the impeller should be placed low in the vessel (C H/A to H/S). For dispersion of light liquids, it is good practice to place a single impeller between 0.20 < C/H < 0.50. 

Keywords Colloidal dispersion Flow curve Glass transition Integration through transients approach Linear viscoelasticity Mode coupling theory Nonlinear rheology Non-equilibrium stationary state Shear modulus Steady shear... 

The 1950s saw the introduction of a number of very small, threewheeled cars that were known as bubble cars due to their rounded forms and curved-glass windows. Their attraction was low price and low fuel... 

Apparatus 21 round-bottomed flask (three vertical necks), equipped with a mechanical stirrer, a gas-outlet (curved glass tube, 5 mm internal diameter, with glass joint). A stopper is placed on the third neck. 

Pitches were characterized by DSC andTMA by Barr and Lewis (238). The DSC curves of a typical petroleum pitch, which had a Mettler softening point of 152°C, are illustrated in Figure 7.15. An endothermic peak in the vicinity of the expected Tg point was found in the initial DSC curve. A second run of the sample, after cooling it rapidly from 240 to — 10°C, showed a well-defined Tg with an onset temperature of 83°C. The endothermic peak was no longer visible in the curve. Glass transition temperatures and softening... 

Optical distortion of the interior by the curved glass walls can be troublesome this can be alleviated by using flat glass ports which are cemented to short groimd joints (Fig. 53), by which they are attached to the tube. The tubes shown in Fig. 54 can be generally used for storage and transfer of air-sensitive solids. 

VI) 1.40 g/g. (B) Phase diagram compiled from DSC heating curves., glass transition , cold crystallization ... 

Fig. 59. Phase diagram for PCL/PS blends V homogeneous melt/PCL crystal coexistence curve, glass-transition temperatures, O spinodal and binodal taken from [80]...

Mould Mark. A fault on glass-ware caused by an uneven mould surface, or, in the case of curved glass sheets, by the dies or frame used in its shaping (see also JOINT line). 

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