Percent content

The CaO content of commercially available quicklime can vary quite widely over an approximate range of 70 percent to 96 percent. Content below 88 percent is generally considered below standard in the municipal use field. Purchase contracts are often based on 90 percent CaO content with provisions for payment of a bonus for each 1 percent over and a penalty for each 1 percent under the standard. A CaO content less than 75 percent probably should be rejected because of excessive grit and difficulties in slaking. 

Fig. 15. Percent content of the a form in the crystalline phase (PJ for compression moulded samples from y form powders of s-PS, versus the maximum temperature of heating of the melt (TmsJ [9]. The percent content of the P form is (100 — PJ...

Figure 1 shows the distribution of 650 F+ volume percent content in reduced crude for some 50 crudes then available to Ashland. Figure 2 indicates the volume percentage of 1050°F+ present in the same crudes, ranging from less than 10% to more than 30%. 

Percent content Material load (g) Plate diameter (mm)... 

The gradient is defined by the variation of composition of the mobile phase by the percent contents of the weaker component A and the stronger component B, called the modifier. The gradient is also characterized by its steepness and shape. The steepness is defined by the concentration of the modifier of the first and last... 

The aromatics content of aviation turbine fuel is included in the aviation turbine fuel specification (ASTM D-1655). Another test method for aromatics content (ASTM D-5186) involves the injection of a small aliquot of the fuel sample onto a packed silica adsorption column and elution with supercritical carbon dioxide as the mobile phase. Mono- and polynuclear aromatics in the sample are separated from nonaromatics and detected with a flame ionization detector. The chromatographic areas corresponding to the mono- and polynuclear and nonaromatic components are determined, and the mass percent content of each of these groups is calculated by area normalization. The results obtained by this method are at least statistically more precise than those obtained by other test methods (ASTM D-1319, ASTM D-2425). 

Figure 5-7. Opium and its major alkaloids (percent content in crude opium).

Leady oxide consists of lead oxide and free metallic lead. When produced by the ball mill method, the degree of oxidation of 65—75% is achieved, while the Barton process yields leady oxide powder with 70—80 wt% PbO content. When the leady oxide contains more than 30 wt% free lead, the material becomes very reactive. It is readily oxidized in humid air and the heat produced by this exothermic reaction may lead to combustion and damage the production equipment. Hence, effective control of the percent content of imoxidized lead in the leady oxide is very important, both during the production process and during the subsequent handling and storage of the leady oxide. 

Most appropriate for determining the specific surface of powder materials of the above types is the adsorption method, or BET process. The average specific surface of leady oxide measured by BET is 0.7—1.4 m g for the Barton type and 2.4—2.8 m g for the ball mill type, respectively. It has been established that the BET surface area depends on the content of p-PbO in the leady oxide [21]. A maximum area is obtained at 15 wt% P-PbO level. It could be expected that the latter leady oxide would have the highest reactivity as well. The percent content of the P-PbO crystal modification can be controlled by varying the temperature of the Barton pot. Process temperature of about 450 °C yields the leady oxide with approximately 15 wt% P-PbO. 

The crystal phase composition of the pastes and of the active masses is easily determined through X-ray diffraction analysis hy measuring the relative intensities of the characteristic diffraction lines for the different phases in the pastes. The relative percent content of phase a in a mixture of crystal components is Ca and is equal to ... 

Only when a H2SO4/LO ratio of 8% is reached, formation of the crystal phase PbO-PbS04 starts, and the characteristic diffraction lines for this phase appear in the XRD pattern (Fig. 6.5). The relative percent content of 3BS increases but very slightly up to 10% H2SO4/LO. 

Montell s in-reactor CataUoy ( catalytic alloy ) polymerization process alloys propylene with comonomers, such as EPR and EPDM, yielding very soft, very hard, and rigid plastics, impact grades, or elastomeric TPOs, depending on the EPR or EPDM percent content. The term oleflnic for thermoplastic olefinic elastomers is arguable because of the generic definition of olefinic. TPVs are composed of a continuous... 

Chemical phase Distribution rate/% Percent content/%... 

This roast experiment was carried out in the vertical furnace. In the process of double-layered pellet roasting, two gas-washing bottles containing sodium hydrate solution were placed in the outlet of equipment to prevent SO2 and AS2O3 diffusing into environment, hmer pellet calcine must be separated from solidification coat layer when double-layered pellets are cooled to room temperature. At the last, KB1O3 titration and classic BaS04 precipitation methods were used to analysis the percent content of arsenic and sulfur respectively. 

Figure 8.4 Weight losses of the photo-cured PCL-related bioelastomers during in vitro degradation in phosphate buffer solutions (pH = 7.4, 37 °C). The high molecular weight (9300 g mol ), medium molecular weight (4800 g mol ), and low (1800 g mol ) molecular weight oligomers are denoted by H-x, M-x and L-x, respectively, where x represents the percent content of s-CL. Source Shen et al. ...

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