Performance tables

Low temperature filtration (qv) is a common final refining step to remove paraffin wax in order to lower the pour point of the oil (14). As an alternative to traditional filtration aided by a propane or methyl ethyl ketone solvent, catalytic hydrodewaxing cracks the wax molecules which are then removed as lower boiling products. Finished lubricating oils are then made by blending these refined stocks to the desired viscosity, followed by introducing additives needed to provide the required performance. Table 3 Usts properties of typical commercial petroleum oils. Methods for measuring these properties are available from the ASTM (10). 

PEI polymers exhibit minimal creep underload. Eor example, unreinforced Ultem 1000 maintains part dimensions over thousands of hours at room temperature at a loading of 34 N/mm (4930 psi). PEI resins are available with HDTs ranging to 220°C (Ultem 5000). PEI copolymers with siUcone mbber allow for flame-retardant, high temperature appHcations such as plenum wire coatings (Siltem). Reinforcement of PEI resins improves their temperature performance. Table 13 compares unreinforced and 20% glass-reinforced Ultem resins. 

Turbomaehinery operating pressures, temperatures, and speeds are very important parameters. Obtaining aeeurate pressures and temperatures will depend not only on the type and quality of the transdueers seleeted, but also on their loeation in the gas path of the maehine. These faetors should be earefully evaluated. The aeeuraey of pressure and temperature measurements required will depend on the analysis and diagnosties that need to be performed. Table 19-2 presents some eriteria for seleetion of aerothermai instrumentation of pressure and temperature sensors for measurement of eompressor effieieney. Note that the pereentage aeeuraey requirements are more eritieal for temperature sensors than pressure sensors. The requirements are also dependent on the eompressor pressure ratio. 

Non-chromate and low-VOC containing primers are capable of excellent performance. Table 4 shows the results of a comparison of various environmentally acceptable primers with 250°F curing adhesive with the standard BR 127 solvent-based chromate inhibited primer [42]. 

From manufacturer s performance tables, select pump nearest to GPM and head requirements. 

Cost of the packing and its effect on the system costs must be considered, as some packings are much more expensive than others, yet produce very little improved performance. Table 9-17 presents some comparative information. The most common packings and hence the ones with the most available data are Raschig rings, Berl saddles, several saddle types and Pall Rings (Norton Co.) or equivalent. 

Correct gas/air stream for other than standard density (0.075 Ib/fF) because the manufacturer s fan performance tables are based on dry air at 70°F at sea level at a density of 0.075 Ib/fF. For flow densities other than 0.075, corrections need to be made. 

The three types of centrifugal fan blades—radial, backward, and forward—give three characteristic performances. Table 12-12B gives a quick comparison. 

The performance of a fan is usually obtained from a manufacturer s specific curve or performance tables. Expected performance for a change from one condition of operation to another, or from one fan size to another, is given in Table 12-16 for geometrically similar fans. 

Performance tables are based on standard dry air at 70°F at sea level (barometric pressure 29.92 in. Hg) with a density of 0.075 lb per fp. When the fans are required to handle gases at other conditions at the inlet, corrections must be made for temperature, altitude, and air or gas density. 

More accurate pressure-volume measurements extending to much higher pressures have been performed. Table 4-IV shows the resulis of such experiments. 

In the parental strain enzymatic activity reached the maximum value at 96 h. The hybrids H5, H15 and HIO showed good activity compared to Aspergillus sp. CH-Y-1043. Also, a difference with respect to parental strain was detected, a slight drop of activity in hybrids at 120 h. This effect was not due to changes of the pH during fermentation because it was similar in all cultures. The causes of this response in hybrids are unknown. More experiments for to evaluate the presence of proteases in the culture medium should be performed. Table 3 presents the data of the higher levels of endopectinases produced by... 

This chapter deals with rate equations of chemical reactions carried out under batch or flow conditions. The applications are to identifying mechanisms of reactions, to sizing equipment, and to evaluating its performance. Tables 2.1 to 2.6 are an overview of the substance of this chapter. 

Intermediate precision is another measure of the performance of the method where samples are tested and compared using different analysts, different equipment, different days, etc. This study is a measure of interlab variability and is a measure of the precision that can be expected within a laboratory. Intermediate precision is not required if a reproducibility study has been performed. Table 6 lists the ranges and suggested acceptance criteria for evaluation of precision during method development. 

The MMP Sorbex process has many similarities but also some differences when compared to the detergent Molex process. As with all of Sorbex processes, the MMP Sorbex process operates in the Uquid phase, employing suitable conditions (pressure, temperature) to overcome any diffusion constraints to achieve target performance. Table 8.4 highlights and contrasts the different characteristics of the detergent Molex and MMP Sorbex processes. The process was successfully demonstrated in a continuous countercurrent moving bed separation pilot plant using commercial n-paraffin-depleted kerosene (Molex raffinate) feedstock. A typical gas... 

Very reeently Kureshy et al. [98] further reported non-salen chiral Schiff base derived Ti complexes as eatalysts 70, 71 (Figure 23) in the KR of meso-siiXheae oxide, cyclohexene oxide, cyelooetene oxide and cA-butene oxide with anilines. The study deliberated upon the role of several ehiral and achiral additives with these catalysts to give chiral y9-amino alcohols with high enantioselectivity ee, >99%) in excellent yield (>99%) at 0 °C in lOh. Unlike the monomerie version 72 the chiral catalyst 70 used in this study was recoverable and recyclable several times with retention of its performance (Table 10)... 

The main operating parameters which were varied were residence time (based on feed rate) and DDO ratio. Table I indicates the range of operating conditions used for all the experiments performed. Table II summarizes the particle size obtained using these conditions. 

C=C stretching frequencies experimentally range from 1570 cm in cyclobutene to 1872 cm in tetrafluoroethylene (see appropriate tables in Appendix A7). All levels of calculation reproduce the basic trend in frequencies but, on the basis of mean absolute errors, show widely different performance (Table 7-5). Local density and MP2 models with the 6-311+G basis set perform best and semi-empirical models and density functional models (except the B3LYP model) with the 6-3IG basis set perform worst. Hartree-Fock models with the 3-2IG and larger basis sets also turn in good performance. 

There are numerous methods for recording motor performance (Table 3.3), drawn mainly from occupational and traffic psychology. A comprehensive account of the methods available is given in Kunsman et al. (1992) and Deutsch Lezak (1995, chapter 16). Some of these tasks are subject to a pronounced practice effect and, if repeated several times by the same subject, turn into tests of attention and concentration rather than of motor performance. 

In an attempt to increase the nifedipine content of the microspheres, a number of experiments with increasing amounts of nifedipine were performed (Table 3). High payloads were achieved indicating that no rejection of nifedipine due to molecular interactions with the Eudragit polymers occurred. Drug loss values fluctuated with initial nifedipine concentration variation (Table 3). 

Different syntheses coupling Cl to C4 carboxylic acids and Cl to C9 alcohols for the industrial production of natural aromas were optimized, and production tests were performed. Table 11.2 summarizes some examples of the production rates of the system that can be achieved with an acid conversion exceeding 94% and a maximal excess of alcohol of 2 (mole per mole) in the worst cases ( ° > -11 kj mol ) for a residence time commonly observed as low as 0.5 to 0.15 s. 

Simulated pipe coalescence at temperatures above 40n C combined with demulsifier Injection is beneficial for the dehydration performance (Table ), giving residual water-in-oll after 30 minutes settling time of less than U. No pipe coalescence can be expected at 20° C. In an uninsulated flowline, the temperature (Fig. 4) will rapidly decrease to below 20° C, and the residence time in the hotter section of the flowllne will not be sufficient for effective coalescence. 

A comparison of sensitivity of some dmgs using DIOS-MS and MALDI-MS was performed. Table 11.1 contains the data, which show that on the Waters MALDI-LR-TOF mass spectrometer DIOS may be a preferable technique. These four drugs were 2-28 times more sensitive using DIOS than MALDI. Recent... 

A Draper-Lawrence design containing 13 points is performed (Table 3.51). It is convenient to treat the subregion studied as a concentration triangle in the new coordinate system (X], X2, X3 ) ... 

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