Steady state Stearic acid

Difference in stearic acid conversion between two consecutive samples of lower than 0.1% was considered as evidence of reaching the steady state operation. This typically required about 5 hours time as reflected in Table 32.2 below which shows change in SA conversion over time after a condition change (T = 63 °C, MeOH flow rate = 15 g/h, oil flow rate = 67 g/h). 

Static coefficient of friction, 369, 370, 377 Polyethylene, 369 Pressure treated lumber, 369 Southern yellow pine, 369 Steady shear viscosity, 639 Steady shear, 640 Steady shearing conditions, 640 Steady-state viscosity, 640 Steam explosion, 77, 84, 96, 522 Corrosion of the equipment, 96 Stearic acid, 81 Stick-slip effect, 380, 658 Sticktion, 380... 

Levonorgestrel blood plasma levels determined by radioimmunoassay showed a reasonably constant level for one year, once the initial burst subsided. However, the steady state plasma level was too low and thus a more rapidly eroding polymer was needed. To achieve a more rapid erosion, a material containing 7 wt% Mg(OH) 2 and 1 mole% copol nmerized 9,10-dihydrox) stearic acid was prepared. The detdces were again implanted into rabbits and levonorgestrel blood plasma level determined. Results of these studies have shown a much higher, satisfactory drug pltisma level (Heller, 1993). 

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