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Pigment and lipid oxidation was investigated in fresh ground sirloin from control and vitamin E-supplemented (370 I.U./head/day) Holstein steers. Alpha-tocopherol levels were higher (PcO.05) in muscle from supplemented animals than from controls. During 6 days storage at 4"C, metmyoglobin accumulation and lipid oxidation (TBA) were grcatcr (PcO.05) in beef from control versus supplemented animals. TBA value and % metmyoglobin were highly correlated in the control (r=0.91) and supplemented (r=0.72) groups. TBA values of cooked sirloin slices subsequently stored for 2 days at 4"C, and for frozen ground sirloin patties stored at -18°C for 1.5 and 3 months, were lower (P~0.05) in beef from supplemented animals than from controls. Meat which contained in excess of ca. 0.3 mg a-tocopherol/lOO g tissue displayed the least oxidation of both pigments and lipids.

Supplementary alpha-tocopheryl acetate (vitamin E) was fed to provide none (E0), 2,000 IU/d (E2000), 5.8 IU/kg live weight (E5.8), or 8.6 IU/kg live weight (E8.6) to steers that were individually fed mainly a corn diet. Three steers were placed on each of 10 treatments: E0, E2000, E5.8, E5.8 to d 126 then E0 to d 266, E0 to d 126 then E5.8 to d 266, E8.6, grazing followed by either E0 or E8.6 all with Holstein steers; and E0 and E2000 with crossbred beef steers. During the last 100 d, vitamin E consumption (International Units/day) averaged 96 for E0, 1,840 for E2000, 2,520 for E5.8, and 3,610 for E8.6. Concentrations of alpha-tocopherol in plasma and in liver and longissimus lumborum biopsy samples obtained every 42 d were elevated (P < .01) by vitamin E supplementation. Tissue saturation was approached at these vitamin E intakes causing similar incorporation of alpha-tocopherol with both per day and per BW supplementation strategies. Maximum accretion or depletion of alpha-tocopherol in plasma and liver occurred before 42 d, but accretion required 120 d and depletion required 180 d in longissimus lumborum. Vitamin E supplementation elevated (P < .01) concentrations of alpha-tocopherol in liver, lung, subcutaneous fat, omental fat, perirenal fat, kidney, diaphragm, spinal cord, longissimus lumborum, and plasma at slaughter with maximum accretion achieved (P < .01) in lung, subcutaneous fat, kidney, diaphragm, and spinal cord. Depletion was not achieved in longissimus lumborum and spinal cord (P < .01), subcutaneous fat (P < .06), and perirenal fat (P < .08) within 140 d. Vitamin E inhibited (P < .01) oxidation at the surface and center of longissimus lumborum steaks displayed for 19 d. Lipid oxidation occurred throughout E0 steaks, but metmyoglobin accumulation occurred more rapidly (P < .01) on the surface than in the center. Myoglobin and lipid oxidation were not concurrent events. Supplementation with vitamin E increased (P < .01) alpha-tocopherol concentrations in longissimus lumborum fractions (mitochondria, microsome, cytoplasm, connective, and remainder) but, except for connective tissue, the proportional distribution of total longissimus lumborum alpha-tocopherol was not affected (P > .1) by vitamin E supplementation. Vitamin E supplementation for at least 44 d at 1,300 IU/d is expected to incorporate adequate amounts of alpha-tocopherol into muscle (3.3 micrograms/g for longissimus lumborum) to produce beef with extended color and lipid stability.

Research has found that employee suggestion systems are a useful way to obtain and utilize employees' creative ideas. To be effective, employees must be motivated to think creatively and to participate in the suggestion system. Unfortunately, motivating employees to participate is a common weakness of suggestion systems. Motivating employees involves more than simply offering rewards to submitters if their suggestions are put to use. According to expectancy theory, rewards will only motivate behaviour if the rewards are valued, if they are closely linked to successful performance, and if employees believe that they can perform successfully. This paper applies expectancy theory to the problem of motivating employees to participate in a suggestion system. We describe suggestion system technology that will increase employees' motivation to think creatively and participate in the system.

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