The effect of 0% (all-beef) and 30% replacement of beef by hydrated
soy protein concentrate (beef-soy) on vitamin B₆ retention in meat
loaves was investigated. Vitamin B₆, moisture, fat and nitrogen contents
were determined in raw meat loaf mixtures, as well as in freshly baked,
held, chilled and microwave reheated all-beef and beef-soy loaves.
Baking time, internal temperature, weight of the loaves, and volume and
weight of the drip were recorded. Retention of vitamin B₆ and heating
losses of the all-beef and beef-soy loaves were calculated, based on
the raw meat loaf samples.
The beef-soy loaves required less time than the all-beef ones to
reach an internal temperature of 74°C in a 177°C oven. Compared to the
all-beef loaves, the weight of the beef-soy loaves was higher (P<0.05)
and the volume of the drip was lower (P<0.05). The all-beef and beef-soy
loaves were similar in fat and nitrogen content. Microwave reheating
lowered (P<0.05) moisture in both all-beef and beef-soy loaves.
Retention of vitamin B₆ in the all-beef and beef-soy loaves was
affected by treatment. In freshly baked loaves approximately 91% of
the vitamin B₆ was retained in the all-beef loaf, and 97% in the beef-soy
ones. Additional losses of vitamin B₆ occurred during holding at
95°C for one hour followed by 70°C for 15 minutes: all-beef and beef-soy
loaves, respectively, retained 80 and 89%. For the all-beef and
beef-soy loaves, respectively, 88 and 94% of the vitamin B₆ was retained
after chilled storage at 2.8°C for 24 hours; and 89 and 98% with microwave
reheating for four minutes. For the freshly baked and held all-beef
loaves, 4.3 and 5.7% of the vitamin B₆, respectively, was transferred
to the drip; and for the beef-soy loaves 0.6 and 0.8% of the vitamin B₆
was recovered in the drip. / Graduation date: 1982
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/25994 |
| Date | 03 September 1981 |
| Creators | Li, Yu-tsuan |
| Contributors | Miller, Lorraine T. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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