CHANGES IN FRESH BEEF DURING COLD STORAGE. 
17 
Table 4. — Composition of 0.9 per cent sodium chlorid extract of meat expressed 
in terms of percentages of moisture-free and fat-free material. 
-d 
i 
> 
d 
Nitrogen. 
Phosphorus. 
d 
^d 
OB 
o 
d 
'3 
6 
Description of sample. 
a 
3 
03 
c3 
^ 
3 
2 
3! 
"3 
■§ 
<0 d 
s 
'A 
3 
fcX) 
C3 
O 
O 
W 
A 
1 
6j0 
8 
1/3 
o 
"3 
2 
o 
o 
§ 
in 
O 
o ■ 
6 
s 
6 
"3 
O 
o 
03 
3 
GO 
CO 
H 
< 
O 
<! 
H 
o 
'A 
£h 
< 
H 
02 
CO 
Hours. 
100 
Semimembranosus muscle 
48 32. 73 
5. 08 
27.65 
3.77 
4.38 
2.36 
2.02 
0.125 
0. 3940 
0. 733 
0.475 0.S 
101 
48^32. 95 
^ 90 
97.751.3. 46 4. 36 
9 49 
1.94 
.107 
.3977 
.714 
.440 
.274 
102 
Vastus externus muscle 
4829.83 4.65J25.18l3.49i3.96 
2.07 
.109 
.3768 
.696 
.461 
.235 
103 
Semitendinosus muscle 
48' 32. 06 
1.82 27.24 3.54 4.49 
2.48 
2.01 
.085 
.3835 
.735 
.475 
.260 
101 
Rectus femoris muscle 
48 29. 62 
4.48 25.14 2.99 3.85 
1.99 
1.86 
.070 
.3971 
.694 
.483 
.211 
Table 5. — Distribution of nitrogen and phosphorus, expressed ai 
total nitrogen and total phosphorus. 
percentages of 
-d 
Nitrogen. 
Phosphorus. 
d 
o 
d 
•g 
Description of sample. 
03 
d 
% 
"3 
O 
o 
o 
© d 
bO 
o 
£■ 
2 
ft 
O 
CO 
"3 
o 
Eh 
d 
m 
3 
"3 
9P 
o 
O 
03 
c/3 
O 
03 
o 
6 
.3 
a 
a 
o 
a 
a 
o 
Eh 
2 
d 
CO 
^J bJO 
O 
CO 
o 
CO 
Hours. 
100 
Semimembranosus muscle. 
48 
100.00 
28. 53 
15.37 
13. 16 
0.814 
2.57 
0.244 
100.00 
20.19 
79.81 
51.73 
28.08 
101 
Biceps lemoris muscle 
48 
100. 00 
29. 52 
16.3S 
13.14 
.724 
2. 69 
.266 
100. 00 
22.67 
77.33 
47. 65 
29.68 
1(12 
Vastus externus muscle. . . 
48 
100.00 
26.87 
14.04 
12.83 
.739 
2. 56 
.225 
100.00 
21 . 83 
78.17 
51.80 
26.37 
103 
Semitendinosus muscle 
48 
100.00 
29. 62 
16.36 
13.26 
.561 
2. 53 
.276 
100. 00 
20. 28 
79.72 
51. 53 
28.19 
104 
Rectus femoris muscle 
48 
100.00 
26.42 
13. 66 
12.76 
.480 
2.73 
.263 
100. 00 
21.27 
78.73 
54.75 
23.98 
CHEMICAL CHANGES TAKING PLACE DURING ASEPTIC AUTOLYSIS OF BEEF. 
Tables 6 to 11, inclusive, show the chemical changes which took 
place in 9 samples of the muscular tissues from a hind quarter of a 
steer that were incubated at 37° C. for periods ranging from 7 to 
100 days. 
Table 6 shows the composition of the tissue expressed in terms of 
percentages of the original material. On account of variations in 
the moisture content of the samples, due to losses by evaporation 
during incubation, and because of appreciable variations in the fat 
content of the samples, the data do not show the true extent of the 
changes which took place in the composition of the material during 
autolysis, a better comprehension of which may be obtained from 
Table 7, which shows the composition of the samples expressed in 
terms of moisture-free and fat-free material. 
Moisture, fat-free oasis shows a fairly regular decrease as the 
period of incubation increases, the sample incubated 100 days con- 
taining 72.64 per cent, as compared with 76.61 per cent in the fresh 
material. 
56861°— Bull. 433—17 2 
