WORLDWIDE EFFECTS OF ATOMIC WEAPONS
770
900
630
800
560
700
490
~
E
& 600
~
250
>
E
420 ~
E
&
0.175
0.140 —
:
700
0.20
Broken tine > daily accretion in body weight
(each large division equals 10 gm)
Calcium (gm)
1000
300
150
0.108
8
too
BIOMEDICAL CONSIDERATIONS
0.070
50
0.035
>
2
=
= 500
350 5
a
=
2
w
400
280
300
210
200
140
100
70
4
6
8
10
12
14
16
18
Age (yr)
Fig. 4—Daily accretion of calcium and strontium in humans
30
oO
2
4
6
8
10
Age (yr)
12
14
16
18
0
20
3
Fig, 3—Accumulation of calcium and strontium in humans
wa
oO
CaO (gm)
No
oS
25
transformation of cartilage to bony structure. As the bone growsin length
the deposited minerals will be found farther away from the ends of the
bone.
;
Another important aspect concerns the dynamic equilibrium of calcium
and strontium deposits in the bones, It is well known that the calcium
;
lemafntheonbioal
ssLbilbedel
bleed
i
leoud
sal
diet is inadequate. All evidence indicates, however, that this turnover and
dynamic equilibrium is not uniform for the whole bone structure. The
chief source of mobilizable calcium is in the organic matrix and the bone
trabeculae. The older mineralized bone, which forms the bulk of the bone
0
Qo
!
2
3
Months
By permission from The Physiological Basis of Medical Practice, by C. H. Best and N. B. Taylor.
nearer
rs
Fig. 5—Increasein calcium of human fetus (from Hess after Schmitz) (Ref. 2)
Strontium (mg
40