de
Alba, A. Fernando; Brody, T. A.; Lezama, H.3 Tejera, Acs
and Vasques, Barete MN.
PRECIPITATION.
(1957)
(In Spanish).
SECOND REPORT ON RADIOACTIVE
8. 97-10%
Data on radioactive precinitation obtained during ths
‘period from September, 1956, to February, 1957 using the
methods Gescribed in the previous report are presenced.
2.
Amano, Keishi; Tosawa, Harumi; and Takase, Akira.
RADIOACTIVITY IN CERTAIN PELAGIC FISH. IV.
AND CONFIRMATION OF RADIOIRON IN SKIPJACK.
SEPARATION
Nipnoon
SuisangakuKaishi 21, 1261-8 (1955-56).
Incinerated liver (0.2g.) and stomach (0.15g.) of a
skipjack caught near the Bikini Atoll on June 19, 19%,
were dissolved in 0.2N HCl, filtered, and the filtrates
made up to 100 cc.; the radioactivities were 130 and 86
counts/min./cc., respectively.
ed throvgh column of Dowex 50.
The solutions were pass-
Elution with 0.5% oxalic
acid gave powerful radioactivity with liver, but very
weak with stomach. Elution with a solution of NH,
citrate at pH 3.5 from both samples showed s fons radioactivity, probably due to the presence of Zn°). Distinct radioactivity was also detected in the NHk citrate
eluate at pH 4.1 from the liver, but not from the stom-
ach} this eluted element emitted no
from Zn°’. The elution behavior of
y-rays and differed
the radioactive
element in the 0.5% oxalic acid elution showed that it
was Fe; elution by 0.6M HCl after aggorption to Dowex 1
supported this result.
2Zr95 and Nb9?
were indicated from
these data to be absent. The pulse height distribution
curve of y-ray emitted by the element also indicated
that it was Fe. However, the radiggion decay curve differed considerably from that of Fe/7, suggesting the
presence of radioactive element with longer half-life.
Comparison of the absorptiop coefficient of Al, Ag, and
Au for x-rays from Fe55, N1©3 and
the isolated element
indicated that the element was Fe).
3.
Anderson, E. C.3 Schuch, R. Ley Fisher, W. R.3 and
Van Dilla, M. A.
BARIUM-140 RADIOACTIVITY IN FOODS.
Science 127, 283-4 (1958).
Bal*O was observed in deer and cattle in the summer of
1956, presumably the result of nuclear tests. However,
no commercial beef was found to be contaminated.
In
the months of June, July, and August of 1957 the isotope
appeared in milk samples in the United States.
The
dates and concentrations of Bal+0 in powdered miik is
summarized for those locations at which the Bal
y activity exceeded that of natural K*O.
1