LIFE SCIENCES
Dec. ad
15,-1971
%
relationship in the low dose region, In barley it was shown that
irradiation during meiosis caused a considerably higher induc-
55194
i970,
65195
boat
A very brief summary of one attempt to obtain surface contamination levels ag based on possible radiation doses to people is
presented, The models used are crude and require refinement
: Sjoedins’ 5an’ (Swedish Seed Association, Svaloef, Sweden),
iHereditatl,68: No.1; 1434(1971). boas
i K ‘total of198 Yransidcations have been induced in Vicia faba
both in detail and in study of the individual factors involved. They
»‘L. with toniztig radiations and chemiGal mutagens. The ionizing
do however indicate the posstbility of more refined study of the
possible impact of contamination and they open the dcorto consideration of very valuable studies of an applied health physics
nature which will greatly expand understanding of the possible
problems of control, In particular, it is emphasized that the
numerical values obtained should be used only as guides to the
professional in investigating particular cases and in establishing
7 radiations were about five times niore effective in inducing trans»Jocations as Gérapared with fhe chémical mutagens. In all, 109
‘translocations werd Analysed. These studies revealed that the
points aré not randomly distributed over the
yphtombsomeshér'within tidividual chromosomés! Chromosomes
2,;"abd5 displayed a significantly lower aberration frequency
l{mits of sensitivity for routine monitoring. The prospect for de-
ant the other.thrée chromosomes, Quadrivalents in translocation
riving general contamination limita for use in release of materials and equipment seems discouraging at the moment because of
the lack of definition of the many places these inaterials can go,
the uses to which they are put, and the quantities so moved. It is
possible, however, that detailed study of these factors, along with
the transfer coefficients, could lead to acceptable models for many
situations which could lead to the development of acceptable standards, (auth)
theterodygotes ‘weté mostly characterized by a mixture of rings -
nand chains. fhe average pollen fertility was 56 percent. Gametes
x and zygotes of translocation homozygotes were fully viable ex+
ept in alx translocation lines, in which they were semi-lethal.
| Vegetative growth was slightly depressed compared with the pa-
x rental variety Primus; but the.peed yield was reduced by 25
percent. | No differences between extreme tranalocations and
y others”“were detected as regards plant vigour. In the F, offspring:
got crosses between translocations involving the same two chromoomes,,the,{translocations behaved differently when compared with
55196
a much higher frequency fn Vicia jaba. Only when the breaks
oe th the same atin‘ in both chromosomes, and thenin rather
bloge proximity, were six bivalents formed, (auth) he
a65192 © “DYNAMics OF MrrOTIC ABERRATIONS inDUCED IN
Anaastasiu, Gh,;
* Cilievici, O. ‘Arch, Roum. Pathol, Exp Microbiol;29: No, 1-2,
"S.81-9(1970),
cra
through the skin. Estimates of the levels for transfer to the home
white: Wistar rats were exposed to a single dose of 890 R. The .
* atudy involved determination of the mitotic index, mitotic and
.
*ehromesomal aberrations and a 60-day observation period of the -
Readings on several of the more common types of instruments
used to measure surface contamination are then derived. Appen-
. -caryotype, at various time intervals, A single 800 R dose inhibited
.jcell divigién, led to aberrant mitoses and multiple chromosomal ~
dices to provide background data on specific subjects include
*, polyploidy. Starting with the 15th day, however, the natural re- | & storing mechanisms interferred, tending to bring the mitotic index
Appendix C, Resuspension. All derived values for the decision
levels for individual isotopes are given in Appendix D. (auth)
, aberrations such as: ruptures, translocations, agglutinations, and
Appendix A, The Skin; Appendix B, Beta Dose to The Skin; and
& in the normal range; to eliminate aberrant mitoses and chromo~
65197.
Ferns
- femal aberrations. (Rom. Sct.oe % SR(4 “tibia ay
. DETERMINATION OF 2pu AND ENRICHED URANIUM
IN THE URINE IN THEIR COMBINED PRESENCE. Golutvina,
thet agi 3
he. vy teal eMae
M. M.; Stepanov, A. P.; Sadikova, N. M.; Blinov, A. P. _ Med.
- Radiol.; 16: No. 9, 46-9{Sep 1971).° (in Russian).
A method based on the destruction of tests by boiling with nitric
acid and hydrogen peroxide, and concentration of isotopes by prero* Heer’also to abstracts $494 7$4962! #4964, $4966, *Ga967,515 eo
&
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.pipitation
and subsequent extraction with precipitates of bismuth
“ * ees ge et,
4
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eg
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ern en
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we Paty es
<'Health:Phyéics: and Satety” cas oo
c Physick Society Midyear Topical Symposium, Idaho Falls, Idaho,« t
x: November8-6, 1970. «.Voilleque, Paul G.;’Baldwin, Burton R.
ate
te
~ (comps,j.% Idabo Falls, Idaho; Burton R, Baldwin, Publications ~*#‘;ihe
* phosphate (*?Pu) and lantan fluoride (enriched uranium) is pro- '/*
posed, Id conclusion, mixing of precipitates with a fluorescent
compound and measurement of their radioactivity in a layer of
hard scintillator are done, The efficacy of registration of alpha-
particles comprises 90to 95%. (auth) .
oe
we
T
Sea
{Chairman {1971}, 256p. . (CONF=701106-(Vol, 3)).*
Lipa et ss199 - MISUSE OF THRESHOLD Litirt VALUES. " Major, a.
Seventeen articles are {ncluded; separate abstracts were ‘pre= 2 ", (Untv. of Sydney). . Health Phys.; 21:° No. 4, 611(Oct 1971). 3.
tis pointed outthat Cohen misuged the concept of Threshold .,
#. Pared for 18. One article on reasons fordifferences tno calculated*
5 S6timates of the cloud duse Was previously Lncluded in NSA ag 25: —
| Limit Values in his recent publication(Health Phys. 19: 637(1970)).
>, 8668, ‘The remaining article of basic data on heat diss[pation down- |4 " It ia hoped that intended users of this concept would read the -.,.
stream for large beat sources:was nat jnacobe for NSA.(P.C.H,y.
% Forjbstraéts ofindividual“papers. See: $4547, 54796, ‘64 797,.
55125, $5762, 65188, 55201. 55202, 55241, 55242, 55253, 09254,
55547, 56984, and $7131, pe,
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‘ ‘preface of the American Conference af Governmental Industrial . ;¢
* Hyglenista in which it is stated ‘‘that these Umits are intended
: for use {n the practice af industrial hygiene’ and may not be
‘used for ‘‘the establishment of standards for radionuclides in a
, natural gas supply’*.
(UK)
wea
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‘
Rad:‘pddtive Contamination‘ond"Decontamination. oe
. “ “§5199 - ‘ PUBLIC HEALTH ASPECTS OF 1237 FROM tHE NU»
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:Refer afae'to‘abstrdet¢#isae54788, “Bars's, ‘sa%62, 54993, 54228,
S463, S57, $5118, 55749, 56151, 55154, andl 505.82.
ce ee,
mune.
PLEARPOWER INDUSTRY.
Russell, John L,
(Public Health
‘Betvice, Rockville, Md.j¢ Hahn, Paul B. pp 241-51 of Health
: Physics Aspecta of Nuclear Facilty Siting. Vol.I. /Vcilleque,
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85199 - HEA LTH ‘PHYSICS ASPECTS OFNUCLEAR FACILITY: “*
ar SITING. S“VOLUME IIL, «+ Proceedings of the Fifth Annual Health +.
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SURFACE CONTAMINATION: DECISION
are based on these mechaniems plus direct external radiation and
resuspension using plausible transfer coefficients. The relation
of these transfer levels to tranafera to other areas is discussed.
i With a view to:atudying cell’ division in the emur bone marrow,
a
(LA-4558)
LEVELS, Healy, J, W. (os Alamos Scientific Lab., N, Mex,.),
Sep 1971, Contract W-7405-eng-36, 1115p. Dep. NTIS,
Levels of contamination are derived for over 180 isotopes for
the skin and clothing of workers and individuals in the general
public as based on the National Council on Radiation Protection
and Measurements (NCRP} recommendations on dose limitation.
These levels consider the dose to the skin, the possible inhalation
or ingestion of the deposited material, and possible absorption
barley:and Zea thays translocations— i/e., quadrivalents occurred
>THE WHITE RAT BY A SINGLE DOSE OF 800 R,
Healy, John W,
facilities: Golden, Colo. @3 Apr 1971),
485191 © nibucED TRANSLOCATIONSIN VICIA FABA L.
translocation break
APPROACH TO PLUTO-
(Los Alamos Scientific Lab., N, Mex.), 15 Apr 1971,
From Rocky Flats symposium on safety in plutonium handling
roa
ay
(CONF-710401-, pp 352-64)
NIUM SURFACE CONTAMINATION LEVELS,
‘pollen graingcomposing more hark 30,G00 pollen samples.
Beg
Dep, NTIS (U, S, Sales Only),
clear Association; Toronto, Canada (24 May 1970),
The biological significance of radioactive rcleases to the en-
’ fixing days.- Regardless of the way in which the dose-effect reylationship wak computed it was shown to be Ilnear. The entire
"investigation comprised the analysis of more than 40 milllon
:
(CONF-700564-12),
vironment by the nuclear industry is discussed. The past record
of the industry is mentioned and the significance of natural radioactivity and biological concentration processes in the human food
chain is estimated. Radioactive releases from Canadian reactors
are summarized. (E.R.B.)
_ ‘one dose-effectarelationship for the average mutation of flve
woe by
12p,
From tenth annual international conference of the Canadian Nu-
;secutive days was observed. This constitutes a complication for
the determination of the dose-effect relationship. This complication was circumvented by constructing one dose-effect relationship for the maximum mutationrate of each plant, as well aa
(auth) -
BIOLOGICAL SIGNIFICANCE OF
RADIOACTIVE RELEASES TO THE ENVIRONMENT, Marko,
A, M, (Atomic Energy of Canada Ltd,, Chalk River {(Ontario)),
tion of waxy mutants than during subsequent developmental stages.
Furthermore, the amount of mutants was shown to be dependent
_on the height of tiller at irradiation and on the spikelet position
within the spike. In maize a pronounced difference in mutation
rate of the pollen grains from individual plants fixed on five con-
EP M
(70-CNA-641)