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ae Productivity
in the Pacific.
(UNCLASSIFIED) A cooperative contract,
has been
of Hawaii for research studies directed
toward the utilisation and evaluation of isotope techniques for detarmining
algal productivity in the tropical Pacific. Research wrk recently reported
indicates that the productivity of the sea can be estimated from messurenmite
of OO, fixation by sea water samples collected over a large area. These
studies are of interest in yielding significant information relating to the
mechanics, quantity, and rate of carbon being fixed through photosynthesis
by the marine algae. ‘The results are anticipated to give ea better understanding of the potential productivity of the wom sess, and te extend the development of radioisotopes as useful tools in the stadyof biclogicsl processes.
at the University of Caicago has made certain ebeervations that have in
portant implicetions in regard to the body's immunological reactions. The
relative time-pattermns of the appearance of the labelled grouge in the blood
proteinsgenerally, as compared with antibodies produced in response to injected egg albuxin, suggest that the antibedies are not formed asrely by
modification of pre-existing plasma globulins, but are synthesised independently. Furthermore, Ae appatee
that this ayntheoia begiwe almat ab anes,
after injection of the foreign
so that. considerable
has
to a current search of the various tissues te locate the antibody during the
early period of apparent latent production, Thare is alec 4 possibility
that a “pro-antibody" may thus be demonstrated,
arene in Tswoes. (UNCLASSIFIED) At the Sloanbeing
de
ments of tissue. Two of the general types af method involved are: a) Histeradlography - soft mmnochromatic x-ray beams are passed through a thin
section of tisque, and the transmitted radiation is recorded photogrephically.
The pattern of the enount of absorption, as related to wave-length, identifies
partictlar minerals in the various locations pictured; b) Fivorescense
analysis - elements within very emall bite af tissue, exposed to x-rays, absorb the raye and in turn exit lower-energy rays. the wavelengths of these
secondary rays serve to identify the elanemts r
With improved instrumentation and technical procedures, it is Likely
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that one or more of these techniques may greatly facilitate research on the
Biological role of important trace minerals.
(ORM)
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