A study was made to evaluate the effect of different rates of N
fertilization on Nugaines wheat. The variable N treatments provided
different N regimes as a basis for evaluating potential diagnostic
tests for assessing the N status of the wheat plant. The crop was
grown in Lane county during...
The entire human population is chronically exposed to various
contaminants, including lead and chlorinated hydrocarbon pesticides.
Studies were undertaken to assess the effects of chronic exposure to
lead on the toxicities of two such pesticides, lindane and dieldrin.
Mice were given lead as the acetate in drinking water, at levels...
This is the first volume of a new publication replacing the Research Briefs and the Contribution series. It follows Volume 13, Number 1 of the Research Briefs and Contribution Number 29. Frequency of publication of this series will depend on the number and size of acceptable manuscripts submitted to the...
The effect of X-irradiation on DNA synthesis in larval salivary
glands of Drosophila hydei was studied using the technique of liquid
scintillation spectrometry and autoradiography. DNA synthesis in
salivary glands of synchronized larvae was measured at successive
stages of third instar development by in vitro uptake of ³H-thymidine
for a...
Biochemical studies of phenylmercuric acetate (PMA) and
mercuric acetate toxicity in rats carried out during this investigation
were (1) the metabolism of ²⁰³Hg(Ac)₂ and ²⁰³Hg-PMA within kidney and liver tissues following oral
ingestion,
(2) the effect on some
soluble enzyme activities and determinations of ²⁰³Hg binding in the
enzyme fractions,...
Evaluations of body form and measures of milk production were
recorded for 188 Holstein lactations and 77 Jersey lactations in the
Oregon State University Dairy Herds. Components of body form
included general appearance, dairy character, body capacity, and
mammary system and 34 sub-components of these four traits plus body
weight...
This analysis concerns the life and scientific work of Henry
Augustus Rowland (1848-1901), organizer and the first chairman of
the physics department at The Johns Hopkins University in 1876.
Special materials used in this research included three pieces of
Rowland's experimental apparatus which are extant in the Smithsonian
Institution Division...
Phospholipids and cerebrosides of the normal chick sciatic
nerve were extracted by Folch procedures and separated with silica
gel thin-layer chromatography using various chloroform-methanol
solvents. The subsequent chemical assays were expressed as a function
of the developmental stages of the chick from 15 days of incubation
to 7 days after...
The pea crab Fabia subquadrata is frequently found as a symbiont
of mussels, living within the mantle cavity. This study examined
the nature of this symbiotic relationship by recording the pattern
of distribution of individuals in a mussel bed, testing responsiveness
to host secretions, and observing the feeding mechanics and...