For the past six years a bacterial infection has been the cause
of large losses of adult, spawning, American shad (Alosa
sapidissima) in the Coos, Millicoma and Smith Rivers of Oregon.
There was a sizable commercial fishery for shad in these rivers
and losses of fish due to this infection...
An investigation was made to test the method of Head on the
flow about a circular cylinder with suction. The method of Head is an
approximate method of obtaining solutions to the boundary layer equations.
The method was adapted to the digital computer to facilitate
performing the calculations, and a...
This study reports the design, construction, and evaluation of an automatic cardiac massage device and support system. The design incorporates the principle of a cardioplethysmograph operated in reverse, such that pneumatic power fed to the prosthesis will mechanically impart a massaging action to the heart. Basically, the prosthesis is a...
The problem of this thesis is to evaluate small tracts of public
domain land as to their best use in an area where the Bureau of Land
Management desires to terminate managerial responsibilities. The
area chosen is located in the Prineville District, Bureau of Land
Management and is within the...
Histones are presumed to be of chromosomal origin and provide
both structural and functional elements for chromatin. In like
manner the ribosomal proteins are of ribosomal origin and have
analogous roles. Considerable controversy over their cellular roles
exists because of the inability to compare directly both groups of
proteins. In...
Four cell lines derived from embryonic tissues of four species
of salmonid fishes, and one from a hepatoma in rainbow trout have
been established in this laboratory. The species represented are
chinook, coho, and sockeye salmon; and steelhead and rainbow trout.
All of these lines have been cultivated for approximately...
A circuit designed to generate and maintain a constant magnetic
flux is presented by using a sample-data control system, instead of a
continuous control system.
A Hall generator is used as the magnetic sensing element, and
is operated with a pulse bias to allow a large output. The output of...
The design and operation of a completely automatic trigger
circuit is presented. This circuit differs from conventional trigger
circuits in that manual control adjustments are not necessary. It
will automatically provide stable triggering over a wide range of
trigger signal amplitudes, repetition rates and waveshapes. The circuit
consists of three...
Karyotype analyses have been madeon only two on the six recognized species in the genus Pseudotsuga, Douglas-fir (P. menziesii) and bigcone Douglas-fir (P. macrocarpa). In this
study, a comparison was made between the karyotypes of Douglas-fir and Formosan Douglas-fir (P. wiloniana). The basic chromosome number of the Formosan Douglas-fir was...