The genome composition and DNA base sequence homologies
of several diverse species of fish were examined. The fishes were
characterized from spectrophotometric studies of reassociation and
hybridization of their DNAs and from the thermal stabilities of hybrid
duplexes.
Spectrophotometric studies indicated that repeated sequences
comprise 35-40% of the genomes of...
An attempt was made to differentiate between runs of steelhead by comparing the reassociations of their DNA. Conditions for the reassociation were studied using E. coli DNA, and observations
were made spectrophotometrically. Of the five buffers examined, 1.0 molar sodium perchlorate plus one-hundredth molar tris-HCl, pH 7.1, at 60° or...
In spite of the progressive restrictions of the commercial river fishery during the past fifty years, the trend of the salmon populations of the coastal rivers has been downward. It is almost impossible to isolate and analyze separately the causes of this decline, and any attempt to saddle one factor...
1. Genetic tools are commonly used for conservation and management of at-risk species. Individuals are often sampled from mixtures that are composed of many populations, which creates a need to assign individuals to their source. This can be problematic when the genetic divergence among source populations is weak but can...
Nitrogen deficiency during the winter where winter wheat
(Triticum aestivum L.) follows wheat and large amounts of straw
have been plowed down has been a factor limiting yield in the
Willamette Valley of western Oregon. Field experiments were
established to determine if an application of N on the stubble or...
A feedlot cannot retain its manure byproduct indefinitely.
Eventually some method of disposal must be used. A case study
approach to this problem confronting a cattle feeding operation
representative of those in the area was used to determine volume
relationship among different product forms in order to maximize
net revenue...
A computationally efficient algorithm has been developed for
determining exact or approximate solutions for large scale generalized
fixed charge problems. This algorithm is based on a relaxation
of the Benders decomposition procedure, combined with a linear
mixed integer programming (MIP) algorithm specifically designed to
solve the problem associated with Benders...
The event-scale variability of across-shelf transport was investigated using observations made in 15 m of
water on the central Oregon inner shelf. In a study area with intermittently upwelling-favorable winds and
significant density stratification, hydrographic and velocity observations show rapid across-shelf movement of
water masses over event time scales of...