The purpose of this.investigation was to determine how enzymes and oxygen influence the role ascorbic acid has on pigment degradation and browning during storage for strawberry juice and concentrate.
The ascorbic and dehydroascorbic acid content of blanched and unblanched, nitrogen-treated and air-exposed samples of strawberry juice and concentrate was measured...
Incipient motion of cohesive sediment and the role of flow
parameters were investigated for separate and combined unidirectional
and oscillatory flows. Sediment from Sturgeon Lake, mainly silt and
clay with organic matter, was used as bed material In recirculating
and wave flumes.
Bench-type experiments indicated that when the submerged sediment...
The causes of turbidity in impounded and released reservoir
water are studied. Seven Willamette Basin reservoirs are compared
to isolate watershed and reservoir characteristics which produce variations
in turbidity. Of the seven, Hills Creek Reservoir is examined
in detail. Particular features of the basin and impoundment are
studied to isolate...
Twenty-five gabion-type structures across the main stem and
tributaries of the Siuslaw River in the Oregon Coastal Range, installed
to expand the available spawning area for fish, were investigated for
their ability to perform gravel control functions such as trapping bedload
carried by the stream or holding gravel placed behind...
A technique is developed and tested to analyze the interaction of flowing water,
bed topography, and bedload sediment transport in meandering channels where gravel
bars are removed. The method relates the local velocity distribution, bed shear stress and
sediment transport conditions to the local bed configuration in river bends before...
Natural resource data are typically non-linear and complex, yet modeling methods often utilize statistical analysis techniques, such as regression, that are insufficient for use on such data. This research proposes an innovative modeling method based on pattern recognition techniques borrowed from the field of machine learning. These techniques make no...
The incipient motion of sediment particles in gravel-bed
rivers is a very important process. It represents the
difference between bed stability and bed mobility. A field
study was conducted in Oak Creek, Oregon to investigate
incipient motion of individual particles in gravel-bed
streams. Investigation was also made of the incipient...