Index Catalog // ScholarsArchive@OSU

A comparison of porous polymers used in collecting organic volatiles in foods

Creator:: Boyko, Alayne Linda
Abstract:: Porapak Q, Chromosorb 102, and Tenax GC, three porous polymers commonly used as adsorbents in headspace analyses were investigated. The retention times of various low-boiling compounds relative to water were measured on the collection columns to determine which compounds would be lost during the water removal step employed after sampling...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF ALAYNE LINDA BOYKO for the degree

Porous polymer trapping for GC/MS analysis of volatile flavor compounds in corn

Creator:: Boyko, Alayne Linda
Abstract:: Flavor profiles of canned and frozen whole kernel sweet corn were obtained by entraining the volatile compounds on Porapak 0 traps and by subsequent analysis on temperature-programed, 500' by 0.03" ID capillary columns (SF-96 or Carbowax 20M). Identification was based on GC/MS data, retention indices (I[subscript E]'s) and retention times....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE iHLSIS OF ALAYNE LINDA BOYKO for the degree

Instream cover and shade mediate avian predation on trout in semi-natural streams

Creator:: Penaluna, Brooke E., Dunham, Jason B., and Noakes, David L. G.
Abstract:: Piscivory by birds can be significant, particularly on fish in small streams and during seasonal low flow when available cover from predators can be limited. Yet, how varying amounts of cover may change the extent of predation mortality from avian predators on fish is not clear. We evaluated size-selective survival...
Resource Type:: Article
Full Text:: . G. Noakes2,4 1U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station

Riverscape Patterns among Years of Juvenile Coho Salmon in Midcoastal Oregon: Implications for Conservation

Creator:: Flitcroft, R., Burnett, K., Snyder, J., Reeves, G., and Ganio, L.
Abstract:: Patterns of salmon distribution throughout a riverscape may be expected to change over time in response to environmental conditions and population sizes. Changing patterns of use, including identification of consistently occupied locations, are informative for conservation and recovery planning. We explored interannual patterns of distribution by juvenile Coho Salmon Oncorhynchus...
Resource Type:: Article
Full Text:: Biology, Western Oregon University, 345 North Monmouth Avenue, Monmouth, Oregon 97361, USA G. Reeves U.S

Managing small-acreage horse farms : for green pastures, clean water, and healthy horses

Creator:: Oregon State University. Extension Service, Stephenson, Garry Owen, and Hannaway, D.
Abstract:: The goals for a well-managed small-acreage horse farm are: A productive pasture with plenty of grass and few weeds Almost no mud during the rainy season All nutrients (manure and stall waste) generated by the horses recycled to feed the pasture or removed from the farm and recycled Healthy horses...
Resource Type:: Technical Report

Detection of the emerging amphibian pathogens Batrachochytrium dendrobatidis and ranavirus in Russia

Creator:: Reshetnikov, Andrey N., Chestnut, Tara, Brunner, Jesse L., Charles, Kaylene, Nebergall, Emily E., and Olson, Deanna H.
Abstract:: In a population of the European common toad Bufo bufo from a rural pond in the region of Lake Glubokoe Regional Reserve in Moscow province, Russia, unexplained mass mortality events involving larvae and metamorphs have been observed over a monitoring period of >20 yr. We tested toads from this and...
Resource Type:: Article
Full Text:: conservation strategies for the region. Acknowledgements. We thank K. Ronnenberg for assis- tance with figures

Flavors associated with the use of Cheddar cheese whey powder in ice cream mix

Creator:: Andrews, Matthew V.
Abstract:: Flavor problems associated with the use of cheddar cheese whey in the formulation of ice cream and other food products were investigated. During spray drying of whey, which transforms bulky liquid whey into an easily transportable and storable powder, various degrees of off-flavor development may occur depending on the care...
Resource Type:: Masters Thesis
Full Text:: , and my special friend, Alayne, for their understanding and encouragement. TABLE OF CONTENTS

Demographic and phenotypic responses of juvenile steelhead trout to spatial predictability of food resources

Creator:: Sloat, Matthew R. and Reeves, Gordon H.
Abstract:: We manipulated food inputs among patches within experimental streams to determine how variation in foraging behavior influenced demographic and phenotypic responses of juvenile steelhead trout (Oncorhynchus mykiss) to the spatial predictability of food resources. Demographic responses included compensatory adjustments in fish abundance, mean fish size, and size inequality. These responses...
Resource Type:: Article
Full Text:: steelhead trout to spatial predictability of food resources Sloat, M. R., & Reeves, G. H. (2014

The oxidative demethylation of certain N-methylhydrazines by microsomal liver enzymes

Creator:: Wittkop, Judith Anne
Abstract:: The presence in rat liver microsomes of an enzyme system which demethylates N-methylhydrazines and azo compounds to formaldehyde has been reported. Some of the compounds found to be substrates were monomethylhydrazine, N-isopropyl-α-(2-methylhydrazino)- p-toluamide and the azo derivative of the latter hydrazine. This enzyme can be classified as a mixed function...
Resource Type:: Dissertation
Full Text:: ., Portland, Oregon. Rats used in experiments weighed 250-300 g. Fr e s h pork livers were generously

The role of the geophysical template and environmental regimes in controlling stream-living trout populations

Creator:: Penaluna, Brooke E., Railsback, Steve F., Dunham, Jason B., Johnson, Sherri, Bilby, Robert E., and Skaugset, Arne E.
Abstract:: The importance of multiple processes and instream factors to aquatic biota has been explored extensively, but questions remain about how local spatiotemporal variability of aquatic biota is tied to environmental regimes and the geophysical template of streams. We used an individual-based trout model to explore the relative role of the...
Resource Type:: Article
Full Text:: food (g) 1.5×10−9 1.5×10−9 1.5×10−9 6×10−10 Benthic food (g) 5×10−7 5×10−7 5×10−7 8×10−7 Aquatic

ScholarsArchive@OSU

A comparison of porous polymers used in collecting organic volatiles in foods

Porous polymer trapping for GC/MS analysis of volatile flavor compounds in corn

Instream cover and shade mediate avian predation on trout in semi-natural streams

Riverscape Patterns among Years of Juvenile Coho Salmon in Midcoastal Oregon: Implications for Conservation

Managing small-acreage horse farms : for green pastures, clean water, and healthy horses

Detection of the emerging amphibian pathogens Batrachochytrium dendrobatidis and ranavirus in Russia

Flavors associated with the use of Cheddar cheese whey powder in ice cream mix

Demographic and phenotypic responses of juvenile steelhead trout to spatial predictability of food resources

The oxidative demethylation of certain N-methylhydrazines by microsomal liver enzymes

The role of the geophysical template and environmental regimes in controlling stream-living trout populations

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