Index Catalog // ScholarsArchive@OSU

Selected life history aspects of American shad (Alosa sapidissima) and predation on young-of-the-year shad in Lake Umatilla of the Columbia River

Creator:: Stainbrook, Cris Eric
Abstract:: Selected life history aspects of American shad, Alosa sapidissima, collected in Lake Umatilla of the Columbia River during 1980 and 1981 were examined and compared to other shad populations. Mean fork lengths of adult shad captured in 1981 were 405-, 415- and 423-mm for age III, IV and V males;...
Resource Type:: Masters Thesis
Full Text:: approved: Dr. Richard A. Tubb Selected life history aspects of American shad, Alosa sapidissima

Winter ecology of juvenile coho salmon (Oncorhynchus kisutch) in modified and unmodified sections of a coastal stream

Creator:: Phillips, Stephen H. (Stephen Homes), 1957-
Abstract:: Natural and gabion modified habitats containing coho salmon (Oncorhynchus kisutch) were observed and measured seasonally in East Fork Lobster Creek, a fifth order stream in western Oregon. Coho salmon usually inhabited backwater and secondary channel pools in winter. Large wood debris complexes and undercut banks were the primary sources of...
Resource Type:: Masters Thesis
Full Text:: Privacy Richard A."Tubb, in charge of major Redacted for Privacy Richard A. Tubb, Head of apartment of

Interactions of organic input types and water quality on the production of Oreochromis niloticus (Linnaeus, 1757) in Rwandan ponds

Creator:: Rwangano, Félicien
Resource Type:: Masters Thesis
Full Text:: . Richard A. Tubb, my major professor and Head of the Department of Fisheries and Wildlife, for his

Oxygen consumption during acclimation to increasing salinity in the freshwater euryhaline cichlid Oreochromis niloticus (Linnaeus, 1757)

Creator:: Alablani, Salam A.
Abstract:: Two sets of experiments measured changes in the oxygen consumption of the euryhaline teleost Oreochromis niloticus during acclimation to progressively increased salinity. Six acrylic respirometers were constructed for this purpose. The salinities tested were 9, 18, 27 and 36 ppt, with 36 ppt considered as full strength seawater. Fish were...
Resource Type:: Masters Thesis
Full Text:: A. Tubb Two sets of experiments measured changes in the oxygen consumption of the euryhaline

Microhabitat utilization by juvenile chinook salmon (Oncorhynchus tshawytscha) in relation to stream discharges in the lower American River of California

Creator:: Jackson, Terry A.
Abstract:: Habitats for juvenile chinook salmon (Oncorhynchus tshawytscha) were observed at a high flow during the spring of 1989 and at a low flow during the spring of 1991 in the lower American River of California. Parameters of microhabitats in eight macrohabitats were measured. Mean column water velocity and total water...
Resource Type:: Masters Thesis
Full Text:: : Richard A. Tubb Habitats for juvenile chinook salmon (Oncorhynchus tshawytscha) were observed at a

Effect of ageing errors on estimates of growth, mortality and yield-per-recruit for the Chilean sardine (Sardinops sagax)

Creator:: Garland, David Ernest
Resource Type:: Masters Thesis
Full Text:: (Sardinops sagax). Abstract approved: Richard A. Tubb Ageing errors produce important changes in the

Growth and reproductions of Oreochromis niloticus (L.) in tropical aquatic microcosms at fluctuating temperature regimes

Creator:: Rwangano, Félicien
Resource Type:: Dissertation
Full Text:: Fluctuating Temperature Regimes Abstract approved: Richard A. Tubb The effects of fluctuating

Infection, histopathology and migration of Anisakis sp. (Nematoda:Heterocheiloidea) in Pacific herring (Clupea harengus pallasi) from Yaquina Bay, Oregon

Creator:: Hauck, Arthur Kent
Resource Type:: Masters Thesis
Full Text:: : Richard A. Tubb Infection, histopathologic, and migration studies of Anisakis sp. larvae Dujardin, 1845

Effects of salinity on the tolerance, growth, food conversion and oxygen consumption of kelp greenling (Hexagrammos decagrammus)

Creator:: Zahr, Camille Reda
Abstract:: The osmoregulatory capabilities and tolerance of Kelp greenling, Hexagrammos decagramrnus, were studied in a series of seven salinities ranging from fresh water to concentrated sea water of 50 ppt. Results indicated that they were tolerant over a wide range of salinities but were incapable of surviving below 5 ppt and...
Resource Type:: Masters Thesis

Relationships of the freshwater naiad Margaritifera margaritifera falcata to some fishes of the Willamette River

Creator:: Chesnutis, Edward Joseph
Resource Type:: Masters Thesis

Estimation of chronically safe zinc concentrations with steelhead trout (Salmo gairdneri) emphasizing ventilatory responses

Creator:: Cairns, Michael A.
Resource Type:: Masters Thesis
Full Text:: approved: Richard A. Tubb A 96 hr toxicity test, measuring ventilation rate, was developed to estimate

Fish acclimation and the development of tolerance to zinc as a modifying factor in toxicity

Creator:: Anadu, Donald Igwegbe
Resource Type:: Dissertation

The effects of copper on predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex

Creator:: Rohm, Christina M.
Abstract:: Total copper concentrations of 10 [mu]g/l to 100 [mu]g/l appeared to alter the predator-prey interactions of fathead minnows (Pimephales promelas) and Daphnia pulex. The effect of copper concentration on the total amounts of D. pulex consumed over a 12-h period varied with the density of prey stocked hourly in the...
Resource Type:: Masters Thesis

The effects of dietary algal and lipid supplements on the gonadal and larval development of Crassostrea gigas kumamoto (Thunberg)

Creator:: Robinson, Anja M.
Abstract:: Under laboratory conditions, elevated temperatures accelerated production of gametes. However, when conditioning for spawning at elevated temperatures was initiated early in the season (January-March), larval survival and number of spat collected were significantly lower than when conditioning was initiated in may or June. At elevated temperatures, broodstock oysters were fed...
Resource Type:: Dissertation

A comparison of drift from hooded and open-boom agricultural sprayers

Creator:: Fehringer, Ronald J.
Abstract:: A recent development in drift-control for agricultural ground sprayers is the installation of a hood (or shroud) over the boom. Hoods are designed to provide a protected zone in which droplets can be sprayed and deposited on the target with limited interference from the wind. This study compared chemical drift...
Resource Type:: Masters Thesis
Full Text:: possible. First, thanks to Dr. Richard Cavaletto for bringing me aboard on this project, and for being a

Food as a source of nitrosatable amines

Creator:: McIntyre, Timothy
Abstract:: Beer, nonfat dry milk, fried bacon and microwave baked fish were treated under simulated gastric and extreme nitrosation conditions to estimate their capacity for generation of endogenously formed N-nitrosamines. The level of nitrosamines in beer increased from 0.1 ppb N-nitrosodimethylamine to 0.4 ppb N-nitrosodimethylamine (p < 0.05) under simulated gastric...
Resource Type:: Masters Thesis
Full Text:: to thank Dr. Richard A. Scanlan, his major advisor, for providing this opportunity and for the

Analysis of N-nitrosamines and nitramines in foods and herbicides

Creator:: Hotchkiss, Joseph H.
Resource Type:: Dissertation
Full Text:: ^. ) ^a, fj. : Ab stract approved: (R. A. Scanlan) A method to both estimate the volatile N

Formation of N-nitrosamines from the nitrosation of spermidine and spermine

Creator:: Hildrum, K. I. (Kjell Ivar), 1940-
Abstract:: The reactions between sodium nitrite and the polyamines spermidine and spermine were investigated. When reacted at 80°C for 1 hr at pH 3.5 with a 1:3 molar ratio of amine groups to sodium nitrite, five volatile nitrosamines were identified as products in the nitrosation of spermidine. 3HC1, and two volatile...
Resource Type:: Dissertation
Full Text:: NITROSATION OIuSPERMIDirjff AND SPERMINE Abstract approved: / R. A. Scanlan The reactions between

Determination of selected secondary and tertiary amine alkaloids in barley malt

Creator:: Poocharoen, Boonthong
Abstract:: The malt alkaloids N-methyltyramine, N,N-dimethyltyramine (hordenine), N-methyl-3-aminomethylindole and N,N-dimethyl-3-aminomethylindole (gramine) are known precursors for N-nitrosamines. Analytical procedures were developed and applied to extract and quantify these alkaloids from malt, green malt, malt roots, and raw barley. A ground malt sample under nitrogen atmosphere was extracted with 5 percent concentrated ammonium...
Resource Type:: Dissertation
Full Text:: . A. Scanlan The malt alkaloids N-methyltyramine, N,N-dimethyltyramine (hordenine), N-methyl-3

Formation of Bis(hydroxyalkyl)N-nitrosamines as products of the nitrosation of spermidine

Creator:: Hotchkiss, Joseph H.
Abstract:: The purpose of this study was to characterize the nonvolatile, water soluble, bis(hydroxyalkyl)N-nitrosamines produced from the reaction of spermidine and nitrite. The biologically occurring polyamine spermidine was reacted with nitrite in the presence of acid. The reaction products were isolated and converted to trimethylsilyl (TMS) derivatives. The derivatized products were...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ^^ ^ l ' l /Ml. A. Scanlan The purpose of this study was to characterize

Determination of dimethylamine in barley malt

Creator:: Yoo, Lee-joung
Abstract:: Dimethylamine (DMA), in addition to the alkaloids hordenine and gramine, has been suggested as a potential precursor of nitrosodimethylamine (NDMA) in malt. Analytical procedures were adopted and applied to extract and quantify DMA from malt, green malt, malt roots and raw barley. Ground malt was extracted at room temperature with...
Resource Type:: Masters Thesis
Full Text:: of Dimethyl ami r\g in Barley Malt Abstract approved: ^ ^ R. A. Scanlan Dimethylamine

Carcinogenicity and acute toxicity of dimethylnitrosamine in rainbow trout (Salmo gairdneri)

Creator:: Grieco, Mary Porter
Abstract:: A dose related carcinogenic response was established for dimethylnitrosamine administered in the diet of rainbow trout (Salmo gairdneri). An equation was derived for the relationship between dose and hepatocellular carcinoma incidence. From a published dose response study using Porton rats as a test animal, a second equation was derived for...
Resource Type:: Masters Thesis
Full Text:: : f , Dr. Richard A. Scanlan A dose related carcinogenic response was established for

Identification and quantitation of 3-hydroxy-N-nitrosopyrrolidine in fried bacon and fried-out fat

Creator:: Lee, Jae-sung
Abstract:: The formation of 3-hydroxy-N-nitrosopyrrolidine from decarboxylation of 4-hydroxy-N-nitrosoproline was demonstrated in model heating system designed to simulate the conditions of frying bacon. The identification of the nitrosamine was achieved by comparison of its TLC R [subscript f] value, gas chromatographic retention time, and mass spectral fragmentation pattern with those of...
Resource Type:: Dissertation
Full Text:: . ^ Abstract approved: —t ^-* _•—v , =—. /R. A. Scanlan The formation of 3-hydroxy-N

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:: approved: -L - Dr. Richard A. Scanlan Porapak Q, Chromosorb 102, and Tenax GC, three porous

Formation of N-nitrosodimethylamine and nonvolatile N-nitrosamines from barley malt alkaloids

Creator:: Mangino, Mario M.
Abstract:: Amines formed by biosynthesis in germinated barley have been suggested as precursors for N-nitrosodimethylamine (NDMA) in barley malt dried by direct-fired kilning. This hypothesis was verified by germinating raw barley and exposing the resulting malt roots and clean malt to nitrous acid. Quantitation of the NDMA formed indicated that malt...
Resource Type:: Dissertation
Full Text:: The author wishes to thank his major advisor. Dr. Richard A. Scanlan, for providing the funds and

Formation of N-nitrosopyrrolidine from various pyrrolidine ring-containing compounds at elevated temperatures

Creator:: Huxel, Edward Thomas
Resource Type:: Masters Thesis
Full Text:: ELEVATED TEMPERATURES _ Abstract approved: - Richard A. Scanlan The formation of N

Measurement of dimethylamine and trimethylamine in Dungeness crab, Cancer magister

Creator:: Gulan, Michael Peter
Abstract:: A rapid gas liquid chromatographic method was adapted to processed Dungeness crab for the determination of basic and neutral volatiles. Methylamine, dimethylamine, and trimethylamine were measured in processed Dungeness crab for the first time. Generally, the range for trimethylamine was 42 ppm for frozen crab to 700 ppm for iced...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Richard A. Scanlan A rapid gas liquid chromatographic method was adapted to pro

The autoxidation of 2, 4-decadienal

Creator:: Matthews, Roy Frank
Abstract:: 2, 4-Decadienal was autoxidized by subjecting a purified sample to an atmosphere of pure oxygen for 14 hours. A qualitative analysis of the autoxidative degradation products was made utilizing tandem gas chromatography and mass spectrometry. Additional information was obtained from the determination of the melting point of the DNP-hydrazone derivative...
Resource Type:: Masters Thesis
Full Text:: . Richard A. Scanlan 2, 4-Decadienal was autoxidized by subjecting a purified sample to an atmosphere

Biodiversity in managed forests of western Oregon : species assemblages in leave islands, thinned, and unthinned forests

Creator:: Wessell, Stephanie J.
Abstract:: Both leave islands, or green tree retention clusters, and thinning prescriptions have been proposed as alternative silvicultural strategies designed to sustain the structural and biological diversity of managed forests. However, the relationship of the physical structure of leave islands and thinned forests to their associated microclimates, flora, and fauna remain...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: Deanna H. Olson Richard A. Schmi{zj Both leave islands, or green tree retention

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