Index Catalog // ScholarsArchive@OSU

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Creator:: Wolhowe, Matthew D.
Abstract:: Recent works have investigated use of the hydrogen isotopic composition of C₃₇ alkenones (δD[subscript K37s]), lipid biomarkers of certain haptophyte microalgae, as an independent paleosalinity proxy. I discuss herein the factors impeding such an application and identify the potential alternative use of δD[subscript K37s] measurements as a proxy for non-thermal,...
Resource Type:: Masters Thesis
Full Text:: OF THE THESIS OF Matthew D. Wolhowe for the degree of Master of Science in Oceanography

Hydrogen isotopic composition of C₃₇ alkenones and the ecology and physiology of coccolithophores

Creator:: Wolhowe, Matthew D.
Abstract:: A three-part study was conducted into the impact of physiological and ecological variables on the net isotopic fractionation of hydrogen, α[subscript K₃₇], expressed in C₃₇ alkenones. First, alkenone-producer production, abundance, and export were characterized in the summertime Gulf of California and Eastern Tropical North Pacific using compound-specific, labeled in situ...
Resource Type:: Dissertation
Full Text:: DISSERTATION OF Matthew D. Wolhowe for the degree of Doctor of Philosophy in Oceanography presented on

North Pacific deglacial hypoxic events linked to abrupt ocean warming

Creator:: Praetorius, S. K., Mix, A. C., Walczak, M. H., Wolhowe, M. D., Addison, J. A., and Prahl, F. G.
Abstract:: Marine sediments from the North Pacific document two episodes of expansion and strengthening of the subsurface oxygen minimum zone (OMZ) accompanied by seafloor hypoxia during the last deglacial transition. The mechanisms driving this hypoxia remain under debate. We present a new high-resolution alkenone palaeotemperature reconstruction from the Gulf of Alaska...
Resource Type:: Article
Full Text:: ° S 60° N 40° S 120° W 90° W150° E 150° W180° E 0 1,000 2,000 D ep th (m ) O xygen (μm ol

Initial study of kiln drying clear Douglas fir planks

Creator:: Stillwell, H. D. and Oregon Forest Products Laboratory
Abstract:: Checking was influenced b drying conditions. This influence was greatest before average moisture content reached 20 per cent, but tension in surface layers caused checking even below this point. Neither high initial dry-bulb temperature nor initial conditions of high equilibrium moisture content were conducive to checking. High temperature and high...
Resource Type:: Technical Report
Full Text:: Planks By H. D. Stiliwell Report No. D-4 January 1957 OREGON FOREST PRODUCTS LABORATORY State Board

Shrinkage of Douglas fir, western hemlock, and red alder as affected by drying conditions

Creator:: Espenas, Leif D., Oregon State University. Forest Research Laboratory, and Oregon State University. School of Forestry
Abstract:: Moisture content and shrinkage were determined on specimens equilibrated at two conditions for equilibrium moisture content (EMC) at room temperature after the specimens had been dried under a variety of constant temperatures with constant EMC's. Moisture content at room temperature equilibrium was less for specimens dried at high temperature than...
Resource Type:: Technical Report
Full Text:: Hemlock." For. Res. Lab., Ore. State Univ., Corvallis. Rep. D-9. 32 pp. 1967. McMILLEN, John M. "Drying

Forced-air drying of lumber in Western Oregon

Creator:: Kozlik, Charles J. and Oregon Forest Research Center
Abstract:: Forced-air drying of lumber is economically feasible as an aid to sawmills without dry kilns. Reduced cost of shipping more than offsets cost of drying with forced circulation of air. Investment in equipment is small. In the Willamette Valley, forced-air drying probably can be accomplished successfully throughout the year. High...
Resource Type:: Technical Report
Full Text:: d 7aced-dc Ze19 OF LUMBER IN WESTERN OREGON y C. J. Kozlik

Effect of kiln temperatures on strength of Douglas fir and western hemlock dimension lumber

Creator:: Kozlik, Charles J. and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: Fir and Western Hemlock Dimension Lumber By Charles J. Kozlik epor? D-11 rch 1968 a Forest

Effect of kiln conditions on the strength of Douglas fir and western hemlock

Creator:: Kozlik, Charles J. and Oregon State University. Forest Research Laboratory
Abstract:: To test the effects of kiln-drying on strength properties of Douglas fir and western hemlock, temperatures to 230 F, conditions for equilibrium moisture contents of 6 percent and 12 percent, and prolonged heating were investigated. Prolonged heating and choice of conditions for 6 percent or 12 percent equilibrium moisture content...
Resource Type:: Technical Report
Full Text:: Fir and Western Hemlock By Charles i. KozIk 0 ('Report D-9 August 1967 Forest Research

Seasoning and machining degrade in young-growth Douglas-fir dimension lumber

Creator:: Anderson, B. G., Knauss, A. C., Frashour, R. G., and Oregon Forest Products Laboratory
Abstract:: The increasing volume of young-growth Douglas-fir timber cut in the Pacific Northwest emphasizes the need for more knowledge on the characteristics of lumber sawed from these trees. The study described here was initiated to learn the extent arid causes of degrade resulting from kiln-drying young-growth Douglas-fir dimension lumber. At the...
Resource Type:: Technical Report
Full Text:: Dimension Lumber By B. G. Anderson A. C. Knauss R. G. Frashour Reporf No. D-1 May 1954 OREGON FOREST

Kiln schedules for Douglas fir and western hemlock dimension lumber

Creator:: Kozlik, Charles J. and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: , Principal Western Forest Industries THOMAS M. MELIN, Alternate Association LEIF D. ESPENAS, Secretary

ScholarsArchive@OSU

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Hydrogen isotopic composition of C₃₇ alkenones and the ecology and physiology of coccolithophores

North Pacific deglacial hypoxic events linked to abrupt ocean warming

Initial study of kiln drying clear Douglas fir planks

Shrinkage of Douglas fir, western hemlock, and red alder as affected by drying conditions

Forced-air drying of lumber in Western Oregon

Effect of kiln temperatures on strength of Douglas fir and western hemlock dimension lumber

Effect of kiln conditions on the strength of Douglas fir and western hemlock

Seasoning and machining degrade in young-growth Douglas-fir dimension lumber

Kiln schedules for Douglas fir and western hemlock dimension lumber

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