Index Catalog // ScholarsArchive@OSU

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Creator:: Somes, Christopher J.
Abstract:: We present a new nitrogen isotope model incorporated into the three-dimensional ocean component of a global Earth System Climate Model designed for millennial timescale simulations. The model includes prognostic tracers for the stable nitrogen isotopes, ¹⁴N and ¹⁵N, in the nitrate (NO₃ˉ), phytoplankton, zooplankton, and detritus variables of the marine...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Christopher J. Somes for the degree of Master of Science in Oceanography

Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean

Creator:: Somes, Christopher J., Schmittner, Andreas, and Altabet, Mark A.
Abstract:: Nitrogen (N) fixation by specialized microorganisms (diazotrophs) influences global plankton productivity because it provides the ocean with most of its bio-available N. However, its global rate and large-scale spatial distribution is still regarded with considerable uncertainty. Here we use a global ocean nitrogen isotope model, in comparison with δ15NO3 observations,...
Resource Type:: Article
Full Text:: of atmospheric 2 iron deposition for nitrogen fixation across the Pacific Ocean 3 Christopher J

SchmittnerComplementaryConstraintsCarbon.pdf

Creator:: Schmittner, A. and Somes, C. J.
Abstract:: A three-dimensional, process-based model of the ocean’s carbon and nitrogen cycles, including 13C and 15N isotopes, is used to explore effects of idealized changes in the soft-tissue biological pump. Results are presented from one preindustrial control run (piCtrl) and six simulations of the Last Glacial Maximum (LGM) with increasing values...
Full Text:: Citation: Schmittner, A., and C. J. Somes (2016), Complementary constraints from carbon ( 13 C) and

SchmittnerComplementaryConstraintsCarbonSupportingInfo.pdf

Creator:: Schmittner, A. and Somes, C. J.
Abstract:: A three-dimensional, process-based model of the ocean’s carbon and nitrogen cycles, including 13C and 15N isotopes, is used to explore effects of idealized changes in the soft-tissue biological pump. Results are presented from one preindustrial control run (piCtrl) and six simulations of the Last Glacial Maximum (LGM) with increasing values...
Full Text:: . Schmittner1, and C. J. Somes2 1College of Earth, Ocean, and Atmospheric Sciences, Oregon State University

Complementary constraints from carbon ¹³C and nitrogen ¹⁵N isotopes on the glacial ocean's soft-tissue biological pump

Creator:: Schmittner, A. and Somes, C. J.
Abstract:: A three-dimensional, process-based model of the ocean’s carbon and nitrogen cycles, including 13C and 15N isotopes, is used to explore effects of idealized changes in the soft-tissue biological pump. Results are presented from one preindustrial control run (piCtrl) and six simulations of the Last Glacial Maximum (LGM) with increasing values...
Resource Type:: Article

Immediate effects of acute stress on innate immunity in rainbow trout (Oncorhynchus mykiss)

Creator:: Demers, Nora Egan
Abstract:: This thesis tests the hypothesis that innate immunity may be enhanced immediately following a stressful event. The experiments characterize the acute effects of the fight or flight response on some immunological and endocrine parameters in rainbow trout (Oncorhynchus mykiss). Plasma cortisol and catecholamines were elevated within seconds of the initiation...
Resource Type:: Dissertation
Full Text:: professor, Dr. Christopher J. Bayne, for allowing me the opportunity to work with him. I am grateful for

Application of polyallylamine as a dry strength agent

Creator:: Rathi, Mahesh Shrikant
Abstract:: Dry strength is an inherent structural property of a paper sheet. It is due primarily to the development of fiber-to-fiber bonds. Polyamines, especially polyallylamine·HC1 (PAA), were found to be suitable mordants for rosin sizing. However, their effectiveness as dry strength agents has not been studied. In this study polyallylamine·HC1 was...
Resource Type:: Masters Thesis

Kraft pulping of Douglas-fir with soluble anthraquinone

Creator:: Dutta, Tapas
Abstract:: Several additives have been used in research and on an industrial scale to improve the pulp yield and to increase the rate of delignification. One such additive is 1,4- dihydro- 9,10-dihydroxyanthracene (DDA), also called soluble anthraquinone. This chemical is widely used in Japan and some other countries, especially with the...
Resource Type:: Masters Thesis

Immunological perspectives of a host-parasite system : studies on the humoral and cellular components of Biomphalaria glabrata, New World host for Schistosoma mansoni

Creator:: Boswell, Carl A.
Abstract:: The host snail Biomphalaria glabrata and the parasitic trematode Schistosoma mansoni are valuable subjects for studies evaluating and defining immunological parameters that determine the outcome of individual host-parasite encounters. In this thesis, both soluble and cellular components of the snail's hemolymph were examined to gain insight into the basis for...
Resource Type:: Dissertation
Full Text:: , Dr. Christopher J. Bayne's, patience, enthusiasm, knowledge of the literature, and willingness to

The structure of the central nervous system of jumping spiders of the genus Phidippus (Araneae:Salticidae)

Creator:: Hill, David Edwin
Abstract:: The central nervous system of Phidippus, while comparable to that of other spiders in most respects, is distinguished by the extraordinary development of visual processing centers, associated with the complex visually-directed behavior of these animals. The primary neuropile of the anterior medial eyes consists of two distinct columnar synapsing regions....
Resource Type:: Masters Thesis
Full Text:: . Christopher J. Bayne of the Department of Zoology for his continued cooperation, not only in the securing of

ScholarsArchive@OSU

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean

SchmittnerComplementaryConstraintsCarbon.pdf

SchmittnerComplementaryConstraintsCarbonSupportingInfo.pdf

Complementary constraints from carbon ¹³C and nitrogen ¹⁵N isotopes on the glacial ocean's soft-tissue biological pump

Immediate effects of acute stress on innate immunity in rainbow trout (Oncorhynchus mykiss)

Application of polyallylamine as a dry strength agent

Kraft pulping of Douglas-fir with soluble anthraquinone

Immunological perspectives of a host-parasite system : studies on the humoral and cellular components of Biomphalaria glabrata, New World host for Schistosoma mansoni

The structure of the central nervous system of jumping spiders of the genus Phidippus (Araneae:Salticidae)

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Conference Section/Track

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Funding Body

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search