Index Catalog // ScholarsArchive@OSU

Creator:: Kirchman, David L., Keil, Richard G., and Wheeler, Patricia A.
Abstract:: The purpose of this study was to test the hypothesis that NH4+ uptake by heterotrophic bacteria in the subarctic Pacific is C limited. Addition of glucose (0.5–1.0 μM) stimulated NH4+ uptake in unfractionated water but had no effect on bacterial abundance. Glucose stimulation of NH4+ uptake was even greater in...
Resource Type:: Article
Full Text:: . Oceanogr.. 35(6), 1990, 1258-1266 0 1990, by the American Society of Limnology and Oceanography, Inc

Creator:: Reimers, Clare E., Lange, Carina B., Tabak, Marialana, and Bernhard, Joan M.
Abstract:: A temporal record of oxygen and NO3- concentrations in the bottom water of the Santa Barbara Basin indicates that outside waters spill over into the basin seasonally. It is proposed that an annual bottom-water cycle leads ultimately to varve production. As evidence in support of a benthic mechanism for varve...
Resource Type:: Article
Full Text:: . Oceanogr., 35(7), 1990, 1577-1585 0 1990, by the American Society of Limnology and Oceanography, Inc

Creator:: Wheeler, Patricia A. and Kokkinakis, Steven A.
Abstract:: Seasonal and diel changes in nutrient concentrations and nitrogen assimilation rates were used to assess the effects of NH4+ on NO3- assimilation. Surface-water NO3- concentrations ranged from 6 to 17 μM while NH4+ concentrations ranged from 0 to 0.4 μM. Total N assimilation ranged from 84 to 732 nM d–1...
Resource Type:: Article
Full Text:: , by the American Society of Limnology and Oceanography, Inc. Ammonium recycling limits nitrate use

Creator:: Carrington, James C. and Freed, Deon D.
Abstract:: The RNA genome of tobacco etch virus (TEV), a plant potyvirus, functions as an mRNA for synthesis of a 346-kilodalton polyprotein that undergoes extensive proteolytic processing. The RNA lacks a normal 5' cap structure at its terminus, which suggests that the mechanism of translational initiation differs from that of a...
Resource Type:: Article
Full Text:: /041590-08$02.00/0 Copyright © 1990, American Society for Microbiology Cap-Independent Enhancement of

Creator:: Selker, J. S., Haith, D. A., and Reynolds, J. E.
Abstract:: A general procedure is presented for calibrating a model for rainfall erosivity based on daily rainfall. The approach is based on probability distributions of wet-day precipitation amount and monthly erosivities which are inferred from published data summaries. The calibrated model was tested by comparisons with erosivities computed from hourly precipitation...
Resource Type:: Article
Full Text:: . Conversely, EÎ ^^ ̂ ^ produced when R̂ occurs in a single 1612 © 1990 American Society of Agricultural

Creator:: Miller, Charles B., Frost, Bruce W., Wheeler, Patricia A., Landry, Michael R., Welschmeyer, Nicholas, and Powell, Thomas M.
Abstract:: It has been suggested that production in offshore waters of the subarctic Pacific is limited by availability of dissolved Fe. Although that is not yet adequately established, the functional consequences of the limitation (if it exists) can be characterized from the results of the Subarctic Pacific Ecosystem Research (SUPER) program....
Resource Type:: Article
Full Text:: -1615 Q 199 1, by the American Society of Limnology and Oceanography, Inc. Ecological dynamics in the

Creator:: Falkner, Kelly, Measures, Chris I., Herbelin, Sarah E., Edmond, John M., and Weiss, Ray F.
Abstract:: A comprehensive, joint Soviet-American study of the chemistry of Lake Baikal, the world’s deepest (1,632 m) lake, was carried out in July 1988. In this paper, we report the major, minor, and preliminary trace element concentrations for three profiles obtained at or near the deepest and central part of the...
Resource Type:: Article
Full Text:: 1991, by the American Society of Limnology and Oceanography, Inc The major and minor element

Creator:: Prahl, Fredrick, Hayes, J. M., and Xie, T.-M.
Abstract:: The pentacyclic tritcrpene 17β(H), 21β(H)-hop-22(29)-ene (diploptence) occurs in sediments throughout the Columbia River drainage basin and off the southern coast of Washington state in concentrations comparable to long-chain plantwax n-alkanes. The same relationship is evident for diploptene and long-chain n-alkanes in soils from the Willamette Valley. Microorganisms indigenous to soils...
Resource Type:: Article
Full Text:: ), 1992, 1290-1300 0 1992, by the American Society of Limnology and Oceanography, Inc. Diploptene: An

Creator:: Wheatcroft, Robert A.
Abstract:: The potential for particle size-dependent bioturbation rates was experimentally tested at 1,240 m in the Santa Catalina Basin (eastern Pacific). Spherical glass bead tracers in five size classes (8- 16, 17-31, 32-62, 63-125, and 126-420 μm) were spread over the sediment surface and tube cored 997 d later. Downcore concentrations...
Resource Type:: Article

Creator:: Kitchen, James C. and Zaneveld, J. Ronald
Abstract:: Theoretical scattering computations are performed on a phytoplankton model consisting of three concentric spheres. The outer sphere represents the wall, membrane, or frustule and is assigned a relatively high index of refraction with no absorption. The middle layer represents the chloroplasts and is assigned a relatively low index of refraction...
Resource Type:: Article
Full Text:: 1992, by the American Society of Limnology and Oceanography, Inc. A three-layered sphere model of the

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