Index Catalog // ScholarsArchive@OSU

Multiple excitation fluorometer for in situ oceanographic applications

Creator:: Desiderio, Russell A., Moore, Casey, Lantz, Carl, and Cowles, Timothy J.
Abstract:: A new in situ fluorometer for the detection of oceanic photosynthetic pigment fluorescence is described. Emission spectra from 546 to 733 nm are recorded for each of three different visible excitation bands ten times a second. A Spectralon cell is used to improve the excitation coupling to and the collection...
Resource Type:: Article
Full Text:: applications Multiple excitation fluorometer for in situ oceanographic applications Russell A. Desiderio

In situ monitoring of ocean chlorophyll via laser-induced fluorescence backscattering through an optical fiber

Creator:: Cowles, Timothy J., Moum, James N., Desiderio, Russell A., and Angel, Stanley M.
Abstract:: The first seagoing test of a prototype laser/fiber-optic system for in situ detection of ocean chlorophyll fluorescence is described. Radiation at 488 nm originating from a shipboard argon laser was transmitted through 20 of 200-µm core optical fiber to the distal tip mounted on the microstructure profiler, the Rapid Sampling...
Resource Type:: Article
Full Text:: fluorescence backscattering through an optical fiber Timothy J. Cowles, James N. Moum, Russell A. Desiderio

Using lasers to probe the transient light absorption by proteorhodopsin in marine bacterioplankton

Creator:: Desiderio, Russell A., Laney, Samuel R., Letelier, Ricardo M., and Giovannoni, Stephen J.
Abstract:: We constructed an experimental apparatus that used lasers to provide the probe beams for measuring the transient absorption kinetics of bacterioplankton that contain proteorhodopsin, a microbial protein that binds retinal and is analogous to animal rhodopsin. With this approach we were able to observe photocycles characteristic of functioning retinylidene ion...
Resource Type:: Article
Full Text:: proteorhodopsin in marine bacterioplankton Russell A. Desiderio,1,* Samuel R. Laney,1,3 Ricardo M. Letelier,1 and

Microstructure Profiles of Laser-induced Chlorophyll Fluorescence Spectra: Evaluation of Backscatter and Forward-Scatter Fiber-Optic Sensors

Creator:: Desiderio, Russell A., Cowles, Timothy J., Moum, James N., and Myrick, Michael
Abstract:: The implementation and characterization of backscatter and forward-scatter fiber-optic fluorescence sensors attached to a microstructure profiling instrument are described. By using an optical multichannel array detector to record emission spectra, eight profiles per hour of chlorophyll fluorescence spectra at 2-cm intervals can be obtained throughout the upper 100 m of...
Resource Type:: Article

Measuring the Natural Fluorescence of Phytoplankton Cultures

Creator:: Laney, S. R., Letelier, R. M., Desiderio, R. A., Abbott, Mark R., Kiefer, D. A., and Booth, C. R.
Abstract:: A laboratory instrument, the Natural Fluorescence Chemostat, was developed to measure the natural fluorescence of phytoplankton cultures. With this instrument, the physical and chemical environment of a culture can be manipulated with respect to temperature, pH, nutrient delivery rate, and light intensity, while the natural fluorescence and a weak stimulated...
Resource Type:: Article
Full Text:: Measuring the Natural Fluorescence of Phytoplankton Cultures S. R. LANEY,* R. M. LETELIER, R. A. DESIDERIO

Dormancy and Germination Pre-treatments in Willamette Valley Native Plants

Creator:: Russell, Michael
Abstract:: Seeds from 30 species of grasses and forbs native to Pacific Northwest prairies were tested for physical and physiological dormancy. The physical dormancy was determined by mechanically and chemically scarifying seeds. Physiological dormancy was evaluated with cold stratification before germination. Experiments were analyzed individually with ANOVA analysis, and by seed...
Resource Type:: Article
Full Text:: of winter (Baskin and Baskin 1991). Other species require a period of 390 Russell cooler

A comparison of observed (HALOE) and modeled (CCM2) methane and stratospheric water vapor

Creator:: Mote, Philip W., Holton, James R., Russell, James M., and Boville, Byron A.
Abstract:: Recent measurements (21 September - 15 October 1992) of methane and water vapor by the Halogen Occultation Experiment (HALOE) on the Upper Atmosphere Research Satellite (UARS) are compared with model results for the same season from a troposphere-middle atmosphere version of the National Center for Atmospheric Research (NCAR )Community Climate...
Resource Type:: Article
Full Text:: STRATOSPHERIC WATER VAPOR Philip W. Mote 1, James R. Holton 1, James M. Russell III 2, and Byron A. Boville 3

Comparison of Meldola’s Blue Staining and Hatching Assay with Potato Root Diffusate for Assessment of Globodera sp. Egg Viability

Creator:: Kroese, Duncan, Zasada, Inga A., and Ingham, Russell E.
Abstract:: Laboratory-based methods to test egg viability include staining with Meldola's Blue and/or juvenile (J2) hatching assays using potato root diffusate (PRD). These two methods have not been tested under identical conditions to directly compare their assessments of Globodera egg viability. Using two bioassay strategies, cysts from a Glabodera sp. population...
Resource Type:: Article
Full Text:: Potato Root Diffusate for Assessment of Globodera sp. Egg Viability DUNCAN KROESE,1 INGA A. ZASADA,2

Using Cure Models for Analyzing the Influence of Pathogens on Salmon Survival

Creator:: Ray, R. Adam, Perry, Russell W., Som, Nicholas A., and Bartholomew, Jerri L.
Abstract:: Parasites and pathogens influence the size and stability of wildlife populations, yet many population models ignore the population-level effects of pathogens. Standard survival analysis methods (e.g., accelerated failure time models) are used to assess how survival rates are influenced by disease. However, they assume that each individual is equally susceptible...
Resource Type:: Article
Full Text:: Survival Ray, R. A., Perry, R. W., Som, N. A., & Bartholomew, J. L. (2014). Using Cure Models for

Effect of Storage Environment on Hatching of the Cyst Nematode Globodera ellingtonae

Creator:: Ingham, Russell E., Kroese, Duncan, and Zasada, Inga A.
Abstract:: Globodera spp. eggs go through a diapause, which remains dormant until favorable hatching conditions are reached. Because of the regulatory concerns with cyst nematodes, it is often only possible to rear eggs for research in the greenhouse. However, hatch is often lower for greenhouse-produced eggs than for eggs obtained from...
Resource Type:: Article
Full Text:: the Cyst Nematode Globodera ellingtonae RUSSELL E. INGHAM,1 DUNCAN KROESE,2 AND INGA A. ZASADA2

ScholarsArchive@OSU

Multiple excitation fluorometer for in situ oceanographic applications

In situ monitoring of ocean chlorophyll via laser-induced fluorescence backscattering through an optical fiber

Using lasers to probe the transient light absorption by proteorhodopsin in marine bacterioplankton

Microstructure Profiles of Laser-induced Chlorophyll Fluorescence Spectra: Evaluation of Backscatter and Forward-Scatter Fiber-Optic Sensors

Measuring the Natural Fluorescence of Phytoplankton Cultures

Dormancy and Germination Pre-treatments in Willamette Valley Native Plants

A comparison of observed (HALOE) and modeled (CCM2) methane and stratospheric water vapor

Comparison of Meldola’s Blue Staining and Hatching Assay with Potato Root Diffusate for Assessment of Globodera sp. Egg Viability

Using Cure Models for Analyzing the Influence of Pathogens on Salmon Survival

Effect of Storage Environment on Hatching of the Cyst Nematode Globodera ellingtonae

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