Index Catalog // ScholarsArchive@OSU

Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection

Creator:: Chong, Xinyuan, Kim, Ki-Joong, Ohodnicki, Paul R., Li, Erwen, Chang, Chih-Hung, and Wang, Alan X.
Abstract:: In this paper, we report a fiber-optic carbon dioxide (CO₂) near-infrared (IR) absorption sensor with only 8-cm sensing length that is coated with nanoporous metalorganic framework material Cu-BTC (BTC = benzene-1,3, 5-tricarboxylate). The multimode optical fiber was etched by hydrofluoric acid to remove the cladding and part of the core,...
Resource Type:: Article
Full Text:: of the fiber-optic sensor to alternating Ar and CO2 flows at (a) 1572.5 nm, (b) 1500 nm; Response

Tuning of Peroxiredoxin Catalysis for Various Physiological Roles

Creator:: Perkins, Arden, Poole, Leslie B., and Karplus, P. Andrew
Abstract:: Peroxiredoxins (Prxs) make up an ancient family of enzymes that are the predominant peroxidases for nearly all organisms and play essential roles in reducing hydrogen peroxide, organic hydroperoxides, and peroxynitrite. Even between distantly related organisms, the core protein fold and key catalytic residues related to its cysteine-based catalytic mechanism have...
Resource Type:: Article
Full Text:: Catalysis for Various Physiological Roles 1 2 Arden Perkinsa, Leslie B. Pooleb, and P. Andrew

Spatially distributed temperatures at the base of two mountain snowpacks measured with fiber-optic sensors

Creator:: Tyler, Scott W., Burak, Susan A., McNamara, James P., Lamontagne, Aurele, Selker, John S., and Dozier, Jeff
Abstract:: Snowpack base temperatures vary during accumulation and diurnally. Their measurement provides insight into physical, biological and chemical processes occurring at the snow/soil interface. Recent advances in Raman-spectra instruments, which use the scattered light in a standard telecommunications fiber-optic cable to infer absolute temperature along the entire length of the fiber,...
Resource Type:: Article
Full Text:: insight into physical, biological and chemical processes occurring at the snow/soil interface. Recent

Aqueous Synthesis of Tailored ZnO Nanocrsytals, Nanocrystal Assembiles, and Nanostructured Films by Physical Means Enabled by a Continuous Flow Microreactor

Creator:: Choi, Chang-Ho and Chang, Chih-hung
Abstract:: ZnO nanofilms with four distinctly different morphologies were fabricated by adjusting physical parameters including the flow rate of the solution and rpm of the rotating disk in the continuous flow mircroreactor system while keeping the same chemical precursors, precursor solution concentration, and reaction temperature. Controlled reactive species including colloidal ZnO...
Resource Type:: Article
Full Text:: Institute and School of 6 Chemical, Biological & Environmental Engineering, Oregon State University

Excited State Structural Events of a Dual-Emission Fluorescent Protein Biosensor for Ca²⁺ Imaging Studied by Femtosecond Stimulated Raman Spectroscopy

Creator:: Wang, Yanli, Tang, Longteng, Liu, Weimin, Zhao, Yongxin, Oscar, Breland G., Campbell, Robert E., and Fang, Chong
Abstract:: Fluorescent proteins (FPs) are luminescent biomolecules that emit characteristic hues upon irradiation. A group of calmodulin (CaM)-green FP (GFP) chimeras have been previously engineered to enable the optical detection of calcium ions (Ca²⁺). We investigate one of these genetically encoded Ca²⁺ biosensors for optical imaging (GECOs), GEM-GECO1, which fluoresces green...
Resource Type:: Article
Full Text:: Yongxin Zhao,b Breland G. Oscar,a Robert E. Campbell,b and Chong Fanga,1 aDepartment of Chemistry

Formation of zinc oxide films using submicron zinc particle dispersions

Creator:: Rajachidambaram, Meena S., Varga, Tamas, Kovarik, Libor, Sanghavi, Rahul, Shutthanandan, Vaithiyalingam, Thevuthasan, Suntharampillai, Han, Seung-Yeol, Chang, Chih-Hung, and Herman, Gregory S.
Abstract:: The thermal oxidation of submicron metallic Zn particles was studied as a method to form nanostructured ZnO films. The particles used for this work were characterized by electron microscopy, x ray diffraction, and thermal analysis to evaluate the Zn-ZnO core shell structure, surface morphology, and oxidation characteristics. Significant nanostructural changes...
Resource Type:: Article
Full Text:: dispersions Meena S. Rajachidambaram School of Chemical, Biological and Environmental Engineering, Oregon

Evolution of superficial lake water temperature profile under diurnal radiative forcing

Creator:: Vercauteren, Nikki, Huwald, Hendrik, Bou-Zeid, Elie, Selker, John S., Lemmin, Ulrich, Parlange, Marc B., and Lunati, Ivan
Abstract:: In lentic water bodies, such as lakes, the water temperature near the surface typically increases during the day, and decreases during the night as a consequence of the diurnal radiative forcing (solar and infrared radiation). These temperature variations penetrate vertically into the water, transported mainly by heat conduction enhanced by...
Resource Type:: Article
Full Text:: ,1 Marc B. Parlange,1 and Ivan Lunati4 Received 8 February 2011; revised 18 July 2011; accepted 1

Feasibility of soil moisture monitoring with heated fiber optics

Creator:: Sayde, Chadi, Gregory, Christopher, Gil‐Rodriguez, Maria, Tufillaro, Nick, Tyler, Scott, van de Giesen, Nick, English, Marshal, Cuenca, Richard, and Selker, John S.
Abstract:: Accurate methods are needed to measure changing soil water content from meter to kilometer scales. Laboratory results demonstrate the feasibility of the heat pulse method implemented with fiber optic temperature sensing to obtain accurate distributed measurements of soil water content. A fiber optic cable with an electrically conductive armoring was...
Resource Type:: Article
Full Text:: distributed Figure 1. Images showing (a) the sand column and (b) the fiber optic section (in helical coils

Environmental temperature sensing using Raman spectra DTS fiber-optic methods

Creator:: Tyler, Scott W., Selker, John S., Hausner, Mark B., Hatch, Christine E., Torgersen, Thomas, Thodal, Carl E., and Schladow, S. Geoffrey
Abstract:: Raman spectra distributed temperature sensing (DTS) by fiber-optic cables has recently shown considerable promise for the measuring and monitoring of surface and near-surface hydrologic processes such as groundwater–surface water interaction, borehole circulation, snow hydrology, soil moisture studies, and land surface energy exchanges. DTS systems uniquely provide the opportunity to monitor...
Resource Type:: Article
Full Text:: ., J. S. Selker, M. B. Hausner, C. E. Hatch, T. Torgersen, C. E. Thodal, and S. G. Schladow (2009

Tree rainfall interception measured by stem compression

Creator:: Friesen, J., van Beek, C., Selker, J., Savenije, H. H. G., and van de Giesen, N.
Abstract:: A method for measuring whole-tree interception of precipitation is presented which employs mechanical displacement sensors to measure trunk compression caused by the water captured by the tree. This direct and nondestructive method is demonstrated to be sensitive to less than 5 kg of interception field tests in Netherlands and Ghana.
Resource Type:: Article
Full Text:: experiment per sensor, a, b, and g the individual weighting coefficients, and Scorrected the corrected

ScholarsArchive@OSU

Ultrashort Near-Infrared Fiber-Optic Sensors for Carbon Dioxide Detection

Tuning of Peroxiredoxin Catalysis for Various Physiological Roles

Spatially distributed temperatures at the base of two mountain snowpacks measured with fiber-optic sensors

Aqueous Synthesis of Tailored ZnO Nanocrsytals, Nanocrystal Assembiles, and Nanostructured Films by Physical Means Enabled by a Continuous Flow Microreactor

Excited State Structural Events of a Dual-Emission Fluorescent Protein Biosensor for Ca²⁺ Imaging Studied by Femtosecond Stimulated Raman Spectroscopy

Formation of zinc oxide films using submicron zinc particle dispersions

Evolution of superficial lake water temperature profile under diurnal radiative forcing

Feasibility of soil moisture monitoring with heated fiber optics

Environmental temperature sensing using Raman spectra DTS fiber-optic methods

Tree rainfall interception measured by stem compression

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