Index Catalog // ScholarsArchive@OSU

Spatial and Temporal Variability of Macroinvertebrates in Spawning and Non-Spawning Habitats during a Salmon Run in Southeast Alaska

Creator:: Campbell, Emily Y., Merritt, Richard W., Cummins, Kenneth W., and Benbow, M. Eric
Abstract:: Spawning salmon create patches of disturbance through redd digging which can reduce macroinvertebrate abundance and biomass in spawning habitat. We asked whether displaced invertebrates use non-spawning habitats as refugia in streams. Our study explored how the spatial and temporal distribution of macroinvertebrates changed during a pink salmon (Oncorhynchus gorbuscha) spawning...
Resource Type:: Article
Full Text:: *¤, Richard W. Merritt1, Kenneth W. Cummins2, M. Eric Benbow1,3 1Department of Entomology, Michigan State

Circadian Regulation of Glutathione Levels and Biosynthesis in Drosophila melanogaster

Creator:: Beaver, Laura M., Klichko, Vladimir I., Chow, Eileen S., Kotwica-Rolinska, Joanna, Williamson, Marisa, Orr, William C., Radyuk, Svetlana N., and Giebultowicz, Jadwiga M.
Abstract:: Circadian clocks generate daily rhythms in neuronal, physiological, and metabolic functions. Previous studies in mammals reported daily fluctuations in levels of the major endogenous antioxidant, glutathione (GSH), but the molecular mechanisms that govern such fluctuations remained unknown. To address this question, we used the model species Drosophila, which has a...
Resource Type:: Article
Full Text:: and Biosynthesis in Drosophila melanogaster Laura M. Beaver1¤a, Vladimir I. Klichko2, Eileen S. Chow1

Amplification and dampening of soil respiration by changes in temperature variability

Creator:: Sierra, C. A., Harmon, M. E., Thomann, E., Perakis, S. S., and Loescher, H. W.
Abstract:: Accelerated release of carbon from soils is one of the most important feedbacks related to anthropogenically induced climate change. Studies addressing the mechanisms for soil carbon release through organic matter decomposition have focused on the effect of changes in the average temperature, with little attention to changes in temperature variability....
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Full Text:: Amplification and dampening of soil respiration by changes in temperature variability C. A. Sierra1,*, M. E

Genome-Wide Profiling and Analysis of Arabidopsis siRNAs

Creator:: Kasschau, Kristin D., Fahlgren, Noah, Chapman, Elisabeth J., Sullivan, Christopher M., Cumbie, Jason S., Givan, Scott A., and Carrington, James C.
Abstract:: Eukaryotes contain a diversified set of small RNA-guided pathways that control genes, repeated sequences, and viruses at the transcriptional and posttranscriptional levels. Genome-wide profiles and analyses of small RNAs, particularly the large class of 24-nucleotide (nt) short interfering RNAs (siRNAs), were done for wild-type Arabidopsis thaliana and silencing pathway mutants...
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Full Text:: siRNAs Kristin D. Kasschau 1,2 , Noah Fahlgren 1,2,3 , Elisabeth J. Chapman 1,2,3 , Christopher M

Catalyst selective and regiodivergent O- to C- or N-carboxyl transfer of pyrazolyl carbonates: synthetic and computational studies

Creator:: Gould, Eoin, Walden, Daniel M., Kasten, Kevin, Johnston, Ryne C., Wu, Jiufeng, Slawin, Alexandra M., Mustard, Thomas J. L., Johnston, Brittany, Davies, Tony, Cheong, Paul Ha-Yeon, and Smith, Andrew D.
Abstract:: The regiodivergent O- to C- or N-carboxyl transfer of pyrazolyl carbonates is described, with DMAP giving preferential N-carboxylation and triazolinylidenes promoting selective C-carboxylation (both with up to >99 : 1 regioselectivity). An enantioselective O- to C-carboxyl variant using NHC catalysis is demonstrated (up to 92% ee), while mechanistic and DFT studies outline...
Resource Type:: Article
Full Text:: and computational studies Gould, E., Walden, D. M., Kasten, K., Johnston, R. C., Wu, J., Slawin, A. M

The ERI-6/7 Helicase Acts at the First Stage of an siRNA Amplification Pathway That Targets Recent Gene Duplications

Creator:: Fischer, Sylvia E. J., Montgomery, Taiowa A., Zhang, Chi, Fahlgren, Noah, Breen, Peter C., Hwang, Alexia, Sullivan, Christopher M., Carrington, James C., and Ruvkun, Gary
Abstract:: Endogenous small interfering RNAs (siRNAs) are a class of naturally occuring regulatory RNAs found in fungi, plants, and animals. Some endogenous siRNAs are required to silence transposons or function in chromosome segregation; however, the specific roles of most endogenous siRNAs are unclear. The helicase gene eri-6/7 was identified in the...
Resource Type:: Article
Full Text:: A. Montgomery1, Chi Zhang1, Noah Fahlgren2, Peter C. Breen1, Alexia Hwang1, Christopher M

High-Throughput Sequencing of Arabidopsis microRNAs : Evidence for Frequent Birth and Death of MIRNA Genes

Creator:: Fahlgren, Noah, Howell, Miya D., Kasschau, Kristin D., Sullivan, Christopher M., Cumbie, Jason S., Givan, Scott A., Law, Theresa F., Grant, Sarah R., Dangl, Jeffrey L., and Carrington, James C.
Abstract:: In plants, microRNAs (miRNAs) comprise one of two classes of small RNAs that function primarily as negative regulators at the posttranscriptional level. Several MIRNA genes in the plant kingdom are ancient, with conservation extending between angiosperms and the mosses, whereas many others are more recently evolved. Here, we use deep...
Resource Type:: Article
Full Text:: . Kasschau1, Elisabeth J. Chapman1,2, Christopher M. Sullivan1, Jason S. Cumbie1, Scott A. Givan1, Theresa F

Genetic and Functional Diversification of Small RNA Pathways in Plants

Creator:: Xie, Zhixin, Johansen, Lisa K., Gustafan, Adam M., Kasschau, Kristin D., Lellis, Andrew D., Zilberman, Daniel, Jacobsen, Steven E., and Carrington, James C.
Abstract:: Multicellular eukaryotes produce small RNA molecules (approximately 21–24 nucleotides) of two general types, microRNA (miRNA) and short interfering RNA (siRNA). They collectively function as sequence-specific guides to silence or regulate genes, transposons, and viruses and to modify chromatin and genome structure. Formation or activity of small RNAs requires factors belonging...
Resource Type:: Article
Full Text:: Small RNA Pathways in Plants Zhixin Xie 1[, Lisa K. Johansen 1[, Adam M. Gustafson 1 , Kristin D

Coibamide A Induces mTOR-Independent Autophagy and Cell Death in Human Glioblastoma Cells

Creator:: Hau, Andrew M., Greenwood, Jeffrey A., Lohr, Christiane V., Serrill, Jeffrey D., Proteau, Philip J., Ganley, Ian G., McPhail, Kerry L., and Ishmael, Jane E.
Abstract:: Coibamide A is an N-methyl-stabilized depsipeptide that was isolated from a marine cyanobacterium as part of an International Cooperative Biodiversity Groups (ICBG) program based in Panama. Previous testing of coibamide A in the NCI in vitro 60 cancer cell line panel revealed a potent anti-proliferative response and "COMPARE-negative" profile indicative...
Resource Type:: Article
Full Text:: Autophagy and Cell Death in Human Glioblastoma Cells Andrew M. Hau1, Jeffrey A. Greenwood2, Christiane V

Roles of brca2 (fancd1) in Oocyte Nuclear Architecture, Gametogenesis, Gonad Tumors, and Genome Stability in Zebrafish

Creator:: Rodriguez-Mari, Adriana, Wilson, Catherine, Titus, Tom A., Canestro, Cristian, BreMiller, Ruth A., Yan, Yi-Lin, Nanda, Indrajit, Johnston, Adam, Kanki, John P., Gray, Erin M., He, Xinjun, Spitsbergen, Jan, Schindler, Detlev, and Postlethwait, John H.
Abstract:: Mild mutations in BRCA2 (FANCD1) cause Fanconi anemia (FA) when homozygous, while severe mutations cause common cancers including breast, ovarian, and prostate cancers when heterozygous. Here we report a zebrafish brca2 insertional mutant that shares phenotypes with human patients and identifies a novel brca2 function in oogenesis. Experiments showed that...
Resource Type:: Article
Full Text:: , Adam Johnston3, John P. Kanki3, Erin M. Gray1, Xinjun He1, Jan Spitsbergen4, Detlev Schindler2, John H

Thermal-plume fibre optic tracking (T-POT) test for flow velocity measurement in groundwater boreholes

Creator:: Bense, V. F, Hochreutener, R., Bour, O., Le Borgne, T., Lavenant, N., and Selker, J. S.
Abstract:: We develop an approach for measuring in-well fluid velocities using point electrical heating combined with spatially and temporally continuous temperature monitoring using distributed temperature sensing (DTS). The method uses a point heater to warm a discrete volume of water. The rate of advection of this plume, once the heating is...
Resource Type:: Article
Full Text:: estimated up to 50 m downstream from the heating point, depending on the pumping rate. The T-POT technique

A new instrument to measure plot-scale runoff

Creator:: Stewart, R. D., Liu, Z., Rupp, D. E., Higgins, C. W., and Selker, J. S.
Abstract:: Accurate measurement of the amount and timing of surface runoff at multiple scales is needed to understand fundamental hydrological processes. At the plot scale (i.e., length scales on the order of 1–10 m) current methods for direct measurement of runoff either store the water in a collection vessel, which is...
Resource Type:: Article
Full Text:: . At the plot scale (i.e., length scales on the order of 1–10 m) current methods for di- rect

Predation on an Upper Trophic Marine Predator, the Steller Sea Lion: Evaluating High Juvenile Mortality in a Density Dependent Conceptual Framework

Creator:: Horning, Markus and Mellish, Jo-Ann E.
Abstract:: The endangered western stock of the Steller sea lion (Eumetopias jubatus) - the largest of the eared seals - has declined by 80% from population levels encountered four decades ago. Current overall trends from the Gulf of Alaska to the Aleutian Islands appear neutral with strong regional heterogeneities. A published...
Resource Type:: Article
Full Text:: differential impact of predation on multiple vital rates. Citation: Horning M, Mellish J-AE (2012) Predation

Estimating heterotrophic respiration at large scales: challenges, approaches, and next steps

Creator:: Bond-Lamberty, Ben, Epron, Daniel, Harden, Jennifer, Harmon, Mark E., Hoffman, Forrest, Kumar, Jitendra, David McGuire, Anthony, and Vargas, Rodrigo
Abstract:: Heterotrophic respiration (HR), the aerobic and anaerobic processes mineralizing organic matter, is a key carbon flux but one impossible to measure at scales significantly larger than small experimental plots. This impedes our ability to understand carbon and nutrient cycles, benchmark models, or reliably upscale point measurements. Given that a new...
Resource Type:: Article
Full Text:: . Epron, J. Harden, M. E. Harmon, F. Hoffman, J. Kumar, A. D. McGuire, and R. Vargas. 2016. Estimating

Elemental Markers in Elasmobranchs: Effects of Environmental History and Growth on Vertebral Chemistry

Creator:: Smith, Wade D., Miller, Jessica A., and Heppell, Selina S.
Abstract:: Differences in the chemical composition of calcified skeletal structures (e.g. shells, otoliths) have proven useful for reconstructing the environmental history of many marine species. However, the extent to which ambient environmental conditions can be inferred from the elemental signatures within the vertebrae of elasmobranchs (sharks, skates, rays) has not been...
Resource Type:: Article
Full Text:: cleaned in Nanopure® (18 M Ohm, Barnstead International) water for 45 minutes. Samples were rinsed, dried

MHC Class I Antigen Presentation of DRiP-Derived Peptides from a Model Antigen Is Not Dependent on the AAA ATPase p97

Creator:: Palmer, Amy L. and Dolan, Brian P.
Abstract:: CD8⁺ T cells are responsible for killing cells of the body that have become infected or oncogenically transformed. In order to do so, effector CD8⁺ T cells must recognize their cognate antigenic peptide bound to a MHC class I molecule that has been directly presented by the target cell. Due...
Resource Type:: Article
Full Text:: (0.13 M citric acid and 0.0625 M dibasic sodium phosphate, pH = 3) at 1–26107 cells/ml for 2 minutes

Modeling the Winter–to–Summer Transition of Prokaryotic and Viral Abundance in the Arctic Ocean

Creator:: Winter, Christian, Payet, Jérôme P., and Suttle, Curtis A.
Abstract:: One of the challenges in oceanography is to understand the influence of environmental factors on the abundances of prokaryotes and viruses. Generally, conventional statistical methods resolve trends well, but more complex relationships are difficult to explore. In such cases, Artificial Neural Networks (ANNs) offer an alternative way for data analysis....
Resource Type:: Article
Full Text:: seasonal samples were retrieved 21-times at roughly weekly intervals from depths of 3 m, 10 m, 20 m, 30 m

Reproductive phase locking of mosquito populations in response to rainfall frequency

Creator:: Shaman, Jeffrey and Day, Jonathan F.
Abstract:: The frequency of moderate to heavy rainfall events is projected to change in response to global warming. Here we show that these hydrologic changes may have a profound effect on mosquito population dynamics and rates of mosquito-borne disease transmission. We develop a simple model, which treats the mosquito reproductive cycle...
Resource Type:: Article
Full Text:: reproduction and dwindling numbers (Figure 2b). Figure 2c shows how a population of parous Cx. nigripalpus

Evaluating Paratransgenesis as a Potential Control Strategy for African Trypanosomiasis

Creator:: Medlock, Jan, Atkins, Katherine E., Thomas, David N., Aksoy, Serap, and Galvani, Alison P.
Abstract:: Genetic-modification strategies are currently being developed to reduce the transmission of vector-borne diseases, including African trypanosomiasis. For tsetse, the vector of African trypanosomiasis, a paratransgenic strategy is being considered: this approach involves modification of the commensal symbiotic bacteria Sodalis to express trypanosome-resistance-conferring products. Modified Sodalis can then be driven into...
Resource Type:: Article
Full Text:: non-colonized offspring, termed m (e.g. m~100% implies perfect transmission from females to their

A regional real-time forecast of marine boundary layers during VOCALS-REx

Creator:: Wang, S., O'Neill, L. W., Jiang, Q., de Szoeke, Simon P., Hong, X., Jin, H., Thompson, W. T., and Zheng, X.
Abstract:: This paper presents an evaluation and validation of the Naval Research Laboratory's COAMPS® real-time forecasts during the VOCALS-REx over the area off the west coast of Chile/Peru in the Southeast Pacific during October and November 2008. The analyses focus on the marine boundary layer (MBL) structure. These forecasts are compared...
Resource Type:: Article
Full Text:: ◦ S (Fig. 2c and d). The locally warm SST area cen- tered at 72◦ W and 20◦ S results from the weak

ScholarsArchive@OSU

Spatial and Temporal Variability of Macroinvertebrates in Spawning and Non-Spawning Habitats during a Salmon Run in Southeast Alaska

Circadian Regulation of Glutathione Levels and Biosynthesis in Drosophila melanogaster

Amplification and dampening of soil respiration by changes in temperature variability

Genome-Wide Profiling and Analysis of Arabidopsis siRNAs

Catalyst selective and regiodivergent O- to C- or N-carboxyl transfer of pyrazolyl carbonates: synthetic and computational studies

The ERI-6/7 Helicase Acts at the First Stage of an siRNA Amplification Pathway That Targets Recent Gene Duplications

High-Throughput Sequencing of Arabidopsis microRNAs : Evidence for Frequent Birth and Death of MIRNA Genes

Genetic and Functional Diversification of Small RNA Pathways in Plants

Coibamide A Induces mTOR-Independent Autophagy and Cell Death in Human Glioblastoma Cells

Roles of brca2 (fancd1) in Oocyte Nuclear Architecture, Gametogenesis, Gonad Tumors, and Genome Stability in Zebrafish

Thermal-plume fibre optic tracking (T-POT) test for flow velocity measurement in groundwater boreholes

A new instrument to measure plot-scale runoff

Predation on an Upper Trophic Marine Predator, the Steller Sea Lion: Evaluating High Juvenile Mortality in a Density Dependent Conceptual Framework

Estimating heterotrophic respiration at large scales: challenges, approaches, and next steps

Elemental Markers in Elasmobranchs: Effects of Environmental History and Growth on Vertebral Chemistry

MHC Class I Antigen Presentation of DRiP-Derived Peptides from a Model Antigen Is Not Dependent on the AAA ATPase p97

Modeling the Winter–to–Summer Transition of Prokaryotic and Viral Abundance in the Arctic Ocean

Reproductive phase locking of mosquito populations in response to rainfall frequency

Evaluating Paratransgenesis as a Potential Control Strategy for African Trypanosomiasis

A regional real-time forecast of marine boundary layers during VOCALS-REx

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