Index Catalog // ScholarsArchive@OSU

Infecciones causadas por Clostridium difficile: una visión actualizada

Creator:: Hernandez-Rocha, Cristian, Naour, Sebastian, Alvarez-Lobos, Manuel, and Paredes-Sabja, Daniel
Abstract:: English: Clostridium difficile is an emerging anaerobic, spore forming pathogen, recognized as the etiological agent of ~ 30% of antibiotic associated diarrheas. Clinical symptoms can fluctuate from mild to moderate diarrhea, pseudomembranous colitis and toxic megacolon. The incidence of C. difficile associated infections (CDAI) is ~ 1% of total hospitalized...
Resource Type:: Article
Full Text:: . Infecciones causadas por Clostridium diffi cile: una visión actualizada Cristian Hernández-Rocha, Sebastián

Atypical presentation of pseudomembranous colitis localized in adenomatous polyps

Creator:: Hernández-Rocha, Cristian, Barra-Carrasco, Jonathan, Guzmán, Ana María, Paredes-Sabja, Daniel, Lezcano, Gabriel, Zoroquiaín, Pablo, and Álvarez-Lobos, Manuel
Abstract:: The most frequent cause of pseudomembranous colitis is Clostridium difficile (C. difficile) infection. This type of colitis is characterized by an endoscopic pattern of numerous small, yellowish or whitish plaques diffusely distributed, which typically compromises the rectum extending to proximal colon. Occasionally, the pseudomembranes compromise only the transverse or right...
Resource Type:: Article
Full Text:: Cristian Hernández-Rocha, Jonathan Barra-Carrasco, Ana María

Epidemic Clostridium difficile Ribotype 027 in Chile

Creator:: Hernandez-Rocha, Cristian, Barra-Carrasco, Jonathan, Pizarro-Guajardo, Marjorie, Ibanez, Patricio, Bueno, Susan M., Sarker, Mahfuzur R., Maria Guzman, Ana, Alvarez-Lobos, Manuel, and Paredes-Sabja, Daniel
Abstract:: The increased severity of Clostridium difficile infection is primarily attributed to the appearance of an epidemic strain characterized as PCR ribotype 027. The only report that identified epidemic C. difficile ribotype 027 in an American country outside of North America comes from Costa Rica, raising the possibility that strains 027...
Resource Type:: Article
Full Text:: Hernández-Rocha,1 Jonathan Barra-Carrasco,1 Marjorie Pizarro-Guajardo, Patricio Ibáñez, Susan M. Bueno

Riverine discharges impact physiological traits and carbon sources for shell carbonate in the marine intertidal mussel Perumytilus purpuratus

Creator:: Pérez, Claudia A., Lagos, Nelson A., Saldías, Gonzalo S., Waldbusser, George, and Vargas, Cristian A.
Abstract:: Anthropogenic modification watersheds and climate change have altered export from fluvial systems causing changes to the carbonate chemistry of river-influenced near shore environments. To determine the possible effects of riverine discharges on the mussel Perumytilus purpuratus, we performed in situ transplant experiments between river-influenced and open coastal habitats with contrasting...
Resource Type:: Article
Full Text:: Cristian A. Vargas*2,4 1Programa de Doctorado en Ciencias Ambientales, Department of Aquatic System

Temporal Genetic Variance and Propagule-Driven Genetic Structure Characterize Naturalized Rainbow Trout (Oncorhynchus mykiss) from a Patagonian Lake Impacted by Trout Farming

Creator:: Benavente, Javiera N., Seeb, Lisa W., Seeb, James E., Arismendi, Ivan, Hernández, Cristián E., Gajardo, Gonzalo, Galleguillos, Ricardo, Cádiz, Maria I., Musleh, Selim S., and Gomez-Uchida, Daniel
Abstract:: Knowledge about the genetic underpinnings of invasions—a theme addressed by invasion genetics as a discipline—is still scarce amid well documented ecological impacts of non-native species on ecosystems of Patagonia in South America. One of the most invasive species in Patagonia’s freshwater systems and elsewhere is rainbow trout (Oncorhynchus mykiss). This...
Resource Type:: Article
Full Text:: , J. N., Seeb, L. W., Seeb, J. E., Arismendi, I., Hernández, C. E., Gajardo, G., ... & Gomez-Uchida

Influence of climate and land use in carbon biogeochemistry in lower reaches of rivers in central southern Chile: Implications for the carbonate system in river-influenced rocky shore environments

Creator:: Pérez, Claudia A., DeGrandpre, Michael D., Lagos, Nelson A., Saldías, Gonzalo S., Cascales, Emma-Karin, and Vargas, Cristian A.
Abstract:: Freshwater discharge affects the biogeochemistry of river-influenced nearshore environments by contributing with carbon and nutrients. An increase in human activities in river basins may alter the natural riverine nutrients and carbon export to coastal ecosystems. Along a wide latitudinal range (32° 55'S-40° 10'S), this study explores the role of climate...
Resource Type:: Article
Full Text:: Cascales6, and Cristian A. Vargas2 1Programa de Doctorado en Ciencias Ambientales, Faculty of Environmental

Genome Wide Association Mapping for Abiotic and Biotic Stresses in Barley (Hordeum vulgare L.) Using Diverse Arrays of Doubled Haploids Derived From Intercrossing Exotic and Adapted Germplasm

Creator:: Hernandez, Javier
Abstract:: The following dissertation consists of six sections: a general introduction, three manuscripts, a general conclusion, and an overall bibliography. The three manuscripts report on: (1) identifying genetic interactions in diverse germplasm developed during introgression of a major gene conferring resistance to stem rust (Puccinia graminis f. sp. tritici), (2) mapping...
Resource Type:: Dissertation
Full Text:: Javier Hernandez Vasquez for the degree of Doctor of Philosophy in Crop Science presented on December 6

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

Quantum dot plasmon coupling : Fundamental study and applications

Creator:: Kannegulla, Akash
Abstract:: The dissertation focuses on the engineering of light-matter interaction using plasmonic nanoparticles and metamaterials to achieve enhanced luminescence and based on which to improve the performance of biosensing and light-emitting technologies. We designed and fabricated a spectrum of nanostructures to exhibit particular dispersion relations capable of controlling the spontaneous emission...
Resource Type:: Dissertation

Tracking Photoinduced Primary Events with Femtosecond Stimulated Raman Spectroscopy and Calculations

Creator:: Wang, Yanli
Abstract:: Femtosecond stimulated Raman spectroscopy (FSRS) is a powerful ultrafast technique which can track photoinduced excited state structural events on femtosecond (fs) to picosecond (ps) timescales. In addition to high temporal and spectral resolutions, FSRS provides a broad spectral window from ca. 100—2000 cm-1 for detection, enabling the direct mapping of...
Resource Type:: Dissertation

ScholarsArchive@OSU

Infecciones causadas por Clostridium difficile: una visión actualizada

Atypical presentation of pseudomembranous colitis localized in adenomatous polyps

Epidemic Clostridium difficile Ribotype 027 in Chile

Riverine discharges impact physiological traits and carbon sources for shell carbonate in the marine intertidal mussel Perumytilus purpuratus

Temporal Genetic Variance and Propagule-Driven Genetic Structure Characterize Naturalized Rainbow Trout (Oncorhynchus mykiss) from a Patagonian Lake Impacted by Trout Farming

Influence of climate and land use in carbon biogeochemistry in lower reaches of rivers in central southern Chile: Implications for the carbonate system in river-influenced rocky shore environments

Genome Wide Association Mapping for Abiotic and Biotic Stresses in Barley (Hordeum vulgare L.) Using Diverse Arrays of Doubled Haploids Derived From Intercrossing Exotic and Adapted Germplasm

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

Quantum dot plasmon coupling : Fundamental study and applications

Tracking Photoinduced Primary Events with Femtosecond Stimulated Raman Spectroscopy and Calculations

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