Index Catalog // ScholarsArchive@OSU

Deposition of chemicals in semi-porous solids using supercritical fluid carriers

Creator:: Sahle-Demessie, Endalkachew
Resource Type:: Dissertation
Full Text:: supercritical fluid carriers AN ABSTRACT OF THE THESIS OF Endalkachew Sahle-Demessie for the degree of Doctor

Dynamic modeling of thermal treatment of timber poles

Creator:: Sahle-Demessie, Endalkachew
Abstract:: The temperature-time-location relationships during steam conditioning and pressure treatment of timber poles have been studied and mathematical models that take into account both the thermal properties of the poles and the parameters of the treatment process have been developed. Although much work has been previously done in this area, the...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF Endalkachew Sahle-Demessie for the degree of Master of Science in Chemical

Supercritical fluid (SCF) treatment: Its effect on bending strength and stiffness of ponderosa pine sapwood

Creator:: Smith, Susan M., Demessie, E. Sahle, Morrell, Jeffrey J., Levien, Keith L., and Ng, Harry
Abstract:: Adverse effects on mechanical properties from using a supercritical fluid (SCF) to increase preservative penetration of refractory woods were evaluated by treating small ponderosa pine sapwood specimens with supercritical carbon dioxide at 64 combinations of temperatures (35 to 80 C), pressure (1,000 to 4,000 psig), and time (0.5 to 2...
Resource Type:: Article
Full Text:: of Forest Products Oregon State University Corvallis, OR 9733 1 E. Sahle Demessie Graduate

Supercritical carbon dioxide treatment: Effect on permeability of Douglas-fir heartwood

Creator:: Demessie, Endalkachew Sahle, Hassan, Ali, Levien, Keith L., Kumar, Satish, and Morrell, Jeffrey J.
Abstract:: The effect of supercritical fluid treatment on superficial gas permeability of Douglas-fir was investigated by using carbon dioxide either alone or amended with methanol. Permeability increased in a majority of samples, although nearly one-third of the specimens declined in permeability. Improvements in permeability appeared to be unrelated to variations in...
Resource Type:: Article
Full Text:: OF DOUGLAS-FIR HEARTWOOD1 Endalkachew Sahle Demessie Graduate Research Assistant Ali Hassan

Biosynthetic Studies of the α-Amylase Inhibitor Trestatin in Streptomyces dimorphogenes

Creator:: Demessie, Ananiya A.
Abstract:: The prevalence of obesity and diabetes in the United States and globally has been rising in the last few decades and it continues to climb. One of the causes for this increase is the over consumption of sugars and/or carbohydrates. Among medications available to treat obesity and diabetes are the...
Resource Type:: Undergraduate Thesis and Presentation
Full Text:: +EcoRl pTMAD004 Conjugation between E. coli and Streptomyces dimorphogenes was not successful

Investigation of Microalgae Co-Cultures for Nutrient Recovery and Algal Biomass Production from Dairy Manure

Creator:: Asmare, A. M., Demessie, B. A., and Murthy, G. S.
Abstract:: Treatment of waste streams using algae can minimize eutrophication by removing inorganic nutrients while producing biomass which can be used for biofuels, animal feed, and fertilizer production. While there are many studies that report the growth of individual algal strains in different media, there are relatively few studies that examine...
Resource Type:: Article
Full Text:: Recovery and Algal Biomass Production from Dairy Manure Asmare, A. M., Demessie, B. A., Murthy, G. S

Targeted Nanocarriers for Systemic Delivery of IRAK4 Inhibitors to Inflamed Tissues

Creator:: Park, Youngrong, Korzun, Tetiana, Moses, Abraham S., Singh, Prem, Levasseur, Peter R., Demessie, Ananiya A., Sharma, Kongbrailatpam Shitaljit, Morgan, Terry, Raitmayr, Constanze J., Avila, Uriel, Sabei, Fahad Y., Taratula, Olena R., Marks, Daniel L., and Taratula, Oleh
Abstract:: Persistent and uncontrolled inflammation is the root cause of various debilitating diseases. Given that interleukin-1 receptor–associated kinase 4 (IRAK4) is a critical modulator of inflammation, inhibition of its activity with selective drug molecules (IRAK4 inhibitors) represents a promising therapeutic strategy for inflammatory disorders. To exploit the full potential of this...
Resource Type:: Article
Full Text:: , Peter R. Levasseur, Ananiya A. Demessie, Kongbrailatpam Shitaljit Sharma, Terry Morgan, Constanze J

The effects of supercritical CO₂ on the bending properties and treatment defects of four refractory wood species

Creator:: Anderson, Matthew E.
Abstract:: It is difficult to treat the heartwood of many wood species with liquid preservatives using conventional liquid processes. Supercritical fluids (SCF) used as carriers of preservatives to impregnate refractory wood species may be an attractive alternative to conventional liquid carriers. While SCF impregnation has many potential advantages, some wood species...
Resource Type:: Masters Thesis
Full Text:: privacy. AN ABSTRACT OF THE THESIS OF Matthew E. Anderson for the degree of Master of Science in Forest

Effect of process variations during supercritical fluid impregnation on cyproconazole retention and distribution in ponderosa pine sapwood

Creator:: Kang, Sung-Mo, Levien, Keith L., and Morrell, Jeffrey J.
Abstract:: The effect of process variations under supercritical conditions on cyproconazole retention and distribution in ponderosa pine sapwood boards was assessed. While pressure and temperature appeared to affect biocide solubility to some extent, the overall results suggested that biocide movement into wood was influenced more by diffusion than bulk flow. Biocide...
Resource Type:: Article
Full Text:: . MORRELL, J. J., K. L. LEVIEN, E. SAHLE-DEMESSIE, S. KUMAR, S. SMITH, AND H. M. BARNES. 1993. Treatment of

In-situ measurement of dimensional changes during supercritical fluid impregnation of white spruce lumber

Creator:: Kim, Gyu Hyeok and Morrell, Jeffrey J.
Abstract:: Supercritical fluids can markedly enhance preservative treatment of wood, but the high pressures employed can lead to collapse. We investigated the effects of the rates of pressure application and release on displacement of white spruce lumber during supercritical impregnation with carbon dioxide. Displacement was greatest when pressure was rapidly increased...
Resource Type:: Article
Full Text:: . KUMAR. E. SAHLE DEMESSIE. K. L. LEVIEN, ANI) J. J. M ~ R R E L L . 1997. Bending properties of TCMTB

ScholarsArchive@OSU

Deposition of chemicals in semi-porous solids using supercritical fluid carriers

Dynamic modeling of thermal treatment of timber poles

Supercritical fluid (SCF) treatment: Its effect on bending strength and stiffness of ponderosa pine sapwood

Supercritical carbon dioxide treatment: Effect on permeability of Douglas-fir heartwood

Biosynthetic Studies of the α-Amylase Inhibitor Trestatin in Streptomyces dimorphogenes

Investigation of Microalgae Co-Cultures for Nutrient Recovery and Algal Biomass Production from Dairy Manure

Targeted Nanocarriers for Systemic Delivery of IRAK4 Inhibitors to Inflamed Tissues

The effects of supercritical CO₂ on the bending properties and treatment defects of four refractory wood species

Effect of process variations during supercritical fluid impregnation on cyproconazole retention and distribution in ponderosa pine sapwood

In-situ measurement of dimensional changes during supercritical fluid impregnation of white spruce lumber

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