21 Result(s)

Article

Fabrication and Characterization of Polycrystalline Silicon Thin Films by Reactive Thermal CVD with Si₂H₆ and F₂

Low-temperature growth of polycrystalline Silicon thin films has been investigated to fabricate thin film transistors by a new thermal CVD with the reactive source gases, Si₂H₆ and F₂, resulting in the film growt...

J. W. Lee, K. Shimizu, J. Hanna in MRS Online Proceedings Library (2011)

Article

Epigenetic memory in induced pluripotent stem cells

Somatic cell nuclear transfer and transcription-factor-based reprogramming revert adult cells to an embryonic state, and yield pluripotent stem cells that can generate all tissues. Through different mechanisms...

K. Kim, A. Doi, B. Wen, K. Ng, R. Zhao, P. Cahan, J. Kim, M. J. Aryee, H. Ji… in Nature (2010)

Article

Interstitial Collagenase Activity Stimulates the Formation of Actin Rings and Ruffled Membranes in Mouse Marrow Osteoclasts

Interstitial collagenase activity stimulates bone resorption by mouse marrow osteoclasts [1]. Here, we show that collagenase activity promotes bone resorption by activating adherent osteoclasts to resorb bone....

L.S. Holliday, H.G. Welgus, J. Hanna, B.S. Lee, M. Lu… in Calcified Tissue International (2003)

Article

Recovery of fine-size coal from impounded wastes

Over the years, Alabama’s coal industry has generated, during mining and cleaning operations, about 150 million st of fine waste coal, with this total increasing at a rate of 2 million stpy. Reclamation of the...

J. Hanna, R. Kalathur in Mining, Metallurgy & Exploration (1992)

Article

Phosphorus removal by dispersed air oxidation

Researchers at The University of Alabama have recently developed a two-step method for the treatment of phosphorus sludge. The process includes the bulk removal of phosphorus by physical separation techniques ...

J. Hanna, J. Jung in Mining, Metallurgy & Exploration (1992)

Article

Recovery and removal of elemental phosphorous from electric furnace sludge

Electrothermal production of elemental phosphorous (P₄) generates substantial amounts of highly toxic phossy water and sludges. Because of their high phosphorous contents and lack of reliable processing technolog...

I. J. Anazia, J. Jung, J. Hanna in Mining, Metallurgy & Exploration (1992)

Article

Irish Perinatal Society Proceedings of Autumn Meeting held in Portlaoise, 22nd September, 1990

N. Gleeson, B. L. Sheppard, C. Boyle, L. Daly… in Irish Journal of Medical Science (1991)

Article

Fatty acid separation of siliceous carbonate phosphates

The University of Alabama Mineral Resources Institute (MRI) has developed a unique process for selective fatty acid flotation of carbonate gangue from sedimentary apatites (francolite) in the pH range of 4–6 w...

J. Hanna, I. Anazia in Mining, Metallurgy & Exploration (1990)

Article

Application of bentonitic clays in suspension fertilizer formulations

Four Ca-bentonitic clays from Alabama were evaluated for use in diammonium phosphate (DAP) or urea ammonium nitrate (UAN) fertilizer suspensions. The viscosity and gel strength of suspensions prepared with dif...

J. Hanna, H. R. Gonzalez in Mining, Metallurgy & Exploration (1990)

Article

Growth Kinetics for Propagation of Si-Network

Chemical reactions were systematically investigated with regard to the propagation of Si-network in the vicinity of the growing surface by using various precursors, SiH_n, SiH_nFm, and SiH_nCim (n+m≤3) generated by ...

M Azuma, H Shirai, J. Hanna, I Shimizu in MRS Online Proceedings Library (1989)

Article

Growth of Crystalline Silicon, Microcrystalline and Epitaxial at Low Substrate Temperature

Both microcrystalline and epitaxially grown Si thin films were prepared at low substrate temperature from different precursors under control of atomic hydrogen. With the precursors, SiHn (n≤3), generated by pl...

H. Tanabe, M. Azuma, T. Uematsu, H. Shirai, J. Hanna… in MRS Online Proceedings Library (1989)

Article

Growth of Amorphous and Crystalline Silicon by HR-CVD (Hydrogen Radical Enhanced CVD)

Systematic studies have been made on preparation of Si thin films from SiF₄ under control over the flow of atomic hydrogens. The gas phase reactions taking place in the mixture of fragments (SiFn) resulting from ...

N. Shibata, K. Fukuda, H. Ohtoshi, J. Hanna, S. Oda… in MRS Online Proceedings Library (1987)

Article

New flotation approach for carbonate phosphate separation

Selective fatty acid flotation of carbonate gangue from sedimentary apatites was achieved under acidic pHs without a specific apatite depressant and without conditioning the pulp with the collector. Concentrat...

… in Mining, Metallurgy & Exploration (1987)

Chapter

Material Design by Structural Modulation of Amorphous Semiconductors

A new concept in material design based on the structural modulation of amorphous semiconductors is described. Near-infrared sensitive photoconductors with high photoresponse are designed by employing stacked m...

S. Oda, H. Shirai, A. Tanabe, J. Hanna, I. Shimizu in Disordered Semiconductors (1987)

Article

Design of multiple layered a-Si:H(F)/a-SiGe_x:H(F) films for enhancement in photoresponse in the near-infrared spectrum

Photo-electric properties of a-Si:H(F)/a-SiGe_x:H(F) multilayer films were investigated by measurements of optical absorption, and photoconductivity in both steady and transient modes with the repetition length an...

H. Shirai, A. Tanabe, S. Oda, J. Hanna, T. Nakamura, I. Shimizu in Applied Physics A (1986)

Article

Reactive Deposition of a-Silicon and Si-Based Alloys

High photoconductive a-Si:H(F) and St-based alloys were prepared from “precursors” made by oxidation of silane with F₂ or reduction of SiFn (n=1,2,) with atomic hydrogen. Both crystalline and amorphous silicon we...

J. Hanna, S. Oda, H. Shibata, H. Shirai, A. Miyauchi… in MRS Online Proceedings Library (1986)

Article

Relaxant effects of selected bronchodilators on equine pulmonary vein and tracheal smooth muscle

Experiments were done in vitro to examine the pharmacological profiles of selected bronchodilators on equine pulmonary venous and tracheal smooth muscle. Histamine contractions of pulmonary vein were relaxed b...

J. Hanna, P. Eyre in Lung (1980)