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Physical Sciences and Mathematics Commons

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1985

Chemistry

Chemistry Faculty Research & Creative Works

Articles 1 - 6 of 6

Full-Text Articles in Physical Sciences and Mathematics

Interobserver Variability In The Assessment Of Neurologic History And Examination In The Stroke Data Bank, David Shinar, Cynthia R. Gross, Jay P. Mohr, Louis R. Caplan, Thomas R. Price, Philip A. Wolf, Daniel B. Hier, Carlos S. Kase, Irene G. Fishman, Christine L. Wolf, Selma C. Kunitz Jan 1985

Interobserver Variability In The Assessment Of Neurologic History And Examination In The Stroke Data Bank, David Shinar, Cynthia R. Gross, Jay P. Mohr, Louis R. Caplan, Thomas R. Price, Philip A. Wolf, Daniel B. Hier, Carlos S. Kase, Irene G. Fishman, Christine L. Wolf, Selma C. Kunitz

Chemistry Faculty Research & Creative Works

Interobserver Reliability in Obtaining Neurologic Histories and Examinations Was Investigated among Neurologists Collaborating in the Stroke Data Bank (SDB). Seventeen In-Hospital Stroke Patients Were Examined by Six Neurologists Experienced in Stroke over the Course of Three Days. Patients Were Examined Twice a Day for Two Successive Days, with Each Patient Seen by Four Different Neurologists. Data Were Recorded on SDB Forms, According to Definitions and Procedures Established for the SDB. Percent Agreement and Κ Coefficients Were Calculated to Assess the Levels of Agreement for Each Item. Important Differences in Levels of Agreement Were Found among Items on Both Neurologic History …


Removal Of Colloidal Silica In Simulated Seawater By A Dynamic Multi-Short-Circuited Galvanic Cell, Jan E. Osterholm, Paul W. Kramer, Hlrotsugu K. Yasuda Jan 1985

Removal Of Colloidal Silica In Simulated Seawater By A Dynamic Multi-Short-Circuited Galvanic Cell, Jan E. Osterholm, Paul W. Kramer, Hlrotsugu K. Yasuda

Chemistry Faculty Research & Creative Works

A dynamic multi-short-circuited galvanic cell (MSCGC) with Pt-AI electrodes has been used to study the removal of colloidal silica from seawater as a pretreatment step for the desalination of seawater by use of reverse osmosis. The rate of silica removal is observed to be affected by the flow rate of the solution through the cell and the dissolved oxygen content of the solution as well as by the nature of the aluminum electrode surface and the number of contact points (short circuits) between the aluminum and platinum. The total silica content is reduced by 95 % by use of this …


Dynamic Structure Of N-Hexadecane Solubilized In A Nonionic Surfactant Bilayer Measured By Deuteron Magnetic Resonance, Anthony J.I. Ward, Stig Friberg, David W. Larsen, Shankar B. Rananavare Jan 1985

Dynamic Structure Of N-Hexadecane Solubilized In A Nonionic Surfactant Bilayer Measured By Deuteron Magnetic Resonance, Anthony J.I. Ward, Stig Friberg, David W. Larsen, Shankar B. Rananavare

Chemistry Faculty Research & Creative Works

A 2H NMR study was made of the order parameters of n-hexadecane molecules solubilized up to 55% (w/w) in a lyotropic lamellar liquid crystal of tetra ethylene glycol n-dodecyl ether and water for a range of compositions of varying water and hydrocarbon content. The NMR data supported a model with only a small amount of penetration of the hydrocarbon between the amphiphilic molecules and a rapid exchange on the 2H NMR time scale between the penetrated segments and the nonpenetrating molecules which latter are essentially isotropic. © 1985, American Chemical Society. All rights reserved.


Chapter 3 Coatings And Surface Modification Using Low Pressure Non-Equilibrium Plasmas, Harold F. Winters, Robert P.H. Chang, C. J. Mogab, John Evans, John A. Thornton, Hirotsugu Yasuda Jan 1985

Chapter 3 Coatings And Surface Modification Using Low Pressure Non-Equilibrium Plasmas, Harold F. Winters, Robert P.H. Chang, C. J. Mogab, John Evans, John A. Thornton, Hirotsugu Yasuda

Chemistry Faculty Research & Creative Works

No abstract provided.


Plasma Polymerization Investigated By The Substrate Temperature Dependence., H. Yasuda, Cheng Wang Jan 1985

Plasma Polymerization Investigated By The Substrate Temperature Dependence., H. Yasuda, Cheng Wang

Chemistry Faculty Research & Creative Works

In the reported experiments, plasma polymerization of tetrafluoroethylene (TFE), perfluoro-2-butyl-tetrahydrofuran (PFBTHF), ethylene, and styrene were investigated in various combinations of monomer flow rates and discharge wattages for the substrate temperature range of minus 50 to 80 degree C. The polymer deposition rates can be generally expressed by k//o equals Ae** minus **b**t, where k//o is the specific deposition rate given by k//o equals (deposition rate)/(mass flow rate of monomer), A is the preexponential factor representing the extrapolated value of k//o at zero absolute temperature, and b is the temperature-dependence coefficient. It was found that the value of b is not …


Racial Differences In The Distribution Of Posterior Circulation Occlusive Disease, Philip B. Gorelick, Louis R. Caplan, Daniel B. Hier, Dushyant Patel, Patricia Langenberg, Michael S. Pessin, Jose Biller, David Kornack Jan 1985

Racial Differences In The Distribution Of Posterior Circulation Occlusive Disease, Philip B. Gorelick, Louis R. Caplan, Daniel B. Hier, Dushyant Patel, Patricia Langenberg, Michael S. Pessin, Jose Biller, David Kornack

Chemistry Faculty Research & Creative Works

We Compared Clinical and Arteriographic Features in 27 White and 24 Black Patients with Symptomatic Posterior Circulation Occlusive Disease. the Degree of Arterial Stenosis Was Measured Independently by Two Examiners at 12 Sites within the Vertebrobasilar Territory. Racial Comparisons Were Made based Upon the Distribution of Extra- and Intracranial Occlusive Lesions and Symptomatic Sites of the Lesions. White Patients Had Significantly More Angina Pectoris, More Lesions of the Origin of the Left Vertebral Artery and More High-Grade Lesions of the Extracranial Vertebral Arteries. Black Patients Had Significantly Higher Mean Diastolic Blood Pressure, More Diabetes Mellitus, More Lesions of the Distal …