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Electrooxidation Of Linear Alkyl Benzene Sulfonate (Las) On Pt Electrodes, Bi̇rgül Yazici, Si̇bel Zor

Turkish Journal of Chemistry

The electrochemical behaviour of linear alklybenzene sulfonate (LAS) on Pt electrodes was investigated in 0.05M Na_2SO_4 and in 0.1M NaCl at pH=8 by the potentiokinetic method and by electrolysis. The anodic and cathodic semilogarithmic current-potential curves were obtained between -1.6V - +1.6V. The experimental discharge potentials were determined by means of current-potential-curves obtained by electrolysis between 0-3V. The percentages of surface active material remaining in the solution after specified periods (0-6hrs) were determined for different initial concentrations of LAS (30, 150, 300 ppm) by using a potentiostat at +1.6V and by applying a potential of 20V via a direct current …

Reaction Of Tribromonitromethane With Aldehydes And Ketones In The Presence Of Zn Metal In Aqueous Medium, Ali̇ Shaker Mahasneh

Turkish Journal of Chemistry

Aldehydes and ketones react with tribromonitromethane in the presence of zinc metal dust, ammonium chloride and water to give dibromonitroalcohols in good yields.

Chlorination Of Two Turkish Lignites In Water And Water-Carbon Tetrachloride Media, Semra Karaca, Yücel Yaşar Kadioğlu, Sami̇h Bayrakçeken, M. Şahi̇n Gülaboğlu

Turkish Journal of Chemistry

The chlorine uptake of two Turkish lignites during chlorinolysis with chlorine gas in water and water-carbon tetrachloride media at ambient pressure (\cong 610 mmHg) was examined. The effects of speed of stirring (5-20s^{-1}), particle size (74-88, 150-180 and 250-425 \mu m), temperature (13-70°C) and chlorination time (0-18000 s) were studied. It is shown that the amount of chlorine uptake of both coals increased with decreasing particle size and increasing temperature.

Cover And Contents

Turkish Journal of Chemistry

No abstract provided.

Stabilities Of Complexes Of Scandium(Iii) And Yttrium(Iii) With Salicylic Acid, Naci̇ye Türkel, Rahmi̇ye Aydin, Ulvi̇ye Özer

Turkish Journal of Chemistry

The interactions of Sc(III) and Y(III) ions with salicyclic acid, SA (H_2L), were studied in aqueous solution by means of potentiometric and spectroscopic methods. The binding of SA occurs in Y(III):SA system, either in (1:1) or (1:2) mole ratios. The stability constants of the mono protonated complex, YHL^{2+}, and Y(HL)_2^+ type complex were calculated. The coordination of Sc(III) to SA was defined by means of Job's plot and its formation curve. The stability constants of ScL^+ and Sc(HL)L type complexes were determined by analysis of the potentiometric data; the coordination of SA to Sc(III) occurred through carboxylate and phenolic oxygens. …

Conformational Analysis Of Linear Peptide (Glu^1-Leu^2-Leu^3-Gly^4-Gly^5-Arg^6-Phe^7nh_2 ), Lütfü Demi̇r, Abdulhali̇k Karabulut, Gökhan Budak, Yusuf Şahi̇n, Nagif Sefteroğlu

Turkish Journal of Chemistry

Conformational energy-minimization of the Sea Anemone and Sea Pansy neuropeptide Pol-RFamide (Glu^1-Leu^2-Leu^3-Gly^4-Gly^5-Arg^6-Phe^7-NH_2) was carried out by molecular mechanics (MM). The linkage bonds were characterized by the torsion angles \theta, \psi and \omega and the side groups were characterized by the torsion angles \chi_1, \chi_2, \chi_3\ldots The energy-map for each monopeptide of the Pol-RFamide I was drawn in the range of -180° to 180° with increments of 20°. Conformation facilities for monopeptides were determined from these maps. These results were used in the analysis of the dipeptide (Glu^1-Leu^2). Then, the (Glu^1-Leu^2-Leu^3) tripeptide was examined using the calculated results for the dipeptide. …

Effect Of Temperature On The Electrooxidation Of Some Organic Molecules On Pt Doped Conducting Polymer Coated Electrodes, İpek Beceri̇k, Fehmi̇ Fiçicioğlu, Fi̇gen Kadirgan

Turkish Journal of Chemistry

Polymer modified electrodes are of importance as possible electrocatalysts for various electrode reactions, i.e., platinum incorporated into polypyrrole or polyaniline films are known to be good systems for the electrooxidation of various organic molecules. In this study, the effect of temperature on the electrooxidation of D. glucose and methanol on Pt doped films was investigated, apparent activation energies were calculated and the results were evaluated.

Comparative Mechanistic Studies On The Oxidation Of Aromatic And Aliphatic Hydroxyl Derivatives In An Alkaline Medium At Preanodized Pt, Au And Pt/Au Electrodes In Presence Of Redox Mediators, Sasha Kalcheva, Philip Iotov

Turkish Journal of Chemistry

The role of redox mediators obtained from Pt, Au, and Pt/Au electrodes in the process of electrocatalytic oxidation of aromatic/aliphatic hydroxyl derivatives in an alkaline medium has been studied by applying cyclic voltammetry. Phenol and glycerol were used as aromatic and aliphatic hydroxyl derivatives in the electrochemical oxidation experiments. The results revealed that the presence of redox mediators formed by preliminary electrode anodization is crucial for the process of oxidation of aromatic compounds and imposes a different oxidation route for the aliphatic hydroxyl derivatives. The effect of preanodization has been related to the formation and dissolution of the corresponding higher …

A Modified Potentiometric Method For The Estimation Of Phenol In Aqueous Systems, Farhat Huma, Muhammad Jaffar, Khalid Masud

Turkish Journal of Chemistry

A modified potentiometric titration is proposed for the estimation of phenol in aqueous systems. The method is evolved on the basis of a critical dependence of pH on log V rather than simple V, as used in conventional potentiometric titrations. The method incorporates titrants in a concentration range several orders of magnitude greater than that of phenol in the aqueous phase. Derivative potentiometric curves so obtained provide a clear exposition of the equivalence point and the overall error is found to be between \pm 1.0 and 1.5%. The range of phenol concentration investigated was from 10^{-2} to 10^{-3} M. and …

British Masculinities, Canadian Lawyers, W. Wesley Pue

All Faculty Publications

This paper explores the construction of early twentieth century Canadian legal professionalism as the workings-out of Britishness understood through the lenses of cultural history, cultures of imperialism, and gender relations. It provides a case study in the histories of professionalism in a settler colony.

Increasing Access To The University Of California: A Case Study Of Senate Constitutional Amendment 7, Jamillah Moore

Doctoral Dissertations

The purpose of this case study was to examine alternatives to the admissions process for students seeking enrollment in the University of California. As the University of California was the first public university in the nation to eliminate the consideration of race within their admissions process under SP-1, this study focused on undergraduate admissions solely within this institution. In addition, SP-1 did not ban affirmative action therefore this study did not focus on it. It should be noted that the University of California Board of Regents established SP-1 based upon Governor Wilson's executive order which called for the end of …

Comparative Student Perception And Interactional Event Analysis In An Urban Computer-Based Distance Education Environment, Michael Shawn Ireland

Theses and Dissertations in Urban Services - Urban Education

This two-part study used quasi-experimental research methodologies to analyze and assess students' perceptions of the level of their personal interaction, overall interaction, observed interaction, attitude, satisfaction and direct participation in synchronous computer-based interactive remote instruction (IRI) and two-way audio/one-way video (TELETECHNET) intra-urban distance learning environments. For the first part of this study 101 subjects were measured during a semester of instruction in three 4-week interval observations. Intact groups assigned to two different treatment environments, computer-based upper division and graduate level computer science distance learning courses, and two-way audio/one-way video upper division computer science distance learning courses were observed at an …

The Impacts Of External Nutrient Sources On Marine Phytoplankton In An Eastern Shore Sea-Side Estuary, Claudette Lajoie Jenkins

OES Theses and Dissertations

The Eastern Shore of Virginia (Greens Creek) as well as a large portion of the North Atlantic coastline is characterized by estuarine systems not dominated by large river systems. Instead, small freshwater creeks influence many coastal systems yet little information has been documented on their ecological significance. The focus of this research is to identify the biogeochemical and physical interactions within an estuarine water-column and understand the importance of freshwater sources in governing phytoplankton production. The hypothesis of this research is that increases in external nutrient loading into Greens Creek will not result in an increase in primary production. The …

Studies Related To The Design Of A Magnetic Suspension And Balance System For An Ultra-High Reynolds Number Flow Facility, Oscar Magno Michael Gomeiz

Mechanical & Aerospace Engineering Theses & Dissertations

The basic design principles for a magnetic suspension and balance system applied to the test section of an ultra-high Reynolds number facility are defined. The design of the cross-sectional area to be used in the test section is analyzed. The parameters of the permanent magnet to be used in the model inside the test section are investigated. The testing of magnetic fields at the center of a test pipe and validation of data by computer finite element analysis is described with the purpose of finding common results. The performance of the magnet configuration is evaluated with relation to the magnetic …

Needle Localization For Breast Biopsy: The Patient's Experience, Marian De Walt Morgan

Psychology Theses & Dissertations

The needle localization procedure for breast biopsy (NLP) can be painful and distressing for some women. This study was carried out to learn what factors might increase or decrease NLP pain and distress, and to gain insight into possible interventions to make the procedure more comfortable for all patients. One hundred and thirty-eight women were surveyed following breast needle localization at two central Virginia hospitals. The influence of eight variables (lidocaine, self-regulation, anxiety, worry about breast cancer, breast tenderness, finding mammography painful, difficulty with surgery, and distress of blood drawing) on four outcome variables (pain incidence, pain intensity, pain unpleasantness, …

Downsizing The Right To Petition, Gary S. Lawson, Guy I. Seidman

Faculty Scholarship

The First Amendment provides that "Congress shall make no law... abridging.., the right of the people.., to petition the Government for a redress of grievances."1 Unlike the First Amendment's speech, press, and religion clauses, this "Petitions Clause" has not spawned an extensive body of case law or academic commentary. The right to petition has been, in many ways, the First Amendment's poor relation.

The Dynamic Properties Of Confined Antiferroelectric Liquid Crystal Investigated By Photon Correlation Spectroscopy, Yuri Panarin, C. Rosenblatr, F.M. Aliev

Articles

Dynamic light scattering was used to examine ferrielectric liquid crystalline phases in porous media. Whereas in larger pores (200 Å) ferrielectric phases were observed, they were not found in the smallest pores (200 Å). Additionally, the temperatures of SmC - SmA phase transition were found to be suppressed in the pores relative to bulk, while SmCA - SmCγ phase transition is not affected by the confinement. These observations have been explained by the structural aspects of antiferroelectric liquid crystalline materials in a confined geometry and show the importance of long range electrostatic interaction for existence of ferrielectric phases.

Succession By Estoppel: Hong Kong's Succession To The Iccpr, Peter K. Yu

Articles

No abstract provided.

Harding University School Of Education Graduate Catalog, 1999-2000, Harding University

Harding Academic Catalogs

Academic catalog for the graduate education program at Harding University.

Harding University Catalog 1999-2000, Harding University

Harding Academic Catalogs

Academic catalog for the undergraduate programs at Harding University.

The Flame, Winter 1999, Mennonite College Of Nursing

The Flame (1985-present)

The Flame is a newsletter of Illinois State University's Mennonite College of Nursing

Adsorbtion Of Total Petroleum Hydrocarbons Contaminated Water With Granular Activated Carbon, Adedeji O. Adeyoye

Open Access Master's Theses

This study evaluated the effectiveness of granular activated carbon in treating hydrocarbons contaminated groundwater. Contaminated groundwater samples were obtained from the airfield refueling area of the former Davisville - Quonset Point Naval Complex at North Kingstown, R.I. Previous studies on the site showed the contaminants as a mixture of JP 5 and aviation fuel, but because of the changes that might have taken place within the constituents of the groundwater contaminants due to aging, volatilization, exposure and interaction with the soils minerals and groundwater, the contaminants are characterized as Total Petroleum Hydrocarbons (TPH).

This study conducted isotherm studies on the …

The Fourteenth Decade: Illinois State University, 1987-1997, Mark Wyman

Illinois State University History Books

Table of Contents: Leadership Under Fire – A Technology Revolution – Challenges for Faculty and Staff- Student Life – Serving the Broader Community – Index

The Relationship Between Phonemic Awareness And Preschool Children's Literacy Activities, Cheryl M. Geurts

Dissertations and Theses @ UNI

The purpose of the current study was to investigate the relationship between preschool children's phonemic awareness and the literacy activities in which they choose to engage. Children (N=l4) in the study were observed twice weekly for 12 weeks in the normal preschool environment. Data collection was divided into two phases. The first phase consisted of watching one child at a time for 15 minutes and recording everything that child did during that time. The next phase c~ data collection consisted of watching the entire class and indicating on checklists what the children were doing during free play, circle time, and …

Illinois State: For Alumni Of Illinois State University, Winter 1999-2000, Illinois State University, University Marketing And Communications

State: The Magazine of Illinois State University (1999-present)

Illinois State University alumni magazine

The Use Of Brief Questionnaire In The Diagnosis Of Attention Deficit. [Uso De Un Cuestionario Breve Para El Diagnóstico De Deficiencia Atencional], David Pineda, Gloria C. Henao, I. C. Puerta, Silvia Mejia-Arango, Luisa F. Gomez, M. L. Miranda, Monica Rosselli, Alfredo Ardila, M. A. Restrepo, L. Murrelle

School of Medicine Publications

Introducción: Aunque la Asociación Americana de Psiquiatría ha definido los síntomas que conforman las dimensiones de la deficiencia de atención (DDA), no existe en español un instrumento cuantitativo para evaluar estos síntomas en los sujetos de la población general.

Objetivo: Determinar si una lista de síntomas para la DDA define las tres dimensiones de los síntomas de la DDA en una muestra representativa de una población escolar colombiana.

Pacientes y métodos: Se llevó a cabo una selección estratificada, probabilística y representativa de los niños y adolescentes (4 a 17 años) escolarizados de la ciudad de Manizales, Colombia. El censo del …

Cd-Rom Filings At Trial And Beyond, Clint F. Sare

Computer Law Review and Technology Journal

For motions and briefs, using digital formats - such as a CD-ROM format - may provide significant benefits. Very few courts, however, accept electronic documents for filing in place of paper documents. Thus, for now, computer media may be used only to supplement those traditional filings. This paper discusses the following issues related to CD-ROM filings: (1) when CDROM filings may be allowed in trial and appellate courts; (2) what the disk may and should contain; and (3)whattechnical requirements may apply to such CDROM filings.

Because CD-ROM filings are far from standard, and are sometimes unacceptable, this article is necessarily …

Structuring Time And Task In Electronic Brainstorming, Alan R. Dennis, Jay E. Aronson, William G. Heninger, Edward D. Walker Ii

Faculty Publications

There are many ways in which a GSS can beused to support group brainstorming. This paper reports the results of an experiment that manipulated task structure and time structure. Groups electronically brainstormed on intact tasks(where all parts of the task were presented simultaneously) or on partitioned tasks (where three subcategories of the task were presented to thegroups). The time periods in which groups worked were either one 30-minute time period or three 10-minute periods separated by two-minute breaks. Groups in the partitioned task treatment generated 40% more ideas, but there were no time effects. These differences are attributed to the …

Annual Report 1 September 1998 - 31 August, 1999, Dublin Institute Of Technology

DIT Annual Reports

No abstract provided.

Facing Challenges: Irish Public Television In The Digital Age, Ellen Hazelkorn

Books/Book chapters

This paper traces some of the main challenges facing public television in Ireland.