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  Partner: UNT Libraries
 Language: English
 Collection: UNT Theses and Dissertations
Public safety curricula in American community colleges: Programs, problems, and prospects.

Public safety curricula in American community colleges: Programs, problems, and prospects.

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Date: August 2005
Creator: Phillips, Ted P.
Description: This study explored public safety programs in publicly controlled American community colleges. The need for accurate and complete information in an era of homeland security and defense is paramount as government, education, the private sector, and the citizenry interact to ensure a safer nation. The general purposes of this study were to compile current descriptive information on public safety programs and curricula in America's publicly controlled community colleges, and to identify problems and prospects inherent in the administration of these programs. Information is critical as community colleges continue to struggle with decreased funding and seek alternative sources of revenue. Community colleges represent a tremendous network for course delivery, such as homeland security training, but struggle to obtain the attention or the funding from the federal government. A review of pertinent literature provided the foundation of a 100-item survey questionnaire that was mailed to a random sample of 200 public safety administrators at American community colleges. The study also included a review of archival data to further describe the programs. Of the 200 instruments sent, 97 (48.5%) were completed, returned, and useable. From the literature, the survey results, and the archival data, a comprehensive list of community colleges with public safety ...
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Public School Educators' Use of Computer-Mediated Communication

Public School Educators' Use of Computer-Mediated Communication

Date: December 2000
Creator: Urias-Barker, Zelina
Description: This study examined the uses of computer-mediated communication (CMC) by educators in selected public schools. It used Rogers' Diffusion of Innovation Theory as the underpinnings of the study. CMC refers to any exchange of information that involves the use of computers for communication between individuals or individuals and a machine. This study was an exploration of difficulties users confront, what services they access, and the tasks they accomplish when using CMC. It investigated the factors that affect the use of CMC. The sample population was drawn from registered users on TENET, the Texas Education Network as of December 1997. The educators were described with frequency and percentages analyzing the demographic data. For the research, eight indices were selected to test how strongly these user and environmental attributes were associated with the use of CMC. These variables were (1) education, (2) position, (3) place of employment, (4) geographic location, (5) district size, (6) organization vitality, (7) adopter resources, and (8) instrumentality Two dependent variables were used to test for usage: (1) depth or frequency of CMC usage and amount of time spent online and (2) breadth or variety of Internet utilities used. Additionally, the users' perception of network benefits was measured. ...
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Pulling Tangled Strings: "The Puppeteer" and Other Stories

Pulling Tangled Strings: "The Puppeteer" and Other Stories

Date: August 2006
Creator: Berryman, Archer
Description: Pulling Tangled Strings: "The Puppeteer" and Other Stories is a collection of stories with strong thematic and emotional connections that includes an opening preface describing the process used when writing the stories. Each of the stories is united by a main character that desperately wants to gain control of his environment. From a character acting out a classic revenge tale on his friend to a comatose teenager victimized by an ambiguous tragedy, these are characters who have been put into difficult life situations and need to feel like they are pulling the strings in their lives again. In all cases, however, the characters come to find that control does not come easily and that the motivations for their behavior are never clear cut, even to themselves.
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Pupil Classroom Sociability and Teacher Mode of Interpersonal Interaction

Pupil Classroom Sociability and Teacher Mode of Interpersonal Interaction

Date: January 1970
Creator: Walters, Robert H.
Description: The present study was designed to provide data bearing directly on the question of the influence of the preschool experience, and specifically, teacher behavior, on pupil social behavior.
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The Pure Rotational Spectra of Diatomics and Halogen-Addition Benzene Measured by Microwave and Radio Frequency Spectrometers

The Pure Rotational Spectra of Diatomics and Halogen-Addition Benzene Measured by Microwave and Radio Frequency Spectrometers

Date: August 2010
Creator: Etchison, Kerry C.
Description: Two aluminum spherical mirrors with radii of 203.2 mm and radii of curvature also of 203.2 mm have been used to construct a tunable Fabry-Perót type resonator operational at frequencies as low as 500 MHz. The resonator has been incorporated into a pulsed nozzle, Fourier transform, Balle-Flygare spectrometer. The spectrometer is of use in recording low J transitions of large asymmetric molecules where the spectra are often greatly simplified compared to higher frequency regions. The resonators use is illustrated by recording the rotational spectra of bromobenzene and iodobenzene. In related experiments, using similar equipment, the pure rotational spectra of four isotopomers of SrS and all three naturally occurring isotopomers of the actinide-containing compound thorium monoxide have been recorded between 6 and 26 GHz. The data have been thoroughly analyzed to produce information pertaining to bond lengths and electronic structures.
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Purification and Characterization of Ascaris Suum Aldolase : An Initial Phylogenetic Study of Aldolases

Purification and Characterization of Ascaris Suum Aldolase : An Initial Phylogenetic Study of Aldolases

Date: August 1972
Creator: Dedman, John R., 1947-
Description: An efficient purification procedure of Ascaris suum muscle utilizing ion exchange column chromatography has been developed.
Contributing Partner: UNT Libraries
Purification and Characterization of Proteolytic Aspartate Transcarbamoylase (ATCase) from  Burkholderia cepacia 25416 and Construction of a  pyrB1 Knock-out Mutant

Purification and Characterization of Proteolytic Aspartate Transcarbamoylase (ATCase) from Burkholderia cepacia 25416 and Construction of a pyrB1 Knock-out Mutant

Date: December 2004
Creator: Kim, Seongcheol
Description: Burkholderia cepacia is a common soil bacterium of significance in agriculture and bioremediation. B. cepacia is also an opportunistic pathogen of humans causing highly communicable pulmonary infections in cystic fibrosis and immunocompromized patients. The pyrB gene encoding ATCase was cloned and ATCase was purified by the glutathione S-transferase gene fusion system. The ATCase in B. cepacia has been previously classified as a class A enzyme by Bethell and Jones. ATCase activity gels showed that B. cepacia contained a holoenzyme pyrBC complex of 550 kDa comprised of 47 kDa pyrB and 45 kDa pyrC subunits. In the course of purifying the enzyme, trimeric subunits of 140 kDa and 120 kDa were observed as well as a unique proteolysis of the enzyme. The 47 kDa ATCase subunits were cleaved to 40 kDa proteins, which still demonstrated high activity as trimers. The proteolysis site is between Ser74 and Val75 residues. To confirm this, we converted the Ser74 residue to an Ala and to an Arg by site-directed mutagenesis. After this primary sequence changed, the proteolysis of ATCase was not observed. To further investigate the characteristics of B. cepacia pyrB gene, a pyrB knock-out (pyrB-) was constructed by in vitro mutagenesis. In the assay, ...
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Purification of Aspartate Transcarbamoylase from  Moraxella (Branhamella) catarrhalis

Purification of Aspartate Transcarbamoylase from Moraxella (Branhamella) catarrhalis

Date: August 2001
Creator: Stawska, Agnieszka A.
Description: The enzyme, aspartate transcarbamoylase (ATCase) from Moraxella (Branhamella) catarrhalis, has been purified. The holoenzyme has a molecular mass of approximately 510kDa, harbors predominantly positive charges and is hydrophobic in nature. The holoenzyme possesses two subunits, a smaller one of 40 kDa and a larger one of 45 kDa. A third polypeptide has been found to contribute to the overall enzymatic activity, having an approximate mass of 55 kDa. The ATCase purification included the generation of cell-free extract, streptomycin sulfate cut, 60 °C heat step, ammonium sulfate cut, dialysis and ion, gel-filtration and hydrophobic interaction chromatography. The enzyme's performance throughout purification steps was analyzed on activity and SDS-PAGE gradient gels. Its enzymatic, specific activities, yield and fold purification, were also determined.
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Purification of Cyanide-Degrading Nitrilase from Pseudomonas Fluorescens NCIMB 11764.

Purification of Cyanide-Degrading Nitrilase from Pseudomonas Fluorescens NCIMB 11764.

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Date: December 2010
Creator: Chou, Chia-Ni
Description: Cyanide is a well known toxicant that arises in the environment from both biological and industrial sources. Bacteria have evolved novel coping mechanisms for cyanide and function as principal agents in the biosphere for cyanide recycling. Some bacteria exhibit the unusual ability of growing on cyanide as the sole nitrogen source. One such organism is Pseudomonas fluorescens NCIMB 11764 (Pf11764) which employs a novel oxidative mechanism for detoxifying and assimilating cyanide. A unique complex of enzymes referred to as cyanide oxygenase (CNO) is responsible for this ability converting cyanide to ammonia which is then assimilated. Because one component of the four member CNO complex was previously shown to act on cyanide independent of the other members, its characterization was sought as a means of gaining a better understanding of the overall catalytic mechanism of the complex. Preliminary studies suggested that the enzyme belonged to a subset of nitrilase enzymes known as cyanide dihydratases (CynD), however, a cynD-like gene in Pf11764 could not be detected by PCR. Instead, a separate nitrilase (Nit) linked to cyanide metabolism was detected. The corresponding nit gene was shown to be one of a conserved set of nit genes traced to a unique cluster in bacteria ...
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The Purpose and Techniques of Supervisory Evaluation of Instruction with Particular Reference to Secondary Mathematics

The Purpose and Techniques of Supervisory Evaluation of Instruction with Particular Reference to Secondary Mathematics

Date: August 1958
Creator: Rollins, James Hendrix
Description: The purpose of this study is to investigate the purposes and techniques of supervisory evaluation of instruction with particular reference to secondary mathematics.
Contributing Partner: UNT Libraries