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The perceptions of principals, teachers, and peer coaches regarding a school district's peer coaching model and its impact on teaching practices, teacher collaboration, and teacher morale, 1991
Get PDFThis study was designed to investigate the perceptions of principals, teachers, and peer coaches regarding a metropolitan Atlanta school district's model of peer coaching and its impact on teaching practices, teacher collaboration, and teacher morale. The research design for the study was a quasi- experimental research design and a causal comparative study. Ten schools from a metropolitan Atlanta school district were selected as a sample for the study. A questionnaire was used to collect the data needed for analysis. The t_ test and an analysis of variance were used to analyze all data collected. An analysis of the data showed that teachers in control and experimental schools perceived that effective teaching practices, teacher collaboration, and good teacher morale existed in schools. Also, experimental teachers and peer coaches differed in their perceptions of teaching practices in experimental schools as determined by the Scheffe test of significant differences. The conclusions of the study were that teacher collaboration and good teacher morale exist in those schools with and without the district's peer coaching model. The district's model apparently creates an awareness among teachers. Also, an analysis of variance and a Scheffe test of significant differences indicated a difference between peer coaches and teachers in experimental schools regarding teaching practices. The study found that peer coaches scored those items on the questionnaire related to teaching practices more critically than teachers. There was no significant difference found among principals, peer coaches, and teachers on the two remaining variables of teacher collaboration and teacher morale. The implications were that peer coaches were critical of their teaching practices. This may be due to the fact that they were trained in effective teaching practices. Also, the peer coaching model studied lends itself to formal evaluation since the peer coach is trained in effective teaching practices and the teacher was not trained
Revolutionary choices: the life and art of Haki Madhubuti, 1999
Get PDFThis study examined the life and art of Black Arts Movement poet and activist Haki Madhubuti (aka Don L. Lee). His life and art are evidence that the objectives many black nationalist activists of the Black Arts Movement espoused were attainable. These objectives included, but were not limited to, the following: political and social empowerment through black unity; replacement of Western aesthetic with a black aesthetic to judge black art; strengthening of the black community through family and institutions; and acceptance of African value systems. This study was based on the premise that the Black Arts Movement was a successful artistic, political, and social movement which produced activists/artists who challenged Western aesthetics and values while promoting African- centered ones. Madhubuti is a central and commanding exemplar of the Black Arts Movement as evidenced in his body of work, entrepreneurial and educational enterprises, and work as a political activist. An interview with Madhubuti was conducted at his office at Third World Press in Chicago, Illinois in an attempt to capture his motivation and drive to continue working toward black nationalist objectives. The researcher found that Madhubuti has made deliberate choices regarding personal, professional, political, and artistic segments of his life which are in line with many of the goals and objectives espoused during the Black Arts Movement by black nationalists. In doing so, he continues the tradition of empowering and uniting black people through political activism and art, a tradition started by black activists/artists who predate the Black Arts Movement by forty years. The conclusions drawn from the research suggest that Madhubuti's work as a black nationalist, artist, entrepreneur, and committed family and community leader, is in line with the Black Arts Movement's original objectives. The research also suggests that Madhubuti's poetry and essays follow a clear pattern of evolution, as detailed in Frantz Fanon's The Wretched of the Earth
Factors that contribute to the development of successful young black males, 2003
Get PDFThis study examines the relationship between success and the emotional, psychological, and spiritual development of young black males. This study was based on the premise that in order for young black males to be successful in life they have to have a high degree of emotional, psychological, and spiritual development. A descriptive study was utilized to investigate the characteristics of successful young black males in college. Survey and interviews were utilized as the primary data gathering techniques. The researcher found that the young black males who were surveyed and interviewed did have high degree of emotional, psychological, and spiritual development. The conclusions drawn from the findings suggest that the young black males surveyed developed emotionally and psychologically through the positive relationships they have experienced in their lives. While their spiritual development is more indirectly related to the positive relationships they have experienced in their lives, it was through these relationships that they relied on the church for their spiritual development
A study of forty cases of teen age negroes with venereal infection found during a venereal disease campaign, 1900 1905, in Winston Salem, NC, 1946
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The genome organization of the Bobwhite Quail (colinus virginianus), 1981
Get PDFThe DNA of the bobwhite quail (Colinus virginianus) was examined using isopycnic centrifugation in neutral CsCl, alkaline CsCl, Hg++-Cs2SOif and Ag+- CS2SO . When quail DNA was centrifuged in neutral CsCl, two low density minor bands (satellite DNA) were detected in addition to the main band DNA. Main band DNA had a buoyant density of 1.701 g/ml. The larger of the two minor bands had a buoyant density of 1.681 g/ml (I) while the smaller of the two minor bands had a buoyant density of 1.674 g/ml (II). The main band has a G + C content of 41.8% while the satellites, I and II, have G + C contents of 21.4% and 14.2%, respectively. Thermal denaturation studies were used to confirm the base composition data obtained from the buoyant density data. Restriction endonucleases (Hind 111, EcoR 1, EcoR 11, Hpa 1, Hpa 11, Bam 1, Bgl 11, Alu 1, Hae 111, Hha 1 and Mbo 1) were used to investigate the heterogeneity of repetitive DNA's in the total bobwhite quail genome. Bobwhite quail DNA consists of a heterogeneous population which is indicative of a genome in which most of the restriction endonuclease sites are randomly distributed. However, the Hind 111 sites are non-randomly distributed as indicated by the seven discrete fragments generated. The arrangement of repetitive and non-repetitive sequences was studied in the genomic DNA of the bobwhite quail (Colinus virginianus) and the Pharoah quail (Coturnix coturnix). The reassociation kinetics of short (450-500 nucleotide) and long (2000 nucleotide) DNA fragments were studied by the hydroxylapatite method. The data indicate that the bobwhite genome consists of three kinetic components; non-repetitive (Cot& pure = 70; 70%), moderately repetitive (Cotte pure = 0.50; 10%) and highly repetitve (Cotli pure = 0.01; 20%). The genome of the Pharoah quail is similar to the bobwhite with the non-repetitve sequences accounting for 68% of the genome (Cotl2 pure = 66.6); moderately repetitive sequences constitute 12% of the genome (Cotft pure = 0.65); and the highly repetitve sequences constitute about 20% of the genome (Cot& pure = 0.012). The lengths of the repetitve sequences obtained by reassociating total DNA to Cot 40 and digesting with SI nuclease were estimated by agarose gel electrophoresis and alkaline sucrose gradients. The repetitve sequences in both species of birds are approximately 1000 nucleotides long. The interspersion of repetitive and non-repetitive or single copy sequences have been examined. The results indicate that about 20-23% of the non-repetitve sequences in fragments 2000 nucleotides long are interspersed with long repetitive sequences in the bobwhite quail. In the Pharoah quail genome approximately 25- 27% of the non-repetitive sequences are interspersed. These data indicate that the bobwhite and Pharoah quail genomes contain some highly repetitive DNA sequences which are clustered and band as distinct satellites in neutral CsCl and some repetitive sequences which are intersperse
The effect of dosage on absorption and excretion of sulfaguanidine, sulfamerazine, succinylsulfathiazole and sodium sulfathiazole in albino mice, 1967
Get PDFThe effect of dosage on absorption and excretion of sulfaguanidine, sulfamerazine, succinylsulfathiazole and sodiumsulfa-thiazole was investigated in albino mice. Five groups of adult male albino mice were injected subcutaneously, at 4, 8, 12, and 24 hr intervals with doses of 15, 30, 45, 60, 75, and 100 mg per 100 g body weight respectively with sulfamerazine, sulfaguanidine, succinylsulfathiazole, and sodium-sulfathiazole. The controls were injected subcutaneously with 0.9% saline solution. The controls did not suffer any toxic effects. Some animals died after suffering excessive convulsive body tremors, loss of body weight, reduced food intake, excretion of hematuric urine, adhesions of the duodenum to other parts of the intestines, and precipitation of sulfonamides in their bladders. Results of blood and urine analyses were obtained by the Bratton and Marshall method for determining the total and free levels of sulfonamides. N-l(1-naphthyl) ethylenediamine dihydrocholoride was used as a coupling agent for color development of the drugs. Plasma clearances were also made which indicated the varying rates of excretion of the drugs
The biochemical characterization of messenger ribonucleic acid, 1980
Get PDFSince the discovery of the 31-terminal poly (A) tail in most eukaryotic mRNAs and the 51-terminal 'cap' in all cellular eukaryotic and most eukaryotic viral mRNAs, the biochemical behavior and characterization of these eukaryotic mRNAs and their interaction with ribosome, ribosomal and non-ribosomal proteins have become more complex. Though the behavior of these mRNA molecules has been studied extensively, little is still known about the function(s) of their 'capped' and polyadenylated termini. A number of experimental approaches have been used to study the function(s) of the 51-terminal cap and the 3'-terminal poly (A) tail in eukaryotic mRNAs. Based on extensive in vitro translation studies, two main functions have emerged for the 51 -terminal cap. One is ct facilitation of mRNA entry into the initiation complex with eukaryotic ribosome; the second a protection, of mRNA against degradation by cellular nucleases. Studies involving kinetics of nuclear and cytoplasmic poly (A) labeling tend to suggest that the 3'-poly (A) tail serves as a vehicle for transport of eukaryotic mRNA across the nuclear membrane into the cytoplasm and as a protector . of mRNA against degradation by cellular nucleases. In this study, the use of 4-thiouridine, a photoaffinity binding probe, located in some unique cap analogs,,will be used to investigate the behavior of rabbit 9S-globin and polyuridylicc acid iriRNAs in both the wheat germ and rabbit reticulocyte cell-free protein-synthesizing systems. In addition, a new method involving the luciferin-luciferase (firefly) bioluminescent reaction will be used to assay the activity of the ATP: polynucleotidylexotransferase [poly (A) polymerase] and ATP substrate analogs. The results of this study show that the luciferin-luciferase (firefly) bioluminescent reaction is a useful analytical tool for assay of ATP, ATP modified substrates and poly (A) polymerase. In addition, inhibition of protein synthesis by 4-thiouridine nucleoside phosphates and synthetic cap analogs containing 4-thiouridine indicate that these thio-containing nucleotides are useful tools in further elucidating the function (s) of the 5'-terminal cap
The effectiveness of the BRL/Sullivan reading program in increasing reading achievement of the title I students at Thomas Jefferson guice elementary school, 1980
Get PDFThis study was undertaken to determine to what extent the BRL/Sullivan Reading Program is effective with the Title I students of Thomas Jefferson Guice Elementary School. The study was conducted to test the following hypothesis : The mean gains in reading achievement during the year students were enrolled in BRL/Sullivan will be significantly greater than their gains in the year before their involvement in the BRL/Sullivan Program. The subjects used in conducting this study were 31 fourth, fifth, and sixth grade boys and girls enrolled in the Title I reading program at Thomas Jefferson Guice Elementary School the year prior to and following the introduction of the BRL/Sullivan Reading Program. The instrument used in the study was the Iowa Tests of Basic Skills. The Iowa Tests of Basic Skills are eleven separate tests. The test battery is organized as follows: Vocabulary, Reading Comprehension, Language Skills, Work Study Skills, and Mathematics Skills. BRL Sullivan is a programmed approach to reading and two main components provide the essential means for individualizing instruction. They are: The Programmed Textbook a text that contains ninety-six pages, divided into four instructional units and the slider, a piece of construction paper cut to cover the answers. The student slides the slider down after making a response. The procedural steps began with a survey of Guice's student body. After the selection of the 31 subjects, their Iowa tests scores were obtained for the spring of 1975 and for the spring of 1976. These two sets of socres were recorded. The 1975 scores were subtracted from the 1976 scores to obtain a gain score. The same procedure was used with the 1976 and 1977 scores. The mean gain scores for each school year were determined and a t-test of significance was applied. It was found that there was no significant difference between the reading performance of students before and after the BRL/Sullivan Reading Program. The hypothesis that mean gains in reading achievement for students would be significantly greater was therefore refuted. The recommendations included; (1) That further study be conducted to verify or disprove the present findings concerning the Iowa Tests of Basic Skills and the BRL/Sullivan Reading Program, (2) that a much more involved longitudinal study be made of the BRL/Sullivan Reading Program and its effect on achievement scores, (3) that further study be devoted to the investigation of the effect of incorporating the BRL/Sullivan Reading Program into the regular classoom, (4) that the initial testing and screening should be done in the regular classroom, (5) that the Title I teachers, aides, principal, and regular classroom teachers should participate in workshops and in-service meetings as much as possible, and (6) that parents should be involved in the program from the beginning
