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Cytoskeletal architecture and its evolutionary significance in amoeboid eukaryotes and their mode of locomotion
Get PDFThe cytoskeleton is the hallmark of eukaryotic evolution. The molecular and architectural aspects of the cytoskeleton have been playing a prominent role in our understanding of the origin and evolution of eukaryotes. In this study, we seek to investigate the cytoskeleton architecture and its evolutionary significance in understudied amoeboid lineages belonging to Amoebozoa. These amoebae primarily use cytoplasmic extensions supported by the cytoskeleton to perform important cellular processes such as movement and feeding. Amoeboid structure has important taxonomic significance, but, owing to techniques used, its potential significance in understanding diversity of the group has been seriously compromised, leading to an under-appreciation of its value. Here, we used immunocytochemistry and confocal microscopy to study the architecture of microtubules (MTs) and F-actin in diverse groups of amoebae. Our results demonstrate that all Amoebozoa examined are characterized by a complex cytoskeletal array, unlike what has been previously thought to exist. Our results not only conclusively demonstrate that all amoebozoans possess complex cytoplasmic MTs, but also provide, for the first time, a potential synapomorphy for the molecularly defined Amoebozoa clade. Based on this evidence, the last common ancestor of amoebozoans is hypothesized to have had a complex interwoven MT architecture limited within the granular cell body. We also generate several cytoskeleton characters related to MT and F-actin, which are found to be robust for defining groups in deep and shallow nodes of Amoebozoa. KEYWORDS: cytoskeleton, amoeboid movement, microtubules, actin, immunocytochemistry, Amoebozo
Assessment of social functioning in Leake And Watts Children's Home, Incorporated, Yonkers, New York, 1963
Get PDFFactors influencing student degree completion at a historically Black university in a southeastern urban center, 2006
Get PDFThe purpose of this study was to determine the influence of instructors teaching style, student learning styles, student self-efficacy, student support services, student motivation, financial aid, campus safety, and student demographics on student degree completion. The dependent variable for this study was undergraduate student degree completion. Independent variables were instructors teaching style, student learning styles, student self-efficacy, student support services, student motivation, financial aid, campus safety, and student demographics. A descriptive statistical design involving Pearson correlation, factor analysis, and multiple regression, ANOVA, and T-test were utilized to achieve the purpose of this study. A purposeful sample of those students enrolled in the School of Education, School of Business, School of Arts and Sciences, and School of Social Work at a Southeastern Historically Black University was used (n = 151). Participants in this study were undergraduate students of the aforementioned schools. Participants completed a survey instrument developed by the researcher, Dr, Ganga Persaud, and Dr. Trevor Turner. The result of the study indicated a significant relationship between student selfefficacy, student motivation, and student gender and degree completion. Female students were more likely to persist to graduation than their male counterpart. Based on these findings, recommendations for instructors, head of departments, deans, university policy makers, and researchers were given. The study was limited to one particular institutio
A study of the visiting teacher services in the Paul Breaux High School, in Lafayette, Louisiana, from September, 1945, to June, 1947, 1948
No full textA phenomenological study of criminal behavior among adult males in the Federal prison system: implications for social work practice, 2002
No full textThis study has two primary objectives: first, to examine the characteristics of 75 offenders incarcerated at the Federal Correctional Institution in Talladega, Alabama, using the Pre-sentence Investigation (PSI) Report data, and second, to delve into the phenomenology of the offenders through a lengthy interview process. To achieve these objectives, three offenders types were constructed based on criminal history analysis: First-time Offenders, Repeat Drug Offenders, and Mixed Multiple Ofenderss. The study found that First-time Offenders were less deviant in all respects than the other two subtypes. First-time Offenders, hailing from lower-middle class environments, were relatively better educated, more skilled, employed for longer periods, and possessed more self-control than members of the other subtypes. First-time Offenders were frequently reared in intact homes with both parents present (or involved in their lives). Repeat Offenders had mostly drug convictions with or without traffic violations and misdemeanors charges. Mixed Multiple Offenders had lengthier arrest histories than other subtypes with a variety of convictions ranging from a simple battery to homicide, rape or armed robbery-indicating a more threatening, violent, and pervasive deviant and/or criminal lifestyle than First-time or Repeat Offenders. Unlike the First time Offenders, both the Repeat Drug Offenders and Mixed Multiple Offenders were relatively less educated, less skilled, employed for less periods of time or sporadically or irregularly employed, and were reared in lower class, broken homes environments with a larger number of family members present. Findings from this study provide a more in-depth understanding of what criminal behavior means to those who commit criminal acts and their life circumstances under which it occurs. These findings will enable social workers to design and implement more effective intervention strategies to assist offenders with their behavioral problem
Atlanta University Center Faculty Publications: A Brief Bibliography, February 28, 2006
Get PDFOn February 28, 2006, the Robert W. Woodruff Library and the Library Advisory Council hosted an exhibit and reception celebrating the published works of Atlanta University Center faculty. As a complement to that event, the Robert W. Woodruff Library presents this publication, Atlanta University Center Faculty Publications: A Brief Bibliography, which highlights selected scholarly and research contributions of the Atlanta University Center faculty. The celebration has become an annual event and the bibliography illustrates the richness of faculty contributions within each institution and across the Atlanta University Center community. It should be viewed as a fluid document to be updated as new contributions emerge and will be preserved on the Librarys website for future reference and use
Spelman Messenger November 1949 vol. 66 no. 1
Get PDFThe Atlanta University Center Robert W. Woodruff Library acknowledges the generous support of the Council on Library and Information Resources (CLIR) in supporting the processing and digitization of a number of historic collections as part of the projectOur Story: Digitizing Publications and Photographs of the Historically Black Atlanta University Center Institutions
Spelman College Bulletin 1946-1947
Get PDFThe Atlanta University Center Robert W. Woodruff Library acknowledges the generous support of the Council on Library and Information Resources (CLIR) in supporting the processing and digitization of a number of historic collections as part of the projectOur Story: Digitizing Publications and Photographs of the Historically Black Atlanta University Center Institutions
Spelman Seminary Catalog 1903-1904
Get PDFThe Atlanta University Center Robert W. Woodruff Library acknowledges the generous support of the Council on Library and Information Resources (CLIR) in supporting the processing and digitization of a number of historic collections as part of the projectOur Story: Digitizing Publications and Photographs of the Historically Black Atlanta University Center Institutions