196,207 research outputs found
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
New U-series results for the speleogenesis and the Palaeolithic archaeology of the Almonda karstic system (Torres Novas, Portugal)
No full textThe Almonda karstic system is an extensive network of cavities associated with the spring of the Almonda River. Among those of archaeological interest, the lowermost, 5–15 m above the current spring, contain deposits of Upper Palaeolithic and Holocene age. Higher up in a 70 m high escarpment, the labyrinth of passages features several collapsed cave entrances, two of which have been cleared for archaeological excavation: the Gruta da Aroeira/Galerias Pesadas/Brecha das Lascas complex of Acheulean localities, and the Middle Palaeolithic site of Gruta da Oliveira. U-series dating of speleothems associated with these deposits places the Acheulean of the Almonda beyond 390 ka, dates the palaeophreatic level of ?40 m above the extant outlet back to a time before 200 ka, and constrains the accumulation of the Gruta da Oliveira sediment fill to between 23 ka and at least 102 ka. Bones from Gruta da Oliveira layer 8, which contains the uppermost human occupation of the site, were dated to the 34–40 ka range by U-series (Diffusion/Adsorption), in good agreement with available radiocarbon results. Combined with evidence from other sections of the system, these results set at half a million years ago or more the earliest human settlement of the Atlantic façade of Iberia, provide the first secure chronometric evidence for the emergence of the Acheulean in the peninsula (during Marine Isotope Stage 12 at the latest), and support the regional persistence of a Neanderthal-associated Middle Palaeolithic beyond 41.5 ka (the time of emergence elsewhere in western and central Europe of the Protoaurignacian, widely assumed to be modern human-related). U-series dating of speleothems collected in the inner passages of the system suggests uninterrupted speleothem formation through the Middle and Upper Pleistocene, enabling the construction of a high-resolution continental palaeonvironmental record for comparison with the evidence from the deep sea cores obtained off the Portuguese coas
A Bacillus subtilis secreted protein with a role in endospore coat assembly and function
No full textA Bacillus subtilis secreted protein with a role in endospore coat assembly and function
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Interactions among CotB, CotG, and CotH during assembly of the Bacillus subtilis spore coat
No full textSpores formed by wild-type Bacillus subtilis are encased in a multilayered protein structure (called the coat) formed by the ordered assembly of over 30 polypeptides. One polypeptide (CotB) is a surface-exposed coat component that has been used as a vehicle for the display of heterologous antigens at the spore surface. The cotB gene was initially identified by reverse genetics as encoding an abundant coat component. cotB is predicted to code for a 43-kDa polypeptide, but the form that prevails in the spore coat has a molecular mass of about 66 kDa (herein designated CotB-66). Here we show that in good agreement with its predicted size, expression of cotB in Escherichia coli results in the accumulation of a 46-kDa protein (CotB-46). Expression of cotB in sporulating cells of B. subtilis also results in a 46-kDa polypeptide which appears to be rapidly converted into CotB-66. These results suggest that soon after synthesis, CotB undergoes a posttranslational modification. Assembly of CotB-66 has been shown to depend on expression of both the cotH and cotG loci. We found that CotB-46 is the predominant form found in extracts prepared from sporulating cells or in spore coat preparations of cotH or cotG mutants. Therefore, both cotH and cotG are required for the efficient conversion of CotB46 into CotB-66 but are dispensable for the association of CotB-46 with the spore coat. We also show that CotG does not accumulate in sporulating cells of a cotH mutant, suggesting that CotH (or a CotH-controlled factor) stabilizes the otherwise unstable CotG. Thus, the need for CotH for formation of CotB-66 results in part from its role in the stabilization of CotG. We also found that CotB-46 is present in complexes with CotG at the time when formation of CotB-66 is detected. Moreover, using a yeast two-hybrid system, we found evidence that CotB directly interacts with CotG and that both CotB and CotG self-interact. We suggest that an interaction between CotG and CotB is required for the formation of CotB-66, which may represent a multimeric form of CotB
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