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As part of the Anson Street African Burial Ground Project, we characterized the oral microbiomes of twelve 18th century African-descended individuals (Ancestors) from Charleston, South Carolina, USA, to study their oral health and diet. We found that their oral microbiome composition resembled that of other historic (18th-19th century) dental calculus samples but differed from that of modern samples, and was not influenced by indicators of oral health and wear observed in the dentition. Phylogenetic analysis of the oral bacteria, Tannerella forsythia and Pseudoramibacter alactolyticus, revealed varied patterns of lineage diversity and replacement in the Americas, with the Ancestors carrying strains similar to historic period Europeans and Africans. Functional profiling of metabolic pathways suggested that the Ancestors consumed a diet low in animal protein. Overall, our study reveals important insights into the oral microbial histories of African-descended individuals, particularly oral health and diet in colonial North American enslavement contexts. Oral microbiomes from dental calculus of 18th century African-descended individuals in Charleston, South Carolina (USA), yield insights into their health and diet through metagenomic sequencing, phylogenetic analysis and functional profiling. [ABSTRACT FROM AUTHOR]

Existing literature provides insight into the nature and extent of plagiarism amongst undergraduate students (e.g., Ellery, 2008; Parameswaran & Devi, 2006; Selwyn, 2008). Plagiarism amongst graduate students is relatively unstudied, however, and the existing data are largely based on self-reports. This study investigated the rates and potential causes of plagiarism amongst graduate students in master's and doctoral programmes in science, technology, engineering, mathematics, and science or mathematics education by examining actual research proposals written by graduate students. Results indicate that plagiarism is a prevalent issue at each of the three university sites sampled and across all of the investigated disciplines. Fine grained analyses suggest that this plagiarism may be largely unintentional and due to a lack of disciplinary enculturation. Specifically, participants that plagiarised had approximately one less semester of research experience than graduate students who did not plagiarise. Furthermore, participants who lacked primary literature in their research proposals were significantly more likely to plagiarise and often used inappropriate citation styles. Follow-up correspondence with participants indicates that participants plagiarised, in part, because they lacked an awareness of the role of primary literature in the research process. This suggests that explicit training in the role and use of primary literature may provide an opportunity for programmes or mentors to accelerate the development of graduate students' research skills. This study also revealed that plagiarism was more common amongst English as a Second Language (ESL) participants. Potential causes of plagiarism and solutions to address plagiarism among the ESL population will be discussed. [ABSTRACT FROM AUTHOR]