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Fatty acids, typical to large herbivores, were isolated from a 7th century Byzantine sounding lead recovered from a shipwreck off Dor, an ancient anchorage in Northern Israel. The fatty acids survived by being sheltered in an anaerobic environment provided through a site formation process induced by the disintegrating wreck. Previously established identification criteria for fatty acids, absorbed in ceramics, were used to show that tallow was used in this navigational instrument in the Eastern Mediterranean during late antiquity. 相似文献
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Nina J. Morris Hazel Christie Jacob Barber 《Journal of Geography in Higher Education》2019,43(3):343-361
There is a widespread debate in higher education about how best to support students in becoming more active and engaged learners. Geographers have occupied a central position in these debates having long been concerned with understanding and creating teaching spaces that encourage active and experiential learning. Recent pedagogical innovations have seen a movement away from a reliance on lecturing as the key pedagogical method and a redefinition of the roles of both teacher and learner. In this paper, we look at the role that assessment, specifically assessed blogs, can play in enhancing student engagement. Drawing on interviews with Course Organizers from two case study courses, student focus groups, and course evaluation surveys we show the various ways in which blogs enhance engagement. We draw attention to how blogging enabled students to personalize their learning and make it more meaningful to them, as well as to foster greater engagement with the course materials including making connections across the course as a whole. Further, we show how blogging enabled students to develop transferable skills that would stand them in good stead for the rest of their time at university and in their future professional lives. 相似文献
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Leonor Peña-Chocarro Guillem Pérez Jordà Jacob Morales Mateos Lydia Zapata 《Environmental Archaeology》2015,20(4):379-389
AbstractThis paper presents ethnographic, historic and archaeological data from the western Mediterranean in order to explore the variability of storage methods and the various strategies that may have existed in the past in this region. The paper includes ethnographic information on traditional storage methods collected in farming communities in northern Morocco (Rif area). We record the use of plant fibres such as canes (Arundo donax), dwarf palm (Chamaerops humilis), esparto grass (Stipa tenacissima) and dis (Ampelodesmos mauritanica) to make containers. Recipients made of cow dung and unfired clay, as well as underground silos, have been also used in this region to store food. In addition, we explore historical and ethnohistorical data on the use of large storage structures, including the study of communal granaries, a particular type of granary located at inaccessible places, such as cliff faces or mountain tops, or within fortified buildings, from which harvests can be easily protected and defended. We also examine the archaeological evidence of storage strategies in the Iberian Peninsula during prehistoric times. The paper informs of the large variety of systems and materials used, the functioning of storage structures, and more generally, provides a framework for reflecting on the enormous diversity of solutions that could have existed in the past and that may have left little or none archeological traces. 相似文献
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Hugo R. Oliveira Peter Civáň Jacob MoralesAmelia Rodríguez-Rodríguez Diane L. ListerMartin K. Jones 《Journal of archaeological science》2012,39(4):828-835
The recovery of ancient DNA from archaeological wheat samples under different preservation conditions was assessed using a number of genetic markers. It was possible to amplify nuclear DNA from desiccated grains but not from charred. The desiccated grain was from a pre-Hispanic grain silo in Gran Canaria and showed excellent DNA preservation, enabling the amplification of the ribosomal DNA markers IGS and ITS, the upstream region of the HMW-glutenin locus and single-locus nuclear microsatellites. Our results demonstrated the presence of both durum and bread wheat in an assemblage of naked grain. We were also able to identify different genotypes in durum wheat and compare these with extant landraces, providing insights into the agrarian practices of the ancient Canarians and the origin of their crops. 相似文献