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H. L. Hunley: recovery operations ROBERT S.NEYLAND and HEATHER G.BROWN (eds) 348pp., 185 figures, 14 tables,CreateSpace Independent Publishing Platform, 2017, $35/£27.92 (sbk), ISBN 978‐1542856096, or free pdf from https://www.history.navy.mil/ 下载免费PDF全文
ANTONY FIRTH 《International Journal of Nautical Archaeology》2018,47(1):247-248
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Concerns about climate and energy security are leading to increased government intervention in the energy sector, in particular as they relate to the choice of energy supply options. While many of these options will improve both energy and climate security, many measures will benefit one while harming the other. This raises an important question for governments and energy planners: how can conflicts between climate and energy security be resolved? This article outlines some of the barriers and problems that may arise as governments and companies try to address climate and energy security concerns simultaneously in various energy supply areas. It concludes by arguing against choosing one objective over the other, and by outlining steps that can be taken to help resolve conflicts between the two agendas. 相似文献
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ω‐(o‐Alkylphenyl)alkanoic acids are known to form in vitro from triunsaturated fatty acids following protracted heating. These compounds have recently been identified in absorbed lipid extracts obtained from archaeological pottery vessels, providing a potentially valuable new class of indicator for the processing of commodities, such as marine oils, which contain high abundances of polyunsaturated fatty acids. Experiments were conducted to assess whether ω‐(o‐alkylphenyl)alkanoic acids form when pure compounds and complex triacylglycerol mixtures are heated with a fired clay. The results demonstrate that ω‐(o‐alkylphenyl)alkanoic acids are only produced following heating of unsaturated fatty acids (tri‐, di‐ and monounsaturated species) or complex unsaturated fatty acyl lipids at around 270°C. Heating saturated fatty acyl lipids does not yield ω‐(o‐alkylphenyl)alkanoic acids. Thus, when searching for evidence for the processing of marine derived animal fats in archaeological pottery vessels, it is essential that: ω‐(o‐alkylphenyl)alkanoic acids of carbon length C18 and C20 should be present, ideally with C22 also detectable (if only in trace abundances), together with at least one of the three isoprenoid fatty acids (phytanic, pristanic or 4,8,12‐tetramethyltridecanoic acid). 相似文献
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Interdisciplinary Archaeological Research Programme Maasvlakte 2, RotterdamBOORrapporten 566 J. M. MOREE and M. M. SIER (Eds) with 19 Contributors 417 pp., full colour illustration Gemeente Rotterdam, 2015, available to download at http://www.rotterdam.nl/Clusters/Stadsbeheer/Images%202015/BOOR/Pdf/BR566_Maasvlakte2_English.pdf 下载免费PDF全文
ANTONY FIRTH 《International Journal of Nautical Archaeology》2016,45(2):481-481