BULK STABLE LIGHT ISOTOPIC RATIOS IN RECENT AND ARCHAEOLOGICAL RESINS: TOWARDS DETECTING THE TRANSPORT OF RESINS IN ANTIQUITY?*

We have applied and refined methods for the determination of bulk hydrogen, carbon and oxygen isotope ratios in modern and archaeological resins. The modern resins have a wide range of isotopic values and vary within the same tree, between individual trees, with species and location. For all isotopes measured, there is a general trend of increasing depletion of the heavier isotope with increasing altitude. There is also a linear trend between depletion of δD and δ¹³C values with increasing latitude; this trend is less clear for oxygen, but is related to the meteoric water line. Two case studies using archaeological resins known or suspected to have been transported in antiquity have been investigated to determine whether isotopic signatures can assist in pinpointing the geographical origin of the resin: Pistacia sp. resin from Canaanite amphorae imported into Egypt from known geographical locations in the eastern Mediterranean during the Late Bronze Age, and Roman amphorae sherds lined with Pinus sp. resin from sites ranging from Britain to the eastern Mediterranean. These results show separate groupings between the two resin types (pine/pistacia) and between the modern/archaeological resins. Some archaeological samples are distinct from the others and the modern resins show differences between geographical areas. However, there are no clear patterns relating the different Canaanite fabrics or the suggested manufacturing site of the Roman amphorae.     

INVESTIGATING SEASONALITY AND SEASON OF BIRTH IN PAST HERDS: A REFERENCE SET OF SHEEP ENAMEL STABLE OXYGEN ISOTOPE RATIOS

Intra‐tooth sequential analysis of enamel δ¹⁸O is currently used to investigate birth seasonality in past animal populations, offering new insights into seasonal availability of animal resources, herd management and seasonality of site occupation. Reference data sets are still required to address two major difficulties: (1) that inter‐individual variability in the record of the seasonal cycle is affected by tooth size; and (2) that the season of birth cannot be directly estimated from the timing of tooth growth, because of a delay in enamel mineralization. We present a data set acquired on the lower second molar of 10 modern sheep from Rousay (Orkney) born within a few weeks of each other in April/May and submitted to the same environmental conditions until death. All sheep have recorded a sinusoidal pattern of δ¹⁸O variation spanning approximately a year. From the difference between the expected and the measured time sequence, the delay of enamel mineralization is estimated to be 5–6 months. The data set is then described using a model mainly based on a cosine function. The period, corresponding to the length of the M2 crown formed over a year, averaged 35.8 mm. A very slight variation of tooth growth rate with time and no attenuation of the isotopic signal towards the cervical margin of the crown could be detected in this data set. The lowest δ¹⁸O values, corresponding to the sheep's first winter, were tracked at a distance from the enamel/root junction that varied between 23.0 and 30.3 mm (x_min mean = 27.6 mm); the highest δ¹⁸O values, corresponding to the sheep's second summer, were between 6.3 and 11.6 mm (x_max mean = 9.9 mm). Most of the variability can be attributed to tooth size. When normalized on the period, x_min and x_max are 0.28 (± 0.05) and 0.78 (± 0.05) on average, meaning that the Rousay sheep have recorded the minimum and maximum δ¹⁸O values on average at 78% and 28%, respectively, of the end of the periodic cycle recorded in the second molar.     

BRONZE AGE CHILDHOOD MIGRATION OF INDIVIDUALS NEAR STONEHENGE,REVEALED BY STRONTIUM AND OXYGEN ISOTOPE TOOTH ENAMEL ANALYSIS*

Contrasting lifestyles are recorded by the isotope composition of Bronze Age Beaker people (c. 2500–2000 bc ) from three burial sites (Boscombe Down, Normanton Down and the ditch around Stonehenge) at or near to the Stonehenge monument in Wiltshire, southern England. Seven individuals (three adults, a sub‐adult, two juveniles and an infant) were recovered from a single grave at Boscombe Down. Strontium and oxygen isotope analysis of tooth enamel from two teeth (a premolar and third molar) from each of three of the adults in this grave (referred to as Boscombe Bowmen) show that they had all shared a pattern of mobility and migration during their lives. The three adult males spent their early childhood (as represented by data from the premolar teeth) in an area with a radiogenic ⁸⁷Sr/⁸⁶Sr isotope signature of around 0.7135. They each then moved, during early adolescence (as represented by the third molar results), to a less radiogenic area, where they acquired an ⁸⁷Sr/⁸⁶Sr signature of around 0.7112. This implies that they must then have travelled to the Stonehenge area of Wiltshire at a later time in their lives. Wales provides the closest area with rocks that supply suitable ⁸⁷Sr/⁸⁶Sr ratios and δ¹⁸O isotope compositions for these individuals, although other areas of Palaeozoic rock, such as Scotland and parts of Europe, cannot be ruled out. Enamel from the two juveniles from the Boscombe Down burial yields ⁸⁷Sr/⁸⁶Sr ratios of 0.7098 and 0.7099, and strontium concentrations for both of 55 ppm. The very close match of the data for the two juveniles supports the possibility that they were raised in the same environment. The difference in strontium isotope data between the juveniles and three adult males described above shows that the children did not come from the same homeland as the adults with whom they share a grave. The two adult males from the single burials at Normanton Down, and from Stonehenge itself, had static lifestyles and show no evidence of migration, in contrast to the Boscombe Bowmen. Their oxygen and strontium data are consistent with a childhood in the Stonehenge area.     

IN VITRO DECOMPOSITION OF BONE COLLAGEN BY SOIL BACTERIA: THE IMPLICATIONS FOR STABLE ISOTOPE ANALYSIS IN ARCHAEOMETRY*

To understand biogenic collagen type I decomposition and to establish how diagenesis may bias archaeometric data, modern mammalian bone was inoculated with a selection of ubiquitous soil bacteria. The presence of exogenous microbial biomass in the inoculated specimens was then checked microscopically prior to collagen extraction. The experimentally degraded bone collagen showed altered amino acid compositions, attributable to the selective breakdown of certain amino acids by the bacteria. While both the bulk collagen extract and the single amino acids exhibited shifts to more negative δ¹³ C-values, enrichment was recorded for general δ¹³ N, and a depletion trend relative to unaltered collagen was observed for individual amino acid δ¹³ N. One explanation for the enrichment of the global δ¹⁵N-values is cleavage of peptide bonds, which leaves ¹⁵ N within the substrate, while the change of ¹³C is mostly due to the altered amino acid composition. On the other hand, possible repolymerization of cleavage products under experimental conditions may also be responsible for the depletion trend of individual amino acid δ¹³C- and δ¹⁵ N-values. This paper discusses the results as a basis for the development of a method for the reconstruction of the isotopic abundance of the original collagen, using the amino acid composition of the degraded product, the contribution of individual amino acids to its global δ-values and of isotope discriminations implied in the microbial decomposition.     

STABLE CARBON ISOTOPE MEASUREMENTS OF THE CARBOXYL CARBONS IN BONE COLLAGEN*

In order to explore the possibility that intramolecular differences in the δ¹³C value of bone collagen can provide useful infomation for isotopic dietary analysis, a method for reliably measuring the δ¹³C value of the peptide-bonded carboxyl carbons in collagen was developed and applied to a wide range of modem and ancient species, including humans. Carboxyl carbons were selectively removed as CO₂ by decarboxylation of collagen hydrolysates with ninhydrin (2,2-dihydroxy-l,3-indanedione). Carboxyl carbons were usually isotopically heavier than the total carbon in the collagen, with differences ranging from -0.9 to 4.0%c. Animals at higher trophic levels and with more positive δ¹⁵N values usually had smaller differences than the lower animals while humans had the largest range, reflecting their larger range of diets.     

Ulama in Islamic Law‐Making and Adjudication in Contemporary Egypt

The article examines the legislative and judicial tasks of Islamic jurists and how they carried it out in constitutional or general legal structure. While the Pakistani experiment was inspired by the Iranian model of jurists' involvement in legislatures, Egypt took a different path by not recognizing any official role for Islamic jurists with ambiguous recognition of Islamic jurisprudence. The legislative role could take the form of incorporating Islamic jurists into the legislature, establishing a committee partially made up of Islamic jurists, or handing over some legislative task to an Islamic jurisprudential institution. Despite the fact that Islamization was intended to respond to the people's requests, it employed autocratic and authoritarian mechanisms. The project attempted to replace the typical class of socially recognized jurists with appointed committees entrusted with Islamic codification. The experiment was challenged for its operation and its Islamicity but never introduced Shari'a courts or Islamic clerical legislation.     

Double‐Thinking and Contradictory Arrangements in Iranian Law and Society

Although thinking double thoughts and living dual lives are not specifically Iranian traits, Iranians have, nevertheless, become more susceptible to them for historical reasons, which may be traced back to when Persians became Muslims. The gradual normalization of double‐thinking over the centuries has given rise to social and political patterns of behavior and institutional arrangements which oscillate between opposing regimes of truths and different sets of ethical concerns, often without merging them into a new process. Once double‐thinking is normalized at the level of society, it helps people to cope with the cognitive dissonance they experience in circumstances where it is difficult to change attitude and behavior. It also affects the organization of society by making contradictory arrangements appear normal. It promotes reflexive thinking and subversive action as much as it facilitates misrecognition of sociopolitical suppression and legitimization of symbolic violence. This state of affairs generates a form of modernity which appears, at least on the surface, to be comfortable with contradictory social arrangements, while deep down it remains ill at ease with its inner contradictions.     

Electoral Pluralism,Social Division and the 2016 Parliamentary Elections in Jordan

Representing one of the most stable regimes in the Middle East, Jordan has been undergoing a process of political liberalization since 1989. Due to the so‐called East Bank‐West Bank cleavage that followed by the influx of Palestinian migrants to Jordan, the country has also come to epitomize a divided society. Within this context, this paper aims to analyze the ongoing prospects for democratization in Jordan through an examination of four persistent debates shaping its electoral pluralism: those over social/identity division, electoral law as a regime‐survival mechanism, the role of the Ikhwan and the IAF's electoral boycotts, and electoral apathy. Finally, the impact of the Arab upheavals/revolts on restructuring the process of political reform — as well as opposition in the kingdom in the post‐2011 era — will be explored with reference to the changing dynamics of Islamist opposition.     

Public Policy Issues and Campaign Strategies: Examining Rationality and the Role of Social Media in a Legislative Election Within a Middle Eastern Context

While most studies from western countries emphasize rationality in electoral behavior, the present study proposes that rationality is also a driver of candidates’ behavior in a non‐Western context. The purpose of the present study is to map campaign content as well as campaign strategies of 214 candidates in the 2015 United Arab Emirates legislative elections. The qualitative analysis showed rational consideration drove the selection of both campaign strategies and public policy positions. Candidates decided to include patriotism and social and economic policy issues in their campaigns to attract votes. In addition, while candidates utilized social meda in their campaigns hoping to maximize their voter outreach, doing so was not necessarily decisive in garnering more votes. Thus, juxtaposed with social meda channels like Twitter, Facebook, Instagram, YouTube, SnapChat, and GooglePlus, traditional campaigning strategies remained very potent.     

From Democratization to Securitization: Post‐Arab Spring Political Order in the Middle East

This article examines the question: why and how the wave of democratization in the Middle East has receded, giving way to the prioritization of security in the post‐Arab Spring by conducting analyses at three levels: societal, state, and international. By applying the main concepts and theories found in the literature on democratization and securitization and by analyzing the Bertelsmann Stiftung's Democracy Status Index, the Arab Barometers Survey, and the Arab Opinion Survey, the article concludes that: at the societal level, the tragic unfolding of events after the Arab Spring prohibits the public from pushing a reform agenda; at the state level, the post‐Arab political environment raises doubts among the ruling elite about how far political reforms should be extended; and at the international level, with the rise of new security threats, international pressure on Middle East countries to democratize has been restrained, giving way to security cooperation as the top priority.     

FROM SUSA TO ANURADHAPURA: RECONSTRUCTING ASPECTS OF TRADE AND EXCHANGE IN BITUMEN‐COATED CERAMIC VESSELS BETWEEN IRAN AND SRI LANKA FROM THE THIRD TO THE NINTH CENTURIES AD*

In contrast with artefactual studies of long‐distance trade and exchange in South Asia during the Prehistoric and Early Historic periods ( Ardika et al. 1993 ; Gogte 1997 ; Krishnan and Coningham 1997 ; Tomber 2000 ; Gupta et al. 2001 ; Ford et al. 2005 ), few scientifically orientated analyses have focused on artefacts from the region's Historic period. During excavations at the ancient city of Anuradhapura, Sri Lanka, a number of buff ware ceramics with a putative organic coating on the interior were recovered ( Coningham 2006 ). Dated stylistically to between the third and ninth centuries ad , analysis of the coatings using gas chromatography–mass spectrometry (GC–MS) and stable isotope analysis (carbon and deuterium) confirmed that the coatings are bitumen—an organic product associated with petroleum deposits. There are no known bitumen sources in Sri Lanka, and biomarker distributions and isotopic signatures suggest that the majority of the samples appear to have come from a single bitumen source near Susa in Iran. The relationship between the bitumen coatings and the vessels is discussed, and it is suggested that the coatings were used to seal permeable ceramic containers to allow them to transport liquid commodities. This study enhances our knowledge of networks of trade and exchange between Sri Lanka and western Asia during Historic times.