Detection of parasite eggs from a moat encircling the royal palace of Silla, the ancient Korean Kingdom

We conducted a paleo-parasitological study on soil samples from the ancient moat ruins of Weolseong palace, of the Silla Dynasty (BC 57–AD 935) of Korea. Based on the cultural remains found in the mud-soil layer, the layer was precipitated onto the floor of a moat between the 5th and 8th centuries AD. We found Trichuris trichiura eggs only in that mud-soil layer, whereas no parasite eggs were identified in the other archaeological strata of the ruins. As T. trichiura eggs are shed only in human feces, we speculated that palace toilet contents were continually drained into the moat; therefore, at a certain point in time after construction, the moat finally became a ditch around the palace. Structures in the stone embankments of the moat, possibly designed to make the water flow continuously in one direction, might reflect the Silla people's efforts to alleviate the ever-increasing problems inherent in a moat.     

Environmental Regulations and Multinational Corporations' Foreign Market Entry Investments

In this study, we examine how differences in environmental regulation characteristics are linked to multinational corporations' (MNCs) foreign market entry (FME) investments decisions around the world. We rely on a data set with 29,303 observations from 94 European Fortune Global 500 companies operating across 77 countries during the period 2001–2007. We found that MNCs are more likely to enter countries with more certain—i.e., clearer and more stable—environmental regulations than those of their home countries. Results also suggest that there is a higher level of MNC entry into foreign countries with environmental regulations that are more stringent than those of their home countries. This finding challenges the controversial but commonly held view that more stringent environmental regulations deter MNCs' FME investments. Notably, the magnitude of the regulatory certainty relationship with MNCs' FME investments is larger than that of regulatory stringency. Findings also indicate that the increased tendency of MNCs to enter countries with more stringent environmental regulations is higher in more democratic countries and for cleaner industry firms.     

Bioarchaeological Investigation of Possible Gunshot Wounds in 18th Century Human Skeletons from Korea

Notwithstanding the relative abundance of bioarchaeological evidence of pre‐20th century gunshot wounds discovered at European and American archaeological sites, similar findings in East Asian countries have been very rare. In this study, we report evidence of possible gunshot wounds sustained by two individuals buried in Joseon tombs of Korea. The shapes of the trauma seemed to indicate low‐velocity projectiles, most likely musket balls. To our knowledge, this is the first bioarchaeological report specifically concerning possible gunshot‐wound evidence in East Asian skeletons recovered from archaeological fields. Copyright © 2011 John Wiley & Sons, Ltd.     

Amplification and sequencing of Trichuris trichiura ancient DNA extracted from archaeological sediments

Despite high prevalence of Trichuris trichiura infection, PCR-based analysis on T. trichiura from archaeological samples has not been established so far. In the present study, we sought to perform PCR-based amplification of T. trichiura aDNA using the sediments from medieval tomb of Korea. The presence of Trichuris eggs were first detected by microscopic observation; then confirmed by PCR-based aDNA analysis. Obtained sequence showed 100% homology to that of the small subunit ribosomal RNA (SSUrRNA) gene of T. trichiura but distinct from that of other Trichuris species. PCR-based aDNA analysis in this study can serve as effective method to confirm the presence of T. trichiura eggs in the soils or coprolites collected from archaeological sites.     

Possible rheumatoid arthritis found in the human skeleton collected from the tomb of Joseon Dynasty,Korea, dating back to the 1700s AD

We report a possible rheumatoid arthritis (RA) case found in a Korean Joseon Dynasty (1392–1910) tomb encapsulated by a lime‐soil mixture barrier (LSMB). The tomb is thought to have been constructed during the 1700s AD (1760 AD by carbon dating). In our anthropological examination, joint destruction, erosion or fusion (signs of polyarthritis) were identified mainly in the peripheral skeleton. Especially in both sides of the wrist bones, severe destruction/joint fusion possibly caused by polyarthritis was observed. A similar polyarthritis pattern also was seen in the right foot bones, even though we failed to confirm this symmetry due to the missing left foot bones. Despite these findings, signs suggestive of polyarthritis are very rarely seen in axial bones, even though bony fusions are found in the atlanto‐occipital joint or thoracic vertebrae (TV) 9–10. By the osteological signs observed in this case, the individual, a female, might have been suffering from a very late stage of RA and died in her 40s, even though other forms of chronic arthritis could not be ruled out completely. Though the current case could not provide evidence to decisively settle the debates on the antiquity of RA, our report could be a stepping stone for forthcoming studies on RA cases found in East Asian countries. Copyright © 2009 John Wiley & Sons, Ltd.     

Ectopic paragonimiasis from 400-year-old female mummy of Korea

Of the parasite eggs discovered in ancient samples from Korean archaeological sites, Paragonimus spp. are of particular importance in that they are regarded as one of the most insidious trematode infection sources. Although their infection prevalence decreased rapidly in the early 20th century, archaeoparasitological studies on the species are still required, as historical knowledge of paragonimiasis remains far from comprehensive. Fortunately, we recently were given a chance to examine a medieval Korean mummy in a good state of preservation. Using morphological techniques, we discovered evidence of ectopic paragonimiasis in the sample from the 17th-century female. When the ITS 2 gene was extracted, amplified and sequenced from Paragonimus eggs, it showed 100% homology to the sequences of modern Paragonimus westermani reported from Korea and Japan, forming a cluster distinct from South Asian P. westermani. Our report is the first-ever analysis of ancient Paragonimus DNA from any archaeological field in the world. The ectopic paragonimiasis diagnosis made in this study, especially involving the liver sample, also is the first of its kind in archaeoparasitology.     

Diffuse idiopathic skeletal hyperostosis cases found in Joseon Dynasty Human Sample Collection of Korea

Diffuse idiopathic skeletal hyperostosis (DISH) is a disorder showing hyperostosis of the spinal column and ossification of extraspinal ligaments or tendons. The prevalence of DISH has been found to be higher in historic peoples of the upper‐ and ruling classes, and in fact was closely correlative with nutritional and high‐caloric diets. DISH is also known to be a function of genetic factors; as such, there have been very few cases of DISH found among the specimens of Asian skeletal collections. In our osteoarchaeological study on the Joseon Dynasty Human Sample Collection (JDHSC), we found four DISH instances among the 96 cases (4.17%) we examined. This prevalence is not so different from those discovered in already‐published studies on collections in Europe and other regions. However, as already stated, it must be considered that most of the JDHSC individuals we examined were remains of people from the highest social classes of 16th–18th century Joseon society. Therefore, when collections from medieval European monastic sites, the appropriate control from well‐fed populations, were used for comparison, the prevalence of DISH was found to be far lower among the JDHSC. Reports on DISH from examinations of collections in Asian countries have been spotty, leaving gaps in the social‐strata spectrum. Further researches into the prevalence of DISH among the different social strata of ancient or medieval Asian peoples are still required. Copyright © 2010 John Wiley & Sons, Ltd.     

Continuities in Transition: Ethnicity,Language and Labour Market Inequalities in Kyrgyzstan

Ethno-racial and linguistic boundaries have major implications for socio-economic well-being throughout the world, yet their specific effects vary greatly across contexts. The countries that were once part of the Soviet Union have seen dramatic transformations yet also exhibited remarkable continuities from the socialist era. This article contributes to cross-national evidence on the roots and expressions of ethno-racial socio-economic inequalities and on nation building and nationalism in the post-Soviet context. It uses data from two identically designed nationally representative surveys conducted in Kyrgyzstan in 2011 and 2017 to investigate patterns and trends in ethnic and linguistic disparities in employment by occupational type and economic sector and in earnings among men and women. The authors find that despite government policies to promote the advancement of the nation's titular majority, Kyrgyz, and to encourage the use of its language, the ethno-linguistic economic inequalities inherited from the Soviet era — privileged positions of the European-origin minority and of Russian-speaking Kyrgyz — were still potently present in the earlier survey. While variations in types of occupation and employment sectors tended to diminish between the two surveys, the ethno-linguistic differences in earnings remained very pronounced, even after controlling for other factors. The authors relate these findings to the extant scholarship and reflect on their implications for our understanding of post-socialist transitions.