نتایج جستجو برای: well burial

تعداد نتایج: 1527613  

2017
Jinjin Xu Yanfei Wei Hanqing Jia Lin Xiao Decai Gong

Burial conditions play a crucial role in archaeological heritage preservation. Especially, the microorganisms were considered as the leading causes which incurred degradation and vanishment of historic materials. In this article, we analyzed bacterial diversity and community structure from M1 of Wangshanqiao using 16 S rRNA gene amplicon sequencing. The results indicated that microbial communit...

2017
Xinsheng Chen Yulin Liao Yonghong Xie Feng Li Zhengmiao Deng Zhiyong Hou Chao Wu

Clonal plants producing both clumping and spreading ramets can adjust their growth forms in response to resource heterogeneity or environmental stress. They might produce clumping ramets to retain favorable patches, or produce spreading ramets to escape from stress-affected patches. This study aimed to investigate the rarely reported concurrent effects of sediment accretion and nutrient enrichm...

2016
David I. Armstrong McKay Toby Tyrrell Paul A. Wilson

The Eocene-Oligocene transition (EOT), ~34Ma, marks a tipping point in the long-term Cenozoic greenhouse to icehouse climate transition. Paleorecords reveal stepwise rapid cooling and ice growth across the EOT tightly coupled to a transient benthic δC excursion and a major and permanent deepening of the carbonate compensation depth (CCD). Based on biogeochemical box modeling, Merico et al. (200...

2018
Jan T Wollenberg Jeff Ollerhead Gail L Chmura

Salt marshes are highly effective carbon (C) sinks and have higher rates of soil C burial (per square meter) than terrestrial ecosystems. Marsh reclamation and anthropogenic impacts, however, have resulted in extensive losses of salt marshes. Restoration of marshes drained and "reclaimed" for agriculture (referred to in Canada as dykelands) and degraded marshes can generate C credits, but only ...

Journal: :Science 2009
R F Anderson S Ali L I Bradtmiller S H H Nielsen M Q Fleisher B E Anderson L H Burckle

Wind-driven upwelling in the ocean around Antarctica helps regulate the exchange of carbon dioxide (CO2) between the deep sea and the atmosphere, as well as the supply of dissolved silicon to the euphotic zone of the Southern Ocean. Diatom productivity south of the Antarctic Polar Front and the subsequent burial of biogenic opal in underlying sediments are limited by this silicon supply. We sho...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Leore Grosman Natalie D Munro Anna Belfer-Cohen

The Natufians of the southern Levant (15,000-11,500 cal BP) underwent pronounced socioeconomic changes associated with the onset of sedentism and the shift from a foraging to farming lifestyle. Excavations at the 12,000-year-old Natufian cave site, Hilazon Tachtit (Israel), have revealed a grave that provides a rare opportunity to investigate the ideological shifts that must have accompanied th...

2015
Christina Stantis Rebecca L. Kinaston Michael P. Richards Janet M. Davidson Hallie R. Buckley

The rise of stratified societies fundamentally influences the interactions between status, movement, and food. Using isotopic analyses, we assess differences in diet and mobility of individuals excavated from two burial mounds located at the `Atele burial site on Tongatapu, the main island of the Kingdom of Tonga (c. 500 - 150 BP). The first burial mound (To-At-1) was classified by some archaeo...

   In the recent years there has been attention on the management of dangerous wastes because of their incremental growth, since ignorance toward this problem will result in numerous environmental, social and economical problems. Finding an optimized place for the urban and rural waste burial, with least environmental danger and economical optimality is one of the main objectives of t...

Journal: :PLoS Medicine 2006
Oliver W Morgan Pongruk Sribanditmongkol Clifford Perera Yeddi Sulasmi Dana Van Alphen Egbert Sondorp

BACKGROUND Following natural disasters, mismanagement of the dead has consequences for the psychological well-being of survivors. However, no technical guidelines currently exist for managing mass fatalities following large natural disasters. Existing methods of mass fatality management are not directly transferable as they are designed for transport accidents and acts of terrorism. Furthermore...

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