Phytolith remains of rice (Oryza sativa L.) recovered from the Shangshan site in the Lower Yangtze of China have previously been recognized as the earliest examples of rice cultivation. However, because of the poor preservation of macroplant fossils, many radiocarbon dates were derived from undifferentiated organic materials in pottery sherds. These materials remain a source of debate because o...

Very soon after the discovery of radioactivity, measurements of the heavy radioactive elements existing in nature were undertaken to determine the age of rocks (Rutherford 1904), but only when Professor Willard Libby in an evening lecture during the first United Nations Conference on the Peaceful Uses of Atomic Energy in Geneva in 1955 described how he and his research team had evolved the carb...

Biosignal Research Center, Kobe University, Kobe 657-8501, Japan, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK, Department of Neurophysiology, Gunma University Graduate School of Medicine, Maebashi, Gunma 371-8511, Japan, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan, Department of C...

Sea surface reservoir ages must be known to establish a common chronological framework for marine, continental, and cryospheric paleoproxies, and are crucial for understanding ocean-continent climatic relationships and the paleoventilation of the ocean. Radiocarbon dates of planktonic foraminifera and tephra contemporaneously deposited over Mediterranean marine and terrestrial regions reveal th...

Sudan I is generally considered mutagenic based on various in vitro and in vivo tests and is carcinogenic in the rat. Dose-response modelling of the data for hepatocellular adenomas in male rats gave a BMDL(10) of 7.3mg/kg-bw/day. Sudan I is an unauthorised substance that might be present in food intermittently. The great variability and uncertainties in the human exposure data which are countr...