We report on the 14 C dating of sediment samples from Bavaria using the Erlangen AMS facility. The absolute time calibration of different sediment profiles together with pollen analyses should establish a better chronology of climate and vegetation during the Holocene in Bavaria. The methods to ...
Using a high resolution 14C chronology, Sl C values and organic carbon content, from loess/paleosol and peat profiles in China, we can demonstrate century ... 周卫建,安芷生,S.C.Porter,... - 《中国科学:地球科学(英文版)》 被引量: 22发表: 1997年 New frontiers in dating of geological, ...
137Cs vertical profiles have been successfully used for comparing sedimentation rates. However, it is very difficult to use the 137Cs dating technique for determining low sedimentation rate ( 1cm / a) because of sampling problem, so it is necessary to improve on the differentiation level of ...
China’s Chang’E-5 (CE5) mission returned 1.731 kg of lunar materials from Northeastern Oceanus Procellarum basin (43.06°N, 51.92°W) of the Moon, which is located at a higher latitude than that explored by all previous sampling missions16,17. Radiometric dating using the lead-lead (...
A typical pattern of the behavior of 40Ar and 39Ar released from 40Ar/39Ar samples which have excess 40Ar is presented in this paper. The mechanism has been discussed in the text. 展开 关键词: 40)Ar/~(39)Ar dating Excess ~(40)Ar Gas released curve Diffusion ...
Diagnosis on anthrosols of Jianghan plain based on the physical features of layered samples of soil profiles Take Sanhu Farm of Four Lake area of Jianghan Plain as a study area,measurement and analyses of physical characteristics of the layered soil samples of ... AI Tiancheng,H Wang,LI Cheng...
Optical and near-infrared reflectance profiles of the samples measured using optical microscopy, Fourier transform infrared (FTIR) spectroscopy and the infrared hyperspectral microscope (MicrOmega)31,32show very dark features with an albedo of ~0.02 from 0.4 µm to 4 µm (Figs.3and4), ...
isotope datingsample preparationsilicatessilicon 32soilsA procedure for the preparation of soil samples for Si measurements is described. Two different soil profiles have been studied. The obtained Si concentrations in these profiles indicate a sorption of Si on clay, ferric-manganese hydroxides as well...
Antiretroviral therapy reduces such stimuli but many drugs have intrinsic toxicity profiles impacting on metabolism or potential direct cardiotoxicity. In a moment when the main guidelines of HIV therapy are predating the point when to start treating, we mean to highlight the contribution of HIV-1 ...
This study presents, attenuated total reflection Fourier transforms infrared spectroscopy of dried serum samples in an effort to assess biochemical changes induced by non-Hodgkin’s lymphoma and subcutaneous melanoma. An EL4 mouse model of non-Hodgkin lymphoma and a B16 mouse model of subcutaneous mela...