scholarly journals Nerc Radiocarbon Age Measurements Determined By Radiometric Counting 1996–2005

Radiocarbon ◽  
2010 ◽  
Vol 52 (4) ◽  
pp. 1553-1555 ◽  
Author(s):  
M H Garnett ◽  
D D Harkness ◽  
B F Miller ◽  
A E Fallick ◽  
C L Bryant

We describe a new compilation of radiocarbon age measurements performed by the NERC Radiocarbon Laboratory that is freely available to access over the World Wide Web. The database contains 1000 14C measurements performed using the liquid scintillation counting method between 1996 and 2005, and further results will be added as the information is compiled. Contextual information including sampling location and the nature of sample material is provided, alongside 14C age results and publications codes. Hypertext links provide access to the original 14C age report associated with the samples, providing additional details. The 14C measurements were originally performed for earth and environmental science NERC projects and are therefore likely to be most relevant to the Quaternary research community.

Fuel ◽  
2021 ◽  
Vol 291 ◽  
pp. 120084
Author(s):  
Charles G. Doll ◽  
Andrew E. Plymale ◽  
Alan Cooper ◽  
Igor Kutnyakov ◽  
Marie Swita ◽  
...  

1975 ◽  
Vol 53 (9) ◽  
pp. 914-920 ◽  
Author(s):  
P. D. Shargool ◽  
T. T. Ngo

Excised roots from 5-day-old seedlings of Brassica napus L. var. Target, which had been grown in 2 × 10−4 M calcium chloride solution, were incubated in medium containing various concentrations of sulfate. The uptake of this ion by the roots was measured with the aid of [35S]-labelled sulfate and a liquid scintillation counting method. The membrane uptake system was shown to be sensitive to sodium cyanide and dinitrophenol. Kinetic examination of the process demonstrated that it was mediated by two separate systems each of which operated in a specific sulfate concentration range. One system was shown to have a low affinity for sulfate and was thought to remain inoperative until the second high-affinity system became saturated.


Author(s):  
Barbara Carminati ◽  
Elena Ferrari ◽  
Patrick C.K. Hung

A Web service is a software system that supports interoperable application-to-application interactions over a network. Web services are based on a set of XML standards such as Universal Description, Discovery and Integration (UDDI), Web Services Description Language (WSDL), and Simple Object Access Protocol (SOAP). Recently, there have been increasing demands and discussions about Web services privacy technologies in the industry and research community. To enable privacy protection for Web service consumers across multiple domains and services, the World Wide Web Consortium (W3C) published a document called “Web Services Architecture (WSA) Requirements” that defines some fundamental privacy requirements for Web services. However, no comprehensive solutions to the various privacy issues have been so far defined. For these reasons, this chapter will focus on privacy technologies by first discussing the main privacy issues in WSA and related protocols. Then, this chapter illustrates the standardization efforts going on in the context of privacy for Web services and proposes different technical approaches to tackle the privacy issues.


2019 ◽  
Vol 184 (3-4) ◽  
pp. 440-443 ◽  
Author(s):  
Bin Feng ◽  
Quan Tang ◽  
Hui Zhang ◽  
Bo Chen ◽  
Shoukang Qiu ◽  
...  

Abstract For more accurate measurement of the potential alpha energy concentration (PAEC) of radon progeny by the liquid scintillation counting (LSC) method, its counting efficiency was studied in this work. A radon progeny standard source was used to provide different concentrations of radon progeny, and the progeny collected on the sampling filters were measured with a low background liquid scintillation counter. The result showed that the quenching effect could not be ignored, and the counting efficiency was estimated to be 86.12%. The co-comparison experiments showed that the PAECs of radon progeny measured by the LSC methods were in generally consistent with those of other three methods. It indicates that for more accurate measurements of PAEC of radon progeny by using the LSC method, the counting efficiency should be well determined.


2020 ◽  
Vol 120 (1) ◽  
pp. 1-8 ◽  
Author(s):  
S. Rashmi Nayak ◽  
Renita S. D’Souza ◽  
Mohan M. Purushotham ◽  
Bharath Seraje ◽  
Dileep N. Blangat ◽  
...  

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