scholarly journals Ancient ceramic analysis by neutron activation in association with multivariate methods

2005 ◽  
Vol 35 (3b) ◽  
Author(s):  
U. M. Vinagre Filho ◽  
R. M. Latini ◽  
A V. B. Bellido ◽  
A. Buarque ◽  
A. M. Borges
Keyword(s):  
Neutron Activation ◽  
Multivariate Methods ◽  
Ceramic Analysis ◽  
Ancient Ceramic

scholarly journals Ceramic micropalaeontology: the analysis of microfossils in ancient ceramics

2007 ◽  
Vol 26 (2) ◽  
pp. 159-168 ◽  
Author(s):  
Patrick S. Quinn ◽  
Peter M. Day
Keyword(s):  
Ceramic Analysis ◽  
Common Component ◽  
Ancient Ceramics ◽  
Detailed Assessment ◽  
Ancient Ceramic ◽  
Archaeological Ceramic

Abstract. Microfossils can be a common component of ancient ceramic artefacts. Their analysis in this unusual context is a little-known, yet promising, cross-disciplinary application of micropalaeontology. This article presents the first detailed assessment of the phenomenon of microfossils in ancient ceramics and demonstrates how micropalaeontology can contribute to a range of issues in archaeological ceramic analysis and the reconstruction of the human past. In describing a methodology by which micropalaeontologists and archaeologists can analyse microfossiliferous ceramics, this paper presents the foundations of an approach, which is here referred to as ‘ceramic micropalaeontology’.

scholarly journals Ceramic analysis in Greece

2016 ◽  
Vol 62 ◽  
pp. 89-102
Author(s):  
Jill Hilditch
Keyword(s):  
Ceramic Material ◽  
Cultural Tradition ◽  
Historical Overview ◽  
Ceramic Analysis ◽  
Production Sequence ◽  
Greek Archaeology ◽  
Research Themes ◽  
Ancient Ceramic ◽  
Indispensable Tool ◽  
Shed Light

Scientific, analytical or ‘archaeometric’ techniques for investigating ceramic material have been used within archaeology for over 50 years and now constitute an indispensable tool for archaeologists in the Aegean world (see Jones 1986 for a detailed summary of early work in Greece and Italy) and beyond (Santacreu 2014). This paper provides a brief historical overview of research themes investigated by ceramic analysis in Greek archaeology along with reports on a small number of recent studies, in order to demonstrate current methodologies and results. The narrative is not chronological, either by the date of analysis or the material analysed, but instead focuses on the types of archaeological questions that ancient ceramic analysis can address in order to shed light upon who produced, distributed and consumed the ceramics under consideration. Ceramic analysis investigates both the composition and technology of fired clay vessels, evidenced most frequently in the ubiquitous broken pot sherd, which can then be used to identify provenance, production sequence and cultural tradition, as well as to provide a relative date for production, in combination with typological and seriation techniques.

Development of a Rapid Survey Method of Sampling and Analysis for Asbestos in Ambient Air

1972 ◽  
Vol 30 ◽  
pp. 630-631 ◽  
Author(s):  
R. E. Heffelfinger ◽  
C. W. Melton ◽  
D. L. Kiefer ◽  
W. M. Henry ◽  
R. J. Thompson
Keyword(s):  
Neutron Activation ◽  
Ambient Air ◽  
Survey Method ◽  
Potential Hazard ◽  
Transmission Microscopy ◽  
Comparative Analyses ◽  
Asbestos Fibers ◽  
Controlled Conditions ◽  
Unequivocal Identification ◽  
Identification And Quantification

A methodology has been developed and demonstrated which is capable of determining total amounts of asbestos fibers and fibrils in air ranging from as low as fractional nanograms per cubic meter (ng/m3) of air to several micrograms/m3. The method involves the collection of samples on an absolute filter and provides an unequivocal identification and quantification of the total asbestos contents including fibrils in the collected samples.The developed method depends on the trituration under controlled conditions to reduce the fibers to fibrils, separation of the asbestos fibrils from other collected air particulates (beneficiation), and the use of transmission microscopy for identification and quantification. Its validity has been tested by comparative analyses by neutron activation techniques. It can supply the data needed to set emissions criteria and to serve as a basis for assessing the potential hazard for asbestos pollution to the populace.

Madness, Mores, and Multivariate Methods

1978 ◽  
Vol 23 (11) ◽  
pp. 878-879
Author(s):  
LUIZ NATALICIO
Keyword(s):  
Multivariate Methods

Gamma-Ray Spectrometric Analysis of Some Trace Elements in the Human Articular Disc of the Mandible

1963 ◽  
Vol 03 (02) ◽  
pp. 175-182 ◽  
Author(s):  
Bo Bergman ◽  
Rune Söremark
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Quantitative Data ◽  
Thermal Neutron Flux ◽  
Gamma Ray ◽  
Dry Weight ◽  
Gamma Ray Spectrometry ◽  
Spectrometric Analysis ◽  
Articular Disc ◽  
Group Separation

SummaryBy means of neutron activation and gamma-ray spectrometry the concentrations in the human mandibular articular disc of the following elements have been determined: Na, Mn, Cu, Zn, Rb, Sr, Cd, W, and Au. The discs were obtained at necropsy from seven men and nine women, ranging in age from 56 to 71 years.The activation was carried out in a thermal neutron flux of about 1.7 XlO12 neutrons × cm−2 × sec.−1 for about 20 hours. A chemical group separationwas performed before the gamma-ray spectrometry. Quantitative data based on the dry weight of the cartilage samples were obtained by comparing the photo-peak area of the identified elements with those of appropriate standards.

Tracing Estuarine Sediments by Neutron Activation

1977 ◽  
Author(s):  
Richard M. Ecker ◽  
John F. Sustar ◽  
William T. Harvey
Keyword(s):  
Neutron Activation ◽  
Estuarine Sediments

Evaluation of the uncertainty associated with sample holders in NAA measurements in LAN/IPEN

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Guilherme Soares Zahn ◽  
Regina Beck Ticianelli ◽  
Mitiko Saiki ◽  
Frederico Antonio Genezini
Keyword(s):  
Stainless Steel ◽  
Neutron Activation Analysis ◽  
Neutron Activation ◽  
Gamma Rays ◽  
Experimental Error ◽  
Steel Sample ◽  
Low Energy ◽  
Stainless Steel Sample ◽  
Gamma Emission ◽  
Energy Gamma

In IPEN’s Neutron Activation Laboratory (LAN/IPEN), thin stainless steel sample holders are used for gamma spectrometry in NAA measurements. This material is very practical, but its chemical composition may be troublesome, as it presents large amounts of elements with intermediate atomic number, with attenuation factors for low-energy gamma-rays that must not be neglected. In this study, count rates obtained using different sample holders were compared. To accomplish that, an Am-241 source, with 59-keV gamma emission, was used so that low-energy gamma attenuation differences can be determined. Moreover, in order to study the energy dependence of these differences, a Ho-166m source was also used. From these results, it was possible to analyze the experimental error associated to the variations between sample holders, with the aim of introducing an addictive term to the uncertainty analysis of comparative Neutron Activation Analysis results.

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