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Vegetation Hist Archaeobotany 14 (1)
Title
The title of the publication or report
Title:
Vegetation Hist Archaeobotany 14 (1)
Series
The series the publication or report is included in
Series:
Vegetation History and Archaeobotany
Volume
Volume number and part
Volume:
14 (1)
Publication Type
The type of publication - report, monograph, journal article or chapter from a book
Publication Type:
Journal
Editor
The editor of the publication or report
Editor:
Felix Bittmann
Publisher
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Publisher:
Springer
Year of Publication
The year the book, article or report was published
Year of Publication:
2005
Source
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Source:
BIAB (The British & Irish Archaeological Bibliography (BIAB))
Relations
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Relations:
URI:
http://www.springerlink.com/openurl.asp?genre=journal&issn=0939-6314
Created Date
The date the record of the pubication was first entered
Created Date:
17 Aug 2005
Please click on an Article link to go to the Article Details.
Article Title
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Page
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Abstract
Multivariate statistical and other approaches for the separation of cereal from wild Poaceae pollen using a large Holocene dataset
John C Tweddle
Kevin J Edwards
Nick R J Fieller
15 - 30
Studies of the characteristics of modern pollen populations indicate that it may be possible to distinguish cereal pollen from that of many (but not all) undomesticated Poaceae species, though there are few detailed investigations into the applicability of such studies to palaeoecological samples. The paper assesses the reliability of available keys for identifying sub-fossil grass pollen using a large Holocene dataset obtained from a series of well-dated profiles from lowland Yorkshire, England. Pollen within the dataset is classified using the keys of Andersen (Danmarks Geol Undersøgelse, Arbog, 1978, 69'“92, 1979) and Küster (1988), and the resulting identifications are compared. The possibilities of combining the two approaches and employing the multivariate statistical techniques of principal component and discriminant analysis to achieve greater confidence of identification are then investigated. Finally, the findings of the above analyses are used to discuss the interpretation of incidences of large Poaceae pollen (i.e. >37 \\mu m grain diameter as measured in silicone oil) within the palynological record, particularly during prehistory.
Digital imaging analysis of size and shape of wheat and pea upon heating under anoxic conditions as a function of the temperature
Freek Braadbaart
Pim F van Bergen
67 - 75
The paper describes three types of experiments which were carried out. In the first series, emmer wheat grains (Triticum dicoccum Schübl), var. AR, and peas (Pisum sativum L.), var. RE, were heated at temperatures ranging from 130--700 °C under controlled anoxic conditions for a maximum of 120 min. Image acquisition was carried out on a flat bed scanner with a transparency adapter. Various size and shape factors are discussed and the definitions of the selected size and shape factors are given. The size and shape were measured and the mean calculated from thirty of the untreated specimens and the charred residues heated at each temperature. The results show a change of size and shape as a function of the temperature. The changes for wheat grains and peas are not identical. It is suggested that the presence of the pericarp enclosing the wheat grains causes this difference. In a second series of experiments it was shown that untreated grains of emmer wheat, bread wheat and macaroni wheat can be separated by measuring the shape, but size varies too much within each species, probably the result of different growing conditions, to be useful for separation purposes. As a result of heating at temperatures higher than 290 °C the shape of the three species becomes identical. This implies that the three species can no longer be separated after being heated, solely on the basis of size and shape. Finally, both emmer wheat grains enclosed by chaff and without chaff were heated under similar conditions. After removal of the chaff from the former, the size and shape of the grains were measured. The results show no significant difference in size and shape between both types.
