ミクロ・ケルダール法による縄文貝塚産の貝殻中の窒素定量

フォーマット:

論文

責任表示:

田崎, 和江 ; Tazaki, Kazue

言語:

日本語

出版情報:

地学団体研究会 The Association for the Geological Collaboration in Japan, 1967-01-30

著者名:

• 田崎, 和江
• Tazaki, Kazue

掲載情報:

地球科学 = Earth Science

ISSN:

0366-6611      
2189-7212      

巻:

21

通号:

1

開始ページ:

21

終了ページ:

24

バージョン:

publisher

概要:

金沢大学理工研究域地球社会基盤学系<br />Nitrogen both in the recent and fossil shells were analysed by micro-Kjeldahl method, the latter being from the Johmon shell-mounds (2000-9000 years B.P.) in the Kanto district, Japan. It is difficult to separat … e the organic metrials from calcium carbonate without any loss especially in the fossil shells, so the nitrogen analysis of the shell should be carried out with much calcium carbonate, not to remove it. The writer is successful in quantitative nitrogen analysis of the organic materials with much calcium carbonate (Fig. 1). Both the fossil and recent samples analysed are Anadara broughtoni, A. subcrenata, Ostrea gigas, Corbicula iaponica, C. leana, Meretrix lusoria, Mya japonica and Neverita didyma, which are shown in Table 1 with places of occurrence, absolute ages, and weight percents of nitrogen in the shell. In so far as the fossil shells of the Johmon shellmounds are concerned, it is concluded that nitrogen content of the shell indicates rapid diminishing in 2000 years and slow decreasing since then (Fig. 2). 続きを見る

URL:

http://hdl.handle.net/2297/00061686