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Document Type

Research

Abstract

Long and Kersten (1936) found small doses of soft X-rays (long wave length) stimulate the growth of plants from seeds. Moore and Haskins (1933) observed retardation of growth of plants grown from seed irradiated with X-rays from the Coolidge tube which emanates a large proportion of hard X-rays (short wave length). Skoog (1935) has shown that 92 per cent (1000 units per cc.) hetero-auxin (B-indolyl acetic acid) in water is inactivated by hard X-rays filtered through lead, steel, and aluminum filters after exposure of 100 minutes, when the X-ray tube was operated at 3-4 milliamperes at 900 kilovolts. This raises the question as to whether "hetero-auxin" which is inactivated by hard X-rays is also inactivated by soft X-rays.

Publication Date

1942

Journal Title

Proceedings of the Iowa Academy of Science

Volume

49

Issue

1

First Page

139

Last Page

143

Copyright

© Copyright 1942 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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