Abstract
1. Red kidney beans were grown in pure quartz sand with nutrient solution to which were added in separate series Photosensin and the constituents of Photosensin-fluorescein, iron sulphate; sodium bicarbonate, and copper sulphate. 2. There were no pronounced visible differences among the living plants, and the differences in dry weight were small. Those plants receiving the small amount of copper sulphate weighed the most. 3. Apparently fluorescein does not stimulate growth of red kidney beans. 4. The so-called stunting effect heretofore ascribed to the high concentrations of fluorescein is shown to be actual killing by the extensive amounts of sodium bicarbonate used to keep the fluorescein in solution
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Fluorescein apparently does not stimulate growth of red kidney beans.
Not reportedComparator
Verbatim
e0“Red kidney beans were grown in pure quartz sand with nutrient solution to which were added in separate series Photosensin and the constituents of Photosensin-fluorescein, iron sulphate; sodium bicarbonate, and copper sulphate”
e3“Apparently fluorescein does not stimulate growth of red kidney beans”
Claim · model-written summary
The stunting effect ascribed to high fluorescein concentrations was actual killing by extensive amounts of sodium bicarbonate.
Verbatim
e0“Red kidney beans were grown in pure quartz sand with nutrient solution to which were added in separate series Photosensin and the constituents of Photosensin-fluorescein, iron sulphate; sodium bicarbonate, and copper sulphate”
e4“The so-called stunting effect heretofore ascribed to the high concentrations of fluorescein is shown to be actual killing by the extensive amounts of sodium bicarbonate used to keep the fluorescein in solution”
Claim · model-written summary
No pronounced visible differences appeared among the living red kidney bean plants.
Verbatim
e0“Red kidney beans were grown in pure quartz sand with nutrient solution to which were added in separate series Photosensin and the constituents of Photosensin-fluorescein, iron sulphate; sodium bicarbonate, and copper sulphate”
e1“There were no pronounced visible differences among the living plants, and the differences in dry weight were small”
Claim · model-written summary
Differences in dry weight among the red kidney bean treatments were small.
Verbatim
e0“Red kidney beans were grown in pure quartz sand with nutrient solution to which were added in separate series Photosensin and the constituents of Photosensin-fluorescein, iron sulphate; sodium bicarbonate, and copper sulphate”
e1“There were no pronounced visible differences among the living plants, and the differences in dry weight were small”
Claim · model-written summary
Red kidney bean plants receiving a small amount of copper sulphate weighed the most.
- Taxon
- Red kidney beanse0
- Treatment
- small amount of copper sulphatee2
- Outcome
- dry weighte1
- Direction
- weighed the moste2
Not reportedComparator
Verbatim
e0“Red kidney beans were grown in pure quartz sand with nutrient solution to which were added in separate series Photosensin and the constituents of Photosensin-fluorescein, iron sulphate; sodium bicarbonate, and copper sulphate”
e1“There were no pronounced visible differences among the living plants, and the differences in dry weight were small”
e2“Those plants receiving the small amount of copper sulphate weighed the most”
The same questions in other papers
copper atom · growth · Phaseolus vulgaris (common bean)Positive and negative results
3 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
6 papers more in this group
See all 10 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.