Abstract
Parallel measurements of the osmotic pressure (cryoscopic method) and the refractive index of cell sap were carried out on 246 samples from seven plant species. At the same time both values were ascertained as well as their relation for aqueous solutions of some sugars, organic acids and inorganic salts. The relations found with these model solutions are different for different substances. The quantitative composition of osmotically active components of cell sap changes in the course of ontogenesis and as a result the relation of refractive index and osmotic pressure also changes. By this comparison it has been shown that a reliable and more or less linear relation of the two values, which is advantageous for practical application, is only valid for a limited period in the ontogenesis of the experimental plant. The determination of the osmotic pressure of cell sap from the refractive index, the main advantage of which is its quickness and the small volume of sap required (0-02 ml.), is reliable if we construct empiricallyad hoc the appropriate correlation graph for the experimental plant for a limited ontogenetic period.
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 6
Claim · model-written summary
The relation between refractive index and osmotic pressure differs between model solutions of different substances.
- Outcome
- relations found with these model solutionse1
- Qualifier
- different for different substancese1
- Comparator
- aqueous solutions of some sugars, organic acids and inorganic saltse2
Not reportedTaxonDirection
Verbatim
e1“The relations found with these model solutions are different for different substances.”
e2“At the same time both values were ascertained as well as their relation for aqueous solutions of some sugars, organic acids and inorganic salts.”
Claim · model-written summary
A reliable and roughly linear relation between refractive index and osmotic pressure holds only for a limited period in the ontogenesis of the experimental plant.
Verbatim
e1“By this comparison it has been shown that a reliable and more or less linear relation of the two values, which is advantageous for practical application, is only valid for a limited period in the ontogenesis of the experimental plant.”
e2“Parallel measurements of the osmotic pressure (cryoscopic method) and the refractive index of cell sap were carried out on 246 samples from seven plant species.”
Claim · model-written summary
Osmotic pressure of cell sap can be determined from refractive index for the experimental plant over a limited ontogenetic period, given a correlation graph built for that plant.
Verbatim
e1“The determination of the osmotic pressure of cell sap from the refractive index, the main advantage of which is its quickness and the small volume of sap required (0-02 ml.), is reliable if we construct empiricallyad hoc the appropriate correlation graph for the experimental plant for a limited ontogenetic period.”
e2“Parallel measurements of the osmotic pressure (cryoscopic method) and the refractive index of cell sap were carried out on 246 samples from seven plant species.”
Claim · model-written summary
Determining osmotic pressure from refractive index needs only a small sap volume of 0-02 ml.
Verbatim
e1“Parallel measurements of the osmotic pressure (cryoscopic method) and the refractive index of cell sap were carried out on 246 samples from seven plant species.”
e2“The determination of the osmotic pressure of cell sap from the refractive index, the main advantage of which is its quickness and the small volume of sap required (0-02 ml.), is reliable if we construct empiricallyad hoc the appropriate correlation graph for the experimental plant for a limited ontogenetic period.”
Claim · model-written summary
The quantitative composition of osmotically active components of cell sap changes in the course of ontogenesis.
Verbatim
e1“The quantitative composition of osmotically active components of cell sap changes in the course of ontogenesis and as a result the relation of refractive index and osmotic pressure also changes.”
e2“Parallel measurements of the osmotic pressure (cryoscopic method) and the refractive index of cell sap were carried out on 246 samples from seven plant species.”
Claim · model-written summary
The relation between refractive index and osmotic pressure of cell sap changes during ontogenesis.
Verbatim
e1“The quantitative composition of osmotically active components of cell sap changes in the course of ontogenesis and as a result the relation of refractive index and osmotic pressure also changes.”
e2“Parallel measurements of the osmotic pressure (cryoscopic method) and the refractive index of cell sap were carried out on 246 samples from seven plant species.”