1935

DOI: 10.1126/science.82.2139.626

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The Utility of Broken Automatic Pipettes

Pranay Mathur²

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Studies in Potato Storage

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²

1938

Annals of Applied Biology

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Summary Adolescent, mature and ripe potatoes continue to be distinguished by their respiratory behaviour throughout the period of storage. When potatoes are placed in storage there is a progressive increase in the concentration of internal carbon dioxide until the termination of the period of dormancy, the percentage of this gas falling rapidly with the commencement of sprouting. Data concerning the composition of the atmosphere surrounding the tubers show that, in general, there is an accumulation of carbon dioxide in the surrounding air with increasing periods in storage. There is a negative correlation between R.Q. and the percentage internal carbon dioxide during the stages of dormancy and sprouting. Records concerning the composition of samples of air withdrawn from top, middle and bottom layers of potatoes show a slightly higher percentage of carbon dioxide in the bottom layer than in the middle and top ones. Data concerning the permeability of the periderm of the potato to gas during storage indicate that the permeability of the superficial tissues decreases considerably during the dormancy of tubers.

Studies in Potato Storage

¹

,

²

1938

Annals of Applied Biology

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Summary Adolescent, mature and ripe potatoes continue to be distinguished by their respiratory behaviour throughout the period of storage. When potatoes are placed in storage there is a progressive increase in the concentration of internal carbon dioxide until the termination of the period of dormancy, the percentage of this gas falling rapidly with the commencement of sprouting. Data concerning the composition of the atmosphere surrounding the tubers show that, in general, there is an accumulation of carbon dioxide in the surrounding air with increasing periods in storage. There is a negative correlation between R.Q. and the percentage internal carbon dioxide during the stages of dormancy and sprouting. Records concerning the composition of samples of air withdrawn from top, middle and bottom layers of potatoes show a slightly higher percentage of carbon dioxide in the bottom layer than in the middle and top ones. Data concerning the permeability of the periderm of the potato to gas during storage indicate that the permeability of the superficial tissues decreases considerably during the dormancy of tubers.

A Precision Apparatus for Mixing Gases in Various Proportions

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1936

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A Precision Apparatus for Mixing Gases in Various Proportions

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²

1936

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