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vol. 18, nr. 2 (2011)
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Influence of preliminary drying of rye roots on specific area measured by adsorption methods
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Alicja Szatanik-Kloc, Dawid Wiater
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Institute of Agrophysics PAS, Doświadczalna 4, 20-290 Lublin, Poland |
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vol. 18 (2011), nr. 2,
pp. 469-479
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abstract:
The roots of winter rye variety Rostockie were studied. The plants were grown in the water cultures at pH=7, in the strictly controlled Hoagland solution in the cycle 16h night/8h day, at 296 K (day) and at 289 K (night). Adsorption0desorption isotherms were measured by adsorbates: water vapour and nitrogen. The specific surface of roots was determined using the BET adsorption theory. The specific surface of roots determined nitrogen (free) was smaller than the specific surface determined by water vapour (apparent). The specific surface of the roots preliminarily dried at 378K was smaller than the specific surface of the roots preliminarily dried at 303K. No significant influence of the level of fragmentation of the roots material on size of the specific surface was meted
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keywords:
apparent specific surface area (water vapour) and free specific surface area (nitrogen), roots, temperature
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original in:
Polish
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