Betekenis van:
frond

frond
Zelfstandig naamwoord
  • blad van de varen
  • compound leaf of a fern or palm or cycad

Hyperoniemen


Voorbeeldzinnen

  1. total frond area;
  2. Chlorosis: is the yellowing of frond tissue.
  3. Frond number is the primary measurement variable.
  4. In this method frond number, frond area, fresh weight and dry weight are measurement variables.
  5. Total frond area: The total frond area of all colonies may be determined by image analysis.
  6. The desired toxicity parameters are therefore four ECx values for each inhibition level x calculated: ErCx (frond number); ErCx (total frond area, dry weight, or fresh weight); EyCx (frond number); and EyCx (total frond area, dry weight, or fresh weight).
  7. Necrosis: is dead (i.e. white or water-soaked) frond tissue.
  8. Toxicity estimates should be based on frond number and on one additional measurement variable (total frond area, dry weight or fresh weight), because some substances may affect other measurement variables much more than the frond number.
  9. In this test, surrogates for biomass, such as frond counts or frond area, are typically measured and the use of the term ‘biomass’ thus refers to these surrogate measures as well. Chlorosis: is the yellowing of frond tissue.
  10. Frond number is the primary measurement variable. At least one other measurement variable (total frond area, dry weight or fresh weight) is also measured, since some substances may affect other measurement variables much more than frond numbers.
  11. For this method, growth rates and yield are response variables derived from measurement variables like frond number, frond area, fresh weight or dry weight.
  12. Growth: is an increase in the measurement variable, e.g. frond number, dry weight, wet weight or frond area, over the test period.
  13. This is because there are test substances that impact frond number and other measurement variables differently.
  14. Toxicity estimates should be based on frond number and on one additional measurement variable (total frond area, dry weight or fresh weight), because some substances may affect other measurement variables much more than the frond number. This effect would not be detected by calculating frond number only.
  15. Frond: is an individual/single ‘leaf-like’ structure of a duckweed plant.