Circadian Rhythm of Carbon Dioxide Production by Anthurium Flowers

Circadian Rhythm of Carbon Dioxide Production by Anthurium Flowers

A circadian rhythm in CO2 production was observed in three cultivars of Anthurium andraeanum Andre (‘Jaya’, ‘Fla-range’, ‘Leonette’) flowers. The rhythmicity was not affected by light, darkness, and detachment. However, the amplitude was dampened in darkness and after detachment. Spadix respiration accounted for 90% of the total flower respiration. Rhythmicity in CO2 production continued after ...

Biofixation of Carbon Dioxide from Kerosene Combustion and Biomass Production by Spirulina

  Background and purpose: CO2 is the main cause of greenhouse effect. Previous studies have shown that CO2 in methane and coal flue gas can lead to microalgae growth. The aim of this research was to study the CO2 biofixation by Spirulina and injecting kerosene flue gas. Materials and methods: A photo bioreactor was fabricated in which kerosene flue gas and air were separately injected. The ph...

Pyrethrin exraction from pyrethrum flowers using carbon dioxide

Extractions of pyrethrins from ground pyrethrum flowers, using supercritical carbon dioxide as the solvent, were carried out in a semi-batch pilot plant (extraction volume: 200 ml). Extracts were very similar to those obtained by hexane Soxhlet extraction, except that the ratio of pyrethrins I to pyrethrins II was lower (1.58 instead of 1.79), and less pigments were present. At 40 8C, the amoun...

Enhancement of enterotoxin production by carbon dioxide in Vibrio cholerae.

We found that Vibrio cholerae 569B produced much more cholera enterotoxin in the presence of added carbon dioxide than in its absence. An atmosphere of 10% carbon dioxide was optimal for maximal enterotoxin production.

The Production of Carbon Dioxide by Isolated Fruit Tissues